发明名称 |
MICROPOROUS POLYOLEFIN MEMBRANE, ITS PRODUCTION METHOD, BATTERY SEPARATOR, AND BATTERY |
摘要 |
A microporous polyolefin membrane having a structure in which its pore size distribution curve obtained by mercury intrusion porosimetry has at least two peaks, which is produced by extruding a melt-blend of a polyethylene resin containing 7% or less by mass of ultra-high-molecular-weight polyethylene having a weight-average molecular weight of 1 x 106 or more, and a membrane-forming solvent, stretching a gel-like sheet obtained by cooling an extrudate, washing it, stretching the resultant microporous membrane to 1.1-1.8 fold in at least one direction, and heat-setting it at a temperature in a range of the stretching temperature of the microporous membrane plus or minus 5 degrees centigrade. |
申请公布号 |
KR20090013185(A) |
申请公布日期 |
2009.02.04 |
申请号 |
KR20087027099 |
申请日期 |
2007.04.09 |
申请人 |
TONEN CHEMICAL CORPORATION |
发明人 |
TAKITA KOTARO;KIKUCHI SHINTARO |
分类号 |
C08J5/22;C08J9/00;C08L23/00;H01M2/16 |
主分类号 |
C08J5/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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