JPH11198279A - Grain decorative sheet and board coated with fluoroplastic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a product being a grain decorative sheet and board wherein the surface of veneer is coated with a fluoroplastic film, having a grain surface near to or corresponding to a conventional wood surface due to oil finish, and the feel near to the feel of an oil finish surface of natural wood can be obtained. SOLUTION: A grain decorative sheet 1 coated with fluoroplastic is obtained by integrally lamainating a fluoroplastic film 2 composed of fluoroplastic (e.g. PVDF) with an m.p. of 220 deg.C or lower and subjected to matte processing to the veneer surface of a veneer laminated sheet 4 (veneer laminated board) through an adhesive material 3. The adhesive material 3 to be used is selected from a modified polyolefin resin adhesive, a urethane resin adhesive, a urethane modified acrylic resin adhesive, a urethane modified vinyl resin adhesive and an acryl modified resin adhesive.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel wood decorative sheet and a wood decorative board coated with a fluorine resin. The sheets and boards may be applied without particular limitation over a wide range of applications described below. : Architectural interior materials, such as wall materials, ceiling surface materials, pillar covering materials, and movable partitions, etc .: Surface materials for automobile and marine interior products: Exterior cosmetics for furniture such as wardrobes: Exterior cosmetics for general wood products such as furniture Ingredients: and exterior decorative materials for electronic devices and musical instruments.

[0002]

2. Description of the Related Art Oil finish has been known and used as one of techniques for coating wood products. This coating method is often applied particularly to furniture made in Scandinavian countries such as those made in Denmark. The oil finish is a coating method in which a paint (oil) is applied, that is, penetrates into the structure of wood, and is different from a general coating method in which a coating film is formed on the surface of wood. Oil finish can protect the surface of wood without losing the tactile sensation of the skin, and is a soothing painting method that fully demonstrates the richness of wood, that is, the rich elegance of natural wood. . In addition,
As a paint for oil finish, conventionally, an oil or the like mainly containing linseed oil and blended with a synthetic resin / rubber, a desiccant and the like has been used. On the other hand, in the fields of surface decorative materials and interior materials, a synthetic resin film, typically a vinyl chloride resin film, is applied on a veneer sheet or board to protect the surface of the product and maintain its aesthetic effect. Conventionally, a method of coating the surface has been adopted.

[0003]

However, despite the fact that the surface of the veneer is originally formed with various irregularities of large and small densities, the synthetic resin-coated wood grain sheet and wood grain made according to the above-mentioned conventional method. Many decorative boards have a substantially flat surface and can provide only the same touch as a normal synthetic resin sheet. Even more, a grain-decorated sheet or board whose surface has the same texture and grain as the finished surface of the oil finish described above,
Heretofore, it has not been practically used and is not commercially available. Further, as far as the present inventor knows, attempts to provide a surface finish comparable to that obtained by oil-finishing the surface of wood with a conventional method for a wood decorative sheet and a wood decorative board have heretofore been made. No proposal has been made on such an attempt, and no proposal has been reported yet in published patent publications.

[0004] Fluororesin films have the property of having a very high heat-resistant temperature, and have been advantageous as a backing material for wood-grain decorative sheets. It has not been used at all. However, recently the price of fluororesin films has become cheaper than before, and there has been a move to develop new wood-based decorative materials using fluororesin films as an element of wood-grain decorative sheets. Recently seen. For example, Japanese Patent Application Laid-Open No. 9-136385 discloses a decorative veneer sheet for wrapping in which a resin film of an ethylene-tetrafluoroethylene copolymer is coated and bonded on a veneer of a laminated veneer / nonwoven fabric sheet. However, in order to prevent swelling, contamination, and cracks during wrapping, fluffing, etc., of the veneer sheet, the technology described in this publication is used to laminate the veneer sheet of the veneer sheet with a fluororesin film as described above. It seems that other ideas and ideas are not described in the above publication. And, needless to say, a wood grain decorative sheet or board surface-coated with a fluororesin,
An improved product having the same texture and grain as the finished surface of the oil finish has not been proposed or suggested in conventional patent publications or the like, including the above publications.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and the problem is that the surface thereof is formed with fine irregularities, large and small, and has a surface texture comparable to that of a conventional finished surface with an oil finish. Have grain, and therefore
It is an object of the present invention to provide a fluororesin-coated wood decorative sheet and a wood decorative board capable of obtaining a touch closer to the surface of an oil-finished natural wood. The present inventor has now surprisingly selected, among fluororesin films, a matte-processed film made of a fluororesin having a melting point of 220 ° C. or lower, for example, a poly (vinylidene fluoride) resin (PVDF) film. The veneer-bonded sheet or board is laminated and integrated with a suitable adhesive material on the veneer surface of the veneer-bonded sheet or board, so that the surface of the obtained wood-grain decorative sheet and wood-grain decorative board can be changed to a conventional finished surface by oil finish. It has been found that the surface becomes comparable in texture and grain, and a tactile sensation close to that of the surface of the oil-finished natural wood can be obtained. Furthermore, the present inventor further studied based on this finding, and found that as the adhesive material of the specific fluororesin film and the veneer-bonded sheet described above, modified polyolefin resin-based adhesive, urethane resin-based adhesive, urethane When a modified acrylic resin-based adhesive, a urethane-modified vinyl resin-based adhesive, or an acrylic-modified resin-based adhesive is used, the obtained wood decorative sheet and wood decorative board have only a strong adhesive force with the fluororesin film. Instead, it has been found newly that the surface has a texture similar to or very close to the oil-finished surface of a natural wood, and thus the tactile sensation gives a feeling very similar to the oil-finished surface, Here, the present invention has been completed.

[0006]

More specifically, the first invention of the present invention relates to a fluorine-containing resin film formed by laminating and integrating a fluororesin film on the veneer surface of a veneer-laminated sheet via an adhesive material. A resin-coated wood grain decorative sheet, wherein the fluororesin film is a matte fluororesin film made of a fluororesin having a melting point of 220 ° C. or lower, and the adhesive material is a modified polyolefin resin-based adhesive. And a urethane resin-based adhesive, a urethane-modified acrylic resin-based adhesive, a urethane-modified vinyl resin-based adhesive, and an acrylic-modified resin-based adhesive. Also,
A second invention of the present invention is a fluororesin-coated wood grain decorative board made by laminating and integrating a fluororesin film on a veneer surface of a veneer-laminated board with an adhesive material interposed therebetween, The resin film has a melting point of 220
A matte-processed fluororesin film made of a fluororesin at a temperature of not more than ° C, and the adhesive material is a modified polyolefin resin-based adhesive, a urethane resin-based adhesive, a urethane-modified acrylic resin-based adhesive, or a urethane-modified vinyl resin. The present invention relates to a wood-grain decorative board, which is selected from the group consisting of a system adhesive and an acrylic-modified resin-based adhesive. In addition, the wood decorative board of the present invention is obtained by coating the wood decorative sheet coated with the fluororesin of the present invention finished as a product with a liquid adhesive or an adhesive film on a board used for a veneer board. Fluororesin-coated wood decorative boards produced by bonding and pressing on top are also included.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The laminated elements of the grain decorative sheet and the grain decorative board of the present invention will be described below in order.

-Fluororesin Film- In the present invention, the fluororesin film is coated on the veneer surface of the veneer-attached sheet or board to form a surface layer of the wood decorative sheet or board. In general, examples of the fluororesin film include films made of the following fluororesins. 4-fluorinated: polytetrafluoroethylene resin (PT
FE), tetrafluoroethylene-fluoroalkylvinyl ether copolymer resin (PFA), tetrafluoroethylene-hexafluoropropylene copolymer resin (FE
P), tetrafluoroethylene-ethylene copolymer resin (ETFE) 3-fluorinated: polychlorotrifluoroethylene resin (PCTFE), chlorotrifluoroethylene-ethylene copolymerized resin (ECTFE) 2-fluorinated: poly ( Vinylidene fluoride) resin (PVDF, vinylidene fluoride resin) 1-fluorinated: Poly (vinyl fluoride) resin (PV
F, polyvinyl fluoride resin) However, among the above-mentioned fluororesin films, those which can be applied to the present invention are made of a fluororesin having a melting point of 220 ° C. or lower, that is, a film mainly composed of such a fluororesin. And matte finish (ie matte finish)
It is limited to the fluororesin film that has been used. For example, PC
Matte processed film such as TFE, PVDF, PVF. Fluororesins are one resin material that is generally characterized by high heat resistance, but these fluororesin films tend to have relatively lower melting points and, therefore, lower softening points, so they can be used for wood decorative sheets or In the stage of hot pressing under conditions commonly used when manufacturing a board, the above-mentioned fluororesin film softens and flows moderately, and deeply along the concave shape on the surface of the veneer, for example, in a concave portion of a pipe. Can invade. Further, in order to obtain a feeling of touch close to that of the finished surface by the conventional oil finish, it is necessary that the fluororesin film used is not a smooth resin film but a matte resin film. The matting process in this case is not particularly limited, and may be a process of physically forming fine irregularities on the surface of the fluororesin film, or a process of mixing a matting agent inside the fluororesin film. . As the former processing method, a method in which the fluororesin film is brought into contact with a matting solvent to erode the surface, a method in which the fluororesin film is passed between heat rolls in which minute irregularities are formed,
And a sand blast method etc. are mentioned. In addition, the degree of matting of the fluororesin film is appropriately determined depending on the type of veneer used, the use of the decorative wood sheet (board), the required quality, and the like. Thus, when the above matte-processed low melting point fluororesin film is adopted,
The resulting grained decorative sheet and board have an uneven surface that faithfully reflects the veneer grain / grain, i.e., the surface has a grain and grain that is comparable to a conventional oil-finished surface. Therefore, a feel similar to that of the oil-finished wood surface can be obtained. And from the viewpoint of this effect, PVDF is particularly preferable. Further, the thickness of the fluororesin film used in the present invention is not particularly limited, but from the viewpoint of providing a surface finish of an oil finish, a fluororesin film having a thickness of 10 μm to 40 μm may be appropriately adopted. it can.

-Veneered Sheet-The veneered sheet used in the present invention is obtained by backing a veneer with paper, nonwoven fabric, or the like, and any conventionally used one can be used in the present invention. The backing material corrects unevenness (unevenness) such as the wall surface on which the veneer-attached sheet (wooden decorative sheet) is attached, and forms a flush surface on the attached sheet.
It is used advantageously. As the backing material, paper,
A fibrous sheet such as a nonwoven fabric, a polyolefin film, for example, a polyethylene film, a synthetic resin film such as a polypropylene film, and a combination thereof, and a combination of a fibrous sheet and a metal foil, a combination of a synthetic resin film and a metal foil, and Examples include a combination of a fibrous sheet, a synthetic resin film, and a metal foil. Examples of the fibrous sheet include materials conventionally used as a backing material for veneer, such as Japanese paper, Western paper (for example, high quality paper, medium quality paper, etc.), kraft paper, tissue paper, or resin-impregnated paper (latex resin-impregnated paper or phenol). Resin impregnated paper), and polypropylene nonwoven fabric, vinylon / pulp nonwoven fabric,
All fibrous sheets such as various nonwoven fabrics such as rayon / pulp nonwoven fabric and polyester / pulp nonwoven fabric can be applied. As the synthetic resin film, a resin film material conventionally used as a backing material of a veneer, for example, polyvinyl chloride resin: polyolefin such as polyethylene, polypropylene, cyclic polyolefin: polyvinylidene chloride: polycarbonate: acrylic resin, etc. All the synthetic resin films can be applied. Examples of suitable metal foils include aluminum foil, iron foil, stainless steel foil, copper foil, silver foil, and the like. Aluminum foil, copper foil, stainless steel foil, and the like are more preferred, and aluminum foil is most preferred, from the viewpoint of easy processing and less corrosion. Generally 0.0 for metal foil
Having a thickness of 1 to 2.0 mm, more preferably a thickness of 0.05 to 0.50 mm, especially about 0.30
Those having a thickness of about mm are often used. Also,
As the adhesive for the backing, for example, a vinyl acetate adhesive, for example, an ethylene vinyl acetate resin (EVA) adhesive, a vinyl acetate-acrylic copolymer adhesive: styrene-
Butadiene latex-based adhesive: aqueous polymer isocyanate-based adhesive: urethane-based adhesive, for example, modified urethane-based adhesive, urethane-modified vinyl-based adhesive: and an adhesive such as an acrylic-based adhesive. The above-mentioned veneer-laminated sheet may have a configuration in which a veneer, an adhesive layer, paper or nonwoven fabric, a polyolefin film, and paper or nonwoven fabric are laminated in this order from the uppermost layer, and compression-molded.
In addition, in this laminated structure, instead of or in addition to the polyolefin film, a veneer-attached sheet having a configuration in which a metal foil is laminated as a backing material,
May be used. In addition, the veneered sheet is usually
It has a general basis weight of 60 g / m ² to 500 g / m ² as a whole (ie, approximately 0.02 mm to 0.5 g / m ² ).
With a thickness of 70 mm).

-Veneered board-The veneered board used in the present invention is formed by using a suitable adhesive, usually the same adhesive as that used for backing with a veneered sheet, to make the veneer a smooth substrate. And a decorative plate generally used in the past. The substrate is mainly made of a thick base material such as the following plywood, but between the thick base material of such a main material and the veneer on the upper side thereof, paper,
A fibrous sheet such as a nonwoven fabric, a synthetic resin film such as a polyolefin film, or a combination thereof, and
The laminate may have a multilayer structure in which a combination of a fibrous sheet / synthetic resin film and a metal foil is appropriately inserted. Typically used substrates include plywood, especially Rawan plywood, fiberboard such as hard fiberboard (hardboard), especially medium density fiberboard (MDF), and inorganic boards such as calcium silicate board, asbestos slate, asbestos cement perlite. Examples include plates and gypsum boards, fiber reinforced gypsum plates, and metal plates such as aluminum plates, copper plates, steel plates and the like. In addition, volcanic glassy composite plates (for example, Dylite,
Non-combustible base material such as phenolic resin foam board mixed with glass fiber, or composite base material obtained by laminating and bonding an aluminum plate and a plywood or MDF to be used as a board for a veneer bonded board. Can be. For mutual bonding between the substrate or each element of the substrate and the veneer-backed sheet, an adhesive used for bonding the veneer of the veneer-backed sheet and its backing material can be used. Examples of the adhesive include a vinyl acetate adhesive, for example, an ethylene vinyl acetate resin (EVA) adhesive, a vinyl acetate-acryl copolymer adhesive: a styrene-butadiene latex adhesive: an aqueous polymer isocyanate adhesive: Urethane-based adhesives, for example, modified urethane-based adhesives, urethane-modified vinyl-based adhesives, and acrylic pressure-sensitive adhesives.

-Veneer-The veneer used for the veneer-laminated sheet and the veneer-laminated board is made to have a constant thickness, for example, 0.04 mm to 0.60 mm, preferably from various precious woods.
It is a veneer cut to a thickness of 0.10 to 0.40 mm. The veneer may be a so-called thin veneer or a so-called thick veneer. The grain of the veneer is not particularly limited, and may be any of a straight grain, an additional straight grain, a board grain, or a knot. The wood species of the veneer is not particularly limited, but examples of preferred wood species are as follows. : Cypress, oak, zelkova, cherry, yu,
Domestic materials such as black persimmon, Tochigi, Katsura, Maple, Sophora, Kusunoki, Yellowfin, Shioji, Taboki, Akadamo, Makore, Tamo, Sen, Mizunara and teak, Rosewood, Mahogany,
Birdseye maple, walnut, zebra wood,
Kokutan (Black Dan), Abodeira, Rosewood (Red Sandalwood), Manga Shiro, Satin Wood, Dao, Brazilian Rose, Andean Rose, Wonder Wood, Brazilian Core, African Rose, Eurasian Antique, White Tagaya, Bangzel Rose, Amazon Rose, Tamakura, Persimmon , Royal Pine, Ranchan Rose, Siam Persimmon, Bubinga, Olive Walnut, Iris Rose, Claro Walnut, Silver Rose, Indian Heart American Black Walnut, Latino Walnut, Queensland Walnut, Zebrawood, Karin (Pear), Palma, Redwood , Purple wood, cherry, silky oak, Thai wanks, magnolia, black leo (dao), white leo, saveli, bubinka, macolle, madrona, Rutoru, maple, Asshin, imported materials, such as Inbuiya.

-Adhesive Material- In the present invention, the adhesive material for adhering the fluororesin film and the veneer-bonded sheet or board is not only excellent in adhesiveness to the fluororesin but also has a temperature during hot pressing Any form may be used as long as it has the property of softening and melting, and the form is not particularly limited, and it may be an adhesive film, a layer of a hot-melt adhesive, or a layer of a liquid adhesive. Therefore, in the present invention, the above-mentioned adhesive material is applied in the following various usage forms. 1) A hot-melt adhesive pre-coated on one side of a fluororesin film by melt extrusion is used as a raw material, and in a pressing process, the coated body is thermocompression-bonded to a veneered sheet or board. 2) A laminate obtained by laminating a fluororesin film and an adhesive film in advance by thermal lamination is used as a raw material, and this laminate is thermocompression-bonded to a veneered sheet or board in a pressing process. 3) A laminate obtained by laminating a fluororesin film, an adhesive film and a veneer-bonded sheet in advance by thermal lamination is used as a raw material, and is used as it is in the pressing process. 4) An acrylic or urethane liquid adhesive is applied on the veneer-bonded sheet or board, a fluororesin film is further laminated thereon, and the laminated body is used in the subsequent pressing process. Further, as the adhesive material, an adhesive film mainly composed of the following adhesive component or a liquid adhesive can be more conveniently used. That is, the adhesive material more preferably used in the present invention is a modified polyolefin resin-based adhesive, a urethane resin-based adhesive, a urethane-modified acrylic resin-based adhesive, a urethane-modified vinyl resin-based adhesive, or an acrylic-modified resin-based adhesive. Consists of an adhesive. When the adhesive used does not have the property of softening and melting appropriately at the temperature of hot pressing, the fluororesin tries to get into the recess on the surface of the veneer plate by receiving the pressing force from the buffer resin film during hot pressing. However, since the adhesive used is not sufficiently softened and melted, the fluororesin cannot penetrate deeply into the concave portion on the surface of the veneer along the concave shape. The form is substantially filled with the adhesive, and the resulting wood decorative sheet or board often has a smooth surface. On the contrary, the adhesive used is a modified polyolefin resin-based adhesive, a urethane resin-based adhesive, a urethane-modified acrylic resin-based adhesive,
When a urethane-modified vinyl resin-based adhesive or an acrylic-modified resin-based adhesive is used, the adhesive is appropriately softened and flows, and the fluororesin can penetrate deeply into the concave portion on the surface of the veneer along the concave shape, Thus, a faithful embossment is formed on the surface of the grain decorative sheet or board. That is, the modified polyolefin resin-based adhesive, urethane resin-based adhesive, urethane-modified acrylic resin-based adhesive, urethane-modified vinyl resin-based adhesive or acrylic-modified resin-based adhesive material is specifically used in the present invention. Not only has a strong adhesive force with the fluororesin film, but the wood decorative sheet or board obtained using it is
It has an uneven surface that is very close to the oil-finished surface of a natural wood, so that a very similar feel can be given to the oil-finished surface.

[0013]-Process for producing a decorative wood sheet and a decorative wood board The wood decorative sheet of the present invention is manufactured by the following process. First, a laminated body having a laminated structure of, for example, a fluororesin film / adhesive material / a veneer sheet is prepared. As the laminated body, a laminated body in which the whole or a part thereof is previously laminated and integrated by melt extrusion or heat lamination is usually used. Next, the stacked body is inserted between two metal mirror plates in a cold hot flat press, and a synthetic resin film for buffering is inserted between the fluororesin film of the stacked body and the metal mirror plate, Then, the above-mentioned press machine is used to soften and melt the synthetic resin film (for example, at 125 ° C., 3 to 9 kg / c).
hot press at m ² (usually 6 kg / cm ² , 10 minutes) and then cold press at the same pressure, that is, forced cooling to room temperature without releasing the pressurizing pressure, Thereafter, the obtained laminate is taken out from the press, and the synthetic resin film is peeled from the laminate. The grain decorative board of the present invention is manufactured by the following process. First, a laminated body having a laminated structure of, for example, a fluororesin film / adhesive material / veneer board is prepared. This stacked body, such as by melt extrusion or heat lamination,
In some cases, a part thereof is laminated and integrated in advance. Next, in some cases, as an immediately preceding preparation, an adhesive is applied to the board of the veneer board or an adhesive film is placed on the board, and the prepared laminate is cold-hot-plated. Inserted into a press machine, then put one metal mirror plate on it, further insert a synthetic resin film for buffer between the fluororesin film and the metal mirror plate, and then In the press machine, according to the same conditions and procedures as described above, hot-pressing, and then cold-pressing with the same pressure, after that, the obtained laminate is taken out from the press, and a synthetic resin film is obtained from the laminate. Is peeled off. Needless to say, the above-mentioned conditions of the heat-pressing are dependent on the type and thickness of the material to be used, and should be taken into consideration so that the most appropriate one is selected. For example, when the fluororesin film is PVDF, since the melting point is lower, a temperature of 125 ° C. is sufficient for the hot pressing. If the difference in heat shrinkage between the fluororesin film and the buffering synthetic resin film is too large, the wood-grain decorative sheet (board) made after the pressing process
Care must be taken because wrinkles may be formed on the surface of the. Furthermore, when the fluororesin-coated wood decorative sheet of the present invention is attached to a smooth substrate and pressed to produce a wood-finished decorative board, the board used for the veneer-attached board, such as plywood or fiberboard Can be applied as the substrate. An aqueous polymer isocyanate-based or vinyl acetate-based adhesive can be used as the adhesive for sticking. In the pressing step, hot pressing under relatively low temperature and pressure conditions is sufficient.

[0014]

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

Embodiment 1 As shown in FIG. 1, a grain decorative sheet 1 of the present embodiment is a grain decorative sheet in which a surface of a veneer is coated with a fluororesin film 2 and is made of an adhesive material (during hot pressing). Adhesive component that melts)
The fluororesin film 2 is laminated and integrated on the surface of the veneer-attached sheet 4 with the intermediary of a 3. The veneer-attached sheet 4 is a sheet obtained by laminating and bonding a veneer 5 to a backing material 7 with an adhesive 6. What is characteristic is that, in the grain decorative sheet 1, a matte-processed fluororesin film 2 having a melting point of 220 ° C. or lower is used as a surface layer. The method of manufacturing the grain decorative sheet 1 is as follows. First,
The adhesive 6 is applied on the backing material 7, and then the veneer 5 is adhered thereon, and this is applied to, for example, 105 ° C. × 120 seconds ×
The veneer-attached sheet 4 is obtained by thermocompression bonding under the condition of 7 kg / cm ² . Thereafter, as a preparation for the next step, the veneer surface of the veneered sheet 4 is polished. Next, as shown in FIG. 3, the fluororesin film 2 / adhesive material 3
/ Laminated body 11 having laminated structure of veneer sheet 4
Is made in the following procedure. When the adhesive material 3 is an adhesive film, the adhesive film 3 is overlaid on the veneer surface of the veneer sheet 4 and the fluororesin film 2 is overlaid on the adhesive film 3 to form a laminated body 11 (form 1a). When the adhesive material 3 is a hot melt adhesive,
One in which the hot melt adhesive 3 is coated in advance on one side of the fluororesin film 2 by melt extrusion is superimposed on the surface of the veneer sheet 4 to form a superimposed body 11 (form 1b). When the adhesive material 3 is a liquid adhesive, the liquid adhesive 3 is applied to the surface of the veneer of the veneer sheet 4, and subsequently,
After the solvent is volatilized, the fluororesin film 2 is superposed thereon to form a superimposed body 11 (form 1c). After that, it is softened and melted by hot pressing.
And a synthetic resin film 12 which does not adhere to the fluororesin film 2 of the superimposed body 11, is inserted between the two metal mirror plates 13, 13, and then is inserted in a hot cold flat press. The hot-pressing is performed between the hot plates 14, 14, and then the cold-pressing is performed at the same pressure. That is, the thermal compression is performed, for example, at 125 ° C. × 6 kg / cm ² × 10
Minutes, and the cold-pressing is performed under the same pressure-maintaining condition by a procedure of forcibly cooling to room temperature without releasing the pressing force. However, at the time of hot pressing, air may be removed several times in order to escape the residual solvent, moisture, and the like. Through this pressing process, the laminate 15 shown in FIG. 4 is produced. Thereafter, by removing the synthetic resin film 12 of the surface layer from the laminate 15, a dense uneven surface very close to the oil-finished surface of the natural wood is formed, and the feel is very similar to the oil-finished surface. Is obtained.

Embodiment 2 As shown in FIG. 2, the grain decorative board 10 of the present embodiment is a grain decorative board in which the surface of the veneer is covered with a fluororesin film 2, and is made of an adhesive material (during hot pressing). The fluororesin film 2 is laminated and adhered to the surface of the veneer-attached board 8 via an adhesive component 3 that melts. The veneer board 8 is a board in which the veneer 5 is covered and adhered to a base material 9 with an adhesive 6. What is characteristic is that, in this grain decorative board 10, a matte-processed fluororesin film 2 having a melting point of 220 ° C. or lower is used as a surface layer. The method of producing the grain decorative board 10 is as follows. First, the adhesive 6 is applied on the base material 9, then the veneer 5 is adhered thereon, and this is applied, for example, at 105 ° C. × 120 seconds ×
The veneer-attached board 8 is obtained by thermocompression bonding under the condition of 7 kg / cm ² . Thereafter, as a preparation for the next step, the surface of the veneer board 8 is polished. Next, as shown in FIG. 5, the fluororesin film 2 / adhesive material 3
/ Laminated body 16 having a laminated structure of veneer board 8
Is made in the following procedure. When the adhesive material 3 is an adhesive film, the adhesive film 3 is overlaid on the veneer surface of the veneer bonding board 8, and the fluororesin film 2 is further overlaid on the adhesive film 3 to form a laminated body 16 (form). 2a). When the adhesive material 3 is a hot melt adhesive,
A hot melt adhesive 3 previously coated on one side of the fluororesin film 2 by melt extrusion is superimposed on the surface of the veneer board 8 to form a superimposed body 16 (form 2b). When the adhesive material 3 is a liquid adhesive, the liquid adhesive 3 is applied to the surface of the veneer of the veneer bonding board 8, and subsequently,
After the solvent is volatilized, the fluororesin film 2 is overlaid thereon to form a stacked body 16 (form 2c). After that, it is softened and melted by hot pressing.
The synthetic resin film 12 which does not adhere to the plastic resin film 2 of the laminated body 16 is laminated on the fluororesin film 2, and one metal mirror plate 13 is placed on the synthetic resin film 12. Hot plate at 14,1
Hot-press between 4 and then cold-press at the same pressure.
That is, the thermal compression is performed, for example, at 125 ° C. × 6 kg / cm ^2.
The cold pressing is performed under the condition that the same pressure is maintained by the procedure of forcibly cooling to room temperature without releasing the pressing force. However, at the time of hot pressing, air may be removed several times in order to escape the residual solvent, moisture, and the like. Through this pressing process, the laminate 17 shown in FIG. 6 is produced. After that, by removing the synthetic resin film 12 of the surface layer from the laminate 17, a dense uneven surface very close to the oil-finished surface of the natural wood is formed, and the feel is very similar to the oil-finished surface. Thus, a wood decorative board 10 coated with fluorine resin is obtained.

[0017]

EXAMPLES Next, according to the procedure described in the first or second embodiment, the grain decorative sheet and the grain decorative board of each example were manufactured by applying the following elements and conditions, respectively. These examples are merely non-limiting examples, and do not depart from the spirit and spirit of the present invention.
It goes without saying that all the modified or applied embodiments of the embodiments are also included in the scope of the present invention.

Example 1 Fluororesin coated wood decorative sheet (Embodiment 1a)-Materials used-Fluororesin film: poly (vinylidene fluoride)
Matted resin film made of resin (PVDF) (thickness: 30 μm) On the film surface, countless minute irregularities are formed and physically matted. Adhesive material: Adhesive film thickness of modified polyolefin resin adhesive 50 μm Veneer-plated sheet: Veneer: 0.22 mm thick veneer veneer Adhesive: Vinyl acetate-based adhesive Backing material: Vinylon mixed paper (basis weight 38 g) / M ² ) Synthetic resin film: low-density polyethylene (LDPE) film, thickness 100 μm-Conditions of pressing treatment-Hot pressing: 125 ° C × 6 kg / cm ² × 10 minutes Cold pressing: 6 kg / cm ² Force cooling to room temperature -Evaluation- The resulting grained decorative sheet has a dense uneven surface close to the oil-finished wood surface, giving a texture similar to that of the finished surface of the oil finish. Was something.

Example 2 Fluororesin coated wood decorative board (Embodiment 2a)-Materials used-Fluororesin film: poly (vinylidene fluoride)
Matting resin film made of resin (PVDF) (thickness: 30 μm) Inside the film, a matting agent is internally added. Adhesive material: Adhesive film thickness of modified polyolefin resin adhesive 50 μm Thick veneer board: Veneer: 0.22 mm thick oak veneer Adhesive: Water-based polymer isocyanate-based adhesive Base material: Medium density fiberboard MDF) synthetic resin film: low density polyethylene (LDPE) film, a thickness of 100 [mu] m - pressing process conditions - hot ^{press: 125 ℃ × 6kg / cm 2} × 10 min cold pressing: at 6 kg / cm ² at room temperature -Evaluation- The obtained wood-grain decorative board has a fine uneven surface close to the surface of the wood that has been oil-finished, giving a feeling similar to that of the finished surface of the oil finish. there were.

Example 3 Fluororesin-coated wood grain decorative sheet (Embodiment 1b)-Materials used-Fluororesin film: poly (vinylidene fluoride)
Matte resin film made of resin (PVDF) (thickness: 30 μm, surface has a physical matte finish) However, one side of the fluororesin film is melt-extruded and then bonded to the next Material is pre-coated. Adhesive material: Adhesive film made of modified polyolefin resin adhesive 50 μm thick Veneer sheet: Veneer: 0.22 mm thick veneer veneer Adhesive: Vinyl acetate adhesive Backing material: Vinylon mixed paper (basis weight 38 g) / M ² ) Synthetic resin film: Polyvinyl chloride (PVC) film, thickness 100 μm-Conditions for pressing treatment-Hot pressing: 125 ° C × 6 kg / cm ² × 10 minutes Cold pressing: 6 kg / cm ² Force cooling to room temperature -Evaluation- The resulting grained decorative sheet has a dense uneven surface close to the oil-finished wood surface, giving a texture similar to that of the finished surface of the oil finish. Was something.

Example 4 Fluororesin-coated wood decorative sheet (Embodiment 1c)-Materials used-Fluororesin film: poly (vinylidene fluoride)
Matted resin film made of resin (PVDF) (thickness: 30 μm, surface has a physical matte finish) Adhesive material: Urethane-modified acrylic resin adhesive Application amount (solid content conversion) 15 g / m ² Following application of this liquid adhesive to a veneer-attached sheet (described below), a solvent in the adhesive is volatilized, and a so-called dry lamination process in which a fluororesin film is attached is performed. Veneered sheet: Veneer: 0.22mm thick oak veneer Adhesive: Vinyl acetate adhesive Backing material: Vinylon blended paper (basis weight 38g / m ² ) Synthetic resin film: Polyvinyl chloride (PVC) film, thickness 100 [mu] m - pressing process conditions - hot ^{press: 125 ℃ × 6kg / cm 2} × 10 min cold pressing: at 6 kg / cm ² for forced cooling to ambient temperature - evaluation - 7, grained in this example FIG. 8 is a photograph showing an enlarged cross section of a decorative sheet in a vascular region of a veneer, and FIG. 8 is a schematic diagram showing a cross-sectional configuration of a grain decorative sheet of this example drawn based on the photograph of FIG. 7. . As shown in these figures,
In this example of a grain decorative sheet,
The softened fluororesin film flows so as to penetrate into the duct concave portion of the veneer along the concave shape, and as a result, a dense uneven surface close to the oil-finished wood surface is formed. Thus, the grained decorative sheet of this example gave a feeling similar to that of the finished surface of the oil finish.

Example 5 Fluororesin coated wood decorative sheet (Embodiment 1c)-Materials used-Fluororesin film: Poly (vinylidene fluoride)
Matted resin film made of resin (PVDF) (thickness 30 μm) A benzophenone-based ultraviolet absorber is previously mixed into this fluororesin film (concentration: about 0.05% by weight). Adhesive material: Urethane-modified acrylic resin adhesive Application amount (solid content) 15 g / m ² Following application of this liquid adhesive to a veneer sheet (described below), the solvent in the adhesive was volatilized, and A so-called dry lamination process in which a fluororesin film is bonded is performed. Veneer sheet: Veneer: 0.22 mm thick oak veneer Adhesive: Vinyl acetate adhesive Backing material: Vinylon blended paper (basis weight 38 g / m ² ) Synthetic resin film: Low density polyethylene (LDPE) film, thickness 100 [mu] m - pressing process conditions - hot ^{press: 125 ℃ × 6kg / cm 2} × 10 min cold pressing: forced cooling at 6 kg / cm ² to ambient temperature - evaluation - obtained wood grain decorative sheet A dense uneven surface close to the surface of the oil-finished wood was formed, giving a feeling similar to that of the finished surface of the oil finish.

Example 6 Fluororesin coated wood decorative sheet (Embodiment 1c)-Materials used-Fluororesin film: poly (vinylidene fluoride)
Matted resin film made of resin (PVDF) (thickness: 30 μm, surface has a physical matte finish) Adhesive material: Urethane resin-based adhesive Application amount (solid content conversion) 15 g / m ² following application to the veneer bonding sheet of the liquid adhesive (below), the solvent in the adhesive is volatilized, then joined fluororesin film, performing so-called dry lamination. Veneered sheet: Veneer: 0.22mm thick oak veneer Adhesive: Vinyl acetate adhesive Backing material: Vinylon blended paper (basis weight 38g / m ² ) Synthetic resin film: Polyvinyl chloride (PVC) film, thickness 100 [mu] m - pressing process conditions - hot ^{press: 125 ℃ × 6kg / cm 2} × 10 min cold pressing: at 6 kg / cm ² for forced cooling to ambient temperature - evaluation - example 4 with equally good results Obtained. That is, in the grain decorative sheet made according to the present example, a dense uneven surface close to the oil-finished wood surface was formed, and a texture similar to that of the finished surface of the oil finish was given. .

Example 7 Fluororesin-coated wood grain decorative sheet (Embodiment 1c)-Materials used-Fluororesin film: poly (vinylidene fluoride)
Matted resin film made of resin (PVDF) (thickness: 30 μm, surface has a physical matte finish) Adhesive material: Acrylic-modified resin-based adhesive Application amount (solid content) After applying this liquid adhesive to a veneer-attached sheet (described below) at 15 g / m ² , a solvent in the adhesive is volatilized, and a so-called dry lamination process is performed in which a fluororesin film is attached. Veneered sheet: Veneer: 0.22mm thick oak veneer Adhesive: Vinyl acetate adhesive Backing material: Vinylon blended paper (basis weight 38g / m ² ) Synthetic resin film: Polyvinyl chloride (PVC) film, thickness 100 [mu] m - pressing process conditions - hot ^{press: 125 ℃ × 6kg / cm 2} × 10 min cold pressing: at 6 kg / cm ² for forced cooling to ambient temperature - evaluation - example 4 with equally good results Obtained. That is, in the grain decorative sheet made according to the present example, a dense uneven surface close to the oil-finished wood surface was formed, and a texture similar to that of the finished surface of the oil finish was given. .

Example 8 Fluororesin-coated wood decorative sheet (Embodiment 1c)-Materials used-Fluororesin film: poly (vinylidene fluoride)
Matted resin film made of resin (PVDF) (thickness: 30 μm, surface has a physical matte finish) Adhesive material: Urethane-modified vinyl resin-based adhesive Application amount (solid content conversion) 15 g / m ² Following application of this liquid adhesive to a veneer-attached sheet (described below), a solvent in the adhesive is volatilized, and a so-called dry lamination process in which a fluororesin film is attached is performed. Veneered sheet: Veneer: 0.22mm thick oak veneer Adhesive: Vinyl acetate adhesive Backing material: Vinylon blended paper (basis weight 38g / m ² ) Synthetic resin film: Polyvinyl chloride (PVC) film, thickness 100 [mu] m - pressing process conditions - hot ^{press: 125 ℃ × 6kg / cm 2} × 10 min cold pressing: at 6 kg / cm ² for forced cooling to ambient temperature - evaluation - 9 grained in this example FIG. 10 is a photograph showing an enlarged cross section of the decorative sheet at the vascular site of the veneer, and FIG.
FIG. 3 is a schematic diagram illustrating a cross-sectional configuration of a grain decorative sheet of this example, which is drawn based on the photograph of FIG. As shown in these figures, in the grain decorative sheet of this example, when laminated and integrated, the softened fluororesin film was insufficiently reduced in comparison with the case of Example 4 in the recess of the veneer. Therefore, the final finish is a state in which the adhesive material (urethane-modified vinyl resin-based adhesive) that has softened and flowed is filled in the bottom portion of the duct recess. However, the surface of the formed grain decorative sheet is formed with a recess which is not faithful but is synchronized with the vessel recess. Therefore, the grain decorative sheet of this example has an uneven surface somewhat similar to the surface of the oil-finished wood, and is inferior to the grain decorative sheet of Example 4, but has a finished surface of the oil finish. It gave a slightly similar feel to it. Of course, the grain decorative sheet of this example gave better results, that is, a texture similar to the finished surface of the oil finish, as compared with the grain decorative sheet of Comparative Example 1 shown below.

Comparative Example 1 Fluororesin-coated wood decorative sheet (following the procedure of form 1a)-Materials used-Fluororesin film: having a smooth surface made of tetrafluoroethylene-ethylene copolymer (ETFE) resin Film (not matte) (melting point 260
° C), thickness 20 µm Adhesive material: ethylene-ethyl acrylate copolymer (E
EA) hot melt adhesive, coating layer thickness 50 μm Following application to the veneer sheet, the solvent in the adhesive is volatilized, and a fluororesin film is attached.
A so-called dry lamination process is performed. Veneered sheet: Veneer: 0.22 mm thick oak veneer Adhesive: Vinyl acetate adhesive Backing: Vinylon blended paper (basis weight 38 g / m ² ) Synthetic resin film: Polyethylene film, thickness 100
μm −Conditions of pressing treatment− Hot pressing: 130 ° C. × 6 kg / cm ² × 10 minutes Cold pressing: Forced cooling to normal temperature at 6 kg / cm ² −Evaluation− FIG. 11 shows a tree of this comparative example. FIG. 12 is a photograph showing an enlarged cross section of a veneer sheet in a vascular region of a veneer, and FIG. 12 is a schematic diagram showing a cross-sectional configuration of the wood veneer sheet of this comparative example, which is drawn based on the photograph of FIG. 11. is there. As shown in these figures, in the grain decorative sheet of this example, during lamination and integration, the softened adhesive material flows so as to fill the entire recessed portion of the veneer of the veneer (ie, fluorine). The resin film can hardly penetrate into the recess of the vessel), and as a result, an almost smooth surface with little change in unevenness is formed. Therefore, the grain decorative sheet of this example does not give a feeling like a finished surface of an oil finish, but rather gives a feeling similar to a synthetic resin film having a roughened surface. .

REFERENCE EXAMPLE 1 Using a conventional oil finish paint (teak oil) mainly composed of linseed oil, the surface of a veneer-attached sheet having the following constitution was applied by an oil finish according to a conventional method. Finished. Veneer bonded sheet: Veneer: 0.22 mm thick oak veneer Adhesive: Vinyl acetate adhesive Backing: Vinylon blended paper (basis weight 38 g / m ² )-Evaluation-Fig. 13 shows the above oil-finished finish FIG. 14 is a photograph showing an enlarged cross section of a veneered sheet at a vascular site of the veneer, and FIG. 14 is a schematic diagram showing a cross-sectional configuration of the veneered sheet of this conventional example drawn based on the photograph of FIG. 13. . As shown in these figures, the oil-finished conventional veneer-attached sheet is formed such that the oil permeates the surface of the veneer and, for example, in a vessel recess, the oil-permeated area follows the concave shape. As a result, the fine unevenness of the wood surface is left as it is. Thus,
The sheet of this reference example gave a feel almost similar to the feel of the skin of natural wood, and exhibited the richness of wood.

Example 9 Fluororesin coated wood decorative board-Materials used-Fluororesin coated wood decorative sheet: Wood decorative sheet made according to Example 4 Base material: Volcanic glassy composite board (trade name) DAILIGHT, manufactured by Daiken Kogyo Co., Ltd.) 6 mm thick Adhesive: Styrene-butadiene latex-based adhesive-Production process-Adhesive is applied on a base material, and then, a fluororesin-coated wood decorative sheet is applied thereon. And hot-pressed with a press machine. - pressing process conditions - hot ^{press: 105 ℃ × 6kg / cm 2} × 2 min - Evaluation - resulting wood grain decorative board provides tactile and very similar hand feeling of the finished surface of a conventional oil finish Was something.

Example 10 Fluororesin-coated wood decorative board-Materials used-Fluororesin-coated wood decorative sheet: Wood decorative sheet base material prepared in Example 4 Base material: Volcanic glassy composite board (trade name) Adhesive: Styrene-butadiene latex-based adhesive-Manufacturing process-Adhesive is applied to the upper surface and both side surfaces of the base material, and then the examples are applied on those surfaces. 4 are laminated and then vacuum-pressed, whereby the wood decorative sheet 1 covers the upper surface and both side surfaces of the base material 9 as shown in FIG. Get the board. -Evaluation- The obtained grain-grained board gave a feeling similar to that of the finished surface of the conventional oil finish.

[0030]

As described above, according to the present invention,
Its surface is formed with small and large densities and has a texture and grain close to or comparable to the conventional wood surface by oil finish, giving a very close feel to the oil-finished surface of natural wood The present invention provides a wood decorative sheet and a wood decorative board coated with a fluororesin, which have excellent aesthetic effects and a very high commercial value. Moreover, one of the disadvantages of the conventional oil-finished surface is that it is inferior in light resistance (weather resistance) and chemical resistance. However, the wood decorative sheet and the wood decorative board according to the present invention are made of fluororesin. Since it is surface-coated with a film, it has the advantage that light resistance (weather resistance) and chemical resistance are significantly improved. Moreover, the wood decorative sheet (board) of the present invention has an advantage that a high adhesive strength can be obtained between the fluororesin film and the veneer-bonded sheet (board) thereunder by employing a specific adhesive material. Also have.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a fluororesin-coated wood grain decorative sheet according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view showing a fluororesin-coated wood grain decorative board according to Embodiment 2 of the present invention.

FIG. 3 is a diagram showing a stacking arrangement of respective members in a hot cold press machine when producing the grain decorative sheet shown in FIG. 1;

FIG. 4 is a cross-sectional view showing a laminate formed in the middle of the process of manufacturing the wood decorative sheet shown in FIG.

FIG. 5 is a view showing a stacking arrangement of respective members in a hot cold press machine when manufacturing the wood grain decorative board shown in FIG. 2;

FIG. 6 is a cross-sectional view showing a laminate formed in the middle of the process for manufacturing the wood dressing boat shown in FIG. 2;

FIG. 7 is a photograph showing an enlarged cross section of a veneer sheet of Example 4 in a vascular region of a veneer.

FIG. 8 is a drawing based on the photograph shown in FIG. 7;
It is a schematic diagram which shows the cross-section structure of the grain decorative sheet.

FIG. 9 is a photograph showing an enlarged cross section of a grain-decorated sheet of Example 8 at a vascular portion of a veneer.

FIG. 10 is a schematic diagram illustrating a cross-sectional configuration of a grain decorative sheet of Example 8 drawn based on the photograph illustrated in FIG. 9;

FIG. 11 is a photograph showing an enlarged cross section of a grain decorative sheet of Comparative Example 1 at a vascular portion of a veneer.

12 is a schematic diagram illustrating a cross-sectional configuration of a grain decorative sheet of Comparative Example 1 drawn based on the photograph illustrated in FIG. 11;

FIG. 13 is a photograph showing an enlarged cross section of a veneer-attached sheet of Reference Example 1 which has been oil-finished at a vascular portion of the veneer.

FIG. 14 is a schematic diagram illustrating a cross-sectional configuration of the veneered sheet of Reference Example 1, drawn based on the photograph illustrated in FIG. 13;

FIG. 15 is a sectional view showing a fluororesin-coated wood decorative board of Example 10.

[Explanation of symbols]

1. Fluororesin coated wood decorative sheet 2. Matted fluororesin film with a melting point of 220 ° C. or less 3. Adhesive material 4. Veneer pasted sheet 5. Veneer 6. Adhesive 7. Backing material 8. Veneered board 9. Substrate 10. Fluororesin coated wood decorative board 11. Laminated body 15. Laminated body 16. Laminated body 17. Laminated body

Claims (2)

[Claims] 1. A wood decorative sheet coated with a fluororesin, which is made by laminating and integrating a fluororesin film on the veneer surface of a veneer-laminated sheet via an adhesive material, wherein the fluororesin film is A matte fluororesin film made of a fluororesin having a melting point of 220 ° C. or lower, wherein the adhesive material is a modified polyolefin resin adhesive, a urethane resin adhesive, a urethane modified acrylic resin adhesive, urethane modified A wood decorative sheet characterized by being selected from the group consisting of a vinyl resin adhesive and an acrylic modified resin adhesive. 2. A wood decorative board coated with a fluororesin, which is produced by laminating and integrating a fluororesin film on a veneer surface of a veneer-laminated board via an adhesive material, wherein the fluororesin film is: A matte fluororesin film made of a fluororesin having a melting point of 220 ° C. or lower, wherein the adhesive material is a modified polyolefin resin adhesive, a urethane resin adhesive, a urethane modified acrylic resin adhesive, urethane modified A wood decorative board, which is selected from the group consisting of a vinyl resin adhesive and an acrylic modified resin adhesive.