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:
May. 24, 2011
Filed:
Feb. 12, 2008
Young Keun Lee, Daejeon, KR;
Jang Weon Rhee, Daejeon, KR;
Won Young Cho, Daejeon, KR;
Jung Moon Sung, Seoul, KR;
Byoung Cheon JO, Daejeon, KR;
Chol Ho Lee, Daejeon, KR;
IN Hwa Jung, Daejeon, KR;
Byung Rae Jung, Daejeon, KR;
Young Keun Lee, Daejeon, KR;
Jang Weon Rhee, Daejeon, KR;
Won Young Cho, Daejeon, KR;
Jung Moon Sung, Seoul, KR;
Byoung Cheon Jo, Daejeon, KR;
Chol Ho Lee, Daejeon, KR;
In Hwa Jung, Daejeon, KR;
Byung Rae Jung, Daejeon, KR;
SK Energy Co., Ltd., Seoul, KR;
Abstract
Disclosed is a microporous high density polyethylene film for a battery separator and a method of producing the same. The microporous high density polyethylene film includes high density polyethylene with a weight average molecular weight of 2×10-5×10, containing 5 wt % or less molecule with a molecular weight of 1×10or less. The microporous high density polyethylene film has tensile strengths of 1,100 kg/cmor more in transverse and machine directions respectively, a puncture strength of 0.22 N/μm or more, a gas permeability (Darcy's permeability constant) of 1.3×10Darcy or more, and shrinkages of 5% or less in machine and transverse directions, respectively. Particularly, the microporous high density polyethylene film has an excellent extrusion-compoundabiliy and stretchability and a high productivity, and can improve the performances and stability of a battery produced using the same.