JPH06198810A - Decorative material, curved surface decorative member and production of them - Google Patents

Abstract

PURPOSE:To obtain a curved surface decorative member having a wooden decorative surface having a high grade feeling, having a painting feeling without applying painting and having surface hardness using veneer and to produce a decorative material for the decorative member. CONSTITUTION:In a decorative material 1 composed of a veneer sheet 4, an ionizing radiation curable resin layer 2 with an elongation of 30% or more is provided on the surface side of the decorative material 1 and a decorative layer 3, the veneer sheet 4, an adhesive layer 5a and a backing sheet 6 are successively provided under the layer 2. The ionizing radiation curable resin layer and the decorative layer are preliminarily transferred and formed to the veneer sheet 4 as transfer foils. The ionizing radiation curable resin layer may be cured before the decorative material is bonded to a curved surface base material but, when it is cured after the decorative material is bonded, the bonding thereof to a curved surface becomes easy to perform and, since the ionizing radiation curable resin layer can be made thick, a painting feeling becomes better.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curved surface decorative member which is inexpensive, has a high-grade appearance, and has a coating feeling and surface hardness, a decorative material composed of a veneer sheet used for its manufacture, and a method for manufacturing them. The curved surface decorative member is a furniture front plate,
For materials such as wood, stone, resin, etc. that have an irregular cross section consisting of irregularities or curved surfaces such as edge material of furniture top plate, skirting board / door frame, system kitchen door margin, window frame, sill, etc.
These include makeup furniture and interior materials for houses.

[0002]

2. Description of the Related Art Conventionally, as a makeup method for a decorative member having an irregular cross section having irregularities or curved surfaces, there is known a method in which a printed polyvinyl chloride resin sheet or the like is attached or painted. ing. Further, the following techniques have been used as a method for finishing the texture of natural wood with a higher-grade feeling and providing a feeling of painting and surface hardness. For example, a method of using solid high-grade natural wood, using it as a member with an irregular cross section by means of an NC router and profile sander, and applying a clear paint finish to see through the base material in order to utilize the material itself. A method in which inexpensive plywood, MDF, or the like is processed as a base material, a transfer sheet having a wood grain print pattern is used as a member having a modified cross section, and wrapping transfer is performed by heat or an adhesive, and then a clear coating finish is performed. A method in which a sliced veneer sheet of high-quality natural wood is lapped (curved surface laminating) on a plywood or MDF substrate with a modified cross-section, and the veneer surface that has been pasted is finished with a clear coating. There is a method in which a veneer decorative material obtained by transferring a decorative layer to an inexpensive veneer sheet is attached to a substrate and then a clear coating finish is applied.

[0003]

As described above, in the conventional method, as a method for inexpensively obtaining a high-quality wooden decorative surface, the method using the tree itself as the base material or the method using the veneer on the surface is used. Came. On the other hand, as a method of providing a surface coated feeling or surface hardness, a method of coating a curved base material itself, or preliminarily providing a clear layer on the surface layer of a decorative material to be attached, or a cosmetic material There was a method such as clear coating after sticking to the base material. However, in the method of simply sticking the resin sheet to the base material, the design feeling is poor,
However, it is expensive to use high-quality natural wood as the base material. Further, if the veneer is pasted and used as an inexpensive material for the base material, the design property is improved, but it is not only expensive to use a high-grade material as a raw material of the veneer, but also stable acquisition is difficult. is there. Furthermore, by using an inexpensive veneer as a material and attaching a decorative material having a semi-transparent decorative layer made of a translucent wood grain pattern on the surface side of the veneer to the substrate, the wood texture can be obtained at a low cost. , The feeling of painting is not enough. Because it is necessary to follow the curved surface when attaching the decorative material consisting of the veneer to the curved surface member, and if the surface clear layer on the surface side of the decorative material is made thick to develop a sufficient coating feeling, This is because the followability is reduced. That is, cracks occur on the surface of the decorative material. For this reason,
There is also a method in which a clear coating is separately applied after applying the decorative material to provide a feeling of painting, but the painting after applying is time-consuming and costly.

Therefore, according to the present invention, a curved surface decorative member which can express a woody design feeling full of high quality even if an inexpensive base material is used and has excellent surface properties such as coating feeling and hardness, and a manufacturing method thereof. It is an object to provide a decorative material using a veneer used and a method for manufacturing them.

[0005]

In order to achieve the above object, the present invention provides a decorative material composed of a veneer, a decorative layer printed with wood grain, an ionizing radiation curable resin layer, etc. Manufactures decorative parts. Therefore, in order to solve the above problems and achieve the object, the decorative material of the present invention is
An ionizing radiation curable resin layer having an elongation of 30% or more, a decorative layer formed on the lower surface of the ionizing radiation curable resin layer, a veneer sheet, an adhesive layer, and a backing layer from the surface side. And the configuration. Further, the curved surface decorative member of the present invention is characterized in that the above decorative material is bonded to a base material having an irregular cross section with an adhesive so that the backing layer side faces each other. Furthermore, the surface of the decorative layer of the decorative material or the curved decorative member on the surface layer side has repaintability. Further, in the method for manufacturing the decorative material or the curved decorative member, a method of forming a decorative layer on the veneer sheet by a transfer method is applied. Further, it is possible to apply a method of forming an ionizing radiation curable resin layer and a decorative layer on a veneer sheet by a transfer method using a transfer foil formed in advance on a base sheet having releasability. Also features. In addition, in the manufacturing method of the curved decorative member,
In the uncured state where the ionizing radiation curable resin layer has been dried to the touch dry degree or more, after applying the decorative material to the substrate having a modified cross section, the ionizing radiation curable resin layer is cured by irradiation with ionizing radiation. It is characterized by that.

The present invention will be described in detail below with reference to the drawings. FIG. 1 is a vertical sectional view of a decorative material showing an embodiment according to the present invention. The decorative material 1 according to the present invention comprises an ionizing radiation-curable resin layer 2 in order from the surface layer side when it is attached to a substrate.
Decorative layer 3 with printed pattern, veneer sheet 4, adhesive layer 5
a, a backing sheet 6.

The veneer sheet 4 is made of wood 0.15 to 0.3.
Although it is sliced to a thickness of about mm, the kind of material is not particularly limited, but it is preferable that it is usually cheap and can be stably obtained in a large amount because it has a whiteness such as rawan, sina, basswood, melapee and mangashiro. Further, in order to facilitate attachment to a curved surface such as an irregular cross-sectional shape, a known softening treatment such as alkali solution treatment or resin impregnation may be performed. By using such an inexpensive veneer, it is possible to express high-quality materials such as oak, chic rose, rosewood, and brown by the synergistic effect with the pattern of the decorative layer. The thickness of the veneer sheet 4 is preferably 0.18 to 0.22 mm. When the veneer sheet 4 is 0.18 mm or less, a finger joint for making the veneer continuous is long, and when it is 0.22 mm or more, it is too hard to be a cosmetic material. Sometimes it is difficult to wrap and cracks in the decorative layer are also likely to occur.

The veneer sheet 4 is laminated with a fibrous backing sheet 6 via an adhesive layer 5a. By being lined, the veneer sheet 4 is reinforced and can be prevented from tearing or cracking during bending, and the rigidity of the veneer is alleviated to increase flexibility as a whole, and the fibrous backing sheet 6 is provided. It is also preferable in terms of improving the adhesiveness with the base material. As the backing sheet 6, a Japanese paper or a polyester or rayon non-woven fabric of about 25 to 100 g / m ² is used. As the adhesive layer 5a for tightly fixing the backing sheet 6 and the veneer sheet 4, an adhesive made of polyvinyl acetate resin, ethylene / vinyl acetate copolymer resin, acrylic resin, polyurethane resin or the like can be used.

FIG. 2 is a longitudinal sectional view showing an embodiment of a curved decorative member 10 obtained by adhering the decorative material 1 to the base material 7 via the adhesive 5b. The base material 7 is a base material having a curved surface with an irregular cross section. The base material 7 is a material made of wood, stone, resin or the like.

In order to stack the decorative layer 3 on the veneer sheet 4, a transfer foil may be separately prepared in advance and transferred to the veneer sheet 4. At that time, the veneer sheet 4
It is preferable to sand the surface of (1) in advance in order to improve the flatness. The decorative layer is formed by transfer in order to improve the quality of the design. That is, it is not impossible to print a decorative layer consisting of a picture or the like directly on the surface of the veneer by offset gravure printing, silk screen printing, etc. Printing on a good base material sheet as a transfer foil and transferring the transfer foil to form a pattern on the veneer is more precise and richer in gradation than direct printing. Layers can be formed. This is because the veneer plate, which is the object to be printed, has rigidity and is inferior in surface smoothness, and is not suitable for direct printing.

FIG. 3 shows a longitudinal sectional view of an embodiment of such a transfer foil. The transfer foil 20 is composed of the decorative layer 3 formed on the base material sheet 8. In FIG. 3, the decorative layer 3 includes a release layer 32, a handle layer 31, and an adhesive layer 5c. However, unlike the transfer foil 20a of another specification shown in FIG. 4, the adhesive layer 5c may not be provided, and like the transfer foil 20b of another specification shown in FIG. The structure may be composed of only the layer 31. Therefore, as the transfer foil 20, at least the base sheet 8 and the handle layer 31 are the minimum, and the release layer 32 and the adhesive layer 5c are provided as necessary.

The base sheet 8 used for the transfer foil 20 may have any releasability to the decorative layer 3 formed on the base sheet, and conventionally known ones can be used. For example, polyester resin such as polyethylene terephthalate and polybutylene terephthalate, polyolefin resin such as polyethylene and polypropylene, nylon 6, nylon 66
A synthetic resin film such as a polyamide resin or the like, paper, or a single or a plurality of laminated bodies such as synthetic paper is used. Furthermore, if necessary, a release layer may be provided on the side in contact with the decorative layer 3. As the release layer, a release agent alone such as a polyolefin resin, a silicone resin, or a fluororesin, or a coating film of a paint obtained by adding these to a known vehicle can be used.

The meaning of the release layer and the release layer here is that the release layer remains on the base material sheet side even after transfer.
It means a layer that facilitates peeling from the decorative layer or the peeling layer. On the other hand, the release layer means a layer which is transferred to the side of the veneer sheet which is a transfer target after transfer. Peeling when there are both a release layer and a release layer is performed between the release layer and the release layer. The peeling layer means a layer such as a primer layer that facilitates coating formation of the ionizing radiation curable resin layer on the decorative layer and improves adhesion with the ionizing radiation curable resin layer. As the release layer 32, when the ionizing radiation curable resin layer 2 is formed on the release layer by coating or the like, it plays a role of a primer layer in the sense of improving the adhesiveness with the ionizing radiation curable resin layer. Also, use a material that has recoatability. Furthermore, since it is necessary to maintain the stretchability when the decorative material 1 is attached to the base material, a resin composition having appropriate flexibility is preferable. Specifically, vinyl chloride-based resin, acrylic resin, cellulose-based resin such as nitrocerol, and the like are preferable.
The release layer or the decorative layer may be formed on the base sheet 8 by a known printing method such as gravure printing, offset gravure printing, silk screen printing, offset printing. The release layer can also be formed by a known coating method.

As the pattern layer 31, an ink composition made of a resin that exhibits appropriate elongation aptitude when the decorative material 1 is attached to the profiled cross-section member is suitable for the releasable base sheet 8. It is created by printing a wood grain pattern by the printing method. As the ink composition, a composition obtained by kneading a vehicle with a pigment or dye colorant, a plasticizer, a stabilizer, other additives, a solvent or a diluent is used. In addition, the ink needs to be transparent in order to take advantage of the natural wood grain design of the veneer sheet. As a vehicle that can be used in such an ink composition,
For example, ethyl cellulose, nitrocellulose, ethyl hydroxyethyl cellulose, cellulose acetate propionate, cellulose acetate butyrate, cellulose derivatives such as cellulose acetate, polystyrene, poly α
Styrene resin such as methyl styrene, styrene copolymer resin, homopolymer or copolymer resin of acrylic acid or methacrylic resin such as polymethylmethacrylate, polyethylmethacrylate, polyethylacrylate, polybutylacrylate, rosin, rosin modification Maleic acid resin, rosin-modified phenol resin, rosin ester resin such as polymerized rosin, polyvinyl chloride, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, vinyl polymer such as polyvinyl butyral, coumarone resin, vinyltoluene resin, polyamide One or more selected from natural or synthetic thermoplastic resins such as resins, polyester resins and polyurethane resins are used. In addition to selecting a resin suitable for elongation of the resin itself used for the vehicle, the elongation rate of the vehicle can be adjusted by a plasticizer. As the plasticizer to be added, esters are often used, especially dibasic acids, higher fatty acids, aromatic acids, phosphoric acid and other esters,
Esters of glycerin, which is a polyhydric alcohol, are often used.

If the pattern layer is heated when the decorative material 1 is applied to the base material 7, the resin is easily stretched, and the selection range of the pattern layer ink is expanded accordingly. Therefore, when the decorative material 1 is applied at room temperature, among the above-mentioned vehicle resins, polyvinyl chloride, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, urethane resin, etc. have a high degree of freedom in resin design. It is also suitable because of the elongation suitability of the resin itself. Further, as the plasticizer, dibutyl phthalate, tricresyl phosphate, dioctyl phthalate and the like are particularly suitable. If the cosmetic layer is heated during the sticking process, the above-mentioned resins can be used as the vehicle as well as the above-mentioned resins, and castor oil, epoxy-soybean oil, etc. can be used as the plasticizer, and the range of use can be expanded. To be

The adhesive layer 5c is integrally formed on the transfer foil 20 as a layer in the decorative layer 3 and transferred onto the veneer sheet 4 at the same time as a pattern layer or the like, or not on the transfer foil but on the veneer sheet. Preformed on the 4 side. In the method of forming the adhesive layer 5c on the transfer foil in advance, the adhesive layer 5c can be transferred onto the surface of the porous veneer sheet 4 favorably, and the decorative material 1 can be attached to the modified cross-section member. A heat-sensitive adhesive having the property of having a good elongation suitability when used can be used. As the heat-sensitive adhesive, a thermoplastic resin, an ionomer or the like is usually used, and it is a cellulose derivative, a styrene resin or a styrene copolymer, an acrylic resin, a vinyl resin, a rosin ester resin, a rubber resin, etc. The ink composition or the hot melt resin composition may be applied by an appropriate method. Since the veneer sheet 4 is made of wood and is therefore a porous body, it is, for example, a condensate of dimer acid and ethylenediamine and has a melting point of 150 to 170 ° C. and 180 to 23.
A 0 ° C condensate and the like are preferred. The coating amount is preferably 25 to 40 g / m ² when dried. Coating amount is 25g / m
^If it is less than ² , sufficient adhesiveness cannot be obtained when the transfer sheet is heat-bonded to the veneer, and if it exceeds 40 g / m ² , the drying property of the coating film is poor and blocking occurs when wound. Volatile solvent remains as bubbles during coating film drying,
Adhesiveness, smoothness, and aesthetics are impaired. Specific examples of the condensate include nylon 6, nylon 66, nylon 610,
There are nylon 612, nylon 11, nylon 12, copolymer nylon, nylon MDX, nylon 46, etc.
A bar salon type polyamide is particularly preferable.

In the method in which the adhesive layer 5c is formed on the veneer sheet 4 side in advance instead of on the transfer foil, an adhesive is applied to the veneer sheet 4 to form the adhesive layer 5c, and then the adhesive layer 5c is formed. No transfer foil, for example transfer foil 2 with the configuration of FIG. 4 or FIG.
After adhering 0a or 20b, the base material sheet 8 may be peeled off and the decorative layer 3 may be transferred. In this case, as the adhesive that can be used for the adhesive layer 5c, a vinyl acetate emulsion adhesive or the like, an acrylic adhesive, a vinylidene chloride adhesive, a polyvinyl acetal adhesive, a polyvinyl chloride adhesive, or an ethylene copolymer is used. An adhesive made of a thermoplastic resin such as an adhesive or a rubber-based adhesive is good from the viewpoint of elongation suitability, and preferably a vinyl acetate-based adhesive or the like from the viewpoint of elongation suitability at the time of sticking. On the other hand, in the case of a thermosetting adhesive, when the decorative material 1 after transfer is attached to the base material 7 having an irregular cross section, appropriate elongation suitability is required. Since the required physical properties cannot be obtained, it is necessary to use a resin that is in a semi-cured state and can be obtained in a solidified state sufficient to firmly fix the pattern layer and the veneer layer to each other. Therefore, as the thermosetting adhesive, polyurethane adhesives, thermosetting acrylic resin adhesives and the like can be used as long as they satisfy the above conditions. As a coating method, a roll coating, a gravure coating, a reverse coating or the like may be used to apply the coating to the veneer sheet side or the transfer foil side. In addition, a primer layer may be applied to the pattern surface of the transfer foil in order to improve the close contact with the pattern layer 31. In FIG. 3, for the sake of explanation, the adhesive layer 5c is one element that constitutes the decorative layer 3 on the transfer foil, but after the adhesive 5c is formed on the surface of the veneer sheet in advance, for example, the transfer foil 20a of FIG. Since the same makeup material is obtained as a result even when the material is transferred to a makeup material, the method of forming the makeup material does not matter, and therefore, the contents are not particularly specified in FIG. 1 and the like, but the makeup layer 3 in FIG. It may be included in or as a component thereof.

As the ionizing radiation curable resin layer 2, a resin having a good elongation property can be used. The method of use is roughly classified into two types depending on the method of formation. The first method is to pre-form it on a transfer foil and transfer it to a veneer sheet. FIG. 6 shows a hard coat transfer foil 2 used in such a method.
An example of No. 1 will be shown. In FIG. 6, there is no release layer 32,
In the structure of the transfer foil, the peeling layer 32 and the adhesive layer 5c are
The method of use and the provision thereof according to need are the same even when the ionizing radiation curable resin layer 2 is present. The second method is a transfer foil without the ionizing radiation curable resin layer 2,
For example, after the transfer foil as shown in FIGS. 3, 4 and 5 is transferred to the veneer sheet and before it is attached to the base material 7, the ionizing radiation curable resin layer 2 is used.
Is applied to a veneer sheet to form it. Also,
The timing of curing the ionizing radiation curable resin layer 2 can be roughly classified into two types. The first method is
This is a method in which the ionizing radiation curable resin layer 2 is cured before being attached to the base material of the decorative material. This is a precure specification. This method is roughly classified into two methods when the ionizing radiation curable resin layer 2 is formed on the transfer foil. That is, it is a method of curing before and after transfer to the projecting plate. Next, the second method is a method of curing the ionizing radiation curable resin layer 2 after sticking the decorative material to the base material. This is an after cure specification.

The resin used for the ionizing radiation curable resin layer 2 is roughly classified into the above-mentioned pre-cure specification or after-cure specification. The reason for this is that the elongation rate is usually lowered when it is cured, and therefore the resin for pre-cure specifications needs to be a resin that can develop the required elongation rate even after curing. Examples of the resin satisfying the above physical properties include urethane acrylate resin. Further, specifically, there are resins made of polyester urethane acrylate, polyether urethane acrylate, and the like. FIG. 7 is a diagram for explaining the decorative layer 3 in more detail to show an example of the decorative material obtained by the method described above.

The adhesive layer 5b is formed by attaching the decorative material 1 to a base material having a modified cross section to form a curved decorative member.
Examples of materials that can be used for this include hot-melt adhesives and the like, and include ethylene-vinyl acetate copolymer and the like.

According to the decorative material comprising the ionizing radiation-curable resin layer as described above, the physical properties of the ionizing radiation-curable resin layer are easily extended when it is attached to a substrate having a convex portion or a curved surface portion. Since it has, it can be extended following a curved surface. Then, the occurrence of cracks on the surface of the decorative material can be prevented, and by using an ionizing radiation curable resin for the surface layer, it is possible to make the surface hardness excellent and to prevent scratches and the like.

[0018]

[Example] The veneer sheet is a Chinese veneer 0.22.
200 mm thick sheets joined with finger joints
m long continuous veneer sheet was used. Then, using a roll coater, apply a vinyl chloride vinyl chloride adhesive to the back surface of the veneer sheet.
After 50 g / m ^{2 was} applied and the water content was substantially dried, 50 g / m ² rayon non-woven fabric was laminated and cured at 40 ° C. for 2 days. After this, sanding is used to polish the surface.
An intermediate material was obtained by bonding the veneer sheet and the backing sheet with an adhesive. On the other hand, as a transfer foil, a polyester film (X-42 manufactured by Toray Industries, Inc.) was used as a base material sheet, and a vinyl chloride-based release layer and a pattern layer of nitrified cotton alkyd ink were gravure-printed on this. Formed. 150 g / m ^{2 of} an acrylic emulsion adhesive was applied to an intermediate material composed of the veneer veneer, and after substantially drying, the transfer foil was pressed and cured for one day, and the base sheet of the transfer foil was peeled off. Next, 10 g / m ^{2 of} an ionizing radiation curable resin of a urethane acrylate resin (manufactured by Dainichiseika) was applied to this, and the ultraviolet irradiation was 80 W / cm, 5 m / m.
It was carried out under the condition of 1 pass for min to obtain a cosmetic material. Further, an acrylic emulsion-based adhesive was applied to the backing sheet side of the above-obtained decorative material, and was wrapped and adhered to an MDF bar material having a modified cross section to obtain a curved decorative member.

[0019]

Since the present invention is constructed as described above, it has the following effects. The decorative material of the present invention, along the irregular surface of the irregular cross-sectional member consisting of an uneven surface and a curved surface, in adhering a decorative material including a veneer sheet on which the ionizing radiation curable resin layer and the decorative layer are laminated on the surface, Since the ionizing radiation curable resin layer has a physical property of an elongation percentage of 30% or more, no crack is generated when the surface of the decorative material is stretched. Therefore, a curved decorative member obtained from such a decorative material can have a design property and physical properties such as a coating feeling and a surface hardness, even with respect to a base material having a curved surface that has been conventionally realized only by post-coating. I can do something. Further, in the method of curing the ionizing radiation-curable resin layer after the decorative material is attached to the substrate having a curved surface, the ionizing radiation-curable resin can also be applied to a substrate having a curved surface having a larger curvature. Even if the layer is thicker, it is possible to realize a deeper coating feeling. As a result, it is possible to express a highly-designed wood texture without using any inexpensive veneer sheet.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a decorative material.

FIG. 2 is a vertical sectional view showing an example of a curved surface decorative member.

FIG. 3 is a vertical sectional view showing an example of a transfer foil.

FIG. 4 is a longitudinal sectional view showing another embodiment of the transfer foil.

FIG. 5 is a longitudinal sectional view showing another embodiment of the transfer foil.

FIG. 6 is a longitudinal sectional view showing an example of a hard coat transfer foil.

FIG. 7 is a vertical sectional view showing another embodiment of the decorative material.

[Explanation of symbols]

 1, 1a Decorative material 2 Ionizing radiation curable resin layer 3 Decorative layer 4 Veneer sheet 5a, 5b, 5c Adhesive layer 6 Backing sheet 7 Base material 8 Base material sheet 10 Curved surface decorative member 20, 20a, 20b Transfer foil 21 Hard coat Transfer foil 31 Pattern layer 32 Release layer

Claims (6)

[Claims] 1. An ionizing radiation curable resin layer having an elongation of 30% or more from the surface side, and a decorative layer formed below the ionizing radiation curable resin layer, and then a veneer sheet, an adhesive layer, and a backing layer. A cosmetic material characterized by comprising. 2. A curved decorative member, wherein the decorative material according to claim 1 is bonded to a base material having an irregular cross section with an adhesive so that the backing layer side faces each other. 3. The decorative material or curved decorative member according to claim 1, wherein the surface of the decorative layer on the surface side has repaintability. 4. The method for manufacturing a decorative material or a curved decorative member according to claim 1, wherein the decorative layer is formed on the veneer sheet by a transfer method. 5. An ionizing radiation curable resin layer and a decorative layer,
The decorative material or curved decorative member according to any one of claims 1 to 3, characterized in that the transfer foil is previously formed on a base sheet having releasability and the transfer foil is formed on the veneer sheet by a transfer method. Manufacturing method. 6. A method of curing an ionizing radiation-curable resin layer by irradiating it with ionizing radiation after applying a decorative material to a substrate having a modified cross-section in a state where the ionizing radiation-curable resin layer is not completely cured. The method for manufacturing a curved surface decorative member according to claim 2, wherein the curved surface decorative member is manufactured.