High temperature resistant electrical soft composite material and manufacturing method thereof

Abstract

The invention discloses a high temperature resistant electrical soft composite material and a manufacturing method thereof. The invention is characterized in that: the high temperature resistant electrical soft composite material is a two-, three- or four-layer high temperature resistant electrical soft composite material comprised of a thin film layer, an adhesive layer and a synthetic fiber paper layer; the adhesive layer is prepared by mixing 115 to 230 weight parts of hydroxy-terminated prepolymer, 30 to 83 weight parts of multifunction isocyanate prepolymer, 70 weight parts of polyglycerol-modified ureido-ene resin, 150 to 300 weight parts of solvent; after an adhesive is applied on a thin film or synthetic fiber paper, the thin film or synthetic fiber paper is delivered to a drying channel to pass through an area, an area II at and an area II at 50 to 120 DEG C respectively and at a vehicle speed of 2 to 20 m / min to remove the solvent; then the thin film or synthetic fiber paper is cooled first to room temperature and then to 80 DEG C and is combined with the synthetic fiber paper or the thin film by hot rolling; the combined product is wounded and heated to 140 DEG C from room temperature for aging for 8 to 72 hours; and thus, the product is obtained. The product of the invention, which has high performance, can be used for motor element insulation, inter-winding insulation, gasket insulation and air-immersed transformer interlayer insulation.

Description

technical field

[0001] The invention belongs to layered products and a manufacturing method thereof, and relates to an electrical soft composite material and a manufacturing method thereof. In particular, it relates to a class of slot insulation materials for motor and electrical products—an electrical soft composite material with excellent thermal stability and its production that requires no delamination, no foaming, and no glue flow in the 220°C, 3h hot-state adhesive test. method. The prepared electrical soft composite material product is especially suitable as a material for electric motor slot insulation, turn-to-turn insulation, liner insulation and dry-type transformer interlayer insulation. Background technique

[0002] In the prior art, the adhesive composition of electrical flexible composite materials is generally composed of 20 to 100 parts by weight of polyester polyurethane prepolymer, 10 parts by weight of multifunctional isocyanate prepolymer, with or witho...

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