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:
Apr. 22, 1997
Filed:
May. 12, 1995
JSP Corporation, Tokyo, JP;
Abstract
An expansion-molded article of a polyolefin resin, which is high in fusion-bonding strength and excellent in water permeability and compressive strength and has open voids, and a production process thereof are disclosed. The expansion-molded article is made of tubular foamed particles with a through-hole, whose d.sub.MIN is at least 1.5 mm and whose d.sub.MIN /D.sub.MIN value is 0.25-0.85 wherein d.sub.MIN is a minimum diameter of the hole in sections perpendicular to the direction of the hole and D.sub.MIN is a minimum outer diameter of the foamed particle in a section that d.sub.MIN has been provided. The production process includes filling the tubular foamed particles with a through-hole, whose d.sub.MIN and d.sub.MIN /D.sub.MIN are at least 1.5 mm and 0.25-0.85, respectively, into a mold and then molding the foamed particles under heat, whereby the foamed particles are fusion-bonded to one another.