Analysis on the packaging of the hottest Kawasaki

2022-08-22
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Analysis of Kawasaki Zhonghua Bento packaging

as the saying goes, "buy a layer of skin.". The so-called "skin" refers to the packaging of products. In the whole sentence, it means that if goods are to sell well, they must pay attention to packaging. Kawasaki products have many categories and various packaging, including bottled, boxed, canned, bagged, bowl, strip, promotional, etc. Faced with a variety of packaging, Kawasaki has its own selection principle: "scientific, novel, practical, hygienic and beautiful"

for food factories, the choice of packaging should take into account the safety performance of packaging, which is directly related to the safety of packaged food and the health and safety of consumers after purchase and consumption. Any omission or defect will cause adverse consequences and losses. In addition, when choosing packaging, we should also consider the crucial role of packaging in protecting and beautifying goods, as well as the matching of packaging materials, packaging forms, packaging technology, packaging machinery, packaging environment and corresponding packaging. At the same time, we should also consider the applicability of packaging to build a national carbon fiber technology innovation center. Kawasaki has successfully developed the product packaging of "Zhonghua Bento" according to the packaging selection principle of "scientific, novel, practical, hygienic and beautiful"

"Chinese Bento" is a ready to eat convenience food with Chinese traditional cultural characteristics developed by Kawasaki company with independent intellectual property rights. It comprehensively applies advanced food processing and production technology and packaging engineering production technology, without adding any preservatives, so that the products can be stored for 6-10 months at room temperature. Therefore, once launched, it is deeply welcomed and loved, and the products have been sold at home and abroad

"Zhonghua Bento" has a unique package, which is composed of plastic bowls, plastic covers, sealing films, shrink sleeves, paper labels and attached plastic spoons. Every component of packaging is very important and closely related to food safety. The company has not ignored it because of its small size. The company should strictly control the selection of packaging materials and packaging processing. The most critical part of packaging also lies in plastic bowls and sealing films. The plastic bowl and sealing film of "Zhonghua Bento" are mainly introduced below

"Zhonghua Bento" plastic bowl production technology and food safety

Kawasaki "Zhonghua Bento" packaging - plastic bowl as a packaging carrier is very important. The packed contents are in close contact with the plastic bowl, which is made of polypropylene, polyethylene, White Masterbatch and other chemical raw materials mixed by injection molding. Plastics produced from non food grade or non-conforming raw materials still need to enter the windows bowl through a series of operations, and there are often harmful components in varying degrees that will penetrate, diffuse and dissolve into food. In particular, the high-temperature sterilization in the production process, the violent shaking in the transportation process, the long-term standing on the inventory storage, and the heating of the packaging when consumers use will aggravate the exudation and volatilization of these harmful ingredients. The light will make the packaged food permeate with peculiar smell, and the heavy will permeate with toxic and harmful substances, endangering the health of consumers. Therefore, we will purchase PP, PE and white masterbatches, the raw and auxiliary materials for the production of plastic bowls. PP, PE and white masterbatches must be food grade, and each batch must be inspected with certificates. The raw materials comply with the provisions of GB, GB and GB respectively (that is, the hygienic standard for polypropylene resin for food packaging, the hygienic standard for polyethylene for food packaging, and the hygienic standard for the use of additives for food utensils and packaging materials)

the molded plastic bowl is pure white, with uniform color, no peculiar smell, flat bowl mouth, no burrs, no bubbles, no dirt, black spots, impurities, no waste edges, and no adhesion. It is particularly important to ensure the flatness of bowl mouth, which is closely related to the quality of heat sealing after future production and filling. In addition to our own routine inspection, plastic bowl shaped products are sent to the professional inspection department designated by the state for type test once a year. The type test is in accordance with gb/t5009 (hygienic standard analytical method for polyethylene, polystyrene and polypropylene molded products for food packaging). Generally, the type test is conducted once a year, but it should also be conducted under one of the following circumstances: A. type approval of new products; b. Change the main raw and auxiliary materials and key processes; c. Resume production after stopping production for more than half a year; d. When the national quality supervision department puts forward the requirements for type test

the plastic bowl of "Zhonghua Bento" is produced according to the process and technical documents approved by the specified procedures, and there are specific provisions and allowable deviation ranges for the external size, standard weight, wall thickness and capacity, which ensures the reliability of filling and sealing, high-temperature sterilization and other links when the plastic bowl enters the production line in the future, as well as the reliability of product air tightness and corresponding shelf life

"Zhonghua Bento" high temperature cooking film and its printing problems

Kawasaki "Zhonghua Bento" production is a one-time continuous assembly line production, which is sealed immediately after filling. The sealing film used for sealing is not a general plastic film, but a composite film resistant to high temperature cooking. Considering that some consumers may use microwave oven to heat after purchasing "Zhonghua Bento", aluminum film is not used in the plastic film, but pet/only/rcpp three-layer composite film is used. The surface layer is rigid polyester, the middle layer is flexible nylon, and the inner layer is special polypropylene. The thickness of the whole composite film is about 10 wires. After testing, the air permeability and moisture permeability are close to 0. It has good air tightness and protection, which is a reliable and important guarantee for extending the shelf life of "Zhonghua Bento"

there are two problems with the use of high-temperature cooking film. One is that some people on the Internet are afraid of the high temperature. They say that Yinxi is causing stratification after rubbing the hot cooking; Second, fear of full-scale (or large-area) printing. The operating temperature of "Zhonghua Bento" is 121 ℃, and the time is up to 50 minutes. High temperature cooking film is a kind of composite film, and the film is bonded with adhesive. The cured adhesive is easy to decompose and weaken under high temperature and high pressure, thus losing its viscosity, resulting in peeling and delamination of the composite film. Therefore, the requirements for high temperature cooking film and film suppliers are very high. The cooling after production adopts natural cooling rather than other cooling methods, and natural cooling will not cause damage to the membrane

after printing, the high-temperature cooking film will make it more beautiful and commercialized. However, due to the limitations of materials and technologies (high-temperature ink, film processing technology, etc.), the printing of cooking film with long cooking time and high processing temperature is cautious at home and abroad. Generally, the conservative method is adopted, that is, only a small amount of simple printing on the high-temperature film (less printing part, more blank around) or not printing at all, and the outer bag is used outside, On the outer bag is a beautiful full page printing, highlighting the product effect. So what is the risk of high temperature cooking film printing? Let's take a look:

the risk of high-temperature cooking film printing mainly lies in the fact that the printing ink is easy to decompose under high temperature and high pressure, resulting in delamination of materials, even for high-temperature resistant inks. This starts with the ink printing structure:

it can be seen that the printing film actually has six layers. The ink is printed on the opposite side of the surface polyester film, and then bonded with the nylon film through adhesive

generally, the inks for printing (plastic gravure) layered patterns are overprinted from deep to shallow. The decomposition of any kind of ink will cause peeling hazards to varying degrees, and finally will cause peeling with the surface polyester film. The more color, the wider the color surface, the greater the risk

in addition, when the film is heat sealed with the bowl, the hot cover is more likely to cause the decomposition of the ink layer due to heating and pressure, resulting in delamination, so the printing of high-temperature cooking film (bag) is generally left blank at the heat seal (i.e. transparent, no ink)

leaders at all levels of Kawasaki company attach great importance to product quality management. The company has a strict quality management system and has passed ISO quality system certification and HACCP safety certification. Kawasaki has always been committed to developing healthy food with Chinese characteristics. Of course, safe and healthy food cannot be separated from safe and excellent food packaging. Therefore, we will continue to pay attention to food packaging safety and provide consumers with safe, hygienic and delicious healthy food

source: industrial packaging Solutions

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