JPS60251268A - Manufacture of plastic molded article having metallic luster - Google Patents

Abstract

PURPOSE:To obtain a plastic molded article which has metallic luster and is enriched in design characteristics by forming a semitransparent thin film having specified thickness on the surface of colored plastic article. CONSTITUTION:First, after molding a base body made of plastics such as ABS resin, the surface is painted to color it or a colored plastic base body is molded by means of addition of colorants. Then, a semitransparent thin film consisting of metals or plastics having 50-100Angstrom thickness is formed on at least one part of the colored surface of the base body with a physical vapor depositing means such as sputtering and vacuum deposition. The thin film is generally composed of metals and Ag, Al (alloys) and Ni-Cr alloys or the like are used as the metals using for the above-mentioned physical vapor deposition means. By this method, not only the metallic luster but also the design wherein the color of the above-mentioned base body is seen through it can be given on the plastic molded articles.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention can be used for manufacturing plastic molded bodies with metallic luster [Prior Art] Recently, when giving metallic luster to plastic molded bodies, As an alternative to plating, a method has been developed in which a thin metal film of 500 to 1000 angstroms in thickness is formed on the surface of a plastic substrate by physical vapor deposition. With this method, a plastic molded article with metallic luster can be produced. However, the design was not necessarily satisfactory.

[Object of the Invention] The present invention has been completed in view of the above-mentioned circumstances. Therefore, an object of the present invention is to provide a manufacturing method capable of manufacturing a plastic molded article having metallic luster and rich in design.

[Structure 1-3 of the Invention] The manufacturing method according to the present invention includes a first step of forming a colored plastic substrate having a certain shape, and a physical vapor deposition method on at least a portion of the surface of the plastic substrate. a second step of forming a semitransparent thin film made of metal or ceramics with a thickness of 50 to 100 angstroms, and the coloring of the plastic substrate can be seen through the semitransparent thin film. That is.

Specifically, the plastic molded articles manufactured by the manufacturing method according to the present invention include emblems for automobile interiors.

In the first step, a colored plastic substrate having a certain shape is formed. The plastic base means a member that is the main component of a plastic molded body.

The shape of the plastic substrate varies depending on the use, type, etc. of the plastic molded body.

Formation of the plastic substrate in the first step can be performed by a conventional method. For example, the plastic substrate may be colored by forming a plastic substrate and then painting a part or the entire surface of the plastic substrate to form a coating film. The coating film can be formed by conventionally used methods such as spray coating, tJ coating, and dipping. In the second step, the plastic itself may be colored by adding a coloring agent such as a dye or pigment to the plastic, and then the plastic substrate may be molded into a predetermined shape.

The plastic substrate may be colored with a single color or with a plurality of colors in a pattern.

The surface of the plastic base has characters, figures, symbols,
A pattern can also be formed. The material constituting the plastic base is a commonly used resin, such as A.
BS resin, polymethyl methacrylate, polystyrene, hard polyvinyl chloride, polycarbonate, etc. can be used. These resins can be processed by injection molding, vacuum molding, press molding,
The plastic substrate of the present invention is formed into a certain shape by transfer molding or the like.

-5- In the second step, a thin film made of metal or ceramics having a thickness of 50 to 100 angstroms is applied to at least a portion of the colored surface of the plastic substrate formed in the first step by physical vapor deposition. form. The thickness of the thin film was measured by the step method using a surface roughness meter. Specifically, in this step measurement method, since the rate of film formation is constant, the layer is thickened so that there are formed areas and non-formed areas, and the step difference is measured to determine the film thickness. After that, the formation time was controlled. The physical vapor deposition means used in the second step vaporizes a substance such as a metal by a method such as sputtering, vacuum evaporation, or ion plating, and deposits the vaporized substance on the substrate. Sputtering is a process in which a high voltage is applied between two electrodes in a reduced pressure atmosphere to cause a glow discharge, and a high-speed gas such as argon is collided with the two electrodes to scatter substances such as metals. Vacuum deposition utilizes the vaporization of a substance such as a metal heated to a high temperature under a high vacuum. Ion blating, like vacuum evaporation, is a type of evaporation in which a vaporized substance, such as a metal, is activated by plasma to increase its reactivity with atmospheric gas.

As the device used in the second step according to the present invention, a normal vacuum evaporation device, sputtering device, or ion blating device can be used.

The translucent thin film formed in the second step has a thickness of 50 to 1
It is extremely thin at 0.00 angstroms. Therefore, the structure of the thin film is presumed to be a so-called island-like structure with gaps. Therefore, the coloring of the plastic substrate becomes visible through the translucent thin film. In the second step, a successive member may be provided at a predetermined interval in front of the plastic base, and the thin film may be formed by physical vapor deposition while moving the shielding member.

A thin plate can be used as the continuous striking member. The shielding member may have a flat plate shape or a curved plate shape.

It is preferable that the above-mentioned continuous hitting member moves continuously. By continuously moving the firing member in this manner, the thickness of the translucent thin film can be continuously varied in a tapered manner from 50 to 600 angstroms. In this case, in a thick region of about 600 angstroms, only the metallic luster is visible, and in a thin region of about 50 to 100 angstroms, the metallic luster is visible and the coloring of the plastic substrate is visible. still,
The continuous striking member may be moved intermittently as necessary.

In addition, a repeating member of a constant shape is provided at a predetermined interval in front of the plastic base, and the shielding member allows
It is also possible to form a thin film having two types of thickness, such as a thickness of about 0.00 angstroms and a thickness of about 600 angstroms. In this case, the shape of the continuous striking member may be a lattice-like or net-like shape. When a lattice-shaped continuous hitting member is used, the portion of the plastic base corresponding to the lattice has a thickness of about 50 to 100 angstroms,
The portion of the plastic base corresponding to the space between the grids has a thickness of about 600 angstroms. In this case, in a thick part of about 600 angstroms,
Only the metallic luster is visible, and in the thin part of about 50 to 100 angstroms, the metallic luster is visible and the coloring of the plastic substrate is visible. Translucent thin films are typically formed from metal. Therefore, the materials used for sputtering, vacuum deposition, and ion blating are generally metals. As the metal, nickel-chromium alloy, aluminum, aluminum alloy, iron-chromium alloy, silver, chromium, etc. can be used.

[Effects of the Invention] In the plastic molded article manufactured by the manufacturing method according to the present invention, a translucent M film with a thickness of 50 to 100 angstroms is formed on the surface of the plastic base colored in a predetermined color. . Therefore, the plastic molded article has a metallic luster and a design in which the coloring of the plastic base can be seen through. Therefore, by variously changing the coloring of the plastic substrate, it is possible to enrich the design.

[Example] Examples of the present invention will be described below.

(1) First Example-9- On the surface of a plastic base made of ABS resin,
It was colored by applying a yellow lacquer paint and dried at 60°C for 15 minutes. Then, as a target, N + −Or
Alloy (Hastelloy X) was used in Ar gas (pressure was 3
X10-3Torr) 2 depending on the condition of applied voltage 500v
Sputtering is performed for 0 seconds, and 1
A translucent thin film of 0.00 angstroms was formed. The appearance of this plastic molded body was yellow with metallic luster.

(2) Second Example A yellow lacquer paint was applied to the surface of a plastic substrate made of ABS resin to color it and dried at 60° C. for 15 minutes. Next, a Ni-0r alloy (A
in Ar gas (pressure is 3.X1).
Sputtering was performed for 2 minutes under the conditions of an applied voltage of IKV (O-3 Torr). The size of the base is 50×
90IIII.

At this time, as shown in FIG.
10- The repeating member 1 was installed and moved in the direction of arrow A at a speed of 45111111/min.

As a result, a translucent thin film having a continuous thickness of 600 to 507 Angstroms was formed.

The appearance of this plastic molded article changed continuously from white to yellow, was rich in design, and had metallic luster.

(3) Third Example A yellow lacquer paint was applied to the surface of a plastic substrate made from ABS resin to color it and dried at 60° C. for 15 minutes. Next, N1-Cr alloy (Hastelloy X) was used as a target in Ar gas (pressure was 3X
Sputtering was performed for 2 minutes under the conditions of an applied voltage of IKV (10 −3 Torr) and an applied voltage of IKV. At this time, a lattice-shaped continuous hitting member with a thickness of 5 mm was installed in front of the plastic base with an interval of 5 III m. As a result, translucent films with checkered pattern portions having two thicknesses of about 600 angstroms and about 50 angstroms were obtained. The appearance of this plastic molded article was yellow and had a checkered pattern with metallic luster.

(4) Fourth Example A yellow lacquer paint was applied to the surface of a plastic substrate made from ABS resin to color it and dried at 60° C. for 15 minutes. (Size of the substrate is 50x90w+m) A round paper of 30φ was placed on this substrate, and red lacquer paint was further applied to the substrate. Peel off the adhesive paper and 60℃ x 15
Dry for a minute.

Next, a Ni-Cr alloy (Hastelloy X) was used as a target.
) in Ar gas (pressure is 3XIQ 73 To
rr) Sputtering was performed for 20 seconds at an applied voltage of 500 V, thereby forming a translucent thin film of 100 angstroms on the substrate. The appearance of this plastic molded body has a yellow circular pattern, and the other parts are red.
It also retained a metallic luster throughout.

(5) Fifth Example A yellow lacquer paint was applied to the surface of a plastic substrate made from ABS resin to color it and dried at 60° C. for 15 minutes. Next, AI was melted by heating with a filler 12-ment, and A1 was vacuum-deposited on the substrate for 10 seconds under a pressure of 5×10 −5 Torr, thereby forming a translucent thin film of 100 angstroms on the substrate. The appearance of this plastic molded body was yellow with metallic luster.

(6> Sixth Example A yellow lacquer paint was applied to the surface of a plastic substrate made from ABS resin, and it was colored and dried at 60°C for 15 minutes. Then, A1 was heated and melted with a filament, and 5X10- The above substrate (
50 x 90 mm) was vacuum deposited with AI. At this time, the second
As shown in the figure, the continuous striking member 4 is placed in front of the base body 5.
The continuous firing members 4 are installed close to each other at intervals of 901R.
It was moved in the direction of arrow B at a speed of 1/min. This result is 60
A translucent thin film was formed whose thickness varied continuously from 0 to 50 angstroms. The appearance of this plastic substrate changed continuously from the original white color of A1 to yellow, and had a metallic luster.

(7) Seventh Example - 13 - A yellow lacquer paint was applied to the surface of a plastic substrate made from ABS resin to color it, and the coating was dried at 60° C. for 15 minutes. Next, A1 was melted by heating with a filament, and vacuum evaporation was performed on the above substrate (50 x 90 mm) for 1 minute under a pressure of 5 x 10 -5 Torr. At this time, lattice-shaped successive members were provided in close proximity to each other in front of the base body at intervals of 51!1 m. As a result, a translucent thin film having a wall thickness of about 600 angstroms and a wall thickness of 50 angstroms was obtained. A portion of this translucent thin film having a thickness of 50 angstroms has a lattice pattern. The appearance of this plastic molded product was yellow and had a grid-like pattern with metallic luster.

(8) Example 1 A yellow lacquer was applied to the surface of a plastic substrate made from ABS resin, and it was colored and dried at 60°C for 15 minutes (the size of the substrate was 50×90III).
. A 30φ round paper was placed on this substrate, and red lacquer paint was applied to the entire surface of the substrate.

-14- The adhesive paper was removed and dried at 60°C for 15 minutes. Next, heat and melt A1 with a filament to 5X10-5T.
Vacuum deposited on the above substrate for 10 seconds under a pressure of 10
A translucent thin film of 0 angstroms was formed. The appearance of this plastic molded article had a yellow round pattern, the rest was red, and the whole had a metallic luster.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the invention. Figure 1 shows
Fig. 2 is a perspective view of the main part of the main part in a state in which sputtering is being performed while moving the continuous attack member provided in front of the base. FIG. In the figure, 2 and 5 indicate plastic substrates, and 1 and 4 indicate shielding members. -15- Figure 1 Figure 2

Claims (8)

[Claims] (1) A first step of forming a colored plastic substrate having a certain shape, and applying physical vapor deposition to at least a portion of the colored surface of the plastic substrate to a thickness of 50 to 100 angstroms. a second step of forming a translucent thin film made of metal or ceramics, and the coloring of the plastic substrate can be seen through the translucent thin film. Production method. (2) The method for producing a plastic molded article with metallic luster according to claim 1, wherein the physical vapor deposition means is sputtering or vacuum vapor deposition. (3) In the second step, a thin film is formed by physical vapor deposition while moving a bill-shielding member provided in front of the plastic base. A method for producing a plastic molded body. (4) In the second step, a thin film having a thickness of about 50 to 100 angstroms and a thickness of about 600 angstroms is formed by a barrier member of a certain shape provided in front of the plastic base. A method for producing a plastic molded article with metallic luster according to claim 1. (5) The method for manufacturing a plastic molded article with metallic luster according to claim 4, wherein the shape of the bill blocking member is a lattice-like shape. (6) The method for producing a plastic molded article with metallic luster according to claim 1, wherein the plastic substrate has a coating film on at least a portion of its surface. (7) The method for producing a plastic molded article with metallic luster according to claim 1, wherein characters, figures, symbols, and patterns are formed on the surface of the plastic base. (8) The plastic substrate is made of ABS resin. 2. A method for producing a plastic molded article with metallic luster according to claim 1.