Patent application number | Description | Published |
20120028101 | MICROPOROUS MEMBRANES AND METHODS FOR PRODUCING AND USING SUCH MEMBRANES - A microporous membrane comprising layers, wherein at least one layer comprises a first polymer having a Tm in the range of 115.0° C. to 130.0° C. and an Mw of from 5.0×10 | 02-02-2012 |
20120028102 | MICROPOROUS POLYMERIC MEMBRANES, BATTERY SEPARATORS, AND PRODUCTION METHODS THEREFOR - A multilayer microporous membrane including polymer and having a shutdown temperature of ≦130.5° C. and a storage stability of 0.3V or less. | 02-02-2012 |
20120034518 | MICROPOROUS MEMBRANES, METHODS FOR MAKING SUCH MEMBRANES, AND THE USE OF SUCH MEMBRANES AS BATTERY SEPARATOR FILM - A microporous membrane comprising polyolefin copolymer, the membrane having a shutdown temperature≦130.5° C. and a shutdown activation energy E2≧3.5×10 | 02-09-2012 |
20120070748 | MICROPOROUS MEMBRANES, METHODS FOR MAKING THESE MEMBRANES, AND THE USE OF THESE MEMBRANES AS BATTERY SEPARATOR FILMS - The invention relates to microporous membranes having high meltdown temperature, high air permeability, and high puncture strength. The invention also relates to the production of such membranes and the use of such membranes as battery separator film. | 03-22-2012 |
20120077072 | MULTI-LAYER MICROPOROUS FILM - Embodiments of the invention relate to microporous membranes that include first and second layers. The first layer includes ≦20.0 wt. % polymethylpentene and the second layer includes a compatibilizer. The invention also relates to methods for making such membranes and the use of such membranes as battery separator film. | 03-29-2012 |
20120077073 | MULTI-LAYER MICROPOROUS FILM - The invention relates to microporous membranes having at least two layers, a first layer comprising polymethylpentene and a second layer which comprises a polymer and has a composition that is not substantially the same as that of the first layer. The invention also relates to methods for making such membranes and the use of such membranes as battery separator film in, e.g., lithium ion batteries. | 03-29-2012 |
20120082899 | MICROPOROUS MEMBRANES, METHODS FOR MAKING SUCH MEMBRANES, AND THE USE OF SUCH MEMBRANES AS BATTERY SEPARATOR FILM - The invention relates to microporous membranes having high meltdown temperature, low shutdown temperature, and resistance to heat shrinkage at elevated temperature. The membranes can be produced by stretching a sheet comprising polymethylpentene, polyethylene, and diluent, and then removing the diluent. The membranes can be used as battery separator film in, e.g., lithium ion batteries. | 04-05-2012 |
20120088149 | MICROPOROUS MEMBRANES, METHODS FOR MAKING SUCH MEMBRANES, AND THE USE OF SUCH MEMBRANES AS BATTERY SEPARATOR FILM - The present invention relates to microporous membranes comprising polymer and having well-balanced permeability and heat shrinkage, especially heat shrinkage at elevated temperature. The invention also relates to methods for making such membranes, and the use of such membranes as battery separator film in, e.g., lithium ion secondary batteries. | 04-12-2012 |
20130288102 | MICROPOROUS FILM, METHODS FOR MAKING SUCH FILM, AND USE FOR SUCH FILM AS BATTERY SEPARATOR FILM - A microporous membrane includes a low melting polypropylene, the low melting polypropylene being a polypropylene homopolymer or copolymer having an MFR≧2.0×10 | 10-31-2013 |