KR20110129892A - Decorative material for flooring - Google Patents

Abstract

The present invention uses floor replacement materials having a dimensional change amount per 1% water content change of more than 0.02% as a wood substrate, and even when a makeup sheet having low moisture permeability is laminated on its surface, warping and warping are suppressed. Provide ash. Specifically, the present invention is a flooring decorative material in which a makeup sheet is laminated on the surface of a wooden base material and a moisture proof film is laminated on the back side of the wooden base material. The amount of dimension change is larger than 0.02%, and (2) The said moisture proof film provides the floor decorative material characterized by the moisture permeability of 7 g / m <2> * 24 hours or less.

Description

Floor cosmetics {DECORATIVE MATERIAL FOR FLOORING}

The present invention relates to a flooring decorative material in which warping and warping are suppressed.

Conventionally, as a wood-based decorative board used as a floor decorative material for a house, a cosmetic sheet having a design of natural wood through an adhesive on an upper surface of a wooden base material (for example, a lumber plywood of hardwoods) obtained from high-quality solid wood. It is known to adhere.

As a wood base material, the king of the hardwood is used abundantly, but, in recent years, the availability of timber is difficult due to the lack of natural resources, the restriction of timber felling, and the shortage of materials is progressing. This problem is particularly acute in hardwoods such as Nawang. Therefore, the development of the wood base material which can be used instead of the Nawang plywood is advanced. As a substitute material, for example, a wood board (for example, medium density wood fiber board: MDF, high density wood fiber board: HDF) formed by molding and solidifying wood fibers or wood pieces separated from coniferous plywood, wood waste, etc. with an adhesive. There is a composition water plywood consisting of particle board: PB) and composition water.

However, these low king replacement materials have a problem in that the amount of dimensional change per 1% moisture content change is larger than that of the low king plywood, and the dimensional change is likely to occur due to changes in the surrounding environment. Specifically, the amount of dimensional change per 1% water content of the low king plywood is 0.015 to 0.02%, but about 0.045% in MDF and PB, and about 0.025% in softwood plywood (for example, radiata pine). Therefore, the low king substitute material has the characteristic which a warpage and a distortion (deviation of the right angle of a bottom face) are easy to produce with a change of humidity.

In order to improve the said problem, it is proposed to laminate | stack a moisture proof sheet on the back surface of a low king substitute material (for example, patent documents 1-3). However, the moisture-proof moisture-permeable sheets of patent documents 1-3 are about 20 g / m <2> * 24 hours at most, and performance is inadequate in order to prevent curvature and distortion of a low king substitute material. In particular, in recent years, since a makeup sheet having a low moisture permeability (2 g / m 2 · 24 hours or less) is often laminated on the surface of a wangwang replacement material, it is required to reduce the moisture permeability of the back side to be equal to the surface or to further reduce the moisture permeability.

As described above, even when a laminar replacement material having a dimensional change per 1% water content change is greater than 0.02% as a wood substrate, and a cosmetic sheet having low moisture permeability is laminated on the surface thereof, the occurrence of warp and warp is suppressed. Development is desired.

Japanese Patent Laid-Open No. 2001-193267 Japanese Patent Laid-Open No. 2001-260109 Japanese Patent Laid-Open No. 2006-097321

The present invention uses floor replacement materials having a dimensional change amount per 1% water content change of more than 0.02% as a wood substrate, and even when a makeup sheet having low moisture permeability is laminated on its surface, warping and warping are suppressed. The purpose is to provide ash.

MEANS TO SOLVE THE PROBLEM As a result of earnestly researching, the present inventors discovered that the said objective can be achieved when using a specific moisture proof film, and came to complete this invention.

That is, this invention relates to the following decorative cosmetics for floors.

1. A makeup sheet is laminated on the surface of a wooden substrate and a moisture-proof film is laminated on the back surface of the wooden substrate,

(1) The said wood base material has a dimension change amount per 1% moisture content change larger than 0.02%,

(2) The moisture-proof film has a moisture permeability of 7 g / m 2 · 24 hours or less, the flooring makeup material.

2. The makeup sheet is laminated on the surface of the wooden base material, and the moisture-proof film is laminated on the back surface of the wooden base material,

(1) The said wood base material has a dimension change amount per 1% moisture content change larger than 0.02%,

(2) The moisture-proof film has moisture permeability of 7 g / m 2 · 24 hours or less,

(3) The wood base material has an average water content of 6 to 10% by weight, and the water content of the central part is in the range of -1% to + 2% compared to the water content of the peripheral part.

3. The said wood base material is the bottom of Claim 1 or 2 which is at least 1 sort (s) chosen from the group which consists of a medium density wood fiber board (MDF), a high density wood fiber board (HDF), a particle board (PB), a softwood plywood, and a composition water plywood. For cosmetics.

4. The said moisture proof film is a floor decorative material of said claim | item 1 or 2 which has at least a synthetic resin base material layer and a vapor deposition layer.

5. The said moisture proof film is a floor decorative material of said claim | item 4 which has a primer layer between the said synthetic resin base material layer and the said vapor deposition layer.

6. The said moisture proof film is a floor use decorative material of said claim | item 4 which consists of the said synthetic resin base material layer / primer layer / said vapor deposition layer / surface coating layer.

7. Floor decorative material of said claim | item 4 which further has a primer layer in the single side | surface or both surfaces of the said moisture proof film.

8. The said decorative sheet and the moisture proof film are the floor decorative materials of said claim | item 1 or 2 laminated | stacked on the said wooden base material with an adhesive agent.

9. Floor decorative material of said 1 or 2 which is flooring material for floor heating.

EMBODIMENT OF THE INVENTION Hereinafter, the decorative cosmetics for floors of this invention is demonstrated in detail.

The floor decorative material of the present invention is a floor decorative material in which a makeup sheet is laminated on a surface of a wooden base material, and a moisture proof film is laminated on the back surface of the wooden base material,

(1) The said wood base material has a dimension change amount per 1% moisture content change larger than 0.02%,

(2) The moisture proof film is characterized by having a water vapor transmission rate of 7 g / m 2 · 24 hours or less. In addition, a water vapor transmission rate is a measured value in 40 degreeC temperature and 90% RH environment of humidity according to JISZ0208 (water vapor transmission test method (cup method)). Hereinafter, the water vapor transmission rate in this specification shows the measured value in the said conditions.

The moisture permeability of the back surface of a wooden base material is suppressed low by having the moisture-proof film whose water vapor transmission rate is 7 g / m <2> * 24 hours or less of the floor decorative material of this invention which has the said characteristic. Therefore, even when a low moisture-permeable makeup sheet is laminated on the surface using a lumber substitute material having a dimensional change amount per 1% water content change of more than 0.02% as the wood substrate, the moisture permeability of the wood substrate surface and the back surface can be set to the same degree. Therefore, generation of warpage and distortion of the flooring decorative material are sufficiently suppressed. Such a floor decorative material of the present invention is suitable as a floor decorative material to be applied to the floor surface of various buildings and a floor decorative material to be used for floor heating as a special use.

Hereinafter, each structure of the floor decorative material of this invention is demonstrated.

(Wooden material)

As the wood base material of the present invention, a low king replacement material is used. That is, it is a material substituted with the conventional king king plywood etc., For example, at least 1 sort (s) of a medium density wood fiber board (MDF), a high density wood fiber board (HDF), a particle board (PB), a softwood plywood, a composition water plywood, etc. are used. . Examples of the composition water include poplar, falkata, acacia, camerele, eucalyptus, and terminalia. In these low king replacement materials, the amount of dimensional change per 1% moisture content change is greater than 0.02%.

In addition, "the dimension change amount per 1% water content" in this specification is the dimension change amount measured by the following procedure.

(1) Prepare a test piece of wood substrate cut to 300 mm x 303 mm.

(2) Under normal temperature (25 degreeC) environment, the present dimension (length of 4 sides) of a test piece is measured by the caliper.

(3) The test piece is left to stand in a 40 degreeC oven (humidity, dry atmosphere # 0%) for 1 week.

(4) After one week, the weight and dimensions (length of four sides) of the test piece are measured.

(5) The dimensional change rate per 1% moisture content change is measured from the measurement data of both conditions.

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

In the present invention, when the floor cosmetics are cut and used according to the construction site, it is provided, and as a wood base material, the average water content is 6 to 10% by weight, and the water content of the center part is -1% to that of the peripheral part. Preference is given to using wood substrates in the range of + 2%. When the size of the wood base material is 150 mm long x 1840 mm wide (in particular, the length of the short side is 200 mm or less), warpage or warpage tends to occur due to the bias of the moisture content of the central and peripheral portions of the wood base material. Therefore, by setting the moisture content characteristics of the wood base material under the above conditions, it is possible to suppress the occurrence of warpage and warping even when the floor decorative material is cut out and used. Moreover, as a case where the floor cosmetic material is cut out and used, the case where it installs on the corner part (the side of a wall or the periphery of a pillar) which a floor cosmetic material is constructed specifically can be assumed.

6-10 weight% is preferable and, as for the average moisture content of a wood base material, 6.5-8 weight% is more preferable. If average moisture content is in the said range, it will be easy to suppress the distortion and curvature after a cut. Especially, when using a floor decorative material for floor heating use, it is preferable to set an average moisture content to 6 to 9 weight%.

The water content of the wood substrate is preferably in the range of -1% to + 2%, more preferably in the range of -0.5% to + 1%, compared to the water content of the center portion. In addition, the periphery of a wood base material means the range of 5 cm around a wood base material, and the center part of a wood base material means the inside of a wood base material except the said peripheral part.

In addition, the average moisture content and water content difference (Hereinafter, "water content difference" shows the water content difference of the periphery part and center part of a wood base material) of a wood base material in this specification is a value measured in the following procedure.

(A) As shown in Fig. 3, a wood substrate having a length of 303 mm x 1818 mm in width is prepared.

(B) The range of 5 cm from the periphery of a wood base material is made into a peripheral part, and the inside is made into a center part rather than that. As shown to 1-35 in FIG. 3, 35 samples of 5 cm x 5 cm are taken | homogenously and water content is measured by the complete drying method. A complete drying method is a method of measuring the moisture content of each sample from the following formula after leaving each sample in 105 degreeC oven. Before leaving is carried out before treatment and after leaving is after treatment.

Moisture content (%) = {(weight before treatment-weight after treatment) / weight after treatment} × 100

(C) Let the average value of 35 samples be "average moisture content."

(D) The value which subtracted the average value of the sample of 20 periphery from the average value of the sample of 15 center part is made into "the water content difference".

(Cosmetic sheet)

The makeup sheet is laminated | stacked on the surface of a wooden base material. As a makeup sheet, it is preferable that the water vapor transmission rate in temperature 40 degreeC and 90% of humidity is 7 g / m <2> * 24 hours or less, and it is more preferable that it is 5 g / m <2> * 24 hours or less. Although the structure of a makeup sheet is not restrict | limited, For example, it is preferable to have a pattern layer (solid ink layer, pattern ink layer), a transparency resin layer, and a surface protective layer on a base material sheet in order. Hereinafter, this makeup sheet is demonstrated as an example.

Examples of the base sheet include 1) paper such as foil paper, fine paper, kraft paper, Japanese paper, titanium paper, resin impregnated paper, and paper reinforced paper, and 2) wood fiber, glass fiber, asbestos, polyester fiber, vinylon fiber, and rayon fiber. 1 type, or 2 or more types of laminated body among synthetic resin sheets, such as a woven fabric or nonwoven fabric which consists of 3, polyolefin, polyester, polyacryl, polyamide, polyurethane, polystyrene, etc. are mentioned.

As for the thickness of a base material sheet, about 20-300 micrometers is preferable. The base sheet may be colored as needed. The surface may be subjected to surface treatment such as corona discharge treatment, plasma treatment, and 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, silk screen printing, or the like. The pattern of the patterned ink layer includes, for example, wood grain, stone grain, cloth texture, leather pattern, geometric pattern, letters, symbols, line drawing, various abstract shapes, and the like. The solid ink layer is obtained by solid printing of the coloring ink. The pattern layer is composed of one or both of a pattern ink layer and a solid ink layer.

Examples of the ink used for the pattern layer include chlorinated polyolefins such as chlorinated polyethylene and chlorinated polypropylene, polyurethanes made of polyester, isocyanates and polyols, polyacryl, polyvinyl acetate, polyvinyl chloride, and vinyl chloride-vinyl acetate air. One or two or more kinds of copolymers, cellulose resins, polyamide resins, and the like may be used, and pigments, solvents, various auxiliary agents, etc. may be added thereto, and inkized ones may be used. Among these, 1 type, or 2 or more types of mixtures, such as polyurethane, a polyacryl, polyamide resin, etc. which consist of polyester, an isocyanate, and a polyol from a viewpoint of environmental issues, adhesiveness with a printed surface, etc. are preferable.

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

Specifically, soft, semi-rigid or hard polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-acrylic acid ester air Copolymer, ionomer, acrylic acid ester, methacrylic acid ester, etc. are mentioned. Among the above, polyolefin resin, such as polypropylene, is preferable.

The transparent resin layer may be colored. In this case, what is necessary is just to add a coloring agent to a thermoplastic resin. As a coloring agent, the pigment or dye used by a pattern layer can be used.

Even if it contains various additives, such as a filler, a gloss scavenger, a foaming agent, a flame retardant, a lubricant, an antistatic agent, antioxidant, a ultraviolet absorber, a light stabilizer, a radical trapping agent, and a soft component (for example, rubber), good.

The surface protective layer (transparent surface protective layer) is formed in order to impart surface properties such as scratch resistance, abrasion resistance, water resistance and stain resistance required for the makeup sheet. As resin which forms this surface protection layer, curable resin, such as thermosetting resin or ionizing radiation curable resin, is preferable. In particular, ionizing radiation curable resins are preferred from the viewpoint of high surface hardness, productivity, and the like.

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

Hardening agents, such as a crosslinking agent and a polymerization initiator, and a polymerization accelerator can be added to the said resin. For example, as a hardener, isocyanate, organic sulfonate, etc. can be added to unsaturated polyester resin, polyurethane resin, etc., organic amine, etc. can be added to an epoxy resin, peroxides, such as methyl ethyl ketone peroxide, and azoiso Radical initiators, such as butylnitrile, can be added to unsaturated polyester resin.

As a method of forming a surface protection layer with a thermosetting resin, the method of apply | coating a solution of a thermosetting resin by coating methods, such as a roll coating method and the gravure coating method, for example, and drying and hardening is mentioned. As application amount of a solution, it is about 5-30 micrometers in solid content, Preferably it is about 5-20 micrometers.

The ionizing radiation curable resin is not limited as long as it generates a crosslinking polymerization reaction by irradiation with ionizing radiation and changes to a three-dimensional polymer structure. For example, one or more types of prepolymers, oligomers and monomers having a polymerizable unsaturated bond or an epoxy group crosslinkable by ionizing radiation in a molecule can be used. For example, acrylate resin, such as urethane acrylate, polyester acrylate, and epoxy acrylate; Silicon resins such as siloxane; Polyester resins; Epoxy resin etc. are mentioned.

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

As an ultraviolet source, light sources, such as an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc lamp, a black light fluorescent lamp, and a metal halide lamp, can be used. As wavelength of an ultraviolet-ray, it is about 190-380 nm.

As an electron beam source, various electron beam accelerators, such as a cocroft Walton type, a half degraft type | mold, a resonant transformer type | mold, an insulation core transformer type | mold, a linear type | mold dynatron type | mold, and a high frequency type, can be used, for example. As energy of an electron beam, about 100-1000 keV is preferable and about 100-300 keV is more preferable. As for the irradiation amount of an electron beam, about 2-15 Mrad is preferable.

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

The photoinitiator in the case of resin system which has a radically polymerizable unsaturated group, for example, acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ether, Michler's benzoyl benzoate, Michler's ketone, diphenyl At least one of sulfide, dibenzyl disulfide, diethyloxide, triphenylbiimidazole, isopropyl-N, N-dimethylaminobenzoate and the like can be used. Moreover, when it is resin system which has a cationically polymerizable functional group, at least 1 sort (s) of an aromatic diazonium salt, an aromatic sulfonium salt, a metallocene compound, benzoin sulfonic acid ester, a furyloxy sulfoxium diallyl iodosil salt, etc. 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 of forming a protective layer from an ionizing radiation curable resin, what is necessary is just to apply the solution of an ionizing radiation curable resin by application methods, such as the gravure coating method and the roll coating method, for example. As application amount of a solution, it is about 5-30 micrometers as solid content, Preferably it is about 5-20 micrometers.

What is necessary is just to mix | blend an inorganic filler, when providing scratch resistance and abrasion resistance further to the surface protection layer formed from the ionizing radiation hardening type resin. As the inorganic filler, for example, 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, diamond, Geumgangsa, glass fiber, etc. are mentioned.

As addition amount of an inorganic filler, it is about 1-80 weight part with respect to 100 weight part of ionizing radiation curable resins.

Lamination | stacking of each layer forms a patterned layer (solid ink layer, a patterned ink layer) in order on one side of a base material sheet, for example, and then it is well-known dry, such as a two-component curable urethane resin, on a patterned layer. The transparent resin layer can be laminated by the dry lamination method, the T-die extrusion method, etc. via the adhesive for lamination, and can be performed by the method of forming a surface protection layer further.

You may form an uneven | corrugated shape by performing embossing from the surface protective layer side. The uneven shape can be formed by hot pressing, hairline processing, or the like. Examples of the concave-convex shape include conduit grooves, slab surface concave-convex, cloth surface textures, pear husks, sand grains, hairlines, and stripe grooves.

The said makeup sheet may have a synthetic resin layer (so-called backer layer) of 100 micrometers or more in thickness in a lowermost layer (layer which adhere | attaches with a wooden base material). In addition, a backer layer means the buffer layer for the purpose of shock absorption etc. in a floor decorative material. Examples of the material constituting the backer layer include polypropylene, ethylene-vinyl alcohol copolymer, polymethylene, polymethylpentene, polyethylene terephthalate, and polyalkylene terephthalate having high heat resistance. So-called trade name PET-G (manufactured by Eastman Chemical Company)], polybutylene terephthalate, polyethylene naphthalate, polyethylene naphthalate-isophthalate, which is polyethylene terephthalate substituted with 1,4-cyclohexanedimethanol or diethylene glycol. Copolymers, polycarbonates, polyarylates, polyimides, polystyrenes, polyamides, ABS and the like. 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, 600 micrometers is suitable.

When laminating the makeup sheet on a wooden substrate, a known adhesive can be used. As an adhesive agent, the adhesive which uses polyvinyl acetate, polyvinyl chloride, a vinyl chloride vinyl acetate copolymer, an ethylene acrylic acid copolymer, an ionomer, butadiene acrylonitrile rubber, neoprene rubber, a natural rubber etc. as an active ingredient is used, for example. Can be mentioned. Although the thickness of an adhesive bond layer is not limited, About 0.1-50 micrometers is preferable.

(Moisture-proof film)

A moisture proof film is provided in the back surface of a wooden base material. In this invention, the moisture proof film uses the thing of 7 g / m <2> * 24 hours or less in the water vapor transmission rate in temperature 40 degreeC and 90% of humidity. Especially, it is preferable that water vapor transmission rate is 5 g / m <2> * 24 hours or less.

The moisture proof film is not limited as long as the moisture permeability is satisfied. Examples thereof include synthetic resins such as olefinic thermoplastic resins such as polyethylene and polypropylene, polyethylene terephthalate, polybutylene terephthalate, and ester thermoplastic resins such as polyethylene naphthalate. A film can be used. Among these, it is especially preferable to have at least a synthetic resin base material layer and a vapor deposition layer. Hereinafter, this form is illustrated and demonstrated.

Examples of the synthetic resin substrate layer include olefinic thermoplastic resins such as polyethylene, polypropylene, ethylene-propylene copolymers, ethylene-vinyl alcohol copolymers, and mixtures thereof; Ester-based thermoplastic resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyethylene naphthalate-isophthalate copolymer, polycarbonate and polyarylate; Acrylic thermoplastic resins such as polymethyl methacrylate, polyethyl methacrylate, and butyl polyacrylate; Non-halogen-type thermoplastic resins, such as a polyimide, a polyurethane, a polystyrene, and an acrylonitrile butadiene-styrene resin, etc. are mentioned.

The sheet | seat extended | stretched to the uniaxial or biaxial direction may be sufficient as the synthetic resin base material layer, and unstretched may be sufficient as it. As for the synthetic resin base material layer, it is preferable that a vapor deposition layer is further laminated | stacked, and the sheet extended | stretched in biaxial direction is preferable at the position as a base material on which a vapor deposition layer is formed, for the reason that a mechanical strength is strong and it is excellent in dimensional stability. Do. About 9-25 micrometers is suitable for the thickness of the synthetic resin base material layer.

As an evaporation layer, the inorganic oxide vapor deposition layer which consists of an inorganic oxide thin film represented by an inorganic vapor deposition layer which consists of an inorganic thin film which consists of a metal thin film represented by aluminum, silicon oxide, magnesium oxide, and aluminum oxide is mentioned. The vapor deposition layer is formed on a synthetic resin substrate layer by known vapor deposition methods such as vacuum vapor deposition and plasma activated chemical reaction vapor deposition. More preferably, the deposition layer is a transparent inorganic oxide deposition layer.

In order to further improve the gas barrier property of the vapor deposition layer, a surface coating layer may be formed on the vapor deposition layer. Polyvinyl alcohol-type resin is mentioned as a surface coating layer. In addition, the formula R ¹ _n M (OR ² ) _m (wherein, R ¹ , R ² represents an organic group having 1 to 8 carbon atoms, M represents a metal atom, n represents an integer of 0 or more, m is At least one alkoxide represented by an integer of 1 or more, n + m represents the valence of M), a polyvinyl alcohol-based resin and / or an ethylene-vinyl alcohol copolymer, and further a sol-gel method catalyst. And a composition produced by polycondensation by the sol-gel method in the presence of acid, water, and an organic solvent. In addition, by combining polyvinyl alcohol and ethylene-vinyl alcohol copolymer, gas barrier properties, water resistance, weather resistance, and the like are remarkably improved. You may add a silane coupling agent etc. to the said composition. The surface coating layer is obtained by apply | coating these resin or composition on a vapor deposition layer by well-known coating methods, such as a roll coating method and the gravure coating method. The surface coating layer also functions as a protective layer of the vapor deposition layer, and the thickness thereof is suitably about 1 to 10 mu m.

The said synthetic resin base material layer and / or the said surface coating layer can perform surface treatment, such as corona treatment, as needed. By such a surface treatment, the adhesive strength with an adjacent layer can be raised further.

In this invention, you may further form a primer layer between a synthetic resin base material layer and a vapor deposition layer, and the single side | surface or both surfaces of a moisture proof film. Therefore, the suitable form of a moisture proof film is a form of "the synthetic resin base material layer / primer layer / vapor deposition layer / surface coating layer", for example, and the form which further provided the primer layer in the single side | surface or both surfaces of the said moisture proof film may be sufficient. .

These primer layers are formed in order to improve the adhesiveness of a synthetic resin base material layer and a vapor deposition layer, and to improve the adhesiveness at the time of laminating | stacking a moisture proof film to another layer.

As resin used for such a primer layer, ester resin, urethane resin, acrylic resin, polycarbonate resin, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral resin, nitrocellulose resin etc. are mentioned, These resins can be used alone or in combination. Formation of a primer layer can be performed using suitable coating means, such as a roll coating method and the gravure printing method.

Especially, it is preferable to form a primer layer from the copolymer of (i) acrylic resin and urethane resin, and (ii) isocyanate. That is, the copolymer of the acrylic resin of (i) and a urethane resin is the acrylic polymer component (component A) which has a hydroxyl group at the terminal, the polyester polyol component (component B) which has a hydroxyl group at both ends, and the diisocyanate component (component C). ) Is reacted to form a prepolymer, which is obtained by further adding a chain extender (component D) such as diamine to the prepolymer and chain extending. By this reaction, a polyester urethane is formed and an acrylic polymer component is introduce | transduced in a molecule | numerator, and the acryl- polyesterurethane copolymer which has a hydroxyl group at the terminal is formed. The hydroxyl group of the terminal of this acryl- polyesterurethane copolymer is reacted with the isocyanate of (ii), and it hardens and forms.

As said component A, the linear acrylic acid ester polymer which has a hydroxyl group at the terminal is used. Specifically, linear polymethyl methacrylate (PMMA) having a hydroxyl group at the terminal is preferable in that it is excellent in weather resistance (particularly in terms of photodegradation) and easily copolymerized with urethane. The said component A consists of an acrylic resin component in a copolymer, and since molecular weight 5000-7000 (weight average molecular weight) is especially favorable in weather resistance and adhesiveness, it is used preferably. In addition, although the said component A may use only what has a hydroxyl group at both ends, you may mix and use what has a hydroxyl group at both terminal mentioned above that the conjugated double bond remains at one terminal.

The said component B reacts with diisocyanate and forms polyester urethane, and comprises a urethane resin component in a copolymer. As the component B, a polyesterdiol 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 spiro ring skeleton with a lactone compound or a derivative thereof, an epoxy compound, a condensation product of a dibasic acid and a diol, a polyester compound derived from a cyclic ester compound, and the like. Can be mentioned. Examples of the diol include short-chain diols such as ethylene glycol, propylene glycol, diethylene glycol, butanediol, hexanediol, and methylpentenediol; Alicyclic short-chain diol, such as 1, 4- cyclohexane dimethanol, etc. are mentioned. Examples of the dibasic acid include adipic acid, phthalic acid, isophthalic acid, terephthalic acid and the like. As the polyester polyol, adipic acid or a mixture of adipic acid and terephthalic acid is preferable as an acid component, especially adipic acid, and an adipate system using 3-methylpentenediol and 1,4-cyclohexanedimethanol as a diol component Polyester.

In the said primer layer, the urethane resin component formed by reaction of the said component B and the said component C gives a softness to the said primer layer, and contributes to the adhesive improvement. Moreover, the acrylic resin component which consists of an acrylic polymer contributes to weather resistance and blocking resistance in the said primer layer. The urethane resin WHEREIN: The molecular weight of the said component B should just be a range from which the urethane resin which can fully exhibit the flexibility to the said primer layer is obtained, adipic acid or a mixture of adipic acid and terephthalic acid, 3-methylpentanediol, and 1, 4- In the case of the polyesterdiol which consists of cyclohexane dimethanol, 500-5000 (weight average molecular weight) are preferable.

As said component C, the aliphatic or alicyclic diisocyanate compound which has two isocyanate groups in 1 molecule is used. As this diisocyanate, for example, tetramethylene diisocyanate, 2,2,4 (2,4,4) -1,6-hexamethylene diisocyanate, isophorone diisocyanate, 4,4'- dicyclohexyl methane di Isocyanate, 1,4'- cyclohexyl diisocyanate, etc. are mentioned. As the diisocyanate component, isophorone diisocyanate is preferable in view of physical properties and cost. The equivalent ratio of the hydroxyl group (which may be an amino group) and the isocyanate group of the sum total of the acrylic polymer, polyester polyol, and chain extender mentioned later when reacting said components A-C makes an isocyanate group excess.

When the above-mentioned 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 of the polyester polyol terminal to form a polyester urethane resin component and The compound in which diisocyanate was added to the hydroxyl group is also mixed, and the prepolymer of the state in which the excess isocyanate group and the hydroxyl group remain | survives is formed. As the chain extender, for example, diamines such as isophoronediamine and hexamethylenediamine are added to the prepolymer, and an isocyanate group is reacted with the chain extender, followed by chain extension. And the acryl-polyesterurethane copolymer of (i) which has a hydroxyl group at the terminal can be obtained.

The isocyanate of (ii) is added to the acryl-polyesterurethane copolymer of (i), and the coating liquid adjusted to the required viscosity considering the coating method and the drying amount after drying is formed, and the gravure coating method and the roll coating method What is necessary is just to form the said primer layer by apply | coating by well-known coating methods, such as these. Moreover, what is necessary is just to be able to react with the hydroxyl group of the acryl- polyesterurethane copolymer of (i), and to harden crosslinking as an isocyanate of (ii), for example, divalent or more aliphatic or aromatic isocyanate can be used, and especially heat In terms of discoloration prevention and weather resistance, aliphatic isocyanates are preferred. Specifically, multimers such as tolylene diisocyanate, xylylene diisocyanate, 4,4'-dicyclohexyl methane diisocyanate, hexamethylene diisocyanate, monomers of lysine diisocyanate, dimers and trimers thereof, or these And polyisocyanates such as derivatives (adducts) in which isocyanate is added to a polyol.

Moreover, as coating amount after drying of the said primer layer, it is 1-20g / m <2>, Preferably it is 1-5g / m <2>. In addition, the said primer layer may be used as a layer which added additives, such as fillers, such as a silica powder, a light stabilizer, and a coloring agent, as needed.

A well-known adhesive agent can be used when laminating | stacking the said moisture proof sheet on a wooden base material. As an adhesive agent, the adhesive which uses polyvinyl acetate, polyvinyl chloride, a vinyl chloride vinyl acetate copolymer, an ethylene acrylic acid copolymer, an ionomer, butadiene acrylonitrile rubber, neoprene rubber, a natural rubber etc. as an active ingredient is used, for example. Can be mentioned. Although the thickness of an adhesive bond layer is not limited, About 0.1-50 micrometers is preferable.

The moisture permeability of the back surface of a wooden base material is suppressed low by having the moisture-proof film whose moisture vapor transmission degree is 7 g / m <2> * 24 hours or less of the floor decorative material of this invention. Therefore, even when a low moisture-permeable makeup sheet is laminated on the surface using a lumber substitute material having a dimensional change amount of 1% moisture content change of more than 0.02% as the wood substrate, the moisture permeability of the wood substrate surface and the back surface can be set to the same degree. Therefore, generation of warpage and distortion of the flooring decorative material are sufficiently suppressed. Such a floor decorative material of the present invention is suitable as a floor decorative material to be applied to the floor surface of various buildings and a floor decorative material to be used for floor heating as a special use.

1 is a schematic diagram (an example) of the flooring decorative material of the present invention.
It is a schematic diagram which shows the curvature and distortion of the makeup material for floors.
It is a figure which shows the sample used for the measurement of the average moisture content and moisture content difference of a wood base material.
4 is a schematic diagram of floor heating system test criterion II.

An Example and a comparative example are described to the following and this invention is demonstrated in more detail. However, this invention is not limited to an Example.

Example 1

(1) A cosmetic sheet (0.4 mm) containing a synthetic resin layer was applied to the surface of a 5.5 mm thick MDF (wooden base) using a Juori Kogyo adhesive (BA-10L / BA-11B, 9 g / chuck). Spliced. The dimensional change rate per 1% moisture content change of the said MDF was 0.05%. In addition, a chuck angle represents the area of the plane represented by 303 mm x 303 mm (it is the same below).

(2) On the back side of MDF, the moisture proof film was bonded using the Chuori Kagyo adhesive (BA-10L / BA-11B, 9 g / chuck). The laminated body in this state is called a makeup plate.

(3) The decorative plate was cut into a size of 313 mm long x 1840 mm wide by a gang saw.

(4) Moreover, the tenon processing machine performed silver-head processing, edge chamfering processing, and V groove processing (V groove processing width is 1.5 mm width).

(5) Moreover, the coating material was apply | coated (paint: the coating material containing two-component hardening type urethane resin) to a silver process part, an edge chamfer part, and a V groove process part in the coating line.

The flooring cosmetic material was produced through the above process.

The production of the moisture proof film was as follows. That is, the biaxially stretched polyethylene terephthalate film of 12 micrometers thickness was prepared, and the primer layer which consists of two-component curable urethane-type resin was formed in the single side | surface. An aluminum vapor deposition layer was further formed on the primer layer. The film obtained by this is called a "deposited PET film."

0.2 g / m <2> (dry state) was formed for the surface coating layer which consists of PVA / silicate type | system | group on the said vapor deposition PET film, and the laminated body (synthetic resin base material layer (PET) / vapor deposition layer / surface coating layer) was produced. After both sides of the laminate were subjected to corona discharge treatment, a two-component curable resin in which a curing agent (isocyanate) was added to the main body (a mixture of a urethane resin and a vaginal surface-based resin) was used as a solid by gravure printing, respectively. It applied at the coating amount, and the primer layer for adhesion was formed on both surfaces. This obtained the moisture proof film (moisture permeability 1g / m <2> * 24 hours).

Example 2

A flooring decorative material was produced in the same manner as in Example 1 except that a 9 mm-thick particle board (the dimensional change rate per 1% moisture content change was 0.049%) as the wood substrate.

Example 3

A flooring decorative material was produced in the same manner as in Example 1, except that 12 mm thick softwood plywood (radiata pine, dimensional change rate per 1% moisture content change was 0.026%) as the wood substrate.

Example 4

A flooring decorative material was produced in the same manner as in Example 1 except that PE (polyethylene sheet. Moisture permeability: 7 g / m 2 · 24 hours) was used as the moisture proof film.

Comparative Example 1

Except not using a moisture proof film, it carried out similarly to Example 1, and produced the flooring decorative material.

Comparative Example 2

Except not using a moisture proof film, it carried out similarly to Example 2, and produced the flooring decorative material.

Comparative Example 3

Except not using a moisture proof film, it carried out similarly to Example 3, and produced the flooring decorative material.

Comparative Example 4

A flooring decorative material was produced in the same manner as in Example 1 except that a moisture proof paper (polyethylene was used as the core layer and both surfaces thereof were laminated with paper. A moisture permeability of 10 g / m 2 · 24 hours) was used as the moisture proof film.

Conventional Example 1

A flooring decorative material was produced in the same manner as in Example 1, except that a 12 mm-thick uncoated plywood (the dimensional change rate per 1% moisture content change was 0.016%) as a wood base material, and no moisture proof film was used.

Test Example 1 (Bending and warping in an atmosphere of 40 ° C)

The flooring cosmetics produced in Examples 1-4, Comparative Examples 1-4, and Conventional Example 1 were left to stand (7 days) in 40 degreeC atmosphere (dry atmosphere), and the curvature amount and the amount of distortion of the floor cosmetics were measured.

The schematic diagram of a curvature amount and a distortion amount is shown in FIG. The amount of warpage and the amount of warpage were measured with a gap gauge. A deflection amount of 20 mm / 1840 mm (a deflection amount with respect to the horizontal length) or less is a pass (suitable for practical use). In addition, the amount of distortion 0.3mm / 1840mm (the amount of distortion with respect to a horizontal length) or less is a pass (it is suitable for practical use). The results are shown in Table 1.

Test Example 2 (Bending and warping in a 40 ° C. and 90% RH atmosphere)

The flooring cosmetics produced in the Example and the comparative example were left to stand in 40 degreeC and 90% RH atmosphere (7 days), and the curvature amount and the amount of distortion of the floor cosmetics were measured similarly to Test Example 1. The results are shown in Table 1.

As apparent from the results of Table 1 above, the flooring decorative material of the present invention provided with a moisture-proof film having a moisture permeability of 7 g / m 2 · 24 hours or less effectively suppresses the dimensional change due to the humidity of the wood base material depending on the presence of the moisture-proof film. It is. As a result, the warpage and distortion of the flooring decorative material are prevented, and the result is closer to the test result of the conventional example 1 (use of king king plywood).

Example 5

(1) A 12 mm thick particle board using a floor make-up sheet (0.16 mm thick, moisture permeability: 3 g / m 2 and 24 hours) using a high grade adhesive (BA-10L / BA-11B, 9 g / chuck). It bonded to the surface of PB) (wooden base material). The dimensional change rate per 1% moisture content change of the said PB was 0.045%, and the average moisture content was 6.5 weight%.

(2) The moisture-proof film (PET film + vapor deposition layer, water vapor transmission rate: 3 g / m <2> * 24 hours) was bonded to the back of PB using the Chuori Kagyo adhesive agent (BA-10L / BA-11B, 9 g / chuck). . The laminated body in this state is called a makeup plate.

(3) The decorative plate was cut into a size of 313 mm long x 1840 mm wide by a gang saw.

(4) Moreover, the tenon processing machine performed silver-head processing, edge chamfering processing, and V groove processing (V groove processing width is 1.5 mm width).

(5) Moreover, the coating material was apply | coated (paint: the coating material containing two-component hardening type urethane resin) to a silver process part, an edge chamfer part, and a V groove process part in the coating line.

The flooring cosmetic material was produced through the above process. In addition, between each process, the decorative plate was surrounded by a PP film (30 micrometers in thickness, moisture permeability 15g), and was moisture-proof.

Example 6

The flooring decorative material was produced like Example 5 except not having carried out the moisture proof process using a PP film between each process. This made the moisture content of the peripheral part of a wood base material higher than a center part.

Example 7

The flooring decorative material was produced like Example 5 except having used the PB base material whose water content of the center part of a wood base material is 2% higher than a peripheral part.

Example 8

A flooring decorative material was produced in the same manner as in Example 5 except that the water content of the central part of the wood substrate was 1.7% higher than that of the peripheral part.

Comparative Example 5

A flooring decorative material was produced in the same manner as in Example 6 except that PB having an average water content of 5.5% was used as the wood base material.

Comparative Example 6

A flooring decorative material was produced in the same manner as in Example 6 except that the product was left to stand for one week without the moisture proofing treatment after the tenor processing.

Comparative Example 7

The flooring decorative material was produced like Example 5 except having used the PB base material whose water content of a wood center part is 2.5% higher than a peripheral part.

Comparative Example 8

The average moisture content was adjusted to 10.5%, and the floor cosmetic material was produced like Example 5 except having used the PB base material whose water content of a wood center part is 1.3% lower than a peripheral part.

Test Example 3 (Evaluation of warpage and construction aptitude after cut of flooring cosmetics)

<Evaluation of distortion after cut>

The floor decorative material (313 mm x 1840 mm) produced by Examples 5-8 and Comparative Examples 5-8 was cut into about half (150 mm x 1840 mm) in the center part.

The cut floorings were measured using the straight normal and the schema gauge to measure the amount of warpage in the horizontal direction. The measurement was performed within 30 minutes after the cut. The amount of distortion made the state where each silver side (mercury nib, dark silver nib) become convex.

In addition, the amount of distortion after cutting is permissible as long as it is the range of "-1.0mm / width 1840mm-+ 0.7mm / width 1840mm".

<Construction Aptitude Evaluation>

The flooring decorative material (313 mm in length x 1840 mm in width) produced in Examples 5-8 and Comparative Examples 5-8 was first constructed by the same size. Thereafter, the flooring decorative material cut to about half (150 mm in length × 1840 mm in width) from the center was constructed within 30 minutes after cutting, and the construction aptitude after cutting was evaluated. Evaluation criteria were as follows.

(Circle): It can construct without a problem like a cut before, and a gap is not confirmed by a joint.

(Triangle | delta): When it takes time, it can be constructed anyway and a clearance gap is not confirmed by a joint.

X: The construction is difficult, and a gap exceeding 0.3 mm is confirmed in the joint.

Test example 4 (floor heating system test)

The flooring decorative material (313 mm in length x 1840 mm in width) produced in Examples 5-8 and Comparative Examples 5-8 was used for the floor heating system test. Underfloor heating systems are generally not installed in the corner part (by the wall or around the column) but in the center of the room except the corner part. Therefore, in the test example 4, the floor heating system test was done about the floor decorative material (313 mm x side 1840 mm).

Specifically, a test piece was prepared by silver-assembly of the floor cosmetic material, and the floor heating system test shown in Fig. 4 (treated material, base material "II. Durable heat resistance test" 80 ° C hot water x 1100 hours continuous hot water Passed, provided by the gas company unified standards scheme).

About the test piece after the test,

(1) Passed if the gap displacement of the silver assembly part (fitting part) is 0.5 mm or less

(2) Passed if the step displacement of the silver assembly part (fitting part) is 0.5 mm or less

(3) If the amount of warpage (= width warp) in the horizontal direction (1840mm) is less than 1mm, pass

The evaluation was carried out according to the criteria. All made it pass that it was ○, and made the thing which has a requirement which is not satisfied at all to x.

Each evaluation and test result is shown in Table 2 below.

As apparent from the results of Table 2 above, the cut was particularly made by using a wood substrate having an average water content of 6 to 10% by weight and a water content of the central portion in the range of -1% to + 2% compared to the water content of the peripheral portion. Post distortion can be effectively suppressed. In addition, the moisture-permeable film of the moisture-proof film of 7 g / m <2> * 24 hours or less can be used for the flooring decorative material of this invention practically as a flooring material for floor heating.

1: makeup sheet
2: adhesive layer
3: wood base material (Nawang substitute material)
4: adhesive layer
5: moisture proof film

Claims (9)

A makeup sheet is laminated on the surface of the wood substrate, and a moisture-proof film is laminated on the back surface of the wood substrate,
(1) The said wood base material has a dimension change amount per 1% moisture content change larger than 0.02%,
(2) The moisture-proof film has a moisture permeability of 7 g / m 2 · 24 hours or less, the flooring makeup material. A makeup sheet is laminated on the surface of the wood substrate, and a moisture-proof film is laminated on the back surface of the wood substrate,
(1) The said wood base material has a dimension change amount per 1% moisture content change larger than 0.02%,
(2) The moisture-proof film has moisture permeability of 7 g / m 2 · 24 hours or less,
(3) The wood base material has an average water content of 6 to 10% by weight, and the water content of the central part is in the range of -1% to + 2% compared to the water content of the peripheral part. The wood substrate according to claim 1 or 2, wherein the wood substrate is selected from the group consisting of medium density wood fiber board (MDF), high density wood fiber board (HDF), particle board (PB), softwood plywood and composition water plywood. At least one floor makeup material. The said moisture proof film is a floor decorative material of Claim 1 or 2 which has a synthetic resin base material layer and a vapor deposition layer at least. The said moisture proof film is a floor decorative material of Claim 4 which has a primer layer between the said synthetic resin base material layer and the said vapor deposition layer. The said moisture proof film is a floor decorative material of Claim 4 which consists of the said synthetic resin base material layer / primer layer / the said vapor deposition layer / surface coating layer. The flooring decorative material of Claim 4 which further has a primer layer in the single side | surface or both surfaces of the said moisture proof film. The flooring decorative material of Claim 1 or 2 in which the said makeup sheet and the said moisture proof film are laminated | stacked on the said wooden base material with an adhesive agent. Floor decorative material of Claim 1 or 2 which is flooring for floor heating.

Images