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The present invention provides a polyolefin multilayer microporous membrane that has a low air permeability value, maintains high porosity and mechanical strength even when formed into a thin film, has excellent impedance characteristics, and has excellent battery characteristics when used as a battery separator. (Solution) A polyolefin multilayer microporous membrane including a first microporous layer and a second microporous layer; the first microporous layer including a first polyolefin resin containing a polypropylene; the second microporous layer including a second polyolefin resin containing an ultrahigh molecular weight polyethylene; and the polyolefin multilayer microporous membrane satisfying the following requirements (I) and (II).(I) A membrane thickness is not greater than 25 m, and the membrane thickness (m) and a porosity (%) satisfy the relationship in the formula below. (II) An air permeability in terms of a membrane thickness of 16 m is not less than 100 sec/100 cm^(3) and not greater than 300 sec/100 cm^(3).


A polyolefin multilayer microporous membrane is disclosed. The polyolefin multilayer microporous membrane has a low air permeability value, maintains high porosity and mechanical strength even when formed into a thin film. The polyolefin multilayer microporous membrane also has excellent impedance characteristics. The polyolefin multilayer microporous membrane has excellent battery characteristics when used as a battery separator.


A polyolefin multilayer microporous membrane is disclosed. The polyolefin multilayer microporous membrane has at least three layers, the membrane comprising a first microporous layer composed of a polyethylene resin containing an ultrahigh molecular weight polyethylene (surface layers) and a second microporous layer composed of a polyolefin rein containing a high-density polyethylene and polypropylene (intermediate layer), wherein (I) the pin puncture strength is at least 25 g/m, (II) the coefficient of static friction with respect to a metal foil is at least 0.40, and (III) the meltdown temperature is at least 180 C.


Patent
The Film Co | Date: 2016-08-17

A digital movie projection system and method is disclosed, wherein the digital movie projection system comprises a projector system and an image acquisition and analysis system; the projector system is provided therein with a video input module (such as an IMB integrated media module), an image optimization processing module, and a video output module (such as an ICP integrated control module); and the image optimization processing module is electrically connected to the video input and output modules and the image acquisition and analysis system provided outside the projector system, respectively. The image optimization processing module and the video input and output modules are integrated in the projector system, and the image optimization processing module is electrically connected to the video input and output modules respectively and built in the projector system, ensuring the security and stability of image information throughout the movie projection process.


Disclosed is an organic/inorganic composite porous film comprising: (a) inorganic particles; and (b) a binder polymer coating layer formed partially or totally on surfaces of the inorganic particles, wherein the inorganic particles are interconnected among themselves and are fixed by the binder polymer, and interstitial volumes among the inorganic particles form a micropore structure. A method for manufacturing the same film and an electrochemical device including the same film are also disclosed. An electrochemical device comprising the organic/inorganic composite porous film shows improved safety and quality.


The present invention relates to a polyolefin microporous membrane having an air permeability normalized to a thickness of 16 m of from 100 to 220 sec/100 cc, a pin puncture strength normalized to a thickness of 16 m of not less than 550 gf, and a crystallization half time t_(1/2) of from 10 to 35 minutes when subjected to isothermal crystallization at 117C; a separator for a battery using the same; and a production method thereof. The polyolefin microporous membrane of the present invention has excellent pin puncture strength and air permeability, suppresses curling, and has an excellent appearance without wrinkles or winding deviation when formed into a roll.


Patent
The Film Co | Date: 2016-11-16

The present invention provides a laminated porous membrane which has a very high peel strength between a polyolefin porous membrane and a modified porous layer and is suitable for high-speed processing, and a battery separator having excellent adhesion with electrodes. (Solution) A battery separator having at least a polyolefin porous membrane having protrusions made of a polyolefin interspersed randomly on one surface at a density of not less than 3 protrusions/cm^(2) and not greater than 200 protrusions/cm^(2), the protrusions satisfying 5 m W 50 m (W being a size of the protrusion) and 0.5 m H (H being a height of the protrusion); and a modified porous layer containing a fluorine-based resin and inorganic particles laminated on a surface of the polyolefin porous membrane having the protrusions; a content of the inorganic particles relative to a total of the fluorine-based resin and the inorganic particles of the modified porous layer being not less than 40 wt.% and less than 80 wt.%.


Considering that battery separators will require further thinner materials and lower costs in the future, a battery separator of the present invention, in which multi-layer polyolefin porous membrane with exceptionally high peel strength against a modified porous layer, suitable for high-speed processing during slit process and battery assembly process, and suitable for laminating on a multi-layer modified porous layer, and a multi-layer modified porous layer are laminated, is provided. A multi-layer polyolefin porous membrane comprising at least two or more layers, the multi-layer polyolefin porous membrane having a shut-down temperature in a range of 128 to 135C, a rate of increase in air permeation resistance from 30C to 105C scaled to 20 m thickness less than 1.5 sec/100 cc Air/C, and a thickness not more than 20 m.


Considering that the battery separator of the present invention will require thinner materials and lower costs in the future, provided are a polyolefin porous membrane with exceptionally high peel strength between the polyolefin porous membrane and a modified porous layer, suitable for high-speed processing during slit processing and the battery assembly process, and suitable for laminating on a modified porous layer, and a battery separator obtained by laminating a modified porous layer on the polyolefin porous membrane. A polyolefin porous membrane comprising protrusions of polyolefin having a size (W) within a range of 5 m W 50 m and a height (H) within a range of 0.5 m H and irregularly disposed on both sides of the polyolefin porous membrane in a density not less than 3/cm^(2) and not more than 200/cm^(2) per side, and the polyolefin porous membrane having a thickness of not more than 25 m.


Patent
The Film Co, Toyocolor Co. and Toyo Ink Science Holdings Co. | Date: 2016-02-03

A heat-ray-blocking fluororesin film comprising a heat-ray-blocking metal oxide and a hydrotalcite-type compound represented by general formula [chemical formula 1], wherein the content of the hydrotalcite-based compound is 0.03 to 1.0 wt%. Provided is a heat-ray-blocking fluororesin which can exhibit excellent heat-ray-blocking performance while keeping the properties inherent in fluororesin films, such as mechanical properties, transparency and long-term weatherability, and which is transparent and can be used out of doors for a long period of time.[Chemical formula 1]Mg^(2+)_(1-a)Al^(3+)_(a)(OH^(-))_(2)AN^(n-)_(a/n)cH_(2)O (Where 0.2 a 0.35 and 0 c 1; AN^(n-) indicates n-valent anion.)

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