Suzhou Chu Yi Packaging Explains: What's the Difference Between POF Standard Film and POF Crosslinked Film?

Molecular Structure

POF General Film

Manufactured from linear polyethylene (PE) or polypropylene (PP), the molecular chains are linearly arranged without forming a chemical cross-linked network.

POF Cross-Linked Film

By forming a three-dimensional cross-linking network between molecular chains through physical (radiation) or chemical methods, the structure becomes more stable.

2. Thermal Performance

POF General Film

Low melting point (PE around 110-130°C, PP around 160-170°C), easily softens and deforms at high temperatures.

Low heat shrink temperature (usually 70-100°C).

POF Cross-Linked Film

Significant increase in high-temperature resistance (can withstand over 150℃), maintaining shape under high temperatures.

Higher heat shrink temperature (up to over 120℃), suitable for high-temperature environments

3. Mechanical Properties

POF Standard Film

Tensile strength and puncture resistance are average, with good ductility but prone to tearing.

POF Cross-Linked Film

Enhanced strength, toughness, and resistance to piercing, with improved stretch and impact resistance.

4. Chemical Stability

POF General Film

Solvent and oil-resistant to a moderate extent; prolonged contact may cause swelling.

POF Cross-Linked Film

The cross-linked structure enhances the chemical resistance and boasts stronger resistance to solvents and oils.

5. Heat Shrink Properties

POF Standard Film

Lower shrinkage rate (about 20-50%), weaker shrink force, possibly uneven.

POF Cross-Linked Film

Higher shrinkage rate (up to 50-80%), uniform and tightly adherent to the packaging.

6. Application Scenarios

POF Standard Film

Ideal for ambient packaging, suitable for low-demand scenarios such as everyday items and stationery.

POF Cross-Linked Film

For high-temperature and high-protection applications, such as electronic components, medical devices, and high-temperature sterilization packaging for food.

7. Cost

POF Standard Film

Simple raw materials and processes, with low costs.

POF Cross-Linked Film

Complex processing (cross-linking required), higher price.

Summary

POF cross-linked film outperforms standard POF film in terms of temperature resistance, mechanical strength, and chemical stability, although it is more expensive. Selection should be based on actual requirements (such as temperature, protection level, budget), weighing the pros and cons.