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:
Nov. 15, 2011
Filed:
Jan. 26, 2007
Young Keun Lee, Daejeon, KR;
Jang Weon Rhee, Daejeon, KR;
Jung Moon Sung, Seoul, KR;
Byoung Cheon JO, Daejeon, KR;
Chol Ho Lee, Daejeon, KR;
Young Keun Lee, Daejeon, KR;
Jang Weon Rhee, Daejeon, KR;
Jung Moon Sung, Seoul, KR;
Byoung Cheon Jo, Daejeon, KR;
Chol Ho Lee, Daejeon, KR;
SK Innovation Co., Ltd., Seoul, KR;
Abstract
Disclosed herein is a microporous polyethylene film for a battery separator and a method of producing the same. The microporous polyethylene film is made from a resin composition. The resin composition comprises 100 parts by weight of a polyethylene composition including 10-50 wt % polyethylene having a weight average molecular weight of from 2×10to less than 5×10(component I) and 90-50 wt % diluent (component II), and 0-150 parts by weight of inorganic powder (component III). The film has a puncture strength of 0.20 N/μm or more and a gas permeability (Darcy's permeability constant) of 1×10Darcy or more. The microporous polyethylene film has excellent physical properties, thus improving the performance and stability of a battery.