RU219798U1 - FLEXIBLE COMBINED ARMOR PACKAGE - Google Patents

Abstract

The utility model relates to means of personal armor protection against the effects of bullets and shrapnel, in particular, to flexible protective packages, which are the main part of the bulletproof vest. The proposed flexible combined armor package consists of 3 parts: front, middle and rear. The armor package contains alternating at least 2 layers of aramid fabric with hydrophobic treatment of the front part, then at least 2 layers of UHMWPE in the middle part and at least 2 layers of aramid fabric with hydrophobic treatment of the back part, assembled in one package. The use of sealed covers for UHMWPE is not required, since a separate package is not formed from these layers. The number of layers of aramid fabric and UHMWPE depends on the impactor against which the protective structure is made, and is selected experimentally.

The technical result of a flexible combined armor package is:

- ensuring ballistic resistance when operating in a wet state (when the product gets wet);

- reducing the cost of the entire armor package by replacing layers of expensive aramid fabric with layers of cheap UHMWPE;

- compared to armor packages made of heavy aramid fabrics made of Kevlar and Twaron threads, you can get a weight gain of up to 15%;

- the absence of the need to use sealed covers for UHMWPE allows you to save the standard technology of tailoring and edging of the armored package without the use of special equipment. 1 ill.

Description

The utility model relates to means of personal armor protection against the effects of bullets and shrapnel, in particular, to flexible protective packages, which are the main part of the bulletproof vest.

From the field of technology, multilayer protective bags for body armor are known (see RU 2013 146912 A 10/21/2013; RU 130061 U1 10/02/2012), consisting of several layers of aramid ballistic fabric glued together with a polyethylene film and impregnated with a polymer binder, or made of high modulus polyethylene .

The disadvantage of the design is the reduction of the protective properties of the package when wet. To eliminate this drawback, special waterproof covers are used, in which armored packages are placed.

Known ballistic soft protective package (RU 2382317 C1 09/12/2008), in which fabrics of different weaving are used as three parts of the armor package. The issue of reduced wet resistance is not considered. The disadvantage of the design is the high cost of the fabrics used.

A multilayer armored panel is also known (RU 189416 U1 08/17/2017), where an aramid fabric package is used as the middle layer, and the back layer is made of a pre-pressed panel of sheet material of unidirectionally laid threads of ultra-high molecular weight polyethylene (UHMWPE).

The disadvantage of this design is its rigidity. The pressed UHMWPE panel does not lose its properties when wet, but cannot be a flexible body armor base.

The closest analogue is the armor panel developed by Giordano Ballistic LLC, which is used, for example, in the Remo Lux AK47 Br 2 bulletproof vest and is a structure of armor panels made of aramid fabric (Kevlar) and thin panels made of pressed ultra-high molecular weight polyethylene (UHMWPE). The use of UHMWPE sheet instead of aramid fabric makes it possible to lighten and reduce the cost of the panel for soft armor protection. However, soft UHMWPE protection requires sealed covers made of special fabrics.

The disadvantage of the known design is the decrease in the protective properties of the UHMWPE armored panel when wet and the impossibility to eliminate this disadvantage of using hydrophobic compositions for impregnating it.

The objective of the utility model is to ensure the ballistic resistance of the armored package when operating in a wet state (when the product is wet) while reducing the cost and weight of the entire combined package using aramid fabrics, as well as maintaining the standard technology for sewing and edging the armored package without the use of special equipment.

This is achieved by the fact that in the well-known armor package containing the front part formed from several layers of aramid fabric with hydrophobic treatment, and the back part formed from layers of UHMWPE, the back part of the armor package is formed from several layers of aramid fabric with hydrophobic treatment, and the layers of UHMWPE are placed between the front and back parts as the middle part of the armor package in such a way that all layers of the armor package are assembled and edged into a single package.

The number of layers of the front, middle and rear parts of the armor package - at least 2 in each part, is selected experimentally and depends on the striker against which the protective structure is made.

The specified set of essential features of the claimed utility model, namely, the combination of layers of aramid fabric with hydrophobic treatment and non-hydrophobic UHMWPE, located in the middle of the armor package, is not known from the prior art.

The utility model can be used in personal protective equipment for military personnel, as well as police, security and collection officers. Thus, the claimed technical solution meets the patentability criteria "novelty" and "industrial applicability".

The figure 1 shows a schematic view of the proposed flexible combined armored package.

The proposed flexible combined armor package consists of 3 parts: front 1, middle 2 and back 3. The armor package contains alternating at least 2 layers of aramid fabric with hydrophobic treatment of the front part 1, then at least 2 layers of UHMWPE middle part 2 and at least 2 layers of aramid fabric with a hydrophobic treatment on the back 3, collected in one bag. The use of sealed covers for UHMWPE is not required, since a separate package is not formed from these layers. The number of layers of aramid fabric and UHMWPE depends on the impactor against which the protective structure is made, and is selected experimentally.

For example, for protection against APS pistol bullets (Br1 protection class according to GOST 34286-2017), the structure can be as follows: 4 ^... 6 layers of fabric made of Kevlar thread with a density of 255 g / m ² , 8 ... 4 layers of Kevlar thread with a density of 255 g/m ² . In this case, the structure will have the following characteristics (for comparison, structures consisting of only aramid fabric or UHMWPE are presented):

Second example. To ensure anti-fragmentation resistance V50 = 630 m / s when tested with a fragment simulator (steel ball weighing 1 g) according to GOST 55623-2013 - the structure can be as follows: 24 layers of fabric from Rusar thread with a density of 165 g / m ² , 10 layers of UHMWPE with a density of 150 g / m ² and 2 layers of fabric from the Rusar thread with a density of 165 g / m ² .

Or this: 21 layers of fabric from Rusar thread with a density of 165 g/m ² , 19 layers of UHMWPE with a density of 150 g/m ² and 2 layers of fabric from Rusar thread with a density of 165 g/m ² .

The structures of the last two examples will have the following characteristics (constructions consisting of only aramid fabric or UHMWPE are presented for comparison):

With the same density of the armor package, you can use the existing equipment and ensure the ballistic resistance of the product when wet. The mass and cost characteristics of such an armor package are reduced.

When using a flexible combined armor package, the interaction of a blunt striker (bullet) with textile armor occurs in several stages: the initial crushing of the layers of aramid fabric of the front part of 1 armor package, the subsequent transfer of the energy of the striker (bullet) into the energy of stretched threads until they break and pulling the threads out of the fabric with dissipation energy for friction. The next impact on the middle part 2 of the UHMWPE armor package will be less intense. When wet, the UHMWPE threads of the middle part 2 of the armor pack are more likely to move apart than to stretch to break. Pulling apart the threads is a less energy-intensive mechanism, therefore, when wet, the protective properties of UHMWPE are reduced. When wet, all layers of UHMWPE of the middle part 2 of the armor pack break through, but at the same time they reduce the speed of the impactor (bullet) so much that it can be retained by the layers of aramid fabric of the back layer 3, which have not lost strength due to the technologically applied hydrophobic treatment.

The technical result of a flexible combined armor package according to this utility model is:

- ensuring ballistic resistance when operating in a wet state (when the product gets wet);

- reducing the cost of the entire armor package by replacing layers of expensive aramid fabric with layers of cheap UHMWPE;

- compared to armor packages made of heavy aramid fabrics made of Kevlar and Twaron threads, you can get a weight gain of up to 15%;

- the absence of the need to use sealed covers for UHMWPE allows you to save the standard technology of tailoring and edging of the armored package without the use of special equipment.

Claims (1)

A flexible combined armor package containing a front part formed from several layers of aramid fabric with hydrophobic treatment, a back part, layers of ultra-high molecular weight polyethylene (UHMWPE), characterized in that the back part of the armor package is formed from several layers of aramid fabric with hydrophobic treatment, and UHMWPE layers are placed between front and back parts as the middle part of the armored package in such a way that all layers of the armored package are assembled and edged into a single package.

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