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. 28, 2020
Filed:
Dec. 21, 2017
Maxell, Ltd., Kyoto, JP;
MAXELL, LTD., Kyoto, JP;
Abstract
There is provided a method which includes: plasticizing and melting a thermoplastic resin to provide a molten resin in a plasticization zone of a plasticizing cylinder; allowing the molten resin to be in a starved state in a starvation zone of the plasticizing cylinder; introducing a pressurized fluid containing a physical foaming agent having a fixed pressure into the starvation zone to retain the starvation zone at the fixed pressure; bringing the molten resin in the starved state in contact with the pressurized fluid containing the physical foaming agent having the fixed pressure in the starvation zone in a state in which the starvation zone is retained at the fixed pressure; and molding the molten resin having been brought in contact with the pressurized fluid containing the physical foaming agent into the foam-molded product.