Brief introduction about insulation composite products

The insulating composite product is a composite material having an electrical insulating function by compounding an insulating filler with a high polymer. It can be divided into two major categories of power plant insulation and electronic device ……

The insulating composite product is a composite material having an electrical insulating function by compounding an insulating filler with a high polymer.

It can be divided into two major categories of power plant insulation and electronic device insulation. The first type is laminates, tubes, and short-fiber molded parts made by compounding mica (sheet, powder), wood fiber or synthetic fiber paper, cotton cloth, asbestos fiber or paper, and glass fiber or cloth with phenolic, epoxy, unsaturated poly, melamine, polyimine and polyaralkyl. In addition to electrical insulation properties, it also requires temperature resistance, moisture resistance, dimensional stability, certain mechanical properties and flame retardancy. The second type mainly includes a substrate of a copper clad circuit board and electronic packaging material containing a filler. The rigid substrate of the circuit board is made of glass fiber, polyaluminum amide fiber, etc., which is reinforced with phenolic, epoxy, polyimine, polytetrafluoroethylene, etc., and the flexible substrate is directly coated with polyester, polyimide film. In addition, a composite material composed of a single-layer insulating cloth and a flexible epoxy resin is used. In addition to the same requirements as those used in electrical engineering, the insulating material for a circuit board substrate has a good dielectric property and a small thermal expansion coefficient. In particular, a substrate for a high-frequency circuit needs to have a resin such as polybutadiene or polytetrafluoroethylene having a relative dielectric constant and a loss factor as a matrix.

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