Method of producing woven webbing

Abstract

Disclosed is a method for the production of a woven belt band, especially for safety belts in vehicles, especially motor vehicles, consisting of warp threads and at least one weft thread, characterized in that a multifilament thread, made up of individual filaments, is used as a weft thread during weaving, said filaments consisting of a core surrounded by a meltable skin; also characterized in that the belt band is thermoset after weaving. The multifilament thread melts in an undulated form to form a monofilament spring-elastic single thread body, thereby increasing the cross-resistance of the belt, and is especially glued to the warp threads.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This is a continuation of PCT Serial No. PCT / EP2003 / 008311, filed Jul. 28, 2003, which claims priority to German Application No. 102 35 227.5-26, filed Aug. 1, 2002, both of which are incorporated by reference herein.BACKGROUND AND SUMMARY OF THE INVENTION [0002] The present invention relates to a method of producing woven webbing, particularly for vehicular seat belts, especially for use in motor vehicles, comprising warp threads, and at least one weft thread. [0003] Methods of producing such webbing and the disadvantages of webbing produced as such are known in a wealth of variants. As a rule, the warp threads of such webbing are made of multifil yarns. Whereas for the weft thread(s) use is made solely of multifil yarns or solely of monofil yarns or combinations of monofil and multifil yarns. Making webbing exclusively with weft thread material of multifil yarn has the disadvantage that it features hardly any stiffness and elasticity ...

AI Technical Summary

Benefits of technology

[0004] The invention is based on the object of proposing a method of producing woven webbing which avoids, or at least greatly reduces, the disadvantages of prior art. This object is achieved by a method as set forth in claim 1. This method has the advantage that working the multifil yarn weftwise now makes it possible to achieve the positive structures of the keying points in the weave. Each individual fibril of the multifil yarn consists of a core sheathed in a fusible skin. This yarn, simply termed “two-component yarn” hereinafter is woven weftwise and forms flexible elliptical and flat lying keying points in the shed end, which are unachievable with monofil yarns. In setting, after weaving, the multifil yarn is heated in accordance with the invention, resulting in the fibrils of the multifil yarn interbonding due to fusion of the fusible skin and the undulating multifil yarn melting into a uniform elastomeric monofil type yarn body in thus enhancing the CD stiffness of the webbing.

Problems solved by technology

Making webbing exclusively with weft thread material of multifil yarn has the disadvantage that it features hardly any stiffness and elasticity in the cross machine direction (CD).

Although webbing made of monofil material weft threads exhibits the necessary CD stiffness and elasticity, it has, however, the drawback that the monofil weft thread at its so-called reversals after critical wear and tear juts out from the edge of the webbing as sharp as a sawtooth profile which is damaging to the clothing of the vehicle occupant and injurious to trunk and neck locations.

Apart from this, webbing made of monofil weft thread material is relatively bulky as compared to webbing made exclusively of multifil material.