KR20160116052A - Floor decoration material - Google Patents

Abstract

The present invention provides a bottom cosmetic material which is sufficiently suppressed from occurrence of expansion or warpage due to moisture absorption even when a decorative sheet is laminated on the front surface of a wood-base plate. The moisture-proof film has a temperature of 40 占 폚, a humidity of 90% or more, and a moisture-proofing film, wherein the moisture- Is 3 g / m < 2 >. 24 hours or less.

Description

{FLOOR DECORATION MATERIAL}

The present invention relates to floor coverings suitable for direct application on concrete slabs.

BACKGROUND ART [0002] Conventionally, a bottom cosmetic material using a woody plate is known. Particularly, in the case of a bottom cosmetic material directly attached to a concrete slab in an apartment or the like, notched grooves may be formed on the back surface of the wooden slab in consideration of sound insulation and followability to a concrete slab. In addition, a cushioning material may be provided on the back surface of the bottom cosmetic material in order to increase the walking feeling or the like.

In the case of directly adhering a flooring cosmetic material on a concrete slab, if the curing reaction of the concrete slab is not completely completed, moisture is absorbed from the back side of the flooring cosmetic material after the application, thereby causing expansion or warping of the woody plate . This problem is remarkable because the absorbed moisture is hardly released from the front surface of the bottom cosmetic material when a decorative sheet (in particular, a toilet sheet having a resin layer and having little moisture permeability) is provided on the front surface of the wooden board.

In order to suppress the expansion and warpage of such a bottom cosmetic material, an attempt was made to provide a moisture-proof sheet on the back surface of the cushioning material to suppress the absorption of water into the woody plate. For example, Patent Document 1 discloses a floor material comprising a cushioning material layer adhered to the back side of a flooring base material, and a moisture-proofing sheet having a paper layer formed on the back and back of the cushioning material layer as a core layer on the backside of the cushioning material layer .

However, the flooring material disclosed in Patent Document 1 still has insufficient moisture-proof property, and in particular, when a decorative sheet is laminated on the front surface of the flooring material, it is impossible to sufficiently prevent damage (expansion and warping) caused by moisture absorption of the woody plate. Therefore, even when a decorative sheet is laminated on the front surface of a wood-based plate, development of a floor-use cosmetic material which is sufficiently suppressed from occurrence of expansion or warping due to moisture absorption is desired.

Japanese Unexamined Patent Application Publication No. 10-299234

The object of the present invention is to solve the above problems of the prior art and to provide a flooring cosmetic material which is sufficiently suppressed from occurrence of expansion and warpage due to moisture absorption even when a decorative sheet is laminated on the front surface of a woody plate . It is another object of the present invention to provide a bottom cosmetic material having excellent adhesion with an adherend.

As a result of intensive studies, the inventors of the present invention have found that the above object can be achieved when a specific moisture-proof film is used, and thus the present invention has been accomplished.

That is, the present invention relates to the following cosmetic material for floor.

1. A flooring cosmetic material comprising a woody plate laminated with a face sheet on the front face thereof and a moisture-proofing film laminated on the back face of the woody plate with a cushioning material interposed therebetween,

Wherein the humidity-proof film has a moisture permeability of 7 g / m 2 24 hours or less at a temperature of 40 캜 and a humidity of 90%.

2. The bottom cosmetic material according to 1, wherein the wood plate has a notched groove formed on the back surface thereof.

3. The bottom cosmetic material as in 1 above, wherein said moisture-impermeable film has at least a base material layer made of synthetic resin and a vapor deposition layer.

4. The bottom cosmetic material as in 3 above, wherein the moisture-proof film has a primer layer 1 between the synthetic resin base layer and the vapor deposition layer.

5. The bottom cosmetic material as set forth in 3 above, wherein said moisture-impermeable film comprises a surface coat layer / said vapor deposition layer / primer layer 1 / said synthetic resin base layer.

6. The bottom cosmetic material according to 1 above, wherein the moisture-proof film comprises a surface coat layer / synthetic resin base layer.

7. The bottom cosmetic material according to 1, further comprising a primer layer 2 on the front surface of the moisture-proof film.

8. The bottom cosmetic material as in 1 above, further comprising a primer layer 3 on the back side of the moistureproof film.

9. The bottom cosmetic according to 1, wherein the cushioning material is a nonwoven fabric.

Hereinafter, the bottom cosmetic material of the present invention will be described in detail.

The bottom cosmetic material of the present invention is a bottom cosmetic material having a face sheet laminated on a front face of a wood plate and a moisture-proofing film laminated on the back face of the wood plate through a cushioning material. , And the moisture permeability at 90% humidity is 7 g / m 2 24 hours or less. The moisture permeability is a value measured under the environment of a temperature of 40 DEG C and a humidity of 90% RH in accordance with JIS Z0208 (according to the moisture permeability test method (cup method).) Hereinafter, the moisture permeability in the present specification represents a measured value under the conditions.

In the present specification, the front side refers to the side of the toilet seat of the bottom cosmetic, and the upper side in Fig. 1 is the front side. The back side refers to the moisture-impermeable film side (or the side opposite to the face side of the toilet seat) of the bottom cosmetic material, and the lower side in FIG. 1 is the back side.

The bottom cosmetic material of the present invention having the above characteristics has a moisture-proof film having a moisture permeability of 7 g / m < 2 > 24 hours or less. Thus, even when the bottom cosmetic material is directly adhered onto the concrete slab, (Absorption) is suppressed. Therefore, even when the decorative sheet is laminated on the front surface of the floor-use cosmetic material, the occurrence of swelling and warpage caused by the moisture absorption of the woody sheet is sufficiently suppressed. Such a bottom cosmetic material of the present invention is suitable for use in a construction where it is directly adhered on a concrete slab in an apartment or the like.

Hereinafter, each constitution of the bottom cosmetic material of the present invention will be described.

(Wooden board)

Examples of woody boards include wooden boards such as wood veneer, plywood, particle board, and medium density fiber board (MDF) made of trees such as cedar, cypress, nawang, and teak.

In the present invention, it is preferable that a wood plate having a notched groove formed on its back surface. This notched groove enhances the soundproofing property of the flooring cosmetic material and improves the followability to the construction surface when the flooring cosmetic material is applied. The depth and size of the notch grooves can be appropriately set according to the type of the woody plate or the construction surface.

The thickness of the woody plate is not particularly limited, but is preferably about 3 to 15 mm, more preferably about 6 to 12 mm.

(Toilet seat)

A decorative sheet is laminated on the front surface of the wooden board. The decorative sheet is not limited to a specific one, but it preferably has, for example, a picture pattern layer (solid ink layer / patterned ink layer), a transparent resin layer and a surface protection layer in this order on the base sheet. Hereinafter, the makeup sheet will be described as an example.

Examples of the base sheet include: 1) paper such as a sheet, a paper sheet, a kraft paper, a Japanese paper, a titanium paper, a resin impregnated paper, and a backing paper reinforced paper, 2) a wood fiber, a glass fiber, an asbestos, a polyester fiber, And 3) synthetic resin sheets such as polyolefin, polyester, polyacrylic, polyamide, polyurethane, polystyrene and the like, or a laminate of two or more kinds thereof.

The thickness of the substrate sheet is preferably about 20 to 300 mu m. The substrate sheet may be colored as required. Further, the surface may be subjected to a surface treatment such as a corona discharge treatment, a plasma treatment, or an ozone treatment. In this specification, the surface refers to the outer surface of an article (or layer), and is used in a manner different from the above-described front surface.

The pattern layer is composed of a patterned ink layer and / or a solid ink layer. The image pattern layer can be formed by a printing method such as gravure printing, offset printing, or silk screen printing. The shape of the patterned ink layer may be, for example, a shape of wood, a shape of a wall, a texture of a cloth, a shape of a leather pattern, a shape of a geometric figure, a character, a symbol, The solid ink layer is obtained by solid printing of the colored ink. The pattern layer is composed of one or both of a patterned ink layer and a solid ink layer.

Examples of the ink used for the pattern layer include polyolefins such as chlorinated polyolefins such as chlorinated polyethylene and chlorinated polypropylene, polyesters, polyurethanes composed of isocyanate and polyol, polyacryl, polyvinyl acetate, polyvinyl chloride, vinyl chloride-vinyl acetate Or a mixture of two or more of them may be used, and a pigment, a solvent, various auxiliaries and the like may be added to the mixture to form an ink. Among them, one kind or a mixture of two or more kinds of polyurethane, polyacrylic, and polyamide-based resin composed of polyester, isocyanate and polyol is preferable from the viewpoints of environmental problems and adhesion to the printed surface.

The transparency resin layer is not particularly limited as long as it is a transparent resin layer and can be suitably formed, for example, by a transparent thermoplastic resin.

Specific examples thereof include flexible, semi-rigid or rigid polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene- Acrylonitrile copolymer, an ionomer, an acrylate ester, and a methacrylate ester. Of the above, polyolefin resins such as polypropylene are preferable.

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

The transparency resin layer may contain various additives such as a filler, a polish remover, a foaming agent, a flame retardant, a lubricant, an antistatic agent, an antioxidant, an ultraviolet absorber, a light stabilizer, a radical scavenger, and a soft component (for example, rubber).

The surface protective layer (transparent surface protective layer) is formed to impart surface physical properties such as scratch resistance, abrasion resistance, water resistance and stain resistance required for a decorative sheet. The resin for forming the surface protective layer is preferably a curable resin such as a thermosetting resin or an ionizing radiation curing resin. Particularly, the ionizing radiation curable resin is preferable from the viewpoints of high surface hardness and productivity.

As the thermosetting resin, for example, unsaturated polyester resin, polyurethane resin (including two-part curing type polyurethane), epoxy resin, aminoalkyd resin, phenol resin, urea resin, diallyl phthalate resin, melamine resin, Resin, a melamine-urea co-condensation resin, a silicon resin, and a polysiloxane resin.

A crosslinking agent, a curing agent such as a polymerization initiator, and a polymerization accelerator may be added to the resin. For example, as the curing agent, isocyanate, an organic sulfonic acid salt, and the like can be added to an unsaturated polyester resin, a polyurethane resin or the like, and an organic amine or the like can be added to the epoxy resin, and a peroxide such as methyl ethyl ketone peroxide, A radical initiator such as isobutylnitrile may be added to the unsaturated polyester resin.

Examples of the method of forming the surface protective layer with the thermosetting resin include a method of applying a solution of a thermosetting resin by a coating method such as a roll coating method or a gravure coating method, followed by drying and curing. The application amount of the solution is about 5 to 30 占 퐉, preferably about 5 to 20 占 퐉 in solid content.

The ionizing radiation curing type resin is not limited as long as it is a resin which generates a crosslinking polymerization reaction by irradiation with ionizing radiation and changes into a three-dimensional polymer structure. For example, at least one of a prepolymer, an oligomer and a monomer having a polymerizable unsaturated bond or an epoxy group capable of crosslinking by irradiation with ionizing radiation can be used. For example, acrylate resins such as urethane acrylate, polyester acrylate and epoxy acrylate; Silicon resins such as siloxane; Polyester resin; Epoxy resins and the like.

Examples of ionizing radiation include visible rays, ultraviolet rays (near ultraviolet rays, vacuum ultraviolet rays, etc.), X rays, electron rays, and ion rays, among which ultraviolet rays and electron rays 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, a metal halide lamp and the like can be used. The wavelength of the ultraviolet ray is about 190 to 380 nm.

As the electron beam source, various electron beam accelerators such as a Cockroft Walton type, a Bandegraft type, a resonant transformer type, an insulating core transformer type, a linear type, a dinamitron type and a high frequency type can be used. The energy of the electron beam is preferably about 100 to 1000 keV, and more preferably about 100 to 300 keV. The irradiation dose of the electron beam is preferably about 2 to 15 Mrad.

The ionizing radiation curable resin is sufficiently cured by irradiation with electron beams, but in the case of curing by irradiation with ultraviolet rays, it is preferable to add a photopolymerization initiator (sensitizer).

Examples of the photopolymerization initiator in the case of a resin system having a radical polymerizable unsaturated group include a photopolymerization initiator such as acetophenone, benzophenone, thioxanthone, benzoin, benzoin methyl ether, At least one of sulfide, dibenzyl disulfide, diethyloxide, triphenylbiimidazole, isopropyl-N, N-dimethylaminobenzoate and the like can be used. In the case of a resin system having a cationic polymerizable functional group, at least one of aromatic diazonium salts, aromatic sulfonium salts, metallocene compounds, benzoin sulfonic acid esters, and phosphorylcyclopentonium diaryl iodosalts, for example, Can be used.

The amount of the photopolymerization initiator to be added is not particularly limited, but is generally about 0.1 to 10 parts by weight based on 100 parts by weight of the ionizing radiation curable resin.

As a method of forming the protective layer with the ionizing radiation curable resin, for example, a solution of the 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 about 5 to 30 占 퐉, preferably about 5 to 20 占 퐉 in solid content.

An inorganic filler may be added when the abrasion resistance and abrasion resistance are further imparted to the surface protective layer formed of the ionizing radiation curable resin. Examples of the inorganic filler include inorganic fillers such as aluminum oxide, silicon carbide, silicon dioxide, calcium titanate, barium titanate, magnesium pyroborate, zinc oxide, silicon nitride, zirconium oxide, chromium oxide, boron nitride, Diamond, diamond-like steel, glass fiber and the like.

The amount of the inorganic filler to be added is about 1 to 80 parts by weight based on 100 parts by weight of the ionizing radiation curable resin.

The lamination of the respective layers can be carried out, for example, by forming a picture pattern layer (solid ink layer, patterned ink layer) on one side of the substrate sheet by printing in sequence, and then applying a known dry The transparent resin layer may be laminated via a lamination adhesive by a dry lamination method, a T-die extrusion method, or the like, and a surface protective layer may be formed.

The embossing shape may be formed by embossing the surface protective layer side. The irregular shape can be formed by a heating press, hair line processing, or the like. Examples of the irregularities include a channel groove, an irregular surface of a slab, a cloth surface texture, a crepe, a sand texture, a hair line, and a stripe groove.

The decorative sheet may have a synthetic resin layer (so-called backer layer) having a thickness of 100 mu m or more in the lowermost layer (layer adhering to the woody plate). In addition, the backer layer means a buffer layer for the purpose of shock absorption or the like in a bottom cosmetic material. Examples of the material constituting the backer layer include polypropylene, an ethylene-vinyl alcohol copolymer, polymethylene, polymethylpentene, polyethylene terephthalate, a polyalkylene terephthalate having high heat resistance [for example, a part of ethylene glycol (Trade name: PET-G (manufactured by Eastman Chemical Company), which is a polyethylene terephthalate substituted with 1,4-cyclohexane dimethanol or diethylene glycol), polybutylene terephthalate, polyethylene naphthalate, polyethylene naphthalate- A copolymer, a polycarbonate, a polyarylate, a polyimide, a polystyrene, a polyamide, an ABS and the like. These resins may be used alone or in combination of two or more. The upper limit of the thickness of the backer layer is not limited, but 600 mu m is suitable.

When the decorative sheet is laminated on a woody plate, a known adhesive may be used. As the adhesive, for example, an adhesive containing an effective component such as polyvinyl acetate, polyvinyl chloride, vinyl chloride / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ionomer, butadiene / acrylonitrile rubber, neoprene rubber, . The thickness of the adhesive layer is not limited, but is preferably about 0.1 to 50 mu m.

(Cushioning material)

A cushioning material is installed on the back of the wooden board.

The cushioning material is not particularly limited as long as it is a material capable of imparting a shock-absorbing property to the bottom cosmetic material to improve walking feeling and the like. For example, those obtained by laminating one kind or two kinds of foamed polyurethane, foamed polyester, foamed polypropylene and compressed polyurethane.

More specifically, it is possible to cite (1) a laminate of foamed polyurethane and foamed polyester, (2) a laminate of foamed polyurethane and foamed polypropylene, and (3) a laminate of foamed polyurethane and compressed polyurethane. These types are selected depending on the degree of cushioning desired.

In addition, various nonwoven fabrics or so-called spunbond (for example, a mixture of polystyrene and polyethylene) or a laminate thereof may be used. The thickness of the cushioning material is not limited, but is preferably about 2 to 7 mm.

When the cushioning material is laminated on a woody plate, a known adhesive may be used. As the adhesive, for example, an adhesive containing an effective component such as polyvinyl acetate, polyvinyl chloride, vinyl chloride / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ionomer, butadiene / acrylonitrile rubber, neoprene rubber, . The thickness of the adhesive layer is not limited, but is preferably about 0.1 to 50 mu m.

(Moisture-proof film)

The moisture-proof film is provided on the back side of the wooden plate through the cushioning material. In the present invention, the moisture-proof film has a moisture permeability of 7 g / m < 2 > 24 hours or less at a temperature of 40 DEG C and a humidity of 90%. Among them, it is preferably 5 g / m 2 24 hours or less.

The moisture-proof film is not limited as long as it satisfies the moisture permeability. For example, it is made of a synthetic resin such as an olefinic thermoplastic resin such as polyethylene and polypropylene, an ester-based thermoplastic resin such as polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate A film containing a base layer can be used. Above all, it is particularly preferable to have at least a base material layer and a vapor deposition layer made of a synthetic resin. Hereinafter, this embodiment will be described by way of example.

Examples of the synthetic resin substrate layer include olefinic thermoplastic resins such as polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl alcohol copolymer, and mixtures thereof; Ester type thermoplastic resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyethylene naphthalate-isophthalate copolymer, polycarbonate and polyarylate; Acrylic thermoplastic resins such as methyl polymethacrylate, ethyl polymethacrylate and butyl polyacrylate; Halogenated thermoplastic resins such as polyimide, polyurethane, polystyrene, and acrylonitrile-butadiene-styrene resin.

The synthetic resin base layer may be a sheet drawn in the uniaxial or biaxial direction or may be unstretched. However, since it is a base material on which a vapor deposition layer to be described later is formed, Is preferred. The thickness of the synthetic resin base layer is suitably about 9 to 60 mu m.

Examples of the vapor deposition layer include an inorganic oxide vapor deposition layer including an inorganic vapor deposition layer including a metal thin film typified by aluminum, and an inorganic oxide thin film typified by silicon oxide, magnesium oxide, and aluminum oxide. The deposition layer is formed on a synthetic resin substrate layer by a known deposition method such as a vacuum deposition method, a plasma activation chemical reaction deposition method, or the like. More preferably, the deposition layer is a transparent inorganic oxide deposition layer.

For the purpose of further improving the gas barrier properties of the vapor deposition layer or the synthetic resin base layer, a surface coat layer may be formed on the vapor deposition layer or on the synthetic resin base layer. Examples of the surface coat layer include a polyvinyl alcohol resin (PVA), a urethane resin, and a polyvinylidene chloride resin. The polyvinyl alcohol resin is a resin having the formula R ¹ _n M (OR ² ) _m (wherein R ¹ and R ² are the same or different and each represents an alkyl group having 1 to 8 carbon atoms, a phenyl group, an alkyl substituent having 1 to 2 carbon atoms, , M represents a metal atom, n represents an integer of 0 or more, m represents an integer of 1 or more, and n + m represents a valence of M) A composition prepared by the polycondensation of a polyalkylene oxide-based resin, a polyvinyl alcohol-based resin and / or an ethylene-vinyl alcohol copolymer, and a sol-gel process catalyst, an acid, water and an organic solvent by a sol- . Further, by combining polyvinyl alcohol and ethylene / vinyl alcohol copolymer, gas barrier property, water resistance, weather resistance and the like are remarkably improved. A silane coupling agent or the like may be added to the composition. A surface coat layer is obtained by applying these resins or compositions on a synthetic resin base layer or a vapor deposition layer by a known coating method such as a roll coating method or a gravure coating method. When the surface coat layer is a urethane-based resin, a two-part curing type resin is preferable.

The surface coat layer may serve also as a primer layer 2 or a primer layer 3, if the surface coat layer is a polyvinyl alcohol-based resin or a urethane-based resin surface.

The surface coat layer also functions as a protective layer of a vapor deposition layer or a synthetic resin base layer. The thickness of the surface coat layer is suitably about 0.1 to 10 mu m.

The synthetic resin base layer and / or the surface coat layer may be subjected to surface treatment such as corona treatment if necessary. By such a surface treatment, the bonding strength with the adjacent layer can be increased.

When the moisture-proof film has a synthetic resin base layer and a surface coat layer, the front surface of the moisture-proof film is not particularly limited. That is, the front surface of the moisture-proof film may be a synthetic resin base layer or a surface coat layer.

When the front surface of the moistureproof film is used as the surface coat layer, it is possible to prevent scratches from occurring in conveying the bottom cosmetic material.

When the front surface of the moisture-proof film is made of a synthetic resin base layer, the surface coat layer may be disposed on the back surface. The surface coat layer disposed on the back surface not only functions as a protective layer and improves the gas barrier property to the vapor deposition layer or the synthetic resin base material layer but also functions as a primer layer 3 described later. In this case, the adherence of the adherend such as the bottom cosmetic material and the concrete slab of the present invention (when the adhesive is applied on the adherend, adhesion with the adherend and the adhesive) is improved. Particularly, in the case of a bottom cosmetic material comprising the above-described laminated structure, when the surface coat layer is a polyvinyl alcohol-based resin, it has excellent gas barrier properties and protection performance against the vapor deposition layer or the synthetic resin base layer However, since the adhesion with the adherend is excellent, the durability of the bottom cosmetic material is greatly improved.

In the present invention, a primer layer may be formed between the synthetic resin base layer and the deposition layer. In addition, a primer layer may be formed on one side or both sides of various moisture-proof films. In this specification, a primer layer formed between a synthetic resin substrate layer and a vapor deposition layer is referred to as a primer layer 1, a primer layer formed on a front surface of a moisture-proofing film is referred to as a primer layer 2, Layer is referred to as a primer layer 3.

The primer layer 1 improves the adhesion between the synthetic resin base layer and the deposition layer, the primer layer 2 improves the adhesion between the cushioning material and the moisture-proofing film, and the primer layer 3 improves adhesion between the moisture-tight film and the adherend .

Examples of the resin contained in the primer layer (primer layer (1, 2, 3)) include polyvinyl alcohol resin, ester resin, urethane resin, acrylic resin, polycarbonate resin, vinyl chloride- , Polyvinyl butyral resins, and nitrocellulose resins. These resins can be used alone or in combination. The same polyvinyl alcohol resin as used for the surface coat layer can be used. Formation of the primer layer can be carried out by using a suitable coating means such as a roll coating method or a gravure printing method.

If the primer layer 2 or the primer layer 3 is a polyvinyl alcohol-based resin or a urethane-based resin, the primer layer 2 or the primer layer 3 can also serve as a surface coat layer in the moisture-proof film as described above.

The primer layer is preferably formed of (i) a copolymer of an acrylic resin and a urethane resin and (ii) an isocyanate or a polyvinyl alcohol-based resin.

(i) a copolymer of an acrylic resin and a urethane resin, and (ii) an isocyanate, a copolymer of an acrylic resin and a urethane resin in the case of (i) is an acrylic polymer component having a hydroxyl group at the terminal (Component D) such as a diamine is added to the prepolymer by reacting with a polyester polyol component (component B) having a hydroxyl group at both ends and a diisocyanate component (component C) Followed by chain extension. By this reaction, polyester urethane is formed and an acrylic polymer component is introduced into the molecule to form an acryl-polyester urethane copolymer having a hydroxyl group at the terminal. Reacting the hydroxyl group at the end of the acryl-polyester urethane copolymer with the isocyanate of (ii) and curing.

As the component A, a straight chain acrylic ester polymer having a hydroxyl group at the terminal is used. Specifically, straight-chain polymethyl methacrylate (PMMA) having a hydroxyl group at the terminal is preferable in that it is excellent in weather resistance (in particular, the property against photodegradation) and is easily copolymerized with urethane. The component A is an acrylic resin component in the copolymer, and a compound having a molecular weight of 5,000 to 7,000 (weight average molecular weight) is preferably used because of its weather resistance and adhesiveness. The component A may be a compound having a hydroxyl group at both ends, but a compound having a conjugated double bond at one end may be mixed with the compound having a hydroxyl group at both ends.

The component B reacts with a diisocyanate to form a polyester urethane and constitutes a urethane resin component in the copolymer. As the component B, a polyester diol having a hydroxyl group at both terminals is used. Examples of the polyester diol include an addition reaction product of a diol compound having an aromatic or spirocyclic skeleton with a lactone compound or a derivative thereof or an epoxy compound, a condensation product of a dibasic acid and a diol, and a polyester compound derived from a cyclic ester compound . Examples of the diol include short chain diols such as ethylene glycol, propylene glycol, diethylene glycol, butanediol, hexanediol, and methylpentene diol; And alicyclic short-chain diols such as 1,4-cyclohexane dimethanol. Examples of dibasic acids include adipic acid, phthalic acid, isophthalic acid and terephthalic acid. Preferred as the polyester polyol is an adipic acid or a mixture of adipic acid and terephthalic acid as an acid component, particularly adipic acid, and an adipate-based polyol such as 3-methylpentene diol and 1,4-cyclohexanedimethanol as a diol component Polyester.

In the primer layer, the urethane resin component formed by reacting the component B with the component C imparts flexibility to the primer layer and contributes to improvement in adhesion. Further, the acrylic resin component comprising an acrylic polymer contributes to weather resistance and blocking resistance in the primer layer. In the urethane resin, the molecular weight of the component B is not particularly limited as long as a urethane resin capable of sufficiently exhibiting flexibility can be obtained in the primer layer, and a mixture of adipic acid or a mixture of adipic acid and terephthalic acid, In the case of a polyester diol comprising cyclohexanedimethanol, it is preferably 500 to 5000 (weight average molecular weight).

As the component C, an aliphatic or alicyclic diisocyanate compound having two isocyanate groups in one molecule is used. Examples of the diisocyanate include tetramethylene diisocyanate, 2,2,4 (2,4,4) -1,6-hexamethylene diisocyanate, isophorone diisocyanate, 4,4'-dicyclohexylmethane Diisocyanate, 1,4'-cyclohexyldiisocyanate, and the like. As the diisocyanate component, isophorone diisocyanate is preferable in terms of physical properties and cost. When the above components A to C are reacted, the equivalent ratio of the total hydroxyl groups (which may be amino groups) of the acrylic polymer, the polyester polyol and the chain extender described later to the isocyanate groups is such that the isocyanate groups are excessive.

When the above three components A, B and C are reacted at 60 to 120 ° C for about 2 to 10 hours, the isocyanate group of the diisocyanate reacts with the hydroxyl group at the end of the polyester polyol to form the polyester urethane resin component, Of diisocyanate added to the hydroxyl group is also mixed to form a prepolymer in a state in which excess isocyanate groups and hydroxyl groups remain. An acrylic polymer component is introduced into the molecule of the polyester urethane by adding a diamine such as isophoronediamine or hexamethylenediamine as a chain extender to the prepolymer and reacting the isocyanate group with the chain extender to chain- An acrylic-polyester urethane copolymer (i) having a hydroxyl group at the terminal thereof can be obtained.

(ii) is added to the acrylic-polyester urethane copolymer of the formula (i), and the coating liquid is adjusted to the required viscosity in consideration of the coating method and the amount of coating after drying, and the gravure coating method, To thereby form the primer layer. The isocyanate of (ii) is not particularly limited as long as it is capable of reacting with the hydroxyl group of the acrylic-polyester urethane copolymer of (i) to effect crosslinking curing. For example, aliphatic or aromatic isocyanates having two or more hydroxyl groups can be used, Aliphatic isocyanate is preferable in view of prevention of discoloration and weather resistance. Specific examples thereof include monomers of tolylene diisocyanate, xylylene diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, lysine diisocyanate, dimers such as dimers and trimers thereof, And polyisocyanates such as derivatives (adducts) in which a polyol is added to a polyol.

The coating amount after drying of the primer layer is 0.1 to 20 占 퐉, preferably 0.1 to 10 占 퐉. The primer layer may be a layer to which additives such as a filler such as silica powder, a light stabilizer, and a colorant are added as necessary.

The bottom cosmetic of the present invention has a moisture-proof film having a moisture permeability of 7 g / m < 2 > 24 hours or less, so that even when the bottom cosmetic material is directly adhered to the concrete slab, . Therefore, even when a decorative sheet is laminated on the front face of the floor-use cosmetic material, the occurrence of swelling and warp caused by the moisture absorption of the woody board is sufficiently suppressed. Such a bottom cosmetic material of the present invention is suitable for use in an apartment or the like directly adhering to a concrete slab.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view (one example) of a bottom cosmetic material of the present invention. FIG.
Fig. 2 is a schematic diagram of the water resistance test performed in Test Example 1. Fig.

EXAMPLES 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 embodiments.

Example  One

(1) A decorative sheet (0.16 mm) containing a synthetic resin layer was bonded to a pearl plywood (5 ply) having a thickness of 9 mm using an adhesive (BA-10L / BA-11B, 9 g / .

(2) The above was divided into three pieces by a gang saw with a length of 313 mm width x 1840 mm.

(3) The above-described back grooving machine was used to perform the back side horizontal grooves and back side vertical grooves and small-size finishing (155 mm width x 918 mm length).

(4) The above was subjected to tempering and end chamfering (145 mm width x 900 mm length) with a terriner.

(5) The groove paint was applied to the square chamfered portion (groove paint: W-SF manufactured by Showa Ink High School Show) by the above-mentioned groove coating line.

(6) On the back surface, a cushioning material including a nonwoven fabric was attached via an adhesive, and a moisture-proof film was laminated. Thus, a bottom cosmetic was produced.

The moisture-proof film was produced as follows. Namely, a biaxially stretched polyethylene terephthalate film having a thickness of 12 탆 was prepared, and a primer layer 1 comprising a two-liquid curing type urethane-based resin was formed on one surface. Further, an aluminum deposition layer was formed on the primer layer 1. The film thus obtained is referred to as a " deposited PET film ".

(Surface layer of synthetic resin base layer (PET) / vapor deposition layer / surface coat layer) was formed on the vapor deposited PET film by forming a surface coat layer (thickness 0.2 mu m (dry state)) including PVA / Respectively. The two-side curing type resin obtained by corona discharge treatment of both sides of the laminate and then adding a curing agent (isocyanate) to the subject (mixture of urethane resin and vaginal type resin) was coated with a coating amount of 5 탆 as a solid content by gravure printing To form adhesive primer layers 2 and 3 on both sides. As a result, a moisture-proof film was obtained. The moisture permeability of the moisture-proof film was 1 g / m 2 24 hours.

Example  2

A flooring cosmetic material was prepared in the same manner as in Example 1 except that a layered product of foamed urethane and foamed polyethylene was used as the cushioning material in (6). Specifically, as a cushioning material, a laminated body of foamed urethane made by Achilles and foamed polyethylene made by Toray (total thickness of 5 mm) was used.

Example  3

A flooring cosmetic material was prepared in the same manner as in Example 1 except that the surface coat layer of the moisture-proof film was made of a urethane resin. The moisture permeability of this moisture-proof film was 3 g / m 2 24 hours.

Example  4

In the same manner as in Example 1 except that a moisture-impermeable film obtained by forming a surface coat (thickness: 0.1 m) of a polyvinyl alcohol-based resin on a biaxially stretched polypropylene film (OPP film, Likewise, a bottom cosmetic was produced. The moisture permeability of the moisture-proof film was 4.5 g / m 2 24 hours.

Example  5

In the above (6), a surface coat (thickness: 0.1 탆) of a polyvinyl alcohol resin was formed on one side of the OPP film (thickness: 20 탆) as the humidity-resistant film and the primer layer 3 for bonding was formed on the other side , A bottom cosmetic material was prepared in the same manner as in Example 1. [ The moisture permeability of the moisture-proof film was 4.5 g / m 2 24 hours.

Example  6

A flooring cosmetic material was prepared in the same manner as in Example 1 except that OPP film (thickness 30 탆) was used as moisture-proof film in (6). The moisture permeability of the moisture-proof film was 6 g / m 2 24 hours.

Example  7

Except that the primer layer 3 for bonding was formed on the OPP film (thickness 30 탆) as the moisture-proofing film in the above (6), and the moisture-proofing film formed by adhering the primer layer 3 for bonding to the base was used 1, the bottom cosmetic material was prepared. The moisture permeability of the moisture-proof film was 6 g / m 2 24 hours.

Example  8

A flooring cosmetic material was prepared in the same manner as in Example 1 except that a polyethylene resin film (PE, moisture permeability: 7 g / m 2 · 24 hours) having a thickness of 60 μm was used as the moisture-impermeable film in the step (6).

Comparative Example  One

A bottom cosmetic material was prepared in the same manner as in Example 1 except that a laminate of a nonwoven fabric and a spunbond (polystyrene + polyethylene) was used as the cushioning material and the moisture-proofing sheet was not laminated. Specifically, a cushioning material for L45 type manufactured by Kureha Tech was used. As a reference value, the moisture permeability of the spunbond is 20 g / m 2 24 hours.

Comparative Example  2

In the same manner as in Example 1 except that moisture-proof paper (polyethylene (thickness 30 占 퐉) was used as a core layer and both surfaces thereof were laminated with paper: water vapor permeability: 10 g / m2 占 24 hours) To make a flooring cosmetic material.

< Example  And Comparative example  Layer construction of moisture-proof film>

The layer structures of the following Examples 1 to 8 and Comparative Examples 1 to 2 are described in order from the front.

Example 1: (Nawang plywood) / (nonwoven cushioning material) / primer layer 2 / PVA / aluminum deposition / primer layer 1 / PET / primer layer 3 /

Example 2: (Nawang plywood) / (foamed urethane / foamed polyethylene cushioning material) / primer layer 2 / PVA / aluminum deposition / primer layer 1 / PET / primer layer 3 /

Example 3: (Nawang plywood) / (nonwoven cushioning material) / primer layer 2 / urethane resin / aluminum deposition / primer layer 1 / PET / primer layer 3 /

Example 4: (Nawang plywood) / (nonwoven cushioning material) / OPP / PVA / (mortar)

Example 5: (Nawang plywood) / (nonwoven cushioning material) / PVA / OPP / primer layer 3 / (mortar foundation)

Example 6: (Nawang plywood) / (non-woven cushioning material) / OPP / (mortar)

Example 7: (Nawang plywood) / (non-woven cushioning material) / OPP / primer layer 3 / (mortar foundation)

Example 8: (Nawang plywood) / (non-woven cushioning material) / PE / (mortar base)

Comparative Example 1: (Nawang lumber) / (nonwoven cushioning material) / spun bond (polystyrene / PE) / (mortar)

Comparative Example 2: (Nawang plywood) / (Non-woven cushioning material) / Paper / PE / Paper / (Mortar)

Test Example 1 (Water resistance test)

(1) A plastic plate (1.5 m x 2 m) with a sponge mat attached to its surface was prepared. The metal frame was fixed on the ground with a distance of 900 mm.

(2) Spraying was performed on the surface of the ground so that the surface of the ground was always wet.

(3) The floor material was set in a state in which the bottom portion of the floor material reached the upper and lower metal frames (a schematic diagram of the set state is shown in Fig. 2). That is, it is set in a state of suppressing elongation in the longitudinal direction.

(4) Observation of the condition of the flooring (warpage, wavy shape, etc.) and water content were performed according to the time lapse (1 week, 2 weeks, 3 weeks). Watering was carried out regularly, and the surface of the base plate was always kept wet. Moisture content was measured using a wood moisture meter (product name: "Turk" Ketkagakukenishyusho).

The results are shown in Table 1.

[In Table 1, the unit of the moisture permeability is g / m 2 24 hours. The moisture permeability shows the moisture permeability of the moisture permeable film, while the comparative example 1 is a reference value showing the moisture permeability of the spun bond.

As apparent from the results of Table 1, the bottom cosmetic material of the present invention provided with the moisture-proof film having the moisture permeability of 7 g / m &lt; 2 &gt; 24 hours or less has moisture absorption on the woody board effectively suppressed by the presence of the moisture- As a result, warpage and expansion of the bottom cosmetic material are prevented.

Test Example 2 (Adhesion Test)

· The bottom cosmetic material was applied to the mortar (concrete slab) using an adhesive (KU928RS) manufactured by Konishi. The application amount of the adhesive was 400 g / m &lt; 2 &gt;.

The flooring cosmetic material applied in the above was cured by the following method, and then evaluated for adhesion (peeling state) by forced separation.

· Cure for one week under room temperature environment (state (normal) adhesion)

· Curing for one week under an environment of 50 ° C × 90% RH (wet heat adhesion)

The results are shown in Table 2.

The "cushioning material / material breakage" in the peeling state means that the cushioning material itself is broken when the flooring cosmetic material is forcibly peeled off. The term &quot; film / adhesive interface &quot; means that the moisture-proof film is peeled off from the mortar base. Further, &quot; peeling between the moisture proof paper &quot; means that the moisture proof paper is peeled off from the bottom cosmetic material.

When the primer layer 3 was formed on the moisture-proofing film, adhesion with the mortar base was improved. When the moisture-proofing film of Comparative Example 2 was a moisture-proofing paper, peeling strength between the moisture-proofing paper was lowered because the paper absorbed moisture.

1: Facial sheet
2: Wooden plate with notched groove on the back side
3: Cushioning material
4: Moisture-proof film
5: Metal frame
6: Plate (sponge / plastic plate)
7: Floor coverings

Claims (4)

A decorative article for floor having a decorative sheet laminated on a front surface of a wooden board and a moisture-proofing film laminated on the back surface of the wooden board through a cushioning material,
The humidity-proof film has a moisture permeability of 3 g / m &lt; 2 &gt; 24 hours or less at a temperature of 40 DEG C and a humidity of 90%
Wherein the cushioning material is a nonwoven fabric,
The moisture-proof film comprises a surface coat layer / a vapor deposition layer / a primer layer 1 / a synthetic resin base layer,
Wherein the surface coat layer is formed of at least one member selected from the group consisting of a polyvinyl alcohol resin, a urethane resin, and a polyvinylidene chloride resin, and a silane coupling agent. The bottom cosmetic material according to claim 1, wherein the wood plate has a notched groove formed on a back surface thereof. The bottom cosmetic material according to claim 1, further comprising a primer layer (2) on the front surface of the moistureproof film. The bottom cosmetic material according to claim 1, further comprising a primer layer (3) on the back side of the moisture-proof film.

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