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-shrinking synthetic filament yarns.
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 of the first and second 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 comprise polyethylene terephthalate and polyethylene isophthalate.
9. A seatbelt device comprising:
a woven belt as claimed in claim 1 ;
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.
10. 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 which have a shrinkage ratio of a size after shrinkage of 15% to 20% relative to a size before shrinkage.