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Public Participation Announcement for the Environmental Impact Assessment of the Fully Automated Printing and Packaging Materials Clean Production Line Project

Public Participation Announcement for the Environmental Impact Assessment of the Fully Automated Printing and Packaging Materials Clean Production Line Project

2022-06-14

In accordance with the requirements of the "Environmental Impact Assessment Law of the People's Republic of China" and the "Public Participation in Environmental Impact Assessment Measures", a public participation process for the environmental impact assessment of the "Fully Automatic Printing and Packaging Material Clean Production Line Project" needs to be carried out to understand the public's attitude towards the project construction and their opinions and suggestions on environmental protection, and to accept public supervision.

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Understanding the production process and key points of stand-up pouches

Understanding the production process and key points of stand-up pouches

2022-05-17

I. Production Procedures 1. Preparation: Install the horizontal heat-sealing knife, bottom heat-sealing knife, and reinforced heat-sealing knife. Install the punching device. 2. Film threading, EPC setting, aligning the bag edge and pattern. 3. Adjust the bottom heat-sealing knife, input the length dimension. The knife position and direction must be aligned. Adjust the knife using the upper knife as a reference. Check if the round hole is round. Set the photoelectric sensor. 4. Install the bottom film and adjust it to the middle fold. Adjust the bottom film punching. 5. Adjust the horizontal heat sealing to align the heat sealing knife position with the printing position. 6. Adjust the reinforced heat sealing block to apply pressure at the four-layer intersection. 7. Adjust the cutting knife and the edge material cutting device. 8. Confirm and adjust the bottom punching position and bottom heat sealing position. Confirm and adjust the position of the horizontal heat sealing knife and the reinforced heat sealing block. Confirm the heat sealing strength and adjust the heat sealing temperature. II. Production Key Points 1. The bottom film tension should not be too high. If the tension is too high, the round holes on the bottom will deform. The general tension is 0.05~0.2 MPa. 2. For the first set of heat-sealing knives, use higher pressure and lower temperature. For the second and third sets, use normal temperature and pressure. 3. Adjust the spring pressure of the reinforced heat-sealing block to zero, allowing only the self-weight of the heat-sealing device to take effect. 4. Generally, use 50° hardness silicone rubber plates. Use 70° plates when the heat-sealing area is smaller. 5. When heat sealing, if the bottom round hole becomes elliptical, increase the waiting time by 100 minutes. 6. The bag making speed is generally 50~100 bags/minute. Hopefully, the above understanding of stand-up pouches from the editor will be helpful to you.

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Precautions for high-temperature steaming bag production process

Precautions for high-temperature steaming bag production process

2022-05-17

1. Balanced substrate thickness, good corona treatment effect, and high heat shrinkage resistance. Commonly used high-temperature retort pouch substrates include PET, NY, Al, and RCPP. The corona treatment effect of these substrates directly affects the composite strength of the high-temperature retort pouch; during the high-temperature retort process, the substrates will shrink to varying degrees. If the corona treatment of the material does not achieve the expected effect, the composite strength is low, and there is not enough force between the layers of the composite bag to prevent substrate shrinkage, resulting in severe delamination of the bag layers after high-temperature retorting. Generally, the surface tension of PET and NY used for high-temperature retort pouches should reach 50 mN/m, and RCPP should reach 40-42 mN/m. In addition, some additives in the substrate, such as anti-blocking agents, anti-slip agents, and antistatic agents, accelerate release to the surface at high temperatures, which may lead to a decrease in adhesion. Since high-temperature retort pouches are basically in water during the sterilization process, when measuring the substrate shrinkage rate, the substrate shrinkage rate should be measured at 120℃ for 30 min. The shrinkage rate should be small and stable, especially for BOPA film, RCPP film, and SCPP film. The longitudinal and transverse moisture-proof shrinkage rate is recommended not to exceed 1.5% before it can be called a retort-grade film. The balanced thickness of each layer of the material should be uniform, and the thickness deviation should not exceed 7%, and the physical and mechanical performance indicators should meet the requirements. For aluminum foil products, in addition to their mechanical performance parameters, the surface of the aluminum must be dry, and the cleanliness of A and B must meet the standards, that is, they must be wet when checked with distilled water, and the number of pores must be as small as possible. Well, the storage time before use should not exceed three months. To improve the composite strength, the BOPA in the middle composite should use double-sided corona treatment, and the corona value should not be less than 50 dynes. 2. Compatibility of cooking inks, adhesives, and substrates The production of composite packaging bags is a process of superimposing the various properties of various materials, so it requires that the substrates, inks, adhesives, etc., have good compatibility and high temperature, humidity, and heat resistance. The degree of matching between them is very important. If the matching is not good, the processed products may have poor appearance or delamination during the retorting process. According to the adhesion theory, when the adhesive and the adherend have the same surface tension and the same polarity, the interfacial tension is minimized, and the adhesion strength is the highest. Therefore, the surface condition of the ink and adhesive after curing and film formation and the surface condition of the printing substrate may vary depending on the manufacturer's products. Whether the groups on different surfaces can be attracted to form intermolecular forces or chemical reactions to form chemical bonds. It determines whether various surfaces have good adhesion. Therefore, when making retort pouches, the resin type of ink and adhesive should be fully considered to avoid poor overall performance of the retort pouch due to incompatibility between ink, adhesive, and printing substrate. The inks or adhesives used for high-temperature retort pouches are generally two-component polyurethane resin types. The heat resistance of inks or adhesives mainly depends on the heat resistance and moisture resistance of the polyurethane resin. High temperature improves the reaction characteristics of ink and adhesive. If the heat resistance and moisture resistance of the ink and adhesive are insufficient, hydrolysis will occur at high temperatures, and the composite strength will decrease. From the characteristics of the polyurethane resin system, the amino and ester groups in the resin have strong polarity and are easily eroded and hydrolyzed by moisture under wet heat conditions. The hydrogen bonds between the polyurethane resin and the substrate surface are easily broken, reducing the bonding strength and even causing the bonding layer to peel off. At present, the inks and adhesives used for high-temperature retort pouches are modified with resins or additives to improve the adhesion and heat resistance of the inks and adhesives. Therefore, the quality of the modified resin used in the ink and adhesive determines the quality of the ink and adhesive. Select RCPP and SCPP for the heat-sealing layer according to different retort temperatures. RCPP or SCPP is usually used as a heat-sealing material above 121℃, and the thickness must be greater than 60 μm. It is generally recommended to use imported products. The inner layer of imported RCPP contains rubber components, which are block copolymers and impact-resistant polypropylene. 3. Control of curing time and adhesive application amount Due to the special sterilization method and use conditions of high-temperature retort pouches, high-temperature retort pouches need to have good composite strength to reduce the influence of wet heat conditions on the quality of high-temperature retort pouches, and the composite strength is closely related to the adhesive application amount and curing time. The adhesive application amount of high-temperature retort pouches generally needs to reach more than 4 g/m2; the curing time is another important factor affecting the composite strength. The curing time of high-temperature retort pouches generally needs to reach more than 72 h. Sometimes, although this time is not reached, the adhesive layer is dry after the bag is peeled off, and the curing seems to be complete. However, in the actual high-temperature processing process, due to the residual stress inside, it will still be far different from the product with sufficient curing time in terms of heat resistance and moisture resistance, and in the subsequent bag-making process, it is easy to produce heat-induced delamination. Therefore, in the production process of high-temperature retort pouches, we should not blindly pursue speed, but should prioritize the quality of high-temperature retort pouches and strictly follow the process requirements for production. 4. Gold and silver inks are not suitable for high-temperature retort pouches Gold and silver inks are very prone to penetration of pigments, such as crimson, bright blue, and purple inks. When they encounter water and the temperature is high, dissolution is certain. The copper powder and aluminum powder used in gold and silver inks are metals with relatively high activity, and they are easily chemically reacted with water, oil, and oxygen at high temperatures. After oxidation reaction, the appearance shows blackening, greening, or even fading. Therefore, gold and silver inks and inks that are prone to penetration cannot be used for high-temperature retort pouch products.

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Advantages of Spout Pouch Packaging

Advantages of Spout Pouch Packaging

2022-05-17

Spout pouches are a type of liquid packaging that replaces rigid packaging with flexible packaging. The structure of a spout pouch mainly consists of two parts: a spout and a self-supporting pouch. The stand-up pouch is made of multi-layer composite plastic materials to meet the requirements of different food packaging properties and barrier properties. The spout part can be regarded as an ordinary bottle mouth with a cap screwed on. The two parts are tightly bonded by heat sealing (PE or PP) to form a squeezed, sucked, poured, or pressed liquid package, which is a very ideal new type of liquid packaging. Compared with ordinary packaging forms, the biggest advantage of spout pouches is their portability. Spout pouches can be easily placed in backpacks or even pockets, and their volume can be reduced as the contents decrease, making them more convenient to carry. The soft drink packaging on the market mainly includes PET bottles, composite aluminum foil bags, and cans. In today's increasingly obvious homogenized competition, packaging improvement is undoubtedly one of the powerful means of differentiated competition. Spout pouches combine the reusable packaging of PET bottles and the fashion of composite aluminum foil bags. At the same time, it also has unparalleled advantages in printing performance compared with traditional beverage packaging. Due to the basic shape of the self-supporting pouch, the spout pouch has a significantly larger display area than PET bottles and better than non-stand-up Tetra Paks. It can be sterilized at high temperatures and has a long shelf life. It is also made of single recyclable low-carbon composite materials, making it the ideal sustainable solution for liquid packaging. It has unique advantages and wider applications in the fields of juice, dairy products, soy milk, vegetable oil, health drinks, jelly foods, pet food, food additives, traditional Chinese medicine, daily chemical products, and cosmetics.

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Future prospects of self-supporting bags

Future prospects of self-supporting bags

2022-05-17

People's purchasing power for fast-moving consumer goods (FMCG) is also increasing, and the rapid development of the FMCG market has also driven the rise of the food packaging industry. Today, the types and uses of food packaging are very extensive. Good packaging can establish a high-quality image for products, enhance product competitiveness, and promote product sales. There are many ways to classify food packaging. If classified by technology, it can be divided into: moisture-proof packaging, waterproof packaging, mildew-proof packaging, fresh-keeping packaging, quick-frozen packaging, breathable packaging, microwave sterilization packaging, aseptic packaging, gas-filled packaging, vacuum packaging, deoxygenation packaging, blister packaging, close-fitting packaging, stretch packaging, retort pouch packaging, etc. All of the above packaging is made of different composite materials, and its packaging characteristics meet the requirements of different foods, effectively maintaining the quality and stable functions of the food itself. Among them, stand-up pouches are considered one of the classics of modern packaging and are also a relatively novel form of packaging. They have advantages in many aspects, such as enhancing product grade, strengthening shelf visual effects, being lightweight and easy to carry, convenient to use, waterproof, moisture-proof, oxidation-proof, and sealable. There are five types: ordinary stand-up pouches, stand-up pouches with spouts, stand-up pouches with zippers, spout-shaped stand-up pouches, and irregularly shaped stand-up pouches. They are mainly used in products such as juice drinks, sports drinks, bottled drinking water, suckable jelly, and seasonings. In addition to the food industry, their applications in some cleaning products, daily cosmetics, and medical supplies are also gradually increasing. Stand-up pouch packaging is very convenient for shoppers: because it is soft plastic packaging, it is lightweight and not easily damaged, shopping bags will not be torn by hard packaging, and it is easier to dispose of than bottles. In addition, stand-up pouches with zippers can be refilled; stand-up pouches with spouts make food easier to pour; perfect printing quality can help retailers attract consumers' attention; stand-up pouches, cans, and packaging are subject to fewer regulations, etc. Current stand-up pouch technology can already realize many dreams, which is a great market opportunity for soft plastic manufacturers. Industry insiders also point out that with the introduction of high-capacity automated bagging equipment, the development potential of flexible packaging bags is becoming increasingly large. Spout pouches became popular in the 1990s. They are flexible packaging bags with a horizontal support structure at the bottom and a spout at the top or side. They can stand upright without relying on any support, so they are named spout stand-up pouches. It is a relatively novel form of packaging, with advantages in enhancing product grade, strengthening shelf visual effects, being lightweight and easy to carry, convenient to use, fresh-keeping, and sealable. Stand-up pouches are laminated from PET/foil/PET/PE structures, and can also have 2 layers, 3 layers, or other specifications and materials, depending on the different products being packaged. An oxygen-barrier protective layer can be added as needed to reduce oxygen permeability and extend the shelf life of the product. Ordinary stand-up pouches and general forms of stand-up pouches use a four-side sealing method, which cannot be resealed and reopened; stand-up pouches with spouts are more convenient for pouring or sucking out the contents, and can be resealed and reopened, which can be considered a combination of stand-up pouches and ordinary bottle mouths; spout-shaped stand-up pouches combine the convenience of stand-up pouches with spouts and the low cost of ordinary stand-up pouches, that is, the spout function is achieved through the shape of the pouch itself, but spout-shaped stand-up pouches cannot be resealed; irregularly shaped stand-up pouches are various new types of stand-up pouches with different shapes based on traditional pouch shapes according to packaging needs, such as waist-in design, bottom deformation design, handle design, etc., which is the main direction of value-added development of current stand-up pouches. Stand-up pouch packaging is widely used in soy milk products. Compared with other packaging, stand-up pouch packaging is clean and convenient. You can open it when you want to drink it, and if you don't want to drink it, you can tighten it without wasting it. Moreover, it can meet different sterilization and preservation conditions in soy milk production, with a shelf life of 3-5 days under refrigeration and about 1 month under normal temperature. At the same time, breakfast soy milk and freshly made soy milk are also starting to use stand-up pouch packaging.

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Stand-up pouches and zipper bags are favored by food companies.

Stand-up pouches and zipper bags are favored by food companies.

2022-05-17

Food packaging not only carries the mission of containing and protecting food, but should also provide consumers with maximum convenience and ease of use while minimizing environmental impact. Xiangwei Packaging recommends two types of food packaging to various food companies: stand-up pouches and zipper pouches. These two types of packaging have been favored in the food packaging field in recent years due to their convenience, ease of use, excellent shelf display, and environmental friendliness. 1. Stand-up Pouches A stand-up pouch is a flexible packaging bag with a horizontal support structure at the bottom. It does not require any support and can stand upright whether the bag is open or closed. Stand-up pouches have excellent shelf display. Furthermore, to meet the needs of individual consumers, stand-up pouches can also add personalized design elements such as handles, curved outlines, and resealable zippers, greatly enhancing consumer desire to purchase. Currently, stand-up pouches are widely used in the packaging of food, juice drinks, smoked jellies, seasonings, pet food, etc. 2. Zipper Pouches A zipper pouch is a flexible packaging bag with an added zipper, allowing for resealing of the packaging. This allows consumers to reseal uneaten food. In developed countries and regions such as Europe and America, zipper pouches have been widely used in the packaging of meat, cheese, frozen foods, nuts, candies, pastries, and other foods. Currently, our company's zipper pouches are mainly used in the fields of betel nut and tea. Zipper pouches used for food packaging mainly include three series: compression type, slider type, and zipper strip type. Although stand-up pouches and zipper pouches have a relatively short history of development in China, they have shown a good development trend. We have reason to believe that in the near future, these two forms of flexible packaging will be increasingly widely used in the food packaging field.

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