JPH0661525B2 - Method for manufacturing decorative material having uneven pattern - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for producing a decorative material having an uneven pattern.

[Problems to be Solved by Prior Art and Invention]

Decorative materials have conventionally been constructed by providing a pattern layer on the base material of the decorative material by direct printing or thermal transfer in order to impart design characteristics, but the surface of the base material is smooth and sharply raised. There is a limit to the formation of the pattern layer, and in the end, it becomes a smooth pattern layer and is inferior in three-dimensional design. Further, in order to obtain a decorative material having an uneven pattern with a three-dimensional effect, a method is known in which a pattern layer is formed by printing on a surface-smooth base material by a normal printing method, and then embossing is performed. In the case of the method, although it is possible to obtain a feeling of unevenness, it is difficult to obtain the pattern layer and the uneven shape by embossing in synchronization with each other as desired.

Further, in any of the above methods, when a base material having a curved surface such as an uneven surface is used instead of the base material having a smooth surface, a fine pattern layer is formed on the curved surface by gravure printing or embossing is performed. It was difficult to apply, and it was impossible to apply it especially when the substrate had a complicated curved surface shape.

The present invention has been made in view of the above points, and even if the decorative material base material has various curved surfaces, a desired uneven shape (pattern) is obtained.
Can be easily and surely applied, and the concavo-convex pattern and the pattern layer, etc. can be formed in perfect synchronization, and the decorative material can be formed on the curved surface of the base material with a uniform thickness. It aims at providing the manufacturing method of.

[Means for Solving the Problems]

The method for producing a decorative material of the present invention is basically characterized by sequentially performing the following steps (a) to (e).

(a) the surface of the ionizing radiation permeable sheet having releasability is provided with a coloring layer on the releasable surface, and an ionizing radiation shielding pattern is provided on either side of the sheet or on the coloring layer. Step of preparing a mask sheet.

(b) A step of preparing a composite transfer sheet in which the above mask sheet is superposed on the front surface side of a support sheet having an adhesive layer on the back surface with an ionizing radiation curable resin layer interposed.

(c) A step of adhering the composite transfer sheet to a decorative material substrate having a curved surface so as to follow the shape of the curved surface so that the adhesive layer side is in contact.

(d) A step of irradiating with ionizing radiation to cure the ionizing radiation-curable resin layer corresponding to the portion without the ionizing radiation shielding pattern.

(e) Peeling off the ionizing radiation transparent sheet to attach a part of the resin in the uncured portion of the ionizing radiation curable resin layer to the transparent sheet to form a recess and remove the cured ionizing radiation curable resin. A step of forming a convex portion made of resin.

[Action]

According to the present invention, a composite transfer sheet having an ionizing radiation-curable resin layer supported by a supporting sheet is closely adhered to a cosmetic material substrate having a curved surface, and the composite transfer sheet is overlapped and irradiated with ionizing radiation. The ionizing radiation curable resin layer is not cured in the portion having the shielding pattern and is removed by peeling the ionizing radiation transparent sheet, and the ionizing radiation curable resin remains cured in the portion having no shielding pattern. As a result, it is possible to obtain a decorative material in which an uneven pattern is surely provided at a predetermined position on the curved surface of the decorative material base material and the thickness of the uneven pattern is uniform as a whole even though it is a curved surface. Further, if a pattern layer or the like is formed on the transfer sheet side, a pattern layer or the like that is surely synchronized with the uneven pattern can be simultaneously provided on the substrate side.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 (a) to 1 (d) show an embodiment of the manufacturing method of the present invention. In the method of the present invention, first, a mask sheet 1 as illustrated in FIG. 1 (a) is prepared. This sheet 1 is composed of an ionizing radiation transparent sheet 2, an ionizing radiation shielding pattern 3, and a colored layer 4 provided as necessary.

Since the ionizing radiation shielding pattern 3 is for shielding ionizing radiation when it is irradiated with ionizing radiation, the forming position thereof is the upper surface or the lower surface of the ionizing radiation transparent sheet 2 in the drawing, or the colored layer. 4 may be the lower surface.

The ionizing radiation transparent sheet 2 generally has a thickness of 5 to 20.
It is composed of a sheet or film having an ionizing radiation transparency of about 0 μm, preferably about 25 to 100 μm. When the ionizing radiation is ultraviolet rays, for example, polyester, polyamide (nylon, etc.), polyolefins such as polypropylene and polyethylene, and fluororesins are used. Examples thereof include a sheet or a film, but those containing no pigment or the like having an influence on the ultraviolet transmittance are preferable. When the ionizing radiation is an electron beam, there is not much restriction because the electron beam has a high transparency, and the sheet or film having the property of transmitting the above-mentioned ultraviolet rays can be used in principle. It is also possible to use a resin extrusion coat or a resin coat such as silicone or melamine which has been subjected to a release treatment.

Further, the sheet 2 is particularly preferably flexible because a composite transfer sheet described later is superposed on the curved surface shape of the decorative material base material, and for example, polyethylene, polypropylene having a thickness of about 6 to 50 μm, Polyolefin such as polymethylpentene, polyethylene terephthalate,
Polyester such as polyethylene terephthalate-isophthalate copolymer, polyamide such as nylon, cellulose triacetate, polyacrylate, polyvinyl chloride, polyvinylidene fluoride, ethylene vinyl alcohol copolymer,
A film made of vinylon or the like, or a laminated film of two or more kinds of these is used. When the decorative material base material has a curved plate shape, it is preferable to use a thin sheet or a slightly extensible sheet material for the sheet 2 so that the sheet 2 can easily follow the curved surface shape. Further, when the transfer sheet is used by applying the OVL molding transfer method, it is desirable that the transfer sheet has thermoplasticity. For example, a film made of polyolefin, polyamide, vinylon, ethylene vinyl alcohol copolymer or the like, or two or more kinds thereof. Laminated film is used.

Since the above-mentioned sheet 2 supports the coloring layer 4 which is provided as necessary in a transferable manner, at least the surface on the side supporting the coloring layer needs to be a peelable surface having peelability, and the material itself has peelability. When it is not used, a resin or composition having releasability is applied and used as the surface releasability.

The colored layer 4 is for forming a colored layer on the decorative material substrate, is formed by using various paints or inks according to the application, and is ionizing radiation transparent. The colored layer 4 may be formed as a uniform so-called solid layer or may be provided in a pattern. In the present invention, a solid layer may be used because it can be patterned with an ionizing radiation shielding pattern, but a complicated pattern may be formed by printing, and in that case, the colored layer itself is not a solid layer but a pattern layer. May be. The pattern layer may be a print layer of one color or a print layer of two or more colors. The color of the colored layer can be any color such as colored transparent, matte transparent, and visible light concealing color, and in the case of a patterned colored layer, the pattern is wood, stone, letters, abstract pattern. Various things such as are applicable.
In the present invention, the colored layer 4 can be formed by using an ionizing radiation curable resin. In this case, the colored layer 4 is provided on the releasable surface of the sheet 2, and the ionizing radiation shielding pattern 3 is applied to the colored layer of the sheet 2. It is provided on the surface opposite to 4. When the colored layer is composed of an ionizing radiation curable resin, the curing time is preferably at the same time as the curing of the ionizing radiation curable resin layer described below at the time of transfer, but is not particularly limited to this time.

As a material for forming the ionizing radiation shielding pattern 3, when the ionizing radiation is ultraviolet rays, a substance that reflects and shields the ultraviolet rays, for example, a filler such as titanium oxide, potassium sulfate, calcium carbonate, or the like, has a particle size of 0.3. Ink containing a pigment having a large hiding power of about 10 μm, a substance that absorbs ultraviolet rays, for example, a benzophenol-based, salicylate-based, benzotriazole-based, acrylonitrile-based ultraviolet absorber, a light-absorbing pigment, carbon black or an inorganic substance An ink containing a quencher (for example, a metal complex salt type or a hindered amine type) is also included.
Further, when the ionizing radiation is an electron beam, the above inks and inks containing other pigments (preferably those having a high density such as metal) are included. The ionizing radiation shielding pattern 3 can be formed using these inks by a usual printing method such as gravure.

Next, the present invention prepares a composite transfer sheet 5 as illustrated in FIG. 1 (b). This composite transfer sheet 5 is obtained by applying the mask sheet 1 having the above-described structure to the front surface side of a support sheet 7 having an adhesive layer 6 on the back surface as shown in FIG. The ionizing radiation-curable resin layer 8 is superposed with the layer 8 interposed. The resin layer 8 is usually applied and formed on the support sheet 7 side. The above-mentioned superposition is performed by means such as forming the adhesive layer 8 on the support sheet 7 by roll coating or the like, and then laminating the mask sheet 1 via a nip roll.

The supporting sheet 7 plays a role of holding the ionizing radiation curable resin layer 8 with a uniform thickness, and its material is the same as that of the ionizing radiation transparent sheet 2 and is superposed on the curved surface shape of the decorative material base material. For the purpose of matching, it is preferably thin or slightly stretchable. Examples of the sheet 7 include plastic films such as polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyethylene terephthalate, polycarbonate, nylon, polystyrene, ethylene vinyl acetate copolymer, ethylene vinyl alcohol copolymer, and ionomer. In addition, papers and the like can be used. The thickness is preferably about 5 to 200 μm. The support sheet 7 may be colored, if necessary, or provided with a printing layer such as a pattern.

The adhesive layer 6 is for adhering the composite transfer sheet 5 to a decorative material substrate, and includes a heat-sensitive adhesive, a solvent-activated adhesive,
A known adhesive such as an ionizing radiation curable adhesive is selected and formed according to the application. This adhesive layer is formed by applying an adhesive to the support sheet using a known application means,
The thickness is preferably about 5 to 50 μm.

The ionizing radiation curable resin for forming the resin layer 8 is mainly composed of a polymer, an oligomer, a monomer or the like having a radical-polymerizable double bond in the structure, and requires a photopolymerization initiator, a sensitizer and others. Depending on the, it contains non-reactive polymer, organic solvent, wax and other additives, various grades are easily available from the market,
It can be used in the present invention. Ionizing radiation curable resin has a viscosity of 1
00 to 10,000 cps is preferable. The resin layer 8 can be formed by a known method such as gravure coating, roll coating, flow coating or spray coating. The thickness of the resin layer 8 is preferably 3 μm to 1 mm, and particularly preferably 30 to 200 μm.

Further, as the ionizing radiation curable resin constituting the resin layer 8, an adhesive resin is used. This adhesive ionizing radiation curable resin has an adhesive back to the adherend in the uncured state before irradiation with ionizing radiation, and firmly adheres to the adherend in the cured state after irradiation, but is not a mask sheet. It is made of a material having a peelable property. Specifically, it is composed of an ionizing radiation curable compound and a polymer mixed for imparting tackiness. The above compound contains a compound having at least one polymerizable double bond, preferably at least one acryloyl group or methacryloyl group, preferably at least two in the molecule, and, for example, 1,4-butylene glycol di (meth) acrylate, 1 , 6-hexaglycol di (meth)
Monomers such as acrylate, neopentyl glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, tetramethylolmethane tetra (meth) acrylate, epoxy acrylate, urethane modified acrylate, It contains oligomers such as oligoester acrylate. These may be used in combination of two or more if necessary. Examples of the tacky polymer include those having tackiness per se and those having the required tackiness when blended with the above compound. Examples of the former include (meth) acrylic acid alkyl ester polymers having an alkyl group having 1 to 12 carbon atoms, (meth) acrylic acid alkyl ester and (meth) acrylic acid, 2-hydroxyethyl (meth) acrylate, and dimethyl. Copolymers with unsaturated compounds such as aminoethyl (meth) acrylate, styrene, vinyl acetate, (meth) acrylonitrile (including polymers crosslinked using a crosslinking agent), or styrene-isoprene-styrene block copolymers Examples thereof include rubber-based adhesive substances mainly composed of rubbers such as rubber, styrene-butadiene rubber and nitrile-butadiene rubber. In addition, examples of the latter include saturated or unsaturated polyester resins and polybutyral resins.

The compounding ratio of the ionizing radiation curable compound and the adhesive polymer is 80:20 to 10:90, preferably 70: 3.
It is 0 to 30:70 (all are polymerization ratios). When the content of the above compound exceeds 80%, the cohesiveness in the uncured state before irradiation with ionizing radiation is poor, and it is not preferable because it may protrude to the side surface or accumulate in the lower part, and if it is less than 10%, sufficient curing can be obtained. It is not preferable because it does not exist. When the resin layer 8 is of an ultraviolet curing type, it is preferable to add a photosensitizer, and the photosensitizer is 0.05 to 20% by weight, preferably 0.5 to 20% by weight based on the total amount of the above compound and the adhesive polymer. -10
It is added in the range of weight%. Further, the resin layer 8 may be appropriately colored with a pigment or a dye as required.

When the adhesive ionizing radiation curable resin is used, the adhesive layer 6 in the composite transfer sheet 5 does not need to be provided on the back surface of the support sheet 7 in advance, and the mask sheet is provided via the resin layer 8 made of the above resin. It can be formed on the back surface side of the support sheet after stacking 1 and the support sheet 7.

Next, according to the method of the present invention, the composite transfer sheet 5 described above is adhered to the decorative material substrate 10 having the curved surface 9 so that the adhesive layer 6 contacts. At this time, the transfer sheet 5 is superposed and brought into close contact with the curved surface shape of the substrate 10 as shown in the figure. As a method of overlapping in such a state, a lapping method, a vacuum laminating method, a vacuum press laminating method, an OV
L molding transfer method (JP-A-54-1326751, etc.)
Etc. can be applied, and other means such as hand pasting means are also possible.

For example, the above-mentioned lapping method uses a plurality of pressing rolls each provided with a contact surface 11 matching each shape obtained by dividing the curved surface shape of the base material 10 into small units as shown in FIGS. 4 (a) to (c). The holding jigs 12x, 12y, 12 which are in charge of dividing the composite transfer sheet 5 in order of (a) to (c) of FIG.
Substrate 1 by pressing gradually in small areas by z
It is performed by adhering it in a state of completely following the curved surface of 0. The pressing roll serving as the pressing jig is preferably a low hardness rubber roll or the like. When superposing these, it is necessary to register the composite transfer sheet 5 and the base material 10 in each case, and to superimpose them in tune with each other.

The decorative material substrate 10 has a curved surface portion on at least a part of a surface to be provided with an uneven pattern according to the present invention. Any material may be used as the material of the base material 10, for example, a metal plate or molded product of stainless steel, steel, aluminum, copper or the like, glass, marble, ceramics, gypsum board, asbestos cement board, calcium silicate. Board, GRC
(Glass fiber reinforced cement) and other inorganic plates or molded products, polyester, melamine, polyvinyl chloride, diallyl phthalate and other organic polymer plates, molded products, wood,
Examples include wood-based boards or molded products such as plywood and particle board, and composites of the above materials. These decorative material base materials 10 may be subjected to a base treatment such as a sealing treatment or a primer treatment, a treatment for improving adhesiveness, and the like. Further, the base material 10 may be provided with a coloring layer, a pattern layer, and a metal vapor deposition layer as necessary, or a pattern printing sheet or an embossed pattern printing sheet may be laminated with an adhesive.

As a method for imparting a desired unevenness or the like to the base material 10, hot embossing (application material: plastic film plate, etc.), a method of curing after pressing with a mold at a soft stage in the production of the base material (application material) : Inorganic board, plastic board, etc., cutting (Applicable materials: Wood board,
Inorganic plates, plastic plates, etc.), mechanical embossing (applicable materials: metal plates, wood plates, etc.), casting molding method using a film for shaping uneven shapes, etc. can be adopted.

After the composite transfer sheet 5 is adhered to the base material 10, ionizing radiation is applied.
Irradiate 13 (Fig. 1 (c)). Typical examples of the ionizing radiation 13 are ultraviolet rays and electron beams, but other ones can be used as long as they have an energy quantum sufficient for polymerizing and crosslinking molecules.

Since this irradiation is performed on a substrate having a complicated curved surface or shape, it is preferable to appropriately distribute a plurality of irradiation devices and perform the irradiation from each direction. By this irradiation, the ionizing radiation-curable resin layer 8 is hardened in a portion without the ionizing radiation shielding pattern 3 and is integrated with the base material 10 together with the support sheet and the like, while the resin layer 8 is not formed in the portion with the shielding pattern 3. It is left to cure. On this occasion,
When the colored layer 4 is formed of an ionizing radiation curable resin, only the colored layer portion corresponding to the portion without the shielding pattern 3 is cured.

After the irradiation with the ionizing radiation, the ionizing radiation permeable sheet 2 is peeled off as shown in FIG. 1 (d). As a result, the cured and integrated portion is transferred and remains on the base material 10 side, and the uncured ionizing radiation curable resin 8a is uncured in one uncured portion.
Is removed while being attached to the sheet 2. As a result, a small amount of uncured ionizing radiation curable resin 8 as shown
A concavo-convex pattern is formed by the concave portions 14 in which a remains and the convex portions 15 made of the cured ionizing radiation curable resin 8b.

Through the above steps, the decorative material 16 having an uneven pattern is basically obtained by the method of the present invention.

In the present invention, after the sheet 2 is peeled off, the uncured resin 8a remaining in the recesses 14 is irradiated with ionizing radiation to be cured, and a protective layer 17 made of a transparent or translucent synthetic resin is formed by coating on the uneven surface. Alternatively (FIG. 2). The material of the resin is appropriately selected according to the required surface physical properties, but particularly when abrasion resistance and stain resistance are required, urethane acrylate, polyester acrylate, ionizing radiation curable resin made of epoxy acrylate, epoxy, Thermosetting resins such as polyurethane and polysiloxane, and fluororesins such as polytetrafluoroethylene and polyvinylidene fluoride can be mentioned. When weather resistance is required, polytetrafluoroethylene, polyvinylidene fluoride, etc. Fluorine resin, acrylic resin such as polymethylmethacrylate, polysiloxane resin and the like. Moreover, you may add a coloring agent, a matting agent, etc. as needed. This protective layer can be formed by applying a transparent synthetic resin paint, or may be formed by heat-sealing or adhering a transparent synthetic resin film.

In the present invention, after the sheet 2 is peeled off, a predetermined amount of the uncured resin 8a remaining in the recess 14 is removed to form a deeper recess 14a, and then the remaining resin may be cured (third embodiment).
Figure). Further, after the entire surface is coated with the coloring ink on the uneven surface including the deep concave portion 14a, the coloring ink adhering to the portions other than the concave portion 14 may be removed, so that only the colored ink 18 in the concave portion 14 may be applied. (Fig. 4). Moreover, after only the concave portion is colored with the coloring ink 18, the protective layer 17 may be formed on the entire surface thereof in the same manner as described above, as shown in FIG.

As a method for removing the remaining uncured resin 8a, for example, it is preferable to use a removing device in which a plurality of brushing rolls are installed by adjusting the angle of the rotation axis stepwise according to the curved surface shape of the base material. As a method for applying the colored ink only to the concave portions, for example, after the colored ink is applied over the entire surface by a roll coating method, a flow coating method, a spray coating method or the like, a contact surface that matches the curved surface shape of the base material 10 is provided. It is possible to adopt a method of scraping off the ink at unnecessary portions by sliding the surface of the base material by using an appropriate number of doctor blades, rotating rolls and the like.

Hereinafter, the present invention will be described in more detail with reference to specific examples.

Example 1 A colored pearl ink (manufactured by Morohoshi Ink Co., Ltd.) was dried by gravure printing on one surface of a polyester film (manufactured by Toray Co., Ltd.) having a releasability of 50 μm to have a thickness of 3 μm.
Then, a solid pattern was printed so as to obtain the following pattern, and an ultraviolet-shielding ink (manufactured by Morohoshi Ink Co., Ltd.) was used to print an abstract pattern using a white plate having a plate depth of 60 μm to prepare a mask sheet.

On the other hand, a 50 μm thick white vinyl chloride film (made by Riken Vinyl) is coated with vinyl acetate adhesive (made by Konishi) on one side by roll coating, and on the other side, an adhesive UV-curable coating having the following composition is formed. Was 60 μm.

Polyester resin (Byron Co., Ltd. Byron) 35 parts by weight Epoxy acrylate (Showa Polymer Co., Ltd. Lipoxy SP) 70 parts by weight Vinyl acetate resin 10 parts by weight Benzophenone (Nippon Kayaku Co., Ltd. KAYACURE BP) 10 parts by weight Part Hydroquinone 0.01 part by weight The above-mentioned mask sheet was superposed on the coated surface so that the printed surface was in contact with the coated surface to prepare a composite transfer sheet.

This composite transfer sheet was adhered to an ABS resin base material having a curved surface shape by following the curved surface shape by a lapping method. In this case, the lapping method is performed by appropriately disposing a plurality of pressing rolls each having a contact surface corresponding to each unit shape obtained by dividing the curved surface shape of the base material into small units, and by the pressing rolls, the transfer sheet is divided into small areas. It was performed by pressing in stages.

The lapped laminate was placed in an irradiation device equipped with five ozoneless type ultraviolet lamps with an output of 80 W / cm.
After passing at a speed of m / min, the polyester film was peeled off.

After that, an ultraviolet curable coating material was applied to the entire surface by spray coating so that the thickness was 5 μm, and passed through the same ultraviolet irradiation device as described above to obtain a decorative material.

The obtained decorative material was rich in three-dimensional design, the colored pearl ink layer and the concavo-convex shape were in synchronization, and the applied film thickness was uniform throughout.

Example 2 Transparent vinyl chloride film (manufactured by Riken Vinyl, thickness 50 μm
m) is printed with a woodgrain pattern using gravure ink (made by Morohoshi Ink), and the same adhesive UV-curable coating material as in Example 1 is roll-coated on the printed surface to a thickness of 60 μm, and the coated surface Then, a 38 μm-thick polyester film having releasability was overlaid with a mask sheet having a wood grain conduit pattern printed with black ink (Morohoshi Ink Co., Ltd.) having an ultraviolet shielding property to prepare a composite transfer sheet.

An adhesive similar to that used in Example 1 was applied to the vinyl chloride film surface of the above transfer sheet, and then it was adhered to a wooden curved substrate by lapping according to the same principle as Example 1. Then, the polyester film was peeled off by irradiating ultraviolet rays under the same conditions as in Example 1.

Then, a solvent was applied to the uneven surface and buffing was performed with a brushing roll to remove the uncured resin remaining in the recess. After that, a dark brown ink was embedded in the recesses using a profile roll, the ink adhering to the areas other than the recesses was scraped off using a profile sander roll, and then the UV curable coating material was applied to the entire surface in the same manner as in Example 1 and the same irradiation device was used. The inside was passed under the same conditions to obtain a decorative material.

The obtained decorative material had a wood grain pattern and a concavo-convex shape of the conduit in synchronism with each other, and had a realistic three-dimensional design like natural wood.

〔The invention's effect〕

As described above, according to the production method of the present invention, it is possible to easily and surely provide a desired uneven pattern, even though the decorative material base material has a curved surface. This can be achieved by bringing the composite transfer sheet into close contact with the curved base material by a lapping method or the like so as to follow the curved shape. Further, in the present invention, the uneven transfer pattern is formed by using the composite transfer sheet in which the ionizing radiation-curable resin layer is supported by the mask sheet and the support sheet like the sandwich structure as described above. The uneven pattern can be formed with a different film thickness (excluding the film thickness difference between the convex portion and the concave portion). That is, when the ionizing radiation-curable resin layer is formed by coating on the curved base material side, it is easy to stay in a lower portion such as a concave portion depending on the material of the resin and the like, and thus the coating film thickness varies between the lower portion and the higher portion. Although the film thickness of the uneven pattern tends to be non-uniform, the present invention can solve this problem. Further, by forming a pattern layer or the like on the transfer sheet side (ionizing radiation permeable sheet or support sheet), a concavo-convex pattern in which the concavo-convex pattern and the pattern layer are perfectly synchronized can be formed on the substrate.

Therefore, according to the present invention, it is possible to easily and reliably manufacture a decorative material having a beautiful three-dimensional effect and a beautiful uneven pattern.

In addition, the adhesive sheet in the composite transfer sheet is formed after the mask sheet and the supporting sheet are superposed by using the adhesive ionizing radiation curable resin, so that the mask sheet and the supporting sheet can be formed without any trouble due to the adhesive layer. Have the advantage that they can be overlaid.

[Brief description of drawings]

1 (a) to 1 (d) are process explanatory views showing an embodiment of the production method of the present invention, and FIGS. 2, 3, and 4 show other examples of the decorative material obtained by the present invention. Sectional views and FIGS. 5A to 5C are explanatory views showing an example of the lapping method. DESCRIPTION OF SYMBOLS 1 ... Mask sheet 2 ... Ionizing radiation transparent sheet 3 ... Ionizing radiation shielding pattern 5 ... Composite transfer sheet, 6 ... Adhesive layer 7 ... Support sheet 8 ... Ionizing radiation curable resin layer 9 ... Curved surface, 10 ... Cosmetic material Substrate 13 ... Ionizing radiation, 14 ... Recessed portion, 15 ... Convex portion 17 ... Protective layer, 11 ... Colored ink

Claims (7)

[Claims] 1. A method for producing a decorative material having an uneven pattern, which comprises sequentially performing the following steps (a) to (e). (a) the surface of the ionizing radiation permeable sheet having releasability is provided with a coloring layer on the releasable surface, and an ionizing radiation shielding pattern is provided on either side of the sheet or on the coloring layer. Step of preparing a mask sheet. (b) A step of preparing a composite transfer sheet in which the above mask sheet is superposed on the front surface side of a support sheet having an adhesive layer on the back surface with an ionizing radiation curable resin layer interposed. (c) A step of adhering the composite transfer sheet to a decorative material substrate having a curved surface so as to follow the shape of the curved surface so that the adhesive layer side is in contact. (d) A step of irradiating with ionizing radiation to cure the ionizing radiation-curable resin layer corresponding to the portion without the ionizing radiation shielding pattern. (e) Peeling off the ionizing radiation transparent sheet to attach a part of the resin in the uncured portion of the ionizing radiation curable resin layer to the transparent sheet to form a recess and remove the cured ionizing radiation curable resin. A step of forming a convex portion made of resin. 2. The method for producing a decorative material having an uneven pattern according to claim 1, wherein an adhesive ionizing radiation curable resin is used as the resin material for forming the ionizing radiation curable resin layer in the step (b). 3. The concavo-convex pattern according to claim 2, wherein an adhesive layer is formed on the back surface of the support sheet after the mask sheet and the support sheet are superposed on each other with a resin layer made of an adhesive ionizing radiation curable resin interposed therebetween. Of manufacturing a cosmetic material having 4. The uneven pattern according to claim 1, wherein after the sheet is peeled off in the step (e), the uncured ionizing radiation curable resin remaining in the recesses is cured by irradiation with ionizing radiation. A method for manufacturing a decorative material. 5. The uncured ionizing radiation-curable resin remaining in the recesses is removed after the sheet is peeled off in step (e).
A method for producing a decorative material having an uneven pattern according to any one of 1. 6. The unevenness according to any one of claims 1 to 5, wherein after the entire surface of the obtained uneven surface is coated with the coloring ink, the ink adhering to the areas other than the concave areas is removed and the remaining ink is applied only to the concave areas. A method for producing a decorative material having a pattern. 7. The method for producing a decorative material having an uneven pattern according to claim 1, wherein a protective layer made of a transparent or semitransparent synthetic resin is formed on the obtained uneven surface.