JPH0379185B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a decorative natural wood decorative sheet and a decorative natural wood board made by pasting the decorative sheet, and more specifically to interior materials such as wall materials, ceiling materials, door materials, etc. of buildings and residences. The present invention also relates to decorative sheets and decorative boards that can be used as decorative surface materials for furniture, cabinets, musical instruments, electrical appliances, etc. (Prior art) In recent years, decorative laminates based on plywood have been widely used as wall and ceiling materials for buildings and homes, and decorative sheets have also been used as surface decorative materials for furniture, cabinets, etc. ing. By the way, when renovating this type of decorative wall surface or decorative ceiling, a method is adopted in which the decorative board is peeled off from the wall surface and a new decorative board is pasted anew. However, with this method, the vinyl board base material often cracks and tears during peeling and remains on the wall material, etc., and it is necessary to remove this remaining base material, making the renovation work troublesome. In addition, since the method involves replacing the entire decorative board, it has various disadvantages such as high renovation costs and being uneconomical. Therefore, as a simple and economical renovation method, a method of directly pasting a thin decorative plastic sheet or decorative wallpaper onto the surface of the decorative board in use (or the surface of the decorative board from which the surface layer of decorative veneer has been removed) has traditionally been carried out. It is. However, with this method, not only does the grain characteristic of precious woods such as cypress and zelkova not appear on the surface of the interior material, but it also tends to cause twisting, shrinkage, and curling after pasting.
It was difficult to adhere a large area without unevenness. Furthermore, decorative sheets used as surface materials for furniture or cabinets also have the problem of poor dimensional stability and warping when pasted. On the other hand, decorative boards are also available in which a decorative sheet is attached to plywood such as plywood, but in this case, the dimensional stability of the decorative sheet is not good.
The decorative sheet expands and contracts due to the moisture absorption of the plywood, leading to problems such as poor quality of the decorative sheet. (Problems to be Solved by the Invention) As described above, the present invention solves the poor dimensional stability that is sometimes found in conventional decorative sheets, and the decorative sheet and the decorative board to which the sheet is attached can absorb moisture or dry out. The purpose is to prevent "flares" from occurring, thereby preventing warping of the decorative sheet itself, and ensuring the flatness of the surface. Therefore, an object of the present invention is to provide a decorative sheet that can be easily and economically refurbished and has a good finish.It is also bendable and highly workable, and can be used for interior decoration of curved parts and curved surfaces. The purpose of the present invention is to provide decorative sheets useful for materials such as wood. Furthermore, the present invention also provides a decorative board in which the decorative sheet is adhered to a base material such as plywood. (Means for Solving the Problems) The present inventor has conducted studies to solve the above-mentioned problems and provide a decorative sheet with good quality, and has particularly focused on using aluminum or iron as a type of base material for decorative sheets. The present inventors have newly discovered that dimensional stability can be ensured by incorporating metal foil, and that good adhesion can be obtained by heat-sealing this metal foil with a polyethylene layer or polypropylene layer, and have completed the present invention. It is. That is, the decorative sheet of the present invention includes, as a laminate, paper or nonwoven fabric such as Japanese paper, kraft paper, tissue paper, and impregnated processed paper; a polyethylene layer or a polypropylene layer; a metal foil such as aluminum or iron; a polyethylene layer or a polypropylene layer; Paper such as kraft paper, thin paper, impregnated processed paper, or non-woven fabric; on the surface of the laminate, a precious wood veneer is further laminated via a room-temperature curing, thermosetting, or thermoplastic resin adhesive. ; Heat pressing the laminate of the precious wood veneer-the laminate;
or by hot pressing and cold pressing; Furthermore, the present inventor has focused on the fact that a decorative board in which a base material such as plywood is attached to the above-mentioned decorative sheet is suitable as an interior material for a building or a house, and has provided such a decorative board. Decorative board is a laminate made of paper or non-woven fabric such as Japanese paper, kraft paper, tissue paper, impregnated paper; polyethylene layer or polypropylene layer; metal foil such as aluminum or iron; polyethylene layer or polypropylene layer; Japanese paper, kraft paper, tissue paper. , paper such as impregnated paper, or non-woven fabric; Further, a precious wood veneer is laminated via a room-temperature curable, thermosetting, or thermoplastic resin adhesive on the surface of the laminate; plate - on the underside of the laminate, the laminate;
A base material such as plywood is attached using a cold-curing, thermosetting, or thermoplastic resin adhesive. It is characterized by being formed by hot pressing and cold pressing. (Function) That is, in the case of the decorative sheet and decorative board of the present invention, in particular, a metal foil such as aluminum or iron is used as the base material of the decorative sheet, and a polyethylene layer or a polypropylene layer is used to bond the metal foil. As a result, it has appropriate rigidity and flexibility, and is dimensionally stable and bendable. Furthermore, this is a decorative board to which such a dimensionally stable decorative sheet is attached, and the quality does not deteriorate even if left for a long period of time. (Example) The decorative sheet and decorative board of the present invention will be explained in more detail below based on the drawings. FIG. 1 shows a sectional view of the decorative sheet of the present invention. That is, the decorative sheet 1 of the present invention is
A laminate of a precious wood veneer 2, an adhesive 3, and a base material 4 is subjected to a pressing process as described below. In this case, the precious wood veneer 2 is made of various kinds of precious woods, such as Japanese cypress, oak, zelkova, cherry tree, elm, etc., or imported materials such as teak, rosewood, walnut, mahogany, zebra wood, etc., with a thickness of 0.15 to 0.60 mm. It is a thinly cut plate. Adhesive 3 is a room-temperature curing, thermosetting or thermoplastic adhesive, and is formulated to prevent the adhesive itself from seeping out from the surface of the single piece during the pressing process for pasting decorative veneers. It's good to have. for example,
These include vinyl acetate resin, latex, urea resin, and aqueous vinyl urethane resins, and specific examples include water-soluble melamine resins and styrene-butadiene resins. As shown in FIG. 1, the base material 4 includes paper or nonwoven fabric 5 such as Japanese paper, kraft paper, tissue paper, and impregnated paper, a polyethylene or polypropylene layer 6, a metal foil 7 such as aluminum or iron, a polyethylene or polypropylene layer 8, and Paper or nonwoven fabric such as Japanese paper, kraft paper, thin paper, impregnated paper, etc.9
It has a multilayer laminated structure consisting of, and each layer forming the laminated structure has its own characteristic properties. That is, Japanese paper constituting the laminated structure of the base material 4,
The paper or non-woven fabric 5 such as kraft paper, tissue paper, impregnated paper, etc. hides the shine of the metal foil 7 such as aluminum or iron from appearing on the surface of the precious wood veneer 2 through the polyethylene or polypropylene layer 6, as will be described later. It is laminated to facilitate adhesion between the precious wood veneer 2 and the polyethylene layer or polypropylene layer 6 in the adhesion process. In this case, the paper or nonwoven fabric 5 has a basis weight of 10 to 150 g/m ² ,
Preferably it is about 20-50 g/ ^m2 . The polyethylene layer or polypropylene layer 6 is
Paper or nonwoven fabric 5 and metal foil 7 are laminated to form a laminate coating (adhesion). The thickness of the polyethylene layer or polypropylene layer in this case is 7 to 150μ, preferably about 20μ
~40μ is good. The metal foil 7 made of aluminum, iron, etc. has constant expansion and contraction due to the strong rigidity of Al, Fe, etc. Therefore, by laminating the metal foil 7, the movement of the precious wood veneer 2 due to drying or moisture absorption is stopped, and this helps to prevent the surface of the sheet 1 from cracking or from fraying, and also prevents warping when the sheet 1 is attached to plywood. This is to prevent the occurrence of Furthermore, since the metal foil 7 restricts the diffusion of moisture, it contributes to improving the waterproof and moisture-proof properties of the decorative sheet 1. From this, the metal foil 7 has a thickness of 7 to 100μ,
Preferably it is about 15-20μ. Further, by providing the polyethylene layer or polypropylene layer 8 and providing a plurality of polyethylene layers or polypropylene layers in the base material 4, the decorative sheet 1 can be given appropriate flexibility, and the alkaline content is Decorative sheet 1 from the back of the material
This prevents it from penetrating into the body. This is particularly effective, for example, when the wall material to which the decorative sheet is attached is made of an alkaline material such as mortar. Note that this polyethylene layer or polypropylene layer 8 is used to improve the adhesion between the metal foil 7 and the paper or nonwoven fabric 9 in the same manner as the above-mentioned polyethylene layer or polypropylene layer 6, and the thickness of the layer is The same level will also be adopted. In addition, paper such as Japanese paper, kraft paper, thin paper, impregnated paper, etc., or nonwoven fabric 9 laminated on the lower surface of the base material 4 is used to increase the adhesive strength between the decorative sheet 1 and the material attached below, such as plywood or wall material. In order to improve
Its basis weight is 10-150g/ ^m2 , preferably 20-60g/m2
g/ ^m2 . Next, the decorative board of the present invention will be explained. FIG. 2 shows a sectional view of a decorative board 10 to which the decorative sheet 1 of the present invention is attached. That is, the decorative board 10 of the present invention is made by attaching a base material 12 such as plywood to the above-described decorative sheet 1 through an adhesive 11.
This is a layered product which has been subjected to the pressing process described below. Each laminate of the decorative sheet 1 in this case has already been described above, and a base material 12 such as plywood is further laminated on this sheet 1 via an adhesive 11. The adhesive 11 is a vinyl acetate resin-based, latex-based, urea resin-based, or water-based vinyl urethane resin-based adhesive, and is preferably a room temperature-curable, thermosetting, or thermoplastic synthetic resin adhesive, such as a water-soluble melamine resin, Examples include styrene-butadiene resin. Next, as the base material 12 such as plywood, plywood such as veneer, wood such as fiberboard, particle board, paper, plastic such as synthetic resin board, synthetic resin foam, light calcium board, gypsum board, etc. Ceramics,
Metals such as aluminum and iron or composite plates thereof can be used. The thickness of the base material such as plywood can be varied depending on the intended use of the decorative board 10 of the present invention. Next, the method for manufacturing the decorative sheet 1 of the present invention and the decorative board 10 to which the decorative sheet 1 is attached will be described. That is, in the method for manufacturing the decorative sheet 1 of the present invention, for example, the decorative sheet 1 is composed of a precious wood veneer 2, an adhesive 3, and paper or a nonwoven fabric 5, and a polyethylene layer or a polypropylene layer 6, a metal foil 7, and a polyethylene layer or a polypropylene layer. 8 and paper or non-woven fabric 9; alternatively, the paper or non-woven fabric 5, the polyethylene layer or polypropylene layer 6, the metal foil 7, the polyethylene layer or polypropylene layer 8, and the paper or non-woven fabric 9 are layered with an adhesive. It is manufactured by stacking the precious wood veneers 2 through the laminates 3 and pressing the laminate together. The pressing conditions in this case are, for example, when the adhesive 3 is a thermosetting resin, the laminate is heat-pressed to harden the adhesive 3 and compress the laminate into a thin layer. However, it is preferable to carry out the process under the conditions of, for example, a temperature of about 100° C., a pressure of about 7 Kg/cm ² , and a time of about 90 seconds. Further, when the adhesive 3 is a thermoplastic resin, the laminate is bonded by hot compression and then cold pressed to compress the laminate into a thin layer. In this case, the conditions for heat compaction are, for example, a temperature of approximately 115℃,
After performing the test under the conditions of a pressure of 7Kg/cm ² and a time of 120 seconds,
Cold compaction is performed at the same pressure of 7 kg/cm ² by cooling to room temperature. On the other hand, in the method of manufacturing the decorative laminate 10 of the present invention, for example, a laminate (6,
7, 8, 9, 11 and 12) are superimposed;
Or a laminate of paper or non-woven fabric of 5 or less (5,
6, 7, 8, 9, 11 and 12) with the adhesive 3 interposed thereon, or the decorative sheet 1 is overlaid on the base material 12 such as plywood with the adhesive 11 interposed, and the It is manufactured by pressing the same way as decorative sheets. The clamping conditions in this case are also
Although the conditions differ depending on the type of adhesive 3 used, the same conditions as in the case of the decorative sheet described above are adopted. Specific production examples of decorative sheets and decorative boards are described below, but the present invention is not limited thereto. Production Example Decorative sheet, decorative board with decorative sheet attached According to the laminated structure of the decorative sheet and decorative board shown in FIGS. 1 and 2, the following materials were used for each layer. Precious wood veneer 2: birch 0.22mm thick and oak 0.28mm thick
2 types of thickness Adhesive 3: Styrene-butadiene thermosetting adhesive Paper 5: Japanese paper (machine made) basis weight 28 g/ ^m2 Polyethylene 6: 40μ thick polyethylene Metal foil 7: 15μ thick aluminum foil Polyethylene 8: 30 μ thick polyethylene paper 9: Pure white roll paper, basis weight 30 g/m ² Adhesive 11: Styrene-butadiene thermosetting adhesive Base 12: 4 mm thick ordinary plywood First, paper 5/polyethylene 6/ A laminate of metal foil 7/polyethylene 8/paper 9 is laminated by melt extrusion. Next, adhesive 3 was applied onto the melt-extruded laminate, and the adhesive 3 was applied at 100°C x 7Kg/cm ² x
Decorative sheet 1 was manufactured by bonding precious wood veneer 2 under heat pressing conditions for 90 seconds. Adhesive 11 is applied onto the substrate 12 to obtain a decorative board.
, apply the decorative sheet 1 obtained above, and apply 100
Adhesion was carried out under heat pressing conditions of ℃ x 7 kg/cm ² x 90 seconds. Incidentally, the surface of the obtained decorative wood veneer was polished and painted with polyurethane resin paint. The decorative board obtained as described above was subjected to a crack resistance test. As objects, we used a precious wood veneer cut from almost the same area and plywood taken from an adjacent location.
A decorative board (hereinafter referred to as blank), which is a precious wood veneer-plywood bonded with the adhesive 11 under heat-pressing conditions of 105° C. x 7 kg/cm ² x 90 seconds, was used. The test method was in accordance with JAS (Japanese Agricultural and Forestry Standards) cold and heat cycling B test method for natural wood decorative plywood. That is, two pieces of the decorative board and blank obtained in the above production example of the present invention were each made into a square shape of 150 mm on a side, and placed in a thermostatic oven at 80±3°C.
One cycle of standing for a period of time and then standing for 2 hours in a thermostat at -20°C±3°C was repeated four times, and the occurrence of cracks in each decorative board was observed. As a method of counting the number of cracks, vertical and horizontal 15
Draw lines vertically and horizontally like a checkerboard at 1 cm intervals within a cm square to create 15 x 15 = 225 1 cm square squares.
The number of cracks in each square was counted and expressed as a total number. The cracks within each square are counted as 1 for cracks that fall within one square, and as 1 for cracks that extend to other squares. The results obtained are shown in the table below.

[Table] As is clear from the above results, it was confirmed that the decorative board of the present invention had a laminated structure in which paper-gold paper foil was incorporated, and that no cracks were generated. (Effects of the Invention) The decorative sheets and decorative laminates of the present invention manufactured as described above have particularly good dimensional stability of the entire sheet due to the paper-metal foil being incorporated in the laminated structure as described above. Even if adhesive is applied to the back of the sheet, it is possible to suppress the sheet's elongation, and the sheet's elongation due to moisture absorption and desorption of the precious wood veneer on the front surface can be suppressed over time. When applying the adhesive, flatness can be ensured even if there are areas with poor adhesion. In addition, the movement of the precious wood veneer is suppressed by incorporating the metal foil, and surface cracks do not occur. Furthermore, by reducing the thickness of the paper on the back side of the sheet, polyethylene or polypropylene can be soaked into the entire paper, thereby preventing the paper from peeling off. In addition, the decorative sheet of the present invention is extremely thin and has appropriate flexibility due to the pressing treatment of the laminated structure, and can be applied directly onto the surface of the interior material during use or It can be easily pasted onto the interior material from which the surface material has been peeled off, and the interior material can be easily renovated. It also has a moderate amount of rigidity, so even if there are some unevenness on the adhesive surface,
It can be applied flatly over a wide area, and it is not easily affected by moisture and has excellent dimensional stability.There is no twisting or shrinkage during application, almost no curling, and the finish is extremely good. becomes. In addition, the decorative sheet of the present invention has appropriate flexibility and can be bent, and has curved parts and curved parts.
For example, it is also possible to attach it to a cylindrical object. Also,
It can be cut with a knife and can be easily cut into any shape. As described above, the decorative sheet of the present invention has excellent processability and can be used as a surface decorative material for furniture, cabinets, etc., decorative small boxes, etc. moreover,
It also takes into consideration the blocking of alkaline components and has excellent alkali resistance. Therefore, even the decorative board of the present invention, in which such a decorative sheet is adhered to a base material such as plywood, is an excellent building material that fully exhibits the above-mentioned properties of the sheet.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the decorative sheet of the present invention,
FIG. 2 is a sectional view of the decorative board. 1... Decorative sheet, 2... Precious wood veneer, 3,11
... Adhesive, 4 ... Base material, 5, 9 ... Paper or nonwoven fabric, 6, 8 ... Polyethylene layer or polypropylene layer, 7 ... Metal foil, 10 ... Decorative board, 12
...Base material such as plywood.

Claims (1)

[Scope of Claims] 1. As a laminate: Paper or nonwoven fabric such as Japanese paper, kraft paper, thin paper, impregnated processed paper; Polyethylene layer or polypropylene layer; Metal foil such as aluminum or iron; Polyethylene layer or polypropylene layer; Japanese paper, kraft Paper or non-woven fabric such as paper, thin paper, impregnated processed paper; Further, a precious wood veneer is further laminated via a room temperature curing, thermosetting, or thermoplastic resin adhesive on the surface of the laminate formed by laminating paper, tissue paper, impregnated paper, etc. or nonwoven fabric; The precious wood veneer--the laminate is heat pressed,
Or a decorative sheet made of natural precious wood, which is formed by hot pressing and cold pressing. 2 As a laminate, paper or non-woven fabric such as Japanese paper, kraft paper, tissue paper, impregnated paper; polyethylene layer or polypropylene layer; metal foil such as aluminum or iron; polyethylene layer or polypropylene layer; Japanese paper, kraft paper, thin paper, impregnated paper On the surface of the laminate formed by laminating paper such as paper or non-woven fabric, a precious wood veneer is further laminated via a room temperature curable, thermosetting, or thermoplastic resin adhesive; the precious wood veneer - the above. On the bottom surface of the laminate,
A base material such as plywood is attached using a cold-curing, thermosetting, or thermoplastic resin adhesive. A decorative natural wood board characterized by being made by hot pressing and cold pressing.