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

An autoclave forming and composite material technology, which is applied in textiles, papermaking, non-woven fabrics, etc., can solve the problems of poor air permeability, complex air felt technology, affecting composite materials, etc., and achieve excellent air permeability at room temperature. , low cost, simple process effect

Inactive Publication Date: 2014-04-23
SHANGHAI LEADGO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The high-temperature, high-pressure and high-permeability air felt for autoclave molding composite materials in this embodiment is made of blended spinning of 30% polyester staple fibers, 65% modified polyester staple fibers and 5% anti-lint shedding staple fibers. Among them, the anti-lint staple fiber is PE fiber, and the modified polyester staple fiber is polyester staple fiber. The polyester staple fiber is obtained by cutting polyester filament. The cutting process includes steam drawing, crimping, heat setting and cutting and packaging. Polyester staple fiber has the advantages of outstanding pressure resistance, strong fiber cohesion, and is not easy to break when needling. The specification of polyester staple fiber, modified polyester staple fiber and anti-shedding staple fiber is 21dtex×65mm.

[0023] Its preparation method comprises the following steps:

[0024] (1) Proportion polyester staple fiber, modified polyester staple fiber and anti-shedding staple f...

Embodiment 2

[0030] An air felt with high temperature and pressure resistance and high air permeability for autoclave forming composite materials in this embodiment is made of blended spinning of 5 polyester staple fibers, 95% modified polyester staple fibers and 0% lint-resistant staple fibers. Among them, the anti-lint staple fiber is PE fiber, and the modified polyester staple fiber is polyester staple fiber. The polyester staple fiber is obtained by cutting polyester filament. The cutting process includes steam drawing, crimping, heat setting and cutting and packaging. Polyester staple fiber has the advantages of outstanding pressure resistance, strong fiber cohesion, and is not easy to break when needling. The specifications of polyester staple fiber, modified polyester staple fiber and anti-shedding staple fiber are 5dtex×65mm, 20dtex×80mm, 4dtex×100mm.

[0031] Its preparation method comprises the following steps:

[0032] (1) Proportion polyester staple fiber, modified polyester s...

Embodiment 3

[0038] An air felt with high temperature and high pressure resistance and high air permeability for autoclave forming composite materials in this embodiment is made of blended spinning of 50% polyester staple fiber, 40% modified polyester staple fiber and 10% anti-lint shedding staple fiber. Among them, the anti-lint staple fiber is PE fiber, and the modified polyester staple fiber is polyester staple fiber. The polyester staple fiber is obtained by cutting polyester filament. The cutting process includes steam drawing, crimping, heat setting and cutting and packaging. Polyester staple fiber has the advantages of outstanding pressure resistance, strong fiber cohesion, and is not easy to break when needling. The specification of polyester staple fiber, modified polyester staple fiber and anti-shedding staple fiber is 40dtex×100mm.

[0039] Its preparation method comprises the following steps:

[0040] (1) Proportion polyester staple fiber, modified polyester staple fiber and a...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4382D04H1/46
Inventor 邓鹏鹏胡潇傅武兴胡仲杰岑婵芳俞长青
Owner SHANGHAI LEADGO TECH
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