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Patent
The Film Co | Date: 2017-04-05

The touch display device includes a cover plate, a touch sensor unit, a display unit and a pressure sensor unit. The touch sensor unit is configured to sense a touch signal applied to the cover plate, the display unit includes a liquid crystal function layer and a backlight module. The pressure sensor unit includes an upper conductive electrode layer and a lower conductive electrode layer, which cooperative forming a capacitance sensor to sense a pressure signal applied to the cover plate. The upper conductive electrode layer is positioned between the liquid crystal function layer and the backlight module. The lower conductive electrode layer is positioned beneath a side of a reflector of the backlight module away from the light guide plate.


Patent
The Film Co | Date: 2017-02-01

The present invention provides a production method of a microporous plastic film that achieves various characteristics such as strength while having an excellent appearance grade by using a wet stretching method. The production method of a microporous plastic film according to the present invention comprises: kneading a diluent and a polymer with an extruder; discharging the polymer kneaded with the diluent into a sheet from a mouthpiece; and stretching the sheet discharged from the mouthpiece in a conveying direction of the sheet with a plurality of rollers; the diluent being applied to at least one of the plurality of rollers and/or the sheet in the step of stretching the sheet in the conveying direction of the sheet.


An object is to prevent the occurrence of sheet defects by preventing the dropping of a liquid of low-molecular-weight components in a polymer, diluents, and additives adhering to a rectifier disposed inside a decompression chamber in a production method for a microporous polyolefin resin sheet including discharging a solution including a mixture of a polyolefin resin and a diluent in a sheet shape from a mouthpiece to a cooling/hardening device and cooling the sheet while aspirating the air between the sheet and the cooling/hardening device with an aspiration chamber. Another object is to forcibly aspirate a liquid of low-molecular-weight components in a polymer, diluents, and additives adhering to the rectifier by, while using a production device for a microporous polyolefin resin sheet having a mouthpiece that discharges a liquid including a mixture of a polyolefin resin and a diluent in a sheet shape, a cooling/hardening device that cools the sheet discharged from the mouthpiece, and a decompression chamber that aspirates the air between the sheet and the cooling/hardening device, disposing a rectifier inside the decompression chamber, aspirating each of the inside of the decompression chamber and the inside of the rectifier, and keeping the pressure inside the rectifier lower than the pressure inside the decompression chamber.


Patent
The Film Co | Date: 2017-01-04

The purpose of the present invention is to provide a surface protection film that satisfies handling properties represented by anti-blocking properties, and various and numerous workability properties, including, favorable heat resistance and cutting properties, and the like. Provided is a surface protection film for a heating process, characterized by being formed from a compound form in which an adhesive layer (A), an intermediate layer (C), and a back layer (3) are layered in that order, the (A) layer comprising a polyethylene-based resin (a1) and a tackifier (a2) or an elastomer (a3), the (B) layer and the (C) layer each comprising a polypropylene-based resin (b) and a polypropylene-based resin (c), and the difference |_(C) -_(A)| between the density (_(C)) of the (C) layer resin composition and the density (_(A)) of the (A) layer resin composition and the difference |_(C) - _(B)| between the density (_(C)) of the (C) layer resin composition and the density (_(B)) of the (B) layer resin composition each being 0.020 g/cm^(3) or less.


The present invention provides a production method for a microporous polyolefin resin sheet which enables the stable formation of a sheet having uniform crystallinity, even when the speed of the casting cooling device is high, and has excellent thickness uniformity and appearance grade. The production device for a microporous polyolefin resin sheet according to the present invention includes a mouthpiece that extrudes a molten resin in a sheet shape; a casting cooling device that cools and solidifies a sheet extruded from the mouthpiece while conveying the sheet; and a decompression chamber that is installed upstream from the mouthpiece in a conveying direction of the casting cooling device and aspirates air between the sheet extruded from the mouthpiece and the casting cooling device; and further includes a rectifier that is installed and blocks a gap between the sheet discharged from the mouthpiece and the cast surface. The decompression chamber of the production device for a microporous polyolefin resin sheet according to the present invention includes: a sealing member provided in at least a peripheral portion of a surface opposing the casting cooling device and in physical contact with the casting cooling device; and a partition plate provided across a sheet width direction in a vicinity of an opening part opposing the mouthpiece.


Considering that battery separators will require further thinner materials and lower costs in the future, a multi-layer polyolefin porous membrane for laminating a modified porous layer, which has an exceptionally high peel strength to a modified porous layer, and is suitable for high-speed processing during slit process and battery assembly process, and a battery separator, on which the modified porous layer is laminated, is provided. A multi-layer polyolefin porous membrane comprising at least two layers; protrusions made of polyolefin satisfying 5 m W 50 m (where W is a protrusion size) and 0.5 m H (where H is a protrusion height) and being irregularly disposed on one side of the multi-layer polyolefin porous membrane at a density of not less than 3 protrusions/cm^(2) and not more than 200 protrusions/cm^(2); a meltdown temperature being not lower than 165C; an air permeation resistance being not greater than 300 sec/ 100 cc Air; and a membrane thickness being not greater than 20 m.


The present invention provides a polyolefin microporous membrane which has a small pore size and excellent shutdown characteristics and is suitable for use as a separator for a non-aqueous electrolyte secondary battery. The present invention provides a polyolefin microporous membrane in which the difference between the shutdown starting temperature in the MD and the maximum shrinkage temperature in the MD is not less than 8.6C, and the maximum pore size is less than 0.036 m. In addition, the present invention provides a production method for a polyolefin microporous membrane comprising melt-kneading a polyolefin resin containing an ultrahigh molecular weight polyolefin and a plasticizer, forming the mixture into a sheet shape, performing stretching in the MD and simultaneous biaxial stretching on the obtained sheet, and then drying the stretched sheet.


Patent
The Film Co | Date: 2017-03-02

A polyolefin microporous membrane includes a polyethylene composition, and 0.5% or more but less than 5% by mass of polypropylene, wherein the polyethylene composition includes polyethylene having a mass average molecular weight of 2.510^(5 )to 510^(5 )and ultrahigh molecular weight polyethylene having a mass average molecular weight of 110^(6 )to 310^(6 )in an amount of more than 5% by mass and not more than 50% by mass based on 100% by mass of polyethylene composition and has a molecular weight distribution (Mw/Mn) of 5.0 to 300, and the polyolefin microporous membrane has an injection of electrolyte of 20 seconds or less and a uniform polypropylene distribution in at least one plane perpendicular to the thickness direction.


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 microporous membrane suitable for providing a porous layer exhibiting less variation in thickness and having a width not less than 100 mm, wherein a variation range of an F25 value in the width direction is not greater than 1 MPa, wherein the F25 value is a value obtained by dividing a load at 25% elongation of a sample piece using a tensile testing machine by a cross-sectional area of the sample piece.

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