Mica tape and preparation method thereof

Abstract

The invention relates to a cable fire-resistant insulation material, and particularly relates to a mica tape and a preparation method thereof. The mica tape comprises mica paper and glass fiber cloth. The glass fiber cloth is arranged on upper and lower surfaces of the mica paper. The mica paper and the glass fiber cloth on upper and lower surfaces of the mica paper are bonded together through glue materials. Each glue material comprises the active ingredients of an adhesive of organic silicon, a diluent of toluene and a curing agent. The weight ratio of the adhesive, the diluent and the curing agent is 3:20:1. The weight sum of the adhesive, the diluent and the curing agent accounts for 13 to 18% of the weight of the glue materials. The preparation method of the mica tape has the steps of glue material configuring, dip coating, compositing, drying, cooling, rewinding and slitting. The product has the advantages of easy manufacture, good fire-resistant insulation performance, strong shock-resistant performance and low processing cost.

Description

technical field [0001] The invention relates to a fire-resistant insulating material for cables, in particular to a mica tape and a preparation method thereof. Background technique [0002] With the rapid development of the economy, the market demand for cables is increasing day by day. The refractory insulating material commonly used in cable production is mica tape, and the quality of the refractory insulating material directly or indirectly affects the performance of the cable. The existing mica tape on the market is mainly made of a layer of glass fiber cloth bonded with a layer of mica and then dried. It has excellent high temperature resistance and combustion resistance. The mica tape has good flexibility under normal conditions and is suitable for It is the main fire-resistant insulation layer in various fire-resistant wires and cables. However, due to the lack of fire resistance of the existing mica tape itself, it is necessary to wrap more layers of mica tape on t...

AI Technical Summary

Problems solved by technology

However, due to the lack of fire resistance of the existing mica tape itself, it is necessary to wrap more layers of mica tape on the surface of the fireproof insulation equipment during use, and strive to improve the fire resistance and fire resistance level of the cable by increasing the winding thickness of the mica tape. standard requirement

However, due to the disadvantages of mica tape processing equipment and processing technology, the fire resistance and tensile toughness of the processed mica tape are not high. Detachment occurs between other layers and cannot be completely matched, which affects the fire-resistant insulation performance of the cable, resulting in unstable product quality and increased processing costs

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