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.

1 . 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, the method comprising, in weaving, use is made of a multifil yarn as at least one weft thread, the multifil yarn being composed of individual fibrils comprising a core sheathed by a fusible skin, the weft threads in the edge portion forming weft reversals having flexible elliptically flattened keying points, and that the webbing is thermoset after weaving, the undulating multifil yarn thereby melting into a uniform elastomeric monofil type yarn body in thus enhancing the CD stiffness of the webbing.  
   
   
       2 . The method as set forth in  claim 1  wherein after weaving, the webbing is thermoset, resulting in the multifil yarn bonding to the warp threads.  
   
   
       3 . The method as set forth in  claim 1  wherein polyamide is used for the skin and polyester for the core.  
   
   
       4 . The method as set forth in  claim 1  wherein polyester is used for the skin and for the core.  
   
   
       5 . The method as set forth in  claim 1  wherein the skin-to-core mass ratio is in the range of approx. 20%-80% to approx. 30%-70%.  
   
   
       6 . The method as set forth in  claim 1  wherein the at least one weft thread is woven over only part of the warp threads and a second weft thread is woven shedded with the at least one first weft thread but running over the full width of the webbing.  
   
   
       7 . The method as set forth  claim 1  wherein the webbing is woven with circular selvedge.  
   
   
       8 . The method as set forth in  claim 1  wherein the webbing is provided in its edge portion with additional threads.  
   
   
       9 . The method as set forth  claim 1  wherein the at least one weft thread at the edge is interlaced with tuck and/or seal threads.  
   
   
       10 . A method of manufacturing a product, the method comprising: 
 (a) weaving a multifil thread with a second thread;    (b) interbonding fibrils of the multifil thread; and    (c) creating a vehicular seat belt from the woven threads.    
   
   
       11 . The method of  claim 10  further comprising creating an elliptically flattened soft reversal in an edge portion of the seat belt.  
   
   
       12 . The method of  claim 10  further comprising thermosetting the woven multifil and second threads together.  
   
   
       13 . The method of  claim 10  further comprising using a multifil thread including a core sheathed by a fusible skin.  
   
   
       14 . The method of  claim 10  further comprising: 
 weaving a weft one of the threads over only part of a warp one of the threads; and    weaving and shedding another weft thread over a full width of the seat belt.    
   
   
       15 . A seat belt webbing comprising a multifil yarn including individual fibrils each having a core within a fusible skin, at least some of the fibrils interbonding due to heated fusion of the fusible skin.  
   
   
       16 . The seat belt webbing of  claim 15  wherein the multifil yarn is melted into a substantially uniform elastomeric monofil type yarn body.  
   
   
       17 . The seat belt webbing of  claim 15  wherein the multifil yarn is woven weftwise to create a flexible elliptical with substantially flat lying keying points in a shed end.  
   
   
       18 . The seat belt webbing of  claim 15  further comprising a warp thread woven with the multifil yarn, the multifil yarn acting as a weft thread.  
   
   
       19 . The seat belt webbing of  claim 15  wherein polyamide is used for the skin and polyester is used for the core.  
   
   
       20 . The seat belt webbing of  claim 15  wherein polyester is used for the skin and the core.