Comparison Of Comprehensive Performance Between GPO-3 And SMC

SMC, or sheet molding compound, is also an insulating material. It was first developed in Europe in the early 1960s, ...

SMC, or sheet molding compound, is also an insulating material. It was first developed in Europe in the early 1960s, and then the United States and other developed countries also introduced this technology and developed this type of process in their own countries. Sheet molding compound, like laminate, is also a type of composite insulating material. my country only introduced this process technology in the late 1980s. It is mainly composed of SMC special yarn, unsaturated resin, and various fillers. SMC is widely used in transportation vehicles, construction, electronics or electrical industries due to its superior electrical properties and corrosion resistance.

In fact, these two types of insulating materials are different. The scope of application involved is also certain, and there is no common overlap between them.

GPO-3 is widely used as an insulator in motors and electrical equipment, and can be used in circuit breakers, DC motors, and AC contactors. It uses glass fiber felt as a reinforcing material. It has a high elastic modulus, good rigidity, and excellent mechanical processing performance. Even after processing, it does not delaminate or split. In terms of insulation, its surface resistivity and volume resistivity are relatively high, and the insulation performance is good.

The elastic modulus of SMC is not as good as that of GPO-3 laminate, and it has a poor effect on unsaturated polyester. In addition, its elastic modulus is low, it is easy to deform, and its rigidity and mechanical processing performance are relatively poor. In terms of insulation, the insulation resistance of SMC is very small compared to GPO-3. SMC is mainly used in the electrical industry, electrical components, and motor parts. Some electrical housings, switch boxes, instrument panel covers, insulators, etc. are made of SMC as the main material.