JPH06262133A - Delustered decorative material - Google Patents

Abstract

PURPOSE:To provide a delustered decorative material excellent in transparency and glare proof property. CONSTITUTION:This decorative material is composed of a patterned layer 2 and a delustered layer 3 having a fine rugged pattern on the surface film- formed by applying a coating material made of composition containing a transparent synthetic resin beads having (n1) refractive index and a transparent ionizing radiation curable resin composition having (n2) refractive index, where n1 n2, and hardening.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative sheet for building materials, and more particularly to a matte decorative sheet which has excellent transparency and antiglare property on its decorative surface.

[0002]

2. Description of the Related Art Conventionally, a coating film made of an ionizing radiation-curable resin composition having hardness and excellent abrasion resistance has been used for surface protection of a decorative material. Further, in order to deluster the coating film, an extender pigment, amorphous silica and the like have been blended.

[0003]

In the conventional matte decorative material, since the demand for scratch resistance is extremely high, it is used as a matting agent for an ionizing radiation curable resin having a high gloss but hardness. A coating film made of a resin composition containing an extender pigment and amorphous silica was provided on a decorative sheet to form a structure. In order to impart sufficient antiglare property to the surface of the decorative material, this amorphous silica needs to be blended in a proportion of 2 parts by weight or more based on 100 parts by weight of the resin. A coating film containing a large amount of inorganic material has excellent anti-glare property, but has a problem that the pattern of the cosmetic material becomes unclear due to lack of transparency.

It is an object of the present invention to provide a matte decorative sheet which is excellent in antiglare property and at the same time has no deterioration in transparency and in which a pattern of a decorative material can be clearly seen.

[0005]

In order to achieve the above object, beads of transparent synthetic resin having a refractive index of n ₁ on one surface of a decorative material and transparent ionizing radiation curable resin having a refractive index of n ₂ Is a matte layer having a fine uneven pattern on its surface, which is cured by a coating liquid containing the composition of ₁₎ , and has a refractive index of n ₁ ≈n ₂ and an ionizing radiation curable resin resin composition Contains 0.01 to 0.1% of silica beads having a particle diameter of 0.5 μm or less to prevent the separation of the coating liquid.

The decorative material is a known base material such as a sheet, a film, a plate, or a molded product which is provided with a decorative property, and the material thereof includes the following. Paper processing sheets such as thin paper, kraft paper, sol coated paper such as vinyl chloride, polyethylene terephthalate, polybutylene terephthalate,
Polycarbonate, polyamide, polyimide, hard vinyl chloride, soft vinyl chloride, polyethylene, polypropylene, ethylene / acrylic acid copolymer, ethylene / vinyl acetate copolymer, ethylene / ethyl acrylate copolymer, polymethylpentene, polymethylmethacrylate,
There are transparent or colored plastic sheets formed from polybutyral, triacetyl cellulose, diacetyl cellulose, polyurethane and the like, and boards such as wood veneer, plywood and gypsum board. Preferably, the plasticizer having a laminating suitability is a vinyl chloride sheet containing 25 to 40 parts with respect to 100 parts of the resin.

For the makeup applied to the substrate, a conventionally used method is adopted, for example, rotary printing by gravure printing, gravure offset printing, flexographic printing, lithographic printing, etc., a pattern by sheet printing, or a roll. Monochromatic formation by coating, gravure coating, flow coating. And
The patterns include wood patterns, grain patterns, grain patterns, stone patterns, cloth patterns, sand patterns, natural patterns, letter symbols, and abstract patterns. A parallel line pattern formed by parallel straight lines or curved lines, a wood pattern, a stone pattern, a cloth pattern, a copy of a natural product such as a grain pattern, a letter symbol, an uneven pattern provided on a base material such as an abstract pattern. Formation of a layer (see Japanese Patent Publication No. 63900/1990). A monochromatic base material formed by including a coloring agent. Coloring ink or paint is applied to the entire surface of the decorative base material having an uneven pattern, and the coated base material is wiped off with a doctor blade, an air knife, or a roller having a sponge, cloth or the like as a surface material, and the convex portion is applied. By removing the ink or paint, the recess is filled with colored ink,
A method for forming a conduit portion of wood grain (see Japanese Patent Publication No. 58-14312). And other makeup methods.

The coating film forming resin used in the ionizing radiation curable resin composition has a polymerizable unsaturated bond in the molecule, or
It is a composition in which a prepolymer having an epoxy group, an oligomer and / or a monomer are appropriately mixed. Examples of these resin systems include polyfunctional urethane acrylates, polyester acrylates, acrylates such as epoxy acrylates, silicon resins such as siloxanes, polyesters, epoxy resins and the like.

Examples of the above prepolymers and oligomers include unsaturated polyesters such as condensation products of unsaturated dicarboxylic acids and polyhydric alcohols, and / or polyol compounds having two or more thiol groups in the molecule. For example, there are trimethylolpropane trithioglycolate, trimethylolpropane trithiopropiopyrate, pentaerythritol tetrathioglycol and the like. Further, the above compounds are used as a simple substance or as a mixture of two or more kinds, if necessary, but 5% by weight of the above-mentioned prepolymer or oligomer is added to the resin composition so as to have usual coating suitability.
As described above, it is preferable that the above-mentioned monomer and / or polyol is 95% or less. As the monofunctional acrylate-based simple substance as described above, 2-hydroxyacrylate, 2
-Hexyl acrylate, phenoxyethyl acrylate and the like. Further, as the bifunctional acrylate-based monomer, ethylene glycol diacrylate, 1,6
-Hexanediol acrylate and the like, and further examples of trifunctional or higher functional acrylate-based monomers include trimethylolpropane triacrylate and dipentaerythritol hexaacrylate.

The ionizing radiation described in the present invention means having an energy quantum that polymerizes and crosslinks molecules among electromagnetic waves or charged particle beams, and usually ultraviolet rays and electron beams are used. In particular, in the case of curing with ultraviolet rays, as a photopolymerization initiator in the ionizing radiation curable resin composition, acetophenones, benzophenones, mihirabenzoylbenzoate, α-amyloxime ester, tetramethylmeuram monosulfide, Thioxanthones and / or n-butylamine, triethylamine, tri-n-butylphosphine, and the like are mixed and used as a photosensitizer.

The coating solution for imparting the antiglare property has a refractive index of n ₁
And a composition using a transparent ionizing radiation curable resin having a refractive index of n ₂ as a binder. Then, with n ₁ ≈n ₂ , | n ₁ −n ₂ | ≦
It is preferably 0.2. Needless to say, the synthetic resin beads are spherical, have less irregular reflection, and are transparent. Then, in order to prevent bubbles from remaining with the binder resin, a bead with a small surface irregularity is selected, and in some cases, defoaming work is performed when the coating liquid is formed. Further, in order to prevent the synthetic resin beads contained in the above coating solution from settling, amorphous silica is added in an amount of 0.01 to 0.
Consists of 1 part by weight. When the surface roughness Ra of the coating film is 100 μm or more, the particles can be visually identified, and the surface becomes a rough surface rather than a matte surface. Therefore, the particle diameter Ra of the synthetic resin beads and amorphous silica capable of exerting the matte effect on the surface is Ra≈1 to 100 μm. The reason why the refractive index of the ionizing radiation curable resin synthetic resin beads is limited is that the refractive index of the ionizing radiation curable resin is generally 1.40 to 1.60. Therefore, by selecting resin beads having a refractive index close to that, it is possible to impart antiglare properties without impairing the transparency of the coating film. Next, Table 1 shows resin beads having a refractive index close to that of the ionizing radiation curable resin.

[0012]

[Table 1]

The coating liquid of the present invention contains resin beads having a particle diameter of 3 to 8 μm in an amount of 2 to 100 parts by weight of the binder resin.
10 parts by weight, preferably 3 to 6 parts by weight are mixed and dispersed. The resin beads contained in this coating solution tend to separate and settle during storage or coating. In order to prevent this, silica having a particle size of 0.5 μm or less can be added as an anti-settling agent. The addition of silica is effective for preventing the sedimentation of the organic filler, but it impairs the transparency. The amount of silica that has the effect of preventing precipitation without impairing the transparency of the coating film is
It is preferably 0.1 parts by weight or less with respect to 00 parts by weight.

Further, the surface of the coating film of the present invention may contain a surfactant as an antistatic agent for the purpose of preventing contamination due to adhesion of dust due to static electricity. The surfactants used are nonionic surfactants such as glycerin fatty acid esters, sorbitan fatty acid esters, polyoxyethylene alkylphenyl ethers, and ionic surfactants such as alkyl sulfonates, alkylbenzene sulfonates, and alkyl sulfonates. There are naphthalene sulfonate, alkyl sulphate, polyoxyethylene alkyl phosphate. Further, in order to improve the scratch resistance of the coating film surface, a lubricant such as a fluororesin, a wax or a silicone resin may be added.

The coating solution of the present invention can be applied by various known methods such as roll coating, gravure coating, gravure reverse coating, air knife coating and blade coating.

[0016]

【Example】

(Example 1) As a base material 1, a decorative material 10 was prepared by printing a pattern layer 2 of wood grain on a colored vinyl chloride sheet having a thickness of 0.15 mm with a gravure rotary press. Using a roll coater, an ultraviolet-curable [blending 1] coating liquid was applied to this decorative material.
A coating having a thickness of 10 μm was applied, and an ultraviolet ray of 80 W was irradiated for 5 seconds to cure the coating liquid, thereby forming the matte decorative material of the present invention. [Composition of coating solution 1] Polycarbonate beads 10 μm average particle size 5 parts by weight Urethane acrylate oligomer 35 parts by weight Urethane acrylate monomer 15 parts by weight Amorphous silica 0.1 parts by weight Solvent 45 parts by weight ──── ─────────────────────────────── Total 100 parts by weight

(Example 2) As the base material 1, a thickness of 0.20 mm
Colored vinyl chloride sheet using a gravure rotary press with a wood grain pattern (bright pattern on the surface of the skin excluding the conduit of the wood grain pattern) using a vinyl-based ink as a binder and a darker color than the sheet A decorative material 10 was produced by gravure-printing the pattern layer 21 with a blurred plate. Then temperature 1
Under the conditions of 50 ° C., linear pressure of 1 ton, and 10 m / min., An embossing plate having a pattern of the conduit portion of the wood grain is used to heat press-bond the printed pattern surface and the transparent vinyl chloride sheet 4 of 0.1 mm. Then, they were attached and embossed at the same time. To the recess of the conduit thus formed, apply the surface including the recessed portion of the sheet with a dark (black) coating solution of the same type, and remove the coating solution on the projection with a doctor blade, leaving only the recess. Then, the coating liquid on the convex portion was wiped off with a wiping paper to form a colored portion 5 on the conduit portion. The thus obtained cosmetic material was coated with the same UV-curable coating composition [Formulation 1] as in Example 1 using a roll coater to give a thickness of 10 μm.
And then the coating liquid was cured by irradiating 80 W of ultraviolet rays for 5 seconds to form the matte decorative material of the present invention.

[Comparative Example] A substrate sheet having a thickness of 0.15 mm
A decorative sheet was made by printing a wood grain pattern on the vinyl chloride sheet of No. 3 using a gravure rotary press. To this decorative sheet, a coating liquid of [Formulation 2] which is a UV curing type of Formulation 2 is applied with a roll coater to a thickness of 10 μm and irradiated with 80 W of ultraviolet light for 5 seconds to cure the application liquid. A conventional matte decorative sheet, which is a comparative example, was constructed. [Composition 2 of coating liquid] Amorphous silica 10 parts by weight Urethane acrylate oligomer 35 parts by weight Urethane acrylate monomer 15 parts by weight Solvent 40 parts by weight ──────────────── ───────────────── Total 100 parts by weight

Table 2 shows the surface characteristics and optical characteristics of the matte decorative sheet thus constructed.

[Table 2] As seen in diffuse transmittance, haze and gloss values,
A matte decorative sheet excellent in transparency and antiglare property was obtained.

[0020]

As described above, according to the present invention, a transparent synthetic resin bead having a refractive index of n ₁ on one surface of a decorative material,
It is hardened from a coating liquid consisting of a composition with a transparent ionizing radiation-curable resin having a refractive index of n ₂ , and the film-formed surface is composed of a matte layer with minute unevenness patterns. It is possible to provide a matte decorative sheet having excellent properties and antiglare properties.

[Brief description of drawings]

FIG. 1 is a basic cross-sectional view of a matte decorative material.

FIG. 2 is a cross-sectional view of a matte decorative material of Example 2 in which a colored layer is provided on the conduit portion.

[Explanation of symbols]

 10 Decorative Material 1 Base Material 11 Colored Vinyl Chloride Sheet 2 Picture Layer 21 Picture Layer with Blurred Plate 3 Matte Resin Layer with Ionizing Radiation Curing Resin 4 Transparent Vinyl Chloride Sheet 5 Colored Layer on Embossed Pipe

Claims (2)

[Claims] On one side of the 1. A decorative material, and the beads of the transparent synthetic resin having a refractive index of n _1, the refractive index is cured from a coating solution comprising the composition of the transparent ionizing radiation curable resin is n _2,
A matte decorative material, characterized in that the film-formed surface is composed of a matte layer with a fine uneven pattern and n ₁ ≈n ₂ . 2. The ionizing radiation curable resin composition comprises a matte layer formed from a coating liquid containing 0.01 to 0.1% by weight of amorphous silica. Matte cosmetic material