RU1794239C - Bullet-proof material - Google Patents

Abstract

The invention relates to personal protective equipment and can be used, in particular, in bulletproof materials for the manufacture of light armored vests from composite materials designed to protect against pistol bullets and cold steel. The purpose of the invention is to increase resistance to ballistic effects and penetration of bodies and objects. The bulletproof material consists of fabric layers with a plain weave of threads made from twisted fibers based on a rigid chain polyparabenzimidazole terephthalamide polymer with a total surface density of the layers of 3200-3800 g / m, the fiber diameter is 10-18 μm, their spacing is 4-11 mm. piercing threads are arranged in increments between the cross-stitch rows of firmware equal to 4-10 thicknesses of the material. The positive effect of using the invention is to increase the resistance to penetration by pistol bullets and piercing objects. 1 tab. ate with

Description

The invention relates to personal protective equipment and can be used, in particular, in bulletproof materials for the manufacture of light armored vests from composite materials designed to protect against pistol bullets and cold weapons.

A bulletproof material / consisting of layers of fabric based on yarn of aramid fibers bonded to each other by stitching threads from a flexible-chain polyamide is known.

The disadvantages of the known material include unreliability in providing protection at a distance of x, less than 20 m.

The purpose of the invention is to increase resistance to ballistic effects and penetration of bodies and objects.

This goal is achieved by the fact that in a bulletproof material consisting of fabric layers based on aramid fiber yarns bonded to each other with stitching threads. Of flexible chain polyamide, its woven layers are made with a web weaving of twisted fibers based on one another rigid-chain polyparabenzimide-zoloterephthalamide polymer with a total surface density of the layers of 3200-3800 g / m2. The diameter of the fibers is 10-18 microns, the pitch of their twisting is 4-11 mm, the piercing threads are spaced between the cross rows of piercing equal to 4-10 thicknesses of the material.

A distinctive feature of the bulletproof material is the implementation of its woven layers with a linen binding of 1 che

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filaments of twisted fibers of the specified rigid-chain polymer, the surface density of the layers, the diameter of the fibers, the pitch of their twisting, the ratio of the pitch of the piercing with the thickness of the material. A more detailed description of bulletproof material is as follows.

For the manufacture of fabrics, prototypes of filaments were used from twisted to each other fibers of 2-15 mm on the basis of polyparabenzimidazole terephthalamide (PABIA) polymer. Fibers were obtained by dry-wet forming from solutions of a fiber-forming polymer. At the same time, fibers of different diameters were formed by changing the diameter of the spinnerets.

In order to obtain a bulletproof material and choose the optimal structure, 5 samples (batches) of 200x200 mm in size were made (10 samples in each batch), which were layered packs of linen weave fabric sewn together with flexible polycaproamide yarns in increments of equal from 2 to 14 thicknesses of the package.

The tests were carried out as follows.

Samples were fixed on a standard substrate with a certain hardness. Bulletproof properties after firing bullets were determined by the depth of indentation in

substrate and the number of penetration of samples from the party

The table shows the bulletproof properties of the material,

These tables show that samples from batches 3-5 with structural parameters corresponding to the claims have the highest bulletproof properties.

According to foreign standards, the material

It is considered effective if the number of penetrations does not exceed 50%. in the case considered, the number of penetrations does not exceed 20% of the party 3, the maximum allowable depth of indentation in the substrate should not

exceed 44 mm, in the considered case, the material provides no more than 12 mm.

Material with a surface density higher than the limits indicated in the claims, batch 2 - has comparable properties with batches 3-5, but its surface density is 16% lower. Bulletproof material of batches 3-5. Has the most effective properties.

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Claims (3)

Formula and shade 1. Bulletproof material consisting of layers of fabric based on filaments of armide fibers, bonded together with stitching threads of flexible polyamide, and with the fact that, with In order to increase the resistance to ballistic effects and the penetration of bodies and objects, woven layers of material are made in it with a plain weave of threads from twisted fibers based on a rigid chain poly-para-benzimidazole terephthalamide polymer with a sum of the surface density of layers 3200-3800 g / m2. 2. The material according to claim 1, wherein the diameter of the fibers of the rigid-chain poly-para-benzimidazole terephthalamide polymer is 10-18 μm. the pitch of the lay is mm. 3. The material according to claim 1, with the fact that the piercing threads are arranged in increments between the cross-stitch rows of firmware equal to 4-10 thicknesses of the material.