
SMC Insulation Sheet
SMC Insulation Sheet refers to Sheet Molding Compound, which is mainly composed of special yarn for SMC, unsaturated polyester resin and various fillers. With superior electrical performance and corrosion resistance, SMC materials are widely applied in transportation vehicles, construction, electronics, electrical engineering and other industries.
GPO-3 insulation sheet
GPO-3 insulation sheet, also named UPGM-203, is a rigid sheet insulating material manufactured by impregnating non-alkali glass fiber mat with unsaturated polyester resin paste plus corresponding additives under hot pressing. Designed for mechanical and electrical applications, GPO-3 insulation sheet maintains stable electrical properties under high humidity conditions and favorable mechanical performance at medium temperatures. It features inherent flame retardancy, excellent arc resistance and outstanding tracking resistance.
There are fundamental differences between these two types of insulating materials, and their applicable fields are distinct without overlapping application scenarios. GPO-3 is extensively adopted as insulating components for motors and electrical equipment, such as circuit breakers, DC motors and AC contactors. It takes glass fiber mat as reinforcing filler, delivering high elastic modulus and great rigidity alongside excellent machinability. No delamination or cracking occurs after machining. In terms of insulation performance, it owns relatively high surface resistivity and volume resistivity for reliable insulation effect.
SMC material has a lower elastic modulus than GPO-3 laminated sheet and exhibits poor compatibility with unsaturated polyester resin. Characterized by low elastic modulus, SMC tends to deform easily, with inferior rigidity and machinability. Meanwhile, its insulation resistance is far lower compared with GPO-3. SMC is mainly used in electrical industry, electrical components and motor parts, including electrical enclosures, switch boxes, instrument panel covers, insulators and other products.
Yilong provides high-quality GPO-3 (UPGM-203) insulation sheets and SMC insulation sheets with custom cutting and precision processing services for all electrical insulation projects. If you require material performance comparison, sample testing or bulk purchasing solutions, please reach out to us.
Email: Yilong@Yilonginsulation.com
Website: www.Yilonginsulation.com
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