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Pre-coated metal sheet for slot-in drive cases

A drive box, metal sheet technology, applied in the direction of instruments, record carrier structural parts, data recording, etc., can solve the problems of unavoidable material cost, inconsistent sliding performance, difficult to roll up, etc., to achieve improved sliding performance, scratch resistance Improved wiping performance and small contact area

Inactive Publication Date: 2010-01-27
FURUKAWA SKY ALUMINUM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since such a coating contains a large amount of fluororesin powder, there are problems in that not only an increase in material cost is unavoidable, but also it is difficult to wind up a product sheet when it is coiled up.
Therefore, it is impossible to obtain any sufficient penetration into the base resin, which tends to cause locally non-uniform dispersion, so that the sliding properties are inconsistent

Method used

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  • Pre-coated metal sheet for slot-in drive cases
  • Pre-coated metal sheet for slot-in drive cases
  • Pre-coated metal sheet for slot-in drive cases

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-9

[0126] Aluminum alloy sheets are each used as the metal sheet. Each aluminum alloy sheet (material: TIS A5052, sheet thickness: 0.6 mm) was subjected to decontamination treatment on both sides thereof with a purchased aluminum decontamination agent, followed by washing with water. Thereafter, the treated sheet was subjected to a chemical conversion treatment on both sides thereof using a commercially available chroming phosphating treatment solution. Next, each chemical conversion treated surface B was coated with the coating material b (shown in Table 1) by means of a bar coater, followed by baking. At the same time, other chemical conversion treatment surfaces A were coated with a base coat material composed of polyester series resin, followed by baking, and the bake controlled the thickness of the formed base coat to be 10 μm (after baking). Then, on the formed bottom layer, the coating material a (shown in Table 1) comprising base resin, resin beads, and lubricant was coa...

Embodiment 1-8

[0127] The samples of Comparative Examples 1-8 were prepared in the same manner as used in Examples 1-9, but under the preparation conditions shown in Table 2.

[0128]

[0129]

Embodiment 14-15

[0131] In Example 14, a stainless steel sheet was used as the metal sheet. In Example 15, a zinc-coated metal sheet was used as the metal sheet. These sheets were chemically converted on both sides with a commercially available chromizing solution. Next, each of the chemical conversion treated surfaces B is coated with a heat-dissipating and conductive resin coating material (composed of polyester series resin, graphite and nickel filler) by means of a bar coater to obtain a coating film thickness 1 μm (after baking), followed by baking. In this coating material, the contents of graphite and nickel fillers were 30 wt% and 40 wt% (based on the amount of resin solids), respectively.

[0132] Simultaneously, each of other chemical conversion treatment surfaces A is coated with an undercoat material composed of polyester series resins, and then baked. The thickness of the undercoat layer formed by this baking control is 10 μm (after baking ). Then, on each formed bottom layer,...

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PUM

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Abstract

Disclosed is 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 a3 selected 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 m and a mean width of the profile elements, RSm, of 150 to 280 m, and the ratio of the mean particle diameter of the resin beads to the coating film layer thickness of the coating film is in the range of 2.0 to 3.0.

Description

technical field [0001] The present invention relates to pre-coated sheet metal for slot-in drive cases housing electrical and electronic equipment such as LCD televisions, personal computers, and DVD players. In the present invention, the term "precoat" is used to mean "coating before die casting". Background technique [0002] In recent years, developments in accommodating electrical and electronic equipment and developments in optical discs such as CDs and DVDs (Digital Video Discs) have advanced in stride. Slot drive enclosures have become popular because they allow more space-saving drive enclosures. Such a slot system is a system that has the following functions: when a disc is exposed and leaked, the disc can automatically enter the drive box as long as the disc is placed in the slot; and the disc can enter and exit more smoothly than the traditional tray system slot. More recently, in such slot drive enclosures, prepainted sheet metal is used. For example, a pre-c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B33/02G11B17/05B32B15/08
Inventor 小泽武广齐藤正次
Owner FURUKAWA SKY ALUMINUM CORP