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Light composite protection structure

A composite protective structure and protective structure technology, which is applied in the direction of protective clothing, protective equipment, synthetic resin layered products, etc., can solve the problems of reducing the protective efficiency of fiber fabrics and weakening the protective performance of fiber fabrics, so as to improve the protective effect and minimize the The effect of increasing the damage and roughness of the human body

Pending Publication Date: 2021-12-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the multi-layer fiber fabric protective structure, because there is a small gap between the fiber fabrics, when the first layer of fiber fabric is impacted, the deformation will affect the rear fiber fabric, but at this time the projectile does not contact the rear fiber fabric. The fiber fabric is deformed in advance, which weakens the protective performance of the rear fiber fabric, so stacking multiple layers of fiber fabrics will reduce the protective efficiency of the fiber fabric

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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  • Light composite protection structure
  • Light composite protection structure
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Nano-SiO with a particle size of 80nm 2 Add the powder into PEG-200 (polyethylene glycol with a molar mass of 200g / mol), and after ultrasonically dispersing evenly, add B with a particle size of 1 μm to 10 μm 4 C powder, continue to ultrasonically disperse, transfer to a vacuum drying oven to dry for 24 hours to remove air bubbles after uniform dispersion, and obtain B 4 C modified shear thickening protective fluid;

[0028] Among them, nano-SiO 2 The mass fraction of powder is 20%, B 4 The mass fraction of C powder is 10%, and the mass fraction of PEG-200 is 70%;

[0029] (2) Absolute ethanol and B 4 C modified shear thickening protection liquid is mixed according to the mass ratio of 10:7, and mixed evenly to obtain diluted B 4 C modified shear thickening protective fluid;

[0030] (3) Immerse the single-layer fiber fabric (Twaron CT709) in diluted B 4 C modified shear thickening protection solution, then take it out and place it in a constant temperature e...

Embodiment 2

[0033] Steps (1)~(3) are identical with embodiment 1 steps (1)~(3);

[0034] (4) The modified single-layer fiber fabric and the unmodified single-layer fiber fabric (Twaron CT709) are superimposed together as a composite fabric layer, and the surface density of the composite fabric layer is 444.4g / m 2 ; 8 layers of composite fabric layers with a total mass of 320g and 24 layers of PE laminates with a total mass of 480g (area density of 222.2g / m 2 ) are alternately arranged (one layer of composite fabric layer and three layers of PE laminate as a repeating cycle), wherein, the facing surface is a modified single-layer fiber fabric in the composite fabric layer, and the back surface is PE laminate, and the surface density 8.89kg / m 2 Lightweight composite protective structures, such as image 3 shown.

Embodiment 3

[0036] Steps (1)~(3) are identical with embodiment 1 steps (1)~(3);

[0037] (4) The modified single-layer fiber fabric and the unmodified single-layer fiber fabric (Twaron CT709) are superimposed together as a composite fabric layer, and the surface density of the composite fabric layer is 444.4g / m 2 ; 7 layers of composite fabric layers with a total mass of 280g and 26 layers of PE laminates with a total mass of 520g (area density of 222.2g / m 2 ) are alternately arranged (one layer of composite fabric layer and three layers of PE laminates as a repeating cycle, and the remaining five layers of PE laminates are stacked with the three layers of PE laminates in the last cycle as a backboard), among which, the The surface is a modified single-layer fiber fabric in the composite fabric layer, and the back surface is a PE laminate, and the surface density is 8.89kg / m 2 Lightweight composite protective structures, such as Figure 4 shown.

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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Abstract

The invention relates to a light composite protection structure, and belongs to the technical field of protection structures. The protection structure is of a composite layered structure formed by alternately arranging composite fabric layers and PE laminated boards, the mass ratio of the composite fabric layers to the PE laminated boards in the protective structure is 1:1.2 to 1:4, the composite fabric layers are composed of modified single-layer fiber fabrics and unmodified single-layer fibers, the bullet facing face is the modified single-layer fiber fabrics in the composite fabric layers, and the back plate surface is a PE laminated plate. According to the protection structure, the overall bulletproof capacity of the protection structure is enhanced through the disturbance effect of wave impedance, and deformation of the back plate making contact with the human body can be obviously reduced so that harm to the human body can be reduced; and by regulating and controlling the mass ratio of the composite fabric layer to the PE laminated board, the protection performance of the protection structure can reach the best level under the same surface density.

Description

technical field [0001] The invention relates to a lightweight composite protective structure, which belongs to the technical field of protective structures. Background technique [0002] Shear thickening liquid is a kind of non-Newtonian fluid. Under the condition of certain shear rate, the viscosity of shear thickening liquid system will increase rapidly with the increase of shear rate. The fiber fabric is immersed in the shear thickening liquid, its existence increases the friction between the yarns, on the one hand, it improves the individual protection ability of the fiber fabric; on the other hand, due to the increase of the friction between the yarns, the structure of the fiber fabric The integrity is improved, and the impregnated fiber fabric will increase the stress area of ​​the back structure when it is impacted, making the stress distribution more uniform and increasing the energy absorption of the projectile. However, for the multi-layer fiber fabric protective ...

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): B32B27/02B32B27/34B32B27/08B32B27/32B32B27/06
CPCB32B5/02B32B5/26B32B27/32B32B27/08B32B27/12B32B2250/42B32B2260/023B32B2260/046B32B2262/0269B32B2571/02
Inventor 黄广炎许尧杰张宏王涛马宇
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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