JP2016188566A - Decorative material using cork material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative material that is excellent in comfort (for example, walking feeling and seating comfort) and scratch resistance, reduces an influence of irregularity on a base material of the decorative material, and has excellent workability at the time of cutting.SOLUTION: A decorative material has a cork material layer 2, a woody material layer 3 formed of a woody material different from a material forming the cork material layer, and a cosmetic layer 4 which are stacked in order on a substrate layer 1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a decorative material useful for floors, walls, joinery and the like, and particularly relates to a decorative material using a cork material useful as a decorative material for floors.

  Conventionally, as a wood-based decorative board used as a decorative material for a floor of a house, it has a natural wood design via an adhesive on the upper surface of a wooden base material (for example, hardwood lauan plywood) obtained from a good quality log. The thing which stuck the decorative sheet is known. As such a sheet pasting floor material, many products with improved scratch resistance, products with high design evaluation, and the like are sold, and are widely used as housing members.

  However, the conventional wood-based decorative materials may be too hard, and there is a problem that they are easily fatigued and are not comfortable to sit on. Therefore, in recent years, a cosmetic material has been developed in which a cork sheet is laminated between a wooden base material and a decorative sheet, and the cushioning property (softness) of the cork sheet has been developed. It is said that sitting comfort is improved.

  For example, Patent Document 1 discloses that “a wooden floor material in which a cork layer and a resin sheet layer are bonded and laminated in this order on the surface of a rectangular wooden substrate. (Claim 1)” It is disclosed that "the flooring after construction can have the cushioning (cushioning) property, the heat retaining property, or the gentleness to the living environment of the cork material" (paragraph [0020]).

  However, the wooden flooring of Patent Document 1 has improved walking feeling and sitting comfort, but has reduced scratch resistance or unevenness of the wooden base material (not flat or uneven or not horizontal) ), And there are new problems such as the effects of nodes appearing on the surface of wooden flooring.

  On the other hand, Patent Document 2 states that “a decorative sheet intermediate in which one or more layers are laminated on the front surface of the base sheet, and a synthetic resin backer layer on the back surface of the base sheet. A decorative sheet for flooring, wherein the synthetic resin layer-made backer layer is composed of two or more layers composed of a hard layer and a soft layer, and at least a layer in contact with the base material sheet is a hard layer. A decorative sheet for flooring "is disclosed.

  The decorative sheet for flooring of Patent Document 2 has a synthetic resin backer layer composed of two or more layers of a hard layer and a soft layer, so that moderate cushioning can be imparted while maintaining scratch resistance. However, if the decorative base material (attachment material) is relatively uneven or has no joints when it is made, the effect appears on the surface of the floor decorative material and the design is improved. There is a problem of lowering. In addition, since the flooring decorative material of Patent Document 2 has a lot of resin parts contained in the flooring decorative sheet, cutting performance is reduced when the flooring decorative material is cut (chamfered, grooved, etc.). There is a problem that special treatment such as corona treatment is required when coloring the surface.

JP 2004-324401 A JP 2010-106654 A

  As described above, conventional cosmetic materials that do not satisfy comfort (walking feeling, sitting comfort, etc.), scratch resistance, relief of unevenness of the decorative material base material, and workability during cutting are not obtained.

  Therefore, an object of the present invention is to provide a cosmetic material satisfying comfort (walking feeling, sitting comfort, etc.), scratch resistance, relief of unevenness of the decorative material base material, and workability during cutting.

  As a result of intensive studies to achieve the above object, the present inventor has developed a cork material layer and a specific decorative material that combines a wood material layer composed of a wood material made of a material different from the cork material layer. Thus, the inventors have found that the above object can be achieved and have completed the present invention.

That is, the present invention relates to a decorative material using the following cork material.
1. A cosmetic material comprising a base material layer, a cork material layer, a wood material layer composed of a wood material made of a material different from the cork material layer, and a decorative layer are sequentially laminated.
2. The said cork material layer is a cosmetics of said claim | item 1 whose density is 0.4 g / cm < ³ > or less and whose thickness is 1 mm or more and 4 mm or less.
3. Item 3. The decorative material according to Item 1 or 2, wherein the wood material layer has a density of 0.7 g / cm ³ or more and a thickness of 0.4 mm or more and 1.5 mm or less.
4). Item 4. The decorative material according to any one of Items 1 to 3, wherein the wood material layer is at least one selected from the group consisting of a medium density wood fiber board, a high density wood fiber board, and a particle board.
5. A decorative material having a size of 5 cm in length and 5 cm in width is used as a test piece, and the bottom surface of a metal cylindrical jig having a diameter of 10 mm is applied to the surface of the decorative layer of the test piece with a compression speed of 10 mm / min. The cosmetic material according to any one of Items 1 to 4, wherein the amount of displacement is 0.15 mm or more when the amount of displacement is measured by pressing under conditions and the load value is 100 N.
6). Item 6. The cosmetic material according to any one of Items 1 to 5, further comprising a cork material layer on the back surface of the base material layer.
7. Item 7. The decorative material according to any one of Items 1 to 6, which is a decorative material for floors.

  According to the decorative material of the present invention, on the base material layer, the cork material layer, the wooden material layer made of a wooden material different from the cork material layer, and the decorative layer are sequentially laminated. Makeup that satisfies comfort (walking feeling, sitting comfort, etc.), scratch resistance, relief of unevenness of cosmetic base material, and workability at the time of cutting, which could not be achieved with conventional wooden flooring and flooring cosmetics A material is obtained. As for workability, in addition to good cutting performance during chamfering and grooving, special processing such as corona treatment is not necessary when coloring the cutting surface.

It is a cross-sectional schematic diagram which shows the one aspect | mode of the decorative material of this invention. It is a cross-sectional schematic diagram which shows the one aspect | mode of the decorative material of this invention.

  The decorative material of the present invention is characterized in that a cork material layer, a wooden material layer made of a wooden material different from the cork material layer, and a decorative layer are sequentially laminated on the base material layer. To do.

  In the decorative material of the present invention having the above characteristics, a cork material layer, a wood material layer made of a wood material different from the cork material layer, and a makeup layer are sequentially laminated on the base material layer. This makes it possible to achieve comfort (walking feeling, sitting comfort, etc.), scratch resistance, relief of unevenness of cosmetic base material, and workability during cutting, which could not be achieved with conventional wooden flooring and flooring cosmetics. A satisfying cosmetic material is obtained.

Hereafter, each layer which comprises the decorative material of this invention is demonstrated, referring FIG. 1, FIG.
In the following, the direction in which the cork material layer 2 is located when viewed from the base material 1 is referred to as “up” or “front”, and the side opposite to the above direction as viewed from the base material 1 is referred to as “lower” or “back”. .
As for the numerical range, the numerical range indicated by “to” means “above” or “below”, except where “above” or “below” is specified. For example, 2 to 15 mm means 2 mm or more and 15 mm or less.

Base material layer 1 (decorative material base material 1)
Although not limited as the base material layer 1, for example, medium density wood fiber board (MDF), high density wood fiber board (HDF), particle board (PB), softwood plywood, hardwood plywood, early mature plywood, resin board (Polyvinyl chloride (PVC), polypropylene (PP), polyethylene (PE) etc.) etc. are mentioned.

  Here, examples of the conifers include pine, pine, pine, cedar, cypress, pine, sequoia, and spruce. Examples of the broad-leaved tree include lawan, china, hippopotamus, sen, beech, oak, and meranti. Examples of early mature trees include poplar, falkata, acacia, chameleon, eucalyptus, terminaria and the like.

  In the case of using woody plywood such as softwood plywood, hardwood plywood, and early-wood plywood, the number of laminated wood veneers (number of plies) is not limited, but usually 3 to 7 and more preferably 5 to 7 are preferred. Moreover, the adhesive agent used at the time of wood plywood preparation is not limited, either, The well-known adhesive for woodworking can be used widely. As an adhesive, for example, polyvinyl acetate, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ionomer, butadiene-acrylonitrile rubber, neoprene rubber, natural rubber and the like are effective ingredients. Adhesives to be used. Examples of the thermosetting adhesive include melamine-based, phenol-based, urea-based (such as vinyl acetate-urea) adhesives.

  Although the thickness of the base material 1 is not limited, about 2-15 mm is preferable and about 2-12 mm is more preferable.

Cork layer 2
The cork material layer 2 can give good comfort (walking feeling, sitting comfort, etc.) to the decorative material of the present invention, and if the substrate 1 has unevenness such as unevenness and nodes, the unevenness There are no particular limitations as long as the effect is not affected and the surface of the decorative material is not affected by the unevenness, and various commercially available products can be used.

  As the cork material layer 2 used in the present invention, not only a so-called natural cork which is a highly elastic material obtained by peeling and processing a cork tissue of a cork oak bark, but also a so-called synthetic cork made to resemble cork. Can be used.

The density of the cork material layer 2, in terms of alleviating the uneven effect of the substrate 1 with providing good comfort to the decorative material is preferably 0.4 g / cm ³ or less, more preferably 0.3 g / cm ³ or less . The lower limit of the density is not limited, but is about 0.15 g / cm ³ .

  The thickness of the cork material layer 2 is preferably 1 to 4 mm, and more preferably 2 to 3 mm from the viewpoint of giving good comfort to the decorative material and relaxing the unevenness of the base material 1.

  The cork material layer 2 may be a single layer or a laminate of a plurality of cork sheets having different elastic moduli and densities. Here, when using the laminated body of the several cork sheet from which a density differs, the density of the cork sheet which touches a decorative sheet among several cork sheets from the point which raises the tolerance with respect to the pressure wound of a cosmetics is another cork sheet. It is preferable to arrange so as to have a higher density.

  In addition, the decorative material of this invention may provide a cork material layer also in the back surface of a base material layer at the point which suppresses the curvature of a base material layer. That is, it is good also as a layer structure which pinches | interposes a base material layer with two cork material layers. Such a cork material layer (cork material layer 5) on the back surface will be described later.

Wood material layer 3 composed of wood material that is different from cork material layer 3
The wood material layer 3 (hereinafter referred to as “wood material layer 3”) composed of a wood material different from the cork material layer is particularly limited as long as it can impart excellent scratch resistance to the decorative material of the present invention. Instead, various commercially available products can be used.

  As the wood material layer 3, for example, at least one kind of medium density wood fiber board (MDF), high density wood fiber board (HDF), particle board (PB), or the like is preferably used.

The density of the wood material layer 3 is preferably 0.7 g / cm ³ or more, and more preferably 0.75 g / cm ³ or more in terms of imparting good scratch resistance to the decorative material. The upper limit of the density is not limited, but is about 1.2 g / cm ³ .

  The thickness of the wood material layer 3 is preferably 0.4 mm or more from the viewpoint of giving good scratch resistance to the decorative material, and 1.5 mm in order to maintain good comfort (walking ability, sitting comfort, etc.). The following is preferable, and 0.7 mm or less is more preferable.

Makeup layer 4
The decorative layer 4 is not particularly limited as long as it can impart design properties to the decorative material of the present invention, and includes a decorative sheet (including a base sheet including various materials such as a resin film, paper, and resin-impregnated paper). A wide selection can be made from a veneer and a decorative layer formed by transfer.

  For example, the decorative sheet preferably has a configuration in which at least a pattern layer, an adhesive layer, a transparent resin layer, and a transparent surface protective layer are provided on the base sheet, and the transparent surface protective layer is provided as the outermost surface layer. As an embodiment. Moreover, an uneven | corrugated pattern may be provided to the outermost surface layer of a decorative sheet by embossing.

  Hereinafter, each layer of the decorative sheet will be described as a representative example of the decorative layer 4.

≪Base material sheet≫
The substrate sheet has a pattern layer or the like sequentially laminated on its surface (front surface).

  Examples of the base sheet include various films such as a resin film, paper, and resin-impregnated paper. Among the resin films, those formed of a thermoplastic resin are preferable. Specifically, polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyethylene, polypropylene, polycarbonate, polyethylene naphthalate, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-acrylic acid ester copolymer Examples include polymers, ionomers, acrylic esters, and methacrylic esters. Among these, polyolefins such as polypropylene are preferable.

  The base material sheet may be colored. For example, a coloring agent (pigment or dye) can be added to the thermoplastic resin for coloring. As the colorant, for example, inorganic pigments such as titanium dioxide, carbon black and iron oxide, organic pigments such as phthalocyanine blue, and various dyes can be used. These can select 1 type, or 2 or more types. Moreover, what is necessary is just to set the addition amount of a coloring agent suitably according to a desired hue.

  The base sheet contains various additives such as fillers, matting agents, foaming agents, flame retardants, lubricants, antistatic agents, antioxidants, UV absorbers, and light stabilizers as necessary. It may be.

  Although the thickness of a base material sheet can be suitably set with the use of a final product, a usage method, etc., generally 50-250 micrometers is preferable.

  If necessary, the base sheet may be subjected to corona discharge treatment on the surface (front surface) in order to enhance the adhesion of the ink for forming the pattern layer. What is necessary is just to implement the method and conditions of a corona discharge process according to a well-known method. Further, if necessary, the back surface of the base material sheet may be subjected to corona discharge treatment, a pattern pattern layer (so-called back print) may be formed, a back surface primer layer, a backer layer described later, or the like may be formed. .

≪Pattern pattern layer (pattern layer) ≫
The pattern layer provides a desired pattern (design) to the decorative sheet, and the type of the pattern is not limited. Examples thereof include a wood grain pattern, a stone pattern, a grain pattern, a tiled pattern, a brickwork pattern, a cloth pattern, a leather pattern, a geometric figure, a character, a symbol, and an abstract pattern.

  The method for forming the pattern layer is not particularly limited. For example, printing using ink obtained by dissolving (or dispersing) a known colorant (dye or pigment) in a solvent (or dispersion medium) together with a binder resin. What is necessary is just to form in the base-material sheet | seat surface by a method.

  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 bronze powder, pearlescent pigments such as titanium oxide-coated mica and bismuth oxide chloride; fluorescent pigments; These colorants can be used alone or in admixture of two or more. These colorants may further contain fillers such as silica, extender pigments such as organic beads, neutralizing agents, surfactants and the like.

  As binder resin, polyester urethane resin, polyester urethane resin with hydrophilic treatment, polyester, polyacrylate, polyvinyl acetate, polybutadiene, polyvinyl chloride, chlorinated polypropylene, polyethylene, polystyrene, polystyrene-acrylate A polymer, a rosin derivative, an alcohol adduct of a styrene-maleic anhydride copolymer, a cellulose resin, or the like can be used in combination.

  More specifically, for example, polyurethane-polyacrylic resin, polyacrylamide resin, poly (meth) acrylic acid resin, polyethylene oxide resin, poly N-vinylpyrrolidone resin, water-soluble polyester resin, water-soluble Polyamide resins, water-soluble amino resins, water-soluble phenol resins, other water-soluble synthetic resins; water-soluble natural polymers such as polynucleotides, polypeptides, polysaccharides, etc. can be used. Further, for example, natural rubber, synthetic rubber, polyvinyl acetate resin, (meth) acrylic resin, polyvinyl chloride resin, polyurethane-polyacrylic resin modified or mixed resin, and other resins can also be used. The binder resin can be used alone or in combination of two or more.

  Examples of the printing method used for forming the pattern layer include a gravure printing method, an offset printing method, a screen printing method, a flexographic printing method, an electrostatic printing method, and an inkjet printing method. When forming a solid pattern pattern layer (also referred to as a colored concealment layer), for example, a gravure coating method, a gravure reverse coating method, a roll coating method, a knife coating method, an air knife coating method, a die coating Various coating methods such as a method, a lip coat method, a comma coat method, a kiss coat method, a flow coat method, and a dip coat method are also included.

  In addition to the above, for example, the hand-drawn method, the ink-sink method, the photographic method, the transfer method, the laser beam drawing method, the electron beam drawing method, the metal partial evaporation method, the etching method, etc. are used or combined with other forming methods. It may be used.

  The thickness of the pattern layer is not particularly limited and can be appropriately set according to product characteristics. The layer thickness at the time of coating is about 1 to 15 μm, and the layer thickness after drying is about 0.1 to 10 μm.

≪Adhesive layer≫
The adhesive layer exists between the pattern layer and the transparent resin layer. The adhesive used in the adhesive layer can be appropriately selected depending on the components constituting the pattern layer or the transparent resin layer. For example, various adhesives including polyurethane resin, polyacrylic resin, polycarbonate resin, epoxy resin and the like can be used. In addition to the reactive curing type, an adhesive such as a hot melt type, an ionizing radiation curing type, and an ultraviolet curing type may be used.

  The adhesive layer may be transparent or translucent as long as the pattern layer can be recognized.

  In the present invention, a known easy adhesion treatment such as a corona discharge treatment, a plasma treatment, a degreasing treatment, a surface roughening treatment or the like can be applied to the adhesion surface as necessary.

  The adhesive layer can be formed, for example, by applying the adhesive on the pattern layer, drying it once, and then laminating a transparent resin. The method for applying the adhesive is not particularly limited. For example, roll coating, curtain flow coating, wire bar coating, reverse coating, gravure coating, gravure reverse coating, air knife coating, kiss coating, blade coating, smooth coating, comma coating, etc. The method can be adopted.

  The thickness of the adhesive layer varies depending on the transparent protective layer, the type of adhesive used, and the like, but is generally about 0.1 to 30 μm.

≪Transparent resin layer≫
The transparent resin layer may be colored as long as it is transparent, and may be translucent as long as the pattern layer is visible.

  Examples of the resin include polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-acrylic acid ester copolymer, and ionomer. , Polymethylpentene, acrylic acid ester, methacrylic acid ester, polycarbonate, cellulose triacetate and the like. Among the above, polyolefin resins such as polypropylene are preferable. More preferably, it is a polyolefin resin having stereoregularity. When using a polyolefin resin, it is desirable to form a transparent resin layer by extruding a molten polyolefin resin.

  For the transparent resin layer, if necessary, a filler, matting agent, foaming agent, flame retardant, lubricant, antistatic agent, antioxidant, ultraviolet absorber, light stabilizer, radical scavenger, soft component Various additives such as rubber (for example, rubber) may be included.

  The thickness of the transparent resin layer is not particularly limited, but is generally about 10 to 400 μm.

≪Transparent surface protective layer≫
A transparent surface protective layer is formed on the transparent resin layer. The transparent surface protective layer is not limited, but preferably contains an ionizing radiation curable resin or a two-component curable urethane resin as a resin component. Substantially those formed from these resins are preferred. When forming a transparent surface protective layer with ionizing radiation curable resin or two-component curable urethane resin, it is easy to improve the abrasion resistance, impact resistance, contamination resistance, scratch resistance, weather resistance, etc. of the decorative sheet. . In the present invention, among these, the outermost layer is preferably an ionizing radiation curable resin layer.

  The ionizing radiation curable resin is not particularly limited, and prepolymers (including oligomers) and / or monomers containing radically polymerizable double bonds capable of undergoing a crosslinking reaction upon irradiation with ionizing radiation such as ultraviolet rays and electron beams. A transparent resin containing as a main component can be used. These prepolymers or monomers can be used alone or in combination. The curing reaction is usually a cross-linking curing reaction.

  Specifically, as the prepolymer or monomer, a compound having in the molecule a radically polymerizable unsaturated group such as a (meth) acryloyl group or (meth) acryloyloxy group, or a cationically polymerizable functional group such as an epoxy group. Is mentioned. Further, a polyene / thiol prepolymer based on a combination of polyene and polythiol is also preferable. Here, the (meth) acryloyl group means an acryloyl group or a methacryloyl group.

  Examples of the prepolymer having a radically polymerizable unsaturated group include polyester (meth) acrylate, urethane (meth) acrylate, epoxy (meth) acrylate, melamine (meth) acrylate, triazine (meth) acrylate, and silicone (meth) acrylate. Etc. These molecular weights are usually preferably about 250 to 100,000.

  As a monomer which has a radically polymerizable unsaturated group, methyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, phenoxyethyl (meth) acrylate etc. are mentioned as a monofunctional monomer, for example. Examples of the polyfunctional monomer include diethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolpropane ethylene oxide tri (meth) acrylate, dipentaerythritol tetra ( And (meth) acrylate, dipentaerythritol penta (meth) acrylate, and dipentaerythritol hexa (meth) acrylate.

  Examples of the prepolymer having a cationic polymerizable functional group include prepolymers of epoxy resins such as bisphenol type epoxy resins and novolac type epoxy compounds, and vinyl ether type resins such as fatty acid type vinyl ethers and aromatic vinyl ethers. Examples of the thiol include polythiols such as trimethylolpropane trithioglycolate and pentaerythritol tetrathioglycolate. Examples of the polyene include those in which allyl alcohol is added to both ends of polyurethane by diol and diisocyanate.

  As the ionizing radiation used for curing the ionizing radiation curable resin, electromagnetic waves or charged particles having energy capable of causing a curing reaction of molecules in the ionizing radiation curable resin (composition) are used. Usually, ultraviolet rays or electron beams may be used, but visible light, X-rays, ion rays, or the like may be used.

  As the ultraviolet light source, for example, 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, a metal halide lamp can be used. As a wavelength of ultraviolet rays, 190 to 380 nm is usually preferable.

  As the electron beam source, for example, 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, and a high frequency type can be used. Among them, those capable of irradiating electrons having energy of 100 to 1000 keV, preferably 100 to 300 keV are preferable.

  The two-component curable urethane resin is not particularly limited. Among them, a polyol component (acrylic polyol, polyester polyol, polyether polyol, epoxy polyol, etc.) having an OH group as a main component and an isocyanate component (tolylene diene) which is a curing agent component. Isocyanate, hexamethylene diisocyanate, metaxylene diisocyanate and the like) can be used.

  The transparent surface protective layer may contain a plasticizer, a stabilizer, a filler, a dispersant, a colorant such as a dye or a pigment, a solvent, or the like, if necessary.

  For example, the transparent surface protective layer is formed by applying an ionizing radiation curable resin or a two-component curable urethane resin on the transparent resin layer by a known coating method such as gravure coating or roll coating, and then curing the resin. Can be formed. In the case of an ionizing radiation curable resin, the resin is cured by electron beam irradiation.

  The thickness of the transparent surface protective layer is not particularly limited and can be appropriately set according to the properties of the final product, but is usually about 0.1 to 50 μm, preferably about 1 to 20 μm.

≪Embossing≫
The decorative sheet may be embossed from the transparent surface protective layer side.

  The embossing is performed to give a desired texture such as a wood grain pattern to the decorative sheet. For example, after heat-softening the transparent protective layer, it is pressed and shaped with an embossed plate having a concavo-convex pattern of a desired shape, and texture is imparted by cooling and fixing. 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.

  When embossing is performed, the embossed recess may be filled with ink by wiping as necessary. For example, the embossed recess is 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, the product value can be increased by expressing a design closer to the actual grain.

  In the present invention, the transparent surface protective layer may contain other components. For example, additives such as a solvent, an ultraviolet absorber, an antioxidant, a dispersant, a light stabilizer, a gloss adjuster, an antiblocking agent, and a lubricant can be blended.

≪Backer layer≫
The decorative sheet can be provided with a so-called backer layer (synthetic resin layer) on the back side of the base sheet. The backer layer is a relatively thick synthetic resin layer that can be arbitrarily provided as a part of the decorative sheet and imparts cushioning properties to the decorative sheet.

  Examples of the resin component of the synthetic resin layer include polyethylene (high density polyethylene, medium density polyethylene, low density polyethylene), polypropylene, and the like as the polyolefin resin. These can be used alone or in combination of two or more. Polypropylene includes homopolypropylene, random polypropylene, block polypropylene and the like.

  Examples of resin components other than polyolefin resins include vinyl chloride resin, polystyrene, polyamide resin, polyimide resin, polyamideimide resin, fluororesin, urethane resin, polysulfone, polycarbonate, polyacetal, polyphenylene ether, methacrylic resin, acrylonitrile styrene resin, Acrylonitrile butadiene styrene resin, polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyarylate, amorphous polyethylene terephthalate (so-called A-PET) [Mitsubishi Chemical Corporation: Novaclear (trade name) )], Polyethylene terephthalate copolymer (PETG) and the like.

  90-100 weight% is preferable and, as for content of the resin component in a synthetic resin layer, 95-100 weight% is more preferable.

  The synthetic resin layer preferably contains a crystallization nucleating agent. By including the crystallization nucleating agent, the tensile elastic modulus of the synthetic resin layer can be improved. Examples of the crystallization nucleating agent include bis (p-methylbenzylidene) sorbitol, sodium 2,2′-methylenebis (4,6-di-t-butylphenyl) phosphate, metal salt of rosin, and metal salt of rosin derivative. A metal salt of benzoic acid or the like can be used. Examples of the metal salt of rosin, metal salt of rosin derivative and metal salt of benzoic acid include sodium salt, copper salt, zinc salt and the like. These crystallization nucleating agents can be used singly or in combination.

  About content of a crystallization nucleating agent, 0.05-0.4 weight part is preferable with respect to 100 weight part of resin components of a synthetic resin layer, and 0.1-0.3 weight part is more preferable.

  The synthetic resin layer may be formed by laminating a resin composition containing the resin component and the like on a base sheet by, for example, a calendar method, an inflation method, a T-die extrusion method, or the like. Moreover, you may use a preformed film as the said synthetic resin layer.

  The thickness of the synthetic resin layer is not particularly limited, and is usually about 50 to 210 μm, preferably about 100 to 200 μm.

Cork layer 5
The cork material layer 5 is an arbitrary layer that can be provided in consideration of the point of suppressing the warp of the base material layer 1, the point of mitigating the influence of unevenness of the foundation surface that is the construction target of the decorative material, Similar to the cork material layer 2, various commercially available products can be used.

  As the cork material layer 5 used in the present invention, not only the so-called natural cork, which is a highly elastic material obtained by peeling and processing the cork structure of the bark of cork oak, similar to the material used in the cork material layer 2, Any so-called synthetic cork made to resemble can be used.

  As thickness of the cork material layer 5, in order to achieve the said objective, 0.5-6 mm is preferable and 1-3 mm is more preferable.

Production method and physical properties of the decorative material of the present invention The decorative material of the present invention comprises a base material 1, a cork material layer 2, a wood material layer 3 and a decorative layer 4, and in some cases, a cork material layer 5 and adhesives in that order. It can produce by laminating | stacking. The base material 1, the cork material layer 2, the wood material layer 3, the decorative layer 4, and in some cases the cork material layer 5 is the minimum (or close to the minimum) layer configuration that constitutes the decorative material of the present invention, and is necessary. Accordingly, it is permissible to interpose another layer within a range that does not inhibit the effect of the present invention. The thickness of the decorative material is not limited, but is preferably about 6 to 15 mm, and more preferably about 7 to 13 mm.

  Adhesives are not limited. For example, polyvinyl acetate, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ionomer, butadiene-acrylonitrile rubber, neoprene rubber, natural Rubber etc. are mentioned. These adhesives are used alone or in combination of two or more.

  The decorative material of the present invention is a metal cylindrical jig having a diameter of 10 mm using a decorative tester having a size of 5 cm in length and 5 cm in width as a test piece, and using a compression tester on the surface of the decorative layer 4 of the test piece. When the bottom surface is pushed in at a compression speed of 10 mm / min and the displacement amount when the load value is 100 N is measured, the displacement amount is preferably 0.15 mm or more, more preferably 0.3 mm or more. preferable. The upper limit of the amount of displacement is not limited, but is about 2 mm. The compression tester used in the present invention is a Tensilon universal tester (model number: RTC-1250A, manufactured by A & D Corporation).

  Such a decorative board of the present invention is useful for floors, walls, joinery and the like, and can be used, for example, for interior materials of buildings such as floors; exterior materials such as balconies and verandas. In particular, the decorative board of the present invention can be suitably used as a decorative material for a floor regardless of the interior material or the exterior material.

  The present invention will be specifically described below with reference to examples and comparative examples. However, the present invention is not limited to the examples.

Example 1
A pattern layer was formed by gravure printing on a colored polypropylene film having a thickness of 60 μm as a base sheet.

  Next, a transparent polypropylene resin film having a thickness of 80 μm, which is a transparent resin layer, was bonded onto the pattern layer using a urethane dry laminate adhesive.

  Next, an electron beam curable transparent surface protective layer having a thickness of 15 μm was formed on the transparent resin layer to produce a sheet having a thickness of 0.16 mm to obtain a decorative sheet.

On the other hand, a cork material layer (density: 0.3 g / cm ³ ) having a thickness of 2 mm was bonded to a base material layer of 9 mm thick softwood plywood with a vinyl acetate adhesive.

Next, a high-density fiberboard (density: 0.9 g / cm ³ ) having a thickness of 0.5 mm was adhered to the cork material layer as a wood material layer having a different material from the cork material layer with a vinyl acetate adhesive. . As the vinyl acetate adhesive, a vinyl acetate emulsion adhesive (Chuo Rika Kogyo Co., Ltd., 7 g / scale angle) was used. The adhesive has a mass ratio of BA-10L (main agent): BA-11B (curing agent) = 100: 2.5.

  Next, a decorative sheet was bonded onto the wooden material layer with a urethane adhesive to obtain a decorative material.

Example 2
A high density fiber board (density: 0.8 g / cm ³ ) having a thickness of 2.7 mm was used instead of a high density fiber board (density: 0.9 g / cm ³ ) having a thickness of 0.5 mm. A cosmetic material was obtained in the same manner as in Example 1.

Comparative Example 1
A cosmetic material was obtained in the same manner as in Example 1 except that a high-density fiberboard (density: 0.9 g / cm ³ ) having a thickness of 0.5 mm was not used and a decorative sheet was adhered on the cork material layer. .

Comparative Example 2
A pattern layer was formed by gravure printing on a colored polypropylene film having a thickness of 60 μm as a base sheet.

  Next, a transparent polypropylene resin film having a thickness of 80 μm, which is a transparent resin layer, was bonded onto the pattern layer using a urethane dry laminate adhesive.

  Next, an electron beam curable transparent surface protective layer having a thickness of 15 μm was formed on the transparent resin layer to produce a sheet having a thickness of 0.16 mm.

  Next, a polyester transparent resin layer having a thickness of 0.25 mm as a backer layer was bonded to the back surface of the base sheet with a urethane adhesive to obtain a decorative sheet.

  Next, a decorative sheet was adhered to the base material layer 11.7 mm thick softwood plywood with a urethane adhesive to obtain a decorative material.

Test example 1
The pencil hardness test and the compression load test were performed on the decorative materials obtained in the examples and comparative examples.
≪Pencil hardness test≫
The scratch resistance performance of each decorative material was evaluated using a pencil hardness tester. The test was conducted in accordance with JIS K5600-5-4 except that the test machine was set so as to give a load of 500 g to the tip of the pencil when the test machine was in the horizontal position. Specifically, tests are performed using pencils having cores of 6B, 5B, 4B, 3B, 2B, B, HB, F, H, 2H, 3H, 4H, 5H, and 6H in order from the softest core hardness. went.

  The evaluation standard of the scratch resistance performance was to examine the limit hardness at which scratches or dents were not noticeable. If the limit hardness was 3B or higher, the scratch resistance performance was judged to be good (A). Moreover, if the hardness was 4 B or less, the scratch resistance was judged to be insufficient (B). When investigating scratches or dents, each cosmetic material was set up vertically and examined by visual observation from a distance of 50 cm perpendicular to the surface of each cosmetic material.

In the column of the pencil hardness test in Table 1, the limit hardness of each decorative material is shown.
≪Compression load test≫
A test piece is a decorative material having a size of 5 cm in length and 5 cm in width, and the bottom surface of a metal cylindrical jig having a diameter of 10 mm is applied to the surface of the decorative sheet of the test piece with a compression speed of 10 mm / min. The displacement amount when the displacement amount when the load value is 100 N was measured was investigated. The compression tester is a Tensilon universal tester (model number: RTC-1250A, manufactured by A & D Corporation).

  The evaluation criteria were as follows (A or B passed, C rejected).

A: Displacement amount is 0.3 mm or more B: Displacement amount is 0.15 mm or more and less than 0.3 mm C: Displacement amount is less than 0.15 mm

  As is apparent from the results in Table 1, the present invention is such that a cork material layer, a wood material layer made of a wood material different from the cork material layer, and a decorative layer are sequentially laminated on the base material layer. The cosmetic materials (Examples 1 and 2) have an evaluation of A for the pencil hardness test of A and are excellent in scratch resistance. In addition, the decorative material of the present invention has an A or B evaluation (displacement amount is 0.15 mm or more) in a compression load test, and comfort (walking feeling, sitting comfort, etc.) is improved as compared with conventional products. .

1. Base material (decorative base material)
2. 2. Cork material layer 3. Wood material layer made of wood material that is different from cork material layer Cosmetic layer5. Cork layer

Claims (7)

  A cosmetic material comprising a base material layer, a cork material layer, a wood material layer composed of a wood material made of a material different from the cork material layer, and a decorative layer are sequentially laminated. The said cork material layer is a cosmetics of Claim 1 whose density is 0.4 g / cm < ³ > or less and whose thickness is 1 mm or more and 4 mm or less. The decorative material according to claim 1 or 2, wherein the wood material layer has a density of 0.7 g / cm ³ or more and a thickness of 0.4 mm or more and 1.5 mm or less.   The said wood material layer is a cosmetic material in any one of Claims 1-3 which is at least 1 sort (s) selected from the group which consists of a medium density wood fiber board, a high density wood fiber board, and a particle board.   A decorative material having a size of 5 cm in length and 5 cm in width is used as a test piece, and the bottom surface of a metal cylindrical jig having a diameter of 10 mm is applied to the surface of the decorative layer of the test piece with a compression speed of 10 mm / min. The decorative material according to any one of claims 1 to 4, wherein the amount of displacement is 0.15 mm or more when the amount of displacement is measured by pressing under conditions and a load value of 100 N.   The cosmetic material according to any one of claims 1 to 5, further comprising a cork material layer on a back surface of the base material layer.   The decorative material according to any one of claims 1 to 6, which is a floor decorative material.

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