JP2009241462A - Decorative sheet and floor material using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative sheet excellent in stereoscopic vision and designability. <P>SOLUTION: The decorative sheet 10 has, on one side of a base material layer 1, a first picture layer 2, a second picture layer 3 and a surface protective layer 6 which is formed on the outermost layer in this order. At least a transparent resin layer 4 and a transparent primer layer 5 are formed in this order between the first and second picture layers 2 and 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a decorative sheet and a flooring using the decorative sheet, and particularly to a decorative sheet excellent in high design and a flooring using the decorative sheet.

  Conventionally, a decorative sheet is known which is formed by laminating a pattern layer, a transparent resin layer, and a surface protective layer on which a wood-grain-like print is printed on a base sheet. According to such a decorative sheet, the state of wood grain can be expressed on the surface of the decorative sheet, and it is used in various fields such as indoor floor materials and furniture.

  However, according to such a decorative sheet, although the surface of the wood grain can be expressed on the surface, the pattern layer is formed by printing, so the surface of the pattern layer is smooth, and the texture or three-dimensionality of natural wood. A feeling cannot be expressed on the surface. Since such a decorative sheet is inferior to the texture and three-dimensional feeling expressed on the floor using natural wood, recently, development of a decorative sheet having the same texture and three-dimensional feeling as natural wood is desired. .

Under such circumstances, Patent Document 1 describes a decorative sheet that can impart a three-dimensional effect by filling a colorant into concave portions arranged like printing halftone dots. Describes a decorative sheet capable of giving a three-dimensional effect by providing a concavo-convex pattern on both the inside and the surface. According to the decorative sheet of Patent Document 1, although the three-dimensional effect can be imparted by utilizing the irregularity of the arrangement of halftone dots, the thickness of the pattern layer itself is generally 10 μm or less, and the three-dimensional effect is limited. Is. In addition, according to the decorative sheet described in Patent Document 2, the surface layer provided with the glittering layer and the pattern layer can give a three-dimensional effect to the pattern layer formed thereon, but the unevenness is formed. Since the three-dimensional effect expressed differs depending on the position, the unevenness must be formed in accordance with the position expressing the three-dimensional effect, which is not suitable for a pattern layer or the like on which complicated printing is performed.
JP 2008-055721 A Japanese Patent Laid-Open No. 8-150692

  This invention is made | formed in view of such a condition, and makes it a main subject to provide the decorative sheet which is rich in a three-dimensional effect, and has high design property by providing a transparent resin layer between pattern layers.

  The present invention for solving the above problems is a decorative sheet obtained by laminating a first pattern layer, a second pattern layer, and a surface protective layer formed on the outermost surface in this order on one surface of a base material layer. And at least a transparent resin layer and a transparent primer layer are laminated | stacked in this order between said 1st pattern layer and said 2nd pattern layer.

  The first pattern layer may be a bright colored layer.

  The transparent primer layer may contain an ultraviolet absorber.

  The surface protective layer may be an ionizing radiation curable resin layer.

  A synthetic resin layer may be laminated on the other surface of the base material layer.

  This invention for solving the said subject is a flooring formed by sticking a decorative sheet and a to-be-adhered material, Comprising: The said decorative sheet is a decorative sheet of any one of Claims 1 thru | or 5. It is characterized by being.

  According to the present invention, by providing a transparent resin layer between the pattern layers constituting the decorative sheet, the distance from the decorative sheet surface to the first pattern layer, and the distance from the decorative sheet surface to the second pattern layer, The decorative sheet can be made different, can give a three-dimensional effect to the pattern expressed on the surface of the decorative sheet, and can provide a decorative sheet excellent in high design. Furthermore, according to the present invention in which a transparent primer layer is provided between the transparent resin layer and the second pattern layer, the adhesion between the transparent resin layer and the second pattern layer can be improved, and the weather resistance of the decorative sheet can be improved. Can be improved.

  Hereinafter, the decorative sheet of the present invention will be specifically described with reference to the drawings.

  FIG. 1 is a schematic cross-sectional view showing the layer structure of the decorative sheet of the present invention.

  As shown in the drawing, the decorative sheet of the present invention has a first pattern layer 2, a second pattern layer 3, and a surface on one side of the base layer 1 (in the case shown in FIG. 1, the top side of the base layer 1). It is formed by laminating the protective layer 6.

  Here, the present invention is characterized in that a transparent resin layer 4 and a transparent primer layer 5 are laminated between the first pattern layer 2 and the second pattern layer 3.

  Therefore, according to the decorative sheet 10 of the present invention, by providing the transparent resin layer 4 and the transparent primer layer 5 between the first pattern layer 2 and the second pattern layer 3, the first pattern layer 2 from the decorative sheet surface. The distance between the surface of the decorative sheet and the distance from the surface of the decorative sheet 2 to the second pattern layer 3 can be made different, and a three-dimensional effect can be imparted to the pattern expressed on the surface of the decorative sheet. Can be obtained. Furthermore, according to the present invention in which a transparent primer layer is provided between the transparent resin layer and the second pattern layer, the adhesion between the transparent resin layer and the second pattern layer can be improved, and the weather resistance of the decorative sheet can be improved. Can be improved.

  Hereinafter, each layer which comprises a decorative sheet is demonstrated in detail using FIG.

(Base material layer)
The base material layer 1 is an essential component in the decorative sheet 10 of the present invention, and is a layer that serves as a foundation of the decorative sheet 10.

  The resin of the base material layer 1 used in the present invention is not particularly limited as long as it is usually used as a base material of a decorative sheet, and is not limited to polyethylene resin, polypropylene resin, polymethylpentene resin, polyvinyl chloride resin, polychlorinated resin. Vinylidene chloride resin, polyvinyl alcohol resin, vinyl chloride-vinyl acetate copolymer resin, ethylene-vinyl acetate copolymer resin, ethylene-vinyl alcohol copolymer resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyethylene naphthalate-isophthalate copolymer Resin, polymethyl methacrylate resin, polyethyl methacrylate resin, polybutyl acrylate resin, polyamide resin represented by nylon 6 or nylon 66, cellulose triacetate resin, cellophane, polystyrene resin, polycarbonate Fat, polyarylate resin, or polyimide resin.

  Of these resins, polyolefin resins such as polyethylene resins and polypropylene resins are preferable in consideration of the environment.

  The resin constituting the base material layer 1 may contain a colorant. Colorants include titanium white, zinc white, petal, vermilion, ultramarine, cobalt blue, titanium yellow, yellow lead, carbon black and other inorganic pigments; isoindolinone, Hansa Yellow A, quinacridone, permanent red 4R, phthalocyanine blue Organic pigments such as: Dyes; metal pigments made of foil powder such as aluminum and brass; pearlescent pigments made of foil powder such as titanium dioxide-coated mica and basic zinc carbonate. These colorants are added to give the substrate the necessary color, and may be either transparent coloring or opaque (hiding) coloring, but in general, opaque colors are preferred to hide the adherend. . The addition amount of the colorant is usually in the range of 5 to 60% by mass based on the colored substrate.

  Moreover, you may add an inorganic filler to the base material layer 1 as needed, and powders, such as a calcium carbonate, barium sulfate, clay, talc, silica (silicon dioxide), and alumina (aluminum oxide), etc. are mentioned. The addition amount is usually in the range of 5 to 60% by mass based on the colored substrate.

These base material layers 1 are subjected to easy adhesion treatment such as physical or chemical surface treatment such as an oxidation method or an unevenness method, if desired, in order to improve the adhesion with the layer provided thereon. Can do. 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 depending on the type of substrate, but generally, a corona discharge treatment method is preferably used from the viewpoints of effects and operability.
In order to reinforce the function required as the surface layer of the decorative sheet, the base material layer 1 may have various additives, reinforcing materials, fillers, for example, an ultraviolet absorber, a light stabilizer, a heat stabilizer, Antioxidants, antistatic agents, flame retardants, lubricants and the like are added. The ultraviolet absorber and the light stabilizer are for imparting better weather resistance (light resistance) to the base material layer 1, and the addition amount thereof is usually set to be 0.00 for both the ultraviolet absorber and the light stabilizer. It is about 5-10 mass%. In general, it is preferable to use an ultraviolet absorber and a light stabilizer in combination. Moreover, there is no restriction | limiting in particular about the thickness of the base material layer 1, Usually, it is about 20-150 micrometers, and it is preferable that it is about 30-100 micrometers.

(First pattern layer)
The first pattern layer 2 is an essential component of the decorative sheet 10 of the present invention, and is provided at a position farther from the surface of the decorative sheet 10 than the second pattern layer 3 and is expressed on the surface of the decorative sheet 10. It is a layer provided to give a three-dimensional effect to the pattern expressed on the surface of the decorative sheet by combining with the second pattern layer 3 while functioning as a base pattern of the pattern.

  The pattern of the first pattern layer 2 can be appropriately selected based on the combination with the pattern of the second pattern layer 3 described later, and the pattern is not particularly limited. For example, the base material layer is formed using a coloring ink, a coating agent, or the like obtained by dissolving or dispersing a known glitter colorant (for example, a glitter pigment) in a solvent (for example, a dispersant) together with a binder resin. It may be printed on the entire surface of 1 and a desired pattern (for example, wood grain pattern, stone pattern, tiled pattern, brickwork pattern, geometry, etc.) using a colorant (dye, pigment, etc.) instead of the glitter colorant (Graphics, characters, symbols, abstract patterns, etc.) may be printed on a part or the entire surface of the base material layer 1. Furthermore, a pattern may be formed by appropriately combining a bright colorant composed of a bright pigment and the like and a colorant composed of a dye, a pigment and the like.

  Note that, as described above, the first pattern layer 2 plays the role of a base pattern of the pattern expressed on the surface of the decorative sheet, so that the first colored layer 2 is formed with a glittering colorant. More preferably. By making the first pattern layer 2 a glitter colored layer formed by a glitter colorant, the combination with the second pattern layer 3 enhances the design of the pattern expressed on the decorative sheet surface and improves the three-dimensional effect. Can be made.

  Bright pigments include pearl pigments (mica and mica fine particles baked with titanium oxide and iron oxide), metal powders (for example, fine particles of copper, aluminum, brass, bronze, gold, silver, etc.) Examples of the binder resin include acrylic resins, styrene resins, polyester resins, urethane resins, chlorinated polyolefin resins, vinyl chloride-vinyl acetate copolymer resins, polyvinyl butyral resins, and alkyd resins. , Petroleum resins, ketone resins, epoxy resins, melamine resins, fluorine resins, silicone resins, fiber derivatives, rubber resins, and the like. These may be used alone or in combination of two or more.

  Examples of the colorant include inorganic pigments such as carbon black, titanium white, zinc white, dial, bitumen, and cadmium red, azo pigments, lake pigments, anthraquinone pigments, quinacridone pigments, phthalocyanine pigments, isoindolinone pigments, dioxazine pigments. Organic pigments such as aluminum powder, metal powder pigments such as aluminum powder and bronze powder, pearlescent pigments such as titanium oxide-coated mica, bismuth oxide chloride, fluorescent pigments, nocturnal pigments, etc. are used alone or in combination of two or more be able to.

  Examples of the solvent (or dispersant) include petroleum organic solvents, ester organic solvents, alcohol organic solvents, ketone organic solvents, ether organic solvents, chlorine organic solvents, and inorganic solvents such as water. It can use individually or in mixture of 2 or more types.

  In the case of forming the first pattern layer 2 using a bright colorant, for example, a gravure printing method, an offset printing method, a screen printing method, a flexographic printing method, an ink jet printing method, a roll coating method, a knife coating method, an air knife. It can be formed by using a conventionally known technique such as a coating method, a die coating method, a lip coating method, a comma coating method, a kiss coating method, a flow coating method, a dip coating method, etc. Alternatively, it may be formed on a part of the base material layer 1.

  Moreover, when forming the 1st pattern layer 2 using a coloring agent instead of a glittering coloring agent, conventionally well-known methods, such as a gravure printing method, an offset printing method, a screen printing method, a flexographic printing method, an inkjet printing method, are mentioned, for example. A desired pattern can be formed on a part or the whole of the base material layer 1 using a technique.

  The thickness of the 1st pattern layer 2 can be suitably selected by the combination with the 2nd pattern layer 3, and there is no restriction | limiting in particular, The thickness at the time of coating is about 1-15 micrometers, and the thickness at the time of drying is 0.1. It is preferable that it is about 10 micrometers.

(Transparent resin layer)
The transparent resin layer 4 is formed between the first pattern layer 2 and the second pattern layer 3, the distance from the surface of the decorative sheet 10 to the first pattern layer 2, and from the surface of the decorative sheet 10 to the second pattern layer 3. This is a layer provided in order to make the decorative sheet 10 have a three-dimensional effect by varying the distance of the pattern layer, making the depth of each pattern layer different.

  The pattern expressed on the surface of the decorative sheet is a pattern in which the second pattern layer 3 and the first pattern layer are combined via the transparent resin layer 4. When the haze value of the transparent resin layer 4 is high, the transparent resin layer 4 It becomes difficult to visually recognize the first pattern layer 2 formed in the lower layer of the first layer. Therefore, the haze value of the transparent resin layer 4 is preferably 60% or less, and more preferably 40% or less. Here, the haze value indicates the ratio of the diffuse transmittance to the total light transmittance when the material to be measured is irradiated with visible light. In addition, transparency is shown, so that this value is low. In the present invention, the haze value is measured in accordance with JIS K 7105.

  The resin used as the transparent resin layer 4 is not particularly limited as long as the above effects can be obtained, and a conventionally known transparent resin layer 4 can be appropriately selected and used. An example of such a transparent resin layer 4 is a thermoplastic resin. Among them, polyolefin resins such as polyethylene, polypropylene, ethylene-propylene copolymer, and olefin thermoplastic elastomer; thermoplastic polyester resins such as polyethylene terephthalate, polybutylene terephthalate, and polyester thermoplastic elastomer; polyvinyl chloride; polystyrene; Polycarbonate; ABS resin; Thermoplastic resin such as acrylic resin can be suitably used. Among these, polyolefin resin and polyester resin are used from the viewpoint of improving the waste material treatment property after use and reducing the environmental load. Can be used more suitably. In addition, it is necessary that the first pattern layer 2 is visible from the decorative sheet surface through the transparent resin layer 4. In consideration of such points, a crystallization nucleating agent is added to the transparent resin layer 4. Preferably it is. By adding a crystallization nucleating agent to the transparent resin layer 4, the crystallization of the resin becomes uniform and the transparency of the transparent resin layer 4 can be improved, and the visibility of the first pattern layer 2 from the surface of the decorative sheet 10 can be improved. Can be improved.

  The method for forming the transparent resin layer 4 is not particularly limited, and can be formed by, for example, a calendar method, an inflation method, a T-die extrusion method, or the like.

  The thickness of the transparent resin layer 4 is not particularly limited, but when the thickness of the transparent resin layer 4 is less than 20 μm, the distance from the decorative sheet surface to the first pattern layer 2 and the distance from the decorative sheet surface to the second pattern layer 3 Therefore, a three-dimensional effect cannot be imparted to the pattern expressed on the surface of the decorative sheet. Considering such points, the thickness of the transparent resin layer 4 is preferably 20 μm or more, and more preferably 30 μm or more and 150 μm or less.

(Transparent primer layer)
As described above, in the present invention, the transparent resin layer 4 is provided between the first pattern layer 2 and the second pattern layer 3, the distance from the surface of the decorative sheet 10 to the first pattern layer 2, and the surface of the decorative sheet 10. By differentiating the distance to the second pattern layer, it is characterized in that the design expressed on the surface of the decorative sheet is given a three-dimensional effect and the design is improved. However, the adhesion between the transparent resin layer 4 and the second pattern layer 3 is low, and when the second pattern layer 3 is simply formed directly on the first pattern layer 2 via the transparent resin layer 4, the decorative sheet 10 The weather resistance of the will be reduced. In the present invention in consideration of such a point, a transparent primer layer 5 having transparency to the extent that the first pattern layer 2 can be visually recognized from the surface of the decorative sheet is provided between the transparent resin layer 4 and the second pattern layer 3. It is further characterized in that The transparent primer layer 5 includes any of colorless and transparent, colored and transparent, as long as it is transparent.

  As described above, the transparent primer layer 5 is provided for the purpose of improving the adhesion strength between the transparent resin layer 4 and the second pattern layer 3 because the first pattern layer 2 can be visually recognized from the surface of the decorative sheet. It is necessary to have adhesion between the resin layer 4 and the second pattern layer 3. Examples of such transparent primer layer 5 include resins such as ester resins, urethane resins, acrylic resins, polycarbonate resins, vinyl chloride-vinyl acetate copolymers, polyvinyl butyral resins, and nitrocellulose resins.

  Moreover, it is preferable that an ultraviolet absorber is added to the transparent primer layer 5. By adding the ultraviolet absorber to the primer layer 5, it is possible to effectively prevent the weather resistance deterioration of the interlayer adhesion strength, and the adhesion between the transparent primer layer 5 and the second pattern layer 3 can be further improved. . As such ultraviolet absorbers, organic ultraviolet absorbers such as benzotriazole, benzophenone, and triazine, and inorganic ultraviolet absorbers such as titanium dioxide, cerium oxide, and organic zinc can be suitably used.

  The thickness of the transparent primer layer 5 is not particularly limited, but is generally about 0.01 μm to 10 μm, preferably about 0.1 μm to 5 μm.

(Second picture layer 3)
The second pattern layer 3 is an essential component of the decorative sheet 10 according to the present invention. The decorative pattern 10 according to the present invention imparts design properties to the decorative sheet 10 and the surface of the decorative sheet by combination with the first pattern layer 2 serving as a base pattern. Is provided as a surface pattern for imparting a three-dimensional effect to the pattern expressed in (1).

  The printing method for forming the pattern constituting the second pattern layer 3 can be performed using the same method as that for the first pattern layer 2, and detailed description thereof is omitted. Further, the pattern of the second pattern layer 3 is not limited and can be appropriately selected and used depending on the combination with the pattern of the first pattern layer 2, so that the first pattern layer 2 can be seen. By using a pattern having a concealing property in part, a three-dimensional expression is possible. For example, when the first pattern layer 2 is formed with a glittering pearl ink and the stone pattern is formed on the second pattern layer 3, the glittering pearl ink is used at a position far from the surface of the decorative sheet. It is possible to express the second pattern layer 3 made of a stone pattern formed near the surface of the decorative sheet so that the first pattern layer 2 formed has a sense of depth. Moreover, when the 1st pattern layer 2 and the 2nd pattern layer 3 are formed so that a color density may differ, the depth of the surface of the decorative sheet 10 can be given, and a three-dimensional effect can be given.

  In addition to the second pattern layer 3, a plurality of other pattern layers may be provided on the decorative sheet 10, and after the other pattern layers are directly laminated on the first pattern layer 2, the transparent resin layer 4 The second pattern layer 3 may be laminated through the transparent primer layer 5. Moreover, it is good also as providing a some pattern layer and providing the transparent resin layer 4 and the transparent primer layer 5 between each pattern layers. That is, according to the present invention, the transparent resin layer 4 and the transparent primer layer 5 are provided between the pattern layers so that the distance from the surface of the decorative sheet 10 to each of the pattern layers is different, and the pattern expressed on the surface of the decorative sheet is three-dimensional. It is sufficient to provide the transparent resin layer 4 and the transparent primer layer 5 between the pattern layers to which a three-dimensional effect is desired.

  The thickness of the second pattern layer 3 can be appropriately selected depending on the combination with the first pattern layer 2 and is not particularly limited, but the thickness at the time of coating is about 0.2 to 10 μm, and the thickness at the time of drying is 0.00. It is preferable that it is about 1-5 micrometers.

(Surface protective layer)
The surface protective layer 6 is a layer provided to give the decorative sheet 10 surface properties such as scratch resistance, abrasion resistance, water resistance, and weather resistance, and is formed on the outermost surface of the decorative sheet 10.

  The resin constituting the surface protective layer 6 is preferably a curable resin such as an ionizing radiation curable resin or a thermosetting resin, and more preferably an ionizing radiation curable resin. The ionizing radiation curable resin can have a higher crosslink density than the thermosetting resin, so it has better scratch resistance than the thermosetting resin and is obtained by pasting a decorative sheet. Even when stacked and transported, the surface of the decorative sheet is hardly scratched. In addition, after the surface protective layer 6 is cured, it is possible to form a good concavo-convex pattern by embossing with hot pressure from above, and the adhesion with the transparent primer layer 5 is also improved.

  The ionizing radiation curable resin is a composition that can be cured by ionizing radiation such as an electron beam or ultraviolet rays, and specifically, a prepolymer having a radical polymerizable unsaturated bond or a cationic polymerizable functional group in the molecule. Compositions that can be cured by ionizing radiation (including so-called oligomers) and / or monomers appropriately mixed are preferably used. These prepolymers or monomers are used alone or in combination. The curing reaction is usually a crosslinking curing reaction.

  Specifically, the prepolymer or monomer is a compound having a radically polymerizable unsaturated group such as a (meth) acryloyl group or (meth) acryloyloxy group, a cationically polymerizable functional group such as an epoxy group in the molecule. Become. A polyene / thiol-based prepolymer based on a combination of polyene and polythiol is also preferably used. For example, the (meth) acryloyl group means an acryloyl group or a methacryloyl group. Examples of the prepolymer (oligomer) having a radically polymerizable unsaturated group include urethane (meth) acrylate, polyester (meth) acrylate, epoxy (meth) acrylate, melamine (meth) acrylate, triazine (meth) acrylate, silicone ( A (meth) acrylate etc. can be used. The molecular weight is usually about 250 to 100,000.

  Further, an electron beam curable resin is preferable as the ionizing radiation curable resin. This is because the electron beam has less relation between the curing reaction speed and the temperature than ultraviolet rays, and is less affected by sheet heating, and the processing speed can be easily improved by high-speed curing. Furthermore, in order to improve the weather resistance, the addition of an ultraviolet absorber that is advantageous or indispensable to the surface protective layer has the advantage that the ultraviolet absorber can be added without affecting the curing. It is because it is obtained. Therefore, it is advantageous also in terms of weather resistance.

  The method for forming the surface protective layer 6 is not particularly limited, and for example, an ionizing radiation curable resin or a two-component curable urethane resin can be applied by a known coating method such as gravure coating or roll coating. .

In addition, as ionizing radiation, the electromagnetic wave or charged particle which has the energy which can carry out the hardening reaction of the molecule | numerator in ionizing radiation curable resin (composition) is used. Usually used are ultraviolet rays or electron beams, but in addition, visible light, X-rays, ion rays and the like can also be used. As the ultraviolet light source, 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, a metal halide lamp or the like is used. As a wavelength of ultraviolet rays, a wavelength range of 190 to 380 nm is mainly used. As the electron beam source, various electron beam accelerators such as a cockcroft Walton type, a bandegraft type, a resonant transformer type, an insulated core transformer type, a linear type, a dynamitron type, a high frequency type, etc. are used, preferably 100 to 1000 keV, preferably That irradiates electrons having energy of 100 to 300 keV is used.

The thickness of the surface protective layer 6 is not particularly limited and can be appropriately set according to the use of the decorative sheet 10 and is generally 1 μm to 20 μm.

  Moreover, in order to improve the physical properties of the surface protective layer 6, additives such as a solvent, an antioxidant, a dispersant, a light stabilizer, a gloss adjuster, an antiblocking agent, and a lubricant may be appropriately blended and added. .

(Embossing)
The decorative sheet 10 may be embossed from the surface protective layer side. The embossing is performed to give the decorative sheet 10 a desired texture such as a wood grain pattern. For example, after the surface protective layer 6 is heated and softened on a heating drum, it is further heated to 140 to 170 ° C. with an infrared radiation heater, pressed and shaped with an embossed plate having an uneven pattern of a desired shape, and cooled and fixed. To give a texture. Embossing can be performed with a known single wafer or rotary embossing machine.

  Examples of the embossed concavo-convex pattern include a wood grain conduit groove, a float pattern (a concavo-convex pattern of a raised annual ring), a hairline, a grain, and a satin texture. Further, when embossing is performed, ink may be filled in the embossed recesses by wiping as necessary. For example, the embossed recess can be filled with ink while scratching the surface with a doctor blade. As the ink to be filled (wiping ink), usually, an ink having a two-component curable urethane resin as a binder can be used. In particular, by performing a wiping process on the grain conduit groove irregularities, a design closer to the actual grain can be expressed, and the commercial value of the decorative sheet 10 can be increased.

(Synthetic resin layer)
Moreover, as shown in FIG. 1, it is good also as laminating | stacking the synthetic resin layer 7 on the other surface (in the case of FIG. 1, lower side) of the base material layer 1. As shown in FIG. By laminating the synthetic resin layer 7 on the other surface of the base material layer 1, the surface of the decorative sheet 10 is imparted with a uniform smoothness, good scratch resistance, etc. In this case, the impact resistance and caster resistance can be improved and the stereoscopic effect can be further improved.

  The synthetic resin layer 7 may be a single layer or may be composed of two or more layers. When the number of layers is two or more, for example, a known method such as an extrusion method can be appropriately selected for lamination.

  The material of the synthetic resin layer is not particularly limited. For example, polyethylene (high density polyethylene, medium density polyethylene, low density polyethylene), vinyl chloride resin, polystyrene, polypropylene, methacrylic resin, acrylonitrile styrene resin, polyamide resin, acrylonitrile butadiene styrene resin. , Polyimide resin, polyamideimide resin, fluororesin, urethane resin, polysulfone, polycarbonate, polyacetal, polyphenylene ether, polyethylene naphthalate (PEN), polybutylene terephthalate (PET), polyarylate and the like.

  The thickness of the synthetic resin layer is not particularly limited, but generally about 150 to 600 μm is preferable, and about 200 μm to 500 μm is more preferable.

(Transparent adhesive layer)
Moreover, as shown in FIG. 1, it is good also as laminating | stacking the 1st pattern layer 2 or the 2nd pattern layer 3, and the transparent resin layer 4 via the transparent adhesive layer 8. FIG. By providing the transparent adhesive layer 8 between the first pattern layer 2 or the second pattern layer 3 and the transparent resin layer 4, the adhesion between the first pattern layer 2 or the second pattern layer 3 and the transparent resin layer 4 is improved. Can be improved.

  The transparent adhesive layer 8 is formed by applying a transparent adhesive to the pattern layer (first pattern layer 2 or second pattern layer 3) side or the transparent resin layer 4 side, and drying, and then superimposing both sheets. It is crimped and laminated and integrated. As the adhesive, a conventionally known adhesive can be used. For example, a thermosetting or ultraviolet curable adhesive made of an acrylic, urethane, polyester, or polyvinyl acetate resin can be used.

  The thickness of the transparent adhesive layer 8 is not particularly limited, but the thickness after drying is generally 0.1 to 30 μm.

(Floor material)
Moreover, the decorative sheet 10 of the present invention can be used as a flooring material (not shown) by bonding with various adherends. The material of the adherend is not particularly limited, and examples thereof include inorganic non-metallic materials, metallic materials, wooden materials, and plastic materials. Specifically, paper-making cement, extruded cement, slag cement, ALC (lightweight cellular concrete), GRC (glass fiber reinforced concrete), pulp cement, wood chip cement, asbestos cement, calcium oxalate, plaster Non-ceramic ceramic materials such as gypsum slag, ceramic materials such as earthenware, earthenware, porcelain, setware, glass and glazing. Examples of the metal material include metal materials (metal steel plates) such as iron, aluminum, and copper. In addition, examples of the wood-based material include veneer, plywood, particle board, fiberboard, and laminated wood made of cedar, straw, firewood, lawan, teak, and the like. Examples of the plastic material include resin materials such as polypropylene, ABS resin, and phenol resin.

  Moreover, the shape of such an adherend is not particularly limited, and can be appropriately selected and used according to the purpose of use of the flooring. In general, a flat plate may be used in consideration of installation on a flooring or the like.

  In addition, after joining the decorative sheet 10 of the present invention and the adherend, for example, according to the characteristics of the final product, cutting, using a tenoner, applying a sword, applying a V-shaped groove, chamfering four sides, etc. May be.

  Thus, according to the flooring of the present invention formed by joining the decorative sheet 10 and the adherend, it has weather resistance and can impart a three-dimensional effect to the pattern expressed on the flooring surface. A flooring excellent in design can be obtained.

  Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples.

Example 1
It consists of a printing ink composed of a two-component curable acrylic-urethane resin on the upper surface of a polypropylene-based colored resin (thickness 60 μm) subjected to double-sided corona treatment as the base material layer 1, and an acrylic-urethane resin to which a glittering material is added. The first pattern layer 2 is formed by a gravure coating method with printing ink, and a thickness of 80 μm is obtained by a T-die extruder through a urethane adhesive (thickness 3 μm) as a transparent adhesive layer 8 thereon. A transparent resin layer 4 was formed by extruding a polypropylene resin. Next, a transparent urethane layer 5 is formed by applying a solution containing a polyurethane urethane / acrylic copolymer / acrylic polyol added with a triazine UV absorber to a thickness of 2 μm by a gravure coating method, A second pattern layer 3 is formed by gravure printing using a printing ink made of one liquid acrylic-urethane resin, and a transparent adhesive layer 8 (thickness 3 μm) and a transparent resin layer similar to the above are formed thereon. 4 (thickness 80 μm) and transparent primer layer 5 (thickness 2 μm) were sequentially laminated. Next, on the transparent primer layer 5, an electron radiation curable resin layer as a surface protective layer 6 is applied and dried so as to have a thickness of 15 μm after drying by a roll coating method, and an uncured electron radiation curable resin layer is formed. The surface protective layer 6 is formed and cured by irradiating the uncured electron beam radiation resin layer with an electron beam (acceleration voltage 125 KeV, 5 Mrad) in an environment having an oxygen concentration of 200 ppm or less. Embossing was performed from the 6th side to form an uneven pattern. Then, a backer layer (2 μm) is formed on the lower surface of the base material layer 1 by thermally laminating polypropylene extruded to a thickness of 250 μm to form a backer layer, and further a urethane resin solution is formed by a gravure coating method. A decorative sheet of Example 1 was prepared.

(Example 2)
A 12 mm × 945 mm wide × 1840 mm long plywood was coated with 8 g / scale ² of BA-10L / BA-11B adhesive manufactured by Chuo Rika Kogyo on the plywood surface, and the decorative sheet produced in Example 1 was bonded to the flooring. Was made.

(Comparative example)
A decorative sheet of a comparative example was prepared by the same method except for the transparent resin layer 4 and the transparent primer layer 5 of Example 1.

(Picture visibility test)
The pattern visibility test of the decorative sheet of Example 1 and the comparative example and the flooring material of Example 2 was performed. In the pattern visibility test, it was visually determined whether or not the patterns constituting the first pattern layer 2 and the second pattern layer 3 could be recognized from the surface of the decorative sheet (floor material in Example 2). At this time, the case where both the pattern layers of the first pattern layer 2 and the second pattern layer 3 were able to be seen well was marked as ◎. The evaluation results are shown in Table 1.

(Steridity evaluation test)
The three-dimensionality evaluation test of the decorative sheet of Example 1 and Comparative Example and the flooring material of Example 2 was performed. The three-dimensionality evaluation test is performed by visually checking the depth and three-dimensionality of the pattern expressed on the decorative sheet surface (floor material in Example 2). X. The evaluation results are shown in Table 1.

(Evaluation results)
As is clear from Table 1, the decorative sheet of Example 1 and the flooring material of Example 2 in which the transparent resin layer 4 and the transparent primer layer 5 are provided between the first pattern layer 2 and the second pattern layer 3 are as follows. Like the decorative sheet of the comparative example in which the transparent resin layer 4 and the transparent primer layer 5 are not provided between the pattern layers, the pattern constituting the first pattern layer and the second pattern layer 3 can be visually recognized from the surface of the decorative sheet (floor material). And good visibility was shown.

  Further, as is clear from Table 1, a transparent resin layer 4 is provided between the first pattern layer 2 and the second pattern layer 3, and the distance from the decorative sheet surface to the first pattern layer 2, and the decorative sheet surface The decorative sheet of Example 1 and the flooring material of Example 2 with different distances from the second pattern layer 3 can give a three-dimensional effect to the pattern expressed on the surface of the decorative sheet (floor material). It was. On the other hand, the decorative sheet of the comparative example in which there is almost no difference between the distance from the decorative sheet surface to the first pattern layer 2 and the distance from the decorative sheet surface to the second pattern layer 3 has a three-dimensional effect on the pattern expressed on the decorative sheet surface. It was confirmed that there was no.

  From the above results, the decorative sheet 10, the decorative sheet 10, and the adherend of the present invention in which the transparent resin layer 4 and the transparent primer layer 5 having transparency are provided between the first pattern layer 2 and the second pattern layer 3. With the floor material formed by joining the first and second pattern layers 2 and 3 from the surface of the decorative sheet (floor material), the visibility of the first pattern layer 2 and the second pattern layer 3 is not lowered on the surface of the decorative sheet (floor material). A pattern in which one pattern layer 2 and the second pattern layer 3 are combined can be expressed in a three-dimensional manner, and a three-dimensional effect is imparted to the decorative sheet 10 and the floor material formed by joining the decorative sheet 10 and the adherend. In addition, the design can be improved.

It is a schematic sectional drawing of the decorative sheet of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base material layer 2 ... 1st pattern layer 3 ... 2nd pattern layer 4 ... Transparent resin layer 5 ... Transparent primer layer 6 ... Surface protective layer 7 ... Synthetic resin layer 8 ... Transparent adhesive layer 10 ... Cosmetic sheet

Claims (6)

A decorative sheet formed by laminating a first pattern layer, a second pattern layer, and a surface protective layer formed on the outermost surface in this order on one surface of the base material layer,
A decorative sheet, wherein at least a transparent resin layer and a transparent primer layer are laminated in this order between the first pattern layer and the second pattern layer.   The decorative sheet according to claim 1, wherein the first pattern layer is a glittering colored layer.   The decorative sheet according to claim 1 or 2, wherein the transparent primer layer contains an ultraviolet absorber.   The decorative sheet according to any one of claims 1 to 3, wherein the surface protective layer is an ionizing radiation curable resin layer.   The decorative sheet according to any one of claims 1 to 4, wherein a synthetic resin layer is laminated on the other surface of the base material layer. It is a flooring made by sticking a decorative sheet and an adherend,
The flooring material, wherein the decorative sheet is the decorative sheet according to any one of claims 1 to 5.

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