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:
Aug. 05, 2014
Filed:
Apr. 08, 2009
Jean Lee, Daejeon, KR;
Jongmoon Sung, Daejeon, KR;
Cholho Lee, Daejeon, KR;
Yongkyoung Kim, Daejeon, KR;
Youngkeun Lee, Seoul, KR;
Jean Lee, Daejeon, KR;
Jongmoon Sung, Daejeon, KR;
Cholho Lee, Daejeon, KR;
Yongkyoung Kim, Daejeon, KR;
Youngkeun Lee, Seoul, KR;
SK Innovation Co., Ltd., Seoul, KR;
Abstract
Provided is a microporous polyolefin composite film with a thermally stable porous layer at high temperature, particularly, to the microporous polyolefin composite film in which the thermally stable porous layer at high temperature, which contains organic or inorganic particles and heat-resistant polymer having aromatic ring in main chain and also having a melting temperature or a glass transition temperature of 170 to 500° C., is formed on one surface or both surfaces of a polyolefin microporous film by a phase separation, wherein the composite film with the porous layer has a permeability of 1.5×10to 20.0×10Darcy, a meltdown temperature of 160 to 300° C., a MD/TD shrinkage of 1 to 40% at a temperature of 150° C. for 60 minutes.