| Patent application number | Description | Published |
|---|
| 20090008816 | METHOD FOR PRODUCING MICROPOROUS POLYOLEFIN MEMBRANE AND MICROPOROUS MEMBRANE - A microporous polyolefin membrane having excellent compression resistance is obtained by stretching a gel molding comprising a polyolefin and a membrane-forming solvent, removing the membrane-forming solvent, and stretching the resultant membrane again at least uniaxially at a speed of 3%/second or more at a temperature equal to or lower than the crystal dispersion temperature +20° C. | 01-08-2009 |
| 20090042008 | MICROPOROUS POLYOLEFIN MEMBRANE, ITS PRODUCTION METHOD, BATTERY SEPARATOR AND BATTERY - A microporous polyolefin membrane comprising a polyethylene resin, and having (a) a shutdown temperature of 135° C. or lower, at which the air permeability measured while heating at a temperature-elevating speed of 5° C./minute reaches 1×10 | 02-12-2009 |
| 20090079102 | METHOD FOR PRODUCING MICROPOROUS POLYOLEFIN MEMBRANE - A method for producing a microporous polyolefin membrane by extruding a melt blend comprising a polyethylene resin, polypropylene having a mass-average molecular weight of 1×10 | 03-26-2009 |
| 20090098341 | MICROPOROUS POLYOLEFIN MEMBRANE AND METHOD FOR PRODUCING THE SAME - The microporous polyolefin membrane obtained by stretching a gel molding comprising a polyolefin and a membrane-forming solvent at least uniaxially, heat-setting it, removing the membrane-forming solvent, and re-stretching it at least uniaxially has a large pore diameter and excellent air permeability, mechanical strength and compression resistance. | 04-16-2009 |
| 20090170005 | MICROPOROUS POLYOLEFIN MEMBRANE, BATTERY SEPARATOR FORMED THEREBY AND BATTERY - A microporous polyolefin membrane made of a polyethylene resin as a main component, and having (a) a shutdown temperature of 135° C. or lower, at which the air permeability measured while heating at a temperature-elevating speed of 5° C./minute reaches 1×10 | 07-02-2009 |
| 20100248002 | Microporous Multilayer Membrane, System And Process For Producing Such Membrane, And The Use Of Such Membrane - The invention relates to a multilayer microporous membrane comprising polyethylene and polypropylene and having an improved balance of properties including improved thickness variation in at least one planar direction. The invention also relates to a system and method for producing such a membrane, the use of such a membrane as a battery separator film, and batteries containing such a membrane. | 09-30-2010 |
| 20100316902 | Microporous Multilayer Membrane, System And Process For Producing Such Membrane, And The Use Of Such Membrane - The invention relates to a microporous membrane having an improved balance of important properties such as melt down temperature and thickness fluctuations. The invention also relates to a system and method for producing such a membrane, the use of such a membrane as a battery separator film, batteries containing such a membrane, and the use of such batteries as a power source in, e.g., electric and hybrid electric vehicles. | 12-16-2010 |
| 20110089602 | Extruder And Process For Preparing A Mixture Of Polymer And Diluent - The invention relates to a twin screw extruder for preparing a polymeric solution. The extruder includes an elongated housing having an inlet end, an outlet end, an extruder shaft length L and a pair of interconnecting bores disposed within the housing, a pair of elongated extruder shafts, each having an axis of rotation, the pair of elongated extruder shafts disposed within the pair of interconnecting bores and drivable in at least one direction of rotation, a plurality of extruder screw segments positioned along the pair of elongated extruder shafts in a fixed angular relationship therewith, the plurality of extruder screw segments selected to form multiple extruder stages. The invention also relates to a process for extruding a mixture of polymer and diluent. | 04-21-2011 |
| 20110127687 | Extruder And Process For Preparing A Mixture Of Polymer And Diluent - The invention generally relates to an extruder for preparing a mixture of polymer and diluent. The extruder includes multiple extruder stages, the multiple extruder stages comprising an inlet stage, a dispersion stage, and at least one mixing stage comprising a reverse mixing screw segment having a helical flight that traverses and forms an outer periphery thereof, the helical flight having a plurality of notches positioned therealong. A process for extruding the polymer-diluent mixture is also provided. | 06-02-2011 |
| 20110133355 | Extruder Having Dual Mixing Stages And Process For Preparing A Mixture Of Polymer And Diluent - An extruder for preparing a polymer-diluent mixture. The extruder includes an elongated housing having an inlet end, an outlet end and a bore disposed within the housing, an elongated extruder shaft having an axis of rotation, the elongated extruder shaft disposed within the bore and drivable in at least one direction of rotation, a plurality of extruder screw segments positioned along the elongated extruder shaft in a fixed angular relationship therewith, the plurality of extruder screw segments selected to form multiple extruder stages, the multiple extruder stages comprising an inlet stage, a dispersion stage, and at least one mixing stage, the plurality of extruder screw segments forming the at least one mixing stage comprising a reverse mixing screw segment having a helical flight that traverses and forms an outer periphery thereof, the helical flight having a plurality of notches positioned therealong, a material inlet adjacent the inlet end of the elongated barrel and a first fluid inlet located within the dispersion stage for introducing a diluent. A process for extruding a polymer-diluent mixture is also provided. | 06-09-2011 |
