Our Transformer Insulation Pressboard is a high-performance dielectric insulation material designed for transformers and power transmission equipment. Made from high-purity, unbleached cellulose fibers derived from long-fiber coniferous wood, it offers excellent oil impregnation, mechanical strength, and dimensional stability.
With outstanding dielectric properties and thermal resistance, transformer pressboard provides reliable insulation protection, helps prevent electrical breakdown, and ensures long-term performance in high-voltage applications.
Widely used in oil-filled power transformers, distribution transformers, electric machines, capacitors, and switchgear. Available in different thicknesses and customized sizes, GBS provides OEM and ODM solutions to meet specific insulation design and application requirements.
1. High Dielectric Strength: Ensures stable insulation and prevents electrical breakdown.
2. Outstanding Oil Absorption: Enables deep oil impregnation, enhancing electrical performance and longevity.
3. Superior Mechanical Strength: Withstands mechanical stress, ensuring durability in demanding applications.
4. High Thermal Stability: Maintains structural integrity under prolonged high temperatures.
6. Low Shrinkage and Dimensional Stability: Minimizes deformation for a precise fit in transformer structures.
7. Versatile Applications: Ideal for oil-filled power transformers, distribution transformers, electric machines, capacitors, and switchgear.
8. Size Options: Available in 1150×800mm, 1000×2000mm, or customized dimensions.
9. Easy Processing: Can be punched, folded, cut, and formed without difficulty.
| Properties | Units | Values | |||
| ≤ 1.6mm |
1.6-3.0mm | >3.0-6.0mm | |||
| Thickness Tolerance | % | ≤±7.5 | ≤±5.0 | ||
| Density | g/cm³ | 1.0-1.2 | |||
| Tensile Strength |
MD | Mpa | ≥80 | ≥80 | ≥80 |
| TD | ≥55 | ≥55 | ≥50 | ||
| Elongation | MD | % | ≥6.0 | ||
| TD | ≥8.0 | ||||
| Shrinkage | MD | % | <0.7 | ||
| TD | <1.0 | ||||
| Moisture Content | % | ≤8.0 | |||
| Ash Content | % | ≤1.0 | |||
| Electric Conductivity | Ms/m | ≤8.0 | |||
| PH of Water Extractives | 6.0-9.0 | ||||
| Eectric breakdown Strengthinoil | KV/m m |
≥40 | ≥30 | ≥25 | |
* Oil-immersed Transformers: Essential for insulation, improving electrical performance and support.
* Capacitors: Insulating layer between electrodes for stable high-voltage insulation.
* Electric Machines & Appliance: Provides insulation for windings and cores to prevent current leakage.
* Switchgear & Instruments: Isolates circuit components in switches and instruments.
* Current Transformers & Reactors: Provides insulation and support.
* Other Electrical Equipment: Used as a spacer in transformer oil tanks and for making insulation components like slot wedges and winding supports.
GBS Die Cut, as adhesive tape supplier, focuses on the research & development, production and sales of various types of adhesive tapes for different industries and has been authorized as golden distributor of many noted brands for so many years, such as Nomex, Formex, Rogers Poron, 3M, Tesa, and so forth.
Transformer insulation papers and flexible laminates are essential materials that ensure dielectric strength, thermal endurance, and mechanical stability in transformers, motors, and other electrical equipment. These materials are widely used
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