Wood grain film manufacturers summarize the materials of common food packaging films

With the development of packaging technology, a large number of high-barrier plastic packaging that can ensure quality, freshness, flavor and extended shelf life are used in the food packaging industry, especially composite films (bags) are widely used in tea, milk powder, steamed food , beverages, meat and milk packaging. Today, wood grain film manufacturers will summarize the materials of common food packaging films for you. 1. Polyethylene (PE) The transparency of polyethylene is not high, and it has certain air permeability, tensile strength and tear strength, as well as certain flexibility and good moisture resistance. Good chemical stability, is a non-toxic packaging material. Therefore, it is often used in the heat sealing layer and moisture-proof coating of composite materials. 2. Polyester (PET) is commonly known as polyester. High transparency and good gloss. It has excellent gas barrier, oil barrier and fragrance retention properties. Rigid and tough, high tensile strength. Good chemical stability, resistant to alkene acid and alkali. The temperature range used is wide, the normal operating temperature range is -70 ℃ ~ 120 ℃, and it can be used for a period of time at 150 ℃. Good hygiene and safety. It is widely used in poultry meat packaging. The composite film based on PET can be used for retort food packaging. 3. Polypropylene (PP) Polypropylene is polymerized from propylene. It is a very light plastic with good transparency and gloss, good physical and mechanical properties such as tensile strength, hardness and toughness, and good heat resistance. , can be used continuously at a high temperature of 120 ° C, and can be cooked in boiling water. The chemical properties are stable, and it is stable to acids, alkalis, salts and many solvents within a certain temperature range. Hygienic and safe, meeting the requirements of food packaging. 4. Polyamide (PA) is commonly known as nylon, which has strong gas barrier properties, but has poor barrier properties to water vapor, strong water absorption, and swells with the increase of water absorption, resulting in a sharp decline in gas barrier and moisture barrier properties. Its strength and package dimensional stability are also affected. It has good mechanical properties, good toughness and wear resistance, cold resistance and heat resistance. It has stable chemical properties, good printability and good puncture resistance. The material meets the requirements for hygienic safety of food packaging. Therefore, it is widely used in frozen packaging and retort packaging of food. Because of its good printability and puncture resistance, most of the refined rice sold in the market now use nylon packaging bags. The above is the material of common food packaging film analyzed and summarized by wood grain film manufacturers, I hope it can be helpful to everyone.