Method of improving airtightness of hydraulic or pneumatic device with polyamide resin tube
AssigneeUbe Industries, Ltd.
InventorsYoshiro Iwata, Shinya Matsuda
Life of this patent
Estimating the term…
Abstract
A hydraulic or pneumatic device is provided, which comprises a tube comprising a polyamide resin composition comprising (A) from 70 to 97% by weight, based on the weight of the polyamide resin composition, of a polyamide resin and (B) from 3 to 30% by weight, based on the weight of the polyamide resin composition, of a plasticizer comprising an ester of p- and/or o-hydroxybenzoic acid with a C12–C22 aliphatic alcohol having a branched chain and a component comprising a rubber compound comprising a polar rubber as a main component, and which exhibits a high reliability over an extended period of time.
Claims6
A method for improving the airtightness of a hydraulic or pneumatic device comprising:
- providing a hydraulic or pneumatic tube comprising a polyamide resin composition comprising:
- (A) from 70 to 97% by weight, based on the weight of the polyamide resin composition, of a polyamide resin and
- (B) from 3 to 30% by weight, based on the weight of the polyamide resin composition, of a plasticizer comprising an ester of at least one of p-hydroxybenzoic acid and o-hydroxybenzoic acid with a C12–C22 aliphatic alcohol having a branched chain;
- and
- combining the tube with at least one clamping part containing a component comprising a rubber compound comprising a polar rubber as a main ingredient, wherein the component comprising a rubber compound is used as a sealing material in the clamping part.
A method for improving the airtightness of a hydraulic or pneumatic device comprising:
- providing a hydraulic or pneumatic tube comprising a polyamide resin composition comprising:
- (A) from 50 to 96% by weight, based on the weight of the polyamide resin composition, of a polyamide resin,
- (B) from 3 to 30% by weight, based on the weight of the polyamide resin composition, of a plasticizer comprising an ester of at least one of p-hydroxybenzoic acid and o-hydroxybenzoic acid with a C12–C22 aliphatic alcohol having a branched chain, and
- (C) from 1 to 20% by weight, based on the weight of the polyamide resin composition, of an impact-resistant material;
- and
- combining the tube with at least one clamping part containing a component comprising a rubber compound comprising a polar rubber as a main ingredient, wherein the component comprising a rubber compound is used as a sealing material in the clamping part.
Dependencies are inferred from the claim text.