Bags used for vacuum packaging often have the following characteristics:
1. Strong mechanical properties, explosion-proof and tear-proof;
2. Barrier air can prevent water and moisture;
3. Non-toxic, tasteless and harmless, in line with food and drug use standards;
4. Can withstand high and low temperature and oil.
The following is a brief introduction to the packaging films of different materials common on the market:
1. PE: polyethylene, a polymer formed by polymerizing ethylene. Polyethylene is a typical thermoplastic, a white powder that is odorless,tasteless, and nontoxic, and is suitable for use in low temperature environments;
2. Al: The aluminum foil film has good barrier properties, can block light, and is suitable for products to be protected from light;
3. RCPP: polypropylene cast high-temperature cooking-resistant film, has good high temperature resistance, is not easy to deform at high temperature, and has excellent puncture resistance and impact resistance. Commonly used for cooking food, medicine packaging, often combined with nylon film or polyester film to package soup or meat products;
4. PET: high temperature resistant polyester film with good mechanical properties and good printing effect.
The above are just a few of the more common vacuum packaging bag materials. Actually, the most suitable packaging material should be selected according to the product.