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A kind of ultra-high temperature and high pressure resistant air felt with high air permeability and preparation method thereof

A technology of ultra-high temperature and air felt, which is applied in textiles, papermaking, non-woven fabrics, etc. It can solve the problems of affecting the quality of composite materials, shedding, and poor air permeability of air felt, and achieves excellent air permeability at room temperature and air conduction. The effect of outstanding ability and low cost

Active Publication Date: 2020-03-20
SHANGHAI LEADGO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the high-temperature and high-pressure air permeability of air felt is not good, and hair loss often occurs, which affects the quality of composite materials

Method used

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  • A kind of ultra-high temperature and high pressure resistant air felt with high air permeability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An air felt with ultra-high temperature and high pressure resistance and high air permeability is prepared by needle punching mixed with 70% modified nylon 66 staple fiber and 30% polyester staple fiber. The modified nylon 66 short fiber is prepared by twin-screw blending, extruding, granulating, and spinning after nylon 66 chip, heat stabilizer, and antioxidant in a certain ratio of 99:0.5:0.5. The specific preparation method of this embodiment comprises the following steps:

[0029] (1) After unpacking the modified nylon 66 staple fiber and polyester staple fiber, they were manually added to the bins of two unpacking machines. The polyester staple fiber was prepared by melt direct spinning, and the modified nylon 66 staple fiber and polyester staple fiber were The specification of staple fiber is 3dtex×30mm. The bale opener is mixed according to the set weight percentage ratio of 7:3 and then added to the pre-opener for preliminary loosening. The speed of the corner ...

Embodiment 2

[0036] An air felt with ultra-high temperature and high pressure resistance and high air permeability is prepared by needle punching mixed with 80% modified nylon 66 staple fiber and 20% polyester staple fiber. The modified nylon 66 staple fiber is prepared by twin-screw blending, extruding, granulating, and spinning after nylon 66 chip, heat stabilizer, and antioxidant in a certain ratio of 97:2:1. The specific preparation method of this embodiment comprises the following steps:

[0037] (1) After unpacking the modified nylon 66 staple fiber and polyester staple fiber, they were manually added to the bins of two unpacking machines. The polyester staple fiber was prepared by melt direct spinning, and the modified nylon 66 staple fiber and polyester staple fiber were The specification of staple fiber is 12dtex×45mm. The unpacking machine is mixed according to the set weight percentage ratio of 8:2 and then added to the pre-opening machine for preliminary loosening. The speed o...

Embodiment 3

[0044] An air felt with ultra-high temperature and high pressure resistance and high air permeability is prepared by needle punching mixed with 50% modified nylon 66 staple fiber and 50% polyester staple fiber. The modified nylon 66 short fiber is prepared by twin-screw blending, extruding, granulating, and spinning after nylon 66 chip, heat stabilizer, and antioxidant in a certain ratio of 97:0.5:2.5. The specific preparation method of this embodiment comprises the following steps:

[0045] (1) After unpacking the modified nylon 66 staple fiber and polyester staple fiber, they were manually added to the bins of two unpacking machines. The polyester staple fiber was prepared by melt direct spinning, and the modified nylon 66 staple fiber and polyester staple fiber were The specification of staple fiber is 20dtex×65mm. The unpacking machine is mixed according to the set weight percentage ratio of 5:5 and then added to the pre-opening machine for initial loosening. The speed of...

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Abstract

The invention discloses an ultra-temperature and high-pressure resistant high breathability ventilated felt. The ventilated felt is prepared from 50-80% of modified nylon 66 short fiber and 20-50% of polyester short fiber in a mixed needling mode. The invention further discloses a preparing method of the ultra-temperature and high-pressure resistant high breathability ventilated felt. The ultra-temperature and high-pressure resistant high breathability ventilated felt is good in using performance, even in surface density, free of float fur, good in normal temperature breathability performance and obvious in air guide capability during autoclave solidification, does not shed fur, and can ensure high-temperature high-pressure compacting molding of prepreg layer casting dies, the highest using temperature can reach 230 DEG C, and the bearing pressure can reach 1.0 Mpa. The preparing method of the ultra-temperature and high-pressure resistant high breathability ventilated felt is simple in technology, low in cost and little in equipment investment, most raw materials can be bought in the market, and production can be performed with common needling equipment.

Description

technical field [0001] The invention relates to the technical field of autoclave forming composite materials, in particular to an ultra-high-temperature, high-pressure, and high-permeability air felt 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 sealed 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. [0003] Air felt is used as a channel to realize the discharge of small molecule gas during curing, and its gas conduction ability under high temperature and high pressure conditions will seriously affect the performance improvement of composite parts. With the development of the domestic aerospace industry, the application of advanced composite materials has obtained good development opportunities, and the demand for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/4334D04H1/435D04H1/4382D04H1/46
CPCD04H1/4334D04H1/435D04H1/4382D04H1/46
Inventor 胡仲杰岑婵芳傅武兴胡潇邓鹏鹏
Owner SHANGHAI LEADGO TECH
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