Bulletproof helmet body and preparation method thereof

A bulletproof helmet and helmet body technology, which is applied in the direction of protective equipment, protective equipment, chemical instruments and methods, etc., can solve the problem of the number of layers and uniform thickness of difficult-to-lap joints, unstable bulletproof performance of the helmet, and uneven surface density of the helmet body and other problems, to avoid tensile fracture damage, ensure bulletproof performance, and maintain the effect of mechanical properties

Active Publication Date: 2021-03-02
THE QUARTERMASTER RES INST OF THE GENERAL LOGISTICS DEPT OF THE CPLA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The armor body of the bulletproof helmet obtained by this method, on the one hand, it is difficult to realize the number of overlapping layers and the thickness of the lap joints are completely uniform when the layers of the wind impeller-shaped sheets are overlapped, so that wrinkles appear in the helmet body during the molding process, and the surface density of the helmet body Inhomogeneity, resulting in unstable helmet ballistic performance; on the other hand, the helmet body is a large curvature surface shape, during the overall molding process, when the mold is closed, some warp and / or weft fibers in the sheet fabric in the helmet's local area are due to Displacement, tensile deformation or even breakage under molded force will result in the loss of fabric strength and further decrease the ballistic performance

Method used

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  • Bulletproof helmet body and preparation method thereof
  • Bulletproof helmet body and preparation method thereof
  • Bulletproof helmet body and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as Figure 1-2 Shown is a schematic structural view of the body of the bulletproof helmet provided by the present invention, including an outer layer 11 , a middle layer 12 and an inner layer 13 . Wherein, the outer layer 11 and the inner layer 13 are respectively composed of two layers of carbon fiber plain weave fabric prepregs covered with phenolic resin film; Figure 5 As shown, the middle layer 12 is formed by bonding and splicing three split bodies (the upper split body 31, the left split body 32, and the right split body 33). image 3 As shown, the overlapping width of each split beveled surface 34 is 7 mm; the angle of the beveled face 34 is 30°, and each split is composed of 48 layers of ultra-high molecular weight polyethylene non-weft prepreg impregnated with polyurethane; the outer layer 11 1. The single-layer density of the fabric prepreg used in the inner layer 13 is 150g / m 2 , the film content is 15wt% of the surface density of the single-layer fab...

Embodiment 2

[0046] The body of the bulletproof helmet in this embodiment comprises an outer layer 11, a middle layer 12 and an inner layer 13. Among them, the outer layer 11 and the inner layer 13 are respectively composed of two layers of carbon fiber plain fabric prepreg coated with epoxy resin film, and the middle layer 12 is composed of four splits (front split 41, rear split 42, left split Split body 43, right split body 44) are bonded and assembled, such as Figure 4 As shown, the junction of each split body is a step-type overlapping surface 45, and the overlapping width of each split-type step-type overlapping surface 45 is 4mm; each split body is composed of 48 layers of impregnated styrene-isoprene-styrene block Copolymer ultra-high molecular weight polyethylene non-weft prepreg composite composition; the fabric prepreg used in the outer layer 11 and inner layer 13 has a single layer density of 150g / m 2 , the film content is 15wt% of the surface density of the single-layer fabri...

Embodiment 3

[0054] The body of the bulletproof helmet in this embodiment comprises an outer layer 11, a middle layer 12 and an inner layer 13. Wherein, the outer layer 11 and the inner layer 13 are respectively composed of two layers of glass fiber plain weave fabric prepregs coated with epoxy resin film; Rear split body 53, left split body 54, right split body 55) are bonded and assembled, as Figure 7 As shown, the joints of each split body are overlapping oblique cut surfaces 56, and the overlapping width of each split oblique cut surface 56 is 7mm; Aramid plain weave fabric prepreg composite composition; the fabric prepreg used in the outer layer 11 and the inner layer 13 has a single layer density of 200g / m 2 , the adhesive film content is 15wt% of the surface density of the single-layer fabric prepreg; the single-layer density of the fabric prepreg used in the middle layer is 380g / m 2 , the content of the phenolic resin film is 13wt% of the areal density of the single-layer fabric...

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Abstract

The invention discloses a bulletproof helmet body and a preparation method thereof. The bulletproof helmet body is obtained by compression molding of an outer layer, a middle layer and an inner layer.Both the outer layer and the inner layer are formed by compounding 1-5 layers of fabric prepregs, the middle layer is formed by splicing 2-7 split bodies, each split body is formed by compounding 15-75 layers of fabric prepregs, and the joints of the split bodies are diagonal planes or stepped lap joint surfaces which can be lapped. According to the bulletproof helmet body, due to the fact that the middle layer is formed by splicing the multiple split bodies after independent heating and die pressing, the split bodies are small in area and curvature, sheets used for die pressing forming do not need to be cut into a wind impeller shape, the problems that the helmet body wrinkles and the surface density is uneven due to uneven lap joint of the sheets are solved, and stability of bulletproofperformance of the helmet body is guaranteed. On the other hand, due to the fact that the split bodies of the middle layer are small in area and curvature, the problem that fibers in the fabric are damaged due to tensile fracture in the mold pressing process in the mold closing and pressurizing process is solved, the mechanical property of the fabric is kept, and the bulletproof performance of the bulletproof helmet is improved.

Description

technical field [0001] The invention relates to a bulletproof helmet body and a preparation method thereof, belonging to the technical field of helmet preparation. Background technique [0002] The helmet is an important personal protective equipment used to protect the head from injury. On the battlefield, a projectile penetrating the helmet will cause fatal damage to the human body. Bulletproof helmets can effectively reduce casualties on the battlefield. With the development of science and technology and the advent of new materials, modern bulletproof helmets have experienced the development process from steel helmets to fiber-reinforced composite materials. In recent years, the development of the helmet body has focused on lightweight and high protection levels. Currently, the high-performance fibers used in bulletproof helmets mainly include aramid fibers, ultra-high molecular weight polyethylene fibers, and polyparaphenylene benzobisoxazole fibers. (PBO) and glass f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B27/02B32B27/04B32B27/12B32B27/30B32B27/32B32B27/34B32B27/38B32B27/40B32B27/42B32B17/04B32B17/10B32B1/00B32B3/22B32B37/06B32B37/10F41H1/04
CPCB32B5/024B32B5/022B32B5/26B32B27/12B32B27/38B32B27/42B32B1/00B32B3/18B32B37/06B32B37/10F41H1/04B32B2250/40B32B2260/021B32B2260/046B32B2262/0253B32B2262/101B32B2262/0269B32B2262/106B32B2309/02B32B2309/04B32B2309/12B32B2571/02
Inventor 马天李伟萍来悦黄献聪龙知洲马琪皓
Owner THE QUARTERMASTER RES INST OF THE GENERAL LOGISTICS DEPT OF THE CPLA
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