JP2002103491A - Decorative laminated sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative laminated sheet which can be installed without exposing end parts and also a manufacturing cost is held down. SOLUTION: The decorative laminated sheet, in which a decorative sheet 3 is stuck on the surface of a base 2, is constituted so that the end parts of the decorative sheet 3 are extended in an unbonded state from the side end parts of the base and become excess parts 3a. In the case of parallel joint sticking, installation can be easily performed by inserting a rod thinner than the base 2 into a joint groove between the bases as the press board of a joint and laying the excess parts 3a of the decorative sheet 3 onto the rear of the press board of the joint. In the case of spreading the decorative laminated sheet by sticking it, release of the sheet from the end parts of the decorative laminated sheet can be prevented by entraining the decorative sheets remaining in the end parts into the rear of the decorative laminated sheet and bonding the same together with the substrate base material for installation. A large-scale installation such as a lapping working machine is not necessary because of flat cladding, in which the decorative sheet 3 is stuck on only the top panel part of the base 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative board suitably used as an interior material for a house.

[0002]

2. Description of the Related Art In general, there are various types of decorative boards as interior materials for houses. For example, as a decorative board used for a waist wall or the like, there is a decorative sheet bonded to a surface of a substrate made of a fiberboard, a plywood, a veneer, a plastic plate, a metal plate, and the like. What has been subjected to a so-called wrapping process in which an end surface is covered with a decorative sheet, or a product subjected to post-form processing (not shown) is often used.

[0003] The decorative plate subjected to the lapping process or the like as described above has the advantages that the side end surface of the substrate is not exposed and that the decorative sheet is unlikely to be peeled off from the end after construction. Also, in the state where the side end surface is exposed, the substrate side end surface and the decorative sheet side end surface are exposed and conspicuous at the side end surface of the decorative board. (See Fig. 3) for example, but it is possible with a decorative board that has been subjected to lapping or the like.

[0004]

The above-mentioned lapping process is performed by using a lapping machine as shown in FIG. This lapping machine uses a plurality of lapping rollers 10a to 10e, and sequentially presses the decorative sheet S onto three surfaces of the columnar substrate B moving on the transport roller 11 to bond the decorative sheet S into a decorative plate. In the illustrated lapping machine, the decorative sheet S unwound from the winding 12 is coated with an adhesive by a T-die type adhesive coating head 13, but may be coated by a roll coater. Not for the decorative sheet S,
An adhesive may be applied to the columnar substrate B side. Also,
The preheating device 14 for the columnar substrate B is appropriately provided as needed.
The wrapping rollers 10a to 10e usually use a metal (iron or the like) whose core surface is covered with an elastic material such as silicon rubber, but a metal roll may be used. In addition,
In FIG. 6, peripheral auxiliary equipment such as a bearing, power, and a tension adjusting mechanism are not shown. Such a wrapping machine is
JP-B-61-5895, JP-B-56-23777
And JP-B-57-5183.

As described above, the lapping process is performed using a large-scale facility as shown in FIG. Therefore, although the decorative board subjected to lapping or the like has the above-mentioned advantages in construction, the cost of equipment used for lapping is high, which raises the processing cost of the product.

The present invention has been made in view of such circumstances, and a purpose of the present invention is to provide a decorative board which can be constructed without exposing the side end face of the substrate, while reducing the processing cost. Is to provide.

[0007]

Means for Solving the Problems In order to achieve the above object, a decorative board of the present invention is a decorative board in which a decorative sheet is bonded to a surface of a substrate, and the decorative sheet is provided at both ends of the substrate. The side end is extended from the side end of the substrate in an unbonded state to be a surplus part.

[0008]

FIG. 1 is a perspective view showing an example of a decorative board according to the present invention. As shown in FIG. 1, the decorative board 1 has a decorative sheet 3 attached to a surface of a substrate 2. However, the side edges of the decorative sheet 3 are not completely aligned with the side edges of the substrate 2 at both end portions Eb, Eb of the substrate 2, but the decorative sheet 3 is at least as long as the thickness of the substrate 2. And the surplus portion 3a is provided.

As the substrate to which the decorative sheet is to be attached, a flat plate is used. As materials, cedar, pine, zelkova,
Single veneer, plywood, laminated wood, particle board, fiberboard (medium density fiberboard (MD
F), wood board such as hard board etc.), metal sheet such as iron, carbon steel, stainless steel, aluminum, duralumin, copper, cement, slag cement, pulp cement, AL
C (lightweight cellular concrete), GRC (glass fiber reinforced concrete), gypsum, non-ceramic ceramic plates such as calcium silicate, ceramic plates such as pottery, porcelain, earthenware, polyvinyl chloride, acrylic resin, ABS resin, phenol resin, A resin plate such as polyolefin resin or FRP (fiber reinforced plastic) is used.

[0010] In order to laminate the decorative sheet of the present invention on these adhered substrates, the decorative sheet is adhered through an adhesive layer, or is laminated using screws, nails, metal fittings, or the like. Examples of the adhesive include vinyl acetate resin, acrylic resin, two-component curable urethane resin, epoxy resin, urea resin, melamine resin,
A known material made of a resin such as rubber may be used.

As the decorative sheet to be attached to the substrate, a decorative sheet having a decoration treatment applied to a flexible base sheet is used.

As the base sheet, paper such as thin paper, woodfree paper, kraft paper, linter paper, Japanese paper, resin (organic) fiber such as polyester resin, vinylon resin, acrylic resin, glass, quartz, asbestos, carbon, Woven or non-woven fabric made of inorganic fibers such as potassium titanate, paper, woven or non-woven fabric impregnated with acrylic resin, urethane resin, melamine resin, rubber, etc., poly (methyl) acrylate, poly (meta) ) Ethyl acrylate, poly (butyl methacrylate), methyl (meth) acrylate
Acrylic resin such as (meth) acrylic acid-butyl copolymer, (meth) acrylic acid methyl-styrene copolymer and the like (however, (meth) acrylic acid means acrylic acid or methacrylic acid), polyethylene , Polypropylene, polybutene, ethylene-propylene copolymer, ethylene-propylene-butene copolymer, polyolefin such as olefin-based thermoplastic elastomer, polyethylene terephthalate, polybutylene terephthalate, ethylene-terephthalate-isophthalate copolymer, polyester-based heat A resin sheet such as a polyester resin such as a plastic elastomer, polyvinyl chloride, polystyrene, an ABS resin, a polycarbonate resin, or a polyamide resin may be used in a single layer, or a different one of the above may be used in a laminate of two or more layers. it can. The thickness of the base sheet is usually 20 to
It is about 300 μm.

The decoration treatment includes kneading a coloring agent such as a dye or a pigment into a base sheet, forming a pattern printing layer, forming a metal thin film, forming an uneven pattern, and combining two or more of these. Yes, these decoration processes will be described below.

(Kneading of a colorant such as a dye or a pigment into a base material sheet) Examples of the colorant include red iron oxide, cadmium red, graphite, titanium yellow, ultramarine, cobalt blue, carbon black (black), iron black , Inorganic pigments such as titanium white, diantimony trioxide, etc .; organic pigments such as quinacridone red, polyazo red, isoindolinone yellow, benzidine yellow, phthalocyanine blue, and induslen blue; and flaky metal foil powders such as aluminum and brass. Metal pigments, mica coated with titanium dioxide, pearl pigments made of flaky foil powder such as basic lead carbonate, and the like are used alone or as a mixture of two or more thereof.

(Formation of a pattern printing layer) The layer is formed by a known printing method using a known ink. As the ink, a colorant such as a dye and a pigment, and other additives such as an extender, a plasticizer, a surfactant, an antioxidant, and a solvent are used as needed, in a binder resin. .

As the binder resin, cellulose (cellulose) resin, acrylic resin, urethane resin, polyester resin, vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl acetate-maleic acid copolymer, chlorinated polypropylene, A simple substance such as a polyamide resin or a mixture of two or more of them is used.

As the cellulose (cellulose) resin, nitrified cotton (cellulose nitrate), cellulose acetate, cellulose acetate propionate and the like are used.

Examples of the acrylic resin include poly (methyl meth) acrylate, poly (meth) ethyl acrylate, poly (meth) butyl acrylate, methyl (meth) acrylate-butyl (meth) acrylate copolymer, Methyl (meth) acrylate-styrene copolymer, methyl (meth) acrylate-2-hydroxyethyl (meth) acrylate copolymer, methyl (meth) acrylate-butyl (meth) acrylate-(meth) acrylic acid 2 Examples thereof include a hydroxyethyl-styrene copolymer (here, (meth) acrylic acid means acrylic acid or methacrylic acid).

As the urethane resin, a thermoplastic urethane resin or a two-component curable urethane resin is used. 2
The liquid-curable urethane resin comprises a polyol as a main component and a polyvalent isocyanate added thereto as a curing agent (crosslinking agent).

Here, as the polyol, a dihydric or higher alcohol is used, and ethylene glycol, butylene glycol, propylene glycol, acrylic polyol, polyester polyol, polyether polyol, polycarbonate polyol, polyurethane polyol and the like are used.

Examples of the polyvalent isocyanate include 2,4-tolylene diisocyanate, xylene diisocyanate,
Aromatic isocyanates such as naphthalene diisocyanate and diphenylmethane diisocyanate, and aliphatic or alicyclic isocyanates such as 1,6-hexamethylene diisocyanate, isophorone diisocyanate and hydrogenated tolylene diisocyanate are used. Alternatively, adducts of these isocyanates, multimers of these isocyanates, and so-called blocked isocyanates in which these isocyanates are temporarily blocked with alcohol, phenol, or the like can also be used.

The coloring agent is selected from the same ones listed at the time of kneading into the base sheet.

As a printing method, a known printing method such as gravure printing, offset printing, silk screen printing, ink jet printing, transfer printing or the like is used.

The patterns include wood pattern, stone pattern, cloth pattern,
A grain pattern, a tile pattern, a brick pattern, a letter, a geometric pattern, a solid surface, a combination thereof, or the like is used.

(Formation of metal thin film) Aluminum,
Form a metal thin film of chromium, brass, gold, silver, copper, etc. The metal thin film may be provided on the entire surface or partially in a pattern.

(Formation of concavo-convex pattern)
It is formed by a method such as hairline processing. As the uneven pattern, wood channel groove, sand grain, granite cleavage surface unevenness, joint groove such as tiled or brickwork, texture (texture),
A satin, a hairline, a linear groove, a skin squeezer, and the like are used.

On the decorative sheet, if necessary, a surface protective layer can be provided for surface protection or surface gloss adjustment. The surface protective layer is formed by applying a paint or laminating a sheet formed in advance. The thickness of the surface protective layer is usually about 1 to 100 μm.

As the paint for the surface protective layer, any of a thermosetting resin, an ionizing radiation-curable resin, and a thermoplastic resin can be used.

As the thermosetting resin, 2 as described above is used.
Liquid-curable urethane resins, unsaturated polyester resins, epoxy resins, amino alkyd resins and the like are used.

Examples of the ionizing radiation-curable resin include a monomer or prepolymer having a (meth) acryloyl group in the molecule (where the (meth) acryloyl group means an acryloyl group or a methacryloyl group). A composition in which one kind of a saturated polyester resin or an epoxy resin is used alone, or a mixture of two or more kinds is used.

Examples of the monomer include diethylene glycol (meth) acrylate, 1,6-hexanediol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta ( (Meth) acrylate, dipentaerythritol hexa (meth) acrylate and the like are used.

As the prepolymer, polyester (meth) acrylate, urethane (meth) acrylate, epoxy (meth) acrylate, melamine (meth)
Acrylate, triazine (meth) acrylate, silicon (meth) acrylate and the like are used.

In the case where visible light or ultraviolet light is used as the ionizing radiation, a photopolymerization initiator is added to these compositions in an amount of 0.1%.
About 10% by mass. As the photopolymerization initiator, a monomer or prepolymer having a (meth) acryloyl group in the molecule, or in the case of an unsaturated polyester resin, acetophenone, benzophenone, thioxanthone, benzoate or the like is used.

In the case of an epoxy resin, aromatic sulfonium salts, aromatic iodonium salts, metallocenes and the like are used.

As the ionizing radiation, ultraviolet light, visible light,
Electromagnetic waves such as X-rays, charged particle beams such as electron beams, etc. are used, but usually ultraviolet rays or electron beams are often used.

As the thermoplastic resin, acrylic resin, vinyl chloride-vinyl acetate copolymer, cellulosic resin, polyolefin resin and the like are used.

In order to enhance the wear resistance of the surface protective layer,
Inorganic particles and / or lubricants having a higher hardness than the resin may be added to the resin of the surface protective layer.

The inorganic particles are selected from materials such as alumina (aluminum oxide) such as α-alumina, silica (silicon dioxide), boron carbide, silicon carbide, diamond (goldstone), glass, and calcium carbonate. Note that the inorganic particles having a higher hardness than the resin of the surface protective layer means that when the resin and the inorganic particles are rubbed against each other, the resin is damaged and the inorganic particle side is damaged. It means combining things that have no relation to each other. The hardness may be evaluated by an appropriate measuring method such as Mohs hardness, universal hardness, Vickers hardness and the like. Also, if necessary, the surface of the particles of these materials is treated with a silane coupling agent,
The adhesive strength with the resin can also be improved.

The shape of the inorganic particles includes tetrahedron, hexahedron (cube, parallelepiped, etc.), polyhedron such as octahedron, sphere, spheroid, scale, etc.

The average particle diameter of the inorganic particles is usually 2 to 2.
Although it is about 200 μm, preferably, the relationship between the thickness t of the surface protective layer and the average particle diameter d of the inorganic particles is selected so that 0.3t ≦ d ≦ 2.0t. With this setting, it is possible to achieve both the wear resistance of the surface protective layer and the prevention of wear of other articles in contact with the surface protective layer.

Assuming that the value of the film thickness t is fixed first,
If 3t> d, sufficient abrasion resistance cannot be obtained on the surface protective layer. When d> 2.0 t, the inorganic particles protruding from the surface cause an increase in hardening of the articles in contact with the surface protective layer, such as shoe soles, socks, and furniture.
In addition, since the inorganic particles easily fall off due to other articles in contact with the surface protection layer, the wear resistance of the surface protective layer itself cannot be obtained as expected.

The amount of addition of the inorganic particles is about 5 to 30% by mass. If the amount is less than the lower limit, sufficient wear resistance cannot be obtained. On the other hand, if the amount exceeds the upper limit, the surface protective layer becomes brittle and the depressing resistance decreases. In addition, the surface roughness increases, and other articles in contact with the surface protective layer are easily worn.

As the lubricant, waxes such as wax and montan wax, fluorine resin, silicone resin and the like are used.

In addition, if necessary, in the surface protective layer,
Various additives such as an ultraviolet absorber, a light stabilizer, a matting agent (matting agent), a coloring agent, a plasticizer, and an antioxidant can be added.

In order to manufacture the decorative board of the present invention, a decorative sheet is adhered only to the top surface, which is the surface portion on the substrate, and the decorative sheet is left unadhered on both side end portions to be a surplus portion. Such a sticking process is performed using a processing device as shown in FIG. In this apparatus, an adhesive is applied only to the top surface Ft of the substrate 2 moving on the transport roller 4 as shown in the figure by spray coating, brush coating, curtain flow coating or the like (not shown). Then, the decorative sheet 3 is wider by a predetermined amount than the substrate 2 carried in from above, so that the back surface thereof faces the substrate 2 and the width of the surplus portions 3a on both sides of the decorative sheet 3 becomes equal. The decorative sheet 3 is adhered only to the top surface portion Ft of the substrate 2 by adjusting the position in such a manner as to oppose each other and applying pressure with the pressing roller 5.

As the pressure roller 5, a cylindrical roller having a rigid rotating shaft made of iron or the like covered with an elastic material such as silicone rubber or natural rubber is used. Although not shown, the rotary shaft of the pressure roller is connected to a power source such as an electric motor to be driven to rotate, and a desired pressure is applied by a mechanism such as a hydraulic cylinder. The surface of the substrate (top surface Ft)
In the case where is a rough surface or has an uneven shape, the elastic body of the pressure roller 5 is made of a soft material.

As shown in FIGS. 1 and 2, the decorative board 1 of the present invention is attached to the surplus portion 3a of the decorative sheet 3, that is, the top face Ft of the substrate 2, at both end portions Eb, Eb of the substrate 2. The decorative sheet 3 has portions extended at both side ends of the substrate 2. The surplus portion 3a is in a non-adhered (non-adhered) state with both end surfaces Fs of the substrate 2. The extension length of the surplus portion 3a (the distance from the substrate-side end Eb to the decorative sheet-side end Es) is in a range of not less than １ ／ of the thickness of the substrate 2 and not more than 2.5 times.

The decorative board of the present invention is shipped from a factory in a state where an adhesive is not applied to a surplus portion of the decorative sheet. Then, when applied to a wall surface or the like, an adhesive is applied to the back surface of the surplus portion as necessary, and the decorative sheet is bonded to the base material (adherend) and / or the end face on the substrate side.

A typical and suitable use of the decorative board of the present invention is as interior and exterior materials for buildings. As interior materials,
It is suitably used for walls, floors, ceilings and the like. As exterior materials,
It is suitably used for outer walls, walls, doors and the like. When used as an interior material and an exterior material, they are laminated on a base material (usually made of wood, gypsum, cement, calcium silicate, metal, etc.). In this case, an adhesive, a nail, a screw, etc. They are used and laminated, and are arranged and arranged in an appropriate mutual positional relationship.

The decorative panel of the present invention can be used not only as interior materials and exterior materials, but also as surface materials for kitchen appliances such as bay window counters and sinks, interior materials such as bathrooms, furniture such as desks, dining tables and chests, and frame doors. It can also be used for applications such as surface materials such as doors.

In the application, the entire surface of the base substrate may be covered, or the surface may be partially covered. As an example of partial covering, there is a case where the base material is a wall surface and covers the waist wall portion or the knee wall portion.

FIGS. 3 and 4 show typical construction forms.
As shown in the figure, when the decorative board 1 is adhered to the base material B (adhering surface) via the adhesive layer N, the
There is a form in which joint grooves H are formed between the decorative boards by separating the side end faces from each other by a predetermined distance, and the joint grooves thus formed are parallel to each other.
This will be referred to as parallel joint application. As another construction form, as shown in FIG. 5, there is a form in which opposing side end faces of the adjacent decorative boards 1 are closely contacted with each other. This will be referred to as butting work.

In the case of parallel joint application, as shown in FIG. 3, the back surface of the surplus portion 3a of the decorative sheet 3 and the substrate 2
An adhesive is applied to at least one of the side end surfaces of the base material 2 or a double-sided adhesive tape is applied, and then the excess portion 3 a of the decorative sheet 3 is bonded to the side end surface of the substrate 2. Then, if necessary, the surplus portion 3a is further adhered to the base material B.
At this time, if necessary, the extension length of the surplus portion 3a may be reduced to an appropriate size. By doing so, the side end surface of the substrate 2 or the decorative sheet 3 is not exposed at the joint portion, and the appearance becomes unpleasant.

Preferably, as shown in FIG. 4, a joint holding plate C in the form of a bar (or bar) having the same width as the joint groove H is inserted into the joint groove H to make up the joint. At the same time, it prevents the surplus portion 3a of the decorative sheet 3 from peeling or rolling up. The material of the joint holding plate C is selected from the same materials as the substrate such as wood. Moreover, you may give a desired decoration process to the surface as needed.

In the case of the butting work, as shown in FIG. 5, the back surface of the surplus portion 3a of the decorative sheet 3 and the substrate 2
An adhesive is applied to at least one of the side end surfaces of the base material 2 or a double-sided adhesive tape is applied, and then the excess portion 3 a of the decorative sheet 3 is bonded to the side end surface of the substrate 2. Then, if necessary, the surplus portion 3a is folded back and adhered to the back surface side of the substrate 2 as shown in FIG. This prevents the side of the decorative sheet 3 from being exposed at the abutting portion, resulting in an unsightly appearance, or the decorative sheet from peeling and rolling up.

[0056]

EXAMPLE In this example, a decorative board in which a wood-grained decorative sheet was bonded to a substrate made of MDF was used, and a waist wall was formed by parallel joint bonding (FIG. 3). Details are as follows.

First, a substrate made of MDF (woody medium-density fiberboard) having a width of 1200 mm, a length (height after construction) of 1000 mm, and a thickness of 5.5 mm, and a yellow-brown colored opaque polypropylene-based material A two-component curable urethane resin is used as a binder on the surface of a base material sheet made of a thermoplastic elastomer, and a stencil, a decorative sheet obtained by gravure printing a grain pattern with an ink containing carbon black as a main component are prepared.
A decorative sheet was attached to the top surface of the substrate.

This bonding was carried out by using a processing apparatus as shown in FIG. 2 and pressing with a pressure roller in which silicon rubber was coated around the iron rotation axis. At this time, as the decorative sheet, the width is 1220 mm and the length (height after construction) is 1
A 000 mm single wafer was prepared, the length direction was matched with the substrate, and the substrates were bonded together with 10 mm left over on both sides in the width direction. A vinyl acetate resin emulsion was used as an adhesive for bonding.

The decorative board thus obtained was temporarily fixed to the base material on the wall surface with an adhesive tape and bonded together using a vinyl acetate resin emulsion adhesive. At that time, a gap of 6 mm was left in the width direction of the decorative board.

A surplus portion of the decorative sheet is fitted with a bar having a width of 6 mm and a thickness of 2.5 mm, and is pressed down with a double-sided tape or an adhesive. Since the area directly touching the base material is reduced and the adhesive strength between the bar and the base material is insufficient, the end of the surplus portion is set to 2.
It was cut at a width of about 5 mm.

[0061]

The decorative board of the present invention is a decorative board in which a decorative sheet is bonded to the surface of a substrate, and the side edges of the decorative sheet are not bonded to the side edges of the substrate at both side edges of the substrate. Since it is characterized by being extended in the state and becoming a surplus part, it is a flat upholstery that sticks the decorative sheet only to the top surface of the substrate, eliminating the need for large-scale facilities such as lapping machines and reducing manufacturing costs Can be suppressed. Also,
Production speed and yield are also improved.

In the case where the decorative board is applied on the base material on the wall surface, in the case of parallel joint bonding, a bar material thinner than the substrate is inserted into the joint groove between the substrates as a joint holding plate, and the joint holding is performed. Easy construction is possible by laying the surplus part of the decorative sheet on the back surface of the board. In addition, in the case of applying the decorative board by abutting, the peeling of the sheet from the decorative board edge can be prevented by wrapping the decorative sheet remaining on the end portion on the back surface of the decorative sheet and bonding it together with the base material to perform the application. . In any case, neither the decorative sheet side end surface nor the substrate side end surface is conspicuous in the vicinity of the side end of the decorative board.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a decorative board according to the present invention.

FIG. 2 is a schematic configuration diagram illustrating an example of a processing apparatus used to manufacture the decorative board of the present invention in an operating state.

FIG. 3 is an explanatory diagram of parallel joint application.

FIG. 4 is an explanatory view in the case where a joint holding plate is used in parallel joint bonding.

FIG. 5 is an explanatory diagram of a butting work.

FIG. 6 is a schematic configuration diagram showing the lapping machine in an operating state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Decorative board 2 Substrate 3 Decorative sheet 3a Excess part 4 Conveyance roller 5 Pressure roller B Base material C Joint holding plate N Adhesive layer H Joint groove

Continued on the front page F-term (reference) 2B002 AA01 AA16 BA01 2B250 AA06 BA05 CA11 DA03 FA28 GA05 HA01 2E110 AA42 AA57 AB03 AB04 AB05 AB22 AB23 BA02 BA12 BB02 BB04 BB22 CA03 DA12 DC12 DC21 EA06 EA09 GA24X GA32W GAX GBX GB32 GBX32 GB19W GB23X GB28X GB32W GB32X GB35W GB44W GB44X GB46W GB46X GB49X GB52W GB54W GB62X GB63W 4F100 AK07 AK22G AL09 AP03 AT00A BA02 DB16B EC18 GB08 HB00B HB01 HB31 JB16 JK06 JL02 JL01 JL02 JL05 JL10

Claims (1)

[Claims] 1. A decorative plate in which a decorative sheet is bonded to a surface of a substrate, wherein a side edge of the decorative sheet is extended from both side edges of the substrate in a state of being unbonded from a side edge of the substrate, and a surplus portion. A decorative plate characterized by becoming.