JPH11235895A - Curved surface transferring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently manufacture a decorative material having a three- dimensional protrusion and recess surface. SOLUTION: In the curved surface transferring apparatus for executing at least the steps of opposing a transfer layer side of a transfer sheet having a support and the transfer layer to a protrusion and recess surface side of a base material to be transferred having the protrusion and recess surface, colliding solid particles with the support side of the sheet, bringing the sheet into pressure contact with the protrusion and recess surface of the base material by utilizing the colliding pressure to bring the layer into pressure contact with the base material, the apparatus comprises a solid particle injecting means for accelerating and injecting the particles, and solid particle storage and heating means for once storing the particles P in a hopper 31, heating the stored particles P by a hot air from a conduit 3, and sequentially sending it to the injection means. Since the sheet is heated and softened, it can be easily followed to be molded to the protrusion and recess surface of the base material and the adhesive layer is heated to develop an adhesive force.

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 Conventionally, decorative materials having a decoration such as a picture on a surface of a base material by a direct printing method, a laminating method, a transferring method or the like have been used for various purposes. In this case, if the surface of the base material is flat, there is no problem since the pattern decoration can be easily performed, but the pattern decoration is applied to the uneven surface by a special device.

[0003] For example, a columnar shape such as a window frame or a surface border material, in which the base material decoration surface is two-dimensionally uneven (a shape having a curvature only in one direction (a direction perpendicular to the generating line or the height direction) like a cylinder) One of the curved surface decoration techniques applicable in the case of
No. 5895 has proposed this. That is, the technique of the publication is a surface decoration method by a laminating method, in which a front cover sheet coated with an adhesive is supplied on one side, and one base material is horizontally conveyed at a speed synchronized with the supply speed of the front cover sheet. While maintaining the state in which the ends of the facing sheet are not adhered by a large number of holding jigs, the adhesive-applied surface side of the facing sheet is pressed stepwise on the base material for each small area, and the facing sheet is placed on the base material. It is to be stuck on the surface by heating. This method is called a lapping method.

A curved surface decoration technique applicable to the case where the surface unevenness is a three-dimensional unevenness such as an embossed shape (ie, a shape having a curvature in two directions like a hemispherical surface) is disclosed in, for example, Japanese Patent Application Laid-Open No. 5-139097. There is a proposal in the gazette. That is, the technique of the publication is a surface decoration method by a transfer method, in which a transfer sheet having a structure in which a thermoplastic resin film is used as a support of the transfer sheet, and a release layer, a pattern layer, and an adhesive layer are sequentially provided on the support. Is placed on a substrate having an uneven surface, and is pressed from the back surface of the support with a heat roller made of rubber having a rubber hardness of 60 ° or less, and a pattern is transferred to obtain a decorative material. Further, a foamed layer which foams by heat during transfer is provided between the support and the release layer, and the foaming is also utilized to follow the uneven surface of the substrate.

[0005]

However, of the conventional methods as described above, the technique disclosed in Japanese Patent Publication No. 61-5895 can only handle two-dimensional curved surfaces.
The technique proposed in Japanese Patent Application Laid-Open No. 5-139097 can cope with a three-dimensional curved surface. However, in order to follow the surface unevenness by utilizing elastic deformation of a rotating heat roller by rubber, a shallow embossed shape is required. Is not applicable to large surface irregularities. In addition, the soft rubber roller is liable to be worn by the corners of the unevenness of the transfer substrate. Further, in a configuration in which a foam layer is provided on the transfer sheet, the transfer sheet becomes too complicated and expensive. In addition, there is a problem that the substrate is limited to a flat substrate as a whole.

Accordingly, an object of the present invention is to provide a transfer product such as a decorative material which can be transferred onto a large three-dimensional uneven surface, and which has excellent surface decoration and durability of the surface decoration. Another object of the present invention is to provide a curved surface transfer device which does not require a specially shaped jig and does not require replacement due to wear of parts such as rubber rollers.

[0007]

In order to solve the above-mentioned problems, a curved surface transfer apparatus according to the present invention provides a transfer device comprising a support and a transfer layer on the uneven surface side of a transfer-receiving substrate having an uneven surface. The transfer layer side of the sheet is opposed, the solid particles collide with the support side of the transfer sheet, and using the collision pressure,
An apparatus for performing at least a process until the transfer layer is pressed against the transfer substrate by pressing the transfer sheet against the uneven surface of the transfer substrate to transfer the solid sheet. Solid particle ejection means for ejecting, and solid particle storage / heating means for temporarily storing the solid particles, heating the stored solid particles, and then sequentially sending the solid particles to the solid particle ejection means. .

[0008]

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

[Substrate to be Transferred] The substrate to be used in the present invention may, of course, have a flat surface to be transferred. In particular, the substrate to be transferred has three-dimensional irregularities. A conventional pressing jig (see JP-B-61-5895 described above) and a transfer roller made of rubber (see JP-A-5-139097 described above) essentially have the directionality of the rotating shaft. , The applicable surface irregularities are limited. That is, the former is limited to two-dimensional irregularities having a curvature only in one axial direction, and the latter is capable of transferring to three-dimensional irregularities having a curvature in two axial directions, but the three-dimensional shape can be changed in any direction. Cannot be applied homogeneously. For example, unless the longitudinal direction of the wood grain conduit pattern is parallel to the feed direction of the transfer sheet, it cannot be successfully transferred to the concave portion of the conduit. Moreover, in the latter case, the shape of the base material is practically limited to a flat plate shape, and otherwise, it is impossible unless a transfer roller having a special shape tailored to each base material shape is used.

However, in the present invention, as described later, since the collision pressure of a group of solid particles that behave fluidly is used, the planar direction of the pressure application region is essentially required for the three-dimensional shape of the surface irregularities. Do not have. (This directionality is the direction of the temporal position change of a point on the transfer-receiving substrate to which pressure is applied.) Therefore, a shape having irregularities in the transfer direction of the transfer sheet or the transfer-receiving substrate is considered. The substrate to be transferred may be used. In other words, it means that the present invention can be applied to two-dimensional unevenness having unevenness only in one direction such as only the feed direction or width direction, and three-dimensional unevenness having unevenness in two directions such as both the feed direction and the width direction. In addition, 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 and adhered 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 unevenness having a circular cross section or the like 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 of the concave portion or the inner surface of the concave portion of the irregular surface. . The large irregularities and the fine irregularities are, for example, as shown in the main part enlarged perspective view of FIG. 10, 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.

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 has fine irregularities on the spray painted surface such as stucco, lysine etc., unevenness of stone surface such as granite cleavage surface and travertine marble board Joints, grooves, as a stone-grained uneven pattern having a large pattern, etc.
It has a siding pattern, shaved wood pattern, and a floating wood grain pattern, and a conduit groove as fine irregularities on it, a raised annual ring,
Wood-grain uneven patterns having a hairline or the like can be given.

Each of the surfaces constituting the concave-convex surface is arbitrary, such as only a flat surface, only a curved surface, or a combination of a flat surface and a curved surface. Therefore, the curved surface on the transfer-receiving substrate of the present invention also means an uneven surface having no curved surface composed of only a plurality of flat surfaces, 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.
Non-porcelain ceramic plates such as calcium silicate plate, extruded cement plate, slag cement plate, ALC (lightweight foamed concrete) plate, GRC (glass fiber reinforced concrete) plate, pulp cement plate, wood veneer, etc. Wood plywood, particle board, glued laminated wood, wood board such as wood medium density fiber board (MDF), metal board such as iron, aluminum, copper, ceramics such as ceramics and glass, polypropylene, ABS resin, phenol resin, etc. A resin molded product or the like 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 of 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.

Specific examples of the support include, 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.

Further, if an uneven pattern is provided on the surface of the support which 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 in which a layer is provided to provide a support having a shaping layer. The shaping layer has the function of the release layer.

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

The decorative layer is 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.

The release layer is provided between the support or the release layer and the decorative layer 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 transfer layer can be omitted. The adhesive to be used may be appropriately selected depending on the application, required physical properties, and the like. When a liquid is used as the solid particle accelerating fluid, an adhesive that is insoluble in the liquid is selected.

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

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

A 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-curing heat-sensitive adhesive has the same adhesive strength as a normal heat-melting adhesive, but the cross-linking / curing reaction gradually proceeds with the moisture in the air when allowed to stand naturally. 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 the 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-melt 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 thereof include a polyurethane skeleton having a urethane bond, a polyester skeleton having an ester bond, and a polybutazine skeleton. Adhesive properties can be adjusted by appropriately employing one or more of these skeletal structures. When a urethane bond is present in the molecular chain, the terminal isocyanate group also reacts with the urethane bond to generate an allophanate bond, which also causes a cross-linking reaction.

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

In addition, the moisture-curable heat-sensitive adhesive includes:
In addition to the above-mentioned various polyisocyanate prepolymers, in order to adjust various physical properties, a thermoplastic resin, a tackifier, a plasticizer, a filler (an extender 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. 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 prepolymer or monomer specifically has a radical polymerizable unsaturated group such as a (meth) acryloyl group or a (meth) acryloyloxy group, a cationic polymerizable functional group such as an epoxy group in the molecule. Consisting of a compound having Further, a polyene / thiol prepolymer based on a combination of a polyene and a polythiol is also preferably used. In addition, for example, a (meth) acryloyl group means an acryloyl group or a methacryloyl group.

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

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

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

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

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

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

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

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

Further, various additives can be added to the various resins used for the adhesive, if necessary. These additives include, for example, extenders (fillers) composed of fine powders such as calcium carbonate, barium sulfate, silica, and alumina; 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 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, 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 which are inorganic powders such as glass beads, ceramic beads, zirconia beads, corundum beads and alundum beads, iron, and iron such as carbon steel and stainless steel. alloy,
Metal particles such as aluminum or aluminum alloys such as duralumin, metal beads such as titanium and zinc, or resin beads such as fluororesin beads, nylon beads, silicone resin beads, urethane resin beads, urea resin beads, crosslinked rubber beads, etc. Organic particles and the like, or inorganic / resin composite particles comprising a resin and inorganic particles such as a metal can be used. The shape is preferably spherical,
Spheroidal, polyhedral, scaly, amorphous and other shapes can also be used. As the particle size of the solid particles,
Usually, it is about 10 to 1000 μm.

In the present invention, the solid particles are temporarily stored, and the stored solid particles are heated and then sequentially sent to the solid particle ejection means. FIG. 1 shows an example of the solid particle storage / heating means. In FIG. 1, reference numeral 1 denotes a hopper for temporarily storing solid particles P and sending the solid particles P from below to a jetting device. The supply pipe 3 for supplying P is a conduit having a plurality of outlets 3a in the hopper 1 that penetrates the wall of the hopper 1 from outside. Hot air is sent from a particle heating device (not shown) through the conduit 3, and the hot air is blown out from a plurality of outlets 3 a at the tip of the conduit 3 to heat the solid particles P in the hopper 1. FIG. 1A is a cross-sectional view of the solid particle storage / heating means as viewed from the side.
FIG. 1B is a diagram showing a cross section in the XY plane of FIG. 1A as viewed from above. In addition, although the inside of the hopper is actually filled with solid particles, for convenience of illustration, the solid particles around the conduit 3 are omitted in FIG.
In (B), all the solid particles P are omitted.

As shown in FIG. 2, the hopper-type solid particle storage / heating means divides the inside of the hopper 1 by partition walls 1a and passes the air through the blower pipes 3 to the solid parts in each section. The particles may be heated. This dividing method is effective when the size of the hopper is increased. FIG. 2 is a view of the horizontal section of the hopper 1 as viewed from below.

The temperature of the hot air is not lower than the softening temperature of the transfer sheet, particularly the support thereof, or the temperature at which the adhesive exhibits the adhesive force. Usually, it is 80 to 150 ° C. The wall of the hopper 1 and the conduit 3 are made of a material that can withstand hot air temperature, such as iron or iron alloy,
Desirably, it is insulated from the surroundings by using glass wool, asbestos or the like.

By using the solid particles heated as described above, heat activation of the adhesive and promotion of crosslinking and curing thereof can be achieved.
Alternatively, the extensibility can be improved by heating the transfer sheet together with the pressing of the transfer sheet. In this case, the transfer sheet and the substrate to be transferred may be heated (preheated) to some extent by another heating method before applying 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. To heat solid particles,
In the case where the solid particles are stored in a tank such as a hopper other than the form shown in FIG. 2 and an electric heater provided in the tank or on the outer wall of the tank, heating steam, dielectric heating or induction heating using an electromagnetic field, And the like. Alternatively, these means may be provided on the outer wall of the solid particle transport tube and heated by the transport tube.

[Application of Impact Pressure by Solid Particles] In order to impinge 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. 3 to 6) or an ejector using an ejection nozzle (see FIG. 7) 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 conveys solid particles with a high-speed fluid flow of a fluid using a solid particle acceleration 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 due to gravity, a method of accelerating magnetic particles by a magnetic field, etc. may be employed other than the blowing 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. 3 to 6 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. 5). 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 of the solid particle storage / heating means 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 supplied to the direction controller 816.
Only in the direction allowed by the opening 817 of the
It is supplied between the blades 813 of the outer impeller 812. Then, it collides with the blade 813 and the impeller 81
It is accelerated by the rotation force of 2 and ejects 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. 6 (A) and FIG. 6 (B)
6A and 6B are conceptual diagrams of 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. 6A and 6B, 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. 3, the rotation 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 rotation 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 the hollow cylindrical rotary shaft having an opening for passing through solid particles on the outer periphery is formed as a hollow portion (not shown).

The shape of the blade of the impeller is typically a rectangular flat plate (a rectangular parallelepiped) as shown in FIGS. 3 to 6, but other than this, 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 range of up to 10 blades. Then, by the combination of the shape of the impeller, the number of blades, the rotation speed, the mass and supply speed of the solid particles and the supply direction, the opening size and direction of the directional controller, the ejection direction of the accelerated solid particles, Adjust the ejection speed, projection density, ejection diffusion angle, etc.

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 as 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 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 if 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. 7 shows 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 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.

The blow nozzle includes a blow 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.

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 induction 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 as the solid particles, stainless 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, glycerin and silicone oil can be used. Liquids (as well as gases) can collide with the solid particles along with the transfer sheet. 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, it is easy to transport the solid particles.) Therefore, in the case of a liquid, besides 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 means when the collision pressure is applied, the liquid has a higher specific heat than the gas, so that a greater heating 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.

[Impact Pressure Applied Form] It is possible to use only one jetting device depending on the area of the impact pressure application area. However, when 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 orthogonal to the feeding direction of the transfer sheet and the transfer-receiving base material, and a wide and band-shaped collision region is formed in the width direction. Or,
Even if the ejectors 32 are arranged in a staggered pattern as shown in FIG. 8A or the ejectors 32 are arranged in a row as shown in FIG. May be arranged so as to collide on the upstream side. In the arrangement shown in FIG. 8B, the pressing of the transfer sheet against the transfer substrate by the collision pressure starts from the center in the width direction and gradually presses 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. 8A and 8B, 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. 8B shows an example of such an arrangement, in which a dotted line indicates a pressurized region. In order to lengthen the time for applying the collision pressure, a multistage arrangement in which the ejectors are arranged in two or more rows in the feed direction of the transfer sheet and the substrate to be transferred is preferable.

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

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

First, each of the jetting devices 32a and 32b covers the entire width of the substrate to be transferred conveyed in a single collision pressure application area. Therefore, the transfer sheet and the substrate to be transferred are conveyed. Then, following the collision pressure by the injector 32a, the collision pressure by the injector 32b is received over the entire width. Moreover, a pair of ejectors 32a,
The main solid particles ejected from 32b do not collide perpendicularly with the substrate to be transferred (the envelope surface of the surface to be transferred), but collide obliquely from front, rear, left and right. That is, as shown in the figure, in the substrate transport direction, the rotation axis of the impeller of each ejector is tilted in a direction opposite to each other from horizontal in a plane parallel to the substrate transport direction, and the upstream side and the downstream side are mutually inclined. Collision obliquely from before and after. On the other hand, in the width direction orthogonal to the base material transport direction, the rotation directions of the respective impellers of the ejectors 32a and 32b are set to reverse rotations, and obliquely from the left and right sides on one side and the other side in the width direction. Collide in opposite directions. By arranging such jetting devices, it is possible to apply a uniform isotropic transfer pressure over the entire uneven surface of the substrate to be transferred.

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

The first purpose of the chamber is to prevent the solid particles from leaking into the surrounding working atmosphere. Therefore, the chamber 33b, which is a collision chamber, is provided with a transfer sheet and a transfer port for the substrate to be transferred. Chamber 33 connected by
The air pressure is set lower than a and 33c. Hot air is blown from the hot air blowing nozzle 22 in the chamber 33a, and cool air is blown from the cold air blowing nozzle 24 in the chamber 33c.
a, lower than 33c. The chamber 33c
Also, the solid particles fly inside by the removal of solid particles by the removal roller 35, but the chamber 33c is provided with the cold air blowing nozzle 24 at a portion near the outlet that is connected to the outside on the downstream side of the inside, so that the solid particles from the outlet are Leaks can be 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.

Next, transfer using the apparatus shown in FIG. 9 will be described.

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

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

On the other hand, particles heated by the particle heating device 23 in the hopper 31 are used as the solid particles P.
As shown in FIG. 1, the particle heating device 23 blows hot air Ah from an outlet 3a of a conduit 3 provided inside a hopper to heat solid particles. The heated solid particles are supplied from a hopper 31 to a pair of ejectors 32 using an impeller.
The transfer sheet S is supplied to the transfer sheet S and ejected toward the support side of the transfer sheet S in the chamber 33b which is a collision chamber. Then, the transfer sheet is exposed to collision of solid particles ejected from the ejector. The entire width of the base material in the width direction is covered by the collision pressure application region by one ejector, and the transfer sheet first receives the collision pressure of the solid particles from the ejector 32a, and subsequently changes the collision angle from the ejector 32b. Subjected to impact pressure. Then, as the transfer base material and the transfer sheet are conveyed, the entire region in the longitudinal direction is sequentially exposed to the collision pressure. As a result, the transfer sheet is pressed against the transfer substrate by the solid particle collision pressure, and the transfer sheet is also extended and deformed into the concave portions of the concave and convex surface of the transfer substrate, whereby the irregularities of the transfer substrate are deformed. The transfer layer is molded following the surface shape, and the activated adhesive adheres to the transfer layer. Then, the transfer base material in close contact with the uneven surface to which the transfer sheet is to be transferred is
It is transported to the next chamber 33c which is a post-processing chamber.

A part of the solid particles that have been subjected to the collision with the transfer sheet bypasses both ends of the conveyor belt of the base material conveying device 11 and falls into the lower chamber 33d. Further, the remaining portion is transferred downstream while being placed on the transfer sheet support, and enters the next chamber 33c. Then, first, the solid particles are removed from the transfer sheet by a removing roller 35 using a brush. Although not shown, the removal roller 35 is a roller provided with a bristle of a brush planted so as to form a right and left reverse spiral with respect to the center in the width direction. Due to the rotating spiral, the solid particles are swept from the center toward both ends of the transfer sheet and fall.

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

Then, the adhered transfer substrate and the transfer sheet are forcibly cooled by the cool air blowing nozzle 24, and the remaining solid particles that can be blown off are also removed. After being discharged from the chamber 33c and exiting to the external space, Transfer sheet (support)
Is peeled off from the substrate 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 on the uneven surface of the base material to be transferred is obtained.

On the other hand, the transfer sheet S (support) after passing through the peeling roller 14 is again removed by the second removal roller 36 to remove solid particles that have not been completely removed by the cold air blowing nozzle and adhered. The sheet support is collected on a take-up roll 15. The second removal roller 36 is a roller having a spatula-shaped spiral blade made of plastic that forms a left-right reverse spiral with a center in the width direction as a boundary. The solid particles that have entered the support or adhered by static electricity or the like are lifted and removed by the rotated spiral blade. This is because the solid particles become foreign matters in order to reuse the support as a resource.

In the above description, it is assumed that the curing of the adhesive is completed off-line. However, after pressing the transfer sheet, before or after peeling off the support, 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 device of the present invention has been described above, the present invention is not limited to the items described above. For example, in the apparatus shown in FIG. 9, the transfer sheet is pressed against the base material using a continuous belt-shaped transfer sheet and a single-sheet base material. In this mode, the transfer pressure of the transfer sheet against the substrate to be transferred is stopped only at that time, and the transfer sheet and the substrate to be transferred are intermittently performed for each substrate. (The ejector may be moved with respect to these, for example). Further, the transfer substrate and the transfer sheet may be supplied in the form of a single sheet.

The positional relationship between the direction in which the solid particles are ejected by the ejector and the transfer sheet and the substrate to be transferred is such that both are placed on a horizontal plane, and 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 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, 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. If necessary, use a paint to which an ultraviolet absorber such as benzotriazole or ultrafine cerium oxide, a light stabilizer such as a hindered amine radical scavenger, a coloring pigment, an extender pigment, or a lubricant is 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, embodiments of the present invention will be described.

First, a plate as illustrated in an enlarged perspective view of a main part in FIG. 10 was prepared as a substrate to be transferred B having three-dimensional surface irregularities. The transfer-receiving substrate B is a groove-shaped concave portion 401 of a joint having large pattern unevenness having a depth of 2.0 mm and an opening width of 7 mm.
And a flat protruding portion 402 having a brickwork pattern, and having fine unevenness 403 having a satin finish tone having a depth of 0.1 to 0.5 mm on the flat protruding portion as fine unevenness. And a 12 mm thick calcium silicate plate having three-dimensional surface irregularities in which these large irregularities and fine irregularities overlap.
Then, a base coat and an undercoat were applied to the uneven surface, and an adhesive was further applied thereon in an off-line manner. As the adhesive, a moisture-curable heat-melt adhesive, which is a urethane-based adhesive, was applied as a reactive heat-melt adhesive at a rate of 30 g / m ² .

The transfer sheet has a thickness of 100
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 resin for the binder of the picture ink, an acrylic resin and a vinyl chloride-vinyl acetate copolymer of 8: 2
(Weight ratio), and red pigment, isoindolinone, carbon black, and titanium white were used as coloring pigments.

In the present embodiment, a curved surface transfer device using an impeller as shown in FIGS. 3 to 6 is used as an ejector with the device as shown in FIG. Was placed and transported on a substrate transporting means 11 composed of a conveyor belt with the top facing upward. Then, after the transfer sheet S unwound from the unwinding roll 12 is preheated by the heating roller 21, the transfer sheet S is temporarily fixed by being pressed against the transfer target substrate by a temporary fixing roller 13 made of a rubber roller, and is transferred into the chamber. Supplied as one. In the first chamber 33a, preheating of the transfer sheet, activation of the adhesive, and heating of the substrate to be transferred were performed by hot air Ah from the hot air blowing nozzle 22. In this case, the surface temperature of the support is 10
Heated to 0 ° C.

Next, the average particle size of the solid particles P is set to 0.1.
A 4 mm spherical zinc sphere was heated inside a hopper 31 as a solid particle storage / heating means as shown in FIG. Heated air at 100 ° C. was blown from the opening 3 a of the conduit 3 into the hopper 31 to heat the solid particles to 100 ° C. And
The heated solid particles P are supplied from the lower part of the hopper toward the ejector, are ejected from ejectors 32a and 32b rotating in opposite directions, and collide against the support side of the transfer sheet from front to back and right and left, and the transfer sheet is transferred to the transfer base. It was pressed against the material. The rotation speed of the impeller of each ejector was 3600 rpm, and the ejection speed of solid particles was 35 m / s. Then, the transfer sheet is extended into the concave portion of the joint and heat-fused, so that the chamber 33 b
In the next chamber 33c, the solid particles remaining on the transfer sheet were scraped by the brush of the removing roller 35 toward both ends of the transfer sheet and dropped into the lower chamber 33d. Next, the cold air blowing nozzle 24 blows cold air Ac at 15 ° C. to cool the adhesive and cool it to the bonding temperature or lower, and to blow off solid particles still remaining on the transfer sheet, thereby removing both ends of the transfer sheet. From the chamber 33d. Next, after the 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. The support (S) of the transfer sheet after peeling was removed by a second removing roller 35 to remove partially remaining solid particles, and then wound up by a wind-up roller 15 and collected. The pattern was transferred to the decorative material following the surface irregularities. Further, on the surface of the transfer layer of the decorative material D, an emulsion paint of polyvinylidene fluoride containing 0.5% by weight of a benzotriazole-based ultraviolet absorber is applied to a dry thickness of 10 μm to form a transparent protective layer. A cosmetic material with a transparent protective layer was obtained.

[0094]

According to the present invention, a transfer product such as a decorative material having a large three-dimensional uneven surface decorated can be easily obtained. Of course, two-dimensional irregularities such as a window frame and a sash are also possible, and in addition to a flat plate material, the shape of the entire surface (envelope shape) is a wavy shape like a tile, or a convex or concave curve. Even those having a shape can be easily obtained. Then, by heating the solid particles and then sequentially sending the solid particles to the solid particle ejecting means, the transfer sheet is heated and softened, and the transfer sheet follows the shape of the uneven surface of the base material to be transferred. The adhesive layer can be heated to develop an adhesive force. In addition, it is also possible to transfer on the convex portions of the large irregular surface and inside the concave portions (bottom portions and side surfaces that are the connecting portions between the convex portions and the bottom portion). In addition, a finer uneven pattern (for example,
Even if there is a hairline, satin finish, etc., it is possible to decorate by transferring even into the concave portions of the fine irregularities. Further, unlike the conventional rubber roller pressing method, there is no wear of parts such as the rollers due to the uneven portions of the base material to be transferred. As a result, a decorative material having an extremely excellent design property is obtained, which has not been achieved before.

[Brief description of the drawings]

FIG. 1 shows an example of a solid particle storage / heating means,
(A) is a schematic block diagram, (B) is the XY arrow view.

FIG. 2 (B) shows another example of the solid particle storage / heating means.
FIG.

FIG. 3 is a perspective view showing an example of an ejector using an impeller.

FIG. 4 is a front view of the ejector of FIG. 3;

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

FIG. 6 is an explanatory diagram for adjusting a jetting direction by the jetting device of FIG. 3;

FIG. 7 is a cross-sectional view illustrating an example of an ejector using an ejection nozzle.

8A and 8B are diagrams illustrating an example of an arrangement state of the ejectors, in which FIG. 8A is an arrangement diagram in a staggered lattice state, and FIG. It is an arrangement view of the state where it shifted.

FIG. 9 is a schematic diagram illustrating a specific example of a curved surface transfer device.

FIG. 10 is a perspective view of an essential part showing an example of three-dimensional surface irregularities of a substrate to be transferred.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hopper 2 Supply pipe 3 Conduit 3a Opening 11 Substrate conveying device 12 Unwinding roll 13 Temporary fixing roller 14 Peeling roller 15 Winding furnace 21 Heating roller 22 Hot air blowing nozzle 23 Particle heating device 24 Cold air blowing nozzle 31 Hopper 32a, 32b Chambers 33a to 33d chamber 35 removal roller 36 second removal roller 401 groove-shaped concave part 402 flat 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 dispersion 819, 819a Rotating shaft 820 Bearing 840 Jetting device using blowing nozzle 841 Induction chamber 842 Internal nozzle 843 Nozzle opening 844 Nozzle Ac Cold air Ah Hot air B Transfer substrate D Cosmetic material F Fluid P Solid particles S Transfer sheet

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hirohisa Yoshikawa 1-1-1 Ichigaya-Kagacho, Shinjuku-ku, Tokyo Inside Dai Nippon Printing Co., Ltd.

Claims (1)

[Claims] 1. A transfer sheet comprising a support and a transfer layer, wherein the transfer layer side of a transfer sheet comprising a support and a transfer layer is opposed to the uneven surface side of the transfer-receiving base material having the uneven surface, and solid particles collide with the support side of the transfer sheet. An apparatus for performing at least a process until the transfer layer is pressed against the transfer substrate in order to transfer the transfer sheet by pressing the transfer sheet to the uneven surface of the transfer substrate using the collision pressure. A solid particle ejection means for accelerating and ejecting the solid particles, and a solid particle storage / heating means for temporarily storing the solid particles, heating the stored solid particles, and sequentially sending the solid particles to the solid particle ejection means. A curved surface transfer device characterized by the above-mentioned.