Method and apparatus for releasing metal-resin joint

A joint, metal technology, applied in the direction of solid waste removal, household components, applications, etc., can solve the problems of unsuitable composite materials, metal-resin joints, object damage, etc.

Inactive Publication Date: 2005-08-10
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is effective when the resinous part of the composite is a phenolic resin that is easily swellable in alkaline liquids, but not suitable for other composites
[0012] As described above, the conventional metal-resin junction peeling method has various disadvantages, and is usually accompanied by destruction of the object having the metal-resin junction.

Method used

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  • Method and apparatus for releasing metal-resin joint
  • Method and apparatus for releasing metal-resin joint
  • Method and apparatus for releasing metal-resin joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] (i) Fabrication of Sample 1

[0076] A steel plate having a thickness of 0.10 mm, a length of 50 mm, and a width of 30 mm was prepared. On one side of the steel plate, an adhesive (quick-drying adhesive G17 manufactured by Konishi Co., Ltd.) made of synthetic rubber dissolved in a solvent is coated, and a 50 mm long, 30 mm wide, and 2 mm thick steel sheet is placed on it. An acrylic sheet made of polymethyl methacrylate so that it is superimposed on the steel sheet. In this way, five similar samples 1a, 1b...1e having junctions of the steel plate and the acrylic plate were prepared.

[0077] (ii) Assembly of the stripping device

[0078] First, five 100-ml beakers made of tetrafluoroethylene were prepared, and 100 ml of 0.01M, 0.1M, 3M, 7M, and 15M aqueous sodium hydroxide solutions (25° C.) were filled therein. These beakers are referred to as 2a, 2b, 2c, 2d and 2e, respectively. A nickel plate (50 mm in length, 30 mm in width, and 0.5 mm in thickness) as a counter...

Embodiment 2

[0091] Then, four sets of devices identical to those of the test device of sample 1d were fabricated. Then, at room temperature, the value of the electric current passed between the sample and the counter electrode was changed, and the change in the time required for peeling was checked. The results are shown in Table 2 together with the potential of the metal part of the sample with respect to the standard hydrogen electrode.

[0092]

Current value (mA)

metal part relative to the standard hydrogen

Electrode Potential (V)

Time until confirmation of detachment

(h)

1

-1.10

6

10

-1.23

4

100

-1.37

3.5

500

-1.61

3.5

800

-1.81

3.5

1000

-1.94

3.5

[0093] At a current value of 1 mA, although generat...

Embodiment 3

[0096] Five sets of devices identical to the test device of sample 1d were produced. Then, the beakers were immersed in hot water baths of various temperatures, and the peeling test of the metal-resin junction of the samples was performed in aqueous sodium hydroxide solutions of various temperatures. The current value passed between the metal portion of the metal-resin junction and the counter electrode was 10 mA.

[0097] For the three samples, the temperature of the hot water bath was set to 25°C, 45°C, and 65°C, respectively, and the same peeling test as in Example 1 was performed.

[0098] For one sample, the beaker was immersed in an ultrasonic cleaner (40 kHz, output 200 W) filled with 25° C. water, and the same peeling test as in Example 1 was performed.

[0099] The remaining one sample was processed as follows. Its floor plan is shown in Figure 4 . also, Figure 4 The I-I line section diagram in Figure 5 .

[0100] First, an ear portion 402 also made of a ste...

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Abstract

A method for separating a metal-resin joint including the steps of: (1) immersing an article including a metal-resin joint with a counter electrode in an alkaline solution; and (2) applying a voltage over a certain time period between the metal portion of the joint and the counter electrode such that the potential of the metal portion is lower than that of a standard hydrogen electrode.

Description

technical field [0001] The present invention relates to a method and an apparatus for peeling off the resin portion from the metal portion of the metal and resin joint without physically damaging the object having the joint. Background technique [0002] With the progress of technological development in recent years, the requirements for materials in terms of strength, function, safety, and cost have become more stringent and more complex. Since there are limitations in meeting such requirements with a single material, opportunities for composite materials consisting of two or more materials are increasing. Among them, a composite material having a junction between metal and resin is often used. Such bonding materials include, for example, electric wires in which metal wires are covered with a resin film, substrates for electronic devices in which metals and resins are integrated, and parts for automobiles and aircrafts in which metals and metals or metals and resins are bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/02B29B17/04C08J11/06C25F1/00C25F1/02C25F5/00
CPCY10T156/1158B29K2705/10B29B2017/0293B29K2705/06C25F1/00B29K2033/12B29L2031/3425B29K2705/04Y10T156/19B29K2021/00B29K2705/08B29B17/02B29K2075/00B29B2017/0296B29L2009/003B29K2705/12C25F5/00Y10T29/49755Y10T29/53274B29L2009/005B29K2069/00B29L2031/707B29B2017/0436B29B17/04B29K2077/00B29K2027/06B29K2705/00B29K2705/02Y02W30/62
Inventor 南野哲郎和泉阳一
Owner PANASONIC CORP
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