“Various” food packaging aluminum foil bags, understand the difference between washing aluminum bags and ordinary aluminum bags

Last time we talked about the difference between aluminum-plated food packaging bags and pure aluminum packaging bags. Today we talk about the difference between washed aluminum bags and ordinary aluminum bags. Aluminum foil bags are not simple at all. Would you like to know more? Please listen to the breakdown below:

Washing aluminum bag is also called partially hollowed out aluminum-plated bag. It is a partially transparent composite bag made up of plastic film and partly hollowed out aluminum-plated film (or part of aluminized layer in addition to aluminum). Cleaning aluminum is to remove or wash off the film. Partially aluminized layer. At present, the aluminum washing bag is a packaging bag product with high printing requirements at home and abroad, and a beautiful design effect. It is also an advanced anti-counterfeiting packaging popular in the world. It is generally used for outer packaging of clothing, hardware, electronics, toys, and food.

Next, Hunan Zekun Packaging explained the difference between down-washed aluminum bags and ordinary aluminum bags based on years of experience in the production of high-quality aluminum bags.

Ordinary composite aluminized bag is the whole bag or the front (or back) composite aluminized film of the whole bag. The aluminum washing bag is different, as long as you want which part of the bag has aluminum gloss effect, which part is transparent visual effect, You can design and produce it, not limited to a certain position or a certain regular pattern.

In terms of printing, the washing aluminum bag has a better printing effect than the ordinary composite aluminized bag, and in terms of decoration grade, it is more beautiful and beautiful than the ordinary composite aluminized bag. At present, there are many different methods and operating experience in the aluminum cleaning process, but few companies can achieve large-scale and efficient production. Now, some users have evolved this process into a transfer process, such as the aluminum-plating water washing process, which uses the aluminum water washing process in the cold tear transfer process to achieve a new anti-counterfeiting and packaging display effect. The aluminum washing process of aluminum film is also called dealuminization process, and some are also called partial hollowing dealumination process, which is called more often.

Generally speaking, aluminum washing bags have the characteristics of clear pictures and texts, high precision, strong three-dimensional effect, seemingly layered, colorful, smooth surface, and high wear resistance. From the perspective of commercial security, it is also a form of packaging with strong anti-counterfeiting, which helps to improve product quality and added value, and has strong market competitiveness.

If you want to know more about packaging bags, please pay attention to Hunan Zekun Packaging (https://www.zekunpackaging.net) or (https://www.zekunpackaging.com/)

What is an aluminized bag? Brief analysis of the difference between aluminum plating and pure aluminum

Everyone is relatively familiar with aluminum foil packaging bags, but they don’t know much about aluminum-plated bags, and they feel indistinguishable. So, what is aluminum-plated packaging bags? What is the difference with aluminum foil packaging bags?

According to Hunan Zekun Packaging, aluminum-plated bags are a kind of aluminum foil bags. Aluminum foil bags can be divided into pure aluminum bags and aluminum-plated bags. The appearance of aluminum-plated bags is opaque, silver-white, and has anti-gloss. It has good barrier properties, heat sealing properties, shading properties, high temperature resistance, low temperature resistance, oil resistance, fragrance retention; non-toxic and tasteless; softness and other characteristics. It has a certain degree of light resistance, and it can still transmit a certain amount of light compared with aluminum foil bags. The aluminum-plated bag has a certain degree of opacity and good light reflection performance, so the printing effect of the bag is better, the color is fuller, and the gloss is better. Compared with aluminum foil bags, bags are less prone to wrinkles.

The aluminum-plated bag adopts a four-layer structure with good toughness, high strength, and good water and oxygen barrier functions. The aluminum-plated bag mainly has the advantages of anti-static; vacuum-proof; light and oxygen; waterproof and moisture-proof; anti-volatile; high tensile strength; high-grade and exquisite packaging. The aluminum-plated bag can be used for moisture-proof, light-proof and vacuum packaging of food, pharmaceutical raw materials, biological chemicals, chemical raw materials, pharmaceutical intermediates, and lithium iron phosphate cathode materials.

Colored aluminum-plated bags are currently very popular gift packaging materials in the world. The outer layer is a color aluminum-plated film. The film adopts high-vacuum evaporation technology, has bright metallic luster, excellent gas and light barrier properties, and good moisture resistance. , Heat resistance, puncture resistance; excellent adaptability to printing and lamination. The inner transparent PE film has good heat sealability, which can ensure the firmness of the sealing edge. Generally, the color aluminized bag is in the bag The mouth has self-adhesive strips or easy-to-tear strips to facilitate packaging. The aluminum-plated bags are of high quality and bright in color. They are widely used in the packaging of various gifts, handicrafts and other industries that require environmental protection.

Aluminum foil bag packaging usually refers to aluminum-plastic composite vacuum packaging bags. This type of product is suitable for moisture-proof, light-proof and vacuum packaging of large-scale precision machinery, chemical raw materials, and pharmaceutical intermediates. It mostly adopts three-layer or four-layer structure, which has good water and oxygen barrier functions. Unrestricted, you can customize packaging bags of different specifications and styles, and can be made into flat bags, three-dimensional bags, organ bags, zipper bags and other styles. Products need to be tested by GB and ASTM standards. Products meet environmental protection requirements (third-party test reports can be provided). Products meet the most stringent environmental protection standards for packaging materials in the European Union and North America.

Aluminum foil bags are divided into pure aluminum bags and aluminum-plated bags. How to distinguish aluminum-plated bags and pure aluminum bags in daily life? There are a few points to summarize:

1. In terms of material, the pure aluminum bag is pure aluminum with high purity and is a soft material; the aluminum-plated bag is mixed with composite materials, which is a brittle material.

2. In terms of cost, the price of pure aluminum bags is higher than that of aluminized bags.

3. In terms of performance, pure aluminum bags have better moisture-proof and cooling effects than aluminum-plated bags, pure aluminum bags are completely protected from light, and aluminum-plated bags have a shading effect.

4. In terms of use, pure aluminum bags are more suitable for vacuuming, such as cooked food, meat and other products, while aluminum-plated bags are suitable for tea, powder, electronic parts, etc.

5. The inside of the bag is facing the light or the sun, the light that can be seen through the bag is the aluminum foil, the invisible is the pure aluminum foil

Today, the editor of Zekun will share this with you. For more information, please pay attention to our website:https://www.zekunpackaging.net/  or    https://www.zekunpackaging.com/

Several major materials and advantages and disadvantages of plastic packaging bags

Today, the editor of Zekun takes everyone to understand several materials of plastic packaging bags and the differences between these materials.

The plastics commonly used in packaging mainly include polyethylene and polypropylene. Polystyrene, polyvinyl chloride, polyurethane, phenolic resin.

1. polyethylene (PE)

Polyethylene is a high-molecular polymer of ethylene. It is a kind of thermoplastic. According to its industrial production method, there are high-pressure, medium-pressure, and low-pressure polymerization methods. Different production methods have very different molecular structures, and product properties also vary with molecular structures.

Polyethylene is a milky white waxy solid, lighter than water, softer, good water resistance, low temperature resistance, odorless, non-toxic, poor heat resistance, poor film air tightness, and sensitive to ultraviolet rays. It is easy to oxidize and age, and the thermal shrinkage changes greatly, and the printing performance is poor. According to its density. It can be divided into high-density, medium-density, low-density polyethylene, and linear low-density polyethylene. 

2. Polypropylene (PP)

Polypropylene is a by-product propylene from petroleum refining. The refined propylene monomer is polymerized under the catalysis of a catalyst and then separated from the polymer. The molecular weight is 100,000 to 500,000, and the density is very small, which is the smallest among known plastics; non-toxic, odorless, high transparency, mechanical properties, surface strength, friction resistance, chemical corrosion resistance, and moisture resistance are all good; at room temperature Above, the impact resistance value is large, but the low temperature impact resistance value is small; it is prone to static electricity, and the printing performance is not good. Polypropylene has a wide range of raw materials, low price, and wide adaptability of performance. It is widely used in the food industry. It is mostly used to make films and composite films. It has good transparency and surface gloss, and can withstand temperatures of 120 degrees; it can be made into packaging boxes, blow molded into plastic bottles, and certain fillers can be added to make certain machine parts.

3. Polystyrene (PS)

Polystyrene is ethylene and benzene catalyzed by anhydrous aluminum trioxide, undergoes an alkylation reaction to generate ethylbenzene, and then undergoes catalytic dehydrogenation to obtain styrene. Styrene monomer is heated and polymerized into polystyrene in an aqueous suspension of an appropriate amount of initiator (benzoyl peroxide) and dispersant (polyvinyl alcohol). Polystyrene is a colorless, transparent, non-ductile thermoplastic; non-toxic, odorless, odorless, good colorability, moisture permeability is greater than polyethylene, low moisture absorption, dimensional stability, good gloss; processing properties Good, low cost; mechanical properties increase with the increase of molecular weight; low heat resistance, can not be used in boiling water; low temperature resistance, can withstand low temperature of -40 ℃; good indoor aging resistance; to alcoholic organic solvents , Mineral oil has good tolerance, acid and alkali resistance is also very good.

Due to its superior performance, low price, and wide application, polystyrene can be made into films and containers, and is widely used in the food industry; the shrinkage rate can reach 60-70%, and it is a good material for making shrink packaging and has good insulation properties. It can make a variety of telecommunication parts; it can also make various machine parts, toys, daily necessities, etc.; adding foaming agent to polystyrene can make foam plastic, which is a good cushioning packaging material.

4. Polyvinyl chloride (PVC)

“Polyoxyethylene” is a suspension polymerization or emulsion polymerization of vinyl chloride to produce polyvinyl chloride through the action of primers. It is light brown, transparent, good toughness, density 1.4g/cm; it has good chemical stability, is not easy to be corroded by acid and alkali; air tightness, water resistance, heat sealing performance, good printing performance, production energy consumption Less, cheap; mechanical strength, wear resistance, pressure resistance are better than polyethylene and polypropylene. The main disadvantages are poor thermal stability, easy decomposition when heated, and release of hydrogen chloride gas. Due to the different types and quantities of additives, such as plasticizers and stabilizers, polyvinyl chloride can be made into different products and can produce hard products, such as hard pipes, building materials, etc.; it can be used to make artificial leather, wire and cable insulation, Plastic floor, etc. Its main function in packaging is to make a film, which is divided into three types: soft film, hard film, and shrink film. The soft film has a soft texture and good heat-sealability, suitable for high-frequency sealing; low tensile strength, high tear strength; poor sliding properties, and poor processing performance.The tensile strength and tear strength of the hard film are large, the texture is harder, and the elongation is small; the moisture permeability is small, the gas barrier property is good, and the sliding property is good; the printing adaptability is good, but the appropriate ink solvent must be selected; It has poor temperature resistance and becomes brittle at low temperatures. The shrink film has good transparency, low air permeability, shrinks when heated, a wide shrinking temperature range, and a large shrinkage rate. It is a good heat shrinkable packaging material. According to different production processes, it can be divided into dry stretching. Tubular stretching and vertical and horizontal unidirectional stretching and other varieties.

5. Polyester (PET)

“Polyester” is a polycondensation product of terephthalic acid and ethylene glycol. Compared with other plastics, polyester has excellent barrier properties, such as carbon dioxide, oxygen, water and fragrance, etc. It can be well barrier; with excellent mechanical properties, it has high strength, compression resistance and impact resistance.; Good chemical stability, resistance to acid and alkali corrosion; high transparency, good gloss and optical properties; non-toxic, tasteless, in line with food hygiene standards; its structure has ester groups, so the printing performance is good. Polyester is a unique and versatile packaging material. Film can be made into packaging containers such as bottles, cans, cups, etc., and it can also be used as a dual-purpose bakeable tray.

6. Phenolic plastic (PF)

Phenolic resin is formed by polycondensation of phenols (mainly phenol) and aldehydes (mainly formaldehyde). Depending on whether the catalyst is acidic or basic, the ratio of phenol to formaldehyde is different. Thermoplastic resin or thermosetting resin can be obtained. The two can be transformed into each other under suitable conditions. In practice, thermosetting resins are often used. Phenolic resin has good mechanical strength and thermal strength; good moisture resistance and corrosion resistance; easy processing and low price.

After adding different fillers and curing agents to the phenolic resin, different phenolic plastics can be produced. Various sheet fillers are added to thermosetting resin, and laminates with various properties can be obtained after lamination; adding foaming agent can make phenolic foam; when phenolic plastic is used for packaging, phenolic resin is mixed with filler and cured Powder, coloring agent, etc. are made into molding powder, and then molded into bottle caps, machine parts, daily necessities, and some packaging containers.   

Phenolic plastic products have good chemical stability; excellent heat resistance; high mechanical strength and wear resistance; not easy to deform, but poor elasticity; good electrical insulation; monotonous color, mostly dark red or black. Since its main raw materials are phenol and formaldehyde, which are both toxic to a certain extent, it is not suitable for food packaging materials.

7. Polyamide (PA)

Polyamide is commonly known as “nylon”, which can be obtained by polycondensation reaction of dibasic acid and dibasic acid. Polyamide is non-toxic, colorless and transparent; it has good abrasion resistance. Strong impact toughness, excellent mechanical properties; good light resistance, not easy to aging under light; good oil resistance, good chemical stability, but not resistant to alcohols, formic acid and phenol; good air tightness; high temperature adaptability, which can be in -40 Used in the range of ~100 degrees; good printability and decoration; high moisture absorption.
  Polyamide has a wide range of uses, such as bearings, gears, pump blades, and auto parts. Its application in packaging is mainly flexible packaging. It can be made into film for food packaging and can also be used to make packing belts and ropes. Its sturdiness is better than polypropylene packing belts.          

8. Urea-formaldehyde plastic (UF)

Urea-formaldehyde plastic, commonly known as “electric jade”, is made of urea and formaldehyde as raw materials, through polycondensation reaction to obtain urea-formaldehyde resin, and then add fillers, colorants, lubricants, plasticizers, etc., processed into compression molding powder (electric jade powder), and then It is heated and molded into products. It has large surface hardness, certain mechanical strength, not easy to deform, but relatively brittle; it is odorless, tasteless, strong in coloring power, bright in color, and looks like beautiful jade; it has good heat resistance, not easy to burn, acid and alkali resistance, and water resistance. Poor, high water absorption, good electrical insulation. Urea-formaldehyde plastics can be made into a variety of products, such as daily necessities and electrical components. The package can be made into beautiful packaging boxes, packaging trays, bottle caps, etc.; because formaldehyde has a certain toxicity, it is not suitable for food packaging. Adding a foaming agent to the urea-formaldehyde resin and using a mechanical method to make it foam, the urea-formaldehyde foam can be obtained. It is lightweight, inexpensive, good in heat preservation, and corrosion resistant, and is a widely used cushioning packaging material.

9. Melamine plastic (ME)

Melamine plastic and urea-formaldehyde plastic are both amino plastics. It is made of resin obtained by polycondensation reaction of melamine and formaldehyde as the main component, adding fillers, lubricants, coloring agents, hardeners, etc., and is formed by hot pressing. It is also a thermosetting plastic.

Melamine plastic is non-toxic, odorless, tasteless, and has good hygienic properties; it has high mechanical strength, good surface hardness, and is not easy to deform; the surface is smooth and feels like porcelain; it has strong impact resistance and pollution resistance; good chemical stability. Melamine plastic can be used to make packaging containers of various colors including food packaging.

10. Polyvinyl alcohol (PVA)

Polyvinyl alcohol is a hydrolysis product of polyvinyl acetate. It is transparent, non-toxic, and tasteless; it has excellent gas barrier properties, water resistance and oil resistance; good chemical stability; good printability, no static electricity; good mechanical properties.

Polyvinyl alcohol mostly uses its film in packaging, which can be used for food packaging. It has a significant effect on preventing oxidative discoloration, taste change and deterioration of food, and maintaining the freshness of food; it can also package other products, such as chemical products.

11. Polycarbonate (Pc)

“Polycarbonate” is a general term for resins containing carbonate structure in the molecular chain, and usually refers to bisphenol A type polycarbonate. It is colorless and transparent, has good gloss; it has excellent heat resistance and cold resistance, and can be used for pressure sterilization; it has high mechanical strength. It can be side by side with polyester and nylon; it has excellent impact toughness, and the product is not easy to break under impact; it has low water absorption, moisture absorption, and air permeability; it has good chemical resistance and can prevent ultraviolet rays from penetrating non-toxic, odorless, and tasteless; The molding performance is good, and general molding methods can be used. The precision of the molded product is very high. But the heat sealing performance is poor.

Polycarbonate is an engineering plastic with excellent comprehensive properties, which can be used to make various gears, machine parts, etc.; it can be made into films for packaging food and other items. When sealing is required, composite films are often used to improve heat sealing performance. ; Can also be made into various packaging containers.

12. Polyvinylidene chloride (PVDC)

“Polyvinylidene chloride” is a homopolymer of vinylidene oxide. It is non-toxic, tasteless and transparent; it has high mechanical strength. Good toughness; resistance to oil and organic solvents; good heat shrinkability and self-adhesiveness, easy adhesion between films; excellent air tightness and moisture resistance. However, it has poor machinability, poor thermal stability, is not easy to heat seal, and easily decomposes when exposed to ultraviolet rays.

The application of polyvinylidene chloride in packaging is mainly to make food packaging film, which can be used as a sealed package, which can effectively prevent food from absorbing moisture. Oil and fat foods are oxidized to ensure long-term food quality; it can be used as sterilized food packaging because it can be heat sterilized; it can also be used as a packaging material for household daily use.

13. Polyurethane (PVP)

“Polyurethane” is also called polyurethane, which is made by the reaction of isocyanate and hydroxyl compound. The main characteristics of polyurethane are good wear resistance, excellent low temperature resistance, outstanding oil resistance and chemical corrosion resistance. Polyurethane is mainly processed into foam plastics, and foams with different hardness and softness can be obtained by changing the raw materials and the ratio. Soft products have good toughness, good elasticity, and oil resistance. They are the main varieties of polyurethane foam and are widely used in packaging to make cushioning materials such as cushions. Rigid products are heat-resistant, cold-resistant, heat-insulating, and have excellent shock resistance. They are widely used in the packaging of precision instruments and meters. The production of polyurethane foam is simple. Easy to operate, low cost, good shockproof performance, can be prepared at room temperature, especially can be prepared by on-site foaming, which brings great convenience to packaging.

Ok, let’s share common knowledge about packaging bags here. If you want to know more, please follow the website of Hunan Zekun Packaging Technology Co., Ltd.: https://www.zekunpackaging.net/ or https://www.zekunpackaging.com /

What are the functions of the dazzling array of food packaging bags?

In our daily life, we are often attracted by various food packaging bags on the shelves of supermarkets and shopping malls. Packaging bags are a type of packaging design. In order to keep fresh and store food in life, product packaging bags are produced. Food packaging bags refer to film containers that directly contact food and are used to hold and protect food.

The functions of food packaging bags are:

1. Physical protection: Food stored in plastic packaging bags should avoid extrusion, impact, temperature difference and other phenomena.

2.Shell protection: The shell can separate food from oxygen, water vapor, stains, etc., and leakage prevention is also a necessary factor in packaging design. Some packages include desiccants or deoxidizers to extend shelf life. Vacuum packaging or removing air from the packaging bag is also the main food packaging method. Keeping the food clean, fresh and safe during the shelf life is the main function of the packaging bag.

3. Put it in the same bag: Putting small objects of the same kind in a bag is a good way to save volume. Powder and granular objects need to be packed.

4. Convey information: packaging and labels tell people how to use, transport, recycle or dispose of packaging or food.

5. Marketing: Marketing often uses packaging labels to encourage potential buyers to buy products. For decades, packaging design has become an important and constantly changing phenomenon. Marketing communications and graphic design are applied to the outer box and (for some reason) the highlights of the sales presentation.

6.Safety: Packaging can play an important role in reducing transportation safety risks. Packaging bags can also prevent food from being classified into other commodities. Food packaging can also reduce the possibility of food being illegally eaten. Some food packaging is sturdy and has anti-counterfeiting signs to protect the interests of businesses from loss. The packaging bag can have labels such as laser marking, special color, and SMS authentication. In addition, in order to prevent theft, retailers put electronic surveillance labels on food packaging bags, waiting for consumers to take them to the outlet of the store to demagnetize.

7. Convenience: The package may have facilities for loading and unloading, stacking, display, sale, opening, reloading, use and reuse.

8. Partial control: single packaging helps to accurately control the overall situation. For example, salt can be packaged to understand inventory. This also makes it easy to calculate recent sales, such as dairy companies sending and recycling milk bottles instead of letting consumers fill them up.

If you want to know more about packaging bags, please pay attention to Hunan Zekun Packaging (https://www.zekunpackaging.net/ or https://www.zekunpackaging.com/)

In addition to calculating the MOQ for food packaging bags, the printing price of food packaging bags is calculated like this

Last time we talked about the minimum order quantity of food packaging bags, then let’s talk about how the printing price of food packaging bags is calculated.

“When I need to make bags, how do I calculate the price of food packaging bags?” Let’s discuss this topic together.

1. First of all, you need to know what material and how many layers of materials the packaging bag you need is made of?

2. The second is to confirm the width, height and thickness of the packaging bag. For example, it is like you need to customize a three-side sealed packaging bag for dried fruits, and the load-bearing capacity is about 80g (C is the thickness unit, 1C=0.01mm) , Then Zekun Packaging recommends that you use a food packaging bag of about 8c.

3. Then, the printing price of the food bag can be calculated more clearly.

Price = first layer material (length * width * thickness * unit price of material) + second material (length * width * thickness * unit price of material) + third material (length * width * thickness * unit price of material) + Consumed ink price + consumed glue price + labor cost + manufacturer profit

The price of the packaging bag is determined according to different materials. For details, please consult Zekun Packaging Customer Service.

Hunan Zekun Packaging Technology Co., Ltd. was established on June 30, 2015. Its business scope includes the manufacturing of plastic packaging bags and containers, plastic films, daily plastic products, biodegradable plastic products, degradable plastic products, plastic products, and hardware products. Sales, packaging and decoration printing, other printed matter printing, plastic product research and development, consulting, rubber product wholesale, self-support and agent import and export of various commodities and technologies。

Why do custom packaging bags have a minimum order quantity? It’s not that flexible packaging manufacturers deceive customers

Many customers have encountered such problems. When they asked the packaging bag manufacturer for the minimum order quantity, the minimum order quantity was 35,000, or even more than 100,000. The first cooperation felt that the minimum order quantity was too high. And I don’t understand why. Especially for some customers who have just started their business and are not too large in scale, it is difficult to accept high MOQ. Today, Hunan Zekun Packaging, a professional flexible packaging manufacturer, explained the reasons for the high MOQ of packaging bags based on its own experience.

  1. The printing cost of the packaging bag is expensive

Packaging bag printing belongs to gravure printing. One color needs a copper plate, which we commonly call plate making. The plate fee is relatively expensive. Depending on the complexity of the pattern of the composite packaging bag, Renminbi is calculated at the exchange rate of 6.5 to U.S. dollars,a color ranges from $77-$123. For example, if you want to print a bag with 7 colors, the color plate fee will cost $539-$861 .

2.The MOQ depends on the length of the roll film

The minimum order quantity of packaging bags is generally calculated based on the length of a roll of material. The length of materials on the market is generally about 6000 meters. For example, a vacuum bag is made of PA/PE with a specification of 25*18mm. The order quantity is about 6000÷0.18=33333 pieces. Calculating the loss, the minimum order quantity of 30,000 pieces is not high.

The minimum order quantity for automatic packaging roll film is generally 300-500 kg.

3.If the minimum order quantity is not reached, the soft package factory will basically lose money

For packaging bag manufacturers, if the minimum order quantity is not reached, they will be at a loss if they do so. Because of the small quantity, a series of processes such as plate replacement, finalization, ink replacement, and color proofing are required. After more than 3 hours, if a roll of materials is not finished, the loss rate is very large, possibly reaching more than 50%, which is unacceptable for any packaging factory.

Therefore, many packaging bag manufacturers will also set the minimum consumption rule, that is, when the customer’s minimum order quantity cannot meet the minimum order quantity, the unit price of the packaging bag will be appropriately increased. Therefore, it is recommended that many customers who are pursuing the quality of packaging bags and want to customize packaging bags should coordinate production and storage as much as possible to achieve the minimum order quantity, so that they can purchase the packaging bags they want, and have the cost-effectiveness.

Hunan Zekun Packaging Technology Co., Ltd., established in 2015, is a professional modern automation enterprise in the research, development, sale and service of Flexible Plastic food Packages, plastic film roll, zip lock bag, stand up bag, Retort package and spout bag, we using High-end printing inks imported and 100% virgin exclusive formulation material, such as PE, PET, PP, OPP, AL, VMPET, as raw material etc…We are located in Hunan Province. Our company covers an area of 31000 square meters. About equipment, We own modern advanced production equipment, such as computer high-speed 9 colors printing machine with 1.3 meters maximum printing width; Widen large lamination machine; Electric eye folding machine; Full-automatic computer bag-making machine; What is more, we have many years experience in manufacturing plastic packaging bags. Dedicated to strict quality control and thoughtful customer services, we have excellent team who focus on product development & design, quality control & inspection and company operating. In order to supply the best products and services, we have built a modern quality management system which is in strict accordance with international standards. We have exported to all over the world market such as: U. S, U. K, Australia, Canada, Russian, Germany and most of America, Europe, Asia, Middle East countries We are glad to work together with you and finally bring you the satisfied products with common success.

The production process of a high-quality food packaging bag

In this modern era when food problems are frequent, food packaging bags, as food carriers, have become more and more important in our daily lives. More than 98% of food needs food packaging bags, and plastic packaging is the main one. The production process of food packaging bags is mainly divided into these five parts: packaging design-copperplate making-layout printing-composite packaging-bag cutting. Please refer to the following for the specific process, and the editor of Zekun Packaging will analyze it with you one by one:

1.Packaging design: This is to design the layout of the food packaging bag according to the requirements of the food company, that is, the pattern of the food packaging bag. The original design of food packaging bags is a test for the designers of food packaging bags. It requires detailed communication with customers, insight into customer needs, and at the same time, can give customers better suggestions. A good food packaging bag design layout is for Increasing product sales has a very good effect. After all, food packaging is still very important at first glance. There is also a situation where the pattern has been designed by the food company and directly produced by the packaging bag manufacturer.

2. Copperplate making: It is to make the copperplate required on the food packaging printing machine according to the confirmation draft of the food packaging bag design. After the artwork is confirmed, a professional technician is required to separate the patterns and repair some unclear places. The plate is a cylinder, and it is a complete set, not a single one. The specific size and number of plates should be determined according to the packaging design in the previous step. You have to make one copperplate for one color, and if you have 5 colors, you have to make 5 copperplates. Of course, you can also make a common plate sometimes.

3. Layout printing: Install the prepared copper plate on the food packaging printing machine, and then print it according to the first layer of material confirmed by the food company, because a food packaging bag is usually composed of three layers of materials. And printing only needs one layer of the printing surface. The printed renderings are the same as the design drawings. Zekun packaging uses a nine-color fully automatic computer-controlled printing machine. The printing effect can be compared with the poster.

4. Composite: The so-called composite is to bond two materials together and stick the ink surface in the middle of the two layers of materials, such as pa (nylon)/pe (reinforced), where nylon is the first layer of material, that is, the printed material , pe (enhanced) is the second layer of material or composite material, and in some cases there will be a third and fourth layer of material. For ordinary aluminum foil bags (opp light film/al aluminum foil/pe reinforcement), the third layer is required. Note: It is usually necessary to check the previously printed materials in one step before lamination, and eliminate the materials with poor printing effect.

5. Bag making and bag cutting: bag making and bag cutting are done on the same machine. After the materials are compounded, they are placed on the bag making machine. After the bag making machine is debugged, it can be carried out according to the adjusted size. Heat seal the food packaging bag material, and finally cut the bag according to the adjusted size. Fully automatic from bag making to bag cutting. Zekun Packaging has a fully automatic bag making machine. Higher efficiency and better quality.

Analysis of lidding films and its advantages

In the food industry, and especially in produce, lidding film (or top seal) has become a primary flexible packaging choice. Not only does it provide extra benefits for customers, but it creates opportunities for brands to elevate their product as well.

What are lidding films?

Lidding films are a type of flexible packaging film. Generally speaking, they are most commonly made from paper, foils, polyethylene, polyester, and other types of flexible packaging materials.

Lidding films are available in both easy-peel and lock-tight versions. With easy-peel, as the name would suggest, the consumer can peel the film from the container with relative ease.

On the other hand, lock-tight films seal so tightly; you need a tool (such as scissors or a knife) to gain access to the product. This type of film features a layer of sealant that is laminated to the lidding film for superior adhesion.

What are lidding films used for?

Lidding films are most commonly used to seal plastic containers, paperboard pints, or trays for food items such as dairy products like sour cream and cottage cheese. Other products packaged in lidding films may also include canned soups, meats, microwave dinners, and other foods packaged in rigid containers.

What are the benefits of lidding film?

1.Consumers can see the product that they’re purchasing clearly through the film while keeping the package intact. Also, peel and reseal lidding film allows customers to completely reseal their produce packaging with ease.

2.Rather than being limited to a label on a container, lidding film has a large surface area that can enable innovative branding and maximum shelf impact.

3.Lidding film offers high barrier protection capabilities with the use of specialty films in production. Barrier protected film keeps produce fresh for longer and extends the shelf life of a product. Find out more about barrier protection in our blog post here.

4.In addition to being able to reseal the product completely, you can integrate traceability software into lidding film with the help of our specialized equipment department. This allows you to keep track of your raw materials from the time they enter your facility to when they’re released into the field. Adding this software increases supply chain visibility, improves quality control, and offers your company extra protection should you have to recall any of your products.

5.Lidding film uses up to 25% less plastic than a traditional clamshell. At Associated, we also offer fully recyclable and sustainable film options for lidding film.

At Associated, we are dedicated to pushing the boundaries with lidding film. We have an in-house tactical team that meets wee kly to progress innovations and many contacts and resources, as well as partners at the Rutgers University Food Science Department.

Interested in finding out more? Reach out to us via our online contact form or request a quote here.

For over six years ZEKUN has been helping customers across the world to identify and create the most effective lidding solutions to meet individual packaging needs. Used in a wide range of retail, supermarket and bulk packed tray products, lidding film technology has developed a great deal in recent years, with ZEKUN constantly seeking new and innovative ways to satisfy the most challenging of lidding requirements.

Our current range of lidding films offer a number of distinct advantages, including:

Cost savings – up to 20% saving in tray costs, with removal of rigid lid

Easy first opening

Superior reclosing / resealing functionality

High shrinkage effect


High moisture barrier

Product waste reduction

Designed with the essential strength, peelability, puncture resistance and barrier properties required to maintain peak product freshness; our high quality 8-colour printed films provide great shelf presence and extended shelf life for a variety of ‘easy peel’ or ‘weld seal’ applications.

We have years of experience matching the correct film type with a particular tray material and offer lidding film solutions for a wide range of tray types, including PP, PET, PVC, PS and foil. We can also match your lidding requirements with thermoform, semi-rigid bottom web films.

Complementing established monolayer and laminate solutions for lidding we now offer lidding film for re-closing mono-material trays. European sourced, this film offers optimum machinability and superior reclosing, which is suitable for packaging cheese, meat, ready meals, snacks and confectionary.

The difference and application between three-side sealing bag and back sealing bag

Three-side-seal packaging bags and back-seal bags are very different from the requirements of packaging machine loss according to the shape and weight of the packaging content. The three-side sealing bag, as the name implies, is to seal the three sides of the packaging bag, and load things from the top seal, while the back-seal bag encapsulates the plastic packaging from the middle. The following description of the bag method is based on the packaging mechanism of the two The difference:

1. Back seal bag

Back-seal bag, also called middle-seal bag, is the vocabulary of the packaging industry. Simply put, it is a packaging bag with edge-sealing on the back of the bag. Back-seal bag has a wide range of applications, such as general candy, bagged instant noodles, bagged dairy products, etc. All use this type of packaging.

Compared with other packaging forms, back-seal bags have no edges on both sides of the bag body, so the pattern on the front of the package is complete and more beautiful. At the same time, in the layout design, the bag body pattern can be designed as a whole, which can maintain the continuity of the picture. And because the seal is on the back, both sides of the bag can withstand greater pressure, reducing the possibility of package damage. Moreover, the packaging bag of the same size adopts the form of back seal to seal the smallest total length, which also reduces the probability of seal cracking in a certain sense.

In terms of material, back-sealed bags are no different from general heat-sealed bags. In addition, composite packaging such as aluminum-plastic and aluminum-paper is also widely used in modified packaging. The most common forms of packaging are milk packaging in bags and melon seed packaging in large bags. Back-seal bags also have requirements for the weight of the contents, and should not be too heavy, within 10KG.

Back-seal bags can be used as food bags, and also play a role in the beauty packaging industry, preventing moisture, water, insects, and preventing things from being scattered. Adapt to the packaging requirements of different types of products.

2. Three-side sealing packaging bag

Three-side sealing bag, namely three-side sealing, leaving only one opening for the user to install the product. Three-side sealing bags are the most common way of making bags. The side-sealed bag has the best airtightness, and it is usually necessary to use this bag making method to pull out the real bag.

The main products and characteristics of the three-side sealing bag: plastic food packaging bags, vacuumized nylon bags, rice bags, upright bags, zipper bags, aluminum foil bags, tea bags, candy bags, powder bags, rice bags, cosmetic bags, facial masks and eye masks Bags, medicine bags, pesticide bags, paper-plastic bags, bowl surface sealing film, special-shaped bags, anti-static bags, film rolls and plastic bags for automatic packaging machines. Used for sealing packaging of various consumables such as printers, copiers, etc.; and other bottle sealing films of various conventional materials.

The compound three-side sealing plastic bag has good barrier properties, moisture resistance, low heat sealability, high transparency, and can also be colored by color printing. Commonly used in daily necessities composite packaging bags, cosmetic composite packaging bags, toy composite packaging bags, gift composite packaging bags, hardware composite packaging bags, clothing composite packaging bags, shopping mall composite packaging bags, electronic product composite packaging bags, jewelry composite packaging bags, sports Precision packaging of products in various industries, such as equipment composite packaging bags.

Three-side sealing bags need to be vacuum packed in many cases, and the requirements for use are also very diversified.

Yes, food, cosmetics, industry, etc. can all be involved. The first production process meets most bag-making requirements and reduces loss. It can be used for bag-making machines with small or large door widths, mainly due to the size of the quantity. The three-side sealing bag is to prevent food from spoiling. In order to make the shelf life longer, vacuum packaging is mainly to extract all the air in the bag and then seal it, so that the bag is always in a high-pressure state to reduce the growth of bacteria. Customers can also do it by themselves. Sterilization treatment.

The three-side sealing bag making method has low loss, the temperature is adjusted by PID, adjustable from 0 to 300℃, non-contact automatic control, and centralized setting of man-machine interface. Custom-length bag making, photoelectric tracking bag making. The punching method can be set to continuous, interval, stop, and the punching time can be preset. The double delivery method can be one to six times delivery. The advantages of the packaging machine improve the product grade. The three-side sealing bag has excellent sealing performance, high barrier degree, ultra-low oxygen and moisture permeability, moisture-proof, pollution-proof, radiation-proof and anti-corrosion, strong mechanical properties, bright and practical appearance, non-toxic, and tasteless in line with national standards. It has the characteristics of easy loading and unloading, stacking, handling and storage.

In contrast, the three-side seal bag can be distinguished from the back seal bag at a glance in the edge sealing process, and the three-side seal bag does not have the back seal edge. When in use, the three-side seal bag has better air-tightness and can be used as a food packaging bag that needs to be vacuumed. It can prevent food from spoiling and extend the shelf life of the food; at the same time, the use of the three-side seal bag can reduce packaging materials Attrition rate.

Three-side-sealed packaging bags and back-sealing bags have their own advantages, and Zekun Packaging can fully meet its production process requirements.

Pet food packaging bags are equally important for pets

With the gradual improvement of people’s material life, more and more families keep pets. Outside of busy work, young people hope to heal themselves through the company and play with pets, and also reap the fun of petting cats and dogs. The brand captures this consumer demand and designs ideas driven by market trends , Novelty pet food packaging can quickly attract consumers’ attention. Use quality packaging to satisfy people’s desire for the best products for “children”. As for those who want to keep pets, they should also abandon the three-minute heat. Only when you truly take the responsibility of raising and loving your pet can you live up to the meaning of companionship.

With the gradual development of the global pet food industry, in the established and mature pet markets in North America and Europe, more and more consumers have also noticed that the safety of pet food packaging is not lower than that of pet food raw materials.

This awakening of awareness has also prompted more and more pet food manufacturers and brands to choose more environmentally friendly, high-quality, and safe packaging materials to cooperate with manufacturers. Many American brands, especially those that have pet wet food, have claimed that all their wet food cans do not contain any BHA or BHT or heavy metals.

Today, when pets are getting more and more attention, the packaging of pet food has become particularly important. The quality of pet food packaging bags directly affects the quality of pet food. Zekun Packaging Technology Co., Ltd. tailors the size, shape and material thickness of the packaging bag for pet food products. Welcome to call and submit manuscripts to inquire about custom-made details! The following are the points that need to be paid attention to when customizing pet food for your reference:

1: Size requirements

Whether it is a dog food packaging bag or a cat food packaging bag, the food of each small animal is different, the size of the particles is different, and the weight of each package is also different, so we must first determine the packaging bag Weight, size, so that we can produce a satisfactory product.

2: There are some materials for pet food packaging bags

The main production materials of pet food packaging bags are as follows:

(1) Co-extruded PE film

(2) Woven bag

(3) PP/PE, PE/PE, PET/PE, NY/PE two-layer composite bag

(4) PET/NY/PE, PET/MPET/PE, PET/AL/PE three-layer composite bag

(5) PET/NY/AL/PE, PET/AL/PET/PE four-layer composite bag

(6) PET/NY/AL/RCPP high temperature retort pouched wet grain/soft can packaging

The price of each material is different, and the quality is different, so you need to choose your favorite packaging bag according to the positioning of the product.

3: What are the bag shapes of pet food bags

Pet food bag packaging bag type: flat bottom bag, four-side sealing bag, eight-side sealing bag, self-supporting ziplock bag, etc.

4: The importance of sealability of pet food packaging bags

Pet food also has shelf-life requirements. During the shelf-life, pet food must ensure that it does not deteriorate, taste, or lose nutrients. There are many factors that affect the shelf life, including preservatives, packaging, storage conditions and other factors. Here we must pay attention to the sealing properties of pet food packaging bags.

>>>>>For more details on printing of pet food packaging bags, please consult ZeKun

As the “unplasticized guest” must choose the reusable silicone fresh-keeping bag

Although the editor has been working hard to implement the “plastic reduction action”, I believe that you who love the earth and life are also. But sometimes it is inevitable that disposable plastic bags will still be used

Today, Zekun Packaging strongly recommends a reusable food-grade platinum silicone storage bag, which will make your life a big step towards environmental protection, safety and fashion!

The preservation of food has always been a headache. Especially in summer, the hot weather makes the preservation period of food shorter and more prone to spoilage.

Therefore, the silicone fresh-keeping bag was born. It uses silica gel as the main raw material and is bonded with food-grade fresh-keeping bag glue. It has good sealing and fresh-keeping performance. It can be refrigerated and microwave-heated. The lunch box can be used as a shopping bag to go to the supermarket. It can be reused many times. Therefore, it is deeply loved by middle-aged and young people.

Why are silicone fresh-keeping bags so popular? The most important thing in storing food is health and safety. Silica gel is a high-grade active adsorption material, non-toxic, odorless, and very flexible, while food-grade fresh-keeping bag glue must meet FDA and LFGB certification. The fresh-keeping bag can withstand a high temperature of 218°C and can be boiled. Put some vegetables in the storage bag and cook slowly in the pot, which not only maintains the relative freshness of the vegetables, but also achieves the cooking of the dishes, which can be described as killing two birds with one stone. This is also the unique advantage of this bag. Of course, microwave heating is not a problem. It can be rotated in the microwave oven to lock the moisture of the food and maintain the pure taste of the food, and there is no peculiar smell after heating. Compared with ordinary disposable plastic fresh-keeping bags, it can be washed and used repeatedly, and it can also be put in the dishwasher. The operation is simple, economical and environmentally friendly! Therefore, safety, environmental protection, hygiene, durability and other requirements have been met, and it will be so popular among the people.

The silicone fresh-keeping bag has another mission, to build a plastic-free green earth!

We all know that plastic, as a non-renewable material, is difficult to decompose and will cause global warming and widespread pollution.

It takes at least 500 years for a plastic bag to decompose in the landfill.

If as long as 3% of the world’s population use silicone fresh-keeping storage bags, 219,000,000 plastic bags can be saved every day to contaminate the land!

Whether it is breakfast sandwiches, delicious snacks and snacks that you want to bring to the company on weekdays, or tempting biscuits, various nuts, and fresh cut fruits for a weekend picnic, you can put them in the storage bag. Keep fresh while not afraid of squeezing or scattering, safe and healthy, and unlimited joy.

Can you refuse such a practical silicone fresh-keeping bag?

  Hunan Zekun Packaging Technology Co., Ltd., established in 2015, is a professional modern automation enterprise in the research, development, sale and service of Flexible Plastic food Packages, plastic film roll, zip lock bag, stand up bag, Retort package and spout bag, we using High-end printing inks imported and 100% virgin exclusive formulation material, such as PE, PET, PP, OPP, AL, VMPET, as raw material etc…We are located in Hunan Province. Our company covers an area of 31000 square meters. About equipment, We own modern advanced production equipment, such as computer high-speed 9 colors printing machine with 1.3 meters maximum printing width; Widen large lamination machine; Electric eye folding machine; Full-automatic computer bag-making machine; What is more, we have many years experience in manufacturing plastic packaging bags. Dedicated to strict quality control and thoughtful customer services, we have excellent team who focus on product development & design, quality control & inspection and company operating. In order to supply the best products and services, we have built a modern quality management system which is in strict accordance with international standards. We have exported to all over the world market such as: U. S, U. K, Australia, Canada, Russian, Germany and most of America, Europe, Asia, Middle East countries We are glad to work together with you and finally bring you the satisfied products with common success.

Packaging requirements and storage methods of dried nut products

The shelf life of dry products is greatly affected by packaging, because once the packaging materials or packaging containers are unreasonable, it is easy to cause moisture regain or even agglomeration and mold growth of the dry products, resulting in unnecessary losses. The packaging of dry products should meet the following requirements:

(1) It can prevent the invasion of outside air, dust, insects, rodents, microorganisms, and odors.

(2) Do not penetrate outside light or avoid light.

(3) It has the characteristics of durability and firmness during storage, handling and sales. The packaging container will not be damaged under the conditions of falling from high altitude, high temperature and high humidity, immersion and rain.

(4) The size, shape and appearance of the packaging should be conducive to merchandise sales.

(5) Packaging materials in contact with food should meet food hygiene requirements, be non-toxic and harmless, and will not cause food denaturation or deterioration.

(6) Packaging costs should be low and reasonable.

The preservation of dry products is closely related to food composition, texture, and condition control of the drying process, and packaging containers are also critical to the transportation and storage of dry products.

Cartons and cartons are commonly used packaging containers for dry products, and there are also paper bags, paper cans and other packaging. Most dry products are packed in cartons and lined with moisture-proof packaging materials, such as waxed paper, parchment paper, and heat-sealable high-density polyethylene plastic bags. The cartons are usually color-printed paper, waxed paper, and fibers that can be tightly attached to the box. Film or aluminum foil is used as the outer packaging.

Dry products are often packaged in cellophane, coated cellophane bags, plastic film bags and composite film bags. The use of film materials for packaging occupies a small volume and light weight, and it can be used for vacuum or inert gas packaging. For fragile dry products, inflatable packaging can prevent the dry products from being damaged by pressure during transportation and storage or the packaging bags are pierced by hard dry products, and the packaging loses relevant functions. The aluminum foil in the composite film has the characteristics of being impermeable to light, moisture and oxygen.

Metal cans are ideal containers for packaging dry products. It has the characteristics of sealing, moisture-proof, insect-proof, firmness and durability, and can avoid rupture in a vacuum state, and can protect the dry product from being squeezed by external forces and maintain the original shape.

Glass bottles have high chemical stability, are insect-proof and moisture-proof containers, and some can be vacuum packed. The glass bottle packaging is transparent, allowing you to see the contents, and protect the dried products from being crushed. It can also be processed into brown to avoid light, can be recycled and reused, and can be made into a certain design shape. But glass bottles are easy to break and are heavy.

Talking about the packaging container of candy and chocolate

The role of packaging in candy and chocolate

1. Protect the product’s due luster, fragrance, shape, and extend shelf life

It is very important for candies and chocolate to maintain their proper appearance within a certain period of time. For example, fruit hard candy should have good transparency and corresponding fruit aroma, and the surface of chocolate should have good brightness and cocoa aroma. These qualities are maintained very well. To a large extent depends on the packaging form, packaging material and packaging effectiveness.

All kinds of candies contain different amounts of reducing sugar. This reducing sugar has the property of easily absorbing moisture in the air. Therefore, the candies will absorb moisture to varying degrees in a humid environment. Once the candies absorb moisture After that, it will become sticky (fashang in technical terms) and lose its due transparency.

Chocolate products are heat-sensitive foods and also high-fat products. Therefore, when the indoor temperature exceeds 25°C and reaches 30°C, the product begins to soften. This phenomenon is that some of the low-melting fat contained in the chocolate begins to melt, and the melted fat will migrate to the surface of the chocolate. The migrated fat will not only make the chocolate become It is soft and will make the surface dull, and severely make the product surface blooming and white; in addition, in a humid environment, the sugar contained in the chocolate will also absorb moisture and deliquescence, and the deliquescent sugar will cause the product to become sticky.

2. Prevent microbial and dust pollution, improve product hygiene and safety

Chocolate products are high-protein foods. It is especially important to prevent microbial contamination of praline fillings or brownie products, because protein and the nutrients in chocolate are excellent microbial culture media. If these products are contaminated by bacteria, they should be stored in storage. In the process, it will accelerate the speed of product worms and deterioration, resulting in the loss of commodity value. Therefore, tight packaging can avoid microbial contamination and ensure product hygiene and safety.

3. Exquisite product packaging can increase consumers’ desire to buy and the value of goods

Commodity quality, price, and packaging are the three main factors in market commodity competition. And the packaging design is an important one in the road to the market. Because of the distinctive product packaging design, it will give people a strong visual effect on the shelf and increase consumers’ desire to buy. Therefore, good food must have the three main factors of product quality, price, and packaging, so as to increase the value of the product. From the above points, it can be seen that packaging plays an important role in the quality, hygiene, and price life of candy and chocolate products. Good products must have exquisite and beautiful packaging.

Candy packaging

The traditional candy packaging is wrapped in wax paper. Later, it is gradually changed to cellophane wrapping. Now it is mostly wrapped in plastic film. Plastic film has good moisture resistance, high tensile strength, low price, abundant sources, diverse varieties, good mechanical adaptability, and is suitable for high-speed automated packaging. Commonly used films include HDPE, OPP, BOPP and aluminum foil/PE.

Confectionery packaging has various wrapping forms such as twisted, folded and seamed. Seam wrapping, also known as pillow wrapping, is an advanced candy packaging technology developed in recent years. It is characterized by heat-sealing, good air-tightness, and moisture-proof and moisture-proof for a long time. , Preserving fragrance, its shelf life is greatly improved, and the packaging form is novel, which can save packaging materials.

General candy packaging needs to be printed and decorated, supplemented by exquisite patterns, to enhance the commodity value and attractiveness of the candy. Traditional candy printing is on the reverse side of the wrapping paper. When there is no inner wrapping paper on the candy block or the wrapping paper is skewed and loose, the printing ink will directly contact the candy and cause the ink and residual solvent to contaminate the candy. Therefore, this printing method is not acceptable. Taken. According to food hygiene requirements, after printing, packaging materials are coated with a layer of polyethylene on the printing surface to ensure that the candy packaging is non-toxic, hygienic and the printing decoration is exquisite and bright. The packaging film made by this method can be used on an automatic packaging machine, and can be heat-sealed, moisture-proof and gas-barrier, so it can prolong the shelf life of the candy.

Candies can be packaged in simple packaging, bag packaging, box packaging, metal cans, plastic cans, and paper-plastic combination cans.

Chocolate packaging

1.Basic characteristics of chocolate

Chocolate is made of cocoa products (cocoa mass, cocoa powder, cocoa butter), sugar, dairy products, spices and surfactants as basic raw materials, and undergoes scientific processing such as mixing, fine grinding, refining, temperature adjustment, and molding. , Has a unique color, aroma, taste and fine texture, exquisite, preservation-resistant, high-calorie sweet and solid food.

2. Chocolate requirements for packaging

Chocolate is made from raw materials such as cocoa liquor, cocoa powder, cocoa butter, white sugar, dairy products and food additives, which are processed through processes such as mixing, grinding, scouring, tempering, casting, and freezing. The dispersing system of chocolate uses fats and oils as the dispersing medium, all solid components are dispersed between the fats and oils, and the continuous phase of the fats and oils becomes the skeleton of the physique. The main component of chocolate, cocoa butter, has a melting point of about 33°C. Therefore, chocolate will gradually soften when the temperature reaches 28°C, and gradually melt into a slurry above 35°C. The surface quality of chocolate is also greatly affected by ambient temperature and humidity. When the temperature gradually rises from 25°C to above 30°C, the gloss of the chocolate surface begins to dim and disappear, or when the relative humidity is quite high, the gloss of the chocolate surface will also be dim. And disappear. At the same time, if chocolate is packaged or stored improperly, there will be phenomena such as blooming, whitening, oil leakage and insects. In addition, chocolate also has the characteristics of being easy to absorb the odor of other items, some chocolate products will also have a scent, and the shelf life is not synchronized. Therefore, chocolate has relatively high requirements for packaging. It not only requires the packaging to have good basic properties such as water and gas resistance, temperature and melting resistance, light protection, rancidity resistance, dialysis resistance, mildew resistance, insect resistance, and pollution prevention, and it can also be used for a long time. Maintain the color, aroma, taste and shape of chocolate candies.In addition, with the needs of market competition, packaging requires unique forms of expression (including materials, shapes and designs, etc.), rich and colorful content (showing product form, features, and connotation, etc.) and value-added functions to promote products. Sales and increase the added value of products.

3. Commonly used chocolate packaging materials

(1) Paper products. Paper product packaging is a world-recognized non-polluting and environmentally friendly material, but due to its own characteristics, it is generally used for outer packaging, display packaging, display packaging and transportation packaging. Chocolate paper packaging involves coated paper, white cardboard, grayboard, boxboard and corrugated paper. The proportion of high value-added functional papers such as water resistance, oil resistance, acid resistance, deodorization, and wafer paper is gradually increasing.

(2) Tin foil packaging. This is a type of traditional packaging material. Because of its good barrier properties and ductility, it has always occupied a place in the current chocolate packaging. However, it is affected by factors such as production technology, production efficiency, application limitations, and price, and is affected by packaging such as plastics. Great impact.

(3) Plastic flexible packaging. Plastic packaging has gradually become one of the most important packaging materials for chocolate due to its rich functions and diverse display power. With the maturity of technology, cold-seal soft bags have gradually become the most important part of chocolate due to their high packaging speed, low odor, no pollution, easy tearing, etc., and can avoid the impact of high temperature during the chocolate packaging process. Packaging Materials.

(4) Composite materials. Due to the composite characteristics of multiple materials and obvious protective display capabilities, composite materials are easy to obtain materials, simple to process, strong composite layers, and low consumption, and gradually become a commonly used packaging material in chocolate and candies. Most of the composite materials are based on flexible packaging. Currently, commonly used materials include paper-plastic composite, aluminum-plastic composite, and paper-aluminum composite.

(5) Container packaging. Container packaging is also one of the most common packaging methods in chocolate packaging. It mainly has the advantages of excellent protective performance, sophisticated production, unique display effect and reusability. At present, the common container packaging on the market is nothing more than plastic (injection molding, blow molding, blister molding), metal (tinplate cans, aluminum cans), glass and paper (mounted boxes) four categories, in order to pursue the differentiation of product display, Containers such as leather boxes, wooden boxes and composite materials that do not often contain food are also appearing on the market. In addition, ceramic materials can fully express culture and art, and there have been cases in the market that use ceramics to make high-end chocolate packaging containers.

Analyze the characteristics and applications of four-side sealing bags

The four-side sealing bag contains four sealing edges, which are like two pieces of film facing together to seal the four sides. This is the source of the four-side sealing bag.

1. Features of the four-side sealing bag:

(1) The product has a good appearance and three-dimensional effect. The product is packed in a cube shape, which can be used for food preservation, and it can be recycled many times to make full use of the packaging bag space.

(2) The unique four-side sealing bag design can effectively prevent bursting. The new printing process highlights the pattern design and trademark effect. Special trademarks or patterns can be designed to have a good anti-counterfeiting effect.

(3) It can highlight the high-grade and distinctive shelf effects of products.

(4) It has a wide variety of styles, and is resistant to cooking, moisture-proof, good vacuum effect, low oxygen permeability, high sealing performance and good heat sealing performance.

(5) Strong resistance to irritation, prevent external lines, especially anti-static, etc., which effectively protect the product from damage caused by the external environment, and extend the shelf life.

2. The main products of four-side sealing bags include:

(1) OPP, CPP, PET, nylon, aluminized and other composite bags;

(2) Blank or multi-color sling bags, self-adhesive bags such as OPP, CPE, PP, PE, PP;

(3) Courier bags of various sizes, such as PE, PP, PO, OPP, CPP, etc., flat pocket organ bags;

(4) A series of design and manufacture of PVC handle bags, zipper bags, environmental protection bags, etc.

3. The scope of application of products with four-side sealing bags:

Four-side-sealed bags are usually used in developing countries such as Central and South Asia. They are mainly used for powdered food, dried fruits and tea. The food that needs to be stored is put in the bag. Some foods require the air to be exhausted, so as to be hygienic, environmentally friendly and extendable. The shelf life and other functions are widely used in snack food packaging, powder food packaging, and food production enterprise packaging.

There is still a big difference between a four-side seal bag and a three-side seal bag in the usual sense, but the origin of such a product naming can be simply understood from the literal sense. Not only that, in terms of application, there is not so much difference between the two products. Like a three-sided sealing bag, it can also be applied to food bags and cosmetic packaging. The two still have the same place in this respect. For more information about the four-side sealing bag, please consult Zekun Packaging: https://www.zekunpackaging.net

Emails: Dreamzekunpackaging@gmail.com Whatsapp 008613926043818

Packaging bag printing price calculation method

How to calculate the printing price of packaging bags?

1. First of all, you need to know what material your packaging bag is made of and how many layers of materials are it made of?

2. Then determine the width, height and thickness of the packaging bag. If you need to customize a three-side-sealed dried fruit packaging bag with a weight of about 80g, I suggest you use a food packaging bag of about 8c (c is the thickness unit, 1c=0.01mm ).

3. Then the printing price of the food bag can be calculated more clearly.

Price = first layer material (length * width * thickness * unit price of material) + second material (length * width * thickness * unit price of material) + third material (length * width * thickness * unit price of material) + Consumed ink price + consumed glue price + labor cost + manufacturer profit

The price of the packaging bag is determined according to different materials. For details, please consult Zekun Packaging Customer Service.

Remember, the price calculation method is different for each type of bag, but the general idea is that the price is also related to the typesetting. Therefore, the price is still determined by professionals. Come calculate it for you as well.