发明名称 |
Multi-layer, microporous polyolefin membrane, its production method, battery separator and battery |
摘要 |
The invention relates to polyolefin membranes and membrane precursors comprising polyethylene and polypropylene. The polyolefin membrane can be a microporous polyolefin membrane comprising a first microporous layer and at least one second microporous layers where the first and second layers contain polypropylene and polyethylene, and the amount of polyethylene in the first layer is at least about 80 wt. % and the amount of polyethylene in the second layer is at least about 50 wt. %. The amount of polyethylene is higher in the first microporous layer than in the second microporous layer, and the total amount of the polyethylene in the first and second microporous layers is at least about 61 wt. %, based on the weight of the multi-layer, microporous polyolefin membrane. |
申请公布号 |
US8709640(B2) |
申请公布日期 |
2014.04.29 |
申请号 |
US20080675717 |
申请日期 |
2008.08.29 |
申请人 |
KIKUCHI SHINTARO;TAKITA JUNKO;TORAY BATTERY SEPARATOR FILM CO., LTD |
发明人 |
KIKUCHI SHINTARO;TAKITA KOTARO |
分类号 |
H01M2/16 |
主分类号 |
H01M2/16 |
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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