JP2008050648A - Method for producing metal pigment flake, and plating tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method capable of producing metal pigment flakes in a high yield, and to provide a plating tool. <P>SOLUTION: The metal pigment flakes are produced through: a stage where a disk (1) is coated with a release agent by being dipped into the release agent, and the surplus release agent is removed using a rotating means (3); a stage where the disk (1) is charged to a plating tank (not shown in figure), and the whole thereof is oscillated, so as to form a plating film; a stage where the disk (1) is discharged from the plating tank, and thereafter, the plating liquid is removed using the rotating means (3); and a stage where the obtained plating film is peeled. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for producing metal pigment flakes by an electroless plating method and a plating jig.

  Conventionally, metal pigment flakes used for paints and the like are obtained by pulverizing a film (metal foil) obtained by sputtering or electroless plating. For example, in Japanese Patent Laid-Open No. 2003-292823, a corrosion-resistant bright pigment is produced by a sputtering method. However, it is cheaper to produce by the electroless plating method than the sputtering method.

  JP-A-2005-314757, JP-A-2004-59952 and JP-A-8-35097 describe a method for producing a printed wiring board. However, a reel-to-reel method, an electroless plating method or A method of depositing a plating film on a film by an electrolytic plating method is described, and it is general to produce a plating film as described above using such a method.

  In the conventional method for producing metal pigment flakes by electroless plating, a release agent is applied to the film surface, a plating film is deposited on the film by electroless plating, and the release agent is dissolved by an organic solvent. Thus, a metal foil for metal pigment flakes is obtained.

  In order to increase the yield, it is necessary to increase the width of the film and ensure the required plating time, and then increase the conveyance speed or lengthen the conveyance length in the plating tank. Therefore, in the above-mentioned Japanese Patent Application Laid-Open No. 2005-314757 and Japanese Patent Application Laid-Open No. 8-35097, it is described that the film transported horizontally is transported in a zigzag manner in the plating tank to increase the transport length. Has been. Or the above-mentioned Unexamined-Japanese-Patent No. 2004-59952 describes reducing the installation area of a plating tank by conveying a film in the state extended vertically.

However, in order to transport such a wide film in a plating tank so as not to meander or sag, a very complicated device is required. However, there is a problem that a high yield cannot be obtained and it is difficult to reduce manufacturing costs.
JP 2003-292823 A JP 2005-314757 A JP 2004-59952 A JP-A-8-35097

  An object of the present invention is to provide a metal pigment flake production method and a plating jig capable of producing metal pigment flakes with high yield.

  The plating jig of the present invention has a plurality of substrates that are rotatable and arranged in parallel at equal intervals, and is used to obtain a plating film that is deposited on the substrates.

  Furthermore, it has a frame, one or more rotating shafts rotatably supported by the frame, and rotating means for rotating the rotating shaft, and the substrates are arranged in parallel to the rotating shaft at equal intervals. It is desirable to be fixed.

  Furthermore, it is desirable that the distance between the substrates is 5 mm or more.

  The metal pigment flake preparation method of the present invention uses the plating jig, applies the release agent to the substrate by immersing in the release agent, and removes the excess release agent using the rotating means. A step of forming a plating film by charging the plating tank and swinging the whole, a step of removing the plating solution using the rotating means after taking out from the plating tank, and And a step of peeling the plated film formed.

  By this invention, the inside of a plating tank can be used efficiently and it becomes possible to perform the process of mold release agent application | coating and mold release agent peeling simply. This makes it possible to produce metal pigment flakes with a high yield.

  Furthermore, since it is easy to use repeatedly, the manufacturing cost can be reduced.

  The plating jig of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the plating jig of the present invention.

  The plating jig of the present invention includes a frame (2), one or more rotating shafts (4) rotatably supported by the frame (2), and a rotating means (3) for rotating the rotating shaft (4). And a plurality of disks (1) fixed in parallel with the rotation axis (4) in parallel.

  The material of the disk (1) may be metal or resin, and is formed to have a uniform thickness and a smooth surface. When the material of the disk (1) is made of resin, it is not limited as long as it does not dissolve or peel off with respect to a solvent in a release agent described later or a plating solution. For example, an acrylic resin, a urethane resin, Polyester resin, polystyrene resin, or the like can be used.

  The shape of the disk (1) is not limited to a circle as long as it is a substrate having a flat surface, but a flat plate of any shape such as a quadrangle can be adopted. Shaped disks are preferred. Further, the disk has a uniform thickness, and may have a thickness that can withstand rotation and liquid flow without being deformed.

  A disk (1) is arranged and fixed at equal intervals on the rotating shaft (4), and consists of a rotatable shaft. In the illustrated example, there are two rotating shafts (4), but any number may be used. Further, the rotating means (3) for rotating the rotating shaft (4) may be a crank handle as shown, or a structure connectable to a drive system, for example, a structure connected via a gear mechanism or a chain. . The material may be the same as that of the disk (1).

  The structure of the means for arranging the disk (1) in a rotatable manner and in parallel at equal intervals is not limited to the rotating shaft (4) and the crank handle connected thereto. For example, the structure may be such that the shaft (4) is fixed, the disk (1) is rotatably arranged with respect to the shaft (4), and the disk (1) is rotated by an external driving means.

  The frame (2) preferably has a shape that facilitates charging and unloading into the electroless plating tank. The material of the frame (2) may be the same as that of the disk (1). The frame (2) is preferably connectable to each other so that a plurality of jigs can be arranged vertically and horizontally.

  When performing electroless plating, it is necessary to efficiently remove hydrogen generated during plating. Moreover, in order to perform electroless plating uniformly, it is necessary to stir the plating solution so as not to retain the plating solution between the disks (1). Furthermore, by swinging the whole in the vertical and horizontal directions, the plating solution between the disks (1) can be easily stirred, and the generated hydrogen can be removed efficiently. .

  The narrower the distance between the disks (1), the more efficiently the plating area can be obtained even in a narrow plating tank. However, if the distance between the disks (1) is less than 5 mm, the plating solution between the disks (1) will move sufficiently. It becomes impossible to deposit a uniform plating film.

  The method for producing the metal pigment flakes of the present invention will be described below.

  First, the above-mentioned plating jig is immersed in a release agent that can be easily dissolved by a solvent to be described later, and the release agent is applied to the surface of the disk (1). Thereafter, the disk (1) is rotated using the rotating means (3). Thereby, while being able to remove an excess mold release agent, a mold release agent can be apply | coated uniformly.

  Then, in a state where the disk (1) is vertically oriented, it is inserted into a plating tank and a plating film is formed by an electroless plating method. During electroless plating, the plating solution between the disks (1) moves by swinging the whole in the vertical direction and the horizontal direction, and a plating film can be deposited uniformly. Further, since the disk (1) is oriented in the vertical direction, the generated hydrogen can be easily discharged upward by rocking the whole as described above.

  After removing from the plating tank, the disk (1) is rotated using the rotating means (3). Thereby, since excess plating solution can be removed and collected, there is no loss of chemical solution due to carry-out.

  Thereafter, a metal jig flake is obtained by immersing the plating jig in a tank filled with a solvent to dissolve the release agent. Finally, the plating jig is repeatedly used by performing simple cleaning.

  The plating film to be deposited may be any metal and alloy as long as it is a metal and alloy deposited by electroless plating, but a method for producing metal pigment flakes made of Ni will be described.

  A perspective view of the plating jig of this example is shown in FIG.

  The plating jig of the present embodiment includes a frame (2), two rotating shafts (4) rotatably supported by the frame (2), and a rotating means (3) for rotating the rotating shaft (4). And a disk (1) fixed in parallel with the rotating shaft (4) in parallel. The disc (1) was made of a polyester resin having a diameter of 15 cm, and 20 discs (1) were attached to one rotating shaft (4) at intervals of 5 mm.

  First, a urethane resin was dissolved in a solvent of butyl acetate 40%, xylene 40%, and cyclohexanone 20% to obtain a release agent. The plating jig was immersed in a tank filled with the release agent and taken out. Thereafter, the rotating means (3) was used to dry the disk (1) while rotating, thereby removing excess release agent and applying it uniformly.

  Further, after passing a conditioner (for example, Melplate Conditioner 1101 manufactured by Meltex Co., Ltd.) used for normal electroless plating, a catalyst (for example, Melplate Activator 444 manufactured by Meltex Co.) and an accelerator ( For example, a plating nucleus was imparted using Melplate PA-360 manufactured by Meltex.

  Thereafter, in a state in which the disk (1) is vertically oriented, the disc (1) is charged into a plating tank filled with an electroless Ni plating solution (manufactured by Meltex Co., Ltd., NI-871). A plating film made of a P alloy was formed. During electroless plating, a circular motion was applied about once every 15 seconds, and the whole was swung vertically and horizontally.

  After removing from the plating tank, the rotating means (3) was used to rotate the disk (1) to remove excess plating solution. As a result, it was possible to produce a uniform plating film up to the center on all the disks (1).

  Thereafter, the plating jig is immersed in a tank filled with a solution of methyl ethyl ketone, and 100 W of ultrasonic waves is applied by an ultrasonic cleaning device (HONDA, ULTRASONIC CLEANER W-212) to dissolve the release agent, Metal pigment flakes were obtained by grinding the film.

  Finally, washing was repeated with a solution of methyl ethyl ketone and used.

It is a perspective view which shows one Example of the plating jig | tool of this invention.

Explanation of symbols

1 disk 2 frame 3 rotating means 4 rotating shaft

Claims (4)

  A plating jig that has a plurality of substrates that can be rotated and arranged in parallel at equal intervals, and is used to obtain a plating film that is deposited on the substrates.   A frame; one or more rotation shafts rotatably supported by the frame; and rotation means for rotating the rotation shafts, wherein the substrate is arranged in parallel with the rotation shaft at an equal interval and fixed The plating jig according to claim 1, wherein:   The plating jig according to claim 2, wherein an interval between the substrates is 5 mm or more.   Using the plating jig according to any one of claims 1 to 3, the mold release agent is applied to the substrate by immersing in a mold release agent, and the excess release agent is removed using the rotating means. A step of forming a plating film by charging the plating tank and swinging the whole, a step of removing the plating solution using the rotating means after taking out from the plating tank, and A method for producing a metal pigment flake, comprising a step of peeling the plated film formed.

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