GPO-3 white color fiberglass-reinforced thermoset laminate

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6 year

Product details

GPO-3 is essentially a rigid laminate—also known as UPM203—composed primarily of alkali-free glass fiber mat impregnated with unsaturated polyester resin through a specific manufacturing process to create a high-temperature-resistant insulating material. Due to its excellent flame-retardant properties, which help safeguard property, it is widely used in the electrical industry, as well as in low-voltage electrical equipment and the automotive sector.

GPO-3 is an unsaturated polyester fiberglass mat laminate characterized by exceptional heat and impact resistance. The material is easy to cut and drill, making it highly convenient to process; importantly, the laminate retains its insulating properties—providing reliable, independent insulation—even after undergoing high-temperature compression and extrusion. It exhibits strong flame retardancy at high temperatures and ensures stable operation in demanding environments, making it a highly sought-after material across various industrial sectors.

This material holds UL 94 V-0 flame retardancy and SGS certifications, featuring an arc resistance time exceeding 180 seconds and a Comparative Tracking Index (CTI) greater than 600V [1] [3] [5]. It withstands temperatures up to 180°C (short-term) and maintains stable mechanical strength at elevated temperatures. Suitable for mechanical forming processes such as stamping, drilling, and turning, it can be fabricated into sheets, tubes, and complex structural components. Key applications include insulation parts for low-voltage electrical equipment—such as circuit breaker arc chutes, switchgear partitions, and motor slot wedges—as well as components for the automotive industry.

GPO-3 laminate is a rigid, sheet-like insulating material manufactured by impregnating alkali-free glass fiber mats with an unsaturated polyester resin paste—along with specific additives—and then hot-pressing the assembly. Widely used in the mechanical and electrical industries, this material maintains excellent electrical performance even in high-humidity environments. It offers superior flame retardancy and is commonly available in colors such as white and reddish-brown. GPO-3 laminates offer the following specific performance advantages:

1. Electrical Insulation 　　

Like all electrical insulating laminates, GPO-3 serves as an excellent insulator; due to its unique properties, it is widely used in the field of electrical engineering.

2. Flame Retardancy 　　

Thanks to its unique composition, the material does not burn in the event of a fire, providing excellent flame-retardant capabilities.

3. Mechanical Strength 　　

Constructed from specialized materials, GPO-3 laminates do not shatter under high mechanical stress.

4. Heat Resistance 　　

GPO-3 laminates exhibit excellent stability during temperature increases, withstanding high-stress conditions within temperature ranges of 120–210°C for electrical applications and 130–210°C for mechanical applications.

5. Ease of Fabrication 　　

GPO-3 laminates can be easily processed using methods such as punching, drilling, machining, shearing, and sanding.

GPO3 insulation board exhibits excellent electrical properties.

It performs exceptionally well in terms of insulation resistance. Insulation resistance is a key indicator of a material's ability to prevent current leakage; GPO3 insulation board possesses high insulation resistance, effectively minimizing leakage and thereby ensuring the safety and stability of electrical equipment during operation while preventing leakage-related accidents.

It also has a relatively low dielectric constant. The dielectric constant reflects a material's ability to store electrical energy within an electric field; a low dielectric constant means that GPO3 insulation board does not store excessive electrical energy under the influence of an electric field, thereby reducing energy loss and helping to improve the energy conversion efficiency of electrical equipment.

GPO3 insulation board also exhibits excellent voltage withstand capabilities. It can withstand high voltages without undergoing dielectric breakdown, making it suitable for various high-voltage electrical applications—such as high-voltage switchgear and motor insulation—where it provides reliable insulation protection for electrical equipment.

Furthermore, the board features a low dielectric loss factor. This factor indicates the level of electrical energy loss within the material when subjected to an alternating electric field; a low value signifies minimal energy loss, thereby enhancing efficiency and stability in electrical applications.

Regarding frequency adaptability, GPO3 insulation board maintains excellent electrical performance across a wide frequency range. Whether in low-frequency or high-frequency environments, it effectively provides insulation and ensures the normal operation of electrical equipment.

In summary, thanks to its outstanding electrical properties—including excellent insulation resistance, low dielectric constant, high voltage withstand capability, low dielectric loss factor, and broad frequency adaptability—GPO3 insulation board is widely used in the electrical industry.

GPO-3 (also known as UPGM-203) is a rigid insulating material produced by hot-pressing alkali-free glass fiber mat impregnated with unsaturated polyester resin. Characterized by UL 94 V-0 flame retardancy, arc resistance exceeding 180 seconds, and high mechanical strength, it is primarily used for electrical insulation structural components that demand exceptional safety and heat resistance.

Key Application Areas

1. Low-voltage electrical appliances and circuit breakers: Serving as critical insulating components, it is widely used for phase barriers, arc-chute barriers, safety shutters, and spacers in air circuit breakers (ACBs) and molded case circuit breakers (MCCBs), effectively interrupting arcs and isolating conductive parts.

2. Electric motor manufacturing: Used to fabricate motor armature components, stator slot wedges, movable covers, carbon brush holders, and stator shims/spacers, maintaining stable mechanical support and insulation performance in high-temperature and high-humidity environments.

3. Switchgear and Power Distribution Systems: Used in switchgear partition systems (front, rear, and phase barriers), busbar clamps, terminal blocks, and contact supports, ensuring dimensional stability of the power distribution structure within the 130–210°C temperature range.

4. Rail Transit and Automotive Electronics: Utilized for insulating barriers, brackets, and connector components in the electrical systems of trains and automobiles; its low moisture absorption and vibration resistance ensure safe operation under demanding conditions.

5. Other Industrial Applications: Includes transformer coil bobbins, high-temperature relays, cable tray insulation pads, and specialized insulating structural components requiring precision machining (such as stamping and drilling).

Key Selection Criteria

In practical applications, particular attention should be paid to the material's Comparative Tracking Index (CTI > 600V) and density (1.81–1.83 g/cm³). Additionally, verify the existence of independent UL certification to distinguish the product from inferior alternatives and to prevent delamination or the release of toxic gases at high temperatures.