Polyethylene film and polypropylene film are common plastic film materials. They have certain similarities, but there are also some differences. Many customers wonder about which is better when they choosing material films to produce plastic packaging. Today Let's take a closer look at these two materials.
Polyethylene film is a polymer material mainly made from ethylene using a polymerization reaction. Polyethylene film has good toughness and flexibility, excellent heat resistance, acid and alkali resistance, water vapor resistance, heat sealing and oxygen resistance. It is widely used in food packaging, medical packaging, cosmetics packaging, agricultural protection and other fields.
Polyethylene films are classified into high-density polyethylene (HDPE) films and low-density polyethylene (LDPE) films. HDPE films have higher hardness and strength, while LDPE films are more flexible with higher tensile strength and tear resistance.
Polypropylene film is a synthetic resin material made by polymerizing propylene. Polypropylene film has good transparency, wear resistance, high-temperature resistance, corrosion resistance, high strength, and excellent mechanical properties. It is widely used in food packaging, medical packaging, industrial packaging, construction waterproofing, and other fields.
The raw material for polyethylene film is ethylene, while the raw material for polypropylene film is propylene.
Polyethylene film has low density (0.91g/cm³), good flexibility, high tensile strength, and tear resistance. Polypropylene film has higher density (0.9-0.94g/cm³), better hardness, wear resistance, and mechanical properties, but poor flexibility.
Polypropylene film is more transparent with good glossiness and clarity, while polyethylene film has poor transparency and glossiness.
Polypropylene film has good heat-sealing properties and can be used for heat-sealed packaging, while polyethylene film has poor heat-sealing properties.
Polyethylene film can tolerate temperatures ranging from -60°C to 90°C, while polypropylene film can tolerate temperatures ranging from -10°C to 110°C.
Polyethylene film is usually used in food packaging, medical packaging, agricultural protection, and other fields, while polypropylene film is usually used in industrial product packaging, building waterproof materials, power products, and other fields.
In summary, although polyethylene film and polypropylene film are both plastic film materials, their different material properties determine their advantages, disadvantages, and application fields. Choose the appropriate material according to specific usage needs.
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