Food packaging bags are made of PET, PE film, PA film, OPP film and CPP film, etc.
PET film: This film is super transparent, has relatively high temperature resistance and good printing effect. It is more suitable for food packaging bags. The PET film feels particularly crisp to the touch, and it can make a rustling sound when held in the hand.
PE film: transparency is slightly inferior to cpp, but softer than cpp, PE film has better tensile properties and better tensile strength. There are two types of milky white PE and transparent PE (HDPE/LDPE/LLDPE), with a soft hand feeling.
PA film (nylon): PA material is relatively tough, has good transparency, abrasion resistance and puncture resistance, is easy to be oxidized, and is easy to shrink and wrinkle. This material is suitable for packing similar bone products.
OPP film: The material is hard and cannot be stretched. The heat-sealing type is very good, but the transparency is relatively general, the material is relatively brittle, and the hand feel is poor.
CPP film: CPP material has worse transparency than OPP but better than PE. The material is soft and resistant to high temperatures. It can be used as a printing material, but it is not easy to print.