JP4585354B2 - Decorative sheet and decorative board - Google Patents

Description

  The present invention is a decorative sheet having a surface protective layer obtained by crosslinking and curing an electron beam curable resin composition, and uses a paper-based base material as a base material. There is no makeup sheet.

As an effective method for laminating and sticking a decorative sheet printed with a pattern or pattern on the outer surface of a substrate, there is a vacuum press lamination molding method. According to the vacuum press laminate molding method, air does not remain between the substrate and the decorative sheet, and a good quality laminate molded product can be efficiently produced (see Patent Document 1). In such a vacuum press lamination molding method, the decorative sheet is brought into close contact with the substrate by being in a vacuum state, but the decorative sheet may be stretched and broken at that time. This is particularly noticeable when a paper-based substrate is used.
On the other hand, decorative sheets using paper-based base materials are necessary to obtain the texture and texture of paper, and tearing occurs even in the high-pressure, vacuum-press laminate molding method based on paper-based base materials. No decorative sheet was desired.

Japanese Patent Laid-Open No. 5-31743

  An object of the present invention is to provide a decorative sheet using a paper-based substrate, which has a high strength and is suitable for a vacuum press lamination molding method.

  As a result of intensive studies to achieve the above object, the inventors of the present invention consisted of a paper layer composed of a plurality of paper-based base materials as a base material and a polyolefin film sandwiched between the paper layers. It has been found that the above problem can be solved by controlling the Young's modulus within a specific range. The present invention has been completed based on such findings.

That is, the present invention
(1) A decorative sheet having a pattern layer and / or a colored layer and a surface protective layer on a substrate, wherein the surface protective layer is obtained by crosslinking and curing the electron beam curable resin composition, A decorative sheet comprising a paper layer comprising a plurality of paper-based substrates and a polyolefin film sandwiched between the paper layers, wherein the Young's modulus of the substrate is 800 to 1400 MPa,
(2) The decorative sheet according to (1), wherein the polyolefin film is crosslinked and cured by irradiation with an electron beam,
(3) The decorative sheet according to (2), wherein the polyolefin film is high-density polyethylene,
(4) The decorative sheet according to any one of the above (1) to (3), wherein the basis weight of the plurality of paper-based base materials constituting the paper layer is 18 to 40 g / m ² , respectively.
(5) A decorative board in which the decorative sheet according to any one of (1) to (4) is attached to a substrate, and (6) the decorative board according to (5), wherein the application is performed by a vacuum press lamination molding method.
Is to provide.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is a decorative sheet using a paper-type base material, the intensity | strength is high and can provide the decorative sheet suitable for a vacuum press lamination molding method.

The base material used in the decorative sheet of the present invention comprises a paper layer composed of a plurality of paper-based base materials and a polyolefin film layer sandwiched between the paper layers, and the Young's modulus of the base material is 800 to 1400 MPa. And
The base material in the present invention is one in which a polyolefin film is sandwiched and integrated with a paper layer composed of at least two paper-based base materials. The paper-based base material constituting the paper layer is not particularly limited, but inter-paper reinforcing paper or impregnated paper is preferable from the viewpoint of ensuring strength. Moreover, it is preferable that the basic weight of each paper-type base material is 18-40 g / m < ² >. When it is 18 g / m ² or more, when the decorative sheet of the present invention is affixed to a substrate such as a wooden substrate, a sufficient shielding property of the wooden substrate or the like can be obtained, while on the other hand, it is 40 g / m ² or less. When it exists, the followability at the time of shaping | molding bending is favorable.
The at least two layers of paper-based substrates may be the same or different from each other, but are preferably the same for manufacturing purposes.

The polyolefin film used in the present invention is not particularly limited as long as the effects of the present invention are achieved, but a resin that is crosslinked and cured by irradiation with an electron beam is preferable. In the decorative sheet of the present invention, as the surface protective layer described in detail later, a cross-linked and hardened electron beam curable resin composition is used, and when this is cured by electron beam irradiation, the polyolefin film is also used. Crosslinking and curing can further increase the strength of the substrate.
Specific examples of the polyolefin film used in the present invention include ethylene homopolymers such as low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), and linear low density polyethylene (LLDPE). Resin; ethylene-vinyl acetate copolymer resin (EVA), ethylene-methyl acrylate copolymer resin (EMA), ethylene-ethyl acrylate copolymer resin (EEA), ethylene and alkyl acrylate having 3 to 5 carbon atoms Polyethylene copolymer resins such as copolymer resins, ethylene-methyl methacrylate copolymer resins (EMMA), and ethylene-propylene copolymer resins; propylene copolymer resins such as homo- or copolymerized polypropylene and chlorinated polypropylene Also, a mixture of these resins And the like. Among these, high-density polyethylene is most preferable because sufficient crosslinking strength can be obtained by electron beam irradiation. Here, the high density polyethylene refers to polyethylene having a density of 0.941 g / cm ³ or more.

  The thickness of the polyolefin film is not particularly limited as long as the effects of the present invention are obtained, but is usually in the range of 15 to 30 μm. When the thickness is 15 μm or more, sufficient strength can be given to the substrate, while when it is 30 μm or less, the followability at the time of forming and bending is good.

  The base material of the present invention has a Young's modulus in the range of 800 to 1400 MPa. If the Young's modulus is 800 MPa or more, it has sufficient strength as a substrate and will not be broken even when used in vacuum press lamination molding. On the other hand, when the Young's modulus is 1400 MPa or less, when the decorative sheet of the present invention is flattened on a wooden substrate or the like, it is possible to suppress the uneven shape derived from the fiber of the substrate from appearing on the decorative sheet. From the above viewpoint, the Young's modulus is more preferably in the range of 800 to 1200 MPa.

As described above, the substrate of the present invention is obtained by integrating a polyolefin film with a paper layer composed of a paper-based substrate. The method for producing the substrate is not particularly limited, and various methods can be used. For example, a method in which a polyolefin film and a paper-based substrate are bonded with an adhesive, a polyolefin film and a paper-based substrate are heated. There are a method of fusing by two methods, a method in which a polyolefin film is melt-extruded and laminated at the same time by extrusion lamination to two paper-based substrates, and the method is appropriately selected depending on the type of polyolefin film.
Of these, the extrusion laminating method is efficient because it requires fewer steps.

Hereinafter, the configuration of the decorative sheet of the present invention will be specifically described with reference to FIG. FIG. 1 is a schematic view showing a cross section of a decorative sheet 1 of the present invention. In the example shown in FIG. 1, a uniform and uniform colored layer 3, a pattern layer 4, a primer layer 5, and a surface protective layer 6 obtained by crosslinking and curing an ionizing radiation curable resin composition are coated on the substrate 2. They are stacked in order.
The substrate 2 shown in FIG. 1 includes paper-based substrates 21 and 23 and a polyolefin film 22 sandwiched between the paper-based substrates.

The uniform and uniform colored layer 3 covered over the entire surface shown in FIG. 1 is also referred to as a concealing layer or a full surface solid layer provided as desired for the purpose of improving the design of the decorative material of the present invention. The intended color is given to the surface of the substrate 2. Usually, it is formed with an opaque color, but it may be formed with a colored transparent color to make use of the pattern of the base. When making use of the fact that the base material 2 is white, or when the base material 2 itself is appropriately colored, it is not necessary to form the colored layer 3.
As the ink used for forming the colored layer, an ink in which a binder, a colorant such as a pigment or a dye, an extender pigment, a solvent, a stabilizer, a plasticizer, a catalyst, or a curing agent is appropriately mixed is used. The binder is not particularly limited, and examples thereof include polyurethane resins, vinyl chloride / vinyl acetate copolymer resins, vinyl chloride / vinyl acetate / acrylic copolymer resins, chlorinated polypropylene resins, acrylic resins, and polyesters. Arbitrary resins, polyamide resins, butyral resins, polystyrene resins, nitrocellulose resins, cellulose acetate resins and the like may be used alone or in combination of two or more.
Colorants include carbon black (black), iron black, titanium white, antimony white, yellow lead, titanium yellow, petal, cadmium red, ultramarine, cobalt blue and other inorganic pigments, quinacridone red, isoindolinone yellow, phthalocyanine Organic pigments or dyes such as blue, metallic pigments composed of scaly foil pieces such as aluminum and brass, pearlescent pigments composed of scaly foil pieces such as titanium dioxide-coated mica and basic lead carbonate, and the like are used.
The colored layer 3 is preferably a so-called solid print layer having a thickness of about 1 to 20 μm.

  The pattern layer 4 shown in FIG. 1 gives decorativeness to the base material 2 and is formed by printing various patterns using ink and a printing machine. As patterns, there are stone patterns imitating the surface of rocks such as wood grain patterns, marble patterns (for example, travertine marble patterns), fabric patterns imitating cloth or cloth patterns, tiled patterns, brickwork patterns, etc. There are also patterns such as marquetry and patchwork that combine these. These patterns are formed by multicolor printing with the usual yellow, red, blue and black process colors, as well as by multicolor printing with special colors prepared by preparing the individual color plates that make up the pattern. Is done. As the pattern ink used for the pattern layer 4, the same ink as that used for the colored layer 3 can be used.

  The primer layer 5 shown in FIG. 1 is a layer provided as desired, and has a function of suppressing the penetration of the electron beam curable resin constituting the surface protective layer 6 into the paper-based substrate 23. It is. In addition, the surface of the colored layer 3 and the pattern layer 4 on the substrate 2 is smoothed, and the function of improving the adhesion with the surface protective layer 5 is also achieved.

Next, the surface protective layer 6 is composed of a material obtained by crosslinking and curing the electron beam curable resin composition as described above. Here, the electron beam curable resin composition refers to a resin composition that crosslinks and cures when irradiated with an electron beam. Specifically, it can be appropriately selected from polymerizable monomers, polymerizable oligomers, or prepolymers conventionally used as electron beam curable resin compositions.
Typically, a (meth) acrylate monomer having a radical polymerizable unsaturated group in the molecule is suitable as the polymerizable monomer, and among them, a polyfunctional (meth) acrylate is preferable. Here, “(meth) acrylate” means “acrylate or methacrylate”. The polyfunctional (meth) acrylate is not particularly limited as long as it is a (meth) acrylate having two or more ethylenically unsaturated bonds in the molecule. Specifically, ethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) ) Acrylate, polyethylene glycol di (meth) acrylate, hydroxypivalate neopentyl glycol di (meth) acrylate, dicyclopentanyl di (meth) acrylate, caprolactone modified dicyclopentenyl di (meth) acrylate, ethylene oxide modified diphosphate ( (Meth) acrylate, allylated cyclohexyl di (meth) acrylate, isocyanurate di (meth) acrylate, trimethylolpropane tri (meth) acrylate, ethylene oxide modified trimethylo Propane tri (meth) acrylate, dipentaerythritol tri (meth) acrylate, propionic acid modified dipentaerythritol tri (meth) acrylate, pentaerythritol tri (meth) acrylate, propylene oxide modified trimethylolpropane tri (meth) acrylate, tris ( Acryloxyethyl) isocyanurate, propionic acid modified dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, ethylene oxide modified dipentaerythritol hexa (meth) acrylate, caprolactone modified dipentaerythritol hexa (meth) acrylate, etc. Is mentioned. These polyfunctional (meth) acrylates may be used singly or in combination of two or more.

  In the present invention, a monofunctional (meth) acrylate can be used in combination with the polyfunctional (meth) acrylate as long as the object of the present invention is not impaired, for the purpose of lowering the viscosity. Examples of monofunctional (meth) acrylates include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, cyclohexyl ( Examples include meth) acrylate, 2-ethylhexyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, and isobornyl (meth) acrylate. These monofunctional (meth) acrylates may be used alone or in combination of two or more.

  Next, as the polymerizable oligomer, an oligomer having a radical polymerizable unsaturated group in the molecule, for example, epoxy (meth) acrylate, urethane (meth) acrylate, polyester (meth) acrylate, polyether (meth) acrylate The system etc. are mentioned. Here, the epoxy (meth) acrylate oligomer can be obtained, for example, by reacting (meth) acrylic acid with an oxirane ring of a relatively low molecular weight bisphenol type epoxy resin or novolak type epoxy resin and esterifying it. . Further, a carboxyl-modified epoxy (meth) acrylate oligomer obtained by partially modifying this epoxy (meth) acrylate oligomer with a dibasic carboxylic acid anhydride can also be used. The urethane (meth) acrylate oligomer can be obtained, for example, by esterifying a polyurethane oligomer obtained by reaction of polyether polyol or polyester polyol and polyisocyanate with (meth) acrylic acid. Examples of polyester (meth) acrylate oligomers include esterification of hydroxyl groups of polyester oligomers having hydroxyl groups at both ends obtained by condensation of polycarboxylic acid and polyhydric alcohol with (meth) acrylic acid, It can be obtained by esterifying the terminal hydroxyl group of an oligomer obtained by adding an alkylene oxide to a carboxylic acid with (meth) acrylic acid. The polyether (meth) acrylate oligomer can be obtained by esterifying the hydroxyl group of the polyether polyol with (meth) acrylic acid.

  Furthermore, other polymerizable oligomers include polybutadiene (meth) acrylate oligomers with high hydrophobicity that have (meth) acrylate groups in the side chain of polybutadiene oligomers, and silicone (meth) acrylate oligomers that have polysiloxane bonds in the main chain. In a molecule such as an aminoplast resin (meth) acrylate oligomer modified with an aminoplast resin having many reactive groups in a small molecule, or a novolak epoxy resin, bisphenol epoxy resin, aliphatic vinyl ether, aromatic vinyl ether, etc. There are oligomers having a cationic polymerizable functional group.

In order to impart surface specularity and magic erasability to the electron beam curable resin composition in the present invention, a silicone-based additive can be added. This is because a paper-based substrate is used as the substrate. That is, for example, when storing the decorative sheet of the present invention in a roll shape, since the paper-based base material is in contact with the surface protective layer, even if silicone partially migrates to the paper-based base material, it will be described later. There is no problem of peeling after being molded by a vacuum press lamination molding method or the like. On the other hand, when only the strength of the base material is obtained and a plastic base material is used as the base material, there arises a problem of peeling after molding due to the transfer of silicone as described above.
Although it does not specifically limit as a silicone type additive, Monofunctional or bifunctional or more functional silicone (meth) acrylate is preferable.

  Moreover, various additives can be mix | blended with the electron beam curable resin composition in this invention according to the desired physical property of the cured resin layer obtained. Examples of this additive include a weather resistance improver, an abrasion resistance improver, a polymerization inhibitor, a crosslinking agent, an infrared absorber, an antistatic agent, an adhesion improver, a leveling agent, a thixotropic agent, a coupling agent, A plasticizer, an antifoamer, a filler, a solvent, a coloring agent, etc. are mentioned.

In the present invention, the polymerizable monomer and polymerizable oligomer, which are the electron beam curing components, and various additives are homogeneously mixed at predetermined ratios to prepare a coating liquid comprising an electron beam curable resin composition. To do. The viscosity of the coating solution is not particularly limited as long as it is a viscosity capable of forming an uncured resin layer on the surface of the substrate by a coating method described later.
In the present invention, the coating liquid prepared in this way is applied to the surface of the substrate so that the thickness after curing is 1 to 20 μm, gravure coating, bar coating, roll coating, reverse roll coating, Coating is performed by a known method such as comma coating, preferably gravure coating, to form an uncured resin layer. When the thickness after curing is 1 μm or more, a cured resin layer having a desired function is obtained. The thickness of the surface protective layer after curing is preferably about 2 to 20 μm.

In the present invention, the uncured resin layer thus formed is irradiated with an electron beam to cure the uncured resin layer. Here, the acceleration voltage of the electron beam is appropriately selected according to the resin used and the thickness of the layer. Since the transmission capability increases as the acceleration voltage of the electron beam increases, the acceleration voltage is set so that the transmission depth of the electron beam and the thickness of the resin layer are substantially equal in consideration of deterioration due to the electron beam of the paper-based substrate. By selecting this, it is possible to suppress the irradiation of the electron beam to the base material, and to minimize the deterioration of the base material due to the excess electron beam. Specifically, the acceleration voltage is selected in the range of 30 to 300 kV.
Further, the irradiation dose is preferably an amount that saturates the crosslinking density of the resin layer, and is usually selected in the range of 5 to 300 kGy, preferably 10 to 100 kGy, and further 30 to 50 kGy.

  The electron beam source is not particularly limited, and for example, various electron beam accelerators such as a cockroft Walton type, a bandegraft type, a resonant transformer type, an insulated core transformer type, a linear type, a dynamitron type, and a high frequency type are used. be able to.

  The cured resin layer thus formed has various functions by adding various additives, for example, a so-called hard coat function, anti-fogging coat function, and anti-fouling coat having high hardness and scratch resistance. A function, an antiglare coating function, an antireflection coating function, an ultraviolet shielding coating function, an infrared shielding coating function, and the like can also be imparted.

The decorative material of the present invention can be used as a decorative plate by sticking to various substrates. The board | substrate used as a to-be-adhered body is not specifically limited, A plastic board, a metal board, woody board | plates, such as a timber, a ceramic material, etc. can be selected suitably according to a use. When these substrates, particularly plastic sheets, are used as substrates, physical or chemical surface treatment such as oxidation or unevenness is applied to one or both sides as desired in order to improve adhesion to the decorative material. Can be applied.
Examples of the oxidation method include corona discharge treatment, chromium oxidation treatment, flame treatment, hot air treatment, ozone / ultraviolet treatment method, and examples of the unevenness method include a sand blast method and a solvent treatment method. These surface treatments are appropriately selected according to the type of the substrate, but in general, the corona discharge treatment method is preferably used from the viewpoints of effects and operability.

  As a plastic sheet, what consists of various synthetic resins is mentioned. Synthetic resins include polyethylene resin, polypropylene resin, polymethylpentene resin, polyvinyl chloride resin, polyvinylidene chloride resin, polyvinyl alcohol resin, vinyl chloride-vinyl acetate copolymer resin, ethylene-vinyl acetate copolymer resin, ethylene-vinyl. Representative examples include alcohol copolymer resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyethylene naphthalate-isophthalate copolymer resin, polymethyl methacrylate resin, polyethyl methacrylate resin, polybutyl acrylate resin, nylon 6 or nylon 66 And polyamide resin, cellulose triacetate resin, cellophane, polystyrene resin, polycarbonate resin, polyarylate resin, polyimide resin, and the like.

As a metal plate, what consists of aluminum, iron, stainless steel, or copper, for example can be used, and what gave these metals by plating etc. can also be used.
Examples of wood-based boards include veneer of various materials such as cedar, firewood, firewood, pine, lawan, teak and melapie, and wood materials such as wood veneer, wood plywood, particle board, and medium density fiber board (MDF). . These can be used alone or in a laminated manner. The wooden board includes not only a wooden board but also a plastic board containing paper powder and reinforced paper having strength.
Examples of the ceramic material include ceramic building materials such as a gypsum plate, a calcium silicate plate, and a wood piece cement plate, ceramics, glass, firewood, fired tiles, plates made mainly of volcanic ash, and the like.
In addition to these, composites of various materials such as a fiber reinforced plastic (FRP) plate, a paper honeycomb on which both sides of an iron plate are attached, and a polyethylene resin sandwiched between two aluminum plates can be used as the substrate.

  The decorative sheet of the present invention is particularly preferably used for vacuum press lamination molding, and is pressed using a sticking device such as a vacuum press to adhere the decorative sheet to the substrate surface to obtain a decorative board. Since the decorative sheet of the present invention has a high base material strength, it is not broken even in vacuum press lamination molding. Therefore, the design feeling of the paper-based substrate can be achieved even by vacuum press lamination molding.

  The decorative board manufactured as described above is also optionally cut by the decorative board, and optionally decorated such as grooving and chamfering on the surface and the mouth using a cutting machine such as a router or a cutter. Can be applied. And various uses, for example, interior or exterior materials of buildings such as walls, ceilings, floors, window frames, doors, handrails, skirting boards, margins, surface decorative boards for fittings such as malls, kitchens, furniture or light electrical appliances, It can be used for a surface decorative plate of a cabinet such as an OA device, an interior or exterior of a vehicle.

EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by this example.
(Evaluation methods)
The Young's modulus E was determined by the following formula from the elongation when a load was applied to the sample piece.
E = (W × L) / (A × Δt)
Here, W is the load (kg), L is the distance between the marked lines before the test (cm), A is the cross-sectional area of the test piece, and Δt is the distance between the marked lines at the load W (cm). The shape of the sample used was a sample length of 3.5 cm and a sample width of 0.65 cm.

Example 1
(1) between the inter-sheet reinforced paper 21 and the basis weight 30 g / m ² paper between reinforced paper 23 of producing a substrate having a basis weight 23 g / m ^2, high density polyethylene 22 (density; 0.95 g / cm ³ ) Was sandwiched so that the thickness of the polyethylene film was 40 μm, and a base material having a three-layer structure was obtained by the extrusion laminating method. The total thickness of the substrate was 100 μm. Moreover, when the Young's modulus was measured by the said method, it was 845 MPa.
(2) Manufacture of decorative sheet A coating amount of 20 g / in, using an ink containing acrylic resin and nitrified cotton as a binder on one side of the base material 2 manufactured by the above method and titanium white, petal, and chrome lead as colorants. The colored layer 3 was formed by gravure printing on the m ² (full surface) layer. Subsequently, using a coating composition having a polyisocyanate composed of a polyester urethane resin having a number average molecular weight of 20,000 and a glass transition temperature (Tg) of −59.8 ° C. and tolylene diisocyanate as a binder, the coating amount is 3 g / m. ^Then , the primer layer 5 was formed by gravure printing on the entire surface.
On this primer layer 5, 60 parts by mass of ethylene oxide-modified trimethylolpropane ethylene oxide triacrylate, which is a trifunctional acrylate monomer, 40 parts by mass of dipentaerythritol hexaacrylate, which is a hexafunctional acrylate monomer, and a silica having an average particle diameter of 5 μm An electron beam curable resin composition composed of 2 parts by mass of particles and 1 part by mass of a silicone acrylate prepolymer was applied at a coating amount of 5 g / m ² by a gravure offset coater method. After the coating, an electron beam with an acceleration voltage of 175 kV and an irradiation dose of 50 kGy (5 Mrad) was irradiated to cure the electron beam curable resin composition to obtain the surface protective layer 5. Next, curing was performed at 70 ° C. for 24 hours to obtain a decorative sheet.
Using the decorative sheet, the decorative sheet was closely laminated on the substrate MDF (plywood) by a vacuum press lamination molding method. In vacuum press molding, after applying vinyl acetate adhesive to MDF that has been 3D decorated by router processing in advance and sufficiently evaporating water, molding is performed with a vacuum press machine under the following conditions: Went.
Temperature: Heater upper part 100 ° C (membrane part), heater lower part 55 ° C
Evacuation time: 70 seconds A decorative board in which air was not trapped between the substrate and the decorative sheet could be produced without tearing the decorative sheet of the present invention.

Example 2
High-density polyethylene 22 (density: 0.95 g / cm ³ ) is sandwiched between two sheets of reinforcing paper 21 and 23 having a basis weight of 23 g / m ² so that the thickness of the polyethylene film is 25 μm. A decorative sheet was obtained in the same manner as in Example 1 except that a three-layer base material was obtained by the extrusion laminating method. The total thickness of the substrate was 74 μm. Moreover, it was 1179 Mpa when the Young's modulus was measured by the said method.
When the molding process was performed in the same manner as in Example 1, it was possible to produce a decorative board in which air was not trapped between the substrate and the decorative sheet without tearing the decorative sheet.

Example 3
A decorative sheet was obtained in the same manner as in Example 2 except that the thickness of the polyethylene film was 15 μm. The total thickness of the substrate was 66 μm. The Young's modulus was measured by the above method and found to be 1338 MPa.
When the molding process was performed in the same manner as in Example 1, the smoothness was somewhat inferior reflecting the fine irregularities of the base material, but the decorative sheet was not torn and air was bit between the substrate and the decorative sheet. We were able to produce a decorative veneer.

Comparative Example 1
A decorative board was produced in the same manner as in Example 1 except that a paper-reinforced paper having a basis weight of 30 g / m ² and a Young's modulus of 7000 MPa was used as the base material, and was similarly evaluated. A part of the decorative sheet was torn and the decorative plate could not be manufactured.

  According to the present invention, even a decorative sheet using a paper-based base material can provide a decorative sheet that has high strength and is suitable for the vacuum press lamination molding method, and has the texture and design feeling of the paper-based base material. A cosmetic material with excellent surface properties such as contamination resistance and wear resistance can be obtained without damage, and is suitable for applications such as interior materials for buildings such as walls, surface materials for furniture such as doors and furniture, etc. Used.

It is a schematic diagram which shows the cross section of the decorative material of this invention.

Explanation of symbols

1. Cosmetic sheet Base material 21. Paper-based substrate 22. Polyolefin 23. 2. Paper-based substrate 3. Colored layer Pattern layer 5. Primer layer 6. Surface protective layer

Claims (7)

A decorative sheet having a pattern layer and / or a colored layer and a surface protective layer on a base material, the surface protective layer being a cross-linked and hardened electron beam curable resin composition, and the base material has a plurality of paper quality It is composed of a paper layer made of a base material and a polyolefin film sandwiched between the paper layers, the polyolefin film is cross-linked and cured by irradiation with an electron beam, and the Young's modulus of the base material is 800 to 1400 MPa. Characteristic decorative sheet. The decorative sheet according to claim 1 , wherein the polyolefin film is high-density polyethylene. Decorative sheet according to claim 1 or 2 basis weight of the plurality of paper quality based substrate are each 18~40g / m ² constituting the paper layer. The decorative board which stuck the decorative sheet in any one of Claims 1-3 on the board | substrate. The decorative board according to claim 4 , wherein the sticking is performed by a vacuum press lamination molding method. A method for producing a decorative board having the following steps.
Step (1) A step of producing a substrate having a Young's modulus of 800 to 1400 MPa by sandwiching a polyolefin film with a paper layer comprising a plurality of paper-based substrates.
Step (2) Step of providing a pattern layer and / or a colored layer
Step (3) Next, a step of applying an electron beam curable resin composition
Step (4) Step of crosslinking and curing the electron beam curable resin composition and the polyolefin film applied in step (3) by electron beam irradiation The production method according to claim 6, wherein the polyolefin film is high-density polyethylene.

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