Ordinary PET belongs to the crystalline polymers, PET film after the stretching orientation, there will be a greater degree of crystallization, such as heat sealing of it, it will produce shrinkage and deformation, so ordinary PET film does not have the heat sealing performance.
PET film in the use of commodity packaging, in order to solve the problem of heat sealing, usually using BOPET film and PE film or CPP film composite method, which to a certain extent limits the application of BOPET film.
In order to solve the problem of heat sealing, through the modification of PET resin, and the use of A/B/C three-layer structure of the die, has developed a three-layer **** extrusion of the heat sealable PET film, this heat sealable PET film due to one side of the heat sealable layer, so it can be directly heat sealing, very convenient to use. Heat-sealable PET film can be widely used in a variety of commodities packaging and card protection film and other fields (such as: PET aluminum foil gasket and wide-mouth bottle sealing film).