TOYO KOHAN CO., LTD.

Provided is a surface-treated steel sheet comprising a steel sheet, and an Fe—Ni diffusion layer formed on the topmost surface of at least one surface of the steel sheet, wherein when a maximum diffraction intensity I A at a diffraction angle 2θ of 43.00° or more and 44.30° or less and a maximum diffraction intensity I B at a diffraction angle 2θ of 44.51° or more and 45.00° or less are obtained by thin film X-ray diffractometry performed on the surface of the Fe—Ni diffusion layer, the ratio I B /I A is 0.01≤I B /I A ≤0.37.

The problem solved by the present invention is to provide a pinhole detection device with an improved accuracy of detecting pinholes. The detection unit of the pinhole detection device includes a plurality of optical fibers that transmit light that has passed through the object to be inspected. The plurality of optical fibers are arranged side by side while facing a light source. When a maximum detectable angle at which the pinhole with respect to an optical axis of the light source is detectable is defined as θ, a maximum angle of incidence of light that can be transmitted by the optical fiber with respect to the optical axis of the light source is set in a range of θ+0° to θ+5°.

Provided is a surface-treated metal sheet for batteries, comprising a metal base material, a nickel layer formed on at least one side of the metal base material, and a tin layer formed as an overlay on the nickel layer, wherein with respect to the tin layer, at least one of the result of Formula (1) below and that of Formula (2) below exceeds 1: N ⁡ ( 2 ⁢ 20 ) / N ⁡ ( 200 ) > ( 1 ) N ⁡ ( 220 ) / N ⁡ ( 4 ⁢ 0 ⁢ 0 ) > ( 2 ) where in Formulae (1) and (2), N(220) represents an index of crystal orientation in a (220) plane in the tin layer, in Formula (1), N(200) represents an index of crystal orientation in a (200) plane in the tin layer, and in Formula (2), N(400) represents an index of crystal orientation in a (400) plane in the tin layer.

The present invention has as its object the provision of a surface-treated sheet for an alkaline secondary battery, which has gas evolution suppressing effect and also has resistance to an alkaline electrolyte solution. A surface-treated sheet 100 of the present invention for an alkaline secondary battery has a base material 10 , and a metal layer 20 formed on at least one side of the base material 10 . The metal layer 20 includes an alloy layer 20 M that contains Ni and Zn, the alloy layer includes a first region 20 A in which a proportion of Ni is 60% to 85% based on a total content of Ni and Zn, and the first region 20 A has a thickness of 0.15 μm or greater.

[Object] To provide a resin-coated aluminum can lid having resin adhesiveness, corrosion resistance, and a color tone in combination. [Solving Means] A resin-coated aluminum can lid includes an aluminum base material, a surface treatment layer formed on at least one side of the aluminum base material, and a resin layer formed on the surface treatment layer. The surface treatment layer contains aluminum hydroxide, and has a Pa/Pb value of 0.14 to 3.50 when, in an infrared absorption spectrum measured by an FT-IR, a height of an absorbance peak at wavenumbers of 850 to 1000 cm −1 is defined as Pa and a height of an absorbance peak at wavenumbers of 1000 to 1200 cm −1 is defined as Pb.

[Object] To provide a copper clad laminate that is capable of achieving high adhesion between a low dielectric resin film and a copper plating layer and a good volume resistivity while suppressing a transmission loss when being applied to a flexible circuit board, and a method for producing the copper clad laminate. [Solving Means] A copper clad laminate of the present invention includes a low dielectric resin film having a relative permittivity of 3.5 or lower and a dissipation factor of 0.008 or lower at a frequency of 10 GHz, and an electroless copper plating layer laminated on at least one surface of the low dielectric resin film. A weighted average size of crystallites in the electroless copper plating layer is 25 to 300 nm, and an adhesion strength between the resin film and the electroless copper plating layer is 4.2 N/cm or more.

An electrolytic foil and a battery current collector is provided in which the risk of breakage or tearing during manufacturing presented by reduced thickness can be restrained, and which possess sufficient strength for repeated charging and discharging in a secondary battery. The electrolytic foil and the battery current collector contain a Ni—Fe alloy layer, having a thickness of 1.5 to 10 μm and having a first surface and a second surface and wherein the value of a three-dimensional surface properties parameter Sv divided by the thickness is equal to or less than 0.5 for the first surface and the second surface.

The problem solved by the present invention is to provide a pinhole detection device with an improved accuracy of detecting pinholes. The detection unit of the pinhole detection device includes a plurality of optical fibers that transmit light that has passed through the object to be inspected. The plurality of optical fibers are arranged side by side while facing a light source. When a maximum detectable angle at which the pinhole with respect to an optical axis of the light source is detectable is defined as θ, a maximum angle of incidence of light that can be transmitted by the optical fiber with respect to the optical axis of the light source is set in a range of θ+0° to θ+5°.

[Object] The purpose of the present invention is to provide a layered composite that is high in both flexural modulus and moldability. [Solving Means] Provided is a layered composite including a carbon-fiber-reinforced resin in which a chopped strand prepreg obtained by impregnating fiber in resin is oriented in such a manner as to exhibit pseudo-isotropic properties, and a steel plate that is layered on at least one surface of the carbon-fiber-reinforced resin and has a tensile breakage elongation ϕ of equal to or more than 20%, the flexural modulus in a flat plate state obtained in compliance with ASTM D-790 being equal to or more than 30 GPa.

An electrolytic foil and a battery current collector is provided in which the risk of breakage or tearing during manufacturing presented by reduced thickness can be restrained, and which possess sufficient strength for repeated charging and discharging in a secondary battery. The electrolytic foil and the battery current collector contain a Ni—Fe alloy layer, having a thickness of 1.5 to 10 μm and having a first surface and a second surface and wherein the value of a three-dimensional surface properties parameter Sv divided by the thickness is equal to or less than 0.5 for the first surface and the second surface.