JPS5916829B2 - Pseudo-etched pattern formation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a pseudo-etched pattern that has the same effect as etching a substrate with high specular gloss.

Conventionally, as an etching method, resist ink was first printed on a smooth surface using screen printing, etc., and after drying, the areas other than the printed pattern were etched using an etching agent or sandblasting to form an etched pattern, but the processing time was In addition, the former method requires a process to remove resist ink after etching, and the former method uses an etching solution, so it is necessary to dispose of the waste fluid, and the latter method requires a step to remove the resist ink after sandplast. A large-scale device was needed to collect the waste.

In order to solve the problems of the conventional methods as described above, the present inventors invented a method of forming a pattern that has the effect of etching without actually performing etching.

In other words, the present invention applies or prints a transparent or colored transparent coating agent in a pattern onto a base material having a specular gloss of 70% or more, and while the patterned surface is undried or uncured, the entire surface of the patterned surface or This is a pseudo-etching pattern forming method characterized by attaching transparent, colored transparent, white, or particles of the same color as the base material onto a portion, and drying or curing the particles.

As shown in FIG. 1, a pattern is formed on a base material 1 with a high specular gloss of 5 using a transparent or colored transparent coating material 2, and the pattern surface is coated with transparent, colored transparent, white, or the above-mentioned base material. By attaching the particles 3 that have the same color as the material, the specular gloss of the part to which the particles are attached decreases, and the difference in specular gloss from the non-patterned part and the difference in the specular gloss from the non-patterned part and the difference in the specular gloss from transparent 0 to colored transparent coatings and particles make it difficult to remove the difference in the specular gloss of the part where the particles are attached. The same effect as the obtained pattern can be obtained.

In the present invention, specular gloss is defined as Japanese Industrial Standard Z-8.
741, the value measured at an incident angle of 600 by Crossmeter 5- (Murakami crossmeter GM-5 type) is shown, and the metal or glass substrate according to the present invention has a specular gloss of 70% or more. By using this method, a pseudo-etched pattern having the same effect as a conventional etched pattern can be obtained.

0 The base material is a plate made of a metal base material such as steel, aluminum, nickel, copper, or an organic or inorganic glass base material,
It can be applied to molded products such as sheets or containers.

Also, a base material treated with an undercoat or the like may be used, but
The specular gloss of the treated substrate is 70%5 or more. The coating agent used in the present invention refers to paints, printing inks, adhesives, etc., and is coated or printed on a substrate, and particles of the same color or transparency as the substrate are attached when not dried or cured.

The coating agent must be capable of firmly adhering and holding the particles during drying or curing. Therefore, the coating agents used in the present invention include printing inks, paints, adhesives, etc. whose main components are acrylic resins, alkyd resins, urethane resins, epoxy resins, polyamide resins, polyethylene waxes, vinyl acetate resins, etc. However, any material can be used as long as it meets the above conditions. In addition to producing a pseudo-etching effect, the particles used in the present invention are preferably transparent, colored transparent, white, or particles of the same color as the base material, such as glass beads, silicic anhydride, etc. , kaolin, talc, magnesium carbonate, calcium carbonate and the like are preferred.

The etching effect was significantly better when the particle size was 1000 μm or less. Although there is no particular difference in the effect depending on the shape of the particles, it is preferable that the particles adhere to the coated film in a single layer; This was not desirable because the etching effect would be reduced. Methods for attaching the particles include electrostatic spraying, rolling the particles from above, spreading the particles from above, placing a base material on top of the particles, and passing the particles through a particle bath. This can be done by various methods. Particles attached by this method become a coating film that diffusely reflects light, resulting in an etching effect, but the specular gloss of the coating surface of the attached particles is less than 45%. It is desirable to do so. In the present invention, if necessary, after forming a pseudo-etched pattern on the base material, a transparent or colored transparent top coat can be applied.

The top coat prevents the base material from being exposed and prevents corrosion. Unlike conventional etching methods, the present invention has a simple working process, short processing time, and does not use etching chemicals, and uses paint, printing ink, adhesive, etc., so etching patterns can be obtained in a non-polluting manner. It will be done.

In the present invention, although the unevenness is the opposite of the unevenness when actually etched, the printed pattern portion (the entire surface when undercoated or overcoated) has good corrosion resistance.

Next, examples of the present invention will be shown. In the examples, "parts" indicate "parts by weight." Example 1 A water-dispersed acrylic transparent ink was made and the specular gloss was 10.
A film of glass beads is obtained by screen printing a pattern on an aluminum plate of 0 (fl) or more, sprinkling glass beads with a particle size of 100 microns uniformly on the pattern, and baking at 150°C for 10 minutes. The specular gloss was 40%.

The resulting patterned plate had a pseudo-etched pattern that was indistinguishable from that of an etched plate. Example 2 When a solvent-based acrylic transparent paint was applied to the aluminum plate with a pseudo-etched pattern obtained in Example 1 in a thickness of 12 microns, an aluminum plate having a pseudo-etched pattern effect was obtained, almost the same as in Example 1. Obtained.

Example 3 A water-dispersible acrylic transparent ink was screen printed on a transparent glass plate with a specular gloss of 100%, and a particle size of 10
Sprinkle 0 micron glass beads uniformly and heat at 120℃.
By drying for 10 minutes, a glass plate with an etched pattern was obtained without losing transparency and with a specular gloss of 25% in the printed area.

Example 4 When a transparent glass pin with a smooth surface was treated in the same manner as in Example 1 using the same transparent ink as in Example 1, a glass pin having a pseudo-etched appearance in the printed portion was obtained.

Example 5 Paint whose main component is acrylic resin with 100% specular gloss
The above aluminum plate was coated in a pattern, and anhydrous silicic acid with a particle size of 50 microns was sprinkled on the coated surface.
By drying for minutes, the specular gloss of the printed area is 38
%, and the obtained aluminum plate exhibited a pseudo-etched pattern.

Example 6 A copper plate (specular gloss 75%) primed with a 10 micron layer of acrylic transparent paint was offset printed using a colored transparent alkyd ink containing phthalocyanine green, and a 100 micron layer of silicic anhydride was applied to the printed surface. When soaked, the specular gloss of the printed area was 23%, and a copper plate with a pseudo-etched pattern was obtained.

Example 7 A transparent paint whose main component is epoxy resin has a specular gloss of 10.
0% or more to form a pattern, and 50 micron glass beads are uniformly placed on the patterned surface to form a pattern.
By baking at 0° C. for 12 minutes, an aluminum plate having an etching pattern with a difference in specular gloss of 71% was obtained.

Example 8 A transparent paint whose main component is urethane resin has a specular gloss of 10.
0% or more aluminum foil to form a pattern, sprinkle glass beads with a particle size of 200 microns uniformly on the coated surface, and bake at -160°C for 15 minutes to improve specular gloss. An aluminum foil with an etched pattern with a difference of 60% was obtained.

Example 9 A thermosetting adhesive was applied to a portion of an aluminum plate with a specular gloss of 100% or more to form a pattern, and silicic anhydride with a particle size of 300 microns was uniformly applied to the applied surface. ℃
, by baking for 5 minutes, the difference in specular gloss was 63 (
An aluminum plate with an L etching pattern was obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a pseudo-etched pattern according to the present invention. Explanation of symbols in the diagram 1...Base material, 2...Painting agent, 3
···particle.

Claims (1)

[Claims] 1 Apply or print a transparent or colored transparent coating agent in a pattern on a base material with a specular gloss of 70% or more, and while the patterned surface is undried or uncured, on the entire surface or part of the patterned surface, Adhere particles that are transparent, colored transparent, white, or the same color as the base material,
A pseudo-etching pattern forming method characterized by drying or curing.