JP2000318390A - Curved surface transferring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transfer solid particles in a good state having no elongation of a transfer sheet and no film cutout or the like of a transfer layer. SOLUTION: The curved surface transferring apparatus comprises a sheet press bonding means 4 for temporarily press bonding a transfer sheet S to a base material B to be transferred before colliding solid particles P by an elastic blade 3 extended in a length of a width or above of the material B in a direction perpendicular to a conveying direction of the sheet S in the case of transferring a transfer layer to the material B by opposing the layer side of the sheet S having a support and the transfer layer to a uneven surface side of the material B, colliding the particles P to the support side, bringing the sheet S into pressure contact with the uneven surface of the material B by utilizing the colliding pressure and then releasing and removing the support S' of the sheet. Thus, since the sheet can uniformly be set without wrinkle before projecting the particles without influence of a thickness change, a warp or the like of the material B, the layer can be transferred in a good state.

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 used 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 Recently, various transfer techniques using the projection of solid particles as a transfer pressure have been proposed as an effective means for producing such a decorative material having an uneven surface. For example, a curved surface transfer method and apparatus described in Japanese Patent Application Laid-Open No. H10-211799 is one of the methods. In the method described in this publication, as shown in FIG. The transfer layer side of the transfer sheet S including the support and the transfer layer is opposed to each other, and a roller pressure is first applied by an elastic roller R as a transfer pressure, and the transfer sheet is transferred to at least the convex portion of the uneven surface of the base material to be transferred. Then, the solid particles P collide against the support side of the transfer sheet S, and the collision pressure is applied to press the transfer sheet S against the uneven surface of the base material B to be transferred. The decorative plate D is obtained by removing the support S 'of S.

[0003]

According to the curved surface transfer apparatus described in the prior art, the transferable area can be expanded by being able to transfer to the area on the uneven surface of the substrate to which the transfer is not performed by the elastic roller. Alternatively, there is an advantage that the adhesive force between the transfer layer and the substrate to be transferred can be made uniform and strong in both the concave portions and the convex portions. However, the pressing force of the elastic roller becomes non-uniform due to a change in the thickness of the base material to be transferred, an uneven shape, warpage, and the like, and the transfer sheet may be wrinkled or the base material may be broken due to strong pressure. . In addition, the peripheral speed of the elastic roller does not match the transport speed of the substrate to be transferred, so that the transfer sheet may elongate and the transfer layer may break.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to wrinkle or elongate a transfer sheet during temporary press-bonding to a transfer-receiving substrate. It is an object of the present invention to provide a curved surface transfer device that enables transfer by solid particles in a favorable state in which the transfer layer does not break and the transfer layer does not break.

[0005]

In order to achieve the above-mentioned object, the present invention provides a transfer sheet comprising a support and a transfer layer on an uneven surface side of a transfer-receiving substrate having an uneven surface. Are opposed to each other, solid particles collide from the support side of the transfer sheet, and the pressure of the transfer sheet is pressed against the uneven surface of the base material to be transferred by using the collision pressure, and then the support of the transfer sheet is peeled off. An apparatus used to carry out a method of transferring a transfer layer to a substrate to be transferred by transferring the transfer layer, wherein at least (1) a solid particle ejecting means for ejecting solid particles; A base material transporting means for transporting the transfer base material to a position immediately below the solid particle ejection means, (3) a transfer sheet transport means for transporting the transfer sheet between the solid particle emission means and the transfer target substrate, and (4) transfer At least the width of the substrate in the direction perpendicular to the sheet conveyance direction Has elastic blade was extended in length, and the sheet pressing means for temporarily bonding the transfer sheet to a transfer substrate prior to the collision of solid particles by the elastic blade,
It is characterized by having.

Further, in the solid particle ejection area of the curved surface transfer device having the above-mentioned structure, a rotating roller or an endless belt having a peripheral speed synchronized with the transport speed of the substrate transport means is provided. It is preferable to provide a sheet press for pressing the transfer sheet against the base material conveying means to seal the gap therebetween.

[0007]

FIG. 2 is a schematic structural view showing an example of a curved surface transfer device according to the present invention. As shown in the figure, the substrate B to be transferred is continuously conveyed by a belt conveyor 1 as a substrate conveying means, and the transfer sheet S composed of a support and a transfer layer is transferred at a speed equal to the conveying speed of the substrate B to be transferred. It is fed out from the unwinding roll 2 in synchronization. Then, the transfer layer side of the transfer sheet S is opposed to the uneven surface of the base material B to be transferred. First, the transfer sheet S is temporarily pressed to the uneven surface of the base material B by the sheet pressing means 4 having the elastic blades 3. Is done. Subsequently, the transfer base material B covered by the transfer sheet S is exposed to the collision pressure of the solid particles P jetted from the solid particle jetting means 6 in the pressure applying unit 5. Thereafter, the support S ′ is discharged from the pressure applying unit 5 and is subsequently separated by the separation roller 7, and the transfer target substrate B is carried out as a decorative plate D integrally with the transfer layer. On the other hand, the transfer sheet S peeled off by the peeling roller 7
Is wound up as a discharge roll 8.

FIG. 3 is an explanatory view showing a state of temporary compression by an elastic blade of the sheet compression means. The elastic blade 3 has a long plate shape as shown in FIG. 4, and includes silicone rubber, fluorine rubber, viton rubber, butadiene rubber,
Natural rubber or the like is used as the elastic body. The elastic blade 3 functions to press the transfer sheet S onto the uneven surface of the base material B to be transferred by its own weight and warpage. The rubber hardness of the elastic blade 3 is not particularly limited, and may be properly used depending on the shape of the surface unevenness of the base material to be transferred and the extent to which the transfer sheet is adhered to the surface unevenness by the elastic blade 3. Make it about 30-70 °. The width a of the elastic blade 3 is about 5 to 20 mm, and the height b is 50 to 1
The length c is about 00 mm, and the length c is equal to or larger than the width of the transfer-receiving substrate. The tip of the elastic blade 3 may be flat, but may take various shapes as illustrated in FIGS. 5 (a) to 5 (g). In FIGS. 5F and 5G, arrows indicate the transport direction of the transfer sheet and the base material.

After the transfer sheet S is temporarily pressed by the elastic blade 3, the transfer base material B covered with the transfer sheet S
Enters the pressure applying section 5 which is a solid particle ejection area. In the pressure applying section 5, as shown in FIG. It is desirable to provide a sheet press for pressing the means to seal the gap between them. In the illustrated example, a pair of endless belts 9 having a peripheral speed synchronized with the conveyance speed of the belt conveyor 1 are installed. However, rotating rollers synchronized with the conveyance speed of the belt conveyor 1 are continuously provided on both sides of the transfer sheet S. The transfer sheets S may be pressed side by side. As described above, after the transfer sheet S is temporarily compressed by the elastic blade 3, by pressing both sides with the sheet press, the transfer sheet S is fixed uniformly on the uneven surface of the base material B without wrinkles. The transfer by the solid particles P can be performed. In addition, it is possible to prevent the solid particles P from backing and adhering to the side surface and the back surface of the transfer-receiving substrate B.

Hereinafter, the details of the present invention will be described in more detail.

[Substrate to be Transferred] The substrate to be used in the present invention may have a flat surface to be transferred. Of course, the present invention shows its true value 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 (envelope surface 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 pattern unevenness and the fine unevenness are, for example, as shown in an enlarged perspective view of a main part of FIG. 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.

[0014] Specific examples of the uneven pattern of the decorative material, which is composed of a combination of large and small irregularities and fine irregularities and has three-dimensional surface irregularities, include joints and grooves as large irregularities. It has a two-dimensional array pattern of tiles, bricks, stones, etc., and 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 and a sealer for blocking exuding components such as alkali components exuding from the receiving substrate are previously provided on the surface of the substrate to be transferred. An agent or a sealing agent for sealing and sealing fine irregularities and porosity on the surface may be applied. 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, a sealer, or a filler.

[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 or a functional 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 easily remove the residual air embraced between the transfer-receiving substrate surface and the transfer sheet,
If necessary, a large number of small holes may be formed in the entire surface of the transfer sheet so as to penetrate the entire layer of the transfer sheet.

(Support) As a support for the transfer sheet,
If the substrate to be transferred is a flat surface or a two-dimensional uneven surface, paper or the like without stretchability is also possible, but in order to apply the present invention to a three-dimensional uneven surface that exhibits its true value, it is necessary to stretch at least at the time of transfer. Use a flexible support. 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 forming a transfer layer such as a decorative layer, and at the time of transfer, sufficient stretchability is exhibited by heating, and after cooling, the deformed shape is maintained, and the shape is restored by elasticity. A transfer sheet that can be used in the present invention can be easily prepared as a transfer sheet that does not cause the problem, similarly to 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 can easily exhibit stretchability at lower temperature and lower pressure include, for example, thermoplastic polyester resins such as ethylene terephthalate / isophthalate copolymer polyester and polybutylene terephthalate, polypropylene, polyethylene, and ethylene-propylene copolymer. Polymer, ethylene-
Polyolefin resin such as propylene-butene terpolymer, vinyl chloride resin, or natural rubber, synthetic rubber, olefin-based thermoplastic elastomer, etc., alone or as a mixture,
A resin film having a single layer or a plurality of different layers can be used. These resin films are preferably low stretched or unstretched. The thickness of the support used is usually 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. This release layer is peeled off from the transfer layer together with the support when the support is peeled off. 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 comprises at least a decorative layer or a functional layer, and a release layer, an adhesive layer or 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 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 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. Alternatively, a known method is used in which a known various sublimable dye such as a triphenylmethine-based disperse dye is used, and heated in addition to solid particle collision pressure at the time of transfer, and the sublimed dye is dyed on a substrate to be transferred and transferred. It is also possible to adopt. If the transfer substrate itself does not have a dyeing property, a receiving layer made of a known resin such as a polyester resin or an acrylic resin may be formed on the surface of the transfer substrate in advance.
Examples of the functional layer include a conductive layer (which functions as an electromagnetic wave shielding layer, an antistatic layer, and the like) made of a thin metal film of high conductivity such as aluminum or silver; a silver ion-supporting zeolite powder;
An antibacterial agent such as 0'-oxybisphenoxyarsine or a fungicide is used. As the transfer layer, both the decorative layer and the functional layer may be used in combination.

The release layer is provided between the support or the release layer and the decorative layer in order to adjust the releasability between the decorative layer and to protect 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 properly. 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 conventionally known adhesives such as vinyl chloride-vinyl acetate copolymer, acrylic resin, thermoplastic polyester resin, thermoplastic urethane resin, and polyamide resin obtained by condensation polymerization of dimer acid and ethylenediamine. Can be used. As the thermosetting adhesive, diallyl phthalate resin, thermosetting urethane resin, 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.

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.

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, 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 ultraviolet rays 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 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, alumina beads, zirconia beads, corundum beads, and alundum beads, iron, carbon steel, and stainless steel. Such as iron alloys, aluminum, aluminum alloys such as duralumin, titanium, metal particles such as metal beads such as zinc, or fluororesin beads, nylon beads,
Organic particles such as resin beads such as silicone resin beads, urethane resin beads, urea resin beads, and crosslinked rubber beads, or inorganic substances composed of resin and inorganic particles such as metals.
Resin composite particles and the like can be used. 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 ejecting 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. 6 to 9) or an ejector using an ejection nozzle (see FIG. 10) is used as a particle accelerator. The ejector using the impeller accelerates and ejects solid particles by rotation of the impeller. On the other hand, an ejector using a blowing nozzle uses a solid particle acceleration fluid to accelerate and transport solid particles with a high-speed fluid flow of the fluid and eject the solid particles together with the fluid.
Sandblasting, shot blasting, shot peening and the like used in the blasting field can be used for the impeller and the blowing nozzle. 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. A centrifugal blast device accelerates and ejects solid particles by the rotational force of an impeller. 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 using free fall due to gravity, a method of accelerating magnetic particles by a magnetic field, and the like besides the blowing nozzle and the impeller may be employed. 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. 6 to 9 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. 8). 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 direction in which the solid particles are ejected is substantially vertically downward as shown in FIGS. 6 and 7, but may be horizontally or obliquely downward (not shown). 9A and 9
(B) shows a conceptual diagram 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 (the direction controller 816 in FIGS. 9A and 9B).
Are fixed at the illustrated positions). 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. 6, the rotating shaft 819 is configured so as to be only outside the side plate 814 and not penetrate to the hollow portion 815. In addition, the rotating shaft 819 is thinner than the diameter of the hollow portion 815. 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. 6 to 9. In addition, 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, the impeller described above is further provided with an ejection guide (not shown) for opening only the ejection and ejection portion of the solid particles and covering the periphery of the other impellers, if necessary. 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 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 4000 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. 10 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 is an example of an ejector that uses a gas as a solid particle accelerating fluid and mixes and ejects the gas and the solid particles when ejecting the solid particles. Spouter 840 in FIG.
A guide chamber 841 for mixing the solid particles P and the fluid F, an internal nozzle 842 for jetting the fluid F into the guide chamber 841,
It comprises a blowing nozzle 844 that blows out the solid particles P and the fluid F from the nozzle opening 843. When the fluid F sent from a compressor or a blower (not shown) through a pressurized tank (not shown) as appropriate is ejected from the internal nozzle 842 through the induction chamber 841 through the nozzle opening 843 of the blowing nozzle 844, the guide chamber is used. At 841, a negative pressure is created by the action of the fluid flow flowing at a high speed, the solid particles are introduced into the fluid flow by the negative pressure and mixed, and the solid particles are accelerated and conveyed by the fluid flow. And is ejected together with the fluid flow.

It should be noted that the blowing nozzle includes a blowing nozzle using 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.

The shape of the nozzle opening includes a hollow columnar shape, a polygonal column shape, a conical shape, a polygonal pyramid shape, a fish tail shape, and the like. The fluid pressure is generally about 0.1 to 100 kg / cm ^{2 in} spray pressure. The flow velocity of the fluid flow is usually about 1 to 20 m / sec for the liquid flow, and is usually about 5 to 80 m / sec for the air flow.

The material of the ejector such as the guide chamber and the nozzle may be appropriately selected from ceramics, steel, titanium, titanium alloys 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.

The solid particles pass along the inner wall of the ejector, but when metal beads or inorganic particles are used as the solid particles, the particles are hard. It is preferable to use steel or the like whose surface is coated with ceramics. When resin beads are used as the solid particles, carbon beads (ordinary steel) may be used 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.

[Impacting pressure application mode] Although only one jetting device can be used depending on the area of the impacting pressure application area, if the required area is large, a plurality of jetting devices 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. 11A 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. 11B, the pressing of the transfer sheet against the transfer substrate 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 the ejectors 32 are arranged in the width direction as shown in FIGS.
It is preferable that the pressurizing regions of the individual ejectors 32 partially overlap each other and are arranged so that pressurization can be performed without fail over the entire width. FIG. 11B shows an example of such an array,
In the figure, 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 the solid particles are actually used, it is preferable that the solid particles are not scattered in the surrounding atmosphere and are circulated and reused. Therefore, continuous transfer is performed while preventing scattering of solid particles and circulating and recycling the solid particles using the chamber. in this case,
Solid particles in a state in which the transfer sheet is pressed on the outer sides of both sides of the base material to be transferred by a rotating roller or an endless belt having a peripheral speed synchronized with the transfer speed of the base material transfer means to seal a gap with the base material transfer means. It is desirable to apply the collision pressure of the solid particles while preventing the solid particles behind the transfer layer side of the transfer sheet from adhering to the side surface and the back surface of the substrate to be transferred. The solid particles dropped and collected below the chamber are temporarily stored in a hopper if necessary, and then supplied to the solid particle ejection means again.

[One Embodiment of Continuous Transfer Using Chamber] Next, a curved transfer device as one embodiment of the present invention will be described with reference to FIG.

The apparatus shown in the figure is a substrate transporting means for transporting a substrate B to be transferred having a plate-like and irregular surface with a flat envelope shape, specifically a conveyor belt in the chamber passing portion. 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, a jetting device 32 using an impeller jets the jetting sheet S toward the transfer sheet S to collide with the transfer sheet S, and gives a collision pressure 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, the solid particles P penetrate to prevent the solid particles P from adhering to the back surface of the transfer target substrate B. Use one with no gap. 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.

In the upper part of the substrate transfer device 11, the chambers 33a to 33c which are separated from each other except for the entrance of the transfer sheet S and the substrate to be transferred B are separated from each other. The chamber 33 is provided in this order from the inlet side, and the chamber 33
A chamber 33d is provided as a common space below the substrate transfer device corresponding to a to 33c. The chamber 33d is connected to the upper chambers 33a to 33c at both side portions in the width direction of the conveyor belt of the base material transport device 11. The chamber 33a is a heating chamber, the chamber 33b is a collision chamber (solid particle ejection area), the chamber 33c is a post-processing chamber (cooling, solid particle removal), and the lower chamber 33d is a common space. However, it can also be called a solid particle recovery chamber.

The first purpose of the chamber is to keep the solid particles P from leaking into the surrounding working atmosphere,
Therefore, the chamber 33b, which is a collision chamber, is connected to the transfer sheet S and the transfer target substrate B at the entrance and exit.
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
Also, the solid particles P fly inside by the removal of the solid particles by the rotating brush roller 35, but the chamber 33c has a cold air blowing nozzle
4, the solid particles can be prevented from leaking from the outlet. In order to prevent the solid particles P from flowing back from the chamber to the hopper, the pressure inside the chamber 33b serving as the collision chamber is preferably set lower than that outside the chamber. 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.

The curved surface transfer apparatus shown in FIG. 12 has an elastic blade 3 as shown in FIGS. 2 and 3, and the transfer sheet S is transferred by the elastic blade 3 before the solid particles collide. A sheet crimping means 4 for temporarily crimping the sheet B is provided.

The chamber 33b, which is a collision chamber,
A sheet holder made up of the endless belt 18 is provided below the ejector 32. This endless belt 18
The transfer sheet S preliminarily pressed by the elastic blade 3 serves to uniformly fix the transfer sheet S on the uneven surface of the base material B without wrinkles, and the solid particles P wrap around the side surface of the base material B. The transfer sheet S is pressed near both sides so as not to adhere to the back surface.

The transfer using the curved surface transfer device shown in FIG. 12 will be described. First, the base material B to be transferred is placed on the 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 there is a solvent component in the adhesive or the like to be applied, the evaporated component is volatilized and dried from the viewpoint of explosion-proof measures in the chamber, and then is carried into the chamber 33a.

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 passes through the guide roller 17 and passes through the elastic blade 3
Is pressed against the substrate to be transferred B, and is temporarily press-bonded to the substrate to be transferred B. At this time, the temporary press-bonding may be performed only when the transfer sheet S is fixed to a part of the convex portion or the like of the base material B to be transferred, and does not need to 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 elastic blade 3 and drying is performed.

Then, the transfer-receiving substrate B integrated with the pre-pressed transfer sheet S is first placed in the chamber 3 serving as a heating chamber.
3a, the transfer sheet S and the transfer base material B are transferred by the hot air Ah blown out of the hot air blowing nozzle 22 there.
(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. However, when the transfer sheet S does not need to be preheated together with the base material B to be transferred, the preheating roller 21 and the hot air blowing nozzle 22 may not be used. When preheating of the transfer sheet S is unnecessary and only preheating of the substrate B to be transferred is necessary, the preheating roller 21 and the hot air blowing nozzle 22 are not used, and instead, FIG.
As shown in FIG. 0, a transfer-substrate heating device 16 may be provided before the temporary fixing roller 13. As the transfer substrate heating device 16, an infrared radiation system, a hot air blowing system, an induction heating system, a dielectric heating system, or the like is used.

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 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 S on the transfer base material B is
Exposed to the collision of the solid particles P ejected from the ejector 32,
As the transfer base material B and the transfer sheet S are transported,
All regions in the longitudinal direction are sequentially exposed to the impact pressure. As a result, the transfer sheet S is transferred to the transfer base material B by the solid particle collision pressure.
The transfer sheet S is extended and deformed into the concave portions of the concave and convex surface of the transferred base material B, so that the transfer sheet S follows the concave and convex surface shape of the transferred base material B and is activated. The transfer layer is brought into close contact with the base material B to be transferred by the adhesive. And
The transfer base material B in close contact with the uneven surface on which the transfer sheet S is to be transferred is transported to the next chamber 33c which is a post-processing chamber. In FIG. 10, for convenience of illustration, the hopper 31, the ejector 32, the chambers 33a, 33b, 33c and the like are drawn so as to be partially visible, but the periphery is actually closed. Here, the hopper 31, the particle heating device 23, the ejector 32, the chamber 33b, and the chamber 3
3d constitutes a solid particle ejection means (transfer pressure applying means).

In the chamber 33b, which is a solid particle ejection area, the collision of the solid particles P is carried out in a state where the vicinity of both sides of the transfer sheet S is pressed toward the base material transporting device by a sheet press made up of a pair of endless belts 18. Therefore, the back of the solid particles P is prevented. On the other hand, among the solid particles P that have been subjected to the collision with the transfer sheet S, those that have flown onto the upper surface (top surface) of the substrate to be transferred apply an impact pressure (transfer pressure) to the upper surface. After that, the light is reflected and a part of the light falls around the both ends of the conveyor belt of the base material transport device 11 and falls into the lower chamber 33d. However, the remaining portion is transported downstream while remaining on the transfer sheet support, and enters the next chamber 33c.

On the upper surface (top surface) of the base material to be transferred, the chamber 33 is mounted on the support of the transfer sheet S.
The solid particles P entering c are first removed from the transfer sheet by the rotating brush roller 35. Rotating brush roller 35
May be one in which the hairs are evenly implanted on the entire surface, but it is desirable that the hairs be implanted so that a left-right spiral is formed around 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 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 cool air blowing nozzle 24, and the solid particles P which have been 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 S is pressed, before or after the support is peeled off, a heating device or an ionizing radiation curable resin can be used. In such a case, an ionizing radiation irradiating device such as a mercury lamp (ultraviolet light source) may be provided for in-line curing.

[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. 12, 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 a residual solid particle removing means. A brush roller 35 may be provided. Further, when the remaining solid particles can be completely removed only by the rotating brush roller 35 and the transfer sheet S and the transfer-receiving substrate B can be sufficiently cooled without spraying the cool air, the cool air blowing nozzle 24 is used. It can be omitted. Of course, if unnecessary, the rotary spiral roller 36 may be omitted as described above.

[Use of Transfer Product] The use of a transfer product such as a decorative material obtained by the present invention is performed by using a decorative surface having a transferred 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 wardrobes, surface decorations of cabinets for 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, a fluorine resin such as polyvinylidene fluoride, an acrylic resin such as polymethyl methacrylate, a silicone resin, a binder of one or more of urethane resins, and the like, if necessary, Benzotriazole,
UV absorbers such as ultrafine cerium oxide, light stabilizers such as hindered amine radical scavengers, lubricating agents such as silica, α-alumina (spherical, scale or irregular) particles, coloring pigments, extender pigments, lubricants, etc. Use the added paint. 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.

[0087]

EXAMPLE First, a plate as illustrated in an enlarged perspective view of a main part of FIG. 13 was prepared as a substrate to be transferred B having three-dimensional surface irregularities. The transferred 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 protruding portion 402 having a brickwork pattern. It has a matte-tone fine unevenness 403 whose depth is distributed in the range of 0.1 to 0.5 mm, and has a three-dimensional surface unevenness in which these large pattern unevenness and fine unevenness are superimposed, and has a thickness of 12 mm. It is a calcium silicate plate. And
After subjecting the surface to a sealing treatment, a two-component curable urethane-based adhesive was applied by air spray.

On the other hand, the transfer sheet has a thickness of 100
μm, using a polypropylene-based thermoplastic elastomer film with a total width of 500 mm, on one side of which a brick-like pattern having cement joints aligned with the uneven surface shape of the transferred substrate B as a decorative layer serving as a transfer layer is sequentially formed. A gravure print was prepared. As the binder resin for the picture ink, a one-part urethane resin composed of polycarbonate diol and isophorone diisocyanate and a copolymer resin of an acrylic resin (Tg = −24 ° C., heat softening temperature = 137)
C., acryl content: 16%), and red pigments, isoindolinone, carbon black and titanium white were used as coloring pigments.

Using the above-mentioned transfer substrate and transfer sheet, a transfer device using an impeller as shown in FIG. 12 is used, and the transfer substrate B is transferred onto a substrate transport device 11 comprising a conveyor belt. It was mounted and transported at a line speed of 25 m / min. Then, after the transfer sheet S unwound from the unwinding roll 12 is heated by the preheating roller 21, the transfer sheet S is pressed against the base material B to be temporarily pressed by the sheet pressing means 4 having the rubber elastic blade 3, and the chamber is temporarily pressed. And was supplied integrally with the substrate B to be transferred. In the first chamber 33a, the hot air nozzle 2
The hot air Ah from Step 2 softened the transfer sheet S by preheating, activated the adhesive, and heated the transfer-receiving substrate B. In this case, heating was performed so that the surface temperature of the support became 100 ° C. The substrate B to be transferred was preheated to 70 to 80 ° C. by using a substrate heating device 16 of an infrared radiation type.

Next, the average particle size of the solid particles P is set to 0.1.
4 mm spherical zinc particles are heated to 50 ° C. inside the hopper 31.
The transfer sheet S was ejected from the ejector 32 to collide with the support of the transfer sheet S, and the transfer sheet S was pressed against the base material B to be transferred. The rotation speed of the impeller of the ejector is 3600 rpm, the ejection speed of the solid particles P is 35 m / s, and the projection density is 100 k.
g / m ² . Most of the solid particles P that collided with the transfer sheet S bypassed both ends of the conveyor belt of the base material transport device 11, dropped into the lower chamber 33d, transported to the original hopper 31, and reused. . The solid particles P remaining without falling were transferred to the downstream chamber 33c while being placed on the support of the transfer sheet S.

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, the transfer base material B and the transfer sheet S are placed in the chamber 33.
After exiting from c, the support S ′ of the transfer sheet S was peeled off by the peeling roller 14 to obtain a decorative material D 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 was dried to a thickness of 10 μm.
m to form a transparent protective layer to obtain a decorative material with a transparent protective layer.

[0092]

As described above, according to the present invention,
Since the elastic member blade extending in the direction perpendicular to the transfer sheet conveying direction with a length equal to or greater than the width of the base member is provided with a sheet pressing means for temporarily pressing the transfer sheet to the transfer target substrate before the collision of the solid particles. The transfer sheet can be set uniformly without wrinkles before projecting solid particles without being affected by changes in the thickness of the transfer substrate, unevenness, warpage, etc. Transfer with solid particles under the following conditions.

Further, in the solid particle ejection region, the transfer sheet is formed of a rotating roller or an endless belt having a peripheral speed synchronized with the transfer speed of the base material transfer means. By providing the means with a sheet press for closing the gap between them, transfer by projection of solid particles is performed in a state where uniform setting of the transfer sheet is ensured.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a conventional curved surface transfer device.

FIG. 2 is a schematic configuration diagram illustrating an example of a curved surface transfer device according to the present invention.

FIG. 3 is an explanatory diagram showing a state of temporary compression by an elastic blade of a sheet compression unit.

FIG. 4 is a perspective view showing an example of an elastic blade.

FIG. 5 is an explanatory view showing various examples of elastic blades.

FIG. 6 is a perspective view showing an example of an ejector using an impeller.

FIG. 7 is a front view of the ejector of FIG. 6;

FIG. 8 is an explanatory view of the inside of the ejector of FIG. 6;

FIG. 9 is an explanatory diagram for adjusting a jetting direction by the jetting device of FIG. 6;

FIG. 10 is a cross-sectional view showing an example of an ejector using an ejection nozzle.

FIG. 11 is an explanatory diagram showing an example of an arrangement state of ejectors.

FIG. 12 is a schematic view showing a specific example of a curved surface transfer device.

FIG. 13 is an enlarged perspective view of a main part showing an example of a transfer substrate having three-dimensional surface irregularities.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 belt conveyor 2 unwinding roll 3 elastic blade 4 sheet pressing means 5 pressure application unit 6 solid particle ejection means 7 peeling roller 8 discharge roll 9 endless belt 11 substrate transport device 12 unwinding roll 14 peeling roller 15 discharge roll 16 Transfer substrate heating device 17 Guide roller 18 Sheet presser 21 Preheating roller 22 Hot air blowing nozzle 23 Particle heating device 24 Cold air blowing nozzle 31 Hopper 32 Sprayer 33a-33d Chamber 35 Rotary brush roller 401 Concave 402 Convex portion 403 Fine irregularities 812, 812a Impellers 813, 813a Blades 814, 814a Side plate 815 Hollow section 816 Direction controller 817 Opening section 818 Sprayer 819, 819a Rotating shaft 820 Bearing 840 Sprayer using blowing nozzle 841 Induction chamber 842 Internal nozzle 8 3 the nozzle opening 844 nozzles Ac cold Ah hot air B to be transferred substrate D decorative material F fluid P solid particles S transfer sheet

Claims (2)

[Claims] 1. A transfer sheet comprising a support and a transfer layer, wherein the transfer layer side of the 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 from the support side of the transfer sheet. A method of transferring the transfer layer to the transfer substrate by peeling and removing the support of the transfer sheet after pressing the transfer sheet against the uneven surface of the transfer substrate using the collision pressure. An apparatus used to implement
At least (1) solid particle ejection means for ejecting solid particles, (2) substrate transport means for transporting the substrate to be transferred to immediately below the solid particle ejection means, and (3) solid particle ejection means for transferring the transfer sheet. And (4) an elastic blade extending at least as long as the width of the base material in a direction perpendicular to the transfer direction of the transfer sheet. And a sheet pressing means for temporarily pressing the transfer sheet to the substrate to be transferred before the collision of the solid particles by the body blade. 2. In the solid particle ejection region, the transfer sheet is formed of a rotating roller or an endless belt having a peripheral speed synchronized with the transfer speed of the base material transfer means. 2. The curved surface transfer device according to claim 1, further comprising a sheet press for pressing the means to seal a gap between the two.