KR100931955B1 - Manufacturing method of artificial leather with excellent elasticity - Google Patents

Abstract

The present invention relates to a method of manufacturing artificial leather with excellent elasticity, characterized in that the microfibers are mixed with bi-soluble fibers and bicomponent composite fibers when manufacturing nonwoven fabrics interwoven in three dimensions.

The artificial leather of the present invention uses the dissolving fibers having dissolvability of 5 to 50% by weight relative to the total weight of the nonwoven fabric and 95 to 50% by weight of the bicomponent composite fiber composed of the extracting component and the fiber forming component to the total weight of the nonwoven fabric. After preparing the nonwoven fabric, the impregnated polyurethane elastic body to the nonwoven fabric may be prepared by eluting the extraction components of the dissolved fibers and bicomponent composite fibers in the nonwoven fabric, and then buffing.

Artificial leather of the present invention is excellent in elasticity is useful as a material for clothing, gloves and boots.

Artificial leather, elasticity, gloves, polyurethane, elastomer, content, elongation recovery.

Description

Method of manufacturing artificial leather with excellent elasticity {Methed of manufacturing artificial leather with excellent elasticity}             

1 is a schematic diagram showing various length units applied in calculating the width recovery rate;

The present invention relates to a method of manufacturing artificial leather excellent in elasticity, and more particularly to a method of manufacturing artificial leather useful in materials such as clothing, gloves and boots for excellent elasticity.

Artificial leather composed of a nonwoven fabric in which microfibers are intertwined in three dimensions and a polyurethane resin (polyurethane elastomer) impregnated in the nonwoven fabric has a soft texture and unique appearance similar to that of natural leather, and thus is widely used as a material for clothing or gloves. have.

Recently, the development of artificial leather with high functionality has been actively progressed beyond the steps of imitating the soft texture and unique appearance peculiar to the existing natural leather. In particular, there is a demand for artificial leather having excellent elasticity (stretch recovery) during use so as to improve the fit and to be suitable for use in areas with a large number of bends.

The stretch recovery force of artificial leather is due to the polyurethane elastomer, and thus, when the polyurethane is in a completely continuous phase, it is easily stretched up to several hundred percent due to its characteristics and can be almost completely recovered. However, in the case of artificial leather, polyurethane serves as a filler between the ultrafine fibers and exists in the form of a sponge with many fine and uneven holes. Due to this structure, strength is concentrated in the thin and weak areas of the polyurethane during elongation deformation and there is a limit to full recovery because the recovery of the stretched nonwoven fabric is insufficient to recover the stretched nonwoven fabric even if some breakage or breakage does not occur. . In addition, the smaller the filling amount of polyurethane, the thinner and weaker the area of the sheet, so the resilience of recovery becomes smaller. Therefore, in order to improve the stretch recovery power, it is preferable to fill the polyurethane content in as many and continuous structures as possible.

Conventional techniques for imparting elasticity to artificial leather include (i) a method of inserting or removing a scrim fabric into artificial leather, (ii) a method of coating a resin on artificial leather, and (i) manufacturing a nonwoven fabric. Polyurethane fibers (spandex yarn), etc., and a method of mixing elastic fibers, and (i) low density of the nonwoven fabric when manufacturing the nonwoven fabric to increase the voids in the nonwoven fabric and increase the concentration of the polyurethane impregnation solution to increase the polyurethane elastomer. Methods of increasing the impregnation amount of are known.                         

Specifically, as a first method of inserting or removing a scrim fabric into artificial leather, Japanese Patent Laid-Open No. 2000-54250 discloses a fabric in which at least one quarter or more of the weft yarn is a polyurethane elastic fiber is 0.5 denier or less. Proposes a method of manufacturing artificial leather having high elasticity by impregnating a water-based polyurethane on a sheet made by microscopic fibers and three-dimensional entangled fibers. Japanese Unexamined Patent Publication No. 2000-336581 discloses an ultrafine fiber having a length of 0.8 denier or less and a length of 20 mm or more. A method of fabricating stretchable artificial leather by impregnating a polymer binder by entangled a woven web composed of a web and a polyester latent crimping fabric having a stretch potential of at least 20% in length and / or width direction. In addition, Japanese Patent Application Laid-Open No. 2003-13368 discloses a sheet made by interweaving a textile web of 0.9 decitex or less and a knitted fabric composed of lecture yarns and high shrink yarns together to give an ultra-fine, polymer elastomer, and hair treatment process, and to produce the sheet. And / or a method for producing an artificial leather having excellent elasticity by grinding and removing the knitted fabric after shrinking in the width direction. In Japanese Patent Laid-Open No. 2003-89984, a microfiber web of 0.9 decitex or less and a knitted fabric of 700 T / M or more are interwoven to shrink in a benzyl alcohol or phenylethyl alcohol emulsion, impregnated with polyurethane, and then buffing the knitted fabric. Slicing method discloses a method for producing artificial leather having excellent elasticity of 15% or more in elongation and / or width direction and 80% or more in elongation recovery.

However, the above-described conventional technique of inserting or removing a scrim fabric into artificial leather is difficult to uniformly entangle the knitted fabric and the nonwoven web with excellent elasticity, and even though the elastic recovery rate of the scrim fabric is excellent, the artificial leather substrate Since it is inserted into the resin, there is a limit in exerting an excellent recovery rate, especially in high artificial leather. The method of removing the scrim after the heat treatment or emulsion treatment after inserting the scrim does not have sufficient shrinkage effect in addition to the difficulty of uniformly interwoven the woven fabric and the nonwoven web, and the cost of inserting and removing the scrim and the manufacturing cost of the scrim are added. There is a big disadvantage.

As a second method of coating a resin on artificial leather, Japanese Laid-Open Patent Publication No. 2002-348784 discloses coating of at least one surface of artificial leather composed of ultrafine fiber entangled body of less than 0.9 decitex and a polymer elastomer with a polymer elastomer and then 20 ~ 20% of breaking strength. A method of stretching in the length and / or width direction with 90% strength is disclosed. In Japanese Patent Laid-Open No. 11-100779, a fiber bubble having a weight of 50 to 200 g / m 2 and a constituent fiber of polytrimethylene terephthalate is disclosed. It discloses a method for producing synthetic leather coating at least one side of synthetic resin.

However, the above-mentioned conventional technique of coating a resin on at least one side of artificial leather is not suede-type artificial leather and lacks the specificity of the technology in the general concept that elastic coating can be expressed by coating resin in the case of artificial leather coating products. Do.

As a third method of mixing elastic fibers when manufacturing nonwoven fabrics, U.S. Patent No. 4,835,012 and Korean Laid-Open Patent Publication No. 1999-76034 produce a nonwoven fabric using a mixture of polyurethane yarn, and then use the same to manufacture a stretchable artificial leather. We publish.

However, since the method uses expensive elastic fibers, there is a problem in that the manufacturing cost is increased, and the synergistic effect is insufficient.

Meanwhile, Korean Patent Application No. 2003-71668 discloses a fourth method of providing elasticity to artificial leather by increasing the amount of polyurethane filling by deepening the fiber orientation structure at low density in the nonwoven fabric manufacturing step.

However, in the fourth method, since inter-fiber entanglement is relatively weak compared to normal or high-density nonwoven fabrics in the case of low-density nonwoven fabrics, non-woven fabrics and weights become non-uniform, and may be easily deformed by tension received during the process after the nonwoven fabric. There is a limit to lowering the density of nonwoven fabrics due to the characteristics of the facility. In addition, the method of increasing the amount of polyurethane filling by increasing the concentration of the polyurethane impregnation liquid may increase the viscosity rapidly as the concentration of the impregnating liquid increases, which may be unreasonable to facilities such as a supply pump, and the polyurethane concentration is different during regular production. According to the replacement of the impregnation solution, there is a disadvantage that the production yield is lowered.

It is an object of the present invention to solve the problems caused by the low density nonwoven fabric by using a mixture of dissolving fibers when manufacturing the nonwoven fabric to improve the form stability of the nonwoven fabric to increase the polyurethane content in artificial leather even under ordinary polyurethane impregnation conditions The elasticity is to produce an artificial leather significantly improved than the conventional product.

The present invention is to manufacture a non-woven fabric constituting artificial leather by dissolving fibers and two-component composite yarns to greatly improve the elasticity of artificial leather.

The present invention is a co-polyester fiber which is a dissolvable soluble fiber that can be dissolved in an aqueous alkali solution in the sea component elution process, which is one of the existing artificial leather manufacturing process, to compensate for the disadvantages of the existing method in manufacturing the nonwoven fabric (hereinafter, Non-woven fabric by mixing the fine fibers of 0.5 denier or less and non-woven fabric in the manufacturing process of the nonwoven fabric and needle punching to produce the nonwoven fabric. It is not limited to the limit of the nonwoven fabric manufacturing equipment and also contains dissolved fiber, so the density of the nonwoven fabric is not low, so it has morphological stability, and it is not necessary to increase the filling amount by increasing the concentration of the polyurethane impregnation solution. Of equipment such as supply pump is not overwhelming and production yield decreases when impregnation liquid is replaced An object of the present invention is to provide a method of manufacturing an artificial leather having excellent elasticity that can improve a problem.

In order to achieve such a problem, a method of manufacturing artificial leather having excellent elasticity, using dissolving fibers having dissolvability of 5 to 50% by weight relative to the total weight of a nonwoven fabric, is composed of an extract component and a fiber forming component. After manufacturing the nonwoven fabric using the bicomponent composite fiber 95 ~ 50% by weight relative to the total weight of the nonwoven fabric, after impregnating the polyurethane elastomer in the nonwoven fabric and eluting the extraction components of the dissolved fibers and bicomponent composite fibers in the nonwoven fabric, Characterized in buffing.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

The present invention uses 5 to 50% by weight of dissolving fibers having dissolvability and non-woven fabric using 95 to 50% by weight of the total weight of the nonwoven fabric using a bicomponent composite fiber composed of an extract component and a fiber forming component. After the preparation, impregnated with a polyurethane elastomer in the nonwoven fabric, eluting the extraction component of the dissolved fiber and bicomponent composite fibers in the nonwoven fabric, and then buffing to produce artificial leather.

The fiber-forming component constituting the two-component composite fiber has a single yarn fineness of 0.5 denier or less after the extraction component is eluted, and the component is polyethylene terephthalate or the like.

On the other hand, each of the extract component constituting the two-component composite fibers and the dissolved fibers used in the production of the nonwoven fabric are polyethylene terephthalate, which is a main component, polyethylene glycol, polypropylene glycol, 1-4-cyclohexane dicarboxylic acid, and 1-4-cyclo. Hexanedimethanol, 1-4-cyclohexanedicarboxylate, 2-2-dimethyl-1,3-propanediol, 2-2-dimethyl-1,4-butanediol, 2,2,4-trimethyl-1, Alkali-soluble co-polyester which 3-propanediol, adipic acid, a metal sulfonate containing ester unit, or a mixture thereof is copolymerized.

More preferably, each of the extract component and the dissolved fiber is a copolymerized polyester obtained by adding 4 to 20% by weight of polyethylene glycol having a number average molecular weight of 8,000 or more to a copolymerized polyester having 3 to 15 mol% of a metal sulfonate-containing ester unit. It is good to be

The reason why the dissolved fiber is an alkali dissolvable component as described above is to elute and remove the dissolved fiber in the process of eluting the extract component in the two-component composite yarn during the manufacture of artificial leather.

The composition of the dissolved fiber and the extract component may be the same as or different from each other.

In addition, in order to make the weight, thickness, density, etc. of the nonwoven fabric uniform, two or more kinds of dissolved fibers having different compositions may be applied together.

The dissolved fibers are preferably in the form of short fibers having a length of 20 mm or more and single yarn fineness of 10 denier or less. When the length is less than 20 mm, carding may become difficult in manufacturing the nonwoven fabric, and when the single yarn fineness exceeds 10 denier, the opening process and the carding process may be difficult in manufacturing the nonwoven fabric.

On the other hand, the two-component composite yarn 10 ~ 60% by weight: 40 ~ 90% by weight, preferably 30 ~ 50% by weight: 50 ~ 70% by weight of the fiber-forming component and the extraction component after supplying in the composite spinning device It is prepared by complex spinning in a conventional manner.

The fiber-forming component has a single yarn fineness of 0.5 denier or less after the extraction component is eluted.

In the production of nonwoven fabrics, the weight ratio of dissolved fibers: bicomponent composite yarns is 5 to 50% by weight: 50 to 95% by weight, preferably 10 to 40% by weight: 60 to 90% by weight.

If the dissolved fiber is less than 5% by weight, there is a disadvantage that the density reduction effect caused by the removal of the dissolved fiber in the elution process is too weak.If the dissolved fiber is more than 50% by weight, the density reduction effect is so large that the weight is the most Even if a heavy nonwoven fabric is manufactured, there is a problem in that the density is drastically reduced and morphological deformation occurs, and thus, many fibers are not completely dissolved in the elution process.

The bicomponent composite yarn and the dissolved fiber are opened, mixed, carded, and cross-wrapped to prepare a web and needle punched to produce a nonwoven fabric. When manufacturing the nonwoven fabric by mixing the dissolve fibers as in the present invention, it is possible to maintain the needle punching number per unit area like the regular nonwoven fabric, so that not only can solve various problems caused when using the conventional low density nonwoven fabric, but also to reduce the density of the unit The reason why the number of needle punches per area was inevitably reduced is that there is little inter-fiber entanglement, which can improve the disadvantage of the lack of elongation recovery rate.

The nonwoven fabric is impregnated with a polyurethane elastomer impregnation solution after binder treatment with 5-20% polyvinyl alcohol aqueous solution. At this time, the polyurethane content is less than 40% by weight. The reason for this is to reduce the occurrence of polyurethane immersion phenomenon on the surface of artificial leather, which may occur when the amount of polyurethane filling is large, and to reduce the manufacturing cost by reducing the polyurethane content of the final product. In addition, since the non-woven fabric containing the dissolving fiber, the same polyurethane concentration is less than the conventional low-density non-woven fabric has less voids in the non-woven fabric than the polyurethane content is inevitably low.

Then, in the elution process to remove the extracted components of the two-component composite yarns, it is removed by dipping or pad steaming with an aqueous alkali solution to remove not only the extract components of the two-component composite yarns, but also dissolved fibers, and then sliced or buffed, dyed and finished to be wide and / or Artificial leather having a recovery rate of 90% or more at 30% elongation in the longitudinal direction is manufactured. In addition to the above process may include shrinkage process or additional buffing and post-processing process, etc. The present invention does not specifically limit the order of the process.

The artificial leather manufactured according to the present invention has excellent elasticity as the recovery rate in the width direction and the longitudinal direction of 90% or more at 30% elongation measured by the following measuring method. Elasticity can be seen as a series of stretches and recovery.

It can be said that the elasticity of the nonwoven fabric is small and easily stretched when it is stretched, and the recovery force of the polyurethane elastic body is well recovered when it is recovered.

30% Xinjiang Widthwise Elongation recovery

  -Measuring equipment; Instron tensile tester

  - Measuring conditions ; Tensile Method: Repeated Constant Velocity Stretch Method (KS K 0352 Method Application)

               Gripping length of the sample: 8 cm

               Tensile Speed: 300mm / min

               Repeated elongation to recovery elongation range: 0 ~ 30% (0 ~ 2.4cm)

               Number of repeated loads: 5 consecutive recovery

  - How to measure

     (1) Specimen of specimen: 2.5cm in length x 20cm in width

     (2) After marking the sample at a distance L0 of 8 cm according to the measurement conditions,

      Grasp and stretch to 30% (L = 2.4cm) and recover to 0% continuously

      Repeat five times.

     (3) The final part of the marked area after being left for 2 hours after the test.

       Measure the length L '.                     

     (4) Evaluate elongation recovery at 30% elongation according to the following formula.

[In the above formula, L0 is the initial length of the sample (8cm), L is the sample length at the time of 30% elongation (2.4cm), and L '= the length of the sample after leaving it for 2 hours after giving the repeated load five times (recovery There is no stretched length left).]

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

However, the present invention is not limited by the following examples.

Example  One

Spinning and stretching the copolyester with 5 mol% of the metal sulfonate-containing polyester unit in polyethylene terephthalate as a main component, and through the crimping and cutting process, a single fiber having 3.5 denier fineness and 51 mm in length was produced. Used as soluble fiber. 70 parts by weight of polyamide-6 as an ultrafine component, 30 parts by weight of the copolymerized polyester as an extraction component, spin-stretched and subjected to a crimping and cutting process, 3.5 denier single yarn fineness and 51 mm long island-like composite short fibers (after sea component elution) Single yarn fineness: 0.07 denia) was prepared and used as a two-component composite yarn. The dissolved fibers and the two-component composite yarns are opened and mixed at a ratio of 10 parts by weight: 90% by weight, a web is formed through a carding-cross lapping process, and needle punched to carry out a unit weight of 742 g / m 2 and afterwards. A nonwoven fabric of 3.38 mm and width 1700 mm was prepared. The nonwoven sheet was then padded and dried with an aqueous 10% polyvinyl alcohol solution to give 10% by weight to the fiber weight. Immediately thereafter, a polyether-type polyurethane elastomer was diluted in dimethylformamide (DMF) to prepare an impregnation solution with a concentration of 8%. After dipping the composite sheet therein, the polyurethane elastomer was solidified in an aqueous solution and then 70 ° C. It was washed with water in an aqueous solution of and the polyvinyl alcohol polymer was completely removed before drying. The impregnated fabric composed of the fiber and polyurethane was continuously treated in a 10% aqueous solution of caustic soda at a temperature of 100 ° C. to completely remove the dissolved fiber and the extracted components in the two-component composite yarn and to make the fiber fine so that only the island component remained. After slicing and dividing into two, the roughness # 300 sandpaper was applied to buff the thickness to 0.68mm, thereby cutting a part of the ultrafine fibers to raise and express the wool. Next, the dyes were fastened with an acid dye having excellent color fastness in a high pressure rapid dyeing machine, fixed, washed, and dried. Finally, suede-type composite artificial leather was manufactured through a softener and an antistatic agent treatment process. The physical properties of the artificial leather manufactured as described above were evaluated by the method described above, and the results are shown in Table 3 below.

Example  2 to Example  3 and Comparative Example  1 to Comparative Example  3

A composite artificial leather suede was prepared in the same manner as in Example 1 except that the fiber blend, unit weight and thickness of the manufactured nonwoven fabric were changed as shown in Table 1, and the physical properties were evaluated by the method described above. The results are shown in Table 2 below.

Manufacture conditions division Dissolved fiber / 2 component composite yarn weight ratio (%) Non-woven Polyurethane Concentration (%) Unit weight (g / ㎡) Thickness (mm) Density (g / ㎠) Example 1 10/90 742 3.38 0.220 10 Example 2 30/70 737 3.40 0.217 12 Example 3 50/50 725 3.35 0.216 14 Comparative Example 1 0/100 765 4.35 0.176 10 Comparative Example 2 0/100 751 4.41 0.170 12 Comparative Example 3 0/100 783 4.43 0.177 14

Example  4

8 wt% of polyethylene glycol having a number average molecular weight of 16,000 was added to a copolyester copolymerized with 4 mol% of a metal sulfonate-containing polyester unit in polyethylene terephthalate as a main component to spin-stretch and modify the copolyester. After the process, single yarn fineness was 3.5 denier and 51 mm in length, short fibers were prepared and used as dissolved fibers. 70 parts by weight of polyamide-6 as an ultrafine component, 30 parts by weight of the copolymerized polyester as an extraction component, spin-drawn and subjected to a crimping and cutting process, a single yarn fineness 3.5 denier and a 51 mm long island-like composite short fiber (after sea component elution) Single yarn fineness: 0.07 denia) was prepared and used as a two-component composite yarn. The dissolved fibers and the two-component composite yarns are mixed by opening at a ratio of 10 parts by weight: 90% by weight, a web is formed through a carding-cross lapping process, and needle punched to carry out a unit weight of 550 g / m 2, even after A nonwoven fabric of 2.11 mm and width of 1700 mm was prepared. The nonwoven sheet was then padded and dried with a 10% aqueous polyvinyl alcohol solution to give 10% by weight to the fiber weight. Immediately thereafter, a polyether-type polyurethane elastomer was diluted in dimethylformamide (DMF) to prepare an impregnation solution having a concentration of 12%. After dipping the composite sheet therein, the polyurethane elastomer was solidified in an aqueous solution and then 70 ° C. It was washed with water in an aqueous solution of and the polyvinyl alcohol polymer was completely removed before drying. The impregnated fabric composed of the fiber and polyurethane was continuously treated in a 10% aqueous solution of caustic soda at a temperature of 100 ° C. to completely remove the dissolved fiber and the extracted components in the two-component composite yarn and to make the fiber fine so that only the island component remained. By applying roughness # 240 sandpaper to buff the thickness to 1.05mm, a part of the ultrafine fibers were cut and raised to express the wool. Then, after dyeing in a high-speed rapid dyeing machine with a disperse dye, fixed washing and dried. Finally, suede-type composite artificial leather was manufactured through a softener and an antistatic agent treatment process. The physical properties of the artificial leather manufactured as described above were evaluated by the method described above, and the results are shown in Table 3 below.

Example  5 to Example  6 and Comparative Example  4 to Comparative Example  6

A composite artificial leather suede was prepared in the same manner as in Example 1 except that the fiber blend, unit weight and thickness of the manufactured nonwoven fabric were changed as shown in Table 2, and the physical properties thereof were evaluated by the method described above. The results are shown in Table 3 below.

Manufacture conditions division Dissolved fiber / 2 component composite yarn weight ratio (%) Non-woven Polyurethane Concentration (%) Unit weight (g / ㎡) Thickness (mm) Density (g / ㎠) Example 4 10/90 550 2.11 0.235 10 Example 5 30/70 554 2.06 0.241 12 Example 6 50/50 562 2.10 0.232 14 Comparative Example 4 0/100 593 2.94 0.202 10 Comparative Example 5 0/100 605 2.98 0.203 12 Comparative Example 6 0/100 612 3.07 0.199 14

Physical property results division Polyurethane content (% by weight) Width recovery at 30% elongation (%) Example 1 48.6 91.5 Example 2 53.1 93.0 Example 3 59.2 95.5 Example 4 43.5 90.3 Example 5 47.6 91.3 Example 6 52.9 93.6 Comparative Example 1 36.1 78.2 Comparative Example 2 39.3 81.7 Comparative Example 3 43.3 84.4 Comparative Example 4 34.9 76.9 Comparative Example 5 37.8 78.8 Comparative Example 6 41.2 82.0

In the present invention, since the nonwoven fabric is manufactured by mixing the dissolved fibers, the degree of entanglement between the fibers is increased compared to the low density nonwoven fabric, so that the recovery rate is excellent.

In addition, the present invention is to ensure a stable quality by reducing the non-woven fabric and the non-uniformity and weight of the non-woven fabric after the disadvantage of the low density non-woven fabric.

In addition, the present invention is because the dissolved fiber is eluted, the dissolution rate is high and the polyurethane content is high, so there is no need to increase the amount of filling by increasing the concentration of the polyurethane impregnation solution, so there is no difficulty in equipment such as a supply pump by increasing the viscosity of the polyurethane. It is possible to personalize the disadvantage of lowering the production yield when the impregnation solution is replaced.

Claims (7)

Non-woven fabrics were prepared by using dissolving fibers having dissolvability of 5-50% by weight relative to the total weight of the nonwoven fabric and using 95-50% by weight of the bicomponent composite fibers composed of the extracting component and the fiber-forming component. Next, after impregnating the polyurethane elastomer in the nonwoven fabric, eluting the extraction components of the dissolved fibers and the bicomponent composite fibers in the nonwoven fabric, and then buffing, characterized in that the manufacturing method of artificial leather with excellent elasticity. The method for producing artificial leather having excellent elasticity according to claim 1, wherein the fiber-forming component constituting the bicomponent composite fiber has a single yarn fineness of 0.5 denier or less after eluting the extract component. The method for producing artificial leather having excellent elasticity according to claim 1, wherein the fiber-forming component constituting the bicomponent conjugate fiber is polyethylene terephthalate or polyamide. A polyethylene glycol, polypropylene glycol, 1-4-cyclohexane dicarboxylic acid, 1-4-cyclohexanedimethanol, and 1-4-cyclo to polyethylene terephthalate, each of which is a dissolved fiber and an extract component, respectively. Hexanedicarboxylate, 2-2-dimethyl-1,3-propanediol, 2-2-dimethyl-1,4-butanediol, 2,2,4-trimethyl-1,3-propanediol, adipic acid, A method for producing an artificial leather having excellent elasticity, characterized in that a metal sulfonate-containing ester unit or a mixture thereof is copolymerized. The method for producing an artificial leather having excellent elasticity according to claim 1, wherein the dissolved fiber and the extract component are alkali soluble. The method for producing artificial leather having excellent elasticity according to claim 1, wherein the length of the dissolved fiber is 20 mm or more and single yarn fineness is 10 denier or less. The method of manufacturing an artificial leather having excellent elasticity according to claim 1, wherein the recovery rate in the width direction of the artificial leather is 30% or more at 30% elongation.

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