Highly porous separator foil
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United States of America Patent
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Jan 24, 2017
Grant Date -
Mar 26, 2015
app pub date -
Oct 10, 2014
filing date -
Apr 26, 2010
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to a biaxially oriented single- or multilayer porous foil, the porosity of which is generated by transformation of ss-crystalline polypropylene during orientation of the foil. The Gurley value of the foil is <250 s. The invention also relates to a process for producing the foil by using a low transverse stretching velocity for the transverse orientation process.
First Claim
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International Classification(s)
- C08J:WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTE....
- B29C:SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTAN....
- H01M:PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT....
- B29D:PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FRO....
- B29K:INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, ....
- C08L:COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- H01G:CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWI....
- C08K:USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUB....
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