Daicel Chemical Industries, Ltd.

The Furukawa Electric Co., Ltd.

Uacj Corporation

Citizen Watch Company, Ltd.

Kawasaki Steel Corporation

Asahi Kasei Kabushiki Kaisha

Minoru Hayashi

Kazuhiko Saigo

Yukihiko Hashimoto

Yoichiro Bekki

Kotaro Kitawaki

Hirofumi Ono

Mikihiko Nakamura

Tomoki Sakai

Yuya Sawa

Yoshiji Hashimoto

Toshikazu Hisamoto

Tetsushi Habu

Ryo Syoji

Hirofumi c/o Asahi Kasei Kabushiki Kaisha Ono

The present invention relates to a high-strength aluminum alloy thick plate composed of an aluminum alloy including a prescribed quantity of Si, Mg, Ti, Fe, and the balance Al. The thick plate has a material structure in which an area ratio of MgSi having circle equivalent diameters of 3 &#x3bc;m or more in a plate thickness central portion is 0.45% or less; and an area ratio of MgSi having circle equivalent diameters of 3 &#x3bc;m or more in a region of 20 mm&#xb1;1.5 mm from a plate surface in a plate thickness direction is 1.2 times or more and 3.0 times or less the area ratio of MgSi having circle equivalent diameters of 3 &#x3bc;m or more in the plate thickness central portion. The aluminum alloy thick plate has sufficient strength and good uniformity of strength in the plate thickness direction, and can be manufactured by cooling it after a solution treatment, so that suitable temperature difference occurs between a plate thickness central portion and a surface, and then performing a quenching treatment.

High-strength 6000-based alloy thick plate having uniform strength in plate thickness direction and method for manufacturing the same

An aluminum alloy plate for a magnetic disk substrate with a flat and smooth ground surface, a production method by which the aluminum alloy plate can be produced at low cost and a magnetic disk are shown. An aluminum alloy plate for a magnetic disk substrate which comprises an aluminum alloy containing Mg: 3.0 to 8.0 mass % (hereinafter %), Cu: 0.005 to 0.150%, Zn: 0.05 to 0.60%, Cr: 0.010 to 0.300%, Fe: 0.001 to 0.030%, Si: 0.001 to 0.030%, (Ti+V+Zr): 0.0010 to 0.0100%, B: 0.0001 to 0.0010% with a balance being Al and inevitable impurities, wherein the density of a Ti&#x2014;V&#x2014;B&#x2014;Zr-based inclusion having a maximum diameter exceeding 5 &#x3bc;m is 0 piece/6000 mmand the density of a Ti&#x2014;V&#x2014;B&#x2014;Zr-based inclusion having a maximum diameter of 3 to 5 &#x3bc;m is 1 piece/6000 mmor less; a production method thereof; and a method for producing a magnetic disk.

Aluminum alloy plate for magnetic disc substrate, method for manufacturing same, and method for manufacturing magnetic disc

Disclosed is a cellulose nonwoven fabric containing cellulose fibers having a maximum fiber diameter of not more than 1500 nm and a crystallinity determined by solid state NMR techniques of not less than 60%. The porosity of the cellulose nonwoven fabric is not less than 40% and not more than 99%.

Cellulose nonwoven fabric

A catalyst for the bisalkoxycarbonylation of olefins comprising a noble metal compound and a phosphine chalcogenide of the following formula (1):

Catalyst for bisalkoxycarbonylation of olefins, and method for production of succinate derivatives

A catalyst for the bisalkoxycarbonylation of olefins comprising a noble metal compound and a phosphine chalcogenide of the following formula (1): ##STR1## wherein each of R.sup.1, R.sup.2 and R.sup.3 is, independently, an alkyl group or an aryl group each of which may have a substituent, and A is a Group 16 element of the Periodic Table; and R.sup.1, R.sup.2 or R.sup.3 may be combined, directly or through a bridging group, with one another where the groups to be combined may be attached either to an identical phosphorus atom or to different phosphorus atoms. Element A includes oxygen, sulfur and selenium atoms. The noble metal compound includes palladium(II) halides and other palladium compounds. The catalyst may further include a copper (I) halide or other copper compound as a co-catalyst. The use of this catalyst can provide the bisalkoxycarbonylation of olefins with efficiency.

Catalyst for bisalkoxycarbonylation of olefins, and method for

A method for manufacturing an aluminum alloy sheet suitable for high-speed forming includes subjecting the alloy to a homogenization treatment, hot rolling and cold rolling the homogenization treated alloy, thereby obtaining a cold-rolled sheet, and annealing the cold-rolled sheet. The aluminum alloy contains 4.0 to 10.0 wt. % of Mg, 0.2 wt. % of inevitable impurities of Fe and Si, 0.05 wt. % of other impurity elements, and the balance of Al. Another embodiment includes deep drawing the aluminum alloy sheet.

Aluminum alloy sheet suitable for high-speed forming and process for

A method for manufacturing an aluminum alloy sheet for use in a body panel material, comprising: (a) casting a melted aluminum alloy containing Al, Mg, Fe, Mn, Cr, Ti and Zr, having a Mg content of 4 to 10 weight %, and having contents of Fe, Mn, Cr, Ti and Zr which are determined by a value f satisfying the following equation (I), and the balance being Al: 0.4 wt %.ltoreq.f.ltoreq.1.5 wt % (I), wherein, f=(Fe)+1.1 (Mn)+1.1 (Cr)+3 (Ti)+3 (Zr), wherein (Fe), (Mn), (Cr), (Ti), and (Zr) respectively represent the percentage content by weight of Fe, Mn, Cr, Ti and Zr, to form an ingot; (b) hot rolling the ingot to obtain a hot rolled sheet; (c) cold rolling the hot rolled sheet at a cold reduction R satisfying the following equation (II): -log(f-0.2)+8.ltoreq.R.ltoreq.-60 log (f-0.2)+50 (II) to obtain a cold rolled sheet; (d) subjecting the cold rolled sheet to a final annealing treatment including raising the temperature of the rolled sheet to 450.degree. to 550.degree. C. at a rate of 100.degree. C./minute or more, and maintaining the attained temperature for 300 seconds or less; and (e) cooling the annealed rolled sheet at a cooling rate of 100.degree. C./minute or more to obtain an aluminum alloy sheet having a grain size of 20 and 80 .mu.m.

Method of manufacturing an aluminum alloy sheet for body panel and the

A pocket size personal organizer including a CPU for carrying out a data processing operation, an LCD cell for displaying the operation result of the CPU and X- and Y-drivers for driving the LCD cell. The electronic device is separated into a body member and a cover member which are collapsibly connected to each other. The CPU and one of the drivers are arranged in the body member, and the LCD cell and the other driver are arranged in the cover member. An electrical connection between the parts is carried out by heat seal connectors arranged at a hinge bridge portion.

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Tokyo, Japan

Minoru Hayashi