JPH1134595A - Method and apparatus for transferring curved surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently manufacture a decorative material having three- dimensional protrusion and recess surface. SOLUTION: The method for transferring a curved surface comprises the steps of opposing a transfer layer side of a transfer sheet S made of a support sheet 1 and the transfer layer to a protrusion and recess surface side of a base material B to be transferred, colliding solid particles P injected from an injector 32 to a support sheet 1 side of the transfer sheet, bringing the transfer sheet S into pressure contact with the material B by the collision pressure, then releasing the sheet 1, transferring the transfer layer to overall surface from a recess part to protrusion part of the material B, then gradually inclining the sheet 1 of the sheet S obliquely upward to the transfer surface of the material B to remove it, and then dropping the remaining particles P sidewisely to recirculate it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curved surface for transferring a pattern to a substrate having an uneven surface, particularly, a decorative plate having an uneven surface such as exterior and interior materials of a house, furniture, and home appliances. The present invention relates to a transfer method and apparatus.

[0002]

2. Description of the Related Art Conventionally, decorative boards having decorations such as pictures on a substrate surface of the decorative board by a direct printing method, a laminating method, a transfer method or the like have been used for various purposes. In this case, if the surface of the base material is flat, the decoration of the picture can be easily made, but the decoration of the pattern 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, and a substrate 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. 895 has proposed this. That is, the technology of the same publication is a surface decoration method by a laminating method, in which a front cover sheet coated with an adhesive on one side is supplied, while the base material is horizontally conveyed at a speed synchronized with a 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 provided in parallel, the adhesive application side of the facing sheet is pressed stepwise with respect to the base material for each small area, and the facing sheet is pressed. It is to be adhered by heating to the substrate surface. This method is called a lapping method.

A curved surface decoration technique applicable to the case where the surface irregularities are three-dimensional irregularities such as an embossed shape (ie, a shape having a curvature in two directions like a hemisphere) is disclosed in, for example, JP-A-5-139997. It is proposed in the gazette. That is, the technique of the same publication is a surface decoration method by a transfer method, using a thermoplastic resin film as a support sheet of a transfer sheet, a release layer, a picture layer, and an adhesive layer are sequentially provided on the support sheet. A decorative sheet is obtained by placing a transfer sheet having a configuration on a substrate having an uneven surface, pressing the back surface of the support sheet with a rubber heat roller having a rubber hardness of 60 ° or less, and transferring a pattern. It is. Further, a foamed layer which foams by heat during transfer is provided between the support sheet and the release layer, and the foaming is also utilized to follow the uneven surface of the base material.

[0005]

However, according to the conventional method as described above, for example, the technique disclosed in Japanese Patent Publication No. 61-5895 can only handle a two-dimensional curved surface. Although the technology proposed in Japanese Patent No. 139097 can cope with a three-dimensional curved surface, it basically follows the surface unevenness by utilizing the elastic deformation of the rotating heat roller due to rubber. 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-receiving substrate. Further, in a configuration in which a foam layer is provided on the transfer sheet, the transfer sheet becomes too complicated and expensive. There is also a problem that the substrate is limited to a flat substrate as a whole.

Therefore, the present invention requires a specially shaped jig for pressing the transfer pressure because a transfer pattern can be reliably formed even on a large three-dimensional uneven surface, so that excellent surface decorativeness can be obtained. It is an object of the present invention to provide a curved surface transfer method and a transfer device therefor that do not require replacement due to wear of a component such as a rubber roller.

[0007]

Therefore, in order to solve the above-mentioned problems, in the curved surface transfer method of the present invention, first, a transfer sheet comprising a support sheet and a transfer layer is pressed against and pressed against a substrate to be transferred. As a means, solid particles were made to collide with the support sheet side of the transfer sheet, and the collision pressure was used. That is, the transfer layer side of the transfer sheet including the support sheet and the transfer layer is opposed to the uneven surface side of the transfer-receiving base material carried in by the base material transfer means, and the solid particles are provided on the support sheet side of the transfer sheet. The transfer sheet is pressed against the uneven surface of the substrate to be transferred by using the collision pressure, and after the transfer layer adheres to the substrate to be transferred, the support sheet of the transfer sheet is peeled off. Thus, the transfer layer was transferred to the substrate to be transferred. At this time, the support sheet is removed such that the surface thereof is gradually inclined obliquely upward with respect to the transfer surface of the substrate to be transferred, whereby the solid existing on the support sheet is removed. The particles can be removed to the side of the substrate to be transferred. According to this method, the transfer layer can be reliably transferred to the inside of the concave portion, and the continuous circulating use of the solid particles becomes extremely easy, thereby improving the productivity.

The curved surface transfer apparatus of the present invention is an apparatus used for performing the above-mentioned curved surface transfer method, and includes means for pressing a transfer sheet toward a substrate to be transferred.
A solid particle ejection means for ejecting solid particles is provided,
Substrate transporting means for transporting the substrate to be transferred to a position facing the solid particle ejecting means, and transfer sheet supplying means for positioning the transfer sheet between the solid particle ejecting means and the transferred substrate,
A support sheet take-up roll for winding the support sheet of the transfer sheet after the transfer layer is adhered to the transfer base material such that the surface of the transfer sheet is gradually inclined obliquely upward with respect to the transfer surface of the transfer base material. And at least. With this configuration, it is possible to easily obtain a decorative material in which the transfer layer is reliably transferred to the inside of the concave portion, and the solid particles on the support sheet wound by the winding roll are on the side of the transfer path of the substrate to be transferred. And the continuous circulation and use of the solid particles becomes extremely easy, so that a curved surface transfer device with high productivity can be obtained.

In a preferred aspect, the transfer sheet supply means further includes transfer sheet support means disposed along both sides of the substrate to be transferred, wherein both side portions of the supplied transfer sheet are provided. The sheet is guided by the transfer sheet supporting means. With this configuration, it is easy to cause the contact of the transfer sheet to the transfer-receiving substrate from the center in the width direction to the side, and it is possible to avoid the occurrence of transfer failure due to remaining air.

In a preferred embodiment, the substrate transporting means has a belt conveyor for transporting the substrate to be transferred, and the transfer sheet supporting means is in contact with the transporting surface of the belt conveyor and rotates endless belt synchronously. In the area where the solid particles are ejected by the solid particle ejecting means, both side portions of the transfer sheet are pressed and clamped between the conveying surface of the belt conveyor and the endless belt. With this configuration, the solid particles are prevented from wrapping around to the back surface of the transfer sheet, and it is possible to reliably prevent the solid particles from entering between the base material to be transferred and the transfer sheet and causing transfer failure. . Further, it is possible to reliably prevent the peeling of the support sheet caused by the winding of the support sheet by the winding roll from going back to the collision pressure applying portion of the solid particles.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method for transferring to an uneven surface according to the present invention will be described below. 1 and 2 are conceptual diagrams outlining the present invention. The uneven surface (40 in FIG. 1) of the transfer-receiving substrate B conveyed by a conveying unit (not shown)
3, 401), preferably, for example, a sponge roller R
Is applied to form an adhesive layer 4 (right side in FIG. 2). Next, the transfer layer 2 side of the transfer sheet S including the support sheet 1 and the transfer layer 2 is made to face the uneven surface side of the transfer-receiving substrate B having the uneven surface (FIG. 1A). A large number of solid particles P ejected from an ejector 3 (solid particle ejection means), which will be described later, collide with the support sheet 1 side of the sheet S, and the collision pressure is used as a transfer pressure to transfer the transfer sheet S. It is pressed against the substrate to be transferred B (FIG. 1B). Accordingly, the transfer layer 2 can be adhered to the uneven surface of the transfer-receiving substrate B by following the uneven surface of the transfer-receiving substrate B. Thereafter, the support sheet 1 of the transfer sheet S is peeled and removed so that the support sheet 1 is gradually inclined obliquely upward with respect to the transfer surface of the base material B (FIG. 1C). The upper solid particles P are reliably removed to the side of the transfer substrate B, and the decorative plate D in which the transfer layer 2 is transferred to the uneven surface of the transfer substrate B is obtained (see FIG.
(D)). The excluded solid particles P are recirculated as described later, and are used again as the solid particles P ejected from the ejector 3. Hereinafter, the present invention will be described in more detail.

[Substrate to be Transferred] First, as the substrate to be transferred B of the present invention, a substrate whose surface to be transferred has an uneven surface is used.
The present invention achieves the intended purpose even if the unevenness is a three-dimensional unevenness. In a conventional holding jig that makes rotational contact (the aforementioned Japanese Patent Publication No. 61-5895) or a rubber transfer roller (see the aforementioned Japanese Patent Application Laid-Open No. 5-139097), the directionality of the rotating shaft is essentially changed. Due to this, applicable surface irregularities are restricted. That is, the former is 1
It is limited to two-dimensional unevenness having a curvature only in the axial direction. In the latter case, even if transfer to three-dimensional unevenness having a curvature in the two-axis direction is possible, the three-dimensional shape cannot be uniformly applied to an arbitrary direction. 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 will be described later, the collision pressure of a group of solid particles that can behave fluidly is used as the transfer pressure. (The direction refers to the direction of a temporal change in the position of a point on the substrate to which pressure is applied). Accordingly, a transfer base material having a shape having irregularities in the transfer direction of the transfer sheet or the transfer base material 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,
This means that the present invention can be applied to three-dimensional irregularities having irregularities in two directions, such as both the feed direction and the width direction. In addition, the point that the collision pressure of the solid particles does not have directionality is that a single sheet transfer sheet is placed on the substrate to be transferred, and an ejector that ejects the solid particles is pressed so as to be in close contact with each other one by one. It can be easily understood by considering how the transfer sheet and the transfer-receiving substrate are moved by moving or fixing the ejector, and the region where the collision pressure is applied moves.

Further, the substrate to be transferred is not limited to a flat plate material (envelope surface shape) as a whole, but has a two-dimensional unevenness whose cross section is convex or concave in an arc shape and curved in the feeding direction or width direction. It may be a material, or its curved surface may have finer three-dimensional surface irregularities. In the present invention, whether to transfer the two-dimensional unevenness such as an arc shape 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. is there. The large pattern unevenness and the fine unevenness are, for example, as described in detail later, as shown in FIG.
2 has fine irregularities 403 on the upper surface, and the large irregularities have a step of about 1 to 10 mm and a width of the concave of 1 to 1 mm.
About 0 mm, the width of the protrusion may be about 5 mm or more, and the fine unevenness is smaller than the large unevenness in both the step and the width, and specifically, the step is 0.1 to About 5 mm, the width of the concave portion and the width of the convex portion are 0.1
mm or more, and may be less than about の of the width of the convex portion of the large uneven shape.

As a specific example of an uneven pattern of a decorative material having a combination of large and small irregularities and fine irregularities and having three-dimensional surface irregularities, for example, there are joints and grooves as large irregularities. It has a two-dimensional array pattern of tiles, bricks, stones, etc., and has fine irregularities on the spray painted surface such as stucco, lysine etc. Woodgrain pattern with a joint pattern, groove, stirrup, sane, etc., as a large uneven pattern, or a floating woodgrain pattern, and a fine groove with a conduit groove, hairline, etc. Uneven pattern.

Each of the surfaces constituting the uneven surface can be arbitrarily selected from a plane only, a curved surface only, or a combination of a plane and a curved surface. Therefore, the curved surface on the substrate to be transferred according to the present invention also means an uneven surface having no curved surface composed of only a plurality of flat surfaces, such as a tooth profile of a clog. Further, the curvature in the present invention includes a case where the curvature is infinite (the radius of curvature = 0) which is angular like the periphery of a side or a vertex of a cube. 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, ALC (lightweight foamed concrete) plate, GRC (glass fiber reinforced concrete) plate, slag cement plate, wood veneer, wood plywood, particles A board or a wood board such as a wood medium-density fiber board (MDF), a metal board such as iron, aluminum, or copper, ceramics such as ceramic or glass, and a resin molded article such as polypropylene, ABS resin, or phenol resin may be used. .

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

[Transfer Sheet] As shown in FIGS. 1 and 2, the transfer sheet S is composed of a support sheet 1 and a transfer layer 2 to be transferred. The transfer layer 2 comprises at least a decorative layer.

(Support Sheet) The support sheet 1 may be made of paper having no stretchability, provided that the substrate to be transferred has a two-dimensional uneven surface. In order to apply to the original uneven surface, it is desirable to use a stretchable support sheet at least at the time of transfer.
Due to the stretchability, when the collision pressure of the solid particles is applied, the transfer sheet can be closely adhered and transferred to the inside of the concave portion on the surface of the transfer-receiving substrate. The stretchability of the entire transfer sheet is mainly governed by the stretchability of the support sheet. Therefore, in addition to a conventionally known thermoplastic resin film, a rubber film that can be stretched even at room temperature can be used as the support sheet. In the case of a thermoplastic resin film, there is almost no stretchability when forming a transfer layer such as a decorative layer, and during transfer, sufficient stretchability is exhibited by heating, and after cooling, the deformed shape is maintained, and the shape is restored by elasticity. It is preferable that the transfer sheet does not cause the transfer, and a transfer sheet that can be used in the present invention can be prepared easily as in the case of a conventionally known ordinary transfer sheet.

As a specific example of the support sheet, even in the case of a biaxially stretched polyethylene terephthalate film which has been widely used in view of stretchability, depending on the surface unevenness,
By setting heating conditions, collision pressure conditions, and the like, necessary and sufficient stretchability can be developed, so that transfer to an uneven surface is possible.However, a material that easily develops stretchability at low temperature and low pressure, for example, poly Low stretch or no copolymer polyester film such as butylene terephthalate or ethylene terephthalate isophthalate copolymer, polyolefin film such as polypropylene film, polyethylene film, polymethylpentene film, polyvinyl chloride resin film, nylon film, etc. Stretched films, rubber (elastomer) films such as natural rubber, synthetic rubber, urethane elastomers and olefin elastomers are also preferred support sheets. The thickness of the support sheet may be usually from 20 to 100 μm.

The support sheet may be provided, if necessary, 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 sheet when the support sheet 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.

Further, if an uneven pattern is provided on the surface of the support sheet 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 pears, hairlines, parallel grooves, irregularities on the cleavage face of granite, wood conduit grooves, wood rings, patterns on the surface of cloth, squeezing, letters, geometric patterns, etc. In addition, the formation of the concavo-convex pattern is performed by embossing, sandblasting, and hairline processing by hot pressing on a resin sheet as a support sheet, or using a resin having releasability as a binder on the support sheet. Using ink (made of two-component cured urethane, silicone resin, melamine resin, monomer or prepolymer of polyfunctional acrylate or methacrylate cross-linked by ultraviolet light or electron beam, etc.), emboss printing by silk screen printing or the like on desired uneven pattern To form a support sheet having a shaping layer. The shaping layer also has the function of the release layer.

(Transfer Layer) The transfer layer is composed of at least a decorative layer, and a release layer, an adhesive layer, etc. may be a component of the transfer layer as appropriate. The decoration layer is a gravure print, a silk screen print, a pattern layer printed with a pattern or the like by a conventionally known method such as offset printing, and a material, and a metal such as aluminum, chromium, gold, and silver is partially formed using a known vapor deposition method or the like. It may be a metal thin film layer or the like formed on the target or on the entire surface. Patterns include wood grain, stone grain, cloth grain, tile tone, brick tone, leather pattern, character, geometric pattern, and the entire surface in accordance with the surface irregularities (particularly, convex surface) of the substrate to be transferred. Use solid or the like.

In the case where the transfer layer is formed of a pattern, it is preferable to select a transfer layer in which the misregistration with the concave and convex shape of the substrate to be transferred is not conspicuous. For example, in the case of a wood grain pattern, it is a pattern of a root nodule heather or a board grain material, in the case of a stone grain pattern, it is granite, marble, grain, and in the case of a geometric pattern, it is a polka dot. Even in the case of a pattern such as a flower pattern or an arabesque pattern, the position of the pattern is limited to only the convex portion of the base material to be transferred, and is sufficiently separated from the edge of the concave portion such as the joint groove (more than the deviation of the register). If they are arranged only in the area, no problem occurs.

The picture layer ink comprises a vehicle such as a binder, a coloring agent such as a pigment or a dye, and various additives appropriately added thereto. A single material such as an acrylic resin, a vinyl chloride-vinyl acetate copolymer, a polyester resin, a cellulosic resin, a polyurethane resin, a fluororesin, or the like, or a mixture containing these is used for the binder. As the pigment of the colorant, inorganic pigments such as titanium white, carbon black, red iron oxide, graphite, and ultramarine blue, and organic pigments such as aniline black, quinacridone, isoindolinone, and phthalocyanine blue are used.

A release layer is provided between the support sheet or release layer and the decorative layer for the purpose of adjusting the release property between the decorative layer and the surface of the decorative layer after transfer. This is the same as a conventionally known transfer sheet. 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. Further, as a means for easily removing air remaining between the transfer sheet and the transfer-receiving substrate at the time of transfer, a large number of small holes penetrating through all layers of the transfer sheet may be formed in the transfer sheet as necessary. .

[Adhesive] The adhesive may be applied only to the transfer layer 2 side of the transfer sheet S, only to the transfer base material B side, or to the transfer base material B side.
It can be provided on both the side and the transfer layer 2 side. When an adhesive layer is provided on the substrate B to be transferred, the adhesive layer is applied by online coating immediately before transfer or offline coating in advance. When an adhesive layer is provided as one of the transfer layers of the transfer sheet,
Either online coating just before transfer or offline coating in advance may be provided. 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, a substance that is insoluble in the liquid is selected.

As the adhesive to be used, for example, a heat-sensitive adhesive, a moisture-curable heat-sensitive adhesive, a two-part curable adhesive, an ionizing radiation-curable adhesive, a water-based adhesive, or a pressure-sensitive adhesive using an adhesive Various adhesives such as agents can be used. When water is used for the solid particle accelerating fluid, a moisture-curable adhesive or an aqueous adhesive should be avoided.

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 viewpoint that the bonding is completed in a short time, a heat fusion type (heat-sensitive adhesive) is preferable. The adhesive is solvent-diluted or solventless,
Alternatively, either a liquid or a solid at room temperature may be used, and they are appropriately used. 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 obtained by condensation polymerization of dimer acid and ethylenediamine. A conventionally known adhesive such as a resin 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. Moisture-curing heat-sensitive adhesives are composed of a prepolymer having an isocyanate group at the molecular end as an essential component. The curing reaction proceeds with moisture in the air when left naturally, so it is transferred in terms of work stability. Apply immediately before. Immediately after the 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 left unattended. It is excellent in heat resistance without creep deformation and heat melting, and a large adhesive strength can be obtained. However, in order to promote crosslinking and curing of the adhesive by moisture after the transfer is completed, the decorative board after the transfer is left to cure in air containing moisture. Preferable atmospheric conditions for re-curing are generally a relative humidity of 50% RH or more and a temperature of 10 ° C. or more. temperature·
When the relative humidity is higher, the curing is completed in a shorter time.
Typical cure completion times are typically 20 ° C, 60%
It is about 10 hours in an atmosphere of RH.

The ionizing radiation-curable resin which can be used as the ionizing radiation-curable adhesive is a composition curable by ionizing radiation, and specifically includes a radical polymerizable unsaturated bond or a cationic polymerizable functional group in the molecule. A prepolymer (including a so-called oligomer) having a group and / or a composition which is appropriately mixed with a monomer and which can be cured 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 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 polyene and polythiol is also preferably used. In addition, for example, a (meth) acryloyl group is
It means an acryloyl group or a methacryloyl group.

Examples of the above prepolymer include urethane (meth) acrylate prepolymer, epoxy (meth)
Examples of the above monomers such as acrylate prepolymers include dipentaerythritol hexa (meth) acrylate, trimethylolpropane tri (meth) acrylate, and the like.

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, benzoin, benzoin methyl ethers can be used alone or in combination as a photopolymerization initiator. In the case of a resin system having a cationically polymerizable functional group, an aromatic diazonium salt, an aromatic sulfonium salt, an aromatic iodonium salt, a metallocene compound, a benzoinsulfonic acid ester, or the like is used alone or as a mixture as a photopolymerization initiator. be able to. In addition,
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 an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc lamp, and a black light is used. As a wavelength of the ultraviolet light, a wavelength range of 190 to 380 nm is usually mainly used. As the electron beam source, Cockcroft-Walton type,
Van degraft type, Resonant transformer type, Insulated core transformer type,
Alternatively, an electron beam having an energy of 100 to 1000 keV, preferably 100 to 300 keV using various types of electron beam accelerators such as a linear type, a dynamitron type, and a high frequency type is used.

If necessary, a thermoplastic resin such as a vinyl chloride-vinyl acetate copolymer, polyvinyl acetate, an acrylic resin, or a cellulose 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 that irradiates an ultraviolet ray or an electron beam to a transfer device onto an uneven surface can be incorporated. The irradiation is performed during, after, or after and after the application of the collision pressure.

Further, various additives may be further added to the various resins used for the adhesive, if necessary. These additives include, for example, extenders (fillers) composed of fine powders such as calcium carbonate, barium sulfate, silica, and alumina; In this case, the adhesive may be added to prevent the adhesive from flowing from the convex portion to the concave portion).

In order to apply the adhesive to a transfer substrate or a sheet such as a transfer sheet, the form of a solution (or dispersion) dissolved (or dispersed) in a solvent (or dispersion medium) such as water or an organic solvent is used. Or a room temperature liquid uncured resin is applied in the form of a solventless resin liquid.

The coating method is optional, but preferably, a sponge roller is used for the surface to be transferred which is the uneven surface of the substrate to be transferred. In the case of coating with a sponge roller, FIG.
What is necessary is just to apply by the coating method as shown in FIG. When used without adding a diluting solvent, solvent drying is unnecessary. For example,
Each of the heat-sensitive adhesives can be used as a solventless hot melt adhesive. 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 application amount of the adhesive varies depending on the composition of the adhesive, the type of the substrate to be transferred, and the surface condition, but is usually 10 to 200 g / m ² (solid content).
It is about.

The heat-melting adhesive is used as the adhesive, and the timing of heating to activate and heat-bond the adhesive is before applying the collision pressure, during the application of the collision pressure, or before and during the application of the collision pressure. Either may be used. The heating of the adhesive is performed by heating the substrate to be transferred. When the adhesive is also applied to the transfer sheet, the transfer sheet may be further heated. Alternatively, in some cases, even when the adhesive is applied only to the substrate to be transferred, the transfer sheet to which the adhesive has not been applied may be heated. Further, for the heating during the application of the collision pressure, heated solid particles or a fluid for accelerating the solid particles may be used as the heating fluid.

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

[Application of Adhesive to Transferred Substrate and Pressure Contact of Transfer Sheet] Before transfer onto the transferred substrate B, an adhesive, a sealing agent, an easily-adhesive primer, a primer coating, etc. When painting, spray painting, curtain flow painting,
Coating methods such as brush coating and sponge roller coating can be used. Among these, sponge roller coating is preferable for efficiently and uniformly coating the uneven surface. Preferably, the sponge roller used is a roller (cylindrical) made of elastic sponge, and the sponge material is a rubber elastic body such as silicone rubber or fluoro rubber. Silicone rubber and fluororubber have heat resistance and are also suitable for coating by heating the coating liquid to reduce the viscosity.

As the sponge roller, a roller having a structure in which a periphery of a rigid shaft core R1 made of iron or the like is covered with a sponge R2 as shown in FIG. 3 is usually used. The sponge has a large number of cellular bubbles inside a rubber elastic body. Regarding the structure of the sponge, each cell may be either a closed cell independent of each other or an open cell communicating with each other. This is because the shape followability of the sponge roller to the uneven surface of the transfer-receiving substrate is mainly due to the bubble structure having bubbles. Since the sponge roller has excellent characteristics in terms of this shape following property,
In particular, the effect of the sponge roller is more remarkable when the transfer substrate having a large surface unevenness is applied to the inside of the concave portion than when applied by a solid rubber roller. For example, the coating liquid can be applied to the entire surface including the concave portions of the surface irregularities having a depth of several mm to several tens of mm. The application of the coating liquid by the sponge roller may be performed plural times. The rubber hardness of the sponge roller is not particularly limited, and it is preferable that the sponge roller is soft because it is not for pressurization, but only for contacting the surface thereof or for extruding the coating liquid present in bubbles inside the roller. The diameter of the roller is not particularly limited, but is usually 100 mm to 30 mm.
It is about 0 mm. Although the sponge roller may be non-rotating, it is preferable to rotate the sponge roller around the axis R1 and synchronize its peripheral speed with the feed speed of the transfer-receiving substrate. The method of supplying the coating liquid to the sponge roller is not particularly limited,
For example, as shown in FIG. 3, the coating liquid may be supplied between the sponge roller R and the roller 5 that rotates in the reverse direction with respect to the sponge roller R. The coating liquid on the roller 5 is scraped off by a doctor blade 6.

[Solid Particles] Solid particles P used for pressing the transfer sheet S are inorganic powders such as glass beads, ceramic beads, calcium carbonate beads, alumina beads, zirconia beads, alundum beads and corundum beads. Metallic inorganic particles, iron, carbon steel, iron alloys such as stainless steel, aluminum, aluminum alloys such as duralumin, metal particles such as metal beads such as titanium and zinc, or fluorine resin beads, nylon beads, silicone resin beads, Organic particles such as resin beads such as urethane resin beads, urea resin beads, phenol resin beads, and crosslinked rubber beads can be used. In addition,
When liquid water is used for the solid particle acceleration fluid, the solid particles are preferably non-metals such as stainless beads, glass beads, ceramic beads, and resin beads that do not rust or corrode with water. 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 10 to 1000
It is about μm.

Incidentally, 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. 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, the transfer sheet, the base material to be transferred, the adhesive, etc., which need to be heated by another heating method, are sufficiently heated, and the cooling solid particles are used for the formation, adhesion and cooling of the transfer sheet. It can be done at the same time.

In order to cool or cool the solid particles, when the solid particles are stored in a tank such as a hopper,
What is necessary is just to perform by a heating means and a cooling means by the electric heater, heating steam, a refrigerant | coolant etc. which were provided in the tank and the outer wall of a tank. Further, these means may be provided on the outer wall of the solid particle transport tube, and heating or cooling may be performed in the transport tube. Alternatively, when a fluid is used for accelerating the solid particles, a cooled or heated fluid may be used to cool or heat the solid particles by heat conduction from the fluid. In this case, by causing the fluid to collide with the transfer sheet, the fluid can be used as a heating or cooling unit together with the solid. Alternatively, when 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 and heated during storage.

[Impact pressure application by solid particles] Solid particles P
Is applied to the transfer sheet S to apply a collision pressure and press the transfer sheet S against the substrate B to be transferred. And collides with the transfer sheet S. As the solid particle ejecting means, an ejector using, for example, a rotating impeller as a particle accelerator, or an ejector using an ejection nozzle is used. The ejector using the impeller accelerates and ejects solid particles by rotation of the impeller.
An ejector using an ejection 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. The centrifugal blast device accelerates and ejects solid particles by the rotational force of the impeller. A pressurized blasting device ejects solid particles together with air while being mixed with compressed 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 using free fall due to gravity, a method of accelerating magnetic particles by a magnetic field, or the like may be employed other than the ejection nozzle and the impeller. Is also possible. In the case of an impeller, a solid particle ejecting unit using gravity and a magnetic field, the solid particles can be ejected toward the transfer sheet in a vacuum.

FIG. 4 to FIG. 7 are conceptual diagrams of an example of an impeller that can be used as a particle accelerator of an ejector. These correspond to centrifugal blasting devices used in the blasting field. In the drawing, the impeller 812 has a plurality of blades 813 fixed on both sides by two side plates 814, and a rotation center portion is a hollow portion 815 without the blades 813. Further, the direction controller 8 is provided in the hollow portion 815.
16 (see FIGS. 6 and 7). Direction controller 816
Is a hollow cylindrical member having an opening 817 that is partially open in the circumferential direction and has the same rotation axis as the rotation axis of the impeller 812, and is rotatable independently of the impeller 812. ing.
When using the impeller, the opening 817 of the direction controller 816 is fixed so as to face an appropriate direction. Further, inside the directional controller, another impeller having a hollow inside and the same rotation axis as the rotation axis of the impeller 812 is provided as a sprayer 818 (see FIG. 6). The sprayer 818 is the outer impeller 81
Rotate with 2. 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. Rotates. The rotating shaft 819 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 are supplied from above (directly above or obliquely above) the impeller. The solid particles P supplied into the sprayer scatter outside by the impeller of the sprayer. The scattered solid particles 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 ejects from the impeller.

The ejection direction of the solid particles P is substantially vertically downward as shown in FIGS. 4 and 5, but may be obliquely downward (not shown). FIGS. 7A and 7B show a direction controller 81.
FIG. 7A is a conceptual diagram of ejection direction control for adjusting the ejection direction of solid particles by setting the direction of the opening 817 of FIG.
In (B), the direction controllers 816 are fixed at the illustrated positions, respectively). 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. 5, the rotary shaft 819 is configured so as not to penetrate to the hollow portion 815 only outside the side plate 814. In addition, the rotary shaft 819 is thinner than the diameter of the hollow portion. May be penetrated into the hollow portion, or the inside of a hollow cylindrical rotary shaft provided with an opening through which solid particles pass may be used as a hollow portion (not shown).

The shape of the blade 813 is typically a rectangular flat plate (a rectangular parallelepiped) as shown in FIG. 4 to FIG. 7, but it is also possible to use a curved curved plate, a propeller shape such as a screw propeller, or the like. Yes, select according to application and purpose. Also,
The number of blades is usually selected from a plurality of blades, up to a range of about 10 blades.

The combination of the shape, the number, the rotation speed of the impeller, the mass and the supply speed and the supply direction of the solid particles, the opening size and the direction of the direction controller, and the ejection (blow) direction of the accelerated solid particles, Adjust the ejection speed, projection density, ejection diffusion angle, etc. FIG. 8 is a conceptual diagram showing another example of the impeller. The impeller 812a shown in the drawing has a structure in which a plurality of flat blades 813a are fixed on both sides by two side plates 814a. Usually, the solid particles P are supplied from above (directly above or obliquely above) the impeller. Also, the side plate 8
14a also regulates the ejection direction in the width direction with respect to the rotating shaft 819a. By adjusting the shape, the number, the rotation speed, the mass of the solid particles, the supply speed and the supply direction of the impellers, the direction of the ejection (spout) of the accelerated solid particles, the ejection speed, the projection density, the ejection diffusion angle, etc. are adjusted. .

Further, the impellers such as the above-mentioned impellers 812 and 812a are further provided, if necessary, with an opening only at a portion for ejecting and ejecting solid particles, and an ejection guide (not shown) for covering the periphery of the other impeller. By providing, the ejection direction of the solid particles can be aligned, and the ejection direction of the 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 impellers such as the impellers 812 and 812a are usually about 5 to 60 cm in diameter, and the width of the impeller is 5 to 20 c.
m, the length of the impeller is about the diameter of the impeller, and the rotation speed of the impeller is about 500-5000 [rpm]. The ejection speed of the solid particles is about 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. Since the solid particles are accelerated by contact with the blade, it is preferable to use a high chromium cast steel or ceramic having good wear resistance for the blade.

[Blowing Nozzle] FIG. 9 shows a conceptual diagram of an example of a blowing device 840 using a blowing nozzle as a solid particle blowing means for blowing the solid particles P 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 for blowing 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 an appropriate pressurized tank (not shown) is ejected from the internal nozzle 842 and ejected from the nozzle opening 843 of the nozzle 844 through the guide chamber 841, the fluid F is ejected. In the induction chamber 841 in the vessel, a negative pressure is created by the action of the fluid flow flowing at a high speed, and the negative pressure guides and mixes the solid particles P into the fluid flow F, accelerates and transports the solid particles P with the fluid flow. , From the nozzle opening 843 of the nozzle 844 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 solution is discharged from the nozzle opening of the blowing nozzle. What gushes etc. is used.

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

The material of the ejector such as the induction chamber and the nozzle portion may be appropriately selected from ceramics, steel, titanium, titanium alloy and the like according to the type of fluid. Since the solid particles pass through the inner wall of the ejector, when metal beads or inorganic particles are used as the solid particles, the particles are hard, and therefore a ceramic having good wear resistance may be used. 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, a titanium alloy, a synthetic resin, or ceramic is used. However, steel or the like may be used if the surface is waterproofed.

[Fluid] When the fluid F is a solid particle accelerating fluid, the solid particles P are accelerated and conveyed by the fluid flow to eject the solid particles P together with the fluid F from the solid particle ejecting means (e.g., an ejection nozzle). ). The fluid F is a solid particle acceleration fluid for accelerating the solid particles P. Fluid is gas,
Although both liquids can be used, gas that is easy to handle is usually used.

The gas is typically air, but may be carbon dioxide, nitrogen or the like. The liquid is not necessarily limited, but is non-flammable, easy to dry, non-toxic, low-cost,
Water is one of the preferred materials because of its availability and the like.
In addition, nonflammable liquids such as chlorofluorocarbon, glycerin and silicone oil can be used. A liquid (as well as a gas) can be impinged on the transfer sheet along with the solid particles. Naturally, liquid has a higher density than gas, so liquid is easier to accelerate when solid particles are accelerated by a fluid flow than gas, and when liquid collides with a transfer sheet, Even at the same collision speed, the collision pressure is higher than that of gas and a practical collision pressure can be obtained (and the solid particles can be easily transported because the density difference with the solid particles is small). Therefore, in the case of a liquid, in addition to the collision pressure of the solid particles, the collision pressure of the liquid can be used as the transfer pressure, so that a higher transfer pressure can be applied. A large one can be obtained by the molding effect of following and molding.

When a fluid is used as the heating or cooling means when the collision pressure is applied, the liquid has a higher specific heat than the gas, so that a greater heating or cooling effect can be obtained. In addition, when the liquid is an electric conductor such as water, explosion-proof measures against electrostatic charging are easier than in the case of a gas.

[Collision Pressure Application Mode] Although it is possible to use only one ejector depending on the area of the collision pressure application area,
When the required area is large, a plurality of the areas may be used so that the collision area of the solid particles colliding with the transfer sheet S has a desired shape. For example, the transfer sheet S and the transfer base material B
A plurality of rows are arranged in a straight line in the width direction orthogonal to the feeding direction of the belt to make a wide, band-shaped collision area linear in the width direction. 10 (A) is a staggered arrangement, and FIG. 10 (B) is a single-row arrangement, in which the center in the width direction collides on the upstream side in the feed direction. It is. In the arrangement shown in FIG. 10B, the pressing of the transfer sheet S against the transfer target substrate by the collision pressure starts from the center in the width direction and is sequentially pressed toward both ends in the width direction. In this way, while holding the air in the center in the width direction,
The transfer sheet S can be prevented from adhering to the transfer-receiving substrate B. When a plurality of ejectors are arranged in the width direction as shown in FIG. 10, it is preferable that the pressurizing regions of the individual ejectors partially overlap each other and are arranged so that the ejectors can be pressurized over the entire width. FIG. 10B shows an example of such an arrangement.
In the figure, the dotted line indicates the pressure area.

In order to lengthen the collision pressure application time, it is preferable that the ejectors are arranged in two or more rows in the feed direction of the transfer sheet and the substrate to be transferred. Further, the collision pressures do not necessarily have to be all uniform within the collision area.
FIG. 11 shows a setting example of a mountain-shaped pressure distribution in which the central portion in the width direction orthogonal to the transport direction of the transfer sheet has the maximum collision pressure, and the collision pressure decreases toward both ends in the width direction. This setting assists the pressure welding to proceed in a stepwise manner from a place where the pressure is high (the center part in the figure) to a place where the pressure is low (the both sides in the figure). However, in the case of the pressure distribution as shown in FIG. 11, the impact pressure on the substrate to be transferred is such that the transfer to the desired uneven surface can be completely performed, the transfer sheet is distorted due to excessive pressure, and the transfer Adjust so that it is all within the appropriate pressure range that does not cause deformation or breakage of the material. In the method of transferring to an uneven surface using a rubber transfer roller, if the diameter of the center portion of the transfer roller is increased, the center portion can be strengthened in terms of pressure, but the circumferential length differs between the center portion and both end portions. As a result, pressure is applied in contact and transfer of the transfer sheet cannot be made uniform.

The collision pressure is adjusted by controlling the speed of solid particles colliding from the ejector with the transfer sheet, the number of solid particles colliding per unit time, and the mass of one particle. Among these, in order to adjust the speed of the solid particles, for example, in the case of an ejector using an impeller, the rotation speed of the impeller,
Adjust with the diameter of the impeller. In the case of an ejector using an ejection nozzle, the opening and closing amount of a valve, the size of the inner diameter of a pipe for conveying solid particles connected to the valve, the fluid pressure (fluid By controlling the velocity of the ejected solid particles and the flow of the fluid, the adjustment is performed by controlling the single particles or the mixture of the fluid and the solid particles.

[Method of arranging ejector with respect to substrate to be transferred]
In the case of an ejector using an impeller, the ejection direction of the solid particles does not spread in principle in a direction parallel to the rotation axis of the impeller, but tends to spread in a direction perpendicular to the rotation axis. On the other hand, in the case of the blowing nozzle, the spread of the solid particles to be blown out is smaller than that in the case of the blower using the impeller, and even if it spreads, it is usually uniform and isotropic in all directions. The arrangement of the ejectors may be determined in consideration of such characteristics of the ejectors. However, when the size of the desired collision area cannot be achieved with one ejector, a plurality of ejectors may be used.

As described above, when a plurality of ejectors are arranged on the transfer surface of the substrate to be transferred, each ejector is parallel to the substrate to be transferred, and the ejection direction of each ejector is The basic arrangement is such that it is in the normal direction of the substrate. This is because such a parallel arrangement allows the solid particles to collide perpendicularly to the envelope surface of the surface to be transferred of the substrate to be transferred, and basically allows the collision pressure to be used most effectively. Therefore, for example, as shown in FIG.
If the envelope surface (the cross-sectional shape perpendicular to the transport direction) of the transfer-receiving surface is a cylindrical convex curved surface having a circular shape, the plurality of ejectors 32
And the enveloping direction of the ejector close to the individual collision surface (tangential plane of the convex curved surface) that each ejector mainly plays, so that the solid particles collide with each other. It is good to arrange in the normal direction of the surface. In this manner, the ejector may be arranged so that the ejecting direction of the ejector collides with the solid particles as perpendicularly as possible according to the uneven shape of the target substrate to be transferred. However, the direction of the ejector need not necessarily be perpendicular to the side surface of the support sheet. Further, a large number of ejectors may be provided, and some ejectors may be stopped depending on the substrate to be transferred.

[One Form of Continuous Transfer Using Chamber] When solid particles are actually used for pressing the transfer sheet S, it is necessary to circulate and reuse the solid particles without scattering them into the surrounding atmosphere. preferable. Then, next, as one form of the curved surface transfer method of the present invention, a curved surface transfer device which can be suitably used when continuous transfer is performed while preventing scattering of solid particles and circulating reuse by using a chamber. The configuration will be described with reference to FIGS.

The apparatus shown in FIGS. 13 and 14 uses a long transfer sheet S, and has a flat base material B having an uneven surface.
And a device for sequentially and successively transferring decorative layers and the like. The apparatus shown in FIG.
The sheet supply device 20 for supplying the transfer sheet S and winding the support sheet 1, and the solid particles P are ejected from the ejector 32 in the chamber 33 to collide with the support sheet 1 side of the transfer sheet S. Substrate applying device for applying an impact pressure sequentially to the transfer sheet S and pressing the transfer sheet S against the substrate to be transferred B, and further applying an adhesive to the substrate to be transferred B by a sponge roller R 50 is provided upstream of the chamber. The ejector 32 uses, for example, the above-described impeller.

The chamber 33 contains the transfer sheet S and the transfer base material B exposed to the collision pressure except for the vicinity of the entrance 30a and the outlet 30b of the transfer sheet S and the transfer base material B,
2, at least the opening is covered from the outside to prevent the solid particles P from leaking into the external working atmosphere. Also,
The chamber 33 includes an extension 30 extending below the base material transporting device 10 from the outlet 30b of the base material B to be transferred toward the downstream side.
1 which is a cross section taken along line XX in FIG.
As shown in FIG. 4, the width is somewhat larger than the width of the driving rotary roller 10b constituting the base material transport device 10. As shown in FIG. 13 (A), the bottom surface of the extension 30c is inclined so that the outlet 30b side is at a low position, and the connecting portion between the chamber 33 main body and the extension 30c has a shield 30d. And the outlet 3 of the chamber 33
The opening area on the 0b side is limited, and a return flow path 30e for the solid particles P is formed between the lower surface of the shield 30d and the bottom surface of the extension 30c. With this configuration, it is easy to maintain the inside of the chamber 33 preferably at a lower pressure (negative pressure) than the outside.

The substrate transport device 10 in this example comprises a transport driving rotary roller 10b. In addition, the base material conveying means 10
Transports at least the substrate to be transferred B to a position facing the ejector 32. In the apparatus shown in the figure, the substrate to be transferred B is further transported via the peeling roller 60. The transfer sheet supply device 20 includes a transfer sheet feeding device 21, a transfer sheet support device 22, a support sheet take-up device 23, and other upstream guide rollers 24, and a support sheet positioned immediately before the support sheet take-up device 23. It is composed of an inclination guide roller 23a and the like.

As shown in the drawing, the rotating shaft 23b of the support sheet winding device 23 winds the support sheet 1 so that one side edge of the support sheet 1 gradually becomes higher than the other side edge at the time of winding. In order to enable the transfer, the transfer base material B is arranged to be inclined above the exit side of the conveyance path. And between the rotation axis 23b of the support sheet winding device 23 and the outlet 30b of the chamber 33,
Peeling roller 60 and guide roller 2 for tilting the support sheet
3a are disposed, and the support sheet 1 is
By the rotation of 3b, the peeling roller 60 and the guide roller 23a for tilting the support sheet serve as a guide, and are gradually inclined obliquely upward with respect to the transfer surface of the base material B to be transferred. It is wound up.

When the support sheet 1 is inclined and taken up, the angle between the support sheet plane and the transfer surface of the substrate B to be transferred is usually 30 degrees immediately before being taken up by the support sheet take-up device 23. ° to 180 °. In the illustrated example, only one inclination guide roller 23a is provided.
A plurality of the support sheets 1 may be provided, and the inclination angle of the support sheet 1 may be sequentially increased stepwise. Further, in this example, the peeling roller 60 and the guide roller 23 for tilting the support sheet are used.
In a, only the left and right end portions have a large-diameter portion, and only the large-diameter portion comes into contact with the support sheet 1, thereby facilitating the drop of the solid particles P described later.

The collision pressure applying unit 30 stores a hopper 31 for storing and supplying the solid particles to the ejector 32, an ejector 32, a chamber 33, a drain pipe 34 as a return path to the hopper 31 for the solid particles P after collision, A separation device 35 for separating the solid particles P from a gas, a vacuum pump 36 for sucking and exhausting a carrier gas of the collected solid particles P, and the like are provided. The substrate coating device 50 is a device including the above-described sponge roller R as a coating unit that directly contacts the transfer-receiving substrate B.

The transfer sheet supporting device 22 is used to
And an endless belt or the like that rotates in accordance with the transfer of the transfer sheet S while sandwiching both ends of the transfer sheet S wider than the width of the transfer sheet S.
0a to the vicinity of the outlet 30b, the holding surface is attached at a position slightly above the upper surface of the substrate B to be transferred.

The transfer device further includes a sheet heating device 40 for heating the transfer sheet S, and a sheet heating device 4 for heating the substrate B to be transferred.
1 on the upstream side outside the chamber and on the downstream side of the substrate coating apparatus 50,
A cooling device 70 for cooling by air cooling is provided downstream of the chamber 33 and upstream of the peeling roller 60, and further provided with a suction / exhaust device 90 for promoting preliminary close contact between the transfer sheet S and the base material B to be transferred. .

First, in the apparatus shown in the figure, a plate-shaped substrate to be transferred B is transported one by one by a substrate transporting device 10 comprising a row of transporting rotary rollers 10b, and a substrate using a sponge roller R is transported. The coating device 50 applies the adhesive to the entire surface or only the desired uneven portions and the like. If there is a solvent component in the adhesive, the substrate to be transferred B and the adhesive are heated by the next substrate heating device 41, and the evaporated components are evaporated and dried. The substrate coating device 50 and the substrate heating device 41
May be connected to each other, and the undercoating or the sealer coating before the undercoating may be continuously performed simultaneously with the transfer before the adhesive is applied. After being transferred by the heating device 41, the transfer-receiving substrate B is transported and supplied into the chamber 33 of the collision pressure applying unit 30.

The transfer sheet S is transferred to the transfer sheet sending device 2
1. Tension is applied by a sheet supply device 20 including a transfer sheet support device 22, a support sheet take-up device 23, and the like. It enters the chamber 33 of the pressure applying unit 30. When the adhesive is also applied to the transfer sheet S at the time of transfer, while the transfer sheet S is supplied from the sheet feeding device 21 to the collision pressure applying unit 30,
If the adhesive is applied by an adhesive coating device (not shown) and further drying with a solvent is required, after drying the drying device (not shown),
It is supplied to the collision pressure applying unit.

When the transfer sheet S enters the chamber 33, as shown in FIG. 13 (B), both ends in the width direction are sandwiched by the sheet supporting device 22 and the transfer substrate S is conveyed on the transfer layer side surface. A space is slightly opened above the base material B to be transferred so as to face the side B (in a state where nothing is performed without applying an impact pressure or the like), and the transfer base material B is parallel to the transferred base material B or the like. It is transported at a speed, and is conveyed while maintaining a gap between the two until it receives the collision pressure and comes into contact with the transfer-receiving substrate B.

In this case, since the envelope surface of the transfer base material B is substantially flat, the complete contact of the transfer sheet S to the transfer base material B due to the collision pressure in the gap by the sheet support device 22 is not sufficient in the width direction. In the central part, the processing is performed earlier in time in the vicinity of both ends in the width direction. This is one of the measures for preventing air from leaving close contact between the base material B and the transfer sheet S (especially near the center). When transferring the transfer sheet S in the vicinity of the base material B at a constant speed, whether the transfer sheet S is slightly separated from the base material B or transferred as a contact state is determined by the surface of the base material B. The selection is made by appropriately considering the shape of the irregularities, the preheating temperature of the transfer-receiving substrate B, the thermal deformability of the transfer sheet S, the collision pressure of the solid particles P, the activation temperature of the adhesive, and the like.

The transfer sheet S is held by the sheet heating device 40 using heater heating, infrared heating, dielectric heating, induction heating, hot air heating, etc. before being nipped and conveyed by the sheet support device 22 and receiving the application of collision pressure. When heated, it is softened and easily stretched when a collision pressure is applied. Since the sheet heating device 40 is provided in the chamber 33 in the same drawing, it is better to reduce the air volume in the case of hot air heating. This is because air is introduced into the chamber 33, which hinders maintenance of a negative pressure in the chamber 33 and agitates the solid particles P as described later. The substrate heating device 41
The transfer sheet S is also indirectly heated by the transfer base material B which is heated by the above and supplied to the collision pressure applying unit. Heating by the sheet heating device can be omitted when preheating of the transfer sheet is unnecessary.

On the other hand, the solid particles P are supplied from the hopper 31 to the jetting device 32 in the chamber 33, where they are accelerated by the impeller as shown in FIGS. Spout toward. And
The transfer sheet S is exposed to the collision of the solid particles P ejected from the ejector 32. The amount of change per unit time of the momentum of the solid particles P at the time of collision is the collision pressure that presses the transfer sheet S against the transfer substrate B. Here, since the envelope surface of the transfer base material B is substantially flat, the solid particles P are mainly made to collide with the support sheet 1 side of the transfer sheet S substantially vertically, and the transfer base material B and the transfer sheet The entire width in which S is transported is defined as a collision area. Then, as the transfer base material B and the transfer sheet S are transported, the entire region in the longitudinal direction is sequentially exposed to the collision pressure.

Then, the transfer sheet S is pressed against the substrate B to be transferred by the solid particle collision pressure, and the transfer sheet S is also extended and deformed into the concave portion of the uneven surface of the substrate B to be transferred.
The transfer layer 2 is formed following the uneven surface shape of the transfer substrate B, and the transfer layer 2 adheres to the transfer substrate B by the activated adhesive. The transfer-receiving base material B to which the transfer sheet S is in close contact is cooled by cooling or the like before the collision pressure is released and before the transfer sheet S comes out of the chamber 33.

On the other hand, most of the solid particles P that have been subjected to the collision with the transfer sheet S bypass the side surfaces of the sheet support device 22 and collect in the lower part of the chamber 33, and from there the drain pipe 34 It is sucked and collected in the original hopper 31. The air in the chamber 33 for collecting and transporting the solid particles P is also sucked together with the solid particles P by the drain tube 34 and is transported to the airflow above the hopper 31 and the separation device 35 for the solid particles P. In the separation device 35, as shown in the drawing, the solid particles P that have been conveyed by an air current are discharged horizontally into the device cavity,
The solid particles P having a high density with respect to the gas fall downward by their own weight, and the gas flows horizontally as it is to form a filter 35a.
The remaining solid particles P which are going to move together with the airflow are filtered and discharged out of the system by the vacuum pump 36. In this way, the solid particles P are prevented from flowing out to the surroundings together with air from the entrance / exit opening of the chamber 33 through which the transfer sheet S and the transfer-receiving substrate B enter / exit.

Further, the solid particles P are prevented from flowing out of the chamber 33, and the solid particles P are transferred from the chamber 33 to the hopper 3.
In order to prevent backflow to 1, the inside of the chamber 33 is preferably set to a lower pressure than the outside. The pressure of the chamber 33 is adjusted by adjusting the exhaust amount of the vacuum pump 36 and further connecting an exhaust fan (not shown) to the chamber 33 as appropriate.
3 and the amount of gas entering the chamber 33 together with the solid particles P from the ejector 32 (especially in the case of an ejector such as an ejection nozzle using gas as a solid particle accelerating fluid), and a blower (not shown). Is properly connected to the chamber 33 to adjust the balance with the amount of gas to be introduced into the chamber 33 (particularly, in the case of an ejector using an impeller).

The transfer-receiving substrate B and the transfer sheet S which are in close contact with each other are preferably forcibly cooled by blowing cool air in a cooling device 70 located downstream of the chamber 33. Thereafter, the support sheet 1 of the transfer sheet S is wound by the rotating shaft 23b of the support sheet winding device 23. As described above, the rotation shaft 23b of the transfer base material B is wound so that one side edge side of the support sheet 1 can be gradually positioned higher than the other side edge side during winding. It is arranged obliquely above the exit of the transport path. Therefore, the upper surface of the support sheet 1 gradually becomes inclined from the horizontal state as it progresses to the downstream side, and the solid particles P remaining on the support sheet 1 (particularly, the recesses formed by the collision pressure) Are likely to be gradually discharged laterally (to the right in FIG. 14) and fall almost completely downward when reaching the support sheet winding device 23. The solid particles P that have fallen from the support sheet 1 fall into the extension 30c of the chamber 33 as shown in FIG. The solid particles P collected and dropped in the chamber 33
And used for reuse.

The timing at which the support sheet 1 is peeled off is such that the support sheet 1 is cooled so as not to be cut or plastically deformed by stress at the time of peeling after the collision pressure is released, and the adhesive layer is cooled or hardened. This may be performed after the transfer sheet is solidified and the transfer sheet is fixed to the base material to be transferred, and the peeling roller 60 is disposed at such a position. Further, as in the example shown in FIG. 13, the support sheet 1 is gradually inclined obliquely upward with respect to the transfer surface of the substrate to be transferred such that the side edge on the near side is positioned higher than the other side edge. In the case of being wound up, a member (not shown) that holds down only the side edge on the front side instead of holding both side edges of the support sheet 1 as large diameter portions at both ends of the separation roller 60 is peeled. The intended purpose can be achieved even if the roller 60 is disposed in place of the roller 60. After the support sheet 1 is peeled off, a decorative material D is obtained in which a decorative layer or the like as the transfer layer 2 of the transfer sheet S is transferred and formed on the entire uneven surface of the base material B to be transferred.

[0092] When a blowing nozzle using a liquid as a solid particle accelerating fluid is used as an ejector, a dryer is provided separately above or downstream of the cooling device, or also as the cooling device itself, for example. The liquid is dried or blown off by blowing air at room temperature or warm air to remove the liquid. When using an ionizing radiation-curable resin for the adhesive or the like, the resin is cured by providing an ionizing radiation irradiation device such as a mercury lamp (ultraviolet light source) between the ejector and the peeling roller.

[Other Embodiments] FIG. 15 is a perspective view showing another embodiment of the curved surface transfer device according to the present invention. However, in the illustrated example, the configuration of the chamber 33 and the drain tube 34 which is a circulation system of the solid particles shown in FIG. 13 is omitted. In this example, the substrate transfer device 10 includes an endless belt conveyor 100 at least in the chamber 33.
On the downstream side of the chamber 33, the driving rotary roll 1
0b. The left and right endless belts 1 are provided in a region where the solid particles are ejected by the solid particle ejecting means in the chamber 33, that is, in a range including at least an area where the solid particles P ejected from the ejector 32 collide with the transfer sheet S.
Numerals 01 and 102 are provided at intervals slightly wider than the width of the transferred base material B so as to be in contact with the base material transfer surface of the belt conveyor 100 and rotate synchronously.

Although not shown, the sheet feeding device 20
Sheet feeding device 21, support sheet take-up device 23, and guide roller 2 for tilting support sheet
3a is arranged similarly to the case of the device shown in FIG. However, in this example, the sheet support device 22 is not disposed inside the chamber 33, and the peeling roller 60 provided downstream of the outlet 30b of the chamber 33 is not disposed.

In this apparatus, the substrate B to be transferred is conveyed in the same manner as the apparatus shown in FIGS.
And the transfer sheet S is also transferred to the transfer sheet sending device 2.
1 and is passed through the upstream guide roller 24 and the guide roller 23a for tilting the support sheet, and is taken up by the support sheet take-up device 23. However, both side edge portions of the transfer sheet S are conveyed while being sandwiched between the conveying surface of the belt conveyor 100 and the left and right endless belts 101 and 102 at least below the solid particle ejector 32. . For this reason, as shown in the drawing, while the transfer sheet S is in the ejection area of the solid particles, the transfer sheet S
Is maintained below the transfer surface of the base material B to be transferred, so that the solid particles P are prevented from wrapping around the back surface of the transfer sheet S. Thereby, the transfer-receiving substrate B
It is possible to reliably prevent the solid particles P from entering between the transfer sheet S and the transfer sheet S and causing transfer failure. Further, since both side edges of the transfer sheet S are firmly sandwiched between the left and right endless belts 101 and 102 and the belt conveyor 100, it is not necessary to separately provide a peeling roll or it is unnecessary. It is possible to reliably prevent the separation from going back to the collision pressure applying section. Further, solid particles are clogged between the peeling roll and the transfer-receiving substrate B, and the transfer sheet S
The transfer layer 2 can be prevented from being scratched or torn. In the case of this apparatus, as in the case of the apparatus shown in FIGS.
It is also possible to provide it near 0b.

[Method of heating adhesive or the like when using chamber]
As described above, as an embodiment of the present invention, an example in which the solid particles P collide in the chamber 33 has been described.
A heating method for activating the adhesive or improving the transfer sheet stretchability during use will be further described. The heating of the transfer sheet S is performed in the chamber 33 as shown in FIG. 33 may be performed both inside and outside. The heating may be performed from any of the back side, the front side, and the front and back sides of the transfer sheet S.

In the heating means during the application of the collision pressure, when a heated solid particle or a fluid for accelerating solid particles is used, the heated fluid can also be used. Alternatively, the heat may be provided by providing a heat source dispersed in the gap between the ejectors 32. Of course, the heating during and before the application of the collision pressure can be used together, or the heating during the application of the collision pressure alone may be performed.

If the adhesive applied to the substrate B to be transferred or a sealer coating is further applied to the adhesive and the solvent is heated and dried by the substrate heating device 41 or the like, the substrate B Is heated, and the transfer sheet S can also be heated to some extent indirectly from the heated transfer-receiving substrate B. Therefore,
Even when the transfer sheet S needs to be heated, if the indirect heating from the substrate to be transferred B or the heating with the solid particles P or the solid particle accelerating fluid is sufficient, the sheet heating device dedicated to the transfer sheet is omitted. You can also.

The transfer substrate B may be heated before the collision pressure is applied, during the application of the collision pressure, or before and during the application of the collision pressure. By heating the transfer-receiving substrate B,
When the transfer sheet S is heated to improve the stretchability, it is possible to prevent the temperature of the heated transfer sheet from lowering. Also,
The transfer sheet can be heated from the side of the base material B to be transferred. The substrate to be transferred B may be heated outside or inside the chamber 33, or outside and inside. External and internal heating can be accomplished using long transport distances, even when sufficient preheating is required. If the internal volume of the chamber itself becomes large in order to provide a long substrate heating device inside the chamber 33, part or all of the substrate heating device is provided outside the chamber to reduce the internal volume of the chamber. This is because it is more advantageous in handling in consideration of scattering and recovery of solid particles.

The advantage of heating inside the chamber is that heating can be performed immediately before the application of the collision pressure or even during the application of the collision pressure. For example, when trying to preheat. In addition, in order to dry the adhesive and the coating by the base material coating device arranged on the upstream side, in the case of the base material heating device having a role of evaporating the solvent component and the moisture, it is preferable to arrange the inside of the chamber. Absent. A means for exhausting the evaporated solvent or moisture filled in the chamber is required, and in the case of a solvent, it is necessary to consider explosion-proof measures. Even if the substrate heating device for such a purpose is arranged outside the chamber or inside the chamber, the substrate heating device for evaporation (drying furnace) is externally provided.
Are preferably arranged separately. Of course, if the undercoating is performed on a separate line, it is not necessary to use the substrate heating device as a drying device.

As a heating means for the substrate B to be transferred, induction heating and dielectric heating can be performed from the inside of the substrate. On the other hand, heater heating, infrared heating, and hot air heating are effective when heating from the uneven surface side. is there. Further, the substrate to be transferred B may be heated from the back side. The transfer base material B is
If the substrate is heated to just before or during the application of the collision pressure after being transported, the heating from the back side of the base material is also preferable in view of the apparatus space. As for the heating during the application of the collision pressure, in addition to the heating on the upstream side of the collision pressure application unit, a heat source may be provided dispersedly in the gap between the ejectors (heating through the transfer sheet).

[Forced Cooling of Adhesive] When the adhesive is of the heat-sealing type, if the adhesive is forcibly cooled after the transfer sheet S is in close contact with the base material B to be transferred, the adhesive will follow the inside of the concave portion and form. The transfer sheet S is promoted to be fixed, preventing the transfer sheet S from returning to the original shape after the pressure is released when the transfer sheet S has a restoring force. Since peeling and removal can be performed more quickly, transfer omission can be prevented and production speed can be improved.

For this purpose, during the application of the collision pressure, the cooling solid particles are used without releasing the collision pressure, or when using the solid particle acceleration fluid, the cooling fluid is used. It is preferable to cool the adhesive layer using another cooling means. If the heat capacity of the transferred substrate is large, in addition to the cooling solid particles and the cooling fluid, spraying a low-temperature fluid,
By cooling the rollers and belt conveyor for transferring the base material,
The substrate to be transferred can be cooled from the back surface. Alternatively, after the above cooling in the chamber, cooling may be performed by blowing cold air from the front or back, or the like, outside the chamber after cooling inside the chamber, or without cooling inside the chamber, only outside the chamber.

[Air Vent] If the adhesive to be the transfer layer 2 or the adhesive layer on the substrate B to be transferred is heated before the collision pressure is applied, if the adhesive is not activated, or if it is activated, If the time process before the transfer can be used, non-adhesive contact between the transfer base material B and the transfer sheet S can be performed. It is preferable to perform “air bleeding” by forcibly removing the air in the gap between the substrate and the transfer-receiving substrate B. By removing air, the air between the transfer sheet S and the base material B to be transferred can be prevented from remaining "at the time of transfer", and further, the transfer omission caused by the air bite can be prevented. The air bleeding is performed by, for example, the suction / exhaust nozzle 9
1 and a suction and exhaust device 90 including a vacuum pump 92 and the like. The suction / exhaust nozzles 91 are provided on the transfer layer 2 side of the transfer sheet S and on both sides adjacent to both sides along the transport direction of the transferred base material B (see FIG. 13B).
Transfer sheet S and transfer-receiving substrate B
The air in between may be sucked and exhausted by the vacuum pump 92.
The outer periphery of the opening of the suction / exhaust nozzle 91 is surrounded by, for example, a brush, and if the tip of the brush is brought into contact with the base material to be transferred B and the transfer sheet S, air can be evacuated without any trouble. Also,
It is preferable to perform the air release until the collision pressure is applied. The timing of the air release and the preheating of the transfer sheet S may be started either first depending on the speed at which the transfer sheet S is preheated and softened, or the degree of softening, or both may be started simultaneously. Good. The air bleeding is effective when the transfer surface of the transfer substrate B has an uneven surface such as a rock surface tone or a stucco tone. The suction and exhaust device 90 can be arranged in the device shown in FIG. In that case, belt conveyor 1
As the material of 00, a material having air permeability is used.

[Others] While the method and apparatus for transferring to a curved surface according to the present invention have been described above, the present invention is not limited to the above description. For example, in the description of the transfer method to the uneven surface by the apparatus in FIGS. 13 and 15, the pressing of the transfer sheet S to the transfer base material B is performed using a long strip-shaped transfer sheet and a single sheet transfer base material. In this embodiment, the solid ejector 32 continuously applies the solid particle collision pressure while the two are integrally conveyed and moved. However, the transfer sheet S is pressed against the transfer base material B only at that time. Alternatively, the transfer-receiving base material B may be stopped, and the transfer may be performed intermittently for each base material (for example, the ejector is moved with respect to these).

In addition, the ejection direction of the solid particles P from the ejector 32 and the positional relationship between the transfer sheet S and the substrate to be transferred B are both placed on a horizontal plane, and the solid particles are placed vertically downward from directly above. It is not limited to the positional relationship of spouting. The transfer sheet may be placed or transported on a slope other than the horizontal plane. Of course, the solid particles may be ejected at an angle to the surface of the support sheet 1 of the transfer sheet S. When the chamber 33 is filled with an inert gas such as nitrogen and an ionizing radiation-curable resin (before curing) is used for the base coat layer of the transfer layer, oxygen, water vapor and the like in the air are removed. Inhibiting the curing of the resin may be prevented.

[Cosmetic Materials] The cosmetic materials obtained by the present invention include exterior materials such as outer walls, fences, roofs, gates, gable plates, architectural interior materials such as walls and ceilings, window frames, doors, handrails, sills, and Kamoi. Such as fittings,
It can be used in various fields such as a surface material of furniture such as a chest, a cabinet of light electric / OA equipment, or a vehicle interior material such as an automobile.

The surface of the decorative material after the transfer may be further coated with a transparent protective layer. As such a transparent protective layer, one or two 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, an ultraviolet absorber such as benzotriazole, ultrafine cerium oxide,
A paint to which a light stabilizer such as a hindered amine radical scavenger, a coloring pigment, an extender pigment, a lubricant and the like are added is used. Spray coating, flow coating, etc. are used for coating. The thickness of the transparent protective layer is about 1 to 100 μm.

[0109]

The present invention will be further described with reference to the following examples. First, FIG. 1 shows a transfer substrate B having three-dimensional surface irregularities.
As shown in the plan view of FIG. 6A and the perspective view of the main part of FIG.
mm-shaped grooved concave portion 401, and a brick-patterned flat convex portion 402, and a pear-finished tone having a depth of 0.1 to 1.0 mm distributed on the flat convex portion as fine irregularities. A 12-mm-thick calcium silicate plate having three-dimensional surface irregularities in which large irregularities and fine irregularities were superimposed, having fine irregularities 403 was prepared. Then, undercoating and undercoating were performed on the uneven surface with another apparatus offline.

The transfer sheet S was prepared by gravure-printing a brick-like pattern having joints as a decorative layer serving as a transfer layer on one surface of a polypropylene-based thermoplastic elastomer film having a thickness of 100 μm on a support sheet. did. As the binder resin of the picture ink, a mixture of an acrylic resin and a vinyl chloride-vinyl acetate copolymer in a ratio of 8: 2 (weight ratio) is used. As the coloring pigment, red-bodied pattern, isoindolinone, carbon black, Titanium white was used.

Next, in the apparatus shown in FIG. 13, an ejector 32 using an impeller as shown in FIGS. 4 to 7 is used as the ejector, and the transfer-receiving substrate B is placed with its uneven surface facing upward. The substrate is transported by being placed on a substrate transporting device 10 composed of a row of transporting rollers 10b, and a solvent-dilution type heat-melting adhesive made of an acrylic urethane resin is applied by a substrate coating device 50 using a sponge roller R. After the adhesive is melt-coated at 30 g / m ² , the adhesive and the substrate B to be transferred are heated by the substrate heating device 41, and the collision pressure applying unit 30 is heated.
Supplied. On the other hand, the transfer sheet S is also
0, the support sheet 1 was supplied to the collision pressure applying unit 30 with the support sheet 1 side up. The transfer base material B is applied to the collision pressure applying unit 30.
When the transfer sheet S entered the chamber 33, the transfer sheet S was brought close to the transfer-receiving substrate B. Then, both ends in the width direction of the transfer sheet S were sandwiched between the front and back sides by a pair of endless belt-shaped sheet support devices 22. In this state, the transfer sheet S was preheated, the adhesive was activated, and the substrate to be transferred was heated by the sheet heating device 40 using radiant heat from a heating wire heater from the support sheet 1 side of the transfer sheet S.

Next, the solid particles P have an average particle size of 0.4.
mm spherical zinc spheres are ejected from the ejector 32 to collide with the support sheet 1 side of the transfer sheet S, and the transfer sheet S
Was pressed against the substrate to be transferred B. The rotation speed of the impeller of the ejector 32 is 3600 [rpm], and the ejection speed of the solid particles P is 35.
[M / s]. Then, the transfer sheet S is extended into the joint recessed portion 401 and heat-sealed, and the cooling device 70 blows cool air immediately after the transfer sheet S comes out of the chamber 33,
After cooling the adhesive to a temperature lower than the bonding temperature, the support sheet 1 of the transfer sheet S is removed from the support sheet winding device 2.
3 was wound by the rotating shaft 23b. During the winding, the upper surface of the support sheet 1 was gradually inclined from the horizontal state, and was set at about 45 ° to the horizontal plane immediately before the support sheet winding device 23. This allows
The solid particles P on the support sheet 1 include those remaining in the recesses formed by the collision pressure.
Was discharged towards the side of the. The discharged and dropped solid particles P move to the lower part of the chamber 33 through a return flow path 30e formed in the extension 30c of the chamber 33, and are reused. The decorative material D obtained by peeling and removing the support sheet 1 had a pattern transferred thereon following the surface irregularities. Further, the transfer layer is entirely transferred to the inside of the bottom surface of the groove-shaped concave portion which is a large concave and convex portion of the base material B to be transferred and also to the inside of the fine concave and convex portion and the bottom surface, and transfer omission where the transfer layer is not partially transferred occurs. Did not.

[0113]

According to the present invention, a decorative material having a large three-dimensional uneven surface decorated can be easily obtained. Of course, two-dimensional irregularities such as window frames and sashes are also possible.
It can be easily obtained even if it has a wavy shape (envelope surface shape) as a whole, or a convex or concave curved shape like a tile. 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). Further, even when there is a finer uneven pattern (for example, a hairline, a satin finish, etc.) on the convex part of the large unevenness, the decoration can be transferred to the concave part of the fine unevenness. In addition, almost all of the solid particles used to form the transfer pressure are collected in the recirculation path without being discharged outside the machine, and are reused. No loss of solid particles, and continuous transfer is possible. Further, unlike the conventional rubber roller pressing method, there is no wear of parts such as the roller due to the concave and convex portions of the substrate to be transferred. As a result, a decorative material having an extremely excellent design property is obtained, which has never been obtained before.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram outlining a curved surface transfer method of the present invention.

FIG. 2 is a conceptual diagram outlining a curved transfer device of the present invention.

FIG. 3 is an enlarged sectional view of a sponge roller coating unit in FIG. 2;

FIG. 4 is a conceptual diagram (front view) illustrating one embodiment of an ejector using an impeller.

FIG. 5 is a perspective view of an impeller part of FIG. 4;

FIG. 6 is a conceptual diagram illustrating the inside of the impeller of FIG. 4;

FIG. 7 is an explanatory diagram for adjusting the ejection direction with an impeller.

8A and 8B are conceptual diagrams illustrating another embodiment of the ejector using the impeller, wherein FIG. 8A is a front view, and FIG. 8B is a side view.

FIG. 9 is a conceptual diagram illustrating one embodiment of an ejector using an ejection nozzle.

FIG. 10 is a plan view showing various arrangement forms of the ejector. (A)
Is an arrangement arranged in a staggered pattern, and (B) is an arrangement in which the central portion is located on the upstream side and shifted toward the downstream side toward both ends.

FIG. 11 is an explanatory diagram in which a collision direction is provided with a width distribution.

FIG. 12 is a side view showing one form of the ejector viewed from the flow direction.

13A and 13B are conceptual views of one embodiment of a curved surface transfer device of the present invention capable of performing the curved surface transfer method of the present invention, wherein FIG. The schematic device figure which looked at the ejection part of the device of A) from the substrate conveyance direction.

14 is a schematic device diagram illustrating a cross section taken along line XX in FIG.

FIG. 15 is a conceptual diagram of another embodiment of the curved surface transfer device of the present invention capable of performing the curved surface transfer method of the present invention.

FIGS. 16A and 16B are explanatory views showing an example of three-dimensional surface irregularities of a substrate to be transferred, wherein FIG. 16A is a plan view and FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 support sheet 2 transfer layer 3 ejector 10 substrate transport device (substrate transport device) 20 sheet supply device (sheet supply device) 21 sheet feeding device 22 sheet support device 23 support sheet take-up device 23a support sheet tilt Guide roller 24 upstream guide roller 24 30 collision pressure application unit (collision pressure application unit) 31 hopper 32 ejector (solid particle ejection unit) 33 chamber 34 drain pipe 35 separation device 36 vacuum pump 40 sheet heating device 41 substrate heating Apparatus 50 Substrate coating apparatus 60 Peeling roller (peeling means) 70 Cooling device 90 Suction and exhaust device (Suction and exhaust device) 91 Suction and exhaust nozzle 92 Vacuum pump 401 Groove-shaped concave portion 402 Flat convex portion 403 Fine unevenness 812, 812a impeller 813 813a Blade 814, 814a Side plate 815 Hollow portion 816 Direction controller 817 Opening 818 Sprayer 819, 819a Rotating shaft 820 Bearing 840 Jetting device using blowout nozzle 841 Induction chamber 842 Internal nozzle 843 Nozzle opening 844 Nozzle B Transfer base material D Cosmetic material P Solid particles R Sponge roller R1 Shaft core R2 Sponge S Transfer sheet

Claims (4)

[Claims] 1. A transfer sheet comprising a support sheet and a transfer layer, wherein the transfer layer side of the transfer sheet comprising a support sheet and a transfer layer is opposed to the uneven surface side of the transfer-receiving substrate carried in by the substrate transfer means. The transfer sheet is pressed against the uneven surface of the substrate to be transferred by using the collision pressure and the transfer layer is adhered to the substrate to be transferred, and then the support sheet of the transfer sheet is peeled off. A curved surface transfer method for transferring a transfer layer to a substrate to be transferred by removing the support sheet, such that the surface of the support sheet is gradually inclined obliquely upward with respect to the transfer surface of the substrate to be transferred. Characterized in that the solid particles on the support sheet can be removed to the side of the substrate to be transferred. 2. The transfer layer side of a transfer sheet comprising a support sheet and a transfer layer is opposed to the uneven surface side of a substrate to be transferred having an uneven surface, and solid particles are coated on the support sheet side of the transfer sheet. An apparatus for carrying out a method of causing a collision and pressing a transfer sheet against an uneven surface of a substrate to be transferred by using the collision pressure, wherein at least a solid particle ejecting means for ejecting solid particles; Substrate transfer means for transferring the base material to a position opposed to the solid particle ejection means; transfer sheet supply means for positioning a transfer sheet between the solid particle ejection means and the substrate to be transferred; And a support sheet take-up roll for winding the support sheet of the transfer sheet so that its surface is gradually inclined obliquely upward with respect to the transfer surface of the substrate to be transferred after bonding to the material. , The winding roll By the winding of the support sheet by solid particles on the support sheet is curved transfer apparatus characterized by being adapted be eliminated conveying path hand side of the transfer substrate. 3. The transfer sheet supply means further includes transfer sheet support means arranged along both sides of the transferred base material to be conveyed, and both sides of the supplied transfer sheet are provided with the transfer sheet. 3. The curved surface transfer device according to claim 2, wherein the curved surface transfer device is nipped and guided by a sheet supporting means. 4. The base material transporting means has a belt conveyor for transporting a substrate to be transferred, and the transfer sheet supporting means further has an endless belt which is in contact with the transport surface of the belt conveyor and rotates synchronously. 3. The transfer sheet according to claim 2, wherein both sides of the transfer sheet are pressed and clamped between a conveying surface of the belt conveyor and an endless belt in a solid particle ejection area of the solid particle ejection unit. Curved surface transfer device.