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Preparation method of fragment convergence type bulletproof composite material

A technology of bulletproof composite materials and fragments, which is applied in the direction of protective equipment, chemical instruments and methods, protective clothing, etc., can solve the problems of poor flame retardancy, poor mechanical properties, high-speed fragment protection performance and limited astringent effect, and achieve radiation shielding The effect of excellent performance, excellent vibration and noise reduction ability, and excellent radiation protection performance

Active Publication Date: 2020-09-25
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The fiber woven cloth structure used in the current composite materials is mainly a two-dimensional or unidirectional fiber structure, and the resin used is mainly a thermosetting resin or a series of other modified resins, such as glass fiber cloth-epoxy resin, aromatic Fiber-phenolic resin, etc., the main molding method is generally resin and fiber preliminary impregnation to form a prepreg material, and then through conventional composite material molding or lamination molding, high pressure and heating using large pressure equipment. Preparation, the materials produced by this molding process are basically laminated structures. This structure is prone to delamination or cracking in complex environments due to high-pressure pressing and bonding between layers, with poor mechanical properties and surface density. Higher, poor radiation shielding performance, poor flame retardant performance and other shortcomings, in the harsh battlefield environment, the protection performance and convergence effect on various high-speed fragments are limited, seriously affecting combat effectiveness

Method used

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  • Preparation method of fragment convergence type bulletproof composite material
  • Preparation method of fragment convergence type bulletproof composite material
  • Preparation method of fragment convergence type bulletproof composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for preparing a fragment-convergent bulletproof composite material is carried out as follows:

[0035] S1. Preparation of aramid fiber braided structure

[0036] (1) Pretreatment of aramid fibers: put the aramid fibers in a sodium hydroxide solution with a mass fraction of 0.5%, take them out after soaking for 70 minutes, wash them with deionized water until neutral, then put them in acetone, and soak for 12 hours Finally, take it out, wash it three times with deionized water, then put it in deionized water and cook for 15 minutes, take it out and put it in an oven to dry, set the temperature at 110°C for 20 minutes, take it out and put it in a sealed bag for later use;

[0037] (2) Shallow cross-linked 2.5D weaving structure: the pretreated para-aramid fiber is divided into warp yarns and weft yarns perpendicular to each other for weaving. The warp yarns are in a curved state, the weft yarns are in a straight state, and the warp yarns are along the vertical pl...

Embodiment 2

[0048] A method for preparing a fragment-convergent bulletproof composite material is carried out as follows:

[0049] S1. Preparation of aramid fiber braided structure

[0050] (1) Pretreatment of aramid fiber: put the aramid fiber in a sodium hydroxide solution with a mass fraction of 0.5%, take it out after soaking for 1 hour, wash it with deionized water until it is neutral, put it in acetone, and soak it for 12 hours Then take it out, wash it with deionized water, put it into deionized water and cook for 15 minutes, take it out and put it in an oven to dry, set the temperature at 110°C for 20 minutes, take it out and put it in a sealed bag for later use.

[0051] (2) Shallow cross-linked 2.5D weaving structure: the pretreated para-aramid fiber is divided into warp yarns and weft yarns perpendicular to each other for weaving. The warp yarns are in a curved state, the weft yarns are in a straight state, and the warp yarns are along the vertical plane and thickness of the fa...

Embodiment 3

[0059] A method for preparing a fragment-convergent bulletproof composite material is carried out as follows:

[0060] S1. Preparation of aramid fiber braided structure

[0061] (1) Pretreatment of aramid fibers: put aramid fibers in a sodium hydroxide solution with a mass fraction of 0.5%, take them out after soaking for 1.5 hours, wash them with deionized water until neutral, then put them in acetone, soak After 12 hours, take it out, wash it with deionized water, then boil it in deionized water for 15 minutes, take it out and put it in an oven to dry, set the temperature at 110°C for 20 minutes, take it out and put it in a sealed bag for later use.

[0062] (2) Shallow cross-linked 2.5D weaving structure: the pretreated para-aramid fiber is divided into warp yarns and weft yarns perpendicular to each other for weaving. The warp yarns are in a curved state, the weft yarns are in a straight state, and the warp yarns are along the vertical plane and thickness of the fabric. C...

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Abstract

The invention provides a preparation method of a fragment convergence type bulletproof composite material. The composite material sequentially comprises a fragment constraint layer, a blended modifiedelastomer layer and a modified damping rubber layer; and the fragment constraint layer is obtained by pre-treating aramid fibers, weaving a shallow cross-linked 2.5D braided structure by woven weaving, and finally curing and forming. The fragment convergence type bulletproof composite material prepared by the invention has the advantages of being high in anti-fragment performance, low in scattering angle, flame retardant, damping, capable of reducing vibration and noise, excellent in radiation shielding performance, etc.; and the structural loss factor in a resonance state is 0.033 to 0.062,the noise reduction amount is above 10dB(A), the oxygen index can reach 40%, the neutron radiation shielding factor is 1.63 to 1.87, and the fragment scattering angle can be as low as 5.6 to 12.9 degrees.

Description

technical field [0001] The invention relates to the technical field of bulletproof materials, in particular to a method for preparing a fragment-convergent bulletproof composite material. Background technique [0002] At present, in the field of bulletproof composite materials at home and abroad, fiber-reinforced composite materials such as glass fiber, aramid fiber, and ultra-high molecular weight polyethylene fiber are mainly used. In the field of armor protection, tank armored vehicles face the threat of advanced ammunition such as armor-piercing projectiles, armor-piercing projectiles, large-caliber grenades, and anti-tank missiles. After the ammunition penetrates the steel armor of the main body of the vehicle, the steel armor and warhead are shattered to form high-speed fragments and avalanche fragments, which move forward in a cone shape at high speed, causing large-scale casualties and equipment damage inside the vehicle. The main function of the fragment-converging...

Claims

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Application Information

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IPC IPC(8): B29C70/22B29C70/42B29B15/14B29B13/00B29B13/08C08L75/04C08L63/00B32B27/34B32B27/04B32B27/40B32B27/08B32B27/12B32B25/08B32B27/18B32B7/12B32B33/00
CPCB29C70/224B29C70/42B29B15/14B29B13/00B29B13/08C08L75/04B32B5/02B32B7/12B32B27/40B32B27/12B32B27/08B32B27/18B32B25/08B32B33/00B32B2262/0269B32B2260/021B32B2260/046B32B2250/24B32B2571/02B32B2307/212C08L63/00
Inventor 李忠盛吴护林黄安畏牛犇李晓晖孙彩云程时雨尹仕攀
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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