Can all vacuum bags be heated?

The application of vacuum packaging bags has become more and more widespread. Because of its superior packaging performance, vacuum packaging bags are deeply loved by food manufacturers. Vacuum packaging bags are often used for packaging meat, vegetables, cooked food and preserved products. High temperature resistance, high temperature sterilization, extending the shelf life of food, maintaining the original taste of food, etc. These propaganda slogans are all about vacuum bags. Can vacuum bags seen in daily life be able to withstand high temperatures? Let me introduce it to you.

Vacuum food packaging bags are also called decompression packaging. All the air in the packaging container is taken out and sealed to maintain a high degree of pressure reduction in the bag. The rare air is equivalent to a low oxygen effect, so that microorganisms have no living conditions to achieve freshness and freshness of the fruit. The purpose of no disease and rot occurs. Since fruits are fresh and live food, they are still undergoing respiration, and high levels of hypoxia can cause physiological diseases. Therefore, fewer fruits use vacuum packaging.

In addition to the oxygen-removing and quality-preserving functions of vacuum packaging, the main functions of vacuum food packaging include compression resistance, gas barrier, and freshness preservation, which can more effectively maintain the original color, aroma, taste, shape and shape of food for a long time. Nutritional value.

But not all vacuum food packaging bags can be directly heated, which has a great influence on the material and manufacturing process of the vacuum bag. General vacuum packaging bags only have a vacuum effect. Some materials, such as high-temperature cooking bags, can be heated at high temperatures, such as CPP, and some materials, such as PE, have bottom-temperature resistance and can be stored in cold storage. The vacuum bag is a composite packaging bag made of various composite materials with two or more layers of composite film that can be vacuumed. The vacuum packaging materials are generally PET/PE PA/PE PA/CPP. The PET material composite can be vacuumed. PET The material is relatively brittle, and the PE/PA has good vacuuming properties. It can withstand high temperatures for high-temperature cooking within 100 degrees Celsius, and refrigerate at minus 30 degrees Celsius. The vacuum cooking bag made of PA/CPP material can withstand high temperature cooking below 120 degrees Celsius, and refrigerate at low temperature of minus 30 degrees Celsius.

Next, let me introduce to you what are the hazards of food packaging bags to the human body? Some illegal businesses use waste plastic to make plastic bags. The main component of waste plastic is polyvinyl chloride. If it does not comply with national regulations or seriously exceeds the standard during processing, The combination of inferior additives can produce strong carcinogens. Using such plastic bags to package food, fruits and vegetables, harmful substances will be adsorbed on the food, even if it is washed, it is difficult to remove. If you use polyvinyl chloride plastic bags to hold food above 50-60°C, the lead in the bag will dissolve into the food, and the plastic bag will also release toxic gases and intrude into the food. Long-term ingestion by the human body will seriously damage the body's health and lead to disease.

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