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:
Feb. 11, 2003
Filed:
Feb. 08, 2001
Sanwa Kako Co., Ltd., Kyoto, JP;
Abstract
A method is disclosed that makes a open cell cellular body of polyethylene resin material in non-crosslinked structure, which has a maximum degree of cell interconnection, is good in recyclability and excellent in heat resistance or resistance to heat distortion. The method includes the steps of adding 4,4′-oxy bis (benzene sulfonyl hydrazide) to a polyethylene resin material to form a foamable composition and shaping the foamable composition of polyethylene resin material, heating the shaped foamable composition of polyethylene resin material to be foamed under an atmospheric pressure to form a cellular body thereof with cells therein, and mechanically deforming the cellular body of polyethylene resin material to cause the cells therein to be interconnected, thereby producing the open cell cellular body desired. The produced continuous cellular body is rendered heat resistant by irradiating the same or the formed cellular body with a beam of electrons.