The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 2005
Filed:
Jul. 03, 2002
Norio Watanabe, Aichi-ken, JP;
Kenichi Mitsui, Aichi-ken, JP;
Norio Watanabe, Aichi-ken, JP;
Kenichi Mitsui, Aichi-ken, JP;
Toyoda Gosei, Co., Ltd., Aichi-ken, JP;
Abstract
A plastic pipeis a pipe utilized in a cooling water systems, and the bonding strength of each layer is heightened, and resistance capabilities of the antifreeze solution are enhanced. The plastic pipecomprises an inner layerformed from either a polyphenylene sulfide or an aromatic polysulfide, which is a denatured substance thereof, an intermediate layerwhich is a mixture of PPS resin and a polyamide resin, and an outer layerincluding a polyamide resin. The inner layeris formed such that permeation of an antifreeze, which has mainly ethylene glycol, is less than 3.0 g/mper day. The resistance capabilities of the antifreeze solution can be achieved by making the thickness of the inner layer0.2 mm or greater.