JPH09295497A - Transfer sheet and transfer method using that - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sheet suitable for transfer of a pattern or the like to a columnar base material having a three dimensional irregular shape on a surface by a method wherein a transfer layer equipped with a protective layer is provided on a heat shrinkable base material sheet. SOLUTION: A transfer sheet 1 is constituted by providing a transfer sheet 3 on a heat shrinkable base material sheet 2. For the heat shrinkable base material sheet 2, a sheet like base material shrinking by heating satisfies the purpose, and a monoaxially or biaxially orientation processed polyvinyl chloride resin film, a polystyrene resin film, etc., are preferably used. In order to form the transfer layer 3, a release layer 21 of polyethylene resin, fluoro resin, etc., is provided as occasion demands, and a transfer property of the transfer layer 3 is improved. To the transfer layer 3, other than a pattern layer 33 giving a decorative property to a base material 4, a peeling layer 31 giving a peeling property, a protective layer 32 giving surface physical properties of scratch resistance, abrasion resistance, solvent resistance, etc., to a surface after transfer, an adhesion layer 34 giving adhesion to the base material 4, etc., may be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer sheet suitable for transferring a pattern or the like to a columnar base material having a three-dimensional uneven shape on the surface, such as a pillar material, a furniture material, a frame material, and the like. The present invention relates to the transfer method used.

[0002]

2. Description of the Related Art Conventionally, as a method for painting a transferred material having a three-dimensional uneven shape on the surface thereof such as a foot material for furniture, there has been a hand-crafted method such as a hand-painted method. Typical examples of industrial methods suitable for mass production include a hydraulic transfer method, a vacuum transfer method, and a heat shrink film laminating method.

Among them, the hydraulic transfer method uses a transfer sheet in which a pattern transfer layer is formed on a water-soluble base sheet,
Float this on the water surface to dissolve the water-soluble base sheet, leaving only the transfer layer floating on the water surface, press the base material that is the transfer target here, and transfer the transfer layer while following the surface. It is a method to let.

This method is suitable for transferring a pattern to a substantially flat base material having a three-dimensional uneven surface, but when applied to a base material having a three-dimensional shape as a whole, such as a columnar base material. , The transfer layer is folded at the side and slope portions, and the pattern is disturbed, so it cannot be applied. In addition, it is difficult to apply to substrates with low water resistance, the type of ink that forms the pattern layer is limited, production equipment is expensive and productivity is low, and water temperature control is difficult. There was a problem that a person needs a high degree of skill.

The vacuum transfer method uses a transfer sheet in which a pattern transfer layer is formed on a thermoformable base sheet, and at the time of transfer, the thermoformable base sheet is deformed by heat while being transferred to a transfer target by pressure. The pattern transfer layer is made to adhere to the surface of a base material so as to follow the surface of a base material, and then transferred. Since a vacuum pressure is usually used as the above-mentioned pressure, it is called a vacuum transfer method, but it may be called a compressed air transfer method by using compressed air.

[0006] This method also has a limit to the ability to follow the three-dimensional shape of the thermoformable base sheet, and like the above-mentioned hydraulic transfer method, it also has an extreme three-dimensional shape such as a columnar base material. Transfer to the substrate is not possible. Although it is possible to transfer it to a side surface or a slope part to some extent, since the pattern is also greatly deformed and transferred with the deformation of the thermoformable base sheet at the time of transfer,
In designing a design, it is necessary to design in consideration of this deformation, and there is also a problem that a high degree of skill is required.

The heat-shrinkable film laminating method has been conventionally used as a so-called shrink label in the field of packaging containers, and a film having a pattern printed on the front or back surface of a heat-shrinkable base sheet is used as a PET bottle. The heat-shrinkable base material sheet is wound around a columnar object having a three-dimensional uneven shape on its surface, and the heat-shrinkable base material sheet is contracted by heating so as to follow the three-dimensional uneven shape of the surface of the object and adhere to it. Therefore, unlike the above-mentioned two methods, it is not suitable for forming a pattern only on the surface of a substantially flat base material (that is, not including the side surface and the back surface), but a columnar shape having a three-dimensional uneven shape on the surface is used. It can be suitably used for the side surface of the base material, and since it does not require application or curing of an adhesive, it is an excellent method in terms of productivity.

[0008] However, this method basically uses only the irregular shape of the base material for the connection, and is therefore suitable for temporary use such as a packaging container, but for heat-shrinkable base material sheets. When scratched, it easily peels off from that part, so it cannot be used for durable consumer goods such as building materials and furniture materials. Further, when the base material is in the form of a rotating body, the heat-shrinkable base material sheet on the surface may rotate on the surface of the base material to cause misalignment of the pattern. In addition, since the surface is a resin film, there are problems such as poor quality and poor texture.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems in the prior art, and transfers a pattern or the like to a columnar substrate having a three-dimensional uneven shape on the surface. And a transfer method using the transfer sheet.

[0010]

Means for Solving the Problems The transfer sheet of the present invention comprises:
A transfer layer is provided on the heat-shrinkable substrate sheet.

Further, in particular, the transfer layer is provided with a protective layer for improving the physical properties of the surface after transfer.

Further, in particular, the transfer layer is provided with an adhesive layer for adhering to the base material of the transferred material.

According to the transfer method of the present invention, a transfer sheet having a transfer layer on a heat-shrinkable base sheet is wound around a base material of a transfer target, and the heat-shrinkable base sheet of the transfer sheet is shrunk by heating. Then, the transfer is performed by bringing the transfer layer into close contact with the base material.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A transfer sheet of the present invention and a transfer method using the same will be described below in detail with reference to the drawings. 1 is a side sectional view showing an embodiment of a transfer sheet of the present invention, and FIG. 2 is a side sectional view showing an embodiment of a transfer method of the present invention in the order of steps.

The transfer sheet 1 of the present invention comprises, for example, as shown in FIG. 1, at least a transfer layer 3 on a heat-shrinkable base sheet 2. The heat-shrinkable substrate sheet 2 may be a film-shaped or sheet-shaped substrate having a property of shrinking by heating, and for example, various heat-shrinkable films conventionally used as a substrate for heat-shrinkable film lamination, That is, uniaxially or biaxially stretched polyvinyl chloride resin film, polystyrene resin film, polyester resin film, polypropylene resin film, etc.
Alternatively, a laminated body, a composite body or the like thereof can be preferably used.

Further, the transferability of the transfer layer 3 may be improved by providing a release layer 21 made of polyethylene resin, silicone resin, fluorine resin or the like on the surface on which the transfer layer 3 is formed, if necessary. it can. If necessary, the heat-shrinkable substrate sheet 2 may be provided with an embossing layer, a gloss adjusting layer, or the like for the purpose of imparting a fine uneven pattern to the surface of the transfer layer 3 after the transfer, or adjusting the gloss. .

The transfer layer 3 includes a pattern layer 33 for imparting a design property to the base material 4 and, if necessary, a heat shrinkable base material 2.
Release layer 31 for imparting releasability to the substrate, protective layer 32 for imparting surface physical properties such as scratch resistance, abrasion resistance and solvent resistance to the surface after transfer, adhesiveness to the substrate 4. You may provide the adhesive layer 34 etc. for giving. Further, when the purpose is simply to provide a surface protective layer without the need for a design,
It is also possible to omit the pattern layer 33. However, it is preferable that each of the materials forming the transfer layer 3 has flexibility or thermoformability capable of sufficiently following shrinkage / deformation of the heat-shrinkable base sheet 2 during transfer.

As the pattern layer 33, an organic or inorganic dye or pigment is used with an appropriate binder resin, and if necessary, an extender pigment, a filler, a dispersant, a plasticizer, a tackifier, a release agent, It is possible to use various printing inks, coating agents, paints, etc. dissolved or dispersed in an appropriate solvent together with additives such as flow cut agents, leveling agents, drying aids, foaming agents, stabilizers and surfactants. it can. In particular, when an ink having a binder resin such as a cellulose resin or an acrylic resin or an acrylic urethane resin, which has excellent releasability, such as cellulose nitrate or cellulose acetate is used, the release layer 21 and the release layer 3 are used.
This is preferable because good transferability can be obtained without providing 1. However, when the release layer 21 and the release layer 31 are used in combination, the material is not limited to them and any material can be used.

The release layer 31 is provided as needed, and when the heat-shrinkable base sheet 2 or the release layer 21 is provided, it is a substance having good release properties from the release layer 21. Anything can be used. Specifically, any conventionally known release agent resin, for example, cellulose nitrate, cellulose acetate or other fibrin resin, acrylic resin, styrene resin, urethane resin, melamine resin, chlorinated polypropylene resin, chlorinated rubber resin. Resins, vinyl chloride acetate resins, polyester resins and the like, or mixtures, copolymers, composites and laminates thereof can be preferably used.

The protective layer 32 is also provided as needed, and any conventionally known protective layer material for a transfer sheet, such as an acrylic resin, a urethane resin,
Thermosetting or radiation-curable resins having excellent surface hardness, heat resistance, solvent resistance, etc., such as melamine-based resins, epoxy-based resins, silicone-based resins, etc., or mixtures, copolymers, composites and laminates thereof. Etc. can be used suitably. As described above, when the protective layer 32 is provided as a part of the transfer layer 3, sufficient abrasion resistance and solvent resistance can be provided on the surface without additional coating after transfer of the transfer target to the base material. This is most suitable because a transfer painting product having surface properties such as stain resistance can be easily produced.

The adhesive layer 34 is also provided as necessary, and if it has adhesiveness (adhesiveness) at all times, a blocking / transfer preventing means such as release paper and an operation for removing it during transfer. Is necessary and inconvenient, so
It is preferable to use an adhesive that does not have adhesiveness in a normal state but exhibits adhesiveness at the time of transfer.

As such an adhesive, for example, a rewetting adhesive, a solvent activated adhesive, a pressure activated adhesive or the like can be used. Among them, for example, ethylene-vinyl acetate resin-based, ethylene-ethyl acrylate-based adhesive, A hot-melt adhesive containing a heat-adhesive resin such as polyamide-based, polyurethane-based, or polyester-based as a main component, or a heat-sensitive adhesive obtained by blending a heat-melting solid plasticizer with the heat-adhesive resin Then, the heat-shrinkable base sheet 2 at the time of transfer
It is most preferable because the adhesiveness and the tackiness can be developed by heating for shrinkage and adhesion, and the adhesiveness and tackiness can be adhered to the substrate 4.

These release layer 21, release layer 31, protective layer 3
2, the pattern layer 33, the adhesive layer 34 and the like are formed on the heat-shrinkable substrate 2 sheet, for example, a gravure printing method, an offset printing method, a relief printing method, a screen printing method, a flexo printing method, a dry offset printing. Method, various printing methods such as plateless printing, gravure coating, knife coating, air knife coating, wire bar coating, kiss coating, roll coating, spray coating, lip coating, comma coating, die coating Method, various coating methods such as Langmuir Blodgett method, brush coating method, spraying method, dipping method, electrostatic coating method, various coating methods such as electrodeposition coating method, vacuum deposition method, sputtering method, chemical vapor deposition method, etc. Any conventionally known method such as the vacuum film forming method described in (1) above can be used.

Using the transfer sheet having the above structure, a pattern can be transferred to the surface of the columnar substrate 4 having a three-dimensional uneven shape on the surface by the following procedure (FIG. 2). First, if necessary, an adhesive (not shown) is applied to the surface of the base material 4 or the surface of the transfer sheet 1 on the transfer layer 3 side, and then the transfer sheet 1 is wound around the base material 4 (a). This step can be efficiently carried out using the sealing machine conventionally used in the heat shrink film laminating method as it is.

Next, the base material 4 on which the transfer sheet 1 is wound.
Is heated to shrink the heat-shrinkable base material sheet 2 of the transfer sheet 1 so as to follow the three-dimensional uneven shape of the surface of the base material 4 and closely contact (b). In this step, the transfer layer 2 of the transfer sheet 1
Is adhered to the surface of the base material 4 via the adhesive layer 24 or an adhesive applied separately. After that, the heat-shrinkable base sheet 2 of the transfer sheet 1 is peeled and removed to complete the transfer (c). After this, if necessary, post-coating or embossing may be applied.

The transfer sheet of the present invention and the transfer method using the transfer sheet are not limited to the above-mentioned pillars, furniture materials, frame materials, etc., and wood-based materials such as wood, plywood, laminated wood, fiber materials, etc. Not only the base material, but also other metal-based materials such as iron and aluminum, synthetic resin molded products such as polyolefin resin, polyester resin, polyvinyl chloride resin, ABS resin and phenol resin, glass, ceramics, cement-based materials. Applied to any base material such as inorganic base material such as wood, for example, casings and parts of various mechanical devices and home electric appliances, tools and farm tools / fishing gear, daily sundries, stationery, play equipment, It goes without saying that it can be used for surface painting of any tangible material such as dry batteries, tableware, packaging containers, and ornaments.

[0027]

EXAMPLE A uniaxially stretched film having a heat shrinkability and a thickness of 25 μm
Base material of polyethylene terephthalate (PET) film
Acrylic release agent (trade name, manufactured by Dainichi Seika Co., Ltd.
TM-MH) by gravure coating method, coating amount 3 g / m
^TwoA two-component curing type acrylic urethane-based resin
Glue fat (manufactured by Dainichiseika Co., Ltd., trade name TM-HGK medium)
Coating amount of 7 g / m by rabia coating method^TwoProvided on the protective layer
Each of them was cured and cured at 40 ° C for 3 days, and then nitric acid
Lurose-based gravure printing ink (trade name, manufactured by Dainichi Seika Co., Ltd.
YHB, OH type) to provide a wood grain pattern layer, and finally
Polyamide hot melt adhesive (Dainichi Seika Co., Ltd. product
Application amount 10 g / m ^TwoAdhesive layer provided on
To form a transfer sheet.

The transfer sheet is wrapped around a base material for a table leg made of laminated wood having a three-dimensional uneven shape on the surface and heated for 1 minute in a heating furnace having an internal temperature of 120 ° C. to heat-shrink the transfer sheet. Shrinks the flexible base sheet and makes it adhere to the surface of the base material for the table leg that is the transfer target, and at the same time bonds the transfer layer to the base material surface using the adhesive force of the adhesive layer that has developed adhesiveness by heat. Let Then, the base material for the table leg portion is taken out from the heating furnace, and after cooling, the heat-shrinkable base material sheet is peeled and removed to complete the transfer, and the three-dimensional uneven surface has a pattern and a protective layer by the transfer. Completed the table legs.

[0029]

As described above, according to the transfer sheet of the present invention and the transfer method using the transfer sheet, the transfer sheet base material is a transfer target base material even for a columnar base material having a three-dimensional uneven shape on the surface. Since it can follow the surface shape of
The transfer sheet is simply wound around the base material and heated without causing a transfer failure or the like, and without requiring special mechanical devices for press-fitting the transfer sheet into the concave portion of the transfer target base material. It has an excellent effect that a molded product to which a desired pattern is transferred can be manufactured with high productivity by a simple operation.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of a transfer sheet of the present invention.

FIG. 2 is a side sectional view showing an embodiment of the transfer method of the present invention in the order of steps.

[Explanation of symbols]

 1 Transfer sheet 2 Heat shrinkable base material sheet 21 Release layer 3 Transfer layer 31 Release layer 32 Protective layer 33 Picture layer 34 Adhesive layer 4 Base material

Claims (4)

[Claims] 1. A transfer sheet comprising a transfer layer on a heat-shrinkable base sheet. 2. The transfer sheet according to claim 1, wherein the transfer layer comprises a protective layer for improving surface properties after transfer. 3. The transfer sheet according to claim 1, wherein the transfer layer comprises an adhesive layer for adhering to a base material of a transfer target. 4. A transfer sheet having a transfer layer on a heat-shrinkable base sheet is wound around a base material of an object to be transferred, and the heat-shrinkable base sheet of the transfer sheet is contracted by heating to form a transfer layer. A transfer method characterized in that the transfer is carried out by contacting the base material.