Glass Cloth Silicone Adhesive Tape
 | Glass Cloth Silicone Adhesive Tape
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PVC Electrical Tape Company is a manufacturer of glass cloth silicone adhesive tape for high-temperature electrical insulation, motor lead wrapping, transformer lead positioning and coil insulation. The tape uses woven fiberglass backing with silicone pressure-sensitive adhesive, giving it the pull strength needed for tight wrapping and the heat stability needed for Class H style positioning. Rolls are checked for smooth unwind, low edge fray, low dusting and residue behavior after temporary heat exposure and cooling.
Benefits
- Woven fiberglass backing helps resist tearing around leads, coil edges and crossover areas.
- Silicone pressure-sensitive adhesive supports high-temperature positioning without a thick rubber layer.
- Adhesion to steel is typically around 3.8-4.5 N/cm or 9-11 N/25mm, depending on test condition.
- Dielectric breakdown can be specified around >=2000 V or about 3.0 kV, depending on test method.
- Tensile strength around 260-315 N/cm helps the tape keep shape during transformer wrapping and coil banding.
- Low edge fray, low dusting and controlled unwind help keep narrow wrapping cleaner.
Applications
- Motor lead wrapping where tensile strength, heat resistance and neat edge control are required.
- Transformer lead wrapping for dry electrical insulation and stable lead positioning.
- Coil insulation wrapping, outer wrap and end-turn holding.
- Layer insulation and crossover insulation in winding workshops.
- Temporary Class H style heat positioning before final fixing or varnish-related processing.
- Electrical assemblies needing abrasion resistance and dimensional stability near 180C-200C class-style heat exposure.
- Fiberglass cloth insulation tape use where cloth strength is preferred over thin PET film or PTFE-based constructions.
What makes glass cloth silicone adhesive tape suitable for motor lead and transformer wrapping?
This tape is selected for motor lead and transformer work because the glass cloth structure gives better pull strength than many film-based materials. It wraps around lead wires, coil edges and end-turn areas without tearing easily during handling. The silicone adhesive helps maintain surface contact during Class H style heat positioning, while the cloth backing adds abrasion resistance during winding, varnish-related processes and final assembly. For sensitive electrical parts, dielectric value, thickness, adhesion level and edge quality should be checked with the selected grade.
Technical Data Sheet
Item | Typical Value |
Product Type | High temperature glass cloth tape for electrical insulation |
Backing | Woven fiberglass cloth |
Adhesive | Silicone pressure-sensitive adhesive |
Color | White |
Backing Thickness | 0.125-0.13 mm |
Total Thickness | About 0.18 mm |
Adhesion to Steel | 3.8-4.5 N/cm or 9-11 N/25mm |
Tensile Strength | 260-315 N/cm |
Elongation | 5-7% |
Dielectric Breakdown | >=2000 V, about 3.0 kV reference depending on test method |
Temperature Use | 180C-200C class-style high-temperature positioning |
Standard Widths | 6 mm, 9 mm, 12 mm, 19 mm, 25 mm, 50 mm |
Slit Width Tolerance | Around +/-0.5 mm for common slit widths |
Roll Check | Controlled unwind, stable rewind tension |
Edge Check | Low edge fray, low dusting after slitting |
Heat Exposure Check | Residue and staining inspection after cooling |
Product Overview
This silicone glass cloth electrical tape is made for assemblies where thin film tapes may stretch, tear or lose shape near heat. The woven fiberglass backing adds mechanical strength, abrasion resistance and dimensional stability. The silicone adhesive layer helps the tape stay seated on metal leads, varnished coils and insulation layers. A common construction uses about 0.125-0.13 mm glass cloth backing and about 0.18 mm total thickness, giving useful coverage without heavy build at lead exits or end-turn areas.
Roll behavior is checked because it affects wrapping quality. Tight unwind can pull the tape off line; loose rewind may create wrinkles before pressing. For narrow motor leads, crossover points or transformer lead areas, slit width tolerance around +/-0.5 mm can be reviewed by selected width and roll format.
How should edge fray, unwind and clean removal be checked before production use?
Before regular production, the selected silicone adhesive fiberglass tape should be tested on actual motor leads, transformer leads or coil surfaces. The roll should unwind smoothly without jerking, because sudden release can shift narrow wraps or lift the edge before pressing. The slit edge should be checked for loose fibers, fray and dusting near coils and lead wires. For temporary masking or heat positioning, remove the tape after cooling and inspect adhesive transfer, glass fiber residue and surface staining.
FAQ
Is this tape the same as PTFE tape?
No. It uses woven fiberglass cloth and silicone adhesive for electrical insulation, not PTFE film or thread-sealing construction.
Can it be used for 600-volt dry location style applications?
It can be considered when the dielectric value, thickness and safety requirements match the selected grade.
Does the tape remove cleanly after heat exposure?
Clean removal depends on surface type, temperature, heating time and pressure. Test after cooling.
Can the width be customized?
Yes. PVC Electrical Tape Company can produce standard and narrow slit widths for motor leads, transformer leads and coil wrapping.