JP2001260598A - Transfer method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove foil burr or bridge even if generated in transfer to elimi nate the same. SOLUTION: When transfer is applied only on the transfer necessary region of a receiving base material B having the transfer necessary region Et and a transfer unnecessary region En, at first, a transfer sheet S consisting of a support sheet 1 and a transfer layer 2 is pressed or heated under pressure to bond the transfer layer to the receiving base material only on the transfer necessary region and the support sheet is peeled. Thereafter, the transfer layer remaining on the transfer unnecessary region to become foil burr 3 or bridge 4 is brought into contact with a low temperature fluid using liquid nitrogen or the like to be made fragile and broken to be removed. If a high pressure air stream is sprayed on the foil burr or bridge after cooling, it is easily broken and removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for producing a transfer material such as a decorative material used for the exterior, floor, wall and ceiling of a building. The present invention relates to a transfer method capable of removing a bridge.

[0002]

2. Description of the Related Art Heretofore, as a transfer method in which a transferred surface is an uneven surface and is transferred to a convex portion (necessary region for transfer) but not to a concave portion (necessary region for transfer), for example, Japanese Patent Publication No. Sho 60
As described in JP-A-59876, a transfer sheet is adhered only to a convex portion on a substrate to be transferred by a roller transfer method in which an adhesive layer is previously formed only on the convex portion and a transfer pressure is applied by a transfer roller. There was a transfer method to be performed. However, when the transfer is performed only on the transfer-required area on the transfer-receiving base material including the transfer-required area and the transfer-unrequired area, the transfer layer remains on the transfer-unnecessary area, and the foil flash is not removed. And bridges may occur.

[0003] Here, with respect to foil burrs and bridges, FIG.
Description will be made with reference to (A) and (B). FIG. 1 (A)
As shown in the figure, the transfer-receiving substrate B having the transfer-required region Et and the transfer-required region En (in the drawing, the adhesive layer A is formed only on the transfer-required region Et, and the transfer layer is thereby formed in the transfer-required region. When the transfer is performed using a transfer sheet S composed of a support sheet 1 and a transfer layer 2 on the transfer unnecessary area En as shown in FIG. The remaining transfer layer 2 becomes the foil burr 3 and the bridge 4.

[0004] The foil burr 3 is a transfer layer in which one end of the transfer layer is in close contact with the substrate to be transferred, but the other end is a free end. For example, a corner portion of the transfer-required area of the base material to be transferred (foil burr 3 at the right end in the drawing), a transfer-unrequired area which is a recess (foil burr 3 on a recess at the right-hand side of the drawing), or the outside of the transfer required area On the transfer unnecessary area (foil burr 3 on the left side of the drawing). That is, when the transfer layer extends and protrudes from just above the transfer necessary area toward directly above the transfer unnecessary area without cutting the transfer layer at the boundary between the transfer necessary area and the transfer unnecessary area, a foil burr is generated.

On the other hand, the bridge 4 referred to in the present invention is a portion of the transfer layer remaining on the substrate to be transferred after the transfer and extending from just above the transfer-necessary area to just above the transfer-unnecessary area. A transfer layer that is continuously bridged between adjacent transfer-required regions with the region interposed therebetween is referred to as a bridge.

As a transfer method for removing these, there have hitherto been the following methods, for example.

(1) As in the transfer method disclosed in Japanese Patent Application Laid-Open No. 5-270199, a transfer sheet is formed by using a hard elastic roller as a transfer roller by a roller transfer method, and the transfer sheet is formed on a convex portion on a base material to be transferred. After air-cooling, the support sheet of the transfer sheet is peeled off to improve the cutting of the foil at the boundary between the transfer-necessary area and the transfer-unnecessary area, and to prevent the occurrence of foil burrs and bridges Transfer method to transfer to (2) After the support sheet is peeled off and the transfer is completed, as in the transfer method disclosed in Japanese Patent No. 2977886,
A transfer method in which the generated burrs and bridges are blown away by blowing a fluid such as compressed air or water onto them.

[0008]

However, in the transfer method (1), foil burrs and bridges are still easily generated. And it took time and effort to remove the generated foil burrs and bridges manually. The transfer method of the above (2) is a method of removing the generated burr or bridge later. However, when the transfer layer is rich in elasticity and tough (for example, from a urethane-based resin without pigment or filler). In such cases, the transfer layer that has become a foil burr or a bridge is not easily cut, and it is also difficult to remove the transfer layer. On the other hand, the fluid can be improved to some extent by increasing the pressure and speed, but if the apparatus becomes bulky, the energy cost increases, or if the transferred substrate is fragile, the transferred substrate itself is used. There was a case where another problem such as breakage occurred.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a transfer method capable of easily eliminating a transfer failure even when foil burrs or bridges occur during transfer.

[0010]

Therefore, in order to solve the above-mentioned problems, in the transfer method of the present invention, transfer is performed only on a transfer-required area on a transfer-receiving substrate, which comprises a transfer-required area and a transfer-unnecessary area. In the method, first, a transfer sheet composed of a support sheet and a transfer layer is placed on the transfer substrate so that the transfer layer side faces the transfer substrate side, and is pressed or heated and pressed. The transfer layer is adhered to the substrate to be transferred only on the transfer-required area, the support sheet is peeled off, and the transfer layer remaining on the transfer-unrequired area is brought into contact with a low-temperature fluid. Cooled, embrittled, and broken to remove. For example, liquid nitrogen or the like is sprayed as a low-temperature fluid.

As described above, the transfer layer remaining as a foil burr or a bridge on the transfer unnecessary area is brought into contact with a low-temperature fluid to cool and embrittle, so that the transfer layer becomes brittle and easily cracked. So it is easily broken by the flow of fluid,
The transfer layer serving as a foil burr or a bridge can be removed. In particular, since the surface to be transferred is an uneven surface, it is effective when a highly elastic and tough resin such as a urethane-based resin is used for the resin of the transfer layer so that the transfer layer has an irregularity following property. is there.

Further, in the transfer method of the present invention, in the above method, the transfer layer remaining on the transfer unnecessary area is brought into contact with a low-temperature fluid to be cooled and embrittled, and then a high-pressure airflow is blown to the transfer layer. It was removed.

The transfer layer after being cooled and embrittled as described above,
By blowing a high-pressure air stream as a fluid flow, foil burrs and bridges can be easily removed. The high-pressure airflow may be separate from the low-temperature fluid for embrittlement, or may be the same.

Further, in the transfer method of the present invention, in any one of the above methods, a solid particle collision pressure is used as a means for pressing the transfer sheet.

As described above, by using the solid particle collision pressure as the transfer sheet pressurizing means, it is possible to transfer a transfer material having a complicated uneven shape or an uneven shape having a large step, which is difficult to transfer by a roller transfer method or the like. On the other hand, the transfer can be performed satisfactorily following the surface irregularities.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the transfer method of the present invention will be described.

[Low-temperature fluid] The low-temperature fluid may be any low-temperature fluid that can cool and embrittle the transfer layer with a fluid such as gas or liquid. Of course, when the low-temperature fluid is a liquid, a liquid that does not dissolve the transfer layer is selected. The fluid is preferably a safe fluid having no toxicity, flammability or flammability. Furthermore, it is preferable that the low-temperature fluid can be quickly and easily removed by vaporization, wiping or the like after removing the residual transfer layer (foil burrs, bridges). Accordingly, as the low-temperature fluid, for example, an inert gas such as air, nitrogen, carbon dioxide, helium, neon, or chlorofluorocarbon, or a liquid such as water may be used. The inert gas may be used as a liquefied gas (for example, liquefied nitrogen, liquefied carbon dioxide, or the like). Liquid is preferred in that embrittlement is unlikely to spread to areas other than foil burrs and bridges. This is because it is harder to diffuse than gas, and it is possible to selectively contact only a desired area by spraying, dripping, coating, or the like. The temperature of the low-temperature fluid may be a temperature at which the cooled transfer layer becomes brittle and breaks brittlely. When the main component of the transfer layer is a resin (binder), the temperature is preferably lower than the brittle temperature or glass transition temperature of the resin (binder). For example, polyethylene has an embrittlement temperature of -67 ° C.
Hereinafter, the glass transition temperature is -120C. Which of the embrittlement temperature and the glass transition temperature should be used as a guide may be a person who can easily obtain the temperature depending on a measuring instrument that can be prepared or a physical property information source. However, the embrittlement temperature is generally slightly higher than the glass transition temperature. Further, the lower the temperature of the low-temperature fluid, the more brittle it can be, so if liquid nitrogen (boiling point -196 ° C.) or a gas immediately after vaporization is used, it can be more strongly embrittled and the transfer layer becomes urethane. Even if the resin is rich in elasticity and tough, it can be reliably embrittled. In addition,
The embrittlement temperature is ASDT D-746 or JIS K
What is necessary is just to measure according to 7216 grade. The glass transition temperature may be measured by, for example, thermomechanical analysis.

In order to bring such a low-temperature fluid into contact with the transfer layer, spraying may be performed by a fluid spray nozzle or the like when the fluid is liquid or gas, or by drip or coating when the fluid is liquid. . As a specific example, for example, there is a method of spraying liquid nitrogen with a spray nozzle. The shape of the nozzle, the number of nozzles, and the like are not particularly limited, and may be determined according to the size of the transfer layer and the transferred material to be removed. For example, the nozzle opening shape is circular or slit-shaped, and the diameter or slit width is 0.3 to 1 mm. When a plurality of nozzles are used, the nozzles are arranged and used with a nozzle interval of 5 to 20 mm or the like.

When the transfer layer, which has become a foil burr or a bridge, is cooled by contact with the low-temperature fluid as described above, the transfer layer becomes brittle and easily breaks when an external force is applied. That is, since it is brittle, it is easily broken. As external force,
If the momentum (kinetic energy) of the flow of the low-temperature fluid in contact with the transfer layer is used, cooling and removal of foil burrs and bridges can be performed simultaneously. Alternatively, after the material is once cooled and embrittled with a low-temperature fluid, an external force different from that of the low-temperature fluid may be applied. For example, a high-pressure air stream such as air is blown. In this case, it is better to cool the high-pressure airflow, but the temperature may be higher than that of the low-temperature fluid used in the previous cooling as long as the brittleness of the once cooled transfer layer is not lost. For example, after the transfer layer is cooled with a cooling gas in which liquid nitrogen is vaporized and embrittled, a normal-temperature high-pressure gas is sprayed. In addition, room temperature is room temperature, which varies depending on the season, but is, for example, about 23 ° C. The pressure of the high-pressure airflow is such that the thickness of the transfer layer is 1 to 2
When it is about 0 μm, it is good to set it to about 0.05 to 5 MPa (old unit: 0.5 to ⁵ kgf / cm ² ). A nozzle may be used for blowing the high-pressure airflow. The nozzle shape, the number of nozzles, and the like may be determined according to the size of the transfer layer to be removed and the size of the transferred material. For example, the nozzle opening shape is circular or slit-shaped, and the diameter or slit width is 0.3 to
1 mm. When a plurality of nozzles are used, the nozzles are arranged and used with a nozzle interval of 5 to 20 mm or the like.

As described above, when the low-temperature fluid is brought into contact with the transfer layer that has been left unnecessarily, or when a high-pressure airflow is blown, the foil burr 3 and the bridge 4 as shown in FIG.
The transferred material D is removed as shown in FIG.
Is obtained. The transfer material illustrated in FIG. 1C has only a transfer-required area in a transfer-receiving substrate having a transfer-required surface and a transfer-required region in a convex portion excluding a concave portion having a concave-convex surface. The adhesive layer A is laminated on the adhesive layer A, and the transfer layer 2 is laminated on the adhesive layer A.

[Substrate to be transferred] The substrate B to be transferred is not particularly limited. For example, the surface unevenness on the transfer surface side is arbitrary, but the present invention is particularly preferably an uneven shape having a concave portion as a transfer unnecessary area.

An example of the transfer-necessary area and the transfer-unnecessary area will be described with reference to the main part enlarged perspective view of FIG. The surface unevenness in the same figure is an example having a tiled joint groove-shaped unevenness. On the transfer surface side of the transfer substrate B,
It has large irregularities composed of large concave portions 401 (joint grooves) and large convex portions 402, and fine irregularities 403 on the large convex portions 402 (top surface). The uneven shape of the large irregularities is, for example, a step is 1 to 10 mm and a width of the concave is 1 to 1
0 mm, and the width of the convex portion is 5 mm or more. Also,
The fine irregularities are smaller than the large irregularities in both the steps and the width, for example, the steps are about 0.1 to 5 mm, the widths of the concave parts and the convex parts are 0.1 mm or more, and the convex parts of the large irregularities are formed. Is less than about の of the width. In the drawing, the transfer-necessary region Et is illustrated as a surface on a large convex portion 402 including a concave portion of the fine unevenness 403, and the transfer-unnecessary region En is illustrated as a large concave portion 401.

As an example of the combination of the large irregularities and the fine irregularities, for example, there are two-dimensional arrangement patterns of tiles, bricks, stones, etc. having joints, grooves, etc. as the large irregularities, on which fine irregularities are formed. Stucco-like, lysine-like spray-painted surface irregularities, granite cleavage or travertine marble stone surface and other stone-like irregularities, etc. There is a pattern having a paneling pattern having a sashimi, a seed (real) or the like, and a floating grain pattern having a woodgrain-like irregular pattern having a conduit groove, a raised annual ring, a hairline, and the like as fine irregularities thereon.

The material of the substrate to be transferred is, for example, an inorganic non-metal, metal, wood, plastic or the like.
Specifically, in the case of inorganic nonmetals, for example, papermaking cement, extrusion cement, slag cement, ALC (lightweight cellular concrete), GRC (glass fiber reinforced concrete), pulp cement, wood chip cement, asbestos cement,
Non-ceramic ceramic materials such as calcium silicate, gypsum and gypsum slag; and inorganic materials such as ceramics such as earthenware, pottery, porcelain, tableware, glass, and enamel. Further, in the metal system, for example, there are metal materials such as iron, aluminum, and copper. In the wood system, for example, cedar, cypress, oak, lauan,
There are veneers made of teak, etc., plywood, particle board, fiber board, laminated wood and the like. In the case of plastics, for example, there are resin materials such as polypropylene, ABS resin, and phenol resin.

The shape of the substrate to be transferred may be a flat plate, a bent plate, a columnar object, or the like, as long as the transfer layer can be transferred to the surface to be transferred.
It is optional, such as a three-dimensional object such as a molded product. For example, the base material to be transferred may be a flat plate material (having an envelope shape) as a whole, or a base material having two-dimensional irregularities whose cross section is convex or concave in an arc shape and curved in one direction. The transfer surface may be an uneven surface other than a flat surface.

It is to be noted that an undercoat layer may be provided on the substrate to be transferred in advance. As the undercoat layer, for example, an easy-adhesion primer for assisting the adhesion to the adhesive layer (the one to be applied to the substrate to be transferred or the adhesive layer as a part of the transfer layer), In the case of a base material, a sealer agent for preventing oozing of alkali, or a sealing agent for sealing and sealing fine irregularities and porosity on the surface is applied. Easy adhesion primer,
Isocyanate, as sealant or filler
Two-component cured urethane resin, epoxy resin, acrylic resin,
It is formed by coating a resin such as a vinyl acetate resin. As will be described later, an adhesive for adhering the transfer layer may be applied to the substrate to be transferred in advance. If the adhesive is applied only to the transfer-required area on the transfer-receiving substrate, it is possible to separate the transfer-required area and the transfer-unnecessary area even on the same plane.

[Transfer Sheet] As shown in FIG. 1 (A), the transfer sheet S is composed of a support sheet 1 and a transfer layer 2, and a transfer surface of a transfer-required area of a transfer substrate. There is no particular limitation as long as it can be transferred to a transfer sheet, and transfer sheets having various known structures can be used.

(Support Sheet) For example, as the support sheet 1, if the transfer surface of the transfer substrate (that is, the surface of the area requiring transfer) is a two-dimensional uneven surface (for example, a cylindrical surface), it is stretched. Even paper or metal foil having no properties may be able to follow the transfer sheet along the shape of the surface to be transferred, depending on the irregular shape. Therefore, in such a case, paper or metal foil may be used. When the surface to be transferred is a three-dimensional uneven surface, a support sheet having stretchability (elongation property) at least at the time of transfer is used. A typical example of the stretchable support sheet is a thermoplastic resin sheet (film). As the thermoplastic resin sheet, even a biaxially stretched polyethylene terephthalate film or the like, which has been frequently used in a conventional transfer method, can be used depending on the concavo-convex shape, heating conditions and collision pressure conditions. However, as the resin of the thermoplastic resin sheet that can be a preferred support sheet that easily develops extensibility at lower temperature and low pressure, for example, ethylene / terephthalate / isophthalate copolymer polyester, polybutylene terephthalate, polyester-based thermoplastic elastomer Such as thermoplastic polyester resin, polypropylene, polyethylene, polymethylpentene, ethylene-propylene copolymer, ethylene-propylene-butene terpolymer, polyolefin resin such as olefin-based thermoplastic elastomer, vinyl chloride resin, ethylene-
Resin film with single layer or different layers of single or mixture of vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, acrylic resin, polyamide resin, natural rubber, synthetic rubber, urethane-based thermoplastic elastomer, etc. (Sheet) can be used. These resin films are preferably low stretched or unstretched. For example, specifically, a polypropylene-based thermoplastic elastomer film is one of the preferable support sheets which has excellent stretching properties, does not generate hydrochloric acid gas during waste combustion, and is environmentally friendly.
The thickness of the support is usually from 20 to 200 μm.

The support sheet may be provided with a release layer as a component of the support sheet on the transfer layer side, if necessary, in order to improve the releasability from the transfer layer. When the support sheet is peeled off, the release layer is removed as a part of the support sheet from the transfer layer with respect to the transfer layer transferred to the transfer substrate side. 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.

(Transfer Layer) On the other hand, the transfer layer 2 is usually composed of at least a decorative layer, and a release layer, an adhesive layer and the like may also be a component of the transfer layer as appropriate. Further, the transfer layer may be a layer having various functions such as an antibacterial layer, an antifungal layer, and a conductive layer as a functional layer. The transfer layer is formed by any known forming method such as a conventionally known printing method, painting method, or hand drawing. When the adhesive layer is provided as the transfer layer, the adhesive layer on the transfer-receiving substrate side may be omitted.

(Transfer Layer: Decorative Layer) The decorative layer is formed by, for example, gravure printing, silk screen printing, offset printing,
Conventionally known methods such as gravure offset printing and ink jet printing, a pattern layer formed by printing a pattern or the like with a material, or a partial or entire surface of a metal such as aluminum, chromium, gold, or silver using a known vapor deposition method or the like. The metal thin film layer or the like formed on the substrate is used according to the application. A wood pattern, a stone pattern, a cloth pattern, a tile pattern, a brick pattern, a leather pattern, a character, a geometric pattern, a solid pattern, or the like is used as the pattern according to the surface irregularities of the substrate to be transferred. The ink (or coating liquid) for the picture layer, like a general ink (or coating liquid), includes a vehicle made of a binder and the like, a coloring agent such as a pigment and a dye, and various additives appropriately added thereto. As the binder resin, an acrylic resin, a vinyl chloride-vinyl acetate copolymer, a polyester resin, a cellulosic resin, a polyurethane resin, or the like, or a mixture containing them is used. Examples of the coloring agent include inorganic pigments such as titanium white, carbon black, red iron oxide, graphite, and ultramarine blue; organic pigments such as aniline black, quinacridone, isoindolinone, and phthalocyanine blue; aluminum foil powder; and titanium dioxide-coated mica foil powder. And other bright pigments or other dyes.

(Transfer Layer: Release Layer) A conventionally known transfer layer is used for adjusting the release property between the support sheet and the transfer layer and for protecting the surface of the transfer layer after the transfer. As in the case of the sheet, it may be appropriately provided on the support sheet side of the transfer layer as needed. For the release layer, for example, a resin or the like used as a binder of the picture layer ink is used. The release layer is transferred to the substrate side together with the decorative layer at the time of transfer, and covers the surface of the decorative layer.

(Transfer Layer: Functional Layer) The transfer layer may be a functional layer such as an antibacterial layer, an antifungal layer, or a conductive layer. For example, a known antibacterial agent such as zeolite powder carrying silver ions is used for the antibacterial layer, and 1
A known antifungal agent such as 0,10-oxybisphenoxyarsine, and a known conductive agent made of a powder such as graphite or silver in the conductive layer may be contained in the binder resin described in the picture layer. good. These layers may also be used as the picture layer.

[Transfer Pressure Pressing Method: Transfer Method] The method of applying the transfer pressure is not particularly limited. Accordingly, for example, the following known transfer method may be employed.

(1) Roller transfer method: The roller transfer method is described in, for example, JP-A-6-99550 and JP-A-8-286.
No. 599, Japanese Patent Publication No. 60-59876,
As described in JP-A-5-270199, this is a transfer method employing a conventional transfer pressure pressing method. That is, in the roller transfer method, the transfer pressure is applied by pressing the transfer sheet from the support sheet side by an elastic roller with the transfer layer facing the base material to be transferred. As the elastic roller, a roller in which the periphery of a rigid shaft made of iron or the like is covered with an elastic body is usually used. As the elastic body, silicone rubber, fluorine rubber, viton rubber, butadiene rubber, natural rubber or the like is used. The rubber hardness of the elastic roller is preferably set to 65 ° or less in order for the transfer sheet to follow the concave and convex portions on the convex portion of the top surface. The diameter of the elastic roller is usually about 5 to 20 cm. In addition, the elastic roller is usually heated by a heating source such as an internal electric heater or an external infrared radiation heater and used as a heating roller.

(2) Transfer method using solid particle collision pressure: Japanese Patent No. 2844424, Japanese Patent Laid-Open No. 10-193
No. 893 and the like. That is, as shown conceptually in FIG. 2, the transfer layer side of the transfer sheet S including the support sheet and the transfer layer is opposed to the transfer surface side of the transfer base material B, and the support sheet of the transfer sheet is A large number of solid particles P collide against the side, and the collision pressure is used as the transfer pressure to press the transfer sheet against the transfer surface of the transfer substrate. When the transfer layer is transferred to the transfer-substrate side and the transfer is performed, the transfer layer is adhered to the transfer-substrate, and then the support sheet of the transfer sheet is peeled off to complete the transfer. The arrow added to the solid particles P is a velocity vector of the solid particles. This transfer method is particularly suitable for the case of transferring to a complicated or deep fine uneven surface which cannot be performed by a roller transfer method or the like.

(3) Vacuum forming transfer method: JP-B-56-4
No. 5768 (overlay method), Japanese Patent Publication No. 60-58
No. 014 (vacuum press method) and the like,
A so-called vacuum forming and laminating method is used in which a transfer sheet is opposed or placed on a transfer-receiving substrate, and the transfer sheet is pressed against and transferred to the transfer-receiving substrate by a pressure difference caused by vacuum suction from at least the transfer-receiving substrate side. Transfer method.

(4) So-called injection molding simultaneous picture transfer method: As described in JP-A-6-315950 and JP-B-2-42080, after a transfer sheet is arranged between both male and female molds for injection molding. And a method of injecting and filling a resin in a fluid state into a mold by heating and melting or the like, laminating a transfer sheet on the surface of the resin molded article at the same time as forming the resin molded article, and peeling and transferring the support sheet of the transfer sheet.

(5) Wrapping transfer method: JP-B-61-
No. 5895, JP-A-5-330013, etc., while supplying a transfer sheet in the longitudinal direction of a transfer substrate having a columnar transfer surface such as a cylinder or a polygon, A transfer method using a so-called lapping method in which a transfer sheet is successively pressed against a plurality of side surfaces constituting a transfer-receiving substrate by rollers having different directions.

Next, the transfer method (2) using the solid particle collision pressure will be described in more detail.

As the solid particles, nonmetallic inorganic particles such as ceramic beads and glass beads, metal particles such as zinc and iron, and organic particles such as resin beads such as nylon beads and crosslinked rubber beads are used. Particle size is usually 10-1000μ
m. The solid particles are ejected from the ejector toward the transfer sheet, and the collision pressure that collides with the transfer sheet becomes the transfer pressure. Typically, an impeller or a blowing nozzle is used for the ejector. The impeller accelerates the solid particles by its rotation,
The blowing nozzle accelerates the solid particles with a high velocity fluid stream. 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 blast device sucks solid particles into the negative pressure section generated by the high-speed flow of compressed air,
Spouts with air. The wet blast device mixes and ejects solid particles with a liquid.

FIG. 3 and FIG. 4 show one of the ejectors by the impeller.
It is a conceptual diagram showing an example. The impeller 812 includes a plurality of impellers 8.
13 is fixed on both sides thereof by two side plates 814, and
The center of rotation is a hollow part 815 without blades 813
You. Further, a direction controller 816 is provided inside the hollow portion 815.
(See FIG. 4). The direction controller 816 is a part of the outer circumference.
Has a hollow cylindrical shape having an opening 817 opened in the circumferential direction.
The same axis of rotation as the axis of the impeller 812.
It can be turned upright. Direction control when using impeller
Fix the opening of the controller so that it faces the appropriate direction, and
Adjust the ejection direction of the particles. Furthermore, in this direction controller
In the part, the rotation axis which is hollow inside and is the same as the rotation axis of impeller 812
Another impeller of the wick is embedded as a spreader 818
(See FIG. 4). The sprayer 818 is shared with the outer impeller 812.
To rotate. And the center of rotation of the side plate 814
The rotating shaft 819 is fixed, and the rotating shaft 819 has a bearing 820.
A rotary power source such as an electric motor that is rotatably supported by a motor (not shown)
, And the impeller 812 rotates. Also
The rotating shaft 819 is composed of two side plates having a blade 813 between them.
814 is not penetrated and forms a space without axis
I have. Then, the solid particles P are hot inside the sprayer 818.
It is supplied through a transport pipe from a car or the like. Usually solid particles
Is supplied from above (directly above or obliquely above) the impeller. Scattered
The solid particles supplied into the sprinkler are spread outward by the impeller of the sprinkler.
Splatter. The scattered solid particles are
Emitted only in the direction allowed by opening 817
Between the blades 813 of the side impeller 812.
Paid. Then, it collides with the blade 813 and the impeller 812
It is accelerated by the rotational force of the gas and squirts from the impeller. Impeller 81
The dimensions of 2 are usually about 5 to 60 cm in diameter, and the width of the blade is 5
~ 20cm, the length of the blade is almost the diameter of the impeller
Degree, the rotation speed of the impeller is about 500-5000 rpm
is there. The ejection speed of solid particles is about 10 to 50 m / s.
Radiation density (total solid particles
Mass) is 10 to 150 kg / m ^TwoIt is about.

Next, FIG. 5 is a conceptual diagram showing an example of an ejector using an ejection nozzle. An ejector 840 shown in the figure is an example of an ejector in which a gas such as air is used as a solid particle accelerating fluid, and the gas and the solid particles are mixed and ejected when ejecting the solid particles. The ejector 840 includes an induction chamber 841 that mixes the solid particles P and the fluid F, an internal nozzle 842 that ejects the fluid into the induction chamber, and an ejection nozzle unit 844 that ejects the solid particles and the fluid from the nozzle opening 843. A fluid F in a pressurized state from a compressor or the like is ejected from an internal nozzle 842, passes through an induction chamber 841 and passes through a nozzle opening 84 of a nozzle 844.
3, a negative pressure is created by the action of a fluid flow flowing at a high speed in the guide chamber 841 in the ejector, and the negative pressure guides and mixes the solid particles into the fluid flow, thereby forming the solid particles in the fluid flow. It accelerates, conveys, and jets out together with the fluid flow from the nozzle opening 843 of the nozzle 844. In addition, there is a blowing nozzle or the like that uses a liquid as a solid particle acceleration fluid. The fluid pressure is generally about 0.01 to 1 MPa as a spray pressure. The flow velocity of the fluid flow is usually about 1 to 20 m / s for the liquid flow, and usually about 5 to 80 m / s for the air flow.

In the case where the pressure area cannot be formed into a desired shape and size by using only one jetting device, a plurality of jetting devices are used. Further, when actually transferring using solid particles, it is preferable that the solid particles are not scattered in the surrounding atmosphere and circulated and reused.In a chamber that separates the space to be transferred from the surrounding space,
It is preferable that the solid particles collide with the transfer sheet. The peeling of the support sheet may be performed outside the chamber.

Preferably, the transfer sheet composed of a support sheet of a thermoplastic resin is previously softened by heating with an infrared radiation heater or the like to impart stretchability. If the transfer substrate has a large heat capacity, it is preheated in advance. A layer (an adhesive layer, a picture layer, or the like) acting as a heat-sealing adhesive layer is such that solid particles collide with a transfer sheet in a state of being activated by heating. When transferring by thermal fusion, the timing of heating for activating and thermally fusing the layer to be thermally fused is, before the collision pressure is applied, during the collision pressure is applied, or before the collision pressure is applied and the heat is applied. Any of pressure and the like may be used. The heating is performed by heating the transfer sheet or the substrate to be transferred. In addition, heating during impact pressure
Heated solid particles or fluid for accelerating solid particles may be used as the heating fluid. In the above case, the transfer sheet follows the surface shape of the substrate to be transferred, is formed, and if the transfer layer is sufficiently in contact with the substrate to be transferred, cooling of the layer that is thermally fused by cooling means such as cold air is performed. May be promoted. Cold air is blown from the transfer sheet side or the transfer-receiving substrate side. Also, as cooling means,
Cooling solid particles and cooling fluids can also be used. In addition,
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.

[Post-processing] After the transfer processing, after further removing the foil burrs and bridges, the surface of the transferred product is further coated with a transparent protective layer or the like to impart durability, design feeling, etc. The layers may be painted. The overcoat layer may be a layer according to the use and required physical properties. As such an overcoat layer, for example, 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 resin. Further, if necessary, an ultraviolet absorber such as benzotriazole and ultrafine cerium oxide, a light stabilizer such as a hindered amine radical scavenger, and a particle comprising particles such as silica, spherical α-alumina, and flaky α-alumina. A paint to which a lubricant such as a lubricant or wax, a coloring pigment, an extender pigment, or the like is added is used. The coating may be performed by a known coating method such as spray coating, curtain coating, roll coating using a soft rubber roll, sponge roll, or the like.

[Use of transcript] The use of the transcript obtained by the transfer method of the present invention is not particularly limited. For example, as a cosmetic material, exterior walls such as siding, fences, roofs, gates, exteriors such as gable plates, wall surfaces, ceilings, interiors of buildings such as floors, window frames,
Doors, handrails, thresholds, facades for doors and other fittings, furniture such as wardrobes, cabinets for light electric and OA equipment such as TV receivers, and cosmetics for automobiles, trains, aircraft, ships, etc. Can be used in the field. The decorative material is used as a decorative board or the like. In addition, the shape of the transcript including the cosmetic material,
It is arbitrary such as a flat plate, a curved plate, a rod-shaped body, and a three-dimensional object. In particular, according to the present invention, a transferred material having a transfer-necessary area and a transfer-unnecessary area can be manufactured without a transfer defect such as a foil burr or a bridge. Is preferred.

[0048]

Next, the present invention will be further described with reference to Examples and Comparative Examples.

Example 1 In a transfer sheet, 1000 ppm of erucamide was added as a support sheet to 90 parts by mass of isotactic polypropylene as a hard segment and 10 parts by mass of atactic polypropylene as a soft segment. The added polypropylene olefin thermoplastic elastomer sheet (thickness 80μ)
m) was prepared by a T-die melting method. As a transfer layer on one side of this support sheet, a thermoplastic polyurethane-acryl block copolymer is used as a main component resin of a binder, and a coloring ink containing titanium white, isoindolinone yellow, quinacridone red and phthalocyanine blue as coloring agents. (Pattern pattern layer and colored solid layer) were formed by gravure printing to prepare a transfer sheet.

On the other hand, the substrate to be transferred B has a thickness of 18 m having an uneven shape as exemplified in an enlarged perspective view of a main part of FIG.
m calcium silicate plate was prepared. The concavo-convex shape is a concave-convex portion 401 serving as a large concave-convex joint groove having a depth of 3 mm and an opening width of 7 mm, and a convex portion 402 serving as a top surface of a brickwork pattern.
And a convexo-concave shape having fine grain-like irregularities 403 distributed on the convex portion 402 in a depth range of 0.1 to 2 mm. The transfer-necessary region Et was the entire surface of the convex portion 402 including the inside of the concave portion of the fine unevenness 403, and the transfer-unnecessary region En was the concave portion 401.

A two-part curable urethane resin adhesive (10 parts by mass of 1,6-hexamethylene diisocyanate as a curing agent per 100 parts by mass of acrylic polyol) is provided only on the transfer-required area of the substrate to be transferred. ) Was applied by a roll coating method using a sponge roller at an application amount of 30 g / m ² (based on solid content), and an adhesive layer was formed only on the area required for transfer.

Next, the transfer sheet was placed on the transfer substrate with its transfer layer side facing the above-mentioned transfer substrate (the adhesive layer had not been completely cured). Next, the transfer sheet is heated by a transfer roller heated at 150 ° C. (a rubber roller coated with a soft silicone rubber around the iron shaft core) to apply transfer pressure and heat to the transfer sheet, thereby forming a transfer layer on the transfer target material. After bonding including the surface of the fine unevenness 403 on the convex portion 402 which is a transfer necessary area, the support sheet was peeled off. As a result, foil burrs were formed on the transferred base material from the convex portions 402 serving as the top surface to the concave portions 401 serving as the joint grooves.

Next, in order to remove foil burrs, immediately after liquid nitrogen was vaporized, gaseous nitrogen at -196 ° C. was applied at a pressure of 0.2.
A nozzle was sprayed with a nozzle only on the portion of the foil burr with MPa, and the transfer layer that became the foil burr was cooled and embrittled. Immediately after this, the foil burr was pulverized and removed by blowing compressed air (0.5 MPa) at 15 ° C. with a nozzle. As a result, the transferred material was free of foil burrs.

Example 2 In Example 1, the transfer sheet was heated to 95 ° C. by heating and pressurizing the transfer-receiving surface of the transfer-receiving base material B coated with the adhesive in advance by blowing hot air. FIG. 3 shows the transfer sheet placed on the transfer surface on the side of the support sheet.
And, using an impeller-type ejector as shown in FIG. 4, solid particles of zinc spheres having an average particle diameter of 0.4 mm were subjected to a particle temperature of 33 ° C.
The collision was performed under the conditions of an ejection speed of 40 m / s and a projection density of 100 kg / m ² . Otherwise, the procedure was the same as in Example 1. As a result, when the transfer sheet was peeled, foil burrs were generated from the convex portion serving as the top surface to the concave portion serving as the joint groove when the support sheet was peeled off. Had no foil burrs.

[Comparative Example 1] In Example 1, cooling with liquid nitrogen was not performed, and only blowing of compressed air was performed. Foil burrs were removed to some extent but remained partially.

[0056]

According to the present invention, if the unnecessary transfer layer remaining on the transfer unnecessary area after transfer becomes a foil burr or a bridge, it can be easily removed. In particular, since the surface to be transferred is an uneven surface, it is effective when a highly elastic and tough resin such as a urethane-based resin is used for the resin of the transfer layer so that the transfer layer has an irregularity following property. is there. Further, after the foil burr or bridge is cooled and embrittled by a low-temperature fluid, it can be more easily removed by blowing a high-pressure airflow. In addition, by adopting the solid particle collision pressure as the transfer pressure, it is suitable for a transfer target substrate having a complicated uneven shape or an uneven shape having a large step, which is difficult to transfer by a roller transfer method or the like. The transfer can be performed following the surface irregularities.

[Brief description of the drawings]

FIG. 1 shows a transfer method of the present invention, a foil burr and a bridge,
The conceptual diagram explaining conceptually.

FIG. 2 is a conceptual diagram illustrating a transfer method using a solid particle collision pressure.

FIG. 3 is a perspective view conceptually illustrating an example of an ejector using an impeller for ejecting solid particles.

FIG. 4 is a conceptual diagram illustrating the inside of the impeller of FIG. 3;

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

FIG. 6 is an enlarged perspective view of an essential part showing an example of a concave-convex shape of a transfer-receiving substrate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support sheet 2 Transfer layer 3 Foil burr 4 Bridge 401 Large concave part (joint groove) 402 Large convex part (top surface) 403 Fine unevenness 812 Impeller 813 Blade 814 Side plate 815 Hollow part 816 Direction controller 817 Opening Part 818 Sprayer 819 Rotating shaft 820 Bearing 840 Ejector using blow nozzle 841 Induction chamber 842 Internal nozzle 843 Nozzle opening 844 Nozzle B Transfer substrate D Transfer material (cosmetic material, etc.) Et Transfer necessary area En Transfer unnecessary area F fluid P solid particles S transfer sheet

Claims (3)

[Claims] 1. A method for performing transfer only on a transfer-required area on a transfer-receiving substrate comprising a transfer-required area and a transfer-required area, comprising the steps of: first, transferring a transfer sheet comprising a support sheet and a transfer layer
With the transfer layer side facing the transfer substrate side, the transfer layer is placed on the transfer substrate and pressurized or heated and pressurized, and the transfer layer is transferred only on the transfer necessary area. Glued to
Then, the support sheet is peeled off, and then the transfer layer remaining on the transfer unnecessary area is brought into contact with a low-temperature fluid to be cooled and embrittled and then broken and removed. 2. The transfer method according to claim 1, wherein the transfer layer remaining on the transfer unnecessary area is brought into contact with a low-temperature fluid to be cooled and embrittled, and then the transfer layer is removed by blowing a high-pressure airflow. 3. The transfer method according to claim 1, wherein the means for pressing the transfer sheet uses a solid particle collision pressure.