Flame-retardant insulating impregnated base paper production process

Abstract

The invention discloses a flame-retardant insulating impregnated base paper production process which comprises a production system, the production system comprises a hydrapulper, an inclined screen is arranged at the output end of the hydrapulper, a non-beating pool is arranged at the output end of the inclined screen, a first double-disc mill is arranged at the output end of the non-beating pool, a first delivery pump is arranged between the non-beating pool and the first double-disc mill, and a half pulp pool is arranged at the output end of the first double-disc mill. The flame-retardant insulating impregnated base paper produced by adopting the process is high in mechanical strength, good in insulating property, uniform in quantification, low in density, good in absorptivity, small in impregnation shrinkage, not easy to fold and break, good in impregnation processability, and capable of being well suitable for processing and production of flame-retardant insulating paper. By adopting milled pulp with a relatively low beating degree, the low-linear-pressure squeezing and calendaring process has the advantages of reduced motor power, low power consumption per unit product, high dipping processing yield, reduction of waste paper recycling consumption, energy conservation and environmental friendliness.

Description

technical field [0001] The invention relates to the technical field of production of impregnated base paper, in particular to a production process of flame-retardant insulating impregnated base paper. Background technique [0002] Flame retardant insulating impregnated base paper is suitable for impregnating production and processing of flame retardant insulating paper. Flame-retardant insulating paper not only requires high mechanical strength and good electrical properties, but also requires good flame-retardant properties. Therefore, it is required that the impregnated base paper has good electrical properties, uniform ration, low density, good absorption, and a high loading rate of flame retardants during impregnation, so as to ensure the insulation performance and flame retardancy of the impregnated product. [0003] At present, the production process uses unbleached kraft wood pulp raw materials, which are manufactured through shredding, high-knocking degree refining,...

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Problems solved by technology

[0003] At present, the production process uses unbleached kraft wood pulp raw materials, which are manufactured through shredding, high-knocking degree refining, garden net forming, high-line press dehydration, high-line pressure calendering after drying, and other processes. The flame retardant insulation impregnated base paper has high density and poor absorption, the flame retardant cannot be well absorbed by the base paper during impregnation, the loading rate of the flame retardant is low, the finished product has good mechanical and electrical properties, but the flame retardant effect is poor

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