Artificial leathers

• US 4,434,205 A
• Filed: 07/22/1982
• Issued: 02/28/1984
• Est. Priority Date: 11/01/1979
• Status: Expired due to Term

• Current Assignee: Toa Nenryo Kogyo Kabushiki Kaisha
• Original Assignee: Toa Nenryo Kogyo Kabushiki Kaisha
• Inventors: Fujii, Shigeo, Mikami, Takashi, Okano, Shuji, Ikeda, Tokuzo
• Primary Examiner(s): Bell, James J.
• Application Number:
  US06/401,290
• Time in Patent Office: 586 Days
• Field of Search: 428/218, 428/219, 428/220, 428/233, 428/234, 428/235, 428/284, 428/286, 428/287, 428/290, 428/297, 428/298, 428/299, 428/300, 428/301, 428/340, 428/904, 428/423.1
• US Class Current: 428/218
• CPC Class Codes: B23Q 3/1543 using electromagnets
• CPC Class Codes: Y10S 428/904 Artificial leather
• CPC Class Codes: Y10T 428/24992 Density or compression of components
• CPC Class Codes: Y10T 428/27 Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
• CPC Class Codes: Y10T 428/31551 Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
• CPC Class Codes: Y10T 442/2008 Fabric composed of a fiber or strand which is of specific structural definition
• CPC Class Codes: Y10T 442/2377 Improves elasticity
• CPC Class Codes: Y10T 442/3813 Coating or impregnation contains synthetic polymeric material

Abstract

An artificial leather is made by impregnating a special nonwoven web substrate with an elastic polymer material. In another embodiment the substrate comprises a nonwoven fabric laminated to a woven or nonwoven fabric.

Claims

1. An artificial leather comprising a nonwoven fabric and a polymer filling the interstices of said nonwoven fabric, said nonwoven fabric consisting essentially of stacked and intertwined melt-blown long fibers forming thin intertwined layers extending between one surface of said nonwoven fabric or a part thereof and the other surface or a part thereof.

2. The artificial leather according to claim 1 wherein the polymer is an elastomer or elastomeric polymer.

3. The artificial leather according to claim 1 wherein the polymer is selected from the groups consisting of synthetic rubber such as polyurethane, NBR and SBR, polyvinyl chloride, polyamide resins such as nylon 6, nylon 66 and methoxymethylated polyamine resins, acrylic resins and copolymers thereof.

4. The artificial leather according to claim 1, 2 or 3 wherein the elastic or elastomeric polymer is present in an amount of from about 5 to 150% by weight based on the weight of the nonwoven fabric.

5. The artificial leather according to claim 1 wherein the nonwoven fabric is formed of fibers having a diameter of about 0.1 to about 30 microns.

6. The artificial leather according to claim 1 wherein the nonwoven fabric has a basis weight of about 5 to 2,000 g/m².

7. The artificial leather according to claim 1 wherein the nonwoven fabric has a thickness of about 0.5 to about 100 mm.

16. The artificial leather of claim 1 wherein said nonwoven fabric is compressed.

8. An artificial leather comprising a polyurethane supported in a nonwoven fabric, said nonwoven fabric consisting essentially of stacked and intertwined melt-blown long fibers having a diameter of about 0.1 to about 30 microns, forming thin intertwined layers extending between one surface or part thereof and the other surface of said nonwoven fabric or part thereof, said polyurethane being present in the amount of about 5 to about 150% by weight based on the weight of the nonwoven fabric, said nonwoven fabric having a basis weight of about 5 to about 2,000 g/m² and a thickness of about 0.5 to about 100 mm.

17. The artificial leather of claim 8 wherein said nonwoven fabric is compressed.

9. An artificial leather comprising a polymer supported in a nonwoven fabric laminate comprising a woven or nonwoven fabric laminated to a nonwoven fabric, said latter mentioned nonwoven fabric consisting essentially of stacked and intertwined melt-blown long fibers forming thin intertwined layers extending between one surface of said latter mentioned nonwoven fabric or a part thereof and the other surface of said latter mentioned nonwoven fabric or a part thereof.

10. The artificial leather according to claim 9 wherein the polymer is present in an amount of from about 5 to about 150% by weight based on the weight of first mentioned nonwoven fabric.

11. The artificial leather according to claim 9 wherein the first mentioned nonwoven fabric is formed of fibers having a diameter of about 0.1 to about 30 microns.

12. The artificial leather according to claim 9 wherein the first-mentioned nonwoven fabric has a basis weight of about 5 to about 2,000 g/m².

13. The artificial leather according to claim 9 wherein the first-mentioned nonwoven fabric has a thickness of from about 0.5 to about 100 mm.

14. The artificial leather according to claim 9 wherein the woven or second mentioned nonwoven fabric has a basis weight of 5 to 200 g/m².

18. The artifical leather of claim 9 wherein said nonwoven fabric is compressed.

19. The artificial leather of claim 9 wherein the laminate is compressed.

15. An artificial leather comprising a polyurethane supported in a nonwoven fabric laminate comprising a woven or nonwoven fabric laminated to a nonwoven fabric, said latter mentioned nonwoven fabric consisting essentially of stacked and intertwined melt-blown long fibers forming thin intertwined layers extending between one surface of said latter mentioned nonwoven fabric or a part thereof and the other surface of said latter mentioned nonwoven fabric or a part thereof, said polyurethane being present in the amount of from about 5 to about 15% by weight based on the weight of latter mentioned nonwoven fabric, said latter mentioned nonwoven fabric being formed of fibers having a diameter of about 0.1 to about 30 microns, the said fabric having a basis weight of about 5 to about 2,000 g/m² and a thickness of about 0.5 to about 100 mm, said woven fabric or first mentioned nonwoven fabric having a basis weight of 5 to 200 g/m².

20. The artificial leather of claim 15 wherein the woven or first mentioned nonwoven fabric is compressed.

21. The artificial leather of claim 15 wherein the laminate is compressed.