5 Common Heat Shrink Film Materials Explained

The Ubiquity of Plastic Packaging Films

From vegetable greenhouses to supermarket groceries, plastic films serve diverse purposes. But not all shrink films are created equal - different materials offer unique properties for specific applications.

Comparing the Top 5 Heat Shrink Films

1. POF (Polyolefin) Shrink Film

Structure:

- 3-layer co-extruded film (LLDPE core + PP outer layers)

Key Features:

✓ Fully sealed food packaging

✓ High clarity for product visibility

Common Uses:

• Instant noodles • Milk tea • Cigarettes

2. PET Shrink Film

Characteristics:

✓ Unidirectional shrinkage >70%

✓ Permanent shrink (anti-counterfeiting feature)

✓ Moisture/mildew protection

Primary Applications:

• Beverage shrink labels

• Dairy product packaging

• Electronics bundling

3. PVC Shrink Film

Advantages:

✓ High transparency

✓ Excellent gloss

✓ Maximum shrinkage rate

4. OPS (Oriented Polystyrene) Film

Environmental Benefits:

✓ Meets eco-packaging standards

✓ Superior print resolution

Physical Properties:

• High rigidity • Shape stability • Brilliant transparency

5. PE Shrink Film (Industry Leader)

Performance Advantages:

✓ Extreme durability (tear/impact resistant)

✓ 100% recyclable material

✓ Excellent moisture barrier

Liquid Food Applications:

• Beer & beverage multipacks

• Bottled water/edible oil packaging

• Replacing traditional cardboard

Why PE Dominates Beverage Packaging

- Market Shift: Now used by major brands (Coca-Cola, Wang Laoji)

- Sustainability: Degradable polyester material

- Marketing Value: Printable transparent surface for promotions

Choosing the Right Shrink Film

Consider these factors for your application:

✓ Food contact requirements

✓ Environmental conditions

✓ Printing needs

✓ Sustainability goals