Anti-perforation insole for footwear

Abstract

An anti-perforation insole ( 1 ) includes a multi-layer ( 10 ) consisted of at least four layers of a fabric ( 12 ), with a double-faced weft, made of high toughness polyester fibers coupled together by a thermoplastic film or an adhesive resin; each of the layers of fabric shows a surface treated by a coating ( 14 ) of polyurethane and/or acrylic resin enriched with micronized, ceramic: materials in form of silicates, for example of aluminium.

1 . Anti-perforation insole for footwears, characterized in that it includes a multilayer consisted of at least four layers of fabric, with a double-face weft, made of high toughness polyester fibers coupled together through thermoplastic films or adhesive resins, each of the layers of fabric showing a surface treated by smearing of polyurethane and/or acrylic resin enriched with micronized ceramic materials in form of silicates. 
     
     
         2 . Insole according to  claim 1 , characterized in that said layers of fabric are in a number of five. 
     
     
         3 . Insole according to  claim 1  or  2 , characterized in that the surface layer of said multilayer preferably shows the higher face, intended for being faced inwardly the footwear, which is not treated. 
     
     
         4 . Insole according to one of the preceding claims, characterized in that said fabric shows a heavy face with a heavy opposed spine type wave and a face with a weave of the derived satin-type. 
     
     
         5 . Insole according to one of the preceding claims, characterized in that for said fabric, 1100 dtex polyester yarns, with a toughness of 67,5-80 cN/dtex, in a number of 22±2% per cm for the warp and 29±2% per cm for the weft are used. 
     
     
         6 . Use of an anti-perforation insole, according to one of the preceding claims, as a protective insert within insoles of accident-prevention footwears. 
     
     
         7 . Use of a perforation-resistant textile structure, according to one of the  claims 1  to  5 , in the manufacturing of footwears wherein the sole is directly executed on the upper by injection molding, as an insole previously sewn to the upper of the footwear. 
     
     
         8 . Insole according to one of the preceding claims, substantially as above-mentioned and described, with reference to the enclosed drawings.