US 2026/0227010 A1Published application

Flexible, fatigue resistant, low permeation fuel dispensing hose using f-tpv barrier layer

AssigneeContiTech Deutschland GmbH

InventorsLance Miller, Andrew J. Speidel, Jeffery Lofgren

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Abstract

A fuel dispenser system includes a fuel dispenser hose having a tube layer, a barrier layer, an intermediate layer, a reinforcement layer, and a cover layer. The barrier layer is formed from a fluoro-thermoplastic vulcanizate (F-TPV), which is selected and constructed to provide: (i) a flexural modulus or tensile modulus of 700 MPa or less; (ii) an elongation at break of greater than 250%; (iii) a fatigue performance of greater than 250,000 cycles in tension and greater than 1 million cycles in compression; (iv) a bond strength between the F-TPV barrier layer and both the tube layer and intermediate layer of greater than a tear strength of the respective tube and intermediate layer, which is greater than at least 15 lbf/in; and (vi) a permeation rate of the overall hose which is less than 10 g/m2/day with CE10 fuel; thereby making the hose suitable for use in the fuel dispensing system.

Claims14

Dependent claims

A fuel dispenser system, comprising:

a fuel dispenser fluidly coupled to a source of fuel;
a fuel dispenser hose fluidly coupled to the fuel dispenser for dispensing the fuel through a nozzle coupled to an end of the fuel dispenser hose;
wherein the fuel dispenser hose comprises:
an inner tube layer defining an internal lumen of the hose, the inner tube layer being formed from a first elastomeric composition having at least one fluoro-thermoplastic vulcanizate adhesion promoting agent;
a barrier layer arranged over the inner tube layer, wherein the barrier layer is formed from a fluoro-thermoplastic vulcanizate (F-TPV);
an intermediate layer arranged over the barrier layer, wherein the intermediate layer is formed from a second elastomeric composition having at least one fluoro-thermoplastic vulcanizate adhesion promoting agent;
a reinforcement layer arranged over the intermediate layer, wherein the reinforcement layer is formed with braided steel wire;
and
an outermost cover layer arranged over the reinforcement layer, wherein the cover layer is formed from a third elastomeric composition;
wherein the F-TPV barrier layer provides:
(i) a flexural modulus according to ASTM D790 or a tensile modulus according to ASTM D638 of 700 MPa or less;
(ii) an elongation at break of greater than 250% when tested according to ASTM D638;
(iii) a fatigue performance of greater than 250,000 cycles in tension and greater than 1 million cycles in compression, when tested according to ASTM D3629;
(iv) a bond strength between the F-TPV barrier layer and the inner tube layer of greater than a tear strength of the inner tube layer, which is greater than at least 15 lbf/in, when tested according to ASTM D413;
(v) a bond strength between the F-TPV barrier layer and the intermediate layer of greater than a tear strength of the intermediate layer, which is greater than at least 15 lbf/in, when tested according to ASTM D413;
and
(vi) a permeation rate of the overall hose which is less than 10 g/m2/day with CE10 fuel, when tested according to UL330.

14 more elements

A method of use of selecting materials and construction of a reinforced multilayer fuel dispensing hose for its specified use in a fuel dispensing system, comprising:

selecting a tube material and construction to form an inner tube layer based at least upon inner tube properties including flexibility and chemical resistance to hydrocarbon fuel when used in the fuel dispensing system;
constructing the inner tube layer with the selected tube material and construction as the innermost layer of the hose which defines a lumen, wherein the selected tube material is an elastomeric composition having at least one fluoro-thermoplastic vulcanizate adhesion promoting agent;
and the construction of the inner tube layer with the selected elastomeric composition satisfies the inner tube properties when the hose is cured;
selecting a barrier material and construction to form a barrier layer based at least upon barrier layer properties;
constructing the barrier layer with the selected barrier material and construction outwardly of the tube layer, wherein the selected barrier material is a fluoro-thermoplastic vulcanizate (F-TPV), and the construction of the barrier layer with the selected F-TPV satisfies the barrier layer properties when the hose is cured;
selecting an intermediate layer material and construction to form an intermediate layer based at least upon intermediate layer properties;
constructing the intermediate layer with the selected intermediate layer material and construction outwardly of the barrier layer, wherein the selected intermediate layer is an elastomeric composition having at least one fluoro-thermoplastic vulcanizate adhesion promoting agent, and the construction of the intermediate layer with the selected elastomeric composition satisfies the intermediate layer properties when the hose is cured;
selecting a reinforcement material and construction to form a reinforcement layer based at least upon reinforcement layer properties including flexibility without kinking and strength to resist burst pressure when used in the fuel dispensing system;
constructing the reinforcement layer with the selected reinforcement material and construction outwardly of the barrier layer, wherein the selected reinforcement material and construction includes braided steel wire, and the construction of the reinforcement layer with the selected braided steel wire satisfies the reinforcement layer properties when the hose is cured;
selecting a cover material and construction to form a cover layer based at least upon cover layer properties including flexibility and environmental resistance when used in the fuel dispensing system;
constructing the cover layer with the selected cover material and construction outwardly of the reinforcement layer and forming the outermost layer of the hose, wherein the selected cover material is an elastomeric composition, and the construction of the cover layer with the selected elastomeric composition satisfies the cover layer properties when the hose is cured;
wherein the selecting of the barrier layer properties and constructing of the barrier layer with the selected F-TPV that satisfies the barrier layer properties is based at least upon the F-TPV providing:
(i) a flexural modulus according to ASTM D790 or a tensile modulus according to ASTM D638 of 700 MPa or less;
(ii) an elongation at break of greater than 250% when tested according to ASTM D638;
(iii) a fatigue performance of greater than 250,000 cycles in tension and greater than 1 million cycles in compression, when tested according to ASTM D3629;
(iv) a bond strength between the F-TPV barrier layer and the inner tube layer of greater than a tear strength of the inner tube layer, which is greater than at least 15 lbf/in, when tested according to ASTM D413;
(v) a bond strength between the F-TPV barrier layer and the intermediate layer of greater than a tear strength of the intermediate layer, which is greater than at least 15 lbf/in, when tested according to ASTM D413;
and
(vi) a permeation rate of the overall hose which is less than 10 g/m2/day with CE10 fuel, when tested according to UL330;
the method further comprising:
curing the reinforced multilayer fuel dispensing hose with its respectively constructed layers, such that each of the respective layers, as constructed with its selected material, satisfies its respective properties, and the overall hose it is suitable for use in the fuel dispensing system.

18 more elements

Dependencies are inferred from the claim text.