JPH054908B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a decorative board and a method for manufacturing the same. More specifically, it describes a method of manufacturing a decorative board with a white wood look, for example, a decorative board similar to a white wood look natural wood, which has a relatively high-class feel, using a relatively inexpensive wood base material such as lauan plywood, and how The present invention relates to the obtained decorative board, which can be used for furniture, building interiors, doors, automobile interiors, musical instruments, etc. (Prior art) A technology similar to natural wood (e.g. oak), which is different from the wood board (e.g. lauan plywood) made of this material by providing an ink layer on the surface of a wood base material such as lauan plywood, is well known. There is. In this case, the ink layer consists of three layers, and these three layers are sequentially from the surface side of the wooden base material: a base print layer printed with a base plate, a tone print layer printed with a tone plate, and a conduit print layer printed with a conduit plate. Consists of. The base printing layer is usually solid over the entire surface and has a color tone that corresponds to the target natural wood base. The tone printing layer has a darker color than the base printing layer and is printed with wood grain shading, and the base printing layer can be seen through the areas where the density is light or where it is not printed at all. The conduit printing layer is a layer in which only the conduit is printed with a darker ink. In addition to printing directly on the wood base material, methods for printing these printed layers include printing these printed layers on a release sheet and then attaching them using an adhesive or the like. There is a method of transferring the above to a wood base material, but the above three printed layers are the same in all cases. By the way, natural wood has a unique texture, depth, and wood texture, so in order to obtain a decorative board that is even closer to natural wood, it is necessary to reproduce this texture, depth, and texture. For this reason, instead of printing the entire surface of the base printing layer, there is a method of printing with partial gaps so that the wood base material can be seen through the gaps. Since the base material that can be seen through the gap is a wood base material such as lauan plywood, the texture, depth, and wood texture are retained. (Problem to be Solved by the Invention) If the base printing layer is provided with a hollow part in this way so that the wooden base material can be seen through, the part to be seen through is made of cheap wood such as lauan plywood, so it is relatively The color becomes dark and it is not possible to obtain a decorative board similar to white wood. Therefore, the present invention utilizes an inexpensive wood base material,
To provide a method for manufacturing white wood having a texture, depth, and wood texture, and to provide a decorative board obtained in this way. (Means for Solving the Problems) In order to achieve this object, the present invention first aims to provide a solution to the surface of a wooden base material, through an adhesive layer, which has a partial gap in the grain direction of the wooden base material. white ink layer,
To provide a decorative board in which a base printing layer with partial gaps (b), a tone printing layer (c), and a conduit printing layer (d) are formed in this order. In addition, as a method for manufacturing this decorative board, the present invention provides a transfer layer having a transfer layer formed by forming the above a to d in reverse order (c, b, a sequentially from d) on a releasable sheet. A method is provided in which a sheet is laminated and adhered to a wooden base material via an adhesive layer, and then the releasable sheet is peeled off and removed. In addition, as in the examples described later, various processes are applied to the wood base material while the transfer sheet and the wood base material are adhered, that is, without peeling and removing the release sheet, and then the release sheet is applied. It can be peeled off or a paint can be applied to the surface of the decorative board obtained. (Function) The four printed layers a to d according to the present invention all have voids. Therefore, the c-tone printing layer and the d-conduit printing layer are the same as those of the conventional decorative board, although the four printing layers differ depending on whether or not they overlap with each other. Therefore, in areas where both the white ink layer (a) and the base printing layer (b) are not present, the wood base material can be seen through.
The texture, depth, and texture of the wood base material are preserved. The areas where a white ink layer is present and b where the base printing layer is not present are white, producing the texture of white wood. Note that when the white ink layer is printed with an inflection plate, the wood base material can be seen through in areas where the white ink is thin in density. (b) This color can be seen through the area where the base printing layer is present, creating a pattern similar to natural wood. The printing area, shape, etc. of each printing layer are determined by the type of natural wood targeted, but as a result of the above, a decorative board that closely resembles white wood, which is between white and wood base materials, can be obtained as a whole. Moreover, the original sense of texture, depth,
It has a wood texture. (Description of Examples) The present invention will be described below with reference to the drawings. The drawings show embodiments of the present invention, with FIG. 1 being an explanatory cross-sectional view of a transfer sheet, and FIG. 2 being an explanatory cross-sectional view during processing. In FIG. 1, the transfer sheet is roughly divided into two layers: a release sheet 1 serving as a base, and a transfer layer 2 that is transferred to a wood base material 3. The transfer layer 2 consists of a white ink layer a, a base printing layer b, a tone printing layer c, and a conduit printing layer d.
A protective layer e is provided between the release sheet 1 and the conduit printing layer d in order to adjust the peel strength of the transfer layer 2 and to protect the surface after producing the decorative board (after removing the release sheet).
It is also possible to provide This transfer sheet is coated with an adhesive 4 on a wooden base material 3.
Laminated and bonded through. Adhesive 4 is wood base material 3
It may be applied on top or on the surface of the transfer layer 2 of the transfer sheet. In addition, in order to strengthen the adhesive force between the adhesive 4 and the transfer layer 2, or the solvent in the adhesive 4 is applied to the surface of the transfer layer 2, each of the printed layers a to
An adhesion auxiliary layer f (not shown) may be provided in advance to prevent the adhesive from penetrating into the adhesive layer d and deforming the image. This adhesion auxiliary layer f is, of course, provided on the white ink layer a. This wooden base material 3 can be processed in a state where the transfer sheet and the wooden base material 3 are bonded together. Figure 2 shows an example of this process. From the opposite side of the transfer sheet, the wooden base material 3 is removed, leaving only the transfer sheet.
A method is shown in which the wood substrate 3 is processed into a V-cut, the wooden base material 3 is bent from the V-cut part x, and the wood base material 3 is fixed in this state with an adhesive or the like. It is desirable to carry out the V-cut process after the adhesive 4 has completely cured. It has the advantage of being easy to process. The releasable sheet 1 of the transfer sheet is peeled off after this processing. The decorative board of the invention is thus obtained, after which a paint can be applied to its surface. Wooden Material 3 Although any material can be used as the wood base material 3, it is preferable to use an inexpensive material such as lauan plywood. When applying the adhesive 4 to the surface of the wooden base material 3, if the adhesive 4 easily permeates into the wooden base material 3, the surface of the wooden base material 3 should be pretreated with a sealer treatment or the like. I can do it. Release Sheet 1 As the release sheet 1, one that can be easily separated from the transfer layer 2 is used. For example, polyester, polypropylene, polyethylene, polyamide, polyamideimide, polycarbonate,
Synthetic resin sheets such as polyvinyl chloride, cellulose acetate, nylon, vinylon, etc., and weight 20
A sheet with a release layer formed by coating or adhering polypropylene, polyethylene, polyester, ethylene-vinyl acetate copolymer, etc. to paper of about 80 g/m ² or the like can be used. Further, paper coated with urethane, aminoalkyd, silicone, polyamide, etc. may also be used. When performing the above-mentioned V-cut processing, it is necessary that the release sheet does not peel off carelessly during processing, so the peel strength between the transfer layer 2 and the release sheet 1 is set at 50 to 500 g when peeled at 180 degrees. /25mm. The means for controlling this peel strength will be described later. Protective layer e The protective layer e is provided for the two purposes of controlling the peeling strength of the release sheet 1 and the transfer layer 2, and protecting the surface after manufacturing the decorative board. , release sheet 1
Provided as necessary at a position in contact with the As the protective layer e, a two-component curing type urethane resin, acrylic resin, etc. mixed with additives can be used. In order to set the peel strength between the release sheet 1 and this protective layer e to 50 to 500 g/25 mm, the surface of the release sheet 1 is coated with a mixture of 70 to 75% by weight polypropylene and 30 to 25% by weight polyethylene. year,
For the protective layer e, a mixture of acrylic resin or urethane resin and chlorinated polypropylene or chlorinated polypropylene-acrylic copolymer as an additive may be used. Conduit printed layer d and tone printed layer c The conduit printed layer d and tone printed layer c may be printed in the same manner as before, but like the other printed layers a and b,
It is desirable to print with an ink containing vinyl chloride-vinyl acetate copolymer as a binder. Base Print Layer b The base print layer b is printed in the same manner as before, except that it is printed so that it has some unprinted portions (blanks). The holes are formed along the grain direction of the wooden base material 3. White Ink Layer a The white ink layer a is preferably printed with white ink, but a color close to this may be used. Printing is done using a tone plate with gaps, that is, a plate with shading made from the target natural wood as a manuscript, with gaps created in it. Although the holes are partially formed along the grain direction of the wood base material 3, they do not need to coincide with the holes in the base printing layer b. Adhesion auxiliary layer f The adhesion auxiliary layer f is used to improve the adhesion between the transfer layer 2 and the adhesive 4, and to prevent the solvent in the adhesive 4 from forming on the transfer layer 2.
In order to prevent deformation of each printed layer a to d,
Established as necessary. In order to prevent the printed layers a to d from being dissolved by the solvent in the adhesive 4, it is preferable to use a two-component curing resin, and when this is used, it is bonded to the wooden base material 3 after being completely cured. Ru. Adhesive 4 The adhesive 4 that does not require a temperature higher than room temperature by 10 degrees or more can be used for adhesion or curing. For example, unsaturated polyester resin, epoxy resin,
Curable adhesives such as urethane resins, vinyl acetate resins, ethylene-vinyl acetate copolymer resins, acrylic-vinyl acetate copolymer resins, etc. can be used. It is desirable that the volume change is small during solidification or curing, that volatile components such as solvents are dissipated in a relatively short period of time, and that the adhesive has adhesive strength even when the volatile components are dissipated. Adhesive 4 can be applied using a roll coater, reverse coater, flow coater, curtain coater, air knife coater, gravure coater,
It can be applied to the wooden base material 3 or the transfer sheet using a method such as a spray coater. Paint Here, the paint refers to the paint that is applied after manufacturing the decorative board of the present invention.
It is applied to the surface of the transfer layer 2 to protect its surface. Examples of such paints include urethane resins, acrylic resins, aminoalkyd resins, and lacquer paints. (Test Example) A mixed resin consisting of 75% polypropylene resin and 25% polyethylene resin was coated to a thickness of 20μ on a smooth paper weighing 60g/m ² using an extruder method to obtain a release sheet. Next, a protective layer was formed by applying a resin prepared by adding chlorinated polypropylene to acrylic urethane resin to a thickness of 3 μm, and then a conduit printing layer d was sequentially applied with each color ink using vinyl chloride-vinyl acetate copolymer as a binder. , a tone printing layer c, a base printing layer b with gaps, and a white ink layer a were printed. It should be noted that these printing layers d to a are all printed using a plate prepared using an oak wood grain pattern as an original. On the other hand, apply 100 g/m ² of ethylene-vinyl acetate copolymer adhesive to the surface of 9 mm thick lauan plywood.
After coating with a (wet) roll coater and dissipating the volatile components, the white ink layer A side of the transfer sheet was overlapped and laminated under pressure while it still had adhesive strength. After the adhesive was dried and hardened, the plywood was V-cutted from the opposite side of the transfer sheet, bent and fixed, and then only the release sheet was peeled off. The obtained decorative board was further coated with 7 g/m ² (wet) of urethane paint using a flow coater and dried. The obtained decorative board had a plain wood appearance as a whole, and had a texture, depth, and wood texture, and was very similar to natural oak wood. (Effects of the Invention) As described above, according to the present invention, a decorative board that is made of any wood base material, has a plain wood appearance as a whole, has a texture, depth, and wood texture, and closely resembles natural wood. can be obtained.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, with FIG. 1 being an explanatory cross-sectional view of a transfer sheet, and FIG. 2 being an explanatory cross-sectional view during processing. 1... Release sheet, 2... Transfer layer, 3... Wooden base material, 4... Adhesive, a... White ink layer,
b... Base printing layer, c... Tone printing layer, d... Conduit printing layer, e... Protective layer.

Claims (1)

[Scope of Claims] 1. On the surface of the wooden base material, via an adhesive layer, a white ink layer with partial gaps in the grain direction of the wooden base material, b a base printing layer with partial gaps in the direction of the grain of the wooden base material. , C tone printing layer, and D conduit printing layer are formed in this order. 2. On the release sheet, in this order: d: conduit printing layer, c: tone printing layer, d: base printing layer with partial gaps, a: white ink layer with partial gaps in the direction of the wood grain of the wood base material. A method for producing a decorative laminate, which comprises stacking and adhering a transfer sheet having a transfer layer formed thereon on a wood base material via an adhesive layer, and then peeling and removing the release sheet.