Class / Patent application number | Description | Number of patent applications / Date published |
429254000 | Rubber or thermoplastic resin | 35 |
20090029262 | Separator and electrical/electronic components using the same - The invention provides a separator characterized by a constitution wherein a porous sheet formed of a thermoplastic polymer having a melting point of 200° C. or lower is incorporating a thin sheet material comprising an organic compound substantially having no stable melting point, which is useful for secondary batteries or capacitors having both the shutting-down function and the high temperature shape stability. | 01-29-2009 |
20090087750 | Microporous Membrane And Manufacturing Method - A microporous membrane having a structure in which its pore size distribution curve obtained by mercury intrusion porosimetry has at least two peaks, which is produced by extruding a combination of a diluent or solvent and a polyolefin resin composition comprising (a) from about 74 to about 99% of a first polyethylene resin having a weight average molecular weight of from about 2.5×10 | 04-02-2009 |
20090269672 | PRODUCTION METHOD OF MICROPOROUS POLYETHYLENE MEMBRANE AND BATTERY SEPARATOR - A microporous polyethylene membrane having well-balanced permeability, mechanical properties, heat shrinkage resistance, compression resistance, electrolytic solution absorbability, shutdown properties and meltdown properties, with an average pore diameter changing in a thickness direction is produced by melt-blending a polyethylene resin and a membrane-forming solvent to prepare a solution A having a resin concentration of 25 to 50% by mass and a solution B having a resin concentration of 10 to 30% by mass, the resin concentration in the solution A being higher than that in the solution B, (a) simultaneously extruding the resin solutions A and B through a die, cooling the resultant extrudate to provide a gel-like sheet in which the resin solutions A and B are laminated, and removing the membrane-forming solvent from the gel-like sheet, or (b) extruding the resin solutions A and B through separate dies, removing the membrane-forming solvent from the resultant gel-like sheets A and B to form microporous polyethylene membranes A and B, and alternately laminating the microporous polyethylene membranes A and B, while easily controlling the average pore diameter distribution in the microporous polyethylene membrane in a thickness direction. | 10-29-2009 |
20100009265 | POLYOLEFIN MICROPOROUS MEMBRANE AND SEPARATOR FOR NONAQUEOUS ELECTROLYTE BATTERY - The present invention provides a polyolefin microporous membrane made of a polyolefin resin and an inorganic particle, and the puncture strength of the microporous membrane is 3 N/20 μm or more and the membrane thickness retention ratio in penetration creep is 16% or more, thereby being excellent in safety and long-term reliability, and a separator for a nonaqueous electrolyte battery, and the like can be provided. | 01-14-2010 |
20100062342 | POLYMER MEMBRANE UTILIZED AS A SEPARATOR IN RECHARGEABLE ZINC CELLS - A separator for zinc electrode-based cells that is effective in preventing dendrite growth in a zinc rechargeable cell is prepared as A standalone membrane, or as a composite membrane by impregnating the membrane into a nonwoven fabric. Interpenetrating polymer networks are employed by combining two different polymers. The two polymers penetrate each other on a molecular scale so that mechanical strength, water content and conductivity of the membranes can be effectively optimized. Since the water content of membrane can be optimized by introducing high water content polymers other than polyvinyl alcohol, wherein the diffusion of water from the separator membrane when the membrane contacts alkaline electrolyte solution can be largely reduced. Such membranes demonstrate excellent dendrite blocking capability in a practical zinc rechargeable cell. | 03-11-2010 |
20100216028 | LAMINATED POROUS FILM - Provided is a laminated porous film comprising a laminate of a heat-resistant porous layer containing a liquid crystalline polyester and a shutdown layer containing a thermoplastic resin. | 08-26-2010 |
20100227223 | METHOD FOR PRODUCTION OF POROUS FILM, POROUS FILM, SEPARATOR FOR NON-AQUEOUS ELECTROLYTE BATTERY, AND NON-AQUEOUS ELECTROLYTE BATTERY USING THE SEPARATOR - The method for producing a porous film of the present invention includes producing a stretched film by stretching a resin sheet containing at least polyolefin, and then irradiating the stretched film with a vacuum ultraviolet ray. The separator for a non-aqueous electrolyte battery of the present invention is composed of the porous film obtained by the production method of the present invention. The non-aqueous electrolyte battery of the present invention is provided with the separator for a non-aqueous electrolyte battery of the present invention. | 09-09-2010 |
20100316912 | SEPARATOR FOR POWER STORAGE DEVICE - This invention is relates to a separator of a power storage device which is a laminate of a polyolefin porous membrane layer and a fiber layer comprising a solvent spun cellulose; and a separator of a power storage device, wherein the separator is a laminate of a polyolefin porous membrane layer and a fiber layer comprising a solvent spun cellulose, and the volume of a cavity part of the fiber layer is smaller than the volume of a resin part of the polyolefin porous membrane layer. | 12-16-2010 |
20110027660 | POLYOLEFIN MICROPOROUS FILM AND ROLL - An object of the present invention is to provide a polyolefin microporous film that can sufficiently reduce the occurrence of raised edges at a slitting step such as a slitting step at the time of producing the polyolefin microporous film and a slitting step at the time of processing the polyolefin microporous film into a roll. The present invention provides a polyolefin microporous film formed from a polyolefin composition comprising a polyethylene, a first polypropylene having a viscosity average molecular weight of not less than 50,000 and less than 300,000, and a second polypropylene having a viscosity average molecular weight of not less than 300,000. | 02-03-2011 |
20110117439 | MICROPOROUS MEMBRANES AND METHODS FOR PRODUCING AND USING SUCH MEMBRANES - The invention relates to microporous polymeric membranes suitable for use as battery separator film. The invention also relates to a method for producing such a membrane, batteries containing such membranes as battery separators, methods for making such batteries, and methods for using such batteries. | 05-19-2011 |
20110165470 | BICOMPONENT FIBER - The present invention relates to a new bicomponent fiber, a nonwoven fabric comprising said new bicomponent fiber and sanitary articles made therefrom. The bicomponent fiber contains a polyethylene-based resin forming at least part of the surface of the fiber longitudinally continuously and is characterized by a Co-monomer Distribution Constant greater than about 45, a recrystallization temperature between 85° C. and 110° C., a tan delta value at 0.1 rad/sec from about 15 to 50, and a complex viscosity at 0.1 rad/second of 1400 Pa.sec or less. The nonwoven fabric comprising the new bicomponent fiber according to the instant invention are not only excellent in softness, but also high in strength, and can be produced in commercial volumes at lower costs due to higher thoughputs and requiring less energy. | 07-07-2011 |
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 |
20120183862 | BATTERY SEPARATOR - A battery separator comprising at least one nonwoven web layer is provided. The nonwoven web layer comprises a plurality of first fibers, a plurality of second fibers, and a binder. The first fibers comprise a water non-dispersible synthetic polymer and have a different configuration and/or composition than the second fibers. The first fibers have a length of less than 25 millimeters and a minimum transverse dimension of less than 5 microns. The nonwoven web layer comprises at least 10 weight percent of the first fibers, at least 10 weight percent of the second fibers, and at least 1 weight percent of the binder. The battery separator exhibits an enhanced combination of strength, durability, and ionic resistance. | 07-19-2012 |
20130004857 | SHAPE MEMORY POLYMER CONTAINING COMPOSITE MATERIALS - A product, and a method for forming a product, that includes a composite material having a polymeric carrier resin and a shape memory polymer material capable of transformation between a temporary shape and a permanent shape in the presence of an external stimuli, wherein said transformation from said temporary shape to said permanent shape changes at least one property of said composite material. | 01-03-2013 |
20130017452 | POLYPROPYLENE SERIES RESIN POROUS FILM, BATTERY SEPARATOR AND BATTERYAANM Yamamoto; MihoAACI ShigaAACO JPAAGP Yamamoto; Miho Shiga JPAANM Yamada; TakeyoshiAACI ShigaAACO JPAAGP Yamada; Takeyoshi Shiga JPAANM Usami; YasushiAACI ShigaAACO JPAAGP Usami; Yasushi Shiga JP - As a porous film in which the air-permeability at the time of elongation of the porous film was adjusted, whereby, when used as a battery separator, the holes of a separator in an electrode/separator wound body have been controlled, a polypropylene series resin porous film is proposed, in which, for a porous film having a polypropylene series resin as the main component, regarding air-permeability (Pa) prior to elongation and air-permeability (Pa′) at 5% elongation, (1) Pa′ is 1,000 seconds/100 ml or less and (2) Pa′/Pa is 1.5 or less. | 01-17-2013 |
20130078527 | POROUS NANOWEB AND METHOD FOR MANUFACTURING THE SAME - Disclosed is a porous nanoweb including first and second nanofilaments, which facilitates to perform heat resistance simultaneously with a shutdown function for preventing a battery explosion caused by an abnormal heat generation, and to realize small thickness and easy control of porosity, wherein, if the porous nanoweb is used as a battery separator for a secondary battery, it allow the good battery efficiency and good safety owing to the low resistance, the porous nanoweb comprising the first nanofilament having a melting temperature not more than 200° C.; and the second nanofilament having a melting temperature not less than 210° C. | 03-28-2013 |
20130273434 | METHODS OF PRODUCING THE MEMBRANES AND THE USES OF MEMBRANES AS BATTERY SEPARATOR FILMS - A process of producing a membrane includes extruding diluent and polymer to form an extrudate, the polymer includes a first polyethylene having an Mw<1.0×10 | 10-17-2013 |
20130316247 | POROUS POLYPROPYLENE FILM, SEPARATOR FOR ELECTRICITY STORAGE DEVICE, AND ELECTRICITY STORAGE DEVICE - A porous polypropylene film includes a polypropylene resin and a β-crystal nucleating agent, in which a temperature at which a heat shrinkage rate of a dimension in the width direction of the film is 5% is 130 to 200° C., air permeation resistance is 50 to 500 sec/100 ml, porosity is 35 to 70%, and when porosity is ε and air permeation resistance is G, both satisfy expression (1): | 11-28-2013 |
20130344395 | Polyolefin Microporous Membrane and Separator For Lithium Ion Secondary Battery - A polyolefin microporous membrane that can realize a lithium ion secondary battery having favorable resistance against foreign matters or the like, and high cycle characteristics at a high temperature is provided. The present invention provides a polyolefin microporous membrane having a ratio of tensile strength in a length direction to that in a width direction of 0.75 to 1.25, and a thermal shrinkage rate in the width direction at 120° C. of less than 10%. | 12-26-2013 |
20140120426 | SECONDARY BATTERIES - The present invention pertains to a secondary battery comprising at least one separator, said separator comprising at least one fluorinated polymer [polymer (F)], said polymer (F) comprising recurring units derived from vinylidene fluoride (VDF), hexafluoropropylene (HFP) and at least one (meth)acrylic monomer (MA) having formula (I) here below, wherein: —R | 05-01-2014 |
20140134498 | SEPARATOR MEDIA FOR ELECTROCHEMICAL CELLS - A separator medium for electrochemical cells that contains at least one nonwoven sheet of polymeric fibers. The nonwoven sheet has a surface area of about 0.5 to about 1.5 m | 05-15-2014 |
20140287322 | BIAXIALLY ORIENTED MICROPOROUS MEMBRANE - A microporous membrane is made by a dry-stretch process and has substantially round shaped pores and a ratio of machine direction tensile strength to transverse direction tensile strength in the range of 0.5 to 5.0. The method of making the foregoing microporous membrane includes the steps of: extruding a polymer into a nonporous precursor, and biaxially stretching the nonporous precursor, the biaxial stretching including a machine direction stretching and a transverse direction stretching, the transverse direction stretching including a simultaneous controlled machine direction relax. | 09-25-2014 |
20140329154 | COATING LIQUID, LAMINATED POROUS FILM, AND METHOD FOR PRODUCING LAMINATED POROUS FILM - The present invention provides a coating liquid, a laminated porous film and a method for producing a laminated porous film. The coating liquid comprises a binder resin, a filler and a medium, wherein the filler is a mixture comprising (a) a filler having a specific surface area of not less than 7 m | 11-06-2014 |
20140329155 | AROMATIC POLYAMIDE POROUS FILM, SEPARATOR FOR BATTERY, AND BATTERY - An aromatic polyamide porous film has a total number of branch points of pores in an area of 3 cubic micrometers obtained by three-dimensional structural analysis is 2,000 to 20,000, which ensures high rate characteristics and is also capable of suppressing deterioration of cycle characteristics and storage characteristics as well as abnormal heat generation, when used as a separator for battery, and also has excellent heat resistance; and a separator for battery and a battery, each including the aromatic polyamide porous film. | 11-06-2014 |
20140335423 | PROPYLENE-BASED RESIN MICROPOROUS FILM, SEPARATOR FOR BATTERY, BATTERY, AND METHOD FOR PRODUCING PROPYLENE-BASED RESIN MICROPOROUS FILM - The present invention provides a propylene-based resin microporous film which has excellent electrolyte solution retention property, and can provide a lithium ion battery in which a decrease in discharge capacity is highly reduced even after repeated charge and discharge. | 11-13-2014 |
20140342238 | METHOD OF MANUFACTURING POROUS SEPARATOR COMPRISING ELASTIC MATERIAL, POROUS SEPARATOR MANUFACTURED BY THE METHOD, AND SECONDARY BATTERY COMPRISING THE SEPARATOR - Disclosed is a method of manufacturing a porous separator including an elastic material, and a separator manufactured by the method. The separator includes an elastic material being uniformly dispersed in a polymer at a weight ratio of 40:60 to 5:95, and a value of elongation at break in a low tensile strength direction at room temperature is greater than or equal to 250%. In addition, the method of manufacturing a porous separator includes forming an extruded sheet by extruding a mixture of a polymer and an elastic material at a weight ratio of 95:5 to 60:40, forming a film by annealing and stretching the extruded sheet, and forming a porous separator by heat setting the stretched film. Accordingly, a thermal shrinkage ratio of the film is reduced and an elongation at break is greatly increased, to provide a porous separator with improved stability. | 11-20-2014 |
20140349194 | SEPARATOR AND METHOD FOR MANUFACTURING THE SEPARATOR - A separator arranged between a pair of electrode sheets includes a nonwoven fabric formed of thermoplastic resin fibers spun by a melt-blowing process. The fibers include fine fibers having fiber diameters of 0.1 μm or more and 1 μm or less, and thick fibers having fiber diameters of 8 μm or more and 30 μm or less. The fine fibers and the thick fibers are mixed over the entire thickness of the nonwoven fabric. | 11-27-2014 |
20140349195 | METHOD FOR PRODUCING PROPYLENE-BASED RESIN MICROPOROUS FILM AND PROPYLENE-BASED RESIN MICROPOROUS FILM - Provided is a method for producing a propylene-based resin microporous film capable of forming a high-performance lithium ion battery. The method for producing a propylene-based resin microporous film includes an extrusion step of melt-kneading a propylene-based resin in an extruder, and extruding the resin to obtain a propylene-based resin film; a first stretching step of uniaxially stretching the propylene-based resin film at a surface temperature of −20 to 100° C.; second stretching step of repeating, a plurality of times, a stretching basic step in which the propylene-based resin film after the first stretching step is uniaxially stretched at a surface temperature that is equal to or lower than a temperature lower than the melting point of the propylene-based resin by 10 to 100° C., wherein between successive stretching basic steps, the stretching ratio in the forward-side stretching basic step is adjusted so as to be lower than that of the backward-side stretching basic step; and an annealing step of annealing the propylene-based resin film after the second stretching step. | 11-27-2014 |
20150024278 | METHOD FOR MANUFACTURING A POROUS NANOWEB - Disclosed is a porous nanoweb including first and second nanofilaments, which facilitates to perform heat resistance simultaneously with a shutdown function for preventing a battery explosion caused by an abnormal heat generation, and to realize small thickness and easy control of porosity, wherein, if the porous nanoweb is used as a battery separator for a secondary battery, it allow the good battery efficiency and good safety owing to the low resistance, the porous nanoweb comprising the first nanofilament having a melting temperature not more than 200° C.; and the second nanofilament having a melting temperature not less than 210° C. | 01-22-2015 |
20150140439 | COATING FLUID, LAMINATED POROUS FILM, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A coating liquid according to the present invention comprises polyvinyl alcohol (PVA), boric acid and/or an organometallic compound having the ability of cross-linking PVA, an inorganic filler, a water-soluble compound having a carboxyl group and/or a sulfonic group, and water. According to the present invention, a coating liquid can be obtained which is useful in the preparation of a laminated porous film having suppressed powder fall-off and excellent heat shape stability. | 05-21-2015 |
20150318527 | PLASMA TREATMENT OF AN ELECTROCHEMICAL MEMBRANE - A method for treating an electrochemical membrane includes providing a porous film having a first outer surface and a second opposed outer surface, and treating at least a portion of the first outer surface with an air plasma jet at atmospheric pressure to functionalize the at least a portion of the first outer surface with a plurality of oxygen functional groups. A battery separator has an ionically conductive separator film having a first functionalized outer surface with a plurality of oxygen atoms providing one to twenty percent of the total atoms present on the surface to provide a greater electrolytic uptake than a non-functionalized film. An electrochemical membrane has an ionically conductive microporous film with at least a portion of the first side having a plurality of polar functional groups introduced by air plasma treatment at atmospheric pressure. | 11-05-2015 |
20160040335 | MELT-BLOWN NONWOVEN FABRIC, AND PRODUCTION PROCESS AND APPARATUS FOR THE SAME - It is an object of the present invention to provide a stable production process for a melt-blown nonwoven fabric comprising thin fibers and having extremely few thick fibers [number of fusion-bonded fibers] formed by fusion bonding of thermoplastic resin fibers to one another, and an apparatus for the same. The present invention relates to a melt-blown nonwoven fabric comprising polyolefin fibers and having (i) a mean fiber diameter of not more than 2.0 μm, (ii) a fiber diameter distribution CV value of not more than 60%, and (iii) 15 or less fusion-bonded fibers based on 100 fibers; a production process for a melt-blown nonwoven fabric characterized by feeding cooling air of not higher than 30° C. from both side surfaces of outlets of slits 31 from which high-temperature high-velocity air is gushed out and thereby cooling the spun molten resin; and a production apparatus for the same. | 02-11-2016 |
20160056434 | MICROPOROUS SEPARATION MEMBRANE COMPRISING POLYPROPYLENE RESIN - Provided is a microporous separation membrane using a polypropylene resin, and more specifically, a microporous polymer separation membrane produced using a polypropylene resin, of which, at 230° C. under 2.16 kg, the melt index is 0.5 to 10 g/10 min., the polydispersity index is 5 or more, and the stereoregularity (isotactic index) is 94% or more. | 02-25-2016 |
20160111697 | SINGLE FIBER LAYER STRUCTURE OF MICRON FIBERS APPLIED IN SEPARATOR FOR BATTERY - A single fiber layer structure of micron or nano fibers, and a multi-layer structure of micron and nano fibers are provided. The single fiber layer structure of micron fibers comprises a web of micron fibers and an impregnating resin, and has a pore size of 1 nm-500 nm. The web of micron fibers is formed by plural interweaved micron fibers (D≧1 μm). The single fiber layer structure of nano fibers comprises a web of nano fibers formed by plural interweaved nano fibers (D<1 μm). The multi-layer structure of micron and nano fibers comprises a web of interweaved micron fibers, a web of nano fibers formed by plural nano fibers interweaved on the web of micron fibers, a mixture layer formed by parts of the interweaved nano and micron fibers, and a resin at least impregnating the mixture layer and parts of the micron fibers of the web of micron fibers. | 04-21-2016 |
20160133903 | SEPARATOR FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY INCLUDING SAME - A separator for a rechargeable lithium battery and a rechargeable lithium battery including the same, the separator including a substrate; and a coating layer on at least one side of the substrate, wherein the coating layer includes a polyvinylidene fluoride-containing compound, and an acryl-containing compound represented by the following Chemical Formula 1: | 05-12-2016 |