Double-Layer Anti-Splitting Slider Fastener

Abstract

The present utility model discloses a double-layer anti-splitting slide fastener, comprising a left fastener tape, a right fastener tape, a left internal fastener element row and a left external fastener element row which are separately woven on surfaces inside and outside the left fastener tape by virtue of a left sewing thread, a right internal fastener element row and a right external fastener element row which are separately woven on surfaces inside and outside the right fastener tape by virtue of a right sewing thread, and a slider, wherein the left external fastener element row is locked to the right external fastener element row and the left internal fastener element row is locked to the right internal fastener element row; and, each of the left sewing thread and the right sewing thread comprises at least two ground threads and at least two surface threads, and each of the ground threads forms a hitch in coordination with at least one of the surface threads to form a chain stitch of the same number as the ground threads. In the present utility model, as each of the left sewing thread and the right sewing thread comprises at least two ground threads and at least two surface threads and chain stitches of the same number as the ground threads are formed, the fastener element rows may be secured at multiple points and the slide fastener is effectively prevented from splitting off.

1 . A double-layer anti-splitting slide fastener, comprising a left fastener tape, a right fastener tape, a left internal fastener element row and a left external fastener element row which are separately woven on surfaces inside and outside the left fastener tape by virtue of a left sewing thread, a right internal fastener element row and a right external fastener element row which are separately woven on surfaces inside and outside the right fastener tape by virtue of a right sewing thread, and a slider, wherein the left external fastener element row is locked to the right external fastener element row and the left internal fastener element row is locked to the right internal fastener element row, characterized in that each of the left sewing thread and the right sewing thread comprises at least two ground threads and at least two surface threads, each of the ground threads forming a hitch in coordination with at least one of the surface threads to form chain stitches of the same number as the ground threads. 
     
     
         2 . The double-layer anti-splitting slide fastener according to  claim 1 , characterized in that each of the left internal fastener element row, the left external fastener element row, the right internal fastener element row and the right external fastener element row has a plurality of continuously connected fastener elements, and the top surface of each of the fastener elements is further provided with at least one notch for accommodating and limiting the sewing thread. 
     
     
         3 . The double-layer anti-splitting slide fastener according to  claim 1 , characterized in that each of the left sewing thread and the right sewing thread is woven in such a way that each of the ground threads correspondingly hitches one of the surface threads to form a chain stitch. 
     
     
         4 . The double-layer anti-splitting slide fastener according to  claim 1 , characterized in that each of the left sewing thread and the right sewing thread is woven in such a way that each of the ground threads correspondingly hitches two surface threads to form a chain stitch. 
     
     
         5 . The double-layer anti-splitting slide fastener according to  claim 1 , characterized in that each of the left sewing thread and the right sewing thread comprises two groups of sewing threads, wherein the first group of sewing threads are woven in such a way that each of the ground threads correspondingly hitches one of the surface threads to form a chain stitch, while the second group of sewing threads are woven in such a way that each of the ground threads correspondingly hitches two surface threads to form a chain stitch. 
     
     
         6 . (canceled) 
     
     
         7 . The double-layer anti-splitting slide fastener according to  claim 1 , characterized in that each of the left internal fastener element row, the left external fastener element row, the right internal fastener element row and the right external fastener element row is a spiral fastener element row made from resin. 
     
     
         8 . The double-layer anti-splitting slide fastener according to  claim 2 , characterized in that each of the left internal fastener element row, the left external fastener element row, the right internal fastener element row and the right external fastener element row is a spiral fastener element row made from resin.