JP2017145583A - Decorative material for flooring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent distasteful rubbing sound from being generated by walking without damaging anti-slip performance, while inhibiting a warp and the like from being generated.SOLUTION: A decorative material for flooring 10 includes a decorative sheet 1 on one face of a woody base material 11 and a moisture-proof film 20 on the other face. The woody base material 11 has a dimensional variation per 1% water content change that is larger than 0.02% and has an average water content that is 6 to 10 mass%. The moisture-proof film 20 has a moisture permeability that is equal to or lower than 7 g/m24 hr. On a surface on the decorative sheet 1's side are formed a plurality of salients 5. Each salient 5's height is within a range equal to or larger than 20 μm and equal to or smaller than 80 μm. A circle obtained by converting area of each salient 5 in a plan view to a circular shape has a diameter within a range equal to or larger than 40 μm and equal to or smaller than 200 μm. The plurality of salients 5 are randomly arranged so that a rate of area, per unit area in a plan view, occupied by the plurality of salients 5 is within a range equal to or larger than 0.05 and equal to or smaller than 0.5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a floor decorative material, and more particularly, to a floor decorative material in consideration of the warpage of the cosmetic material itself, anti-slip properties against pets such as dogs, and suppression of rubbing noise.

The flooring decorative material is configured, for example, by pasting a decorative sheet on a wooden base material. As the wooden base material, there is a wooden base material (for example, hardwood lauan plywood) obtained from a good quality raw wood, and it is possible to express a high-class feeling due to natural wood.
However, raw wood is difficult to obtain due to timber cutting restrictions, and there is a shortage of materials. This problem is particularly acute for hardwoods such as Lauan. Therefore, the development of a wood base material that can be used in place of the Lauan plywood is being promoted. Examples of the Lawan alternative material include softwood plywood, wood board obtained by molding and solidifying wood fibers or wood pieces separated from wood-based waste wood with an adhesive, and early-wood plywood made of early-wood.

However, these lauan substitute materials have a problem that the dimensional change amount per 1% moisture content change is larger than that of the lauan plywood, and the dimensional change is easy according to the change of the surrounding environment. Specifically, the amount of dimensional change per 1% moisture content of Lauan plywood is 0.015 to 0.02%, but about 0.045% for MDF and PB, and 0 for softwood plywood (for example, Radiata Pine). It is about 0.025%. For this reason, the Lawan alternative material has a characteristic that warp and bend (the right angle of the floor surface shifts) easily occur due to changes in humidity.
In order to improve the above problem, it has been proposed to laminate a moisture-proof film on the other surface of the Lawan alternative material (for example, Patent Documents 1 to 3). However, the moisture-proof films described in Patent Documents 1 to 3 have a moisture permeability of about 20 g / m ² · 24 hours at the most, and the performance is insufficient to prevent warping and bending of the Lawan alternative material. Particularly in recent years, a decorative sheet having a low moisture permeability (2 g / m ² · 24 hours or less) is often laminated on one side of the Lawan alternative material, so the moisture permeability of the other side is equal to or higher than that of one side. There is a need to reduce moisture permeability.

As described above, even when a lauan substitute material having a dimensional change amount per 1% moisture content change larger than 0.02% is used as a wooden base material and a decorative sheet having low moisture permeability is laminated on one surface thereof, the warp is warped. Development of a flooring material in which the occurrence of bending and curving is suppressed is desired.
In addition, flooring materials are often used on indoor or outdoor building floors in recent years. Most of the flooring is painted veneer, but it has a wood grain design and natural texture, but it requires surface performance such as scratch resistance, contamination resistance, and weather resistance for practical use. Therefore, recent flooring materials tend to be often used for flooring materials in which a decorative sheet is laminated on a wooden base material.

Here, the required quality for flooring includes those based on laws and regulations such as the Building Standards Act, those based on standards such as Eco Mark and JIS, etc., and practical weather resistance, scratch resistance, and contamination resistance. It is necessary to design the material according to various required qualities such as properties and to select the finish such as surface shape and gloss.
On the other hand, as well as satisfying the required performance in practical use, new demands for flooring materials have begun to emerge from the viewpoint of safety, comfort or environmental considerations due to the growing awareness of the living environment of users. One of them is slip resistance. This is measured, for example, according to JIS-A1454 “Polymer-based tension flooring test method”. S. R. It is expressed by a reference value of the difficulty of slipping assuming walking indicated by the value.

For floor sheets used outdoors, especially for stairs, balconies, and condominium corridors, various flooring materials with uneven surfaces have been put to practical use. As one of them, a non-slip floor material in which a raised printed pattern portion is formed on a substrate, and a point-shaped anti-skid small protrusion group made of a crosslinked resin is formed on the surface of the printed pattern portion by printing is integrally fixed. It has been known.
In addition, there is a demand for anti-slip flooring from another angle.For example, when keeping pets, especially dogs, indoors, slipping of the flooring prevents the pet from walking and causes abnormal bones and joints in the legs. There is a problem of being stressed.

In response to this, conventionally, a special anti-slip wax has been applied to the surface of the flooring, but it is costly and cumbersome to apply to the entire floor, and in addition, it must be reapplied regularly. There is a problem that must not be.
The problem of pets and flooring is not limited to that. Especially when dogs are raised indoors, it is considered that flooring and leg claw sounds and rubbing sounds can be heard as unpleasant sounds when walking dogs. There is also a case.

JP 2001-193267 A JP 2001-260109 A JP 2006-097321 A

  The present invention has been made in view of the above points, and a wooden base material having a dimensional change per 1% moisture content change larger than 0.02% is used as the wooden base material. An object of the present invention is to provide a floor decorative material that can suppress the generation of unpleasant rubbing noise associated with walking of a pet or the like while suppressing the occurrence of warping and curving, and without impairing the anti-slip performance.

In order to solve the problem, a floor decorative material according to one embodiment of the present invention is a floor in which a decorative sheet is provided on one surface of a wooden base material and a moisture-proof film is provided on the other surface of the wooden base material. The wood base material has a dimensional change amount per 1% moisture content change of more than 0.02% and an average moisture content of 6 to 10% by mass. The moisture permeability is 7 g / m ² · 24 hours or less, and a plurality of convex portions are formed on the decorative sheet side surface of the floor decorative material, and the height of the convex portions is 20 μm or more and 80 μm or less. Each of the convex portions in plan view has a circle diameter in a range of 40 μm or more and 200 μm or less when the area is converted into a circular shape, and the plurality of convex portions per unit area in plan view. The proportion of occupying 0.05 to 0.5 In enclosed, the plurality of protrusions, characterized in that it is arranged at random.

  According to the aspect of the present invention, it is possible to suppress the occurrence of warping and curving even when a woody base material having a dimensional change per 1% moisture content change larger than 0.02% is used as the wooden base material. As a result, it is possible to provide a floor cosmetic that can prevent generation of an unpleasant rubbing sound accompanying walking of a pet or the like without impairing the anti-slip performance over time.

It is sectional drawing which shows typically the structural example of the decorative material for floors concerning embodiment of this invention. It is a top view which shows typically the structural example of the decorative material for floors concerning embodiment of this invention. It is a top view which shows typically the other structural example (modification 1) of the floor decorative material which concerns on embodiment of this invention. It is a top view which shows typically the other structural example (modification 2) of the floor decorative material which concerns on embodiment of this invention. It is a top view which shows typically the structural example of the decorative material for floors concerning a comparative example. It is a schematic diagram which shows the example at the time of applying to a floor heating system.

Next, embodiments of the present invention will be described with reference to the drawings.
Here, the drawings are schematic, and the relationship between the thickness and the planar dimensions, the ratio of the thickness of each layer, and the like are different from the actual ones. Further, the embodiment described below exemplifies a configuration for embodying the technical idea of the present invention, and the technical idea of the present invention is that the material, shape, structure, etc. of the component parts are as follows. It is not something specific. The technical idea of the present invention can be variously modified within the technical scope defined by the claims described in the claims.
As shown in FIG. 1, the floor decorative material 10 of the present embodiment is provided with a decorative sheet 1 on one surface (front surface) of a wooden base material 11 and the other surface of the wooden base material 11 ( A moisture-proof film 20 is provided on the back surface.

<Wood base material 11>
The wooden base material 11 uses a wooden base material whose dimensional change per 1% moisture content change is larger than 0.02% and whose average moisture content is 6 to 10% by mass. As such a wood substrate 11, for example, one of medium density wood fiber board (MDF), high density wood fiber board (HDF), particle board (PB), softwood plywood and early-wood plywood, or these boards The base material comprised by laminating | stacking two or more board selected from can be illustrated.
In this way, the Lauan alternative material is used as the wooden base material 11. In other words, it is a material that replaces the conventional lauan plywood and the like, for example, at least one of medium density wood fiber board (MDF), high density wood fiber board (HDF), particle board (PB), softwood plywood, early-wood plywood, etc. Use seeds. Examples of early mature trees include poplar, falkata, acacia, chamelere, eucalyptus, terminaria and the like. These Lauan alternative materials have a dimensional change per 1% moisture content change greater than 0.02%.

Here, the “dimensional change per 1% moisture content” in the present specification is a dimensional change measured by the following procedure.
(1) Prepare a test piece of the wooden substrate 11 cut to 300 mm × 303 mm.
(2) In a normal temperature (25 ° C.) environment, the current dimensions (length of four sides) of the test piece are measured with a caliper.
(3) The test piece is left in a 40 ° C. oven (humidity free, dry atmosphere≈0% humidity) for one week.
(4) After 1 week, the mass 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.

The thickness of the wooden substrate 11 is not particularly limited, but is preferably about 2 to 15 mm, and more preferably about 2 to 12 mm.
In this embodiment, the average moisture content is 6 to 10% by mass as the wooden base material 11, and the moisture content in the center is used in preparation for the case where the floor decorative material 10 is cut according to the construction site. It is preferable to use the wooden substrate 11 having a range of -1% to + 2% as compared with the moisture content of the peripheral portion. When the size of the wooden base material 11 is, for example, about 150 mm long × 1840 mm wide (especially, the length of the short side is 200 mm or less), warping may occur due to a deviation in the moisture content between the central portion and the peripheral portion of the wooden base material 11. A bend is likely to occur. Therefore, by setting the moisture content characteristic of the wooden base material 11 to the above-described conditions, it is possible to suppress the occurrence of warping or curving even when the decorative material for floor 10 is cut and used. In addition, as a case where the decorative material 10 for floors is cut and used, the case where it constructs in the corner | angular part (a wall side or the periphery of a pillar) of the room which constructs the decorative material 10 for floors is specifically assumed.

6-10 mass% is preferable and, as for the average moisture content of the wooden base material 11, 6.5-8.0 mass% is more preferable. If the average moisture content is within the above range, it is easy to suppress the occurrence of curving and warping after cutting. Among them, when the floor decorative material 10 is used for floor heating, the average moisture content is preferably set to 6 to 9% by mass.
The moisture content of the wood base 11 is preferably in the range of -1% to + 2%, and in the range of -0.5% to + 1.0%, as compared with the moisture content of the central part. It is more preferable that In addition, the peripheral part of the wooden base material 11 means a range of 5 cm around the wooden base material 11, and the central part of the wooden base material 11 means the inside of the wooden base material 11 excluding the peripheral part.

Moreover, the average moisture content and moisture content difference (hereinafter, “moisture content difference” in the present specification indicates the moisture content difference between the peripheral portion and the central portion of the wood substrate 11) are as follows. It is a value measured by.
(A) A wood base 11 having a length of 303 mm and a width of 1818 mm is prepared.
(B) A range of 5 cm from the periphery of the wooden substrate 11 is defined as a peripheral portion, and an inner side thereof is defined as a central portion.
Thirty-five 35 cm × 5 cm samples are collected from the prepared wooden base material 11 and the water content is measured by a total dry method. The all-dry method is a method in which each sample is left in an oven at 105 ° C. for 3 days, and then the moisture content of each sample is measured from the following calculation formula. Before leaving is referred to as before processing, and after leaving is referred to as after processing.
Moisture content (%) = {(mass before treatment−mass after treatment) / mass after treatment} × 100
(C) The average value of 35 samples is defined as “average moisture content”.
(D) The value obtained by subtracting the average value of the peripheral samples (20 samples) from the average value of the central samples (15 samples) is defined as “moisture content difference”.

<Dampproof film 20>
The moisture-proof film 20 has a moisture permeability of 7 g / m ² · 24 hours or less.
The moisture permeability of the present embodiment is a measured value in a temperature 40 ° C., humidity 90% RH environment according to JIS Z0208 (moisture permeability test method (cup method)). Hereinafter, the moisture permeability in the present specification is a measured value under these conditions.
The moisture-proof film 20 of the present embodiment includes a resin base layer 21 and a vapor deposition layer 22 formed on the base layer 21. As a result, the moisture permeability becomes 7 g / m 2 · 24 hours or less. The moisture-proof film 20 preferably has a moisture permeability of 1 g / m ² · 24 hours or less.

The moisture-proof film 20 preferably has a surface protective layer 23 on the vapor deposition layer 22. At this time, it is preferable that the moisture-proof film 20 has a primer layer between the base material layer 21 and the vapor deposition layer 22.
Furthermore, it is preferable that an adhesive primer layer is formed on at least one of the front and back surfaces of the moisture-proof film 20.
By providing the moisture-proof film 20 having a moisture permeability of 7 g / m ² · 24 hours or less on the back surface, the moisture permeability of the back surface of the wooden substrate 11 is kept low. Therefore, even when a lauan substitute material having a dimensional change amount per 1% moisture content change larger than 0.02% is used as the wood substrate 11 and the decorative sheet 1 having low moisture permeability is laminated on the surface, The moisture permeability of the back surface and the surface of the base material 11 can be set to the same level. For this reason, generation | occurrence | production of the curvature and the bending of the decorative material 10 for floors is fully suppressed. Such a floor decorative material 10 of the present invention is suitable as a floor decorative material 10 to be constructed on the floor surface of various buildings and as a floor decorative material 10 used for floor heating as a special application.

  The base material layer 21 of the moisture-proof film 20 is made of resin, for example, olefinic thermoplastic resins such as polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl alcohol copolymer, and mixtures thereof; polyethylene terephthalate, poly Ester thermoplastic resins such as butylene terephthalate, polyethylene naphthalate, polyethylene naphthalate-isophthalate copolymer, polycarbonate, polyarylate; acrylic heat such as methyl polymethacrylate, ethyl polymethacrylate, polybutyl acrylate Non-halogen thermoplastic resins such as polyimide resin, polyurethane, polystyrene, acrylonitrile-butadiene-styrene resin, and the like.

The base material layer 21 may be a sheet stretched in a uniaxial or biaxial direction, or may be unstretched. When forming the vapor deposition layer 22, the sheet | seat extended | stretched to the biaxial direction is preferable for reasons such as strong mechanical strength and excellent dimensional stability. A suitable thickness of the base layer 21 made of synthetic resin is approximately 9 to 25 μm.
Examples of the vapor deposition layer 22 include an inorganic vapor deposition layer made of a metal thin film typified by aluminum, and an inorganic oxide vapor deposition layer made of an inorganic oxide thin film typified by silicon oxide, magnesium oxide, and aluminum oxide. The vapor deposition layer 22 is formed on the base material layer 21 made of a synthetic resin by a known vapor deposition method such as a vacuum vapor deposition method or a plasma activated chemical reaction vapor deposition method. More preferably, the vapor deposition layer 22 is an inorganic oxide vapor deposition layer that is transparent.
In order to further improve the gas barrier property of the vapor deposition layer 22, it is preferable to provide a surface protective layer 23 on the vapor deposition layer 22.

Examples of the surface protective layer 23 include polyvinyl alcohol resins. Moreover, the general formula ^{_{R 1 n M (OR 2)}} m ( where in the ^formula, 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 represents an integer of 1 or more, and n + m represents a valence of M), and a polyvinyl alcohol resin and / or an ethylene / vinyl alcohol copolymer. Furthermore, a composition prepared by polycondensation by a sol-gel method in the presence of a sol-gel method catalyst, an acid, water and an organic solvent can be mentioned. Further, by combining polyvinyl alcohol and an ethylene / vinyl alcohol copolymer, gas barrier properties, water resistance, weather resistance and the like are remarkably improved. A silane coupling agent or the like may be added to the composition. The surface protective layer 23 is obtained by applying these resins or compositions on the vapor deposition layer 22 by a known coating method such as a roll coating method or a gravure coating method. The surface protective layer 23 also functions as a protective layer for the vapor deposition layer 22, and a thickness of about 1 to 10 μm is appropriate.

At least one of the surface of the base material layer 21 and the surface protective layer 23 is preferably subjected to a surface treatment such as a corona treatment as necessary. By such surface treatment, the adhesive strength with the adjacent layer can be further increased. Further, a primer layer may be further provided between the base material layer 21 and the vapor deposition layer 22 and on one side or both sides of the moisture-proof film 20.
These primer layers are provided in order to enhance the adhesion between the base material layer 21 and the vapor deposition layer 22 and to enhance the adhesion when the moisture-proof film 20 is laminated on another layer.
Examples of the resin used for the primer layer include ester resins, urethane resins, acrylic resins, polycarbonate resins, vinyl chloride-vinyl acetate copolymers, polyvinyl butyral resins, nitrocellulose resins, and the like. These resins can be used alone or in combination. The primer layer can be formed using an appropriate application means such as a roll coating method or a gravure printing method.

  Among these, the primer layer is preferably formed from (i) a copolymer of an acrylic resin and a urethane resin and (ii) an isocyanate. That is, the copolymer of (i) an acrylic resin and a urethane resin is composed of an acrylic polymer component having a hydroxyl group at the terminal (component A), a polyester polyol component having a hydroxyl group at both ends (component B), and a diisocyanate component (component). C) is mixed and reacted to form a prepolymer, and a chain extender (component D) such as diamine is further added to the prepolymer to extend the chain. By this reaction, polyester urethane is formed and an acrylic polymer component is introduced into the molecule to form an acrylic-polyester urethane copolymer having a hydroxyl group at the terminal. The acrylic-polyester urethane copolymer is formed by reacting the terminal hydroxyl group with the isocyanate (ii) and curing.

  As the component A, a linear acrylate polymer having a hydroxyl group at the terminal is used. Specifically, linear polymethyl methacrylate (PMMA) having a hydroxyl group at the terminal is preferable because it is excellent in weather resistance (particularly, characteristics against photodegradation) and can be easily copolymerized with urethane. The component A is an acrylic resin component in the copolymer, and those having a molecular weight of 5000 to 7000 (mass average molecular weight) are preferably used because of particularly good weather resistance and adhesiveness. In addition, the component A may be used only having a hydroxyl group at both ends, but a mixture in which a conjugated double bond remains at one end is mixed with the one having a hydroxyl group at both ends. Also good.

  The component B reacts with diisocyanate to form polyester urethane and constitutes a urethane resin component in the copolymer. The component B is a polyester diol having hydroxyl groups at both ends. Examples of the polyester diol include an addition reaction product of a diol compound having an aromatic or spiro ring skeleton and a lactone compound or a derivative thereof, or an epoxy compound, a condensation product of a dibasic acid and a diol, and a cyclic ester compound. Examples thereof include a derived polyester compound. Examples of the diol include short-chain diols such as ethylene glycol, propylene glycol, diethylene glycol, butanediol, hexanediol, and methylpentenediol; and alicyclic short-chain diols such as 1,4-cyclohexanedimethanol. it can. Examples of the dibasic acid include adipic acid, phthalic acid, isophthalic acid, terephthalic acid and the like. Preferred as the polyester polyol is adipic acid using adipic acid or a mixture of adipic acid and terephthalic acid as the acid component, particularly preferably adipic acid, and 3-methylpentenediol and 1,4-cyclohexanedimethanol as the diol component. Polyester.

  In the primer layer, the urethane resin component formed by the reaction of the component B and the component C gives flexibility to the primer layer and contributes to improvement in adhesion. Moreover, the acrylic resin component which consists of an acrylic polymer contributes to a weather resistance and blocking resistance in the said primer layer. In the urethane resin, the molecular weight of the component B may be within a range in which a urethane resin capable of sufficiently exhibiting flexibility in the primer layer is obtained. Adipic acid or a mixture of adipic acid and terephthalic acid, and 3-methylpentanediol And in the case of the polyester diol which consists of 1, 4- cyclohexane dimethanol, 500-5000 (mass average molecular weight) is preferable.

  As the component C, an aliphatic or alicyclic diisocyanate compound having two isocyanate groups in one molecule is used. Examples of the diisocyanate include tetramethylene diisocyanate, 2, 2, 4 (2, 4, 4) -1, 6-hexamethylene diisocyanate, isophorone diisocyanate, 4, 4′-dicyclohexyl methane diisocyanate, and 1, 4′-cyclohexyl. A diisocyanate etc. can be mentioned. As the diisocyanate component, isophorone diisocyanate is preferable in terms of physical properties and cost. When the above-mentioned components A to C are reacted, the equivalent ratio of the total hydroxyl group (may be an amino group) of the acrylic polymer, polyester polyol and chain extender described below and the isocyanate group is such that the isocyanate group becomes excessive. To.

  When the above three components A, B and C are reacted at 60 to 120 ° C. for about 2 to 10 hours, the isocyanate group of the diisocyanate reacts with the hydroxyl group at the end of the polyester polyol to form a polyester urethane resin component and an acrylic polymer. A compound in which diisocyanate is added to the terminal hydroxyl group is also mixed, and a prepolymer is formed in a state where excess isocyanate group and hydroxyl group remain. As a chain extender, for example, a diamine such as isophorone diamine or hexamethylene diamine is added to this prepolymer, the isocyanate group is reacted with the chain extender, and the chain is extended so that the acrylic polymer component is contained in the polyester urethane molecule. The (i) acrylic-polyester urethane copolymer introduced and having a hydroxyl group at the terminal can be obtained.

  Addition of isocyanate of (ii) to acrylic-polyester urethane copolymer of (i), coating method, coating solution adjusted to necessary viscosity in consideration of coating amount after drying, gravure coating method, roll The primer layer may be formed by coating by a known coating method such as a coating method. The isocyanate of (ii) may be any isocyanate that can be crosslinked and cured by reacting with the hydroxyl group of the acrylic-polyester urethane copolymer of (i). An aliphatic isocyanate can be used, and an aliphatic isocyanate is particularly desirable from the viewpoint of thermal discoloration prevention and weather resistance. Specifically, tolylene diisocyanate, xylylene diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, lysine diisocyanate monomer, multimers such as dimer and trimer thereof, or these And polyisocyanates such as derivatives (adducts) obtained by adding the above isocyanate to a polyol.

As the coating amount after drying of the primer layer is from 1 to 20 g / ^{m 2,} preferably from 1 to 5 g / ^{m 2.} Moreover, the said primer layer is good also as a layer which added additives, such as fillers, such as a silica powder, a light stabilizer, and a coloring agent, as needed.
When the moisture-proof film 20 is laminated on the wooden substrate 11, a known adhesive can be used. Examples of the adhesive include polyvinyl acetate, polyvinyl chloride, vinyl chloride / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ionomer, butadiene / acrylonitrile rubber, neoprene rubber, natural rubber, and the like as active ingredients. Adhesives to be used. Although the thickness of an adhesive bond layer is not limited, About 0.1-50 micrometers is preferable.

<Decoration sheet 1>
The decorative sheet 1 is provided with, for example, a printing layer 3 (solid ink layer / pattern ink layer) and a resin layer 4 in this order on a base sheet 2. Protrusions described later are formed on the resin layer 4.
In this embodiment, the case where it has the topcoat layer 7 on the resin layer 4 is illustrated. The top coat layer 7 contains at least one of a thermosetting resin and an ionizing radiation curable resin as a main component.
The decorative sheet 1 preferably has a moisture permeability of 7 g / m ² · 24 hours or less at a temperature of 40 ° C. and a humidity of 90%, more preferably 5 g / m ² · 24 hours or less.

  As the base material sheet 2, for example, paper, a woven fabric or a non-woven fabric, and a resin sheet are laminated in one or more layers. Examples of the paper include paper such as thin paper, high-quality paper, kraft paper, Japanese paper, titanium paper, resin-impregnated paper, and inter-paper reinforced paper. Examples of the woven or non-woven fabric include woven or non-woven fabric made of wood fiber, glass fiber, asbestos, polyester fiber, vinylon fiber, rayon fiber and the like. Examples of the resin sheet include synthetic resin sheets such as polyolefin, polyester, polyacryl, polyamide, polyurethane, and polystyrene. Of these, polyolefin resins can be preferably used in terms of environmental compatibility, processability, and cost. In addition, the grade and composition of the resin can be selected in consideration of ease of sheeting, printability, and suitability for bending.

As for the thickness of the base material sheet 2, about 20-300 micrometers is preferable. The base sheet 2 may be colored as necessary. Further, the surface may be subjected to surface treatment such as corona discharge treatment, plasma treatment, or ozone treatment.
The printing layer 3 is composed of a pattern ink layer or a solid ink layer. The printing layer 3 can be formed by a printing method such as gravure printing, offset printing, and silk screen printing. Examples of the pattern of the pattern ink layer include a wood grain pattern, a stone pattern, a cloth pattern, a skin pattern, a geometric pattern, characters, symbols, line drawings, various abstract patterns, and the like. The solid ink layer is obtained by solid printing of colored ink. The printing layer 3 is composed of one or both of a pattern ink layer and a solid ink layer.

  As the ink used for the printing layer 3, as a vehicle, chlorinated polyolefin such as chlorinated polyethylene and chlorinated polypropylene, polyester, polyurethane comprising isocyanate and polyol, polyacryl, polyvinyl acetate, polyvinyl chloride, vinyl chloride-vinyl acetate. A copolymer, a cellulose resin, a polyamide resin or the like may be used alone or in combination, and a pigment, a solvent, various auxiliary agents, and the like may be added thereto to make an ink. Among these, from the viewpoint of environmental problems, adhesion to the printing surface, and the like, one or a mixture of two or more of polyester, polyurethane composed of isocyanate and polyol, polyacryl, polyamide-based resin, and the like is preferable.

The resin layer 4 will not be specifically limited if it is the transparent resin layer 4, For example, it can form suitably with a transparent thermoplastic resin.
Specifically, soft, semi-rigid or rigid polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-acrylic acid ester copolymer Examples include polymers, ionomers, acrylic esters, and methacrylic esters. Among the above, polyolefin resins such as polypropylene are preferable.

The resin layer 4 may be colored. In this case, a colorant may be added to the thermoplastic resin. As the colorant, a pigment or dye used in the printing layer 3 can be used.
The resin layer 4 includes a filler, a matting agent, a foaming agent, a flame retardant, a lubricant, an antistatic agent, an antioxidant, an ultraviolet absorber, a light stabilizer, a radical scavenger, a soft component (for example, rubber), and the like. Various additives may be included.
The topcoat layer 7 (topcoat layer) is provided for imparting surface physical properties such as scratch resistance, abrasion resistance, water resistance, and stain resistance required for the decorative sheet 1. The resin forming the top coat layer 7 is preferably a curable resin such as a thermosetting resin or an ionizing radiation curable resin. In particular, ionizing radiation curable resins are preferable from the viewpoint of high surface hardness, productivity, and the like.

Examples of thermosetting resins include unsaturated polyester resins, polyurethane resins (including two-component curable polyurethane), epoxy resins, amino alkyd resins, phenol resins, urea resins, diallyl phthalate resins, melamine resins, guanamine resins, and melamines. -Urea co-condensation resin, silicon resin, polysiloxane resin and the like.
A curing agent such as a crosslinking agent and a polymerization initiator, and a polymerization accelerator can be added to the resin. For example, as curing agents, isocyanates, organic sulfonates, etc. can be added to unsaturated polyester resins, polyurethane resins, etc., organic amines, etc. can be added to epoxy resins, peroxides such as methyl ethyl ketone peroxide, azoisobutyl nitrile, etc. A radical initiator can be added to the unsaturated polyester resin.
Examples of the method for forming the topcoat layer 7 with a thermosetting resin include a method in which a solution of a thermosetting resin is applied by a coating method such as a roll coating method or a gravure coating method and then dried and cured. The coating amount of the solution is about 5 to 30 μm, preferably about 5 to 20 μm in terms of solid content.

The ionizing radiation curable resin is not limited as long as it is a resin that undergoes a crosslinking polymerization reaction upon irradiation with ionizing radiation and changes to a three-dimensional polymer structure. For example, one or more prepolymers, oligomers and monomers having a polymerizable unsaturated bond or epoxy group that can be crosslinked by irradiation with ionizing radiation in the molecule can be used. Examples thereof include acrylate resins such as urethane acrylate, polyester acrylate, and epoxy acrylate; silicon resins such as siloxane; polyester resins; epoxy resins and the like.
Examples of the ionizing radiation include visible light, ultraviolet light (near ultraviolet light, vacuum ultraviolet light, etc.), X-rays, electron beams, ion beams, etc. Among them, ultraviolet light and electron beams are preferable.

As the ultraviolet light source, a light source such as an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc lamp, a black light fluorescent lamp, or a metal halide lamp can be used. The wavelength of ultraviolet light is about 190 to 380 nm.
As the electron beam source, various electron beam accelerators such as a cockcroft-wald type, a bandegraft type, a resonant transformer type, an insulating core transformer type, a linear type, a dynamitron type, and a high frequency type can be used. The energy of the electron beam is preferably about 100 to 1000 keV, more preferably about 100 to 300 keV. The irradiation amount of the electron beam is preferably about 2 to 15 Mrad.
The ionizing radiation curable resin is sufficiently cured when irradiated with an electron beam, but it is preferable to add a photopolymerization initiator (sensitizer) when it is cured by irradiation with ultraviolet rays.

Examples of the photopolymerization initiator in the case of a resin system having a radically polymerizable unsaturated group include acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ether, Michler benzoylbenzoate, Michler ketone, diphenyl sulfide, dibenzyl disulfide. , Diethyl oxide, triphenylbiimidazole, isopropyl-N, N-dimethylaminobenzoate and the like can be used. In the case of a resin system having a cationic polymerizable functional group, for example, at least one kind such as an aromatic diazonium salt, an aromatic sulfonium salt, a metallocene compound, a benzoin sulfonic acid ester, and a freeloxysulfoxonium diallyl iodosyl salt. Can be used.
Although the addition amount of a photoinitiator is not specifically limited, Generally it is about 0.1-10 mass parts with respect to 100 mass parts of ionizing radiation curable resins.

As a method for forming a protective layer with an ionizing radiation curable resin, for example, a solution of an ionizing radiation curable resin may be applied by a coating method such as a gravure coating method or a roll coating method. The coating amount of the solution is generally about 5 to 30 μm, preferably about 5 to 20 μm as a solid content.
In order to further impart scratch resistance and wear resistance to the topcoat layer 7 formed from an ionizing radiation curable resin, an inorganic filler may be blended. Examples of inorganic fillers include powdered aluminum oxide, silicon carbide, silicon dioxide, calcium titanate, barium titanate, magnesium pyroborate, zinc oxide, silicon nitride, zirconium oxide, chromium oxide, iron oxide, boron nitride, Examples include diamond, gold sand and glass fiber.
The addition amount of the inorganic filler is about 1 to 80 parts by mass with respect to 100 parts by mass of the ionizing radiation curable resin.
Lamination of each layer is performed by, for example, forming a printing layer 3 (solid ink layer, pattern ink layer) sequentially on one surface of the base sheet 2 and then printing a known dry material such as a two-component curable urethane resin on the printing layer 3. The transparent resin layer 4 can be laminated by a dry lamination method, a T-die extrusion method or the like through a lamination adhesive, and a top coat layer 7 can be formed.

Here, the decorative sheet 1 may have a synthetic resin layer (so-called backer layer) having a thickness of 100 μm or more in the lowermost layer (layer that adheres to the wooden base material 11). The backer layer means a buffer layer for the purpose of absorbing shock in the floor decorative material 10. Examples of the material constituting the backer layer include polypropylene, ethylene-vinyl alcohol copolymer, polymethylene, polymethylpentene, polyethylene terephthalate, and high heat-resistant polyalkylene terephthalate [for example, a part of ethylene glycol is 1, 4- Polyethylene terephthalate substituted with cyclohexanedimethanol or diethylene glycol, so-called trade name PET-G (manufactured by Eastman Chemical Company)], polybutylene terephthalate, polyethylene naphthalate, polyethylene naphthalate-isophthalate copolymer, polycarbonate, poly Examples include arylate, polyimide, polystyrene, polyamide, and ABS. These resins can be used alone or in combination of two or more. The upper limit of the thickness of the backer layer is not limited, but 600 μm is appropriate.
When laminating the decorative sheet 1 on the wooden substrate 11, a known adhesive can be used. Examples of the adhesive include polyvinyl acetate, polyvinyl chloride, vinyl chloride / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ionomer, butadiene / acrylonitrile rubber, neoprene rubber, natural rubber, and the like as active ingredients. Adhesives to be used. Although the thickness of an adhesive bond layer is not limited, About 0.1-50 micrometers is preferable.

<Convex part 5>
In the decorative material for floor 10 of the present embodiment, a plurality of convex portions 5 are formed on the surface on the decorative sheet 1 side.
The height of each convex part 5 is in the range of 20 μm or more and 80 μm or less, and each convex part 5 in plan view has a circle diameter in the range of 40 μm or more and 200 μm or less when the area is converted into a circular shape. is there. Further, the plurality of protrusions 5 are randomly arranged in a range where the ratio of the plurality of protrusions 5 per unit area in plan view is 0.05 or more and 0.5 or less.
Each convex portion 5 is preferably formed of one of a regular polygonal shape or a circular shape in plan view. However, it is preferable that the plurality of convex portions 5 have the same shape and size.

As shown in FIG. 2, the shape (hereinafter referred to as a planar shape) of each of the plurality of convex portions 5 in a plan view is a rectangle (for example, a square), and the arrangement thereof is a random arrangement (that is, an arrangement without regularity). It has become. Since the convex portions 5 are randomly arranged, unpleasant rubbing noise associated with walking of a pet or the like is suppressed.
What is necessary is just to provide the some convex part 5 in the resin layer 4 which consists of a transparent thermoplastic resin of the decorative sheet 1. The formation method of the convex part 5 may be, for example, a method of forming an uneven shape on the surface of the resin layer 4 by heating and pressing using an embossing mold (so-called embossing). When forming the resin layer 4 with an extruder, the convex part 5 can be formed in the surface of the resin layer 4 with an embossing roll etc. immediately after extrusion.

When the convex portions 5 are regularly arranged at regular intervals such as a houndstooth (for example, see FIG. 5 to be described later), a rubbing sound accompanying walking of a pet or the like is generated at the same frequency. Resonates and amplifies, and is felt in the human ear as an unpleasant rubbing sound. In the present embodiment, since the convex portions 5 are randomly arranged, the frequency of the rubbing sound is not uniform, and the resonance and amplification of rubbing are suppressed. For this reason, suppression of an unpleasant rubbing sound that can be heard by the ear can be realized.
The random arrangement of the convex portions 5 may be arranged in consideration of having no regularity, and in that case, a certain effect can be expected. In addition, the random arrangement of the convex portions 5 becomes more effective by randomly arranging them using random number calculation.
The convex portion 5 preferably has a height of 20 μm or more and 80 μm or less. If the height of the convex portion 5 is less than 20 μm, the anti-slip performance is inferior. Here, the height of the convex part 5 is the height A from the bottom part to the top part of the convex part 5 as shown in FIG.1 (b). This height A is also the height difference between the adjacent convex portions 5 and concave portions 6 among the concaves and convexes formed on the surface of the resin layer 4.

As shown in FIG. 2B, the length B of one side of the convex portion 5 is preferably 40 μm or more and 200 μm or less in plan view. If the length B of one side of the convex part 5 is less than 40 μm, the slip resistance is inferior, and if it is larger than 200 μm, the convex part 5 is easily visible with the naked eye, and the design feeling is not preferable. Further, the surface density of the protrusions 5 (that is, the ratio of the protrusions 5 per unit area in plan view) is preferably 0.05 or more and 0.5 or less. When this areal density is less than 0.05 or greater than 0.5, the slip resistance is poor. In the case the planar shape of the convex portion 5 is square, the surface density of the protrusions 5 can be expressed by n × B ^{2 /} C ^2. Here, C is the length of one side of a square arbitrarily defined in plan view, and n is the number of convex portions 5 included in the square.

When the top coat layer 7 is provided on the outermost surface of the resin layer 4 on which the convex portions 5 are formed, a cross-linked resin such as a thermosetting resin, an ultraviolet curable resin, or an electron beam curable resin is used. Thus, the weather resistance, scratch resistance, stain resistance and the like of the decorative sheet 1 for antiskid floor can be enhanced. In addition, the shape of the convex part 5 formed in the surface of the resin layer 4 is reflected in the topcoat layer 7 formed on it, and the convex part 5 is also formed in the surface of the topcoat layer 7.
The floor decorative material 10 as described above can also be used as a floor heating floor material. In this case, as shown in FIG. 6, for example, a heating appliance 100 provided with heating means such as a hot water pipe is disposed below the floor decorative material 10. Warpage of the cosmetic material 10 for use is prevented, and deterioration over time of the anti-slip effect can be more effectively prevented.

<Modification 1 of the convex part 5>
In the above embodiment, the case where the planar shape of the convex portion 5 is a square has been described. However, in the present invention, the planar shape of the convex portion 5 is not limited to a square. The planar shape of the convex portion 5 may be a rectangle or a polygon other than a square (triangle, pentagon, hexagon,...).
As shown in FIG. 3A, the planar shape of the convex portion 5 may be an equilateral triangle. As shown in FIG. 3B, the length B of one side of the equilateral triangle is preferably 40 μm or more and 200 μm or less. When the length B of one side is less than 40 μm, the slip resistance is poor, and when it is more than 200 μm, the convex portion 5 is easily visible with the naked eye, and the design feeling is not preferable. Also in the first modification, the surface density of the protrusions 5 (that is, the ratio of the protrusions 5 per unit area in plan view) is preferably 0.05 or more and 0.5 or less. When this areal density is less than 0.05 or greater than 0.5, the slip resistance is poor. When the planar shape of the convex portion 5 is an equilateral triangle, the surface density can be expressed by n × (√3 / 4) × B ² / C ² . Here, C is the length of one side of a square arbitrarily defined in plan view, and n is the number of convex portions 5 of an equilateral triangle included in this square.
Moreover, although not shown in figure, also in this modification 1, the height of the convex part 5 has preferable 20 micrometers or more and 80 micrometers or less. If the height of the convex portion 5 is less than 20 μm, the anti-slip performance is inferior.
The modification 1 shown in FIG. 3 also has the same effect as the above embodiment.

<Modification 2 of the convex part 5>
In the present embodiment, the planar shape of the convex portion 5 is not limited to a polygon, and may be a circle (eg, a regular circle or an ellipse).
As shown in FIG. 4A, the planar shape of the convex portion 5 may be a perfect circle. As shown in FIG. 4B, the diameter B of the perfect circle is preferably 40 μm or more and 200 μm or less. When the diameter B is less than 40 μm, the anti-slip property is inferior. Also in the second modification, the surface density of the protrusions 5 (that is, the ratio of the protrusions 5 per unit area in plan view) is preferably 0.05 or more and 0.5 or less. When this areal density is less than 0.05 or greater than 0.5, the slip resistance is poor. When the planar shape of the convex portion 5 is a regular circle, the surface density can be expressed by n × (π / 4) × B ² / C ² . Here, C is the length of one side of the square arbitrarily defined in plan view, and n is the number of regular circular convex portions 5 included in the square.
Moreover, although not shown in figure, also in this modification 2, the height of the convex part 5 is preferably 20 μm or more and 80 μm or less. If the height of the convex portion 5 is less than 20 μm, the anti-slip performance is inferior.
The modification 2 shown in FIG. 4 also has the same effect as the above embodiment.

<Modification 3 of the convex part 5>
Further, as shown in FIG. 1, in the above embodiment, when the shape (hereinafter referred to as a cross-sectional shape) of the convex portion 5 in a cross-sectional view is a rectangle (that is, a columnar shape with a constant width from the bottom portion to the top portion). ) Explained. However, in this invention, the cross-sectional shape of the convex part 5 is not limited to a rectangle. In the present invention, the cross-sectional shape of the convex portion 5 may be trapezoidal (that is, a columnar shape whose width gradually decreases from the bottom toward the top) or may be a cone. Even with such a configuration, the same effects as those of the above-described embodiment can be obtained.

<Effect of embodiment>
The embodiment of the present invention has the following effects.
(1) The floor decorative material 10 has a moisture-proof film 20 having a moisture permeability of 7 g / m ² · 24 hours or less.
According to this structure, the moisture permeability of the back surface of the wooden base material 11 is suppressed low. Therefore, even when the decorative sheet 1 is laminated on the surface using a Lauan alternative material in which the dimensional change per 1% moisture content change is larger than 0.02% as the wooden substrate 11, one of the wooden substrates 11 is laminated. The moisture permeability of the surface and the other surface can be set to the same level. As a result, the occurrence of warping and bending of the floor decorative material 10 is sufficiently suppressed.
Such a floor decorative material 10 of the present invention is suitable as a floor decorative material 10 to be constructed on the floor surface of various buildings and as a floor decorative material 10 used for floor heating as a special application.
(2) In plan view, the length B of one side of the convex portion 5 is 40 μm or more and 200 μm or less. Further, the surface density of the convex portions 5 (that is, the ratio of the convex portions 5 per unit area in plan view) is 0.05 or more and 0.5 or less. The height A of the convex part 5 is 20 μm or more.
Thereby, high anti-slip performance can be realized.

(3) Moreover, the convex part 5 is arrange | positioned at random.
As a result, the frequency of the rubbing sound is not uniform, and the resonance and amplification of the rubbing sound are suppressed, so that the unpleasant rubbing sound that can be heard by the ear can be suppressed.
From the above, the slip-proof floor decorative sheet 1 and the floor-use decorative material 10 using the same can prevent the generation of an unpleasant rubbing sound accompanying walking of a pet or the like without impairing the slip-proof performance as a general floor material. Can be provided.
(4) Further, the resin layer 4 having the convex portions 5 on the surface is covered with the top coat layer 7.
Thereby, the decorative sheet 1 for slip-proof floors and the decorative material 10 for floors excellent in durability (namely, weather resistance, scratch resistance, and stain resistance) can be provided.

  As described above, the floor decorative material 10 of the present embodiment can prevent the generation of unpleasant rubbing noise associated with walking of a pet or the like without impairing the anti-slip performance. At this time, even when a woody base material having a dimensional change amount per 1% moisture content change larger than 0.02% is used as the woody base material 11, the occurrence of warping and curving is suppressed, so that Since the warpage is suppressed at a cost, the above-described anti-slip performance can be improved.

Next, examples according to the present invention will be described.
<Example 1>
A polypropylene film (“OW” manufactured by Riken Technos Co., Ltd.) is used as the base sheet 2, and a gravure printing machine is used for gravure ink (“Lamister” manufactured by Toyo Ink Manufacturing Co., Ltd.) as a printing layer 3 on one side thereof. And printed. Thereafter, gravure coating is applied to the surface opposite to the printed layer 3 of the substrate sheet 2 (that is, the other surface) so that the two-component urethane primer resin containing silica powder has a thickness of 1 μm after drying. did. On the printing layer 3, a two-component urethane resin adhesive having a polyester polyol as a main component and isophorone diisocyanate as a curing agent was applied so that the coating amount after drying was 2 g / m ² . Thereafter, as the transparent thermoplastic resin layer 4, 80 μm of the transparent thermoplastic resin layer 4 mainly composed of 10 μm of the transparent adhesive layer (maleic acid-modified polypropylene resin) and homopolypropylene (manufactured by Prime Polymer Co., Ltd.) It was formed by coextrusion lamination so as to be on the printed layer 3 side, and at the same time, the convex portion 5 was formed by embossing.

A coating amount obtained by drying a coating liquid obtained by mixing a thermosetting acrylic urethane resin (manufactured by DIC Graphics) and an isocyanate curing agent (manufactured by DIC Graphics) as a top coat layer 7 on the surface. Coating was performed by coating so as to be about 10 g / m ² . Thereafter, the solvent was dried at a temperature of 60 ° C. for 30 seconds to obtain the desired decorative sheet 1 for non-slip floor. The shape of the convex portion 5 at this time is square in plan view, the arrangement is random, the height A is 30 μm, the length B of one side is 120 μm, and the surface density (n × B ² / C ² ) is. A decorative sheet 1 for a non-slip floor was prepared so as to be 0.20.

<Example 2>
Example 1 except that the arrangement of the protrusions 5 is random, the height A of the protrusions 5 is 20 μm, the length B of one side is 40 μm, and the surface density (n × B ² / C ² ) is 0.05. The decorative sheet 1 for non-slip floor of Example 2 was produced in the same procedure as described above.
<Example 3>
The same procedure as in Example 1 except that the arrangement of the protrusions 5 is random, the height A is 80 μm, the length B of one side is 200 μm, and the surface density (n × B ² / C ² ) is 0.50. Thus, a decorative sheet 1 for non-slip floor of Example 3 was produced.

<Comparative Example 1>
The arrangement of the convex portions 5 of the decorative sheet for floor 1 is random, the height A is 30 μm, the length B of one side is 30 μm, and the surface density (n × B ² / C ² ) is 0.20. A decorative sheet 1 for non-slip floor of Comparative Example 1 was produced in the same procedure as in Example 1.
<Comparative example 2>
The arrangement of the convex parts 5 of the decorative sheet for floor 1 is random, the height A is 10 μm, the length B of one side is 120 μm, and the surface density (n × B ² / C ² ) is 0.20. A decorative sheet 1 for non-slip floor of Comparative Example 2 was produced in the same procedure as Example 1.

<Comparative Example 3>
The arrangement of the convex parts 5 of the decorative sheet for floor 1 is random, the height A is 30 μm, the length B of one side is 120 μm, and the surface density (n × B ² / C ² ) is 0.03. A decorative sheet 1 for non-slip floor of Comparative Example 3 was produced in the same procedure as in Example 1.
<Comparative Example 4>
The arrangement of the convex portions 5 of the decorative sheet for floor 1 is random, the height A is 30 μm, the length B of one side is 120 μm, and the surface density (n × B ² / C ² ) is 0.60. A decorative sheet 1 for a non-slip floor of Comparative Example 4 was produced in the same procedure as in Example 1.

<Comparative Example 5>
FIG. 5 is a plan view schematically showing a configuration example of the floor decorative sheet 1 according to Comparative Example 5. As shown in FIG. As shown in FIG. 5, in Comparative Example 5, the convex portions 5 ′ on the surface of the decorative sheet for floor 1 are regularly arranged in a lattice pattern at intervals of 200 μm in the X-axis direction and intervals of 200 μm in the Y-axis direction. Was prepared in the same procedure as in Example 1 except that the length B of one side was 120 μm and the surface density (n × B ² / C ² ) was 0.14.

<Evaluation method and evaluation criteria>
The anti-slip floor decorative sheet 1 described in Examples 1 to 3 and Comparative Examples 1 to 5 is applied to the surface of a 3 mm thick MDF (hardwood) as a floor base material as a two-component aqueous emulsion adhesive ( By applying “Rikabond” (mass ratio BA-10L / BA-11B = 100: 2.5) manufactured by Chuo Rika Kogyo Co., Ltd. in a wet state to 100 g / m ² , bonding and curing for 24 hours Each floor decorative material 10 was formed.

In addition, the moisture-proof film 20 was bonded together on the back surface.
These floor decorative materials 10 were evaluated by the following methods (1) and (2).
(1) Anti-slip performance: A test was conducted according to JIS-A1454. S. R. The value was determined.
(2) Rubbing noise: evaluated by a sensory test. The evaluation was performed by 10 examiners.
The evaluation criteria are as follows.
X: 0 people considered good Δ: 1-6 people ○: 7-10 people Table 1 shows the evaluation results.

From the results in Table 1, it is verified that the anti-slip floor decorative sheet 1 of Examples 1 to 3 and the floor decorative material 10 using the same can suppress rubbing noise without impairing the anti-slip performance. I was able to.
Here, the floor decorative material 10 of Examples 1 to 3 was left in a 40 ° C. atmosphere (dry atmosphere) for 7 days (7 days), and the amount of warpage of the floor decorative material 10 was measured. It is confirmed that it is suppressed.
Further, the floor decorative material 10 of Examples 1 to 3 was left in a 40 ° C. atmosphere (atmosphere of 90% humidity) for 7 days (7 days), and the amount of warpage of the floor decorative material 10 was measured. It is confirmed that the warpage is suppressed.

  Thus, the floor decorative material 10 based on this invention has the dimensional change by the humidity of the wooden base material 11 effectively suppressed by presence of the moisture-proof film 20. FIG. For this reason, even if it employ | adopts as a heating floor material (floor material of a floor heating system) which arrange | positions the heating appliances 100, such as a hot-water mat, under the floor covering material 10, as a result of suppressing a curvature of a floor, etc. It can be seen that it is possible to suppress the aging degradation of the slip suppression effect.

DESCRIPTION OF SYMBOLS 1 Decorative sheet 2 Base material sheet 3 Print layer 4 Resin layer 5 Convex part 6 Concave part 7 Topcoat layer 10 Flooring material 11 Wood base material 20 Moisture-proof film 21 Base material layer 22 Deposition layer 23 Surface protective layer

Claims (8)

A decorative sheet for flooring provided with a decorative sheet on one side of the wooden base material and a moisture-proof film provided on the other side of the wooden base material,
The wood base material has a dimensional change amount per 1% moisture content change larger than 0.02% and an average moisture content in the range of 6 to 10% by mass,
The moisture-proof film has a moisture permeability of 7 g / m ² · 24 hours or less,
Furthermore, a plurality of convex portions are formed on the surface on the decorative sheet side in the decorative material for floors,
The height of the convex portion is in the range of 20 μm or more and 80 μm or less,
Each of the convex portions in plan view has a circle diameter in a range of 40 μm or more and 200 μm or less when the area is converted into a circular shape,
The floor decorative material, wherein the plurality of protrusions are randomly arranged in a range where the ratio of the plurality of protrusions per unit area in a plan view is 0.05 to 0.5.   Each said convex part consists of one of a regular polygon shape or circular shape by planar view, respectively, The flooring cosmetics described in Claim 1 characterized by the above-mentioned. The decorative sheet is provided with a printed layer and a resin layer in this order on the base sheet.
The floor decorative material according to claim 1, wherein the convex portion is formed on the resin layer. It has a top coat layer on the surface of the decorative sheet,
The floor covering material according to any one of claims 1 to 3, wherein the top coat layer contains at least one of a thermosetting resin and an ionizing radiation curable resin as a main component.   The floor decorative material according to any one of claims 1 to 4, wherein the plurality of convex portions have the same shape and size as each other.   The wood base material is one of medium density wood fiber board (MDF), high density wood fiber board (HDF), particle board (PB), softwood plywood and early-wood plywood, or two or more selected from these boards The floor decorative material according to any one of claims 1 to 5, wherein the floor decorative material is configured by laminating a plurality of plates.   The said moisture-proof film has a resin-made base material layer and the vapor deposition layer formed on the base material layer, The makeup | decoration for floors of any one of Claims 1-5 characterized by the above-mentioned. Wood.   The floor moisture-proof material according to claim 7, wherein the moisture-proof film has a surface protective layer on the vapor deposition layer.

Images