Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Separator – retainer or spacer insulating structure
Reexamination Certificate
2005-04-12
2005-04-12
Bell, Bruce F. (Department: 1746)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Separator, retainer or spacer insulating structure
C429S147000, C429S247000, C429S248000, C429S249000, C429S250000, C029S623100, C521S027000
Reexamination Certificate
active
06878484
ABSTRACT:
An object of the present invention is to provide a thin battery separator having an excellent nitrate group trapping performance and a high piercing strength. The inventive separator for a secondary battery, which can accomplish such an object, is made of a resin composition mainly containing a polyolefin having a hydrophilic functional group, wherein the resin composition has a content (ratio to a total resin amount) of a low-density polyethylene of 20 mass % or less, a piercing strength of 5 to 100 N, a Metsuke of 20 to 75 g/m2, a thickness of 15 to 150 μm, and an unneutralized hydrophilic functional group amount of 1×10−3to 5×10−2mol/m2.
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patent: 6042970 (2000-03-01), Senyarich et al.
patent: 6607859 (2003-08-01), Tanaka et al.
patent: 10326607 (1998-12-01), None
patent: 2000230074 (2000-08-01), None
patent: 2000248095 (2000-09-01), None
Takimoto Naohiko
Tanaka Toshio
Yamaguchi Hiroki
Yamashita Masahiro
Bell Bruce F.
Kenyon & Kenyon
Toyo Boseki Kabushiki Kaisha
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