JPH028787B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a substrate having a crack pattern surface, and more particularly to a method for manufacturing a substrate having a crack pattern surface, and more particularly, the present invention relates to a method for manufacturing a substrate having a crack pattern surface, and more particularly, to a method for manufacturing a substrate having a crack pattern surface.
The purpose is to easily create the desired degree of crack pattern on the surface of various base materials such as paper and ceramics.

The crack pattern surface is mainly used to enhance the decorative effect.
It has been formed on the surface of various substrates. For example, crack patterns have been formed on the surfaces of plastics, metals, glass, ceramics, paper, etc. using methods appropriate for each material. That is, for plastics, it is formed by molding and by appropriately selecting the heating temperature during molding (see Japanese Patent Publication No. 55-27879), and for metals, it is formed by etching, glass, etc.
Cracks have been formed on ceramics by applying special glazes and firing methods, and on paper by embossing and rolling (see Japanese Patent Publication No. 7836/1983). . Various base materials with cracked surfaces obtained in this way can be used for containers, decorative laminates,
It is applied to a wide variety of fields, including furniture, interior goods, accessories, decorative glass, cabinets for electrical appliances, automobile parts, binding for books and notebooks, and marking on business cards and postcards. However, as mentioned above, the manufacturing method differs depending on the various base materials, and those using special methods require a lot of time and skill on the part of the workers, and when using molds for molding, the cost is high. There were some flaws that made me get used to it.

In view of the above-mentioned current situation, the present inventors have completed the present invention as a result of various research and considerations. That is, in the present invention, after forming the curable resin layer 2 on the surface of the base material 1, the curable resin layer 2 is brought into a semi-cured state by a treatment such as heating, and then an organic solvent is brought into contact with the surface of the curable resin layer 2. This is a method for producing a base material having a crack-patterned surface, which is characterized in that the curable resin layer is completely cured by heating to cause cracks, and then by heating or other treatment.

The present invention will be explained in more detail below.

In the present invention, various materials such as plastics, metal, glass, ceramics, paper, etc. can be used as the base material. Moreover, these shapes can be applied to various objects such as three-dimensional objects and sheet-like objects. In particular, when applied to paper sheets, decorative sheets can be obtained.

First, a curable resin layer 2 is formed on a necessary portion of the surface of the base material 1 by means of coating, dipping, printing, spraying, or the like (see FIG. 1). The curable resin herein means a resin that is cured by treatment such as heating, ultraviolet irradiation, electron beam irradiation, and X-ray irradiation. Examples include thermosetting resins such as melamine and acrylic, and ultraviolet curable resins such as urethane acrylate and polyester acrylate.

The formed curable resin layer 3 is subjected to the above-mentioned heating or other treatment for curing the resin used to bring the curable resin layer 3 into a semi-cured state. The semi-cured state is the state before complete hardening, and the processing temperature,
By appropriately adjusting treatment intensity, time, etc., the desired degree of hardening can be achieved.

After the curable resin layer 3 is brought into a semi-cured state, it is brought into contact with an organic solvent such as Kents, esters, hydrocarbons, etc. by coating, dipping, printing, spraying, or the like. In this step, cracks are formed on the surface of the curable resin layer 2 (see FIG. 2). The cause of this cracking is not certain, but the relatively uncured parts of the semi-cured resin are dissolved and removed by contact with the organic solvent, and at the same time the hardening progresses. It is presumed that the portion formed by the resin is condensed by the condensation force inside the resin, and is formed by mutual action. A crack pattern with different roughness appears depending on the degree of curing in the semi-cured state and the solvent treatment conditions.

Next, by the treatment such as heating, the curable resin layer 2
Let it completely harden.

A coloring agent such as a dye or a pigment may be appropriately mixed in the curable resin layer 2 in advance. Further, a coloring agent layer or a metal vapor deposition layer may be separately provided before forming the curable resin layer 2 or after forming it and completely curing it.

If you want to partially create a crack pattern, you can form letters, pictures, etc. in a pattern by applying a resist layer 3 to the required areas on the curable resin layer 2 before contacting the organic solvent. can. The resist layer 3 may be of any material as long as it is sparingly soluble or insoluble in organic solvents. For example, it can be formed using a water-soluble resin such as polyvinyl alcohol or adhesive tape. When the resist layer 3 is formed, after formation,
It is brought into contact with an organic solvent and subjected to treatment such as heating. After that, when the resist layer 3 is removed by an appropriate means,
On the surface, there are parts with and without crack patterns, and depending on the pattern, it is possible to enhance the decorative effect or express letters and pictures (see Figures 3 and 4).

Since the present invention is a method for manufacturing a base material having a crack-patterned surface as described above, it can be applied to various base materials, and a crack-patterned surface of a desired degree can be easily obtained. Since the process is relatively simple, it can be easily carried out without special skill.
Furthermore, since the obtained substrate surface is a completely cured resin layer, it has excellent physical properties and can be used for various purposes.

Examples of the present invention will be described below.

All parts represent parts by weight.

<Example 1> A curable resin layer with a thickness of 10 μm was formed on the surface of an aluminum plate by a spray method using a resin mixture having the composition shown below.

Butylated melamine resin 15 parts Solid epoxy resin 3 parts Titanium oxide 5 parts Toluene 37 parts Methyl ethyl ketone 40 parts Next, the aluminum plate was heat-treated at 150°C for 10 minutes, and then methyl ethyl ketone was sprayed to coat the surface of the curable resin layer. A crack pattern was formed.

Next, the aluminum plate was heat treated at 160°C for 15 minutes.

By doing so, an aluminum plate having a beautiful crack pattern was obtained.

<Example 2> A curable resin layer having a thickness of 5 μm was formed on the side surface of a glass bottle by a spray method using a resin mixture having the composition shown below.

Thermosetting acrylic resin 15 parts Butylated urea resin 8 parts Solid epoxy resin 1 part Transparent processing pigment 8 parts Toluene 68 parts Next, the glass bottle was heat-treated at 160°C for 15 minutes, and then an ink having the following composition was applied. A resist layer consisting of cut-out characters "NISSHA" was formed using a screen printing method.

Hydroxypropyl cellulose 30 parts Magnesium carbonate 10 parts Isopropyl alcohol 30 parts Isobutyl alcohol 30 parts Next, spray methyl ethyl Kent onto the surface of the glass bottle to form a crack pattern on the surface of the curable resin layer where the resist layer is not formed. I let it happen.

Thereafter, the resist layer was removed using a 1:1 mixture of water and alcohol, and then heat treatment was performed at 160° C. for 15 minutes.

By doing this, a glass bottle called "NISSHA" with a beautiful crack pattern was obtained.

[Brief explanation of drawings]

FIGS. 1 and 2 are surface schematic diagrams showing each step in the present invention, and FIGS. 3 and 4 are cross-sectional schematic diagrams showing each step in another embodiment of the present invention. In the figure, 1... base material, 2... curable resin layer, 3...
...Resist layer.

Claims (1)

[Claims] 1. After forming a curable resin layer on the surface of a base material, the curable resin layer is brought into a semi-cured state by treatment such as heating, and then an organic solvent is brought into contact with the surface of the curable resin layer. 1. A method for producing a substrate having a crack-patterned surface, the method comprising: generating cracks in the curable resin layer, and then completely curing the curable resin layer by a treatment such as heating. 2. The method for producing a substrate having a crack pattern surface according to claim 1, characterized in that a resist layer is partially provided on the curable resin layer before contacting with an organic solvent.