JP2020146985A - Composite material and laminate and protective article using the same - Google Patents

Abstract

To provide a composite material which is excellent in both bulletproof performance and knife-proof performance and is likely to follow a body while being light-weight, and a laminate and a protective article including the same.SOLUTION: There are provided a composite material has a fabric and a layer of a resin coated onto at least one surface of the fabric, in which the resin has scratching hardness (pencil method) according to JISK5600-5-4 of H or harder and tensile elongation according to JISK7127 of 10% or less, and the composite material has tensile strength of 30 N/mm2 or more; and a laminate and a protective article using the same.SELECTED DRAWING: Figure 1

Description

The present invention is predominantly packed with composite materials used to protect the body from flying debris and bullets, as well as blades such as ice picks, single-edged and double-edged blades, and composites of the composites, the composites or laminates. Regarding protective articles.

Police officers, guards, soldiers, etc. are tolerant as necessary to protect their safety from attacks by firearms from criminals, terrorists, enemy soldiers, suspicious persons, etc., and attacks by debris and cutlery flying due to the explosion of explosives. Engage in duties by wearing protective members with elastic and blade-proof performance.

Conventionally, high-strength fibers such as para-aramid fibers, polyethylene fibers, polyparaphenylene benzobisoxazole fibers, and other woven fabrics and knitted fabrics, and resins are applied to these woven fabrics and knitted fabrics as materials for members having bulletproof performance. Alternatively, impregnated ones and shield materials made by using these fibers are known. The shield material referred to here is a bulletproof material obtained by laminating and molding a laminate of sheets impregnated with resin by arranging high-strength fibers at right angles to 0 and 90 degrees and impregnating the resin. Say. Although these materials have excellent bulletproof performance, few have bladeproof performance.

As the member having the blade-proof performance, for example, a metal plate such as titanium or duralumin plate as described in Patent Document 1 is used.

However, metal has a large specific gravity, and a metal plate having a thickness sufficient to prevent a blade has low bendability and is difficult to follow the body.

In the prior art, a member having the above-mentioned bulletproof performance and a metal member having the blade-proof performance are often combined to form a protective member.

Patent No. 5664851

An object of the present invention is to provide a composite material which is excellent in both bulletproof performance and blade-proof performance, is lightweight and easily follows the body, and a laminate containing the composite material and a protective article.

In order to solve the above problems, the present invention has the following configurations.
(1) A composite material having a cloth and a resin layer applied to at least one side of the cloth, and the resin has a scratch hardness (pencil method) of H or more according to JIS K5600-5-4 and A composite material having a tensile elongation of 10% or less and a tensile strength of the composite material of 30 N / mm ² or more according to JIS K7127.
(2) The amount of the resin in the composite material is in the range of 5 to 40% by weight with respect to the total amount of the cloth and the resin, and the basis weight of the cloth per composite material is 550 g / m ² or less. The composite material according to (1).
(3) The composite material according to (1) or (2), wherein a high-strength fiber having a tensile strength of 17 cN / dtex or more is used as the fiber constituting the fabric.
(4) A thermoplastic resin having a shore hardness (type D) of 60 or more, wherein the resin contains at least one of a polyester resin, a polyurethane resin, an acrylic resin, a polycarbonate resin, a polystyrene resin, and a fluorine resin. The composite material according to any one of (1) to (3).
(5) The cloth is a woven fabric or knitted fabric, a uniaxial structure in which fibers are aligned in a uniaxial direction, or a multiaxial structure in which the aligned fibers are laminated at a plurality of angles, (1) to The composite material according to any one of (4).
(6) The composite material according to any one of (1) to (5), wherein the thickness per sheet is 1 mm or less.
(7) The composite material according to any one of (1) to (6), wherein the Gale rigidity / softness per sheet is 13 mN or more and 1100 mN or less in both vertical and horizontal directions.
(8) A laminated body in which a plurality of layers containing the composite material according to any one of (1) to (7) are laminated, and adjacent layers in the stacking direction are 90% or more of the single layer area and are not fixed to each other. ..
(9) A laminated body in which a plurality of layers containing the composite material according to any one of (1) to (7) are laminated, and the total weight is 11 kg / m ² or less.
(10) A protective article in which the composite material according to any one of (1) to (7) or the laminate according to (8) or (9) is packed with a film having a thickness of 5 μm or more and 1 mm or less.
(11) The protective article according to (10), which has a blade-proof property that satisfies level 1 of impact energy (E1) at an incident angle of 0 ° according to the criteria specified in NIJ Standard-0115.00.
(12) The protective article according to (10) or (11), which has elasticity resistance satisfying Level IIIA according to the criteria specified in NIJ Standard-0101.06.

INDUSTRIAL APPLICABILITY According to the present invention, it has become possible to obtain a composite material which is excellent in both bulletproof performance and blade-proof performance, is lightweight and easily follows the body, a laminate containing the same, and a protective article.

It is a perspective view of the composite material which concerns on one Embodiment of this invention. It is a schematic perspective view of the laminated body which concerns on one Embodiment of this invention. It is a schematic block diagram of the protective article which concerns on one Embodiment of this invention.

Hereinafter, the present invention will be described in detail together with embodiments.
The composite material of the present invention comprises a fabric and a composite material having a layer of resin applied to at least one side of the fabric. The resin to be applied is a resin having a scratch hardness (pencil method) of H or more according to JIS K5600-5-4 and a tensile elongation of 10% or less according to JIS K7127. If the scratch hardness is less than H, sufficient blade-proof performance may not be exhibited. Further, a soft resin having a tensile elongation of more than 10% may not have sufficient blade-proof performance.

The method for applying the resin is not particularly limited, but a wire bar coat, a knife coat, a doctor coat, a founding, a reverse coat, a dip nip and the like can be used.

The composite material of the present invention made of the cloth coated with the above resin needs to have a tensile strength of 30 N / mm ² or more. This tensile strength was determined as a force per cross section (mm ² ) when the composite material broke by dividing the value measured according to JIS L1096 (2010) by the cross section of the composite material. The cross-sectional area referred to here is a value indicating the product of the width and the thickness in the direction perpendicular to the tensile direction of the composite material. If this tensile strength is less than 30 N / mm ^2, there is a possibility that sufficient blade resistance and elasticity cannot be exhibited.

It is preferable that the amount of resin in the composite material is in the range of 5 to 40% by weight with respect to the total amount of the cloth and the resin, and the basis weight of the cloth per composite material is 550 g / m ² or less. If the amount of resin is less than 5% by weight, sufficient blade resistance may not be exhibited, and if it exceeds 40% by weight, the fibers may be hardened and energy diffusion may become difficult, resulting in deterioration of bulletproof performance and the body. It may be difficult to follow. Further, when the basis weight of the fabric exceeds 550 g / m ² , the followability to the body and the blade resistance may be deteriorated.

High-strength fibers are preferably used as the fibers constituting the fabric, and the high-strength fibers to be used preferably have a tensile strength of 17 cN / dtex or more, more preferably 19 to 40 cN / dtex. Specifically, aromatic polyamide, aromatic polyetheramide, total aromatic polyester, ultrahigh molecular weight polyethylene, polyvinyl alcohol, polyparaphenylene benzobisoxazole, polybenzimidazole, polyimide, polyetheretherketone, polyetherimide, Fibers composed of polyphenylene sulfide, novoloid, polypyridobis imidazole, polyarylate, polyketone, polytetrafluoroethylene, polyoxymethylene, polyacrylonitrile, polyamideimide, polyetherketone, etc. can be mentioned. Para-aramid fibers and long fibers of ultra-high molecular weight polyethylene can be particularly preferably used from the viewpoint of productivity and price.

In the composite material according to the present invention, the shore hardness (type D) of the resin applied to the fabric is preferably 60 or more, and more preferably 80 or more. If the shore hardness is less than 60, the amount of coating and the number of layers may increase in order to obtain blade-proof performance, and the weight may not fit in a weight suitable for wearing.

The resins to be applied to the fabric include polyester resin, polyurethane resin, acrylic resin, polycarbonate resin, polystyrene resin, fluorine resin, phenol resin, epoxy resin, vinyl ester resin and polyimide resin, polyethylene, polypropylene. Such as polyolefin resin, polyamide, polyvinyl acetate, polyether sulfone, polyphenylene sulfide, polyether ketone and the like can be used. Among them, thermoplastic polyester resins, polyurethane resins, acrylic resins, polycarbonate resins, polystyrene resins, and fluororesins can be preferably used from the viewpoints of coatability, price, bendability, blade resistance, impact resistance, and the like. .. Further, the water-dispersible, amorphous copolymer polyester resin can be particularly preferably used in terms of environmental friendliness during processing, reduction of damage to the fabric, followability to the fabric, and bendability.

The fabric to which the resin is applied is not particularly limited, such as a woven fabric, a knitted fabric, or a uniaxial or multiaxial structure, but a plain woven fabric having good bullet resistance while retaining the applied resin. A uniaxial or multiaxial structure is preferably used. The uniaxial structure referred to here represents a fiber structure in which fibers are aligned and arranged in a uniaxial direction, and a multiaxial structure is a fiber structure in which aligned fibers are laminated at a plurality of angles. Point to.

The composite material of the present invention preferably has a thickness of 1 mm or less per sheet. If it exceeds 1 mm, the followability to the body may deteriorate.

In addition, the composite material of the present invention preferably has a galley stiffness of 13 mN or more and 1100 mN or less, and more preferably 13 mN or more and 300 mN or less. Above all, it is preferably 13 mN or more and 1100 mN or less in both vertical and horizontal directions, and further preferably 13 mN or more and 300 mN or less. The vertical and horizontal directions here are the warp and weft directions in ordinary woven fabrics, the wale direction in knitting, the course direction, non-woven fabrics, uniaxial structures, and in multiaxial structures, the machine winding direction and machine wound during production. Refers to the width direction. If the Gale stiffness is less than 13 mN, the dent on the non-landing surface becomes large during bullet resistance, and there is a possibility that the dent standard of the NIJ0101.06 level IIIA test cannot be passed. If it exceeds 1100 mN, the followability may be poor even if it is worn on the body, and the wearing feeling may be deteriorated.

An embodiment of the composite material of the present invention is illustrated in FIG. In FIG. 1, resin layers 3 are provided on both sides of the cloth 2 as described above to form the composite material 1. In this case, in order to give the fibers of the cloth 2 a degree of freedom, it is preferable not to completely embed the resin in the cloth 2, and the porosity of the cloth 2 is not controlled.

A plurality of layers containing the composite material of the present invention can be laminated to form a laminated body, and by forming the laminated body, the blade-proof performance and the bulletproof performance can be further improved. The method of laminating the composite material in the laminated body is not particularly limited, but it is desirable to stack the composite materials flat so that they do not adhere to each other so that each layer moves during bullet resistance and easily absorbs energy by utilizing air resistance. The edges and dots can be temporarily fixed with stitches or tape to prevent misalignment during lamination, but in that case, the adjacent layers of the composite material in the lamination direction are not fixed to each other in 90% or more of the single layer area. Is desirable.

A bulletproof material can be combined with the composite material of the present invention. Examples of bulletproof materials are DuPont's Kevlar® XP, Tensylon®, Honeywell's Spectra Shield®, and Gold Flex®, which are multi-axis structures made of high-strength fibers. Etc., but are not limited to them.

The total weight of the laminated body in which a plurality of layers containing the composite material of the present invention are laminated is preferably 11 kg / m ² or less. If the total weight exceeds 11 kg / m ² , it becomes heavy and the wearability may deteriorate.

An embodiment of the laminate of the present invention is illustrated in FIG. In FIG. 2, a plurality of layers containing the composite material 1 configured as described above are laminated to form a laminated body 4, and the adjacent layers are not fixed to each other by adhesion or the like, and the end portions in the surface direction are taped. It is fastened (tape fastening point 5). Not limited to tape fastening, for example, the end portion may be fastened by stitching.

It is desirable that the composite materials of the present invention or laminates containing them are packed with a film. By packing, it is possible to construct a protective article that can be used in a high temperature environment and / or a high humidity environment without impairing the physical properties of the composite material.

The thickness of the film is preferably 5 μm or more and 1 mm or less. If the thickness of the film is less than 5 μm, it is easily torn, and if it exceeds 1 mm, the weight of the protective article may increase or the followability to the body may deteriorate.

The raw materials for the film include phenolic resin, epoxy resin, polyurethane resin, polyester resin, vinyl ester resin and polyimide resin, polyolefins such as polyethylene and polypropylene, polyamide, polyester, polyvinyl acetate, polyether sulfone, polyphenylene sulfide, and polyether. Resins such as ketones and thermoplastic polyurethane, synthetic rubbers such as butadiene rubber, nitrile rubber, acrylic nitrile styrene rubber, and neoprene, or elastomers can be used. It is also preferable to use a vinyl chloride film that can be easily packed with a welder.

The protective article of the present invention preferably has a blade-proof property that satisfies the impact energy (E1) level 1 at an incident angle of 0 ° according to the NIJ Standard-0115.00 standard. Further, it is desirable that the protective article of the present invention has elasticity that satisfies Level IIIA according to the NIJ Standard-0101.06 standard.

An embodiment of the protective article of the present invention is illustrated in FIG. In the protective article 6 shown in FIG. 3, the laminated body 4 or a plurality of composite materials 1 configured as described above are wrapped with a film 7, and four sides are welded and packed with a welder (for example, a vacuum welder). Yes (weld part 8).

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto. First, a method for measuring and evaluating the characteristics used in the present invention will be described.

(Elasticity resistance)
It was evaluated by the V0 test defined by NIJ-Standard 0101.06. For the bullets, 44 Magnum bullets (15.6 g, bullet speed 436 m / s) and 357 SIG bullets (8.1 g, bullet speed 448 m / s) were used to determine the presence or absence of bullet penetration and the depth of the clay dent on the back of the sample. confirmed. Oil clay (Roma Plasticina # 1) was laid on the back side of the bulletproof protective member, which was a sample, and the sample was fixed with a belt. The test was carried out in a test room environment at room temperature of 25 ° C. and humidity of 35%.

Four samples were prepared for one level, two were soaked in water as pretreatment, two were tumbled, and six 44 Magnum bullets and six 357 SIG bullets were fired, respectively, and a total of 24 shots were fired with the four samples. .. No penetration was made in all 24 shots, clay dents of less than 44 mm were evaluated as ◯, and clay dents of less than 30 mm were evaluated as ⊚.

(Bladeproof)
It was evaluated by the blade-proof test defined by NIJ-Standard0115.00. As the blade, Spike, BladeP1 and BladeS1 defined in the Specke & Edged Blade class were used, and the blade piercing test was performed so as to be 24J defined in E1 of protection level 1. All the blades were stabbed three times for each sample, and those with a penetration length of all the blades to the back side of the sample within 10 mm were evaluated as ◯, those within 0 mm were evaluated as ⊚, and those with a result exceeding 10 mm were evaluated as ×.

(Gare stiffness and softness)
Gale stiffness was performed in accordance with JIS L1096 (2010) bending resilience A method. The size of the test piece was 89 mm in length and 25 mm in width. The warp direction of the fabric was taken as the warp and the weft direction was taken as the weft, and three points were measured for each, and the average value was calculated for each of the vertical and horizontal directions.

(Scratch hardness (pencil method))
The scratch hardness (pencil method) was carried out according to JIS K5600-5-4 (1999). To prepare the sample, each resin was coated on "Therapeutic MF", a separator film manufactured by Toray Film Processing Co., Ltd., using "K HAND COATER" manufactured by RK Print Coat Instruments, and dried in an oven at 120 ° C. for 5 minutes. After that, it was obtained by peeling. When coating, the type of bar was appropriately changed so that the thickness of each resin after drying was 20 to 25 μm. The peeled sample was placed on a glass plate, and a distance of 10 mm was measured at a speed of 1 mm / s. The hardness of each pencil was changed and three measurements were taken, and the hardness of the pencil that was not scratched was taken as the hardness of the resin.

(Shore hardness (type D))
Shore hardness was measured using a Type D durometer in accordance with JIS K7215 (1986). The sample was prepared by putting each resin in a petri dish having a diameter of 50 mm, flattening the surface, drying at 80 ° C., and adjusting the thickness after drying to 5 mm. Five points were measured at different locations, and the average value was taken as the shore hardness.

(Tensile elongation)
A resin film was prepared in the same manner as that created with the above scratch hardness, cut to a width of 25 mm and a length of 150 mm, and three points were measured in accordance with JISK7127 / 2/50 (1999), and the average value was taken as the tensile elongation. did.

(Ratio of resin in composite material)
The result of measuring the basis weight of the fabric before applying the resin in accordance with JIS L1096 (2010) was taken as the weight of the fabric. After that, the basis weight of the composite material coated with the resin on the cloth was measured in the same manner, and the value obtained by subtracting the weight of the cloth from the value was taken as the weight of the resin. From these results, the weight ratio between the fabric weight and the resin weight was calculated.

(Tensile strength)
The tensile strength per piece of each composite material was measured according to the JISL1096 (2010) A method. Samples were prepared by the three points in the warp direction (vertical) and weft direction (horizontal), the force of the cross-sectional area (mm ²⁾ per when the composite material is divided by the cross-sectional area of the composite material (mm ²⁾ is broken Asked. The average value was calculated for each of the vertical and horizontal directions.

(Cross section)
The cross-sectional area (mm ² ) of the composite material for determining the tensile strength is the value obtained by measuring the width of the composite material in the direction perpendicular to the tensile direction of the sample used in the tensile test with a caliper and the thickness of the sample. The product of the values measured with a thickness gauge (manufactured by TECLOCK Co., Ltd., model: SM112) was taken as the cross-sectional area.

<Example 1>
Aromatic polyamide fiber Kevlar® K29 (DuPont, strength 20.3 cN / dtex) 1100 dtex is used to create a plain woven fabric with a density of 31 x 31 / inch (2.54 cm) and a grain of 273 g / m ^2. did. A water-dispersed amorphous saturated copolymer resin (plus coat "Z-450" manufactured by Reciprocal Chemical Co., Ltd., scratch hardness (pencil method): 4H, shore hardness 85, tensile elongation 2%) is applied there by a knife coat method. It was applied, dried in an oven at 180 ° C. for 2 min, and wound up. The coating was performed twice on the front surface and the back surface, and the total amount of resin after drying was adjusted to 30 g / m ² . Basis weight of the resulting composite material is 303 g / ^{m 2,} tensile strength longitudinal ^{380N / mm 2, 482N / mm} 2, the Gurley stiffness in horizontal was vertical 28 mN, horizontal 67MN, thickness 0.45mm .. After cooling the composite material to room temperature, it is unwound and cut into a square of 40 cm x 40 cm, and 35 sheets are stacked flat without applying pressure or heat. PVC film (Ply Campus manufactured by Ryoko Plastic Co., Ltd.) (Registered trademark) E5515, thickness 0.15 mm) was sandwiched, and the ends were welded and packed with a welder under vacuum to prepare a protective article. As a result of evaluating the blade resistance and elasticity, both were ◎. The results are summarized in Table 1.

<Example 2>
A composite material was prepared in the plain woven fabric prepared in Example 1 so that the amount of resin was 46 g / m ² . The physical properties of the composite material are shown in Table 1. 16 sheets of the composite material and 7 sheets of the bulletproof material Kevlar (registered trademark) XP103 manufactured by DuPont were laminated and packed in the same manner as in Example 1 to prepare a protective article. As a result of evaluating the blade resistance and elasticity by using the surface to which the impact is applied as a composite material laminated surface, the elasticity was 〇 and the blade resistance was ◎.

<Example 3>
Water-dispersible amorphous unsaturated copolymer resin (plus coat "Z-565" manufactured by Reciprocal Chemical Co., Ltd., scratch hardness (pencil method): 5H, shore hardness 90, tensile elongation 1) on the plain woven fabric prepared in Example 1. %) The composite material was prepared so that the amount of resin after drying was 33 g / m ² . 16 sheets of the composite material and 7 sheets of the bulletproof material Kevlar (registered trademark) XP103 manufactured by DuPont were laminated and packed in the same manner as in Example 2 to prepare a protective article. As a result of evaluating the blade resistance and elasticity using the XP laminated surface as the surface to which the impact is applied, the elasticity was ⊚ and the blade resistance was 〇 as shown in Table 1.

<Example 4>
Water-dispersible amorphous saturated copolymer resin (plus coat "Z-730" manufactured by Reciprocal Chemical Co., Ltd., scratch hardness (pencil method): H, shore hardness 80, tensile elongation 2) on the plain woven fabric prepared in Example 1. %) The composite material was prepared so that the amount of resin after drying was 35 g / m ² . 11 sheets of the composite material / 7 sheets of Kevlar (registered trademark) XP103 manufactured by DuPont were laminated in this order and 11 sheets of the composite material were packed in the same manner as in Example 1 to prepare a protective article. As a result of evaluating the blade resistance and elasticity, both were ⊚ as shown in Table 1.

<Example 5>
A plain woven fabric having a density of 18 × 18 fibers / inch (2.54 cm) and a basis weight of 515 g / m ² was prepared using an aromatic polyamide fiber Kevlar (registered trademark) K29 (manufactured by DuPont) 3300 dtex. An example in which a water-dispersible copolymer polyester resin (Bironal MD1200 manufactured by Toyobo Co., Ltd., scratch hardness (pencil method): H, shore hardness 85, tensile elongation 3%) is added to the dry resin amount to 250 g / m ^2. A composite material was produced in the same manner as in 1. Seven pieces of the composite material and eight pieces of DuPont's bulletproof material Kevlar (registered trademark) XP103 were laminated and packed in the same manner as in Example 1 to prepare a protective article. As a result of evaluating the blade resistance and elasticity by using the surface to which the impact is applied as a composite material laminated surface, the elasticity was 〇 and the blade resistance was ⊚, as shown in Table 1.

<Example 6>
A plain woven fabric having a density of 32 × 32 lines / inch (2.54 cm) and a basis weight of 110 g / m ² was prepared using 440 dtex of aromatic polyamide fiber Kevlar (registered trademark) K29 (manufactured by DuPont). A polyester resin (Bironal MD1200 manufactured by Toyobo Co., Ltd., scratch hardness (pencil method): H, shore hardness 85, tensile elongation 3%) is added thereto so that the amount of resin after drying is 42 g / m ² as in Example 1. Was produced. Twenty-five pieces of the composite material and nine pieces of DuPont's bulletproof material Kevlar (registered trademark) XP103 were laminated and packed in the same manner as in Example 1 to prepare a protective article. As a result of evaluating the blade resistance and elasticity by using the surface to which the impact is applied as a composite material laminated surface, the elasticity was 〇 and the blade resistance was ⊚, as shown in Table 1.

<Example 7>
Amount of resin after drying a solution of a water-dispersible copolymer polyester resin (Byronal MD1245 manufactured by Toyobo Co., Ltd., scratch hardness (pencil method): H, shore hardness 85, tensile elongation 5%) on the plain fabric prepared in Example 1. A composite material was prepared so as to be 41 g / m ² . 16 sheets of the composite material and 9 sheets of the bulletproof material Kevlar (registered trademark) XP103 manufactured by DuPont were laminated in this order and packed in the same manner as in Example 1 to prepare a protective article. As a result of evaluating the blade resistance and elasticity by using the surface to which the impact is applied as the composite material laminated surface, both were 0 as shown in Table 1.

<Comparative example 1>
A solution of a water-dispersible amorphous saturated copolymer resin (plus coat "Z-565" manufactured by Mutual Chemicals Co., Ltd.) is added to a 3300 dtex plain woven fabric prepared in Example 5 to obtain a resin amount of 24 g / m ² after drying. I made a composite material. Six of the composite materials and seven of DuPont's bulletproof material Kevlar (registered trademark) XP103 were laminated and packed in the same manner as in Example 1 to prepare a protective article. As a result of evaluating the blade resistance and elasticity with the surface to which the impact is applied as the XP laminated surface, as shown in Table 1, the elasticity was 〇 but the blade resistance was ×.

<Comparative example 2>
A composite material was prepared by adding a solution of an amorphous saturated copolymer resin (plus coat "Z-565" manufactured by Mutual Chemicals Co., Ltd.) to the plain woven fabric prepared in Example 1 so that the amount of resin after drying was 5 g / m ² . .. Thirty-five pieces of the composite material were laminated and packed in the same manner as in Example 1 to prepare a protective article. As a result of evaluating the blade resistance and elasticity, both were x as shown in Table 1.

<Comparative example 3>
A solution of an amorphous saturated copolymer resin (plus coat "Z-880" manufactured by Reciprocal Chemical Co., Ltd., scratch hardness (pencil method): B, shore hardness 50, tensile elongation 1000%) on the plain fabric prepared in Example 1. A composite material was prepared so that the amount of resin after drying was 45 g / m ² . 16 sheets of the composite material and 7 sheets of the bulletproof material Kevlar (registered trademark) XP103 manufactured by DuPont were laminated and packed in the same manner as in Example 1 to prepare a protective article. As a result of evaluating the blade resistance and elasticity with the surface to which the impact is applied as the composite material surface, as shown in Table 1, the elasticity was 〇 but the blade resistance was ×.

<Comparative example 4>
A composite material was prepared by adding a solution of an amorphous saturated copolymer resin (plus coat "Z-880" manufactured by Mutual Chemicals Co., Ltd.) to the plain woven fabric prepared in Example 1 so that the resin amount after drying was 35 g / m ² . .. Thirty-five pieces of the composite material were laminated and packed in the same manner as in Example 1 to prepare a protective article. As a result of evaluating the blade resistance and elasticity, as shown in Table 1, the blade resistance was 〇, but the elasticity was ×.

The composite material according to the present invention can be used not only for bulletproof blade-proof protective clothing worn by police officers, guards, etc. as described above, but also for armor applications such as vehicles and ships. Since the armor is less likely to be deformed when landing, it is possible to protect power equipment and communication equipment from damage.

1 Composite material 2 Fabric 3 Resin layer 4 Laminated body 5 Tape fastening point 6 Protective article 7 Film 8 Welded part

Claims (12)

A composite material having a fabric and a layer of resin applied to at least one side of the fabric, the resin having a scratch hardness (pencil method) of H or more according to JIS K5600-5-4 and conforming to JIS K7127. A composite material having a tensile elongation of 10% or less and a tensile strength of the composite material of 30 N / mm ² or more. The amount of the resin in the composite material is in the range of 5 to 40% by weight with respect to the total amount of the cloth and the resin, and the texture of the cloth per composite material is 550 g / m ² or less. The composite material according to claim 1. The composite material according to claim 1 or 2, wherein a high-strength fiber having a tensile strength of 17 cN / dtex or more is used as the fiber constituting the fabric. The resin is a thermoplastic resin having a shore hardness (type D) of 60 or more, which contains at least one of a polyester resin, a polyurethane resin, an acrylic resin, a polycarbonate resin, a polystyrene resin, and a fluorine resin. The composite material according to any one of claims 1 to 3. Any of claims 1 to 4, wherein the fabric is a woven fabric or a knitted fabric, a uniaxial structure in which fibers are aligned in a uniaxial direction, or a multiaxial structure in which the aligned fibers are laminated at a plurality of angles. Composite material described in. The composite material according to any one of claims 1 to 5, wherein the thickness per sheet is 1 mm or less. The composite material according to any one of claims 1 to 6, wherein the Gale rigidity and softness per sheet is 13 mN or more and 1100 mN or less in both vertical and horizontal directions. A laminated body in which a plurality of layers containing the composite material according to any one of claims 1 to 7 are laminated, and adjacent layers in the stacking direction are 90% or more of the single layer area and are not fixed to each other. A laminated body in which a plurality of layers containing the composite material according to any one of claims 1 to 7 are laminated, and the total weight is 11 kg / m ² or less. A protective article in which the composite material according to any one of claims 1 to 7 or the laminate according to claim 8 or 9 is packed with a film having a thickness of 5 μm or more and 1 mm or less. The protective article according to claim 10, which has a blade resistance that satisfies level 1 of impact energy (E1) at an incident angle of 0 ° according to the criteria specified in NIJ Standard-0115.00. The protective article according to claim 10 or 11, which has elasticity resistance satisfying Level IIIA according to the criteria specified in NIJ Standard-0101.06.

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