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Open-and-close device made of aluminium alloy plate for recording medium shell

A technology of aluminum alloy plate and recording medium, applied in the field of shutters

Inactive Publication Date: 2002-12-25
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, even though these prior arts of the present applicant have properties such as light weight and rigidity required as an aluminum alloy plate for a switch, it cannot be said that they fully satisfy the flaw resistance, punching workability and All characteristics of processability such as bending workability, solvent resistance, and printability of UV-curable inks are expected to be further improved.

Method used

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  • Open-and-close device made of aluminium alloy plate for recording medium shell
  • Open-and-close device made of aluminium alloy plate for recording medium shell
  • Open-and-close device made of aluminium alloy plate for recording medium shell

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Embodiment Construction

[0012] The present invention will be described in detail below. The aluminum alloy plate used for the shutter of the recording medium casing of the present invention has a chromate film formed on the surface as the first layer, and a synthetic resin film is formed on the chromate film as the second layer, wherein, The surface is composed of an aluminum alloy substrate and at least the outer surface of the shutter of the recording medium case of the aluminum alloy substrate.

[0013] First, set it as the first layer on the surface of the aluminum alloy substrate to convert it into a chromium adhesion amount of 5 to 50 mg / m 2 The chromate coating is provided as the second layer with a synthetic resin coating of the following composition. The synthetic resin film has an acrylate-modified polyester urethane-based resin, and contains 5 to 20 parts by weight of inorganic fine particles having an average particle diameter of 10 μm or less relative to 100 parts by weight of the acrylate-m...

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Abstract

The present invention provides a shutter using a recording medium case of an aluminum alloy plate satisfying all the characteristics required for the shutter. The switch is composed of: an aluminum alloy substrate containing Mg: 2.2 to 2.8% by mass, Mn: 0.35 to 0.55% by mass, and Fe: 0.1 to 0.4% by mass; A chromate film provided as a first layer on the surface of the outer side of the shutter of the above-mentioned recording medium case, the above-mentioned chromate film is provided so that the amount of chromium deposited is 5 to 50 mg / m2 in conversion; A film made of acrylate-modified polyester urethane resin is provided as the second layer on the outer surface of the device, and the film thickness of the film made of acrylate-modified polyester urethane resin is 0.5 to 3 μm. Inorganic microparticles having an average particle diameter of 10 μm or less are contained in an amount of 5 to 20 parts by weight relative to 100 parts by weight of the above-mentioned acrylate-modified polyester-urethane resin, so as to be 100 parts by weight of the above-mentioned acrylate-modified polyester-urethane resin. The oxidized polyethylene-based lubricant is contained in a proportion of 0.5 to 3 parts by weight.

Description

Technical field [0001] The present invention relates to a shutter provided on a housing that accommodates recording media such as floppy disks and other magnetic disks, MO disks, and compact disks and other optical disks. In particular, it relates to a shutter using an aluminum alloy plate that fully satisfies the characteristics of lightness, rigidity, defect resistance, punching processability, bending processability, solvent solubility and UV curable ink printing properties. Background technique [0002] In floppy disks (floppy disks) and other optical disks, MO disks, small disks and other optical disks, as shown in the example of the floppy disk in Fig. 1, a magnetic disk or optical disk (disk for recording) on ​​which information is recorded is contained in a housing 2 made of synthetic resin. Wait for the recording medium 3. In addition, when writing or reading information, a magnetic head or an optical head is brought close to the recording medium 3 in the casing 2 to rea...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C21/06
Inventor 神谷宪一福井正信
Owner KOBE STEEL LTD
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