Abstract: A first aspect of the present invention is carbon fiber wherein the surface of a monofilament has a center line average roughness Ra of 6.0 nm or more and 13 nm or less, and the monofilament has a long diameter/short diameter ratio of 1.11 or more and 1.245 or less. A second aspect of the present invention is carbon fiber precursor acrylic fiber wherein the surface of a monofilament has a center line average roughness Ra of 18 nm or more and 27 nm or less, and the monofilament has a long diameter/short diameter ratio of 1.11 or more and 1.245 or less. The carbon fiber according to the first aspect is obtained by stabilizing and carbonizing under specific conditions the carbon fiber precursor acrylic fiber according to the second aspect.

Abstract: The present invention provides a transparent electroconductive laminate suitable for use in combination with a display device such as a liquid crystal display, and a transparent touch panel having the transparent electroconductive laminate. The transparent electroconductive laminate comprises a transparent organic polymer substrate 33 having, on at least one surface thereof, a hardcoat (HC) layer 33h, an optical interference layer 32, and a transparent electroconductive layer 31 in this order. The transparent electroconductive laminate satisfies the following conditions: the refractive indexes n3 and n3h of the transparent organic polymer substrate and the HC layer satisfy the following formula: |n3?n3h|?0.02, the thickness of the HC layer is from 1 to 10 ?m, the thickness of the optical interference layer is from 5 to 500 nm, the thickness of the transparent electroconductive layer is from 5 to 200 nm, the total light transmittance is 85% or more, and the b* value is from ?1.0 to less than 1.

Abstract: A vehicle energy absorption structure includes an energy absorption member made of fiber reinforced resin. At least part, in a thickness direction, of that wall extending in a load input direction of the energy absorption member is provided with a plurality of discontinuous portions discontinued from each other in the load input direction, the plurality of discontinuous portions being arranged along the load input direction.

Abstract: A vehicle energy absorption structure includes an energy absorption member made of fiber reinforced resin. At least part, in a thickness direction, of that wall extending in a load input direction of the energy absorption member is provided with a plurality of discontinuous portions discontinued from each other in the load input direction, the plurality of discontinuous portions being arranged along the load input direction.

Abstract: The purpose of the present invention is to provide a transparent conductive laminate that will not break by being bent. Another purpose of the present invention is to provide a transparent touch panel comprising such a transparent conductive laminate. A transparent conductive laminate of the present invention has a cured resin layer and a transparent conductive layer laminated on at least one face of a transparent organic-polymer substrate. The resin composition constituting the cured resin layer has a recovery rate (?IT), which is indicated in the following formula, of 60% or less, for a cured resin layer having a thickness of 5 ?m, in an indentation hardness test (testing load: 1 mN) conforming to ISO14577-1: 2002. ?IT=Welast/Wtotal×100(%) (wherein Welast is indentation work (Nm) generated by elastic returning deformation, and Wtotal is mechanical indentation work (Nm)).

Abstract: The present invention provides a transparent electroconductive laminate suitable for use in combination with a display device such as a liquid crystal display, and a transparent touch panel having the transparent electroconductive laminate. The transparent electroconductive laminate comprises a transparent organic polymer substrate 33 having, on at least one surface thereof, a hardcoat (HC) layer 33h, an optical interference layer 32, and a transparent electroconductive layer 31 in this order. The transparent electroconductive laminate satisfies the following conditions: the refractive indexes n3 and n3h of the transparent organic polymer substrate and the HC layer satisfy the following formula: |na?n3h|0.02, the thickness of the HC layer is from 1 to 10 ?m, the thickness of the optical interference layer is from 5 to 500 nm, the thickness of the transparent electroconductive layer is from 5 to 200 nm, the total light transmittance is 85% or more, and the b* value is from ?1.0 to less than 1.

Abstract: The present invention provides a transparent electroconductive laminate having a combination of high transparency, small haze and sufficient lubricity; and a transparent touch panel comprising such a transparent electroconductive laminate. The transparent electroconductive laminate of the present invention comprises a transparent organic polymer substrate which has, on at least one surface thereof, a cured resin layer, and a transparent electroconductive layer in this order, and satisfies the following conditions (a) the cured resin layer contains a resin component and first ultrafine particles having an average primary particle diameter of 1 to 100 nm, (b) the resin component and the first ultrafine particles contain the same metal and/or metalloid element, and (c) in the cured resin layer, the content of the first ultrafine particles is from 0.01 to 3 parts by mass per 100 parts by mass of the resin component, and (d) the cured resin layer has a thickness of 0.01 to 2 ?m.

Abstract: An object of the present invention is to provide a hot-dip galvanized steel sheet which is excellent in adhesion with a hot-dip galvanized zinc layer, and has high tensile strength and good formability even when a steel sheet containing Si and Mn in relatively larger amounts is used as a basis steel sheet. The hot-dip galvanized steel sheet is composed of: a basis steel sheet containing Si in an amount of 0.05 to 2.5% and Mn in an amount of 0.2 to 3%, by mass; a Fe plated layer formed on the basis steel sheet; and a hot-dip galvanized zinc layer formed on the surface layer of the basis steel sheet via the Fe plated layer, wherein oxides containing Si and/or Mn are discontinuously dispersed in the vicinity of the interface between the basis steel sheet and the Fe plated layer.

Abstract: An object of the present invention is to provide a hot-dip galvanized steel sheet which is excellent in adhesion with a hot-dip galvanized zinc layer, and has high tensile strength and good formability even when a steel sheet containing Si and Mn in relatively larger amounts is used as a basis steel sheet. The hot-dip galvanized steel sheet is composed of: a basis steel sheet containing Si in an amount of 0.05 to 2.5% and Mn in an amount of 0.2 to 3%, by mass; a Fe plated layer formed on the basis steel sheet; and a hot-dip galvanized zinc layer formed on the surface layer of the basis steel sheet via the Fe plated layer, wherein oxides containing Si and/or Mn are discontinuously dispersed in the vicinity of the interface between the basis steel sheet and the Fe plated layer.

Abstract: A hot-dip galvanized steel sheet composed of a basis steel sheet containing Si in an amount of 0.05-2.5 mass % and Mn in an amount of 0.2-3 mass % and a hot-dip galvanized zinc layer formed on the surface thereof, wherein said hot-dip galvanized zinc layer is formed in such a way that there is an Si—Mn enriched phase which is found, by observation under a scanning electron microscope or a transmission electron microscope, in the vicinity of the interface in a region no shorter than 50 &mgr;m in the cross section perpendicular to the interface between the basis steel sheet and the hot-dip galvanized zinc layer, said Si—Mn enriched phase containing more than twice as much Si and/or Mn as the basis steel sheet and extending over a length no more than 80% of the length of the interface observed. This hot-dip galvanized steel sheet is free of bare spots even in the case where the basis steel sheet contains Si and Mn in a comparatively large amount and hence is liable to suffering bare spots.

Abstract: A hot-dip galvanized steel sheet composed of a basis steel sheet containing Si in an amount of 0.05-2.5 mass % and Mn in an amount of 0.2-3 mass % and a hot-dip galvanized zinc layer formed on the surface thereof, wherein said hot-dip galvanized zinc layer is formed in such a way that there is an Si-Mn enriched phase which is found, by observation under a scanning electron microscope or a transmission electron microscope, in the vicinity of the interface in a region no shorter than 50 &mgr;m in the cross section perpendicular to the interface between the basis steel sheet and the hot-dip galvanized zinc layer, said Si-Mn enriched phase containing more than twice as much Si and/or Mn as the basis steel sheet and extending over a length no more than 80% of the length of the interface observed. This hot-dip galvanized steel sheet is free of bare spots even in the case where the basis steel sheet contains Si and Mn in a comparatively large amount and hence is liable to suffering bare spots.

Abstract: The present invention relates to a coating film excellent in resistance to corrosive halogen-containing gas and halogen-containing plasma, a method for producing the same, and technology utilizing the same.More specifically, the coating film includes an aluminum oxide as an essential material and silicon-containing material, and the coating film has such a tightness that the content of the silicon-containing material is 5 wt % or less when reduced to silicon. In other word, the coating film has no peak of a half-value width of 5.degree. or less in X-ray diffraction. In still other word, the coating film is a little short of oxygen having an oxygen-to aluminum atomic ration of 1.3 or more to below 1.5. The present invention provides a laminated structure coated with such a coating film such as a window material for use in a vacuum apparatus, and a method for producing the window material.

Abstract: Surface-treated Al or Al alloy materials which excel in adhesive property, formability, weldability, phosphatability, paint adhesion, and post-painting corrosion resistance are provided by forming a coated layer containing Zn and Fe or one or more of Si oxides, Al oxides and Al hydroxides together therewith, on the surface of Al or Al alloy base. The surface-treated Al or Al alloy materials are useful as metallic material to be painted and used after press forming and other processing, spot or laser welding and phosphating, including panel materials for automobiles and other various vehicles, shells for housefold electrical apparatus, and building materials.

Abstract: An aluminum alloy material having a surface suitable for zinc phosphate processing prepared by a process comprising the steps of (1) cleaning the aluminum alloy surface, and (2) forming a composite film layer comprising Zn metal, Ni or Mn metal, and silicon oxide on the surface of the aluminum alloy.

Abstract: The present invention discloses a surface treated material of excellent adhesion for painting layer, corrosion resistance after painting and press formability, containing, in a Zn or Fe series plating layer, a (meth)acrylic polymer having repeating units of a (meth)acrylic acid derivative in which a compound having an epoxy group is added to a chemical formula represented by: ##STR1## where X represents --NH-- or --O--, A represents C.sub.n H.sub.2n, n is 0 or a positive integer, R represents --H or --CH.sub.3, and R.sub.1, R.sub.2 which may be identical or different with each other represents H or alkyl group.