What are the characteristics of the materials used for food packaging bags?
2022-02-16
The materials commonly used for food packaging bags include PET film, PE film, PA film, OPP film, and CPP film.
Characteristics of food packaging bags:
OPP film: The material is relatively hard and cannot be stretched, has excellent heat sealing properties, but has average transparency, is relatively brittle, and has a poor hand feel.
PET film: This film is ultra-transparent, relatively hard, heat-resistant, has good printing effects, and is more suitable for making outer packaging bags for food. PET film feels particularly crisp to the touch and makes a crunchy sound when held.
CPP film: The transparency of CPP material is worse than that of OPP but better than that of PE. The material is soft and heat-resistant, can be used for printing materials, but is not easy to print.
PE film: The transparency is slightly inferior to CPP, but it is softer than CPP. PE film has good stretching performance and breaking strength. There are two types: milky white PE and transparent PE (HDPE/LDPE/LLDPE), which feel relatively soft.
PA film (Nylon): PA material is relatively tough, has good transparency, is wear-resistant and puncture-resistant, easily oxidizes, and is prone to shrinkage and wrinkling. This material is suitable for packaging products like bone-like items.
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