Heat-resisting, high-pressure-resisting and high-air-permeability ventilated felt for autoclave forming composite materials and preparation method thereof

Abstract

The invention discloses a heat-resisting, high-pressure-resisting and high-air-permeability ventilated felt for autoclave forming composite materials. The heat-resisting, high-pressure-resisting and high-air-permeability ventilated felt for the autoclave forming composite materials is formed by blending 5-50% of polyester staple fiber, 40-95% of modified polyester staple fiber and 0-10% anti-slip staple fiber. The heat-resisting, high-pressure-resisting and high-air-permeability ventilated felt for the autoclave forming composite materials, is high in usability, slip-proof, good in ventilation performance at normal temperature and significant in air permeability when applied to an autoclave, can guarantee compact forming of composite material products and has a maximum usage temperature up to 230 DEG C and a bearable pressure up to 0.8 Mpa. The preparation method of the heat-resisting, high-pressure-resisting and high-air-permeability ventilated felt for the autoclave forming composite materials is simple and low in cost, most of the raw materials can be purchased on the market, the production can be performed on common knitting machines and accordingly small equipment investment can be obtained.

Description

technical field [0001] The invention relates to the technical field of autoclave forming composite materials, in particular to a high temperature, high pressure and high air permeability air felt for autoclave forming composite materials and a preparation method thereof. Background technique [0002] Vacuum bag autoclave molding is a molding method widely used in composite material parts. The laid-up blanks are formed into a vacuum system by encapsulation, and then the low molecular volatiles and Gas entrapment in the prepreg, resulting in a dense composite part with acceptable internal quality. Vacuum bag autoclave molding usually uses a single-sided mold. After molding, the surface quality and shape of the molded surface are guaranteed by the mold, and the surface quality and shape of the non-moulded surface need to be supplemented by later machining, grinding, painting and other processes. Finish. [0003] In order to make the film surface incompatible with composite ma...

AI Technical Summary

Problems solved by technology

At present, the air permeability of air felt is not good, and the phenomenon of shedding often occurs, which affects the composite material.

Moreover, the process for preparing air felt is relatively complicated, and the equipment cost for one-time investment is high