Aluminium/resin composite exhibiting excellent weather resistance and manufacturing method for the same

Abstract

Disclosed is an aluminium / resin composite which: exhibits extremely high interfacial adhesion strength and air tightness between an integrally-bonded, shaped aluminium article made from an aluminium alloy, and a molded resin article; retains the excellent adhesion strength and air tightness of the aluminium / resin bond surface in harsh environments such as those caused by temperature, humidity, dust, and corrosive materials; and is corrosion resistant, heat resistant, weather resistant, durable, and exhibits excellent peel strength on the aluminium / resin interfacial surface. Also disclosed is a manufacturing method for the aluminium / resin composite. The aluminium / resin composite contains a shaped aluminium article having undulations on the surface, and a molded resin article which is bonded to the shaped aluminium article when the resin is butted thereto. A plurality of concave sections are formed due to the undulations, and an aluminium coating film is formed on the outermost surface of the undulations. Fitting sections are formed on the molded resin article where the resin enters the concave sections and hardens. The components of the aluminium / resin composite which exhibits excellent weather resistance are engaged by the concave sections and the fitting sections.

Description

technical field

[0001] The present invention relates to an aluminum-resin composite having an aluminum molded body made of an aluminum alloy and a resin molded body integrally provided on the surface of the aluminum molded body, and a method for producing the composite, which not only has excellent adhesion strength and airtightness at the aluminum-resin bonding surface , and corrosion resistance and weather resistance, and the tensile strength of the aluminum-resin bonded surface is also excellent, and can be used (but not limited to) for various sensor components for automobiles, various switch components for household appliances, various industrial A wide range of fields represented by capacitor parts of equipment, etc. Background technique

[0002] In the fields of various sensor parts for automobiles, various switch parts for household appliances, capacitor parts for various industrial equipment, etc., especially in the fields of automotive parts, etc., there are often ...

Examples

Embodiment 1

[0083] [Preparation of Aluminum Formed Body]

[0084] From the aluminum alloy (JISA 1050-H24) plate with a thickness of 1mm, 3 aluminum flakes (aluminum alloy material) with a size of 50mm × 50mm are cut out, and these aluminum flakes are subjected to pretreatment, that is: at first in 30% by weight nitric acid aqueous solution in After 5 minutes of immersion at room temperature, it was fully washed with ion-exchanged water, then immersed in 5% by weight sodium hydroxide solution at 50°C for 1 minute, then washed with water, and then immersed in 30% by weight of nitric acid aqueous solution at room temperature for 3 minutes, and washed with water.

[0085] Next, the above-mentioned pretreated aluminum sheet is subjected to etching treatment, that is, adding 54 g / L of aluminum chloride hexahydrate (AlCl 3 ·6H 2 O) As a water-soluble inorganic halide, it is prepared into an etching solution (chloride ion concentration: 48 g / L), immersed in the etching solution at 66° C. for 4 m...

Embodiment 2～5

[0118] In addition to using the treatment liquid shown in the following Table 1, the aluminum test piece (aluminum molded body) and the test body were used as a circular forging die under the treatment conditions shown in the following Table 1 instead of the 80°C, 20-minute heating in Example 1. The water and treatment of water immersion were used as the aluminum film formation treatment, and the test samples for evaluation (aluminum-adhesive-aluminum test piece, aluminum-resin-aluminum test piece, and aluminum-resin test piece) were produced in the same manner as in Example 1. , In addition, in the same manner as in Example 1 above, a weather resistance test (salt spray test), a pull-off adhesion measurement test, and a resin-aluminum-resin lamination portion observation and evaluation were implemented.

[0119] The results are shown in Table 2 together with the results of Example 1.

[0120] [Table 1]

[0121]

[0122] (Note) Silane coupling agent: β-(3,4-epoxycyclohexyl...

Embodiment 6

[0125] Except having used JIS A5052-H34 as the aluminum alloy plate for producing the aluminum sheet, in the same manner as in the above-mentioned Example 1, a circular dolly was produced simultaneously with the production of the aluminum test piece (aluminum molded body). Next, test samples for evaluation (aluminum-adhesive-aluminum test piece, aluminum-resin-aluminum test piece, and aluminum-resin test piece) were produced in the same manner as in Example 1 above. In addition, as in Example 1, A weather resistance test (salt spray test), a pull-off adhesion measurement test, and an observation evaluation of a laminated portion of resin-aluminum-resin were implemented.

[0126] The results are shown in Table 2 together with the results of Example 1.

technical field

[0001] The present invention relates to an aluminum-resin composite having an aluminum molded body made of an aluminum alloy and a resin molded body integrally provided on the surface of the aluminum molded body, and a method for producing the composite, which not only has excellent adhesion strength and airtightness at the aluminum-resin bonding surface , and corrosion resistance and weather resistance, and the tensile strength of the aluminum-resin bonded surface is also excellent, and can be used (but not limited to) for various sensor components for automobiles, various switch components for household appliances, various industrial A wide range of fields represented by capacitor parts of equipment, etc. Background technique

[0002] In the fields of various sensor parts for automobiles, various switch parts for household appliances, capacitor parts for various industrial equipment, etc., especially in the fields of automotive parts, etc., there are often ...

Examples

Embodiment 1

[0083] [Preparation of Aluminum Formed Body]

[0084] From the aluminum alloy (JISA 1050-H24) plate with a thickness of 1mm, 3 aluminum flakes (aluminum alloy material) with a size of 50mm × 50mm are cut out, and these aluminum flakes are subjected to pretreatment, that is: at first in 30% by weight nitric acid aqueous solution in After 5 minutes of immersion at room temperature, it was fully washed with ion-exchanged water, then immersed in 5% by weight sodium hydroxide solution at 50°C for 1 minute, then washed with water, and then immersed in 30% by weight of nitric acid aqueous solution at room temperature for 3 minutes, and washed with water.

[0085] Next, the above-mentioned pretreated aluminum sheet is subjected to etching treatment, that is, adding 54 g / L of aluminum chloride hexahydrate (AlCl 3 ·6H 2 O) As a water-soluble inorganic halide, it is prepared into an etching solution (chloride ion concentration: 48 g / L), immersed in the etching solution at 66° C. for 4 m...

Embodiment 2～5

[0118] In addition to using the treatment liquid shown in the following Table 1, the aluminum test piece (aluminum molded body) and the test body were used as a circular forging die under the treatment conditions shown in the following Table 1 instead of the 80°C, 20-minute heating in Example 1. The water and treatment of water immersion were used as the aluminum film formation treatment, and the test samples for evaluation (aluminum-adhesive-aluminum test piece, aluminum-resin-aluminum test piece, and aluminum-resin test piece) were produced in the same manner as in Example 1. , In addition, in the same manner as in Example 1 above, a weather resistance test (salt spray test), a pull-off adhesion measurement test, and a resin-aluminum-resin lamination portion observation and evaluation were implemented.

[0119] The results are shown in Table 2 together with the results of Example 1.

[0120] [Table 1]

[0121]

[0122] (Note) Silane coupling agent: β-(3,4-epoxycyclohexyl...

Embodiment 6

[0125] Except having used JIS A5052-H34 as the aluminum alloy plate for producing the aluminum sheet, in the same manner as in the above-mentioned Example 1, a circular dolly was produced simultaneously with the production of the aluminum test piece (aluminum molded body). Next, test samples for evaluation (aluminum-adhesive-aluminum test piece, aluminum-resin-aluminum test piece, and aluminum-resin test piece) were produced in the same manner as in Example 1 above. In addition, as in Example 1, A weather resistance test (salt spray test), a pull-off adhesion measurement test, and an observation evaluation of a laminated portion of resin-aluminum-resin were implemented.

[0126] The results are shown in Table 2 together with the results of Example 1.

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