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A density-adjustable and controllable acupuncture preform and its preparation method

A prefabricated body and acupuncture technology, which is applied in the direction of textiles, papermaking, non-woven fabrics, etc., can solve problems such as difficulty in adapting to the volume density gradient of acupuncture prefabricated bodies, limited application fields, and limited influence of volume density. Process stability and preparation efficiency, avoiding the need for continuous adjustment of process parameters, and simple preparation

Active Publication Date: 2020-05-29
NANJING FIBERGLASS RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems are as follows: 1. Prepare units with different densities and a certain thickness first, and then connect the independent units into a whole through needle punching. Although it can be prepared into a whole variable-density needle-punched fabric, the connection strength between the units is weak and easy to separate. layer, which affects performance and will lead to limited use areas
2. Through the adjustment of the acupuncture process parameters, mainly the adjustment of the acupuncture density, the repeated hooking of the needles has limited influence on the volume density, and it is difficult to adapt to the current requirement of a large gradient in the volume density of the acupuncture preform.

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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  • A density-adjustable and controllable acupuncture preform and its preparation method
  • A density-adjustable and controllable acupuncture preform and its preparation method
  • A density-adjustable and controllable acupuncture preform and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0036] see figure 1 , 1# density-adjustable and controllable needle-punched preform 100, the needle-punched preform 100 is a carbon fiber flat fabric with variable density.

[0037]The 1# density-adjustable and controllable acupuncture preform 100 is provided with three layers of different density regions from top to bottom along the thickness direction. area 12 and bottom low density area 13. Wherein, the density of the top high-density region 11 is 0.64±0.01g / cm 3 , the density of the intermediate transition region 12 is 0.40±0.01g / cm 3 , the density of the bottom low-density region 13 is 0.16±0.01g / cm 3 , the plane size is 500mm×500mm, the thickness H11 of the top high-density region 11, the thickness H12 of the middle transition region 12 and the thickness H13 of the bottom low-density region 13 are all 10mm.

[0038] The 1# density-adjustable and controllable acupuncture preform is prepared from the 1# equal-density preform 110 .

[0039] see figure 2 , correspondi...

Embodiment 2

[0063] see image 3 and Figure 4 , 2# density adjustable and controllable acupuncture preform 200, the acupuncture preform 200 is variable density quartz tubular fabric, the density of the tubular fabric is divided into three density areas along the thickness direction, from the inside to the outside of the The three density areas are the inner low-density area 23, the middle transition area 22 and the outer high-density area 21. The density of the three densities increases successively from the inside to the outside, and the density of the inner low-density area 23 is 0.10±0.01g / cm 3 , the density of the middle transition zone 22 is 0.30±0.01g / cm 3 , the density of the outer high-density region 21 is 0.50±0.01g / cm 3 , the fabric length is 800mm, the inner diameter D1 is 600mm, and the outer diameter D2 is 660mm. The thickness H23 of the inner low-density region 23 , the thickness H22 of the middle transition region 22 and the thickness H21 of the outer high-density region...

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Abstract

The invention discloses a needling prefabricated body adjustable and controllable in density. The prefabricated body is prepared from at least two layers, wherein at least one unit layer containing water-soluble fibers is subjected to laminated needling forming, and then the water-soluble fibers in the unit layer are dissolved to prepare the prefabricated body. The invention also discloses a preparation method of the needling prefabricated body. The method comprises the following steps of mixing the water-soluble fibers different in proportion into fiber cloth or a fiber net and adopting a lamination needling process for preparing the needling prefabricated body with certain thickness, wherein the volume density of the prefabricated body can be changed in any gradient in the thickness direction. According to the preparation method, the characteristic that the water-soluble fibers are easy to dissolve and hydrolyze is utilized, the water-soluble fibers are added according to different density requirements of different portions of a fabric to prepare the fabric with equal density, and after the water-soluble fibers are dissolved, the preparation of the density-variable prefabricatedbody is achieved. According to the needling prefabricated body and the preparation method, the defect that process parameters need to be continuously adjusted in a preparation process of the same fabric can be avoided, and the process stability and the preparation efficiency can be ensured.

Description

technical field [0001] The invention relates to a method for preparing a reinforcing body for composite materials, in particular to an acupuncture prefabricated body with adjustable and controllable density and a preparation method thereof. [0002] The invention discloses a method for preparing an acupuncture preform with arbitrarily variable density. By mixing water-soluble fibers in different proportions in fiber cloth or fiber net, an acupuncture preform of a certain thickness is prepared by a laminated acupuncture process. The preform The bulk density can be varied in any gradient along the thickness direction. Background technique [0003] The needle-punched prefabricated body is made of fiber mesh tires and fiber base cloth as raw materials. The needles with a triangular cross-section (or other shapes) and barbs on the edges are used to puncture the raw materials repeatedly, so that part of the horizontal fibers in the fiber mesh are transferred to Z. Tens of thousan...

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 Patents(China)
IPC IPC(8): D04H1/46D04H1/4382D04H1/4309
CPCD04H1/4309D04H1/4382D04H1/46
Inventor 刘延友程海霞乔志炜
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD