# US 10,308,209 B2 · Base fabric for airbag and airbag

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- Number: US 10,308,209 B2
- Document ID: US10308209B2
- Status: Granted
- Kind: B2
- Application number: 15/313,796
- Filed: 2014-05-28
- Published: 2017-06-08
- Granted: 2019-06-04
- Earliest claimed: 2014-05-28
- Assignees: Asahi Kasei Kabushiki Kaisha
- Applicants: Asahi Kasei Kabushiki Kaisha
- Inventors: Fumiaki Ise
- Web page: https://patentgrep.com/patent/US10308209B2

## CPC

- B60R 21/235: characterised by their material
- D03D 1/02: Inflatable articles
- D06M 13/252: Mercaptans, thiophenols, sulfides or polysulfides, e.g. mercapto acetic acid; Sulfonium compounds
- B60R 2021/23509: {Fabric}
- B60R 2021/23542: {Weaving}
- D06M 2101/34: Polyamides
- D10B 2331/02: polyamides (D10B2331/08 takes precedence)
- D10B 2505/124: Air bags
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- D03D: WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D06M: TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES

## Abstract

The purpose of the present invention is to provide a base fabric for an airbag and an airbag wherein the strength of sewn parts is high, pressure resistance is superior for an airbag during high-pressure deployment at high speeds, and pressure resistance can be maintained even after passage of time in heat. This base fabric for an airbag is characterized by being formed from woven polyamide fibers, and the retention of sewn part strength in the base fabric with heating before and after heat treatment for 400 hours at 140° C. being 70% or greater.

## Claims

### Claim 1

A base fabric for an airbag composed of woven, polyamide yarns, wherein the retention rate of the strength of sewn parts of the base fabric before and after heat treatment for 400 hours at 140° C. is 70% or more,
wherein the difference in crimps of yarns between the warp direction and weft direction of composite yarns composing the base fabric before and after heat treatment for 400 hours at 140° C. is 5.0% or less,
wherein the amount of cyclohexane-extracted oily components is greater than 0.02% by weight but less than 0.3% by weight based on the weight of the base fabric, and
wherein a higher alcohol ester and/or a higher alcohol polyether ester of a carboxylic acid having a thioether group is contained in the cyclohexane-extracted oily components at 0.02% by weight or more based on the weight of the base fabric.

### Claim 2 (depends on 1)

The base fabric for an airbag according to claim 1, wherein the ratio of the sewn part strength to non-sewn part strength of the base fabric (sewn part strength/non-sewn part strength) is 60% or more.

### Claim 3 (depends on 1, 2)

The base fabric for an airbag according to claim 1 or 2, wherein the loop strength of composite yarns following heat treatment for 400 hours at 140° C. is 4.5 cN/dtex or more.

### Claim 4 (depends on 1, 2)

The base fabric for an airbag according to claim 1 or 2, wherein the yarn-to-yarn friction index of composite yarns following heat treatment for 400 hours at 140° C. is 1.5 to 3.5.

### Claim 5 (depends on 1, 2)

The base fabric for an airbag according to claim 1 or 2, wherein the loop strength of composite yarns composing the base fabric is 4.5 cN/dtex to 10.0 cN/dtex.

### Claim 6 (depends on 1, 2)

The base fabric for an airbag according claim 1 or 2 wherein the yarn-to-yarn coefficient of friction of composite yarns is 1.5 to 3.5 and the loop strength thereof is 7 cM/dtex or more.

### Claim 7 (depends on 1, 2)

The base fabric for an airbag according to claim 1 or 2, wherein the tensile strength of the base fabric following heat treatment for 400 hours at 140° C. is 500 N/cm or more.

### Claim 8 (depends on 1, 2)

The base fabric for an airbag according claim 1 or 2, wherein the tensile strength is 500 N/cm or more.

### Claim 9 (depends on 1, 2)

The base fabric for an airbag according to claim 1 or 2, wherein the strength of the raw yarn used for the weaving yarn is 8.0 cN/dtex or more.

### Claim 10 (depends on 1, 2)

The base fabric for an airbag according to claim 1 or 2, wherein a higher alcohol ester of a carboxylic acid having a thioether group is contained in the cyclohexane-extracted oily components at 0.015% by weight or more based on the weight of the base fabric.

### Claim 11 (depends on 1, 2)

The base fabric for an airbag according to claim 1 or 2, wherein components for which the organic/inorganic ratio is 1.50 to 1.70 are contained in total in the cyclohexane-extracted oily components at 10% by weight or more of the total amount of oily components.

### Claim 12 (depends on 1, 2)

The base fabric for an airbag according to claim 1 or 2, wherein a nonionic surfactant component is contained in the cyclohexane-extracted oily components at 0.01% by weight or more based on the weight or the base fabric.

### Claim 13 (depends on 1, 2)

An airbag obtained by sewing the base fabric for an airbag according to claim 1 or 2.

### Claim 14 (depends on 13)

An airbag module that includes the airbag according to claim 13.