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Summary: Phenolic resin is the earliest thermosetting resin to be industrialized.

Phenolic resin is the earliest thermosetting resin to be industrialized. Due to its excellent heat resistance, insulation, flame retardancy and mechanical properties, it is widely and irreplaceably used in the plastic industry. It is often compounded with fillers such as wood powder, glass fiber, and mica to produce various phenolic molding plastics, which are used to manufacture electrical insulation components such as electrical switches, sockets, and instrument casings, meeting the insulation and flame retardancy requirements of the electrical industry.