Fuel hose

Claim 2

A fuel hose having a laminated structure, comprising: an inner layer (A) comprising a fluororesin; and an outer layer (B) comprising a thermoplastic resin other than a fluororesin; wherein said inner layer (A) has an electrical conductivity and a melt flowability such that a melt flow rate is from 14 to 30 (g/10 min); and wherein at least an inside surface of said inner layer is substantially smooth; wherein a surface roughness Rmax of said inside surface of the inner layer is at most 100 μm.

Claim 3

The fuel hose according to claim 1 , which has a corrugated region at a midpoint thereof.

Claim 4

The fuel hose according to claim 1 , wherein a tensile strength at break of the inner layer is higher than 21 MPa.

Claim 5

The fuel hose according to claim 1 , wherein a volume resistivity of the inner layer is from 1 to 10 9 (Ω·cm).

Claim 6

The fuel hose according to claim 1 , wherein the inner layer comprises an electrical conductivity-imparting agent.

Claim 7

The fuel hose according to claim 5 , wherein said electrical conductivity-imparting agent is carbon black.

Claim 8

The fuel hose according to claim 1 , wherein said fluororesin of the inner layer is an ethylene/tetrafluoroethylene copolymer.

Claim 9

The fuel hose according to claim 7 , wherein the ethylene/tetrafluoroethylene copolymer is a copolymer of 60-30 molar percent of ethylene, 20-60 molar percent of tetrafluoroethylene, and 0-40 molar percent of other copolymerizable monomer.

Claim 10

The fuel hose according to claim 8 , wherein the other copolymerizable monomer is present and is α-olefin.

Claim 11

The fuel hose according to claim 8 , wherein the other copolymerizable monomer is present and is a fluoroolefin.

Claim 12

The fuel hose according to claim 8 , wherein the other copolyermizable monomer is present and is a vinyl ether.

Claim 13

The fuel hose according to claim 8 , wherein the other copolymerizable monomer is present and is a (meth)acrylate.

Claim 14

The fuel hose according to claim 1 , wherein said thermoplastic resin of the outer layer is polyamide 6, polyamide 11 or polyamide 12.

Claim 15

The fuel hose according to claim 1 , wherein the inner layer and the outer layer are melt-bonded via a melt adhesive fluorinated adhesive resin layer.

Claim 16

The fuel hose according to claim 1 , wherein the inner layer and the outer layer are formed by co-extrusion molding.

Claim 17

The fuel hose according to claim 1 , having an outer diameter of from 5 to 30 mm, and an inner diameter of from 3 to 25 mm.

Claim 18

The fuel hose according to claim 1 , having a corrugated region at a midpoint thereof.

Claim 19

The fuel hose according to claim 1 , having a corrugated region over the entire length of the hose.

Claim 20

The fuel hose according to claim 1 , having an adhesive strength of at least 20 (N/cm).

Claim 21

A method of piping fuel, which comprises piping said fuel through the fuel hose of claim 1 .

Claim 22

The method of claim 20 , wherein said fuel is gasoline comprising alcohol or an aromatic compound.

Claim 23

The fuel hose according to claim 1 , which is obtained by molding at a withdrawing speed of at least 15 m/min.

Claim 24

The fuel hose according to claim 22 , which does not exhibit melt facture as detected by visual observation.

Claim 25

A fuel hose having a laminated structure, comprising: an inner layer (A) comprising a fluororesin; and an outer layer (B) comprising a thermoplastic resin other than a fluororesin; wherein said inner layer (A) has an electrical conductivity and a melt flowability such that a melt flow rate is from 14 to 30 (g/10 min); and wherein at least an inside surface of said inner layer is substantially smooth; wherein said fluororesin of the inner layer is an ethylene/tetrafluoroethylene copolymer which is a copolymer of 60-30 molar percent of ethylene, 20-60 molar percent of tetrafluoroethylene, and 0-40 molar percent of other copolymerizable monomer; wherein the other copolymerizable monomer is present; and wherein said other copolymerizable monomer is selected from the group consisting of an α-olefin, a fluoroolefin, a vinyl ether and a (meth)acrylate.

Claim 26

A fuel hose having a laminated structure, comprising: an inner layer (A) comprising a fluororesin; and an outer layer (B) comprising a thermoplastic resin other than a fluororesin; wherein said inner layer (A) has an electrical conductivity and a melt flowability such that a melt flow rate is from 14 to 30 (g/10 min); and wherein at least an inside surface of said inner layer is substantially smooth; wherein said fluororesin of the inner layer is an ethylene/tetrafluoroethylene copolymer which is a copolymer of 60-30 molar percent of ethylene, 20-60 molar percent of tetrafluoroethylene, and 0-40 molar percent of other copolymerizable monomer; wherein the other copolymerizable monomer is present; and wherein said other copolymerizable monomer is selected from the group consisting of an α-olefin, a fluoroolefin, a vinyl ether and a (meth)acrylate.