Gum dipping flame retarding canvas and manufacturing method thereof

Abstract

The invention discloses gum dipping flame retarding canvas which comprises warps and wefts, wherein the warps are twisted aramid fibers (3), and the wefts are stranded dacron fibers (1) and stranded carbon fibers (2) that are arranged at intervals. The invention further provides a manufacturing method of the gum dipping flame retarding canvas. According to the gum dipping flame retarding canvas, an oxygen content of air is 21% generally, while the limit oxygen indices of the aramid fibers are greater than 28%, so that the aramid fibers are fire-retardant, cannot be burnt in the air or support combustion, and have self-extinguishment ability. The aramid fibers are flame-retardant permanently due to inherent characteristics of molecular structures of the aramid fibers, and have a good name of 'fire-proof fibers'; for the wefts, the stranded dacron fibers are adopted for reinforcement due to poor tenacity of the carbon fibers, so as to meet yield effect requirements and weft tension strength requirements; and gum dipping adhesion strength can be improved. Carbon contents of the carbon fiber do not exceed 90% generally, and the carbon fibers are good in flame retardancy, and cannot generate smoke and flame during 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 con...

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