JPH1159082A - Method for transferring to uneven backing and transfer apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To respond to high speed production by improving production efficiency by removing solid particles left on a support sheet rationally, surely, and promptly in a method and apparatus for transferring to an uneven backing in which the solid particles collide with the support sheet side of a transfer sheet and the transfer sheet is pressed evenly on the uneven surface of the backing. SOLUTION: When solid particles P left on a support sheet 1 are removed simultaneously with or after the delamination of the sheet 1, the delamination direction or the advance direction after delamination of the sheet 1 is changed to cross the preceding advance direction (at right angles), and the sheet 1 is turned upside down so that the solid particles P are removed by being dropped from the transfer passage of a backing B for transfer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base material having an uneven surface, and more particularly to an uneven surface for transferring a pattern to the uneven surface of 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 a transfer device to a substrate.

[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.

However, in the conventional method as described above, for example, the technique disclosed in Japanese Patent Publication No. 61-5895 can deal only with a two-dimensional curved surface.
Although the technology proposed in JP-A-139097 can cope with a three-dimensional curved surface, it is basically assumed that a shallow embossed shape is good in order to follow surface irregularities by utilizing elastic deformation of a rotating heat roller by rubber. It cannot be applied 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.

Accordingly, the applicant of the present application has been able to reliably form a transfer pattern even on a large three-dimensional uneven surface, thereby obtaining excellent surface decorativeness, and a jig having a special shape for pressing transfer pressure. We are developing a method for transferring to an uneven substrate and a transfer device for it, which does not require replacement and does not require replacement due to wear of parts such as rubber rollers, and has already applied for a number of new proposals in patent applications. No. 8-159164).

[0007] The method of transferring to an uneven substrate according to the new proposal basically involves a means for following and pressing a transfer sheet comprising a support sheet and a transfer layer so as to follow the uneven surface of the substrate to be transferred. In this method, solid particles collide against the support sheet side of the transfer sheet, and the collision pressure is 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. Are made to collide with each other, and the collision pressure is used as a pressing force to make the transfer sheet follow the transfer sheet along the uneven surface of the transfer substrate, and after the transfer layer adheres to the transfer substrate, the transfer sheet support The transfer layer is transferred to the substrate to be transferred by peeling the sheet.

[0008]

In the above-mentioned method of transferring onto an uneven base material, the solid particles used for pressing the transfer sheet into contact with the uneven surface of the base material to be transferred are pressed from above the support sheet. The problem is how to remove it.

That is, (the support sheet of the transfer sheet)
As the solid particles to be collided with non-metallic inorganic particles such as glass beads and ceramic beads, metal particles such as iron and zinc, or resin beads such as fluororesin beads, which will be described later in detail, are used. The shape is spheroidal, polyhedral, scaly, amorphous, or the like in addition to the spherical shape, and the particle size is usually about 10 to 1000 μm.

In order to apply a collision pressure to the solid particles, for example, a solid particle ejection means using a rotating impeller or an ejection nozzle is used, and the solid particle ejection speed is 10 to 50 [m / S], and the projection density is 10 to 150.
[Kg / m ² ].

Then, after the solid particles as described above are made to collide with the support sheet in the above-described manner, usually,
In order to make effective use of resources and the like, solid particles on the support sheet are removed, collected, and recycled.

Here, as schematically shown in FIG. 21, the support sheet 1 and the transfer layer 2
The transfer layer S of the transfer sheet S is made to face the transfer sheet S, and the solid particles P are made to collide with the support sheet 1 side of the transfer sheet S so that the transfer sheet S follows the surface irregularities of the base material B to be transferred. When the support sheet 1 is pressed in contact with the base material 1, the support sheet 1 is stretched along the unevenness of the base material B to be transferred, and the unevenness (the concave portions 101, 102, 103,
..) Are formed, and the used solid particles P remain on the support sheet 1. In this case, the solid particles P are formed not only in the flat portion of the upper surface of the support sheet 1 but also in the concave portion 1.
01, 102,...

As a measure for removing the solid particles P on the support sheet 1 as described above, generally, as schematically shown in FIG. 22, one side of the support sheet 1 (even directly above the support sheet 1) is blown with an air blower. It is conceivable that air is blown onto the support sheet 1 to blow off the solid particles P on the support sheet 1 to remove the solid particles P. However, as shown in the drawing, a part of the solid particles P , 102, ... because it is in a state of being caught in there,
If you blow on the support sheet 1 with a blower,
The solid particles do not come out of the recesses 101, 102,... And may not be able to be removed.

In particular, when relatively heavy metal particles or the like capable of causing the transfer sheet to follow irregularities of the substrate to be transferred are used as the solid particles, the solid particles do not float unless the wind speed is considerably increased. In addition, it takes a long time to move and remove, and as a result, the production efficiency deteriorates, and it is not possible to cope with high-speed production. Also, when the wind speed is increased, turbulence occurs, solid particles scatter around,
And the like. Furthermore, when relatively light solid particles are used, the transfer sheet cannot sufficiently follow the unevenness of the substrate to be transferred, and the solid particles are further scattered to reduce the surrounding atmosphere. In addition to soiling, a problem such as insufficient collection occurs.

The present invention has been made in view of the above-mentioned problems, and has as its object to collide solid particles with a support sheet side of a transfer sheet, and to use the collision pressure to apply solid particles. In the transfer method and the transfer device to the uneven base material, in which the transfer sheet is pressed against the uneven surface of the transfer base material, the solid particles remaining on the support sheet are removed rationally, reliably and quickly. To be able to
The purpose is to improve the production efficiency to correspond to high-speed production.

[0016]

In order to achieve the above-mentioned object, the method of transferring to an uneven substrate according to the present invention is basically performed in the same manner as in the above-mentioned new proposal. As means for following and pressing the transfer sheet composed of the layers along the uneven surface of the substrate to be transferred, solid particles collide with the support sheet side of the transfer sheet and the collision pressure is 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. Are made to collide with each other, and the collision pressure is used as a pressing force to make the transfer sheet follow the transfer sheet along the uneven surface of the transfer substrate, and after the transfer layer adheres to the transfer substrate, the transfer sheet support By peeling off the sheet, the transfer layer is transferred to the substrate to be transferred.

Then, the solid particles remaining on the support sheet are removed in parallel with or after the separation of the support sheet. In this case, the direction in which the support sheet is separated or the solid particles after the separation are removed. While converting the traveling direction to a direction intersecting or orthogonal to the previous traveling direction, the front and back of the support sheet is reversed, and the solid particles flow down and to the side of the transfer path of the transfer-receiving substrate. It is made to fall and be removed.

In this case, in a preferred embodiment, a series of operations of peeling the support sheet, changing the direction, and reversing the front and back are performed by a guide roller whose axis is inclined with respect to the transfer path of the base material to be transferred. Or through the turn bar.

On the other hand, the transfer apparatus for transferring to an uneven substrate according to the present invention is for carrying out the above-described transfer method. A substrate transporting means for transporting the substrate to be transferred to a position opposed to the solid particle discharging means; and a transfer sheet positioned between the solid particle discharging means and the transferred substrate. A transfer sheet supplying means for causing the transfer layer to adhere to the substrate to be transferred, and then peeling the support sheet of the transfer sheet upward by pulling it upward or obliquely upward with respect to the substrate to be transferred; Or a support sheet processing means for converting the traveling direction after peeling to a direction intersecting or orthogonal to the previous traveling direction, turning the support sheet upside down and winding it up, To have.

In a preferred embodiment, the support sheet processing means includes a guide roller or a turn bar in which a guide surface portion in contact with the support sheet is formed of a material having elasticity and flexibility such as rubber.

In a preferred embodiment of the method and the apparatus for transferring to a concavo-convex substrate of the present invention having the above-described structure, the direction of peeling of the support sheet or the direction of travel after peeling is controlled by a guide roller or the like. The support sheet is converted, for example, in a direction crossing or orthogonal to the previous traveling direction, so that the surface thereof is gradually inclined obliquely upward with respect to the transfer surface (uneven surface) of the base material to be transferred. As shown schematically in FIG. 19, most of the solid particles P on the support sheet 1 are caused to flow down to one end in the width direction by the inclination of the support sheet 1, and The transfer sheet B is removed to the side of the transfer path and is removed from the support sheet 1.

Subsequently, as schematically shown in FIG.
By inverting the front and back of the support sheet 1, the recesses 101, 1 formed on the support sheet 1 and corresponding to the irregularities (401, 402, 403) of the substrate to be transferred.
02,... And the solid particles P remaining therein are all dropped and removed to the side of the transfer path of the transfer-receiving base material B, and the solid particles are almost completely removed from the support sheet 1. Is done. The solid particles removed from the support sheet are collected, for example, by a solid particle collection drain disposed on the side of the transfer path on the transfer-receiving base material, and provided for circulating reuse.

As described above, according to the method and the apparatus for transferring to an uneven base material of the present invention, a blower for removing solid particles is not required, and only a relatively inexpensive guide roller or the like is used. The solid particles can be rationally, reliably and rapidly removed from the support sheet without having to stop or slow down the support sheet for removing the solid particles. As a result, production efficiency is improved,
It can correspond to high-speed production.

[0024]

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)
1, 402, 403,...) Is preferably provided with an adhesive layer 4 by, for example, a sponge roller R (right side in FIG. 2). Next, the transfer layer 2 side of the transfer sheet S composed of 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. 1).
(A)), a number of solid particles P ejected from an ejector 3 (solid particle ejecting means) to be described later collide with the support sheet 1 side of the transfer sheet S, and the collision pressure is used as a transfer pressure. Then, the transfer sheet S is pressed against the base material 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 as to be gradually inclined obliquely upward with respect to the transfer surface of the transfer-receiving substrate B (FIG.
(C)), the solid particles P on the support sheet 1 were reliably removed to the side of the substrate to be transferred B, and the transfer layer 2 was transferred to the uneven surface of the substrate to be transferred B. The decorative plate D is obtained ((FIG. 1 (D)). The excluded solid particles P are recirculated and used again as the solid particles P to be ejected from the ejector 3 as described later.

Hereinafter, the present invention will be described in more detail. [Transferred substrate] First, as the transferred substrate B of the present invention,
A transfer surface having an uneven surface is used. The present invention achieves the intended purpose even if the unevenness is a three-dimensional unevenness. Conventional holding jigs that come into rotational contact
No. 5895) and a transfer roller made of rubber (see the above-mentioned Japanese Patent Application Laid-Open No. 5-139097) inherently have a direction due to the rotation axis thereof, so that applicable surface unevenness is limited. Is done. That is, the former is limited to two-dimensional irregularities having a curvature in only one axis direction, and the latter is capable of transferring to three-dimensional irregularities having a curvature in two axes even if the three-dimensional shape can be transferred in any direction. Cannot be applied homogeneously. For example, unless the longitudinal direction of the wood grain conduit pattern is parallel to the feed direction of the transfer sheet, it cannot be successfully transferred to the concave portion of the conduit. Moreover, in the latter case, the shape of the base material is practically limited to a flat plate shape, and otherwise, it is impossible unless a transfer roller having a special shape tailored to each base material shape is used.

However, in the present invention, as 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.

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 transfer substrate having an irregular surface having fine irregularities superimposed on large irregularities, or a transfer 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 irregularities and the fine irregularities are, for example, the irregularities 401, 402, and 404 of the transfer-receiving substrate B and the convex portions 4 as shown in FIG.
04, the fine irregularities 403 on the large pattern irregularities, the step is about 1 to 10 mm, the width of the concave is 1 to
About 10 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 The width of the concave portion and the width of the convex portion are about 5 mm.
It may be about 1 mm or more and less than about の of the width of the convex portion of the large uneven shape.

Specific examples of the uneven pattern of the decorative material, which is composed of a combination of large and small irregularities and fine irregularities and has three-dimensional surface irregularities, include joints and grooves as large irregularities. It has a two-dimensional array pattern of tiles, bricks, stones, etc., and has fine irregularities on the spray painted surface such as stucco, lysine etc. 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 may 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 agent 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.

Further, the support sheet may be provided with a release layer on the transfer layer side, if necessary, 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.

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 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 and the like 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 uneven shape of the substrate to be transferred is inconspicuous at the stage of the transfer step. 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. As the binder, 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 them is used. As the pigment of the colorant, inorganic pigments such as titanium white, carbon black, red iron oxide, graphite, and ultramarine blue, and organic pigments such as aniline black, quinacridone, isoindolinone, and phthalocyanine blue are used.

A release layer is provided between the support sheet or release layer and the decorative layer for the purpose of adjusting the releasability between the decorative layer and the surface of the decorative layer after transfer. This is the same as a conventionally known transfer sheet. 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.

As a means for easily removing air remaining between the transfer sheet and the substrate to be transferred at the time of transfer, a large number of small holes are formed in the transfer sheet as necessary to penetrate all layers of the transfer sheet. You may.

[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, and polyamide obtained by polycondensation 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 at the time of 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. Specifically, a radical polymerizable unsaturated bond or a cationic polymerizable A prepolymer (including a so-called oligomer) having a group and / or a composition which is appropriately mixed with a monomer and 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-mentioned prepolymer or monomer specifically has a radically polymerizable unsaturated group such as a (meth) acryloyl group or a (meth) acryloyloxy group, or a cationically polymerizable functional group such as an epoxy group in the molecule. Consisting of a compound having Further, a polyene / thiol prepolymer based on a combination of 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 for irradiating 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 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 substrate to be transferred 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 transfer surface which is the uneven surface of the transfer substrate. 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-sensitive 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, 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 easy-adhesion 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, as shown in FIG. 3, a roller having a structure in which a rigid shaft core R1 made of iron or the like is covered with a sponge R2 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] The solid particles P used for pressing of 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. Metal-inorganic particles, iron or iron alloys such as carbon steel and stainless steel, aluminum or aluminum alloys such as duralumin, metal particles such as metal beads such as titanium and zinc, or fluororesin 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.
When liquid water is used as the solid particle accelerating 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 1
It is about 000 μm.

The solid particles can also serve as a heating means and a cooling means. When heated solid particles are used, the activation of the adhesive by heating and the promotion of crosslinking and curing thereof, or the improvement of the stretchability by heating the transfer sheet can be performed together with the pressing of the transfer sheet. In this case, the transfer sheet and the substrate to be transferred may be heated to some extent by another heating method before the application of the collision pressure. Further, as the solid particles, 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 heat 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 by gravity, a method of accelerating magnetic particles by a magnetic field, and the like may be used other than the blowing nozzle and the impeller. Is also possible. In the case of an impeller, a solid particle ejecting unit using gravity and a magnetic field, the solid particles can be ejected toward the transfer sheet in a vacuum.

[Impeller] FIGS. 4 to 7 show 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 includes a plurality of blades 8.
13 is fixed on both sides by two side plates 814, and the center of rotation is a hollow portion 815 without the blade 813. Further, a direction controller 816 (see FIGS. 6 and 7) is provided inside the hollow portion 815. The direction controller 816 has an opening 817 having a part of the outer circumference opened in the circumferential direction, has a hollow cylindrical shape, has the same rotation axis as the rotation axis of the impeller 812, and rotates independently of the impeller 812. It is free to move. 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 spreader 818 rotates with the outer impeller 812. A rotating shaft 819 is fixed to the center of rotation of the side plate 814. The rotating shaft 819 is rotatably supported by a bearing 820, and is driven and rotated by a rotating power source (not shown) such as an electric motor. Rotates. Further, the rotating shaft 819 includes two side plates 81 having blades 813 therebetween.
It does not penetrate between the four 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 rotating shaft 819 is configured so as to be only outside the side plate 814 and not penetrate to the hollow portion 815. In addition, the rotating shaft 819 is thinner than the diameter of the hollow portion. 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. 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.

Depending on the shape of the impeller, the number of the impellers, the rotation speed, and the combination of the mass and supply speed and supply direction of the solid particles, the opening size and the direction of the direction controller, the ejection 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 814
a also regulates the jetting 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 with an ejection guide (not shown) for opening only a portion for ejecting and ejecting solid particles as necessary and covering the periphery of the other impeller. By providing, the ejection direction of the solid particles can be made uniform 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 blade 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 is a conceptual diagram showing 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.

Note 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 guide chamber and the nozzle may be appropriately selected from ceramic, 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, and the solid particles P are ejected together with the fluid F from the solid particle ejecting means (such as 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 a constant velocity collision, the collision pressure is higher than that of a 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 is 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 time for applying the collision pressure, 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 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 mode of the transfer method to the uneven substrate of the present invention, unevenness which can be preferably used when performing continuous transfer while preventing scattering of solid particles and circulating reuse using a chamber. One embodiment of the transfer apparatus 100 for transferring a base material will be described with reference to FIGS.

The transfer apparatus 100 shown in FIG. 13 uses a long transfer sheet S, and a flat base material B having an uneven surface.
And a device for sequentially and successively transferring decorative layers and the like. The apparatus 100 shown in FIG.
0, a sheet supply device 20 for supplying the transfer sheet S and winding the support sheet 1, and ejecting the solid particles P from the ejector 32 in the chamber 33, and the transfer sheet S on the support sheet 1 side And a collision pressure applying section 30 for sequentially applying a collision pressure to the transfer sheet S so as to press the transfer sheet S along the irregularities of the transfer base material B. Substrate coating device 5 for coating
0 is provided upstream of the chamber. The ejector 32 uses, for example, the above-described impeller.

Except for the vicinity of the entrance 30a and the exit 30b of the transfer sheet S and the substrate B, the transfer sheet S and the substrate B exposed to the collision pressure,
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 is provided with an outlet 3 of the base material B to be transferred, as can be clearly understood from FIG.
0b, and has an extension 30c (to be a drain 35 for collecting solid particles, which will be described later) that extends below the base material transporting device 10 and to one side (the right side in the drawing) from the downstream side to the downstream side. The width of the carrier belt 10 constituting the base material conveying device 10 is
a, It is somewhat wider than the width of the guide roller 10b. The bottom surface of the extension 30c is inclined so that the outlet 30b side is at a low position, and
A shield 30d is arranged at a connection portion between the main body and the extension 30c to limit an opening area on the outlet 30b side of the chamber 33, and between the lower surface of the shield 30d and the extension 30c, A return channel 30e is formed. With this configuration, it is easy to maintain the inside of the chamber 33 preferably at a lower pressure (negative pressure) than the outside.

In this example, the base material transporting device 10 comprises a drive belt wheel 10A, a driven belt wheel 10B, an endless annular carrier belt 10a stretched between them, guide rollers 10b, 10b,... It is a belt conveyor, and conveys the substrate to be transferred B horizontally from left to right in FIG. Note that the carrier belt 10a used here is sufficient if the transfer-receiving substrate B is placed thereon, so that a belt-shaped one having no ordinary flexible through-hole or the like can be used. For the sake of convenience when collecting the solid particles described above, the belt 10a
For example, a net-like material that transmits solid particles may be used.

The transfer sheet supply device 20 includes a transfer sheet unwinder 21, a transfer sheet support device 22, upstream guide rollers 24 and 25, a separation roller 60 and a support sheet winder 23, which will be described later. Body sheet processing mechanism 2
0A etc.

The collision pressure applying unit 30 includes a hopper 31 for storing and supplying the solid particles to the ejector 32, an ejector 32, a chamber 33, and a drain pipe 34 serving 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 the gas, a vacuum pump 36 for sucking and exhausting the carrier gas of the recovered solid particles P, and the like. The substrate coating device 50 includes:
This is an apparatus provided with the above-described sponge roller R as a coating means for directly contacting the base material B to be transferred.

As shown in FIGS. 14 and 15, the transfer sheet supporting device 22 holds the transfer sheet S while holding both ends of the transfer sheet S wider than the width of the base material B to be transferred, from both front and back sides. A pair of left and right endless tracks 22A, 22B, and 22C that rotate in accordance with the transfer,
22D, from the inlet 30a to the outlet 3 of the chamber 33.
In the vicinity of 0b, the holding surface is disposed at a position slightly above the upper surface of the substrate B to be transferred.

The transfer device 100 further includes a sheet heating device 40 for heating the transfer sheet S on the upstream side of the ejector 32 in the chamber 33, and a substrate heating device 41 for heating the base material B to be transferred on the upstream side of the chamber. On the downstream side of the substrate coating apparatus 50, and on the downstream side of the
A cooling device 70 for cooling by air cooling is provided on the upstream side, and a suction and exhaust device 90 for promoting preliminary close contact between the transfer sheet S and the substrate B to be transferred is also provided.

In the transfer device 100 of the present embodiment, the plate-shaped substrate to be transferred B is transported one by one by the substrate transport device 10 and bonded by the substrate coating device 50 using the sponge roller R. The agent is applied to the entire surface or only desired portions such as uneven portions. If the adhesive has a solvent,
Next, the substrate B and the adhesive are heated by the substrate heating device 41, and the evaporated components are evaporated and dried. Note that a plurality of the substrate coating devices 50 and the substrate heating devices 41 may be connected to each other, and the undercoating or the sealer coating before the undercoating may be 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 FIGS. 14 and 15, both ends in the width direction are conveyed on the surface on the transfer layer side while being sandwiched by the sheet support device 22. The transfer-receiving substrate B is conveyed with a slight space opened above the transfer-receiving substrate B so as to face the transfer-receiving substrate B (in a state where nothing is performed without applying an impact pressure or the like). Are transported at the same speed in parallel with the substrate, and are transported while maintaining a gap between them until they are brought into contact with the transfer-receiving substrate B under the impact pressure.

Here, since the envelope surface of the transfer base material B is substantially flat, the complete contact of the transfer sheet S with the transfer base material B due to the collision pressure in the above-mentioned gap by the sheet supporting device 22 does not occur 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, or the like, before being nipped and conveyed by the sheet supporting device 22 and receiving the impact 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 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 impact pressure, and the transfer sheet S is extended and deformed into the concave portion on the uneven surface of the substrate B, whereby the transfer sheet S is deformed.
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 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 system, 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 closely adhered transfer substrate B and the transfer sheet S are preferably forcibly cooled by blowing cool air in a cooling device 70 located downstream of the chamber 33. In addition,
When a blower nozzle using a liquid as a solid particle acceleration fluid is used as an ejector, a dryer is provided above or downstream of the cooling device, or together with the cooling device itself, and a dryer is provided. Blow air to dry or blow off the liquid. Also, when using an ionizing radiation-curable resin to cure the adhesive or the like, between the ejector and the peeling roller,
An ionizing radiation irradiation device such as a mercury lamp (ultraviolet light source) is provided and cured.

[Support Sheet Processing Mechanism (Characteristics of the Present Invention)] As described above, after the transfer sheet S is made to follow the transfer sheet S along the uneven surface of the base material B to be transferred using the solid particles, While the transfer sheet S is pressed against the uneven surface of the transfer-receiving substrate B, the chamber 3
3 to the peeling roller 60 arranged downstream of
The transfer sheet supply device 20 including the separation roller 60
1 by a support sheet processing mechanism 20A forming a part of FIG.
As shown in FIGS. 6 to 18, the support sheet 1 of the transfer sheet S is peeled off and wound up by the support sheet winder 23.

The support sheet processing mechanism 20A includes, in addition to the peeling roller 60 and the support sheet winder 23, an inclined guide roller 26 and a reverse guide roller 27 disposed therebetween. The peeling roller 60 has its shaft 6
0a is arranged so as to be orthogonal to the transfer direction of the transfer-receiving base material B, and only the both end portions have a large diameter so that only the large-diameter portion contacts the support sheet 1. On the substrate to be transferred B (on the support sheet 1)
Without pressing down the solid particles P of the
Fall).

The inclined guide roller 26 has a shaft 26
a is inclined by about 45 ° with respect to the transport direction of the transfer-receiving substrate B in plan view (FIG. 16), and is inclined by about 30 ° with respect to the horizontal plane in front view (FIG. 17). The (left end) is positioned diagonally above the left end of the peeling roller 60, and the other end (right end) is positioned at the same height position as the right end of the peeling roller 60 and in front of it. , Are arranged so as to cross the support sheet 1 diagonally.

On the other hand, the reversing guide roller 27 has a shaft portion 27a horizontally disposed outside and parallel to the right end of the substrate transfer device 10 in plan view (FIG. 16), and The guide roller 26 is disposed obliquely above the right end.

Each of the inclined guide roller 26 and the reverse guide roller 27 is formed of a rubber roller having a guide surface portion, which is in contact with the support sheet, made of a material having elasticity and flexibility such as rubber. In addition, the inclined guide roller 26 and the reverse guide roller 27 do not have a roller structure,
It may be a turn bar formed of a cylindrical pipe or the like, or may be constituted by a conical roller or the like, and the material thereof may not be a material having elasticity and flexibility such as rubber.

Further, the lower right side of the base material transporting apparatus 10, ie, the peeling roller 60 and the reversing guide roller 27,
A drain 135 for collecting solid particles, which is an extension 30c of the chamber 33, is disposed on the right side of the right side of the reversing guide roller 27, and on the right side, the winding machine 23 is The shaft portions 23a are arranged in parallel with the reversing guide roller 27 so as to be arranged in a plan view.

In the support sheet processing mechanism 20A, as can be clearly understood with reference to FIGS.
The peeling direction of the support sheet 1 and the traveling direction after the peeling are converted by the peeling roller 60 and the inclined guide roller 26 into a direction intersecting or orthogonal to the previous traveling direction, and the inclined guide roller 26 and The support sheet 1 is turned upside down by a reversing guide roller 27 and wound up by the winder 23.

Accordingly, in the above configuration, the peeling direction of the support sheet 1 and the traveling direction after the peeling are intersected or orthogonal to the previous traveling direction via the peeling roller 60 and the inclined guide roller 26. Since the support sheet 1 is changed in direction, the support sheet 1 is peeled off so that its surface is gradually inclined obliquely upward with respect to the transfer surface (uneven surface) of the base material 1 to be transferred, and is schematically illustrated in FIG. As shown, most of the solid particles P on the support sheet 1
Due to the inclination of the support sheet 1, the support sheet 1 is caused to flow down to the right end side in the width direction, and is removed by the solid particle collection drain 135 on the lower right side of the transfer path of the transfer-receiving base material B and removed from the support sheet 1. You. In this case, in order to prevent the solid particles from dropping onto the carrier belt 10a of the base material transporting device 10, a flow-down guide plate 140 may be disposed as shown by a virtual line in FIG. 17 as necessary. .

Subsequently, since the front and back of the support sheet 1 are inverted by the inclined guide roller 26 and the reverse guide roller 27, the support sheet 1 is formed on the support sheet 1 as schematically shown in FIG. Concave portions 101, 1 corresponding to the irregularities (401, 402, 403) of the substrate to be transferred.
02,... And the solid particles P remaining therein are all dropped and removed to the side of the transfer path of the transfer-receiving base material B, and the solid particles are almost completely removed from the support sheet 1. Is done. As described above, after the support sheet 1 is peeled off, the decorative material D on which the decorative layer or the like as the transfer layer 2 of the transfer sheet S is transferred and formed over the entire uneven surface of the base material B to be transferred.
(Product) is obtained.

As described above, in the present embodiment, the inclined guide roller 26 and the reversing guide roller 27 are arranged to change the direction of the support sheet 1 in the horizontal direction and invert the support sheet 1 so that the support sheet 1 Since a solid particle is removed, a blower for removing the solid particle is not required, a relatively inexpensive guide roller or the like is used, and the support sheet is stopped for removing the solid particle. The solid particles can be rationally, reliably and quickly removed from the support sheet without the need to reduce the speed of the solid particles. As a result, production efficiency is improved, and high-speed production can be handled.

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 the stress at the time of peeling after the collision pressure is released, and the adhesive layer is cooled or cured. 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, if the inclined guide roller 26 is arranged at the same height as the peeling roller 60 in parallel with the horizontal plane, the inclined guide roller 26 plays a role of the peeling roller 60, and the peeling roller 60 is It can be unnecessary.

Further, as described above, the angle formed by the transport direction of the support sheet 1 after the reversal guide roller 27 has been turned upside down and the transport direction of the support sheet 1 before the peeling roller 60 is 90 ° ( Orthogonal) is most preferable in terms of the efficiency of removing solid particles. However, the angle between them may be set to other than about 90 °. Normal. The angle between the two is 45 to 13
It is set in the range of 5 °.

[Others] The transfer method and apparatus of the present invention have been described above, but 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 transfer device of FIG.
The press-contact with a solid strip was continuously applied by a fixed ejector 32 while using a long strip-shaped transfer sheet and a single sheet of the transfer-receiving base material while conveying and moving them integrally. However, the pressing of the transfer sheet S to the transfer base material B may be intermittently performed for each base material by stopping the transfer sheet S and the transfer base material B only at that time. For example, the ejector is moved). Further, needless to say, the solid particles may be ejected at an angle to the surface of the support sheet 1 of the transfer sheet S.

Further, the inside of the chamber 33 is filled with an inert gas such as nitrogen so that the base coat layer of the transfer layer or the like (before curing) is formed.
When using ionizing radiation curable resin, oxygen in the air,
Water vapor or the like may be prevented from inhibiting the curing of the resin.

Further, two or more inclined guide rollers 26 and reverse guide rollers 27 may be provided as necessary. Further, even if the support sheet is tilted or inverted, if some solid particles remain on the support sheet, the inclined guide roller 26 and the inverted guide roller 27 are excited by vibrations such as ultrasonic waves. Further, separately from these rollers, an excited guide roller may be provided after the peeling roller. By doing so, the removal of the residual solid particles can be made more complete.

[Cosmetic Materials] Cosmetic materials obtained by the present invention include exterior materials such as outer walls, fences, roofs, gates, and gable plates, architectural interior materials such as wall surfaces 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.

A transparent protective layer may be further applied on the surface of the decorative material after the transfer. 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.

[0125]

The present invention will be further described with reference to the following examples. First, FIG. 2 shows a transfer substrate B having three-dimensional surface irregularities.
2.5 mm depth as large irregularities as shown in 1,
A matte having a groove-like concave portion 401 of an joint having an opening width of 7 mm and a flat convex portion 404 of a brickwork pattern, and having a depth of 0.1 to 1.0 mm 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 in a tone pattern was prepared. Then, an undercoating and undercoating of a urethane resin were performed on the irregular surface by another apparatus offline.

The transfer sheet S is obtained by gravure printing a brick-like pattern having joints as a decorative layer to be a transfer layer on one side of a polypropylene-based thermoplastic elastomer film having a thickness of 100 μm as a support sheet. Prepared. As the resin for the binder of the picture ink, an acrylic resin and a vinyl chloride-vinyl acetate copolymer of 8: 2
(Weight ratio), and red pigment, isoindolinone, carbon black, and titanium white were used as coloring pigments.

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 on the uneven surface. 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 applying the melt at a rate of 30 g / m ² , the adhesive and the transferred substrate B are heated by the
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, the sheet supporting device 2
In step 2, both ends of the transfer sheet S in the width direction were sandwiched between the front and back sides. At that time, the register of the transfer sheet was matched with the joint of the transfer sheet. In that state, the support sheet 1 of the transfer sheet S
From the side, 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.

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 equal to or lower than the bonding temperature, the support sheet 1 of the transfer sheet S was wound by the support sheet winder 23 via the support sheet processing mechanism 20A.

At this time, the support sheet 1 is
0 and the traveling direction after the peeling of the support sheet 1 is changed to a direction orthogonal to the previous traveling direction via the inclined guide roller 26 and the support sheet 1.
Is peeled off so that its surface is gradually inclined obliquely upward with respect to the transfer surface (irregular surface) of the substrate 1 to be transferred, and most of the solid particles P on the support sheet 1 are supported. The slant of the body sheet 1 causes the body sheet 1 to flow down to the right end side in the width direction, and is removed by the solid particle collection drain 135 on the lower right side of the conveyance path of the transfer-receiving base material B and removed from the support sheet 1, Further, the support sheet 1 is turned over by the inclined guide roller 26 and the reverse guide roller 27, and the unevenness (401, 402, 40) of the substrate to be transferred formed on the support sheet 1 is formed.
All of the solid particles P remaining in the recesses 101, 102,... Corresponding to 3) are dropped and removed to the side of the transfer path of the substrate B to be transferred. The solid particles were almost completely removed.

The solid particles P that have been removed and fallen fall into the extended portion 30c of the chamber 33 (the solid particle collecting drain 13).
The chamber 33 passes through the return channel 30e formed in 5).
Moved to the bottom and re-used. The decorative material 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.

[0131]

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.

Further, it is possible to transfer the pattern on the convex portion of the large irregular surface and the inside of the concave portion (the bottom portion or the side surface which is the connecting portion between the convex portion and the bottom portion). Further, even when there is a finer uneven pattern (for example, a hairline, a satin finish, etc.) on the convex part of the large unevenness, the decoration can be transferred to the concave part of the fine unevenness.

Further, almost all of the solid particles used for forming the transfer pressure are collected in the recirculation path without being discharged to the outside of the machine, and are reused. No waste, no loss of solid particles, and
Continuous transfer becomes possible.

Further, unlike the conventional rubber roller pressing method, there is no wear of parts such as the rollers due to the uneven portions of the substrate to be transferred. As a result, a decorative material having an extremely excellent design property is obtained, which has never been obtained before.

In addition to the above, according to the method and the apparatus for transferring to an uneven substrate according to the present invention, the solid particles on the support sheet 1 are turned by turning and turning the support sheet 1 in the horizontal direction. So that a powerful blower for removing solid particles is not required, and only relatively inexpensive guide rollers etc. are used.
The solid particles can be rationally, reliably and rapidly removed from the support sheet without having to stop or slow down the support sheet for removing the solid particles. As a result, an excellent effect that the production efficiency is improved and high-speed production can be achieved is obtained.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram outlining a method of transferring to an uneven substrate according to the present invention.

FIG. 2 is a conceptual diagram schematically illustrating an apparatus for transferring to an uneven substrate according to 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.

FIG. 13 is a conceptual diagram of one embodiment of an apparatus for transferring to an uneven substrate according to the present invention, which can perform the method for transferring to an uneven substrate according to the present invention.

FIG. 14 is a schematic sectional view taken along the line YY of FIG. 13;

FIG. 15 is a perspective view illustrating a portion between an upstream guide roller and a peeling roller in FIG. 13;

FIG. 16 is a partially enlarged plan view used for describing a support sheet processing mechanism of the apparatus shown in FIG. 13;

FIG. 17 is a schematic sectional view taken along the line XX of FIG. 13;

FIG. 18 is a partially enlarged perspective view for explaining a support sheet processing mechanism of the apparatus shown in FIG. 13;

FIG. 19 is a conceptual diagram used for explaining solid particle removal in the method of transferring to an uneven substrate according to the present invention.

FIG. 20 is a conceptual diagram similarly used for explaining the removal of solid particles in the method of transferring to an uneven substrate according to the present invention.

FIG. 21 is a conceptual diagram for explaining solid particle removal in a conventional transfer method to an uneven substrate.

FIG. 22 is a conceptual diagram similarly used to explain the removal of solid particles in a conventional method of transferring to an uneven substrate.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Support sheet 2 Transfer layer 3 Ejector 10 Substrate conveyance device (substrate conveyance means) 20 Sheet supply device (sheet supply means) 20A Support sheet processing mechanism (support sheet processing means) 21 Support sheet unwinder Reference Signs List 22 sheet support device 23 support sheet winder 23a support sheet inclination guide roller 24 upstream guide roller 26 inclined guide roller 27 reverse guide roller 30 collision pressure application unit (collision pressure application unit) 31 hopper 32 ejector (solid) 33) Chamber 34 Drain tube 35 Separation device 36 Vacuum pump 40 Sheet heating device 41 Substrate heating device 50 Substrate coating device 60 Peeling roller (peeling device) 70 Cooling device 90 Suction / exhaust device (suction / exhaust device) 91 Suction / exhaust nozzle 92 Vacuum pump 135 Drain for collecting solid particles 101-103 Support Concave part of sheet 401 Groove part 402 Groove part 403 Fine irregularity 404 Flat convex part 812, 812a Impeller 813, 813a Blade 814, 814a Side plate 815 Hollow part 816 Direction controller 817 Opening 818 Sprayer 819, 819a Rotating shaft 820 Bearing 840 Jetting device using blowing nozzle 841 Induction chamber 842 Internal nozzle 843 Nozzle opening 844 Nozzle B Transfer receiving substrate D Cosmetic material P Solid particles R Sponge roller R1 Shaft core R2 Sponge S Transfer sheet

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Mitsuyoshi Miyakoshi, 1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo Inside Dai Nippon Printing Co., Ltd. (72) Inventor Reiko Suga 1-1-1, Ichigaga-cho, Shinjuku-ku, Tokyo No. 1 Inside Dai Nippon Printing Co., Ltd.

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. By transferring the transfer layer to the substrate to be transferred by peeling, the solid particles remaining on the support sheet are removed in parallel with or after the peeling of the support sheet. A method for transferring to a substrate, wherein the direction of peeling of the support sheet or the direction of travel after peeling is changed to a direction crossing or orthogonal to the direction of travel before that, and the front and back of the support sheet are reversed. Let the solid Transfer method to uneven substrate, wherein the child that was to remove by flow down and fall on the side of the conveying path of the transfer target substrate. 2. A series of operations of peeling the support sheet, changing the direction, and reversing the front and back are performed via a guide roller or a turn bar whose axis is inclined with respect to the transfer path of the transfer-receiving substrate. The method according to claim 1, wherein the method is performed. 3. The transfer layer side of a transfer sheet composed of a support sheet and a transfer layer is opposed to the uneven surface side of the substrate to be transferred having the uneven surface, and solid particles are coated on the support sheet side of the transfer sheet. An apparatus for performing a method of causing a transfer sheet to be pressed against an uneven surface of a substrate to be transferred by using the collision pressure by using the collision pressure, wherein at least a solid particle ejection means for ejecting solid particles Substrate transfer means for transferring a transfer-receiving substrate 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 transfer target substrate, and a transfer layer After being adhered to the substrate to be transferred, the support sheet of the transfer sheet is peeled off by being pulled upward or obliquely upward with respect to the substrate to be transferred, and the peeling direction of the support sheet or the traveling direction after the peeling is earlier than that. Progress Converts in a direction intersecting or orthogonal to direction, a support sheet processing means for winding by inverting the front and back of the support sheet,
A solid particle on the support sheet is caused to flow down and drop to the side of the transfer path of the base material to be transferred by the support sheet processing means. 4. The support sheet processing means is provided with a guide roller or a turn bar whose guide surface portion in contact with the support sheet is formed of a material having elasticity and flexibility such as rubber. The transfer device for transferring to an uneven substrate according to claim 3, characterized in that: