SAFETY COMPLIANCE & THERMAL MANAGEMENT
Electrical Insulation, Thermal Interface & EMI Shielding
Custom converting of dielectric barriers, UL94 V-0 flame-retardant insulators, thermally conductive gap fillers, and metallic shielding foils. Engineered for lithium battery packs, power electronics, transformers, and telecommunication devices with optional custom adhesive lamination (3M™, Crown, Nitto).
UL94 V-0
Flame-Retardant Standards
Up to 10 kV+
Dielectric Breakdown Resistance
3M 8805–8820
Thermally Conductive Tapes
Full Lamination
Custom Adhesive Backing
1. Functional Material Categories
DIELECTRIC & FLAME RETARDANT
Electrical Insulation Films & Fish Paper
High-dielectric barriers engineered to eliminate electrical arching and short circuits. We convert classic vulcanized fiber Fish Paper, Mylar®, Formex™ (flame-retardant PP), and Nomex® aramid paper.
- Fish Paper : High mechanical puncture resistance, battery terminal insulation, motor slot liners
- Mylar®: Transparent/Milky white, high dielectric strength (up to 7 kV), moisture barrier
- Formex™ GK & Nomex®: UL94 V-0 certified, score-and-fold barriers for power supplies & inverters
THERMAL TRANSFER & BONDING
3M™ 8800 Series Thermal Tapes
Pressure-sensitive acrylic transfer tapes loaded with ceramic fillers. Eliminates mechanical clips and screws while transferring heat away from IC packages and power semiconductors.
- Grades & Calipers: 3M 8805 (0.127 mm), 8810 (0.25 mm), 8815 (0.375 mm), 8820 (0.50 mm)
- Thermal Performance: 0.6 W/m-K thermal conductivity with high dielectric isolation
- Applications: LED light bar bonding, IC heat sink attachment, power converter thermal coupling
GAP FILLING & HEAT SINK COUPLING
Silicone Thermal Gap Pads
Highly conformable, naturally tacky gap filling pads designed to bridge irregular air gaps between hot electronic components and cooling enclosures, preventing air pockets.
- Thermal Conductivity: 1.5 W/m-K up to 6.0 W/m-K options
- Thickness Range: 0.5 mm up to 5.0 mm with fiberglass-reinforced carriers
- Applications: CPU/GPU heatsinks, EV battery module cooling, telecom 5G base station radios
GROUNDING & HEAT SPREADING
Copper & Aluminum EMI Shielding
Pure rolled copper and aluminum foils offering dual functionality: high planar thermal heat spreading alongside electromagnetic interference (EMI/RFI) suppression.
- Foil Calipers: 0.018 mm (0.5 oz), 0.035 mm (1 oz), up to 0.1 mm
- Adhesive Systems: Conductive acrylic (Z-axis electrical grounding) or non-conductive PSA
- Applications: Mobile device heat dissipation, transformer shielding, flex PCB grounding tabs
Custom Adhesive Lamination on Non-Adhesive Films
Many barrier films (pure Fish Paper, Nomex, copper foil, or rigid Mylar) are produced raw without glue. We utilize multi-station rotary calenders to pre-laminate pressure-sensitive adhesives prior to precision die-cutting.
3M™ High-Spec PSA
Lamination with 3M 467MP, 468MP, or 300LSE for high-heat shear holding and plastic bonding.
Crown (皇冠) Tapes
Cost-effective double-sided tissue and PET carrier tapes providing aggressive bond on metal enclosures.
Selective Zone Lamination
Leave critical contact points adhesive-free while bonding surrounding border perimeters.
2. Technical & Environmental Specification Guide
| Material Designation | Dielectric Breakdown | Flame Rating | Thermal Rating | Conductivity (W/m-K) | Typical Applications |
|---|---|---|---|---|---|
| Fish Paper | 10 kV / mm | UL94 94V-0 (composite) | Class B (130°C) | Insulator | 18650/21700 battery cell ring gaskets, motor slots |
| Mylar® | 5 – 7 kV / mil | UL94 VTM-2 / V-0 | -40°C to +130°C | Insulator | Transformer coil barrier, PCB underside insulation |
| Formex™ GK Series | Up to 24 kV | UL94 V-0 Certified | Up to 115°C | Insulator | Scored-and-folded 3D barriers for server switch power |
| 3M™ 8810 / 8815 | 38 kV / mm | UL94 V-0 | -40°C to +125°C | 0.6 W/m-K | LED light engine attachment, heat sink adhesive bonding |
| Silicone Thermal Pad | > 4 kV / mm | UL94 V-0 | -50°C to +200°C | 1.5 to 6.0 W/m-K | EV battery cooling plate, telecommunication processors |
| Copper Shielding Foil | Electrically Conductive | Flame Retardant PSA | -40°C to +150°C | ~385 W/m-K | EMI/RFI shielding, flex circuit grounding, heat spreading |
3. Precision Finishing & Assembly Aids
Crease Lines & Score Cutting
Precision score-lines and perforations on Formex™ and Fish Paper allowing flat-shipped insulators to be hand-folded into rigid 3D barrier enclosures.
Continuous Kiss-Cut Battery Rings
Fish paper circular insulator rings supplied kiss-cut on reels with center holes fully evacuated, designed for automated lithium battery top cap pasting machines.
Extended Finger Pull-Tabs
Thermal gap pads and 3M 8810 die-cuts outfitted with extended release liners, enabling assembly operators to peel carrier liners in less than a second.
Frequently Asked Questions
What is the difference between Fish Paper and Formex?
Fish Paper (vulcanized fibre) is an economical, plant-based cellulosic material favored for battery cell isolation and mechanical tear resistance. Formex is an extruded polypropylene film carrying strict UL94 V-0 flame ratings with superior score-and-fold capability.
Can conductive adhesive on copper foil provide electrical grounding?
Yes. When coated with conductive acrylic adhesive containing nickel or silver particles, the foil provides low electrical resistance through the adhesive layer (Z-axis conductivity), making it ideal for grounding and EMI shielding.
How do I choose between 3M 8810 and silicone thermal pads?
Use 3M 8810 when you need mechanical bonding without screws (it is a structural adhesive tape). Use silicone thermal gap pads when you have large or variable mechanical tolerances (0.5 mm – 5 mm gap) where mechanical fasteners are already present.
What payment methods and currencies do you accept?
We support standard USD T/T (SWIFT wire transfers) for global accounts. In addition, to help international buyers minimize SWIFT intermediary bank charges and transfer delays, we provide local domestic bank collections across most European and North American regions (supporting local transfers in EUR via SEPA, GBP, USD, and other major European currencies).
Need Custom Die-Cut Insulators or Thermal Interfaces?
end us your technical drawings (.DXF, .DWG, .PDF) or target electrical/thermal requirements. Our converting engineers will provide DFM feedback, material recommendations, and formal quotes within 24 hours.