Shrinkproof elastic tape and a method of making same

Abstract

An elastic tape is disclosed as including a warp yarn and a weft yarn, in which the warp yarn includes an elastomeric core yarn wound around by a thermo-fusible yarn which is adapted to melt in heat and bonded with the adjacent yarn(s). There is also disclosed a method of forming an elastic tape, including the steps of (a) winding a thermo-fusible yarn around an elastomeric core yarn to form a first yarn; (b) weaving or knitting the first yarn and at least a weft yarn integrally with one another, with the first yarn as a warp yarn; and (c) heat treating the yarns to melt the thermo-fusible yarn to integrally bond with the adjacent yarn(s).

1 . An elastic tape including at least a warp yarn and at least a weft yarn, characterized in that said warp yarn includes at least one elastomeric core yarn wound around by at least one thermo-fusible yarn which is adapted to melt in heat and bonded with the adjacent yarn(s).  
     
     
         2 . A tape according to  claim 1  further characterized in that said elastomeric core yarn is further wound around by a non-thermo-fusible yarn.  
     
     
         3 . A tape according to  claim 1  further characterized in that said elastomeric core yarn is wound around by two threads of thermo-fusible yarn.  
     
     
         4 . A tape according to  claim 1  wherein said elastomeric core yarn is a polyurethane yarn or rubber yarn.  
     
     
         5 . A tape according to  claim 1  wherein said thermo-fusible yarn melts in heat and becomes adhesive in the heat treatment process.  
     
     
         6 . A method of forming an elastic tape, including the steps of: 
 (a) winding at least a thermo-fusible yarn around at least an elastomeric core yarn to form a first yarn;    (b) weaving or knitting said first yarn and at least a weft yarn integrally with one another, with said first yarn as a warp yarn; and    (c) heat treating said yarns to melt at least part of said thermo-fusible yarn to integrally bond with the adjacent yarn(s).    
     
     
         7 . A method according to  claim 6  further characterized in including a step (d) of winding a non-thermo-fusible yarn around said elastomeric core yarn.  
     
     
         8 . A method according to  claim 6  further characterized in including a step (e) of winding two threads of thermo-fusible yarn around said elastomeric core yarn.  
     
     
         9 . A method according to  claim 6  wherein said elastomeric core yarn is a polyurethane yarn or rubber yarn.  
     
     
         10 . A method according to  claim 6  wherein said thermo-fusible yarn melts in heat and becomes adhesive in the heat treatment process.