JP2007512975A - Blade-proof insert with steel cord and non-woven fabric - Google Patents

Abstract

  The blade insert (10) for protective textiles comprises at least one metal layer of fabric with metal wires or metal cords (12) and at least one fiber layer (14, 16). The fiber layer is in contact with and connected to the metal layer. The fiber layer contains a nonwoven material (14, 16). This blade insert has a high level of blade protection and exceptional comfort.

Description

  The present invention relates to a blade-proof insert for protective textiles. The anti-blade insert comprises at least one metal layer and at least one fiber layer. The invention further relates to a protective textile comprising such a blade-proof insert.

  Protective textiles are becoming more and more important as violence is becoming more common as violence often occurs in the form of attacking people with a dagger or cutting baggage with a knife and stealing .

  Synthetic fibers such as aramid fibers and high density high molecular weight polyethylene fibers have proven to be suitable for antiballistics. However, these fibers do not perform well with respect to stabs such as knives and daggers. This is due to the inherent vulnerability of these synthetic fibers to lateral resistance (this property applies to all synthetic fibers). Metals, particularly steel, have greater resistance to radial compression.

  This property of metal and steel has already been recognized in the prior art. EP 0 769 671 A1 discloses a blade-proof material comprising a set of metal strands that are fixed to a non-metallic support fabric. These metal strands are unidirectional. U.S. Pat. No. 5,883,018 discloses optimization for use of metal strands in blade protection materials. Steel cords twisted at two or more different angles are used to increase the possibility of resting the piercing knife. WO 98/45516 discloses a blade-proof material in which a grid is formed of steel cords, ie both weft and warp yarns are formed of steel cords. German utility model No. 20007820 discloses a combination of blade-proof material and ballistic material. This blade-proof material is formed by a chain. Such a chain has the advantage that it is extremely flexible, but has the disadvantage that it has no shape stability. In order to impart shape stability to the blade-proof material, chain heads are fixed or bonded to the nonwoven material at their edge portions. In the situation where the bullets are flying, if the bullets break the broken chains into pieces, the nonwoven fabric catches these fragments and prevents them from penetrating into the body.

  Protective clothing and textiles are always subject to conflicting requirements. On the one hand, comfort requirements encourage designers to use less material. On the other hand, safety standards increase the amount of shock-absorbing and blade-proof materials.

  The object of the present invention is to avoid these drawbacks of the prior art. Yet another object of the present invention is to provide a material that provides both comfort and safety for a protective textile. Another object of the present invention is to provide metal and fiber interaction and synergy.

  According to the present invention, a blade-proof insert for a protective textile can be provided. The insert comprises at least one metal layer of fabric made of metal cord or metal wire and at least one fiber layer. The fiber layer is in contact with and connected to the metal layer. The fiber layer includes a non-woven material.

  The “nonwoven fabric material” refers to a material including a fibrous structure manufactured by a dry method, a wet method, an air lay method, a needle punch method, a spun bond process, a hydroentanglement method, or the like. “Nonwoven fabric material” does not include woven, knit, and tufted structures. “Nonwoven” refers to a fabric in which the fibers are mechanically entangled or chemically bonded to each other.

  The use of a nonwoven material connected to the metal layer leads to blade protection.

  The metal wire or metal cord of the metal layer is usually ordinary carbon steel or stainless steel. In the case of carbon steel, the wires and cords are preferably coated with a corrosion resistant coating material such as zinc or a zinc alloy (eg, zinc-aluminum alloy).

  In a metal layer fabric, metal cords or metal wires may be arranged in parallel. The distance between two adjacent metal cords or metal wires ranges from 0.40 mm to 3.20 mm, for example 0.50 mm to 3.0 mm.

  Next to the advantages of improved blade protection, the additional advantage of contacting and bonding the non-woven fiber layer to the metal layer is that when the metal fiber composite is cut to form the blade insert, the fabric The unwoven fiber layer can prevent the form of wire or cord from unwinding.

  In the first embodiment of the invention, the metal wires or metal cords are oriented in one direction within one single metal layer, i.e. the elongated metal elements do not intersect each other. The metal elements are bonded to the nonwoven material with an adhesive or with a thermoplastic film to reduce the possibility of the elongated metal elements moving towards each other. In this first embodiment, preferably two or more metal layers are provided. In the case of multiple metal layers, the elongated metal elements of each metal layer are arranged so that the elongated metal elements are directed in at least two different directions. If the knife has penetrated into the first metal layer and the second or next metal layer has a direction different from the direction of the first layer, it stops at the second or next metal layer. Increase the likelihood of Similarly, the probability that the knife will stop increases as the number of metal layers increases. However, the number of metal layers is limited for weight and stiffness reasons. Up to six unidirectional metal layers are possible. Two, three and four unidirectional layers are preferred.

  In the second embodiment of the present invention, at least one metal layer in a plurality of directions such as two directions is provided. This means that the elongated metal elements intersect each other within one single metal layer. This can be achieved by welding or weaving the weft and warp elongated metal elements. Preferably, weft and warp elongated elements are knitted. Preferably, the weft and warp elongated elements are formed at right angles (90 °) to each other. The nonwoven material is adhered to the metal layer by either adhesive, thermoplastic film or stitching. The metal layer of this second embodiment has the disadvantage that it is somewhat more rigid than the single metal layer (unidirectional) made in the first embodiment, but as a final insert form The advantage is that the number of metal layers required to obtain the same blade-proofing property can be reduced. One or two metal layers in multiple directions are preferred. The reduction in the number of metal layers in the second embodiment can provide higher flexibility or lighter weight than the first embodiment.

  In both the first and second embodiments, the inventors have experienced that it is beneficial if a portion of the nonwoven material penetrates between the elongated elements of the metal layer. This is so that the fibers are no longer oriented only two-dimensionally in the plane of the nonwoven material, but some fibers are also oriented in a plane perpendicular to the plane of the nonwoven material, for example This can be achieved by needle felting the nonwoven material. In this way, some fibers protrude from the plane of the nonwoven material and penetrate between the elongated elements. This penetration reduces the possibility of the elongated elements moving towards each other. The presence of adhesive or stitching highlights this effect.

  The nonwoven material preferably includes synthetic fibers. Most preferably, the nonwoven material comprises synthetic fibers known to have an impact absorbing action. Examples of such synthetic fibers include aramid fibers, para-aramid fibers, high-density high molecular weight polyethylene fibers, poly (p-phenylene-2,6-benzobisoxazole) fibers (PBO fibers), and polybenzimidazole fibers (PBI fibers). Or a combination thereof.

  In the blade-proof insert, each metal layer may contact and connect with the two fiber layers one by one on both sides thereof.

  The present invention further relates to a protective textile with a blade-proof insert as described above. The protective textile usually further comprises a bulletproof insert. Bulletproof inserts are usually placed on the side closer to the body, and bladeproof inserts are usually formed as exterior parts.

  Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a partial sectional view of a blade-proof insert 10 according to the present invention. The blade-proof insert 10 has a single unidirectional layer in which a plurality of steel cords 12 are arranged in parallel to each other. The steel cord 12 is a 3 × 3 × 0.18 type steel cord in this embodiment. The steel cord 12 forms a warp yarn having a woven structure. The weft (not shown) is made of impregnated nylon. The weft may be formed by aramid fibers or high density high molecular weight polyethylene fibers. The distance between the steel cords is 2.2 mm. In general, this spacing may vary from 0.4 mm to 3.2 mm, such as from 0.5 mm to 3.0 mm. This spacing is measured as the pitch between chords, ie between the chord axes. Above the steel cord 12 layer is a non-woven fabric 14 and below the steel cord 12 layer is a non-woven fabric 16. The nonwoven fabric is a needle felt composed of polyacrylate fibers, para-aramid fibers, and oxidized polyacrylonitrile fibers. It has a thickness of about 2.30 mm (± 0.30 mm) and a weight of about 80 g / m ² (± 8%). Both nonwovens 14 and 16 are adhered to the layer of steel cord 12 by a thin thermoplastic film, such as polyamide. For example, an adhesive such as an acrylate adhesive or a polyurethane adhesive can be used. Due to the nature of the nonwoven needle felt, some of the fibers 19 are oriented in a third direction, i.e., perpendicular to the plane of the nonwoven, and penetrate through the openings between the steel cords 12.

  FIG. 2 shows a first embodiment of the present invention. The blade insert has four different parts 10, 20, 30 and 40. These portions 10, 20, 30 and 40 are similar to the structures of FIGS. 1a and 1b, respectively. That is, each portion 10, 20, 30 and 40 comprises a layer of steel cords 12, 22, 32 and 42 sandwiched between two nonwovens. The distance between individual steel cords varies from 0.5 mm to 3.0 mm. The typical shape of each portion 10, 20, 30 and 40 corresponds to the male back. This typical shape can be obtained by laser cutting. An additional advantage of using the nonwoven fabric according to the present invention is that it can prevent the steel cord from unwinding either before or after laser cutting. That is, a non-woven fabric is advantageous for the integrity of the insert. The presence of the adhesive highlights this advantage.

  The insert as an anti-blade element according to the first embodiment of FIG. 2 is combined with a bullet-proof element having multiple layers of high-density high molecular weight polyethylene fibers (known as DYNEEMA® fibers in the market). Proven to be successful. The presence of the anti-blade insert reduces the number of DYNEEMA® fiber layers required. The reason is that the outer part is formed by a blade insert, which already stops the bullet or at least reduces the speed of the bullet.

  FIG. 3 shows a second embodiment of the present invention. The blade insert 50 comprises a metal layer having steel cords 52 and 53 that intersect each other. This metal layer may be formed by a woven structure in which both the weft and the warp are steel cords. The distance between the weft steel cords 52 is in the range of 0.5 mm to 3.0 mm. The distance between the warp steel cords 54 is in the range of 0.5 mm to 3.0 mm. There is a non-woven fabric 54 on the metal woven structure, and there is also a non-woven fabric under the metal woven structure (not shown). The nonwoven fabric is bonded to the metal layer by an adhesive or stitching. The typical shape of the anti-blade insert 50 corresponds to the front of the woman. Also in this case, the shape is realized by laser cutting. This second embodiment has proven to be particularly successful as a blade-proof element when combined with a stack of layers of para-aramid fibers or aramid fibers as bulletproof elements.

The present invention is not limited to a particular type of elongated metal element. Metal wires or metal threads are suitable. However, for reasons of flexibility coupled with safety reasons, metallic multi-strand metal cords with fairly thin filaments, ie filaments with diameters ranging from 0.03 mm to 0.25 mm, are preferred. Multi-strand metal cords are usually of the mxn type, where m is the number of strands and n is the number of filaments in one strand. An example of a multi-strand cord is
3x3,
7x3,
7x4,
4x7,
3 + 5 × 7,
7 × 7.
This does not exclude other code types. Other code types may be the following general structure types.
l + m (+ n): l core filaments, m filament layers, and any n filament layers.
n × 1: n filaments are twisted together.
m + n: m filaments are in parallel, surrounded by n filaments, and n filaments are twisted together and around the m filaments.
1 × nCC: a compression cord in which n filaments are all twisted in the same twist direction using the same twist step.

  The present invention is not limited to a particular type of coating on the metal cord in the metal layer. However, when blade inserts are used in protective textiles that need to be cleaned or washed, such as metal cords made from stainless steel or zinc or zinc aluminum alloys (2% to 9% aluminum) Steel cords coated with a corrosion resistant coating material are preferred. The present invention is suitable for all common and available end products having a tensile strength of 1500 MPa to about 3500 MPa or more.

It is a fragmentary sectional view of the blade prevention insert concerning the present invention. FIG. 1b is an enlarged view of FIG. 1a. It is a mimetic diagram showing a 1st embodiment of the present invention. It is a schematic diagram which shows 2nd Embodiment of this invention.

Claims (12)

At least one metal layer of the fabric with a metal cord or metal wire;
A blade insert for protective textile comprising at least one fiber layer in contact with and connected to the metal layer,
The blade-proof insert, wherein the fiber layer contains a nonwoven material.   The blade-proof insert according to claim 1, wherein the cloth includes a plurality of metal cords or metal wires arranged in parallel, and a distance between the metal cords or the metal wires is in a range of 0.04 mm to 3.2 mm. .   The blade-proof insert according to claim 2, wherein the plurality of elongated metal elements are unidirectional within the metal layer, and the elongated metal elements are bonded to the nonwoven material with an adhesive or a thermoplastic film.   The blade insert according to claim 3, wherein the insert comprises two or more metal layers.   The blade prevention insert according to claim 4, wherein the two or more metal layers have different directions of the elongated metal element.   The blade-proof insert according to claim 2, wherein the blade-proof insert has a plurality of directions in the at least one metal layer.   The blade-proof insert according to claim 6, wherein the nonwoven material is bonded to the metal layer by an adhesive, a thermoplastic film, or stitching.   A portion of the nonwoven material penetrates between the elongated metal elements to reduce the likelihood of movement of the elongated metal elements within the metal layer. Blade-proof insert.   The blade-proof insert as described in any one of Claims 1-8 in which the said nonwoven fabric material contains a synthetic fiber.   More than 30% of the synthetic fibers are from aramid fibers, high density high molecular weight polyethylene fibers, poly (p-phenylene-2,6-benzobisoxazole) fibers, polybenzimidazole fibers, or any combination thereof. The blade-proof insert according to claim 9, which is selected from the group consisting of:   The blade-proof insert according to any one of claims 1 to 10, wherein each metal layer is in contact with and connected to the fiber layer on both sides thereof. A protective textile product comprising the blade-proof insert according to any one of claims 1-11.

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