Plastic bag is one of the essential necessities in life. The common materials for food packaging are PE polyethylene, PS polystyrene, PS polystyrene, etc. The main common plastic bags are low-pressure plastic bags and high-pressure plastic bags! Today, let's share the differences between low-pressure plastic bags and high-pressure plastic bags!
Low pressure plastic bag material: made of high-density polyethylene, the main feature is hard, very cool, opaque, not easy to break. High stability, good dimensional stability, high heat resistance and mechanical strength, high water vapor barrier, poor transparency.
The main material of high-pressure plastic bag is low-density polyethylene. Its main characteristics are soft, transparent, sticky, easy to wear and low strength. It has lower crystallinity and softening point, better softness and elongation. Impact resistant, the thickness of high-pressure plastic bags is relatively low, so the required materials are redundant low-pressure plastic bags. Therefore, the price of high-pressure plastic bags will be higher!
In the scope of application, high-pressure film is commonly used in light packaging film such as food, daily use, vegetable, shrink, self-adhesive, agricultural mulch film, shed film, fresh-keeping film, etc.; low-pressure film is mainly used in heavy packaging film, tear film, vest bag, etc. due to its high film strength