Backing fabrics for papermaking machine convering materials

Abstract

Backing fabric for paper machine felts, based on yarn made of polyamide 6 and polyamide 6.10, polyamide 6.11, polyamide 11 and/or polyamide 12.

1 . Backing fabric for papermaking machine covering materials, having a base fabric which comprises combination twisted yarns of monofilaments of polyamide 6 and monofilaments of polyamide 6.10, in the warp direction.  
     
     
         2 . Backing fabric for papermaking machine covering materials, having a base fabric which comprises combination twisted fabrics of monofilaments of polyamide 6 and monofilaments of polyamide 6.12, polyamide 11 or polyamide 12 in the warp direction.  
     
     
         3 . Backing fabric according to  claim 1 , wherein the twisted yarns contain 1 to 20 monofilaments of polyamide 6 and 20 to 1 monofilaments of polyamide 6.10.  
     
     
         4 . Backing fabric according to  claim 2 , wherein the twisted yarns contain 1 to 20, monofilaments of polyamide 6 and 20 to 1 monofilaments of polyamide 6.12, polyamide 11 or polyamide 12.  
     
     
         5 . Backing fabric according to any one of  claims 1  to  4 , wherein said monofilaments of said base fabrics have a diameter of 0.08 to 0.3 mm.  
     
     
         6 . Process for the production of base fabrics of papermaking machine covering materials, which comprises forming a combination twisted yarn of polyamide 6 monofilaments with monofilaments of polyamide 6.10, polyamide 6.12, polyamide 11 or polyamide 12 and forming the warp of a base fabric with said combination twisted yarn.  
     
     
         7 . Backing fabric according to  claim 3 , wherein said twisted yarns contain 1 to 6 monofilaments of polyamide 6 and 6 to 1 monofilaments of polyamide 6.10.  
     
     
         8 . Backing fabric according to  claim 4 , wherein said twisted yarns contain 1 to 6 monofilaments of polyamide 6 and 6 to 1 monofilaments of polyamide 6.12, polyamide 11 or polyamide 12.