Fuel hose

Abstract

A fuel hose which is less permeable to automotive fuels and is excellent in sour gasoline resistance. The fuel hose comprises at least one constituent layer including an inner layer, at least the inner layer comprising a polyester resin and particles each having a core-shell structure, the particles being present in a proportion of 5 to 60 parts by weight based on 100 parts by weight of the polyester resin.

What is claimed is:  
     
         1 . A fuel hose comprising at least one constituent layer including an inner layer, at least the inner layer comprising a polyester resin and particles each having a core-shell structure, the particles being present in a proportion of 5 to 60 parts by weight based on 100 parts by weight of the polyester resin.  
     
     
         2 . A fuel hose as set forth in  claim 1 , wherein at least the inner layer further comprises an electrically conductive material.  
     
     
         3 . A fuel hose as set forth in  claim 1 , wherein the at least one constituent layer includes a plurality of constituent layers, wherein the constituent layers other than the layer comprising the polyester resin and the particles each comprise a polyester resin material.  
     
     
         4 . A fuel hose as set forth in  claim 1 , the fuel hose having a plural-layer structure, and further comprising an outermost layer comprising a polyamide.  
     
     
         5 . A fuel hose as set forth in  claim 1 , the fuel hose having a plural-layer structure, and further comprising at least one intermediate layer provided between the inner layer and an outermost layer, wherein the at least one intermediate layer comprises at least one second polyester resin selected from the group consisting of polybutylene terephthalate, polybutylene naphthalate, polyethylene terephthalate and polyethylene naphthalate, wherein the intermediate layer has an outer peripheral surface subjected to an electric discharge treatment, wherein a constituent layer provided on the outer peripheral surface of the intermediate layer essentially comprises an amine-rich resin.  
     
     
         6 . A fuel hose as set forth in  claim 1 , the fuel hose having a plural-layer structure, and further comprising at least one intermediate layer provided between the inner layer and an outermost layer, wherein the at least one intermediate layer comprises at least one second polyester resin selected from the group consisting of polybutylene terephthalate, polybutylene naphthalate, polyethylene terephthalate and polyethylene naphthalate.  
     
     
         7 . A fuel hose as set forth in  claim 6 , wherein the outermost layer comprises at least one selected from the group consisting of a polybutylene terephthalate thermoplastic elastomer, a polybutylene naphthalate thermoplastic elastomer, a blend of polybutylene terephthalate and an elastomer component, and a polybutylene terephthalate material containing particles each having a core-shell structure.  
     
     
         8 . A fuel hose as set forth in  claim 6 , wherein constituent layers in contact with inner and outer surfaces of the intermediate layer comprising the second polyester resin each comprise at least one of a blend of polybutylene terephthalate and an elastomer component, and a polybutylene terephthalate material containing particles each having a core-shell structure.  
     
     
         9 . A fuel hose as set forth in  claim 4 , further comprising at least one intermediate layer provided between the inner layer and the outermost layer, wherein the at least one intermediate layer comprises at least one second polyester resin selected from the group consisting of polybutylene terephthalate, polybutylene naphthalate, polyethylene terephthalate and polyethylene naphthalate.