JPH0588677B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing an uneven pattern forming body.

[Problems to be solved by conventional technology and invention]

Conventionally, for example, in order to give a three-dimensional effect to a pattern on a smooth surface, the pattern itself has been made thicker, but in order to give the pattern thickness, a special printing method is required. Moreover, there was a problem in that it was difficult to form sharp bulges, and beautiful three-dimensional patterns could not be easily formed. Moreover, as a matter of course, the resulting three-dimensional patterned product lacked sharpness and three-dimensional effect, especially in the three-dimensional pattern itself.

The present invention has been made in view of the above points, and an object of the present invention is to provide a method for manufacturing an uneven pattern that can easily produce an uneven pattern forming body that exhibits a sharp and beautiful three-dimensional effect.

[Means to solve the problem]

The method for manufacturing a concavo-convex pattern formed body of the present invention is characterized by sequentially performing the following steps.

(a) A step of providing an ionizing radiation-shielding pattern on either the front or back surface of an ionizing radiation-transparent release base material whose surface is releasable; (c) a step of curing the ionizing radiation-curable resin layer corresponding to the portion without the ionizing radiation-shielding pattern by irradiating ionizing radiation from the release base material side; (d) A step of peeling off the release base material and attaching a portion of the uncured resin of the ionizing radiation curable resin layer to the release base material and removing it to form a recess corresponding to the ionizing radiation shielding pattern.

(e) After applying a solvent on the uneven pattern formed in step (d), buffing is performed using a brush or a cotton buffing roller to remove uncured material remaining in the recesses of the uneven pattern. (f) Applying wamping ink to the entire surface of the uneven pattern formed in step (e), and immediately after that, removing the ink present on the convex parts of the uneven pattern. A process in which the wiping ink remains only in the recesses by scraping it off.

Further, the manufacturing method of the present invention provides a pattern layer on a release base material, transfers and forms the pattern layer on the convex portion of the uneven pattern by peeling off the release base material, and further peels off the release base material, and then transfers the pattern layer onto the uneven pattern. A protective layer is coated on the entire surface of the pattern or only on the convex portions.

[Effect]

According to the present invention, the ionizing radiation-curable resin on the base material for forming the concavo-convex pattern is removed by peeling off the peeling base material without curing in the area where the ionizing radiation-shielding pattern is present. The ionizing radiation-curable resin hardens and remains in the areas where there is no ink, forming an uneven pattern.Then, the uncured ionizing radiation-curable resin remaining in the recesses is removed, and wamping ink is left only in the recesses. . As a result, a concavo-convex pattern forming body having a sharp and beautiful concavo-convex pattern with excellent three-dimensional effect is obtained on the concavo-convex pattern forming substrate.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In the manufacturing method of the present invention, first, as shown in FIG. 1, a release base material 12 having an ionizing radiation shielding pattern 11 provided on either the front or back surface is prepared.

The release base material 12 is made of a sheet or film that is transparent to ionizing radiation, and when the ionizing radiation is ultraviolet rays, examples thereof include sheets or films of polyester, polyamide (such as nylon), polypropylene, and fluorine resin. , those containing no pigments or the like that affect ultraviolet transmittance are preferred. When the ionizing radiation is an electron beam, there are no restrictions because the electron beam has high transparency, and in principle, the above-mentioned sheets or films that transmit ultraviolet rays can be used, and paper and the like can also be used. In addition, at least the surface of the release base material 12 that comes into contact with the ionizing radiation curable resin layer 13 (FIG. 3) must be releasable, and if the material itself does not have releasability, a releasable resin or It is used as a surface removable material by applying a composition or the like. The thickness of the base material 12 is 5
~200 μm, particularly 25-100 μm is preferred. The ionizing radiation shielding pattern 11 is for shielding ionizing radiation when ionizing radiation is irradiated from the upper surface side of the release base material, and the pattern 11 is provided at the first position.
As shown in the figure, it may be on the lower surface side of the release base material 12, or it may be on the upper surface side of the release base material 12 although not particularly shown. It may be provided on a pattern layer or the like.

When the ionizing radiation is ultraviolet rays, the material forming the ionizing radiation shielding pattern 11 may be a substance that reflects and shields ultraviolet rays, such as a filler such as titanium oxide, potassium sulfate, or calcium carbonate, or a particle size of 0.3 Ink containing pigments with large hiding power at ~10 μm, substances that absorb ultraviolet rays, such as ultraviolet absorbers such as benzophenol, salicylate, benzotriazole, and acrylonitrile, light-absorbing pigments, carbon black, or inorganic substances. In addition, inks containing a quencher (for example, a metal complex salt type or a hindered amine type) can be mentioned. When the ionizing radiation is an electron beam, examples include the above-mentioned inks and inks containing other pigment-based inks. The ionizing radiation shielding pattern 11 can be formed using these inks by a normal printing method.

Next, in the method of the present invention, the release base material 12 provided with the ionizing radiation-transparent pattern 11 is converted into a base material for forming an uneven pattern by coating a separately prepared ionizing radiation-curable resin layer 13 as shown in FIG. 2 resin layer 13
It is preferable to overlap the sides of the release base material 12 in close contact with each other (FIG. 3), but it is preferable to use the release base material 12 by stretching it over a frame, as this allows the release base material 12 to be used repeatedly. The ionizing radiation curable resin layer 13 may be provided by coating it on the base material 2 for forming an uneven pattern, or may be provided by coating it on the release base material 12. It may also be provided by applying it to the surface.

The base material 2 for forming the uneven pattern may be of any material, such as a plate or molded product of metal such as stainless steel, steel, aluminum, or copper, glass, marble, ceramics, gypsum board, asbestos cement board, Calcium silicate plates, inorganic plates or molded products such as GRC (glass fiber reinforced cement), organic polymer plates such as polyester, melamine, polyvinyl chloride, diallyl phthalate, etc.
molded products, or these sheets, films,
Wooden boards or molded products such as wood, plywood, particle board, paper such as tissue paper, bleached kraft paper, titanium paper, linter paper, paperboard, gypsum board paper; polyethylene film, polypropylene film, polyvinyl chloride film, polyvinylidene chloride film , polyvinyl alcohol film, polyethylene terephthalate film, polycarbonate film, nylon film, polystyrene film, ethylene vinyl acetate copolymer film, ethylene vinyl alcohol copolymer film, ionomer, and other plastic films; metal foils such as iron, aluminum, copper, etc. Examples include sheets; and composites of the above materials. These base materials 2 for forming an uneven pattern may be subjected to surface treatment such as sealing treatment or primer treatment, treatment for improving adhesiveness, and the like.

The ionizing radiation curable resin layer 13 is mainly composed of polymers, oligomers, monomers, etc. that have radically polymerizable double bonds in their structure, and contains photopolymerization initiators, sensitizers, and other non-reactive substances as necessary. It contains polymers, organic solvents, waxes, and other additives, and various grades of it are readily available on the market and can be used in the present invention. Moreover, a flame retardant, a conductive material, etc. can be mixed into the ionizing radiation-curable resin layer 13 to impart functions such as flame retardancy and conductivity. Further, the resin layer 13 is preferably a transparent or semitransparent layer. The ionizing radiation-curable resin layer 13 can be formed by a known method such as gravure coating, roll coating, flow coating, or spray coating. The thickness of the resin layer 13 is
3 μm to 1 mm, particularly 30 to 200 μm is preferred.

Next, the release base material 12 and the uneven pattern forming base material 2
After overlapping them with the ionizing radiation-curable resin layer 13 interposed therebetween to bring them into close contact, ionizing radiation 14 is irradiated from the release base material 12 side (FIG. 3). Typical examples of ionizing radiation 14 are ultraviolet light and electron beams, but other radiation can also be used. ionizing radiation 14
By the irradiation, the ionizing radiation curable resin layer 13 is cured in the areas where the ionizing radiation shielding pattern 11 is not provided.
Further, in a portion where the ionizing radiation shielding pattern 11 is present, the ionizing radiation curable resin layer 13 is left uncured.

When the release base material 12 is peeled off after irradiation with the ionizing radiation 14, uncured ionizing radiation-curable resin adheres to the release base material 12 in the uncured portions of the ionizing radiation-curable resin layer 13, as shown in FIG. When the base material 12 is peeled off, the adhered portion is removed, and as a result, a recess 6 in which a small amount of uncured ionizing radiation curable resin remains and a convex portion 4 made of the cured ionizing radiation curable resin are formed. Ru. As a result, a concave-convex pattern 3 consisting of concave portions 6 and convex portions 4 is formed on the base material 2.

Next, in the method of the present invention, an appropriate amount of the uncured ionizing radiation curable resin 13a remaining in the recess 6 is removed. At this time, the uncured resin 13a is not limited to being completely removed as shown in FIG. 5, but a predetermined amount of a portion thereof may be removed. To remove this uncured resin 13a, various physical removal methods,
There is a chemical removal method, but there is a chemical removal method that takes advantage of the high solubility of the remaining uncured portion in solvents and uses an appropriate solvent to dissolve and remove the uncured ionizing radiation curable resin. It is preferable to adopt it. Solvents used for dissolution and removal include esters such as ethyl acetate and n-butyl acetate; ketones such as methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone; and alcohols such as ethanol, isopropanol, and n-butanol. Select and use according to the type of ionizing radiation-curable resin. Removal by dissolution with these solvents can also be carried out by dipping alone, but in the present invention, after applying the solvent to the formed uneven pattern, the method involves buffing using a brush or cotton buffing roller. Adopt. After this step of removing the uncured resin, the remaining uncured resin is preferably cured at a predetermined time.

After removing the uncured resin in the recesses 6, in the present invention, a wamping ink layer 7 is applied to the recesses. This coating formation is performed by applying normal wiping ink to the entire surface of the uneven pattern 3, and immediately thereafter scraping off only the ink existing on the convex parts of the uneven pattern with a doctor blade.
As a result, the wiping ink remains only in the recess 6. This wiping ink layer 7
By providing this, a design effect that matches the concave pattern can be obtained.

Through the above steps, basically, an uneven pattern formed body 1 as shown in FIG. 6, for example, is obtained by the manufacturing method of the present invention.

In the method of the present invention, by providing the pattern layer 5 on a peelable base material 12, the pattern layer 5 is transferred onto the convex portions 4 of the uneven pattern 3 by peeling off the base material 12, as shown in FIG. can be formed. This pattern layer 5
are formed using various paints or inks depending on the purpose. The pattern layer 5 is transparent to ionizing radiation because it is necessary to transmit ionizing radiation to cure the ionizing radiation-curable resin layer. When the ionizing radiation is ultraviolet radiation, to ensure ultraviolet transparency,
It is better to avoid using too many pigments and fillers that impede ultraviolet transmittance, and it is better to color with dyes or use pigments with extremely small particle sizes. The pattern layer 5 may be formed as a uniform layer (so-called solid layer) or may be provided in a pattern. The pattern layer may be a printed layer of one color or a printed layer of two or more colors.
By providing this pattern layer 5, a design effect matching the convex pattern can be obtained.

Further, in the present invention, after the release base material 12 is peeled off, a protective layer 8 is coated on predetermined locations on the uneven pattern 3 in order to protect the surface of the pattern 3 and the like. The protective layer 8 may be formed only on the convex portions 4 of the uneven pattern, or may be formed on the entire surface of the uneven pattern 3 (FIG. 7). Further, the protective layer may be formed of the same ionizing radiation-curable resin as described above, but may also be formed of a thermosetting resin.

Furthermore, in the present invention, as the base material 2 for forming an uneven pattern, one provided with a colored pattern layer 9 as shown in FIG. 7 or one having an uneven surface can be used, if necessary. The colored pattern layer 9 is a colored layer, a patterned layer, or a combination of both layers, and may be provided on the entire surface of the base material 2 or on a part thereof. Further, the pattern in which the colored pattern layer 9 is provided may be provided in a pattern that is synchronized with the pattern of the ionizing radiation shielding pattern 11, but it is not necessarily necessary to form the both so that they are synchronized. The colored pattern layer 9 can be formed by a known printing method using ordinary ink, paint, etc., but it is also possible to transfer the colored pattern itself onto the base material 2 or laminate a sheet provided with a colored pattern. It can also be formed by Further, the colored pattern layer 9 is normally provided on the side (top side) on which the ionizing radiation curable resin layer 13 of the base material 2 for forming an uneven pattern is provided, but when the base material 2 is made of a transparent material, the base material 2 It can also be provided on the lower surface side. When using the uneven pattern forming base material 2 having an uneven surface,
The uneven pattern 3 follows the uneven surface. Moreover, the unevenness itself may exist in a part of the surface of the base material 2.

In the above example, an ionizing radiation shielding pattern is provided on the release base material side and ionizing radiation is irradiated from the release base material side. However, when the base material for forming the uneven pattern is transparent to ionizing radiation, It is also possible to provide a pattern-forming substrate with an ionizing radiation-shielding pattern and irradiate the ionizing radiation from the uneven pattern-forming substrate side. The ionizing radiation shielding pattern can also be formed on a sheet separate from the release base material and used by overlapping the release base material.

Although the uneven pattern formed body 1 obtained by the method of the present invention can be applied to any purpose, it is most preferably used as a decorative material.

Hereinafter, the present invention will be explained in more detail by giving specific examples.

Example 1 A polyester film (manufactured by Toray Industries, Inc.) was used as a release base material, and an abstract pattern was printed on the surface using ultraviolet-shielding white ink (manufactured by Moroboshi Ink Co., Ltd.) using a gravure plate with a plate depth of 60 μm. did.

On the other hand, a transparent colored ultraviolet curable paint (manufactured by Nippon Paint Co., Ltd.) was applied to one side of a vinyl chloride plate (thickness 5 mm).
was flow coated to a thickness of 100 μm.

Next, overlap the release base material so that the non-printed surface is in contact with the surface coated with the ultraviolet curable paint,
Irradiation was carried out from the release base material side while passing through an irradiation device equipped with five ozone-less ultraviolet lamps with an output of 80 W/cm at a speed of 20 m/min, and after irradiation, the release base material was peeled off.

Due to this peeling of the release base material, the UV-curable paint corresponding to the part without the white ink pattern provided on the release base material is cured, forming convex parts with the UV-curable paint, and the part with the white ink pattern is cured. In the corresponding portion, a portion of the uncured ultraviolet curable paint adhered to the release base material and was removed when the release base material was peeled off, forming a recessed portion.

After the peeling base material was peeled off, the uncured ultraviolet curable paint partially remaining in the recesses of the uneven surface was removed by buffing with a rotating brush using a solvent containing toluene and ethyl acetate as main components.

Next, colored ink (manufactured by Showa Ink:
W-141) was used for wiping painting, and then an ultraviolet curable paint (manufactured by Nippon Paint) was applied to the entire surface using a flow coating method to a thickness of 50 μm and cured.

The resulting concavo-convex pattern formed body has a sharp concave-convex pattern, and the concavities and convexities are filled with colored ink, so that the concavo-convex pattern is emphasized. When this formed product was used as a decorative material, it had a rich coating feel (depth).

〔Effect of the invention〕

As explained above, in the manufacturing method of the present invention, a base material for forming an uneven pattern and a release base material having an ionizing radiation shielding pattern are stacked together via an ionizing radiation curable resin layer, and then ionizing radiation is irradiated. An uneven pattern consisting of a recessed portion and a convex portion made of the cured ionizing radiation-curable resin, which is formed by peeling off a release base material, adhering an uncured ionizing radiation-curable resin to the release base material, and removing it to form a recessed portion. After that, the uncured ionizing radiation curable resin remaining in the concave portions of the uneven pattern is removed by buffing after coating with a solvent, and further,
Since the wiping ink is applied only to the concave portions, the final result is a concavo-convex pattern with a beautiful concavo-convex pattern that is sharp and has an excellent three-dimensional effect, and the wiping ink layer on the concave portions provides a design effect that is in tune with the concave pattern. A pattern-forming body can be easily produced.

In addition, since the method of the present invention removes the uncured resin remaining in the recesses, the depth of the recesses and the sharpness of the edges of the recesses are better than those obtained by simply peeling off the release base material, giving a three-dimensional effect. A textured pattern rich in texture is obtained. Furthermore, after removing the uncured resin remaining in the recesses, wiping ink, which is a liquid ink, is applied to the entire surface of the uneven pattern, and then only the ink on the projections is scraped off and the ink is applied only to the recesses. It is possible to satisfactorily fill and apply the wiping ink even to minute recesses. For example, if a fine concave shape such as a conduit groove in the wood grain is formed as a concave part,
The wiping ink can be reliably filled and applied to the recessed portion, and the design effect of the wiping ink can be sufficiently obtained even in the minute recessed portion, which is beneficial.

Furthermore, in the method of the present invention, if a material provided with a pattern layer is used as a release base material, the pattern layer can be transferred and formed on the convex portions of the uneven pattern by peeling off the base material, and the pattern layer can be used to form the pattern layer on the convex portions of the uneven pattern. It is possible to obtain an uneven pattern with a design effect that matches the pattern. Further, by forming a protective layer on the entire surface of the uneven pattern or only on the convex portions after peeling off the release base material, it is possible to obtain an uneven pattern with excellent durability.

As described above, the uneven pattern formed body obtained by the production method of the present invention, which has an uneven pattern that is sharp and has an excellent three-dimensional effect, and has excellent design properties and durability, is particularly useful when used as a decorative material. .

[Brief explanation of the drawing]

FIGS. 1 to 5 are longitudinal cross-sectional views of each step showing an example of the manufacturing method of the present invention, and FIGS. 6 and 7 are longitudinal cross-sectional views showing representative examples of the uneven pattern formed body obtained by the present invention. It is. DESCRIPTION OF SYMBOLS 1... Uneven pattern formation body, 2... Substrate for uneven pattern formation, 3... Uneven pattern, 4... Convex part, 5... Pattern layer, 6... Concave part, 7... Wiping ink layer, 8
... Protective layer, 11 ... Ionizing radiation shielding pattern, 1
2... Release base material, 13... Ionizing radiation curable resin layer, 14... Ionizing radiation.

Claims (1)

[Scope of Claims] 1. A method for producing an uneven pattern formed body, characterized by performing the following steps in order. (a) A step of providing an ionizing radiation-shielding pattern on either the front or back surface of an ionizing radiation-transparent release base material whose surface is releasable; (c) a step of curing the ionizing radiation-curable resin layer corresponding to the portion without the ionizing radiation-shielding pattern by irradiating ionizing radiation from the release base material side; (d) A step of peeling off the release base material and attaching a portion of the uncured resin of the ionizing radiation curable resin layer to the release base material and removing it to form a recess corresponding to the ionizing radiation shielding pattern. (e) After applying a solvent on the uneven pattern formed in step (d), buffing is performed using a brush or a cotton buffing roller to remove uncured material remaining in the recesses of the uneven pattern. (f) Applying wamping ink to the entire surface of the uneven pattern formed in step (e), and immediately after that, removing the ink present on the convex parts of the uneven pattern. A process in which the wiping ink remains only in the recesses by scraping it off. 2. The method for producing an uneven pattern formed body according to claim 1, wherein a pattern layer is provided on a release base material, and the pattern layer is transferred and formed on the convex portions of the uneven pattern by peeling off the release base material. 3. Claim 1, wherein after the release base material is peeled off, a protective layer is coated on the entire surface of the uneven pattern or only on the convex portions.
Or the manufacturing method of the uneven|corrugated pattern formation object of 2.