Sheet material and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-11021838-B2
Application number	US-201515504912-A
Country	US
Kind code	B2
Filing date	Aug 18, 2015
Priority date	Aug 28, 2014
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

A sheet material has good mechanical properties, flexibility, lightweight properties, and quality, and also relates to a production method therefor. The sheet material includes, as constitutional components, an elastic polymer and nonwoven fabric composed mainly of ultrafine hollow fiber with an average monofilament diameter in the range of 0.05 to 10 μm, the ultrafine hollow fiber containing 2 to 60 hollows.

First claim

The invention claimed is:

1. Sheet material comprising an elastic polymer and a nonwoven fabric containing ultrafine hollow fibers with an average monofilament diameter of 0.05 to 6 pm, the ultrafine hollow fibers having a fiber cross section containing 3 or 4 hollows.

2. Sheet material as set forth in claim 1 that is artificial leather having a nap at least on one surface.

3. Sheet material as set forth in claim 1 that is artificial leather having a grained surface layer.

4. A method of producing sheet material as set forth in claim 1 comprising:
forming ultrafine hollow fibers from composite fibers having a structure in which less soluble island component regions are present in more soluble sea component regions and more soluble inner sea component regions are present in the less soluble island component regions.

5. A method of producing sheet material as set forth in claim 2 comprising:
forming ultrafine hollow fibers from composite fibers having a structure in which less soluble island component regions are present in more soluble sea component regions and more soluble inner sea component regions are present in the less soluble island component regions.

6. A method of producing sheet material as set forth in claim 3 comprising:
forming ultrafine hollow fibers from composite fibers having a structure in which less soluble island component regions are present in more soluble sea component regions and more soluble inner sea component regions are present in the less soluble island component regions.

Assignees

• Toray Industries

Inventors

• Nishimura Hajime
• Matsuzaki Yukihiro
• Nishimura Makoto
• Kaneko Makoto

Classifications

• D06N3/00 Primary

  Artificial leather, oilcloth or {other} material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof · CPC title

• D01F6/00

  Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof · CPC title

• D01F8/04

  from synthetic polymers · CPC title

• D01D5/24

  with a hollow structure; Spinnerette packs therefor (D01D5/38 takes precedence; producing tubes of plastic material B29D; addition of agents forming hollow filaments D01F1/08) · CPC title

• D06N3/106

  Elastomers · CPC title