Entries |
Document | Title | Date |
20080233483 | Layer having shielded fibers; and galvanic cell - A layer, in particular for use as a separator in galvanic cells, including fibers having at least one first substance which renders possible the chemical and/or physical binding of ammonia or ammonia compounds. A galvanic cell having a low self-discharging rate over its entire life cycle having a layer wherein a first substance is present in volumetric regions of the fibers whose surface areas are at least partially covered by a second substance. | 09-25-2008 |
20090011337 | SEPARATOR, BATTERY USING THE SAME, AND METHOD FOR MANUFACTURING SEPARATOR - A separator which includes a covering layer in which a fine framework of polyolefin resin is coated with a glass layer and an exposed layer in which the polyolefin resin is exposed is provided. A battery is provided having a cathode and an anode, an electrolyte, and a separator where the separator has the covering layer in which the fine framework of polyolefin resin is coated with the glass layer and a method for manufacturing a separator including the step of coating a fine framework of polyolefin resin with the glass layer by applying a precursor containing viscous liquid product which contains only polysilazane compound or a mixture of viscous liquid product which contains only polysilazane compound with polycarbosilazane compound to the polyolefin resin and placing the precursor applied polyoleline resin in a water bath to dry. | 01-08-2009 |
20090087749 | Microporous Polyolefin 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 from about 75 to about 99% of a polyethylene resin having a weight average molecular weight of from about 2.5×10 | 04-02-2009 |
20090148775 | FUEL CELL SEPARATOR RESIN COMPOSITION AND FUEL CELL SEPARATOR - The present invention provides a fuel cell separator resin composition comprising: (A) an epoxy resin; (B) a curing agent; (C) a curing accelerator comprising a salt of a diazabicyclo compound and an organic acid; and (D) a carbon material, wherein the content of the carbon material (D) is 35 to 85% by mass based on the total amount of the composition, wherein the carbon material (D) comprises high crystalline artificial graphite having a particle size of 150 to 500 μm in an amount of 5 to 100% by mass based on the total amount of the carbon material (D), and wherein the content of the curing accelerator (C) is 1 to 20 parts by weight per 100 parts by weight of the curing agent (B). | 06-11-2009 |
20090148776 | Liquid absorbing sheet and nonaqueous electrolyte battery pack - A liquid absorbing sheet has a liquid-absorbing resin layer that can effectively absorb the nonaqueous electrolyte solution used in nonaqueous electrolyte secondary cells that make nonaqueous electrolyte battery packs (in particular, lithium ion-based nonaqueous secondary battery packs). The liquid-absorbing resin layer is obtained by irradiating a particular monomer composition with UV rays or other energy rays to polymerize the monomer composition. The monomer composition contains a monofunctional monomer component (A) having a polyethylene glycol acrylate monomer and an amide bond-containing acrylic monomer; and a polyfunctional monomer component (B). | 06-11-2009 |
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 |
20090186279 | Polymeric Material And Its Manufacture And Use - Disclosed herein is a polymer composition, its manufacture and use, said composition may comprise greater than about 90 mole % propylene monomer, and having a unique combination of properties, including one or more of the following: a heat of fusion of more than about 108 J/g, a melting point of 165° C. or higher, a Melt Flow Rate so low that it is essentially not measurable and a molecular weight of greater than about 1.5×10 | 07-23-2009 |
20090186280 | POLYOLEFIN MICROPOROUS MEMBRANE - The present invention provides a microporous polyolefin film having a thickness of 1 μm (inclusive) to 50 μm (inclusive), a porosity of 30% (inclusive) to 70% (inclusive), a piercing strength of 0.15 N/μm or more in terms of a film thickness of 1 μm, tensile strengths in the length direction (MD tensile strength) and the width direction (TD tensile strength) of 30 MPa or more each, a thermal shrinkage in the width direction (TD thermal shrinkage) of 1% or less at 65° C., and a thermal shrinkage ratio in the length to width direction (MD/TD thermal shrinkage ratio) of more than 2 at 65° C. A process for producing the microporous film and a nonaqueous electrolyte secondary battery using the film are also provided. | 07-23-2009 |
20090258300 | Ethylene/Vinyl Alcohol-Derived Copolymer Fiber - The invention provides a fiber which is excellent in electrolyte absorption and retentivity and oxidation resistance and is suitable for use as a separator for alkaline secondary batteries. The invention is an ethylene/vinyl alcohol-derived copolymer fiber comprising an ethylene/vinyl alcohol-derived copolymer (A) having the following structural unit (1): | 10-15-2009 |
20090286161 | MICROPOROUS POLYOLEFIN MEMBRANE, ITS PRODUCTION METHOD, BATTERY SEPARATOR, AND BATTERY - A microporous polyolefin 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 (1) extruding a melt-blend of (a) (i) a polyethylene resin containing 7% or less by mass of ultra-high-molecular-weight polyethylene having a weight-average molecular weight of 1×10 | 11-19-2009 |
20100040953 | POROUS FILM AND SEPARATOR FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - Provided is a porous film formed from a polyolefin-based resin containing an ethylene-α-olefin copolymer including a structural unit derived from ethylene and a structural unit derived from one or more kinds of monomers selected from α-olefins having 4 to 10 carbon atoms, wherein a shutdown temperature is 125° C. or lower. | 02-18-2010 |
20100151333 | POLYAMIDE IMIDE FIBER, NON-WOVEN FABRIC COMPOSED OF THE FIBER, PROCESS FOR MANUFACTURE OF THE NON-WOVEN FABRIC, AND SEPARATOR FOR ELECTRONIC COMPONENT - The present invention provides a fiber having a nano-order fiber diameter, which is produced by without a process of dehydration and cyclization by a heat treatment after fiber spinning and has excellent heat resistance and mechanical strength, and a non-woven fabric composed of the fiber, and discloses the polyamide-imide fiber and the non-woven fabric having an average fiber diameter of from 0.001 μm to 1 μm and also discloses the process for producing threrof. The present invention also provides a separator for an electronic component which has a high conductivity and a small separator thickness and is improved in safety during reflow soldering or short-circuiting, and discloses the separator composed of a non-woven fabric obtained by an electro-spinning method. | 06-17-2010 |
20100151334 | Microporous Polyolefin Membrane, Its Production Method, And Battery Separator - A microporous polyolefin membrane comprising a polyethylene resin, and polypropylene having a weight-average molecular weight of 6×10 | 06-17-2010 |
20110003210 | Polyolefin Microporous Membrane Surface-Modified By Hydrophilic Polymer, Surface Modification Method Thereof And Lithium-Ion Polymer Battery Including The Same - Disclosed herein are a polyolefin microporous membrane of which surface is modified by a hydrophilic polymer, a surface modification method thereof and a lithium ion polymer battery including the surface-modified polyolefin microporous membrane as a separator. | 01-06-2011 |
20110151333 | LITHIUM ION BATTERY - In a lithium ion battery, one or more chelating agents may be attached to a microporous polymer separator for placement between a negative electrode and a positive electrode or to a polymer binder material used to construct the negative electrode, the positive electrode, or both. The chelating agents may comprise, for example, at least one of a crown ether, a podand, a lariat ether, a calixarene, a calixcrown, or mixtures thereof. The chelating agents can help improve the useful life of the lithium ion battery by complexing with unwanted metal cations that may become present in the battery's electrolyte solution while, at the same time, not significantly interfering with the movement of lithium ions between the negative and positive electrodes. | 06-23-2011 |
20110236764 | 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 membranes, batteries containing such membranes as battery separators, methods for making such batteries, and methods for using such batteries. | 09-29-2011 |
20110262814 | POLYOLEFIN MICROPOROUS FILM - There is provided a polyolefin microporous film which is excellent in taking-up stability in a production line and a processing line of the polyolefin microporous film, and further in a line for a battery taking-up step, and hardly generates step deviation when a roll thereof has received an impact. | 10-27-2011 |
20110318644 | AMPHOTERIC ION EXCHANGE MEMBRANES - An amphoteric ion exchange membrane for use in a vanadium redox flow battery has a vanadium ion permeability of less than 10×10 | 12-29-2011 |
20120164538 | MICROPOROUS MEMBRANE WINDING AND METHOD FOR MANUFACTURING THE SAME - A microporous membrane winding includes a microporous membrane wound around a core. The core has an outer diameter of 5 inches or greater, and has an outer surface with a surface roughness of 3.0 μm or less. A microporous membrane that is excellent in thickness uniformity and is favorably used as a separator for a lithium-ion secondary battery can be obtained from the microporous membrane winding. | 06-28-2012 |
20120308898 | AROMATIC POLYAMIDE POROUS FILM AND SEPARATOR FOR CAPACITOR OR BATTERY USING THE SAME - A porous film includes aromatic polyamide as a constituent component that has high heat resistance, high air permeability and high affinity to electrolytes. It is a porous aromatic polyamide film including aromatic polyamide and a hydrophilic polymer, wherein the hydrophilic polymer accounts for 12 to 50 parts by mass per 100 parts by mass of the aromatic polyamide, the thickness being 2 to 30 micrometers, the Gurley air permeability being 0.5 to 300 seconds/100 ml, and the thermal shrinkage rate being −0.5 to 1.0% at 200° C. | 12-06-2012 |
20130011743 | POROUS POLYPROPYLENE FILM - In order to provide a porous polypropylene film in which the ratio of change in air permeability is small and the initial air-permeating property is satisfactory even under high temperature environment, a porous polypropylene film is proposed, satisfying the following conditions (1) and (2) regarding air-permeability (Pa | 01-10-2013 |
20130011744 | METHOD FOR PRODUCING THERMOPLASTIC RESIN FILM - The present invention relates to a method for producing a film containing a thermoplastic resin, the method comprising: a step of feeding a material containing a thermoplastic resin and having a pair of opposed flat portions to between a pair of rollers with the thermoplastic resin in a molten state, and a step of rolling, with the pair of rollers, the pair of flat portions being stacked, thereby welding the flat portions to each other to form a united film, wherein the material to be fed to between the rollers is two separate films each having a flat portion or one flat cylindrical film having a pair of opposed flat portions linked together by connecting portions at their end portions. | 01-10-2013 |
20130017451 | POLYOLEFIN-BASED SPLIT-TYPE CONJUGATE FIBER, FIBER ASSEMBLY AND BATTERY SEPARATOR USING THE SAME AND METHOD FOR PRODUCING THE SAMEAANM Kida; TatsunoriAACI HyogoAACO JPAAGP Kida; Tatsunori Hyogo JP - A polyolefin-based split-type conjugate fiber according to the present invention is a polyolefin-based split-type conjugate fiber obtained by composite spinning including a first component containing a polypropylene-based resin and a second component containing a polyolefin-based resin, wherein the first component contains, as a primary component, a polypropylene resin having a Q value (the ratio between the weight average molecular weight Mw and the number average molecular weight Mn) of 6 or greater and a melt flow rate according to JIS K 7210 (MFR at a measurement temperature of 230° C. under a load of 2.16 kgf (21.18 N)) of 5 g/10 min or greater and less than 23 g/10 min, and the first component and the second component are adjacent to each other in a cross section of the polyolefin-based split-type conjugate fiber. Also, the polyolefin-based split-type conjugate fiber of the present invention can be obtained by melt spinning the first component and the second component by using a split type conjugate nozzle and drawing the resulting fiber. | 01-17-2013 |
20130022877 | Salt Modified Electrostatic Dissipative Polymers - The present invention relates to electrostatic dissipative thermoplatic urethanes (TPU) and compositions thereof. The present invention provides a composition comprising: (a) an inherently dissipative polymer and (b) a halogen-free lithium-containing salt. The invention also provides a shaped polymeric article comprising the inherently dissipative polymer compositions described herein. The invention also provides a process of making the inherently dissipative polymer compositions described herein. The process includes the step of mixing a halogen-free lithium-containing salt into an inherently dissipative polymer. | 01-24-2013 |
20130034777 | MICROPOROUS MEMBRANE, BATTERY SEPARATOR AND BATTERY - A method of manufacturing a microporous polymeric membrane including: heat-setting the microporous polymeric membrane in at least a first stage and a final stage, the first stage being upstream of the final stage and a temperature of the first stage being at least 15° C. cooler than a temperature of the final stage. | 02-07-2013 |
20130034778 | METHOD OF FORMING A FILM MADE OF A FLUOROPOLYMER OF THE POLYVINYLLDENE FLUORIDE TYPE THAT CAN BE USED AS A SEPARATOR FOR A LITHIUM BATTERY - A film made of a fluorinated polymer of the polyvinylidene fluoride type having suitable properties for use as a lithium storage battery separator is produced using a phase inversion technique in which a solution containing the fluorinated polymer is brought into the presence of an atmosphere laden with water vapor to precipitate the fluorinated polymer. The fluorinated polymer can be precipitated by placing the support on which the solution is deposited, in which the fluorinated polymer has been previously dissolved, in an enclosure containing an atmosphere laden with water vapor and thermostatically regulated to a temperature comprised between 30° C. and 70° C. The relative humidity content during precipitation of the fluorinated polymer is advantageously between about 60% and about 98%. | 02-07-2013 |
20130052539 | SEPARATOR FILM, ITS FABRICATION METHOD, SUPERCAPACITOR, BATTERY AND CAPACITOR PROVIDED WITH SAID FILM - The invention relates to a separator film for a device used for storing electrical energy, the film being porous and oriented, and being obtained by stretching in a longitudinal direction and in a direction transverse to the longitudinal direction, the film containing a mixture comprising a polypropylene homopolymer, at least 10% of a copolymer obtained from monomers comprising at least propylene and ethylene, and at least one beta-nucleating agent. According to the invention, the ethylene content of the copolymer is ≧1% but <10% and a propylene content of the copolymer is ≧90% for a film thickness of ≧8 microns and ≦30 microns, corresponding to a specified space factor according to the IEC-60674-3-1 standard greater than or equal to 145% and a density of the biaxially stretched film greater than or equal to 0.18 g/cm | 02-28-2013 |
20130130125 | CROSS-LINKED BATTERY ELECTRODE SEPARATOR - A cross-linked microporous polymeric battery electrode separator membrane is described. Such membranes, which would otherwise be soluble above a particular, generally high temperature in selected battery electrolyte systems, once at least in part cross-linked, swell in the electrolyte at the particular higher temperature instead of dissolving. When the membrane separators are restrained between solid electrodes in a battery, the separator cannot increase in bulk volume, and the swelling occurs within the pores with the pore volume decreasing from its original bulk volume. The drop in pore volume causes the battery current density to drop, thereby reducing the heat generation within the hot area of the battery. This process provides a measure of safety against overheating and fires, and the battery is capable of continued usage if the overheating is localized. | 05-23-2013 |
20130164629 | POLYMIDE BLEND NANOFIBER AND ITS USE IN BATTERY SEPARATOR - A polyimide blend nanofiber and its use in battery separator are disclosed. The polyimide blend nanofiber is made of two kinds of polyimide precursors by high pressure electrostatic spinning and then high temperature imidization processing, wherein one of the polyimide precursor does not melt under high temperature ,and the other is meltable at a temperature of 300-400° C. The polyimide blend nanofiber of present invention has high temperature-resistance, high chemical stability, high porosity, good mechanical strength and good permeability, and can be applied as battery separator. | 06-27-2013 |
20130209892 | PROPYLENE RESIN MICROPOROUS FILM, BATTERY SEPARATOR, BATTERY, AND METHOD FOR PRODUCING PROPYLENE RESIN MICROPOROUS FILM - Provided is a propylene resin microporous film which has excellent lithium ion permeability, and can be used to fabricate a high-performance lithium ion battery and prevent short circuits between positive and negative electrodes by dendrites. The propylene resin microporous film has micropores formed by uniaxially stretching a propylene resin film, a degree of air permeability of 100 to 400 s/100 mL, and a rate of surface aperture of 30 to 55%. | 08-15-2013 |
20130224602 | ELECTRODE-SEPARATOR INTEGRAL SEGMENT FOR A LITHIUM ION BATTERY - A method of making a separator for an electrochemical battery cell of a lithium ion battery includes electrospinning a non-woven polymer fiber mat onto a collection face of a collector substrate. The separator may be formed entirely of the electrospun non-woven polymer fiber mat or it may be a multi-layer composite that contains other components in addition to the electrospun non-woven polymer fiber mat. The collector substrate comprises an electrode (positive or negative) optionally covered with a ceramic particle layer such that electrospinning of the non-woven polymer fiber mat forms an electrode-separator integral segment. The electrode-separator integral segment may then be assembled into an electrochemical battery cell of a lithium ion battery. | 08-29-2013 |
20130244119 | GRAPHENE-CONTAINING SEPARATOR FOR LITHIUM ION BATTERIES - A separator for a lithium ion battery, characterized in that same comprises graphene. | 09-19-2013 |
20130280615 | POROUS MEMBRANE AND PROCESS FOR PREPARING THE SAME - The present invention relates to a porous membrane containing cellulose fibers, wherein the cellulose fibers contain 5% by weight or more of cellulose fibers with a diameter of 1 μm or more, relative to the total weight of the cellulose, and the porous membrane has a tensile strength of 50 N·m/g or more, and/or has a tear strength of 0.40 kN/m or more. The porous membrane according to the present invention can provide a separator for electrochemical devices with superior properties, at a reasonable cost. | 10-24-2013 |
20130280616 | POROUS MEMBRANE AND PROCESS FOR PREPARING THE SAME - The present invention relates to a porous membrane containing cellulose fibers, wherein the cellulose fibers contain 5% by weight or more of cellulose fibers with a diameter of 1 μm or more, relative to the total weight of the cellulose fibers, the mode diameter (maximal frequency) of the pore distribution determined by the mercury penetration method is less than 0.3 μm, the air resistance per thickness of 10 μm is from 20 to 600 seconds, and the porous membrane has a volume resistivity of 1500 Ω·cm or less determined by alternate current with a frequency of 20 kHz in which the porous membrane is impregnated with 1 mol/LiPF | 10-24-2013 |
20130288132 | POLYOLEFIN RESIN POROUS FILM, AND NON-AQUEOUS ELECTROLYTE CELL SEPARATOR USING SAME - This polyolefin resin porous film can be easily produced, and when used as a non-aqueous electrolyte cell separator, can suppress clogging and can evince a high cell output. The polyolefin resin porous film is a porous film having a polyolefin resin as the primary component and is characterized by the average flow diameter pressure (P | 10-31-2013 |
20130302694 | POROUS PARTICLES COMPRISING AMINOPLASTIC - The invention relates to particulate aminoplastic material composed of at least one aminoplastic, where the specific surface area of the particles is from 1 to 500 m | 11-14-2013 |
20130302695 | THIN MACROPOROUS POLYMERIC FOILS - The invention relates to a foil which includes polymeric fibres, the polymeric fibres of which are interwelded, more particularly heat welded, solvent welded, cold welded, ultrasonically welded and/or at least partly interfused or positively or nonpositively interconnected at the crossing points between the pores at least, a process for production thereof, and also use thereof. | 11-14-2013 |
20130316246 | POROUS FILM, SEPARATOR FOR ELECTRIC STORAGE DEVICE, AND ELECTRIC STORAGE DEVICE - A porous film that excels when used as a separator for a lithium-ion battery not only in separator followability to expansion and contraction of an electrode during charging and discharging, but also in charging and discharging cycle characteristics. The porous film, when the thickness of a circular region having a diameter of 10 mm as an initial thickness t | 11-28-2013 |
20140072878 | SEPARATOR FOR ELECTROCHEMICAL DEVICE AND PROCESS FOR PREPARING THE SAME - The present invention relates to a process for preparing a separator for an electrochemical device, including the steps of: applying a slurry including at least cellulose fibers and a hydrophilic pore former with a boiling point of 180° C. or more onto a substrate; drying the slurry to form a sheet on the substrate; and separating the sheet from the substrate to obtain a separator, wherein the separator has a volume resistivity of 1500 Ω·cm or less determined by alternate current with a frequency of 20 kHz in which the separator is impregnated with a 1 mol/LiPF | 03-13-2014 |
20140134497 | SOY PROTEIN AND CARBOHYDRATE CONTAINING BINDER COMPOSITIONS - Soy protein and carbohydrate containing binder compositions are described. The binder compositions may include a carbohydrate, a nitrogen-containing compound, and a soy protein. The binder compositions may also optionally include thickening agents such as modified celluloses and polysaccharides. | 05-15-2014 |
20140212766 | BLOCK COPOLYMER BATTERY SEPARATOR - The invention herein described is the use of a block copolymer/homopolymer blend for creating nanoporous materials for transport applications. Specifically, this is demonstrated by using the block copolymer poly(styrene-block-ethylene-block-styrene) (SES) and blending it with homopolymer polystyrene (PS). After blending the polymers, a film is cast, and the film is submerged in tetrahydrofuran, which removes the PS. This creates a nanoporous polymer film, whereby the holes are lined with PS. Control of morphology of the system is achieved by manipulating the amount of PS added and the relative size of the PS added. The porous nature of these films was demonstrated by measuring the ionic conductivity in a traditional battery electrolyte, 1M LiPF | 07-31-2014 |
20140287321 | METHOD TO PRODUCE NANOPOROUS POLYMERIC MEMBRANES - A method for making a flat polymer foam having a core layer of nano-sized open, interconnected cells that includes saturating a solid-state polymer with a supercritical fluid, allowing the gas to desorb for at least 35 minutes, and then heating the gas-saturated solid polymer for at least 3 minutes while constraining the foam in the thickness dimension. Any skin layer formed on the exterior may be removed via polishing, thus creating a foam with an open structure from side to side. The foam can be used as a battery separator. | 09-25-2014 |
20140349193 | METHOD FOR PREPARING MICROPOROUS POLYOLEFIN FILM WITH IMPROVED PRODUCTIVITY AND EASY CONTROL OF PHYSICAL PROPERTIES - Provided is a method of manufacturing a microporous polyolefin film useable as a battery separator, which is easy to control strength, permeability and shrinking properties of the microporous film and embodies excellent quality uniformity and production stability in fabricating the microporous film. | 11-27-2014 |
20150072242 | GAS CHANNELING POLYOLEFIN SEPARATOR INLAY - Provided is a polyolefin separator/inlay interposed between the positive and negative electrodes of a battery, with the separator/inlay having channels that exist in at least two planes. In one embodiment, the separator inlay is comprised of a polyolefin. | 03-12-2015 |
20150072243 | GAS CHANNELING POLYMERIC SEPARATOR INLAY - Provided is a polymeric separator/inlay interposed between the positive and negative electrodes of a battery, with the separator/inlay having channels that exist in at least two planes. In one embodiment, the separator inlay is comprised of a polyester, polyamide, polyvinyl chloride or fluorocarbon polymer. | 03-12-2015 |
20150299380 | SOLUBLE POLYMERS - Polymers exhibiting solubility, conjugation and microporosity are processable and useful for a variety of applications. The polymers comprise repeating units which are linked together to form rigid macromolecular structures which do not exhibit space-efficient packing. The polymers may comprise aromatic structures, e.g. fused aromatic structures and/or multiply bonded aromatic structures, and may comprise solubilising groups such as for example branched alkyl groups or siliyl groups. | 10-22-2015 |
20150372269 | NON-WOVEN FABRIC BASE MATERIAL FOR LITHIUM ION SECONDARY BATTERY SEPARATOR AND LITHIUM ION SECONDARY BATTERY SEPARATOR - A non-woven fabric base material for a lithium ion secondary battery separator composed mainly of a polyethylene terephthalate fiber, characterized in that the non-woven fabric base material comprises a polyethylene terephthalate binder fiber and a crystallized polyethylene terephthalate fiber, and the content of a polyethylene terephthalate binder fiber having a fiber length of 2.5 mm or less is 10 to 60 mass %. | 12-24-2015 |
20160043372 | MEMBRANE MADE OF A BLEND OF UHMW POLYOLEFINS - A membrane is a microporous sheet made of a blend of a first ultra high molecular weight polyolefin and a second ultra high molecular weight polyolefin. Each polyolefin has a molecular weight, both of those molecular weights are greater than 1 million, and one molecular weight is greater than the other. Additionally, the intrinsic viscosity (IV) of the membrane may be greater than or equal to 6.3. | 02-11-2016 |
20160133902 | PROCESS FOR PRODUCING CELLULOSE-NANOFIBER-FILLED MICROPOROUS STRETCHED POLYOLEFIN FILM, MICROPOROUS CELLULOSE-NANOFIBER COMPOSITE FILM, AND SEPARATOR FOR NON-AQUEOUS SECONDARY BATTERY - A method for producing a cellulose nanofiber-containing polyolefin microporous stretched film according to the invention includes: a first step of obtaining a cellulose powder dispersion mixture by uniformly dispersing a cellulose which has a powder particle shape and whose hydroxyl groups have been subjected to a lipophilizing treatment using a dibasic acid anhydride, in a plasticizer; a second step of melt-kneading the cellulose powder dispersion mixture and a polyolefin to obtain a polyolefin resin composition; a third step of extrusion-molding the polyolefin resin composition to obtain an extrudate; a fourth step of stretching the extrudate with a film stretcher to obtain a film; a fifth step of extracting out the plasticizer from the film; and a sixth step of thermally fixing the film from which the plasticizer has been extracted out for inhibiting contraction, while stretching the film at a temperature not higher than a melting point of the polyolefin, in which a twin-screw kneading extruder is used only once throughout the second and third steps. | 05-12-2016 |
20180022004 | MICROPOROUS MEMBRANE AND PRODUCTION METHOD THEREFOR | 01-25-2018 |