Flame Retardant PET Film
- Material:Flame retardant polyester film
- Thickness:25–250 μm typical range
- Color:Clear, milky white, black, or custom
- Flame Rating:UL94 VTM-rated options
- Surface:Untreated, corona treated, or coated
- Use:Battery, motor, transformer, and electronic insulation
PET Film Supply Company is a Flame Retardant PET Film manufacturer supplying thin-gauge polyester film for insulation parts that need flame control, dielectric strength, and stable converting performance. This film is designed for UL94 VTM-rated applications such as battery module barriers, busbar covers, electronic insulation pads, motor slot liners, and transformer layer insulation. Specifications can be adjusted by thickness, color, surface treatment, and roll size, with final selection based on flame rating, insulation strength, adhesive compatibility, and real assembly testing.
Product Overview
Flame Retardant PET Film is used when an insulation layer needs more than basic separation. In compact electrical structures, the film must keep its shape, provide dielectric protection, and help reduce flame spread risk if heat or ignition occurs. It is often placed between conductive parts, coils, battery cells, metal housings, busbars, or laminated insulation layers.
For thin materials, UL94 VTM classification should be checked with the tested thickness. A 50 μm, 100 μm, and 188 μm film may not automatically carry the same flame rating unless each gauge has been tested and confirmed. This point matters in battery packs, power supplies, electronic control units, motors, and transformers, where small insulation parts are often used in narrow spaces.
PET Film Supply Company controls thickness, winding tension, slit-edge quality, and optional surface treatment for coating, printing, laminating, or adhesive backing. For punched and die-cut insulation parts, small details such as burrs, dust, film curl, and unstable cutting edges can affect how the part fits after assembly.
Benefits
- Helps reduce flame spread risk in compact electrical and electronic assemblies.
- Supports UL94 VTM-rated material selection for thin-gauge insulation parts.
- Provides dielectric separation for spacers, layer separators, punched pads, and protective covers.
- Fits battery module areas such as cell spacers, busbar covers, tab protection, and inner housing pads.
- Converts well into punched or die-cut parts where burr control and edge stability matter.
- Halogen-free options are available for electronic, electrical, and battery material requirements.
- Stable thickness, winding tension, and slit-edge quality support smoother repeated production.
- Suitable for folding, laminating, printing, adhesive backing, slitting, and precision cutting.
How Does Flame Retardant PET Film Improve Electrical Safety?
Flame Retardant PET Film improves electrical safety by adding a self-extinguishing insulation layer where flame behavior and dielectric strength must work together. In battery modules, it helps separate cells, tabs, busbars, and housing surfaces. In motors, it can be converted into slot liners, phase barriers, or coil separators. In transformers, it can be used for winding layers, insulation washers, and punched separators. Before production, confirm dielectric strength, puncture resistance, shrinkage, adhesive compatibility, folding behavior, and forming stability under the actual assembly process.
Production Line
TDS
Property | Typical Data / Option | Technical Note |
Product Type | Flame Retardant PET Film | For thin-gauge insulation and flame control parts |
Base Material | Flame retardant polyester film | Halogen-free options available |
Thickness Range | 25–250 μm | Gauge should match the required flame rating |
Thickness Tolerance | ±3–5% typical | Depends on thickness, width, and slitting requirement |
Color | Clear, milky white, black, custom | Black film may support light-blocking insulation parts |
Flame Rating | UL94 VTM-rated options | Rating must match tested thickness and test method |
Surface Treatment | Untreated / corona / coated | For printing, laminating, or adhesive coating |
Surface Energy | 38–52 dynes typical | Confirm before glue coating, printing, or lamination |
Tensile Strength | 150–220 MPa typical | Direction and thickness may affect value |
Elongation at Break | 80–130% typical | Useful for folding and punched insulation parts |
Dielectric Strength | 120–180 kV/mm typical | Depends on thickness and test condition |
Volume Resistivity | ≥10¹⁴ Ω·cm typical | Important for electronic, motor, and transformer insulation |
Thermal Shrinkage | ≤1.5% at 150°C / 30 min typical | Test under actual lamination or winding heat |
Processing | Slitting, die-cutting, punching, laminating | Clean edges are important for narrow insulation spaces |
Roll Width | Custom slit width available | Supplied in jumbo rolls or slit rolls |
Typical Use | Battery, motor, transformer, power electronics | Finished components should be tested in real assembly structures |
Applications
- Battery modules:cell spacers, module liners, busbar covers, tab insulation, and pack housing pads.
- Motors:slot liners, phase insulation, coil separators, and punched insulation barriers.
- Transformers:winding separators, layer insulation, insulation washers, and flame retardant spacers.
- Power electronics:inverter insulation, PCB protection spacers, control unit barriers, and power supply pads.
- Die-cut components:gaskets, pads, spacers, covers, and laminated insulation sheets.
- Electrical labels:warning label base film, printed insulation labels, and cable flag labels.
- Cable and wire harness areas:wrapping layers, flexible barriers, and inner insulation layers.
What Should Be Checked Before Using Flame Retardant PET Film for Batteries, Motors, and Transformers?
Before selecting Flame Retardant PET Film for safety-related insulation parts, review the rating, tested gauge, surface condition, and converting behavior together. If the project requires UL94 VTM-rated film, the test method and final part thickness should match the application requirement. For battery module use, adhesive compatibility, punching cleanliness, and cutting quality can affect performance around cells, tabs, and busbars. For motor and transformer insulation, folding behavior, puncture resistance, dielectric strength, and shrinkage after heat exposure should be tested in the real winding or assembly process. Technical data is useful for early screening, but the finished component should still be tested in its real assembly structure.
Loading Details
FAQ
Is Flame Retardant PET Film the same as normal PET insulation film?
No. Normal PET film may provide basic insulation, but the flame-retardant grade is selected when the part also needs controlled burning behavior, such as UL94 VTM-rated performance for thin insulation materials.
Can this film be used for battery insulation?
Yes. It can be used for module barriers, busbar covers, tab insulation, cell spacers, and inner pack insulation pads. The final design should be tested with the selected adhesive, thickness, and assembly structure.
What thickness is recommended for motor or transformer insulation?
Common choices range from 50 μm to 250 μm, depending on slot space, winding pressure, dielectric requirement, folding behavior, and forming method.
Can the film be die-cut or laminated with adhesive?
Yes. It can be slit, punched, die-cut, coated, printed, or laminated. For stable production, confirm surface energy, adhesive bonding, cutting burr control, film curl, and roll cleanliness before mass production.
