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source： time：2015-09-18 14:48:17 frequency：

the difference between cpp and bopp thin films: polypropylene film packaging with the use of cast polypropylene (cpp) and polypropylene (bopp) biaxial stretching two, because of the different manufacturing methods, properties are quite different.
cpp films with good sealing performance, high elongation, used for the inner layer of the composite packaging bag, especially for high temperature (121 deg c) cooking bags, it can also produce high composite bag 145 deg c high temperature cooking, but also aluminum and bopp, pet, opa, pt and other compound.
bopp film has very good transparency, heat resistance, barrier property, mechanical strength than cpp film, can be heat sealed. the outer package used for composite bag, with good sealing performance of the ldpe, eva or aluminum foil composite use.
in addition to bopp and cpp, as well as the high transparent polypropylene manufacturing a water cooling method, it is transparent like bopp, and heat sealing good, more than a single film packaging clothing.

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