Coated fabric for airbag, and process for producing coated fabric for airbag

Patent metadata

Field	Value
Publication number	US-9650729-B2
Application number	US-201314377252-A
Country	US
Kind code	B2
Filing date	Feb 6, 2013
Priority date	Feb 7, 2012
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

The present invention is coated fabric for airbags which is obtained by applying a silicone resin to at least one surface of woven fabric constituted of synthetic fiber filaments, in an amount of 20 g/m 2 or less. The coated fabric is characterized in that in the uncoated base fabric, the warp crimp ratio is less than the weft crimp ratio, the warp crimp ratio is 4% or less, and the difference between the warp crimp ratio and the weft crimp ratio is 0.8-3.0%, and that the coated fabric has a air permeability, measured at a differential pressure of 100 kPa, of 0.02 L/cm 2 /min or less. Although the amount of the resin applied is 20 g/m 2 or less, extremely low air permeability is ensured.

First claim

The invention claimed is:

1. A coated fabric for airbags made by applying 20 g/m 2 or less of a silicone resin to at least one surface of a textile constituted by synthetic fiber filaments,
wherein the coated fabric has a warp crimp ratio smaller than a weft crimp ratio, the warp crimp ratio being 4% or less and a difference between the weft crimp ratio and the warp crimp ratio being 0.8% to 3.0%, and wherein an air permeability of the coated fabric under a differential pressure of 100 kPa is 0.02 L/cm 2 /min or less.

2. A coated fabric for airbags made by applying 20 g/m 2 or less of a silicone resin to at least one surface of a textile constituted by synthetic fiber filaments,
wherein a fabric before coating has a warp crimp ratio smaller than a weft crimp ratio, the warp crimp ratio being 4% or less, and wherein an air permeability of the coated fabric under a differential pressure of 100 kPa is 0.02 L/cm 2 /min or less.

3. The coated fabric for airbags according to claim 1 or claim 2 , wherein a warp tension of the fabric at weaving is not less than 0.16 cN/dtex and not more than 0.40 cN/dtex.

4. The coated fabric for airbags according to claim 1 or claim 2 , wherein a whole fineness of the filaments constituting the textile is 200 dtex to 470 dtex.

5. The coated fabric for airbags according to claim 1 or claim 2 , wherein a cover factor of the textile is 1,800 to 2,500.

6. A process for producing the coated fabric for airbags according to claim 1 or claim 2 , wherein a method for applying the resin is a knife coating method; a front end radius of the knife used is 0.5 mm or less; and a tension in a longitudinal direction of the textile at the knife coating is 0.10 cN/dtex or less.

Assignees

• Toyo Boseki

Inventors

• Akechi Tsutomu
• Kitamura Mamoru

Classifications

• D06M15/643

  containing silicon in the main chain · CPC title

• D10B2505/124

  Air bags · CPC title

• D10B2331/02

  polyamides (D10B2331/08 takes precedence) · CPC title

• D06N3/0006

  using woven fabrics · CPC title

• Y10T442/322

  Warp differs from weft · CPC title