JPH07205388A - Matte decorative material - Google Patents

Abstract

PURPOSE:To provide a matte decorative material suppressed in gloss and excellent in anti-glaring properties, transparency, friction resistance and scratch resistance. CONSTITUTION:The surface matte layer 2 of a matte decorative material 1 is mainly constituted of a matting agent 6 composed of synthetic resin beads having a porous structure and an ionizing radiation curable resin. Since the ionizing radiation curable resin before curing penetrates into the porous structure of the synthetic resin beads and the matte layer is cured and formed by the irradiation with ionizing radiation, strong bond is obtained and, as a result, friction resistance and scratch resistance becomes excellent even when the synthetic resin beads having a particle size larger than the thickness of the matte layer are used. When the refractive index difference between the synthetic resin beads and the ionizing radiation curable resin is made zero or small, excellent transparency is obtained.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a matte decorative material,
The present invention relates to a matte decorative material having suppressed gloss, excellent antiglare properties and transparency, and excellent abrasion resistance and scratch resistance.

[0002]

2. Description of the Related Art Conventionally, as a means for improving the abrasion resistance of the surface of various decorative materials and the feeling of coating, a decorative material having a layer made of an ionizing radiation curable resin which is cured by ultraviolet rays or electron beams is used on the surface of the decorative material. It is being appreciated. Decorative materials using these ionizing radiation curable resins on the surface are not only environmentally friendly and can be processed without solvent compared to those with a solvent-drying resin layer, but they also have a glossy appearance. In addition, there is an advantage that a decorative material having excellent painting resistance can be obtained and a resin material surface can be made extremely hard, so that a decorative material having excellent abrasion resistance can be obtained.
However, although the glossy feeling is preferred depending on the application, if the surface of the decorative material is too flat, the pattern of the base may not be seen depending on the viewing angle, which may be an obstacle. Therefore, a matte decorative board with a suppressed gloss is desired, and a decorative board in which a matting agent is mixed in a resin layer on the surface has been produced.
The matting agent conventionally used for such a purpose has been a fine powder such as calcium carbonate, barium sulfate, silica, alumina, glass balloons and polyethylene beads having a particle size of about 0.1 to 10 μm.

However, when a matting agent is used, the transparency of the resin layer on the surface is likely to be lowered and the surface tends to be slightly whitened, resulting in a blurred impression of the base makeup pattern and uneven thickness of the resin layer. There were drawbacks such as the appearance of uneven whiteness. Also, when ionizing radiation-curable resin is used as the resin on the surface to which a matting agent is added, physical properties with high surface hardness and excellent abrasion resistance can be obtained. Then, it was easily scratched and scratch resistance was not sufficiently obtained. This is because the matting agent embedded in the resin layer on the surface and the resin layer are not firmly bonded to each other, so that the matting agent falls off from the resin layer due to scratches.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention While eliminating the above-mentioned drawbacks and making full use of the excellent performance of ionizing radiation-curable resin such as abrasion resistance, it has a matting effect, scratch resistance and transparency. There is a demand for a cosmetic material that can express an extremely excellent surface physical property and a design feeling that have never been obtained by providing an excellent surface layer, and it is an object of the present invention to realize these.

[0005]

Therefore, in order to solve the above problems and achieve the object, the decorative board of the present invention has a matte decorative material in which a matte layer is laminated on at least one surface of a decorative base material. The erase layer is formed by a curing reaction of a matting agent of synthetic resin beads having a porous structure and an ionizing radiation curable resin by ionizing radiation, and the ionizing radiation curable resin is a synthetic resin bead It is a matte decorative material characterized by entering into a porous structure. Further, it is also a matte decorative material characterized in that it is a matte agent containing fine particles having a particle diameter larger than the layer thickness of the matte layer.

The present invention will be described in detail below with reference to the drawings. FIG. 2 is a vertical sectional view showing an embodiment of the matte decorative material according to the present invention. The matte decorative material 1 according to the present invention has a structure in which a matte layer 2 is laminated on at least one surface of a decorative base material 3. In FIG. 2, the decorative base material 3 is provided with the matte layer 2 on the upper surface thereof. The decorative base material 3 is usually plastic, as shown in FIG.
A decorative layer 4 having a pattern by printing or the like is provided on a base material 5 such as a film, paper, metal foil or wood. The decorative base material 3 may be natural wood itself such as a veneer utilizing the pattern of the base material itself, and in this case, the decorative layer 4 may be omitted. The decorative base material may be opaque, semitransparent, or transparent, and is not particularly limited. Hereinafter, each layer will be described in detail.

The matte layer 2 is composed of an ionizing radiation curable resin containing, as a matting agent, synthetic resin beads having a porous structure, and the composition mainly comprises the matte agent and the ionizing radiation curable resin. It is formed by a curing reaction of an object with ionizing radiation. The present invention is characterized by the matting agent used, and at least the surface of the synthetic resin beads as the matting agent has a porous structure. As a result, after the liquid ionizing radiation-curable resin before curing enters the porous structure of the synthetic resin beads, the ionizing radiation-curable resin is cured and a strong bond is obtained. Synthetic resin beads having such a porous structure, for example, by suspension polymerization of a radically polymerizable monomer together with an initiator, a cross-linking agent, and a diluent, the diluent portion in which the polymer is insoluble becomes voids to form a sponge. It is possible to obtain synthetic resin beads having a porous structure with holes. In this way, a porous structure extending over the entire interior of the synthetic resin beads is obtained. Further, the synthetic resin beads having a porous structure only on the surface, for example, dry-blend two kinds of fine particles of positive charging property and negative charging property, and become small as a wall material on the surface of a large particle as a core material. By electrostatically adhering the fine particles and maintaining the shape of the small fine particles appropriately, synthetic resin beads having pores between the small fine particles can be obtained on the surface of the core material. The size of the surface pores forming the porous structure is 0.02 to 7 depending on the particle size of the synthetic resin beads.
It is preferable that the inner diameter of the pore is larger than that of the surface, and the wedge effect of adhesion is larger, but even if the inside is small, the adhesive effect against the shear force in the lateral direction of the hole opening surface is exhibited.

As the resin for forming the synthetic resin beads having such a porous structure, a resin having a good affinity for the ionizing radiation curable resin is preferable because a strong adhesive force is easily obtained, but the resin having a porous structure is preferable. Since a strong bond can be obtained by adhesion due to the wedge effect caused by, there is no particular limitation. For example, acrylic resin, styrene resin, polycarbonate resin, polyamide resin, epoxy resin, phenol resin, melamine resin and the like can be mentioned. In the case of dry blending, synthetic resin beads may be composed of a plurality of resins. The particle size of the synthetic resin beads is about 0.5 to 100 μm, preferably 3 to
The range of 50 μm is good, and if it is less than 3 μm, the scratch resistance deteriorates, and if it exceeds 50 μm, a sufficient matting effect cannot be obtained. Alternatively, when the particle size of the synthetic resin beads is finer than the layer thickness of the matte layer, the particle size is selected in relation to the layer thickness of the matte layer described later. In this case, it is not necessary that all the fine particles of the synthetic resin beads used have a particle size larger than the layer thickness. It suffices to include fine particles having a particle diameter larger than the layer thickness. The compounding amount of the synthetic resin beads is 5 to 30 wt% with respect to the ionizing radiation curable resin.
A degree is preferable. If it is less than 5 wt%, a sufficient matting effect cannot be obtained, and if it exceeds 30 wt%, scratch resistance is deteriorated, which is not preferable.

Further, in the present invention, since the matting agent made of the same resin as the resin constituting the main body of the matting layer 2 is used as the matting agent instead of the inorganic fine powder, the refractive index of such synthetic resin beads is It becomes close to the refractive index of the ionizing radiation curable resin, and by appropriately selecting both resins, it becomes possible to make the refractive index the same or very close. As a result, the transparency of the matte layer 2 can be obtained. When the difference in refractive index between the synthetic resin beads and the ionizing radiation curable resin is usually 0.05 or less, preferable transparency can be obtained.

The ionizing radiation curable resin used in the matting layer 2 is, for example, a prepolymer, oligomer and / or monomer having a polymerizable unsaturated bond such as acryloyl group or methacryloyl group or an epoxy group in the molecule. A composition in which the body is appropriately mixed can be used.

The above-mentioned prepolymers and oligomers include
For example, unsaturated polyesters such as condensation products of unsaturated dicarboxylic acids and polyhydric alcohols, epoxy resins, polyester methacrylates, polyether methacrylates, polyol methacrylates, melamine methacrylates, methacrylates such as silicon methacrylates, polyester acrylates, epoxy acrylates, urethanes. Examples thereof include acrylates such as acrylates, polyether acrylates, polyol acrylates, melamine acrylates and silicon acrylates.

Examples of the above-mentioned monomer include styrene-based monomers such as styrene and α-methylstyrene, methyl acrylate, 2-ethylhexyl acrylate, methoxyethyl acrylate, butoxyethyl acrylate and acryl. Acrylic esters such as butyl acrylate, methoxybutyl acrylate, phenyl acrylate, methacrylic acid such as methyl methacrylate, ethyl methacrylate, propyl methacrylate, methoxyethyl methacrylate, ethoxymethyl methacrylate, phenyl methacrylate, lauryl methacrylate, etc. Acid esters, acrylic acid-2- (N, N-
Diethylamino) ethyl, methacrylic acid-2- (N, N
-Dimethylamino) ethyl, acrylic acid-2- (N, N
-Dibenzylamino) ethyl, methacrylic acid-2-
(N, N-dimethylamino) methyl, acrylic acid-2-
Substituted amino alcohol esters of unsaturated acids such as (N, N-diethylamino) propyl, monofunctional monomers such as unsaturated carboxylic acid amides such as acrylamide and methacrylamide, ethylene glycol diacrylate, propylene glycol dimethacrylate, Bifunctional monofunctional compounds such as neopentyl glycol diacrylate, 1,6-hexanediol diacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, dipropylene glycol diacrylate, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, and propylene glycol dimethacrylate. A quantity,
Polyfunctional compounds such as trifunctional or higher monomers such as trimethylolpropane triacrylate, pentaerythritol tetraacrylate, dipentaerythritol hexaacrylate, trimethylolpropane trimethacrylate, pentaerythritol tetramethacrylate, and dipentaerythritol hexamethacrylate, or Polythiol compounds having two or more thiol groups in the molecule, such as trimethylolpropane trithioglycolate, trimethylolpropane trithiopropylate,
Examples thereof include pentaerythritol tetrathioglycol.

The ionizing radiation as used herein means an electromagnetic wave or a charged particle beam having an energy quantum capable of polymerizing and cross-linking molecules, and usually ultraviolet rays or electron beams are used. In particular, in the case of curing with ultraviolet rays, as a photopolymerization initiator in the composition of the ionizing radiation curable resin, acetophenones, benzophenones, Michler benzoyl benzoate, α-amyloxime ester, tetramethylmeuram monosulfide, It is also possible to mix and use thioxanthones and / or n-butylamine, triethylamine, tri-n-butylphosphine or the like as a photosensitizer. In order to sufficiently inject the liquid ionizing radiation curable resin into the fine porous structure, the amount of the solvent such as the monomer or the diluent is adjusted so that the viscosity is 5000 cps or less, particularly It is preferably 1000 cps or less.

If necessary, one or more of the above prepolymers, oligomers and monomers are mixed with a matting agent, and if necessary, a photopolymerization initiator, a photosensitizer and a solvent. The composition is prepared and used as a matte layer coating liquid, but in order to impart ordinary coating suitability to the coating liquid, 5% by weight or more of the prepolymer or oligomer, and the monomer and / or polythiol are added. It is preferably 95% by weight or less.

When selecting the monomer, epoxy acrylate, urethane acrylate, silicon acrylate, etc. are used in view of abrasion resistance, scratch resistance, and ease of entry of the synthetic resin beads into the porous structure. It is preferable to increase the amount of the monomer within a range that does not hinder the coating suitability, and to use a trifunctional or higher functional acrylate-based monomer to achieve a high crosslinking density. The mixing ratio of the monofunctional monomer and the polyfunctional monomer having a functionality of 2, 3 or more is appropriately selected to adjust the viscosity, the coating suitability, and the physical properties of the cured product. Further, other additives, for example, a polymerization inhibitor such as hydroquinone monomethyl ether for preventing curing before irradiation with ionizing radiation, or a urethane resin, a cellulosic resin, within a range that does not hinder curing by ionizing radiation. A non-ionizing radiation non-curable thermoplastic resin such as polyester resin, acrylic resin, vinyl chloride resin, vinyl acetate resin, butyral resin, or a lubricant such as silicone or polyethylene wax may be blended.

The matte layer 2 may be formed by coating the matte layer coating liquid containing the above composition by a known coating method. For example, roll coat, curtain flow coat,
Wire bar coating, reverse coating, gravure coating, gravure reverse coating, air knife coating, kiss coating, blade coating, smooth coating, comma coating, brush coating, spray coating and the like are used. The matte layer 2 can be partially formed into a pattern by a known printing method such as gravure printing, silk screen printing, offset printing, or the like.

The thickness of the matte layer 2 may be appropriately selected depending on the purpose of use, the design feeling such as depth, physical properties, etc.
˜50 μm, preferably 3 to 30 μm. If it is thinner than 3 μm, surface properties such as scratch resistance and scratch resistance will be insufficient, and if it is thicker than 30 μm,
The matte effect decreases, and it takes time to cure, and the amount of resin increases, which is uneconomical. Here, the meaning when the particle size of the matting agent is larger than the thickness of the matting layer (hereinafter referred to as “layer thickness”) and the meaning of the layer thickness are clarified. Originally, the matting agent is a substance contained in the matting layer, so the concept of the layer thickness should naturally include the matting agent, and the thickness should be understood. impossible. However, the layer thickness here means that the fine particles 6 of the matting agent are present at least in the vicinity of the surface when the matting layer 2 is observed two-dimensionally and microscopically in the particle size order as illustrated in FIG. If the layer thickness of the microscopic portion is more concave than the microscopic portion where the matting agent particles are present in the vicinity of the surface, the thickness of the portion below the grain size that forms the concave portion is defined as the layer thickness. And Further, in the case where any particle size of the fine particles 6 of the matting agent contained in the matting layer 2 is relatively smaller than the layer thickness, the microscopic thickness is not captured as described above, and the convex portions of those surfaces are not captured. Also, it can be taken as usual as an average of all microscopic thicknesses including the concave portions.

Here, one of the characteristics of the matte decorative material of the present invention is that the particle size of the fine particles of the matting agent is relatively larger than the layer thickness as illustrated in FIG. In this case, the surface fine irregularities of the matte layer considerably reflect the shape of the fine particles of the matting agent, and exceptionally fine fine irregularities can be formed. Conventionally, the specifications for making the particle size of such fine particles larger than the layer thickness have been theoretically possible. However, the fixing force for fixing the fine particles to the matte layer was insufficient, and a matte layer excellent in scratch resistance and scratch resistance could not be obtained. However, in the present invention, by using a resin bead having a specific property as a matting agent, it is possible to obtain a practical matting layer that is excellent in scratch resistance and scratch resistance, assuring the fixing force. Is.

The decorative base material 3 is usually a base material 5 such as plastic, film, paper, metal foil, wood or the like, on which a pattern is printed by a known technique to form the decorative layer 4. The decorative base material 3 may be natural wood itself such as a veneer, and in this case, the decorative layer 4 may be omitted. The decorative base material may be opaque, semi-transparent, or transparent, and is appropriately selected depending on the application and is not particularly limited. As the base material 5, a polyolefin resin such as polyethylene or polypropylene, a vinyl resin such as polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, an ethylene-vinyl acetate copolymer or an ethylene-vinyl alcohol copolymer, polyethylene terephthalate, Polyester resin such as polybutylene terephthalate, acrylic resin such as polymethylmethacrylate, polymethylacrylate, polyethylmethacrylate, polystyrene, acrylonitrile-butadiene-styrene copolymer (ABS), triacetylcellulose, cellophane, polycarbonate, etc. Resin film or sheet, or thin paper, kraft paper,
Titanium paper, linter paper, paperboard, gypsum board paper, fine paper,
Paper such as coated paper, art paper, sulfuric acid paper, glassine paper, parchment paper, paraffin paper, or aluminum,
Metal foil such as iron, stainless steel, copper, wood veneer, wood plywood,
Of wood such as particle board, MDF (medium density fiberboard), veneer, or cloth or non-woven fabric made of glass fiber, synthetic fiber, etc., or gypsum slate board, concrete board, ceramic board such as pottery, thermoplastic resin, thermosetting resin The resin plate, the FRP plate, a composite material thereof, a resin molded product, or the like is not particularly limited.

The decorative layer 4 is formed by printing a pattern or the like on the base material 5 by a known method, and is appropriately selected in relation to the material of the base material 5 and the matte layer as the upper layer. It may be formed by the known printing ink described above. As such an ink, for example, a vehicle is appropriately mixed with a coloring agent such as a pigment or a dye, an extender pigment, a solvent, a stabilizer, a plasticizer, a catalyst, a curing agent, etc., if necessary. As the vehicle, a vehicle appropriately selected from thermoplastic resins, thermosetting resins, ionizing radiation curable resins, etc. depending on the application, required physical properties, printability, etc. is used. For printing, known printing means such as gravure printing, offset printing, silk screen printing and the like are used. There may be an intervening layer such as a resin layer or a film layer between the decorative layer 3 and the base material 5, and between the decorative layer 3 and the matte layer 2.

The matte decorative material 1 according to the present invention is obtained as described above. The matte decorative material according to the present invention is a film, a sheet or a paper, or a plate, a block, etc.
The shape is not particularly limited and may be any shape. Also,
The matte layer 2 may be on both sides of the decorative base material 3, and by using transparent ones for the decorative base material 3 and the decorative layer 4, the transparency of the matte layer 2 is utilized to partially or entirely. A transparent or colored transparent transparent decorative material can also be used.

[0022]

The matting decorative material according to the present invention comprises a matting layer composed of synthetic resin beads having a porous structure and ionizing radiation curable resin, and the ionizing radiation curable resin is contained in the porous structure of the matting agent. Can be introduced and cured to form a matting layer, so that the matting agent is firmly bonded to the ionizing radiation curable resin. As a result, the matting agent does not fall off from the matting layer even with scratches on the surface, and a matting decorative material having excellent scratch resistance can be obtained. Moreover, since the matting agent is made of synthetic resin, it can be well adhered to the ionizing radiation curable resin. Further, when using resin beads having a particle diameter relatively large with respect to the thickness of the matting layer, the resin beads are exposed to the surface, and remarkable fine irregularities on the surface are obtained.
Further, by making the difference in refractive index between the two zero or small, the opacity due to the conventional matting agent is eliminated, a transparent matting layer is obtained, and the pattern of the decorative base material is enhanced.

[0023]

EXAMPLES Examples and comparative examples of the present invention will be shown below. In the formulation, "parts" means "parts by weight".

Example 1 A colored polyvinyl chloride film having a thickness of 0.15 mm was used as a substrate, and a vinyl chloride-vinyl acetate copolymer / acrylic resin type ink was used to gravure a wood grain pattern. Multi-color printing was performed to form a decorative layer, which was used as a decorative base material. The following matte coating liquid consisting of electron beam curable resin and synthetic resin beads was applied to this decorative base material using a roll coater, and 175 kV, 3 Mrad was applied.
The ionizing radiation curable resin was cured by irradiating with an electron beam under the conditions described above to form a matte layer having a thickness of 25 μm to obtain a matte decorative material according to the present invention. Matte coating liquid Porous acrylic resin beads 5 parts (Sekisui Plastics Co., Ltd. average particle size 8 μm, maximum particle size 20 μm) Urethane acrylate oligomer 35 parts Acrylate monomer 15 parts Solvent (isopropyl alcohol / ethyl acetate = 1/1 ) 45 copies

Example 2 A colored polyvinyl chloride film having a thickness of 0.1 mm and a plasticizer content of 23 phr was used as a substrate, and a vinyl chloride-vinyl acetate copolymer / acrylic resin type ink was used to obtain a wood grain. The pattern is multi-color printed by gravure printing, and a transparent polyvinyl chloride film with a thickness of 0.1 mm and a plasticizer content of 23 phr is laminated on this by doubling embossing, and the recesses on the surface are wiped to form conduits. A handle was formed to obtain a decorative base material in which a multilayer decorative layer was formed on the base material of the colored polyvinyl chloride film. The following matte coating liquid consisting of ionizing radiation curable resin and synthetic resin beads was applied to this decorative base material using a roll coater, and a high pressure mercury lamp (160 W / cm, 2 W at a feed rate of 20 m / min was applied. (A lamp) to irradiate ultraviolet rays to cure the ionizing radiation curable resin to form a matte layer having a thickness of 15 μm to obtain a matte decorative material according to the present invention. Matte coating liquid Porous acrylic resin beads 4 parts (Sekisui Plastics Co., Ltd. average particle size 20 μm) Urethane acrylate oligomer 29 parts 2-Ethylhexyl acrylate 7 parts Ethylcarbitol acrylate 8 parts Polyethylene glycol 200 diacrylate 6 parts Light Initiator 2 parts (Ciba Geigy Irgacure 184) Lubricant (methacryl-modified silicone) 0.5 part Solvent (isopropyl alcohol / butyl acetate = 1/1) 46 parts

Comparative Example 1 In Example 1, ordinary synthetic resin beads (average particle size 8
A matte decorative material was obtained in the same manner as in Example 1 except that the particle size was 20 μm and the maximum particle size was 20 μm.

Comparative Example 2 In the same manner as in Example 1, except that silica fine powder (average particle size 8 μm) was used as the matting agent,
A matte decorative material was obtained in the same manner as in Example 1.

Comparative Example 3 In Example 2, ordinary synthetic resin beads (average particle size 2
A matte decorative material was obtained in the same manner as in Example 2 except that 0 μm) was used.

The surface properties of the obtained matte decorative material were evaluated. As shown in Table 1, the matte decorative material according to the present invention showed excellent performance.

[0030]

[Table 1]

[0031]

Since the present invention is constructed as described above, it has the following effects. Since the matting agent of synthetic resin beads having a porous structure and the ionizing radiation curable resin are used in the matting layer, the matting agent is firmly fixed to the matting layer, and both abrasion resistance and scratch resistance are achieved. While letting
Suppresses the gloss of the surface and provides excellent antiglare properties. Further, since it is also excellent in transparency, the pattern of the lower layer can be clearly seen, and a decorative material having a novel design feeling can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of a matte decorative material of the present invention.

FIG. 2 is a longitudinal sectional view of another embodiment of the matte decorative material of the present invention.

FIG. 3 is a vertical sectional view of another embodiment of the matte decorative material of the present invention.

[Explanation of symbols]

 1 Matte Decorative Material 2 Matte Layer 3 Decorative Base Material 4 Decorative Layer 5 Base Material 6 Matte Agent

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location B32B 27/16 8413-4F 27/20 Z 8413-4F E04F 13/08 A 9127-2E

Claims (2)

[Claims] 1. A matte decorative material in which a matte layer is laminated on at least one surface of a decorative base material, and the matte layer mainly comprises a matte agent of synthetic resin beads having a porous structure and an ionizing radiation curable resin. A matte decorative material, which is formed by a curing reaction of the composition described above with ionizing radiation, and in which the ionizing radiation curable resin has entered the porous structure of the synthetic resin beads. 2. A matting agent containing fine particles having a particle size larger than the layer thickness of the matting layer.
Matte cosmetic material described.