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A kind of composite bulletproof material and preparation method thereof

A composite material and fabric technology, applied in the field of composite bulletproof materials and their preparation, can solve problems such as the decline of protective performance, and achieve the effects of high sliding performance, maintaining flexibility, and strong resistance to bullet shearing energy.

Active Publication Date: 2020-04-21
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Using shear thickening fluid (shear thickening fluid referred to as STF) to impregnate high-performance fabrics can prepare flexible liquid bulletproof materials with thinner thickness and better protection performance. Very good protection performance, however, when the impact velocity of the bullet reaches above 300m / s, the protection performance will decrease significantly

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 kind of composite bulletproof material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The aluminum sheet / Kevlar fabric / STF impregnated Kevlar fabric composite bulletproof material of the present invention, the surface layer is made of aluminum sheet, the thickness is 1.5mm, and the nail plate structure is used for laying, the middle layer fabric is 4 layers of Kevlar fabric, and the fiber linear density of the fabric is 93TEX. The density is 10.5×10.5 strands / cm, and the weight of the fabric is 201g / m 2 , the bottom layer is 2 layers of STF impregnated Kevlar fabric. STF (shear thickening fluid) is prepared by dispersing nano silicon dioxide in polyethylene glycol, the mass fraction of silicon dioxide is 30%, the viscosity after thickening reaches 1000 Pa.s, and the increase of STF is 50%.

[0031] The preparation method of aluminum sheet / Kevlar fabric / STF impregnated Kevlar fabric composite bulletproof material of the present invention:

[0032] Preparation of STF: Add nano-silica to polyethylene glycol gradually by means of mechanical dispersion, and ...

Embodiment 2

[0040] The 2 layers of Kevlar fabrics impregnated with STF as the bottom layer in Example 1 are replaced with 2 layers of pure Kevlar fabrics, and the surface layer is not covered with aluminum sheets, that is, only 6 layers of pure Kevlar fabrics are used to make Kevlar fabric composite bulletproof materials, and put into Infiltrate into a fabric bag for airtight packaging.

Embodiment 3

[0042] The 4 layers of pure Kevlar fabrics used as the middle layer in Example 1 are replaced by 4 layers of STF-impregnated Kevlar fabrics, and the surface layer is not covered with aluminum sheets, that is, only 6 layers of STF-impregnated Kevlar fabrics are used, and the STF-impregnated Kevlar fabric composite bulletproof material , into impermeable fabric bags for airtight packaging.

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Abstract

The invention discloses a composite bulletproof material and a preparation method thereof. The composite bulletproof material comprises a face layer, a middle layer and a base layer, wherein the facelayer adopts light metal armor pieces or ceramic composite armor pieces, the middle layer is a flexible high-performance fiber fabric layer, fabric comprises aramid fiber or ultra-high-molecular-weight polyethylene fiber fabric, and the base layer is high-performance fiber fabric impregnated with a shear thickening fluid. The soft and hard composite bulletproof material has good impact resistanceand high bullet shear energy, the flexible high-performance fiber fabric layer as the middle layer has the characteristics of high strength and high flexibility and has high tensile strength and slipperformance in a high-speed bullet condition, the base layer is the high-performance fiber fabric composite impregnated with the shear thickening fluid, friction performance of yarn is improved, and more energy is absorbed. Absorbed energy of the composite bulletproof material at the bullet speed of 500 m / s is 94.85 J.

Description

technical field [0001] The invention belongs to the technical field of bulletproof materials, and in particular relates to a composite bulletproof material and a preparation method thereof. Background technique [0002] Shear thickening fluid (Shear Thickening Fluid) is a new type of protective material that emerged in the United States and Britain in the early 21st century and was further developed in China. Many special particles are freely suspended in the "shear thickening fluid". The nano-spherical Particles are one of the hardest non-metallic materials in nature. They are usually flexible and strong when they are impacted. At present, as a new type of material, it is widely used in human protective equipment. [0003] Using shear thickening fluid (shear thickening fluid referred to as STF) to impregnate high-performance fabrics can prepare flexible liquid bulletproof materials with thinner thickness and better protection performance. Very good protection performance,...

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): B32B27/02B32B27/04B32B27/12B32B27/34B32B27/30
CPCB32B5/02B32B5/26B32B2260/021B32B2260/046B32B2262/0269
Inventor 陆振乾袁子顺宋孝浜
Owner YANCHENG INST OF TECH
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