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Resin-coated aluminum plate, and outer container for electronic components

A technology of resin and aluminum plate, which is applied in the direction of capacitor parts, capacitor case/packaging, synthetic resin layered products, etc., which can solve the problems of poor elongation, non-elongation of the film, intolerance to use, etc., and achieve improved alcohol resistance , Short semi-crystallization time and easy crystallization

Inactive Publication Date: 2014-08-20
MITSUBISHI PLASTICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aromatic polyamide with the above composition has high heat yellowing resistance, but the elongation of the film is inferior to that of nylon 6.
Therefore, a resin-coated aluminum plate formed by laminating films composed only of aromatic polyamides has disadvantages that the film does not elongate and whitens during drawing or after drawing, or the film is easily peeled off from the aluminum plate.
In addition, the above-mentioned aromatic polyamide has excellent chemical resistance to non-polar reagents such as gasoline and oil compared with ordinary resins, but when the crystallinity is low, the polarity is high, so there is a problem of whitening when it comes into contact with alcohol or the like. question
Therefore, when printing on the outer surface of a packaging container composed of a resin-coated aluminum sheet laminated with a film composed only of aromatic polyamides, there is a problem that it will be whitened by ethanol during the degreasing process and cannot be used.

Method used

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  • Resin-coated aluminum plate, and outer container for electronic components
  • Resin-coated aluminum plate, and outer container for electronic components
  • Resin-coated aluminum plate, and outer container for electronic components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3、 comparative example 1

[0178] The resin pellets obtained by mixing the polyamide resin layer ratios shown in Tables 1 and 2 were extruded using an extrusion molding machine equipped with a T-die to produce a polyamide resin film with a thickness of 20 μm. A resin-coated aluminum plate was obtained by instantaneously heating and pressing the obtained polyamide-based resin film on a heated non-porous anodized aluminum plate at 260° C. with a pair of pressure rolls to integrally laminate it.

[0179] Tables 1 and 2 show the evaluation results of the polyamide-based resin film and the resin-coated aluminum plate.

Embodiment 4～11

[0180] [Examples 4-11, Comparative Examples 2-5, 7]

[0181] Two-layer co-extrusion was carried out using an extrusion molding machine equipped with a T-die using the resin pellets obtained by mixing the polyamide-based resin layer ratios shown in Tables 1 and 2 and the above-mentioned nylon 6-layer resin pellets. Molding was performed to produce a laminated film of a polyamide-based resin film with a thickness of 20 μm and a nylon 6 film with a thickness of 2 μm.

[0182]This laminated film was integrally laminated with a non-porous anodized aluminum plate in the same manner as in Example 1 to obtain a resin-coated aluminum plate.

[0183] Tables 1 and 2 show the evaluation results of the above laminated film (evaluation of the nylon 6 film side) and the resin-coated aluminum plate.

reference example 1

[0187] A resin-coated aluminum plate was produced in the same manner as in Example 5 except that the thickness of the nylon 6 film was 5 μm, and the evaluation results are shown in Table 2.

[0188] It should be noted that the DSC measurement charts of the polyamide-based resin films of Examples 1, 2, 8 and Comparative Example 1 in the above are shown in Figure 4 , the half-crystallization time determination plot is shown in Figure 5 .

[0189] Table 1

[0190]

[0191] Table 2

[0192]

[0193] It can be seen from Tables 1 and 2 that the surface of the aluminum plate is subjected to non-porous anodic oxidation treatment, and a specified amount of crystallization accelerator is added to the polyamide resin layer to make the crystallization initiation temperature range from 177 to 200°C, so that the semi-crystalline If the time is 2 minutes or less, a resin-coated aluminum plate can be obtained that does not have the problem of deterioration in appearance quality due...

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Abstract

Provided is a resin-coated aluminum plate, which does not undergo the deterioration of appearance quality which may be caused by the crystallization of a coating resin during storage, and in which the adhesion between an aluminum plate and a resin layer is high and the resin layer has excellent alcohol resistance. An resin-coated aluminum plate produced by coating an anodically oxidized surface of an aluminum plate that has been subjected to an non-porous anodic oxidation treatment with a polyamide resin layer, wherein the polyamide resin layer comprises 100 parts by mass of a resin component and 0.01 to 10 part by mass of a crystallization-accelerating agent, the resin component comprises a mixed resin comprising 50 to 80 parts by mass of an aromatic polyamide (A) containing 90 mol% or more of a structural unit produced by the polycondensation reaction of metaxylylene diamine with adipic acid and 50 to 20 parts by mass of nylon-6 (B) (wherein the sum total of the components (A) and (B) is 100 parts by mass), the crystallization start temperature of the polyamide resin layer is 177 to 200 DEG C as measured by a DSC measurement in which the polyamide resin layer is heated and melted and then the melted product is cooled at a cooling rate of 10 DEG C / min, and the semi-crystallization time of the polyamide resin layer is 2 minutes or shorter as measured by a 120 DEG C isothermal crystallization test.

Description

technical field [0001] The present invention relates to a resin-coated aluminum plate and a packaging container for electronic components. Specifically, it relates to a resin-coated aluminum plate suitable for packaging containers of electrolytic capacitors and chip-type aluminum electrolytic capacitors, and a packaging container for electronic components made of the resin-coated aluminum plate. Background technique [0002] Conventionally, as a packaging container for accommodating electronic components such as capacitor elements constituting an aluminum electrolytic capacitor, a bottomed cylindrical container obtained by drawing an aluminum plate is generally used. The outer peripheral surface of this bottomed cylindrical container is covered with a film of vinyl chloride-based resin, olefin-based resin, or the like for the purpose of electrical insulation and displaying the contents. [0003] In recent years, the miniaturization of electronic components has been pursued,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/088B32B27/34H01G9/08
CPCB32B27/34H01G9/08B32B15/088B05D2202/25C09D177/02C09D177/06C08K5/0083C08K3/34
Inventor 田岛久生西原俊一鲇田光弘
Owner MITSUBISHI PLASTICS INC
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