JPS5834824B2 - How to change the shape of the trunk - Google Patents

Description

Detailed Description of the Invention This invention provides a colored three-dimensional pattern that three-dimensionally reveals a single-color or multi-color pattern on the surface of a base material such as plywood, paper, synthetic resin membrane plate, metal plate, etc. without using a printing process. The present invention relates to a method of manufacturing a sheet.

The gist of the present invention is to form a layer of a colored ultraviolet-curable agent-free resin containing a pigment or dye that transmits ultraviolet rays on a base material, and to form letters, patterns, etc. on the base material. The exposure process was completed by coating a negative or positive film in which the image line appeared in black and white with light and shade gradation, irradiating ultraviolet rays from above, and then peeling off the black and white negative or positive film. Afterwards, by performing a development process to dissolve and remove only the uncured resin that is not exposed to ultraviolet rays, recesses of different depths corresponding to the changes in the gradation of the black and white pattern on the film are made to have the same color as the colored resin. When the uneven colored pattern pattern is revealed to form a sharp single-color three-dimensional pattern, and this is used as the first layer, and a multi-colored pattern is further formed, or yellow by process color separation,
When using halftone dot negatives for red, indigo, and ink, a layer of colored ultraviolet curable resin impregnated with different colored pigments or dyes for each of these colors is formed on the first layer, and the same operation as above is performed. Forming a multicolored three-dimensional pattern by repeatedly forming a second layer of a different color, and repeating this operation several times depending on the number of colors, each time changing the color of the colorant such as a pigment. The invention resides in a method for producing a colored three-dimensional patterned sheet.

As described above, the present invention does not require a printing process to form a pattern, and instead reveals a monochromatic or multicolored three-dimensional pattern by forming a resin wedge, curing with ultraviolet irradiation, and developing the pattern. The purpose of this invention is to form a synchronous three-dimensional colored pattern in which changes in the surface and unevenness correspond well, and the colored three-dimensional pattern sheet obtained by the method of the present invention can be used for interior decoration such as wall materials, floor materials, ceiling materials, etc. It has a wide range of uses, including lumber, furniture such as cabinet materials, parts for indoor equipment, reproductions of paintings as single leafs, and three-dimensional maps.

The following are representative examples of conventionally known manufacturing techniques for colored three-dimensional pattern sheets.

That is, the first method is to laminate a synthetic resin film onto a printing sheet or apply a resin paint, dry it, and then mechanically emboss it using an embossing plate.

In this method, it is difficult to align the printed pattern and the embossed pattern, and the embossed plate is very expensive, making it economically disadvantageous.

The second method uses a synthetic resin curing inhibitor in the printing ink, and forms an embossed pattern by changing the curing speed of the surface resin film layer coated with this resin paint and utilizing the difference in the shrinkage effect of the resin. It's a method.

In this method, the printing ink containing a resin curing inhibitor deteriorates over time, resulting in poor preservation of printed matter, and there is a limit to the embossing effect due to shrinkage changes in the resin, so it is difficult to form embossments over a wide range or deep. Have difficulty.

The third method uses an ultraviolet curable resin, and by placing a film with a UV blocking portion on top of the surface of the base material coated with this resin and irradiating it with ultraviolet rays, the difference in curing speed of the resin can be made. There is a method to make it appear and emboss it.

In this case, the pattern is printed directly on the substrate or formed on the surface of the film and transferred.

However, this method is complicated in that when printing a pattern on the base material, it requires both the printing on the base material and the creation of an embossed part on the film surface. It is necessary to use ink that transmits light and ink that does not transmit light, and for example, there is a constraint that black ink always becomes a depression and light-colored ink always becomes a convex part. There are drawbacks.

Compared to these conventional techniques, the method of the present invention not only does not require an expensive embossing plate, such as those that use an embossing plate to mechanically form an embossed pattern, but also eliminates the need for expensive embossing. Instead of the fact that the plate can be used for only one type of pattern and is economically unsuitable for small lots, the present invention simply uses a negative or positive film and performs an ultraviolet irradiation operation for embossing. It is economically advantageous because it is only necessary to carry out the process.

Furthermore, since the present invention does not perform any printing process, there is no need to prepare and use expensive and elaborate gravure printing plates, and there are no restrictions at all depending on the size of the lot.

Further, in the present invention, since a negative or positive film for forming the uneven pattern of the same color as the colored resin is used, the depth of embossing of each color and the density of the color can be well matched.

In other words, with conventional chemical embossing means, it was extremely difficult to increase the gradation of the depth of the embossing, but with the method of the present invention, the embossing can be made in accordance with the density of the black and white pattern on negative or positive film. By increasing the gradation from the deep part to the shallow part, it is possible to reveal a three-dimensional pattern with depth and shallowness in the unevenness.

Furthermore, if halftone dot negatives are used, it is possible to apply process color separation, and by sequentially using yellow, red, indigo, and ink dot negative films, relief-like three-dimensional color patterns can be revealed. I can do it.

Conventionally, there was no method to make the 1/leaf tone look three-dimensional in color and depth at the same time.

Furthermore, when using the method of the present invention, there is no limit to the depth and width of the embossing, and the sharpness is also good.

In other words, it is possible to emboss the entire thickness of the ultraviolet-curable resin layer, and since the uncured portions of the resin are removed, extremely sharp embossing can be obtained.

Note that since not only negative film but also positive film can be used, reverse embossing can be formed.

Although the resin that can be used in the method of the present invention needs to have ultraviolet curability, this type of resin is a solvent-free curable type, and therefore there is no concern about air pollution due to solvent volatilization.

Also, the curing speed of the resin is much faster than that of conventional catalytic types, allowing for rapid operation.

In the present invention, the application of the ultraviolet curable resin onto the substrate surface is not limited to coating the resin paint, but also includes adhering a pregel sheet of the resin, that is, a sheet-like resin film in an initial semi-cured state, onto the substrate surface. Alternatively, a layer of ultraviolet curable resin may be formed.

In addition, each colored layer includes a three-dimensional multi-layered layer using process color separation negatives, which reveals a multicolor three-dimensional pattern by combining colors, and a combination of each color in a flat solid area, or A colored layer can also be formed by using a halftone dot negative.

Next, the embodiment of the method of the present invention will be explained with reference to the drawings. First, as shown in FIG. 1, a layer 2 of a colored ultraviolet curable resin containing a pigment that transmits ultraviolet rays is formed on the surface of a base material 1, A negative film 3 is coated thereon, which shows the image areas 4 and 5 such as letters and patterns in black and white.

4 is a high-density part of the drawing area, and 5 is a low-density part of the printing part.

Next, ultraviolet rays V1 are applied to the film in the state shown in FIG.
, 5 is removed, leaving only the cured resin 6 as a convex portion, as shown in FIG.

In the first layer, the uncured parts removed by the development process are the recesses 7,
It becomes 7'.

In this case, the recess 7 corresponding to the high concentration portion 4 is deep, and the recess V corresponding to the low concentration portion 5 is shallow, as shown in FIG.

On top of the state shown in FIG. 2, a layer 8 of an ultraviolet curable resin containing a pigment of a different color from that shown in FIG. Another negative film 9 showing the image in black and white is coated as shown in FIG.

The image area 10 is a high-density area, and the image area 11 is a low-density area.

Next, UV irradiation V2 is applied to the state shown in FIG. 3 using a mercury lamp or a chemical lamp, etc. After the UV irradiation, the film 9 is peeled off and developed, and the uncured resin corresponding to the image areas io and 1i is applied. is removed, leaving only the hardened resin 12 of a different color as a convex portion, as shown in FIG.

(Second layer) The uncured portions removed by the development process become recesses 13 and 13'.

In this case as well, the concave portion 13 corresponding to the high concentration portion 10 is deep, and the concave portion 13' corresponding to the low concentration portion 11 is shallow, as shown in FIG.

Substrates that can be used in the method of the present invention include plywood, particle board, paper, synthetic resin membrane plates, metal plates, and the like.

Suitable UV-curable resins include unsaturated polyester resins, acrylic resins, TS/Tan resins, alkyd resins, and epoxy acrylate resins.

As for the formulation of the unsaturated polyester resin paint, for example, the following is used.

The colorant such as a pigment that colors the ultraviolet curable resin may be any colorant such as a pigment or dye that transmits ultraviolet light, and organic pigments can mainly be used.

The amount added may be 1 to 50% by weight based on the resin content.

The optimal film (negative or positive film) that can be used is a transparent film such as Tetron, polypropylene, vinylon, cellophane, etc., and has a thickness of 25 to 100 .mu.m.

To form an ultraviolet curable resin layer on a base material, the resin coating is coated with a coating method such as roll coating, reverse coating, curtain flow coating, etc. to a coating thickness of 50 to 300'. Apply an amount of /-.

Further, instead of applying a resin paint, a sheet-like material of an ultraviolet curable resin in an initial hardening state, that is, a pregel sheet, may be adhered to ensure the surface condition.

A certain amount of resin is placed on the base material, and Tetoron, cellophane,
A method may also be used in which a film of polypropylene, vinylon, etc. is coated thereon to provide a smooth surface.

In this case, the coated film is peeled off after the resin curing operation is completed.

In addition, the adhesion between UV-curable resins is poor, and when a UV-curable resin film is further formed on the same resin layer once cured, the adhesion at the interface between them is insufficient and they do not adhere tightly to each other.

As a method to improve these points, it is appropriate to take the following measures.

(b) Addition of additives effective in improving adhesion, such as isocyanate, to the ultraviolet curable resin to be used.
About 10% by weight, or 5 to 30% by weight of a thermoplastic synthetic resin such as vinyl hydrochloride or vinyl acetate is added.

(b) The ultraviolet curable resin is not completely cured, leaving a slight uncrosslinked state.

()) Filler such as silica, UV curable resin, etc.
Used by mixing fine powder of clay, aluminum hydroxide, etc.

(→ Make the surface coated with UV-curable resin matte.

Also, the surface of the surface film that comes into contact with the resin is matte (rough surface).
You can also do this.

(7t9 A UV curable resin and a room temperature curable resin are used together, and the room temperature curable resin is made into a state in which a slight amount of uncrosslinked portion remains.

The maximum wavelength of ultraviolet rays used is 3.
It is appropriate to select and use a material that has a characteristic of having very little absorption at 65 mμ.

Furthermore, by adding a sensitizer to the ultraviolet curable resin and selecting the type and amount of the sensitizer added, the range of usable pigments can be expanded.

Examples of sensitizers that can be used in this case include benzoin,
Add benzoin methyl ether, benzoin ethyl ether, azobisisobutylnidonyl, etc. 1 to 2 times per resin.
Add approximately 0% by weight.

Examples of the pigments to be used include the following.

Yellow pigment anthraquinone pigment CI Bat-E o-2
0 (CI Vat Yellow 20) (C
I 6820) Red pigment Azo pigment CI Pigment Red 18 (
CI Vigment Red l 8) (C1
12350) Blue pigment CI Pigment blue 15, a phthalocyanine pigment.
1 (CI 74160) Next, examples of the method of the present invention will be described.

Example 1 A commercially available sealer was applied onto plywood using a roll coater, and after drying, an ultraviolet curing resin Goselac UV-2 was applied.
00 (trade name, manufactured by Nippon Gosei Kagaku Kogyo Co., Ltd.) with 10% of a transparent light brown pigment that transmits ultraviolet rays added thereto at a rate of 100 f/m to form a resin layer, and the surface of the resin layer is used as a wood grain conduit. It was covered with a black and white negative film showing the part pattern, and then heated with a high pressure mercury lamp (W -30W/Cry at 2).
After irradiating with ultraviolet rays for 30 seconds in step f), the film was peeled off, and then Triclean paper was sprayed for 30 seconds in Triclean paper to wash off the uncured resin that was in the negative areas of the film pattern that were not exposed to ultraviolet rays. This is the first layer.

Next, the same COACERAK UV-200 containing 10% by weight of a darker brown pigment than in this first layer is applied uniformly on the first layer, and the gradation of the conduit part of the wood grain and other tone patterns is applied. The second layer is formed by coating a negative film having the same composition, irradiating it with ultraviolet rays as in the case of the first layer, and then performing a development process to remove the resin in the uncured areas.

By doing so, the first layer and the second layer were integrated, and a synchronously colored three-dimensional woodgrain pattern sheet that closely resembled natural wood was produced.

Example 2 An aluminum plate coated with adhesive paint using acrylic paint and three mesh negative films separated into three colors of yellow, red, and indigo were prepared. A colored ultraviolet curable resin was prepared by adding 10% by weight of each color of pigment to an ultraviolet curable resin Goselac UV-200.

First, a yellow ultraviolet curable resin was first coated on an aluminum plate in a layer with a thickness of 100 μm, and the first layer was shaped using a net negative film for yellow in the same manner as in Example 1. Then, repeat the same operation as above using a net negative film for red color and a net negative film for indigo color using an indigo ultraviolet curable resin to form and integrate the second and third layers. In this way, the original color (color original used for three-color separation) is reproduced using three colors, and each color is colored so that the dark color part is convex and the light color part is concave, depending on the density. A relief pattern was created.

The film used in this case was a matte film, and 5% by weight of ethylene vinyl acetate was added to the ultraviolet curable resin to improve the adhesive strength between each resin layer.

[Brief explanation of the drawing]

1, 2, 3, and 4 are cross-sectional views showing an embodiment of the present invention in the order of its steps. 1...-Base material, 2...-Colored ultraviolet curable resin layer, 3...-Negative film, 4, 5...-
Image area, 6...- Convex portion made of cured resin, 7, 7'
...--concavity due to uncured portion, 8---colored ultraviolet curable resin layer (second layer), 9---negative film for second layer, 10, 11--・-・Print area, 12
・−・−・Protrusion made of cured resin (second layer), 13, 1
3'---concavity (second layer) due to non-hardened portion, Vl
, V2-...-UV irradiation.

Claims (1)

[Claims] 1 A layer of colored transparent UV-curable agent-free resin containing a pigment or dye that transmits ultraviolet rays is formed on the base material, and lines such as letters and patterns are printed on it in shading. The exposure process is completed by coating a black and white negative or positive film with gradations and irradiating it with ultraviolet rays, then peeling off the black and white negative or positive film, and then developing it. By dissolving and removing only the uncured resin that is not exposed to ultraviolet rays, a transparent pattern with concavities and convexities of the same color as the colored resin is created by recesses of different depths that correspond to changes in the gradation of the black and white pattern of the film. The pattern is revealed to form a sharp, transparent, monochromatic three-dimensional pattern, which is used as the first layer, and then the same operation as above is repeated to form a second layer of a different color. A colored three-dimensional pattern is created by repeating this process several times depending on the number of colors, changing the color of the pigment or other coloring agent each time, and forming a multicolored three-dimensional pattern by the color of each layer and the overlap of each layer. Method of manufacturing sheets.