Polyester base fabric for airbag, polyester airbag, and method of manufacturing polyester base fabric for airbag

Patent metadata

Field	Value
Publication number	US-10239481-B2
Application number	US-201615562009-A
Country	US
Kind code	B2
Filing date	Mar 10, 2016
Priority date	Mar 30, 2015
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

A polyester base fabric for airbags woven from polyester fiber has an energy absorption amount in a warp direction (EW) when the polyester base fabric is elongated up to a stress of 118 N/cm and subsequently relaxed to a stress of 0 N/cm of 1.0 to 3.0 J/cm2; an energy absorption amount in a weft direction (EF) when the polyester base fabric is elongated up to a stress of 118 N/cm and subsequently relaxed to a stress of 0 N/cm of 1.0 to 3.0 J/cm2; and a ratio (EW/EF) of the energy absorption amount in the warp direction (EW) to the energy absorption amount in the weft direction (EF) of 0.5 to 2.0.

First claim

The invention claimed is:

1. A polyester base fabric for airbags woven from polyester fiber, wherein:
an energy absorption amount in a warp direction (EW) when the polyester base fabric is elongated up to a stress of 118 N/cm and subsequently relaxed to a stress of 0 N/cm is 1.0 to 3.0 J/cm 2 ;
an energy absorption amount in a weft direction (EF) when the polyester base fabric is elongated up to a stress of 118 N/cm and subsequently relaxed to a stress of 0 N/cm is 1.0 to 3.0 J/cm 2 ;
a ratio (EW/EF) of the energy absorption amount in the warp direction (EW) to the energy absorption amount in the weft direction (EF) is 0.5 to 2.0.

2. The polyester base fabric for airbag of claim 1 , wherein a basis weight is not more than 250 g/m 2 .

3. The polyester base fabric for airbag of claim 1 , having a cover factor of 2,000 to 2,600.

4. The polyester base fabric for airbag of claim 1 , wherein:
an elongation in the warp direction when the polyester base fabric is elongated up to a stress of 118 N/cm is 5 to 10%; and
an elongation in the weft direction when the polyester base fabric is elongated up to a stress of 118 N/cm is 5 to 10%.

5. A polyester airbag woven from the polyester base fabric of claim 1 .

6. A method of manufacturing the polyester base fabric of claim 1 , comprising:
using a loom having a positive easing mechanism to perform weaving so that a ratio (E/H) of an easing amount (E) to a shedding amount of a first frame (H) is 3 to 10%.

7. The polyester base fabric for airbag of claim 2 , having a cover factor of 2,000 to 2,600.

8. The polyester base fabric for airbag of claim 2 , wherein:
an elongation in the warp direction when the polyester base fabric is elongated up to a stress of 118 N/cm is 5 to 10%; and
an elongation in the weft direction when the polyester base fabric is elongated up to a stress of 118 N/cm is 5 to 10%.

9. The polyester airbag of claim 5 , wherein a basis weight of the polyester base fabric is not more than 250 g/m 2 .

10. The method of manufacturing the polyester base fabric for airbag of claim 6 , wherein a basis weight of the polyester base fabric is not more than 250 g/m 2 .

Assignees

• Toray Industries

Inventors

• Yamada Riku
• Tanaka Nobuaki

Classifications

• D03D1/02 Primary

  Inflatable articles · CPC title

• D10B2331/04

  polyesters, e.g. polyethylene terephthalate [PET] · CPC title

• C08L67/03

  the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings · CPC title

• D10B2505/124

  Air bags · CPC title

• D03D49/22

  Back rests; Lease rods; Brest beams · CPC title