Heat-resistant laminated conveyer belt

Abstract

A heat-resistant laminated conveyer belt includes a fluororesin-coated core and a reinforcement layer which is formed on the core through an adhesive layer. The core is obtained by impregnating an aramid fiber woven fabric in a fluororesin dispersion and drying and sintering the fabric. The reinforcement layer is obtained by impregnating an aramid fiber woven fabric to which stretch properties are applied in a fluororesin dispersion and drying and sintering the fabric. The aramid fiber woven fabric of the core is a woven fabric by a plain-weave seamless loom or a circular loom. The aramid fiber woven fabric of the core includes an S-twist weft yarn and a Z-twist weft yarn which are alternatively arranged.

1 . A heat-resistant laminated conveyer belt comprising:
 a fluororesin-coated core obtained by impregnating an aramid fiber woven fabric in a fluororesin dispersion and drying and sintering the fabric; and a reinforcement layer which is formed on the core through an adhesive layer and obtained by impregnating an aramid fiber woven fabric to which stretch properties are applied in a fluororesin dispersion and drying and sintering the fabric;   wherein the aramid fiber woven fabric of the core is a woven fabric by a plain-weave seamless loom and the woven fabric includes an S-twist weft yarn and a Z-twist weft yarn which are alternatively arranged.   
     
     
         2 . The heat-resistant laminated conveyer belt according to  claim 1 ,
 wherein the core has a thickness of 1.0 mm or more and a mass of 1500 g/m 2  or more.   
     
     
         3 . The heat-resistant laminated conveyer belt according to  claim 1 ,
 wherein the reinforcement layer is thermal compression-molded in the thickness direction before the reinforcement layer is incorporated into the heat-resistant laminated conveyer belt.   
     
     
         4 . The heat-resistant laminated conveyer belt according to  claim 1 , further comprising:
 a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin layer formed on the reinforcement layer.   
     
     
         5 . The heat-resistant laminated conveyer belt according to  claim 1 ,
 wherein the number of the S-twist weft yarn and the number of the Z-twist weft yarn are plural.   
     
     
         6 . A heat-resistant laminated conveyer belt comprising:
 a fluororesin-coated core obtained by impregnating an aramid fiber woven fabric in a fluororesin dispersion and drying and sintering the fabric; and   a reinforcement layer which is formed on the core through an adhesive layer and obtained by impregnating an aramid fiber woven fabric to which stretch properties are applied in a fluororesin dispersion and drying and sintering the fabric;   wherein the aramid fiber woven fabric of the core is a woven fabric by a circular loom and the woven fabric includes an S-twist weft yarn and a Z-twist weft yarn which are alternatively arranged.   
     
     
         7 . The heat-resistant laminated conveyer belt according to  claim 6 ,
 wherein the core has a thickness of 1.0 mm or more and a mass of 1500 g/m 2  or more.   
     
     
         8 . The heat-resistant laminated conveyer belt according to  claim 6 ,
 wherein the reinforcement layer which is thermal compression-molded in the thickness direction before the reinforcement layer is incorporated into the heat-resistant laminated conveyer belt.   
     
     
         9 . The heat-resistant laminated conveyer belt according to  claim 6 , further comprising:
 a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin layer formed on the reinforcement layer.   
     
     
         10 . The heat-resistant laminated conveyer belt according to  claim 6 ,
 wherein the number of the S-twist weft yarn and the number of the Z-twist weft yarn are plural.