Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1995-05-12
1997-04-22
Choi, Kathleen
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
428220, 4283135, 4283142, 4283166, B29D 2200
Patent
active
056227566
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.
REFERENCES:
patent: 4692507 (1987-09-01), Akiyama et al.
patent: 4755408 (1988-07-01), Noel
patent: 5284431 (1994-02-01), Kuwabara et al.
patent: 5340841 (1994-08-01), Tokoro et al.
Hinokawa Akira
Shioya Satoru
Tokoro Hisao
Choi Kathleen
JSP Corporation
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