Fabric for airbag, coated fabric for airbag, and airbag using same

Patent metadata

Field	Value
Publication number	US-11130467-B2
Application number	US-201816640552-A
Country	US
Kind code	B2
Filing date	Aug 17, 2018
Priority date	Aug 21, 2017
Publication date	Sep 28, 2021
Grant date	Sep 28, 2021

Abstract

An airbag fabric comprising a synthetic fiber, the fiber having a total fineness of 200 to 400 dtex, and the fabric having an average edgecomb resistance retention in the warp and weft directions after heating at 210° C. for 30 seconds of 60% or more and a residual shrinkage of 1.5% or less in both the warp and weft directions.

First claim

The invention claimed is:

1. An airbag fabric comprising a synthetic fiber, the fiber having a total fineness of 200 to 400 dtex, and the fabric having an average edgecomb resistance retention in the warp and weft directions after heating at 210° C. for 30 seconds of 60% or more and a residual shrinkage of 1.5% or less in both the warp and weft directions.

2. The airbag fabric according to claim 1 , wherein the fiber has a tensile strength of 7.5 to 9.3 cN/dtex.

3. The airbag fabric according to claim 1 , wherein the fabric has a mass per unit area of 210 g/m 2 or less, a thickness of 0.3 mm or less, and a tensile strength of 550 N/cm or more.

4. The airbag fabric according to claim 1 , wherein the synthetic fiber comprises a polyamide multifilament comprising a polyamide resin having a relative polymer viscosity to sulfuric acid of 3.0 to 3.5, the multifilament having a tensile strength of 9.0 cN/dtex or more, a tensile elongation of less than 20%, a total fineness of 400 dtex or less, a fineness of single filament of 2 to 7 dtex, a boiling-water shrinkage of 7 to 12%, and a coefficient of variation CV % of single filament cross-sectional diameter of 20% or less.

5. The airbag fabric according to claim 1 , which is produced by, after weaving gray fabric, subjecting the gray fabric to a hot-water shrinkage step using hot water of 80° C. or higher, and to a dry-finishing step.

6. An airbag comprising the airbag fabric according to claim 1 .

7. A coated fabric for airbags, comprising a fabric comprising a synthetic fiber and a coating supported by the fabric, the coated fabric having a coefficient of compactness test of 8000 to 11000 mm 3 , an average edgecomb resistance retention in the warp and weft directions after heating at 210° C. for 30 seconds of 60% or more, and a residual shrinkage of 1.5% or less in both the warp and weft directions.

8. The coated fabric for airbags according to claim 7 , wherein the coated fabric has a thickness of 0.3 mm or less, and a tensile strength of 550 N/cm or more.

9. The coated fabric for airbags according to claim 7 , wherein the coating comprises a solvent-free silicone as a coating resin.

10. An airbag comprising the coated fabric for airbags according to claim 7 .

Assignees

• Toyo Boseki

Inventors

• Kamimura Ryuji
• Akechi Tsutomu

Classifications

• D03D1/02 Primary

  Inflatable articles · CPC title

• B60R21/235 Primary

  characterised by their material · CPC title

• D06M10/00

  Physical treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, e.g. by ultrasonic waves, corona discharge, irradiation, electric currents or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements · CPC title

• D06M15/643

  containing silicon in the main chain · CPC title

• D06M10/04

  Physical treatment combined with treatment with chemical compounds or elements (graft polymerisation using wave energy or particle radiation D06M14/18 {; treatment with radioactive elements D06M10/008}) · CPC title