KR20090033061A - Decorative material for floor - Google Patents

Abstract

A decorative floor material is provided to improve step feeling by dispersing the load effectively and lessening the burden on feet. A decorative floor material comprises a base of wood material and decorative sheets which are laminated on the base. The surface hardness is less than 60 when measured from the decorative sheet side by a D type durometer according to the JIS K 6253 standard. The decorative sheet is a laminate in which a pattern layer, a transparent adhesive layer, a transparent resin layer, and a transparent surface protective layer are laminated in sequence on a resin sheet.

Description

Floor cosmetics {DECORATIVE MATERIAL FOR FLOOR}

The present invention relates to a floor decorative material.

Conventionally, as flooring materials such as single-family homes and apartments, apartments are sliced of natural wood with a thickness of several hundreds of micrometers to several millimeters on a wooden base material such as lauan plywood having a thickness of about 6 to 15 mm, that is, Bonding a stone plate and coating the surface of the stone plate are widely used. As the flooring material coated on such natural wood is repeatedly painted, polished, and painted, a smooth finish with a sense of depth can be obtained, and a beautiful design with a very paint feeling can be obtained.

However, today, it is difficult to stably mass-produce flooring using natural wood in view of the lack of wood resources worldwide.

In view of these problems, for example, a flooring material in which a cosmetic sheet having an appearance close to natural wood by printing wood grain or the like is laminated on a wooden substrate is proposed. The flooring can be mass produced stably.

However, the flooring material has insufficient caster-proof nature. In order to solve such a cast-resistance problem, the flooring which provided the hard-sheet layer whose surface hardness is 60 or more in a durometer hardness test type D (JIS K 6253) between a wooden base material and a makeup sheet is proposed (patent document 1). .

However, the flooring material of patent document 1 is inferior to damage resistance and impact resistance. In addition, there is a lack of cushioning properties and poor walking.

Therefore, in addition to the cast resistance, there is a desire for the development of a flooring cosmetic material capable of stably mass production with excellent damage resistance, impact resistance and walking comfort.

[Patent Document 1] Japanese Patent Application Publication No. 2003-11277

The main object of the present invention is to provide a flooring cosmetic material that is excellent in damage resistance, impact resistance and walking comfort, and stably mass-produced, in addition to cast resistance.

MEANS TO SOLVE THE PROBLEM As a result of earnestly researching, this inventor is a floor cosmetic material laminated | stacked a makeup sheet on a wooden base material, and can achieve the said objective by setting the surface hardness of the floor cosmetic material measured from the makeup sheet side to a specific range. It has been found that the present invention has been completed.

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

1. A flooring decorative material formed by laminating a makeup sheet on a wooden base material, and having a surface hardness of less than 60 when measured from the side of the makeup sheet using a durometer of type D in accordance with JIS K 6253. Cosmetics.

2. The flooring decorative material according to item 1 above, having an intermediate layer having a surface hardness of less than 60 when measured using a durometer of type D between the wood substrate and the makeup sheet in accordance with JIS K 6253.

3. Floor decorative material of Claim 2 whose said intermediate | middle layer is a polyethylene resin layer.

4. Floor decorative material in any one of said claim | item 1-3 whose said makeup sheet is a laminated body formed by laminating | stacking a pattern shape layer, a transparent adhesive bond layer, a transparent resin layer, and a transparent surface protection layer on a resin sheet one by one. .

5. The flooring decorative material according to item 4, wherein the intermediate layer is a polyethylene resin layer and the resin sheet is a polyethylene sheet.

6. The flooring decorative material according to item 4 or 5, wherein the transparent surface protective layer is an ionizing radiation curable resin resin crosslinked and cured.

The floor cosmetic material of the present invention is a floor cosmetic material obtained by laminating a makeup sheet on a wooden base material, and the surface hardness of the floor cosmetic material measured from the makeup sheet side using a durometer of type D in accordance with JIS K 6253 Less than 60.

Surface Hardness of Floor Cosmetics

Surface hardness in the case of using the type D durometer in accordance with the provisions of JIS K 6253 in the flooring decorative material of the present invention is less than 60, preferably 25 to 59, more preferably 45 to 59 to be.

By making the said surface hardness into less than 60, the floor cosmetic material excellent in the walking feeling can be obtained. In addition, damage resistance and impact resistance of the flooring decorative material can be improved.

In addition, in this specification, "excellent walking feeling" means having cushioning property which is excellent in the dispersibility of a load, and can fully reduce the burden to a sole.

The flooring decorative material of the present invention is also excellent in cast resistance. In particular, by setting the surface hardness to 45 or more, caster resistance can be appropriately imparted to the floor decorative material.

The measurement of the surface hardness is performed in accordance with the provisions of JIS K 6253 using a durometer of type D. Specifically, the surface hardness is determined by pressing the tackometer and the pressurization surface of the type D durometer toward the makeup sheet side of the flooring cosmetic material, and measuring the amount of the squeezing movement when the squeezer penetrates the cosmetic material.

The surface hardness of the flooring decorative material can be adjusted to the said range by setting suitably the kind of resin to be used, laminated constitution, etc. In particular, as the floor decorative material of the present invention having the surface hardness, a sheet having a surface hardness of less than 60 when measured using a durometer of type D between the wood substrate and the makeup sheet in accordance with the provisions of JIS K 6253. (The following may be abbreviated as "middle layer".) The flooring decorative material is mentioned as a preferable aspect.

Mezzanine

The flooring cosmetic material of the present invention has a surface hardness of less than 60, preferably 25 to 59, more preferably measured using a durometer of type D between the wood substrate and the makeup sheet in accordance with JIS K 6253. Preferably it has an intermediate layer which is 45 to 59. Surface hardness can be measured by laminating an intermediate layer on a wood substrate.

In the formation of the intermediate layer, for example, polyethylene (low density polyethylene, linear low density polyethylene, high density polyethylene), polypropylene, polybutene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-pro Polyolefin resin, such as a propylene-butene copolymer, can be used. These can be used individually by 1 type or in combination of 2 or more types. In particular, it is preferable to use polyethylene as the resin. When polyethylene is used, the fluff of the processed surface of an intermediate | middle layer can be suppressed at the time of grooving or chamfering the decorative material for floors.

When using the said polyolefin resin, you may add the various elastomer represented by polyolefin thermoplastic elastomer further as needed. By adding the elastomer, the surface hardness of the intermediate layer can be appropriately adjusted.

Moreover, in addition to the said polyolefin resin, polyester-based resin (for example, amorphous polyethylene terephthalate, amorphous PET copolymer, polybutylene terephthalate, etc.), polymethyl methacrylate, polystyrene, polycarbonate, acrylonitrile Butadiene-styrene resin (ABS) etc. can also be used.

The amorphous PET copolymer is a resin obtained by copolymerizing terephthalic acid and 1,4-cyclohexanedimethanol. As a commercial item, the brand name "PET-G" (made by Eastman Corporation) is mentioned, for example.

When using resins other than the above-mentioned polyolefin resin, you may add a well-known additive as needed, or may adjust the ratio of the monomer component in the said resin.

For example, the intermediate layer can be produced by molding a resin composition containing the polyolefin resin or the like into a sheet form (film shape) by, for example, a calender method, an inflation method, a T die extrusion method, or the like. have.

50-500 micrometers is preferable and, as for the thickness of an intermediate | middle layer, 200-400 micrometers is more preferable.

Wood materials

The wooden base material is not limited as long as it is suitable as a base material of the floor decorative material. For example, a single board, a plywood, a particle board etc. which consist of trees, such as a cedar, a cypress, a pine, a king, teak, etc. are mentioned. Moreover, the wood base material which combines these two or more can also be used. In particular, the wood substrate used for the floor decorative material of the present invention is preferably a plywood using a king king from the viewpoint that the surface hardness of the above-mentioned floor hardness can be appropriately produced.

Although the shape of a wooden base material is not specifically limited, Usually, it is set as a cube or a cube. Although the thickness of a wooden board is not limited, about 3-15 mm is preferable, and about 6-12 mm is more preferable. In addition, the wood substrate may be subjected to tongue and groove working on the side surface.

Cremation sheet

The floor decorative material of the present invention is obtained by attaching a makeup sheet on the wood substrate (or the intermediate layer).

The laminated body which forms the pattern-shaped layer, the transparent adhesive bond layer, the transparent resin layer, and the transparent surface protection layer in order on the said resin sheet is mentioned, for example.

Hereinafter, the said decorative sheet is demonstrated concretely using the said laminated body as a representative example.

(Resin sheet)

It is preferable to use the sheet (film) which consists of polyolefin resin as a resin sheet.

Polyolefin resin is not specifically limited, What is normally used in the field of a cosmetic sheet can be used. For example, polyethylene, polypropylene, polybutene, polymethylpentene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-propylene-butene copolymer, polyolefin thermoplastic elastomer, etc. are mentioned. Can be. Among these, polypropylene, polyolefin thermoplastic elastomer, and the like are particularly preferable. In addition, when an intermediate | middle layer is a polyethylene resin layer, it is preferable to use polyethylene also for a resin sheet. By forming both of an intermediate | middle layer and a resin sheet from polyethylene, damage resistance improves by a synergistic effect, and since the resin component is the same, both layers can be easily adhere | attached by thermal lamination.

A resin sheet can be produced by shape | molding the said polyolefin resin in sheet form (film shape) by the calender method, the inflation method, the T die extrusion method, etc., for example.

As necessary, the resin sheet may contain a known additive such as an inorganic filler.

Although the thickness of a resin sheet is not specifically limited and can be set according to a product characteristic, Usually, it is 40-150 micrometers, Preferably it is about 50-100 micrometers.

You may surface-treat a corona discharge process etc. to one side or both sides of a resin sheet as needed. For example, when performing a corona discharge process, what is necessary is just to make surface tension of the surface of a resin sheet 30 dyne or more, Preferably it is 40 dyne or more. What is necessary is just to surface-treat according to the normal method of each process.

The back surface primer layer for facilitating adhesion of the said base material may be provided in the resin sheet back surface (the said wood substrate (or the said intermediate | middle layer) adhesion surface). Moreover, you may provide the printing primer layer in order to make formation of a patterned layer easy on the upper surface (opposite surface of the said wood substrate (or the said intermediate | middle layer) adhesion surface) of a resin sheet.

The said back primer layer and the primer layer for printing can be formed by apply | coating a well-known primer agent to one side or both sides of a resin sheet. As a primer, what disperse | distributed the resin component to the solvent can be used. Examples of the resin component include acrylic urethane resins and urethane cellulose resins (for example, resins obtained by adding hexamethylene diisocyanate to a mixture of urethane and nitrocellulose).

Although the application amount of a primer agent is not specifically limited, Usually, it is 0.1-100 g / m <2>, Preferably it is about 0.1-50 g / m <2>.

Although the thickness after drying of the said back surface primer layer and the printing primer layer is not specifically limited, Usually, they are 0.01-10 micrometers normally, Preferably they are about 0.1-1 micrometer.

(Pattern design layer)

The patterned layer is formed on the resin sheet [the surface opposite to the said wood base material (or the said intermediate | middle layer) adhesion surface, and shows the same side in each layer below).

The patterned layer imparts designability to the makeup sheet by a desired pattern, and the type of the pattern is not particularly limited. For example, wood grain, stone grain, sand grain, tile attachment form, brick stack form, texture of fabric, leather pattern, geometric figure, letter, symbol, abstract form, etc. are mentioned.

The formation method of a pattern-shaped layer is not specifically limited, For example, coloring ink, a coating agent, etc. which can be obtained by dissolving (or dispersing) a well-known coloring agent (dye or pigment) with a binder resin in a solvent (or a dispersion medium). What is necessary is just to form by the printing method used.

As a coloring agent, For example, inorganic pigments, such as carbon black, titanium bag, zinc-ized, bengalah, blue blue, cadmium red, such as: azo pigment, lake pigment, anthraquinone pigment, quinacridone pigment, phthalocyanine pigment, isoindrinone pigment, di Organic pigments such as oxadine pigments; Metal powder pigments such as aluminum powder and bronze powder; Pearlescent pigments such as titanium oxide coated mica and bismuth oxide chloride; Fluorescent pigments; Luminous pigments and the like. These coloring agents can be used individually or in mixture of 2 or more types. You may mix | blend fillers, such as a silica, and extender pigments, such as organic beads, a neutralizing agent, surfactant, etc. with these coloring agents.

Examples of the binder resin include acrylic resins, styrene resins, polyester resins, urethane resins, acrylic urethane resins, chlorinated polyolefin resins, vinyl chloride-vinyl acetate copolymer resins, polyvinyl butyral resins, and alkyd resins. Resin, petroleum resin, ketone resin, epoxy resin, melamine resin, fluorine resin, silicone resin, cellulose derivative, rubber resin and the like. These resin can be used individually or in mixture of 2 or more types.

As a solvent (or a dispersion medium), For example, petroleum organic solvents, such as hexane, heptane, octane, toluene, xylene, ethylbenzene, cyclohexane, methylcyclohexane; Ester organic solvents such as ethyl acetate, butyl acetate, 2-methoxyethyl acetate, and 2-ethoxyethyl acetate; Alcohol-based organic solvents such as methyl alcohol, ethyl alcohol, normal propyl alcohol, isopropyl alcohol, isobutyl alcohol, ethylene glycol and propylene glycol; Ketone organic solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone; Ether organic solvents such as diethyl ether, dioxane and tetrahydrofuran; Chlorine organic solvents such as dichloromethane, carbon tetrachloride, trichloroethylene and tetrachloroethylene; Inorganic solvents, such as water, etc. are mentioned. These solvents (or dispersion medium) are used individually or in mixture of 2 or more types.

As a printing method used for formation of a patterned layer, the gravure printing method, the offset printing method, the screen printing method, the flexographic printing method, the electrostatic printing method, the inkjet printing method, etc. are mentioned, for example. In addition, when forming the pattern shape layer of a front-beta, for example, the roll coat method, the knife coat method, the air knife coat method, the die coat method, the lip coat method, the comma coat method, the kiss coat method, the flow coat method, Various coating methods, such as the dip coat method, are mentioned. In addition, a hand drawing method, a marbling method, a photographing method, a transfer method, a laser beam drawing method, an electron beam drawing method, a partial deposition method such as metal, an etching method, or the like may be used, or may be used in combination with other forming methods. good.

Although the thickness of a patterned layer is not specifically limited, Although it can set suitably according to a product characteristic, the layer thickness at the time of coating is about 1-15 micrometers, and the layer thickness after drying is about 0.1-10 micrometers.

(Colored concealment layer)

You may further form a colored hiding layer between a resin sheet and a patterned layer as needed. The colored hiding layer is provided when the background color of the adherend is to be concealed from the surface of the decorative sheet. As well as the case where the said resin sheet is transparency, even when the said resin sheet is concealed colored, you may form in order to stabilize concealment.

As the ink for forming the colored concealment layer, an ink for forming a patterned layer may be used for concealed coloring.

As for the formation method of a colored concealment layer, the method which can form so that the whole resin sheet may be coat | covered (front-beta form) is preferable. For example, the roll coat method, the knife coat method, the air knife coat method, the die coat method, the lip coat method, the comma coat method, the kiss coat method, the flow coat method, the dip coat method, etc. mentioned above are mentioned as a preferable thing.

Although the thickness of a colored hiding layer is not specifically limited, Although it can set suitably according to a product characteristic, the layer thickness at the time of coating is about 0.2-10 micrometers, and the layer thickness after drying is about 0.1-5 micrometers.

(Transparent adhesive layer)

The transparent adhesive layer is formed on the patterned layer. The transparent adhesive layer is not particularly limited as long as it is transparent, and includes all of colorless transparent, colored transparent, translucent and the like. This adhesive bond layer is formed in order to adhere | attach a pattern-shaped layer and a transparency resin layer.

An adhesive is not specifically limited, A well-known adhesive agent can be used in the field of a cosmetic sheet.

As a well-known adhesive agent in the field of a cosmetic sheet, curable resin, such as thermoplastic resins, such as a polyamide resin, an acrylic resin, and a vinyl acetate resin, a thermosetting urethane resin, etc. are mentioned, for example. Moreover, the two-component curable polyurethane resin or polyester resin which uses an isocyanate as a hardening | curing agent is also applicable.

For example, an adhesive bond layer can be formed by coating and drying an adhesive agent on a patterned layer, and drying and hardening. Conditions, such as drying temperature and drying time, are not specifically limited, What is necessary is just to set suitably according to the kind of adhesive agent. The application method of an adhesive agent is not specifically limited, For example, a roll coat, a curtain flow coat, a wire bar coat, a reverse coat, a gravure coat, a gravure reverse coat, an air knife coat, a kiss coat, a blade coat, a smooth coat, a comma coat, etc. The method of can be adopted.

Although the thickness of an adhesive bond layer is not specifically limited, The thickness after drying is 0.1-30 micrometers, Preferably it is about 1-20 micrometers.

(Transparent resin layer)

The transparent resin layer is formed on the transparent adhesive bond layer. As long as it is transparent, a transparency resin layer contains all of colorless transparent, colored transparent, translucent, etc.

Although the resin component contained in a transparency resin layer is not limited, It is preferable if it is a thermoplastic resin, Especially polypropylene is preferable.

The transparency resin layer can be made to contain additives, such as an inorganic filler, as needed.

For example, the resin is formed of a transparent resin layer by a calender method, an inflation method, a T die extrusion method, or the like. You may also use a ready-made film.

What is necessary is just to have the thickness of a transparency resin layer about 20-300 micrometers normally.

The surface which is the surface of a transparency resin layer and forms a transparent surface protection layer mentioned later may surface-treat corona discharge treatment, ozone treatment, plasma treatment, ionizing radiation treatment, dichromic acid treatment, etc. as needed. What is necessary is just to surface-treat according to the normal method of each process.

Moreover, you may provide a primer layer (primer layer for making surface protective layer easy to form) on the surface as needed.

A primer layer can be formed by apply | coating a well-known primer agent to the surface of a transparent resin layer. Examples of the primer include a urethane resin primer composed of an acrylic modified urethane resin and the like, a resin primer composed of a block copolymer of acryl and urethane, and the like.

Although the application amount of a primer agent is not specifically limited, Usually, it is 0.1-100 g / m <2>, Preferably it is about 0.1-50 g / m <2>.

Although the thickness of a primer layer is not specifically limited, Usually, it is 0.01-10 micrometers, Preferably it is about 0.1-1 micrometer.

(Transparent surface protective layer)

The transparency surface protection layer is formed on the transparency resin layer.

As for a transparency surface protection layer, ionizing radiation curable resin crosslinks resin, and the hardened ionizing radiation curable resin layer is preferable from a viewpoint of high surface hardness, productivity, etc.

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 of the prepolymers, oligomers, and monomers which have a polymerizable unsaturated bond or an epoxy group crosslinkable by irradiation with ionizing radiation in a molecule can be used. For example, acrylate resins, such as urethane acrylate, polyester acrylate, and epoxy acrylate; Silicon resins such as siloxane; Polyester resin; 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, are mentioned. As a wavelength of an ultraviolet-ray, the wavelength range about 190-380 nm can be used.

As an electron beam source, various electron beam accelerators, such as a cockcroft Walton type | mold, a van degraf type | mold, a resonance transformer type | mold, an insulation core transformer type | mold, a linear type, a dynamiteron type, and a high frequency type | mold, are mentioned, for example. The energy of the electron beam is preferably about 100 to 1000 keV, and more preferably about 100 to 300 keV. As for the irradiation amount of an electron beam, about 2-15 Mrad is preferable.

Although the ionizing radiation curable resin is sufficiently cured when irradiated with an electron beam, it is preferable to add a photopolymerization initiator (sensitizer) when irradiating with ultraviolet rays to cure it.

As a photoinitiator in the case of resin system which has a radical polymerizable unsaturated group, for example, acetphenone, benzophenone, thioxanthone, benzoin, benzoin methyl ether, mihirabenzoyl benzoate, mihiraketone, diphenyl sulfide At least one of dibenzyl disulfide, diethyl oxide, triphenylbiimidazole, isopropyl-N, N-dimethylaminobenzoate and the like can be used. In addition, in the case of the 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, a benzoin sulfonic acid ester, a prilloxy sulfonium diaryl iodide 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.

The method of forming a protective layer from an ionizing radiation curable resin is, for example, applying a solution of the ionizing radiation curable resin by a coating method such as a gravure coating method or a roll coating method. The application amount of the solution is usually 5 to 30 µm, preferably about 15 to 25 µm, as a solid content.

It is preferable that the said transparent surface protection layer contains a friction agent.

Examples of the friction agent include alumina, diamond, silicon carbide, silica, glass, zirconia, zeolite, shiras balloon, diatomaceous earth, and the like. These can be used individually or in combination of 2 or more types. It is preferable that the said friction agent is a granule whose average particle diameter is about 5-50 micrometers. By adjusting the average particle diameter of the said friction agent and the film thickness of the said transparent surface protection layer suitably, all or one part of the said friction agent may protrude above the surface of the said transparent surface protection layer, and it will be fine convex on the surface of the said transparent surface protection layer. The shape can be formed. By forming such a fine convex part, surface hardness, abrasion resistance, abrasion resistance, slip resistance (slip resistance), etc. can be suitably given to a flooring cosmetic material.

However, when the friction agent is exposed in the state protruding from the surface of the transparent surface protection layer, there is a fear that the back surface of the pedestrian's socks is worn or the knees may be close when the child falls. Thus, the uppermost layer without the friction agent is formed so as to form the transparent surface protective layer composed of a plurality of layers, to add a friction agent to a layer other than the uppermost layer, and to cover the surface of the friction agent that protrudes from the average surface of the layer. It is desirable to provide. In this case, the sharp surface irregularities formed by the fine convex portions due to the protrusion of the friction agent from the average surface of the transparent surface protective layer are slowed down by the surface protective layer of the uppermost layer. As a result, in addition to the reduction of the abrasion of the above-mentioned contact, it is possible to reduce the haze when contacting the surface, the visual excessive gloss loss (like powder), and the like.

The addition amount of the said friction agent is about 1-80 weight part with respect to 100 weight part of resin components.

Although the thickness of a transparent surface protection layer is not specifically limited, About 1-15 micrometers is preferable.

Although the thickness of the said makeup sheet is not specifically limited, About 100-200 micrometers is preferable.

Floor Cosmetic

The floor cosmetic material of this invention forms the said makeup sheet on the said wooden base material.

In the method for forming the makeup sheet on the wood substrate or on a sheet having a surface hardness of less than 60, for example, an adhesive is coated on the substrate or sheet, and the makeup sheet is loaded on the coated surface side, and the makeup sheet side is removed from the makeup sheet side. The method of laminating both by applying pressure with a roll is preferable. As said adhesive agent, well-known adhesive agents, such as a urethane modified ethylene vinyl acetate emulsion adhesive agent, can be used, for example.

It is preferable to laminate the moisture-proof sheet | seat with a water vapor transmission rate of 3-30 g / m <2> * 24h on the back surface (opposite side to a cosmetic sheet) of the said wood base material of the floor decorative material of this invention. By attaching the moisture proof sheet to the back surface of the wood base material, more excellent moisture resistance can be imparted to the floor decorative material.

The moisture proof sheet is not particularly limited as long as the moisture permeability is 3 to 30 g / m 2 · 24h. For example, the sheet etc. which mainly have a moisture-proof resin layer with a thickness of about 10-100 micrometers, and laminate | stack a ground layer on the surface and / or back surface as needed.

As said moisture proof resin layer, hydrophobic thermoplastic resins with low moisture permeability, such as polyolefin resin, such as polyethylene (high density polyethylene, low density polyethylene), polyvinyl chloride resin, a polyester resin, polyvinylidene fluoride resin, are used suitably, for example. Can be.

As said strata, thin paper, resin impregnated paper, interstitial reinforced paper, etc. are mentioned, for example.

As needed, for example, amino compounds such as dicyandiamide and melamine, urea, amides such as valbaric acid and semicarbazide hydrochloride, amino acids such as glutamic acid, glycine, and alanine, hydrazobenzene, It is preferable to contain the formaldehyde trapping agent represented by nitrogen containing compounds, such as hydrazine derivatives, such as propionic acid hydrazide, carbohydrazide, and adipic acid dihydrazide. Thereby, the trapping-removal function of the formaldehyde which the said wood-based material diverges can be suitably given to the said floor decorative material.

In the floor makeup material of the present invention, four-side thread processing, V-shaped long grooves, or the like may be performed using a tenoner as necessary. Moreover, you may perform a wiping process after apply | coating paint. Although the said coating material is not specifically limited, The aqueous two-component curable urethane type coloring paint is preferable.

Floor decorative material of the present invention is excellent in walking feeling. Specifically, the flooring decorative material of the present invention is excellent in the dispersibility of the load and has a cushioning property that can sufficiently reduce the burden on the sole.

In addition, the floor decorative material of the present invention is excellent in cast resistance, damage resistance and impact resistance.

In addition, the flooring decorative material of the present invention can be stably mass produced.

An Example and a comparative example are shown to the following, and this invention is demonstrated to it further more concretely. However, this invention is not limited to an Example.

<First Embodiment>

(Production of the cosmetic sheet)

On the resin sheet which consists of a 60-micrometer-thick colored polyethylene film, acryl urethane-type resin (resin which adds 5 weight part of hexamethylene diisocyanate to 100 weight part of acrylic polyol) was melt | dissolved in the mixed solvent of methyl ethyl ketone and butyl acetate. The solution was coated by a gravure printing method so as to have a solid content of 2 g / m 2 to form a primer layer for printing.

On the printing primer layer, the 4 micrometers grain-shaped layer was formed by the gravure printing method which used the acrylic urethane-type resin (resin which adds 5 weight part of hexamethylene diisocyanate to 100 weight part of acrylic polyol) solution as printing ink. .

The solution of the urethane-cellulose resin was coated by the gravure printing method so that solid content might be 2 g / m <2> on the surface opposite the patterned layer of the said resin sheet, and the back surface primer layer was formed.

The urethane-cellulose resin is added by adding urethane and nitrocellulose in a mixed solvent of methyl ethyl ketone and methyl isobutyl ketone and adding 5 parts by weight of hexamethylene diisocyanate to 100 parts by weight of a mixture of urethane and nitrocellulose. A solution of was prepared.

On the patterned layer, the thermosetting urethane resin adhesive is coated so that the solid content is 8 g / m 2, and the polypropylene resin is heated and melt-extruded by a T die extruder, and the transparent adhesive layer having a thickness of 8 μm and a thickness of 80 μm are used. The transparent resin layer was formed.

The urethane acrylate type electron beam curable resin was coated and dried so that solid content might be 15 g / m <2> on the transparency resin layer, and the uncured electron beam curable resin layer was formed. Subsequently, under an oxygen concentration of 200 ppm, the uncured resin layer was irradiated with electron beams under conditions of an acceleration voltage of 125 KeV and 5 Mrad to cure the resin to form an electron beam curable resin layer (transparent surface protective layer) having a thickness of 15 μm. Formed.

By the above method, the decorative sheet | seat of thickness 160micrometer was produced.

(Middle floor)

The high density polyethylene was extrusion-molded using the T die extruder, and the transparent high density polyethylene sheet (middle layer) of thickness 400micrometer was obtained.

The surface hardness when the transparent high-density polyethylene sheet was attached on a 12 mm thick plywood plywood and measured using a durometer of type D in accordance with JIS K61253 was 55.

In addition, both surfaces of the obtained intermediate | middle layer were corona discharge-treated.

(Production of the makeup material for the floor)

The thermosetting urethane resin adhesive was coated on the back surface of the said makeup sheet so that solid content might be 8 g / m <2>, and the said intermediate | middle layer was laminated | stacked on it. On the said intermediate | middle layer (on the opposite surface of a cosmetic sheet), the solution of urethane-cellulose resin was coated by the gravure printing method so that solid content might be 2 g / m <2>, and the back primer layer was formed.

And the back primer layer of the said intermediate | middle layer was made to stick on the roughening plywood of thickness 12mm, and the flooring decorative material was produced. Urethane modified ethylene-vinyl acetate emulsion adhesive (9 g / chuck ² wet) was used for adhesion | attachment.

In accordance with the provisions of JIS K 6253, the surface hardness of the decorative material for floors was 52 when measured from the decorative sheet side using a durometer of Type D.

Second Embodiment

A flooring decorative material was produced in the same manner as in the first embodiment except that a colored polypropylene film having a thickness of 60 µm was used instead of the resin sheet.

Then, the surface strength of the floor decorative material was measured in the same manner as in the first embodiment. The surface hardness of the obtained floor decorative material was 59.

<First Comparative Example>

Instead of the intermediate layer, according to the provisions of JIS K 6253, a polycarbonate sheet having a thickness of 400 μm having a surface hardness of 78 when measured using a durometer of type D was produced, and the flooring decorative material was used using the sheet. A flooring decorative material was produced in the same manner as in the first embodiment except that was prepared.

Then, the surface strength of the flooring decorative material was measured in the same manner as in the first embodiment. The surface hardness of the obtained flooring decorative material was 75.

<Test Example 1 (Cast Resistance)>

The caster resistance of the flooring decorative material obtained in the 1st Example and the 2nd Example was evaluated using the caster test apparatus L6-04 (made by Asano Kikaisei Co., Ltd.). The evaluation order is as follows. That is, the flooring cosmetic material which was a test object was fixed to the sample holder. After the caster holder was loaded by the adjustment handle so that the three casters did not come into contact with the surface of the floor decorative material, the weight was loaded on the load table so as to weigh 70 kg. Next, an adjustment handle was used to apply a load on the three casters. The rotational speed was set at a speed of 20 rpm, half a revolution every 5 minutes, and 1000 revolutions, and after completion of 1000 revolutions, the caster holder was opened to open the caster floor for testing.

The depth of depression of the floor decorative material taken out was less than 100 micrometers. Therefore, the floor cosmetic material obtained in the 1st Example and 2nd Example can be used effectively in the place where caster resistance is calculated | required.

<Test Example 2 (damage resistance)>

Using a Hoffman scratch tester (manufactured by BYK-GARDNER), the load was 1000 g, and evaluated by scratching the surface of the floor cosmetic material obtained in the first, second and first comparative examples. "○" was evaluated as "there is almost no change in the surface", "△" "slight white damaged part was seen on the surface", and "x" was evaluated as "the white damaged part was conspicuous on the surface."

The evaluation results are shown in Table 1. Comparing the first example and the second example, the white damaged part occurred at a lower load in the second example.

<Test Example 3 (Impact Resistance)>

According to the DuPont impact test of JIS K5600, an impact type having a hemispherical tip having a radius of 6.3 mm on the surface of the flooring cosmetic material obtained in the first, second and first comparative examples was left standing. It evaluated by dropping the weight of 500g load from 30 cm in height on the said impact shape. "○" was evaluated as "there is almost no change in the surface", and "x" as "the crack generate | occur | produced in the surface."

The evaluation results are shown in Table 1.

<Test Example 4 (feeling of walking)>

The floor decorative material obtained in the first embodiment was placed on the floor surface such that the makeup sheet side was upward. The ease of walking (the burden of kicking, etc.) when walking on the above was evaluated. "○" was evaluated as "relatively fatigued" and "x" as "relatively fatigued". The same evaluation was performed also about the floor decorative material obtained by the 2nd Example and the 1st comparative example.

The evaluation results are shown in Table 1.

<5th test example (cutting property)>

About the flooring decorative material obtained by the 1st Example, the 2nd Example, and the comparative example, the groove | channel processing of the depth which reaches a low king plywood from the makeup sheet side was performed. The machined surface was observed to evaluate that "○" could hardly be identified as lint of the middle layer, and "x" could be "conspicuous that lint of the middle layer was significant."

The evaluation results are shown in Table 1.

Table 1

Damage resistance Impact resistance Walking Machinability First embodiment ○ ○ ○ ○ Second embodiment △ ○ ○ ○ Comparative Example 1 × × × ×

Claims (6)

A flooring decorative material formed by laminating a decorative sheet on a wooden base material, and having a surface hardness of less than 60 when measured from the side of the decorative sheet using a durometer of type D in accordance with the provisions of JIS K 6253. . The floor decorative material of Claim 1 which has an intermediate | middle layer whose surface hardness is less than 60 when measured using the durometer of a type D between the said wooden base material and the said makeup sheet in accordance with JIS K61253. The flooring decorative material according to claim 2, wherein the intermediate layer is a polyethylene resin layer. The flooring decorative material according to claim 1, wherein the makeup sheet is a laminate obtained by sequentially laminating a patterned layer, a transparent adhesive layer, a transparent resin layer, and a transparent surface protective layer on a resin sheet. The flooring decorative material according to claim 4, wherein the intermediate layer is a polyethylene resin layer and the resin sheet is a polyethylene sheet. The flooring decorative material according to claim 4, wherein the transparent surface protective layer is an ionizing radiation curable resin layer in which the ionizing radiation curable resin is crosslinked and cured.