JP2001001690A - Transfer sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shape a rugged pattern by bringing a lugged pattern giving layer into close contact with a base material sheet and surely separating them from a transfer layer as a support sheet integral with the rugged pattern giving layer and the base material sheet when transferred. SOLUTION: In the transfer sheet S comprising a support sheet 10 adhesively integrated with a base material sheet, having releasability from a release layer 21 and having a rugged pattern shaping layer 12 for shaping the rugged pattern on a surface of the release layer after transferring in such a manner that at least the release layer 21 and a design layer 23 are sequentially laminated as a transfer layer 20 on the surface of the sheet 10 of the rugged pattern forming layer side, the shaping layer is constituted of a cured material obtained by curing an aminoalkyd resin, the material sheet is constituted of a sheet for giving a polar functional group containing an active hydrogen by corona discharging at at least rugged pattern shaping layer side. In this case, the layer 23 may be laminated on the design layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer sheet capable of providing a transfer surface with a design having an uneven feeling. In particular, the concavo-convex pattern shaping layer on the substrate sheet has good adhesion to the substrate sheet,
The present invention relates to a transfer sheet that cures quickly and can reliably form an uneven pattern on a transfer surface.

[0002]

2. Description of the Related Art Conventionally, as a transfer sheet capable of simultaneously forming an uneven pattern on the surface of a transfer layer, a support sheet on which the transfer layer is laminated, for example, a cured product of an aminoalkyd resin on a base sheet is used. A support sheet having a configuration in which a concavo-convex pattern shaping layer is provided by printing or the like has been used (see JP-A-63-295300). When the support sheet is peeled off during the transfer, the concavo-convex pattern shaping layer is peeled off from the transfer layer integrally with the base sheet. As a result, the concavo-convex pattern of the concavo-convex pattern shaping layer is transferred after the transfer. It can be shaped on the surface of the layer.

[0003]

However, when an amino alkyd resin is used as the resin for the embossed pattern forming layer, the adhesion to the substrate sheet is poor. The improper pattern forming layer was peeled off from the substrate, and the concavo-convex pattern shaping layer was left on the object to be transferred together with the transfer layer.

Accordingly, an object of the present invention is to provide a transfer sheet which has good adhesion between a concavo-convex pattern shaping layer and a substrate sheet and can reliably form a concavo-convex pattern.

[0005]

Therefore, in order to solve the above-mentioned problems, in the transfer sheet of the present invention, on the base sheet having releasability, the transfer sheet is adhered and integrated with the base sheet and is formed with the release layer. A support sheet having a concavo-convex pattern shaping layer for shaping a concavo-convex pattern on the surface of the peeling layer after transfer, on the surface of the concavo-convex pattern shaping layer side of a support sheet, a release layer and a pattern layer. In a transfer sheet having a transfer layer formed by stacking at least sequentially, the concavo-convex pattern forming layer is made of a cured product obtained by curing an aminoalkyd resin, and the base sheet is at least active on the concavo-convex pattern forming layer side surface. The substrate sheet had a polar functional group containing hydrogen.

As described above, with respect to the substrate sheet provided with the concavo-convex pattern shaping layer in the support sheet, at least the surface on the side of the concavo-convex pattern shaping layer is a base sheet having a polar functional group containing active hydrogen. In addition, by forming the concavo-convex pattern shaping layer from a cured product obtained by curing an aminoalkyd resin,
Good adhesion between the concavo-convex pattern shaping layer and the base material sheet. During transfer, the base sheet and the concavo-convex pattern shaping layer are surely peeled off from the transfer layer as a unitary support sheet. Can be formed into a transfer sheet. Also,
By curing the amino alkyd resin with an acid catalyst,
The adhesion between the support sheet and the embossed pattern forming layer is further improved. In addition, the curing time of the embossed pattern shaping layer is fast and the productivity is excellent. If an adhesive layer is further provided on the picture layer as the transfer layer, the image can be transferred even when the transferred object has no adhesive property or when the adhesive layer is not formed on the transferred object side.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

Overview : The transfer sheet of the present invention is shown in FIG.
As shown in a cross-sectional view of a transfer sheet S having a basic configuration, the support sheet 10 includes a support sheet 10 having a specific configuration and a transfer layer 20 having a specific configuration. That is, the support sheet 10 has an aminoalkyd resin on at least the surface of the concavo-convex pattern shaping layer on the base sheet 11 having a polar functional group having active hydrogen and having a releasable property by corona discharge treatment or the like. Is formed by curing the cured product of the above, is adhered and integrated with the base material sheet 11, has releasability with the release layer 21 (of the transfer layer 20), and has irregularities for forming an uneven pattern on the release layer surface after transfer. It is configured to have the pattern shaping layer 12. On the other hand, the transfer layer 20
At least a release layer 21 and a picture layer 22 are laminated in this order on the surface of the support sheet 10 on the side of the surface on which the concavo-convex pattern shaping layer 12 is formed.

Further, the transfer sheet of the present invention is shown in FIG.
1B, the transfer layer 20 further includes an adhesive layer 2 on the picture layer 22 as shown in a transfer sheet S shown in FIG.
3, etc. may be used.

When the transfer is performed using the transfer sheet S of the present invention, as shown in the conceptual diagram of the transfer in FIG. The pattern shaping layer 12 is peeled off from the transfer layer 20 as a support sheet 10 integrally with the base sheet 11, and as a result, the concavo-convex pattern shaping layer 12 transfers at least the release layer 21 and the picture layer 22. The concavo-convex pattern 3 can be formed on the surface of the transfer layer 20 (composed of the release layer 21).

Since the pattern layer 22 is usually thin, it is difficult to express the uneven pattern 3 on the surface of the transfer layer by the pattern layer 22 by completely receiving the unevenness of the uneven pattern forming layer 12. Provide. Of course, the release layer 21 has the main purpose of protecting the surface of the picture layer, adjusting the adhesive force between the support sheet and the transfer layer to optimize the release force at the time of transfer, and the like. It may be a configuration that is carried by the layers.

Hereinafter, each layer will be further described.

Support sheet : The support sheet 10 comprises a base sheet 11 and an embossed pattern forming layer 12.

[Base Sheet] The base sheet 11 is not particularly limited as long as it has a releasable sheet in which a polar functional group having active hydrogen is provided on at least the surface of the concavo-convex pattern shaping layer. However, a resin sheet is typical. Examples of the resin of the resin sheet include (thermoplastic) polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polyarylate, polyethylene naphthalate, ethylene-terephthalate-isophthalate copolymer, polyethylene, polypropylene, polymethylpentene, Ethylene-propylene copolymer, polyolefin resin such as olefin-based thermoplastic elastomer,
Examples thereof include polyamides such as nylon 6 and nylon 66, and vinyl polymers such as polyvinyl chloride and vinylon. Above all,
A resin sheet made of a thermoplastic polyester resin, typically a biaxially stretched polyethylene terephthalate film, is typical. The thickness of the base sheet is usually 20 to 20.
It is about 0 μm.

The active hydrogen-containing polar functional groups (active hydrogen-containing polar functional groups) provided on the surface of the base sheet on the side of the concavo-convex pattern shaping layer include a hydroxyl group (-OH) and a carboxyl group (-COOH). And an amino group (—NH ₂ ). These polar functional groups are provided by performing a corona discharge treatment, a plasma treatment, an ozone spraying treatment, or the like on a predetermined surface side of the base sheet.

For example, when the resin of the base sheet is a polyester resin, when the base sheet is provided with an active hydrogen-containing polar functional group by a corona discharge treatment, the base sheet may be mixed with a specific resin used for the embossed pattern forming layer. In the combination, good adhesion between the substrate sheet and the concavo-convex pattern shaping layer can be obtained, and peeling between the base sheet and the concavo-convex pattern shaping layer during transfer can be prevented. Further, the polyester resin is excellent in both heat resistance and mechanical strength, and hardly causes breakage or deformation due to heat or stress during transfer, and breakage of the support sheet (base sheet) when the support sheet is peeled off, and It has good releasability from many resins used as a release layer of a transfer sheet, and is suitable as a base sheet of a support sheet from the viewpoint of availability and price.

[Uneven pattern shaping layer] Uneven pattern shaping layer 12
Is composed of (a resin of) a cured product of an aminoalkyd resin. In order to form the concavo-convex pattern shaping layer on the base material sheet, a layer having a desired concavo-convex pattern may be formed by a printing method or the like. As a printing method, for example, a known printing method such as gravure printing or silk screen printing may be adopted according to the height of the unevenness of the uneven pattern. When the unevenness of the uneven pattern is large, silk screen printing is particularly preferable.

Further, in the case where the concave and convex shape of the concave and convex pattern is faithfully formed according to a desired shape (for example, the shape of a conduit groove of a natural wooden board, Japanese Patent Application Laid-Open No. 57-87318, Japanese Patent Publication No. 57-2)
A method as disclosed in Japanese Patent Publication Nos. 2755 and 7-32476 is used. This is a method in which concavities and convexities having the same shape and reverse irregularities as a desired concavo-convex pattern are formed on the surface of a roll-shaped intaglio, and the concavo-convex shape is formed as a curable resin concavo-convex pattern on a base sheet. Basically, it comprises the following steps.

A cylindrical plate cylinder (roll-shaped intaglio plate) having the same shape as the target shape and the concavo-convex shape (concavo-convex pattern) having the reverse concavo-convex shape is prepared, and this is rotated around the axis. A continuous belt-shaped base sheet is supplied at the same speed as the peripheral speed of the plate cylinder. The base sheet and the plate cylinder are overlapped with each other via an uncured liquid composition of an ionizing radiation-curable resin, and are brought into close contact with each other, so that the liquid composition completely fills at least the concave portion of the plate cylinder. To The liquid composition is crosslinked and cured by irradiating it with ionizing radiation in that state. Thereafter, the base sheet is peeled and removed together with the cured product of the ionizing radiation-curable resin on which the uneven pattern on the plate cylinder is formed by adhering thereto.

As the amino alkyd resin, a known resin may be used. The amino alkyd resin is a resin in which an amino resin and an alkyd resin are blended. In addition, amino resin is urea, melamine, guanamine, aniline,
Sulfonamide, or a resin obtained by reacting formaldehyde with the amino group of an amino group-containing compound such as an amino group-containing acrylic resin, urea resin for urea, melamine resin for melamine, guanamine resin for gramamine, In the case of aniline, it is also called an aniline resin or the like. The alkyd resin is typically, for example, an ester of a dibasic acid such as phthalic anhydride and a polyhydric alcohol such as glycerin or pentaerythritol, and further modified with various oils or fatty acids such as castor oil. However, there are also modified alkyd resins such as rosin-modified alkyd resins modified with rosin and phenol, and phenol-modified alkyd resins.

As an acid catalyst for curing the aminoalkyd resin, a strong acid such as paratoluenesulfonic acid may be usually used. The amount of the acid catalyst added is 1 to the total amount of the resin component.
About 5% by weight. By using the acid catalyst, the heat-curing time is short, and the concavo-convex pattern shaping layer can be formed with high productivity.
However, when it is not particularly necessary to shorten the heat curing time, an amino alkyd resin to which no acid catalyst is added can be used.

The concavo-convex pattern 3 formed by the concavo-convex pattern shaping layer is not particularly limited. For example, as the concavo-convex shape, a wood grain conduit groove, a wood grain annual ring, a cleavage surface of granite, a grain, a satin finish, a hairline, There are linear grooves, tiled or brickwork joints, surface texture of cloth, squeezing, characters, geometric patterns, and the like. The depth of the concave portion (or the height of the convex portion) is
It may be set appropriately according to the application, but usually 1 to 10
It is about 0 μm.

Further, the uneven pattern shaping layer can adjust the glossiness of the transfer layer surface after the transfer. If the surface of the transfer layer is formed with fine irregularities such that irregularities cannot be seen at first glance,
The glossiness disappears and the mat becomes a mat (matte). If relatively large irregularities (patterns) are formed without shaping the fine irregularities, the irregularities (patterns) can be seen as a visually observable pattern. In order to adjust such fine unevenness such as glossiness, the fine unevenness pattern is not formed by printing, but a matting agent may be added to the uneven pattern forming layer. In this case, the glossiness can be adjusted by the minute unevenness at the same time as the formation of the uneven pattern. As a matting agent, silica, alumina,
A known filler such as calcium carbonate or barium sulfate may be used. A matting agent having a particle size of about 1 to 10 μm is used. The addition amount of silica is, for example, about 1 to 10% by weight based on the total amount of the resin component. The unevenness due to the uneven pattern shaping layer may be an unevenness due to only the fine unevenness, an unevenness only due to the visible unevenness pattern such as the wood grain conduit groove, or a combination thereof.

The embossed pattern forming layer is formed on the entire surface of the substrate sheet 1 as shown in FIG. 1A, except that it is formed as a separated and independent discontinuous layer that is not continuous over the entire surface. It may be formed as a continuous layer that is vertically continuous and has an uneven surface on the transfer layer side.

[Antistatic Layer] The antistatic layer 13 may be provided on the back side of the base sheet 11 (the side opposite to the transfer layer side) (see FIG. 3). As the antistatic layer, a known antistatic agent may be applied and formed. As the antistatic agent, one or a mixture of two or more antistatic agents such as a cationic surfactant, an amphoteric surfactant, an anionic surfactant and a nonionic surfactant may be used. For example, as the cationic activator, an antistatic agent such as methylsulfate trimethylammonium salt and fatty acid ester diethanolesteramide can be used. The antistatic layer may be formed by a known coating method. If it is desired to improve the adhesion between the antistatic layer and the substrate sheet, the substrate sheet may be subjected to a corona discharge treatment.

Transfer layer : The transfer layer 20 is formed on the support sheet 10
It comprises at least a release layer 21 and a picture layer 22 in order from the side.

[Release Layer] As the function of the release layer 21, a function of imparting an appropriate release force (by combination with a support sheet) as a conventionally known function in a transfer sheet is basically used. Has as a function. Further, the function of the release layer 21 is that the release layer 21 is formed on the surface of the support sheet 10 on the side where the uneven pattern shaping layer 12 is formed.
The function of receiving the uneven pattern 3 which becomes the unevenness after transfer may be provided in the release layer by absorbing (filling) the unevenness of the uneven pattern forming layer. Needless to say, in this case, the release layer has a thickness sufficient to receive the difference in height of the concavo-convex pattern to be formed, that is, a thickness capable of completely filling the concavo-convex height of the concavo-convex pattern shaping layer. Further, as a function of the release layer, when the next pattern layer is directly formed by printing on the concavo-convex pattern shaping layer, it can have a smoothing function so that it can be formed without printing omission. In this case, even if the release layer is not thick enough to completely fill the uneven height of the uneven pattern shaping layer, if the unevenness is such that the next picture layer can be formed without printing omission, the thickness such that the unevenness remains That's fine. In an extreme case, depending on the design of the pattern layer and the forming method, the release layer may be thick enough to absorb the unevenness of the uneven pattern forming layer only by the adhesive layer formed after the pattern layer.

Note that a protective layer (a protective layer will be described later) for protecting the transferred picture layer from scratches and the like may be provided between the release layer and the picture layer. In this case, Alternatively, the protective layer may have a function of absorbing the unevenness of the uneven pattern forming layer and receiving the uneven pattern (along with the release layer or the like). Therefore,
The release layer is used solely for the function of optimizing the release force (property), and the protective layer can also have the function of receiving the uneven pattern and the function of preventing print omission.

As the release layer 21 as described above, the releasability from a support sheet having a concavo-convex pattern shaping layer on the transfer layer side (peelability with the concavo-convex pattern shaping layer, separated discontinuous concavo-convex pattern shaping) The layer is not particularly limited as long as it has releasability from the substrate sheet exposed from between the layers, and may be formed by a conventionally known material and method. For example, as the resin for the release layer, acrylic resins such as polymethyl (meth) acrylate, polybutyl (meth) acrylate, methyl (meth) acrylate-butyl (meth) acrylate copolymer, nitrocellulose, cellulose acetate, and cellulose acetate propio Use is made of a single or a mixture of cellulose resins such as acrylates, polyester resins, and vinyl chloride-vinyl acetate copolymers. In order to maintain good releasability between the base sheet having the active hydrogen-containing polar functional group on the surface and the release layer,
Further, in order to keep the abrasion resistance of the release layer after transfer good, it is preferable to add a lubricant to the release layer. As a lubricant,
Waxes such as paraffin wax, montan-based wax and bis-amide-based wax, and silicone resins are used. The lubricant is added in an amount of about 1 to 5 parts by weight based on 100 parts by weight of the resin.

In the present invention, the surface of the base sheet is provided with an active hydrogen-containing polar functional group by corona discharge treatment or the like in order to improve the adhesion to the concavo-convex pattern forming layer. The base sheet is exposed from and between the continuous concavo-convex pattern shaping layers and comes into contact with the release layer, so that the adhesiveness (peel force) between the release layer and the base sheet is also increased. For this reason, even if the peeling force is undesirably too strong, the support sheet is difficult to peel off during transfer, which is inconvenient. However, this can be solved by appropriately selecting the resin as described above as the resin of the release layer. For example, when a polyester resin is used for the base sheet, an acrylic resin or the like is preferable in that an appropriate peeling force can be obtained.

The release layer is formed by a known printing method such as a printing method such as gravure printing or silk screen printing, or a coating method such as gravure coating or roll coating with an ink or coating liquid using the above resin. Just do it. The thickness of the release layer may be appropriately determined depending on the depth (or height) of the concavo-convex pattern, the application, required physical properties, and the like.
It is about 00 μm.

[Pattern layer] The pattern layer 22 is formed by gravure printing,
The pattern may be formed by a conventionally known forming method and material such as silk screen printing and offset printing. The pattern is suitable for the application, for example, wood pattern, stone pattern, cloth pattern, tile pattern, brick pattern, leather pattern,
A character, a geometric pattern, a solid surface, a combination thereof, or the like is used. The entire surface can be formed by a coating method such as gravure coating. In addition, the entire solid is often used as a colored concealing layer. Usually, the pattern layer is
It is often composed of a pattern pattern layer having a pattern pattern and a colored concealing layer.

The ink (or coating liquid) for forming the picture layer is made of a vehicle such as a binder, a coloring agent such as a pigment or a dye, and various additives appropriately added thereto, similarly to a general ink (or coating liquid). Become. The resin used for the binder is, for example, an acrylic resin, a vinyl chloride-vinyl acetate copolymer,
A simple substance such as a polyester resin, a cellulosic resin, or a polyurethane resin or a mixture containing these is used. As a coloring agent, titanium white, carbon black, red iron oxide, graphite, inorganic pigments such as ultramarine blue, aniline black, quinacridone, isoindolinone, organic pigments such as phthalocyanine blue,
Bright pigments such as titanium dioxide-coated mica, foil powder of aluminum or the like, or other dyes are used.

Further, a metal thin film layer or the like may be used as the picture layer. The metal thin film layer is formed by a vacuum evaporation method, a sputtering method, or the like using aluminum, brass, gold, silver, copper, chromium, or the like. In addition, the metal thin film layer is an entire surface or a partial (picture-like or the like) layer.

[Adhesive Layer] The adhesive layer 23 is a layer for transferring and adhering the transfer layer to the object to be transferred, and may be provided if necessary. The picture layer itself has the role of an adhesive layer,
If an adhesive layer is provided on the transfer object side, the adhesive layer on the transfer sheet side is not always necessary. As the adhesive layer, a conventionally known thermoplastic resin, curable resin, or the like may be used. For example, acrylic resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer, thermoplastic polyester resin, thermoplastic urethane resin, polyamide resin, ionomer, thermoplastic resin such as chlorinated polyolefin, or phenol resin, block isocyanate curing A thermosetting resin such as a mold urethane resin or the like is used as one type or a mixture of two or more types. The adhesive layer may be formed by a known coating method such as gravure roll coating of a coating liquid composed of the above resin. The thickness of the adhesive layer is not particularly limited, but is usually 1
About 100 μm.

[Other Layers] In the transfer sheet of the present invention,
For example, the transfer layer may have a layer other than the release layer, the pattern layer, and the adhesive layer. For example, a protective layer for providing surface properties (abrasion resistance or solvent resistance) or the like is provided exclusively between the peeling layer and the picture layer, or between the peeling layer and the picture layer, or between the picture layer and the adhesive layer. An easy adhesion layer for improving the adhesion may be provided. Incidentally, in the transfer sheet S of the present invention illustrated in FIG. 3, the protective layer 24 includes the release layer 21 and the picture layer 22.
The transfer sheet is provided between the protective layer 24 and the picture layer 22.

As the protective layer 24, a curable resin such as a known two-component curable resin (for example, urethane resin or acrylic resin) or an ionizing radiation-curable resin that is cured by ionizing radiation such as ultraviolet rays or electron beams is used. Is preferred in terms of surface properties such as abrasion resistance and solvent resistance. In particular, in order to impart abrasion resistance, it is preferable to add a lubricant composed of hard inorganic particles. Examples of such a lubricant include alumina such as α-alumina, silica, silicon carbide, diamond and the like. The shape of the lubricant is spherical, polygonal, scale-like or the like. The lubricant has an average particle size of 3 to 50.
About 5 to 30% by weight of about μm is added. The protective layer may be formed by applying a coating liquid composed of these resins by a known coating method.

The easy-adhesion layer 25 is a layer used as a primer layer and the like. If necessary, a known primer composed of a two-component curable urethane resin or the like may be appropriately formed by a known coating method.

Transfer method of transfer sheet : A normal transfer method using pressure can be applied as a transfer method for transferring to a transfer target using the transfer sheet of the present invention. In that case, the action of heat is used as needed. In particular, when the transfer surface of the transfer object has a three-dimensional uneven shape, it is preferable to use both heat and pressure. For example, the following various transfer methods can be applied.

As described in JP-B-60-59876 and JP-A-5-139097, a transfer sheet is placed on a transfer object so that the transfer layer faces the transfer object side, and is supported. After applying pressure from the body sheet side with an elastic roller (a roller in which the surface of the iron core is covered with silicone rubber or the like) to adhere the transfer layer to the transfer target, only the support sheet is peeled off. Roller transfer method. JP-B-56-45768 (overlay method),
As described in Japanese Patent Publication No. 60-58014 (vacuum pressing method) or the like, a transfer sheet is placed on the surface of a three-dimensional article such as a molded article, facing or placed with an adhesive therebetween as necessary. A transfer method using a so-called vacuum forming and laminating method (a vacuum forming transfer method) in which a transfer layer of a transfer sheet is transferred to the surface of a three-dimensional article by a pressure difference caused by vacuum suction from the three-dimensional article side. As described in JP-A-6-315950,
After placing the transfer sheet between the male and female molds for injection molding so that the transfer layer side faces the injection resin side, the molten resin is injected and filled into the mold, and simultaneously with the molding of the resin molded product. A so-called injection molding simultaneous painting transfer method in which a transfer layer is transferred from the transfer sheet to the surface.

Japanese Patent Publication No. 61-5895, JP-A-5-5895
As described in JP-330013, etc., in the major axis direction of a columnar substrate such as a cylinder and a polygonal column, a transfer sheet is supplied in a plurality of directions while appropriately supplying an intervening adhesive layer therebetween as necessary. A transfer method based on a so-called lapping method in which a transfer sheet is transferred by sequentially pressing and attaching a transfer sheet to a plurality of side surfaces constituting a columnar base material using different rollers. Japanese Patent No. 2844424, Japanese Patent Laid-Open No. 10-1938
As disclosed in Japanese Patent Publication No. 93-93, etc., a transfer method utilizing solid particle collision pressure is a novel transfer method in which the transfer pressure pressing means itself is a novel transfer method. This transfer method is particularly effective when transferring to an uneven surface. That is, the transfer layer side of the transfer sheet is opposed to the transfer object, a large number of solid particles are made to collide with the support sheet side, and the transfer sheet is shaped by following the surface shape of the transfer object by the collision pressure. How to Note that metal beads or the like are used as the solid particles.

In addition, BMC (Bulk Molding Compoun
d) Molding method, SMC (Sheet Molding Compound) molding method,
FRP (Fiber Reinforced
Plastics) or RIM (React
ion injection molding), a transfer method performed simultaneously with molding such as a matched mold molding method, and the like.

The above-mentioned and and are intended to be transferred onto an already-formed transfer object, and are to be transferred simultaneously with the development of the shape of the transfer object as a resin molded product. In addition, in the above method, there is also a method in which after a transfer sheet is preformed by using a resin mold or another mold, the resin is injection-molded and transferred at the same time as molding. Similarly, in the methods listed above, the transfer sheet may be formed simultaneously with resin molding, or may be preformed before resin molding. In the hand lay-up method, the transfer sheet is formed by preliminary forming.

[Transfer object] The transfer object B to be transferred by the transfer sheet of the present invention is not particularly limited. What is necessary is just to use an appropriate thing according to a use. For example, the material of the transfer target is a wood type, an inorganic nonmetal type, a metal type, a plastic type, or the like. Specifically, in the wood system, for example, cedar,
There are veneers, plywood, particleboard, fiberboard, laminated wood, etc. made of cypress, oak, lauan, teak and the like. In the case of inorganic nonmetals, for example, extruded cement, slag cement, A
Non-ceramic ceramic materials such as LC (lightweight cellular concrete), GRC (glass fiber reinforced concrete), pulp cement, wood chip cement, asbestos cement, calcium silicate, gypsum, gypsum slag, earthenware, pottery, porcelain, setware, glass ,
There are inorganic materials such as ceramics such as enamel. Also,
In the metal system, for example, there are metal materials such as iron, aluminum, and copper. In the case of plastics, for example, there are resin materials such as polypropylene, ABS resin, and phenol resin.

[Use of Transfer Product] The use of the transfer product obtained by using the transfer sheet of the present invention is not particularly limited. For example, exterior walls such as siding, fences, roofs, gates,
Exterior of building such as gable board, interior of building such as wall, ceiling, floor, window frame, door, handrail, sill, surface decoration of fittings such as sill, furniture such as chest of drawers, kitchen cabinet and TV receiver etc. Surface decoration of cabinets for light electric / OA equipment, interior materials for vehicles such as automobiles, trains, aircraft, and ships. The shape of the transfer product is arbitrary, such as a flat plate, a curved plate, a rod, a three-dimensional object, and the like.

[0046]

The present invention will be described in more detail with reference to the following Examples and Comparative Examples.

Example 1 A transfer sheet S as shown in FIG. 3 was prepared as follows. After applying corona discharge treatment to both surfaces of a base sheet 11 made of a biaxially stretched polyethylene terephthalate film having a thickness of 26 μm to provide active hydrogen-containing polar functional groups on the surface, trimethylammonium methylsulfate and fatty acid ester diethanol were provided on one surface. An antistatic agent in which an ester amide and a 1: 1 weight ratio were blended was gravure coated to form an antistatic agent 13. Next, on the other surface of the base sheet, 100 parts by weight of aminoalkyd resin, 4 parts by weight of p-toluenesulfonic acid as an acid catalyst, and gravure printing of an ink obtained by adding silica as a matting agent were performed. The substrate was cured by heating for 2 seconds to form an uneven pattern forming layer 12 having a thickness (or height) of 2 μm so that the base material sheet 11 was partially exposed in a wood-grain conduit groove pattern.

Next, on the surface of the support sheet 10 on which the uneven pattern shaping layer 12 was formed, as a transfer layer 20, first, a mixture 100 of an acrylic resin and a polyester resin having a weight average molecular weight of 100,000 was used. A coating liquid using 3 parts by weight of paraffin wax added to the parts by weight was gravure coated to form a release layer 21 having a thickness of 2 μm. This release layer is a layer that becomes a receiving layer having a concavo-convex pattern together with an appropriate release force and the next protective layer.

Next, as a protective layer for imparting abrasion resistance and solvent resistance on the release layer 21, 100 parts by weight of acrylic polyol and 12 parts by weight of a silane coupling agent as a curing agent were blended. Liquid curable acrylic resin 100
Α- of cubic shape with an average particle size of 3 μm with respect to parts by weight
A coating liquid containing 30 parts by weight of alumina particles was subjected to gravure coating, and the resin was cured by heating to crosslink, thereby forming a protective layer 24 having a thickness of 3 μm. The protective layer also has a function of preventing the occurrence of ink loss at the time of printing the picture layer due to the unevenness of the uneven pattern forming layer.

Next, a coating liquid made of an acrylic resin is gravure-coated on the protective layer 24 as an easy-adhesion layer (primer layer) for improving the adhesion between the protective layer and the picture layer.
An easy adhesion layer 25 having a thickness of 3 μm was formed. Since the protective layer 24 contains alumina particles, the surface of the protective layer (on the side where the pattern layer is formed) becomes an uneven surface. It also has the function of preventing ink loss during formation and improving printability.

Next, on the easy-adhesion layer 25, a binder resin is a one-to-one binder resin of acrylic resin and nitrocellulose.
Gravure printing of an ink using a colorant mainly composed of red iron oxide (ferric oxide), carbon black, titanium white, phthalocyanine blue, and isoindolinone yellow, using a mixture of weight ratio, The pattern pattern layer having the pattern pattern and the color concealing layer having the color concealing property were sequentially formed to form a picture layer 22.

Next, on the pattern layer 22, a polyamide resin-based adhesive comprising a condensate of dimer acid and ethylenediamine is gravure-coated to form a heat-sensitive adhesive layer 23 having a thickness of 20 μm. Formed, release layer 21, protective layer 2
4. The transfer layer 20 including the easy-adhesion layer 25, the picture layer 22, and the adhesive layer 23 was formed to obtain the transfer sheet S of the present invention.

Example 2 In Example 1, only the aminoalkyd resin was used for the embossed pattern forming layer 12 (paratoluenesulfonic acid as an acid catalyst was not added).
A transfer sheet was prepared in the same manner as in Example 1, except that the heating and curing conditions were changed to 120 ° C. for 5 minutes.

Comparative Example 1 A transfer sheet was prepared in the same manner as in Example 1 except that the corona discharge treatment on both surfaces of the base sheet 11 was omitted.

[Evaluation of Performance] In order to evaluate the performance of each of the transfer sheets described above, the transfer material was transferred by an elastic roller transfer method using a heated rubber roller whose surface was coated with silicone rubber and heated to a surface temperature of 200 ° C. Wood mid-density fiberboard (MDF) with a surface treated with a urethane resin-based sealer
A test piece was prepared by transferring the sample to a 5 mm-thick flat plate at a transfer speed of 3 m / min to evaluate whether or not a concavo-convex pattern was formed. The results shown in Table 1 were obtained.

[0056]

[Table 1]

As shown in Table 1, in Example 1 in which the base sheet was subjected to the corona discharge treatment, the adhesion between the embossed pattern forming layer and the base sheet was good. The shape layer was peeled off from the transfer layer integrally with the base sheet, and the uneven pattern could be formed on the transfer layer without any problem. Further, in Example 2 in which the corona discharge treatment of the base sheet was performed but the acid catalyst was not used for forming the embossed pattern shaping layer, when the support sheet was peeled off, the embossed pattern shaping layer and the base sheet were separated. The concavo-convex pattern could be formed on the transfer layer without any problem by integrally peeling off from the transfer layer, but the curing time required 5 minutes at 120 ° C. On the other hand, in Example 1 in which an acid catalyst was used for forming the concavo-convex pattern shaping layer, the time required for curing the concavo-convex pattern shaping layer was as short as 10 seconds at 120 ° C., and the product could be formed with high productivity.

However, in Comparative Example 1 in which the base sheet was not subjected to the corona discharge treatment, the irregular pattern-shaped layer was separated from the base sheet and remained on the transfer layer side when the support sheet was separated.

[0059]

According to the transfer sheet of the present invention, an active hydrogen-containing polar functional group is imparted to the surface of a substrate sheet provided with an embossed pattern forming layer in a support sheet by corona discharge treatment or the like, and Since the concavo-convex pattern shaping layer is composed of a cured product of aminoalkyd resin, the adhesion between the concavo-convex pattern shaping layer and the substrate sheet is good, and the base sheet and the concavo-convex pattern shaping layer are integrated during transfer. As a result, the support sheet can be reliably peeled off from the transfer layer to form an uneven pattern on the transfer layer. When the embossed pattern forming layer is made of an amino alkyd resin cured by an acid catalyst, the curing time of the embossed pattern shaping layer is short, and the productivity is excellent. If an adhesive layer is further provided on the picture layer, the image can be transferred even when the transfer object has no adhesive property or when the adhesive layer is not formed on the transfer object side.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating some forms of a transfer sheet of the present invention.

FIG. 2 shows a transfer (in the case of an elastic roller transfer method)
The conceptual diagram which shows a mode that an uneven | corrugated pattern is shape | molded on a transfer layer by an uneven | corrugated pattern shaping layer.

FIG. 3 is a cross-sectional view illustrating another embodiment of the transfer sheet of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Support sheet 11 Substrate sheet 12 Concavo-convex pattern shaping layer 20 Transfer layer 21 Release layer 22 Picture layer 23 Adhesive layer 24 Protective layer 25 Easy-adhesion layer (primer layer) 3 Concavo-convex pattern B Transfer object S Transfer sheet

 ────────────────────────────────────────────────── ─── Continued on the front page F-term (reference) 3B005 EA06 FB03 FE09 FG04X FG06X 4F100 AA01 AA19H AA20H AJ11 AK25 AK41 AK41B AK42 AR00A AR00B AR00C AR00D AS00 BA04 BA07 BA10A BA10D CA21 J31 CB00 CC00B01B01 CB00 CC00B01B03 J00

Claims (3)

[Claims] An irregularity for forming an irregular pattern on the surface of a release layer after transfer, which is adhered and integrated with the substrate sheet and has a release property with a release layer. A transfer sheet in which a transfer layer formed by laminating a release layer and a picture layer at least sequentially on a surface of the support sheet having a pattern shaping layer on the side of the concavo-convex pattern shaping layer is provided. A transfer sheet, wherein the layer is made of a cured product obtained by curing an amino alkyd resin, and the base sheet is a base sheet having a polar functional group containing active hydrogen on at least the surface of the embossed pattern forming layer. 2. The transfer sheet according to claim 1, wherein the transfer layer is a transfer layer obtained by further laminating an adhesive layer on a picture layer. 3. The transfer sheet according to claim 1, wherein the concavo-convex pattern shaping layer comprises a cured product obtained by curing an aminoalkyd resin with an acid catalyst.