Glass Cloth Insulation Tape
OPALUS PACK is a manufacturer of glass cloth insulation tape for motor insulation, transformer insulation, coil wrapping, and high voltage cable wrapping. It is used where ordinary PVC electrical tape may lose strength under heat, dielectric stress, or abrasion. This fiberglass cloth electrical tape combines woven glass cloth backing with heat-resistant adhesive options, helping electrical assemblies maintain insulation, flame retardant support, clean wrapping, and repeatable roll quality.
- Backing: woven fiberglass cloth
- Adhesive: silicone, acrylic, or thermosetting rubber
- Color: white standard, other colors by request
- Thickness: 0.13 mm – 0.25 mm, grade dependent
- Width: 5 mm – 200 mm slit rolls available
- Length: 30 m, 33 m, 50 m, or specified length
Product Overview
Product Overview
Glass cloth insulation tape is made for electrical insulation points that need both dielectric protection and mechanical reinforcement. In motors, it can be applied around lead wires, end turns, and winding sections exposed to vibration and heat. In transformers, this glass cloth electrical insulation tape supports coil outer wrapping, layer insulation, crossover insulation, and lead pad hold-down. For cable assemblies, it helps keep wrapped high-voltage sections stable where spiral overlap, edge strength, and adhesion after heat exposure matter.
The adhesive should match the working condition. Silicone adhesive is often selected for high temperature insulation tape used near hot coils or H-class insulation structures. Acrylic adhesive can support clean converting, stable unwind, and balanced bonding. Thermosetting rubber adhesive is suitable when stronger holding force and abrasion resistance are needed after heat exposure.
Benefits
- Helps insulate motors, transformers, coils, and high voltage cable assemblies.
- Woven fiberglass backing improves tear resistance during tight wrapping.
- Flame retardant glass cloth tape grades can support fire resistant insulation designs after system testing.
- High tensile strength helps hold coil banding, lead anchoring, and cable wrapping.
- Silicone adhesive options improve heat resistance for transformer coil insulation tape applications.
- Adhesion after heat aging can be checked to reduce flagging, lifting, or insulation gaps.
What Should Be Confirmed Before Glass Cloth Insulation Tape Is Used on Transformer Coils?
Before this tape is approved for transformer coil wrapping, thickness and width are only part of the selection. The actual insulation position should be reviewed first: outer coil wrap, layer support, crossover insulation, lead pad hold-down, or end-turn fixing. Each position may need a different balance of tensile strength, conformability, dielectric breakdown value, flame-retardant behavior, and heat-aging stability. For dry transformer work, sample rolls should be tested with the actual winding shape, varnish or resin process, lead wire movement, and expected operating temperature. This helps confirm whether the tape keeps adhesion, resists edge tearing, and avoids lifting after winding pressure and heat exposure.
TDS
| Item | Typical Value |
|---|---|
| Product Type | Glass cloth electrical insulation tape |
| Backing Material | Woven fiberglass cloth |
| Adhesive System | Silicone adhesive, acrylic adhesive, or thermosetting rubber adhesive |
| Total Thickness | 0.13 mm – 0.25 mm, selected by insulation grade |
| Standard Color | White, other colors by production agreement |
| Slit Width Range | 5 mm – 200 mm, custom slitting available |
| Roll Length | 30 m, 33 m, 50 m, or specified length |
| Temperature Rating | 155 C, 180 C, or 200 C grade, depending on adhesive system |
| Dielectric Breakdown Reference | 2.5 kV – 5.0 kV typical range, confirm by grade and test method |
| Insulation Resistance | Checked after normal condition or heat aging, grade dependent |
Applications
- Motor insulation for lead wires, end turns, winding sections, and heat-exposed electrical joints.
- Transformer insulation for coil outer wrapping, layer support, crossover insulation, and lead fixing.
- High voltage cable wrapping where dielectric strength, tight overlap, and edge stability are important.
- Coil banding and anchoring in equipment exposed to vibration or thermal cycling.
- Wire harness insulation where ordinary plastic tape may soften, shrink, or tear.
- Repair and reinforcement of electrical insulation systems after sample validation.
How Should Glass Cloth Insulation Tape Be Matched to Motor Leads and High Voltage Cable Wrapping?
For motor leads and high voltage cable wrapping, this tape should be selected by both electrical stress and mechanical stress. The woven fiberglass backing adds tear resistance, abrasion support, and heat stability, while the adhesive controls how well the tape stays in place after thermal cycling. Silicone adhesive is usually preferred for hotter zones. Rubber or acrylic systems may be selected when bonding behavior, handling, or cost balance is more important. During approval, check dielectric strength, adhesion after heat aging, flame-retardant grade, wrapping overlap, cable bend radius, and slit-edge cleanliness during tight spiral wrapping.
FAQ
Is glass cloth insulation tape the same as ordinary electrical tape?
No. Ordinary electrical tape is usually PVC based. Glass cloth insulation tape uses woven fiberglass backing, so it gives better heat resistance, tear resistance, and mechanical support for motors, transformers, coils, and cables.
Which adhesive should be selected for high temperature electrical insulation?
Silicone adhesive is often selected for higher-temperature motor and transformer insulation. Acrylic or thermosetting rubber adhesive can be used when different adhesion, handling, or cost balance is required.
Can this tape support flame retardant electrical assemblies?
Yes, flame retardant grades are available. The tape can support flame retardant or fire resistant insulation designs, but final performance should be confirmed by the complete insulation system and agreed test method.
What should be tested before bulk production?
Before bulk production, test thickness, width tolerance, dielectric breakdown, insulation resistance, adhesion after heat aging, tensile strength, flame retardant behavior, coil winding tension, cable bend radius, overlap wrapping, and retained sample consistency.