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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 9803057 B1

PDFFull Text
Date of Patent:
Oct. 31, 2017

Filed:

Jul. 28, 2014

Method for preparing microporous polyolefin film by thermally-induced phase separation method

Applicant:

Lg Chem, Ltd., Seoul, KR;

Inventors:

Bong-Tae Kim, Daejeon, KR;

Heon-Sik Song, Daejeon, KR;

Seung-Yup Lee, Daejeon, KR;

Kyoung-Min Kim, Guri-si, KR;

Assignee:

LG CHEM, LTD., Seoul, KR;

Attorney:

Rothwell, Figg, Ernst & Manbeck, P.C.

Primary Examiner:

Mike M Dollinger

Assistant Examiner:

Christina Wales

Int. Cl.
CPC ...
C08J 5/18 (2006.01); C08L 23/02 (2006.01); B29C 47/00 (2006.01); B29D 7/01 (2006.01); B29L 7/00 (2006.01);
U.S. Cl.
CPC ...
C08J 5/18 (2013.01); B29C 47/0071 (2013.01); C08L 23/02 (2013.01); B29D 7/01 (2013.01); B29L 2007/008 (2013.01); C08J 2201/03 (2013.01); C08J 2201/0522 (2013.01); C08J 2323/02 (2013.01); C08J 2323/06 (2013.01);
Abstract

The present invention discloses a method for preparing a microporous polyolefin film comprising: a step of injecting a composition comprising polyolefin 30 to 60 wt % and a diluent mixture comprising a diluent, which can make liquid-liquid phase separation with the polyolefin thermodynamically 40 to 70 wt %, into an extruding machine, and melting and kneading thereof to prepare a single phase melt; and a step of extruding the melt while conducting liquid-liquid phase separation by passing through a section having the temperature below the liquid-liquid phase separation temperature and forming thereof in the form of a sheet, and a microporous polyolefin film prepared according to the method.

Find Patent Forward Citations

Kim, Bong-Tae. (2017). Method for preparing microporous polyolefin film by thermally-induced phase separation method (U.S. Patent No. 9803057). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9803057

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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