Cast polypropylene film (CPP) cast polypropylene film is cast polypropylene film production process can be divided into ordinary cooking class CPP and CPP are two types of hard plastic film excellent in transparency, uniform thickness, and vertical and horizontal performance uniform, generally used as the inner layer of the composite film material. Thickness of ordinary CPP film is generally between 25 ~ 50μm selling plastic film, and after the OPP composite better transparency, surface bright, feel strong plastic film, the average gift bags are used such materials. This film also has good heat sealability. Theoretically, if the surface tension is below 33 dynes object / cm black plastic film, ordinary ink can not be attached to a solid or adhesive, it is necessary to deal with the surface thereof. Polyesters (PET, PBT, PEN, PETG) belong to polar polymers, the higher the surface free energy, surface wetting tension above 40 dynes / cm. But for high-speed color printing or vacuum aluminum layer to increase adhesion with the film surface between BOPET, BOPET film is also required to be surface-treated to further enhance its surface wet tension. Transparent film, Wuhai plastic film, provided by Red Plastic Factory Xiongxian red plastic factory. Red Xiongxian plastics plant (tztz89647.ynshangji.com) strong, credible, in Baoding plastic materials industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the red plastic factory and you hand in hand into the brilliant, for a better future!