PEN Film for New Energy Battery and Electronic Components

Short Description:

PEN Film is a high-performance polyester film derived from polyethylene naphthalate. It offers significantly improved thermal stability, dimensional stability, chemical resistance, and UV/hydrolysis resistance compared to standard PET film, while remaining more cost-effective and easier to process than traditional polyimide (PI) films. Available in both optical-grade (low haze, high transparency) and industrial-grade (translucent/matte) versions, PEN film serves as the ideal bridge between PET and PI for demanding applications where PET falls short but PI is over-engineered or too expensive.

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Product Detail

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PEN Film for New Energy Battery and Electronic Components

Features

1. Higher continuous use temperature than PET(155–180℃ typical, vs. ~130°C for PET; short-term peaks up to 200℃+)

2. Excellent dimensional stability–Low coefficient of thermal expansion (CTE ~15–20 ppm/℃, about half that of PET), minimal heat shrinkage

3. Superior hydrolysis resistance–Outperforms PET in hot/humid environments; suitable for outdoor and underwater applications.

4. Good chemical resistance–Resists acids, alkalis, solvents better than PET

5. Outstanding electrical insulation–High dielectric strength, volume resistivity, and tracking resistance

6. Transparency options -- Optical-grade PEN achieves haze <2% and luminousness >85% (similar to Teijin Q65HA); industrial grades offer controlled translucency

7. Excellent barrier properties–Lower oxygen and moisture vapor transmission rates than PET

8. Good mechanical strength–High tensile modulus and tear resistance

Product name	High Temperature & Chemical Resistant PEN Film for New Energy Battery
Regular thickness	25μm、50μm、75μm、100μm，125μm
Regular width	1000mm
Length	Customized as per request
Transmittance	≥75% (up to ≥85% for certain types)
Haze	≤3%
Temperature resistance	155℃~180℃

Recommended Applications:

1. Motor & transformer insulation: Slot liners, phase insulation, layer insulation in generators, EV motors, dry-type transformers

2. Flexible printed circuits (FPC) - Stiffeners, coverlay, carrier tapes, mask films for soldering/reflow processes

3. Industrial tapes & labels–High-temperature masking tape base, durable label facestock, wire harness wrapping

4. Electronic components–Membrane switches, touch sensor substrates, battery cell insulation (pouch cell tabs)

5. Optical & display–Transparent windows for sensors/cameras, flexible display backplanes (low-haze grade), protective covers for LED modules

6. Solar & renewable energy–Backsheet inner layer, junction box insulation, cable jacketing reinforcement

7. Packaging–High-barrier lidding films, retort pouch structures, medical device packaging requiring steam sterilization.

When to Choose PEN over PET or PI:

1. When PET fails due to temperature (>130°C) or dimensional instability – e.g., automotive under-hood electronics, reflow soldering processes, high-power LED assemblies.

2. When transparency is required alongside moderate heat resistance – e.g., sensor windows, optical alignment fixtures, see-through insulating layers. PET cannot survive the heat; PI is opaque; CPI is too expensive.

3. When long-term reliability in humid or chemically aggressive environments is critical – e.g., marine equipment, outdoor telecom cabinets, battery pack enclosures. PET hydrolyzes; PI absorbs moisture and may degrade insulation.

4. When budget constraints rule out PI but performance demands exceed PET – e.g., mass-produced consumer electronics, mid-range industrial motors, solar junction boxes.