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:
Jun. 11, 2002
Filed:
Jan. 16, 2001
Moon Jo Chung, Seoul, KR;
Nak Joong Kim, Seoul, KR;
Howtech Corporation Ltd., Seoul, KR;
Abstract
A method for manufacturing polyolefin foam beads by a continuous process is disclosed by which the polyolefin foam beads can be produced with increased efficiency and productivity. The method comprises a step of impregnating foaming agent into polyolefin resin by mixing polyolefin resin particles, water and the foaming agent in a impregnation chamber under heat and pressure, followed by a step of storing the polyolefin resin containing the foaming agent in a storing chamber under heat and pressure. Thereafter, the resin particles are subjected to a foaming step by continuously or intermittently discharging the resin particles from the storing chamber to a low pressure expansion chamber by utilizing a discharging device, in the same time period when a next batch of polyolefin resin is added and mixed in the impregnation chamber after being supplied with the resin particles from a resin supply chamber.