Leather-like sheet material having low slip characteristics

• US 4,515,852 A
• Filed: 05/06/1983
• Issued: 05/07/1985
• Est. Priority Date: 05/10/1982
• Status: Expired due to Fees

• Current Assignee: Kao Soap Co., Ltd., Kuraray Company Limited
• Original Assignee: Kao Soap Co., Ltd., Kuraray Company Limited
• Inventors: Nishimura, Takeo, Katabe, Kenichi
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): Johnson, Beverly K.
• Application Number:
  US06/492,451
• Time in Patent Office: 732 Days
• Field of Search: 428/423.3, 428/904, 428/246, 428/286, 428/284, 428/245, 428/260, 428/262, 428/264, 428/265, 428/267, 528/45, 524/507, 524/591
• US Class Current: 442/101
• CPC Class Codes: D06N 3/14 with polyurethanes
• CPC Class Codes: D06N 3/183 the layers are one next to the other
• CPC Class Codes: Y10S 273/08 Urethane
• CPC Class Codes: Y10S 428/904 Artificial leather
• CPC Class Codes: Y10T 428/31554 Next to second layer of polyamidoester
• CPC Class Codes: Y10T 442/2344 Coating or impregnation is anti-slip or friction-increasing other than specified as an abrasive

Abstract

A leather-like sheet material having low slip characteristics comprising:

a sheet material having a fibrous substrate and a surface layer consisting of a polymer mainly composed of polyurethane elastomer, and

an acryl-modified polyurethane resin spread on the said surface,

whereby the sheet material has a remarkably high friction coefficient, and is adapted to balls, baseball gloves, bags, cases and the like which are required to prevent slipperiness.

Claims

1. A leather-like sheet material having low slip characteristics comprising:

sheet material having a fibrous substrate consisting of a fibrous mat,

a surface layer consisting of a polymer mainly composed of a polyurethane elastomer, and

an acryl-modified polyurethane resin spread on the surface layer, said acryl-modified polyurethane resin spread on the surface layer, said acryl-modified polyurethane resin being made by polymerization of an ethylenically unsaturated compound in the presence of a polyurethane emulsion.

2. The leather-like sheet material according to claim 1, wherein the surface layer has a porous layer consisting of a polymer mainly composed of a polyurethane elastomer and a nonporous layer consisting of a polymer mainly composed of a polyurethane elastomer.

3. The leather-like sheet material according to claim 1, wherein the surface layer contains a colorant.

4. The leather-like sheet material according to claim 1, wherein the polyurethane elastomer constituting the surface layer has nitrogen atoms derived from isocyanate group of the organic polyisocyanate in an ambunt of 3 to 7 % by weight based on the polyurethane elastomer.

5. The leather-like sheet material according to claim 1, wherein the polymer mainly composed of a polyurethane. elastomer has a Young'"'"'s modulus of 1.0 to 20 kg/mm².

6. The leather-like sheet material according to claim 1, wherein the acryl-modified polyurethane is spread in an amount of 0.1 to 20 g/m² based on the solids content.

7. The leather-like sheet material according to claim 1, wherein the fibrous mat is impregnated with an elastic polymer.

8. The leather-like sheet material according to claim 7, wherein the surface layer has a porous layer consisting of a polymer mainly composed of a polyurethane elastomer and a non-porous layer consisting of a polymer mainly composed of a polyurethane elastomer.