JP2002019042A - Decorative paper and decorative material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To upgrade a scratch resistance strength of a surface against a pencil or the like in decorative paper having a surface protective layer of a crosslinking curable resin on base paper or a decorative material such as a decorative plate obtained by adhering the paper on a base material. SOLUTION: The decorative paper S comprises the base paper 1 obtained by impregnating the base paper 1A before impregnating with a resin having a universal hardness of 200 to 500, and at least the surface protective layer 3 made of a curable material of a crosslinking curable resin and laminated on the paper 1. The paper S may comprise a design ink layer 2 further provided. The two papers 1 may be laminated. When such decorative paper is adhered onto the base material, the decorative material such as the decorative plate or the like is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to decorative paper used for interior materials of buildings such as walls, doors and other fittings, and surface materials of furniture and the like.
The present invention relates to a decorative material that is attached to a base material. In particular, it relates to a decorative paper and a decorative material having excellent scratch resistance.

[0002]

2. Description of the Related Art Conventionally, for the above surface decoration applications, surface strength is usually required. So, for example,
(1) JP-A-52-134007, JP-A-53-6
Japanese Patent No. 4289 discloses that a urethane resin layer is formed as a surface protective layer (overcoat layer) on decorative paper on which a pattern ink layer is printed on a paper base material. (2) Also, (2
-1) Japanese Patent Publication No. 49-31033, (2-2) Patent No. 27
As disclosed in Japanese Patent No. 40943 and (2-3) Japanese Patent No. 2856862, an electron beam (or ultraviolet) curable resin is used as a surface protective layer (overcoat layer).
A decorative paper having abrasion resistance using a crosslinked cured resin layer crosslinked and cured by irradiation is also used.

[0003]

However, the surface strength of the decorative paper as described above is not always satisfactory. That is, in the structure of the above (1), scratching was caused by rubbing with steel wool, and scratch resistance was poor, and abrasion resistance (evaluated by a test such as JIS K6902) was extremely low. Further, the decorative paper according to the above (2) has good durability against steel wool friction (abrasion resistance to steel wool) and further has a spherical α-
By adding hard particles such as alumina, the wear resistance is greatly improved. However, all of these were poor in scratch resistance, and when scratched with a pencil or the like, dents occurred on the surface, resulting in insufficient scratch resistance. Moreover, the scratch resistance could not be improved only by increasing the hardness of the surface protective layer.

Accordingly, an object of the present invention is to provide a decorative paper and a decorative material having particularly excellent scratch resistance.

[0005]

In order to solve the above problems, the decorative paper of the present invention has a universal hardness of 200-5.
At least a surface protective layer made of a cured product of a cross-linked cured resin was laminated on a base paper impregnated with the resin No. 00. In this way, by impregnating the base paper with a resin having specific mechanical properties to harden the base paper, the scratch resistance can be improved, and the steel wool scratch resistance and abrasion resistance can be improved. .

Further, the decorative paper of the present invention has a configuration in which two layers of base paper impregnated with the above resin are further laminated on the above configuration. By making the base paper into a two-layer structure in this way,
A thick layer of hard resin-impregnated paper can be easily obtained. As a result, a decorative paper having even more excellent scratch resistance can be easily obtained.

Further, the decorative paper of the present invention has a constitution in which a picture ink layer is further provided between the outermost surface of the base paper and the surface protective layer in addition to any of the above constitutions. By providing the design ink layer in this way, it is possible to make a decorative paper of high design, and the design ink layer has good abrasion resistance.

Further, the decorative material of the present invention has a configuration in which any of the decorative papers described above is bonded to a base material. By doing so, the decorative material, such as a decorative board, has the above-mentioned effects of the decorative paper, such as good scratch resistance.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The decorative paper of the present invention is described below.
An embodiment will be described.

First, FIG. 1 is a cross-sectional view illustrating an embodiment of the decorative paper of the present invention through its manufacturing process. That is, the decorative paper S of the present invention impregnates the base paper 1A before resin impregnation as shown in FIG. 1A with a resin having a universal hardness of 200 to 500 as shown in FIG. After making the base paper 1 solidified, as shown in FIG.
The surface protection layer 3 made of a cured product of a cross-linked cured resin after printing the pattern ink layer 2 as necessary
Is applied and laminated. In addition, the pattern ink layer 2
Can be omitted as appropriate if there is no problem in the appearance of the design even without it.

[0011] The base paper 1 impregnated with a resin having specific physical properties.
May have a two-layer structure. For example, the base paper 1 having a configuration in which the base paper 1a and the base paper 1b are stacked like the decorative paper S illustrated in FIG. 2D may be used.

FIG. 3 is a sectional view showing one embodiment of the decorative material of the present invention. The decorative material D shown in FIG.
(C) or decorative paper S as illustrated in FIG. 2 (D), with an adhesive layer 5 interposed therebetween such that the base paper 1 side faces the base material 4 side.
This is a configuration in which it is attached to the base material 4 and laminated. The adhesive layer 5 may be omitted when the base material has an adhesive property, but is usually provided.

Hereinafter, each of these layers will be described in more detail.

[Base Paper] Base paper 1 is obtained by impregnating a paper base material (base paper 1A or base paper 1B) with a resin having a universal hardness of 200 to 500. At least in the form of decorative paper, resin-impregnated paper is used. Becomes As the paper base, for example, any paper having an impregnating property such as thin paper, kraft paper, high quality paper, linter paper, baryta paper, and Japanese paper can be used. As the pulp constituting the paper, N-wood (softwood) pulp, L-wood (hardwood) pulp, or pulp obtained by mixing these materials is used. Generally, L-material pulp is mainly used when emphasizing the formation and surface smoothness of paper, and N-material pulp is mainly used when emphasizing paper strength. The basis weight is usually 20 to 15
It is about 0 g / m ² .

In the present invention, a resin having a universal hardness of 200 to 500 is used as the resin to be impregnated in the paper base material. If the universal hardness is less than 200, scratch resistance (evaluated by a pencil hardness test according to JIS K 5400 and a JAS special plywood scratch hardness A test) becomes insufficient. As a result, the decorative paper or the decorative material is likely to be dented or scratched under the actual use test of the decorative paper or the decorative material. On the other hand, when the universal hardness exceeds 500, the decorative paper becomes too hard and becomes brittle, and when the decorative paper is continuously produced as a continuous band, the decorative paper is formed into a paper tube (usually 75 mm).
When wound up (3 inches in diameter), cracks and cracks occur in decorative paper. In addition, during the processing of bonding to a base material to form a decorative material, breakage is likely to occur when tension or the like is applied.

The universal hardness can be measured using a commercially available hardness measuring device such as an ultra-micro hardness tester (H100V manufactured by H Fisher). Further, the universal hardness referred to in the present invention refers to the base paper 1 after resin impregnation.
, Not the hardness of the impregnated resin itself. Therefore, in the present invention, the measurement of the hardness is 10 m in thickness.
The impregnated resin was applied on a glass plate having a thickness of 50 μm, and the resin was solidified to form a film having a thickness of 50 μm.

By the way, the universal hardness is defined as [load] / [surface area where the indenter is in contact with the object under test load] while the indenter is pressed into the object under application of a load. can get. The unit of the universal hardness is [N / mm ² ]. In the present invention, the test load was 20 mN, and the measurement time was measured under the conditions of applying a load of 20 mN continuously for 6 seconds using the ultra-micro hardness tester (H100V).

In order to set the universal hardness in a higher direction, generally, in the case of a non-crosslinked resin (for example, a thermoplastic resin), the average degree of polymerization (molecular weight) is higher, the degree of crystallinity is higher, and the glass transition is higher. Set the temperature higher. In the case of a crosslinkable resin (for example, a curable resin), the average molecular weight between crosslinks is set smaller and the crosslink density is set higher. On the other hand, in order to set the universal hardness in a lower direction, the above may be reversed.

The impregnating resin to be impregnated into the paper base material (base paper 1A or base paper 1B) is not particularly limited as long as it has a universal hardness of 200 to 500 in a solidified state, and may be a curable resin or a thermoplastic resin. A resin or the like depending on the use may be appropriately used. Of course, it is preferable from the viewpoint of scratch resistance that the impregnating resin is impregnated so as to penetrate from the front surface to the back surface of the base paper. As such a resin, for example, the following resin can be used.

For example, thermoplastic resins include polymethyl (meth) acrylate, polybutyl (meth) acrylate, polyethyl (meth) acrylate, and methyl (meth) acrylate.
Acrylate-butyl (meth) acrylate copolymer,
Homo- or copolymers of alkyl (meth) acrylates such as methyl (meth) acrylate-styrene copolymer, methyl (meth) acrylate-butyl (meth) acrylate-2 hydroxyethyl (meth) acrylate copolymer; Acrylic resin [However, (meth) acrylate means acrylate or methacrylate]
And the like, and as the curable resin, a melamine resin, an epoxy resin, a two-part curable urethane resin (select from the same resins as those exemplified as a resin for the surface protective layer described later)
Etc. can be used.

The resin may be impregnated before or after printing and coating the pattern ink layer and the surface protective layer on the base paper 1A, or may be performed after the pattern ink layer and the surface protective layer are formed. . In FIG. 1 described above, before forming the pattern ink layer 2 and the surface protection layer 3, the base paper 1A is impregnated with a resin, and the pattern ink layer 2 and the surface protection layer 3 Was formed to manufacture the decorative paper S.
On the other hand, FIG. 2 shows an example in which a resin is impregnated after the pattern ink layer 2 and the surface protective layer 3 are formed. That is, in the case of FIG. 2, the first base paper 1A before resin impregnation as shown in FIG.
A pattern ink layer 2 is formed as shown in FIG. 2 (B), and a surface protective layer 3 made of a cured product of a crosslinked and cured resin is further formed as shown in FIG. 2 (C). Then, as shown in the lower part of FIG. 2 (C), after impregnating resin R is laminated on the second base paper 1B before resin impregnation to become the backing paper by coating or the like, this is coated with the previous pattern ink layer 2 and the surface. As shown in FIG. 2 (D), both the base paper 1A and the base paper 1B are impregnated with the impregnated resin R so as to be in contact with the base paper 1A on which the protective layer 3 has been formed. And 1b, the base paper 1
The decorative paper S is finally obtained as the base paper 1 composed of a and 1b. When the impregnating resin R is a curable resin, when the impregnating resin is impregnated on both base papers 1A and 1B by superimposing the base paper 1A and the base paper 1B before impregnation, the impregnated resin R before complete impregnation is obtained. State. In addition, in order to apply and impregnate the base paper before impregnation with the impregnation resin, a known coating / impregnation method such as roll coating may be used.

[Pattern Ink Layer] The pattern ink layer 2 is usually provided, but may be omitted when it is not necessary for the design expression (for example, when the surface protection layer or the base paper itself is sufficient for the design expression). The picture ink layer 2 is a layer in which a picture is formed by a conventionally known printing method such as gravure printing, silk screen printing, offset printing, gravure offset printing, and ink jet printing using ink. As the picture, for example, wood pattern, stone pattern, cloth pattern, tile pattern,
Brick tone pattern, leather pattern, letters, geometric pattern, solid color,
Alternatively, a combination of two or more of these is used. The ink used for forming the pattern ink layer is a vehicle made of a binder or the like, a coloring agent such as a pigment or a dye, and various additives such as an extender pigment appropriately added thereto.As the resin of the binder, for example, nitrocellulose, Cellulose acetate, cellulose-based resin such as cellulose acetate propionate, acrylic resin, urethane resin, vinyl chloride
A simple substance such as a vinyl acetate copolymer or a polyester resin or a mixture containing these is used. Examples of the coloring agent include inorganic pigments such as titanium white, carbon black, red iron oxide, graphite, and ultramarine blue, organic pigments such as aniline black, quinacridone red, isoindolinone yellow, and phthalocyanine blue, titanium dioxide-coated mica, and aluminum. Brilliant pigments such as foil powder, or other dyes. When the design of the design ink layer is solid on the entire surface, the design layer may be formed by applying a known coating method such as roll coating using a coating liquid.

[Surface Protective Layer] The surface protective layer 3 is formed as a cured product of a crosslinked cured resin. As a crosslinked cured resin,
A known curable resin such as a thermosetting resin or an ionizing radiation-curable resin that undergoes cross-linking and curing may be used according to required physical properties. For example, as the thermosetting resin, a two-component curable urethane resin, an amino alkyd resin, an epoxy resin, an unsaturated polyester resin, or the like is used. Then, the surface protective layer is formed by coating a coating liquid comprising such a crosslinked cured resin with a gravure coat,
It can be formed by coating with a roll coat or the like and crosslinking and curing the coating film. The thickness of the surface protective layer is usually 1 to
It is about 20 μm.

The above two-component curable urethane resin is
It is a urethane resin containing polyol as a main component and isocyanate as a crosslinking agent (curing agent). As a polyol,
Compounds having two or more hydroxyl groups in the molecule, for example, ethylene glycol, propylene glycol, glycerin, trimethylolpropane, 1,2,6
-Hexanetriol, butenediol, sucrose, glucose, sorbitol, pentaerythritol, mannitol, triethanolamine, n-methyldimethanolamine, polyethylene glycol, polypropylene glycol, acrylic polyol, polyester polyol, polyether polyol, polycarbonate polyol, polyurethane A polyol or the like is used.

On the other hand, as the isocyanate, a polyvalent isocyanate having two or more isocyanate groups in a molecule is used. For example, aromatic isocyanates such as 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, diphenylmethane-4,4'-diisocyanate, crude MDI, polyphenylmethane polyisocyanate, xylene diisocyanate, and triphenylmethane diisocyanate, or An aliphatic isocyanate such as hexamethylene diisocyanate, or hydrogenated diphenylmethane diisocyanate (dicyclohexylmethane-4,4'-diisocyanate);
Various hydrogenated isocyanates such as hydrogenated tolylene diisocyanate and alicyclic isocyanates such as isophorone diisocyanate are used. Alternatively, these polyisocyanates, low molecular weight glycol or triol,
For example, adducts or multimers of various isocyanates such as isocyanate-terminated low molecular weight adducts obtained by reacting with dipropylene glycol, 1,6-hexanediol, 1,2,6-hexanetriol, and trimethylolpropane are used. It can also be used. For example, it is an isocyanate multimer such as tolylene diisocyanate trimer. Among the above isocyanates, aliphatic (or alicyclic) isocyanates are preferable in that they can also improve weather resistance and heat-resistant yellowing, and specific examples thereof include hexamethylene diisocyanate.

As the ionizing radiation-curable resin, specifically, a prepolymer (including a so-called oligomer) and / or a monomer having a radically polymerizable unsaturated bond or a cationically polymerizable functional group in a molecule. Preferably, a composition curable by ionizing radiation, which is appropriately mixed with, is used. Here, the term “ionizing radiation” means an electromagnetic wave or a charged particle having an energy capable of polymerizing or crosslinking a molecule, and is usually an electron beam (EB) or an ultraviolet ray (U).
V) is used.

The above-mentioned prepolymer or monomer specifically has a radically polymerizable unsaturated group such as a (meth) acryloyl group or a (meth) acryloyloxy group, a cationically polymerizable functional group such as an epoxy group in the molecule. Consisting of a compound having These prepolymers and monomers may be used alone or as a mixture of two or more. Here, for example, the (meth) acryloyl group means an acryloyl group or a methacryloyl group. As the ionizing radiation-curable resin, a polyene / thiol-based prepolymer obtained by combining a polyene and a polythiol is also preferably used.

Examples of the prepolymer having a radical polymerizable unsaturated group in the molecule include polyester (meth) acrylate, urethane (meth) acrylate, epoxy (meth) acrylate, melamine (meth) acrylate, and triazine (meth) acrylate. Etc. can be used.
A molecular weight of about 250 to 100,000 is usually used. In addition, (meth) acrylate means acrylate or methacrylate.

Examples of the monomer having a radical polymerizable unsaturated group in the molecule include monofunctional monomers such as methyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and phenoxyethyl (meth) acrylate. Further, among the polyfunctional monomers, diethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, trimethylpropane tri (meth) acrylate, trimethylolpropane ethylene oxide tri (meth) acrylate, dipentaerythritol tetra (meth) acrylate And dipentaerythritol penta (meth) acrylate and dipentaerythritol hexa (meth) acrylate.

Examples of the prepolymer having a cationically polymerizable functional group in the molecule include epoxy resins such as bisphenol epoxy resins and novolak epoxy compounds.
There are prepolymers of vinyl ether resins such as fatty acid vinyl ethers and aromatic vinyl ethers. Examples of the thiol include polythiols such as trimethylolpropane trithioglycolate and pentaerythritol tetrathioglycolate. Examples of the polyene include those obtained by adding allyl alcohol to both ends of a polyurethane made of a diol and a diisocyanate.

In the case of curing with ultraviolet rays, a photopolymerization initiator is added to the ionizing radiation curable resin. In the case of a resin system having a radical polymerizable unsaturated group, acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ethers can be used alone or in combination as a photopolymerization initiator. In the case of a resin system having a cationically polymerizable functional group, an aromatic diazonium salt, an aromatic sulfonium salt, an aromatic iodonium salt, a metallocene compound, a benzoinsulfonic acid ester, or the like is used alone or as a mixture as a photopolymerization initiator. be able to. In addition, the addition amount of these photopolymerization initiators is about 0.1 to 10 parts by mass with respect to 100 parts by mass of the ionizing radiation-curable resin.

As a source of ionizing radiation, a light source such as an ultrahigh-pressure mercury lamp, a high-pressure mercury lamp, a low-pressure mercury lamp, a carbon arc lamp, a black light, and a metal halide lamp is used as an ultraviolet light source. The wavelength of the ultraviolet light is usually 190
The wavelength range of ３380 nm is mainly used. Also, as the electron beam source, Cockcroft-Walton type, Van degraft type, Resonant transformer type, Insulated core transformer type, or
Using various types of electron beam accelerators such as a linear type, a dynamitron type and a high frequency type, 100 to 1000 keV, preferably 1 to 1000 keV.
A device that emits electrons having an energy of 00 to 300 keV is used. The irradiation amount (absorbed dose) of the electron beam is usually about 20 to 150 kGy (2 to 15 Mrad).

Incidentally, various additives may be further added to the crosslinked resin such as the ionizing radiation-curable resin as required. These additives include, for example, vinyl chloride-vinyl acetate copolymers, vinyl acetate resins, acrylic resins, thermoplastic resins such as cellulosic resins, calcium carbonate, barium sulfate, and fillers composed of fine powders such as lubricants. Examples include pigments (fillers), lubricants such as silicone resins and waxes, and colorants such as dyes and pigments.

When the wear resistance is required to be improved, hard inorganic particles are used as the lubricant. Examples of the material of the inorganic particles include alumina (such as α-alumina), silica, glass, silicon carbide, and diamond.
The shape of the inorganic particles is a sphere, a polygon, a scale, an irregular shape, or the like. The average particle size of the inorganic particles is preferably about 3 to 30 μm. If the average particle size is too small, the effect of improving the wear resistance is reduced, and if it is too large, the surface smoothness is reduced. The amount of the lubricant added is about 5 to 30% by mass based on the total amount of the resin.

[Cosmetic Material] The decorative paper of the present invention as illustrated in the sectional view of FIG. Is obtained. 1 (C) and FIG. 2 (D)
Is a configuration in which the decorative paper S of the present invention having a configuration as exemplified above is adhered to the base material 4 via the adhesive layer 5.

[Substrate] The substrate 4 is not particularly limited. For example, the material of the base material is an inorganic nonmetal-based, metal-based, wood-based, plastic-based, or the like. Specifically, in the case of inorganic nonmetals, for example, papermaking cement, extruded cement, slag cement, ALC (lightweight cellular concrete), GR
C (glass fiber reinforced concrete), pulp cement, wood chip cement, asbestos cement, calcium silicate, gypsum,
There are non-porcelain ceramic materials such as gypsum slag, and inorganic materials such as ceramics such as earthenware, pottery, porcelain, setware, glass, and enamel. Further, in the metal system, for example, there are metal materials such as iron, aluminum, and copper. In the wood system, for example, there are a veneer, a plywood, a particle board, a fiber board, a laminated wood and the like made of cedar, cypress, oak, lauan, teak and the like. In the case of plastics, for example, polypropylene, A
There are resin materials such as BS resin and phenol resin. The shape of the base material is arbitrary, such as a flat plate, a curved plate, or a polygonal prism.

[Adhesive] The adhesive layer 5 can be omitted when it is bonded by heat-sealing the base material itself (for example, a resin base material) or the like, but is usually provided. There is no particular limitation on the adhesive used for the adhesive layer, and the materials and uses of the base paper and the base material,
An appropriate adhesive may be selected and used from known adhesives according to required physical properties and the like. For example, an adhesive made of a thermoplastic resin such as a polyamide resin, an acrylic resin, or a vinyl acetate resin, or a curable resin such as a thermosetting urethane resin or a urea resin is used. The adhesive may be applied by a known coating method such as roll coating. The adhesive is
After application to the substrate, the decorative paper, or both, the decorative paper is bonded to the substrate.

[Uses] There are no particular restrictions on the use of the decorative paper and decorative material of the present invention, but they include building interior materials such as walls, floors and ceilings, doors, door frames, window frames and other fittings, rims, Used for building members such as skirting boards, furniture such as chests and cabinets.

[0039]

The present invention will be further described below with reference to examples and comparative examples.

Example 1 A decorative paper S as shown in FIG.
And the decorative material D as shown in FIG. 3 was produced as follows. An acrylate resin having a universal hardness of 200 (glass transition temperature: 60 ° C.) as an impregnating resin is impregnated into a paper base material (base paper 1A) and solidified into a base paper 1 having a basis weight of 60 g / m ² , Pattern ink layer 2 expressing wood grain pattern
As a binder resin, a mixed resin of an acrylic resin and nitrocellulose as a binder resin, a solid ink layer of an ink containing titanium white, graphite and benzidine yellow as a main component, and nitrocellulose as a binder resin, carbon black and red iron oxide A wood-patterned pattern ink layer was formed in this order with an ink containing a colorant as a main component.

Next, on the pattern ink layer, 3
An ionizing radiation (electron beam) curable resin paint comprising 60 parts by mass of a functional polyester acrylate prepolymer, 10 parts by mass of trimethylolpropane triacrylate, 29 parts by mass of 1,6-hexanediol diacrylate, and 1 part by mass of silicone acrylate, After application by a roll coating method so as to have an application amount of 10 g / m ² (when cured), electron beam irradiation was applied to crosslink and cure the surface protection layer 3 to obtain a decorative paper S.

Next, the decorative paper S was coated on a substrate 4 made of a particle board having a thickness of 30 mm using a urea-based adhesive.
Was laminated by a hot press method to obtain a decorative material (decorative plate) D of the present invention as shown in FIG. As shown in FIG. 3, the configuration of the decorative material D is such that the base paper 1, the pattern ink layer 2, and the surface resin layer 3 are arranged on the base material 4 via the adhesive layer 5 from the base material 4 side as decorative paper. The decorative paper S is stuck and laminated.

Example 2 A decorative paper and a decorative material were obtained in the same manner as in Example 1 except that the impregnated resin was changed to a melamine resin having a universal hardness of 400.

Example 3 A decorative paper and a decorative material were obtained in the same manner as in Example 1 except that the impregnated resin was changed to a melamine resin having a universal hardness of 500.

Embodiment 4 A decorative paper S as shown in FIG.
And the decorative material D as shown in FIG. 3 was produced as follows. resin
30 g / m basis weight as base paper 1A before impregnation^TwoUsing thin paper
The same pattern ink layer 2 as in Example 1 was formed thereon.
Then, a two-part curable urethane resin paint is applied at 10 g / m.^Two(solid
Coating) to form the surface protective layer 3 and apply urethane
Print sheet. Next, the urethane coat printing system
On the back of the sheet, the basis weight of the backing paper is 45 g / m ^TwoIncluding resin
The base paper 1B before immersion is mixed with a polyester polyol and tolylene.
With a universal hardness of 300 consisting of diisocyanate
Laminated using a two-component curable urethane resin adhesive,
After impregnating the adhesive into base paper 1A and base paper 1B, 70
Cured at 72 ° C. for 72 hours to cure the adhesive.
(C) A decorative paper S having a two-layered base paper 1 was obtained. Next
Then, the decorative paper S is coated with a urea-based adhesive to a thickness of 30%.
mm MDF (Medium Density Fiberboard)
Laminated by the lacquer method, as shown in FIG.
(Decorative board) D was obtained. The configuration of the cosmetic material D is as shown in FIG.
The base material 4 is provided as a decorative paper on the base material 4 with the adhesive layer 5 interposed therebetween.
Base paper 1 (consisting of base papers 1A and 1B described above) from the side, picture
Decorative paper S composed of pattern ink layer 2 and surface resin layer 3
Are a configuration in which they are attached and laminated.

Example 5 In Example 4, the adhesive used for bonding the base paper 1B as the backing paper was a universal hardness of 5 consisting of a urethane acrylate prepolymer.
Instead of using the ionizing radiation (electron beam) curable resin of No. 00, the base paper 1A and the base paper 1B were impregnated with an adhesive, and then irradiated with an electron beam at 50 kGy (5 Mrad) to cure the adhesive. A decorative paper and a decorative material were obtained in the same manner as in Example 4.

COMPARATIVE EXAMPLE 1 A cosmetic was prepared in the same manner as in Example 1 except that the impregnated resin was changed to an acrylate resin having a universal hardness of 130 (glass transition temperature: 40 ° C.). Paper and decorative materials were obtained.

Comparative Example 2 A decorative paper and a decorative material were obtained in the same manner as in Example 2 except that the impregnated resin was changed to a melamine resin having a universal hardness of 120.

Comparative Example 3 A decorative paper and a decorative material were obtained in the same manner as in Example 2 except that the impregnated resin was changed to a melamine resin having a universal hardness of 600.

Comparative Example 4 In Example 4, the adhesive used for laminating the base paper 1B as the backing paper was changed to a two-part curable urethane resin having a universal hardness of 120 and consisting of polyester polyol and tolylene diisocyanate. Except having changed, it carried out similarly to Example 4, and obtained the decorative paper and the decorative material.

Comparative Example 5 In Example 5, the adhesive used for bonding the base paper 1B as the backing paper was a universal hardness of 70 made of urethane acrylate prepolymer.
A decorative paper and a decorative material were obtained in the same manner as in Example 5, except that the ionizing radiation (electron beam) curable resin of No. 0 was used.

[Evaluation of Performance] A pencil dent test and a scratch hardness test were performed as scratch resistance, and the presence or absence of cracks in decorative paper when a 75 mm diameter paper tube was wound was evaluated. The results are shown in Table 1.

In the pencil dent test, a pencil 9H and a load 5 were used.
At 00 g, the cosmetic material surface was scratched with a pencil scratch tester according to JIS K 5400, and the dents generated on the surface were measured and evaluated. In addition, the scratch hardness test was performed by JAS
The surface of the decorative material was scratched by a special plywood scratch hardness test, and the dents generated on the surface were measured and evaluated.

[0054]

[Table 1]

[Consideration of Results] Regarding the scratch resistance, the depth of the dent formed on the surface was as good as 10 μm or less in all Examples. However, in Comparative Examples, the dent depth was 1 except for Comparative Examples 3 and 5 where the pit depth was 0 μm (no dents occurred).
It was as poor as 5 μm or more. However, in Comparative Example 3 and Comparative Example 5, in which no dents were generated, the decorative paper was cracked at the time of winding the paper tube, and was generally poor. Therefore, only the respective examples were generally good including the presence or absence of cracks when winding the paper tube.

[0056]

(1) According to the decorative paper of the present invention, scratch resistance can be improved, and steel wool scratch resistance and abrasion resistance can be improved. (2) Further, if the base paper has a two-layer configuration, a thick hard resin-impregnated paper layer can be easily obtained, and a decorative paper having even better scratch resistance can be easily obtained. (3) If a pattern ink layer is provided between the base paper and the surface protective layer, the design can be made high, and the abrasion resistance of the pattern ink layer can be improved.

(4) According to the decorative material of the present invention, each effect of the decorative paper such as good scratch resistance can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating one embodiment of the decorative paper of the present invention in a manufacturing process.

FIG. 2 is a cross-sectional view illustrating another embodiment of the decorative paper of the present invention in a manufacturing process.

FIG. 3 is a cross-sectional view illustrating one embodiment of the cosmetic material of the present invention.

[Explanation of symbols]

 Reference Signs List 1 base paper impregnated with specific resin 1a first base paper impregnated with specific resin 1b second base paper impregnated with specific resin 1A base paper before resin impregnation 1B second base paper before resin impregnation 2 design ink layer 3 Surface protective layer 4 Base material 5 Adhesive layer D Cosmetic material R Impregnated resin S Cosmetic paper

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 4F100 AA23H AA37H AJ06 AK01A AK01B AK01C AK25 AP03 AT00E BA02 BA03 BA04 BA05 BA07 BA10B BA10E CA23 DG10A DG10C GB08 GB81 HB00 HB31D JB12B JK12A JK12C

Claims (4)

[Claims] 1. A decorative paper comprising a base paper impregnated with a resin having a universal hardness of 200 to 500, and at least a surface protective layer made of a cured product of a crosslinked cured resin laminated on the base paper. 2. The decorative paper according to claim 1, wherein two layers of the base paper impregnated with the resin are laminated. 3. The decorative paper according to claim 1, further comprising a picture ink layer between the outermost surface of the base paper and the surface protective layer. 4. A decorative material comprising the decorative paper according to claim 1 and a substrate.