Asahi Glass Company, Limited

Agc Inc.

Gm Global Technolgoy Operations, Inc.

Seigo Kotera

Satoru Hommura

Tetsuji Shimohira

Hiroshi Shimoda

Susumu Saito

Shinji Kinoshita

Yoshiaki Higuchi

Wataru Kasai

Hirokazu Wakabayashi

Kazuo Hamazaki

Yoshitaka Matsuyama

Koichi Murata

Atsushi Watakabe

Takashi Shibuya

Shigeru Aida

Toshihiro Tanuma

Hiroyuki Watabe

Hideki Nakagawa

Ichiro Terada

Ken Iruya

Taiki Hoshino

Isamu Kaneko

Eiji Endoh

Chunxin Ji

Shinji Wada

Tomoya Hosoda

Hubert Gasteiger

Shinji Terazono

Susan Yan

Bhaskar Sompalli

Daisuke Taguchi

Hiroshi Uyama

Masami Suzuki

Yoshinobu Takano

Katsuya Fujii

Junichi Tayanagi

Kohta Yamada

Jyunichi Tayanagi

Junetsu Nakamura

Takatoshi Yaoita

Tomoaki Nakanishi

Toshiaki Sawada

Atsuo Okawara

Chie Matsubara

Masanori Sawaguchi

Yuya Horiguchi

To provide a dielectric film which is excellent in dielectric properties and stability in the electric corrosion test and which is suitable for producing a high-precision printed board. A roll film comprising a melt-processable fluororesin as the main component and having a thickness of from 1 to 100 μm, the dimensional change rate of which is less than 1.0%, in terms of an absolute value, in each of MD and TD, when heated at 150° C. for 30 minutes and then cooled to 25° C., based on the dimension at 25° C.

Roll film, method for producing roll film, method for producing copper-clad laminate and method for producing printed board

As an exemplary configuration, a long film is configured by thermomeltable polymers including a first unit based on tetrafluoroethylene and a second unit based on perfluoro (alkyl vinyl ether), including spherulites of the thermomeltable polymers, wherein radius of each spherulite is 10 μm or less. As another exemplary configuration, a long film is configured by tetrafluoroethylene polymers having a melt flow rate within a range of 5 to 40 g/10 min. The long film is heated at 180° C. for 30 minutes so as to measure the thermal expansion rate, and when letting thermal expansion rate in a first direction, which extends at a 45-degree angle to a melt flow direction be A, and thermal expansion rate in a second direction orthogonal to the first direction be B, A and B are respectively within the range of −2 to +1%, and |A−B| is 1% or less.

Long film, method for producing long film, method for producing long multilayer body, and long multilayer body

To provide a laminate which has a heat sealing property, a barrier property and mechanical strength, of which elution of impurities from the surface to be in contact with a chemical solution is suppressed, and of which peeling and the like hardly occur at the sealed portion of a bag and at the interfaces between the layers of the laminate when exposed to high temperature, a bag using it and a lithium ion battery. A laminatecomprising a first layercontaining a fluororesin, a second layercontaining a barrier material, a third layercontaining a fluororesin and a fourth layercontaining a polyamide in this order, wherein each of the fluororesin in the first layerand the fluororesin in the third layeris a fluororesin having a melting point of from 160 to 230&#xb0; C. and having adhesive functional groups.

Layered body, bag and lithium ion cell

To provide a film capable of suppressing both of formation of wrinkles when a release film is suction-attached to a cavity surface in compression molding, and formation of wrinkles when the cavity bottom surface to which the release film has been suction-attached is raised; and a method for producing a semiconductor element by using said film. A laminated filmcomprises a layerof shrinkable film, of which the storage elastic modulus E' at 180&#xb0; C. is at least 70 MPa, and the thermal shrinkage in 30 minutes at 180&#xb0; C., with reference to 20&#xb0; C., in each of the machine direction (MD) and the transverse direction (TD), is at least 3%, and a fluororesin layerpresent on one side or both sides of the shrinkable film layer

Laminated film and method for producing semiconductor element

To provide a method for producing a fluororesin film, whereby defects due to deterioration (such as fish-eyes due to gelation) of a melt-processable fluororesin are less likely to occur during the production. A method for producing a fluororesin film, which comprises extruding a fluororesin material containing a melt-processable fluororesin through an extruder die, wherein the temperature of the extruder die is from 305 to 355&#xb0; C., and the average flow velocity vof the fluororesin material as obtained by v=Q/A, is at least 1&#xd7;10m/sec. Here, when the distance from the flow inletof the extruder die to the end of the manifoldof the extruder die is set to be x=1, Qis the flow rate (m/sec) of the fluororesin material flowing in the manifoldat a position of x=0.95 from the flow inlet, and Ais the cross-sectional area (m) of the manifoldat a position of x=0.95 from the flow inlet

Method for producing fluororesin film

To provide a resin composition having excellent mechanical strength and elongation, its melt-kneaded product and a molding product thereof. A resin composition comprising a fluororesin having a hydroxy group or a carbonyl group, an ester bond-containing resin having no fluorine atom and a transesterification catalyst, a melt-kneaded product obtained by melt-kneading the resin composition, a molding product, film or sheet obtained from the resin composition or the melt-kneaded product, a laminated product, a backsheet for a solar cell, and a method for producing a molding product using the resin composition or the melt-kneaded product.

Resin composition

To provide a film which is excellent in releasing property with respect to a resin sealed portion and excellent in low migration property and peeling property with respect to a semiconductor chip, a source electrode or a sealing glass and which is suitable as a mold release film for producing a semiconductor element having a part of the surface of a semiconductor chip, source electrode or sealing glass exposed. A filmwhich comprises a substrateand an adhesive layer, wherein the storage elastic modulus at 180&#xb0; C. of the substrateis from 10 to 100 MPa, and the adhesive layeris a reaction cured product of a composition for adhesive layer comprising a specific acrylic polymer and a polyfunctional isocyanate compound, wherein the number of moles Mof hydroxy groups and the number of moles Mof carboxy groups, derived from the acrylic polymer, and the number of moles Mof isocyanate groups derived from the polyfunctional isocyanate compound, satisfy a specific relation, and which is suitable as a mold release film for producing a semiconductor element.

Film, method for its production, and method for producing semiconductor element using the film

To provide a film or sheet and a screen excellent in visibility of a projected image, in see-through properties when an image is not projected and in bending resistance. A single-layer film or sheet comprising a fluororesin, a light-scattering agent and a light absorbing agent, characterized in that the light-scattering agent is at least one light-scattering agent selected from the group consisting of a titanium oxide-containing pigment, a zinc oxide-containing pigment and a cerium oxide-containing pigment, and the content thereof is from 0.01 to 0.175 g/m, and the light absorbing agent is at least one light absorbing agent selected from the group consisting of carbon black, a black interference aluminum pigment, black iron oxide and titanium black, and the content thereof is from 0.0005 to 0.035 g/m.

Film or sheet, and screen

To provide a polymer electrolyte membrane for polymer electrolyte fuel cells having high mechanical strength and excellent dimensional stability when it contains water even when it is made thin and the concentration of ionic groups is increased so as to reduce the electrical resistance, and a membrane/electrode assembly providing high output and having excellent durability.

Polymer electrolyte membrane composed of a fluorinated proton conductive polymer and a fluorinated reinforcing material

To obtain a nonwoven fabric which is excellent in the heat resistance and the chemical resistance, of which the fiber diameter is small, and which is excellent in the mechanical strength at a temperature at which it is used; and an electrolyte membrane which is excellent in the dimensional stability when it is swollen by water, and of which an increase in the resistance by a reinforcing material is suppressed. A nonwoven fabriccontaining fibersof an ethylene/tetrafluoroethylene copolymer having a storage elastic modulus E' at 25&#xb0; C. of at least 8&#xd7;10Pa and a melt viscosity measured at 300&#xb0; C. of higher than 60 Pa&#xb7;s and at most 300 Pa&#xb7;s, wherein the average fiber diameter of the fibers is from 0.01 to 3 &#x3bc;m; and an electrolyte membrane reinforced by the nonwoven fabric

Nonwoven fabric and electrolyte membrane

A process comprising: providing a substrate with a catalyst layer thereon; depositing a first ionomer overcoat layer over the catalyst layer, the first ionomer overcoat layer comprising an ionomer and a first solvent; drying the first ionomer overcoat layer to provide a first electrode ionomer overcoat layer; depositing a second ionomer overcoat layer over the first electrode ionomer overcoat layer, and wherein the second ionomer overcoat layer comprises an ionomer and a second solvent.

Method of making fuel cell components including a catalyst layer and a plurality of ionomer overcoat layers

To provide an electrolyte membrane having excellent dimensional stability even upon absorption of water, a high proton conductance and high power generation performance; and a process for producing the electrolyte membrane with a high productivity. An electrolyte membrane for polymer electrolyte fuel cells, which is made mainly of an ion exchange resin and reinforced with a nonwoven fabric made of fiber of a fluororesin wherein at least some of intersecting points of the fiber are fixed, and which has, as the outermost layer on one side or each side, a layer not reinforced, made of an ion exchange resin which may be the same as or different from the above ion exchange resin, wherein the fluororesin is an ethylene/tetrafluoroethylene copolymer having a melting point of at most 240&#xb0; C., and the above fixing is fixing by fusion of the fiber.

Electrolyte membrane for polymer electrolyte fuel cells, process for its production and membrane-electrode assembly for polymer electrolyte fuel cells

Provided is an electrolyte membrane containing: a reinforced inner layer; and an unreinforced outer layer on one or each side of the reinforced inner layer, wherein the reinforced inner layer includes an inner ion exchange resin reinforced with a non-woven fabric composed of a melt moldable fluororesin in the form of a continuous fiber, wherein a number of intersecting points of the continuous fiber are fused and/or bonded, and wherein the unreinforced outer layer includes an outer ion exchange resin, which may be the same as or different from the inner ion exchange resin. Also provided is a membrane electrode assembly for a polymer electrolyte fuel cell, wherein the membrane electrode assembly contains the above-mentioned polymer electrolyte membrane.

Electrolyte membrane, process for its production and membrane-electrode assembly for polymer electrolyte fuel cells

In the production of a membrane/electrode assembly, a first catalyst layer(a second catalyst layer) is formed by a process comprising steps (a) and (b). (a) A step of applying a coating fluid comprising a catalyst and an ion-exchange resin, on a substrate to form a coating fluid layer. (b) A step of disposing a reinforcing layer() on the coating fluid layer formed in the step (a) and then, drying the coating fluid layer to form a first catalyst layer(a second catalyst layer) The process provides a catalyst layer whereby defects such as cracks are scarcely formed in the catalyst layer, and the bond strength is high at the interface between the catalyst layer and a reinforcing layer and at the interface between the catalyst layer and a polymer electrolyte membrane.

Process for forming catalyst layer, and process for producing membrane/electrode assembly for polymer electrolyte fuel cell

To provide a process whereby an ultrafine fiber of a fluorinated ion exchange resin can be produced easily at low cost, and a method whereby a catalyst layer having a high gas diffusion property can be produced easily at low cost. A process for producing a fiber by spinning a spinning solution containing a fluorinated ion exchange resin and a solvent by a dry spinning method, or producing an electrically conductive composite fiber by spinning n types (where n is an integer of at least 2) of spinning solutions, of which at least one type contains a fluorinated ion exchange resin and a solvent, and at least one type contains an electrically conductive material and a solvent, simultaneously by a dry spinning method, wherein the spinning solution which is being spun by the dry spinning method, is stretched by a gas stream; and a method for producing a catalyst layer, which comprises accumulating the fiber produced by such a process to form a non-woven fabric thereby to obtain a catalyst layer having the non-woven fabric.

Process for producing fiber and method for producing catalyst layer

Growing community of inventors

Chiyoda-ku, Japan

Seigo Kotera