Airbag cushion

Patent metadata

Field	Value
Publication number	US-12441269-B2
Application number	US-202318842359-A
Country	US
Kind code	B2
Filing date	Feb 6, 2023
Priority date	Mar 4, 2022
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

An airbag cushion has a plurality of base fabrics and adhesive joints for bonding each of the plurality of base fabrics, wherein the adhesive joint includes a sealing adhesive, a tensile strength (S1) between the base fabric and the adhesive joint is 500 N/5 cm or more, and an application width (L1) and an application thickness (L2) of the adhesive joint satisfy inequality (1):

L
⁢
1
×
L
⁢
2

≤

50
⁢

mm
2

.

(
1
)

First claim

What is claimed is:

1. An airbag cushion having a plurality of base fabrics and adhesive joints for bonding each of the plurality of base fabrics,
wherein each adhesive joint includes a sealing adhesive,
a tensile strength (S1) between the base fabric and the adhesive joint is 500 N/5 cm or more, and
an application width (L1) and an application thickness (L2) of the adhesive joint satisfy inequality (1):

L
⁢
1
×
L
⁢
2

≤

50
⁢

mm
2

,

(
1
)

wherein the plurality of base fabrics include a first base fabric, a second base fabric, and a third base fabric connecting the first base fabric and the second base fabric,
the third base fabric and one surface of the first base fabric are bonded by a first adhesive joint comprising the sealing adhesive, and
the third base fabric and one surface of the second base fabric are bonded by a second adhesive joint comprising the sealing adhesive,
the first base fabric and the second base fabric are arranged side by side without their respective ends overlapping each other.

2. The airbag cushion of claim 1 , wherein each adhesive joint does not comprise a sewn part in which the plurality of base fabrics are sewn together with sewing threads.

3. The airbag cushion of claim 2 , wherein, when a dry heat treatment is performed for 408 hours under a condition of a temperature at 105° C., a tensile strength (S2) between the base fabric and each adhesive joint after the dry heat treatment satisfies inequality (2):

S
⁢
2

≥

S
⁢
1
×

0.9
.

(
2
)

4. The airbag cushion of claim 2 , wherein, when a humidity heat treatment is performed for 408 hours under a condition of a temperature at 70° C. and a humidity of 95% RH, a tensile strength (S3) between the base fabric and each adhesive joint after the humidity heat treatment satisfies inequality (3):

S
⁢
3

≥

S
⁢
1
×

1.
.

(
3
)

5. The airbag cushion of claim 2 , wherein a packability value measured in accordance with ASTM D-6478-10 is 3000 cm 3 or less.

6. The airbag cushion of claim 2 , wherein the plurality of base fabrics are coated base fabrics each having at least one surface coated with resin.

7. The airbag cushion of claim 1 , wherein, when a dry heat treatment is performed for 408 hours under a condition of a temperature at 105° C., a tensile strength (S2) between the base fabric and each adhesive joint after the dry heat treatment satisfies inequality (2):

S
⁢
2

≥

S
⁢
1
×

0.9
.

(
2
)

8. The airbag cushion of claim 1 , wherein, when a humidity heat treatment is performed for 408 hours under a condition of a temperature at 70° C. and a humidity of 95% RH, a tensile strength (S3) between the base fabric and each adhesive joint after the humidity heat treatment satisfies inequality (3):

S
⁢
3

≥

S
⁢
1
×

1.
.

(
3
)

9. The airbag cushion of claim 1 , wherein a packability value measured in accordance with ASTM D-6478-10 is 3000 cm 3 or less.

10. The airbag cushion of claim 1 , wherein the plurality of base fabrics are coated base fabrics each having at least one surface coated with resin.

Assignees

• Toray Industries

Inventors

• Shinkai Hironori
• Morimoto Atsushi
• Hattori Kazuki
• Sugino Masanori
• Ito Hirotaka

Classifications

• B29C65/50

  using adhesive tape {, e.g. thermoplastic tape; using threads or the like (B29C65/3444 takes precedence)} · CPC title

• B60R2021/2358

  Bonding · CPC title

• B29C65/48

  using adhesives {, i.e. using supplementary joining material; solvent bonding} · CPC title

• B29C66/439

  Joining sheets for making inflated articles without using a mould · CPC title

• D06N2211/268

  Airbags · CPC title