laminated products

Knowledge of Electrical Laminated Products

Electrical laminated products are insulating materials in layered structure, made of paper or cloth as a substrate, immersed or coated with different adhesives, then hot pressed or rolled, mainly including laminated boards, laminated tubes and rods……

Electrical laminated products are insulating materials in layered structure, made of paper or cloth as a substrate, immersed or coated with different adhesives, then hot pressed or rolled, mainly including laminated boards, laminated tubes and rods, capacitor bushing and other special profiles. The performance of laminated products depends on the properties of the substrate, adhesive and the molding process. Generally laminated products have excellent mechanical and electrical properties, heat resistance, oil resistance, mildew resistance, arc resistance, anticorona and other characteristics.

The commonly used substrates are wood fiber paper, cotton fiber paper, cotton cloth and alkali-free glass cloth. Wood fiber paper has good dipping properties, suitable for producing laminated paperboard, laminated rod and rolled laminated paper tube and capacitor bushing core. Cotton fiber paper is suitable for cold punching plate. Alkali-free glass cloth has high temperature resistance, electrical properties, mechanical properties and good chemical stability, but poor impregnation, cohesive force. While after surface treatment, the bonding strength and the shear resistance can be improved, suitable to be used as substrate for B, F and H class insulation laminated products. Cotton cloth laminated products has high bonding strength, wear resistance and easy to be machined, but the heat resistance, electrical properties and mechanical properties are poorer than that of glass cloth laminated products, and electrical properties and high frequency performance are poorer than paper laminated products.

laminated products     laminated products

The commonly used adhesives are phenolic resin, melamine resin, epoxy phenolic resin, organic silicone resin, polydiphenyl ether resin and polyimide resin. Different requirements for mechanical, electrical and arc resistance of laminated products decide different adhesives and adhesives content choice. The glass cloth laminated products made of epoxy phenolic resin have excellent electrical and mechanical properties and high thermal deformation temperature. The glass cloth laminated products made of organic silicone resin and diphenyl ether resin have high thermal mechanical properties, electrical properties and thermal deformation temperature. The commonly used molding processes are lamination, rolling and mould pressing.

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