Abstract: A nonaqueous electrolyte secondary battery separator which has a low shutdown temperature, a high mechanical strength, and a high ion permeability is provided. The nonaqueous electrolyte secondary battery separator contains a polyolefin-based resin as a main component. The nonaqueous electrolyte secondary battery separator has a maximum heating value of not less than 30 mW/g observed during isothermal crystallization of the nonaqueous electrolyte secondary battery separator at 128° C.

Abstract: A nonaqueous electrolyte secondary battery separator having excellent impact absorbency includes a polyolefin porous film having a full width W at half maximum of a peak of an MD component of not less than 30 degrees. The full width W at half maximum of the peak of the MD component is calculated from an azimuthal profile of a scattering peak on a plane obtained by wide-angle X-ray scattering measurement that is carried out by irradiating a surface of the polyolefin porous film with an X-ray from a direction vertical to the surface of the polyolefin porous film, and/or having a maximum-to-minimum intensity ratio r of not more than 3.6. The maximum-to-minimum intensity ratio r is calculated from a Fourier transformed azimuthal profile obtained by observing the surface of the polyolefin porous film by SEM.

Abstract: A nonaqueous electrolyte secondary battery separator having excellent impact resistance contains a polyolefin porous film. The nonaqueous electrolyte secondary battery separator has a (200) plane peak area ratio R of not less than 0.15; the (200) plane peak area ratio R is a ratio of a peak area I(200) of a diffraction peak on a (200) plane to a peak area I(110) of a diffraction peak on a (110) plane and is calculated from a diffraction intensity profile obtained by wide-angle X-ray diffraction that is carried out by irradiating a surface of the nonaqueous electrolyte secondary battery separator with an X-ray from a direction vertical to the surface of the nonaqueous electrolyte secondary battery separator.

Abstract: An inspection method with which a separator having improved quality can be efficiently obtained is provided. The inspection method is a method for inspecting a nonaqueous electrolyte secondary battery separator that includes a polyolefin porous film. The inspection method includes a step of detecting a defect in the polyolefin porous film with the use of a color camera.

Abstract: A nonaqueous electrolyte secondary battery separator which has a low shutdown temperature, a high mechanical strength, and a high ion permeability is provided. The nonaqueous electrolyte secondary battery separator contains a polyolefin-based resin as a main component. The nonaqueous electrolyte secondary battery separator has a maximum heating value of not less than 30 mW/g observed during isothermal crystallization of the nonaqueous electrolyte secondary battery separator at 128° C.

Abstract: An object of an embodiment of the disclosure is to provide a nonaqueous electrolyte secondary battery separator having an excellent withstand voltage property. A nonaqueous electrolyte secondary battery separator in accordance with an embodiment of the disclosure includes a polyolefin porous film having a thickness of 4 ?m to 40 ?m. The polyolefin porous film does not break in a puncture test in which a pin having a diameter of 1 mm and a tip radius of 0.5R is thrust at a speed of 1 mm/s to a depth of 2.5 mm.

Abstract: A method of producing a film is provided. The film includes a base material layer which is shrunk by heat and a functional layer which is dried while being restricted by the base material layer. The method involves heating the film while applying a tensile force in a direction of a length of the film so as to convey the film, and subjecting the film to a heat treatment while, in a distribution along a width of the film, a center part is higher in temperature than end parts. A center part sample of the film is smaller in curling amount with respect to the width of the film than an end part sample, or a standard deviation in curling amount with respect to the width is not more than 1 mm between two samples from respective end parts and a sample from the center part of the film.

Abstract: A method of producing a film is provided. The film includes a base material layer which is shrunk by heat and a functional layer which is dried while being restricted by the base material layer. The method involves heating the film while applying a tensile force in a direction of a length of the film so as to convey the film, and subjecting the film to a heat treatment while, in a distribution along a width of the film, a center part is higher in temperature than end parts. A center part sample of the film is smaller in curling amount with respect to the width of the film than an end part sample, or a standard deviation in curling amount with respect to the width is not more than 1 mm between two samples from respective end parts and a sample from the center part of the film.

Abstract: To provide a conveyer device that can prevent a sheet-shaped base material comprising a fluid plasticizer from slipping in the lengthwise direction of a roller and thereby prevent a flaw such as a wrinkle in the sheet-shaped base material comprising a fluid plasticizer, the sheet-shaped base material extending in a longitudinal direction and having a width defined in a direction orthogonal to the longitudinal direction, a conveyer device (1) includes a plurality of rollers (R1 and 102), at least one roller (R1) of the plurality of rollers (R1 and 102) having a length not smaller than the width of the sheet-shaped base material (S1), the plurality of rollers (R1 and 102) having a slipping preventing mechanism configured to prevent the sheet-shaped base material (S1) from slipping on the at least one roller (R1).

Abstract: Provided is a nonaqueous electrolyte secondary battery separator including a porous film containing, as a main component, polyolefin having a weight average molecular weight of not less than 500,000, the nonaqueous electrolyte secondary battery separator having an MD orientation ratio of 58% to 80%, a degree of MD orientation of 70% to 80%, and a degree of TD orientation of 65% to 85%, the nonaqueous electrolyte secondary battery separator having a film thickness of not more than 14 ?m, and the nonaqueous electrolyte secondary battery separator being excellent in shutdown temperature and puncture strength.

Abstract: Provided is a nonaqueous electrolyte secondary battery separator including a porous film containing, as a main component, polyolefin having a weight average molecular weight of not less than 500,000, the nonaqueous electrolyte secondary battery separator having an MD orientation ratio of 58% to 80%, a degree of MD orientation of 70% to 80%, and a degree of TD orientation of 65% to 85%, the nonaqueous electrolyte secondary battery separator having a film thickness of not more than 14 ?m, and the nonaqueous electrolyte secondary battery separator being excellent in shutdown temperature and puncture strength.

Abstract: A nonaqueous electrolyte secondary battery separator includes a porous film containing, as a main component, polyethylene having a weight average molecular weight of not less than 500,000, the nonaqueous electrolyte secondary battery separator having a peak area ratio R of not less than 0.90, the peak area ratio R (i) being defined by areas I(110) and I(200) of diffraction peaks on (110) and (200) planes of a crystal of the polyethylene, the diffraction peaks being detected in a case where the porous film is irradiated with an X-ray from a thickness direction of the porous film, and (ii) being represented by the following equation: R=I(110)/(I(110)+I(200)), and the nonaqueous electrolyte secondary battery separator having a film thickness of not more than 14 ?m.

Abstract: 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.

Abstract: Disclosed is a porous electrode comprising a porous film (A) with through pores and an electrically conducting material selected from the group consisting of conductor and semiconductor, the porous film (A) having an average pore size d1 of from 0.02 to 3 ?m and a porosity of from 40 to 90%, the electrically conducting material being filled in the through pores of the porous film (A). A dye-sensitized solar cell and an electric double layer capacitor including the porous electrode as a constituent are also disclosed.

Abstract: Disclosed is a porous electrode comprising a porous film (A) with through pores and an electrically conducting material selected from the group consisting of conductor and semiconductor, the porous film (A) having an average pore size d1 of from 0.02 to 3 ?m and a porosity of from 40 to 90%, the electrically conducting material being filled in the through pores of the porous film (A). A dye-sensitized solar cell and an electric double layer capacitor including the porous electrode as a constituent are also disclosed.

Abstract: Provided is a porous film formed from a polyolefin-based resin containing an ethylene-?-olefin copolymer including a structural unit derived from ethylene and a structural unit derived from one or more kinds of monomers selected from ?-olefins having 4 to 10 carbon atoms, wherein a shutdown temperature is 125° C. or lower.

Abstract: Provided is a laminated porous film formed by laminating a heat-resistant resin layer on a porous film made from a polyolefin-based resin containing an ethylene-?-olefin copolymer including a structural unit derived from ethylene and a structural unit derived from one or more kinds of monomers selected from ?-olefins having 4 to 10 carbon atoms, wherein a shutdown temperature is 125° C. or lower and a thermal film breakage temperature is 155° C. or higher.

Abstract: Disclosed is a method for producing a laminated porous polyolefin film, the method comprising steps of: providing a pair of tools for thermocompression bonding two resin films therebetween, laminating two films each comprising at least one layer made of a polyolefin resin composition comprising 100 parts by weight of a polyolefin resin having a melt index of 0.1 g/10 min or less and 80 to 300 parts by weight of a filler to form a laminated film by piling and thermocompression bonding the films between the thermocompressing portions of the tools, wherein the surface temperature of each thermocompressing portion is adjusted to a temperature higher than the melting point of the polyolefin resin by from 5 to 25° C. during the lamination, and drawing the laminated film to form micropores therein, thereby yielding a porous film.

Abstract: A film-like materials of resin manufacturing method for producing a film-like material made of a resin by rolling a thermoplastic resin material containing a thermoplastic resin using a molding apparatus comprising first rotation molding members composed of a pair of rollers, wherein the method is characterized in that the rotation molding is carried out under the conditions satisfying the following inequalities of the line contact pressure P (kN/m) applied to the thermoplastic resin, the peripheral velocity R (m/sec) of the rollers of the first rotation molding members, and the thickness H (m) of the film-like material made of the resin after rolling. (formula 1) 3×9.8?P (formula 2) 3×9.8×10?6?P/(R/H2)?2×9.8×10?5, wherein the reference character P denotes the line contact pressure P (kN/m), the reference character R denotes the peripheral velocity (m/sec) of the rotation molding members, and the reference character H denotes the thickness (m) of the film-like material made of the resin after rolling.

Abstract: Disclosed is a porous film formed of a polyolefin resin comprising an ethylene-?-olefin copolymer (A) which comprises structural units originating from ethylene and structural units originating from one or more sorts of monomers selected from ?-olefins having 4-8 carbon atoms and which satisfies the requirements (I) the intrinsic viscosity [?] is 9.0 to 15.0 dl/g; (II) the melting point Tm is not lower than 115° C. but lower than 130° C.; (III) the content of cold-xylene-soluble components included in the ethylene-?-olefin copolymer (A) is 3% by weight or less; and (IV) Tm?0.54×[?]+114. A battery separator including the porous film and a method for the preparation of the porous film are also disclosed.