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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.:

US 11007699 B1

PDFFull Text
Date of Patent:
May. 18, 2021

Filed:

Mar. 02, 2018

Method of producing film, method of producing separator, and method of producing plasticizer

Applicant:

Sumitomo Chemical Company, Limited, Tokyo, JP;

Inventors:

Daizaburo Yashiki, Niihama, JP;

Shinichi Yamate, Niihama, JP;

Assignee:

SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;

Attorney:

Panitch Schwarze Belisario & Nadel LLP

Primary Examiner:

Galen H Hauth

Int. Cl.
CPC ...
B29C 48/25 (2019.01); B29C 55/04 (2006.01); H01M 2/14 (2006.01); H01M 2/16 (2006.01); B29C 48/08 (2019.01); B29C 48/00 (2019.01); B29D 7/01 (2006.01); B29B 7/60 (2006.01); B29C 48/27 (2019.01); B29K 105/00 (2006.01); B29L 31/34 (2006.01); H01M 10/0525 (2010.01); B29C 55/16 (2006.01); B29K 105/04 (2006.01); B29K 105/26 (2006.01); B29C 48/275 (2019.01); H01M 50/403 (2021.01); H01M 50/411 (2021.01); H01M 50/449 (2021.01);
U.S. Cl.
CPC ...
B29C 48/267 (2019.02); B29B 7/60 (2013.01); B29C 48/0018 (2019.02); B29C 48/08 (2019.02); B29C 48/274 (2019.02); B29C 55/04 (2013.01); B29D 7/01 (2013.01); H01M 50/403 (2021.01); H01M 50/411 (2021.01); B29C 48/278 (2019.02); B29C 55/16 (2013.01); B29K 2023/06 (2013.01); B29K 2105/0038 (2013.01); B29K 2105/0044 (2013.01); B29K 2105/041 (2013.01); B29K 2105/26 (2013.01); B29L 2031/3468 (2013.01); H01M 10/0525 (2013.01); H01M 50/449 (2021.01);
Abstract

A method of producing a film in accordance with an aspect of the present invention includes: a first kneading and forming step of forming a composition obtained by kneading a polyolefin resin and a plasticizer; a stretching step of stretching the composition; a composition cleaning step of immersing the composition in a cleaning solvent and removing the plasticizer; a separation step of separating, from the cleaning solvent which has been used in the cleaning step, the plasticizer which has been eluted in the cleaning solvent; and a second kneading and forming step of forming a composition obtained by kneading a polyolefin resin and the plasticizer which has been separated in the separation step.

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