Production method for curing mica tape based on EB irradiation

Abstract

The invention relates to a production method for curing a mica tape based on EB irradiation, which comprises the following steps: S1, taking proper glass fiber cloth, coating a first adhesive on the glass fiber cloth in a roller coating manner, and uniformly permeating the glass fiber cloth, the viscosity of the first adhesive being 1000-20000cps; s2, slowly and flatly placing mica paper on the glass fiber cloth, and uniformly permeating; s3, a second adhesive is sprayed on the surface of the mica paper in a spraying mode, uniform permeation is achieved, and the viscosity of the second adhesive is 10-1000 cps; s4, EB irradiation curing is carried out, and the finished mica tape is obtained. The bonding strength between the glass fiber cloth and the mica paper can be ensured by adopting the first adhesive with higher viscosity, the adsorption of the mica paper to the second adhesive can be ensured by adopting the second adhesive with lower viscosity, so that the use amount of the adhesive is greatly reduced compared with the previous use amount, and meanwhile, the roller coating and the spray coating are respectively matched for coating, so that the use amount of the adhesive is greatly reduced. The production efficiency is improved and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of production and manufacture of mica tapes, in particular to a production method of mica tapes based on EB irradiation curing. Background technique [0002] Mica tape is an insulating material with excellent high temperature resistance and combustion resistance, which is made of mica paper and glass fiber cloth and other reinforcing materials with appropriate adhesives. Due to the good flexibility and high temperature resistance of mica tape, it is widely used in the fire-resistant insulating layer of various fire-resistant electromagnetic cables and coils. The current mainstream method of producing mica tapes is to dilute the adhesive with a large amount of toluene solvent, then impregnate the reinforcing material so that the reinforcing material can be compounded with the mica paper, and then bake the compounded material to remove the solvent. It is made by winding and slitting; and toluene is easily vol...

AI Technical Summary

Problems solved by technology

The current mainstream method of producing mica tape is to dilute the adhesive with a large amount of toluene solvent, then impregnate the reinforcing material so that the reinforcing material can be compounded with the mica paper, and then bake the compounded material to remove the solvent. It is made by winding and cutting; while toluene is easy to volatilize, in the production process, once the concentration of toluene is too high, there may be dangers such as fire and personnel poisoning, and the recovery rate of toluene is less than 30%. The fuel required for friendly handling drives up the cost even further

[0003] At present, mica tapes produced by EB radiation have appeared on the market. The advantage is that toluene is no longer used as a diluent, and the curing method is changed from the original heat curing method to EB radiation curing. Adhesive, its viscosity is high, and the porous structure of mica paper cannot balance the amount of adhesive absorbed by mica paper and the interface between mica paper and glass fiber cloth. The original impregnation process is not suitable for production

If more monomer resin is used for dilution, the proportion of resin with higher viscosity of multifunctional groups in the adhesive between glass fiber cloth and mica paper will be lower, resulting in insufficient interface bonding strength, and the finished mica tape cannot Through performance tests such as wrapping and stretching; on the other hand, when the viscosity of the adhesive is moderate, due to the unique porous structure of the mica paper, it will absorb a large amount of adhesive, which will increase the cost of the production material several times.

Images