ETFE Film – Technical Datasheet

Product Overview

ETFE film is produced by melt extrusion of ETFE resin, with a smooth surface and excellent overall performance.
The film supports heat sealing, welding, metallization, lamination, and thermoforming.
All films are manufactured in cleanroom facilities, available in thicknesses from 12.5 μm to 500 μm, and widths up to 1600 mm.
Surface treatment (single or double-sided corona, chemical, or matte treatment) is available to enhance adhesion with other materials.

Key Properties

Chemical Resistance

• Outstanding resistance to most chemicals; inert to acids, bases, and solvents.

• Only molten alkali metals, fluorine, and certain halogen compounds under specific conditions may cause corrosion.

• Excellent barrier to liquids, gases, water vapor, and organic vapors.

Thermal Properties

• Continuous service temperature: -240°C to +150°C

• Melting point: >260°C

Flame Resistance

• Flammability rating: UL 94 V-0

• Oxygen Index: 30%

Electrical Properties

• High dielectric strength: >160 kV/mm (0.025 mm film)

• Low dielectric constant and dissipation factor

• Excellent electrical reliability compared to other films

Mechanical Properties

• Excellent non-stick and low-friction characteristics

• High impact and tear resistance

• Good mechanical performance even at cryogenic temperatures

Weatherability

• Stable under long-term outdoor exposure

• High transmittance of UV and visible light, except far infrared

Packaging

ETFE film is supplied in rolls on standard paper or plastic cores, sealed in protective bags, and packed in custom cartons.

Standard Sizes


 

Typical Applications

1. Front Sheet for Flexible Photovoltaics

• Outstanding weatherability and light transmittance (>95%)

• Non-stick surface reduces cleaning and maintenance costs

• Proprietary surface treatment ensures excellent adhesion to EVA/POE encapsulants

• Weight reduction up to 70% compared to glass (25 μm ETFE: 45 g/m², only 1/100 weight of glass)

• Service life >20 years outdoor

• Continuous temperature range: -200°C to +150°C

• Dielectric strength: 160 kV/mm

• Flame rating: UL 94 V-0

• Optional matte surface to reduce reflection and improve power generation efficiency

2. Pharmaceutical Barrier Film

• Excellent chemical resistance and high purity

• Free from additives, ensuring biocompatibility and low extractables

• Surface-treated ETFE film bonds strongly to rubber stoppers

• Extends drug shelf life by preventing leaching of additives

• Excellent tensile and barrier properties

3. Architectural Membrane Structures

• Ideal for roofing and façade applications

• High weather resistance with >25 years outdoor service life

• Excellent transparency (light transmission up to 93%)

• Fire rating: B1 (GB8624-2012 certified)

• Lightweight with customizable colors, patterns, and shading effects

• Self-cleaning surface with high dirt resistance

4. Release Film for Semiconductor and LED Encapsulation

• Excellent non-stick and low-friction properties

• Continuous service temperature: up to 150°C

• Chemical resistance and flexibility for precise lamination

• Available with single or double-sided matte treatment

• Reduces mold contamination and improves product yield