Liquid transfer tube
AssigneeNitta Moore Company
InventorTodomu Nishino
Life of this patent
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Abstract
A fuel transfer tube is capable of being used reliably for transferring alcohol, gasoline, or the mixure thereof. The fuel transfer tube has a polyamide resin layer containing metaxylene group, thickness of which is 0.3mm or less, and a polyolefin resin layer. The tube is formed by simultaneous extrusion method.
Claims11
A flexible, alcohol resistant, gasoline resistant fuel transfer tube having controlled gasoline permeation formed by simultaneous extrusion, comprising:
- at least a first layer and a second layer;
- said first layer having a polyamide resin containing at least 70 mol % in the molecular chain of the constituent units composed of metaxylene diamine or mixed xylene diamine containing metaxylene diamine and paraxylene diamine wherein said paraxylene diamine content is not more than 30% thereof, and an .alpha.,.omega.-aliphatic dicarboxylic acid having 4 to 10 carbon atoms;
- said polyamide has a relative viscosity of at least 1.5;
- said first layer being no more than 0.3 mm in thickness;
- and
- said second layer having a polyolefin resin.
A flexible, alcohol resistant, gasoline resistant fuel transfer tube having controlled gasoline permeation formed by simultaneous extrusion, comprising:
- a polyolefin resin layer;
- a polyamide resin layer on a first side of said polyolefin resin layer;
- said polyamide resin layer containing at least 70 mol % in the molecular chain of the constituent units composed of metaxylene diamine or mixed xylene diamine containing metaxylene diamine and paraxylene diamine wherein said paraxylene diamine content is not more than 30% thereof, and an .alpha.,.omega.-aliphatic dicarboxylic acid having 4 to 10 carbon atoms;
- said polyamide resin layer being no more than 0.3 mm in thickness;
- said polyamide having a relative viscosity of at least 1.5;
- a nylon layer on a second side of said polyolefin resin layer;
- and said nylon layer containing an elastomer.
A flexible, alcohol resistant, gasoline resistant fuel transfer tube having controlled gasoline permeation formed by simultaneous extrusion, comprising:
- a polyolefin resin layer;
- a nylon layer on a first side of said polyolefin resin layer;
- a polyamide resin layer on a second side of said nylon layer;
- said polyamide having a relative viscosity of at least 1.5;
- said polyamide resin layer containing at least 70 mol % in the molecular chain of the constituent units composed of metaxylene diamine or mixed xylene diamine containing metaxylene diamine and paraxylene diamine wherein said paraxylene diamine content is not more than 30% thereof, and an .alpha.,.omega.-aliphatic dicarboxylic acid having 4 to 10 carbon atoms;
- said polyamide resin layer being no more than 0.3 mm in thickness;
- and
- a polyethylene layer on a second side of said polyolefin resin layer.
Dependencies are inferred from the claim text.