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. 20, 2012
Filed:
May. 24, 2007
Young-keun Lee, Daejeon, KR;
Jang-weon Rhee, Daejeon, KR;
Jung-moon Sung, Seoul, KR;
Byoung-cheon JO, Daejeon, KR;
Young-Keun Lee, Daejeon, KR;
Jang-Weon Rhee, Daejeon, KR;
Jung-Moon Sung, Seoul, KR;
Byoung-Cheon Jo, Daejeon, KR;
SK Innovation Co., Ltd., , KR;
Abstract
The present invention discloses a microporous high-density polyethylene film for a battery separator, and process for preparing the same. The microporous high-density polyethylene film according to the present invention comprises of high-density polyethylene with weight average molecular weight of 2×10˜4×10, containing not more than 5 wt % of molecules with molecular weight of 1×10or less and not more than 5 wt % of molecules with molecular weight of 1×10or more, and has the properties of puncture strength of 0.22 N/μm or more, Darcy's permeability constant of 1.8×10Darcy or more, and shrinkage of 4% or less in machine and transverse direction, respectively. Particularly, the microporous high-density polyethylene film has excellent extrusion-compoundability and stretchability with high productivity and enhances performances and stability of the battery using the film.