Cooking bags will become the mainstream of food packaging products
Release time:
2019-04-05 12:32
Source:
Ordinary sterilization bags are generally heated below 120 ℃, mostly made of two to three layers of composite materials. The shelf life of food is more than half a year. Ultra-high temperature sterilization bags are generally sterilized at 135 ℃, bag making materials are more than three layers, with aluminum foil in the middle, and the shelf life is 1-2 years. Some are also produced using 4. five-layer composites. The outer material of the cooking bag is mostly polyester film with a thickness of 10-16 microns, which plays the role of reinforcement and high temperature resistance. The middle layer material is aluminum foil of 11-12 microns, which is mainly used to isolate gas and moisture and shield light. The inner layer material is used as a direct contact food and heat seal in the cooking bag. Therefore, the requirements for the inner layer material must not only meet the packaging hygiene standards, but also require stable chemical properties. Generally, non-toxic polypropylene is used, thickness of 70-80 microns, can also use HDPE and other polyolefin film. At present, cooking bags are mainly used for packaging canned food, and are also used for packaging beverages and fruit juices in Japan and Western Europe. In our country, with the improvement of people's living standards, the safety requirements of food packaging are getting higher and higher, and the food packaging of retort bags will also usher in a period of rapid development.
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