Resistant to penetration of a material containing fabric with a high ratio of linear densities of the two systems of threads, and the product thereof

 

(57) Abstract:

The proposed material and the product are the means intended for protection against penetration, in particular from bullets. Resistant to penetration of the material contains at least a double layer fabric consisting of two layers of fabric stacked cross at an angle. The fabric consists of a first set of threads, arranged with a density of 3.5 to 20 threads/cm and having a linear density of at least 420 dtex, and a second set of threads, arranged with a density of 0.5 to 8 threads/cm and having a linear density of at least 50 dtex. The second set of threads is in a transverse direction with respect to the first set of threads. The ratio of the linear density of the yarns of the first set to the linear density of the yarns of the second set more of 4.2. The ratio of the density of packing of the filaments of the first and second sets is greater than 1. The first set of threads comprises aramid fibers. The threads of the second set of threads of the complex polyester, polyethylene, polypropylene, and aramid. The first set of yarns is warp threads and the second threads of the weft. Yarn layers of the double layer bonded together with an adhesive. At least one of the outer sides of the material provided with a protective layer. Yerala, described above. The proposed material and the product thereof to provide enhanced protection against penetration due to high-deflecting ability. 2 S. and 9 C. p. F.-ly.

The invention relates to resistant to penetration of a material containing fabric with a high ratio of linear densities of the two systems of threads, and to the products made from this material.

In this area known for resistant to the penetration of products such as bulletproof vests, helmets, panels of vehicles and shields made of high-strength fibers. For many applications, in particular, for ballistic vests, use of fiber in the form of fabric or knitted material. These materials can be applied in the form of a coating on the matrix material, or they may be impregnated with the matrix material for the production of rigid ballistic material, or can be used without matrix material to obtain soft ballistic materials.

Bulletproof woven materials are known, inter alia from European patent EP 310199. The materials described in this patent consists of a filament yarn of polymer ultra-high molecular weight with high strength, visocity duck.

In the patent of Russia RU 2096542 described ballistic material for bulletproof jackets, containing the warp and weft of polyparaphenyleneterephtalamide (RTA), in which the ratio of the linear density of warp and weft less 4,17. Described the yarns having a linear density 143-588 decitex, and weft yarns having a linear density 588-930 decitex, and weft threads are of equal or greater linear density than the warp threads. Especially noted that the ballistic materials in which the ratio of the linear density of warp and weft threads is 1,59-4,17 have improved deflecting ability.

Known for resistant to penetration of a material containing at least a double layer of fabric consisting of two layers of fabric stacked cross at an angle (RF patent 2042915).

Also known made resistant to the penetration of the material (RF patent 2077020).

Found that are resistant to penetration of a material containing at least a double layer of fabric consisting of two layers of fabric which are cross under an angle, wherein the fabric consists of a first set of threads located with a density of 3.5 to 20 threads/cm and ITA/cm and having a linear density at least 50 dtex, with the second set of threads is in a transverse direction with respect to the first set of threads, and the ratio of the linear density of the yarns of the first set of threads to the linear density of the yarns of the second set more of 4.2, and the ratio of the number of threads/cm of the first set to the number of threads/cm of the second set is greater than one, have superior ballistic properties.

Preferably resistant to the penetration of the material had a linear density of yarns of the first set to the linear density of the yarns of the second set more of 7.5. The number of threads/cm of the first set is 3.5 to 20 threads/see More preferably the number of threads/cm is 4-15 threads/cm, and most preferably 5-12 threads/see the Number of threads/cm of the second set is 0.5-8 threads/see More preferably the number of threads/cm is 1-6 threads/cm, and most preferably 2-4 threads/see For reasons of production efficiency, it is preferable that the first set of threads represented the warp threads and the second set of threads of the weft threads. The second set of threads is in a transverse direction with respect to the first set of threads. Although usually these sets are approximately perpendicular to each other, it is not CLASS="ptx2">

Resistant to penetration of the material also contains a second set of threads (preferably a set of weft threads), whose chemical composition does not play a decisive role in the present invention. It is preferable, however, that these threads had a high strength and high modulus. This is particularly important when these strands are selected from a range including: the threads of a complex polyester, polyethylene, polypropylene, polyamide and aramid. Most preferably, the second set of threads was made of threads of a complex of the polyester.

The threads of the first set (preferably the warp) possess high strength and high modulus, and the most preferred aramid yarn, more specifically - p-aramid filaments. Most preferred are polyparaphenyleneterephtalamide (RRTA). In a preferred embodiment of the invention the warp and weft are chosen so that they were made of various polymers, for example, the preferred fabric containing yarns of para-aramid and weft threads of the complex polyester.

When satisfied the required ratio of the linear density linear density of the yarns of the first set are chosen so that it was at least about 420 decex. The linear density of the yarns of the second set should be at least about 50 dtex, more preferably 50-280 dtex, and most preferably about 80 to 140 dtex.

The term "thread" refers to any type of yarn, for example, staple yarn, twisted staple yarn, woven filament, untwisted yarn from blended fibers, and preferably untwisted filament.

In a preferred embodiment of the invention the threads of each of two layers of two-layer fabric connected together, for example, pristegivaniem or, preferably, the adhesive material. Adhesive material may be an adhesive deposited on the yarn or fabric, for example, in the form of a finishing composition. Adhesive material may also be an adhesive layer between the two layers of fabric double layer. The number of adhesive materials include: thermoplastic, elastomeric and thermoset material. You can also use, at least for the manufacture of the second set of threads of a material which melts under pressure and/or heating, thus enabling the connection threads of the first set of threads of the second set and also the connection of the two layers of fabric m polyamide, complex polyester or mixtures of these materials. Elastomeric materials include Kraton, rubber, silicone, etc., Thermosetting materials include epoxy, resin complex polyester, phenol-aldehyde resins, polymers of vinyl esters, etc.

In another preferred embodiment of the invention, at least one of the outer sides resistant to penetration of materials provide a protective layer. The protective layer may be thermoplastic or elastomeric material, or a mixture of these materials. The protective layer is applied to protect the fabric from damage when excessive abrasion.

Resistant to penetration of the material contains at least one double layer consisting of two layers of fabric, which is laid a cross at an angle and choice are connected with one another. The term "fabric" refers to all types of tissues, for example, plain, sateen weave, weave "Gunny", twill weave, etc., are Preferred fabric with a plain weave.

Resistant to the penetration of the materials may contain at least one double layer consisting of two layers of fabric, but usually impose on each other is inym - 6-35 double layers. At least one double layer of two layers of fabric come together at an angle. The preferred angles are 30-90o. Angle 90ois the most preferred. For soft protective equipment the greatest effect is achieved by using a material in which layers of fabric in all double layers are at an angle, preferably at an angle of 90o. The first set of threads of the first layer fabric, double layer can be positioned parallel or at an angle to the first set of threads of the first layer of fabric adjacent dual layer.

Double layers are attached to each other using an adhesive layer or postegivanie. Such an adhesive layer can be made of the above-mentioned adhesive substance and he has a thickness 4-36 μm, preferably 8-20 μm.

Methods of making double layers are well known in the art. Usually the fabric is made by winding the warp on a warping beam, followed by weaving on a loom. A single layer may be impregnated or laminated, and may be subjected to calendering. At least two layers of fabric can be joined together, preferably at an angle to each other, p is PA bulletproof vests and protective plates, made from the above-mentioned tissue according to methods known to experts in this field of technology.

The invention is illustrated below by the following examples.

Example 1

The design I was made according to the present invention. The design contains 21 double layer fabric weighing about 100 g/m2made of warp Kevlarwith a linear density of 1100 dtex (DuPont) (8.6 threads/cm) and weft threads of a tough polyester with a linear density of 140 dtex (Trevira710 firm Hoechst) (2 threads/cm). The ratio of the linear density of warp threads to the linear density of weft yarns was 7.9. The layers were laminated together with two layers of plastic film of low density polyethylene (LDPE) firm HRH) with a thickness of 10 μm. The total surface density of the design I was 4300 g/m2.

Design II was manufactured according to the present invention and contained 20 double layers of the same fabric used in the construction of I, and one layer of plastic film of low density polyethylene (LDPE) firm HRH) with a thickness of 10 μm on both outer sides of the double layer and between every two layers of fabric DV is was determined using bullet 9 x 19 type Para DM AV, where50- the velocity at which 50% of the bullets stopped and 50% of the bullets completely penetrates. It was found that V50for the design I is 471 m/s, and for the design II - 481 m/s

Example 2

Design III was manufactured similar to the design I from 19 layers of Twaron yarnwith a linear density of 930 dtex (from cellulose triacetate 709 Microfilament, Akzo-Nobel), not from Kevlar (the density of the warp - 10.4 threads/cm, the density of the weft threads 2 threads/cm, the ratio of the linear density of warp threads to the linear density of weft threads and 6.6). The total surface density design III was 4330 g/m2the velocity V50(defined using bullets 9 x 19 type Para DM 11A1B2) was 490 m/s

Comparative example 3

Design IV was made of 22 fabric layers of Twaronof cellulose triacetate 709 (Akzo Nobel). The warp and weft are made of Twaron yarnwith a linear density of 930 dtex Microfilament (Akzo-Nobel) (the density in the warp and weft - 10.5 threads/cm; the ratio of the linear density of main and weft threads was 1). The total surface density structure IV accounted for the S.

Example 4

Design V was made of 50 double layers of fabric made from yarns Twaronwith a linear density of 930 dtex (density-based - 9.5 threads/cm, the density on a duck - 2 threads/cm; weft threads from Trevira710 with a linear density of 140 dtex; the ratio of the linear density of warp and weft threads 6.6).

The layers were laminated to each other using the copolymer binder of LDPE (the resin content 35%) at a temperature of 115oC and a pressure of 2.5 MPa. The total surface density structure V was 6500 g/m2the velocity V50(defined using bullets 0,357 Magnum FJ CB SC) was 484 m/s

Comparative example 5

Design VI was made of 44 fabric layers of Twaronof cellulose triacetate 709 (linear density of 930 dtex, 200 g/m2, plain weave). The material was covered by the modified polymer polyvinylbutyral (tar 23%) and is laminated at a temperature of 160oC and a pressure of 1.0 MPa. The total surface density was 10800 g/m2the velocity V50(defined using bullets 0,357 Magnum FJ CB SC) amounted to 487 m/s

When using the mentioned VTI reduced without reducing the value of the velocity V50.

1. Resistant to penetration of a material containing at least a double layer of fabric consisting of two layers of fabric stacked cross at an angle, characterized in that the fabric comprises a first set of threads, arranged with a density of 3.5 to 20 threads/cm and having a linear density of at least 420 dtex, and a second set of threads, arranged with a density of 0.5 to 8 threads/cm and having a linear density of at least 50 dtex, with the second set of threads is in a transverse direction with respect to the first set of threads, and the ratio of the linear density of the yarns of the first set to the linear density of the yarns of the second set more of 4.2, and the ratio of the density of packing of the filaments of the first and the second set is greater than 1.

2. The material under item 1, characterized in that the yarn layers of the double layer bonded together, preferably with an adhesive.

3. The material under item 1 or 2, characterized in that the ratio of the linear density of the yarns of the first set to the linear density of the yarns of the second set more of 7.5.

4. Material according to any one of paragraphs.1-3, characterized in that the first set of threads comprises aramid fibers.

5. Material according to any one of paragraphs.1-3, characterized in that the threads of the second loubomo of PP.1-5, characterized in that the first set of threads comprises aramid yarns and a second set of yarns composed of filaments complex polyester.

7. Material according to any one of paragraphs.1-6, characterized in that the linear density of the yarns of the first set is 420-3360 dtex, preferably 420-1680 dtex, and most preferably 840-1100 decitex.

8. Material according to any one of paragraphs.1-6, characterized in that the linear density of the yarns of the second set is 50-280 dtex, and preferably 80-140 decitex.

9. Material according to any one of paragraphs.1-8, characterized in that the first set of set of yarns is warp threads and a second set of threads is the weft threads.

10. Material according to any one of paragraphs.1-9, characterized in that at least one of the outer sides of the material provided with a protective layer.

11. Made resistant to penetration of a material according to any one of paragraphs.1-10.

 

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10 cl, 1 dwg

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