A kind of dipped flame-retardant canvas and its manufacturing method

Abstract

The invention discloses a dipped flame-retardant canvas, comprising warp threads and weft threads, the warp threads are ply aramid fibers (3), and the weft threads are ply-strand polyester fibers (1) and ply-ply carbon fibers (2) arranged at intervals ). The invention also provides a manufacturing method of the dipped flame-retardant canvas. The dipped flame-retardant canvas provided by the present invention usually has an oxygen content of 21% in the air, while the limiting oxygen index of the aramid fiber is greater than 28%. sex. This inherent characteristic derived from its own molecular structure makes aramid fiber permanently flame-retardant, and has the reputation of "fireproof fiber"; due to the poor toughness of carbon fiber in weft and weft, it is reinforced with polyester fiber to meet the requirements of flexion effect And weft tensile strength requirements, and contribute to the improvement of dipping adhesive strength. The carbon content of carbon fiber is generally more than 90%, and it has good flame retardancy, and there will be no smoke and flame even in high-oxygen combustion.

Description

technical field [0001] The invention relates to the technical field of conveyor belts, in particular to a rubber-dipped flame-retardant canvas and a manufacturing method thereof. Background technique [0002] At present, the development of flame-retardant canvas for conveyor belts is still in its infancy at home and abroad. The flame-retardant canvas products for conveyor belts in my country only add some flame retardants to the glue for dipped canvas to increase the oxygen index of the canvas when it burns. Unimpregnated canvas has no flame retardant effect. Even the canvas soaked in flame retardant glue is only smaller than the ordinary canvas of the same type when it burns. Flame retardant in the sense. [0003] At present, although the EP (Ethylene propylene, ethylene-propylene rubber) canvas impregnated with flame-retardant mortar can be used to produce conveyor belts that meet the MT830-1999 standard through the use of high-efficiency flame-retardant adhesives, all conv...

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