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(11) | EP 1 790 763 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Webbing for occupant restraint belt, seat belt, and seat belt apparatus |
| (57) In order to provide a technology which is effective both for applying stiffness and
for reducing the weight of an occupant restraint belt to be installed in a vehicle,
in a seat belt apparatus which is installed in a vehicle, webbing composing a seat
belt which is a long belt for restraining a vehicle occupant is woven in such a manner
that warp yarns and weft yarns made of synthetic filaments extend perpendicular to
each other. At least either of the warp yarns and the weft yarns are made of synthetic
filaments having thermal adhesiveness which are made by bundling a plurality of filament
bodies each of which comprises a first filament and a second filament which is attached
to the outer surface of the first filament and has melting point lower than that of
the first filament. The second filaments are melted when heated under a condition
of a temperature of 150 °C or more and a process time of 180 seconds or more so that
the filament bodies are welded. The webbing has weight of 60 g/m or less, tensile
strength of 25 kN or more, and retention rate after hexagonal bar abrasion of 70%
or more.
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