According to the different processing technology, polypropylene film can be divided into CPP film, BOPP film and IPP film. The relevant conditions are as follows:
CPP film and polypropylene film produced by casting process, CPP film can be divided into general type, metallized type and retort type film. The general-purpose type is a commonly used CPP film material, and the film can be adjusted within a certain range; the metallized type is a high-grade CPP film product, which is made of polypropylene material with special technology and special specifications. Heat sealing strength; the cooking type has higher requirements for heat resistance, usually random copolymers are used as raw materials, and the initial heat sealing temperature is higher.

BOPP film is a polypropylene film produced by biaxial stretching technology. BOPP film can be divided into: antistatic film, which is obtained by coating antistatic agent on the substrate or mixing antistatic agent into polymer; Anti-fog BOPP film, which has a good fresh-keeping effect, has developed rapidly in the field of packaging products. It is obtained by stretching the easy-cut BOPP film in the longitudinal or transverse direction; the porous BOPP film filled with inorganic substances is modified by inorganic substances. It is made of blended polypropylene; there are also easy-to-print BOPP films.
IPP is a polypropylene film produced by down-blown water-cooled film blowing technology. The optical properties and film thickness deviation of IPP film are slightly lower than those of CPP and BOPP, but the process is simple and the cost is low. It can be packaged with simple seals at the upper and lower ends.

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