JP2009228335A - Decorative material for floor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative material for a floor capable of obtaining a good coating feeling regardless of shading of a color tone desired to be expressed while a knife-mark problem is solved. <P>SOLUTION: The decorative material for a floor has a decorative sheet 3 laminated on a wooden plate 1 with an adhesive layer 6 interposed therebetween. (1) the decorative material for the floor has a groove 4 and/or a chamfering part on the decorative sheet side. (2) the groove and the chambering part are coated with a pigment coating material 5. (3) the adhesive layer 6 contains the pigment coating material 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a flooring decorative material in which a colored coating is applied to a groove portion or a chamfered portion.

  Conventionally, as a flooring decorative material, a flooring decorative material in which a decorative sheet including a synthetic resin layer is laminated on a wooden board is known (Patent Document 1, etc.). And in order to improve the designability, these flooring decorative materials are often provided with grooves and chamfers on the decorative sheet side.

  The groove and chamfered portions are generally painted with a colored paint, but if the color tone is light, the ground color of the wooden board cannot be sufficiently concealed, and the target color tone may not be obtained. Moreover, when a coating area | region straddles both a wooden board and a decorative sheet, a difference arises in the coating feeling of a wooden board and a decorative sheet, and a coating spot may arise. In addition, there exists patent document 2 etc. regarding the coating of a groove part and a chamfering part, for example.

  On the other hand, there is a method of adding a colorant to an adhesive layer that bonds a wooden board and a decorative sheet as a method for imparting a feeling of painting to a groove or chamfered portion without painting. This method is effective when the groove or chamfer is shallow and does not reach the wood board. However, even in this method, when the color tone of the colorant is light, the ground color of the wooden board cannot be sufficiently concealed, and the target color tone may not be obtained. Moreover, when forming a groove part or a chamfered part, a so-called knife mark remains in the synthetic resin layer included in the decorative sheet, and there is a possibility that a glare feeling may remain in the product due to irregular reflection of light. The knife mark means a wavy cutting trace remaining on the cutting surface when a circular knife cuts the synthetic resin layer when forming a groove or chamfer.

Accordingly, there is a demand for the development of a decorative material for floors that can provide a good coating feeling regardless of the shade of the color tone to be expressed and further eliminates the problem of knife marks.
JP 2004-17590 A JP-A-2005-313142

  The present invention solves the above-mentioned problems of the prior art, and provides a decorative material for floors that can provide a good coating feeling regardless of the shade of the color tone to be expressed and further eliminates the problem of knife marks. Objective.

  As a result of intensive research, the inventor has achieved that the object can be achieved by coating the groove and chamfered portion with a colored paint and containing a colorant in the adhesive layer that bonds the wooden board and the decorative sheet. The headline and the present invention were completed.

That is, the present invention relates to the following floor decorative material.
1. A decorative material for floors in which a decorative sheet is laminated on a wooden board via an adhesive layer,
(1) The decorative material for floor has a groove part and / or a chamfered part on the decorative sheet side,
(2) The groove portion and the chamfered portion are painted with a colored paint,
(3) The adhesive layer contains a colorant,
A decorative material for floors.
2. Item 2. The floor decorative material according to Item 1, wherein the decorative sheet has a synthetic resin layer having a thickness of 100 µm or more in a lowermost layer.
3. Item 3. The floor decorative material according to Item 1 or 2, wherein the groove and the chamfered portion coated with the colored paint have the same color tone as the adhesive layer containing the colorant.

Hereinafter, the floor decorative material of the present invention will be described in detail.

The floor decorative material of the present invention has a decorative sheet laminated on a wooden board via an adhesive layer,
(1) The decorative material for floor has a groove part and / or a chamfered part on the decorative sheet side,
(2) The groove portion and the chamfered portion are painted with a colored paint,
(3) The adhesive layer contains a colorant,
It is characterized by that.

  The floor decorative material of the present invention having the above-described features has a groove portion and a chamfered portion coated with a colored paint, and the adhesive layer further contains a colorant. However, the base color of the wooden board is sufficiently concealed and a good paint feeling is obtained. Moreover, the difference in a feeling of painting is suppressed also when applying across both a wooden board and a decorative sheet. Furthermore, the problem of the knife mark is solved because the groove and the chamfered portion are coated.

Hereinafter, each structure of the decorative material for floors of this invention is demonstrated.
(Wood board)
Examples of the wooden board include a single board made of wood such as cedar, straw, lawan, teak, and the like, a wooden board such as particle board and medium density fiber board (MDF).

The thickness of the wood board is not particularly limited, but is preferably about 3 to 15 mm, and more preferably about 6 to 12 mm.
(Adhesive layer)
The adhesive layer contains a colorant and adheres the wooden board and the decorative sheet.

  The adhesive layer is formed using a known adhesive that can be applied to a wood material and containing a colorant. Examples of the adhesive include polyvinyl acetate, polyvinyl chloride, vinyl chloride / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ionomer, butadiene / acrylonitrile rubber, neoprene rubber, natural rubber, and the like as active ingredients. Adhesives to be used.

  Examples of the colorant include inorganic pigments such as titanium white, zinc white, petal, vermilion, ultramarine blue, cobalt blue, titanium yellow, and carbon black, isoindolinone, Hansa Yellow A, quinacridone, permanent red 4R, phthalocyanine blue, Examples include organic pigments (including dyes) such as Induslen Blue RS and aniline phosphorus, metal pigments such as aluminum and brass, pearlescent pigments made of foil powder such as titanium dioxide-coated mica and basic lead carbonate, etc. It is done. These can be used alone or in combination of two or more. Although content of a coloring agent can be suitably set according to coloring shade, etc., about 1 to 20 weight% is preferable in an adhesive bond layer.

Although the thickness of an adhesive bond layer is not limited, About 0.1-50 micrometers is preferable.
(Decorative sheet)
Although it does not limit as a decorative sheet, For example, what has a pattern layer (solid ink layer / pattern ink layer), a transparent resin layer, and a surface protective layer in order on a base material sheet is preferable.

  The base sheet is 1) paper such as thin paper, fine paper, kraft paper, Japanese paper, titanium paper, resin-impregnated paper, inter-paper reinforced paper, etc. 2) wood fiber, glass fiber, asbestos, polyester fiber, vinylon fiber, rayon Examples thereof include one or two or more laminates of woven or non-woven fabric made of fibers and the like, and 3) sheets of synthetic resin such as polyolefin, polyester, polyacryl, polyamide, polyurethane, and polystyrene.

  As for the thickness of a base material sheet, about 20-300 micrometers is preferable. The base sheet may be colored or non-colored. Further, the surface may be subjected to surface treatment such as corona discharge treatment, plasma treatment, or ozone treatment.

  The pattern layer is composed of a pattern ink layer and / or a solid ink layer. The pattern layer can be formed by a printing method such as gravure printing, offset printing or silk screen printing. Examples of the pattern of the pattern ink layer include a wood grain pattern, a stone pattern, a cloth pattern, a skin pattern, a geometric pattern, characters, symbols, line drawings, various abstract patterns, and the like. The solid ink layer is obtained by solid printing of colored ink. The pattern layer is composed of one or both of a pattern ink layer and a solid ink layer.

  As the ink used for the pattern layer, as a vehicle, chlorinated polyolefin such as chlorinated polyethylene and chlorinated polypropylene, polyester, polyurethane composed of isocyanate and polyol, polyacryl, polyvinyl acetate, polyvinyl chloride, and vinyl chloride-vinyl acetate are used. A polymer, a cellulose-based resin, a polyamide-based resin, or the like may be used alone or in combination, and a pigment, a solvent, various auxiliary agents, and the like may be added thereto to make an ink. Among these, from the viewpoint of environmental problems, adhesion to the printing surface, and the like, one or a mixture of two or more of polyester, polyurethane composed of isocyanate and polyol, polyacryl, polyamide-based resin, and the like is preferable.

  A transparent resin layer will not be specifically limited if it is a transparent resin layer, For example, it can form suitably with a transparent thermoplastic resin.

  Specifically, soft, semi-rigid or rigid polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-acrylic acid ester copolymer Examples include polymers, ionomers, acrylic esters, and methacrylic esters. Among the above, polyolefin resins such as polypropylene are preferable.

  The transparent resin layer may be colored. In this case, a colorant may be added to the thermoplastic resin. As the coloring material, pigments or dyes used in the picture layer can be used.

  For the transparent resin layer, fillers, matting agents, foaming agents, flame retardants, lubricants, antistatic agents, antioxidants, UV absorbers, light stabilizers, radical scavengers, soft components (eg rubber) Various additives such as may be included.

  The surface protective layer (transparent surface protective layer) is provided for imparting surface physical properties such as scratch resistance, abrasion resistance, water resistance and stain resistance required for a decorative sheet. As the resin forming the surface protective layer, a curable resin such as a thermosetting resin or an ionizing radiation curable resin is preferable. In particular, ionizing radiation curable resins are preferable from the viewpoints of high surface hardness, productivity, and the like.

  Examples of thermosetting resins include unsaturated polyester resins, polyurethane resins (including two-component curable polyurethane), epoxy resins, amino alkyd resins, phenol resins, urea resins, diallyl phthalate resins, melamine resins, guanamine resins, and melamines. -Urea co-condensation resin, silicon resin, polysiloxane resin and the like.

  A curing agent such as a crosslinking agent and a polymerization initiator, and a polymerization accelerator can be added to the resin. For example, as curing agents, isocyanates, organic sulfonates, etc. can be added to unsaturated polyester resins, polyurethane resins, etc., organic amines, etc. can be added to epoxy resins, peroxides such as methyl ethyl ketone peroxide, azoisobutyl nitrile, etc. A radical initiator can be added to the unsaturated polyester resin.

  Examples of the method for forming the surface protective layer with a thermosetting resin include a method in which a solution of a thermosetting resin is applied by a coating method such as a roll coating method or a gravure coating method and then dried and cured. The coating amount of the solution is about 5 to 30 μm, preferably about 5 to 20 μm in terms of solid content.

  The ionizing radiation curable resin is not limited as long as it is a resin that undergoes a crosslinking polymerization reaction upon irradiation with ionizing radiation and changes to a three-dimensional polymer structure. For example, one or more prepolymers, oligomers and monomers having a polymerizable unsaturated bond or epoxy group that can be crosslinked by irradiation with ionizing radiation in the molecule can be used. Examples thereof include acrylate resins such as urethane acrylate, polyester acrylate, and epoxy acrylate; silicon resins such as siloxane; polyester resins; epoxy resins and the like.

  Examples of the ionizing radiation include visible light, ultraviolet light (near ultraviolet light, vacuum ultraviolet light, etc.), X-rays, electron beams, ion beams, etc. Among them, ultraviolet light and electron beams are preferable.

  As the ultraviolet light source, a light source such as an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc lamp, a black light fluorescent lamp, or a metal halide lamp can be used. The wavelength of the ultraviolet light can be about 190 to 380 nm.

  As the electron beam source, various electron beam accelerators such as a cockcroft-wald type, a bandegraft type, a resonant transformer type, an insulating core transformer type, a linear type, a dynamitron type, and a high frequency type can be used. The energy of the electron beam is preferably about 100 to 1000 keV, more preferably about 100 to 300 keV. The irradiation amount of the electron beam is preferably about 2 to 15 Mrad.

  The ionizing radiation curable resin is sufficiently cured when irradiated with an electron beam, but it is preferable to add a photopolymerization initiator (sensitizer) when it is cured by irradiation with ultraviolet rays.

  Photopolymerization initiators in the case of resin systems having radically polymerizable unsaturated groups include, for example, acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ether, Michler benzoylbenzoate, Michler ketone, diphenyl sulfide, dibenzyl disulfide , Diethyl oxide, triphenylbiimidazole, isopropyl-N, N-dimethylaminobenzoate and the like can be used. In the case of a resin system having a cationic polymerizable functional group, for example, at least one kind such as an aromatic diazonium salt, an aromatic sulfonium salt, a metallocene compound, a benzoin sulfonic acid ester, and a freeloxysulfoxonium diallyl iodosyl salt. Can be used.

  Although the addition amount of a photoinitiator is not specifically limited, Generally it is about 0.1-10 weight part with respect to 100 weight part of ionizing radiation curable resins.

  As a method for forming a protective layer with an ionizing radiation curable resin, for example, a solution of an ionizing radiation curable resin may be applied by a coating method such as a gravure coating method or a roll coating method. The coating amount of the solution is generally about 5 to 30 μm, preferably about 5 to 20 μm as a solid content.

  In order to further impart scratch resistance and abrasion resistance to the surface protective layer formed from the ionizing radiation curable resin, an inorganic filler may be blended. Examples of inorganic fillers include powdered aluminum oxide, silicon carbide, silicon dioxide, calcium titanate, barium titanate, magnesium pyroborate, zinc oxide, silicon nitride, zirconium oxide, chromium oxide, iron oxide, boron nitride, Examples include diamond, gold sand and glass fiber.

  The addition amount of the inorganic filler is about 1 to 80 parts by weight with respect to 100 parts by weight of the ionizing radiation curable resin.

  Lamination of each layer is, for example, by forming a pattern layer (solid ink layer, pattern ink layer) on one side of the base sheet by printing in order, and then bonding a known dry lamination such as a two-component curable urethane resin on the pattern layer. A transparent resin layer can be laminated by a dry lamination method, a T-die extrusion method, or the like through an agent, and a surface protective layer can be formed.

  An uneven pattern may be formed by embossing from the surface protective layer side. The concavo-convex pattern can be formed by heating press, hairline processing or the like. Examples of the uneven pattern include a conduit groove, a stone plate surface unevenness, a cloth surface texture, a satin finish, a grain, a hairline, and a line groove.

The decorative sheet may have a synthetic resin layer (so-called backer layer) having a thickness of 100 μm or more in the lowermost layer (layer that adheres to the wooden board). In addition, a backer layer means the buffer layer aiming at shock absorption etc. in the decorative material for floors. Examples of the material constituting the backer layer include polypropylene, ethylene-vinyl alcohol copolymer, polymethylene, polymethylpentene, polyethylene terephthalate, and high heat-resistant polyalkylene terephthalate [for example, a part of ethylene glycol is 1,4- Polyethylene terephthalate substituted with cyclohexanedimethanol or diethylene glycol, so-called trade name PET-G (manufactured by Eastman Chemical Company)], polybutylene terephthalate, polyethylene naphthalate, polyethylene naphthalate-isophthalate copolymer, polycarbonate, poly Examples include arylate, polyimide, polystyrene, polyamide, and ABS. These resins can be used alone or in combination of two or more. Although the upper limit of the thickness of a backer layer is not limited, 300-600 micrometers is suitable.
(Groove and chamfer)
The floor decorative material of the present invention has a groove and / or a chamfered portion on the decorative sheet side, and these are painted with a colored paint.

  The groove portion and the chamfered portion are formed, for example, by grooving and chamfering a flooring decorative material using a cutting tool such as a tenoner. The depth of the groove and chamfering is not limited, and may be a depth that stays on the inner surface of the decorative sheet or a depth that reaches the wood board. Such processing depth is appropriately set according to desired design properties.

  In particular, when grooving and / or chamfering has reached the wooden board, the colored paint soaks into the wooden board, so the paint color may be slightly different between the processed surface of the decorative sheet and the processed surface of the wooden board. In the present invention, since the colorant is also added to the adhesive layer, the difference in color tone is hardly noticeable.

  As the colored paint for coating the groove and the chamfered portion, for example, an ink can be used by dissolving or dispersing a colorant that can also be used in the adhesive layer in a vehicle. Examples of the colorant are the same as described above. As the vehicle, for example, chlorinated polyolefin such as chlorinated polyethylene and chlorinated polypropylene, polyester, polyurethane composed of isocyanate and polyol, polyacryl, polyvinyl acetate, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, cellulose series Examples thereof include resins and polyamide resins. These vehicles can be used individually or in mixture of 2 or more types. In addition, a solvent, an adjuvant, etc. can also be added to the colored paint as necessary.

  It is preferable that the groove part and the chamfered part coated with the colored paint have the same color tone as that of the adhesive layer containing the colorant. As a result, the base color of the wooden board can be sufficiently concealed, and a good coating feeling can be obtained without coating spots.

  The floor decorative material of the present invention will be specifically described with reference to FIGS.

  The floor decorative material shown in FIG. 1 has a structure in which a synthetic resin backer layer 2 and a decorative sheet 3 are laminated on a wooden board 1 via a colored adhesive layer 6, and the wooden board 1 from the decorative sheet 3 side. The groove part 4 which reaches is provided. A colored coating film 5 is formed on the surface of the groove 4.

  The floor decorative material shown in FIG. 2 has an adhesive layer 24, a primer layer 25, a base material sheet 26, a solid ink layer 27, a pattern ink layer 28, an adhesive layer 29, and a transparent resin on a synthetic resin backer layer 23. The layer 30, the primer layer (not shown), and the surface protective layer 31 are sequentially laminated. Embossing is performed from the surface protective layer side, and a concave embossed portion 32 is provided. On the other hand, on the back surface of the synthetic resin backer layer, a wood board 21 is laminated via a colored adhesive layer 22. And in this flooring, the groove part 20 which reaches the wooden board 21 from the decorative sheet side is provided.

  The floor decorative material of the present invention has a groove portion and a chamfered portion coated with a colored paint, and further, since the adhesive layer contains a colorant, due to the synergistic effect of both, even if the color of the paint is light, The base color is sufficiently concealed and a good paint feeling is obtained. Moreover, even when it coats over both a wooden board and a decorative sheet, the difference in a coating feeling is suppressed. Furthermore, the problem of the knife mark is solved because the groove and the chamfered portion are coated.

  Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited to the examples.

Example 1
(Making a decorative sheet)
A urethane / nitrified cotton primer layer (2 g / m ² as solid content) is formed on one surface of a colored polypropylene film having a thickness of 60 μm that has been subjected to a corona discharge treatment on both sides by gravure printing, and two liquids are formed on the other surface. An adhesive composed of a two-component curable urethane resin on the entire surface of the pattern printing layer after a solid pattern printing layer and a solid pattern printing layer are formed on the solid pattern printing layer by a gravure printing method with a curable urethane printing ink. Forming a layer (2 g / m ² as a solid content), a polypropylene thermoplastic elastomer having a benzotriazole ultraviolet absorber and a hindered amine radical scavenger added to the adhesive layer surface is heated and melt extruded with a T-die extruder, A transparent resin layer having a thickness of 80 μm is formed, and then a concave pattern is formed on the surface of the transparent resin layer with an embossed plate of wood grain conduit pattern. Le / urethane block copolymer as a main component, by applying a two-component curable urethane resin added the isocyanate to form a transparent primer layer (1 g / m 2 as solid ^content) as a curing agent, further clear primer layer over the entire surface A urethane acrylate ionizing radiation curable resin was applied to the substrate and irradiated with an electron beam (acceleration voltage: 175 KeV, irradiation amount: 5 MRad) to form a transparent surface protective layer (15 g / m ² as a solid content). Furthermore, by providing a polyethylene terephthalate backer layer (thickness: 400 μm) on the urethane / nitrified cotton-based primer layer with an adhesive (solid content: about 6 g / m ² ) made of a two-component curable urethane resin, A decorative sheet was prepared.
(Create flooring materials)
12g x 945mm width x 1840mm long plywood, 8g / scale ² adhesive with 5 parts of light colored pigment (T-60 made by Chuo Rika Kogyo Co., Ltd.) added to Chuo Rika Kogyo's BA-11 / BA-11B The decorative sheet was pasted together.

  Furthermore, after splitting into three with a gang saw, grooving and chamfering was performed with a tenoner. Groove processing and chamfering were performed at a depth reaching the plywood from the decorative sheet side.

  Furthermore, a coloring material was applied to the groove and the chamfered portion with a light colored paint (W-SF, manufactured by Showa Ink Industry) in a painting line to obtain a flooring decorative material.

Comparative Example 1
A flooring decorative material was obtained in the same manner as in Example 1 except that no colorant was added to the adhesive.

Comparative Example 2
A flooring decorative material was obtained in the same manner as in Example 1 except that the groove portion and the chamfered portion were not colored.

Test example 1
The flooring materials prepared in Example 1 and Comparative Examples 1 and 2 were examined for the color feeling (presence / absence of colored spots, presence / absence of desired color tone) of the grooves and chamfers. Moreover, the presence or absence of the designability fall by the knife mark of a groove part and a chamfering part was investigated. The evaluation criteria are as follows.

Color evaluation:
○: The base color of the wooden board is sufficiently concealed, and there is no unevenness in color.
Δ: Slightly affected by the base color of the wooden board, and the color tone in the groove (sheet portion and wood portion) is slightly uneven.
×: Under the influence of the base color of the wooden board, the target groove color cannot be expressed, and the color tone (sheet portion and wood portion) in the groove is uneven.

Appearance evaluation:
○: No deterioration in design due to knife marks.
Δ: Designability is reduced due to the knife mark.
X: The feeling of glare due to the knife mark is large and the design is poor.
The results are shown in Table 1.

It is a schematic diagram (an example) of the decorative material for floors of the present invention. It is a schematic diagram (an example) of the decorative material for floors of the present invention.

Explanation of symbols

1. Wood board 2. 2. Synthetic resin backer layer Cosmetic sheet 4. 4. Groove part 5. Colored coating film Colored adhesive layer 20. Groove 21. Wood board 22. Colored adhesive layer 23. Synthetic resin backer layer 24. Adhesive layer 25. Primer layer 26. Base sheet 27. Solid ink layer 28. Pattern ink layer 29. Transparent adhesive layer 30. Transparent resin layer 31. Surface protective layer 32. Embossed part

Claims (3)

A decorative material for floors in which a decorative sheet is laminated on a wooden board via an adhesive layer,
(1) The decorative material for floor has a groove part and / or a chamfered part on the decorative sheet side,
(2) The groove portion and the chamfered portion are painted with a colored paint,
(3) The adhesive layer contains a colorant,
A decorative material for floors.   The floor decorative material according to claim 1, wherein the decorative sheet has a synthetic resin layer having a thickness of 100 µm or more in a lowermost layer.   The floor decorative material according to claim 1 or 2, wherein the groove portion and the chamfered portion coated with the colored paint have the same color tone as the adhesive layer containing the colorant.

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