Core material for piping

Abstract

A core material for piping comprising a cord portion and a belt portion which are integrally molded from a synthetic resin material and further having a hook portion integrally formed on one surface of at least any one of the cord portion and the belt portion, the core material for piping being provided to a required position of a facing sheet material, wherein hardness of the hook portion is set higher than the hardness of the cord portion and the belt portion, thereby having a required engagement strength while securing easiness of bending of the cord portion and the belt portion.

1 . A core material for piping comprising a cord portion and a belt portion which are molded from a synthetic resin material and having a hook portion integrally formed on one surface of at least any one of the cord portion and the belt portion, the core material for piping being provided to a required position of a facing sheet material of, such as a seat, wherein 
 hardness of the hook portion is set higher than the hardness of the cord portion and the belt portion.    
     
     
         2 . The core material for piping according to  claim 1 , wherein the cord portion and the belt portion are composed of elastomer resin, and the hook portion is composed of thermoplastic resin.  
     
     
         3 . The core material for piping according to  claim 1 , wherein the hook portion is provided continuously or intermittently on entire one surface of at least any one of the cord portion and the belt portion.  
     
     
         4 . The core material for piping according to  claim 3 , wherein a surface of the core material for piping on which hook pieces are formed is a flat plane.