Artificial pile leather and method for manufacturing artificial pile leather

Abstract

To provide an artificial piloerection leather having both excellent stretchability, and excellent appearance.SOLUTION: There is used an artificial leather substrate which is a laminate of a thermoplastic elastomer layer composed of a thermoplastic elastomer as a main constituent, and a non-elastic fiber layer composed of an entangled body of non-elastic ultrafine fibers having an average fineness of less than 0.5 dtex as a main constituent arranged on one face or both faces of the thermoplastic elastomer layer, where the thermoplastic elastomer layer is penetrated in a thickness direction by a part of non-elastic fibers which forms the non-elastic fiber layer to be combined, and a thickness percentage of the thermoplastic elastomer layer in a section in a thickness direction is 5-50%.SELECTED DRAWING: Figure 1

Claims

1. A laminate comprising a thermoplastic elastomer layer mainly composed of a thermoplastic elastomer, and an inelastic fiber layer mainly composed of an entanglement of inelastic fibers having an average fineness of less than 0.5 dtex, disposed on one or both sides of the thermoplastic elastomer layer, The thermoplastic elastomer includes a polystyrene-based thermoplastic elastomer. The thermoplastic elastomer layer is integrated with some of the inelastic fibers forming the inelastic fiber layer by penetrating them in the thickness direction. In the cross-section in the thickness direction, the thickness ratio of the thermoplastic elastomer layer is 5 to 50%. A napped artificial leather characterized by having a surface in which the non-elastic fiber layer has been treated to create a napped surface.

2. The artificial napped leather according to claim 1, wherein the thermoplastic elastomer layer is a layer formed by the partial fusion of the fibers of the thermoplastic elastomer.

3. The artificial napped leather according to claim 1, wherein the thermoplastic elastomer layer comprises a film-like thermoplastic elastomer.

4. The artificial napped leather according to any one of claims 1 to 3, wherein the non-elastic fiber is a short fiber with an average fiber length of 100 mm or less.

5. The artificial napped leather according to any one of claims 1 to 4, further comprising a water-based polyurethane impregnated into the interior.

6. The artificial napped leather according to any one of claims 1 to 5, wherein the non-elastic fiber is a polyester fiber.

7. The artificial napped leather according to any one of claims 1 to 6, wherein the non-elastic fiber layer is arranged on both sides of the thermoplastic elastomer layer.

8. A step of preparing a first fiber web formed from a first ultrafine fiber generating type fiber for forming thermoplastic elastomer fibers, A step of preparing a second fiber web formed from a second ultrafine fiber generating type fiber for forming non-elastic fibers, A step of forming a laminated web by laminating the second fiber web onto one or both sides of the first fiber web, The process involves forming an entangled fiber sheet by performing a three-dimensional entanglement process on the laminated web, thereby penetrating a portion of the second ultrafine fiber-generating fiber through the first fiber web and integrating the first fiber web and the second fiber web. The process of forming a heat-shrinkable fiber sheet by heat-shrinking the aforementioned entangled fiber sheet, A step of forming a fibrous entanglement between a thermoplastic elastomer layer mainly composed of thermoplastic elastomer fibers and an inelastic fiber layer mainly composed of inelastic fibers by subjecting the first ultrafine fiber generating type fiber and the second ultrafine fiber generating type fiber, which form the heat-shrinkable fiber sheet, to an ultrafine fiber treatment, A step of softening or melting the thermoplastic elastomer fibers that form the fiber entanglement, thereby partially fusing the thermoplastic elastomer fibers, or forming a film in which the thermoplastic elastomer fibers are melted and fused, The process includes forming a surface on the non-elastic fiber layer by performing a pile-up treatment, A method for producing artificial leather with a raised pile, characterized in that the thermoplastic elastomer includes a polystyrene-based thermoplastic elastomer.

9. The method for producing a pile artificial leather according to claim 8, further comprising the step of impregnating the heat-shrinkable fiber sheet or the fiber entanglement body with a polyurethane aqueous emulsion and then drying it to impregnate the interior with aqueous polyurethane.

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