Food packaging bags are generally used PET film, PE film, PA film, OPP film and CPP film, etc.
characteristic:
PET film: This film is ultra-transparent, hard material, and high temperature, printing effect is good, more suitable for food bags, PET film feels particularly brittle feel, can be issued in the hands of rustling crisp sound.
PE film: slightly less transparent cpp, but better than cpp, PE film tensile properties are better, better pull force. There are two kinds of milky white PE and transparent PE (HDPE / LDPE / LLDPE), feel soft.
PA film (nylon): PA material is tough, transparent and wear resistant and resistant to piercing, easy to be oxidized, easy to shrink and wrinkle, this material is suitable for similar to the bone products.
OPP film: the material is hard, and can not stretch, heat sealing type is very good, but the transparency is more general, more brittle material.
CPP film: CPP material transparency than OPP poor but better than PE, soft and high temperature materials, can be used to do printing materials, but not easy to print.