Furukawa-Sky Aluminum Corporation

Masatsugu Saito

Osamu Kato

Toshiki Maezono

Takehiro Ozawa

A pre-coated metal sheet for slot-in drive cases which has a metal sheet; chemical conversion coatings formed on both sides of the metal sheet; and a coating film formed on one of the chemical conversion coatings and containing at least one base resin selected from a polyester-series resin, an epoxy-series resin and an acrylic-series resin, at least one resin beads selected from nylon-series resin beads, fluorine-series resin beads and urethane-series resin beads, and at least one lubricant aselected from carnauba wax, polyethylene wax and microcrystalline wax. The coating film has a surface having an arithmetical mean deviation of the assessed profile Ra of 0.3 to 4.5 &#x3bc;m and a mean width of the profile elements, RSm, of 105 to 280 &#x3bc;m, and the ratio of mean particle diameter of the resin beads to coating film layer thickness of the coating film is in the range of 2.0 to 3.0.

Pre-coated metal sheet for slot-in drive cases

A resin-coated aluminum alloy sheet material for an aluminum electrolytic capacitor case includes a resin layer that contains wax composed of at least one of polyethylene wax and carnauba wax, and has a thickness falling within a range from at least 2 &#x3bc;m to at most 22 &#x3bc;m. A total of lengths of wax particles, defined when the wax particles are cut along a straight line of 100 &#x3bc;m optionally drawn on the surface of the resin layer, is at least 10 &#x3bc;m. A number of the wax particles, featured by a cross-sectional shape having a size of at most 80% of the thickness of the resin layer and of at least 0.1 &#x3bc;m, is from at least 3 to at most 50. A number of the wax particles, featured by a cross-sectional shape featured by a major axis extent having a size of more than 80% of the thickness of the resin layer is less than 10.

Resin-coated aluminum alloy sheet material for aluminum electrolytic capacitor case, case for aluminum electrolytic capacitor, and aluminum electrolytic capacitor

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Tokyo, Japan

Masatsugu Saito