Artificial leather and method for producing the same

Patent metadata

Field	Value
Publication number	US-11555271-B2
Application number	US-202017098558-A
Country	US
Kind code	B2
Filing date	Nov 16, 2020
Priority date	Feb 24, 2020
Publication date	Jan 17, 2023
Grant date	Jan 17, 2023

Abstract

The present invention relates to an artificial leather and a method for producing the same. The artificial leather includes a substrate, a thermoplastic polyurethane fiber adhesive layer, a thermoplastic polyurethane fiber layer, a paste layer, and a surface layer. The paste layer has a thermosetting paste or a high solid-content paste, and the paste has a specific adhesive temperature. A bonding can be performed at low temperature in the method for producing the same, and the artificial leather made by the method for producing the same has excellent hand feeling and/or smoothness.

First claim

What is claimed is:

1. An artificial leather, comprising:
a substrate;
a thermoplastic polyurethane fiber adhesive layer, disposed on the substrate;
a thermoplastic polyurethane fiber layer, disposed on the thermoplastic polyurethane fiber adhesive layer, and the thermoplastic polyurethane fiber adhesive layer is located between the thermoplastic polyurethane fiber layer and the substrate;
a paste layer, disposed on the thermoplastic polyurethane fiber layer, wherein the paste layer comprises a thermosetting paste, a solid content of the thermosetting paste is 20 to 40%, the thermosetting paste comprises thermoplastic polyurethane, a chemical structure of the thermoplastic polyurethane comprises a soft segment with a molecular weight of 1500 g/mol, an adhesive temperature of the thermosetting paste is 65° C. to 80° C., and a viscosity of the thermosetting paste is 5000 cps to 30000 cps; and
a surface layer, disposed on the paste layer, and the paste layer is located between the thermoplastic polyurethane fiber layer and the surface layer.

2. The artificial leather of claim 1 , wherein the surface layer comprises a water-based film and/or an oil-based film.

3. A method for producing an artificial leather, comprising:
providing a substrate;
meltblowing a thermoplastic polyurethane fiber adhesive layer on the substrate;
meltblowing a thermoplastic polyurethane fiber layer on the thermoplastic polyurethane fiber adhesive layer, and the thermoplastic polyurethane fiber adhesive layer is located between the thermoplastic polyurethane fiber layer and the substrate;
thermal bonding the substrate, the thermoplastic polyurethane fiber adhesive layer and the thermoplastic polyurethane fiber layer to form a stacked material;
forming a paste layer on a surface layer, wherein the paste layer comprises a thermosetting paste, a solid content of the thermosetting paste is 20 to 40%, the thermosetting paste comprises thermoplastic polyurethane, a chemical structure of the thermoplastic polyurethane comprises a soft segment with a molecular weight of 1500 g/mol and a viscosity of the thermosetting paste is 5000 cps to 30000 cps; and
heating the paste layer to an adhesive temperature to adhere the paste layer to the thermoplastic polyurethane fiber layer of the stacked material, thereby producing the artificial leather, wherein the adhesive temperature is 65° C. to 80° C., and the paste layer is located between the surface layer and the thermoplastic polyurethane fiber layer.

4. The method for producing the artificial leather of claim 3 , wherein the thermosetting paste comprises a crosslinking agent.

5. The method for producing the artificial leather of claim 3 , wherein the surface layer comprises a water-based film and/or an oil-based film.

Assignees

• San Fang Chemical Ind Co Ltd

Inventors

• Lin Chih-Yi
• Cheng Kuo-Kuang
• Huang Chien-Chia
• Lin Chia-Ho
• Tseng Yen-Lun
• Chen Chin-Wei
• Lin Ching-Lo

Classifications

• B32B2262/0292

  Polyurethane fibres · CPC title

• D06N3/0036

  Polyester fibres (for elastomeric fibres D06N3/0025) · CPC title

• D06N3/145 Primary

  two or more layers of polyurethanes · CPC title

• B32B2260/023

  Two or more layers · CPC title

• D04H13/00

  Other non-woven fabrics · CPC title