JP2018123443A - Fabric and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a leather-like fabric made of ultra fine fiber and elastomer, having a texture of natural nubuck leather, a raised nap feel of suede leather, air permeability, and a matte appearance with a reduced gloss.SOLUTION: A leather-like fabric is a fiber structure comprising ultra fine fiber having an average single fiber fineness of 0.0001 to 0.5 dtex. At least a surface of the fiber structure includes raised nap. On the raised-nap surface, two or more layers of non-yellowing polyurethane are discontinuously provided. The glossiness of the surface is 20% or less. The resin layer has a 3-layer structure including an adhesive layer, an intermediate layer and a surface layer. The total thickness of the resin layer is preferably 0.001 to 0.400 mm.SELECTED DRAWING: None

Description

  The present invention relates to a fabric having a matte appearance that has the feel of natural nubuck leather, the nap feeling and breathability of suede leather, and further suppresses gloss, and a method for producing the same.

  A suede-like artificial leather made of ultrafine fibers and a polymer elastic body has excellent properties not found in natural leather in terms of durability and uniformity. Taking advantage of these features, suede-like artificial leather has been used in a wide range of applications such as clothing, furniture, and automotive interior materials. In recent years, further diversification needs have arisen, and the development of artificial leather having a quality other than suede is desired.

  Examples thereof include artificial leathers such as silvered tones and nubuck tones. Unlike natural suede, natural nubuck leather is obtained by raising the leather's silver surface. For this reason, there is a feature that it has a wet tactile sensation while having a fine surface and flatness like a leather with silver. However, none of the existing artificial leather or synthetic leather imitating nubuck has achieved functions such as air permeability. Further, in terms of appearance, there was no glossy appearance with a matte appearance with a strong glossiness on the surface.

  For nubuck-like artificial leather, for example, after applying a resin liquid to the raised surface of a leather-like sheet made of ultrafine fibers, the applied resin is further divided chemically and / or mechanically, A method for exposing fibers has been proposed (see Patent Document 1). However, in the proposed method, the damage of the resin layer portion after the division is large, and the subsequent wear resistance is a problem.

  Moreover, as a thing excellent in abrasion resistance, the method of printing a leather pattern with a polyurethane resin further on the surface of the polyurethane resin surface-polished on the base-material surface is proposed (refer patent document 2). However, in this proposed method, not only napped fibers are not present on the surface, but also the air permeability is inferior, and the quality and comfort are problems.

  In addition, for artificial leather with a silver tone, a sheet for leather having a silver surface portion consisting of a clothing layer, a surface layer made of a modified hollow nanosilica particle and a polymer elastic body on the equipment (Patent Document) 3) and synthetic leather in which a two-layer polyurethane adhesive layer is laminated on the surface of a fiber base material (see Patent Document 4) has been proposed. However, in any of these proposals, there are no napped fibers on the surface, so there is no lighting effect due to the short napping peculiar to nubuck leather, and since it has a strong gloss feeling, it has a luxurious matte surface feeling. Furthermore, it was inferior in breathability, and the quality and comfort were problems.

Japanese Patent No. 3409554 Japanese Patent No. 5415195 Japanese Patent No. 5454477 Japanese Patent No. 3133957

  Accordingly, an object of the present invention is a synthetic leather made of ultrafine fibers and a polymer elastic body, which has a matte appearance with a natural nubuck leather feel, a raised nap feeling and breathability of a suede leather, and a reduced glossiness. It is providing the fabric which has, and its manufacturing method.

  The leather-like fabric of the present invention has been achieved as a result of intensive studies to achieve the above-described problems, and has the following configuration.

  That is, the leather-like fabric of the present invention is a fiber structure comprising ultrafine fibers having an average single fiber fineness of 0.0001 dtex or more and 0.5 dtex or less, and at least one surface of the fiber structure is raised. The resin layer is intermittently formed on the raised surface, and the resin layer is made of two or more non-yellowing polyurethanes, and the glossiness of the surface is 20% or less. It is the cloth to do.

  Here, the intermittent resin layer means that the resin layer formed on the fabric surface is intermittently arranged on the surface, that is, the resin portion and the napped portion on the fabric of the present invention. Are intermittently arranged, and the surface layer state where napped portions exist between the resin portions scattered in islands, or the resin portion between napped portions scattered in islands Refers to the state of the surface layer where there is.

  Moreover, it is preferable that the ratio (area) to the fabric surface of an intermittent resin part is 10 to 90%, More preferably, it is 20 to 80%. When the ratio of the intermittent resin part is less than 10%, not only is the abrasion resistance inferior, but it is difficult to obtain a nubuck-like surface feeling and touch, while the ratio of the intermittent resin part is 90%. When it exceeds, suede-like air permeability is lost and it becomes difficult to obtain a feeling of napping.

  The non-yellowing polyurethane referred to here is synthesized from a polyisocyanate that does not yellow due to a quinoneimide bond caused by ultraviolet rays or radicals from the outside, i.e., has no aromatic urethane bond. Say something like polyurethane.

  According to a preferred aspect of the fabric of the present invention, the resin layer has a three-layer structure of an adhesive layer, an intermediate layer, and a surface layer.

  Moreover, according to the preferable aspect of the fabric of this invention, the total thickness of the said resin layer is 0.001-0.400 mm.

According to a preferred aspect of the fabric of the present invention, in the breathability evaluation of the fabric, the breathability according to the fragile method of JIS L 1096 8.26.1 is 1.0 cm ³ / cm ² · s or more.

  ADVANTAGE OF THE INVENTION According to this invention, the fabric which has the matte appearance which suppressed the glossiness further while having the touch feeling close | similar to natural nubuck leather, the nap feeling of a suede leather, and air permeability.

  The fabric of the present invention is a fiber structure comprising ultrafine fibers having an average single fiber fineness of 0.0001 dtex or more and 0.5 dtex or less, and at least one surface of the fiber structure is raised, An intermittent resin layer is formed on the raised surface, and the resin layer is composed of two or more non-yellowing polyurethane resin layers.

  Thus, the leather-like fabric of the present invention contains ultrafine fibers having an average single fiber fineness of 0.0001 dtex or more and 0.5 dtex or less. The single fiber fineness of the ultrafine fiber is preferably 0.001 dtex or more and 0.3 dtex or less.

  If the single fiber fineness is less than 0.0001 dtex, the strength of the leather-like fabric decreases. On the other hand, if the single fiber fineness exceeds 0.5 dtex, the texture becomes hard, and it becomes difficult to form delicate napping, so that the surface quality is deteriorated. There is also a problem that the wear resistance is lowered due to insufficient bonding.

  In the present invention, the single fiber fineness is 100 fibers after randomly selecting 100 fiber cross sections and measuring the cross-sectional area of fibers existing on the surface of the fabric or a layer in which ultrafine fibers and polymer elastic bodies are mixed. The fiber cross-sectional area is obtained, and the value obtained by calculating the fineness from the specific gravity of the fiber is used. The value calculated | required according to JISL1015 8.14.2 (1999) is used for the specific gravity of a fiber here.

  The fiber structure used in the present invention may be any of woven fabrics, knitted fabrics and nonwoven fabrics, and artificial leather in which these structures are filled with a polymer elastic body, and the cost required for each use and purpose. It is a preferable aspect to properly use them according to the characteristics. Woven fabrics and knitted fabrics are preferably used in terms of cost, and non-woven fabrics and artificial leathers are preferably used in terms of quality due to a solid texture and fine napping.

  Examples of the fabric used in the present invention include plain weave, twill weave, satin weave, and various fabrics based on these weave structures. As the knitted fabric, any of a knitted fabric represented by warp knitting, weft knitting represented by tricot knitting, lace knitting, and various knitted fabrics can be employed.

  In addition, as the nonwoven fabric, all nonwoven fabrics expressed in various categories such as general short fiber nonwoven fabrics and long fiber nonwoven fabrics, needle punch nonwoven fabrics, papermaking nonwoven fabrics, spunbond nonwoven fabrics, melt blown nonwoven fabrics, and electrospinning nonwoven fabrics should be applied. Can do. Here, non-woven fabrics are preferably used in terms of a solid texture and quality due to fine napping, but artificial leathers in which these structures are filled with a polymer elastic body are used for the durability of the fabric and the fabric. It is more preferably used in terms of excellent surface wear resistance.

  Further, from the viewpoint of excellent mechanical strength, artificial leather preferably includes a reinforcing fabric made of woven or knitted fabric inside the structure, and this woven or knitted fabric is easy to handle and mold. Then, it is a more preferable aspect that it is a woven or knitted fabric composed of fibers having stretch properties.

  Moreover, the fiber structure used in the present invention has at least one surface raised. By having a raised surface, the adhesiveness with the subsequent resin layer is excellent, and furthermore, the surface texture closer to that of genuine leather can be obtained by the raised fiber exposed on the fabric surface.

  In addition, an intermittent resin layer is formed on the raised surface, and the resin layer is composed of two or more layers. This resin layer is preferably a three-layer structure of an adhesive layer, an intermediate layer, and a surface layer.

  First, by intermittently forming the resin layer, sufficient air permeability of the fabric is ensured in the non-resin portion, and when the fabric is bent, the resin layer does not crack and is good. Can maintain a high quality and texture. Furthermore, by having two or more resin layers, it is possible to obtain a leather-like fabric excellent in wear properties, such as an automobile seat and a sofa, which requires more durability. When the resin layer is 1 layer or less, the wearability is inferior.

  The surface resin layer used in the present invention is made of non-yellowing polyurethane. In the case of polyurethanes other than the non-yellowing type, appearance deterioration such as yellowing progresses with time and color changes easily due to the external environment such as light, heat and gas. Further, with a resin other than polyurethane, the texture becomes hard and a high-quality surface feeling cannot be obtained.

  In the present invention, the resin layer preferably has a total thickness of 0.001 to 0.400 mm. When the total thickness is less than 0.001, the wear resistance tends to be inferior, and when the total thickness exceeds 0.400 mm, the texture becomes hard. The total thickness is more preferably in the range of 0.01 to 0.100 mm.

  The thickness of each layer of the resin layer is preferably 0.001 to 0.02 mm for the first layer and the second layer, and preferably 0.008 to 0.06 mm for the third layer. The first layer and the second layer each have a maximum of about 0.065 mm, and the third layer has a maximum of about 0.25 mm.

  Specifically, synthetic fibers made of thermoplastic resins such as polyester, polyamide, polypropylene, and polyethylene are preferably used as the fibers used for the ultrafine fibers and the reinforcing fabric constituting the leather-like fabric of the present invention.

  Next, in the embodiment of the present invention, a case where sea-island fibers are used as the ultrafine fiber generating fibers in the artificial leather as the fabric will be described in detail. The ultrafine fibers constituting the artificial leather used in the present invention can be obtained by using, for example, ultrafine fiber expression type fibers composed of two or more kinds of polymer substances having different solubility in solvents.

  As ultrafine fiber expression type fiber, two-component thermoplastic resins with different solubility in solvent are used as sea component and island component, and the sea component is dissolved and removed using solvent to make island component into ultrafine fiber. It is possible to employ a composite fiber or a peelable composite fiber in which the fiber surface is split into ultrafine fibers by alternately disposing the fiber surface in a radial or multilayered manner and separating it by solvent treatment. . Among them, the sea-island type composite fiber can provide an appropriate gap between the island components by removing the sea component, that is, between the ultrafine fibers inside the fiber bundle, so from the viewpoint of the flexibility and texture of the fiber structure. Are also preferably used.

  For the sea-island type composite fiber, using a sea-island type composite base, a polymer inter-array system in which the sea component and the island component are mutually aligned and spun, and the sea component and the island component are mixed. A mixed spinning method, in which spinning is performed, can be used, but sea-island type composite fibers based on a polymer array system are more preferably used in that ultrafine fibers having a uniform fineness can be obtained.

  The island component of the sea-island type composite fiber, that is, the ultrafine fiber constituting the fiber structure obtained by the method for producing the fiber structure used in the present invention includes polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene 2, Various synthetic fibers made of polyester such as 6-naphthalenedicarboxylate, polyamide such as 6-nylon and 66-nylon, polymers such as acrylic polyethylene and polypropylene, and the like can be used.

  Among these, polyester fibers made of polymers such as polyethylene terephthalate, polybutylene terephthalate, and polytrimethylene terephthalate are preferably used because of their excellent strength, dimensional stability, light resistance, and dyeability. Moreover, unless the objective of this invention is impaired, the fiber structure can mix the ultrafine fiber of a different raw material.

  In the present invention, the polymer that forms the island component includes inorganic particles such as titanium oxide particles, lubricants, pigments, heat stabilizers, ultraviolet absorbers, conductive agents, heat storage agents, antibacterial agents, and the like depending on various purposes. Can be added.

  The cross-sectional shape of the ultrafine fiber may be a round cross-section, but may be a polygonal shape such as an ellipse, a flat shape, or a triangle, or a modified cross-section shape such as a sector shape or a cross shape.

  It is a preferable aspect that the ultrafine fibers are in the form of a nonwoven fabric (ultrafine fiber web) in the fiber structure. By using a nonwoven fabric, a uniform and elegant appearance and texture can be obtained. The form of the nonwoven fabric (extra fine fiber web) may be either a short fiber nonwoven fabric or a long fiber nonwoven fabric, but a short fiber nonwoven fabric is preferably used when emphasis is placed on texture and quality.

  When the short fiber nonwoven fabric is used, the fiber length of the ultrafine fiber is preferably 25 mm or more and 90 mm or less. By setting the fiber length of the ultrafine fiber to 90 mm or less, good quality and texture can be obtained, and by setting the fiber length to 25 mm or more, a fiber structure having good wear resistance can be obtained.

  In the present invention, the obtained ultrafine fiber-generating fiber is preferably crimped and cut into a predetermined length to obtain a nonwoven raw cotton. Although the ultrafine fiber-generating fiber can be used as a long-fiber nonwoven fabric without being cut into a predetermined length, it is preferable to cut into a predetermined length to obtain a short-fiber nonwoven fabric when emphasis is placed on the texture and quality. Similarly, when emphasis is placed on the texture and quality, the fiber length of the short fibers is preferably 25 mm or more and 90 mm or less in consideration of wear resistance due to entanglement.

  A known method can be used for crimping or cutting. The obtained raw cotton can be made into a fiber web by a cross wrapper or the like, and the obtained fiber web can be used for entanglement with a woven or knitted fabric.

  The basis weight of the fiber web can be appropriately set in consideration of the design of the final product, the dimensional change in the subsequent process, the characteristics of the processing machine, and the like.

  In the method for producing artificial leather used in the present invention, a woven / knitted fabric and a fiber entangled body (nonwoven fabric) made of ultrafine fiber-generating fibers are entangled and integrated, and a nonwoven fabric made of ultrafine fiber-generating fibers and a woven / knitted fabric are laminated. Including obtaining a sheet. A method such as needle punching or water jet punching can be used as a method for intertwining both. Among these, the entanglement process by the needle punch is a preferable aspect from the viewpoint of the bonding property and the quality of the product.

  As the woven or knitted fabric, it is preferable to use a woven or knitted fabric having shrinkage. The shrinkage treatment of the woven or knitted fabric may be expressed by any method of heat treatment, chemical or solvent treatment, mechanical treatment, or other treatment methods. The shrinkage treatment of the knitted or knitted fabric is preferably expressed by heat treatment from the viewpoint of productivity.

  The entanglement between the fiber structure (fiber web) made of ultrafine fiber-generating fibers and the woven or knitted fabric is a method of laminating one woven or knitted fabric on the fiber entangled body, a method of sandwiching the fiber entangled body between two woven or knitted fabrics, and woven Although the method of pinching a knitted fabric by two fiber entangled bodies is mentioned, the method of pinching a fiber entangled body by two woven or knitted fabrics is a preferable aspect in terms of workability and efficiency.

  The woven or knitted fabric as a reinforcing fabric constituting the leather-like fabric used in the present invention is laminated and integrated with a fiber entangled body such as a nonwoven fabric made of ultrafine fiber-generating fibers. When the needle punching process is applied as the lamination process, the strength of the artificial leather may be reduced by cutting with a needle depending on the yarn type of the woven or knitted fabric. As a means for suppressing this, the yarn type of the yarn constituting the woven or knitted fabric is preferably a twisted yarn.

  Further, the total fineness of the yarns constituting the woven or knitted fabric (the total fineness in the case of multifilament) is greater than 200 dtex, and the basis weight of the woven or knitted fabric becomes large. Since the knitted fabric has a high rigidity, it is difficult to obtain a satisfactory degree of flexibility as an artificial leather. In addition, the total fineness of the yarns constituting the woven or knitted fabric is preferably 30 dtex or more and 150 dtex or less, more preferably 50 dtex or more and 130 dtex or less, from the viewpoints of rigidity and basis weight.

  Further, the average single fiber fineness of the yarn constituting the woven or knitted fabric used in the present invention may be 1 dtex or more and 10 dtex or less, and ultrafine fibers having a single fiber fineness of 0.001 dtex or more and 1 dtex or less can also be used.

  As the yarn constituting the woven or knitted fabric, synthetic fibers made of polyester, polyamide, polyethylene, polypropylene, or copolymers thereof are preferably used. Among these, synthetic fibers made of polyester, polyamide and copolymers thereof can be used alone or in combination or mixed. In addition, filament yarns, spun yarns, blended yarns of filaments and short fibers, and the like can be used as the yarns constituting the woven or knitted fabric.

  In addition, for the woven or knitted fabric used in the present invention, a composite fiber in which two or more kinds of polymers are combined in a side-by-side type or an eccentric core-sheath type (hereinafter sometimes referred to as “side-by-side type composite fiber”) may be described. A woven or knitted fabric can be used. For example, in a side-by-side type composite fiber composed of two or more types of polymers having a difference in intrinsic viscosity (IV), different internal strains occur between the two components due to stress concentration on the high viscosity side during stretching. Due to this internal strain, the high-viscosity side contracts greatly due to the difference in elastic recovery rate after stretching and the difference in heat shrinkage in the heat treatment process, and strain occurs in the single fiber to express a three-dimensional coil type crimp. This three-dimensional coil-type crimp develops stretchability as artificial leather.

  Examples of the fabric used in the present invention include plain weave, twill weave, satin weave, and various fabrics based on these weave structures. As the knitted fabric, any of a knitted fabric represented by warp knitting, weft knitting represented by tricot knitting, lace knitting, and various knitted fabrics can be employed. Among them, a woven fabric is preferable from the viewpoint of processability, and a plain woven fabric is preferably used particularly in terms of cost. Further, the woven density of the woven fabric can be appropriately set according to the total fineness of the yarn and the equipment and conditions for intertwining the nonwoven fabric and the knitted fabric described later.

  In the present invention, a water-soluble resin can be added to such a woven or knitted fabric as necessary.

  By applying a water-soluble resin to the woven or knitted fabric, the surface of the yarn constituting the woven or knitted fabric is protected by the water-soluble resin, and is directly bonded to the polymer elastic body on the surface of the yarn constituting the woven or knitted fabric. A location will exist intermittently rather than continuously, and an adhesion area can be adjusted moderately. As a result, it is possible to obtain an artificial leather with a soft texture while having strong strength and dimensional stability by appropriate adhesion. In addition, when a woven or knitted fabric made of side-by-side type composite fibers is used, an artificial leather having high stretchability can be obtained.

  As the water-soluble resin, polyvinyl alcohol, polyethylene glycol, saccharides, starch and the like are used. Among them, polyvinyl alcohol having a saponification degree of 80% or more is preferably used.

  Examples of a method for imparting a water-soluble resin to a woven or knitted fabric include a method of impregnating a woven or knitted fabric with an aqueous solution of a water-soluble resin and drying. The water-soluble resin applied to the woven or knitted fabric can be removed with hot water or the like after the application of the polymer elastic body described later.

  In the method for producing artificial leather used in the present invention, a woven or knitted fabric obtained in the above step, and a fiber structure composed of ultrafine fiber generating fibers composed of two or more kinds of polymer substances having different solubility in a solvent; Are entangled and integrated to produce a laminated sheet.

  From the viewpoint of densification, the laminated sheet of fiber entangled body and woven or knitted fabric made of ultrafine fiber-generating fibers obtained in this way is subjected to dry heat or wet heat or both in the stage before applying the polymer elastic body. It is a preferable embodiment that the resin is shrunk and further densified. This shrinkage treatment may be performed before or after the development of the ultrafine fibers. However, since the characteristics of the sea component polymer of the ultrafine fiber-generating fiber can be used for the shrinkage, before the ultrafine fibers are generated. It is a preferable aspect to perform the shrinkage treatment.

  Moreover, it is preferable that the range of the area shrinkage rate of the lamination sheet in this shrinking process is 15% or more and less than 35%. By setting the area shrinkage rate to 15% or more, an effect of improving the quality due to the shrinkage can be preferably obtained. In addition, by setting the area shrinkage rate to less than 35%, it is possible to leave room for shrinkage in the woven or knitted fabric integrated with the nonwoven fabric, so that it is possible to efficiently shrink after the polymer elastic body is applied later. Become. The range of the area shrinkage rate is more preferably 13% or more and less than 30%, and further preferably 15% or more and less than 25%.

  In the method for producing artificial leather as a leather-like fabric used in the present invention, an average single fiber fineness of 0 is obtained by treating a laminated sheet of a fiber entanglement (nonwoven fabric) composed of the above-mentioned ultrafine fiber generating fiber and a woven or knitted fabric. A step of developing 0.01 to 0.50 dtex ultrafine fibers. Examples of the ultrafine fiber generation treatment method include a method in which one of the resins constituting the ultrafine fiber generation type fiber is dissolved with a solvent. In particular, for the ultrafine fiber-generating sea-island composite fiber in which the sea component is made of an easily soluble polymer and the island component is made of a hardly soluble polymer, a method of dissolving the sea component is preferable.

  As the solvent for dissolving the sea component, when the sea component is a polyolefin such as polyethylene or polystyrene, an organic solvent such as toluene or trichloroethylene is used. When the sea component is polylactic acid or copolymer polyester, an aqueous alkali solution such as sodium hydroxide can be used. Further, this ultrafine fiber generation processing (sea removal treatment) can be performed by immersing a fiber entangled body made of ultrafine fibers in a solvent and squeezing it.

  Next, a treatment for imparting a polymer elastic body to the fiber entangled body including the obtained ultrafine fibers is performed. The artificial leather used in the present invention comprises a polymer elastic body. By containing a polymer elastic body, it is possible to obtain a solid tactile sensation, a leather-like appearance, and physical properties that can withstand actual use.

  The polymer elastic body is a polymer compound having rubber elasticity that expands and contracts, and examples thereof include polyurethane, styrene butadiene rubber (SBR), nitrile rubber (NBR), and an acrylic resin. Among these, a polymer elastic body mainly composed of polyurethane, specifically, a polymer elastic body composed of polyurethane of 50% by mass or more is preferably used from the viewpoint of balance between texture and physical properties.

  Examples of the polyurethane include an organic solvent-based polyurethane used in a state dissolved in an organic solvent, and a water-dispersed polyurethane used in a state dispersed in water, and both can be employed in the present invention.

  As the polyurethane used in the present invention, a polyurethane having a structure in which a polyol, a polyisocyanate, and a chain extender are appropriately reacted can be used.

  As the polyol, for example, polycarbonate-based diol, polyester-based diol, polyether-based diol, silicone-based diol, fluorine-based diol, or a copolymer obtained by combining these can be used. Of these, polycarbonate diols and polyester diols are preferably used from the viewpoint of light resistance. Furthermore, a polycarbonate diol is preferably used from the viewpoint of hydrolysis resistance and heat resistance.

  The polycarbonate diol can be produced by transesterification of an alkylene glycol and a carbonate ester or a reaction of phosgene or chloroformate ester with an alkylene glycol.

  Examples of the alkylene glycol include ethylene glycol, propylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,9-nonanediol, 1,10-decanediol, and the like. Linear alkylene glycol, branched alkylene glycol such as neopentyl glycol, 3-methyl-1,5-pentanediol, 2,4-diethyl-1,5-pentanediol, 2-methyl-1,8-octanediol, Alicyclic diols such as 1,4-cyclohexanediol, aromatic diols such as bisphenol A, glycerin, trimethylolpropane, and pentaerythritol.

  In the present invention, either a polycarbonate diol obtained from a single alkylene glycol or a copolymerized polycarbonate diol obtained from two or more kinds of alkylene glycols can be used.

  Examples of the polyisocyanate include aliphatic polyisocyanates such as hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, isophorone diisocyanate and xylylene diisocyanate, and aromatic polyisocyanates such as diphenylmethane diisocyanate and tolylene diisocyanate. Can be used in combination. Among them, aromatic polyisocyanates such as diphenylmethane diisocyanate are preferred when importance is attached to durability and heat resistance, and aliphatics such as hexamethylene diisocyanate, dicyclohexylmethane diisocyanate and isophorone diisocyanate are preferred when light resistance is important. A polyisocyanate is preferably used.

  As the chain extender, for example, amine chain extenders such as ethylenediamine and methylenebisaniline, diol chain extenders such as ethylene glycol, and polyamine obtained by reacting polyisocyanate with water can be used.

  The polymer elastic body used in the present invention may contain an elastomer resin such as polyester, polyamide and polyolefin, acrylic resin, ethylene-vinyl acetate resin, etc., as long as the performance and texture as a binder are not impaired. it can.

  In addition, the polymer elastic body includes various additives, for example, pigments such as carbon black, flame retardants such as phosphorus, halogen and inorganic, antioxidants such as phenol, sulfur and phosphorus, benzoate UV absorbers such as triazole, benzophenone, salicylate, cyanoacrylate and oxalic acid anilides, light stabilizers such as hindered amines and benzoates, hydrolysis stabilizers such as polycarbodiimide, plasticizers, electric resistance An inhibitor, a surfactant, a coagulation adjusting agent, a dye, and the like can be contained.

  The content of the polymer elastic body can be appropriately adjusted in consideration of the type of polymer elastic body to be used, the production method, and the texture.

  A method of performing either the treatment for expressing the ultrafine fiber from the ultrafine fiber expression type fiber or the treatment for imparting the polymer elastic body may be employed. When the ultrafine fiber expression treatment is performed first, the polymer elastic body holds the ultrafine fiber, so that the ultrafine fiber does not fall off and can be used for a longer period of time. Further, when the polymer elastic body is applied first, since the polymer elastic body has a structure in which the ultrafine fibers are not gripped, an artificial leather having a good texture can be obtained. Which is performed first can be appropriately selected depending on the type of polyurethane to be used.

  Moreover, when providing a polymeric elastic body after the expression process of an ultrafine fiber, it is preferable to provide the process of providing a water-soluble resin between both processes. By providing the step of applying the water-soluble resin, the surface of the fiber constituting the fiber bundle of the ultrafine fiber and the woven or knitted fabric is protected by the water-soluble resin, and on the surface of the fiber constituting the fiber bundle of the ultrafine fiber and the woven or knitted fabric. In addition, the portions directly bonded to the polymer elastic body exist intermittently rather than continuously, and the adhesion area can be moderately suppressed. As a result, it is possible to obtain an artificial leather having a high stretchability when a soft texture or a woven or knitted fabric made of a composite fiber such as a side-by-side type is used while having a good hand feeling due to the polymer elastic body. .

  As such a water-soluble resin, polyvinyl alcohol, polyethylene glycol, saccharides, starch and the like can be used. Among them, polyvinyl alcohol having a saponification degree of 80% or more is preferably used.

  Examples of the method for imparting the water-soluble resin to the fiber entangled body include a method in which the fiber entangled body is impregnated with an aqueous solution of the water-soluble resin and dried. In terms of drying conditions such as drying temperature and drying time, it is preferable that the temperature of the fiber entangled body itself provided with the water-soluble resin is suppressed to 110 ° C. or less from the viewpoint of suppressing shrinkage of the woven or knitted fabric.

  It is preferable that the application amount of the water-soluble resin is 1 to 30% by mass with respect to the mass of the fiber entangled body immediately before application. By setting the applied amount to 1% by mass or more, in the case of artificial leather using a good texture or a woven or knitted fabric made of a composite fiber such as a side-by-side type, good stretchability can be obtained. Further, by setting the applied amount to 30% by mass or less, an artificial leather having good workability and good physical properties such as wear resistance can be obtained. In addition, since the amount of the polymer elastic body that can be imparted to the fiber entangled body increases in the subsequent process, the artificial leather can be densified and the tactile sensation can be increased.

  As a method for producing the artificial leather used in the present invention, a polymer entanglement (nonwoven fabric) made of ultrafine fibers as a precursor and a laminated sheet (fiber structure) of a woven or knitted fabric were provided with a polymer elastic body and solidified. It is a preferable aspect that a shrinkage treatment is performed later.

  In the production method of artificial leather, the technique of shrinking a laminated sheet in which a woven or knitted fabric is laminated on a nonwoven fabric, which is a precursor before application of a polymer elastic body, as necessary, before application of the polymer elastic body improves the quality. Known as a method. Generally, the napped-tone artificial leather that has undergone the process of shrinking the nonwoven fabric is improved in quality because the napped density increases.

  In the method for producing artificial leather used in the present invention, a step of half-cutting a precursor sheet of artificial leather provided with a polymer elastic body in the plane direction can be performed. By including a half-cutting process, the productivity of artificial leather can be improved. For example, when adopting a method of laminating a nonwoven fabric layer composed of ultrafine fiber-generating fibers as a method of laminating a woven or knitted fabric, the precursor sheet is cut in half and the inner surface is a raised surface However, this is a preferred embodiment as a method for achieving precise quality.

  The artificial leather used in the present invention has napping on at least one side. Napping is formed on the nonwoven fabric surface. The napping treatment can be performed by buffing the surface of the nonwoven fabric using a sandpaper or a roll sander. In particular, by using sandpaper, uniform and dense napping can be formed. Furthermore, in order to form uniform napping on the surface of the artificial leather, it is preferable to reduce the grinding load.

  The artificial leather used in the present invention is suitably dyed. Dyeing is preferably carried out using a high-temperature and high-pressure dyeing machine in order to soften the texture of the artificial leather base sheet to be dyed using disperse dyes, cationic dyes and other reactive dyes.

  Furthermore, if necessary, finishing treatments such as softeners such as silicone, antistatic agents, water repellents, flame retardants, and light resistance agents can be applied, and the finishing treatment can be performed after dyeing or in the same bath as dyeing. it can. For the flame retardant treatment, known halogen flame retardants such as bromine and chlorine and non-halogen flame retardants such as phosphorus can be used. It can also be applied by coating.

  The artificial leather used in the present invention has a non-continuous resin layer formed on the raised surface, and has a layer structure of two or more resin layers. Furthermore, it is a more preferable aspect that the resin layer has a three-layer structure including an adhesive layer, an intermediate layer, and a surface layer. Here, the adhesive layer has an adhesive function between the leather-like fabric, the intermediate layer, and the resin layer of the surface layer.

  The method for forming the resin layer in the present invention is not particularly limited as long as it can be applied discontinuously on the surface of the fiber structure to be the fabric. As a coating method, for example, a method of forming a resin layer by drying after coating by a screen method such as a flat screen or a rotary screen or a gravure coating method, or a discontinuous resin on a supporting substrate such as a release paper Examples include a method of forming a resin layer by forming a film, applying an adhesive to the surface of the resin film, bonding and adhering to the surface to be a base material, and peeling the release paper.

  Furthermore, in order to make a resin layer into two layers or three layers, it can form by repeating said method twice or / and 3 times. Moreover, about said method, the same method may be repeated and it can also be used in combination of 2 or more types of different methods.

  The resin used in the resin layer in the present invention is non-yellowing polyurethane. Non-yellowing polyurethane is used because it balances the texture and physical properties, and does not cause appearance defects such as yellowing over time due to the external environment such as light, heat, gas, etc., and color change. It is done.

  Examples of the polyurethane include an organic solvent-based polyurethane used in a state dissolved in an organic solvent, and a water-dispersed polyurethane used in a state dispersed in water, and both can be employed in the present invention.

  Further, as the resin layer to be laminated, non-yellowing polyurethane is laminated. The first layer serving as the adhesive layer is made of polyether-based or polyester-based polyurethane having excellent adhesiveness, and the second and subsequent layers are preferably polycarbonate-based polyurethane having excellent durability.

  As the polyurethane used in the present invention, a polyurethane having a structure in which a polyol, a polyisocyanate, and a chain extender are appropriately reacted can be used.

  As the polyol, for example, polycarbonate-based diol, polyester-based diol, polyether-based diol, silicone-based diol, fluorine-based diol, or a copolymer obtained by combining these can be used. Of these, polycarbonate diols and polyester diols are preferably used from the viewpoint of light resistance. Furthermore, from the viewpoints of hydrolysis resistance and heat resistance, polycarbonate diols are preferably used. However, in the adhesive layer of the present invention, polyether diols or polyester diols are preferably used from the viewpoint of adhesion to the fabric surface. It is done.

  The polycarbonate diol can be produced by transesterification of an alkylene glycol and a carbonate ester or a reaction of phosgene or chloroformate ester with an alkylene glycol.

  Examples of the alkylene glycol include ethylene glycol, propylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,9-nonanediol, 1,10-decanediol, and the like. Linear alkylene glycol, branched alkylene glycol such as neopentyl glycol, 3-methyl-1,5-pentanediol, 2,4-diethyl-1,5-pentanediol, 2-methyl-1,8-octanediol, Alicyclic diols such as 1,4-cyclohexanediol, aromatic diols such as bisphenol A, glycerin, trimethylolpropane, and pentaerythritol.

  In the present invention, either a polycarbonate diol obtained from a single alkylene glycol or a copolymerized polycarbonate diol obtained from two or more kinds of alkylene glycols can be used.

  Examples of the polyisocyanate include aliphatic polyisocyanates such as hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, isophorone diisocyanate, and xylylene diisocyanate, and these can be used in combination.

  As the chain extender, for example, amine chain extenders such as ethylenediamine and methylenebisaniline, diol chain extenders such as ethylene glycol, and polyamine obtained by reacting polyisocyanate with water can be used.

  The resin used in the resin layer in the present invention can contain an elastomer resin such as polyester, polyamide, and polyolefin, acrylic resin, ethylene-vinyl acetate resin, and the like as long as the wear resistance and texture are not impaired. . In addition, these resins include various additives such as pigments such as carbon black, flame retardants such as phosphorus, halogen and inorganic, antioxidants such as phenol, sulfur and phosphorus, benzotriazole UV absorbers such as benzophenone, salicylate, cyanoacrylate and oxalic acid anilides, light stabilizers such as hindered amines and benzoates, hydrolysis stabilizers such as polycarbodiimides, plasticizers, anti-statics An agent, a surfactant, a coagulation adjusting agent, a dye, and the like can be contained.

  The method for producing a fabric according to the present invention is characterized in that the following steps are sequentially performed.

・ Dyeing ・ Application of outermost resin layer ・ Hot water treatment By applying hot water treatment after applying the outermost resin layer, the surface state of the surface resin layer changes from a flat state to an uneven state, and the light reflectance Is suppressed, the glossiness can be 20% or less, and a fabric having a high-quality matte appearance can be obtained.

  As the hot water treatment in the present invention, a known dyeing machine is used, and among these, it is preferable to use a liquid dyeing machine from the viewpoint that surface irregularities are easily generated by carrying out the cloth squeezing.

  The hot water here is preferably water of 40 ° C. or higher. When the temperature is lower than 40 ° C., the glossiness of the surface cannot be obtained.

  Moreover, in the hot water treatment in the present invention, finishing treatments such as softeners such as silicone, antistatic agents, water repellents, flame retardants, reducing agents, soaping agents, and light resistance agents can be applied as necessary. .

  The leather-like fabric of the present invention obtained from the above has a matte appearance that has the feel of natural nubuck leather, the napping feeling and breathability of suede leather, and further suppresses glossiness. It can be suitably used widely from furniture, chairs and vehicle interior materials, which are uses for which artificial leather is used, to clothing use.

  Next, an Example is given and the fabric of this invention is demonstrated in more detail.

[Measuring method and processing method for evaluation]
(1) Total thickness of the resin layer on the fabric surface:
A cross section perpendicular to the plane direction and the machine direction of the leather-like fabric was cut out and placed on a sample stage so that the cross section was not distorted. Subsequently, using a scanning electron microscope (SEM, VE-7800 manufactured by Keyence Corporation), 10 cross sections of the sample pieces of the leather-like fabric were photographed at different magnifications of 200 times. From each of these captured images, when the direction parallel to the cross section is horizontal, the napped layer side of the cross section is up, and the other surface is down, the highest position z1 of the resin layer and the lowest position z2 of the resin layer The distance between the two points was obtained, and the total thickness of the resin layer was calculated. Furthermore, the average value of the 10 values obtained by calculation was taken as the total thickness of the resin layer.

(2) Evaluation of fabric breathability:
For the leather-like fabric to be measured, one test piece of 200 mm × 200 mm is taken from five different locations, measured by the fragile method of JIS L 1096 (2015) 8.26.1, and the conversion attached to the tester. The amount of air passing through the test piece (cm ³ / cm ² · s) was calculated from the table. Furthermore, the average value of the five values obtained by calculation was defined as air permeability (cm ³ / cm ² · s).

(3) Evaluation of the glossiness of the fabric surface:
About the cloth to measure, it measured using GONIOPHOTOMETER GP-200 by Murakami Color Research Laboratory. The cloth is attached to the apparatus, the incident angle is 60 degrees, the reflection angle is 60 degrees, the rotation angle is 0 to 360 degrees, the sensitivity is HIGHVOLT: 613, and SENSITIVITY: 995, and the reflectance is measured with a light receiver. The cloth was rotated 360 degrees, data every 10 degrees was measured, and the average value was defined as the glossiness.

(4) Evaluation of fabric glossiness:
Evaluation was performed by sensory inspection of 10 subjects. Eight or more people judged that it had a surface feeling with reduced gloss (double circle), 5-7 people judged (single circle), 3-4 people judged ( (Triangle) Those judged by 2 or less were classified as (x). Double circle and single circle were accepted. In this determination, a material having a matte surface feeling that is not in a silver tone is high.

(6) Evaluation of the surface touch of the fabric:
Evaluation was performed by sensory inspection of 10 subjects. Eight or more people judged that they had a nubuck-like dense and wet touch (double circle), five to seven people judged (single circle), three to four people judged ( (Triangle) Those judged by 2 or less were classified as (x). Double circle and single circle were accepted. In this determination, those having a natural nubuck-like feel are high.

(7) Evaluation of surface nap feeling of fabric:
Evaluation was performed by sensory inspection of 10 subjects. Eight or more people have judged that it has a suede-like nap (double circle), 5-7 people have judged (single circle), 3-4 people have judged (triangle), Those judged by 2 or less were classified as (x). Double circle and single circle were accepted. In this determination, those having a natural suede-like feel are high.

[Example 1]
<Raw cotton>
Polyethylene terephthalate is used as the island component, polystyrene is used as the sea component, a sea-island type composite die having 16 islands is melt-spun at an island / sea mass ratio of 80/20, and then drawn and crimped. Then, it was cut into a length of 51 mm to obtain a raw material of sea-island type composite fiber having a single fiber fineness of 3.8 dtex.

<Entanglement of nonwoven fabric and woven / knitted fabric (laminated sheet)>
Using the above-mentioned raw material of sea-island type composite fiber, a laminated web is formed through a card and cross wrapping process, and the number of punches is 100 / cm ^{2 in} order to suppress fabric wrinkles due to a sudden change in width after fabric bonding. Needle punched. Separately, a single yarn composed of a single component having an intrinsic viscosity (IV) of 0.65, a multifilament (84 dtex, 72 filaments) having a twist number of 2500 T / m is used as a weft, and a single component having an intrinsic viscosity (IV) of 0.65 Weaving a plain fabric with a weaving density of 97 yarns / 2.54 cm and weft density of 76 yarns / 2.54 cm using multifilaments (84 dtex, 72 filaments) with a twist of 2500 T / m did. The obtained plain woven fabric was laminated on the upper and lower sides of the laminated web.

Thereafter, a needle punch is applied at a punch number (density) of 2500 / cm ² , and a laminate composed of a nonwoven fabric made of ultrafine fiber-generating fibers having a basis weight of 740 g / m ² and a thickness of 3.4 mm and a heat-shrinkable woven fabric. A sheet was obtained.

<Artificial leather>
By treating the laminated sheet obtained in the above step with hot water at a temperature of 96 ° C. to shrink, then impregnating with an aqueous PVA (polyvinyl alcohol) solution and drying with hot air at a temperature of 110 ° C. for 10 minutes, A sheet substrate having a PVA mass of 7.6 mass% with respect to the laminated sheet mass was obtained. The laminated sheet thus obtained is immersed in trichlorethylene to dissolve and remove the polystyrene as a sea component, and the sea removal sheet is formed by intertwining ultrafine fibers having an average single fiber fineness of 0.20 dtex and a plain fabric. Got. The seawater-free sheet composed of the nonwoven fabric and the plain fabric thus obtained was immersed in a polyurethane DMF (dimethylformamide) solution adjusted to a solid content concentration of 12%, and then a DMF concentration of 30%. The polyurethane was coagulated in an aqueous solution. Thereafter, PVA and DMF are removed with hot water and dried with hot air at a temperature of 110 ° C. for 10 minutes, whereby an artificial leather having a polyurethane mass of 27% by mass with respect to the total mass of the ultrafine fibers made of island components and the plain fabric is obtained. A precursor sheet was obtained.

  The artificial leather precursor sheet thus obtained was cut in half in the thickness direction and the nonwoven fabric layer inside the artificial leather precursor sheet in the vertical direction, and the half-cut sheet surface was the endless sandpaper of sandpaper count 320. Was ground to form a raised surface on the surface layer portion, and an artificial leather raw machine having a thickness of 0.81 mm was obtained. The artificial leather raw machine thus obtained was subjected to shrinkage treatment and dyeing simultaneously under a temperature condition of 120 ° C. using a liquid dyeing machine, and then dried with a dryer to obtain artificial leather. It was.

<Resin layer formation>
The rotary coating method was repeated three times on the raised surface of the artificial leather obtained in the above-described process to form a three-layer non-yellowing polyurethane resin layer whose surface was discontinuously coated. Moreover, the resin layer part was scattered in the shape of an island on the surface, the resin part and the raised part were intermittently arrange | positioned, and the ratio for which the resin part occupied to the fabric surface was 60%.
<Hot water treatment>
The artificial leather obtained in the above step was treated with hot water at 50 ° C. for 20 minutes using a liquid dyeing machine.
The fabric thus obtained had the feel of natural nubuck leather, the nap and the breathability of suede leather, and a matte surface feeling that further reduced glossiness. The results are shown in Table 1.

[Example 2]
<Raw cotton>
Polyethylene terephthalate is used as the island component, polystyrene is used as the sea component, a sea-island type composite die having 36 islands is melt-spun at an island / sea mass ratio of 55/45, and then drawn and crimped. Thereafter, it was cut into a length of 51 mm to obtain a raw material of sea-island type composite fiber having a single fiber fineness of 3.1 dtex.

<Entanglement of nonwoven fabric and woven / knitted fabric (laminated sheet)>
Using the above-mentioned raw material of sea-island type composite fiber, a laminated web is formed through a card and cross wrapping process, and the number of punches is 100 / cm ^{2 in} order to suppress fabric wrinkles due to a sudden change in width after fabric bonding. Needle punched. Separately, it is a side-by-side type composite yarn having a composite ratio (wt%) of 50:50 composed of PET having an intrinsic viscosity (IV) of 0.78 and PET having an intrinsic viscosity (IV) of 0.51, and a multi-component having a twist number of 1500 T / m. Filaments (56 dtex, 12 filaments) are used as weft yarns, single yarns consisting of a single component with an intrinsic viscosity (IV) of 0.65 and multifilaments (84 dtex, 72 filaments) with a twist number of 2500 T / m are used as warp yarns. A plain woven fabric having a warp of 69 / 2.54 cm and a weft of 83 / 2.54 cm was woven. The obtained plain woven fabric was laminated on the upper and lower sides of the laminated web.

Thereafter, a needle punch is applied at a punch number (density) of 2500 / cm ² , and a nonwoven fabric made of ultrafine fiber generating fibers having a basis weight of 560 g / m ² and a thickness of 2.3 mm, and a heat-shrinkable woven fabric. A laminated sheet was obtained.
<Artificial leather>
By treating the laminated sheet obtained in the above step with hot water at a temperature of 96 ° C. to shrink, then impregnating with an aqueous PVA (polyvinyl alcohol) solution and drying with hot air at a temperature of 110 ° C. for 10 minutes, A sheet substrate having a PVA mass of 4.0 mass% with respect to the laminated sheet mass was obtained. This laminated sheet was immersed in trichlorethylene to dissolve and remove the sea component polystyrene to obtain a seawater-removed sheet in which ultrafine fibers having an average single fiber fineness of 0.05 dtex and a plain fabric were intertwined. The seawater-free sheet composed of the nonwoven fabric and the plain fabric thus obtained was immersed in a polyurethane DMF (dimethylformamide) solution adjusted to a solid content concentration of 12%, and then a DMF concentration of 30%. The polyurethane was coagulated in an aqueous solution. Thereafter, PVA and DMF are removed with hot water and dried with hot air at a temperature of 110 ° C. for 10 minutes, whereby an artificial leather having a polyurethane mass of 20% by mass with respect to the total mass of the ultrafine fibers made of island components and the plain fabric is obtained. A precursor sheet was obtained.

  The artificial leather precursor sheet thus obtained was cut in half in the thickness direction and the nonwoven fabric layer inside the artificial leather precursor sheet in the vertical direction, and the half-cut sheet surface was the endless sandpaper of sandpaper count 320. Was ground to form a raised surface on the surface layer portion, and an artificial leather raw machine having a thickness of 0.46 mm was obtained. The artificial leather raw machine thus obtained was subjected to shrinkage treatment and dyeing simultaneously under a temperature condition of 120 ° C. using a liquid dyeing machine, and then dried with a dryer to obtain artificial leather. It was.

<Resin layer formation>
The gravure coating method was repeated twice on the raised surface of the artificial leather obtained in the above-described process to form two polyurethane resin layers whose surfaces were discontinuously coated. Moreover, the resin layer part was dotted on the surface, and the resin part and the napped part were intermittently arrange | positioned, and the ratio for which the resin part occupied on the fabric surface was 30%.
<Hot water treatment>
The artificial leather obtained in the above process was treated with hot water at 80 ° C. added with hydrosulfite and sodium hydroxide at a concentration of 2 g / l for 20 minutes using a liquid dyeing machine.
The fabric thus obtained had the feel of natural nubuck leather, the nap and the breathability of suede leather, and a matte surface feeling that further reduced glossiness. The results are shown in Table 1.

[Example 3]
<Fabric>
Instead of the artificial leather before forming the resin layer, a polyester multifilament (33 dtex, 12 filaments) having a twist number of 1800 T / m and a polyester multifilament (84 dtex, 288 filaments, an average single fiber fineness of 1800 T / m). 26 dtex) was used for the warp and weft, and a plain weave having a warp density of 108 / 2.54 cm and a weft of 92 / 2.54 cm was used. Then, it ground with the endless needle cloth, the napped surface was formed in the surface layer part, and the cloth of thickness 0.80mm was obtained. The fabric thus obtained was dyed using a liquid dyeing machine at a temperature of 130 ° C. and then dried with a dryer to obtain a fabric having a raised surface.

<Resin layer formation>
Resin layer formation and hot water treatment on the raised surface of the fabric obtained in the above step were performed in the same manner as in Example 1. The fabric thus obtained had the feel of natural nubuck leather, the nap and the breathability of suede leather, and a matte surface feeling that further reduced glossiness. The results are shown in Table 1.

[Comparative Example 1]
<Raw cotton>
In the same manner as in Example 1, a raw cotton of sea-island type composite fiber was obtained.

<Entanglement of nonwoven fabric and woven / knitted fabric>
In the same manner as in Example 1, a laminated sheet of a nonwoven fabric and a woven / knitted fabric made of sea-island type composite fibers was obtained.

<Artificial leather>
In the same manner as in Example 1, an artificial leather was obtained.

<Resin layer formation>
A fabric was obtained in the same manner as in Example 1 except that a single polyurethane resin layer whose surface was discontinuously coated was formed. Moreover, the resin layer part was scattered in the shape of an island on the surface, the resin part and the napped part were intermittently arrange | positioned, and the ratio for which the resin part occupied to the fabric surface was 8%.

<Hot water treatment>
The hot water treatment was performed in the same manner as in Example 1.
The fabric obtained in this way did not have the feel of natural nubuck leather, but rather had a strong nap feeling in suede leather, and good quality could not be obtained. The results are shown in Table 2.

[Comparative Example 2]
<Raw cotton>
In the same manner as in Example 1, a raw cotton of sea-island type composite fiber was obtained.

<Entanglement of nonwoven fabric and woven / knitted fabric>
In the same manner as in Example 1, a laminated sheet of a nonwoven fabric and a woven / knitted fabric made of sea-island type composite fibers was obtained.

<Artificial leather>
Artificial leather was obtained in the same manner as in Example 1, except that the endless sandpaper was not ground and the napped surface was not formed on the surface layer portion.

<Resin layer formation>
A fabric was obtained in the same manner as in Example 1. Moreover, the resin layer part was scattered in the shape of an island on the surface, and the resin part and the non-raised part were intermittently arrange | positioned, and the ratio for which the resin part occupied to the fabric surface was 60%.

<Hot water treatment>
No hot water treatment was performed.
The fabric obtained in this way has the feel of natural nubuck leather, but has no nap feeling of suede leather, has a strong gloss, is close to synthetic leather, and is inferior to the feel and quality. Met. The results are shown in Table 2.

[Comparative Example 3]
<Raw cotton>
In the same manner as in Example 1, a raw cotton of sea-island type composite fiber was obtained.

<Entanglement of nonwoven fabric and woven / knitted fabric>
In the same manner as in Example 1, a laminated sheet of a nonwoven fabric and a woven / knitted fabric made of sea-island type composite fibers was obtained.

<Artificial leather>
In the same manner as in Example 1, an artificial leather was obtained.

<Resin layer formation>
Using a rotary coating machine, one polyurethane resin layer was formed on the entire surface of the skin. Moreover, the resin layer part was entirely covered with the resin layer part of the surface, and the ratio for which the resin part occupied to the fabric surface was 100%.

<Hot water treatment>
The fabric was obtained as a synthetic leather without performing hot water treatment.
Although the fabric thus obtained has the feel of natural nubuck leather, it does not have the feeling of napping of suede leather and has a strong gloss, which is inferior to the feel and quality of conventional synthetic leather. It was a thing. The results are shown in Table 2.

Claims (4)

  A fiber structure comprising ultrafine fibers having an average single fiber fineness of 0.0001 dtex or more and 0.5 dtex or less, wherein at least one surface of the fiber structure is raised, and the raised surface is intermittently 2 A leather-like fabric having a resin layer made of non-yellowing polyurethane and having a surface glossiness of 20% or less.   The leather-like fabric according to claim 1, wherein the resin layer has a three-layer structure of an adhesive layer, an intermediate layer, and a surface layer.   The leather-like fabric according to claim 1 or 2, wherein the total thickness of the resin layer is 0.001 to 0.400 mm. The air permeability of the fabric according to JIS L 1096 8.26.1 in the Frazier method is 1.0 cm ³ / cm ² · s or more in the air permeability evaluation of the fabric. The leather-like fabric described.