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Method for fabricating non-woven fabric from flax and composite material

A non-woven fabric and a manufacturing method technology are applied in the manufacturing field of fiber non-woven fabric supports and composite materials thereof to achieve the effects of cost saving, easy operation and simple operation method

Inactive Publication Date: 2005-01-12
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at actual needs and deficiencies in the prior art, the technical problem to be solved by the present invention is to design a flax nonwoven fabric and a composite material manufacturing method using the nonwoven fabric as a reinforced support, which has the advantages of short technological process and simple operation. , easy industrialization, low cost, no pollution, etc.

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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  • Method for fabricating non-woven fabric from flax and composite material
  • Method for fabricating non-woven fabric from flax and composite material
  • Method for fabricating non-woven fabric from flax and composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The manufacturing method of flax nonwovens includes stewing, opening, carding, net laying and needle punching; the average length of flax fibers used is 16.6cm, and the average fineness is 19.6μm; the stewing process is 5% by weight of flax fibers The commercially available He Maoshui was stewed for 24 hours; the acupuncture process was as follows: first low-frequency pre-punching to reinforce the flax fiber web, pre-punching once at a frequency of 600r / min; The needle punching frequency is 800r / min, the net is cross-laid, and the needle punches twice. The flax nonwoven fabric produced has a thickness of 5.56mm and a fixed weight of 672.92g / m 2 .

[0025] Utilize the gained needle-punched flax nonwovens, adopt described vacuum infusion method to manufacture flax nonwovens reinforced composite material, process parameter is: the weight formula component of configuration resin is: unsaturated polyester resin 196s: initiator: accelerator =100: 1.2: 1.5; Initiator is coppe...

Embodiment 2

[0028] The average length of the flax fibers used in the manufacture of nonwovens is 6.6cm, and the average fineness is 12μm; when stewing, evenly add 2% of the weight of the flax fibers and hair water, and when needle-punching flax nonwovens, change the way of laying the net, that is, use Parallel laying method, needling once, needling frequency 650r / min, the thickness of flax nonwovens produced is 6.39mm, and the fixed weight is 857.39g / m 2 . Others are the same as embodiment 1.

[0029] The weight formula component of making composite material described resin is: unsaturated polyester resin 196s: initiator: promotor=100: 0.8: 1.2; Suction injection vacuum pressure is-0.085Mpa, and suction injection time is 30 minutes, gel The time was 20 minutes, and the remainder was the same as in Example 1. The resulting composite sheet measures 50 x 50 cm 2 .

[0030] The tensile and bending strength tests were carried out on the obtained composite material, and the tensile strength...

Embodiment 3

[0032] The average length of the flax fibers used in the manufacture of nonwovens is 2.8cm, and the average fineness is 40μm; 3% of the weight of the flax fibers is evenly added with wool water when stewing. Puncture 1 time, acupuncture frequency is 650r / min; main pricking frequency is 850r / min, acupuncture 3 times, other processes are the same as in Example 1. The flax nonwoven fabric produced has a thickness of 5.56mm and a fixed weight of 672.92g / m 2 .

[0033] The weight formula component of making composite material described resin is: unsaturated polyester resin 196s: initiator: promotor=100: 1.0: 1.2; Suction and injection vacuum pressure is-0.085Mpa, and suction injection time is 2 ~ 5 minutes, coagulating Glue time is 30 minutes, remaining is the same as embodiment 1. The resulting composite sheet measures 50 x 50 cm 2 .

[0034] The tensile and bending strength tests were carried out on the obtained composite material, and the tensile strength was 58.59MPa; the b...

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Abstract

This invention relates to a production method for flax etc un-woven fabrics and its composite materials including stewing flax, releasing, carding, spreading nets and needling characterizing that the selected flax fiber is 2.8-18.5cm long, mean fineness is 12-40mum, 2-5% weight of the flax fiber and water are uniformly added to be stewed for 24hours, the needling frequency is 600-650r / min, thickness of the no-woven fabric is 2-7mm, weight is 380-860g / sqm, characterizing that needled fabric is taken as the intensifying body of the compound material matched with resin to be prepared by vacuum absorption method, the weight ratio of the resin is: unsaturated polyester resin: initiator: improver=100:0.8-1.2:1.2-1.5, the initiator is Copper I IIperoxide, the improver is Co naphthenate, vacuum pressure of the vacuum absorption method: -0.085-0.095MPa for 10-30min gelling time: 15-30min.

Description

technical field [0001] The invention relates to a fibrous nonwoven support and a method for manufacturing its composite material, specifically a flax nonwoven and a method for manufacturing a resin-based composite material using the flax nonwoven as a reinforcing material. The classification number is proposed to be Int.cl 7 D04H 1 / 00. Background technique [0002] Industrial fabrics (including woven fabrics, nonwovens, etc.) are often used as reinforcement materials (also known as skeletons, reinforcements or supports) for resin-based composites. Natural plant fibers such as hemp, bamboo, straw, and coconut shell fibers are included in the scope of environmental materials because they are derived from nature, harmless to the environment, and biodegradable. At the same time, natural fiber materials such as hemp and bamboo have a multi-phase system, which also belongs to the scope of composite materials according to the broad definition of composite materials. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/425D04H1/46
Inventor 王瑞郭兴峰焦晓宁刘丽妍任元林
Owner TIANJIN POLYTECHNIC UNIV
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