Aramid nanofiber composite unidirectional fabric and preparation method thereof

A nanofiber, aramid fiber technology, applied in fiber processing, chemical instruments and methods, protective equipment, etc., can solve problems such as poor comfort, high production difficulty, and hard products

Pending Publication Date: 2021-03-26
SINOCHEM HIGH PERFORMANCE FIBER MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are mainly three ways to improve the ballistic performance V50 of UD fabrics at home and abroad: one is to increase the strength of aramid fiber, ultra-high strength aramid fiber (above 28g / d) is usually polymerized and spun by adding a third monomer, The production difficulty is relatively high, and the cost is 2-3 times that of ordinary strength aramid fiber (23g / d), and the economy is poor; the second is advanced UD processing technology, but the cost of high-precision equipment is also 10 times that of ordinary equipment The above; the third is to carry out the compounding of the third component, such as alumina, graphene and other inorganic materials, but the product is hard and the comfort is poor

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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  • Aramid nanofiber composite unidirectional fabric and preparation method thereof
  • Aramid nanofiber composite unidirectional fabric and preparation method thereof
  • Aramid nanofiber composite unidirectional fabric and preparation method thereof

Examples

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preparation example Construction

[0077] The preparation method of the UD cloth of aramid fiber nanofiber composite of the present invention comprises:

[0078] (1) preparing a unidirectional sheet comprising unidirectionally arranged aramid fibers and an adhesive, wherein the adhesive includes aramid nanofibers;

[0079] Optionally also include:

[0080] (2) Laminate the unidirectional sheets, and then optionally attach a protective layer to the upper and lower surfaces of the laminated unidirectional sheets; and / or

[0081] (3) The laminated unidirectional sheets are laminated by hot pressing to obtain a UD cloth including a plurality of unidirectional sheets.

[0082] In step (1), the unidirectional sheet can be prepared by methods known in the art, for example, the aqueous dispersion of the adhesive is uniformly attached to the aramid fiber and dried to obtain the unidirectional sheet. The present invention is characterized in that the adhesive comprises aramid nanofibers, that is, the aqueous dispersion...

Embodiment 1-5

[0109] Embodiment 1-5 prepares the UD cloth of aramid fiber nanofiber composite of the present invention, comprises the following steps:

[0110] (1) Spreading wire dipping

[0111] The aramid fiber on the creel is spread on the master roller of the dipped thread through the tension controller and the drafting device, and the aramid fiber is passed through the glue tank equipped with the prepared adhesive water dispersion through the drafting roller, and then The aramid fiber is evenly spread and glued by the affinity roller, and the water in the adhesive water dispersion is evaporated to dryness through a circulating heating device, and then wound up to form a unidirectional sheet, wherein the thickness of the glue film is 0.02mm;

[0112] Wherein, the aqueous adhesive dispersion includes: resin matrix, resin modifier, tackifier, emulsifier, defoamer, antioxidant, pH regulator, deionized water and aramid nanofiber, embodiment 1-5 Use adhesive aqueous dispersions with differe...

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Abstract

The invention relates to an aramid nanofiber composite unidirectional fabric and a preparation method thereof. The aramid nanofiber composite unidirectional fabric comprises unidirectional sheet layers, the unidirectional sheet layers comprise aramid fibers arranged in a unidirectional mode and an adhesive, and the adhesive comprises aramid nanofibers. According to the invention, the bonding strength of the adhesive is improved, and the interface performance of the aramid fibers and the adhesive is improved. A bulletproof product prepared by cutting, laminating, compounding and molding the aramid nanofiber composite UD fabric has the advantages that the shrapnel impact resistance is improved while the quality of the product is not greatly improved, and the safety index is higher.

Description

technical field [0001] The invention belongs to the technical field of bulletproof protection, and in particular relates to a unidirectional cloth composited with aramid fiber nanofibers and a preparation method thereof. Background technique [0002] Aramid fiber is an organic high-performance fiber with excellent comprehensive properties. It has high-strength and high-modulus mechanical properties, as well as high temperature resistance, flame retardancy and chemical corrosion resistance. It is widely used in the field of military protection. [0003] UD cloth (uni-directional fabric, also known as unidirectional fabric or unidirectional fabric) is a unidirectional non-weft fabric, usually composed of 0° and 90° unidirectionally arranged fibers orthogonally composited, coated with resin and thermocompressed. , is an ideal bearing member. Due to the requirements of the load-bearing structure, fibers with higher strength are usually selected, such as high-strength aramid fib...

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): B32B27/32B32B27/08B32B27/34B32B27/02B32B27/30B32B27/36B32B27/04B32B5/02B32B5/12B32B5/26B32B7/08B32B7/022B32B33/00B32B37/10B32B37/06D06M17/04D06M17/10F41H1/02F41H1/04F41H5/02
CPCB32B27/32B32B27/12B32B27/34B32B27/308B32B27/365B32B5/02B32B5/12B32B5/26B32B7/08B32B7/022B32B33/00B32B37/10B32B37/06D06M17/04D06M17/10F41H1/02F41H1/04F41H5/02B32B2260/021B32B2260/046B32B2307/50B32B2571/02B29C70/00B32B5/022B32B2260/023B32B2307/514
Inventor 曹煜彤张立铭宋数宾赵开荣张浩曹美荣陈超钱仲昊
Owner SINOCHEM HIGH PERFORMANCE FIBER MATERIALS CO LTD
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