Processing method of fire resistant mica tape and structure

Abstract

The invention relates to a processing method of fire resistant mica tapes, which is characterized in that a diluted peptizing agent is uniformly immersed into the front and reverse faces of fiber cloth, then mica paper is flatly spread on the surface of a mucilage layer on the upper side of fiber cloth, thus forming a mica layer which is again put in an adhesive groove so as to cause the peptizing agent to uniformly immerse into the surface of the mica layer, then the fiber cloth is flatly spread on the surface of the mucilage layer formed on the upper side of the mica layer, thereby obtaining mica tapes without composite forming; and then cut and drum are carried out on the mica tapes after drying and then the preparation is completed. The structure of the mica tapes prepared by using the method is characterized by at least three fiber layers, at least two mica layers and at least one mica layer arranged between the two fiber layers. The preparation method can effectively increase the viscosity between the fiber layer and mica layer which are not separated, and the method not only improves the whole fireproofing and insulating property leading to more stable fireproofing property but also has the advantages of impact resistance, water durability and the like.

Description

technical field [0001] The invention relates to a fire-resistant insulating material, in particular to a processing method and structure of a fire-resistant mica tape. Background technique [0002] Mica tape is an important material for the production of fire-resistant cables. It is mainly made of a layer of glass fiber cloth and a layer of mica bonded and then dried. It has excellent high temperature resistance and combustion resistance. The mica tape has good flexibility under normal conditions. , suitable for the main fire-resistant insulation layer in various fire-resistant wires and cables. [0003] Due to the defects of the design structure and form, at least the traditional mica tape has the following disadvantages when used: because of its own insufficient fire resistance, it is necessary to wrap more layers of mica tape on the surface of the fireproof insulation equipment in order to pass Increase the winding thickness of the mica tape, thereby improving the fire-r...

AI Technical Summary

Problems solved by technology

However, due to the disadvantages of mica tape processing equipment and processing technology, the fire resistance strength and tensile toughness of the processed mica tape are not high, so when winding, as the thickness increases, it is easy to cause fracture, loosening, mica layer The separation between other layers can not be completely matched, which further affects the overall fire-resistant insulation performance of the product, resulting in unstable quality of a large number of fire-resistant cables, and increases the processing cost of the manufacturer, which is also the reason for the high price of fire-resistant cables.

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