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Nonwoven fabric of toughened composite material and preparation method thereof

A technology of toughening composite materials and non-woven fabrics, which is applied in the direction of non-woven fabrics, textiles, and papermaking, and can solve problems such as hindering the flow of RTM resin, low production efficiency of electrospinning process, and increased difficulty of RTM composite material forming process. Achieve the effects of improving yield and quality stability, improving compression performance, and reducing overall manufacturing costs

Active Publication Date: 2012-06-27
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In Chinese patent ZL2006100993819, the thermoplastic film placed between the layers of the reinforced fabric has achieved the purpose of toughening, and the CAI of the toughened composite material has been significantly improved, but the thermoplastic film placed between the layers will hinder the flow of RTM resin between the layers , thus increasing the difficulty for the molding process of RTM composites
However, the production efficiency of the electrospinning process is very low, which is only suitable for small-scale laboratory research and cannot meet the requirements of large-scale engineering applications

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] The preparation steps of the above-mentioned high-performance thermoplastic non-woven fabric toughening material are as follows:

[0016] 1. Preparation of thermoplastic / epoxy blends: Add 100 parts of epoxy resin into a suitable container, heat to below 80°C, add 50-300 parts of thermoplastic polymer and stir evenly, and then grind with a three-roller mill After uniformity, heat in an oven at 100-150°C to completely dissolve the thermoplastic polymer in the epoxy resin, and finally process it into granules;

[0017] 2. Preparation of thermoplastic / epoxy blended non-woven fabrics by melt blown spinning: Feed the thermoplastic / epoxy blend into the melt blown spinning machine, pass through the screw extruder, metering pump, spinning assembly and high temperature compressed air The fibers are extruded and deposited on a receiver. Extrusion temperature: 160~300℃, compressed air temperature: 140~250℃, compressed air speed: 10~30m / s;

[0018] 3. Organic solvent removal of ep...

Embodiment

[0022] 1. Heat 1200g of epoxy resin E54 to 70°C, add 800g of polysulfone, stir and grind to disperse evenly, and then heat to 140°C to make thermoplastic / epoxy blended pellets, melt-blown the blended pellets The spinning machine is spun to prepare polysulfone / epoxy blended non-woven fabrics, and then the polysulfone / epoxy blended non-woven fabrics are washed three times in acetone (30min each time), and finally dried to obtain polysulfone non-woven fabrics. cloth. Using the prepared polysulfone non-woven fabric toughened 5228A / CCF300 epoxy resin-based carbon fiber composite material, the compressive strength after impact was increased from 265MPa to 322MPa.

[0023] 2. Heat 1000g of epoxy resin E54 to 70°C, add 1200g of polyethersulfone, stir and grind to disperse evenly, then heat to 140°C to make thermoplastic / epoxy blended pellets, melt the blended pellets The polyethersulfone / epoxy blended non-woven fabric was prepared by spinning on a jet spinning machine, and then the p...

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Abstract

The invention belongs to the composite material high-performance realizing technology and high-performance nonwoven fabric technology, and relates to nonwoven fabric of toughened composite material and a preparation method thereof. The nonwoven fabric consists of thermoplastic polymer fiber prepared from thermoplastic / epoxy blended material by melt-blow spinning; the thickness of the nonwoven fabric is 5-50 microns; and the diameter of the fiber is 0.2-10 microns. In the preparation process of the composite material, the nonwoven fabric is placed between the pre-soaking or reinforcing material layers so as to toughen the composite material. Meanwhile, as the nonwoven fabric is a porous material, the nonwoven fabric does not hinder effective flow of resin in the forming process of the composite material, thereby being favorable for improving the internal quality of the composite material.

Description

technical field [0001] The invention belongs to high-performance technology of composite materials and high-performance non-woven fabric technology, and relates to a non-woven fabric of toughened composite materials and a preparation method thereof. Background technique [0002] The high performance of advanced composite materials, especially high toughness is an important direction of advanced composite materials research. Through high toughness, it can effectively improve the impact damage resistance and design allowable strain of composite materials, and improve the weight loss efficiency of composite materials. There are mainly the following methods for the toughening of composite materials, one is rubber toughening, the other is thermoplastic polymer blending for toughening, and the third is adding rigid particles for toughening. On the basis of thermoplastic blending toughening, in the early 1990s, the toughening method of interlayer toughening was proposed, which mai...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/009D04H3/147
Inventor 包建文张天骄钟翔屿李晔陈祥宝
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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