JP2002357053A - Decorative laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative laminate for use as a sill 10 of a window frame which is constructed such that the sill 10 is protruded from jambs 20, 30 toward an indoor side, wherein the decorative laminate is resistant to scratches on corners 15, 16 of an indoor projecting portion 11 caused by collision of commodities with the corners during construction of a building or during application of the sill, or reduces its tendency to cause damage to the commodities due to collision with the corners 15, 16, or accidents such as injuries of human bodies. SOLUTION: According to the decorative laminate, corners 16, 15 defined by right and left side surfaces 14, 12 and an indoor side surface 13 of the projecting portion 11, are each formed into a convex surface with a radius of least curvature of 20 mm or more in horizontal cross section. Preferably, the side surfaces 12, 13, 14 (inclusive of the corners 15, 16) at the projecting portion 11 are each formed into a convex surface with a radius of least curvature of 2 mm or more in vertical cross section. Also preferably, the entire upper surface and of the decorative laminate, and a lower surface and the side surfaces 12, 13, 14 of the projecting portion 11 are covered with sticking a decorative sheet, for decoration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative panel used as a lower frame of a window frame in a building such as a detached house, an apartment house or an office building.

[0002]

2. Description of the Related Art As shown in FIG. 9, for example, a window frame of a conventional sash window of a building has vertical frames 20, 30 and an upper frame 40.
In general, the lower frame 10 and the lower frame 10 are all formed of square members or plate members having substantially the same width, and their indoor side end surfaces are all substantially in the same plane. On the other hand, as shown in FIG. 10, for example, the lower frame 10 protrudes more indoors than the vertical frames 20 and 30 so that articles such as potted plants and vases can be placed on the lower frame 10. There is a case where it is made to have a structure (this is also called a table board).
However, in the window frame having the conventional structure, the lower frame 10 is provided on the left and right sides of the indoor-side protruding portion 11 on the left and right sides and the indoor side surface 13 for convenience in construction.
And a substantially rectangular parallelepiped plate member having corner portions 15 and 16 substantially at right angles. But,
Since the lower frame 10 having such a shape has both right and left ends of the projecting portion 11 projecting in a substantially right-angled shape toward the indoor side, this corner 15 ,
The corners 15 and 16 may be damaged by the collision of the objects with the corners 16, or the corners 15 and 16 may damage the objects, or may be injured by the collision of the corners 15 and 16 with the human body. There was a problem.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and has a structure in which the lower frame 10 projects from the vertical frames 20 and 30 to the indoor side. In the decorative panel used for the lower frame 10 in the window frame, the corners 15 and 16 of the protruding portion 11 to the indoor side are damaged due to collision of objects during construction or use of the building (dent damage).
It is another object of the present invention to provide a decorative board in which accidents such as damage to objects and injury to a human body due to collision with the corners 15 and 16 are unlikely to occur.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to a pair of vertical frames which are spaced apart in the horizontal direction and which are installed vertically in parallel with each other, and spans between the upper and lower ends of the pair of vertical frames. A window having a structure in which an indoor-side end of the lower frame forms a protruding portion that projects more toward the indoor side than the indoor-side end surface of the vertical frame. In the decorative panel for use in the lower frame of the frame, the corners formed by the left and right side surfaces and the indoor side surface of the protruding portion form a convex curved surface having a minimum curvature radius of a horizontal cross section of 20 mm or more. It is a decorative plate characterized by having.

[0005] Further, in the decorative plate, the side surface of the protrusion has a convex curved surface having a minimum radius of curvature of 2 mm or more in a vertical cross section.

In the decorative plate, the minimum radius of curvature of the vertical cross section between the upper surface and the side surface of the protrusion is 2
mm or more, and the angle between the upper surface and the upper surface is 90 degrees or more.
A decorative plate having a notch that is less than 0 degrees and forms a concave curved surface that is smoothly continuous without forming an angle with the convex curved surface formed by the side surface.

Further, in the decorative plate, the entire upper surface,
It is characterized in that makeup is applied to a side surface of the protruding portion (including a notch portion when a notch portion is provided between the protruding portion and the upper surface) and a lower surface of the protruding portion by sticking a decorative sheet. It is a decorative board to do.

[0008]

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

FIG. 1 is a schematic view schematically showing an embodiment of a window frame using the decorative board of the present invention as a lower frame 10, in which vertical frames 20, 30, an upper frame 40 and a lower frame 10 are formed. When viewed from a direction perpendicular to the window surface, it is configured in a mouth shape. However, in this figure, the inside of the mouth-shaped window frame is an opening in which a glass window or the like is installed so as to be openable and closable, and the outside of the window frame is an inner wall surface. In the example shown in FIG. 1, the upper frame 40 has a linear shape in the left-right direction. However, the upper frame 40 may have any shape such as a mountain shape, an arch shape, or a flame shape as desired depending on the purpose of decoration. It is also possible to form a part or the whole thereof with the vertical frames 20 and 30 as an integral structure.

The decorative panel of the present invention used as the lower frame 10 has an indoor-side end projecting from the indoor-side end surfaces of the vertical frames 20 and 30 to the indoor side to form a projecting portion 11.
The shape of the corners 15 and 16 between the left and right side surfaces 12 and 14 and the indoor side surface 13 of the protruding portion 11 has a curved shape protruding toward the indoor side in a horizontal cross section. ,
The minimum radius of curvature is at least 20 mm. FIG. 2 is a plan view of the decorative plate (the lower frame 10). Although the upper limit of the minimum radius of curvature is not particularly limited in the present invention, the width of the projecting portion 11 toward the indoor side in the direction perpendicular to the window surface is usually about 50 to 300 mm. The upper limit of the minimum radius of curvature of the corners 15 and 16 is naturally determined, and is usually about 200 mm or less.

The left and right side surfaces 12, 14 of the lower frame 10 may be in the same plane as the left and right outer end surfaces of the vertical frames 20, 30, respectively. However, as in the examples shown in FIGS. 1 and 2, the left and right side surfaces 12 and 14 of the lower frame 10 are
If it is made to protrude to the left and right outer sides from the left and right outer end faces of the lower frame 30, the mounting area of the article on the lower frame 10 increases, and the article near the both ends of the window opening on the lower frame 10 (the vertical frame 20,
(In the vicinity of 30), since the overhanging portions 17, 18 of the lower frame 10 exist on the left and right outer sides thereof, the objects and the human body carelessly come into contact with the mounted article, It is effective in preventing accidents such as falling down, and it is desirable that the overhanging portion has a decorative effect in terms of design.

The projecting portion 11 of the decorative plate (lower frame 10) into the room has not only curved left and right corners 15 and 16 in a horizontal plane, but also curved side surfaces 12, 1 and 2.
It is also desirable that the vertical sections 3 and 14 (including the corner sections 15 and 16) have curved surfaces that are convex toward the indoor side.
FIG. 3 is an example of a vertical cross-sectional view taken along the line XY of the decorative board shown in FIG.
3 and the lower surface 1B are formed into a series of smooth curved surfaces, so that even if an object collides with the side surface 13 of the decorative board, a corner between the side surface 13 and the upper surface 1A or the lower surface 1B is formed. There is an advantage that scratches are less likely to occur. This point is exactly the same on the left and right side surfaces 12 and 14 of the protrusion 11. For such a purpose, it is desirable that the minimum radius of curvature in the vertical cross section of the curved surface portion of the side surface 13 be 2 mm or more. Although there is no particular upper limit for the minimum radius of curvature, the lower frame 1
0 is usually about 20 to 50 mm, and accordingly the upper limit of the minimum radius of curvature is naturally determined.
5 mm or less.

In the example shown in FIG. 3, a decorative plate (lower frame 10)
A cutout 1C having an L-shaped vertical cross section is provided on the lower surface 1B of the portion excluding the protruding portion 11 toward the indoor side. The notch 1 </ b> C is fitted into the lower end surface of the opening provided on the wall surface of the building from the indoor side, so that the end surface of the wall opening is concealed. The finish appearance excellent in aesthetic appearance can be obtained without requiring special cosmetic treatment.

The side surfaces 12, 13, 14 and the upper surface 1A may be continuous by a smooth curved surface as shown in FIG. 3, but as shown in FIG. 1
A notch 19 that forms an angle with A may be provided.
In this manner, the corner between the notch 19 and the end near the end of the upper surface 1A exists as a line inside the side surfaces 12, 13, and 14 shown in FIG. This makes it easier to visually recognize the boundary of the flat portion, and is effective in preventing an accident in which the article is placed too close to the end and dropped when placed on the upper surface 1A.

The notch 19 and the side surfaces 12, 13, 14
When an angle is formed between the notch and the corner, when the article collides with the corner, the corner may be damaged or the article may be damaged. Therefore, the notch 19 has a minimum curvature radius of 2 mm or more, preferably 5-
It is desirable to have a concave curved surface of about 15 mm and a shape that is smoothly continuous with the side surfaces 12, 13, 14 without forming an angle. In addition, the angle between the upper surface 1A and the upper surface 1A must be obtuse, that is, 90 degrees or more and less than 180 degrees. If the angle is too small, it is possible to prevent corners from being damaged by the collision with the article and damage to the article. On the contrary, if it is too large, it is difficult to visually recognize the corners. Therefore, the angle is preferably set to 110 degrees or more and 150 degrees or less.

In the decorative board of the present invention, the entire surface of the upper surface 1A, the side surfaces 12, 13, and 14 of the projection 11 and the lower surface 1B of the projection 11 are exposed in use.
In addition, it is desirable to apply makeup by attaching makeup sheets 1F and 1G. Since the decorative sheets 1F and 1G can be given a design property by a desired arbitrary pattern by a printing method or the like, various kinds of materials for the decorative board main body can be obtained by sticking the decorative sheet on the surface of the decorative board main body. No need
A decorative board having various types of surface designs can be easily manufactured, and a decorative board having stable design quality can be mass-produced without being affected by variations in the material of the decorative board body.

However, since it is impossible to adhere one planar decorative sheet continuously over the five surfaces of the three-dimensional shape even from a geometrical point of view, a plurality of decorative sheets are required. It is necessary to use two sheets, and inevitably the side surface 1 at the end of the protrusion 11
Seams occur near 2, 13, and 14. At that time, if the seam is near the boundary between the upper surface 11, the side surfaces 12, 13, 14 and the lower surface 1B, the decorative sheet is likely to be peeled off from the seam. Therefore, in the decorative board of the present invention, as shown in FIG.
The upper surface 1A side and the lower surface 1B
It is desirable to attach the two decorative sheets 1F and 1G on the side.

In the manufacture of such a decorative board, as shown in FIG. 5, the main body of the decorative board is composed of two plate-like bodies, an upper plate 1D and a lower plate 1E, which are almost equally divided vertically. 1D
The decorative sheet 1F is stuck from the upper surface 1A to the side surfaces 12, 13, and 14, while the lower surface 1B to the side surface 1 of the lower plate 1E.
The decorative sheet 1G is stuck over 2, 13, and 14, and thereafter, the upper plate 1D and the lower plate 1E are bonded to the decorative sheets 1F and 1G.
It is preferable to adopt a method of joining non-sticking surfaces. Upper plate 1
The thickness of D and the lower plate 1E may be the same or different, and may be designed according to the thickness required for the protrusion 11 and the depth required for the notch 1C. Upper plate 1D
As a method of joining the lower plate 1E and the lower plate 1E, there are a bolting method, an adhesive method, a nailing method, and the like, but the bolting method is most preferable in terms of easy workability, joining strength, long-term stability, and the like.

Decorative sheet 1 for upper plate 1D and lower plate 1E
F and 1G are adhered using the decorative sheet 1F or 1G made of a thermoplastic resin having thermoformability, and formed along the outer surface of the upper plate 1D or the lower plate 1E by a vacuum forming method. It is good to adopt the method of sticking. In this way, the decorative sheet is continuously formed from the upper surface 1A or the lower surface 1B of the upper plate 1D or the lower plate 1E to the side surfaces 12, 13, 14 (however, the upper half or the lower half of the decorative plate to be manufactured). Since 1F or 1G is stuck, the decorative sheet 1
F and 1G cover the upper plate 1D and the lower plate 1E three-dimensionally (three-dimensionally), so that the seam between the decorative sheets 1F and 1G is present in the approximate center of the side surfaces 12, 13, and 14. However, an accident in which the decorative sheets 1F and 1G are peeled off by the joint is relatively unlikely to occur.

This is a point that is greatly different from the decorative board used in the conventional lower frame 10 of the embodiment shown in FIG. That is, the corners 15, 16 which are substantially perpendicular to the boundaries of the side surfaces 12, 13, 14 of the decorative board (lower frame 10) as in the prior art.
Is present, the upper or lower surface and the three side surfaces 12,
It is extremely difficult to attach one decorative sheet 1F or 1G over the layers 13 and 14 even by the above-described vacuum forming method. Therefore, in the case of a decorative board of such a shape,
One decorative sheet is continuously adhered from the upper surface to the lower surface through the indoor side surface 13 by a lapping method, and another decorative sheet (edge sheet) is adhered to the left and right side surfaces 12 and 14, respectively. I have to adopt a method to do it. However, in such a configuration, the left and right side surfaces 12, 14
In this case, the decorative sheet merely covers the decorative sheet body in a planar manner, and furthermore, there is a seam of the decorative sheet at the corner between the left and right side surfaces 12 and 14 and the upper and lower surfaces or the indoor side surface 13. In order to do this, the seam triggers the side 12,
It is easy to cause peeling of the fourteen decorative sheets.

In the embodiment shown in FIG. 5, in order to more reliably prevent the decorative sheets 1F and 1G from peeling off from the seam, as shown in FIG.
From the upper surface 1A of the upper plate 1D and the lower surface 1B of the lower plate 1E.
After the side surfaces 12, 13 and 14, the lower plate 1D and the upper surface of the lower plate 1E are rolled up to the vicinity of the side surfaces 12, 13 and 14 on the upper surface thereof, and are adhered (rolling portion 1H). The lower surface of the upper plate 1D and the upper surface of the lower plate 1E may be joined together with the portion 1H.

In this manner, the protrusions 11 of the decorative board (the lower frame 10) can be used to make the decorative sheet 1F,
Since the decorative sheets 1F and 1G are covered with 1G and the seams of the decorative sheets 1F and 1G are not exposed to the outside, the decorative sheets 1F and 1G are extremely difficult to peel off. Further, the upper plate 1D and the lower plate 1 which are the decorative plate main bodies are provided through the gaps between the joint portions of the decorative sheets 1F and 1G.
The surface of E is not seen, and there is no unusual appearance.
The width of the winding part 1H may be about 1 to 10 mm. According to the above-described vacuum forming method, the decorative sheets 1F and 1G are attached to the upper plate 1D and the lower plate 1E while forming the winding part 1H of about several mm. Wearing can also be easily performed.

In the decorative panel of the present invention, the materials of the decorative panel main body (upper panel 1D, lower panel 1E) and decorative sheets 1F and 1G to be adhered to the surface thereof as required are not particularly limited. Absent. Examples of the decorative board main body include wood veneer, plywood, laminated wood, veneer laminate (LVL), and oriented board (O).
SB), particle board, medium density fiberboard (MD
F), wood-based materials such as hard fiberboard (HDF), metal-based materials such as aluminum, steel, brass, and stainless steel; natural stones such as marble and granite; gypsum boards; calcium silicate boards; cement boards; and concrete boards. And other inorganic materials, synthetic resin materials such as fiber reinforced plastic (FRP), etc.
Alternatively, it can be appropriately selected from a composite of two or more of them. Above all, a light-weight, medium-density fiberboard having good processability and moderate strength is used as a decorative board main body, and decorative sheets 1F, 1G for surface decoration and surface protection are provided on predetermined portions of the surface thereof.
Is most desirably employed.

As is well known, the above-mentioned medium-density fiberboard is prepared by adding an appropriate adhesive to beaten wood fibers to have a density of 0.35 to 0.35.
It is molded into a plate shape of about 0.8 g / cm ³ , and urea resin-based, urea-melamine resin-based and phenol resin-based ones are commercially available depending on the type of adhesive used. Although any of them can be used in the present invention,
Urea-melamine resin, which is generally known as a water-resistant type, when considering the dimensional stability and swelling resistance against dew condensation etc. when installed as a window lower frame, workability and economy, ease of procurement in the market, etc. The system is most suitable.

The decorative sheets 1F and 1G are, as described above,
In order to adhere along the three-dimensional shape including the curved surface of the upper board 1D and the lower board 1E which are the decorative board main bodies, it is desirable to employ a thermoplastic resin having thermoformability. Specifically, those made of polyvinyl chloride resin, polyolefin resin, polyester resin, acrylic resin, and the like can be suitably used. Decorative sheet 1F, 1G
Is usually about 50 to 300 μm.

The decorative sheets 1F and 1G may have a single-layer structure in which a design pattern is applied to the front or back surface of one sheet made of the above-described thermoplastic resin by printing or the like. However, as shown in FIG. 7, for example, as shown in FIG. 7, a pattern layer is provided for the purpose of achieving both protection of the pattern from an adhesive or the like at the time of sticking to the decorative plate main body and protection of the pattern from external stimulus after sticking. In general, a decorative sheet 50 having a multilayer structure in which the thermoplastic resin sheet 53 is sandwiched between two thermoplastic resin sheets, a base sheet 52 and a transparent protective sheet 55, is employed.

Here, the base sheet 52 and the transparent protective sheet 55 may be formed of the same material, or may be different from each other. Specific material combinations (transparent protective sheet 55 / base sheet 52) include, for example, polyvinyl chloride / polyvinyl chloride, acrylic / polyvinyl chloride, polyvinyl chloride / acrylic, polyester / polyvinyl chloride, and polyvinyl chloride. / Polyester, polyolefin / polyolefin, polyolefin / polyester, polyester / polyolefin, polyolefin /
Acrylic, acrylic / polyolefin, polyester /
There are polyester, polyester / acryl, acrylic / polyester, acrylic / acryl and the like. Among them, 3
A combination of polyolefin / polyester or polyolefin / acryl, which has excellent balance of three-dimensional vacuum forming suitability, chemical resistance, solvent resistance, scratch resistance, abrasion resistance and other surface properties, and low-temperature impact resistance. It is most desirable to adopt

As the polyolefin resin used for the transparent protective sheet 55, for example, a homopolypropylene resin,
Although a random polypropylene resin, a polyethylene resin and the like can be used, it is most preferable to use a homopolypropylene resin having excellent surface scratch resistance. If necessary, soft components such as low-density polyethylene, ethylene-α-olefin copolymer rubber, styrene-butadiene copolymer rubber or a hydrogenated product thereof may be added to improve vacuum forming suitability and impact resistance. Can also.

As the polyester resin used for the base sheet 52, an amorphous polyester resin (so-called A-PET) or a copolymerized polyester resin is more preferable than a resin having a high crystallinity such as a biaxially stretched polyethylene terephthalate resin. A resin having a low degree of crystallinity, such as a typical example of 1,4-cyclohexanedimethanol copolymerized polyethylene terephthalate resin such as PETG (registered trademark) manufactured by Eastman Chemical Company, is more suitable for three-dimensional vacuum forming. It is desirable in terms of low-temperature impact resistance, bending whitening resistance, and the like.

On the other hand, the acrylic resin is based on polymethyl methacrylate, and is a copolymer component of (meth) acrylic acid ester other than methyl methacrylate, styrene, vinyl ester and the like; styrene-butadiene rubber;
Resins to which a rubber component such as methyl methacrylate-butadiene rubber or the like is appropriately added can be suitably used.

A pigment such as titanium dioxide, iron oxide, carbon black or the like may be added to the base sheet 52, if necessary, to make the decorative sheet 50 concealable. Further, the surface protection sheet 55 includes, for example, a benzotriazole-based or benzophenone-based ultraviolet absorber,
By adding a hindered amine-based light stabilizer or the like, the decorative sheet 50 can have weather resistance. As for the weather resistance of the decorative sheet 50, from the use as the lower frame 10 in a window frame of a building such as a house, the accelerated weather resistance test 2000 by Sunshine Weather O Meter (SWOM)
That the color difference ΔE before and after the test in the time is 10 or less,
One guide.

The pattern layer 53 is generally formed by printing on the upper surface of the base sheet 52 or the lower surface of the transparent protective sheet 55 by, for example, a gravure printing method. As the ink used for printing, for example, a two-liquid urethane resin system, an acrylic resin system, an acryl / vinyl acetate resin system, or the like can be used. It is also possible to provide an easily adhesive layer of a vinyl resin or the like. As a method of imparting a design effect other than the pattern layer 53, an embossed pattern 56 may be provided on the surface of the surface protection sheet 55.

The base sheet 52 and the transparent protective sheet 55 may be laminated by a heat laminating method or an extrusion laminating method without interposing the adhesive layer 54, or may be laminated by a dry laminating method or the like via the adhesive layer 54. Lamination may be performed by a heat lamination method or the like. As the adhesive layer 54, any known adhesive such as a two-liquid urethane resin may be used. In addition, a primer layer 51 may be provided on the back surface of the base sheet 52 in order to improve the adhesiveness with the decorative plate main body by the adhesive. As the primer layer 51, for example, a two-liquid urethane-based resin or the like can be used, and a filler such as silica, calcium carbonate, barium sulfate, or the like may be added as needed.

It is desirable to provide a transparent protective layer 57 on the surface of the surface protective sheet 55. For the transparent protective layer 57, for example, a thermosetting resin such as a two-component curable urethane resin, a melamine resin, or an unsaturated polyester resin, or an ionizing radiation curable resin such as a (meth) acrylate resin is used. . Since the application is also exposed to direct sunlight, it is desirable to add an ultraviolet absorber or a light stabilizer. If necessary, a matting agent such as silica powder can be added to adjust the luster to an appropriate state. Further, it is also possible to obtain a visual three-dimensional design effect by changing the gloss of the surface by providing a plurality of types of transparent protective layers 57 having different gloss states in a pattern.

The transparent protective layer 57 may be provided in the state of the decorative sheet 50 before being attached to the decorative plate main body.
The thermosetting resin or the ionizing radiation-curable resin described above may not have sufficient suitability for vacuum molding. In such a case, the decorative sheet 50 in which the transparent protective layer 57 is not yet provided is replaced with the decorative sheet main body. After sticking to the transparent protective layer 57
Can also be provided.

FIG. 8 shows an example of this, in which the surface of the transparent protective sheet layer 55 of the decorative sheet 50 similar to the above is replaced with a recoat made of a resin composition having post-coating suitability instead of the transparent protective layer 57. A layer 58 is provided. After this decorative sheet 50 is adhered to the surface of the decorative plate main body by a vacuum forming method or the like, a post-coating is performed on the surface of the recoat layer 58 to form a post-coated coating film 59. Such a technique,
The post-coating film 59 is suitable when it is necessary to apply a thick (for example, a film thickness of 10 μm or more) hard coating material having a particularly high crosslinking density, such as an ionizing radiation-curable coating material.

By adopting the above structure, even a hard coating film which is not suitable for vacuum forming because of high cross-linking density and difficulty in elongation,
Since it can be provided as the post-coating film 59 after vacuum forming, it is possible to easily obtain a decorative plate having a higher surface hardness and excellent scratch resistance and abrasion resistance. In this case, as the recoat layer 58, it is necessary to select a material having excellent adhesiveness to the transparent protective sheet layer 55 and toughness that can withstand the curing shrinkage of the paint, and having high adhesive strength and internal cohesion. For example, a two-liquid urethane resin or the like can be suitably used.

[0038]

[Example] <Preparation of decorative sheet> Copolymerized polyester resin (Easter PETG, manufactured by Eastman Kodak Company)
(Registered trademark)), a coloring pigment (known transparent and opaque pigments and dyes), an inorganic filler, an ultraviolet absorber, and a light stabilizer are added to form a pellet, and then the pellet is extruded to a thickness of 60 μm.
To obtain a colored copolymerized polyester resin sheet. Next, on the surface of the colored copolyester resin sheet, a wood grain pattern was printed with an acrylic resin-based gravure printing ink, and a primer layer was formed on the back surface with a urethane resin. An acrylate-based adhesive resin and a homopolymerized polypropylene resin to which 0.2% by weight of a light stabilizer and 0.3% by weight of an ultraviolet absorber have been added are co-extruded and laminated so as to have a thickness of 20 μm and 60 μm, respectively. To form a transparent protective sheet layer. Finally, a two-component urethane-based recoat resin (UC Clear, manufactured by Dainippon Ink & Chemicals, Inc.) is dried on the surface of the transparent protective sheet layer by a gravure coating method. A recoat layer was formed at an application amount of 4 g / m ² to prepare a decorative sheet used for the decorative plate of the present invention.

<Preparation of Veneer Body> According to the shapes shown in FIGS. 2 and 6, first, the outer dimensions are 196.5 mm in length × 40 in width.
A right and left back part of a urea-melamine resin medium density fiberboard (MDF) of 0 mm × 18 mm is 76.5 mm long × 50 mm wide.
And cut the front left and right corners to a radius of curvature 40 mm in a horizontal plane, and the left and right and front side surfaces including the cut corners in order from the top surface in the vertical cross section. A concave curved surface having a radius of curvature of 8 mm forming an angle of about 120 degrees with the upper surface at a horizontal distance of 15 mm from the side end, and a convex curved surface having a radius of curvature of 8 mm smoothly continuing with the concave curved surface at an inclination of about 15 degrees; An upper plate, which is a part of the main body of the decorative plate of the present invention, was cut into a shape having a convex curved surface and a smoothly continuous vertical surface having a width of 5 mm.

On the other hand, the outer dimensions are 120 mm long × 400 m wide.
mx 12 mm thick urea-melamine resin medium-density fiberboard (MDF) with the right and left corners on the near side in a horizontal plane with a radius of curvature of 4
A convex curved surface which is cut to 0 mm and which has a corner formed by the side surface on the left and right side and the front side including the cut corner and the lower surface, and which has a radius of curvature of 4 mm in its vertical cross section and smoothly continues to the lower surface and each side surface. To form a lower plate, which is the remaining part of the main body of the decorative board of the present invention.

<Attachment of decorative sheet> A width of about 4 mm from the entire upper surface of the upper plate, the side surfaces on the left and right sides and the front side, and the left and right sides and the front side (including the cut corners) on the lower surface.
Aqueous two-component urethane resin adhesive is applied to the surface of the mm part to a coating amount of 10 g / m ² after drying, and touch-dried,
This is placed on a mounting table of a vacuum forming machine with its upper surface facing upward through a thick plate jig having a smaller area than the upper plate so that the vicinity of the adhesive application portion on the lower surface is exposed. Perform vacuum forming under the condition of a sheet temperature of 60 ° C. using the sheet,
The decorative sheet was adhered to the adhesive-applied portion of the upper plate while being wound around the lower surface near the side surface. Thereafter, the decorative sheet other than the adhesive-applied portion and not adhered to the upper plate was cut off. In addition, according to substantially the same procedure as above, the width of about 4 mm from the entire lower surface of the lower plate, the side surfaces on the left and right sides, and the left and right sides and the front side (including the cut corners) on the upper surface. A decorative sheet was attached to the part.

<Preparation of decorative sheet> The surface of the upper plate and the lower plate to which the decorative sheet is adhered (except for the decorative sheet winding portion on the lower surface of the upper plate and the upper surface of the lower plate) is ultraviolet-cured by a flow coating method. A mold paint is applied at an application amount of 20 g / m ² and cured by irradiating ultraviolet rays with a high-pressure mercury lamp (80 W / cm × 2 lamps, 30 m / min) to form a post-coating film. The lower surface and the upper surface of the lower plate were joined with an adhesive with their left and right sides and the front side edges aligned, thereby producing a decorative plate of the present invention.

<Physical Property Test> When the weather resistance of the decorative board was evaluated by an accelerated weather resistance test (SWOM), the change in color difference ΔE = 8 between before irradiation and after irradiation for 2,000 hours under rainfall conditions of 18 minutes in 120 minutes was observed. It was confirmed that it had sufficient weather resistance for window frames. In addition, it has been confirmed that there is no particular problem such as surface strength, bending workability, R shape, scratch resistance, abrasion resistance, chemical resistance, solvent resistance, impact resistance, stain resistance, water resistance, cold heat repetition, etc. Was done.

[0044]

According to the decorative panel of the present invention, when used as a lower frame in a window frame, the corner formed by the left and right side surfaces and the indoor side surface in the protruding portion toward the indoor side has a horizontal cross section. The minimum radius of curvature is 20 mm or more, so that it has a convex curved surface. Accidents such as scratches at the corners (dents), damage to objects, and injuries to the human body are unlikely to occur, and it can be used safely while maintaining good appearance quality for a long period of time.

Further, since the side surface of the protrusion has a convex curved surface having a minimum radius of curvature of 2 mm or more in a vertical cross section, objects are formed at corners between the upper surface or the lower surface of the protrusion and the side surface. Even if a collision occurs, accidents such as damage to the corners of the decorative panel and damage to objects are unlikely to occur, and the panel can be used safely while maintaining good appearance quality for a long period of time.

Further, between the upper surface and the side surface of the projecting portion,
The minimum radius of curvature of the vertical cross section is 2 mm or more, the angle between the upper surface and the upper surface is 90 degrees or more and less than 180 degrees, and the surface is smoothly continuous without forming an angle with the convex curved surface formed by the side surface. By having a notch having a concave curved surface, when placing an article on the decorative board, the visibility of the boundary between the flat section and the curved face section at the end of the upper surface of the decorative board is increased, and the article is placed on a flat surface. It is easy to place safely inside the department,
It is possible to effectively prevent a fall accident from the end of the article.

Further, a decorative sheet is attached to the entire upper surface, the side surface of the protruding portion (including the notch portion if a notch portion is provided between the upper surface portion), and the lower surface of the protruding portion. Is applied, it is possible to easily produce a large number of decorative boards having various desired surface designs with stable quality.

[Brief description of the drawings]

FIG. 1 is a schematic view schematically showing an example of construction of a window frame using an example of a decorative board of the present invention as a lower frame.

FIG. 2 is a plan view schematically showing one example of a decorative board of the present invention.

FIG. 3 is a vertical sectional view schematically showing one example of a decorative board of the present invention.

FIG. 4 is a vertical sectional view schematically showing one example of a decorative board of the present invention.

FIG. 5 is a vertical sectional view schematically showing one example of a decorative board of the present invention.

FIG. 6 is a vertical sectional view schematically showing one example of the decorative board of the present invention.

FIG. 7 is a vertical sectional view schematically showing one example of a decorative sheet used for the decorative board of the present invention.

FIG. 8 is a vertical sectional view schematically showing one example of a decorative sheet used for the decorative board of the present invention.

FIG. 9 is a schematic view schematically showing a construction example of a conventional window frame.

FIG. 10 is a schematic view schematically showing a construction example of a conventional window frame.

[Explanation of symbols]

 Reference Signs List 10 lower frame 11 projecting part 12 left side surface 13 indoor side surface 14 right side surface 15 corner part 16 corner part 17 left overhang part 18 right overhang part 19 notch part 1A top surface 1B bottom surface 1C notch part 1D top plate Reference Signs List 1E lower plate 1F decorative sheet 1G decorative sheet 1H winding part 20 vertical frame 30 vertical frame 40 upper frame 50 decorative sheet 51 primer layer 52 base material sheet 53 picture layer 54 adhesive layer 55 transparent protective sheet 56 uneven pattern 57 transparent protective layer 58 Recoat layer 59 Post-coat paint film

Continuation of front page (72) Inventor Yukio Suzuki 1-5-1, Taito, Taito-ku, Tokyo Letterpress Printing Co., Ltd.

Claims (4)

[Claims] 1. A pair of vertical frames spaced apart in the horizontal direction and installed in the vertical direction in parallel with each other, an upper frame installed between upper end portions and lower end portions of the pair of vertical frames, and And a lower frame for use in a lower frame of a window frame having a structure in which the indoor end of the lower frame has a protruding portion protruding more indoors than the indoor end surface of the vertical frame. Wherein the corner formed by the left and right side surfaces and the indoor side surface of the protrusion forms a convex curved surface having a minimum curvature radius of 20 mm or more in a horizontal cross section. . 2. The decorative plate according to claim 1, wherein the side surface of the projection has a convex curved surface having a minimum radius of curvature of 2 mm or more in a vertical cross section. 3. The vertical cross section has a minimum radius of curvature of 2 mm or more between an upper surface and a side surface of the protrusion, an angle between the upper surface and the upper surface is 90 degrees or more and less than 180 degrees, and The decorative board according to claim 2, further comprising a notch portion that forms a concave curved surface that is smoothly continuous without forming an angle with the convex curved surface that forms. 4. The entire upper surface and a side surface of the protruding portion (including a notch portion if a notch portion is provided between the upper surface).
A makeup is applied to a lower surface of the protruding portion by sticking a decorative sheet.
The decorative plate according to any one of the above.