Introduction to Tape Backing PP Release Films

Introduction to Tape Backing PP Release Films

Tape backing PP release films serve as critical components in pressure-sensitive tape manufacturing, providing the structural base for adhesive coatings while offering controlled release from liners during conversion.

Key Performance Parameters

Thickness Range: 25-100μm

 

Tensile Modulus: 1500-2500MPa

 

Elmendorf Tear Strength: >500g (MD)

 

Release Force Consistency: ±10% across roll

 

Material Innovations

Multi-layer Construction:

 

Adhesive-compatible surface layer (co-extruded tie layer)

 

Reinforced core layer (nucleated PP)

 

Release-modified bottom layer

 

Advanced Release Systems:

 

Non-silicone alternatives (fluoropolymer-based)

 

UV-cured release coatings

 

Micro-embossed surface patterns

 

Manufacturing Excellence

Precision Coating:

 

Gravure coating with 200-300 line/cm cells

 

Dry coating weight control to ±0.05 g/m²

 

Web tension control within 1-2 N/mm

 

Quality Control:

 

100% inline optical inspection (10μm resolution)

 

Real-time coating weight monitoring (beta gauge)

 

Automated defect classification (AI-based)

 

Application Examples

Industrial Tapes:

 

50μm backing with 20g/25mm release

 

Withstands 150°C service temperature

 

Excellent die-cutting performance

 

Medical Tapes:

 

30μm transparent version

 

Sterilization-compatible (EtO, gamma)

 

Low allergen formulation

 

Low Friction Coefficient PP Film