Manufacturing high-temperature cooking bags of materials

High temperature cooking bags in the bag is a bag for production requirements higher, in the aspect of selecting materials with general compound bag, or there are a lot of difference. The following will give you a brief introduction of high-temperature cooking bags of some requirements on the material. Base material structure of high temperature cooking bags, two, three, four layers and even more. Among them, the two layers of retort pouch is transparent plastic/plastic type, such as pet/CPP or opa/CPP. Three layers of retort pouch have transparent plastic/plastic type, such as pet/opa/CPP, also have opaque containing aluminum foil type, such as pet/al/CPP, opa/al/CPP; Retort pouch is four layers including aluminum foil and opaque pet/al/opa/CPP, the structure is the puncture, enhanced, the packing bag of large capacity, opa should be in ai, more reasonable with CPP. More layers of the lining of the retort pouch need not pure CPP film, but with the multilayer co-extrusion film, such as pa/evoh/pp co-extrusion film, pa/pva/pp co-extrusion film, pet again or aluminum foil more the number of multilayer composite membrane, but the small number. Look from the functionality, including four layer structure of the aluminum foil retort pouch of pet/al/opa/CPP can completely meet the requirements of all cooking food. In addition, the cooking bags can be used in the material, and high oxygen barrier property of PVDC, high resistance of pva, high heat resistance and high barrier property of pen, special aromatic nylon mxd6, etc. Adhesive at present, most of the high-temperature cooking bags used in composite membrane is made through the type composite method. With dry compound used in adhesives, aromatic polyurethane adhesives thousands of aliphatic polyurethane adhesives offers three to anhydride modified polypropylene suspending liquid adhesives. Retort pouch is the first to use in the production of aromatic, polyurethane adhesives but because of the adhesives of residual monomers in high-temperature cooking may produce cracking & other; Pieces & throughout; And endanger the health of eaters. So, since the early 1980 s the United States after the fda's objection, many companies have used a more safe and reliable and maleic anhydride modified polypropylene suspending liquid adhesives manufacturing aliphatic polyurethane adhesives high-temperature cooking bags. Resistance to high temperature cooking bags must use adhesives have good bonding fastness, high temperature medium resistance and heat resistance. Performance of rape resistance to high temperature cooking bags, by adhesives after high temperature cooking, peel strength decrease little or not reduce, even higher. Ordinary ink has no heat resistance, after cooking to abscission, some color will change or fade. Good resistance to high temperature cooking ink should link is two-component reactive polyurethane material of ink, its advantage is printing fastness good, on the pet or opa membrane can get satisfactory effect, after crosslinking curing, ink layer of high temperature, and can form a very strong bonding force between adhesive. But the residual ink will gradually crosslinking curing and lose comfortable sex, so often cause waste, the cost is high also, this request with the ink when it is better to match how much how much, don't match too much at a time. 4. Solvent due to the high quality high temperature cooking bags, must also be careful to use solvent. First, high-temperature cooking bags used adhesive and ink itself want to use the high quality, high purity of non-toxic, tasteless, odourless, no residual solvent, should not contain benzene, toluene, xylene, cyclohexanone, or other high boiling point solvent. Second, glue, ink dilution solvent, used in the water content also should have strict standards.