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Preparation method of bulletproof helmet

A technology of bulletproof helmets and helmets, which is applied to other household appliances, household appliances, household components, etc., can solve the problems of poor mechanical properties, large bullet-back surface, and low melting point, so as to achieve light weight, reduce secondary injuries, and improve maneuverability. Effects on capacity and survivability

Inactive Publication Date: 2019-05-24
LIANYUNGANG YINGYOU HEDA MOLD MFG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyethylene fiber itself also has unavoidable shortcomings. Its melting point is low and its mechanical properties are poor in high temperature environments. When it is applied to bulletproof materials, it will cause a large bulge on the back surface. Therefore, pure ultra-high molecular weight polyethylene fiber composite materials There are still areas that need to be improved in terms of bulletproof performance

Method used

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  • Preparation method of bulletproof helmet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of a bulletproof helmet, comprising the following steps:

[0030] (1) Lay up the base material UHMWPE fiber and carbon fiber separately, wherein the UHMWPE fiber ply is overlapped with 53 layers at 90 degrees and 0 degrees; the carbon fiber layer is 90 degrees and 0 degrees. 9 layers are laid on top of each other; the basic material distribution method is: the impact surface is ultra-high molecular weight polyethylene fiber, and the back convex blocking surface is carbon fiber;

[0031] (2) After the layup is completed, apply high-toughness epoxy resin on the joint position of the ultra-high molecular weight polyethylene fiber and the carbon fiber layup, place the laminated material on the helmet mold, and wrap it in a high-temperature-resistant vacuum bag. The good tablet is evacuated, and the vacuum pressure is kept at 0.8-1.5MPA, and it is placed in a curing oven at a temperature of 120-130°C for 90 minutes.

Embodiment 2

[0033] A preparation method of a bulletproof helmet, comprising the following steps:

[0034] (1) Lay up the base material UHMWPE fiber and carbon fiber respectively, wherein the UHMWPE fiber plies are laid 56 layers at 90 degrees and 0 degrees; the carbon fiber layers are staggered at 45 degrees. Lay 7 layers; the distribution mode of the basic material is: the impact surface is ultra-high molecular weight polyethylene fiber, and the back convex blocking surface is carbon fiber;

[0035](2) After the layering is completed, apply high-toughness epoxy resin at the joint position of the ultra-high molecular weight polyethylene fiber and the carbon fiber layer, place the layered material on the helmet mold, and use a 300-ton flat vulcanizing machine to press molding , keep the pressure at 15 ~ 17Kg, the temperature at 120 ~ 130 ℃, keep it for 90 minutes, demould and form.

Embodiment 3

[0037] A preparation method of a bulletproof helmet, comprising the following steps:

[0038] (1) The ultra-high molecular weight polyethylene fiber layer is laid 50 layers overlapping each other at 90 degrees and 0 degrees; after the layering is completed, it is separately formed on the mold, the temperature is 120 ~ 130 ° C, the pressure is 15 ~ 17Kg, and the molding time is 90 minutes to form an ultra-high molecular weight polyethylene fiber helmet;

[0039] (2) 12 layers of carbon fiber layers overlapped at 90 degrees and 0 degrees. After the layers are completed, they are individually formed on the mold, the temperature is 120-130°C, the pressure is 12-15Kg, and the molding time is 90 minutes to form a carbon fiber helmet. ;

[0040] (3) The outer surface of the carbon fiber helmet in step (2) is evenly coated with a thermosetting polyurethane adhesive layer with a thickness of 0.3 mm, and the ultra-high molecular weight polyethylene fiber helmet and the carbon fiber hel...

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Abstract

The invention provides a preparation method of a bulletproof helmet. The method comprises the following steps that ultra-high molecular weight polyethylene fiber and carbon fiber are taken as base materials, high-performance tough resin is taken as a binding agent of the two base materials, then high-temperature vacuum adsorption, hot-pressing integral molding or the method through gluing after separate forming of the ultra-high molecular weight polyethylene fiber or the carbon fiber are adopted for forming a whole, wherein the base materials are distributed in a mode that the bullet hitting surface is the ultra-high molecular weight polyethylene fiber, the back convex blocking surface is made of the carbon fiber, the ultra-high molecular weight polyethylene fiber is 50-56 layers in totaland the carbon fiber is 7-12 layers. The bulletproof helmet prepared by the preparation method is high in anti-penetration performance, capable of effectively reducing secondary damage to the head caused by the back projection amount, light in weight, and high in bulletproof level.

Description

technical field [0001] The invention relates to the field of bulletproof helmets, in particular to a preparation method of a bulletproof helmet. Background technique [0002] Helmet is a kind of personal protective equipment used to protect the head from injury. According to relevant data analysis, most casualties on the battlefield are caused by shrapnel, and bulletproof helmets can effectively reduce casualties on the battlefield. Research by relevant British departments shows that wearing bulletproof helmets can reduce the injury rate by 5% and the death rate by 19%. Statistics from the U.S. military in World War II also show that steel helmets protected the lives of at least 70,000 American soldiers. Modern military helmets have gone through the development process from steel helmets to fiber-reinforced composite materials. Among the types of fiber-reinforced composite non-metallic helmets, there are mainly glass fiber helmets and nylon. [0003] The materials used in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29L31/48
Inventor 龙浩周恒香徐亚飞尚武林张建国封亚欧
Owner LIANYUNGANG YINGYOU HEDA MOLD MFG
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