JP2000103197A - Curved surface transfer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance transferability, and improve the recovery percentage of particles at the time of transferring the transfer layer of a transfer sheet by the use of solid particle collision pressure on the surface of transferred base material having an uneven surface. SOLUTION: The device is the one utilized for executing a method of transferring a transfer layer to the transferred base material, in which the transfer layer side of a transfer sheet S comprising a support body and transfer layer is allowed to be opposed to the uneven surface side of transferred base material B having an uneven surface, and solid particles P are put in collision with the support body side of the transfer sheet S; which, in use of the collision pressure, the transfer sheet S is brought in close contact with the uneven surface of the transferred base material B in order for the transfer layer to be transferred to the transferred base material B, and is composed of including means on the interior wall of a chamber 33b for collecting the rebounded solid particles the transferred base material B after collision. As such, an accumulation of the solid particles P onto the transferred base material is restrained, so that transferability is enhanced at both the end parts of the transferred base material. Also, a recovery percentage of the solid particles P is improved.

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 curved surface transfer device for producing a decorative material having a decorative uneven surface. It is.

[0002]

2. Description of the Related Art Among such decorative materials having an uneven surface, a method of obtaining a decorative material having a large three-dimensional uneven surface is disclosed in Japanese Patent Application Laid-Open No. 9-315095. 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 which can be transferred by pressing and contacting the transfer sheet by following the surface unevenness of the substrate to be transferred.

[0003]

In the apparatus described in the prior art described in the prior art, the solid particles after colliding with the transfer sheet slide down on the inclined bottom surface in the chamber and fall on the lower portion of the chamber. Collect, from which the drain tube is vacuum pumped and transported, collected in the original hopper and stored for reuse. For this reason, the solid particles that have collided with the transfer sheet bounce off the wall of the chamber or the like, and accumulate on the transfer sheet. There is a problem that transferability at both ends of the base material is reduced. There is also a problem that the recovery rate of solid particles is low.

The present invention has been made in view of the above background, and an object of the present invention is to provide a curved surface transfer apparatus which improves transferability and improves the recovery rate of solid particles. It is in.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention relates to a method of forming a transfer sheet comprising a support and a transfer layer on the uneven surface side of a transfer substrate having an uneven surface. The method of transferring the transfer layer to the transfer substrate by pressing the transfer sheet against the uneven surface of the transfer substrate by using the collision pressure and causing the solid particles to collide against the support side of the transfer sheet is performed. A means for collecting solid particles that have collided with and rebounded from a transfer sheet on a substrate to be transferred, on the inner wall of the chamber.

It is preferable that the means for collecting the solid particles that have collided with and rebounded from the transfer sheet on the substrate to be transferred is a honeycomb-shaped hole formed in the inner wall of the chamber. Further, it is preferable that a pipe is connected to the hole in the inner wall of the chamber.

[0007]

Embodiments 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. 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 three-dimensional shape of the surface irregularities has essentially no planar direction of the pressure application region. (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. That is, two-dimensional unevenness having unevenness only in one direction such as only in the feed direction or only in the width direction, etc.
This means that the present invention can be applied to three-dimensional unevenness having unevenness in a 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 irregular surface having fine irregularities superimposed on large irregularities, or a substrate having a surface to be transferred to the bottom or inner surface of the concave portion of the irregular surface. . The large irregularities and the fine irregularities are, for example, as shown in the main part enlarged perspective view of FIG. 9, the irregularities of the substrate to be transferred are large irregularities 401 and 402 and the minute irregularities 403 on the convex portions 402. The large irregularities have a step of 1 to 10 mm, a width of the concave portion of 1 to 10 mm, and a width of the convex portion of 5 mm or more. The fine irregularities have a step and a width. Both 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 1/2 of the width of the convex portion of the large uneven shape. Less than about.

As a specific example of an uneven pattern of a decorative material having a combination of large and small irregularities and fine irregularities and having 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, including only a flat surface, only a curved surface, or a combination of a flat surface 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, a non-porcelain ceramic board 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, pine, Wood veneer, wood plywood, particle board, laminated wood, medium density fiberboard (MDF) made of oak, lauan, teak, etc.
Wood plate, metal plate such as iron, aluminum, copper, etc.
Ceramics such as ceramics and glass, polypropylene, A
A resin molded product such as a BS resin or a phenol resin may be used.

Further, an easy-adhesion primer for assisting the adhesion to 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 for 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 in order 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 the 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 and the like may 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 partially formed by a conventionally known method such as gravure printing, silk screen printing, offset printing or the like and a picture layer printed with a picture or the like by a material, a metal such as aluminum, chromium, gold or silver by a known vapor deposition method or the like. 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. For the binder, a simple substance such as an acrylic resin, a vinyl chloride-vinyl acetate copolymer, a polyurethane resin, a fluororesin, or a mixture containing these is used. 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 may be provided between the support or the release layer and the decorative layer to adjust the releasability between the decorative layer and the surface of the decorative layer after 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 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-curable 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 polybutadiene 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, an isocyanate group at a molecular terminal obtained by reacting an excess of 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.

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 pigment), a coloring pigment, Various auxiliary materials such as a curing catalyst, a moisture removing agent, a storage stabilizer and an antioxidant are added.

The ionizing radiation-curable resin which can be used as the ionizing radiation-curable adhesive is a composition curable by ionizing radiation, and specifically, has a radical polymerizable unsaturated bond or a cationic polymerizable functional group in the molecule. 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 includes a radically polymerizable unsaturated group such as a (meth) acryloyl group and a (meth) acryloyloxy group, a cationically 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 can be incorporated in the manufacturing apparatus. The irradiation is performed during, after, or after and after the application of the collision pressure.

Further, various additives may be further 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 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-melting adhesive was 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, the 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 nonmetallic 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 heating or cooling means together with the solid particles. 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, the solid particles are ejected from the solid particle ejection means for ejecting the solid particles. The particles are ejected toward the transfer sheet to apply a collision pressure to the transfer sheet. As the solid particle ejecting means, for example, an ejector using a rotating impeller (see FIGS. 1 to 4) or an ejector using an ejection nozzle (see FIG. 5) is used as a particle accelerator. The ejector using the impeller accelerates and ejects solid particles by rotation of the impeller. An ejector using an ejection nozzle accelerates and transports solid particles by a high-speed fluid flow of the fluid using a solid-particle accelerating fluid, and ejects the solid particles together with the fluid. Sand blast or shot blast for impeller and blow nozzle,
Shot peening and blasting can be used. For example, a centrifugal blast device is used for the impeller, and a pressurized or suction blast device, a wet blast device, or the like is used for the blowing nozzle. Centrifugal blasting equipment
The solid particles are accelerated and ejected by the impeller's rotational force. The pressurized blast device ejects solid particles mixed with compressed air together with air. The suction-type blast device sucks solid particles into a negative pressure portion generated by a high-speed flow of compressed air, and ejects the solid particles together with the air. The wet blast device mixes and ejects solid particles with a liquid.

As the means for ejecting solid particles, a method of accelerating solid particles by utilizing free fall by gravity, a method of accelerating magnetic particles by a magnetic field, etc. may be employed other than the ejection nozzle and the impeller. Is also possible. In the case of an impeller, a solid particle ejecting unit using gravity and a magnetic field, the solid particles can be ejected toward the transfer sheet in a vacuum.

[Ejector: Impeller] FIGS. 1 to 4 are explanatory views showing an example of an impeller which can be used as a particle accelerator of the ejector. This impeller corresponds to a centrifugal blast device used in the blasting field.

In the drawing, the impeller 812 includes a plurality of blades 8.
13 is fixed on both sides by two side plates 814, and the center of rotation is a hollow portion 815 without blades 813. Further, a direction controller 816 is provided inside the hollow portion 815. The direction controller 816 has a hollow cylindrical shape having an opening 817 that is partially open in the circumferential direction.
The rotation axis is the same as the rotation axis 12 and is rotatable independently of the impeller. The direction controller 816 fixes the opening 817 in a predetermined direction when used. Further, a hollow impeller 8 is provided inside the direction controller 816.
Another impeller having the same rotation axis as the twelve rotation axes is included as a sprayer 818 (see FIG. 3). Sprayer 818
Rotates with the outer impeller 812. A rotating shaft 819 is fixed to the center of rotation of the side plate 814. The rotating shaft 819 is rotatably supported by a bearing 820, and is driven and rotated by a rotating power source (not shown) such as an electric motor. The impeller 812 rotates. The rotation shaft 819 is
It does not penetrate between the two side plates 814 having the blades 813 therebetween, and forms a space without a shaft.

Then, the solid particles P
Is supplied from a hopper or the like through a transport pipe. Usually, the solid particles P are supplied from above (directly above or obliquely above) the impeller 812. The solid particles P supplied into the sprayer 818 scatter outside by the impeller of the sprayer 818. The scattered solid particles P are emitted only in the direction allowed by the opening 817 of the direction controller 816, and supplied between the blades 813 of the outer impeller 812. Then, it collides with the impeller 813, is accelerated by the rotational force of the impeller 812, and jets out from the impeller 812.

The ejection direction of the solid particles is shown in FIGS.
, But may be horizontal or obliquely downward (not shown). FIG. 4 (A) and FIG. 4 (B)
4A and 4B show conceptual diagrams of the ejection direction control for adjusting the ejection direction of the solid particles P by setting the direction of the opening 817 of the direction controller 816 (in FIGS. 4A and 4B, the direction controllers 816 are respectively illustrated). Fixed in position). Note that the direction controller 816 can also adjust the ejection amount of the solid particles P by adjusting the size of the opening 817 in the circumferential direction and the width direction.

In FIG. 1, the rotating shaft 819 is configured so as not to penetrate to the hollow portion 815 only outside the side plate 814, but in addition, a rotating shaft smaller than the diameter of the hollow portion 815 may be used. Penetrating to the hollow part 815,
It is also possible to adopt a configuration in which the inside of a hollow cylindrical rotary shaft provided with an opening for passing solid particles on the outer periphery is a hollow part (not shown).

The shape of the blade of the impeller is typically a rectangular flat plate (a rectangular parallelepiped) as shown in FIGS. 1 to 4, but other than that, a curved curved plate, a propeller shape such as a screw propeller or the like may be used. It is also possible to select according to the application and purpose. Further, the number of blades is usually selected from a plurality of blades in a range of up to about 10 blades. And the shape of the impeller, the number of blades, the rotation speed, the mass and supply speed and supply direction of the solid particles,
The ejection direction, ejection speed, projection density, ejection diffusion angle, etc. of the accelerated solid particles are adjusted by the combination of the opening size and orientation of the direction controller.

Further, if necessary, the impeller described above is provided with an ejection guide (not shown) for opening only a portion for ejecting and ejecting solid particles and covering the periphery of the impeller. And the ejection direction of solid particles can be controlled. The shape of the opening of the ejection guide is, for example, a hollow cylindrical shape, a polygonal column shape, a conical shape, a polygonal pyramid shape, a fish tail shape, or the like. The ejection guide may have a single opening, or may have an interior partitioned into a honeycomb shape.

The dimensions of the impeller are usually about 5 to 60 cm in diameter, the width of the impeller is about 5 to 20 cm, the length of the impeller is about the diameter of the impeller, and the rotation speed of the impeller is 500 to 5000 r.
pm. The ejection speed of the solid particles is 10 to 50 m /
s, and the projection density is about 10 to 150 kg / m ² .

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.

[Blowing Nozzle] FIG. 5 is an explanatory view of an example of a blowing device 840 using a blowing nozzle as a solid particle blowing means for blowing solid particles together with a fluid. Note that the ejector 840 shown in the figure uses gas as a solid particle accelerating fluid,
It is an example of an ejector in a form in which the gas and the solid particles are mixed and ejected when the solid particles are ejected. The ejector 840 shown in the figure includes an induction chamber 841 for mixing the solid particles P and the fluid F, and an induction chamber 8
The nozzle 41 includes an internal nozzle 842 for ejecting the fluid F into the nozzle 41, and an ejection nozzle 844 for ejecting the solid particles P and the fluid F from the nozzle opening 843. Fluid F sent from a compressor or a blower (not shown) through a pressurized tank (not shown) as appropriate,
Blowing nozzle 8 from internal nozzle 842 through induction chamber 841
When jetting from the nozzle opening 843 of the nozzle 44, the guiding chamber 8
At 41, a negative pressure is created by the action of the fluid flow flowing at high speed, and the negative pressure guides and mixes the solid particles into the fluid flow, accelerates and transports the solid particles with the fluid flow, and causes the nozzle opening 843 of the blowing nozzle 844 to flow. And is ejected together with the fluid flow.

It should be noted that there are blow nozzles which use a liquid as a solid particle accelerating fluid. In the case of liquid, the fluid and solid particles are mixed and stored in a pressurized tank (not shown) by, for example, a pump (not shown, when the fluid is a liquid), and the mixed liquid is discharged from the nozzle opening of the blowing nozzle. What gushes etc. is used.

As the shape of the nozzle opening, there are a hollow cylindrical shape, a polygonal column shape, a conical shape, a polygonal pyramid shape, a fish tail shape and the like. The blowing nozzle may have a single opening, or may have an inside partitioned into a honeycomb shape. Fluid pressure is spraying pressure, usually 0.1-100 kg / cm
^{About 2} . The flow velocity of the fluid flow is usually 1 to 20 for the liquid flow.
m / sec, and about 5 to 80 m / sec for air flow.

The material of the ejector such as the guide chamber and the nozzle may be appropriately selected from ceramics, steel, titanium, titanium alloy and the like according to the type of solid particles and fluid. If the fluid is a liquid, select a material that does not cause rust, dissolution, corrosion, etc. For example, if the fluid is water, stainless steel, titanium,
Uses titanium alloy, synthetic resin, and ceramic. However,
If the surface is waterproofed, steel or the like may be used.

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 for the solid particles, they may be made of stainless steel because they are softer than metal particles.

[Fluid] The fluid is used when the solid particles are accelerated and conveyed by the fluid flow, and the solid particles are ejected together with the fluid from the solid particle ejection means (eg, an ejection nozzle). The fluid is a solid particle acceleration fluid that accelerates the solid particles. Either a gas or a liquid can be used as the fluid, but usually a gas that is easy to handle is used. The gas is typically air, but may be carbon dioxide, nitrogen or the like. On the other hand, the liquid is not necessarily limited, but is nonflammable,
Water is one of the preferred materials because of its ease of drying, non-toxicity, low cost, and availability. In addition, nonflammable liquids such as chlorofluorocarbon can be used. Liquids (as well as gases)
Can collide with the transfer sheet together with the solid particles. Naturally, liquid has a higher density than gas, so liquid is easier to accelerate when solid particles are accelerated by a fluid flow than gas, and when liquid collides with a transfer sheet, Even at a constant velocity collision, the collision pressure is higher than that of gas and a practical collision pressure can be obtained.
(Since the density difference from the solid particles is small, the solid particles can be easily transported.) Therefore, in the case of a liquid, in addition to the collision pressure of the solid particles, the collision pressure of the liquid can be used as the transfer pressure. A transfer pressure can be applied, and as a result, a large effect can be obtained by molding the transfer sheet by following the surface irregularities of the substrate to be transferred. Further, when a fluid is used as the heating or cooling means when the collision pressure is applied, the liquid has a higher specific heat than the gas, so that a greater heating or cooling effect can be obtained. Also, when the liquid is an electric conductor such as water, explosion-proof measures against electrostatic charging are easier than in the case of a gas.

[Collision Pressure Applied Form] Although only one jetting device can be used depending on the area of the collision pressure applying area, if the required area is large, a plurality of ejectors are used to impinge on the transfer sheet. The region may have a desired shape. For example, a plurality of rows are arranged in a straight line in the width direction perpendicular to the feeding direction of the transfer sheet and the transfer-receiving base material, so that the collision area has a band shape that is linear and wide in the width direction. Or,
Even if the ejectors 32 are arranged in a zigzag pattern as shown in FIG. 6A or the ejectors 32 are arranged in a line as shown in FIG. May be arranged so as to collide on the upstream side. In the arrangement shown in FIG. 6B, the pressing of the transfer sheet against the transfer base material by the collision pressure starts from the center in the width direction, and is gradually pressed toward both ends in the width direction. With this configuration, it is possible to prevent the transfer sheet from adhering to the transfer-receiving substrate while air is held in the central portion in the width direction. When a plurality of ejectors 32 are arranged in the width direction as shown in FIGS. 6 (A) and 6 (B), the pressurized regions of the individual ejectors 32 partially overlap with each other, so that the pressure can be completely applied over the entire width. It is preferable to arrange them.
FIG. 6B shows an example of such an arrangement, in which a dotted line portion is a pressing area. In order to lengthen the collision pressure application time, it is preferable that the ejectors are arranged in a multistage arrangement in which two or more rows are arranged in the feed direction of the transfer sheet and the substrate to be transferred.

[Use of Chamber] When solid particles are actually used, it is preferable that the solid particles be recycled without being scattered in the surrounding atmosphere. Therefore, continuous transfer is performed while preventing scattering of solid particles and circulating and recycling the solid particles using the chamber. In the present invention, a means for collecting solid particles that have collided with and rebounded from the transfer sheet on the substrate to be transferred is provided on the inner wall of the chamber. In consideration of the collection efficiency of the solid particles, the collection unit is preferably provided on both side surfaces with respect to the substrate transport direction, but may be provided on the front surface, the rear surface, or the ceiling surface, or may be provided on all of these surfaces. . As the collecting means, a form in which a plurality of holes are formed in a chamber wall, for example, in a honeycomb shape, and a pipe connected to a vacuum source is connected to each of the holes is preferable. The solid particles that have collided with the substrate to be transferred are taken into holes in the chamber wall and collected through a pipe. By providing the collecting means on the chamber wall in this way, deposition on the substrate caused by collision with the wall is suppressed, and transferability is improved. The solid particles collected from the holes in the chamber wall are temporarily stored in a hopper together with the solid particles dropped and collected, if necessary, and then supplied to the solid particle ejection means again.

[One Embodiment of Continuous Transfer Using Chamber] A curved transfer device according to one embodiment of the present invention will be described with reference to FIGS.

The apparatus shown in the figure is a substrate transporting means for transporting a substrate to be transferred B having a plate-like and irregular surface having a flat envelope shape to the substrate, specifically, a substrate-passing portion comprising a conveyor belt in a portion passing through the chamber. 11, an apparatus for transferring a decorative layer or the like with a continuous band-shaped transfer sheet S while transporting the transfer surface in the horizontal direction with the transfer surface facing upward. The solid particles P are in the chamber 33b.
Inside, from a pair of ejectors 32a and 32b using an impeller,
The ink is ejected toward the transfer sheet S and collided, and a collision pressure is given as a transfer pressure. The conveyor belt of the substrate transfer device 11 has an endless annular shape driven by a sprocket wheel or the like. Preferably, in order to prevent solid particles from adhering to the back surface of the substrate D to be transferred, the conveyor belt has a gap through which the solid particles pass. Use something that does not exist. As the material of the conveyor belt, for example, rubber reinforced with cloth, a thin metal plate, a wire mesh, or the like is used.

The chambers 33a to 33c are separated from each other on the upper side of the substrate transfer device 11 except for the entrance and exit of the transfer sheet and the substrate to be transferred from the entrance side of the transfer sheet and the substrate to be transferred. The chambers 33 a to 33 are provided in order and on the lower side of the substrate transport device 11.
A chamber 33d is provided as a common space below the substrate transfer device corresponding to c. The chamber 33d is an upper chamber 3 on both sides in the width direction of the conveyor belt of the substrate transfer device.
3a to 33c. The chamber 33a is a heating chamber, and the chamber 33b is a collision chamber.
The chamber 33c is a post-processing chamber (cooling, solid particle removal), and the lower chamber 33d is a common space but can be said to be a solid particle recovery chamber.

The primary purpose of the chamber is to keep the solid particles from leaking into the surrounding working atmosphere, so that, in particular, the chamber 33b, which is a collision chamber, is located at the entrance and exit of the transfer sheet and the substrate to be transferred. Connecting chambers 33a, 3
The pressure is made lower than 3c. 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.
The pressure can be made lower than 3c. In the chamber 33c, the solid particles fly inside due to the removal of the solid particles by the rotating brush roller 35. However, since the chamber 33c is provided with the cold air blowing nozzle 24 at a portion near the outlet downstream to the outside on the inside thereof, Leakage of solid particles from the outlet is prevented. 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.

As shown in FIG. 8, a plurality of holes 41 are formed in a honeycomb shape as solid particle collecting means on both sides of the inner wall of the chamber 33b, which is a collision chamber. 42 are connected. Each of these pipes 42 is connected to a vacuum source, and sucks and collects the solid particles P which have collided with the transfer sheet S on the base material B and rebounded from the holes 42.

Next, transfer using the apparatus shown in FIGS. 7 and 8 will be described.

First, the base material B to be transferred is placed on a base material transfer device 11 composed of an endless 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. Note that the transfer sheet S is oriented so that the transfer layer faces the base material to be transferred. Thereafter, the transfer sheet S is temporarily pressed to the transfer base material B by a temporary fixing roller 13 having a surface formed of a rubber elastic roller via a guide roller, and is temporarily fixed to the transfer base material B. In the temporary fixing, the transfer sheet S may be fixed only to a part of the convex portion or the like of the base material B to be transferred, and may not contact the inside of the concave portion or the like. When an adhesive is applied to the transfer sheet S at the time of transfer, an adhesive application device (not shown) is provided between the transfer sheet S 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. The transfer base material B integrated with the temporarily fixed transfer sheet S is first conveyed into the chamber 33a, which is a heating chamber, where the transfer sheet S and the transfer sheet S are transferred by the hot air Ah blown from the hot air blowing nozzle 22. The substrate B (and the adhesive (layer)) is heated. As a result, the transfer sheet S is heated and softened, and is easily stretched when a collision pressure is applied. The adhesive is also heated and activated.

On the other hand, as the solid particles P, particles heated by the particle heating device 23 in the hopper 31 are used.
The particle heating device 23 heats the solid particles P by blowing hot air Ah from the outlet of a conduit provided inside the hopper. The heated solid particles P are supplied from the hopper 31 to a pair of ejectors 32a and 32b 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 S
Is exposed to the collision of the solid particles P ejected from the ejectors 32a and 32b. The entire width in the width direction of the base material B to be transferred is covered by the collision pressure application region by the two ejectors 32a and 32b. Then, as the transfer base material B and the transfer sheet S are transported, the entire region in the longitudinal direction is sequentially exposed to the collision pressure. As a result, the transfer sheet S is pressed against the transfer base material B by the solid particle collision pressure, and the transfer sheet S is also extended and deformed into the concave portions on the uneven surface of the transfer base material B, thereby causing the transfer sheet S to be transferred. The transfer layer is formed following the uneven surface shape of the base material B, and the transfer layer adheres to the base material B by the activated adhesive. Then, the transfer base material B in close contact with the uneven surface to which the transfer sheet S is to be transferred is transferred to the next chamber 33 which is a post-processing chamber.
c. In FIG. 7, for convenience of illustration, the hopper 31, the ejectors 32a and 32b, the chamber 3
Although 3a, 33b, 33c and the like are drawn so that the inside can be partially seen, the periphery is actually closed.

Of the solid particles P subjected to collision with the transfer sheet S, the solid particles P collide with the transfer sheet S and
Most of the solid particles P rebounding in the side wall direction are sucked into the holes 41 and collected through the pipe 42, and the collected solid particles P are transported to the original hopper 31 and reused. Also, the remaining solid particles P not sucked into the holes 41
Many of them drop into the lower chamber 33d, bypassing both ends of the conveyor belt of the base material transport device 11. The solid particles P that have fallen into the chamber 33d are transported to the hopper 31 and reused together with the collected solid particles P described above. The solid particles P remaining without falling are transferred to the transfer sheet S.
Is transported to the downstream side while being placed on the support, and enters the next chamber 33c.

The solid particles P that have entered the chamber 33c while being placed on the support of the transfer sheet S are first 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
Blows air at room temperature or lower as cold air Ac onto the transfer sheet S and the substrate B to be transferred,
The substrate to be transferred B and the transfer sheet S are cooled to a temperature at which the support of the transfer sheet S can be peeled off. Chamber 33d
The solid particles P that have fallen are collected and collected by, for example, rubbing off the bottom surface that forms the slope. Recovered solid particles P
Is transferred to the original hopper 31, and the chamber 33b
Is reused together with the solid particles P collected from the side wall of the helium.

Then, the adhered transfer substrate B and the transfer sheet S are forcibly cooled by the cool air blowing nozzle 24, and the remaining solid particles P which can be blown off are also removed.
After being discharged from the outside sheet 3c and exiting to the external space, the transfer sheet S
The (support) is peeled off and removed from the substrate B to be transferred 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 S on the uneven surface of the base material B to be transferred is obtained.

On the other hand, (the support of) the transfer sheet S after passing through the peeling roller 14 is removed by the rotating spiral roller 36 by the rotating brush roller 35 and the cold air blowing nozzle 24, and the solid particles P which are partially adhered without being completely removed. Then, the support of the transfer sheet S is collected on the take-up roll 15. 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 blades lift and remove the solid particles P that have entered the support of the transfer sheet S or adhered by static electricity or the like. This is because the solid particles P become foreign matters in order to reuse the support as a resource. When the remaining solid particles can be completely removed only by the rotating brush roller 35 and the cool air blowing nozzle 24, the rotating spiral roller 36 can be omitted.

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 has been described above, the present invention is not limited to the above-described matter. For example, in the apparatus shown in FIG. 8, as a means for collecting solid particles, a combination of a hole formed in the wall of the chamber and a suction pipe connected to the hole is used, but other forms may be used. For example, the solid particles P are made of a magnetic material having no residual magnetism such as soft iron or a very small magnetic material, an electromagnet is installed on the chamber wall, and the solid particles repelled by the transfer sheet are attracted to the excited electromagnet, and then the excitation is performed. Alternatively, a method may be used in which the solid particles are dropped and collected under their own weight by stopping.

In the apparatus shown in FIG. 7, both the rotating brush roller 35 and the cold air blowing nozzle 24 downstream of the rotating brush roller 35 are installed in this order as the residual solid particle removing means. Rotating brush roller 3 on the side
5 may be installed. In addition, when 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 cool air, the cool air blowing nozzle 24 is omitted. You can also. Of course, if unnecessary, the rotating spiral roller 3
As described above, 6 may be omitted.

In the apparatus shown in FIG. 7, the transfer sheet is pressed against the transfer base material by using a continuous belt-shaped transfer sheet and a sheet-like transfer base material, and while transferring and moving the both integrally, Was used to continuously apply the solid particle collision pressure with the ejector that was used.However, when the transfer sheet was pressed against the transfer base material, the transfer sheet and the transfer base material were stopped only at that time, and intermittent (For example, the ejector is moved to these). 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 the solid particles are ejected 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, etc. 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 as follows.
In particular, it can be used for various uses such as an article having a three-dimensional shape or other irregular surface. 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 the 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 α-alumina (spherical or amorphous) particles; And a paint to which an extender, a lubricant and the like are added. For exterior use, an inorganic paint can 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.

[0089]

Next, an embodiment of the present invention will be described.

First, a plate as illustrated in an enlarged perspective view of a main part of FIG. 9 was prepared as a substrate to be transferred B having three-dimensional surface irregularities. The transfer-receiving base material B has groove-shaped concave portions 401 of joints having a depth of 2.0 mm and an opening width of 7 mm as large irregularities.
Having a flat convex portion 402 of a brickwork pattern, and having fine pavement-like fine unevenness 403 having a depth of 0.1 to 0.5 mm distributed on the flat convex portion as fine unevenness. It is a 12 mm thick calcium silicate plate having three-dimensional surface irregularities in which large irregularities and fine irregularities overlap. Then, after performing a sealing treatment on the surface, a two-component curable urethane-based adhesive (manufactured by Hitachi Chemical Co., Ltd.) was applied by air spray.

On the other hand, the transfer sheet has a thickness of 100
Using a polypropylene-based thermoplastic elastomer film having a thickness of μm, a brick-like pattern having cement joints aligned with the concave-convex surface shape of the transferred substrate B as a decorative layer serving as a transfer layer was sequentially gravure-printed on one surface thereof. I prepared something. As the binder resin for the picture ink, a one-pack urethane resin composed of polycarbonate diol and isophorone diisocyanate and an acrylic resin copolymer resin (T
g = -24, heat softening temperature = 137 ° C., acrylic content 1
6%), and red pigments, isoindolinone, carbon black, and titanium white were used as coloring pigments.

Using the transfer substrate and the transfer sheet, a transfer apparatus using an impeller as shown in FIGS. 7 and 8 is used. It was placed and transported on a substrate transport device 11 composed of a conveyor belt. Then, after the transfer sheet S unwound from the unwinding roll 12 is preheated by the heat exposure 21, the transfer sheet S is temporarily fixed by being pressed against the transfer base material B by a temporary fixing roller 13 formed of a rubber roll, and is transferred into the chamber. Supplied with B. In the first chamber 33a, the hot air Ah from the hot air nozzle 22
Preheating of the transfer sheet S, activation of the adhesive, and heating of the base material B to be transferred. In this case, the surface temperature of the support is 1
Heated to 00 ° C. The transfer-receiving base material B is 7
It was preheated to 0-80 ° C.

Next, the average particle size of the solid particles P is set to 0.1.
A spherical zinc ball of 4 mm is heated to 33 ° C. inside the hopper 31 and is ejected from two ejectors 32 a and 32 b.
The transfer sheet S was caused to collide against the support side of the transfer sheet S from the left and right, and the transfer sheet S was pressed against the base material B to be transferred. The rotation speed of the impeller of each ejector is 3600 rpm, and the ejection speed of the solid particles P is 35 m.
/ S. Among the solid particles P colliding with the transfer sheet S, the solid particles P rebounding toward the side wall of the chamber 33b
Is sucked into the hole 41 formed in the side wall and the pipe 4
2 and was conveyed to the original hopper 31 and reused. Further, most of the remaining solid particles P not sucked into the holes 41 bypass the both ends of the conveyor belt of the base material transport device 11 and fall into the lower chamber 33d, which is also transported to the original hopper 31. And was reused. The solid particles P remaining without falling are transferred to the transfer sheet S.
Transported downstream while still resting on the support.

Then, the transfer sheet S is extended into the joint recess and heat-fused, and the solid particles P remaining on the transfer sheet are transferred by the brush of the brush roller 35 in the chamber 33c next to the chamber 33b. The sheet was scraped toward both ends of the sheet and dropped into the lower chamber 33d. Then
The cold air blowing nozzle 24 blows cold air Ac of 15 ° C.,
The adhesive was cooled to a temperature below the bonding temperature, and the solid particles P still remaining on the transfer sheet were blown off and dropped into the chamber 33d from both ends of the transfer sheet.
Next, after the transfer substrate and the transfer sheet came out of the chamber 33c, the support of the transfer sheet was peeled off by the peeling roller 14, and a decorative material D was obtained as a transfer product. Then, 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.

[0095]

As described above, according to the curved surface transfer apparatus of the present invention, the solid particles which collide with and rebound from the substrate to be transferred are collected by the solid particle collecting means provided on the inner wall of the chamber. Since the accumulation of solid particles on the transfer-receiving substrate is suppressed, the transferability at both ends of the transfer-receiving substrate can be improved. In addition, the recovery rate of solid particles is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an ejector using an impeller.

FIG. 2 is a front view of the ejector of FIG.

FIG. 3 is an explanatory view of the inside of the ejector of FIG. 1;

FIG. 4 is an explanatory diagram for adjusting a jetting direction by the jetting device of FIG. 1;

FIG. 5 is a cross-sectional view showing an example of an ejector using an ejection nozzle.

FIG. 6 is a view showing an example of an arrangement state of the ejectors, in which (A) is an arrangement view in a state of being arranged in a staggered lattice pattern, and (B) is a downstream section as the center portion is located on the upstream side and both ends are located on the downstream side. It is an arrangement view of the state where it shifted.

FIG. 7 is a schematic diagram showing a specific example of a curved surface transfer device.

FIG. 8 is a cross-sectional view of the curved surface transfer device of FIG.

FIG. 9 is an enlarged perspective view of a waist showing an example of a transfer substrate having three-dimensional surface irregularities.

[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 31 Hopper 32a, 32b Ejector 33a-33d Chamber 35 Rotary brush roller 36 rotating helical roller 41 hole 42 pipe 401 concave part 402 convex part 403 fine irregularity 812,812a impeller 813,813a blade 814,814a side plate 815 hollow part 816 direction controller 817 opening part 818 disperser 819,819a rotating shaft 820 bearing 840 Spouter using blow-off nozzle 841 Induction chamber 842 Internal nozzle 843 Nozzle opening 844 Nozzle Ac Cold air Ah Hot air B Transfer receiving substrate D Cosmetic material F Fluid G Adhesive P Solid particles S Transfer sheet

Claims (3)

[Claims] A transfer sheet comprising a support and a transfer layer is opposed to a transfer layer side of a transfer sheet comprising a support and a transfer layer, and solid particles collide with the support side of the transfer sheet. An apparatus used to carry out a method of transferring a transfer layer to a transfer-receiving substrate by pressing a transfer sheet against an uneven surface of a transfer-receiving substrate using an impact pressure. A curved surface transfer apparatus, wherein a means for collecting solid particles that have bounced off by colliding with a transfer sheet is provided on an inner wall of the chamber. 2. The curved surface according to claim 1, wherein the means for collecting solid particles that have collided with and rebounded from the transfer sheet on the transfer-receiving substrate is a honeycomb-shaped hole formed in the inner wall of the chamber. Transfer device. 3. The curved surface transfer device according to claim 2, wherein a pipe is connected to a hole in the inner wall of the chamber.