The classification of the high-temperature cooking bags CPP and application scope

About, high-temperature cooking bags of CPP classification and application of knowledge, retort pouch mostly USES CPP material class, as a result of the CPP material category is different, its temperature resistance is different also, in the introduction of commonly used the classification and application of CPP. （ 1) Universal. Multi-layer co-extrusion flow film due to the different USES of different design co-extruding level. Used for automatic packaging machine of bread, for example, packaging, material, Especially the underwear, pants) Packing, fruits, etc. , or to be used with BOPP/CPP two layers of film after printing, used for cloth, dry food, Bags, such as instant noodles bowl cover, etc. ) The packing. Universal is the structure of the copolymer PP/PP/copolymer PP or are gathering. （ 2) Metal type. Required product surface to evaporate metallized ( Such as aluminum) With a strong adhesion strength, after the evaporation can still maintain good dimensional stability and rigidity. In addition has lower heat sealing temperature and high heat sealing strength. Metal type of structure for copolymerization PP/PP/copolymer PP. （ 3) Cooking type. Used for cooking the second copolymerization of CPP, able to withstand 120 ℃ and 0. 15 mpa pressure cooking sterilization. Already keep the shape of the internal food, flavor, and film will not crack, peel or adhesive, and has excellent dimensional stability, often with nylon membrane or polyester film composition, containing liquid packaging food and meatballs, dumplings and other food or food processing frozen food. Cooking type three layer PP membrane structure for the copolymerization PP/copolymer PP copolymer PP. （ 4) Type high-temperature cooking. Packaging roast chicken, barbecued spareribs and jam, beverage, 121 ~ 135 ℃ high temperature sterilization of the three layers of copolymerization CPP film, including copolymerization PP requirements than the general type cooking copolymerization PP have better performance. In addition to the three layers of film and stretch film barrier property five layers of packaging, its structure is: the PP/adhesive/PA/adhesive/copolymerization PE; PP/adhesive/PA/adhesive/EVA; PP/adhesive/EVOH/adhesive/PE; PP/adhesive/EVOH/adhesive/EVA; ； PP/adhesive/EVOH/adhesive/PP etc. Cooking bags CPP film should use polypropylene or blending modification of polypropylene pellet manufacturing, and should not adopt polypropylene. For use are made of polypropylene CPP film after high-temperature cooking crispy will happen, in the drop test pincer-like device is easy to burst, causing leakage of contents. In addition, the limit temperature of the inner layer thin film adhesion, medium density polyethylene is 110 ℃, special polyethylene is 120 ℃, polypropylene is 125 ℃, special polypropylene is 140 ℃. Want to customize cooking bags, please see below