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:
Feb. 12, 2019
Filed:
Jul. 29, 2015
SK Innovation Co., Ltd., Seoul, KR;
Gwigwon Kang, Daejeon, KR;
Dongjin Joo, Daejeon, KR;
Yongkyoung Kim, Daejeon, KR;
Jaewoong Kim, Daejeon, KR;
Hyungmin Kim, Daejeon, KR;
Jungmoon Sung, Daejeon, KR;
Youngjun Woo, Daejeon, KR;
Jang-weon Rhee, Daejeon, KR;
Inhwa Jung, Daejeon, KR;
SK Innovation Co., Ltd., Seoul, KR;
Abstract
Provided is a manufacturing method of a polyolefin-based multilayer composite porous film, including: a) forming a composition including a polyolefin resin and diluent to a sheet; b) stretching the sheet and extracting the diluent to manufacture a film; c) performing heat-treatment on the manufactured film; and d) coating one surface or both surfaces of the heat-treated film with a coating solution containing a heat resistant resin, wherein step c) and step d) are continuously performed.