JP2008057098A - Napped sheet and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a napped sheet having excellent flexibility and durability of appearance, and to provide a method for producing the napped sheet. <P>SOLUTION: The napped sheet comprises an ultrafine fiber nonwoven fabric comprising ultrafine fiber having 0.0001-0.5 dtex single fiber fineness and containing an ethylene-vinyl ester copolymer and fine particles. The method for producing the napped sheet involves imparting 0.01-10 wt.% ethylene-vinyl ester copolymer and 0.01-10 wt.% fine particles to the ultrafine fiber nonwoven fabric comprising the ultrafine fiber having 0.0001-0.5 dtex single fiber fineness. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a raised sheet similar to leather such as suede and nubuck, and a method for producing the same.

  Napped-tone sheet made of ultra-fine fiber nonwoven fabric and elastic resin has a touch similar to that of natural leather and has excellent features not found in natural leather such as easy care, so it is widely used in various applications. ing.

  In order to obtain the characteristic touch, lighting effect, and high-quality feeling, the napped-tone sheet is composed of ultrafine fibers having a single fiber fineness of 0.5 dtex or less. Due to its thinness, the appearance of such ultrafine fibers is likely to change due to the formation and removal of pills and peaches. In order to solve this problem, a method is generally employed in which a solution or dispersion of an elastic resin such as polyurethane is used to form an ultrafine fiber binder. In particular, a napped sheet (Patent Document 1) having a fine powder having a Brinell hardness of 8 or more and an average particle size of 10 μm or less to obtain sufficient wear properties, and a suede containing silica in ultrafine fibers An artificial leather (Patent Document 2) is disclosed.

  Although the wear properties can be improved by these means, in order to improve the wear properties by these means, it is necessary to contain a large amount of an elastic polymer, and a rubber-like texture is easily obtained and a flexible texture is obtained. It was difficult.

In response to this problem, the present inventors proceeded with the entanglement between ultrafine fibers, thereby not containing an elastic polymer or containing only a very small amount, thereby achieving a leather-like sheet that achieves both wear properties and sheet flexibility. It has been found that a product (Patent Document 3) can be obtained. However, in order to obtain sufficient entanglement for obtaining wear properties, the sheet configuration and production conditions are easily limited, and there is a problem that it is difficult to expand the application range.
Japanese Patent Laid-Open No. 9-250063 JP 2004-339617 A JP-A-2005-054445

  In view of the background of the prior art, the present invention is intended to provide a nap-like sheet having excellent texture flexibility and appearance durability, and a method for producing the same.

  In order to solve the above problems, the present invention mainly has the following configuration. That is, the napped-tone sheet of the present invention is characterized in that the ultrafine fiber nonwoven fabric composed of ultrafine fibers having a single fiber fineness of 0.0001 to 0.5 dtex contains an ethylene-vinyl ester copolymer and contains fine particles. It is.

  Moreover, the manufacturing method of the napped-tone sheet | seat of this invention assign | provides 0.01-10 weight% of ethylene-vinyl ester copolymer to the ultrafine fiber nonwoven fabric which consists of an ultrafine fiber with a single fiber fineness of 0.0001-0.5 dtex. In addition, 0.01 to 10% by weight of fine particles are provided.

  Another aspect of the raised sheet of the present invention is that the ultrafine fiber nonwoven fabric in which ultrafine fibers having a single fiber fineness of 0.0001 to 0.5 dtex are intertwined contains an ethylene-vinyl ester copolymer. It is a feature.

  Furthermore, in another aspect of the method for producing the raised sheet of the present invention, a nonwoven fabric made of a composite fiber having a single fiber fineness of 1 to 50 dtex is produced by a needle punch method, and then the single fiber fineness is 0 by an ultrafine fiber expression treatment. A non-woven fabric of 0.0001 to 0.5 dtex is obtained, and after high-speed fluid treatment, 0.01 to 10% by weight of an ethylene-vinyl ester copolymer is added.

  ADVANTAGE OF THE INVENTION According to this invention, the napping sheet | seat sheet which is excellent in the softness of a texture and durability of an external appearance can be provided.

  The raised sheet of the present invention is made of ultrafine fibers having a single fiber fineness of 0.0001 to 0.5 dtex.

  In the present invention, it is important for the ultrafine fiber nonwoven fabric to contain fine particles or the ultrafine fibers of the ultrafine fiber nonwoven fabric to be intertwined with each other in order to improve wear resistance, and further, an ethylene-vinyl ester copolymer is used. By including, more remarkable wear physical properties can be obtained. That is, the generation of pills can be largely suppressed by including an ethylene-vinyl ester copolymer, but the generation of pills of fibers is further effectively suppressed by including fine particles. The effect appears. In addition, even when the ultrafine fibers are entangled with each other, the fibers are restrained and the dropout of the fibers is suppressed and the form stability is improved. However, when the ultrafine fiber nonwoven fabric in which the ultrafine fibers are entangled with each other contains the ethylene-vinyl ester copolymer, generation of pills can be greatly suppressed. In addition, the ultrafine fiber nonwoven fabric in which the ultrafine fibers are entangled with each other contains fine particles together with the ethylene-vinyl ester copolymer, thereby further suppressing the generation of pills while suppressing the curing of the texture. . On the other hand, in the case of the ultrafine fiber nonwoven fabric in which the ultrafine fibers are not entangled with each other, even if an ethylene-vinyl ester copolymer or fine particles are contained, this effect can hardly be observed.

  The single fiber fineness of the ultrafine fibers constituting the ultrafine fiber nonwoven fabric is more preferably 0.001 to 0.3 dtex, and further preferably 0.005 to 0.15 dtex. If it is less than 0.0001 dtex, the strength decreases, which is not preferable. On the other hand, if it exceeds 0.5 dtex, the texture becomes stiff, and it is difficult to obtain sufficient entanglement, which causes problems such as deterioration of surface quality and wear properties in the present invention. The ultrafine fiber has a single fiber fineness in the range of 0.05 to 0.5 dtex, in particular, because it combines the excellent feel and surface quality of ultrafine fibers with light resistance. Suitable for applications that require. Moreover, the fiber of the fineness exceeding said range may be contained in the range which does not impair the effect of this invention.

  The ultrafine fiber nonwoven fabric in the present invention may be either a short fiber nonwoven fabric or a long fiber nonwoven fabric. However, considering the texture, a short fiber nonwoven fabric having a fiber length of 10 to 100 mm is preferable. More preferably, it is 20-70 mm. When the fiber length exceeds 100 mm, the texture tends to be hard, and when the fiber length is less than 10 mm, the dropout tends to increase, and the properties such as strength and wear properties in the present invention tend to be lowered.

  The fiber length referred to in the present invention is a value obtained by directly measuring the length of the ultrafine fiber extracted from the nonwoven fabric.

  The polymer constituting the ultrafine fiber is not particularly limited, and can be used according to the use, for example, polyester, polyamide, polypropylene, polyethylene, etc., but in terms of dyeability, strength, durability, and fastness. Polyester is preferable.

  The polyester that can be preferably used in the present invention is a polymer synthesized from a dicarboxylic acid or an ester-forming derivative thereof and a diol or an ester-forming derivative thereof, and can be used as long as it can be used as a composite fiber. It is not limited. Specifically, for example, polyethylene terephthalate, polytrimethylene terephthalate, polytetramethylene terephthalate, polycyclohexylene dimethylene terephthalate, polyethylene-2,6-naphthalenedicarboxylate, polyethylene-1,2-bis (2- Chlorophenoxy) ethane-4,4′-dicarboxylate and the like. In the present invention, polyethylene terephthalate, which is most commonly used, or a polyester copolymer mainly containing ethylene terephthalate units is preferably used.

  Moreover, the nonwoven fabric in this invention comprises the napped-tone sheet | seat which has napping, and the fiber which comprises a non-woven fabric forms napping. The length of this napping is not particularly limited, and it can have various napping lengths like natural leather such as velor, suede and nubuck, but the napping length in terms of excellent wear resistance in the present invention. Those having a short nubuck-like appearance are preferred.

The ultrafine fiber nonwoven fabric in the present invention preferably has a basis weight of 100 to 550 g / m ² , and more preferably 140 to 350 g / m ² . When the weight per unit area is less than 100 g / m ² , the physical properties of the nonwoven fabric structure alone are lowered. When the woven fabric and / or the knitted fabric are laminated, the appearance of the woven fabric and / or the knitted fabric is easily visible on the surface. Is unfavorable because of lowering. Further, when the weight per unit area exceeds 550 g / m ² , the wear resistance in the present invention tends to decrease, which is not preferable. Especially in the range of 200 to 550 g / m ² of the ultra-fine fiber nonwoven fabric, the texture becomes harder than that of the low basis weight, but there is an effect of improving physical properties such as tensile strength and tearing strength. It is suitable for applications that require high strength.

The fiber apparent density of microfibrous non-woven fabric of the present invention is preferably 0.230~0.700g / cm ^3, more preferably 0.250~0.500g / cm ^3, 0.300~0.450g / Cm ³ is particularly preferred. When the apparent fiber density is less than 0.230 g / cm ³ , tearing or stroking occurs when dyeing is performed, and it is difficult to obtain sufficient strength and wear resistance in the present invention. On the other hand, when the apparent fiber density exceeds 0.700 g / cm ³ , it becomes a paper-like texture, which is not preferable.

  The fiber basis weight is measured according to JIS L1096 8.4.2 (1999), and the apparent fiber density is obtained by measuring the basis weight according to JIS L1096 8.4.2 (1999) and then measuring its thickness. The average value of the apparent fiber density was defined as the apparent fiber density. For thickness measurement, a dial thickness gauge (trade name; Peacock H, manufactured by Ozaki Seisakusho Co., Ltd.) was used, and 10 arbitrary positions of the sample were measured, and the average value was used. The fiber apparent density in the present invention refers to the apparent density of the fiber material. Therefore, for example, in the case of a nonwoven fabric structure impregnated with a resin other than the fiber material, the apparent density of the fiber material excluding the resin is shown.

  Moreover, it is preferable that the nonwoven fabric in this invention is 70 N / cm or more in any tensile strength of a length and a horizontal direction. When the tensile strength in either the vertical or horizontal direction is less than 70 N / cm, when a napped sheet is used, the process passability in the next higher-order processing step is deteriorated, and there is a tendency that tearing, dimensional change, etc. occur. Therefore, it is not preferable. Moreover, when making it a nap-like sheet | seat, in order to acquire sufficient physical property, it is necessary to provide a large amount of binders, and there also exists a problem which a texture tends to become hard. In addition, although the upper limit of this tensile strength is not specifically limited, Usually, it will be 200 N / cm or less. Here, the tensile strength was measured according to JIS L 1096 8.12.1 (1999), a sample having a width of 5 cm and a length of 20 cm, and a tensile speed of 10 cm / min with a constant-speed extension type tensile tester at a gripping interval of 10 cm. It was obtained by elongating. From the obtained value, the load per 1 cm width was defined as tensile strength (unit: N / cm). In order to obtain these strengths, the strength of the fibers used is preferably 2 cN / dtex or more.

  Furthermore, it is preferable that the nonwoven fabric in this invention is 5-30N in any tear strength of a length and a horizontal direction. When the tearing strength in either the vertical or horizontal direction is less than 3N, the process passability is lowered and stable production becomes difficult. On the other hand, if the tearing strength in either the vertical or horizontal direction exceeds 50 N, it generally tends to be too soft and it is difficult to balance the texture. The tear strength was measured based on JIS L 1096 8.15.1 (1999) D method (pendulum method).

  In order to obtain these tear strengths, it can be achieved by adjusting the apparent fiber density of the ultrafine fiber nonwoven fabric to an appropriate range, and generally the strength tends to decrease as the density increases.

  In the nonwoven fabric in the present invention, the stress at 10% elongation in the vertical direction is preferably 8 N / cm or more, in order to prevent deformation and tearing of the sheet in a subsequent process performed according to the use. It is more preferable. The upper limit of the stress at the time of 10% elongation is not particularly limited, but if it exceeds 50 N / cm, the texture is hardened and workability is lowered, which is not preferable. In the case of manufacturing by the above-described manufacturing method, the value of stress at the time of 10% elongation can be improved by sufficiently performing needle punch processing or high-speed fluid processing. Moreover, the value of such stress can be increased by laminating woven fabric and / or knitted fabric.

  The stress (modulus) at 10% elongation was measured in the same manner as the tensile strength measurement method, and the strength at 10% elongation was taken as the value.

  The physical properties of the above-mentioned ultrafine fiber nonwoven fabric are important elements for obtaining the wear resistance in the present invention. This can be achieved by the highly entangled ultrafine fibers as will be described later.

  The ethylene-vinyl ester copolymer in the present invention is an important element for improving wear resistance and is a copolymer containing an ethylene unit and a vinyl ester unit. Here, examples of the vinyl ester unit include vinyl acid alkyl esters such as vinyl isononanoate, vinyl acetate, vinyl pivalate, vinyl propionate, vinyl laurate, and vinyl butyrate. As a vinyl ester unit, you may consist of two or more types of vinyl ester units. In particular, an ethylene-vinyl acetate copolymer is preferable from the viewpoint of water resistance, alkali resistance, weather resistance, and compatibility with nonpolar materials such as synthetic fibers.

  The elongation at break of the ethylene-vinyl ester copolymer of the present invention is preferably 800% or more, and more preferably 1200% or more. This is because by setting the elongation at cutting to 800% or more, high tear strength can be obtained and flexibility can be easily obtained.

  The elongation at break of the ethylene-vinyl ester copolymer referred to in the present invention was measured in accordance with JIS K6251 (2004) for a film cut into a dumbbell shape No. 3 having a thickness of 0.1 to 2 mm prepared at room temperature. Elongation at cutting.

  As a binder of the napped-tone sheet comprising the ultrafine fiber nonwoven fabric of the present invention, polyurethane, polyvinylidene chloride, polyvinyl chloride, polyamide, polyamino acid, polyvinyl acetate, ethylene-vinyl ester copolymer, polyacrylic acid copolymer, poly An acrylic acid ester, SBR, NBR, etc. may be included.

  In the present invention, the content of the ethylene-vinyl ester copolymer is preferably 0.01 to 10% by weight, and preferably 0.2 to 5% by weight, based on the total fiber weight of the ultrafine fiber nonwoven fabric. More preferred. If the content is less than 0.01% by weight, sufficient wear resistance cannot be obtained. Conversely, if the content exceeds 10% by weight, the texture tends to become hard.

  Moreover, in this invention, it is preferable that the said ultrafine fiber nonwoven fabric contains an ethylene-vinyl ester copolymer, and contains microparticles | fine-particles. This is because when the ultrafine fiber nonwoven fabric contains fine particles, the amount of the ethylene-vinyl ester copolymer for obtaining the same level of wear resistance can be reduced, and the texture can be softened.

  In another aspect of the present invention, fine fibers are not essential because the ultrafine fibers are entangled with each other, but an ethylene-vinyl ester copolymer for obtaining the same level of wear resistance by containing fine particles Since the amount can be reduced and the texture can be softened, it is preferable to contain an ethylene-vinyl ester copolymer and to contain fine particles.

  The fine particles referred to in the present invention are not particularly limited as long as they are insoluble in water at room temperature. Examples thereof include inorganic substances such as silica, colloidal silica, titanium oxide, aluminum and mica, and organic substances such as melamine resin. I can do it. In particular, silica and colloidal silica are preferable in that the effect of improving wear resistance is large. The particle diameter of the fine particles of the present invention is preferably in the range of 0.001 to 50 μm, more preferably in the range of 0.01 to 10 μm. If it is less than 0.001 μm, it is difficult to obtain wear resistance properties, and if it exceeds 50 μm, it tends to fall off from the fiber and the durability in washing or the like decreases.

  Such fine particles are preferably contained in an amount of 0.01 to 10% by weight, more preferably 0.2 to 5% by weight, based on the total fiber weight of the nonwoven fabric. Moreover, it is preferable that it is uniformly contained in the whole napped-toned sheet | seat, without appreciating greatly differing before and after and right and left. If the content of such fine particles is less than 0.01% by weight, the contribution to improving wear resistance is small and the amount of ethylene-vinyl ester copolymer cannot be reduced, so the texture tends to be hard, and conversely, it exceeds 10% by weight. This is because the texture is squeezed easily.

  The napped-tone sheet of the present invention thus obtained preferably has a third or higher appearance and a weight loss of 10 mg or less in the abrasion resistance evaluation.

  The abrasion resistance evaluation referred to in the present invention is 3,000 times and 20000 times in an abrasion resistance test measured according to JIS L 1096 (1999) 8.17.5 E method (Martindale method) furniture load (12 kPa). The appearance of the test cloth after the number of times of wear was determined according to the judgment standard table of JIS L 1076 (1999) Table 2, and all are preferably grades 3 to 5. Grades 4 to 5 are more preferred for both 3000 and 20000 times. If it is less than the third grade, sufficient quality cannot be maintained, and the fifth grade is the most preferable state for evaluation. Conventionally, napped sheets have been evaluated by the number of times until the fabric layer is exposed as described in Japanese Patent Application Laid-Open No. 2003-268680 as an end point on appearance. However, in the method of evaluating changes such as the presence or absence of pills at 3000 times and 20000 times using the judgment standard table of JIS L 1076 (1999) Table 2, 20000 times are appearance after long-term use, 3000 times are short-term. The appearance after use is shown. In particular, it is important to show the stability of the form that the appearance does not change significantly after 20000 times, but the change in appearance may be large in short-term use. Therefore, in the present invention, a higher level of durability can be achieved by no change even after 3000 times. Furthermore, in a wear resistance test measured according to JIS L 1096 (1999) 8.17.5 E method (Martindale method) furniture load (12 kPa), the wear loss after 20000 times is preferably 10 mg or less, preferably 5 mg. More preferred are: When wear loss exceeds 10 mg, fluff tends to adhere to clothes and the like in actual use, which is not preferable. On the other hand, the lower limit is not particularly limited, and the raised sheet of the present invention can be obtained with almost no wear loss. Such wear resistance can be achieved for the first time by including fine particles together with the ethylene-vinyl ester copolymer.

  Moreover, this abrasion-resistant physical property can also be achieved by including an ethylene-vinyl ester copolymer in an ultrafine fiber nonwoven fabric in which ultrafine fibers are highly entangled as in another aspect of the present invention.

  In addition, the raised sheet of the present invention is a dye, a softening agent, a texture adjusting agent, an anti-pilling agent, an antibacterial agent, a deodorant, a water repellent, a light proofing agent, a wrinkle proofing agent, etc., as long as it does not depart from the effects of the present invention. The functional drug may be included.

  Next, a method for producing the napped-tone sheet of the present invention will be described.

  First, the method for producing the ultrafine fiber nonwoven fabric in the present invention will be described.

  The so-called ultrafine fiber manufacturing method in which the single fiber fineness is in the above-mentioned range is not particularly limited. For example, a method of directly spinning an ultrafine fiber, a fiber having a normal fineness and capable of generating an ultrafine fiber (composite fiber) ) Is then spun and then ultrafine fibers are generated (ultrafine treatment) to generate ultrafine fibers.

  And, as a method of using a composite fiber, for example, it can be manufactured by means such as a method of removing sea components after spinning a sea-island type composite fiber, a method of spinning and splitting a split-type composite fiber, and making it ultrafine. it can. Among these, in the present invention, it is preferable that the ultrafine fiber can be obtained easily and stably, and it is preferably produced by a sea-island type composite fiber or a split type composite fiber. It is more preferable to manufacture with an island-in-sea type composite fiber in that an ultrafine fiber composed of the same kind of polymer that can be dyed with the above dye can be easily obtained.

  The sea-island type composite fiber referred to in the present invention refers to a fiber in which two or more components are combined and mixed at an arbitrary stage to obtain a fiber cross-section in a sea-island state, and the method for obtaining this fiber is not particularly limited. For example, (1) a method in which two or more components are blended and spun in a chip state, (2) a method in which two or more components are kneaded in advance to form a chip, and then spun, (3) two components in a molten state A method of mixing the above polymer in a spinning machine pack using a static mixer or the like, (4) a method of producing using a die such as JP-B No. 44-18369, JP-A No. 54-116417, Etc. In the present invention, any method can be used to satisfactorily produce, but the method (4) is preferably employed because the selection of the polymer is easy.

  In order to use the sea-island type composite fiber for the short fiber nonwoven fabric, for example, after drawing the undrawn yarn using the die shown in the method of (4) above, it is drawn by 1 to 3 stages by wet heat or dry heat, or both Can be obtained.

  In addition, when using split type composite fiber, it can mainly carry out according to the manufacturing method of the above-mentioned sea-island type composite fiber by compounding two or more components in the die.

  In the method (4), the cross-sectional shape of the island fiber obtained by removing the sea-island type composite fiber and the sea component is not particularly limited, and for example, round, polygonal, Y, H, X, W, C, π type, etc. Is mentioned. Further, the number of polymer species to be used is not particularly limited, but it is preferably 2 to 3 components in consideration of spinning stability and dyeability, and particularly composed of 2 components of sea 1 component and island 1 component. It is preferable. The component ratio at this time is preferably 0.30 to 0.99, more preferably 0.40 to 0.97 in terms of weight ratio of island fibers to sea-island composite fibers, and 0.50 to 0.80. Is particularly preferred. If the weight ratio is less than 0.30, the sea component removal rate increases, which is not preferable in terms of cost. On the other hand, when the weight ratio exceeds 0.99, the island components tend to be joined together, which is not preferable in terms of spinning stability.

The polymer used is not particularly limited. For example, the island component is preferably polyester in terms of dyeability, strength, durability, and fastness as described above.
The polymer used as the sea component of the sea-island composite fiber is not particularly limited as long as it has chemical properties that are higher in solubility and degradability than the polymer constituting the island component. Depending on the selection of the polymer constituting the island component, for example, polyolefins such as polyethylene and polystyrene, 5-sodium sulfoisophthalic acid, polyethylene glycol, sodium dodecylbenzenesulfonate, bisphenol A compound, isophthalic acid, adipic acid, dodecadioic acid, Polyester etc. which copolymerized cyclohexyl carboxylic acid etc. can be used. Polystyrene is preferable from the viewpoint of spinning stability, but a copolymer polyester having a sulfone group is preferable because it can be easily removed without using an organic solvent. The copolymerization ratio is preferably 5 mol% or more from the viewpoint of processing speed and stability, and 20 mol% or less from the viewpoint of ease of polymerization, spinning and stretching. A preferred combination in the present invention is a copolyester having polyester as the island component and polystyrene or sulfone group as the sea component.

  To these polymers, inorganic particles such as titanium oxide particles may be added to the polymer in order to improve the concealing property. In addition, lubricants, pigments, heat stabilizers, ultraviolet absorbers, conductive agents, heat storages, etc. An agent, an antibacterial agent and the like can be added according to various purposes.

  Examples of the means for forming the composite fiber into a nonwoven fabric include a papermaking method, a needle punch method, a hot melt method, a resin bond method for a short fiber nonwoven fabric, and a spun bond method and a melt blow method for a long fiber nonwoven fabric.

  The single fiber fineness of the composite fiber thus obtained is in the range of 1 to 50 dtex. If the single fiber fineness is less than 1 dtex, it will be difficult to cut the fiber and needle barb by the needle punch described later, and it will be difficult to obtain sufficient strength, and if it exceeds 50 dtex, the needle will break easily.

  The single fiber fineness of the ultrafine fiber obtained from this composite fiber is 0.0001 to 0.5 dtex, preferably 0.001 to 0.3 dtex, and more preferably 0.005 to 0.15 dtex. If the single fiber fineness is less than 0.0001 dtex, the strength is reduced. Conversely, if it exceeds 0.5 dtex, the texture becomes stiff and it is difficult to obtain sufficient entanglement in the high-speed fluid treatment described later. This also causes problems such as a decrease in wear resistance in the case. Moreover, the fiber of the fineness exceeding said range may be contained in the range which does not impair the effect of this invention.

  The method of setting the single fiber fineness of such ultrafine fibers in such a range is not particularly limited, and can be easily achieved by adjusting the supply amount of the island component polymer when manufacturing the above-described composite fiber. it can.

  Although the length of the fiber which comprises the ultrafine fiber nonwoven fabric in this invention is not specifically limited, A short fiber is preferable at the point which is excellent in the quality and the texture. As a method for obtaining such ultrafine short fibers, there are a method of cutting the above-mentioned composite fiber to an appropriate length and then making it ultrafine, a method of making the composite fiber ultrafine and then cutting, a method of directly cutting melt-spun ultrafine fibers, etc. It is preferable to cut the composite fiber to an appropriate length and then make it ultrafine. The fiber length is preferably 100 mm or less, more preferably 70 mm or less in consideration of productivity and the texture of the product obtained. A fiber having a fiber length exceeding 100 mm may be included as long as the effects of the present invention are not impaired. Further, the lower limit of the fiber length is not particularly limited, and can be appropriately set depending on the production method. However, if the length is less than 10 mm, dropout tends to increase, and the properties such as strength and wear resistance in the present invention tend to decrease. The length is preferably 10 mm or more.

  As a method for obtaining such a fiber length, a method of shortening the fiber with a rotary cutter or a guillotine cutter is preferably employed.

  Next, a method for producing an ultrafine fiber nonwoven fabric will be described.

  After obtaining the ultrafine fiber, it may be formed into a non-woven fabric by the above-mentioned method. However, in the present invention, the non-woven fabric is preferably employed as a method for producing the non-woven fabric, then made into a non-woven fabric by a composite fiber, and then ultra-fine fiber non-woven fabric. And a method of performing a high-speed fluid treatment.

  As a method for forming a short fiber into a web, a dry method obtained by using a card, a cross wrapper, a random weber, or a wet method such as a papermaking method can be employed. A dry method that can easily combine these two types of entanglement treatment is preferred. In order to impart appropriate elongation or non-elongation, or to improve physical properties such as strength of the resulting nonwoven fabric, it can be integrated with other woven fabrics, knitted fabrics and nonwoven fabrics during the entanglement treatment.

  A preferable method for obtaining the ultrafine fiber nonwoven fabric of the present invention is as follows. That is, a web is produced by a dry method using 1 to 50 dtex conjugate fibers, this web is made into a nonwoven fabric composed of conjugate short fibers by needle punching, and then ultrafinened to obtain an ultrafine fiber nonwoven fabric. Here, it is preferable to perform high-speed fluid processing, for example, water jet punch processing by water flow. By combining this needle punch process and high-speed fluid process, it is possible to highly entangle ultrafine short fibers.

Nonwoven fabric made of such composite fibers, by a needle punching process, the fiber apparent density preferably in the 0.120~0.300g / cm ^3, and more preferably to 0.150~0.250g / cm ^3. When the apparent fiber density is less than 0.120 g / cm ³ , the entanglement is insufficient and the desired physical properties are difficult to obtain. The upper limit of the apparent fiber density is not particularly defined, but if it exceeds 0.300 g / cm ³ , problems such as needle needle breakage and remaining needle holes are likely to occur, which is not preferable.

In the needle punch according to the present invention, it is preferable that the fibers are sufficiently entangled rather than merely serving as temporary fixing for obtaining process passability. Therefore, a driving density of 100 / cm ² or more is preferable, 500 / cm ² or more is more preferable, and 1000 / cm ² or more is particularly preferable.

  The nonwoven fabric composed of the composite fiber thus obtained is preferably shrunk by dry heat and / or wet heat, and further densified.

  After making the composite fiber nonwoven fabric using the composite fiber, the composite fiber is made ultrafine to obtain an ultrafine fiber nonwoven fabric. The ultrafine treatment method is not particularly limited, and examples thereof include a mechanical method and a chemical method. The mechanical method is a method of miniaturization by applying a physical stimulus, for example, a method of applying pressure between rollers in addition to the method of giving an impact such as the needle punch method or the water jet punch method described above, Examples include a method of performing ultrasonic treatment. The chemical method includes, for example, a method in which at least one component constituting the composite fiber is subjected to changes such as swelling, decomposition, and dissolution by a drug. In particular, the method of preparing a nonwoven fabric with a composite fiber comprising an alkali-degradable sea component and then treating it with a neutral to alkaline aqueous solution to make it ultrafine is preferable in terms of the working environment without using a solvent. This is one of the preferred embodiments. The neutral to alkaline aqueous solution here is an aqueous solution having a pH of 6 to 14, and the chemicals used are not particularly limited. For example, an aqueous solution containing organic or inorganic salts may be used as long as it exhibits a pH in the above range, and alkali metal salts such as sodium hydroxide, potassium hydroxide, lithium hydroxide, sodium carbonate, sodium bicarbonate, calcium hydroxide, water Examples include alkaline earth metal salts such as magnesium oxide. Further, if necessary, amines such as triethanolamine, diethanolamine, monoethanolamine, a weight loss accelerator, a carrier, and the like can be used in combination. Of these, sodium hydroxide is preferable in terms of price and ease of handling. Furthermore, it is preferable that the sheet is subjected to the neutral to alkaline aqueous solution treatment described above, and then neutralized and washed as necessary to remove the remaining chemicals and decomposition products, and then dried.

  Furthermore, when performing high-speed fluid processing, it is possible to combine high-speed fluid processing with ultrafine processing, but at least after ultrafine processing is completed, performing high-speed fluid processing is more likely to involve entanglement between ultrafine fibers. Rather, it is preferable to perform the high-speed fluid processing after the ultrafine processing is completed.

  As such high-speed fluid processing, it is preferable to perform water jet punch processing using a water flow in terms of the working environment. At this time, it is preferable to perform the water in a columnar flow state.

  In such treatment, it is preferable to perform high-speed fluid treatment at least once with a jet force of 0.16 to 1.60 N per hole from a nozzle arranged with a hole interval of 0.15 to 2.50 mm. . The hole interval is more preferably 0.20 to 2.00 mm, and further preferably 0.25 to 1.50 mm. Further, the condition that the jet force per hole is 0.18 to 1.50 N is more preferable, and the condition that 0.20 to 1.40 N is more preferable. When the hole interval is less than 0.15 mm, the amount of water discharged in one process increases, and water that stays without passing through the nonwoven fabric or the support tends to be generated. May lower. This is because, when the hole interval exceeds 2.50 mm, striking marks imparted to the sheet by the water flow are conspicuous, and confounding may not proceed in the untreated part. Further, if the jet force per hole is less than 0.16N, sufficient entanglement cannot be obtained, and the wear resistance of the product may be insufficient. If the jet force per hole exceeds 1.60 N, the nonwoven fabric Further, it is not preferable because water that cannot pass through the support and stays therein is likely to be generated and the water jet effect is remarkably lowered and uniform treatment may be difficult. Since such a jet force is easily obtained by setting a relatively large hole diameter, the hole diameter is preferably 0.08 to 0.25 mm, and more preferably 0.10 to 0.20 mm.

  The jet force per hole is determined according to the following equation, with the hole diameter as the fluid discharge diameter.

di: Hole diameter (mm)
Pg: Water pressure (MPa)
F: Jet force per hole (N)
In the case of processing a plurality of times, it is not necessary to use the same conditions for all of the specifications. For example, it is possible to use a nozzle having a large hole diameter and a small hole diameter in combination, but it is preferable to process at least once under the above conditions. Further, if the hole diameter is less than 0.06 mm, clogging of holes is likely to occur, and this is not preferable because there is a problem that costs increase due to the necessity of highly filtering water. Further, for the purpose of achieving uniform entanglement in the thickness direction and / or for the purpose of improving the smoothness of the surface of the nonwoven fabric, the treatment is preferably repeated many times. Further, the jet force is appropriately selected depending on the basis weight of the nonwoven fabric to be treated, and the higher the basis weight, the higher the jet force. The term “multiple times” as used herein means that a single nozzle plate having holes arranged in a direction perpendicular to the conveyer and / or cylinder to be conveyed passes a plurality of times.

  In addition, you may perform a fluid immersion process before performing a high-speed fluid process to the nonwoven fabric which consists of composite fibers, or an ultrafine fiber nonwoven fabric. To further improve the surface quality, a method of moving the nozzle head and the non-woven fabric conveyor and / or cylinder in a different direction from the traveling direction, and inserting a wire mesh between the non-woven fabric and the nozzle after entanglement. It is also possible to carry out watering methods. In this way, the ultrafine fibers are preferably entangled until the 10% modulus in the vertical direction is 8 N / cm or more, more preferably 10 N / cm or more.

  In general, in the case of an ultrafine fiber obtained from a composite fiber, an ultrafine fiber bundle in which the fibers are concentrated is mainly entangled, but in such an ultrafine fiber nonwoven fabric according to the present invention, It is possible to obtain an ultrafine fiber nonwoven fabric in which ultrafine fibers are highly entangled to such an extent that entanglement is hardly observed, and it is also possible to improve surface characteristics such as wear properties in the present invention.

  The method for producing a napped-tone sheet according to the present invention can be obtained by the above-described process particularly from the difference between fibers that are easily entangled by needle punching and fibers that are easily entangled by high-speed fluid treatment. In other words, when the fiber of 1 to 50 dtex is thick, the entanglement is better with the needle punch, and in the ultrafine region of 0.0001 to 0.5 dtex, the entanglement tends to be better with the high-speed fluid treatment. It is. In order to combine these fiber fineness and the entanglement method, an ultrathinning treatment is performed by sufficiently entanglement using a composite composite fiber having a fineness of 1 to 50 dtex by needle punching and then obtaining an ultrafine fiber of 0.0001 to 0.5 dtex. Thereafter, (or at the same time) a method of performing high-speed fluid treatment is the most preferable production method.

  In addition, as long as the napped-tone sheet | seat of this invention contains the above-mentioned ultrafine fiber nonwoven fabric, it may contain laminated | woven knitted fabrics.

  Lamination of the woven and knitted fabric and the ultrafine fiber nonwoven fabric can be achieved by stacking them before the needle punching step or the high-speed fluid processing step, and integrating them by each processing. At this time, the needle punching step and the high-speed fluid treatment step may be performed in any step, but from the viewpoint that the fibers constituting the woven or knitted fabric are not easily cut, lamination by entanglement integration in the high-speed fluid treatment is preferable. .

  In addition, as the raised sheet of the present invention, at least one surface needs to be raised. The napped-tone sheet of the present invention is substantially made of a fiber material, but has a surface quality similar to that of general natural leather or artificial leather, unlike a simple nonwoven fabric. In addition, as described above, it is preferable that the napped length is short in terms of wear resistance in the present invention. As a means for obtaining such napping, it is preferable to perform napping treatment with sandpaper or a brush. Such brushing treatment can be performed before or after dyeing or before and after dyeing.

  And it is preferable that such a nap-like sheet is dyed.

  The method for dyeing the ultrafine short fiber nonwoven fabric constituting the nap-like sheet is not particularly limited, and the dyeing machine used may be any of a liquid dyeing machine, a thermosol dyeing machine, a high-pressure jigger dyeing machine, etc. It is preferable to dye using a liquid dyeing machine from the viewpoint that the texture of the resulting napped tone sheet is excellent.

  In the method for producing a napped-tone sheet of the present invention, for the purpose of improving the wear resistance in the present invention, 0.01 to 10% by weight of the ethylene-vinyl ester copolymer may be applied to the total fiber weight of the nonwoven fabric. Preferably, 0.2 to 5% by weight is more preferably applied.

In addition, the ethylene-vinyl ester copolymer is less effective in improving the wear resistance when the applied amount is less than 0.01% by weight, and when the applied amount exceeds 10% by weight, the texture tends to become hard.
The amount of the ethylene-vinyl ester copolymer applied can be adjusted by the concentration of the solution or dispersion. In particular, in the case of the pad method, the pressing pressure and clearance of the nip roller, and in the case of a method using a dyeing machine, the dehydrating conditions, spray If it is the method of injecting by, it can also adjust with the injection quantity and the conveyance speed.

  Such an ethylene-vinyl ester copolymer can be applied in a state dissolved in a solvent such as dimethylformamide, toluene, xylene, chloroform, or dispersed in water. In particular, in the present invention, it is preferably employed as an emulsion dispersed in water.

  Furthermore, in the present invention, fine particles are imparted in the same manner as the ethylene-vinyl ester copolymer. The reason is not clear, but the combined use of fine particles can reduce the amount of ethylene-vinyl ester copolymer applied to obtain the same level of wear resistance, and can also soften the texture. It is.

  In another embodiment of the present invention, it is preferable to provide an ethylene-vinyl ester copolymer and fine particles.

  Moreover, when using together microparticles | fine-particles, it is preferable to provide 0.01-10 weight% with respect to the total fiber weight of a nonwoven fabric, and, as for the application amount of this microparticle, 0.2-5 weight% is more preferable. If the applied amount of fine particles is less than 0.01% by weight, the contribution to improving wear resistance is small, and the applied amount of the ethylene-vinyl ester copolymer cannot be reduced, so the texture tends to be hard, and conversely, exceeds 10% by weight. This is because the texture is squeezed easily.

  The means for imparting the ethylene-vinyl ester copolymer is not particularly limited, and other than the pad method, a method using a liquid dyeing machine or a jigger dyeing machine, a method of spraying with a spray, etc. may be appropriately selected. it can.

  When using fine particles together, it can be dispersed in ethylene-vinyl ester copolymer solution and dispersion, or a fine particle dispersion can be applied before and after applying ethylene-vinyl ester copolymer, but the process is simplified In view of this, a method in which such fine particles are dispersed in an ethylene-vinyl ester copolymer solution or dispersion and applied simultaneously is preferable.

  The means for applying the fine particles is not particularly limited, and in addition to the pad method, a method using a liquid dyeing machine or a jigger dyeing machine, a spraying method, or the like can be used.

  It is also preferable to include a step of applying a softening agent to the fiber material in order to obtain a soft texture and a smooth surface touch. The softening agent to be used is not particularly limited, and those generally used for woven and knitted fabrics can be appropriately selected and used. For example, in the dyeing note 23rd edition (color dyeing company, issued on August 31, 2002), those described under the names of texture finish and soft finish can be appropriately selected and used. However, since a wear resistance property tends to be reduced when a softening agent is included, it is preferable to adjust the balance between the texture and the wear resistance property. Therefore, the amount is not particularly limited. However, if the amount is too small, a softening effect cannot be obtained, and if the amount is too large, it is sticky. Therefore, the amount is preferably 0.01 to 10% by weight.

  The means for applying the softening agent is not particularly limited, and a pad dye method, a method using a liquid dyeing machine or a jigger dyeing machine, a spraying method, or the like can be used.

  The ethylene-vinyl ester copolymer, fine particles and softening agent are preferably applied after dyeing. If applied before dyeing, the effect may be reduced due to omission during dyeing or uneven dyeing may occur, which is not preferable.

  Hereinafter, the present invention will be described in more detail with reference to examples. In addition, the physical-property value in an Example was measured by the method described below.

(1) Weight per unit area and fiber apparent density The basis weight was measured by the method of JIS L 1096 8.4.2 (1999). Further, the thickness was measured with a dial thickness gauge (manufactured by Ozaki Mfg. Co., Ltd., trade name “Peacock H”), and the apparent fiber density was calculated from the basis weight value.

(2) Fiber length Fiber length was measured about 50 fibers extracted at random from the process or sheet | seat which cuts a fiber.

(3) Elongation at break of ethylene-vinyl ester copolymer The ethylene-vinyl ester copolymer emulsion was allowed to stand in a room at 23 ° C. for 1 week to form a film having a thickness of 0.15 mm, and then JIS K6251 (2004 ) And a dumbbell-shaped No. 3 test piece.

(4) Texture In a bending resilience test measured according to JIS L 1096 (2001) 8.20.1 A method (Gurley method), the bending resistance is measured using a specimen having a length of 38 mm and a width of 25 mm. did.

(5) Abrasion resistance property JIS L 1096 (1999) 8.17.5 E method (Martindale method) Wear in 3000 times and 20000 times in wear resistance test measured according to furniture load (12 kPa) The weight loss of the test cloth after the evaluation was evaluated, and the grade was determined from the appearance according to the judgment standard table of JIS L 1076 Table 2. Of these, those with lower grades were regarded as appearance, and weight loss after 2000 times was evaluated as weight loss.

(6) Tear strength Measured according to JIS L 1096 8.15.1 (1999) Method D (Pendulum Method).

Example 1
A web was prepared through a card and a cross wrapper using a sea-island composite short fiber having a single fiber fineness of 3 dtex, 36 islands, and a fiber length of 51 mm, comprising 50 parts of polystyrene as a sea component and 50 parts of polyethylene terephthalate as an island component. Next, needle punching was performed with a 1 barb type needle at a density of 2500 fibers / cm ² to obtain a sea-island type composite short fiber nonwoven fabric with an apparent fiber density of 0.210 g / cm ³ . Next, it is immersed in an aqueous solution of 12% by weight of polyvinyl alcohol having a degree of polymerization of 500 and a degree of saponification of 88% heated to about 95 ° C. so as to give an adhesion amount of 25% by weight with respect to the weight of the nonwoven fabric. Simultaneously with impregnation with alcohol (hereinafter referred to as PVA), a shrinkage treatment was performed for 2 minutes, followed by drying at 100 ° C. to remove moisture. The obtained sheet was treated with trichrene at about 30 ° C. until the polystyrene was completely removed to obtain an ultrafine short fiber nonwoven fabric having a single fiber fineness of about 0.042 dtex. Next, the water jet punch consisting of a nozzle head with a 0.1 mm hole diameter and a 0.5 mm interval was processed at 15 MPa alternately at the front and back at a processing speed of 10 m / min (4 times in total), and PVA was removed along with ultrafine fibers. Was entangled.

  The surface of the ultra-fine short fiber nonwoven fabric obtained in this way is a wide belt sander manufactured by Kikukawa Iron Works Co., Ltd., and the weight loss due to buffing of the fiber sheet is 5 wt. After buffing to a percentage, it was dyed with a disperse dye in a circular dyeing machine.

  Subsequently, a 1% by weight dispersion of an ethylene-vinyl acetate copolymer water emulsion (trade name; Sumikaflex (registered trademark) 755, manufactured by Sumika Chemtex Co., Ltd.) having an elongation at break of 1500% as a resin was prepared, The wet pick-up was processed by the dip nip method so that the wet pick-up would be 100%, dried, and 1% by weight was applied to the ultrafine short fiber nonwoven fabric.

  The properties of the obtained napped-tone sheet are as shown in the table, have a soft texture, and have excellent wear resistance.

Example 2
As a resin, an aqueous emulsion of silica (trade name; Snowtex (registered trademark) 20L, manufactured by Nissan Chemical Industries, Ltd.) together with the ethylene-vinyl acetate copolymer of Example 1 is used as a 0.5 wt% dispersion. A napped-toned sheet was obtained in the same manner as in Example 1 except that the wet pick-up was adjusted to 100% by the dip nip method, dried, and applied in a total amount of 1% by weight to the ultra-fine short fiber nonwoven fabric. .

  The properties of the obtained napped-tone sheet are as shown in the table, have a soft texture, and have excellent wear resistance. Further, the tear strength was 17N for the vertical and 9.7N for the horizontal, which was superior to Example 9 described later (vertical 13.2N, horizontal 6.8N).

Example 3
An aqueous dispersion of ultrafine short fibers having a single fiber fineness of 0.1 dtex and a fiber length of 8 mm made of polyethylene terephthalate was made, dehydrated and dried to obtain an ultrafine short fiber nonwoven fabric having a basis weight of 80 g / m ² . A napped-toned sheet was obtained in the same manner as in Example 2 except that this ultra-fine short fiber non-woven fabric was superposed on a 44 gauge, 96 g / m ² double circular knitting made of polyester fiber of 33 dtex 12 filaments and water jet punched. .

  The obtained napped-toned sheet had a soft texture as shown in the table, and there was no problem in wear resistance.

Example 4
Polyethylene terephthalate and nylon 6 are alternately arrayed radially in a round hollow cross section at a weight ratio of 50:50 by a compound spinning device heated to 290 ° C., and 9 polymers each. Each filament was extruded from a die forming a filament. The extruded yarn is cooled by a cooling device using normal temperature air, and then taken up at a speed of 5000 m / min by an ejector using normal temperature air placed at a position of 100 cm below the spinneret and moved. Filaments were laminated on a manufactured deposition apparatus to obtain a composite long fiber nonwoven fabric having a single fiber fineness of 1.8 dtex.

  The obtained composite long fiber nonwoven fabric was made into an ultrafine long fiber nonwoven fabric by a water jet punch, and a nap-like sheet was obtained in the same manner as in Example 2 except that the fibers were entangled.

  As shown in the table, the napped-toned sheet obtained had a relatively hard texture, but was in an acceptable range and had no problem with wear resistance.

Example 5
A napped-tone sheet was obtained in the same manner as in Example 2 except that 0.5% by weight of the resin was added to the ultra-fine short fiber nonwoven fabric as a 0.5% by weight dispersion. The obtained napped-toned sheet had a soft texture as shown in the table, and there was no problem in wear resistance.

Example 6
A napped-tone sheet was obtained in the same manner as in Example 2 except that 9% by weight of the resin as a dispersion was added to the ultrafine short fiber nonwoven fabric. As shown in the table, the napped-toned sheet obtained had a relatively hard texture, but was in an acceptable range and had no problem with wear resistance.

Example 7
Using a polyethylene terephthalate fiber having a fiber length of 5 mm and 0.3 dtex, a paper web having a basis weight of 20 g / m ² was produced by a paper making method. This paper-making web was placed on a double circular knitting made of polyester having 33 dtex 12 filaments and having a basis weight of 77 g / m ² and placed on a screen moving at a speed of 10 m / min. Water jet punching was performed from nozzles with a diameter of 0.1 mm arranged at intervals of 6 mm three times from the side of the papermaking web, and then dried to obtain a laminate of the papermaking web and the knitted fabric.

  Subsequently, room temperature water pressurized to 15 MPa, the ultra-short fiber nonwoven fabric obtained in the same manner as in Example 1 placed on the double circular knitting side of the laminate, placed on a screen moving at a speed of 5 m / min. Were blown out from nozzles with a diameter of 0.1 mm arranged at intervals of 0.6 mm, and applied to the sheet twice, each from the surface of the ultra-fine fiber nonwoven fabric, and then alternately from the front and back of the paper making web (4 times in total), and then dried. Thus, an ultra-fine short fiber nonwoven fabric integrated and laminated was obtained.

  The obtained fiber sheet was subjected to buffing, dyeing and resin application in the same manner as in Example 2 to obtain a napped sheet. The napped-toned sheet obtained had a soft texture as shown in the table, and there was no problem with wear resistance.

Example 8
A napped-tone sheet was obtained in the same manner as in Example 2 except that the resin application was performed before dyeing. The napped-toned sheet obtained had a soft texture as shown in the table, and there was no problem with wear resistance.

Example 9
Napped texture similar to Example 2 except that an ethylene-vinyl acetate copolymer water emulsion (trade name; Sumikaflex (registered trademark) 752, manufactured by Sumika Chemtex Co., Ltd.) having an elongation at break of 360% was used. A sheet was obtained. The performance of the napping sheet obtained was as shown in the table, and there was no problem with wear resistance.

Example 10
A web was prepared through a card and a cross wrapper using a sea-island type composite short fiber having a single fiber fineness of 4 dtex, 16 islands, and a fiber length of 51 mm, comprising 20 parts of polystyrene as a sea component and 80 parts of polyethylene terephthalate as an island component. Subsequently, needle punching was performed with a 1 barb type needle at a density of 2500 fibers / cm ² to obtain a sea-island type composite short fiber nonwoven fabric with an apparent fiber density of 0.230 g / cm ³ . Next, it is immersed in an aqueous solution of 12% by weight of polyvinyl alcohol having a degree of polymerization of 500 and a degree of saponification of 88% heated to about 95 ° C. so as to give an adhesion amount of 25% by weight with respect to the weight of the nonwoven fabric. Simultaneously with impregnation with alcohol (hereinafter referred to as PVA), a shrinkage treatment was performed for 2 minutes, followed by drying at 100 ° C. to remove moisture. The obtained sheet was treated with trichrene at about 30 ° C. until the polystyrene was completely removed, and an ultra-fine short fiber nonwoven fabric having a single fiber fineness of about 0.200 dtex was obtained. Next, the water jet punch having a nozzle diameter of 0.12 mm and a nozzle head with a spacing of 0.6 mm was processed alternately at 40 mpa / min at a processing speed of 10 m / min (total 4 times), and PVA was removed along with ultrafine fibers. Was entangled.

  The surface of the ultra-fine short fiber nonwoven fabric obtained in this way is a wide belt sander manufactured by Kikukawa Iron Works Co., Ltd., and the weight loss due to buffing of the fiber sheet is 5 wt. After buffing to a percentage, it was dyed with a disperse dye in a circular dyeing machine.

  Subsequently, a 1% by weight dispersion of a water emulsion of ethylene-vinyl acetate copolymer (trade name; Sumikaflex (registered trademark) 755, manufactured by Sumika Chemtex Co., Ltd.) was prepared as a resin, and wet pick-up was performed by the dip nip method. It was processed and dried so as to be 100%, and 1% by weight was applied to the ultra-fine short fiber nonwoven fabric.

  The physical properties of the obtained napping sheet are as shown in the table, and it has a soft texture as a high-weight napping sheet, and has excellent wear resistance.

Comparative Example 1
A nap-like sheet was obtained in the same manner as in Example 1 except that no resin was added. As shown in the table, the napped-toned sheet obtained was soft in texture but had insufficient wear resistance.

Comparative Example 2
A raised sheet was obtained in the same manner as in Example 2 except that an aqueous dispersion of colloidal silica (trade name; Snowtex 20L, manufactured by Nissan Chemical Industries, Ltd.) was used instead of the resin. As shown in the table, the napped-toned sheet obtained was soft in texture but had insufficient wear resistance.

Comparative Example 3
A napped-tone sheet was obtained in the same manner as in Example 2 except that a polyurethane water emulsion (trade name; Evaphanol APC55, manufactured by Nikka Chemical Co., Ltd.) was used as the resin. As shown in the table, the napped-toned sheet obtained was soft in texture but had insufficient wear resistance.

Comparative Example 4
Colloidal silica aqueous dispersion (trade name: Snowtex 20L, manufactured by Nissan Chemical Industries, Ltd.) and polyurethane water emulsion (trade name: Evaphanol APC55, manufactured by Nikka Chemical Co., Ltd.) are each 0.5% by weight as the resins to be provided. It was adjusted to be a dispersion liquid, treated so that the wet pick-up was 100% by the dip nip method, dried, and applied in the same manner as in Example 1 except that a total of 1% by weight was applied to the ultrafine short fiber nonwoven fabric. A nap-like sheet was obtained. As shown in the table, the napped-toned sheet obtained was soft in texture, but had insufficient wear properties.

Comparative Example 5
Colloidal silica aqueous dispersion (trade name: Snowtex 20L, manufactured by Nissan Chemical Industries, Ltd.) and polyurethane water emulsion (trade name: Evaphanol APC55, manufactured by Nikka Chemical Co., Ltd.) are each 0.5% by weight as the resins to be provided. It was adjusted to be a dispersion liquid, treated so that the wet pick-up was 100% by the dip nip method, dried, and applied in the same manner as in Example 10 except that a total of 1% by weight was applied to the ultra-fine short fiber nonwoven fabric. A nap-like sheet was obtained. As shown in the table, the napped-toned sheet obtained had a soft texture as a high-weight napped-toned sheet, but had insufficient wear properties.

  According to the present invention, it is possible to obtain sufficient physical properties and quality as a napped-tone sheet even in a nonwoven fabric structure that is substantially free of a polymer elastic body and mainly made of a fiber material. The napped-tone sheet of the present invention has excellent characteristics such as recyclability, easy care, yellowing resistance, etc., such as clothing, furniture, miscellaneous goods, abrasive cloth, filters, seat sheets, ceiling materials, steering covers, etc. Of course, it can be preferably used for apparel use and car use by taking advantage of recyclability and characteristic texture.

Claims (16)

A napped-tone sheet characterized in that an ultrafine fiber nonwoven fabric composed of ultrafine fibers having a single fiber fineness of 0.0001 to 0.5 dtex contains an ethylene-vinyl ester copolymer and contains fine particles. A napped-tone sheet characterized in that an ultrafine fiber nonwoven fabric in which ultrafine fibers having a single fiber fineness of 0.0001 to 0.5 dtex are entangled with each other contains an ethylene-vinyl ester copolymer. The raised fiber sheet according to claim 2, wherein the ultrafine fiber nonwoven fabric contains an ethylene-vinyl ester copolymer and fine particles. The nap-like sheet according to claim 1 or 3, wherein the content of the fine particles is 0.01 to 10% by weight with respect to the fiber weight of the ultrafine fiber nonwoven fabric. The napping tone according to any one of claims 1 to 4, wherein the content of the ethylene-vinyl ester copolymer is 0.01 to 10% by weight with respect to the fiber weight of the ultrafine fiber nonwoven fabric. Sheet. In the abrasion resistance test in which the raised sheet is measured according to JIS L 1096 (1999) 8.17.5 E method (Martindale method) furniture load (12 kPa), the weight loss after 20000 times is 10 mg or less. And the appearance when the appearance of the test cloth after being worn 3000 times and 20000 times is judged according to the criteria table of JIS L 1076 (1999) Table 2, is grade 3 or higher. The napped-tone sheet | seat of any one of Claims 1-5 to do. The napped-tone sheet according to any one of claims 1 to 6, wherein the ethylene-vinyl ester copolymer is an ethylene-vinyl acetate copolymer. The napped-tone sheet according to any one of claims 1 to 7, wherein the elongation at break of the ethylene-vinyl ester copolymer is 800% or more. Single fiber fineness is from ultrafine fibers of 0.05～0.5Dtex, napped sheet according to any one of claims 1 to 8, basis weight is characterized by a 200~550g / ^{m 2.} The napped-tone sheet according to claim 1, which is used for automobiles. An ultrafine fiber nonwoven fabric composed of ultrafine fibers having a single fiber fineness of 0.0001 to 0.5 dtex is provided with 0.01 to 10% by weight of ethylene-vinyl ester copolymer and 0.01 to 10% by weight of fine particles. The manufacturing method of the napped-tone sheet. After producing a nonwoven fabric composed of a composite fiber having a single fiber fineness of 1 to 50 dtex by the needle punch method, and then converting this nonwoven fabric into an ultrafine fiber nonwoven fabric having a single fiber fineness of 0.0001 to 0.5 dtex by an ultrafine fiber expression treatment Furthermore, after performing a high-speed fluid process, 0.01-10 weight% of ethylene-vinyl ester copolymers are provided, The manufacturing method of the napped-tone sheet | seat characterized by the above-mentioned. The method for producing a nap-like sheet according to claim 12, wherein 0.01 to 10% by weight of the ethylene-vinyl ester copolymer and 0.01 to 10% by weight of fine particles are provided. High-speed fluid with a jet force of 0.16 to 1.60 N per hole from a nozzle arranged in an ultrafine fiber nonwoven fabric having a basis weight of 150 to 550 g / m ² at least once with a hole interval of 0.15 to 2.50 mm The manufacturing method of the napped-tone sheet | seat of any one of Claims 11-13 characterized by performing a process.
The method for producing a napped-tone sheet according to any one of claims 11, 13, and 14, wherein the ultrafine fiber nonwoven fabric is dyed before applying the fine particles. The method for producing a nap-like sheet according to any one of claims 11 to 15, wherein the ultrafine fiber nonwoven fabric is dyed before the ethylene-vinyl ester copolymer is applied.