1. Polyethylene (PE)
Low-density polyethylene (LDPE): used to make soft, transparent plastic bags, such as food storage bags, shopping bags and ziplock bags. LDPE has good tear resistance and moisture resistance.
High-density polyethylene (HDPE): used to make plastic bags with higher strength, such as supermarket shopping bags and garbage bags. HDPE materials are tougher and have better heat resistance and chemical resistance.
Linear low-density polyethylene (LLDPE): commonly used to make stretch film and packaging film, with good tensile properties and impact resistance, suitable for packaging applications that require high strength and flexibility.
2. Polypropylene (PP)
Polypropylene (PP): used to produce plastic bags with good heat resistance and chemical resistance, such as food packaging bags and pharmaceutical packaging bags. PP materials have high transparency and can be used to make microwave heating bags.
3. Polyvinyl chloride (PVC)
Polyvinyl chloride (PVC): used to produce plastic bags with excellent durability and waterproofness, such as anti-static bags and industrial packaging bags. PVC has excellent transparency and plasticity, and is suitable for making packaging that requires good visibility and sealing.
4. Polyester (PET)
Polyethylene terephthalate (PET): used to produce plastic bags with high transparency and good tensile strength, such as food vacuum packaging bags and freezer bags. PET materials are resistant to high temperatures and wear, and are widely used in packaging that requires high barrier properties.
5. Polyamide (PA/Nylon)
Polyamide (PA): often compounded with other materials to produce high barrier and puncture-resistant packaging bags, such as vacuum packaging bags and bubble bags. PA materials have excellent tear resistance and abrasion resistance, and are suitable for high-demand packaging applications.
6. Ethylene-vinyl acetate (EVA)
Ethylene-vinyl acetate (EVA): used to produce plastic bags with good flexibility and adhesion, such as frozen food bags and film bags. EVA materials are transparent and non-toxic, suitable for food-grade packaging.
7. Biodegradable materials
Polylactic acid (PLA): a degradable plastic widely used in environmentally friendly packaging bags. PLA material is derived from renewable plant resources and is suitable for the production of green and environmentally friendly plastic bags.
Starch-based plastics: Degradable plastics blended with other polymers, suitable for making disposable environmentally friendly bags, garbage bags, etc., which helps reduce plastic pollution.
8. Additives
Antioxidants: used to extend the service life of plastic bags and prevent the material from degrading during manufacturing and use.
Plasticizers: used to increase the flexibility and ductility of plastic bags, making them easier to process and use.
Colorants: used to adjust the color of plastic bags to meet the customized needs of different customers.
Antifogging agents: used to prevent the formation of water vapor on the inner wall of the packaging bag and maintain the clarity of the product in the bag, especially for food packaging.
Each raw material has its own characteristics. We can choose a suitable material combination according to the purpose, performance requirements and environmental standards of the final product to produce plastic packaging bags that meet the requirements.
