Boiled packaging material is very critical, are you sure you understand?

Boiled food sack is boiled for a marked with the flexible packaging products, is different from the high-temperature cooking bags can resistance to high temperature heating, and on the structure is different from many for three or four layers structure of high temperature cooking bags, water bag is usually 2 or 3 layer structure. Although boiled in high temperature resistant performance and packet blocking performance on the high-temperature cooking bags slightly insufficient, but the actual water bag production process there are still higher technical index requirements, which embodies in the production of the water bag packaging material. If you don't know ah, see together! First is on the choice of packaging film materials, water film choice generally have BOPA, PE, AL etc. Several kinds of material. Among them, the choice of BOPA film to consider film flatness requirement, should choose small arch effect, the surface tension of the membrane to ensure the printing ink adhesion fastness, and based on the product appearance should choose good adaptability to small shrinkage and relative humidity can guarantee the accuracy of BOPA film. As for the choice of heat sealing layer PE, it is necessary for us to be clear: boiled bag PE than ordinary PE should have better heat sealing strength, good heat sealing performance, and can be used in water when maintenance is not broken bag, fine properties such as high transparency. In addition to its own characteristics, we also notice the during heat sealing layer PE cannot have obvious flaws, such as can affect the use of fish eye, impurities, crystal, these are likely to cause water bags in the production of bubble surface appear when piercing thin film, even results in the decrease of barrier property such as non-conforming. In thin film material selection, we are second to consider the selection of printing ink, must consider the film of ink adhesion fastness at the grass-roots level, to ensure that the ink peel strength of parts. In addition, the selection of the adhesive are also important, in order to deal with water production requirements of the packaging bags, should choose ability boiled, the adhesives and ensure the compound after crosslinking curing degree.