Manufacturing method of flame-retardant self-adhesive impregnated thermosetting epoxy resin insulating tape

Abstract

The invention particularly relates to a manufacturing method of a flame-retardant self-adhesive impregnated thermosetting epoxy resin insulating tape, and belongs to the technical field of electricalinsulating materials. The technical problem to be solved is to improve the flame retardant property of a motor wrapping insulating material. The manufacturing method comprises the following steps: 1)preparing the following raw materials of an adhesive, by weight, 2-8 parts of polyvinyl formal resin, 18-27 parts of epoxy vinyl resin, 18-25 parts of a flame-retardant curing agent, 40-60 parts of aflame retardant, 0.5-4 parts of a dispersing agent, 0.3-2 parts of an anti-settling agent, 0.4-2 parts of an antifoaming agent, 0.3-1.8 parts of a leveling agent, 10-14 parts of a solvent and 2-7 parts of color paste; 2) preparing the adhesive; and 3, compounding the adhesive with a glass cloth. The flame-retardant and fireproof performance of the insulating tape prepared in the invention meets the HL3-level requirements of R22 and R23 in EN45545-2, the oxygen index is greater than 50%, the smoke density is 70%, and the smoke toxicity is 0.04%.

Description

technical field [0001] The invention belongs to the technical field of electrical insulating materials, and in particular relates to a method for manufacturing a flame-retardant self-adhesive impregnated thermosetting epoxy resin insulating tape. Background technique [0002] Rail transit, as one of the most extensive modes of transportation in the world, carries the safety of life and property of the vast number of passengers, and people attach great importance to safety risks. Fire safety is one of the most important safety performances. Through long-term practice, a series of methods for evaluating the combustion performance of materials have been developed. Among them, the concept of FIRST (F=flame spread, I=flammability / ignitability, R = heat release rate, S = smoke concentration, T = smoke toxicity, collectively called FIRST) is the most comprehensive and representative. However, in the rail transit industry, the level of fire risk is determined by the characteristics...

AI Technical Summary

Problems solved by technology

[0003] The invention overcomes the deficiencies in the prior art, provides a method for manufacturing a flame-retardant self-adhesive impregnated heat-cured epoxy resin insulating tape, and solves the problem of poor flame-retardant performance or low fire-proof performance of the current motor wrapping insulation materials. Technical problems causing motor fire, fire spread, burning smoke, etc.