JPH11334296A - Method and apparatus for transferring to curved surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a transference product having fine surface decoration by giving even and appropriate compression in performing transfer by the use of the collision pressure of solid particles. SOLUTION: In the transfer method, the transfer layer side of a transfer sheet S comprising a support and a transfer layer is opposed to the irregular surface side of a transferring base material B having an irregular surface, and solid particles P is caused to be in collision with the support body side of the transfer sheet, so that the transfer sheet is brought in press-contact with the irregular surface of the transferred base material. In this case, an acceleration of the solid particles to be in collision with the transfer sheet is implemented by means of an exhaust unit with an impeller having a rotation shaft intersecting at right angles to the transportation direction of the transfer sheet. By using only one exhaust unit, uniform transfer pressure is applied on an overall breadth of the wide transfer sheet and transferred base material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative material for exterior and interior materials of a house, furniture, home electric appliances and the like, and more particularly to a method of transferring a curved surface and a curved surface for producing a decorative material having a decorative uneven surface. The present invention relates to a transfer device.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 9-315095 discloses a method for obtaining a decorative material having a large three-dimensional uneven surface among such decorative materials having an uneven surface. Technology has been proposed. That is, the transfer layer side of the transfer sheet including the support and the transfer layer is opposed to the uneven surface of the base material to be transferred, and solid particles are sprayed and collided against the support side of the transfer sheet, and the collision pressure of the solid particles is increased. U.S. Pat. No. 6,064,067 discloses a transfer sheet that can be pressed and adhered to a transfer sheet so as to follow the unevenness of the surface of the base material.

[0003]

In the curved surface transfer method described in the prior art, a nozzle is used as a means for ejecting solid particles, and the solid particles are ejected from the nozzle together with an air flow. However, when a nozzle is used as the jetting means, the width (area) of the region to which the transfer pressure can be applied is narrow, so that it is not possible to apply the nozzle alone to a wide transfer sheet and a substrate to be transferred. For this reason, for wide width,
Although a method of arranging a plurality of nozzles has been proposed, the apparatus becomes complicated, and the pressure distribution near the boundary of the pressurized area of each nozzle is too high or too low, resulting in uneven pressure distribution in the width direction. There is a problem that it becomes. Further, it is conceivable to form the nozzle with a wide width (T-die shape or fish tail shape), but in this case, the pressure itself is diffused and decreases.

The present invention has been made in view of the above background, and an object thereof is to provide a uniform and appropriate pressing force when performing transfer using solid particle collision pressure. Accordingly, it is an object of the present invention to provide a curved surface transfer method and a curved surface transfer device which can obtain a transfer product having excellent surface decoration.

[0005]

In order to solve the above-mentioned problems, a curved surface transfer method according to the present invention is directed to a transfer method comprising a support and a transfer layer on an uneven surface side of a transfer-receiving substrate having an uneven surface. The transfer layer side of the sheet is opposed, solid particles collide against the support side of the transfer sheet, and the transfer sheet is pressed against the uneven surface of the substrate to be transferred by the collision pressure to adhere the transfer layer to the substrate to be transferred. Then, by peeling and removing the support of the transfer sheet, in the curved surface transfer method of transferring the transfer layer to the substrate to be transferred, the acceleration of the solid particles colliding with the transfer sheet,
It is performed by an ejector using an impeller having a rotation axis orthogonal to the transfer sheet conveying direction.

In the curved transfer apparatus according to the present invention, the transfer layer side of the transfer sheet comprising the support and the transfer layer is opposed to the uneven surface side of the transfer-receiving substrate having the uneven surface. After the solid particles collide against the support, the transfer pressure is pressed against the uneven surface of the transfer substrate by the collision pressure to adhere the transfer layer to the transfer substrate, and then the transfer sheet support is peeled off. An apparatus for performing a method of transferring a transfer layer to a substrate to be transferred, the apparatus comprising solid particle ejection means for ejecting accelerated solid particles, and the collision pressure of the solid particles ejected from the ejection means. To the transfer sheet, pressing means for pressing the transfer sheet against the transfer substrate, substrate transfer means for transporting the transfer substrate at least to a position facing the jetting means, the transfer sheet, at least Jetting means and transfer A sheet conveying means for supplying the solid particles to the transfer material, wherein the solid particle ejecting means comprises an ejector using an impeller having a rotation axis orthogonal to the transfer sheet conveying direction. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the curved surface transfer device of the present invention will be described below.

[Substrate to be Transferred] The substrate to be used in the present invention may of course have a flat surface to be transferred. However, the present invention shows its true value only when the surface to be transferred has an uneven surface. In particular, the substrate to be transferred has three-dimensional irregularities. A conventional pressing jig (see Japanese Patent Publication No. 61-5895 described above) and a transfer roller made of rubber (see Japanese Patent Application Laid-Open No. Hei 5-13997 described above) essentially have the directionality of the rotating shaft. , The applicable surface irregularities are limited. That is, the former is limited to two-dimensional unevenness having a curvature only in one axis direction, and the latter is capable of transferring to a three-dimensional unevenness having a curvature in two axis directions even if the three-dimensional shape is possible in any direction. Cannot be applied homogeneously. For example, unless the longitudinal direction of the wood grain conduit pattern is parallel to the feed direction of the transfer sheet, it cannot be successfully transferred to the concave portion of the conduit. In addition, the latter is practically limited to a flat base material, and otherwise cannot be used unless a specially shaped transfer roller is used for each base material shape.

However, in the present invention, as will be described later, since the collision pressure of a group of solid particles that behave fluidly is used, the planar direction of the pressure application region is essentially required for the three-dimensional shape of the surface irregularities. Do not have. (This directionality is the direction of the temporal position change of a point on the transfer-receiving substrate to which pressure is applied.) Therefore, a shape having irregularities in the transfer direction of the transfer sheet or the transfer-receiving substrate is considered. The substrate to be transferred may be used. In other words, it means that the present invention can be applied to two-dimensional unevenness having unevenness only in one direction such as only the feed direction or width direction, and three-dimensional unevenness having unevenness in two directions such as both the feed direction and the width direction. The point that the collision pressure of the solid particle group does not have directionality is that the ejector that ejects the solid particles is placed so that the single-sheet transfer sheet is placed on the substrate to be transferred and pressed into contact one by one. This can be easily understood by considering how the area to which the collision pressure is applied moves by moving or transferring the transfer sheet and the base material to be transferred while fixing the ejector.

The substrate to be transferred is not limited to a flat plate material (having an envelope shape) as a whole, but may be a substrate having two-dimensional irregularities that are convex or concave in an arc shape and are curved in the feeding direction or width direction. Alternatively, the curved surface may have finer three-dimensional surface irregularities. In the present invention, whether to transfer the two-dimensional irregularities having an arc-shaped cross section of the base material to be transferred, for example, in the width direction or in the feed direction is arbitrary in consideration of workability and the like. Can be.

It is also possible to use a substrate to be transferred having an uneven surface having fine irregularities superimposed on large irregularities, or a substrate having a surface to be transferred to the bottom of the concave portion or the inner surface of the concave portion of the irregular surface. . The large irregularities and the fine irregularities are, for example, as shown in an enlarged perspective view of a main part of FIG. The unevenness of the large pattern is composed of the unevenness 403, the unevenness of the large pattern is 1 to 10 mm, the width of the concave portion is 1 to 10 mm, and the width of the convex portion is 5 mm or more. Both the step and the width are smaller than the large uneven shape, specifically, the step is about 0.1 to 5 mm, the width of the concave portion and the width of the convex portion are 0.1 mm or more, and the width of the convex portion of the large uneven shape is It is less than 1/2.

As a specific example of an uneven pattern of a decorative material which is formed of a combination of large and small irregularities and fine irregularities and has three-dimensional surface irregularities, for example, there are joints and grooves as large irregularities. It has a two-dimensional array pattern of tiles, bricks, stones, etc., and has fine irregularities on the spray painted surface such as stucco, lysine etc., unevenness of stone surface such as granite cleavage surface and travertine marble board Joints, grooves, as a stone-grained uneven pattern having a large pattern, etc.
It has a siding pattern, shaved wood pattern, and a floating wood grain pattern, and a conduit groove as fine irregularities on it, a raised annual ring,
Wood-grain uneven patterns having a hairline or the like can be given.

Each of the surfaces constituting the concave-convex surface is arbitrary, such as only a plane, only a curved surface, or a combination of a plane and a curved surface. Therefore, the curved surface on the substrate to be transferred according to the present invention also means an uneven surface having no curved surface composed of only a plurality of planes, such as a tooth profile of a clog. Further, the curvature referred to in the present invention is:
The case of an infinite curvature (curvature radius = 0) that is angular like a periphery of a side or a vertex of a cube is also included. In addition, in order to make the surface of the transfer-receiving substrate have desired irregularities, press working, embossing, extrusion, cutting, molding, or the like may be used.

The material of the substrate to be transferred is arbitrary.
If it is a board material, non-porcelain ceramic boards such as calcium silicate board, extruded cement board, slag cement board, ALC (lightweight foamed concrete) board, GRC (glass fiber reinforced concrete) board, pulp cement board, cedar, cypress, Wood veneer and plywood made of various tree species such as pine, lauan, teak,
Particle board, glued lumber, wood medium density fiberboard (MD
F) and the like, a metal plate such as iron, aluminum, and copper, ceramics such as ceramics and glass, and resin molded products such as polypropylene, ABS resin, and phenol resin.

Further, an easy-adhesion primer for assisting the adhesion with the adhesive or a sealer for sealing and sealing fine irregularities and porosity on the surface is applied to the surface of the substrate to be transferred in advance. You may keep it. A resin such as an isocyanate, a two-part curable urethane resin, an epoxy resin, an acrylic resin, or a vinyl acetate resin is applied as an easy-adhesion primer or a sealer.

[Transfer Sheet] The transfer sheet is composed of a support and a transfer layer that transfers and transfers. The transfer layer comprises at least a decorative layer. Further, the adhesive may be formed on the transfer sheet as an adhesive layer that becomes a part of the transfer layer.
In addition, in order to facilitate the removal of air trapped between the surface of the substrate to be transferred and the transfer sheet, a large number of small holes are formed in the entire surface of the transfer sheet as necessary to penetrate the entire layer of the transfer sheet. You may.

(Support) As a support of the transfer sheet,
If the substrate to be transferred is a two-dimensional uneven surface, paper without stretchability is also possible, but in order to apply the present invention to a three-dimensional uneven surface that demonstrates its true value, at least at the time of transfer, a stretchable support is required. Use the body. Due to the extensibility, the transfer sheet can adhere to and transfer to the inside of the concave portion on the surface of the substrate to be transferred when the collision pressure of the solid particles is applied. The stretchability of the entire transfer sheet is mainly governed by the stretchability of the support. Therefore, in addition to a conventionally known thermoplastic resin film, a rubber film that can be stretched even at normal temperature can be used as the support. In the case of a thermoplastic resin film, there is almost no stretchability when a transfer layer such as a decorative layer is formed, and at the time of transfer, sufficient stretchability is developed by heating, and after cooling, the deformed shape is maintained,
As a transfer sheet that does not restore its shape due to elasticity, a transfer sheet that can be used in the present invention can be easily prepared in the same manner as a conventionally known ordinary transfer sheet.

As a specific example of the support, from the viewpoint of stretchability,
Even a biaxially stretched polyethylene terephthalate film, which has been widely used, can express necessary and sufficient stretchability by setting heating conditions, collision pressure conditions, and the like depending on the surface unevenness, so that curved surface transfer is possible. However, preferred supports that easily exhibit stretchability at lower temperature and pressure are, for example, ethylene terephthalate / isophthalate copolymer polyester, thermoplastic polyester resin such as polybutylene terephthalate, polypropylene, polyethylene, polymethylpentene, Polyolefin resin such as ethylene-propylene-butene terpolymer, vinyl chloride resin, ethylene-vinyl acetate copolymer, ethylene-
Vinyl alcohol copolymer, acrylic resin, polyamide resin, or natural rubber, synthetic rubber, olefin-based thermoplastic elastomer, urethane-based thermoplastic elastomer, etc., alone or as a mixture, using a resin film with a single layer or different layers be able to. These resin films are preferably low stretched or unstretched. For example, specifically, a polypropylene-based thermoplastic elastomer film is one of the supports that are excellent in stretching properties, do not generate hydrochloric acid gas during waste combustion, and are environmentally friendly. The thickness of the support is
Usually, it is 20 to 200 μm.

If necessary, the support may be provided with a release layer on the transfer layer side to improve the releasability from the transfer layer. The release layer is removed together with the support from the transfer layer when the support is released. As the release layer, for example, a simple substance such as a silicone resin, a melamine resin, a polyamide resin, a urethane resin, a polyolefin resin, a wax, or a mixture containing these is used.

If an uneven pattern is provided on the surface of the support that is in contact with the transfer layer, the uneven pattern can be formed on the surface of the transfer layer after transfer. The uneven pattern is, for example,
There are hairline, line-shaped groove, uneven pattern of cleavage face of granite, wood grain conduit groove, wood grain ring pattern, cloth texture surface texture, skin squeezing, characters, geometric pattern and so on. The formation of the concavo-convex pattern is performed by embossing, sandblasting, or hairline processing the resin sheet of the support by hot pressing, or forming the ink (2) using a resin having a releasing property as a binder on the support. Liquid-cured urethane, silicone resin, melamine resin, polyfunctional acrylate or methacrylate monomer or prepolymer that crosslinks with ultraviolet light or electron beam, etc.). There is a method of providing a layer and forming a support having a shaping layer. The shaping layer has the function of the release layer.

(Transfer Layer) The transfer layer of the transfer sheet is composed of at least a decorative layer, and a release layer, an adhesive layer, etc. may also be a component of the transfer layer as appropriate. In the configuration having the adhesive layer, it is possible to omit applying the adhesive to one or both of the transfer sheet and the substrate to be transferred at the time of transfer.

The decorative layer is formed by printing a pattern or the like with a conventionally known method such as gravure printing, silk screen printing, offset printing, or the like, and a material such as aluminum, chromium, gold, or silver by a known vapor deposition method. A metal thin film layer or the like formed on the target or on the entire surface, which is used according to the application. As the pattern, according to the surface irregularities of the substrate to be transferred,
A wood pattern, a stone pattern, a cloth pattern, a tile pattern, a brick pattern, a leather pattern, a character, a geometric pattern, a solid pattern, and the like are used. The picture layer ink is composed of a vehicle such as a binder, a coloring agent such as a pigment or a dye, and various additives appropriately added thereto. A single material such as an acrylic resin, a vinyl chloride-vinyl acetate copolymer, a polyester resin, a cellulosic resin, a polyurethane resin, a fluororesin, or the like, or a mixture containing these is used for the binder. As the pigment of the colorant, inorganic pigments such as titanium white, carbon black, red iron oxide, graphite, and ultramarine blue, and organic pigments such as aniline black, quinacridone, isoindolinone, and phthalocyanine blue are used.

The release layer is provided between the support or the release layer and the decorative layer to adjust the releasability thereof and to protect the surface of the decorative layer after the transfer. This is the same as a conventionally known transfer sheet. For the release layer, for example, a resin or the like used as a binder for the picture layer ink is used. The release layer is transferred to the transfer-receiving substrate together with the decorative layer during transfer, and covers the surface of the decorative layer.

[Adhesive] The adhesive is used as an adhesive layer constituting a transfer layer of a transfer sheet or an adhesive layer on a substrate to be transferred.
Apply by online coating or offline coating before or immediately before transfer. When applied to a substrate to be transferred, the adhesive layer of the transfer sheet transfer layer can be omitted. The adhesive to be used may be appropriately selected depending on the application, required physical properties, and the like. When a liquid is used as the solid particle accelerating fluid, an adhesive that is insoluble in the liquid is selected.

As the adhesive, for example, a heat-sensitive adhesive,
Moisture-curable heat-sensitive adhesives, hot-melt adhesives, moisture-curable hot-melt adhesives, two-component curable adhesives, ionizing radiation-curable adhesives, water-based adhesives, or pressure-sensitive adhesives with adhesives Various adhesives can be used.

As the heat-sensitive adhesive, any of a heat-sealing adhesive using a thermoplastic resin and a thermosetting adhesive using a thermosetting resin can be used. However, from the point that bonding is completed in a short time, a heat-fusion type (heat-sensitive adhesive)
Is preferred. The adhesive may be diluted with a solvent or without a solvent, or may be a liquid or a solid at room temperature, and may be used as appropriate. In the case of an adhesive other than a pressure-sensitive adhesive exhibiting tackiness, a transfer layer can be formed with only a single adhesive layer. If a coloring agent such as a pigment is added to the adhesive layer, it can be said that the entire layer is a decorative layer composed of a solid ink layer. Examples of the heat-sensitive adhesive include polyvinyl acetate resin, vinyl chloride-vinyl acetate copolymer, acrylic resin, thermoplastic polyester resin, thermoplastic urethane resin, polyamide resin obtained by polycondensation of dimer acid and ethylenediamine, and the like. A conventionally known adhesive can be used. As the thermosetting adhesive, a phenol resin, a urea resin, a diallyl phthalate resin, a thermosetting urethane resin, an epoxy resin, or the like can be used.

The moisture-curable heat-sensitive adhesive is also a kind of heat-sensitive adhesive. The moisture-curable heat-sensitive adhesive is
Since the curing reaction proceeds with the moisture in the air when left naturally, it is applied immediately before transfer from the viewpoint of work stability. Immediately after transfer, the moisture-curable heat-sensitive adhesive has the same adhesive strength as a normal heat-melt adhesive, but the cross-linking / curing reaction gradually proceeds with moisture in the air due to natural standing. It is excellent in heat resistance without creep deformation and heat melting, and a large adhesive strength can be obtained. However, in order to promote crosslinking and curing of the adhesive by moisture after the transfer is completed, the decorative board after the transfer is left to cure in air containing moisture. Preferable atmospheric conditions for curing are generally a relative humidity of 50% RH or more and a temperature of 10%.
° C or higher. When the temperature and the relative humidity are both higher, the curing is completed in a shorter time. The standard curing completion time is usually about 10 hours in an atmosphere of 20 ° C. and 60% RH.

The moisture-curing heat-sensitive adhesive is a composition containing a prepolymer having an isocyanate group at a molecular terminal as an essential component. The prepolymer is usually a polyisocyanate prepolymer having one or more isocyanate groups at both molecular terminals, and is a solid thermoplastic resin at room temperature. Isocyanate groups react with each other due to moisture in the air to cause a chain extension reaction, and as a result, a reactant having a urea bond in a molecular chain is generated,
The urea bond further reacts with the isocyanate group at the molecular terminal to cause a biuret bond and branch to cause a crosslinking reaction.

The skeleton structure of the molecular chain of the prepolymer having an isocyanate group at the molecular terminal is arbitrary, and specific examples include a polyurethane skeleton having a urethane bond, a polyester skeleton having an ester bond, and a polybutazine skeleton. Adhesive properties can be adjusted by appropriately employing one or more of these skeletal structures. When a urethane bond is present in the molecular chain, the terminal isocyanate group also reacts with the urethane bond to generate an allophanate bond, which also causes a cross-linking reaction.

Specific examples of the polyisocyanate prepolymer include, for example, a polyol having an isocyanate group at a molecular terminal obtained by reacting an excess polyisocyanate with a polyol;
There is a urethane prepolymer having a polyurethane skeleton having a urethane bond in a molecular chain. Also, Japanese Unexamined Patent Publication No.
As disclosed in Japanese Patent No. 14287, a polyester skeleton and a polybutadiene skeleton obtained by adding a polyester polyol and a polyol having a polybutadiene skeleton in an arbitrary order to a polyisocyanate and subjecting them to an addition reaction are bonded by a urethane bond. Crystalline urethane prepolymer having a modified structure and having an isocyanate group at the molecular terminal, or a molecule obtained by reacting a polycarbonate-based polyol with a polyisocyanate as disclosed in JP-A-2-305882. 2 in
Examples include a polycarbonate-based urethane prepolymer having at least two isocyanate groups, and a polyester-based urethane prepolymer having two or more isocyanate groups in a molecule obtained by reacting a polyester-based polyol with a polyisocyanate.

In addition, the moisture-curable heat-sensitive adhesive includes:
In addition to the above-mentioned various polyisocyanate prepolymers, in order to adjust various physical properties, a thermoplastic resin, a tackifier, a plasticizer, a filler (an extender), a coloring pigment may be further added to the above-mentioned essential reaction components, if necessary. And various auxiliary materials such as a curing catalyst, a moisture removing agent, a storage stabilizer and an antioxidant.

The ionizing radiation-curable resin which can be used as the ionizing radiation-curable adhesive is a composition curable by ionizing radiation. Specifically, a radical polymerizable unsaturated bond or a cationic polymerizable A prepolymer (including a so-called oligomer) having a group and / or a composition which is appropriately mixed with a monomer and curable by ionizing radiation is preferably used. These prepolymers or monomers are used alone or as a mixture of two or more.

The above-mentioned prepolymer or monomer specifically has a radical polymerizable unsaturated group such as a (meth) acryloyl group and a (meth) acryloyloxy group, a cationic polymerizable functional group such as an epoxy group in the molecule. Consisting of a compound having Further, a polyene / thiol prepolymer based on a combination of a polyene and a polythiol is also preferably used. In addition, for example, a (meth) acryloyl group means an acryloyl group or a methacryloyl group.

Examples of the prepolymer having a radical polymerizable unsaturated group include polyester (meth) acrylate, urethane (meth) acrylate, epoxy (meth)
Acrylate, melamine (meth) acrylate, triazine (meth) acrylate and the like can be used. A molecular weight of about 250 to 100,000 is usually used.

Examples of the monomer having a radical polymerizable unsaturated group include monofunctional monomers such as methyl (meth)
Acrylate, 2-ethylhexyl (meth) acrylate, and the like. Further, as the polyfunctional monomer, there are trimethylpropane tri (meth) acrylate, trimethylolpropane ethylene oxide tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate and the like.

Examples of the prepolymer having a cationically polymerizable functional group include prepolymers of epoxy resins such as bisphenol epoxy resins and novolak epoxy compounds, and vinyl ether resins such as fatty acid vinyl ethers and aromatic vinyl ethers. .

Examples of thiols include polythiols such as trimethylolpropane trithioglycolate and pentaerythritol tetrathioglycolate. Examples of the polyene include those obtained by adding allyl alcohol to both ends of a polyurethane made of a diol and a diisocyanate.

When curing with ultraviolet light or visible light, a photopolymerization initiator is further added to the ionizing radiation-curable resin. In the case of a resin system having a radical polymerizable unsaturated group, acetophenones, benzophenones, thioxanthones, and benzoins can be used alone or in combination as a photopolymerization initiator. In the case of a resin having a cationically polymerizable functional group, an aromatic diazonium salt, an aromatic sulfonium salt, an aromatic iodonium salt, a metallocene compound, or the like can be used alone or as a mixture as a photopolymerization initiator. The addition amount of these photopolymerization initiators is about 0.1 to 10 parts by weight based on 100 parts by weight of the ionizing radiation-curable resin.

As the ionizing radiation, electromagnetic waves or charged particles having energy capable of crosslinking the molecules in the adhesive are used. Usually, ultraviolet rays or electron beams are used, but visible rays, X-rays, ion beams, or the like can also be used. As the ultraviolet light source, a light source such as a high-pressure mercury lamp, a low-pressure mercury lamp, a carbon arc lamp, and a black light is used. The wavelength of the ultraviolet light is usually 190
The wavelength range of ３380 nm is mainly used. As the electron beam source, various types of electron beam accelerators such as Cockcroft-Walton type, Van degraft type, resonance transformer type, insulating core transformer type, or linear type, dynamitron type, high frequency type, etc. are used, preferably 100 to 1000 keV, preferably. Is 100
A device that irradiates electrons having an energy of about 300 keV is used.

If necessary, a thermoplastic resin such as a vinyl chloride-vinyl acetate copolymer or an acrylic resin may be added to the ionizing radiation-curable resin. If used without adding a diluting solvent, it becomes a hot melt adhesive.

When an ionizing radiation-curable adhesive is used, an ionizing radiation irradiating device for irradiating an ultraviolet ray or an electron beam to a curved surface transfer device can be incorporated. The irradiation is performed during, after, or after and after the application of the collision pressure.

Further, various additives can be added to the various resins used for the adhesive, if necessary. These additives include, for example, extenders (fillers) composed of fine powders such as calcium carbonate, barium sulfate, silica, and alumina, and thixotropic agents such as organic bentonite (especially for transfer-receiving substrates having a large uneven step). In this case, the adhesive may be added to prevent the adhesive from flowing into the concave portion from the convex portion.).

To apply the adhesive to a sheet such as a transfer sheet or a substrate to be transferred, a solvent (or a dispersion medium) such as water or an organic solvent is used.
In the form of a solution (or dispersion) dissolved (or dispersed) in
Alternatively, a hot-melt thermoplastic composition or a room-temperature liquid uncured resin is applied in the form of a solvent-free resin liquid. As a coating method,
What is necessary is just to apply by the solution coating by gravure roll coat etc. which is a conventionally well-known coating method, or the melt coating (melt coating) method by an applicator etc. When used without adding a diluting solvent, solvent drying is unnecessary. For example, heat-sensitive adhesives can be used as solventless hot-melt adhesives, respectively. In addition, an ionizing radiation-curable adhesive or the like can be applied without a solvent. When used as a hot-melt adhesive, there is no solvent, so solvent drying is unnecessary even immediately before transfer, and high-speed production is possible. The amount of the adhesive applied varies depending on the composition of the adhesive, the type of the substrate to be transferred, and the surface state.
Usually, it is about 10 to ²⁰⁰ g / m ² (solid content).

It should be noted that a heat-sensitive adhesive is used as the adhesive,
The timing of heating to activate and heat-bond the adhesive may be before applying the collision pressure, during the application of the collision pressure, or before and during the application of the collision pressure. The heating of the adhesive is performed by heating the transfer sheet or the substrate to be transferred. The material to which the adhesive has been applied (the transfer sheet or the substrate to be transferred) may be heated, the material to which the adhesive is not applied may be heated, or both materials may be heated. Good. Also,
For the heating during the application of the collision pressure, heated solid particles or a fluid for accelerating the solid particles may be used as the heating fluid.

On the other hand, if the transfer sheet follows the surface shape of the substrate to be transferred and is formed, and the adhesive is sufficiently activated, cooling of the adhesive may be promoted by cooling means such as cold air. Cold air is blown from the transfer sheet side or the transfer-receiving substrate side. In addition, cooling solid particles and cooling fluid can also be used as cooling means. The promotion of cooling also prevents the transfer sheet formed following the inside of the concave portion of the concave-convex surface of the transfer-receiving substrate from returning to the case where there is a restoring force after releasing the collision pressure.

[Solid Particles] Solid particles include non-metallic inorganic particles such as glass beads, ceramic beads, calcium carbonate beads, alumina beads, zirconia beads, corundum beads, and alundum beads.
Iron or carbon steel, iron alloys such as stainless steel, aluminum, or aluminum alloys such as duralumin, titanium,
Metal particles such as metal beads such as zinc, or organic particles such as resin beads such as fluororesin beads, nylon beads, silicone resin beads, urethane resin beads, urea resin beads, phenol resin beads, crosslinked rubber beads, or metals And inorganic / resin composite particles composed of an inorganic particle and a resin. The shape is preferably spherical, but spheroidal, polyhedral, scaly, amorphous, and other shapes can also be used. The particle size of the solid particles is usually about 10 to 1000 μm.

The solid particles can also serve as a heating means and a cooling means. When heated solid particles are used, the activation of the adhesive by heating and the promotion of crosslinking and curing thereof, or the improvement of the stretchability by heating the transfer sheet can be performed together with the pressing of the transfer sheet. In this case, the transfer sheet and the substrate to be transferred may be heated to some extent by another heating method before the application of the collision pressure. The heated solid particles can also be used to maintain the temperature of the already heated transfer sheet, substrate to be transferred, and the like. On the other hand, for the purpose of promoting cooling after bonding, solid particles having a temperature lower than the temperature of the adhesive at the time of bonding can be used as the cooling solid particles. The solid particles may be used in combination with a part or all of the solid particles as heated solid particles or cooled solid particles, or after colliding heated solid particles with cooled solid particles. In addition, a transfer sheet, a substrate to be transferred, an adhesive or the like that needs to be heated by another heating method is sufficiently heated, and the molding, bonding and cooling of the transfer sheet are performed almost simultaneously using cooling solid particles. You can do it too.

In order to heat or cool the solid particles, when the solid particles are stored in a tank such as a hopper or the like, an electric heater provided in the tank or on the outer wall of the tank, a heating means using heated steam, a refrigerant, or a cooling means It should be done in. Further, these means may be provided on the outer wall of the solid particle transport tube to heat or cool the solid particle transport tube. Alternatively, when a fluid is used for accelerating the solid particles, the solid particles can be cooled or heated by heat conduction from the fluid using a cooled or heated fluid. In this case, by causing the fluid to collide with the transfer sheet, the fluid can be used as a heating or cooling unit together with the solid. Alternatively, in the case where the fluid is a liquid and a tank for storing solid particles together with the liquid is used, the solid particles and the liquid may be cooled or heated during storage.

[Application of Impact Pressure by Solid Particles] In order to strike the solid particles against the transfer sheet and apply the impact pressure to press the transfer sheet against the substrate to be transferred, a large number of solid particle ejecting means for ejecting the solid particles eject the solid particles. Are continuously ejected toward the transfer sheet to apply a collision pressure to the transfer sheet. As the solid particle ejecting means, an ejector using an impeller having a rotation axis orthogonal to the transfer sheet conveying direction is used.

[Ejector: Impeller] FIG. 1 is an explanatory view showing an example of an impeller that can be used as a particle accelerator of the ejector.
The impeller 30 is composed of a plurality of blades 301 and side plates 302 on both sides.
The rotating shaft 303 is provided on the side plate 302. The shape of the blade 301 is typically a rectangular flat plate as shown in FIG. 1. In addition, a curved curved plate, a propeller shape such as a screw propeller, or the like can be used. Select according to. The number of blades is selected from a plurality of blades, usually in a range of up to about ten blades. By adjusting the shape, the number, the rotation speed, and the supply speed and the supply direction of the solid particles of the impeller, the ejection direction, the ejection speed, the ejection diffusion angle, and the like of the accelerated solid particles are adjusted. Usually, solid particles are above (directly above or obliquely above) the particle accelerator.
Supplied from In addition, the direction in which the solid particles are ejected may be vertically downward as shown in FIG. 1, or may be horizontal, oblique, or the like.

Even if only one jetting device is used, the rotating shaft 303 of the impeller is arranged in a direction (width direction) orthogonal to the conveying direction of the transfer sheet S and the substrate B to be transferred, and the blade 301 The transfer pressure can be continuously applied over the entire width by covering the entire width of the transfer-receiving substrate B. Of course, if necessary, you can
Alternatively, a plurality may be arranged in the transport direction. Regarding the setting of the collision pressure, for example, the speed of the solid particles colliding with the transfer sheet is controlled by the number of revolutions of the impeller, or the number of solid particles to be supplied per unit time and the mass of one particle are controlled. Adjust by doing.

Further, solid particles ejected from the ejector are:
It is preferable to make the collision with the (total) transfer surface of the transfer substrate perpendicularly, because the collision pressure can be effectively used basically. Therefore, if the surface to be transferred of the substrate to be transferred is a convex surface such as, for example, a semi-cylindrical shape, a plurality of ejection guides are prepared for the convex surface, and a solid is substantially perpendicularly formed from the ejection guide to the surface to be transferred. The ejector may be arranged so that the particles collide.

The acceleration of solid particles by a particle accelerator
Although the ejection can be performed in a vacuum, it is preferable that the solid particles be ejected together with the airflow by rotating the impeller in the atmosphere and supplying the solid particles together with the air.

The dimensions of the impeller are usually about 5 to 50 cm in diameter, the width of the impeller in the rotation axis direction is about 10 to 200 cm, and the radial length of the impeller is about the diameter of the impeller.
The rotation speed of the impeller is about 50 to 5000 rpm. The ejection speed of the solid particles is about 10 to 60 m / s.

The material of the blades of the impeller may be appropriately selected from ceramics, metals such as steel, high chromium cast steel, titanium, and titanium alloy according to the type of solid particles. Solid particles are accelerated by contact with the blades, so when metal beads or inorganic particles are used for the solid particles, the particles are hard, so the blades should be made of high-chromium cast steel or ceramic with good wear resistance. . When resin beads are used as the solid particles, steel may be used because they are softer than metal particles.

Since the solid particles pass along the inner wall of the ejector, when metal beads or inorganic particles are used for the solid particles, the particles are hard. Good. When resin beads are used as the solid particles, stainless steel may be used because they are softer than metal particles.

[One Form of Continuous Transfer Using Chamber] When solid particles are actually used, it is preferable that the solid particles be recycled without being scattered in the surrounding atmosphere. Therefore, next, as one embodiment of the present invention, a curved surface transfer apparatus that performs continuous transfer while preventing scattering of solid particles and circulating reuse by using a chamber will be described with reference to FIG.

In the apparatus shown in the figure, a transfer-receiving substrate B having a plate-like, irregular surface with a flat envelope shape is used. This is an apparatus for transferring a decorative layer or the like with a continuous belt-shaped transfer sheet S while transporting it upward and horizontally. The solid particles P are ejected from the ejector 32 using an impeller in the chamber 33b toward the transfer sheet S to collide with the transfer sheet S, and give a collision pressure as a transfer pressure.

The chambers are divided into chambers 33a to 33c, which are separated from each other on the upper side of the substrate transfer device 11 except for the entrance of the transfer sheet and the substrate to be transferred, in this order from the entrance side of the transfer sheet and the substrate to be transferred. The chambers 33a to 33c are provided at a lower side of the substrate transport device 11.
A chamber 33d is provided as a common space below the base material transfer device corresponding to. The chambers 33d are upper chambers 33a to 33d on both sides in the width direction of the conveyor belt of the substrate transfer device.
33c. The chamber 33a is a heating chamber, the chamber 33b is a collision chamber, the chamber 33c is a post-processing chamber (cooling, removal of solid particles), and the lower chamber 33d is a common space but a solid particle collection chamber. It can also be said.

The first purpose of the chamber is to prevent the solid particles from leaking into the surrounding working atmosphere. For this reason, the chamber 33b, which is a collision chamber, particularly has an entrance / exit for the transfer sheet and the substrate to be transferred. Chamber 33 connected by
The air pressure is set lower than a and 33c. Hot air is blown from the hot air blowing nozzle 22 in the chamber 33a, and cool air is blown from the cold air blowing nozzle 24 in the chamber 33c.
a, lower than 33c. The chamber 33c
Although the solid particles fly inside by the removal of the solid particles by the rotating brush roller 35, the cold air blowing nozzle 2
4, the solid particles can be prevented from leaking from the outlet. The pressure inside the chamber 33b serving as the collision chamber is preferably set lower than the outside of the chamber in order to prevent the backflow of the solid particles from the chamber to the hopper. In order to adjust the pressure in the chamber, for example, an exhaust fan (not shown) may be appropriately connected to the chamber to exhaust the internal gas to the outside.

Next, transfer using the apparatus shown in FIG. 2 will be described.

First, the base material B to be transferred is placed on a base material transfer device 11 composed of an endless orbit type conveyor belt and transferred one by one. The transfer-receiving base material B is appropriately subjected to an adhesive coating, a base coating, or the like, as necessary, offline or inline. The adhesive is applied to a desired portion such as the entire surface or only the convex portion. If the adhesive or the like to be coated has a solvent component, the evaporated components are volatilized and dried from the viewpoint of explosion-proof measures in the chamber, and then are carried into the chamber.

On the other hand, the transfer sheet S is unwound from the unwinding roll 12 and first heated by a preheating roller 21 such as steam heating or induction heating. The transfer sheet is oriented such that the transfer layer faces the base material to be transferred. Thereafter, the transfer sheet passes through a guide roller, and is temporarily pressed by a temporary fixing roller 13 made of an elastic roller having a surface made of rubber to the transfer substrate by lightly pressing the transfer sheet. In the temporary fixing, the transfer sheet may be fixed only to a part of the convex portion or the like of the transfer-receiving substrate, and may not contact the inside of the concave portion or the like. When an adhesive is applied to the transfer sheet at the time of transfer, an adhesive application device (not shown) is provided between the transfer sheet and the preheating roller 21 to apply the adhesive. If solvent drying is required, a drying device (not shown) is provided before reaching the temporary fixing roller 13 to dry. Then, the transfer-receiving base material B, together with the temporarily fixed transfer sheet S, is first conveyed into a chamber 33a, which is a heating chamber, where the hot air blowing nozzle 2
The transfer sheet, the base material to be transferred (and the adhesive (layer)) are heated by the hot air Ah blown out from 2. As a result, the transfer sheet is heated and softened, and easily stretched when a collision pressure is applied. The adhesive is also heated and activated.

On the other hand, the particles heated by the particle heating device 23 in the hopper 31 are used as the solid particles P.
The particle heating device 23 heats the solid particles by blowing hot air Ah from an outlet of a conduit provided inside the hopper. The heated solid particles are supplied from a hopper 31 to an ejector 32 using an impeller, and are ejected toward a support of the transfer sheet S in a chamber 33b serving as a collision chamber. Then, the transfer sheet is exposed to collision of solid particles ejected from the ejector. The entire width of the base material to be transferred in the width direction is covered by the collision pressure application region by the ejector 32, and the transfer sheet S receives the collision pressure of the solid particles from the ejector 32. Then, as the transfer base material and the transfer sheet are conveyed, the entire region in the longitudinal direction is sequentially exposed to the collision pressure.
As a result, the transfer sheet is pressed against the transfer substrate by the solid particle collision pressure, and the transfer sheet is also extended and deformed into the concave portions of the concave and convex surface of the transfer substrate, whereby the irregularities of the transfer substrate are deformed. The transfer layer is molded following the surface shape, and the activated adhesive adheres to the transfer layer. Then, the transfer base material in close contact with the uneven surface on which the transfer sheet is to be transferred is transported to the next chamber 33c which is a post-processing chamber. In FIG. 2, for convenience of illustration, the hopper 31, the ejector 3
2. The chambers 33a, 33b, 33c, etc. are drawn so that the inside can be partially seen.

Some of the solid particles that have been subjected to the impact on the transfer sheet fall into the lower chamber 33d, bypassing both ends of the conveyor belt of the base material conveying device 11. Further, the remaining portion is transferred downstream while being placed on the transfer sheet support, and enters the next chamber 33c. Then, first, the solid particles are removed from the transfer sheet by the rotating brush roller 35. The rotating brush roller 35 may be one in which the hairs are evenly implanted on the entire surface, but desirably, one in which the hairs are implanted so as to form a right and left reverse spiral at the center in the width direction.
When such a brush roller is used, the solid particles are swept and collected from the center toward both ends of the transfer sheet by the rotating spiral, and fall. The pitch of the spiral may be set as appropriate. The length of the hair to be planted may be set as appropriate, but is usually about 5 to 20 mm. As the material of the hair, synthetic resin such as nylon, polypropylene, polyvinyl chloride, etc., animal hair such as pig, etc. are used. The rotational peripheral speed of the brush roller may be the same as, lower than, or higher than the transfer speed of the transfer sheet and the transfer-receiving substrate. These conditions are selected so that the efficiency of removing residual solid particles is optimized.

Thereafter, the slit-shaped cold air blowing nozzle 24
From above toward the transfer sheet and the substrate to be transferred
Then, air at room temperature or lower is blown to cool the substrate to be transferred and the transfer sheet to a temperature at which the support of the transfer sheet can be peeled off. The solid particles that have fallen into the chamber 33d are collected and collected by, for example, rubbing down the inclined bottom surface. The collected solid particles are transported to the original hopper 31 and reused. By continuously transporting on a conveyor or the like, it is possible to recycle in parallel with the application of the collision pressure. Here, the rotating brush roller 35 and the cool air blowing nozzle 24 constitute a residual solid particle removing unit.

Then, the adhered transfer substrate and the transfer sheet are forcibly cooled by the cold air blowing nozzle 24, and the remaining solid particles that can be blown off are also removed and discharged from the chamber 33c to the outside space. Then, the transfer sheet (support) is peeled off from the base material by the peeling roller 14. As a result, a transfer product such as a decorative material D in which a decorative layer or the like is transferred and formed as a transfer layer of the transfer sheet on the uneven surface of the base material to be transferred is obtained.

On the other hand, (the support of) the transfer sheet S after passing through the peeling roller 14 is still not removed by the rotating brush roller 35 and the cool air blowing nozzle 24 by the rotating spiral roller 36 as the residual solid particle removing means. After removing the solid particles that have partially adhered, the transfer sheet support is wound on a winding roll 1.
Collect in 5. The rotary spiral roller 36 is a roller having a spatula-shaped spiral blade made of plastic, hard rubber, metal, or the like that forms a left-right inverted spiral with respect to the center in the width direction. The rotating spiral blade lifts and removes the solid particles P that have entered the support or adhered by static electricity or the like. This is because the solid particles become foreign matters in order to reuse the support as a resource. The rotating brush roller 35
When the remaining solid particles can be completely removed only with the cold air blowing nozzle 24, the rotary spiral roller 36 can be omitted.

Next, the transfer surface of the substrate to be transferred after the support is peeled off is heated by the heating device 37. Due to this heating, the transfer layer (burr) extending outside the transfer-required area on the surface of the transfer-receiving base material or the recess in the transfer-required area in the recess does not reach the recess, and a bridge-like shape is formed immediately above the recess. The transfer layer (bridge) in the coated state is softened by heating and melt-bonded to the transfer-receiving substrate. When a thermosetting adhesive is used, the adhesive can be cured by heating here. As the heating device, an infrared radiation heater, a hot air blowing nozzle, a dielectric heating device, or the like is used.
This heating device is omitted when it is not necessary to treat burrs or bridges or to thermally cure the adhesive.

In the above description, it is assumed that the curing of the adhesive is completed off-line. However, after the transfer sheet is pressed, before or after the support is peeled off, a heating device or an ionizing radiation-curable resin is used. May be provided with an ionizing radiation irradiation device such as a mercury lamp (ultraviolet light source) and cured in-line.

[Others] Although the curved surface transfer apparatus of the present invention has been described above, the present invention is not limited to the above-described matters. For example, in the apparatus of FIG. 2, both the rotating brush roller 35 and the cool air blowing nozzle 24 downstream thereof are installed in this order as the residual solid particle removing means.
Conversely, a rotating brush roller 35 may be provided downstream of the cool air blowing nozzle 24. If the remaining solid particles can be completely removed only by the rotating brush roller 35 and the transfer sheet or the substrate to be transferred can be sufficiently cooled without spraying the cold air, the cooling air blowing nozzle 24 is used.
Can also be omitted. Of course, if unnecessary, the rotary spiral roller 36 may be omitted as described above. In the apparatus shown in FIG. 2, the transfer sheet is pressed against the transfer base material by using a continuous belt-shaped transfer sheet and a single-sheet transfer base material, and while conveying and moving the both integrally, a fixed ejector is used. In this mode, the transfer pressure of the transfer sheet against the substrate to be transferred is stopped only at that time, and the transfer sheet and the substrate to be transferred are intermittently performed for each substrate. (The ejector may be moved with respect to these, for example). Further, the transfer substrate and the transfer sheet may be supplied in the form of a single sheet.

The positional relationship between the direction in which the solid particles are ejected by the ejector and the transfer sheet and the substrate to be transferred is such that both are placed on a horizontal plane and eject solid particles vertically downward from above. Not limited. Even if the side of the transfer sheet support and the ejection direction maintain the vertical relationship, the transfer sheet placement or conveyance direction is not only in the horizontal plane, but also in the slope,
Even if the transfer sheet is in a vertical plane or the like, and the transfer sheet is in a horizontal plane, the solid particles may be ejected from the lower side of the support, that is, from below.

When the chamber is filled with an inert gas such as nitrogen to use an ionizing radiation curable resin as an adhesive or the like, it is necessary to prevent oxygen, water vapor and the like in the air from inhibiting the curing of the resin. May be prevented.

[Use of Transfer Product] The use of a transfer product such as a cosmetic material obtained by the present invention is performed by using a transferred decorative surface having an uneven surface,
In particular, it can be used for various applications such as an article having an uneven surface such as a three-dimensional shape. For example, as a cosmetic material, exterior walls such as siding, fences, roofs, gates, exteriors such as gable boards, wall surfaces,
Interior decoration of buildings such as ceilings and floors, window frames, doors, handrails, sills, surface decorations of fittings such as sills, furniture such as chests of drawers, surface decorations of cabinets of light electric / OA equipment such as television receivers, automobiles, It can be used in various fields such as vehicle interior materials such as trains and interior materials such as aircraft and ships. The decorative material is used as a decorative board or the like. In addition, the shape of the transfer product including the cosmetic material is arbitrary such as a flat plate, a curved plate, a rod-shaped body, and a three-dimensional object.

[Post-processing] In addition, a transparent protective layer may be further applied to the surface of a transferred product such as a cosmetic material after the transfer in order to impart durability, design feeling and the like. As such a transparent protective layer, one or more of a fluororesin such as polytetrafluoroethylene and polyvinylidene fluoride, an acrylic resin such as polymethyl methacrylate, a silicone resin and a urethane resin are used as a binder. UV absorbers such as benzotriazole and ultrafine cerium oxide, light stabilizers such as hindered amine radical scavengers, lubricating agents such as silica and spherical α-alumina, coloring pigments, extender pigments, lubricants Use a paint to which is added. Also,
For exterior use, inorganic paints can also be used. Coating is performed by spray coating, flow coating, roll coating using a soft rubber roll or sponge roll, or the like. The thickness of the transparent protective layer is about 1 to 100 μm.

[0076]

Next, embodiments of the present invention will be described.

First, a plate as illustrated in the plan view of FIG. 3A and the enlarged perspective view of the main part of FIG. 3B was prepared as a transfer substrate B having three-dimensional surface irregularities. The transfer-receiving substrate B has large grooved recesses 401 of joints having a depth of 2 mm and an opening width of 7 mm as a large pattern, and a flat (meaning that the envelope surface is flat) convex portion 402 having a brickwork pattern. It has a matte-tone fine unevenness 403 distributed in the range of 0.1 to 0.5 mm on the flat convex portion as a large unevenness, and a three-dimensional pattern in which these large pattern unevenness and the fine unevenness are superimposed. It is a 12 mm-thick calcium silicate plate having surface irregularities.
Then, a base coat and an undercoat were applied to the uneven surface, and an adhesive was further applied thereon in an off-line manner. As the adhesive, a moisture-curable heat-melt adhesive, which is a urethane-based adhesive, was applied as a reactive heat-melt adhesive at a rate of 30 g / m ² .

The transfer sheet has a thickness of 100
A polypropylene-based thermoplastic elastomer film composed of a μm ethylene-propylene-butene terpolymer (propylene content: 90% by weight) was used.
A decorative layer serving as a transfer layer was prepared by sequentially gravure-printing a brick-like pattern having cement joints aligned with the uneven surface shape of the base material B to be transferred. As the resin of the binder of the picture ink, a mixture of an acrylic resin and a vinyl chloride-vinyl acetate copolymer at a ratio of 8: 2 (weight ratio) is used. As the coloring pigment, red-bodied pattern, isoindolinone, carbon black, Titanium white was used.

In the present embodiment, a curved surface transfer device using an impeller as shown in FIG. 1 is used as an ejector in the device as shown in FIG. Transporting device 11 composed of a conveyor belt as a substrate transporting means
It was placed on top and transported. Then, after the transfer sheet S unwound from the unwind roll 12 serving as the sheet conveying means is preheated by the heating roller 21, the transfer sheet S is temporarily fixed by being pressed against the transfer substrate by the temporary fixing roller 13 made of a rubber roller. Was supplied integrally with the substrate to be transferred. First chamber 33
Within a, the transfer sheet was preheated, the adhesive was activated, and the substrate to be transferred was heated with hot air Ah from the hot air blowing nozzle 22. At that time, the surface temperature of the support of the transfer sheet was adjusted to 100 ° C.

Next, the average particle diameter of the solid particles P is set to 0.1.
A spherical zinc ball of 4 mm is heated at 100 ° C. inside the hopper 31.
The transfer sheet was ejected from the ejector 32 to collide against the support side of the transfer sheet from the front, rear, left and right directions, and pressed the transfer sheet against the base material to be transferred. The rotation speed of the impeller of each ejector is 360
At 0 rpm, the ejection speed of the solid particles was 35 m / s.
Pressing means is constituted by these ejectors, hoppers and the like.
Then, the transfer sheet is extended into the concave portion of the joint and thermally fused, and in the chamber 33c next to the chamber 33b, the solid particles remaining on the transfer sheet by the rotating brush roller 35 are moved toward both ends of the transfer sheet. Rake up,
It dropped into the lower chamber 33d. Next, the cold air blowing nozzle 24 blows cold air Ac at 15 ° C. to cool the adhesive and cool it to a bonding temperature or lower, and to blow off solid particles still remaining on the transfer sheet, thereby removing both ends of the transfer sheet. From the chamber 33d. Next, after the base material to be transferred and the transfer sheet have come out of the chamber 33c,
The transfer sheet support was peeled off by the peeling roller 14 to obtain a decorative material D as a transfer product. The support (S) of the transfer sheet after peeling cannot be completely removed only by the brush roller 35 or the cold air spray nozzle 24, and the remaining solid particles are partially removed by the rotating spiral roller 36, and then wound by the winding roller 15. Removed and collected. The pattern was transferred to the decorative material D following the surface irregularities. After the transfer, burrs and bridges of the transfer layer formed on the surface of the decorative material D were welded to the substrate to be transferred by the heating device 37 comprising a spray nozzle for blowing hot air at 130 ° C., and then cooled to room temperature. Further, on the surface of the transfer layer of the decorative material D, an emulsion paint of polyvinylidene fluoride containing 0.5% by weight of a benzotriazole-based ultraviolet absorber is applied to a dry thickness of 10 μm to form a transparent protective layer. A cosmetic material with a transparent protective layer was obtained.

[0081]

As described above, according to the present invention,
A transfer product such as a decorative material having a large three-dimensional uneven surface decorated can be easily obtained. Of course, two-dimensional irregularities such as a window frame and a sash are also possible. In addition to a flat plate material, the shape of the entire surface (envelope surface) is wavy like a tile, or curved convexly or concavely. Even those having a shape can be easily obtained. In addition, it is also possible to transfer on the convex portion of the large irregular surface and inside the concave portion (the bottom portion or the side surface which is the connecting portion between the convex portion and the bottom portion).
Further, even when there is a finer uneven pattern (for example, a hairline, a satin finish, etc.) on the convex part of the large pattern, it is possible to decorate the concave part of the fine unevenness by transfer. Further, unlike the conventional rubber roller pressing method, there is no wear of parts such as the roller due to the concave and convex portions of the substrate to be transferred. As a result, it is possible to obtain a decorative material having an extremely superior design property than before.

Further, since the solid particles are accelerated by an ejector using an impeller having a rotation axis orthogonal to the transfer sheet conveying direction, a wide transfer can be achieved by using only one ejector. A uniform transfer pressure can be applied over the entire width of the sheet and the substrate to be transferred.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of an impeller that can be used as a particle accelerator of an ejector.

FIG. 2 is a schematic diagram illustrating a specific example of a curved surface transfer device.

FIG. 3 is a perspective view of a main part showing an example of three-dimensional surface irregularities of a substrate to be transferred.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Substrate conveyance apparatus 12 Unwinding roll 13 Temporary fixing roller 14 Peeling roller 15 Take-up roll 21 Heating roller 22 Hot air blowing nozzle 23 Particle heating device 24 Cold air blowing nozzle 30 Impeller 301 Blade 302 Side plate 303 Rotating shaft 31 Hopper 32 Spout Containers 33a to 33d Chamber 35 Rotating brush roller 36 Rotating spiral roller 37 Heating device 401 Groove concave portion 402 Flat convex portion 403 Fine irregularity Ac Cold air Ah Hot air B Transfer substrate D Cosmetic material P Solid particles S Transfer sheet

Claims (3)

[Claims] 1. A transfer sheet comprising a support and a transfer layer, wherein the transfer layer side of a transfer sheet comprising a support and a transfer layer is opposed to the uneven surface side of the transfer-receiving base material having the uneven surface, and solid particles collide with the support side of the transfer sheet. The transfer sheet is pressed against the uneven surface of the substrate to be transferred by the collision pressure to adhere the transfer layer to the substrate to be transferred, and then the support of the transfer sheet is peeled off to remove the transfer layer. A method of transferring a curved surface, wherein the acceleration of solid particles colliding with a transfer sheet is performed by an ejector using an impeller having a rotation axis orthogonal to the conveying direction of the transfer sheet. 2. The curved surface transfer method according to claim 1, wherein at least a heat treatment is performed after the transfer layer is transferred onto the transfer substrate. 3. The transfer layer side of a transfer sheet composed of a support and a transfer layer is opposed to the uneven surface side of the transfer-receiving base material having the uneven surface, and solid particles collide with the support side of the transfer sheet. The transfer sheet is pressed against the uneven surface of the substrate to be transferred by the collision pressure to adhere the transfer layer to the substrate to be transferred, and then the support of the transfer sheet is peeled off to remove the transfer layer. An apparatus for performing a method of transferring to a transfer sheet, comprising: a solid particle ejection means for ejecting accelerated solid particles; applying a collision pressure of the solid particles ejected from the ejection means to a transfer sheet; Pressing means for pressing against the transfer-receiving base material, substrate transfer means for transferring the transfer-receiving base material to at least a position facing the ejection means, and a transfer sheet, at least the ejection means and the transfer-receiving base material. Sheet transport to supply between And a feeding means, wherein the solid particle jetting means comprises an jetting device using an impeller having a rotation axis perpendicular to the transfer sheet conveying direction.