GPO-3 UPGM203 Unsaturated Polyester Glass Mat Sheet HM2471 Insulation Board

product details

Description

GPO-3 / UPGM203 / HM2471 Polyester Fiber Sheets are high-strength polyester fiber-based laminates designed for electrical insulation and mechanical applications. Engineered from high-quality polyester fiber and resin, these sheets provide excellent dielectric properties, thermal stability, and impact resistance, ensuring reliable performance in demanding industrial and electrical environments. They maintain electrical insulation under high voltage, offer superior thermal resistance, and exhibit low moisture absorption, making them suitable for varied temperature and humidity conditions. Mechanically, GPO-3 sheets resist impact, wear, and abrasion, combining electrical reliability with physical durability.


Features

  • High mechanical strength and impact resistance

  • Excellent dielectric properties and electrical insulation under high voltage

  • Superior thermal stability for high-temperature applications

  • Low moisture absorption for humid or fluctuating environments

  • Wear and abrasion resistant, durable for mechanical applications

  • Robust combination of electrical and mechanical performance


Applications

  • Electrical insulation components in transformers and switchgear

  • Mechanical parts requiring both strength and electrical insulation

  • High-voltage electrical circuits and devices

  • Industrial machinery and equipment exposed to heat, wear, or humidity

  • Environments requiring durable, long-lasting insulating materials


Technical Data Sheet

GPO-3 / UPGM203 / HM2471 UNSATURATED POLYESTER GLASS MAT SHEET
NoInspection ItemUnitTest ResultTest Method
1Tensile strengthMPa132ASTM D638-03
2Elastic modulus of tensileMPa1.03×104
3Flexural strengthMPa215ASTM D790-03
4Vertical compressive strengthMPa227ASTM D695-02a
5Vertical electrical strength,in the normal oil, fast boostMV/m20.7ASTM D149-97a
6Vertical layer to flashover voltage, in the air, fast boostKV27-
7Parallel layer breakdown voltage, in the normal oil, fast boostKV79-
8Arc resistances184ASTM D495-99
9Compared to the electric mark indexCTI600UL746A
10Insulation resistanceΩ6.1×1013ASTM D257-99
11Flame retardantgradeV-0UL94:2006
12Oxygen index%44.7ASTM D2863-10
13Oxygen index%0.13ASTM D570-98
14Densityg/cm31.83ASTM D792-00
15Coefficient of thermal expansion (20℃ -100℃) Parallel layer10-6/℃9.6ASTM D696-03
16Thermal conductivity (60℃)W/m·K0.652ASTM D518-10
17Thermal denaturation temperature(Tm1.8)≥155ISO 75-1:2004
Remarks:
1.Test specimen thickness for (1.66-1.74)mm of the fifth "vertical electrical strength" test.
2.Test specimen thickness for (2.07-2.15)mm of the sixth "Vertical layer to flashover voltage" test.


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