1. Chemical structure
PVC film (polyvinyl chloride film)
PVC film is polymerized from vinyl chloride monomers, and its molecules contain chlorine atoms, which make it highly flame retardant and chemically resistant.
PE film (polyethylene film)
PE film is polymerized from ethylene monomers, does not contain chlorine, has a simpler molecular structure, and has good flexibility and low-temperature resistance.
2. Physical properties
Flexibility and elasticity
PE film is usually softer and has good ductility, which is suitable for packaging that requires high tear resistance and impact resistance.
PVC film is harder and more rigid, which can provide better support in some applications, but may become brittle at low temperatures.
Transparency and gloss
PVC film is generally better in transparency and gloss than PE film, so it is often used in packaging that needs to display products.
Chemical resistance and weather resistance
Due to the presence of chlorine atoms in the molecule, PVC film usually performs better in chemical resistance and UV resistance, while PE film is superior in low-temperature resistance and impact resistance.
3. Application fields
PVC film
Commonly used in decorative packaging, window film, industrial protective film and other fields.
PE film
Widely used in food packaging, agricultural film, shopping bags and various flexible packaging products.
4. Cost and environmental protection
Cost
Generally speaking, the production cost of PE film is lower, so the price is more economical and suitable for large-scale application.
Environmental protection
PE film is easier to recycle and reuse, while PVC film may produce harmful substances during the recycling process due to the chlorine element, so special attention should be paid to its environmental protection treatment.
Conclusion
The distinction between PVC film and PE film mainly depends on their chemical composition, physical properties, application fields, cost and environmental protection characteristics. Which film to choose depends on the specific application requirements: if higher transparency and chemical resistance are required, PVC film may be more suitable; if good flexibility, low cost and high environmental protection are required, PE film will be a better choice.
