What is the general material used for food packaging bags? What are their characteristics?

texture of material:

Generally, the materials used for food packaging bags include PET film, PE film, PA film, OPP film and CPP film.

characteristic:

PET film: this film is super transparent, hard, high temperature resistant and has good printing effect. It is more suitable for making outer packaging bags of food. PET film feels very fragile, and can make a rustling crisp sound when held in hand.

PE film: the transparency is slightly inferior to CPP, but softer than CPP. PE film has better tensile properties and tensile breaking force. There are two kinds of milky PE and transparent PE (HDPE / LDPE / LLDPE), which feel soft.

PA film (nylon): PA material is tough, transparent, wear-resistant, puncture resistant, easy to be oxidized, easy to shrink and wrinkle. This material is suitable for similar bone products.

OPP film: the material is hard and can not be stretched. The heat sealing type is very good, but the transparency is general, the material is brittle and the hand feel is poor.

CPP Film: the transparency of CPP material is worse than OPP, but better than PE. The material is soft and resistant to high temperature. It can be used as printing material, but it is not easy to print.