Woven belt

• US 20080139066A1
• Filed: 05/24/2007
• Published: 06/12/2008
• Est. Priority Date: 12/11/2006
• Status: Active Grant

• Current Assignee: Joyson Safety Systems Japan K.K.
• Original Assignee: Takata Corporation (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Tabayashi, Itsuo, Shimazaki, Sadayuki
• Granted Patent: US 7,735,933 B2
• Time in Patent Office: Days
• US Class Current: 442/189
• CPC Class Codes: B60R 22/12 Construction of belts or harnesses B60R21/18 takes precedence ; woven fabrics for safety belts D03D1/0005
• CPC Class Codes: D03D 1/0005 Woven fabrics for safety belts
• CPC Class Codes: D03D 15/587 adhesive; fusible
• CPC Class Codes: D10B 2401/041 thermoplastic; thermosetting
• CPC Class Codes: Y10T 442/3065 Including strand which is of specific structural definition

Abstract

The disclosed woven belt may include first filament yarn bundles extending in a substantially longitudinal direction of a webbing and second filament yarn bundles extending in a substantially transverse direction of the webbing. At least one of the first filament yarn bundles and the second filament yarn bundles may comprise filament yarn bundles containing middle-shrink synthetic filament yarns.

Claims

1. A woven belt comprising:

first filament yarn bundles extending in a substantially longitudinal direction of a webbing; and

second filament yarn bundles extending in a substantially transverse direction of the webbing,

wherein at least one of the first filament yarn bundles and the second filament yarn bundles comprises filament yarn bundles containing middle-shrinking synthetic filament yarns which have a shrinkage ratio of a size after shrinkage of 15% to 20% relative to a size before shrinkage.

2. The woven belt according to claim 1, wherein the first filament yarn bundles comprise filament yarn bundles containing normal synthetic filament yarns and the second filament yarn bundles comprise filament yarn bundles containing the middle-shrinking synthetic filament yarns.

3. The woven belt according to claim 1, wherein the middle-shrinking synthetic filament yarns contain a low-melting-point filament component having a relatively low melting point and a high-melting-point filament component having a relatively high melting point.

4. The woven belt according to claim 3, wherein the middle-shrinking synthetic filament yarns contain the low-melting-point filament component dispersed in the high-melting-point filament component.

5. The woven belt according to claim 3, wherein the melting point of the high-melting-point filament component is 250°

C. to 260°

C., and the melting point of the low-melting-point filament component is 160°

C. to 250°

C.

6. The woven belt according to claim 1, wherein density of one of the first filament yarn bundles and the second filament yarn bundles is 20 picks per inch or less of the other filament yarn bundles.

7. The woven belt according to claim 1, wherein at least one of the first filament yarn bundles and the second filament yarn bundles comprises filament yarn bundles containing non-twist yarns with entanglements.

8. The woven belt according to claim 1, wherein the middle-shrinking synthetic filament yarns comprises polyethylene terephthalate and polyethylene isophthalate.

9. A seatbelt device comprising:

a woven belt for restraining an occupant;

a retractor device for retracting the woven belt;

a buckle configured to be connected to a fixed side member of a vehicle; and

a tongue that engages with the buckle, the tongue being attached to the woven belt,

wherein the woven belt comprises first filament yarn bundles extending in a substantially longitudinal direction of a webbing and second filament yarn bundles extending in a substantially transverse direction of the webbing, and

wherein at least one of the first filament yarn bundles and the second filament yarn bundles comprises filament yarn bundles containing middle-shrinking synthetic filament yarns.

10. The seatbelt device according to claim 9, wherein the middle-shrinking synthetic filament yarns have a shrinkage ratio of a size after shrinkage of 15% to 20% relative to a size before shrinkage.