Union cloth

Abstract

To provide a woven fabric which is free from a scratchy feeling, has excellent dynamic tear performance, and also has excellent cut resistance.SOLUTION: A union fabric in which a core-sheath spun single yarn, in which a core yarn made of an inorganic fiber is covered with an organic fiber staple fiber, and a spun yarn made of at least one kind of organic fiber are arranged as warp and weft yarns, respectively, the union fabric having a thickness of 0.3 to 0.8 mm.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to an interwoven fabric having high resistance to dynamic tearing.

Background Art

[0002] Work clothes and uniforms play a role in protecting the operator's body from various risks such as fire, heat, knives, nails, etc. Protective materials such as gloves, arm covers, and aprons made of high-strength organic fibers such as aramid fibers are extremely high in cut resistance compared to conventional protective materials using cotton or the like because the fibers are difficult to be cut by a knife. Therefore, they have been widely used to protect the hands and bodies of workers in operations where cut accidents are likely to occur, such as operations involving handling sheet metal products with burrs, operations involving handling easily breakable glass products, and garbage collection operations involving handling general dust that may contain metal pieces or glass pieces.

[0003] Examples of blade-proof protective materials include a combined yarn of stainless steel and aramid fiber, a covering yarn obtained by covering stainless steel long fibers with aramid fiber, or a core-sheath composite yarn having a core / sheath yarn mixing ratio of 10 / 90 to 80 / 20, such as a core-sheath yarn obtained by covering annealed steel fibers with aramid short fiber bundles (Patent Document 1, etc.). It is disclosed that when the core-sheath composite yarn is woven into a fabric, good results are obtained in terms of cut resistance and puncture resistance when used as a laminating material for chest protectors and bulletproof vests.

[0004] Patent Document 2 discloses a protective clothing fabric having ice pick penetration resistance for protecting the human body from risks such as cuts by sharp objects and stabbing by pointed objects, which is formed by laminating two or more layers of a fabric woven with fibers containing tungsten or molybdenum as warp yarns and flexible fibers such as 66 nylon and aramid as weft yarns.

[0005] Patent Document 3 discloses a cut-resistant fabric knitted on a glove knitting machine using a 10 / 2s yarn containing a strand having a sheath made of a spun yarn of a metal fiber core and cut-resistant staple fibers (polyparaphenylene terephthalamide) (metal content 1 to 50% by weight) and a strand of cut-resistant fibers without metal fibers. It is disclosed that increasing the ratio of the steel core in the strand improves the cut resistance of the knitted fabric but deteriorates the comfort, and when the ratio of the steel core is the same, increasing the steel core diameter improves the cut resistance but deteriorates the comfort. That is, it is disclosed that a fabric with a good balance between cut resistance and comfort can be obtained by not exposing the metal fibers and adjusting the ratio of the metal fibers. However, no disclosure is made regarding woven fabrics.

[0006] When the glove catches on a protrusion or obstacle such as a nail, it is common in the work site for the glove to develop holes or tears (Non-Patent Document 1). However, there are few reported examples in the literature regarding the absence of hole formation or tearing (this is referred to as dynamic tear performance), and Patent Documents 4 to 5 only disclose woven and knitted fabrics made of composite yarns using stainless steel fiber filaments for the core yarn and organic fiber filaments for the sheath yarn.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Non-Patent Documents

[0008]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0009] There is a strong demand from workers for a more secure protective material that is excellent in wearing comfort and workability. In operations such as the replacement of sharp cutting tools and the handling of sharp metal or glass plates, higher cut resistance is required. Although cut-resistant fabrics may be used in double or triple layers, using multiple layers reduces work efficiency. Therefore, there is a high demand for a fabric that is thin, has good wearability, and has high cut resistance (the force required to cut through the material using a cutting tool).

[0010] The cutability test method described in ISO 13995 evaluates the resistance of a sample to tearing by tearing the sample (see Figure 1). The sample is attached to a panel with a slit in the center, and a cutting tool is dropped from a height of 700 mm to tear the sample attached to the panel. The resistance of the sample to tearing is determined by the length of the tear. The weights of the cutting tool and the holding block dropped are changed to 250 g, 500 g, 1000 g, and 2000 g, and the function of the fabric is defined by the "performance level" (in the table below) based on the tear length at each weight. A tear performance level of 4 (tear length of 40 mm or less) is the highest level in the JIS T8050 performance level, and the possibility of propagation tearing is very low under any accident situation.

[0011] JPEG2025108969000002.jpg33168

[0012] The cutability test method described in ISO 13997 evaluates the cut resistance against a knife, thin metal plate, glass, etc. (see Figure 2). The sample is attached to a kamaboko-shaped panel, and the force required to cut the sample when the blade pressed on it moves at a constant speed and the moving distance of the blade reaches 20 mm is evaluated as the cutting force. The higher the cut resistance, the stronger the resistance to cutting.

[0013] In view of the background of the prior art, the present invention aims to provide a woven fabric made of short organic fibers, which has excellent dynamic tearing performance and also excellent cut resistance.

Means for Solving the Problems

[0014] In order to solve such problems, the present invention adopts the following means.

[0015] That is, the present invention provides an interwoven fabric in which a core-sheath spun yarn single filament obtained by coating the periphery of a core yarn made of inorganic fibers with short organic fibers and a spun yarn made of at least one kind of organic fiber are arranged as warp yarns and weft yarns, respectively, and the thickness of the interwoven fabric is 0.3 to 0.8 mm.

[0016] In the interwoven fabric, the mixing ratio of the organic fiber is preferably 65% by mass or more, and the organic fiber is preferably polyparaphenylene terephthalamide fiber. Further, the mixing ratio of the polyparaphenylene terephthalamide short fibers contained in the short organic fibers is preferably 70% by mass or more. The mixing ratio of the inorganic fibers contained in the interwoven fabric is preferably 35% by mass or less, and the inorganic fiber is preferably a metal fiber. In the interwoven fabric, it is preferable that the core-sheath type spun yarn and the spun yarn are arranged at a ratio of 1:1 both in the warp and weft directions, and more preferably arranged alternately. The interwoven fabric of the present invention is characterized by satisfying the following characteristics (a) and (b). (a) The hook tearing performance level described in ISO13995 when measured with a blade mass of 2000 g and an impact energy of 14 J is 4 (b) The cut resistance described in ISO13997 is 30 N or more

Effects of the Invention

[0017] The interwoven fabric of the present invention is an interwoven fabric in which the warp and weft are respectively arranged with a core-sheath spun yarn single yarn composed of organic staple fibers around inorganic fibers and a spun yarn composed of organic staple fibers, and is excellent in both dynamic tearing performance and cut resistance. Since the interwoven fabric has appropriate stretchability, it has high movement followability during wearing and excellent wearing comfort. Since it is possible to contain cellulose fibers having easy-care properties that can be washed with water at a high mixing ratio, it is possible to provide a fabric having ultraviolet resistance and easy dyeability.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0019] Hereinafter, the interwoven fabric of the present invention, as well as the core-sheath spun yarn and the spun yarn used therein, will be described in detail.

[0020] The interwoven fabric of the present invention is composed of warp and weft made of a core-sheath spun yarn single yarn containing inorganic fibers and organic fibers and an organic fiber spun yarn, and its thickness is 0.3 to 0.8 mm.

[0021] Conventionally, for interwoven fabrics containing inorganic fibers, fabrics woven using synthetic fibers and inorganic fibers (metal wires) for warp and weft are common. For example, in the case of electromagnetic shielding fabric applications, simple interwoven products of metal wires and non-metal fibers with a metal wire composition ratio (number ratio) of 10 to 50% are used. This simple interwoven product is characterized by ensuring electromagnetic shielding performance, good handling properties, and good forming processability. However, on the other hand, since the metal wires are exposed, there is a drawback that the wearing applications are limited, and it is not necessarily excellent in hook tearing properties and cut resistance.

[0022] In order to overcome the above drawbacks, it is necessary to prevent the metal wire from being exposed. However, if the ratio of the metal wire is reduced, it becomes impossible to maintain a high level of cut resistance. Therefore, according to the conventional concept, a woven fabric using a thread in which a metal wire is used as a core thread to prevent the metal wire from being exposed and the core thread is covered and the ratio of metal is adjusted with synthetic fibers can meet the cut resistance requirements, but it was thought to be difficult to achieve both hook tear resistance and cut resistance while taking advantage of the advantages of metal fibers.

[0023] However, the feature of the present invention is that, as mentioned above, the warp and weft yarns are composed of core-sheath spun yarns containing inorganic fibers and spun yarns made of organic fibers. Furthermore, the union fabric satisfies the following properties (a) and (b). If the union fabric does not satisfy either the hook-and-crack performance or the cut resistance of the fabric, there is a possibility that a serious accident may occur due to overconfidence in safety, but by achieving both (a) and (b), a truly safe union fabric can be provided. (a) The ISO 13995 crack resistance level when measured with a blade material weight of 2000g and impact energy of 14J is 4. (b) Cut resistance as specified in ISO13997 is 30N or more

[0024] Generally, fabrics woven with organic fiber spun yarns (two-ply yarns) that do not use inorganic fibers such as metals in the warp and weft have low cut resistance. Since inorganic fibers such as metals are effective in increasing cut resistance, which is an index of how easily a fabric can be cut when hit with a blade, it is conceivable to use core-sheath spun yarns, with inorganic fibers as the core yarn and spun yarn as the sheath yarn, for the warp and / or weft to increase the cut resistance of the fabric. However, even in this case, although the cut resistance of the fabric increases, the hook split performance level does not reach 4.

[0025] However, by using organic fiber spun yarn and core-sheath spun yarn, which uses inorganic fiber as the core and spun yarn as the sheath, as the warp and weft, respectively, or by devising the arrangement of both yarns, the dynamic tear performance and cut resistance of the woven fabric can be improved significantly. The reason for this is not clear, but is presumed to be as follows. A fabric woven with a spun yarn (two-ply yarn) that does not use inorganic fibers such as metals is woven from a short fiber aggregate. Therefore, due to the entanglement effect of the short fiber aggregate, the tensile breaking strength is increased. Furthermore, the snagging performance can be maintained at a high level by improving the snagging performance in proportion to the tensile breaking strength. On the other hand, a core-sheath spun yarn with inorganic fibers as the core yarn and spun yarn as the sheath yarn has a large cut resistance when made into a fabric due to the cut resistance inherent in the inorganic fibers. In a fabric using the spun yarn and the core-sheath spun yarn as warp yarns or weft yarns, not only does the spun yarn contribute to improving the snagging performance and the core-sheath spun yarn contribute to improving the cut resistance, but the spun yarn constituting the sheath of the core-sheath spun yarn also contributes to improving the snagging performance, resulting in a snagging length smaller than expected and exhibiting snagging performance close to that of a single spun yarn fabric. In addition, a fabric woven with a spun yarn (two-ply yarn) that does not use inorganic fibers such as metals is basically woven from a short fiber aggregate, so the cut resistance of the fabric is reduced. On the other hand, a core-sheath spun yarn with inorganic fibers as the core yarn and spun yarn as the sheath yarn has a large cut resistance for the fabric due to the utility of the inorganic fibers. In a fabric using the spun yarn and the core-sheath spun yarn as warp yarns or weft yarns, not only does the inorganic fiber constituting the core of the core-sheath spun yarn contribute to improving the cut resistance, but although the contribution of the spun yarn to improving the cut resistance is smaller than that of the inorganic fiber, spun yarns composed of fibers with cut resistance such as aramid fibers have their own cut resistance, so the fabric exhibits a cut resistance close to that of a single core-sheath spun yarn fabric.

[0026] The above-mentioned (a) snagging performance level "4" of the interwoven fabric of the present invention means that the snagging length described in ISO13995 is 40 mm or less. Materials with a snagging length of 40 mm or less have a very low possibility of showing propagating tear under any accident situation. The above-mentioned (b) cut resistance of 30 N or more means that the cut resistance described in ISO13997 is 30 N or more. Materials with a cut resistance of 30 N or more can sufficiently withstand cutting by a sharp blade. The cut resistance is more preferably 32 N or more, and even more preferably 35 N or more. There is no particular upper limit, but considering the characteristics of the yarn and the weaving structure, 60 N or less is desirable.

[0027] <core-sheath spun yarn> In the core-sheath spun yarn that constitutes the interwoven fabric of the present invention, as the core yarn, inorganic fibers are used from the viewpoint of enhancing the cut resistance of the core-sheath spun yarn. Examples of the inorganic fibers include metal fibers, mineral fibers, glass fibers, and the like. As the inorganic fiber serving as the core yarn, a single filament or multifilament yarn of a filament, or a plurality of such filaments aligned or twisted together can be used. Further, within a range that does not inhibit the above characteristics, those in which an inorganic fiber filament is coated or welded with a resin, rubber, or the like can be used. From the viewpoint of ease of manufacturing the core-sheath spun yarn, it is preferable that the inorganic fiber serving as the core yarn is composed only of an inorganic fiber filament or an inorganic fiber filament coated or welded with a resin or rubber.

[0028] Among the above inorganic fibers, metal fibers are preferable in terms of excellent cut resistance, particularly cut resistance against sharp edges such as thin metal plates and parts, glass plates, knives, and cutting tools, and the ability to be used as thin wires. Examples of the metal constituting the metal fiber include stainless steel (e.g., SUS304, SUS316), tungsten, copper, aluminum, and the like. Among these metal fibers, from the viewpoints of good rust resistance, tensile properties, and weaving properties, fibers of stainless steel or tungsten steel are preferable, and stainless steel fibers are particularly preferable. Further, the diameter of the metal fiber is preferably 15 μm to 100 μm. If the diameter is 15 μm or more, the cut resistance of the interwoven fabric becomes sufficient. On the other hand, if the diameter is 100 μm or less, the weaving property of the yarn and the comfort of the interwoven fabric are not significantly deteriorated. The diameter of the metal fiber is more preferably 20 μm to 70 μm, and even more preferably 20 μm to 60 μm.

[0029] In the core-sheath spun yarn single filament in which the periphery of the core yarn made of inorganic fiber is coated with organic fiber short fibers, the ratio of the core yarn is preferably 20 to 45% by mass. When the core yarn is 20% by mass or more, it becomes easier to ensure the cut resistance of the interwoven fabric. When the core yarn is 45% by mass or less, it is possible to prevent insufficient snagging performance due to a decrease in the proportion of the organic short fibers constituting the sheath yarn. More preferably, it is 25 to 45% by mass, and even more preferably 30 to 43% by mass.

[0030] In the core-sheath spun yarn that constitutes the interwoven fabric of the present invention, organic fibers are used as the covering yarn (which may also be referred to as the "sheath yarn"). By using organic fibers, the dyeability of the core-sheath spun yarn is improved, and the woven fabric has excellent comfort, texture, and weather resistance, enabling it to be developed for a wide variety of applications. Examples of organic fibers include high-strength organic fibers, synthetic fibers, semi-synthetic fibers, and natural fibers, and one or more of these organic fibers can be selected and used.

[0031] Here, the high-strength organic fiber refers to an organic fiber having a tensile strength of 17.5 cN / dtex or more measured in accordance with JIS L 1013 8.5. When the tensile strength is 17.5 cN / dtex or more, the spun yarn is imparted with flex resistance and abrasion resistance, making it easier for the interwoven fabric to reach a predetermined level of snagging performance and cut resistance. The preferred tensile strength is 17.5 to 35 cN / dtex. Specific examples of the high-strength organic fiber include, for example, aramid fiber, wholly aromatic polyester fiber, polyparaphenylene benzobisoxazole fiber, polybenzimidazole fiber, polyamideimide fiber, ultra-high molecular weight polyethylene fiber, etc. Among these high-strength organic fibers, aramid fiber, wholly aromatic polyester fiber, and ultra-high molecular weight polyethylene fiber are preferred from the viewpoint of excellent cut resistance, and aramid fiber is particularly preferred. Among aramid fibers, para-aramid fibers are preferred because the raw yarn has high strength and high elastic modulus and is excellent in cut resistance and heat resistance. For example, polyparaphenylene terephthalamide fiber (manufactured by Toray DuPont Co., Ltd., trade name "Kevlar (R)"), polyparaphenylene terephthalamide fiber (manufactured by Teijin Ltd., trade name "Twaron (R)"), and copolyparaphenylene-3,4'-diphenyl ether terephthalamide fiber (manufactured by Teijin Ltd., trade name "Technora (R)") and the like can be mentioned. In addition, para-aramid fibers can be those manufactured by known or equivalent methods, or the above-mentioned commercial products can also be used.

[0032] From the perspective that the high-strength organic fiber is excellent in covering property and twistability with respect to the core yarn, has a soft texture when woven, and is further excellent in flexibility, short fibers having crimps obtained by staple processing of high-strength organic fiber filaments are preferred over the raw yarn.

[0033] Examples of organic fibers other than high-strength organic fibers include synthetic fibers, semi-synthetic fibers, and natural fibers. These organic fibers are fibers having a tensile strength of less than 17.5 cN / dtex measured in accordance with JIS L 1013 8.5, and hereinafter, these organic fibers are referred to as "non-high-strength organic fibers". Specific examples of non-high-strength organic fibers include, for example, polyester (such as polyethylene terephthalate, polyethylene naphthalate, wholly aromatic polyester, etc.) fibers, nylon (such as nylon 6, nylon 66, etc.) fibers, rayon fibers, acrylic fibers, polyethylene fibers, polyether sulfide (PPS) fibers, polyimide (PI) fibers, polybenzimidazole (PBI) fibers, polyether imide (PEI) fibers, meta-aramid fibers and other synthetic fibers; natural fibers such as cotton, hemp, wool, etc.; flame-retardant fibers such as flame-retardant acrylic (modacrylic) fibers, polyvinyl chloride fibers, flame-retardant polyester fibers, flame-retardant rayon fibers, flame-retardant vinylon fibers, flame-retardant wool fibers, flame-retardant cotton fibers, heat-resistant fibers, etc. All of these non-high-strength organic fibers have a tensile strength of 10 cN / dtex or less.

[0034] Among the above non-high-strength organic fibers, from the perspective of being able to improve the tensile strength, cut resistance, heat resistance, abrasion resistance, etc. of the spun yarn, short fibers of acrylic fibers, nylon fibers, polyester fibers, rayon fibers, and short fibers of flame-retardant fibers obtained by subjecting these synthetic fibers to flame-retardant processing or the like are preferred. From the perspective of excellent ultraviolet resistance, cotton fibers and flame-retardant cotton fibers are preferred.

[0035] Composite of high-strength organic staple fibers and non-high-strength organic staple fibers can increase the elongation rate of the fabric, improve the wearing comfort, and further improve the texture, without significantly reducing the cut resistance of the fabric. In addition, by compounding non-high-strength organic staple fibers, for example, in the case of cotton, the hygroscopicity and ultraviolet resistance of the fabric can be improved.

[0036] The mixing ratio of high-strength organic staple fibers contained in the organic fiber staple fibers constituting the sheath yarn is preferably 40% by mass or more. More preferably, it is 45% by mass or more, and still more preferably, it is 50% by mass or more. By increasing the mixing ratio of high-strength organic staple fibers, it becomes possible to increase the snag length and cut resistance.

[0037] In the present invention, the organic fiber staple fibers used are those produced by known methods, and as long as they can pass through the spinning process, the fineness, fiber length, or the number of crimps in the case of staple processing are not limited. The single fiber fineness of the staple fibers may be appropriately selected according to the application purpose, considering the surface appearance, heat resistance, stretchability, texture, etc. Preferably, it is 0.2 to 6.0 dtex, more preferably 0.5 to 6.0 dtex, and still more preferably 1.0 to 5.0 dtex. The fiber length of the staple fibers is preferably long in order to obtain an interwoven fabric having excellent snagging performance and cut resistance. However, from the viewpoint of processability such as the spinning process, the range of 25 to 160 mm is preferable, and more preferably, the range is 30 to 130 mm. The number of crimps of the staple fibers is not particularly limited, but those having 3 to 12 crests / 25.4 mm are preferable, and more preferably, 5 to 10 crests / 25.4 mm. If the number of crimps is too small, it becomes difficult to obtain a spun yarn with texture and flexibility. On the contrary, if the number of crimps is too large, the strength of the spun yarn tends to decrease due to buckling, rubbing, etc. of the high-strength organic fibers.

[0038] When the staple fiber is cotton fiber, medium-length cotton (fiber length: 26.2 to 27.8 mm) or long-staple cotton (fiber length: 28.6 to 33.3 mm) is used. To improve the quality stability of the blended spun yarn and prevent troubles in the spinning process, it is preferable that the fiber lengths of the staple fibers of the high-strength organic fiber and the natural fiber are as approximate as possible.

[0039] Also, when the staple fiber is composed of a plurality of organic fibers, the single-fiber fineness and fiber length of each staple fiber may be the same or different. In obtaining a core-sheath spun yarn with high tensile strength, a longer fiber length is preferable, but from the viewpoint of processability in the spinning process, it is more preferable that the fiber lengths of both staple fibers are about the same.

[0040] The thickness of the single yarn of the core-sheath spun yarn depends on the application, but is usually preferably used in the range of 40s to 5s count. As the form of the spun yarn arranged around the inorganic fiber (core yarn), a spun yarn or a blended yarn is used. Also, by using the single yarn of the core-sheath spun yarn, it becomes possible to design a count that can sufficiently cover the inorganic fiber to clear the desired fabric thickness and cut resistance performance. Note that the core-sheath spun yarn can be manufactured using a spinning machine that uses a swirling air flow (for example, manufactured by Murata Machinery, Ltd., "MVS (Murata Vortex Spinner)").

[0041] <Spun yarn> The spun yarn made of organic fiber can be manufactured with existing cotton spinning, worsted spinning or woolen spinning equipment. For example, it can be manufactured through each spinning process of carding, drawing, roving, and spinning, and the high-strength organic fiber staple fiber, and further the staple fiber to be mixed with it, can be mixed at a predetermined mixing ratio in, for example, a mixing carding process or a drawing process. The thickness of the spun yarn depends on the application, but is usually preferably used in the range of 40s to 5s count. The form of the spun yarn is a spun yarn double yarn in which two single spun yarns or blended single yarns are aligned and twisted in the opposite direction to the single spun yarn. The count of the spun yarn double yarn is preferably 40 / 2s to 5 / 2s, and the processability is not significantly impaired within the above range. In the case of British cotton count, the yarn with a length of 768.10 m (840 yards) per 453.6 g (1 pound) is called No. 1 count, and as the yarn becomes thinner, the count number becomes larger.

[0042] As the organic fiber, from the viewpoint of mainly imparting cut resistance to the woven fabric, a high-strength organic fiber having a tensile strength of 17.5 cN / dtex or more is preferable. When the tensile strength is 17.5 cN / dtex or more, the spun yarn is imparted with flex resistance and wear resistance, so that the snagging performance and cut resistance of the woven fabric easily reach a predetermined level. The tensile strength is more preferably 17.5 to 35 cN / dtex. Examples of the high-strength organic fiber include aramid fiber, wholly aromatic polyester fiber, polyparaphenylene benzobisoxazole fiber, polybenzimidazole fiber, polyamideimide fiber, ultra-high molecular weight polyethylene fiber, etc. Among these high-strength organic fibers, from the viewpoint of high cut resistance, aramid fiber, wholly aromatic polyester fiber, and ultra-high molecular weight polyethylene fiber are preferable, and aramid fiber is particularly preferable. These high-strength organic fibers can be used alone or in a blended form.

[0043] Among aramid fibers, para-aramid fibers are preferable because the raw yarn has high strength and high elastic modulus and is excellent in cut resistance and heat resistance. Examples include the aforementioned polyparaphenylene terephthalamide fiber and copolyparaphenylene-3,4'-diphenyl ether terephthalamide fiber.

[0044] The organic fiber is used in the form of staple fiber. As long as it can pass through the spinning process, the fineness, fiber length, or the number of crimps in the case of applying crimps is not limited. The fiber length is preferably long in obtaining a woven fabric having excellent snagging performance and cut resistance, but from the viewpoint of processability such as the spinning process, the range of 25 to 160 mm is preferable, and more preferably the range of 30 to 130 mm. The number of crimps is not particularly limited, but those having 3 to 12 crests / 25.4 mm are preferred, and more preferably 5 to 10 crests / 25.4 mm. If the number of crimps is too small, it becomes difficult to obtain a spun yarn with a texture and flexibility. On the contrary, if the number of crimps is too large, the strength of the spun yarn tends to decrease due to buckling, rubbing, etc. of the high-strength organic fiber.

[0045] The mixing ratio of the high-strength organic fiber staple fibers in the spun yarn is not limited as long as the woven fabric has a desired cut resistance. Preferably it is 70% by mass or more, more preferably 80% by mass or more, still more preferably 90% by mass or more, and particularly preferably 100% by mass. In the high-strength organic fiber staple fibers, short fibers such as polyester fibers, nylon fibers, rayon fibers, and meta-aramid fibers may be mixed as long as the effects of the present invention are not impaired.

[0046] <Woven fabric> In the woven fabric of the present invention, from the viewpoints of obtaining the above (a) hook tearing performance and (b) cut resistance, the mixing ratio of the inorganic fiber is preferably 35% by mass or less, more preferably 10 to 35% by mass, based on the fabric mass. When the ratio of the inorganic fiber is 35% by mass or less, the comfort of the woven fabric is not significantly reduced. Also, when the ratio of the inorganic fiber is 10% by mass or more, the cut resistance of the woven fabric can be ensured. The ratio of the inorganic fiber in the woven fabric is more preferably 15 to 30% by mass, and still more preferably 15 to 25% by mass.

[0047] In the woven fabric of the present invention, there is no upper limit to the mixing ratio of the high-strength organic fiber mixed as the organic fiber, and all the organic fibers may be composed of high-strength organic fibers. High-strength organic fibers have the effect of improving the cut resistance and hook tearing performance of the woven fabric. On the other hand, non-high-strength organic fibers slightly reduce the above-mentioned performance of the woven fabric, but have the effect of improving ultraviolet resistance, dyeability, etc. Among the high-strength organic fibers, aramid fibers, wholly aromatic polyester fibers, and ultra-high molecular weight polyethylene fibers are preferred in terms of excellent cut resistance. Aramid fibers are more preferred, and polyparaphenylene terephthalamide fibers are particularly preferred.

[0048] When blending organic fibers, the blending ratio of high-strength organic fibers is preferably 65% by mass or more, more preferably 65% by mass or more and 85% by mass or less, based on the total amount of organic fibers. By setting the blending ratio to 65% by mass or more, it becomes easier to ensure the desired cut resistance while ensuring the snagging performance of the woven fabric. The blending ratio of the organic fibers contained in the fabric is more preferably 70% by mass or more, and even more preferably 75% by mass or more. Within a range that does not impair the effects of the present invention, other known organic fibers such as polyester fibers, nylon fibers, cotton, and polyvinyl alcohol-based fibers can be interwoven to form a fabric.

[0049] Also, the warp and weft yarns may have different fiber compositions, but it is preferable that the blending ratio of the inorganic fibers and the blending ratio of the high-strength organic fibers are made the same. This is because when the blending ratio of the high-strength organic fibers contained in either one or both of the warp and weft yarns is low, snagging tends to occur starting from the yarn with the lower blending ratio, resulting in an increase in the snagging length.

[0050] In addition, in the fabric of the present invention, when the core-sheath spun yarn single yarn and the spun yarn are used as the warp and weft yarns, respectively, the arrangement method is not particularly limited. Using the core-sheath spun yarn single yarn also has the advantage of shortening the fabric manufacturing process and reducing costs. The spun yarn is processed into a fabric by arranging single yarns or double yarns as the warp and weft yarns according to the intended use.

[0051] The core-sheath spun yarn single filaments and the spun yarns can be used as the warp and weft yarns of the interwoven fabric as long as the desired fabric properties can be obtained. In the warp and weft yarns, the mixing ratio of the core-sheath spun yarn single filaments and the spun yarns is preferably in the range of 2:8 to 8:2 (mass ratio), more preferably in the range of 3:7 to 7:3, and particularly preferably arranged alternately at a ratio of 5:5 (1:1). When the mixing ratio of the core-sheath spun yarn is increased, the cut resistance of the interwoven fabric is satisfied, but the snag length tends to be insufficient. When the mixing ratio of the spun yarn is increased, the snag length of the interwoven fabric is satisfied, but the cut resistance tends to be insufficient. The mixing ratio of the core-sheath spun yarn and the spun yarn is preferably the same in any part of the warp and weft, but is not limited thereto. The mixing ratio here is calculated as the ratio of the number of each fiber yarn to the total number of yarns when a 10 cm square base fabric is sampled.

[0052] In the present invention, as the loom to be manufactured, a common loom can be used, but weaving in a water jet loom or an air jet loom is preferable in terms of productivity and quality. In addition, in order to alternately insert two types of yarns in the weft direction, for example, it can also be made using a so-called two-nozzle loom having two weft yarn flying nozzles.

[0053] The weave may be any weave such as plain weave, twill weave, satin weave, or fancy weave. However, twill weave (including twill deformed weave) is preferable in that the fabric is easy to stretch and can ensure a certain degree of elongation rate. By increasing the number of floats in the fabric weave, the fabric becomes a stretchy fabric. If the number of floats is increased too much, the cut resistance of the fabric decreases, or the tendency to cause misalignment becomes strong. Therefore, the maximum number of floats in the complete weave of the fabric is preferably about 1 float, 2 floats, or 3 floats. That is, as the fabric weave, twill weave (1 float), 2 / 1 twill (2 floats), 2 / 2 twill (2 floats), etc. are desirable, but it is not limited thereto as long as it is selected according to the application. The fabric density is preferably determined by the fineness of the warp and weft yarns, the fabric weave, and the areal density. The fabric weave when weaving into the fabric can be selected according to the desired performance, texture, application, design, etc.

[0054] The areal density of the interwoven fabric of the present invention is not particularly limited. 300 g / m 2 The following is preferable. In the case of a fabric exceeding 300 g / m 2 the snagging resistance and cut resistance of the fabric are sufficient, but the flexibility of the fabric tends to be insufficient. A more preferable areal density is 200 to 300 g / m 2 and particularly preferably 220 to 300 g / m 2 By increasing the areal density, the snagging resistance and cut resistance of the fabric are improved. Also, the interwoven fabric preferably has a thickness of 0.8 mm or less from the viewpoints of processability into protective products and improved comfort. There is no particular lower limit for the thickness of the interwoven fabric. However, when the thickness is 0.3 mm or more, a fabric having the above (a) snagging resistance and (b) cut resistance is easily obtained. The thickness of the interwoven fabric is more preferably 0.3 to 0.7 mm, and even more preferably 0.4 to 0.6 mm. The interwoven fabric of the present invention can also obtain the desired (a) snagging resistance and (b) cut resistance by adjusting the thickness (areal density) of the interwoven fabric.

[0055] Furthermore, the interwoven fabric of the present invention may be entirely composed of the core-sheath spun yarn of the present invention and the drawn-in yarn of the spun yarn, or may be partially used. For example, the fabric of the present invention can be used in specific parts such as the front body and only the arms of work clothes. Also, the fabric can be resin-coated as needed.

Examples

[0056] Next, the present invention will be described more specifically using examples and comparative examples, but the present invention is not limited to only the following examples. The evaluation methods for each physical property, etc. were based on the following methods.

[0057] [Yarn fineness] The fineness of the core-sheath composite yarn was determined by the method 8.3 B method (simplified method) of JIS L 1013:2010 Test method for chemical fiber filament yarns. F0 = 1000×m / L×(100 + R0) / 100 (F0: Positive linear density (tex), m: oven-dry weight of the sample (g), L: length of the sample (m), R0: Process moisture content (%) specified in 4.1 of JIS L 0105) The count was converted from the above positive linear density.

[0058] [Thickness of the fabric] Determined by Method A (JIS method) in JIS L1096:2010 8.4.

[0059] [Hook tear test] Complied with ISO13995 (JIS T8050:2005) Protective clothing - Mechanical properties - Test method for resistance to piercing and dynamic tear of materials).

[0060] [Cut resistance] Complied with ISO13997 (JIS T8052:2005) Protective clothing - Mechanical properties - Test method for cut resistance against sharp objects).

[0061] (Fabric constituent yarn) The following spun yarns were used. Also, the fineness and yarn mixing ratio of the spun yarns are shown in Table 1.

[0062] (1) Aramid spun yarn; Kevlar® staple fiber (fiber length: 51 mm) was used. (2) Aramid-cotton blended metal-core sheath spun yarn; A material obtained by winding a blended spun yarn (Kevlar® / cotton = 40 / 22 (mass ratio)) composed of Kevlar® staple fiber (fiber length: 38 mm) and medium-length cotton around a metal fiber (stainless steel SUS316) with a diameter of 60 μm was used. (3) Aramid metal-core sheath spun yarn; A material obtained by winding a spun yarn composed of Kevlar® staple fiber (fiber length: 38 mm) around the above-mentioned metal fiber with the specified diameter was used.

[0063]

Table 1

[0064] (Comparative Example 1) Using aramid spun yarn (20 / 2s) for the warp yarns and the weft yarns, a 2 / 2 twill weave was woven on a rapier loom to obtain a fabric with a woven width of 150 cm.

[0065] (Comparative Example 2) Using aramid spun yarn (20 / 2s) for the warp yarns and aramid cotton mixed metal core-sheath spun yarn (10S) for the weft yarns, a 2 / 2 twill weave was woven on a rapier loom to obtain a fabric with a woven width of 150 cm.

[0066] (Comparative Example 3) Using aramid cotton mixed metal core-sheath spun yarn (10s) for the warp yarns and the weft yarns, a 2 / 2 twill weave was woven on a rapier loom to obtain a fabric with a woven width of 150 cm.

[0067] (Comparative Example 4) Using aramid metal core-sheath spun yarn (10s) for the warp yarns and the weft yarns, a 2 / 2 twill weave was woven on a rapier loom to obtain a fabric with a woven width of 150 cm.

[0068] (Example 1) A 2 / 2 twill weave was woven on a rapier loom. For the warp yarns and the weft yarns, aramid spun yarn (20s / 2s) and aramid cotton mixed metal core-sheath spun yarn (10s) were used and woven so as to be alternately arranged in a 1:1 ratio in both the warp and weft directions.

[0069] (Example 2) A 2 / 2 twill weave was woven on a rapier loom. For the warp yarns and the weft yarns, aramid spun yarn (20s / 2s) and aramid metal core-sheath spun yarn (10s) were used and woven so as to be alternately arranged in a 1:1 ratio in both the warp and weft directions.

[0070] The properties of the fabrics obtained in Comparative Examples 1 to 4 and Examples 1 to 2 are summarized in Table 2.

[0071]

Table 2

[0072] The fabric of Comparative Example 1 woven using aramid spun yarns for the warp and weft yarns reached a level 4 in snagging performance, but the cut resistance was far from the level of the present invention. The fabric of Comparative Example 2 woven using aramid spun yarns for the warp and metal core-sheath spun yarns for the weft had a cut resistance of 30 N or more, but the snagging length in the warp direction was large.

[0073] The fabric of Comparative Example 3 woven using aramid cotton mixed metal core-sheath spun yarns for the warp and weft yarns had insufficient snagging performance in both the warp and weft directions. In Comparative Example 4, aramid metal core-sheath spun yarns were used for the warp and weft yarns. In both Comparative Examples 3 and 4, the cut resistance was 30 N or more, but the snagging length was insufficient.

[0074] From Comparative Examples 1 to 4, in core-sheath spun yarns with a metal as the core yarn and aramid spun yarns as the sheath yarns, a fabric that satisfies both snagging performance and cut resistance has not been obtained.

[0075] On the other hand, in the interwoven fabric of the present invention example using metal core-sheath spun yarns and aramid spun yarns (the spun yarn is composed of only aramid fibers, or cotton is used for 1 / 3 of the whole spun yarn) for the warp and weft yarns, the snagging performance and cut resistance have reached the target levels.

[0076] Regarding the fabric of Comparative Example 1 using aramid spun yarns (20 count / 2s) for the warp and weft yarns, the fabric of Comparative Example 4 using aramid metal core-sheath spun yarns (10s), and the fabric of Example 2 using the aligned yarns of the aramid spun yarns and aramid metal core-sheath spun yarns, the results of comparing the snagging length and cut resistance are shown in FIGS. 3 to 4. From FIGS. 3 and 4, it can be seen that by using the aligned yarns of the present invention, a synergistic effect is recognized in terms of snagging length and cut resistance.

Industrial Applicability

[0077] The interwoven fabric of the present invention is excellent not only in snagging performance and cut resistance but also in stretchability, tensile strength, and texture, and thus can be suitably used for woven products that require comfort and safety.

Claims

1. A woven fabric in which a core-sheath spun yarn single filament, having a core yarn made of inorganic fibers coated with short organic fibers, and a spun yarn made of at least one organic fiber are arranged as warp yarns and weft yarns respectively, and the thickness of the woven fabric is 0.3 to 0.8 mm.

2. The woven fabric according to Claim 1, wherein the mixing ratio of the organic fibers contained in the woven fabric is 65% by mass or more.

3. The woven fabric according to Claim 1 or 2, wherein the organic fiber is a polyparaphenylene terephthalamide fiber.

4. The woven fabric according to Claim 1 or 2, wherein the mixing ratio of the polyparaphenylene terephthalamide short fibers contained in the short organic fibers is 70% by mass or more.

5. The woven fabric according to Claim 1, wherein the mixing ratio of the inorganic fibers contained in the woven fabric is 35% by mass or less.

6. The woven fabric according to Claim 1 or 5, wherein the inorganic fiber is a metal fiber.

7. The woven fabric according to Claim 1, wherein the core-sheath spun yarn single filament and the spun yarn are arranged in a 1:1 ratio both in the warp and weft directions.

8. The woven fabric according to Claim 1, which satisfies the following characteristics (a) and (b). (a) The hook tear performance level described in ISO 13995, when measured with a blade mass of 2000 g and an impact energy of 14 J, is 4. (b) The cut resistance described in ISO 13997 is 30 N or more.

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