JPH0128151B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to artificial leather with excellent clothing properties. More specifically, a non-woven fabric structure in which ultrafine fibers and fabrics are three-dimensionally intertwined and integrated is impregnated with an elastic polymer, and at least one surface is fluffed to provide flexibility, mechanical strength, and sewability. This invention relates to suede-like artificial leather that has excellent clothing properties such as recovery properties. BACKGROUND OF THE INVENTION Conventionally, artificial leather in which a nonwoven fabric using ultrafine fibers is filled with an elastic polymer has been widely known, as seen in Japanese Patent Publications No. 49-48583 and No. 51-6261. However, the base material of these artificial leathers is mostly non-woven fabric in which ultrafine fibers of 0.2 denier or less are intertwined in a three-dimensional manner, so the mechanical strength of the base material is so low that it cannot be used as clothing.
Therefore, in order to provide strength, a large amount of elastic polymer is usually impregnated into the nonwoven fabric substrate. the result,
The flexibility and drape properties of nonwoven fabrics are lost,
It only had a hard, crackly texture. Furthermore, in order to obtain artificial leather with drape properties and a soft texture, it is necessary to reduce the amount of elastomeric polymer filled or actively impart a foam structure to the filled elastomeric polymer. In such cases, the mechanical strength reinforcing effect of the elastic polymer is not sufficient, and although the resulting artificial leather is flexible, the elongation and tear strength do not reach a level that can be used as clothing, and the elongation recovery is poor. It also had disadvantages such as poor elasticity and the elbows coming off when worn. The present inventors have previously developed an artificial leather that satisfies the flexibility and physical properties necessary for clothing, which is made of a nonwoven fabric made of such ultrafine fibers and whose interstitial spaces are filled with an elastic polymer. Tokukai Akira
We proposed an improved artificial leather represented by 52-107368. Further, proposals have also been made in JP-A-53-122869 and JP-A-53-122872. The structure of the improved artificial leather in this proposal is that a knitted fabric is present in the inner layer region or the back side of an interlaced sheet made of ultrafine fibers, and the ultrafine fibers and knitted fabric are intertwined and integrated with each other. A rubber-like elastic polymer is filled in the interstitial spaces of the intertwined sheet. Artificial leather with such a structure has mechanical properties and elongation properties suitable for clothing due to the knitted fabric, so the filled elastic polymer can hold the downy hair (nup) on the surface and It is sufficient if it exists in order to give the feeling of holding it in the hand that is unique to leather. Therefore, in the artificial leather made by the present inventors, it is possible to sufficiently satisfy the mechanical strength for clothing without impairing the drape properties of the nonwoven fabric serving as the base material. The inventors of the present invention have further investigated the suitability of such artificial leather for clothing and have found that it still has many drawbacks. For example, there are the disadvantages of poor sagging during sewing, the disadvantage that the seams are not strong enough when sewn by a sewing machine, and the seams may shift when more than a certain amount of stress is applied to the seams when worn, and men's clothing. It was discovered that unevenness occurs along the seams in seamed areas with large curvature, such as sleeves and armpits (hereinafter referred to as seam puckering), resulting in a very poor appearance when tailored. The inventors of the present invention have investigated the causes of these defects and investigated improvements in depth, and as a result, we have found that low seam strength, poor sagging properties, and the seam puckering phenomenon have been solved by the use of base materials. It was discovered that there is a deep relationship with the properties of knitted fabrics, and as a result of further studies on the optimal design of these knitted fabrics, they finally arrived at the present invention and were able to provide artificial leather with extremely excellent clothing properties. It is ivy. That is, the present invention provides an intertwined body in which ultrafine fibers of 0.5 denier or less cover at least one entire surface of the fabric and are three-dimensionally intertwined with the fabric, and fluff of the ultrafine fibers is formed on the surface of the entangled body. A sheet-like article in which an elastic polymer is filled in the interstitial spaces of the entangled body, and the fibers constituting the woven fabric have a single filament fineness of 4 denier or less and are twisted at an actual twist of 100 to 1500 T/m. This invention relates to suede-like artificial leather, which is made of multifilament and is characterized by elongation of the sheet-like material under a load of 1 kg/cm of 3 to 20% in the warp direction and 5 to 40% in the weft direction. One of the key points of the structure of the artificial leather according to the present invention is the design of the fabric inside or on the back side of the entangled body used as the base. This is because the physical properties of artificial leather greatly depend on the physical properties of the textile.In this sense, the detailed explanation of the present invention will be given from the textile.The textile in the present invention is a multi-layered fabric with a single fiber fineness of 4 deniers or less. Filament is 100~1500T/m
It is essential that the material is made of real twisted material. Here, actual twist usually means the twist itself applied to this multifilament in the case of multifilament yarn, and refers to multifilament yarn that has undergone false twisting (therefore, has virtually no twist). In the case of filament yarn, it means actual twist given by additional twisting after false twisting. The fineness of the fibers that make up the fabric is closely related to the flexibility of the leather. Fabrics made of single fibers that exceed 4 deniers themselves lack flexibility, and the texture of the resulting artificial leather is hard and stiff. This does not meet the purpose of the present invention. When the denier is 4 denier or less, the resulting fabric will also be highly flexible, and the leather will also be flexible. It is essential that the fibers constituting the fabric be multifilaments with a real twist of 100 to 1500 T/m. Furthermore, 600T/m to 1200T/m is most preferable. In the case of a multifilament in which the constituent raw yarns have been subjected to a real twist of 1500 T/m or more, the resulting artificial leather has extremely low seam strength and is not suitable for practical use. In the case of filaments and untwisted multifilaments, the seam strength is significantly improved, but on the other hand, the tear strength of the leather is extremely reduced, which also results in leather that is not suitable for practical use. In the present invention, multifilament fabrics are made from raw threads twisted with a specific number of twists, thereby simultaneously improving the seam strength and tear strength, which are important among the clothing properties of artificial leather. It was found to be satisfactory. Observing the internal structure of the product of the present invention, in the case of multifilaments with a twist number of 1500T/m or more, the voids are small and there is almost no entanglement between the microfibers and the woven multifilaments, and in the case of multifilaments with a twist number of less than 100T/m. In the case of twisted multifilaments, the voids are large, and the ultrafine fibers and woven multifilaments are seen to be tightly intertwined with each other, which affects the seam strength and tear strength of artificial leather. It seems to determine the size. The multifilament in the present invention may be a usual one, such as 75d/36f, 50d/24f, polyethylene terephthalate (hereinafter abbreviated as PET),
30d/6f, 70d/24f, 20d/6f of nylon 6, etc. are preferably used. Most preferably, a multifilament in which these yarns are false-twisted is used. This is because false-twisted yarn generally has good stretch back properties and is therefore most suitable in terms of its relationship with the elongation of leather, which will be described later. Actual twisting can be easily achieved by twisting the multifilament using a normal twisting machine. The twisting direction may be either S or Z. The fabric weight is preferably 20 to 100 g/m ² . This basis weight is determined by the relationship with the basis weight of the ultra-fine fibers, and if the basis weight of the fabric is too large, the basis weight of the ultra-fine fibers must be reduced in order to obtain a product with the specified thickness. In this case, the amount of fluffed naps in the resulting product is reduced, and the resulting leather has only a poor appearance with a small writing effect.
On the other hand, if the basis weight of the fabric is small, the mechanical strength that the fabric should originally have will be reduced, and the resulting leather will have insufficient strength, making it unsuitable. In this sense, the fabric weight is preferably 20 to 100 g/m ² . Although essentially any woven fabric structure such as plain weave, twill weave, satin weave, or woven satin weave can be applied to the product of the present invention, plain weave is most preferable for the purpose of the present invention from the viewpoint of cost and process. The weave density of the plain weave may be either the same number or different numbers, but in the case of the present invention, it is preferable to have the same number.The density naturally varies depending on the fineness of the yarn used and the number of bundles, but for example, 75d/36f~
In the case of 30d/6f PET, 40 to 70 pieces/in is preferable.
Furthermore, S-twist and Z-twist multifilaments may be interwoven. The material for the multifilament of the textile is not particularly limited, and synthetic fibers such as PET, nylon 6, nylon 66, and polyacrylonitrile, and recycled fibers such as rayon and cupra rayon are preferably used, with PET being particularly preferred. Next, it is extremely important that the elongation of the artificial leather of the present invention under a load of 1 kg is within a specific range of 3 to 20% in the warp direction and 5 to 40% in the weft direction. Furthermore, 6 to 15% longitude and 8 to 25% latitude are particularly preferred. Less than 3% in longitudinal direction and/or 5% in latitudinal direction
It has become clear that if it is less than 100%, the characteristics of the garment will be extremely poor, such as poor swarming properties and seam puckering when sewing the garment, making it impossible to obtain clothing that looks well-tailored. 20% or more in longitudinal direction and/or 40% in latitudinal direction
If the elongation is above, sewing characteristics such as sagging and seam puckering will be good, but for example, if clothes made from artificial leather with such elongation are left hanging on a hanger, If you leave it on, it may stretch and not return, or when you wear it, the elbow area may stretch and not return, causing it to "fall out".
Phenomena such as drying were observed, and it was found that only a product with extremely poor elongation recovery could be obtained. It has been found that the fact that artificial leather has elongation in such a specific range also has the surprising effect of making the texture extremely soft. In the case of the artificial leather of the present invention, the elongation of the leather depends on the elongation of the entangled body, and the elongation of the entangled body depends on the elongation of the fabric that is a component of the entangled body, that is, the elongation of the leather. As a result of the study, it became clear that the elongation of the fabric depends on the elongation of the fabric. It can also be said that the elastic polymer does not substantially determine the elongation of the leather. This can be done by extracting and removing the elastic polymer from the artificial leather of the present invention using its solvent, measuring the elongation of the remaining entangled body, and then separating it by pulling out the ultrafine fibers from the entangled body. This can be easily determined by measuring the elongation of the leather and comparing it with the elongation of the leather measured in advance. Next, it is essential that the ultrafine yarn, which is one of the important elements constituting the product of the present invention, has a single fiber of 0.5 denier or less. The single fiber fineness of the ultra-fine yarn is the biggest factor determining the surface quality of the product of the present invention, and if it is larger than 0.5 denier, the writing effect will not be sufficiently expressed and the product value as leather will be lost.
An elegant lighting effect can be obtained starting from 0.5 denier or less. It is preferable that the material of the ultra-fine thread is the same as the material used for the fabric, from the perspective of dyeing, etc., but there are no particular restrictions, and examples include polyester such as PET, synthetic fibers such as nylon 6, nylon 66, polyacrylonitrile, rayon, The effects of the present invention will not be impaired even if any recycled fibers such as Cupra Rayon are used. The ultrafine yarn may be in the form of either long fibers or short fibers. However, from the viewpoint of interlacing and integrating with the fabric, short fibers are preferred. In addition, ultrafine threads may be separated into single fibers, bundled, or a mixture of single fibers and fiber bundles of various sizes, but depending on the density of the surface, In order to achieve excellent writing effects, it is preferable that the fiber be in the form of a single fiber. Furthermore, it is extremely important for the purpose of the present invention that the ultrafine threads are sufficiently three-dimensionally intertwined and integrated with each other and with the fabric. The intertwining in the present invention is mainly performed by the ultrafine fibers entering the interweave gaps of the fabric, but also by the ultrafine fibers entering the filament gaps of the multifilament constituting the fabric. In this case, in the present invention, the degree to which the ultrafine fibers enter the gaps of the multifilament and are entangled is extremely important. That is, if the degree of entanglement is very low and such entanglement is hardly observed, the seam strength will decrease as described above, which is not preferable. In addition, fraying of the fabric may occur from the cut surface. On the other hand, excessive entanglement leads to a decrease in tear strength as mentioned above. Therefore, optimizing the degree of entanglement that occurs by entering the multifilament gap is the most important element in the present invention.
The degree of entanglement is controlled by the number of twists of the multifilament. Also, the entanglement between ultrafine fibers is important for the condition of the nap on the surface. If the ultrafine fibers are not sufficiently entangled with each other, the naps will be long and have low density, making it impossible to obtain a good writing effect. In this way, the entanglement between the ultrafine fibers and the multifilaments constituting the fabric and the entanglement of the ultrafine fibers with each other are important from the physical and surface properties. The elastic polymer constituting the product of the present invention is important for gripping the base of the nap and imparting firm flexibility unique to natural leather. As mentioned above, the mechanical strength of the artificial leather of the present invention is
The advantage of the present invention is that it does not have the drawback of filling a large amount of elastic polymer in order to impart mechanical strength to the leather, thereby making the texture of the leather hard. There is one. The filling amount is preferably 10 to 100% by weight, more preferably 40 to 60% by weight based on the fiber components (ultrafine fibers + textile fibers) in the product. There are no particular restrictions on the type of elastic polymer, but polyurethanes are particularly preferred since they provide the product of the present invention with preferable flexibility. The composition of polyurethane is
As a polyol component, polyester diols such as polyethylene adipate glycol and polybutylene adipate glycol, polyether glycols such as polyethylene glycol and polytetramethylene glycol; as an isocyanate component, aromatic diisocyanates such as diphenylmethane-4,4'-diisocyanate, and dicyclohexyl. Alicyclic diisocyanates such as methane-4,4'-diisocyanate, aliphatic diisocyanates such as hexamethylene diisocyanate; as chain extenders, glycols such as ethylene glycol; diamines such as ethylene diamine and 4,4'-diaminodiphenylmethane; etc. can be used in appropriate combinations. Next, the method for producing artificial leather of the present invention will be described. First, a method for imparting elongation to a woven fabric as a starting material will be described. In order to make the leather have elongation within the specific range of the present invention, the elongation of the fabric in the leather may be approximately equal to the range of the present invention. However, it should be noted that the elongation of the fabric itself as a raw material for obtaining the leather of the present invention does not necessarily match the elongation of the fabric in the leather. This is because the processing steps from encapsulating the fabric itself in an ultrafine fiber sheet to making it into leather, such as the impregnation step with an elastic polymer,
This is because in the dyeing process, etc., tension is often applied to the fabric in the warp and weft directions, especially in the warp direction, and the elongation that the fabric itself initially had often decreases. Therefore, in order to make the elongation of the leather, that is, the elongation of the fabric in the leather, to the warp 3 to 20% and latitude 5 to 40% of the present invention, the elongation of the fabric itself before being processed into leather must be adjusted to the above-mentioned values. It is preferable to design it slightly larger. It is best to decide how large the size should be after fully considering the tension in the leather processing process, but
~10%, latitude 1~10% is preferable. When using a processing process that does not apply tension, the elongation of the raw material fabric itself almost completely matches the elongation of the fabric in the leather, that is, the leather. It goes without saying that the elongation of the leather itself may be set within the range of the elongation of the leather of the present invention. As mentioned above, various methods can be used to impart elongation to the starting material woven fabric itself that is equal to or greater than that of the woven fabric in the leather. In a preferred embodiment, a method is used in which an additionally twisted false-twisted yarn is used as a multifilament, and the elongation of the additionally twisted false-twisted yarn is utilized due to contraction in hot water. For example, it is preferable to apply elongation to the fabric itself by subjecting the fabric made of the extra-twisted false-twisted yarn to a hot water treatment in advance and then elongating it to a predetermined dimension and heat-setting it. The elongation of the fabric can be easily controlled by a combination of the temperature and time of hot water shrinkage, the degree of rubbing, the elongation rate during heat setting, and the setting temperature. In this embodiment, there are no particular restrictions on the false twisting conditions for imparting hot water shrinkability,
The number of false twists varies depending on the type of yarn, denier, etc., and is usually selected appropriately in the range of 1500 to 4000 T/m, and the direction of false twisting is different from S-twisting/Z-untwisting and Z-twisting/S-untwisting. Either is fine. However, the number of additional twists is 100 to 1500T/
Must be m. Next, a sheet made of ultra-fine fibers is made. As a method for obtaining ultrafine threads, conventionally known methods can be applied. For example, latent ultrafine yarn methods such as the sea-island fiber method and mixed fiber method, direct spinning methods as typified by Japanese Patent Application No. 40519/1983, and melt blowing methods can all be used as a method for obtaining the ultrafine yarn of the present invention. can. This can be easily made into a sheet by cutting or not cutting the ultrafine fibers and making a non-woven web by card cross layering, by paper making method, or by directly making it into a web by melt blowing. .
In view of the uniformity of the sheet and in combination with the columnar flow method, a microfiber sheet produced by the papermaking method is preferably used. The fabric is inserted between the ultrafine fiber sheets obtained in this way or is attached to the back side of the sheets and subjected to a subsequent entangling process. It is also preferable that this substrate contains fibers that have different solubility in solvents than the ultrafine fibers that will become the product, and that can be extracted and removed by solvents during the process, thereby adjusting the texture. . Any type of fiber may be used as long as it has a different solvent solubility from the ultrafine fiber that will become the product, but if the ultrafine fiber that will become the product is PET, polyvinyl alcohol fibers that are soluble in hot water are preferred. The intertwined state of the present invention can be obtained by adjusting the intertwining method and conditions depending on the properties of the ultrafine fibers and the fabric. Using short fibers of about 3 to 10 mm, which are made into ultra-fine fibers, the number of additional twists is 100 to 100 as a fabric.
Fabric weight 20-100 with 1500T/m false twisted yarn
When using a plain weave fabric of about g/m ² , it is preferable to use a columnar water stream ejected from a pore nozzle as the entangling means. For example, the conditions are:
It is preferable that a columnar water stream with a jetting pressure of 1 to 30 kg/cm ² be applied to the front and back surfaces of the sheet without any corner from a multi-pore nozzle with a nozzle diameter of 0.05 to 0.5 mm. In addition to this method, a needle punch method, which has been widely used as a method for interlacing nonwoven fabric substrates of artificial leather, can also be used. Next, the entangled body is fluffed. As a means for fluffing, conventionally known means such as emery paper, cloth, a brush, etc. can be used, but fluffing with emery paper is preferable in terms of the quality of the naps. Fluffing can be done before or after impregnating the elastomeric polymer. When fluffing is performed before impregnation with the elastomer, in order to block the fluff from the elastomer before filling, the layer of fluff on the surface of the entangled body is coated with a glue that is insoluble in the elastomer solvent. agents, such as carboxymethyl cellulose (CMC), polyvinyl alcohol (PVA),
Alternatively, coating with a blend adhesive of CMC and PVA is also a preferable method. Furthermore, before coating the surface of the tangled body with a sizing agent, it is also preferable to impregnate the tangled body with a sizing agent before or after fluffing. By carrying out this operation, it becomes easier to handle the entangled body during the processing process of the artificial leather of the present invention, especially during the impregnation process with the elastic polymer, and after impregnating the elastic polymer, the sizing agent is extracted and removed. By doing so, there are advantages such that the artificial leather of the present invention has good flexibility. Water-soluble glue is preferable from the viewpoint of processability.
PVA, CMC, etc. are suitable. As a method for filling an entangled body with a polymer, there is a method of impregnating and coagulating an elastic polymer using a conventionally known dry coagulation method or wet coagulation method. The wet coagulation method, in which a solution of is applied to a substrate and then coagulated and precipitated in water or a mixed solvent of water and a solvent for the elastic polymer, imparts an appropriate microporous structure to the filled elastic polymer. preferable. When polyurethane is used as a preferred example of the elastic polymer, dimethylformamide (DMF) is preferably used as the solvent, and water or a water-DMF solvent is preferably used in the coagulation bath during wet coagulation. It is also good to add coloring agents such as pigments and dyes to polyurethane. When the impregnation and coagulation is completed, the above-mentioned sizing agent, that is, the sizing agent impregnated into the entangled body, the sizing agent coated on the surface of the entangled body, and the ultrafine fibers and solvent that constitute the product of the present invention mixed into the ultrafine fiber sheet. If there are fibers with different solubility, they are extracted and removed. Finally, this is dyed and the formed nap is preferably styled with a brush or the like to obtain the artificial leather of the present invention which has good lighting effects and excellent clothing properties. The present invention will be specifically explained below using Examples.
The measurement method used in the following examples was as follows. (1) Elongation: The elongation rate under a load of 1Kg/cm is JISL-
Values measured according to 1079C. (2) Flexibility: Value determined by JISL-1079 cantilever method. (3) Seam strength: Compliant with JISL-1093. Measurements were made under dry conditions and wet conditions (test piece immersed in water for 30 minutes). 30Kg/in or more was considered to be passed. (4) Tear strength: Compliant with JIS1079C pendulum method. A weight of 1.2Kg or more was considered a pass. (5) Sewing properties: Evaluated by seam puckering properties and sagging properties. Regarding the seam puckering property, two test pieces of width 10 cm and length of 30 cm were sewn together to form a curve with a curvature of 0.04 cm ^-1 to match the side lines of men's clothing, and the results were visually judged as shown in Table 1. It was evaluated using the following evaluation criteria. Regarding the sagging property, the samples were actually applied to the sewing process and evaluated according to the evaluation criteria shown in Table 1.

[Table] (6) Elongation recovery: It was found that phenomena such as elbows coming off during wear correspond well to the 10% constant elongation recovery rate of leather, so this value was used as a measure. The 10% constant elongation recovery rate was based on JIS1079-C. Example 1 A drawn yarn of 75d/36f polyethylene terephthalate (PET) is false-twisted at 3000T/m (false-twisted S twist, untwisted Z-twisted) using a normal false-twisting machine, and this false-twisted yarn is then 1000T/m in the Z direction even with a twisting machine
Added twist. This extra-twisted, false-twisted processed yarn was woven into a plain weave so that the weft density was 50 yarns/in for each yarn. The fabric weight was 50 g/m ² . When the resulting fabric was treated in hot water at 95°C for 30 minutes, it shrunk by 40% relative to its original length in both warp and weft. After drying, it was elongated using a pin tenter at a predetermined elongation rate for each direction and heat set at 180°C. The elongation of the obtained fabrics is shown in Table 2. Separately from textiles, by the method of patent application 1984-40519.
We made a 0.1d ultra-fine drawn PET thread, cut it to 3mm, and then made it with polyvinyl alcohol (PVA).
1d, 3mm cut yarns were mixed at a ratio of PET/PVA = 80/20, and a 100g/m ² mixed sheet was obtained by a papermaking method. The previously prepared woven fabric was placed on top of this mixed paper sheet, and the above-mentioned mixed paper sheet was further placed on top of this to form a three-layer sandwich sheet. A high-pressure water stream with a pressure of 15 kg/cm ² is sprayed onto this three-layer sheet from a nozzle with an orifice of 0.2 mmφ,
This operation was repeated four times on each side. As a result, in the three-layer sheet, the PET microfibers and the extra-twisted and false-twisted processed yarns of the microfibers and the fabric were sufficiently intertwined in three dimensions. Next, the surface of the entangled sheet was fluffed with a belt sander equipped with 240 mesh emery paper, and the substrate was impregnated with a 5% aqueous solution of polyvinyl alcohol (PVA), squeezed at a squeezing rate of 300%, and dried. The amount of PVA attached is based on the base fiber.
15% by weight (All adhesion percentages below are by weight.)
It was hot. After coating the fluffed surface layer with a thin layer of a concentrated solution of carboxymethylcellulose (CMC) using a doctor knife and drying it, it was impregnated with a 15% DMF solution of polyether-based polyurethane, squeezed with a mangle, and soaked in water at room temperature for 1 hour. Allow to solidify for minutes and dry. Thereafter, all the PVA fibers, PVA, and CMC in the base sheet were extracted and dried in hot water at 90°C for 30 minutes. Finally, the sheet-like material obtained in this way is
Stained with Sumikaron Rubine SE−2BL5%owf,
After reduction cleaning with 2 g of dechlorin and drying, the surface was lightly styled with a nylon brush. The obtained artificial leather had a suede-like surface with an extremely elegant writing effect, and had a firm and flexible feel that closely resembled that of natural suede. Furthermore, as shown in Table 3, the clothing properties are excellent in terms of seams, tear strength, and elongation recovery.
It also has excellent sewing properties, and the women's coats sewn using it have an extremely elegant feel and are well-tailored.

【table】

[Table] Comparative Example 1 The same gray fabric as in Example 1 was placed in hot water at 95°C.
The material subjected to the shrinkage treatment for 30 minutes was used as a fabric in the base sheet without heat setting, and processed in the same manner as in Example 1 to obtain artificial leather. The surface properties and texture of this product were not significantly different from the product obtained in Example 1, but as shown in Table 3, the elongation recovery was extremely poor and could not be put to practical use. Comparative Example 2 The same gray fabric as in Example 1 was stretched by 2% in both warp and warp using a pin tenter without shrinkage treatment to 180 mm.
Heat set at ℃. As a result, the elongation of the fabric is 2.3
%, latitude was extremely low at 3.4%. This was used as a fabric in the base sheet and processed in the same manner as in Example 1 to obtain artificial leather. The physical properties are shown in Table 3, and the leather made using such a woven fabric with low elongation had extremely poor sewing properties such as seam puckering and sagging properties. Comparative Example 3 Instead of false twisted yarn as the constituent yarn of the fabric,
A woven fabric was obtained with the same design as in Example 1 using 75d/36f PET straight yarn twisted in the 800T/mS direction. Artificial leather was made using this fabric in the same manner as in Example 1, but as shown in Table 3, the seam strength was particularly low and was not acceptable. Comparative Example 4 A gray fabric was made without any additional twisting of the false twisted yarn of the fabric of Example 1, and the warp was ^10.0 % after being subjected to shrinkage and heat setting treatment.
A fabric with an elongation of ^14.8 % was produced. Artificial leather was made using this fabric in the same manner as in Example 1, but as shown in Table 3, the tear strength was extremely low and was not acceptable. Comparative Example 5 A woven fabric was made with the same texture as in Example 1 using the same false twisted yarn as in Example 1 and an additional twist in the 2000T/mZ direction as the constituent yarn, and was subjected to shrinkage and heat setting treatment. Using this, artificial leather was made in the same manner as in Example 1. As shown in Table 3, this product had particularly low seam strength and was unacceptable. Example 2 PET 50d/36f 3000 times false twisting (twisting S,
Untwisting Z) Multifilament yarns are twisted in the Z direction at the number of twists shown in Table 4, with a warp of 60/in and a weft of 55.
It was made into a plain weave fabric with a density of 1/in. The basis weight is 40g/
It was ^m2 . This gray cloth was subjected to shrinkage treatment in hot water at 90℃ for 40 minutes (the shrinkage rate did not differ much depending on the number of additional twists), and was heated to 180℃ at the same elongation rate (warp 15%, latitude 17%).
The tension heat treatment was carried out in a pin tenter. The elongation of the obtained fabric was as shown in Table 4. Each of these woven fabrics was processed in the same manner as in Example 1 to obtain leather. These had a writing effect with a graceful surface, firm flexibility, and had extremely excellent clothing properties as shown in Table 4. As a comparative example, the physical properties of artificial leather made using a false twisted yarn having a number of additional twists outside the range of the present invention are also shown in the fourth example.
Although shown in the table, none of them were possible.

[Table] Example 3 50d/24d PET fibers were subjected to 2700T/m false twisting (S twisting, Z untwisting), one in the Z direction
Add twist to 1200T/m, and the other one is in the S direction.
Two types of yarns twisted at 1200 T/m with different twisting directions were prepared. When weaving using this raw yarn, the warp yarns are lined with Z additional twist yarns at a density of 55 yarns/in, and the weft yarns are alternately filled with two S additional twist yarns and two Z additional twist yarns, 55 yarns/in.
A plain weave fabric with a density of 45 g/m ² was made with a density of 45 g/m 2 . This was subjected to shrinkage treatment in hot water at 95°C for 25 minutes. The shrinkage rate of the fabric at this time was 15.0% in the warp and ^22.0 % in the weft.
It was hot. In addition, the pin tenter has a warp of 5.0% and a latitude of ^7.0 %.
It was elongated and heat set at 180°C. The obtained elongation is
The latitude was ^11.0 % and the latitude was ^15.0 %. Leather was made using this fabric in the same manner as in Example 1. Similar to the product obtained in Example 1, both surface properties and texture were extremely excellent. The physical properties of leather are: Seam strength: Dry ^41.5 Kg/in Wet ^39.9 Kg/in Tear strength: ^2.1 Kg 10% constant elongation recovery rate: 1 time ^91.8 % 5 times ^87.3 % Seam It had extremely excellent clothing properties, with puckering properties: 〇 sagging properties: 〇 and flexibility: 46 mm. Example 4 0.15d, 5 of PET obtained by direct spinning method
The paper is made by mixing 80 parts of ultra-fine short fibers with a mm cut and 20 parts of PVA short fibers with a 1d and 3 mm cut, and has a basis weight of 100.
A sheet of g/m ² was obtained. 60 parts of ultrafine short fibers of 0.2 d, 5 mm cut length of nylon 6 and 1 d, 3 mm cut length of PVA short fibers obtained by the same direct spinning method.
A sheet with a basis weight of 120 g/m ² was obtained by mixing and paper-making 40 parts. The same fabric as No. 1 of Example 1 was inserted between these two sheets, and processed in the same manner as in Example 1 until dyeing. For dyeing, use disperse dye on the PET side and dye it with nylon 6.
The hair was dyed in two baths with acid dye, and the front and back sides were lightly brushed and finished. The artificial leather thus obtained was a suede-like artificial leather with excellent surface properties and a so-called reversible effect since the front and back surfaces were dyed in a different color. The physical properties of leather are: Seam strength: Dry ^43.7 Kg/in Wet ^41.2 Kg/in Tear strength: ^2.3 Kg 10% constant elongation recovery rate: 1 time ^87.3 % 5 times ^85.5 % Seam It had extremely excellent clothing properties, with puckering property: 0 and sagging property: 0. Example 5 False twisting of 70d/24f nylon 6 (2700T/
m, twisted Z untwisted S) multi-filament with additional twist in 600T/mS direction, warp 50/in, weft 55
It was woven into a plain weave with a density of 1/in. The basis weight is 52
g/ ^m2 . On the other hand, 0.15d nylon 6 was produced using the direct spinning method.
and cut it into 90 parts of short fibers of 3 mm.
An ultrafine fiber sheet with a basis weight of 110 g/m ² was made by mixing 10 parts of PVA short fibers cut 1 d.3 mm and using a paper-making method. The nylon 6 fabric prepared earlier was shrink treated with 80℃ hot water and heat set using a pin tenter.
An elongation of ^16.5 % in longitude and ^17.5 % in latitude was given. This woven fabric was sandwiched between the two ultrafine fiber sheets, treated with a columnar liquid, processed into leather in the same manner as in Example 1, dyed with an acid dye, and then straightened. The clothing properties of this leather are: Seam strength: Dry ^35.7 Kg/in Wet ^30.6 Kg/in Tear strength: ^1.9 Kg 10% constant elongation recovery rate: 1 time ^85.9 % 5 times ^82.7 % It was extremely excellent, with scorching resistance: 〇 and seam puckering resistance: 〇. Furthermore, the surface had an elegant writing effect, and the texture was soft and full. Example 6 Average fineness 0.01d obtained by melt blowing method
A non-woven web with a basis weight of 80 g/m ² made of accumulated PET was mixed with 90 parts of ultra-fine PET fibers of 0.1 d, 5 mm cut and 1 d with a woven fabric of Example 1 No. 1 having a basis weight of 50 g/m ² inserted between them. An artificial leather was produced in the same manner as in Example 1 by placing it on a mixed paper sheet with a basis weight of 140 g/m ² consisting of 10 parts of short PVA fibers cut into 5 mm. Since the obtained leather was made of melt-blown PET fibers, it had a baggy surface with extremely dense naps on its surface, and was highly flexible. For leather items: Seam strength: Dry ^38.6 Kg/in Wet ^37.0 Kg/in Tear strength: ^2.5 Kg 10% constant elongation recovery rate: 1 time ^86.4 % 5 times ^83.6 % Seam It had extremely excellent clothing properties, with puckering property: 0 and sagging property: 0.

Claims (1)

[Scope of Claims] 1 Consists of an intertwined body in which ultrafine fibers of 0.5 denier or less cover at least one entire surface of the fabric and are three-dimensionally intertwined with the fabric, and fluff of the ultrafine fibers is formed on the surface of the entangled body. In a sheet-like article in which the interstitial spaces of the intertwined body are filled with an elastic polymer, the fibers constituting the woven fabric have a single yarn fineness of 4 denier or less and are twisted at a rate of 100 to 1500 T/m. 1 of the sheet-like material made of multifilament
A suede-like artificial leather characterized by an elongation of 3 to 20% in the warp direction and 5 to 40% in the weft direction under a load of Kg/cm. 2. Claim 1, characterized in that the multifilaments constituting the fabric are false twisted yarns.
Suede-like artificial leather as described in section. 3. The suede-like artificial leather according to claim 1, wherein the fabric has a basis weight of 20 to 100 g/ ^m2 . 4. The suede-like artificial leather according to claim 1, wherein the texture of the fabric is a plain weave.