Flame-retardant fiber impregnating composition

Abstract

The invention discloses a flame-retardant fiber impregnating composition. The flame-retardant fiber impregnating composition is characterized by being prepared from, by weight, 15-40 parts of liquid rubber, 10-25 parts of isocyanate, 5-15 parts of plasticizers, 5-12 parts of liquid petroleum tackifying resin, 3-6 parts of N-hydroxymethyl-3-(dimethoxyphosphonyl) propionamide and 5-10 parts of flame-retardant resin. According to the flame-retardant fiber impregnating composition, the advantages of resisting high temperature, being flame-retardant and high in bonding strength and the like are achieved, and due to the fact that the viscosity is small and the wettability is good, the good impregnating property on fibers is achieved; processed fiber yarn is smooth in surface and easy to weave and wind, the good bonding property with rubber and the smooth surface are achieved, no solvent is volatilized and energy consumption is low in the whole processing process, and the wide market value and the great market potential are achieved.

Description

Technical field [0001] The invention belongs to the technical field of composite materials, and specifically relates to a flame-retardant fiber impregnation composition. Background technique [0002] Many rubber industrial products, such as tires, hoses, and conveyor belts, require fabric skeleton materials to obtain high strength and dimensional stability. The bonding performance of the skeleton material and rubber is the key to the excellent performance of the product, but the molecular chain of the fiber material is The lack of active groups for bonding between rubber molecular chains results in poor adhesion between the fiber material and rubber. In order to obtain good adhesion between the skeleton fiber material and rubber, the surface of the fiber needs to be impregnated. At present, the method of impregnating fiber surface mainly adopts resorcinol-formaldehyde latex (RFL), epoxy resin / blocked isocyanate for one-bath, two-bath or three-bath impregnation, and the impregnate...

AI Technical Summary

Problems solved by technology

[0002] Many rubber industrial products, such as tires, rubber hoses and conveyor belts, require fabric skeleton materials to obtain high strength and dimensional stability. There is a lack of active groups that produce bonding between the rubber molecular chains, resulting in poor adhesion between the fiber material and rubber. In order to obtain good adhesion between the skeleton fiber material and rubber, it is necessary to impregnate the surface of the fiber

At present, the surface impregnation treatment of fibers mainly uses resorcinol-formaldehyde latex (RFL), epoxy resin / blocked isocyanate for one-bath, two-bath or three-bath impregnation. The impregnated fiber material and rubber However, there are the following problems: First, the surface of the fiber impregnated by the traditional system is not smooth, and a large friction force will be generated with the equipment during the later weaving and winding of the fiber, which is easy to cause breakage. The thread and glue drop require regular cleaning of weaving, winding and other equipment, which affects production efficiency and product quality

In the process of fiber impregnation and heat treatment, volatile substances such as solvents and formaldehyde volatilize, causing great harm to the environment and operators; third, the fiber bonding layer impregnated with RFL system needs to be treated at 200-240°C under high temperature, This not only consumes a lot of energy, but the process is complicated and takes a long time

If the moisture is not completely evaporated, the residual moisture will seriously affect its adhesive performance

[0003] Materials such as tires, hoses, and conveyor belts are generally elastic composites composed of rubber and skeleton materials. Because rubber materials are easy to burn, tires may burn in some special operating environments, endangering the safety of vehicles and personnel.

At present, the materials of high-performance resin composite materials used in domestic and foreign fields are relatively single, and they have the disadvantages of high brittleness, low service temperature, low bonding strength, and poor flame retardancy.