Food packaging favours cooking bags

The cooking bag is a composite film food packaging bag that can be sterilized at high temperatures and was first developed by the United States to meet the needs of astronauts. In the 1960s, Japan's Toyo Can Corporation obtained patent licenses to achieve mass production. At present, Japan only consumes 500 million retort bags every year. The United States, Germany, and other countries are also growing at a rate of 10% to 20% each year.

Compared with glass and metal packaging containers, cooking bags can also be sealed and sterilized, and the seal is firm, easy to open, beautiful decoration, light weight, good impact resistance, and convenient transportation and carrying.

According to sterilization temperature and shelf life, cooking bags are divided into ordinary sterilizing bags and ultra-high temperature sterilizing bags. Ordinary bactericidal bags are usually heat-sterilized below 120°C, and are mostly made of two- to three-layer composite materials. The shelf life of food is more than six months. Ultra-high temperature sterilization bags are generally sterilized at 135°C, and the bag-making materials are usually more than three layers with aluminum foil sandwiched therebetween. The shelf life is 1 to 2 years. Some also use four or five layers of composite materials.

The retort pouch outer layer material mostly uses the polyester film, the thickness is 10~16μm, plays the reinforcement and the high temperature effect; The middle layer material is the aluminum foil of 11~12μm, the main function is isolates the gas and the moisture and shades the light; The inner layer material is uses for cooking The bag is in direct contact with the food and heat sealed, so the requirements for the inner layer material must not only meet the packaging hygiene standards, but also require stable chemical properties, generally using non-toxic polypropylene, thickness 70 ~ 80μm; can also be used HDPE and other poly Olefin film.

Currently, cooking bags are mainly used to package canned foods, and are also used in Japan and Western Europe for packaging beverages, juices, and the like. In China, with the improvement of people's living standards, the requirements for the safety of food packaging are getting higher and higher, and the cooking package food packaging will also usher in a period of rapid development.