JP7017847B2 - Flooring material - Google Patents

Description

The present invention relates to a flooring material.

Conventionally, various flooring materials have been widely used. Above all, the floor material containing the resin layer is easily scratched and soiled when trampled by the sole of the foot or the sole of the shoe. Therefore, scratch resistance and stain resistance are required as the characteristics of the floor material including the resin layer. The scratch resistance means a property that the surface of the floor material is less likely to be scratched, and the antifouling property means a property that is hard to get dirty or a property that can easily remove dirt. Since the ionizing radiation curable resin has excellent scratch resistance, it is used for coating various base materials, and is also used for coating the surface of flooring materials.

For example, in Patent Document 1, one or more layers of non-chlorine thermoplastic resin are formed on a substrate sheet made of non-chlorine thermoplastic resin via a pattern printing layer, and the surface thereof is an electron beam. Alternatively, a floor sheet characterized by being provided with a transparent resin layer having suitability for repainting with an ultraviolet curable resin has been disclosed, and it has been studied to impart wear resistance and durability.

Further, Patent Document 2 describes (A) a photocurable (meth) acrylate resin, (B) a photocurable polysiloxane-based urethane (meth) acrylate resin, and (C) a photocurable silicone block (meth) acrylate resin. A photocurable (meth) acrylate-based resin composition having excellent stain-removing properties, which comprises a resin and (D) a photopolymerization initiator, is disclosed.

Japanese Patent Application Laid-Open No. 2003-13587 Japanese Patent No. 39455628

However, the floor sheet of Patent Document 1 does not have sufficient antifouling property and decontamination property, and further improvement is required. On the other hand, the photocurable resin composition of Patent Document 2 is said to be superior in stain removal property as compared with the conventional photocurable resin composition, but the photocurable resin composition of Patent Document 2 has slidability. It is not suitable for flooring applications that require high anti-slip properties.

An object of the present invention is to provide a flooring material having excellent antifouling property and decontamination property as well as excellent anti-slip property.

The present invention is a floor material including a resin layer and a floor material having a surface protective layer on the floor material main body, wherein the surface protective layer contains a cured product of an ionizing radiation curable resin composition. The ionizing radiation curable resin composition comprises at least one selected from an ionizing radiation curable silicon-modified urethane (meth) acrylate resin and an ionized radiation curable fluoromodified urethane (meth) acrylate resin, and anti-slip particles. Regarding flooring materials.

According to the present invention, it is possible to provide a flooring material having excellent antifouling property and decontamination property as well as excellent anti-slip property.

It is a top view which shows one Embodiment of the flooring material of this invention. It is sectional drawing which cut | cut the floor material of FIG. 1 in the thickness direction. It is sectional drawing which shows one Embodiment of the flooring material of this invention. It is a coating image of anti-slip particles. It is a test result of antifouling property and decontamination property.

As a result of examining the above-mentioned problems, the surface protective layer includes at least one selected from an ionizing radiation-curable silicon-modified urethane (meth) acrylate resin and an ionizing radiation-curable fluorine-modified urethane (meth) acrylate resin, and anti-slip particles. It has been found that by using a cured product of an ionizing radiation curable resin composition containing the above, it is excellent in antifouling property, stain removing property and anti-slip property.

The mechanism by which the flooring material of the present invention is excellent in antifouling property and decontamination property and also excellent in anti-slip property can be inferred as follows. The floor material of the present invention is an ionizing radiation curable resin composition having excellent antifouling properties, and at least one selected from an ionizing radiation curable silicon-modified urethane (meth) acrylate resin and an ionizing radiation curable fluoromodified urethane (meth) acrylate resin. Since the types are included, it is difficult for stain substances to adhere to the surface of the ionizing radiation curable resin due to the slidability and water / oil repellency of the functional groups of silicon and fluorine, and it is easy to remove the attached stain substances. As for the anti-slip property, since fine irregularities are formed on the surface of the surface protective layer due to the anti-slip particles, it can be sunk into the sole of the foot or the sole of the shoe when a person steps on it, and can have appropriate anti-slip property. It is estimated to be. Since the resin containing silicon and fluorine is ionizing and radiation curable, the ionizing radiation curable resin composition is integrally firmly adhered to the surface of anti-slip particles that form fine irregularities when the composition is cured. Will be done. In addition, since the main component is an ionizing radiation curable resin, the ionizing radiation curable resin composition adhered to the surface of the anti-slip particles and the surface of the anti-slip particles can be used on the sole of the foot or when a person steps on the floor material. It becomes difficult to peel off on the sole of the shoe. This makes it possible to prevent both the deterioration of the anti-slip property due to the exfoliation of the surface of the anti-slip particles and the decrease of the antifouling property due to the exfoliation of the resin containing silicon and fluorine. Further, unlike the case where silicon and a fluororesin composition such as silicon oil and fluororesin are mixed with an ionizing radiation curable resin, the anti-slip property is not lowered by bleeding.

The flooring material of the present invention has a flooring material main body and a surface protective layer on the flooring material main body. In the present specification, the upper side refers to the side far from the floor surface when the floor material is laid on the floor surface, and is also referred to as the front side. Further, the lower side refers to the side close to the floor surface when the floor material is laid on the floor surface, and is also referred to as the back side.

FIG. 1 is a plan view showing one embodiment of the flooring material of the present invention, and FIG. 2 is an enlargement of a cross-sectional view of the flooring material cut in the thickness direction. The flooring material 1 in the illustrated example is formed in a long strip shape in a plan view. The long strip is a rectangular shape whose length in one direction is sufficiently longer than the length in the other direction (the other direction is orthogonal to one direction), for example, the length in one direction is other. It is at least twice the length in the direction, preferably at least four times. The long strip-shaped flooring material 1 is usually wrapped in a roll and used for storage and transportation, and is cut into a desired shape and used at a construction site. However, the flooring material of the present invention is not limited to a long strip shape, and may be formed in a single-wafer shape such as a square shape in a plan view (not shown).

In the present invention, the floor material main body 2 is a main part constituting the strength and weight of the floor material. In the present invention, the floor material main body 2 includes a resin layer 22 containing a synthetic resin component. As the floor material main body 2, any material known in the art can be used as long as it contains the resin layer 22. For example, as shown in FIG. 2, the floor material main body 2 has a base material layer 21 and a shape stabilizing layer. Examples thereof include those having a structure in which layers such as 23, the decorative layer 24, and the surface layer 3 are arbitrarily combined.

The synthetic resin component of the resin layer 22 is not particularly limited, but a thermoplastic resin is preferable. Examples of the thermoplastic resin include vinyl chloride resin, olefin resin, vinyl acetate resin, acrylic resin, amide resin, ester resin, various elastomers, and rubber. Vinyl chloride resin is used from the viewpoint of processability, flexibility, cost, and the like. preferable. The synthetic resin component may be used alone or in combination of two or more.

As the vinyl chloride resin, a paste vinyl chloride resin, a suspension vinyl chloride resin and the like are used.

The paste vinyl chloride resin is, for example, a paste-like vinyl chloride resin obtained by an emulsion polymerization method, and its viscosity can be appropriately adjusted with a plasticizer. The paste vinyl chloride resin is a fine powder having a particle size of 0.1 to 10 μm (preferably 1 to 3 μm) composed of a large number of fine particle aggregates, and the surface of the fine powder is preferably coated with a surfactant. ing. The average degree of polymerization of the paste vinyl chloride resin is preferably about 1000 to 2000.

The suspension vinyl chloride resin is, for example, a vinyl chloride resin obtained by a suspension polymerization method. The suspension vinyl chloride resin is a fine powder having a particle size of preferably 20 μm to 100 μm. The average degree of polymerization of the suspension vinyl chloride resin is preferably about 700 to 1500, more preferably about 700 to 1100, and even more preferably about 700 to 1000. However, the particle size is the median diameter (D ₅₀ ) in the volume-based particle size distribution.

Each of the vinyl chloride resins preferably has a K value of about 60 to 95, and more preferably a K value of about 65 to 80.

The content of the synthetic resin component in the resin layer 22 is not particularly limited, but may be, for example, 5 to 100% by mass.

The resin layer 22 can optionally contain an additive, and examples of the additive include a filler, a plasticizer, a flame-retardant material, a stabilizer, an antioxidant, a lubricant, a colorant, and a foaming agent.

The resin layer 22 may be non-foamed or may be foamed. When the resin layer 22 is foamed, the foaming ratio is preferably 1.05 times or more, more preferably 1.1 times or more, and prevents it from becoming too soft from the viewpoint of imparting good cushioning properties to the floor material. From the viewpoint, 10 times or less is preferable, and 5 times or less is more preferable. That is, the foaming ratio of the resin layer 22 is preferably 1.05 to 10 times, more preferably 1.1 times to 5 times.

When there are a plurality of resin layers 22, the physical characteristics (material, presence / absence of foaming, thickness, etc.) of the resin layers 22 may be the same or different.

The base material layer 21 is a layer located on the lowermost side of the floor material, and enhances the adhesive strength with the adhesive (hereinafter referred to as the floor surface adhesive) that adheres the floor material to the floor surface at the time of laying, and the floor. This layer is intended to suppress warpage of the material. The base material layer 21 is not particularly limited, but for example, conventionally known sheet materials such as non-woven fabric, woven fabric, paper, and felt can be used. The material of the fiber constituting the non-woven fabric or the woven fabric is not particularly limited, and examples thereof include synthetic resin fibers such as polyester and polyolefin; inorganic fibers such as glass and carbon; and natural fibers.

The shape stabilizing layer 23 is a layer for suppressing a dimensional change of the floor material due to shrinkage or expansion over time. The surface protective layer 4 of the floor material 1 shrinks during curing and molding of the ionizing radiation curable resin composition. Since the floor material 1 is made of resin, unlike floor materials made of other materials such as wood, stone, and ceramic, it easily warps when it shrinks. Further, in order to increase the antifouling property, it is desirable to cover the surface of the anti-slip particles 5 with the resin of the surface protective layer 4, and in order to sufficiently cover the anti-slip particles 5, the layer thickness of the surface protective layer 4 is increased. There is a need to. FIG. 4 shows a coating image of the anti-slip particles. When the layer thickness T of the surface protective layer is increased, the surface protective layer 4 shrinks more when cured, so that the floor material 1 is more likely to warp. If the floor material is warped, it may be difficult to lay it on the floor surface, or if the side surface of the joint is exposed, it may be difficult to walk, or the joint may become dirty. In order to prevent these problems, it is desirable to provide the shape stabilizing layer 23.

The shape stabilizing layer 23 is preferably provided at a position substantially at the center of the total thickness of the floor material 1. By providing the shape stabilizing layer 23 at this position, the dimensional stability of the floor material 1 can be improved and the warp of the end portion of the floor material 1 can be prevented. Further, from the viewpoint of effectively suppressing warpage due to curing shrinkage of the surface protective layer 4, it is preferable to provide two or more shape stabilizing layers. FIG. 3 shows an example of an embodiment in which the shape stabilizing layer is two or more layers. In the example shown in FIG. 3, the shape stabilizing layer 23 is composed of two layers, a first shape stabilizing layer 231 and a second shape stabilizing layer 232, and the first resin layer sandwiches the shape stabilizing layers 231 and 232. 221 and the second resin layer 222 and the third resin layer 223 are laminated. For example, the distance between the first shape stabilizing layer 231 and the second shape stabilizing layer 232 is 1.0 to 2.0 mm, preferably 1.2 to 1.6 mm. In order to suppress the warp of the floor material, the first shape stabilizing layer 231 is located slightly below the center of the entire thickness of the floor material, and the two layers of the second shape stabilizing layer 232 are the floor material. It is preferably located above the center of the total thickness.

Examples of the shape stabilizing layer 23 include non-woven fabrics and woven fabrics. The material of the fiber constituting the non-woven fabric or the woven fabric is not particularly limited, and examples thereof include synthetic resin fiber, inorganic fiber, and natural fiber. Examples of the synthetic resin fiber include polyester and polyolefin, examples of the inorganic fiber include glass and carbon, and examples of the natural fiber include pulp and the like. From the viewpoint of dimensional stability, a glass sheet containing glass fiber is preferably used, and as the glass sheet, for example, a glass fiber non-woven fabric such as a glass mat or a glass fiber woven fabric such as a glass cloth is preferable. The fiber material may be used alone or may be used in combination of two or more, such as a mixture of glass fiber and pulp. The texture of the non-woven fabric or woven fabric is not particularly limited, but is preferably 10 g / m ² or more, more preferably 20 g / m ² or more, and moderate flexibility from the viewpoint of improving the dimensional stability of the floor material. From the viewpoint of ensuring processability, 100 g / m ² or less is preferable, and 50 g / m ² or less is more preferable. That is, the basis weight of the non-woven fabric or woven fabric is preferably 10 to 100 g / m ² , more preferably 20 to 50 g / m ² .

In the glass fiber nonwoven fabric, a plurality of glass fibers are randomly overlapped or entangled in the vertical direction (thickness direction), and they are bound by a binder such as an adhesive or are bound to each other to form a layer. Or, a plurality of glass fibers are vertically overlapped or entangled with a certain degree of regularity, and they are bound by a binder such as an adhesive or are bound to each other to form a layer. ..

As the binder, a binder having high bondability to glass fiber is preferable, and a binder having high bondability to glass fiber and a bonding resin described later is more preferable. Examples of such a binder include a one-component adhesive, a two-component adhesive, a thermosetting adhesive, a hot melt adhesive, an electron beam curable adhesive such as an ultraviolet curable adhesive, and the like. .. Specifically, one kind or a mixture of two or more kinds selected from urethane-based resin, vinyl acetate-based resin, styrene-butadiene copolymer-based, acrylic-based resin, vinyl chloride-based resin and epoxy-based resin is exemplified. The thickness of the glass fiber is, for example, 5 μm to 30 μm in diameter, preferably 8 μm to 20 μm in diameter, and the length is, for example, 10 mm to 30 mm.

The basis weight of the glass sheet is not particularly limited, but is preferably 10 g / m ² to 100 g / m ² , and more preferably 20 g / m ² to 50 g / m ² . If the thickness or basis weight of the glass sheet is too small, the tensile strength and dimensional stability of the floor material 1 cannot be sufficiently improved, while if it is too large, the bonding resin may not sufficiently spread into the openings of the glass sheet. There is. The density of the glass sheet is not particularly limited, but is, for example, 0.1 g / cm ³ to 0.5 g / cm ³ .

Glass sheets such as the glass fiber non-woven fabric and the glass fiber woven fabric have innumerable openings between the glass fibers. Conceptually, the gaps between the adjacent glass fibers are continuously connected in the thickness direction of the glass sheet.

Since the glass sheet has innumerable openings, a ventilation path leading from the front surface side to the back surface side of the glass sheet is secured in the surface of the glass sheet. When the opening ratio of the glass sheet is large, the air permeability of the glass sheet is high, and conversely, when the opening ratio is small, the air permeability of the glass sheet is low. In the present specification, the aperture ratio is evaluated by measuring the air permeability of the glass sheet in consideration of such a point. The aperture ratio refers to the total area of openings occupied per unit area of the surface of the glass sheet.

In order to improve the bondability, it is preferable to use a glass sheet having a high air permeability, that is, a glass sheet having a relatively large aperture ratio. On the other hand, in order to impart the strength and dimensional change suppressing effect of the glass sheet to the floor material 1, there is a certain upper limit to the opening ratio of the glass sheet. From this point of view, the air permeability of the glass sheet is preferably 100 ml / cm ² · sec to 550 ml / cm ² · sec, and more preferably 200 ml / cm ² · sec to 450 ml / cm ² · sec. ..

The air permeability of the glass sheet is in a state where three glass sheets to be measured are stacked using a Frazier type air permeability tester manufactured by Toyo Seiki Seisakusho Co., Ltd. according to the air permeability test method of JIS L 1096. It is a value measured by. The reason for measuring in a state where three sheets are stacked is that in the case of a glass sheet having a suitable aperture ratio, the air permeability is too high. This is because it may be difficult to measure.

Further, when the so-called "glass sheet with resin" in which the bonding resin is adhered to the glass sheet is used for the shape stabilizing layer 23, the layers adjacent to the back surface and the front surface thereof are formed through the bonding resin of the glass sheet glass sheet. It is preferable because it can be firmly joined. The bonding resin may be attached to the entire surface of the glass fiber, or may be attached to the entire surface of many glass fibers and to a part of the surface of the remaining glass fiber. Further, the bonding resin may be uniformly adhered to the surface of the glass fiber, or may be non-uniformly adhered to the surface of the glass fiber.

The preferable range of the air permeability of the glass sheet with resin is smaller than that without resin, and the specific numerical value is preferably 80 ml / cm ² · sec to 500 ml / cm ² · sec, more preferably 100 ml / cm. It is preferable to set it in the range of ^2.sec to 400 ml / cm ^2.sec .

The bonding resin of the glass sheet with resin is not particularly limited as long as it is bonded to either the glass fiber or the resin layer in contact with the glass fiber, and a conventionally known resin can be used. Specifically, it is desirable to use a resin of the same type as the resin layer in contact with the glass fiber, and when the resin layer in contact with the glass fiber contains a vinyl chloride resin as the main component resin, it is preferable to contain a vinyl chloride resin. ..

The thickness of the shape stabilizing layer 23 is not particularly limited, but is preferably 0.1 mm or more from the viewpoint of suppressing warpage of the floor material and improving dimensional stability, and the thickness of the floor material is thick. From the viewpoint of preventing the amount of the resin component contained in the floor material from becoming too small, 1.0 mm or less is preferable, 0.8 mm or less is more preferable, and 0.7 mm or less is further preferable. That is, the thickness of the shape stabilizing layer is preferably 0.1 to 1.0 mm, more preferably 0.1 to 0.8 mm, and even more preferably 0.1 to 0.7 mm. When the shape stabilizing layer 23 is a glass sheet with a resin, the size is not limited to this, and may be, for example, 0.4 to 1.0 mm.

As described above, the layer thickness T of the surface protective layer 4 needs to be a sufficient layer thickness to cover the anti-slip particles 5. However, as the layer thickness T of the surface protective layer 4 is increased, the shrinkage force of the surface protective layer 4 increases, so that the floor material 1 tends to warp. In particular, if the particle diameter of the anti-slip particles 5 is increased in order to provide a floor material having excellent anti-slip properties, the layer thickness T of the surface protective layer 4 needs to be increased, so that the floor material 1 is more likely to warp. By forming the shape stabilizing layer 23 of the floor material 1 as described above, the layer thickness T of the surface protective layer 4 of the present invention is set to a sufficient layer thickness for covering the anti-slip particles. However, it is possible to suppress the warp of the floor material 1 and maintain the flatness. Generally, in the case of a normal floor material constructed with an adhesive, the floor material is fixed to the floor surface with an adhesive, so that the warp of the floor material can be suppressed. However, in the case of a simple flooring material that is constructed with an adhesive, it is difficult to suppress the warp of the flooring material with an adhesive. As a result, dirt accumulates and the antifouling property is inferior. Since the floor material 1 provided with the shape stabilizing layer 23 can suppress warpage, it can be suitably used not only as a floor material constructed with a normal adhesive but also as a simple flooring material.

The decorative layer 24 is a layer for imparting design to the floor material 1. The decorative layer 24 is preferably provided on the front side of the floor material main body 2. The decorative layer 24 is not particularly limited as long as it imparts design, but is formed of, for example, a thermoplastic resin and has a design print transferred to the surface thereof, or is colored. Is preferable. Examples of the thermoplastic resin include vinyl chloride resin, olefin resin, vinyl acetate resin, acrylic resin, amide resin, ester resin, various elastomers, rubber and the like, and vinyl chloride resin is preferable from the viewpoint of adhesion to the surface layer 3.

The surface layer 3 is a layer that imparts durability, abrasion resistance, scratch resistance, and the like to the floor material 1. The surface layer 3 is for preventing the floor material main body 2 from being worn when the surface protective layer 4 is worn and for making it difficult for the surface protective layer 4 to be peeled off. The surface layer 3 is not particularly limited, but is formed of, for example, a thermoplastic resin and a plasticizing agent, and the thermoplastic resin includes vinyl chloride resin, olefin resin, vinyl acetate resin, acrylic resin, amide resin, and ester. Examples thereof include resins, various elastomers, and rubbers, and vinyl chloride resins are preferable from the viewpoints of flexibility, processability, durability, and cost. As the vinyl chloride resin, a paste vinyl chloride resin, a suspension vinyl chloride resin and the like are used. The thermoplastic resin may be used alone or in combination of two or more. As the plasticizer, a benzoic acid ester-based plasticizer, a phthalate ester-based plasticizer, and the like are used. The plasticizer may be used alone or in combination of two or more.

The surface protective layer 4 is a layer located on the outermost side of the floor material 1 and is a layer that protects the floor material main body 2. The surface protective layer 4 may be transparent or opaque, but is preferably transparent in order to make the design such as the decorative layer 24 provided on the back surface side of the surface protective layer 4 visible. The surface protective layer 4 preferably has a layer thickness of 2 to 50 μm, preferably 5 to 35 μm, because the entire surface protective layer is not brittle and has excellent impact resistance while exhibiting scratch resistance. Is more preferable. In particular, when the layer thickness is 3 μm or more, sufficient scratch resistance can be obtained, and when the layer thickness is 35 μm or less, the rigidity of the entire floor material does not become too high, it is difficult to crack, and workability is easy.

In the present invention, the surface protective layer 4 contains a cured product of an ionizing radiation curable resin composition, and the ionizing radiation curable resin composition is an ionizing radiation curable silicon-modified urethane (meth) acrylate resin and an ionizing radiation curable resin. It contains at least one selected from a fluorine-modified urethane (meth) acrylate resin and anti-slip particles.

The ionizing radiation curable resin used for the surface protective layer 4 of the present invention has an energy quantum capable of cross-linking and polymerizing a monomer or the like in a charged particle beam or an electromagnetic wave, that is, irradiating with an electron beam or an ultraviolet ray. This refers to a crosslinked and cured resin, which can be obtained by irradiating an ionizing radiation curable resin composition with an electron beam or light by a known method. The ionizing radiation curable resin is, for example, a resin in which a curable monomer or oligomer is cured by ionizing radiation. The curable monomer or oligomer is not particularly limited as long as it can be cured by ionizing radiation, and the curable monomer has characteristics such as hardness, gloss, and stain resistance required for the surface protective layer 4. , Conventionally known monofunctional monomers, bifunctional monomers, trifunctional or higher polyfunctional monomers suitable for coating can be used alone or in combination of two or more. The curable oligomer has characteristics such as hardness, gloss, and stain resistance required for the surface protective layer 4, and is suitable for coating with bisphenol A type, novolak type, and polybutadiene type epoxy (meth) acrylates. Oligomers such as polyether type urethane (meth) acrylates can be used alone or in combination of two or more. Since a relatively strong surface protective layer 4 can be formed and is versatile, it is preferable to use a curable monomer or oligomer that is cured by ultraviolet rays.

Examples of the curable monomer or oligomer include a monomer or oligomer having a polymerizable unsaturated bond group such as a (meth) acrylate group or a (meth) acryloyloxy group or an epoxy group in the molecule.

Specific examples of the curable monomer include styrene-based monomers such as α-methylstyrene, methyl (meth) acrylate, -2-ethylhexyl (meth) acrylate, dipentaerythritol hexa (meth) acrylate, and dipentaerythritol penta. Examples thereof include (meth) acrylate, urethane (meth) acrylate, and a polyol compound having two or more thiol groups in the molecule. Specific examples of the curable oligomer include urethane (meth) acrylate, polyester (meth) acrylate, epoxy (meth) acrylate, and Iso-inorganic hybrid (meth) obtained by condensing colloidal siri force and (meth) acryloyl alkoxysilane. ) Monofunctional (meth) acrylate or polyfunctional (meth) acrylate having a polymerizable unsaturated bond such as acrylate, unsaturated polyester, epoxy and the like can be mentioned.

Among these, urethane can be formed as a flooring material 1 having appropriate flexibility, excellent heat resistance, chemical resistance, and durability, and further excellent in adhesion to the flooring material main body 2. It is preferable to use (meth) acrylate.

The molecular weight of the curable monomer or oligomer is not particularly limited, and examples thereof include the range of 200 to 10,000.

The ionizing radiation curable resin composition used in the present invention is selected from a curable resin obtained by polymerizing an ionizing radiation curable silicon-modified urethane (meth) acrylate resin and an ionizing radiation curable fluorine-modified urethane (meth) acrylate resin. It is formed by containing at least one kind of anti-slip particles and, if necessary, other components. Examples of other components include an ionizing radiation curable resin not modified with silicon, an ionizing radiation curable resin not modified with fluorine, a polymerization initiator, and various other additives. As the resin that can be cured by ionizing radiation, it is preferable to use a photocurable resin, and it is more preferable to use an ultraviolet curable resin because of its good processability and versatility.

For example, when an ionizing radiation curable silicon-modified urethane (meth) acrylate resin and an ionizing radiation curable resin not silicon-modified are mixed and used, a photocurable resin or an ultraviolet curable resin is selected for both. This is preferable because it is excellent in workability during manufacturing. The same applies to the case where the ionizing radiation curable fluoromodified urethane (meth) acrylate resin and the ionizing radiation curable resin not fluorinated are mixed and used.

Since the ionizing radiation curable silicone-modified urethane (meth) acrylate resin is silicon-modified, it does not bleed out and can be firmly bonded to anti-slip particles, suppresses peeling after curing, and is used as a flooring material. Has excellent durability.

The ionizing radiation curable silicon-modified urethane (meth) acrylate resin and the ionizing radiation curable fluoromodified urethane (meth) acrylate resin can contain one or more functional groups that can be used for the curing reaction, and preferably contain two or more functional groups. Can be done. In particular, it can be a bifunctional or higher functional (meth) acrylate. The polyfunctional (meth) acrylate can contain an epoxy group, a hydroxy group, an amino group, a sulfonic acid group or an isocyanate group.

The combined content of the curable resin obtained by polymerizing the ionizing radiation curable silicon-modified urethane (meth) acrylate resin and the ionizing radiation curable fluoromodified urethane (meth) acrylate resin is 0.1 mass by mass in the ionizing radiation curable resin composition. % To 5% by mass is preferable, and 0.3% by mass to 3% by mass is more preferable. Antifouling property can be ensured when it is 0.1% by mass or more, and anti-slip property of the floor material is not impaired when it is less than the quality weight%.

Further, as the polymerizable monomer of the ionized radiation curable fluoromodified urethane (meth) acrylate resin and the ionized radiation curable fluoromodified urethane (meth) acrylate resin, a (meth) acrylate simple substance having a radically polymerizable unsaturated group in the molecule is used. It is preferable to use a weight because the polymerizable property is good.

The ionizing radiation curable silicon-modified urethane (meth) acrylate resin is one of the ionizing radiation curable silicon-modified urethane (meth) acrylate resins having a (meth) acrylic group introduced at one or both ends of polysiloxane. The ionized radiation curable silicon-modified urethane (meth) acrylate resin is, for example, an ionized radiation curable polysiloxane-based urethane (meth) acrylate resin, in which the functional group in the polysiloxane and the functional group in the urethane (meth) acrylate resin are present. A chemical reaction and bond. The (meth) acrylic group preferably has 1 to 6 groups, and is roughly classified into a side chain type, a double-ended type, a single-ended type, and a side-chain double-ended type depending on the bonding position of the organic group to be substituted. The bonding position of the organic group is not particularly limited.

As the silicon-modified urethane (meth) acrylate resin used in the present invention, an ionizing radiation curable polysiloxane-based urethane (meth) acrylate resin is suitable, and one or more polydialkylsiloxane-based urethane (meth) acrylates are suitable. Can be used. It is preferably a polydimethylsiloxane-based urethane (meth) acrylate, which is synthesized by reacting isocyanates with silicone polyols and hydroxyalkyl (meth) acrylates, and has an acryloyl group (CH ₂ =) as a functional group in the molecule. It has a CH-CO-) or methacryloyl group (CH ₂ = C (CH ₃ ) -CO-), and has a urethane bond (-NH-COO-) and a polydialkylsiloxane bond, preferably a polydimethylsiloxane bond (-(-(-). It has -Si (CH ₃ ) ₂ -O-) n-). These can be synthesized by a known method. In the present invention, "(meth) acrylate" is a general term for acrylate and methacrylate.

On the other hand, the fluorine-modified (meth) acrylate used in the present invention can be produced by reacting a compound having a perfluoro group with the (meth) acrylate. For example, the curable fluorocompound is a perfluoro group such as a perfluoro polyol, a perfluoropolyether polyol, a perfluoropolyether dibasic acid having a carboxylic acid, a perfluoropolyether epoxy compound having an epoxy group, and the like. A polyfunctional compound formed by reacting a compound having a carboxylic acid with a polyfunctional (meth) acrylate such as a modified (meth) acrylate having a carboxylic acid, a (meth) acrylate having an epoxy group, and a (meth) acrylate having an isocyanate group. (Meta) acrylates, 2- (perfluorodecyl) ethyl (meth) acrylate, 3-perfluorooctyl-2-hydroxypropyl (meth) acrylate, 3- (perfluoro-9-methyldecyl) -1,2- It can contain oligomers or prepolymers such as epoxide propane, (meth) acrylic acid-2,2,2-trifluoroethyl, (meth) acrylic acid-2-trifluoromethyl.

The ionized radiation curable silicon-modified urethane (meth) acrylate resin and the ionized radiation curable fluoromodified urethane (meth) acrylate resin used in the present invention are simultaneously cured and integrated when the ionized radiation curable resin composition is cured. To form a photocurable resin layer with high surface hardness. Therefore, it is possible to obtain a good and continuous antifouling surface without bleeding out of silicon or fluorine on the surface. Further, since these modified urethane (meth) acrylate resins have urethane bonds in the molecule, they have appropriate toughness due to hydrogen bonds and are excellent in bending resistance required for floor materials.
Further, it is possible to impart slipperiness to the surface of the surface protective layer 4 of the present invention and improve scratch resistance and the like. At the same time, the problem of slipperiness arises.

As the ionizing radiation curable resin not modified with silicon and the ionizing radiation curable resin not modified with fluorine, conventionally known ones can be used. These ionizing radiation curable resins contain an electron radiation curable, curable resin obtained by polymerizing at least one of a monomer and an oligomer, which is cured by ionizing radiation, and if necessary, contain other components. But it may be.

Examples of the ionizing radiation curable monomer or oligomer include a monomer or oligomer having a polymerizable unsaturated bond group or epoxy group such as a (meth) acrylate group and a (meth) acryloyloxy group in the molecule. .. Specific examples of the ionizing radiation curable monomer include styrene-based monomers such as α-methylstyrene, methyl (meth) acrylate, -2-ethylhexyl (meth) acrylate, dipentaerythritol hexa (meth) acrylate, and dipentaerythritol. Examples thereof include penta (meth) acrylate, urethane (meth) acrylate, and polyol compounds having two or more thiol groups in the molecule. Specific examples of the ionizing radiation curable oligomer include acrylates such as urethane (meth) acrylate, polyester (meth) acrylate, and epoxy (meth) acrylate; unsaturated polyester; and epoxy. These ionizing radiation curable monomers or oligomers can be used alone or in combination of two or more. It is preferable to use a curable monomer or oligomer that is cured by ultraviolet rays because it is versatile and has excellent processability.

In particular, as the ionizing radiation curable monomer or oligomer, it is preferable to use a monomer or oligomer having a (meth) acrylate group in the molecule, and further preferably, urethane (meth) acrylate is used.

The molecular weight of the ionizing radiation curable monomer or oligomer is not particularly limited, but is preferably in the range of, for example, 200 to 10000.

Ionizing radiation curable monomers or oligomers are usually used with the addition of a polymerization initiator. Examples of the polymerization initiator include 2,2-dimethoxy-2-phenylacetophenone, acetophenone, benzophenone, xanthone, 3-methylacetophenone, 4-chlorobenzophenone, 4,4'-dimethoxybenzophenone, benzoinpropyl ether, and benzyldimethylketal. , N, N, N', N'-tetramethyl-4,4'-diaminobenzophenone, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropane-1-one, other thioxanth-based compounds, etc. However, it can be mentioned.

The anti-slip particles 5 are particles that impart anti-slip properties to the surface protective layer 4, and when blended with the surface protective layer 4, fine irregularities are generated on the surface of the surface protective layer 4 and the particles are placed on the surface protective layer 4. The soles of the feet are less slippery. As the anti-slip particles 5, for example, one kind or two or more kinds of inorganic particles can be used. Examples of the inorganic particles include powders and granules such as silica, alumina, glass, calcium carbonate, barium sulfate, zirconium oxide, silicon nitride, silicon carbide, zeolite, silas balloon, diatomaceous earth, silicon dioxide, and diamond, and have durability and cost. From the viewpoint of the above, alumina is preferable. It is preferable that the floor material 1 of the present invention does not contain photocatalytic particles in the surface protective layer 4. The photocatalytic particles are composed of titanium oxide, zinc oxide, tin oxide, iron oxide, copper oxide and the like having a photoactive action, and are particles that generate active oxygen such as hydrogen peroxide and hydroxyl radical. The floor material 1 of the present invention is oxidized and decomposed by the active oxygen generated by the photocatalytic particles to reduce the durability, the anti-slip particles 5 are easily peeled off from the surface protective layer 4, and the antifouling property and the anti-slip property are deteriorated. It will be easier to do. Therefore, the content of the photocatalytic particles in the ionizing radiation curable resin composition is preferably 4% by mass or less, more preferably 3% by mass or less.

Examples of the shape of the anti-slip particles 5 include a spherical shape such as an ellipsoid or a sphere, a polygonal shape, a scaly shape, an amorphous shape, and the like. It is preferable from. The average particle size of the anti-slip particles 5 is preferably 2 μm to 100 μm, more preferably 5 μm to 80 μm, and further preferably 15 μm to 60 μm. The ratio (particle diameter μm / thickness μm) between the average particle size of the anti-slip particles 5 and the thickness of the surface protective layer 4 is preferably 0.1 from the viewpoint of imparting anti-slip properties but not impairing antifouling properties. It is -10, more preferably 0.5-5, and even more preferably 0.8-3. The average particle size of the anti-slip particles 5 in the present specification refers to those measured by particle size distribution measurement by a laser light diffraction method. As a result, fine irregularities are formed on the surface of the surface protective layer 4, and both antifouling property and anti-slip property can be achieved at the same time.

Further, as shown in FIG. 4, the anti-slip particles 5 are preferably embedded in the surface protective layer 4 from the viewpoint of antifouling property, and even in the convex portion, the surface of the anti-slip particles 5 is surfaced. It is preferable to form a covering portion 5a in which the protective layer 4 is thinly covered. When the anti-slip particles 5 are exposed from the surface protective layer 4, dirt is likely to adhere to the exposed portion, and the antifouling property is deteriorated. For example, the thickness of the covering portion 5a is 1 μm to 10 μm, preferably 4 to 8 μm. If the thickness of the covering portion 5a is smaller than the lower limit value, the covering portion 5a is likely to be peeled off, and if it is larger than the upper limit value, it becomes difficult for the anti-slip particles 5 to form irregularities.

The content of the anti-slip particles 5 in the ionizing radiation curable resin composition is preferably 5 to 60% by mass, more preferably 10 to 45% by mass, still more preferably, from the viewpoint of processability such as viscosity. It is 12 to 30% by mass. The content of the anti-slip particles 5 refers to the total amount when two or more kinds of anti-slip particles 5 are used.

It is preferable that an ionizing radiation polymerization initiator is added to the ionizing radiation curable resin composition. Examples of the ionizing radiation polymerization initiator include a benzoin-based ionizing radiation polymerization initiator, an acetophenone-based ionizing radiation polymerization initiator, a benzophenone-based ionizing radiation polymerization initiator, and a thioxanthone-based ionizing radiation polymerization initiator.

Examples of the benzoin-based ionizing radiation polymerization initiator include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin isobutyl ether.

Examples of the acetophenone-based ionizing radiation polymerization initiator include benzyldimethylketal (also known as 2,2-dimethoxy-2-phenylacetophenone), diethoxyacetophenone, 4-phenoxydichloroacetophenone, 4-t-butyl-dichloroacetophenone, and 4-t. -Butyl-Trichloroacetophenone, 2-Hydroxy-2-methyl-1-phenylpropan-1-one, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, 1- (4- (4-) Dodecylphenyl) -2-hydroxy-2-methylpropan-1-one, 4- (2-hydroxyethoxy) -phenyl (2-hydroxy-2-propyl) ketone, 1-hydroxycyclohexylphenylketone, 2-methyl-1 -[4- (Methylthio) phenyl] -2-morpholinopropane-1 and the like can be mentioned, and benzyldimethylketal and 1-hydroxycyclohexylphenylketone are preferably used.

Benzophenone-based ionizing radiation polymerization initiators include benzophenone, benzoylbenzoic acid, methyl benzoylbenzoate, 4-phenylbenzophenone, hydroxybenzophenone, acrylicized benzophenone, 4-benzoyl-4'-methyldiphenylsulfide, 3,3'-dimethyl. -4-Mester benzophenone and the like can be mentioned.

Examples of the thioxanthone-based ionizing radiation polymerization initiator include thioxanthone, 2-chlorthioxanson, 2-methylthioxanson, 2,4-dimethylthioxanson, isopropylthioxanson, 2,4-dichlorothioxanson, 2, Examples thereof include 4-dichloromethane and 2,4-diisopropylthioxanson.

The ionizing radiation polymerization initiator is used in a proportion of 0.1 to 10 parts by mass, preferably 1 to 8 parts by mass, and more preferably 2 to 6 parts by mass with respect to 100 parts by mass of the entire ionizing radiation curable fat composition. Be done.

In addition, the ionizing radiation curable resin composition may optionally contain an additive as long as it does not impair the object of the present invention, and the additive may include a solvent, a leveling agent, and anti-slip particles. Fine particles, fillers, dispersants, plasticizers, UV absorbers, surfactants, antioxidants, thixotropic agents, polymerization inhibitors, reactive diluents, non-reactive diluents, matting agents, defoaming agents, Examples thereof include a sedimentation inhibitor, a heat stabilizer, a (meth) acrylate-based monomer, and a composition containing a curable resin.

Examples of the solvent include alcohols, ketones, esters, ethers, glycols, cellosolves, aliphatic hydrocarbons, aromatic hydrocarbons and the like. The solvent may be used alone or in combination of two or more.

Specific examples of the (meth) acrylate-based monomer used in the present invention as necessary include an ester of an alkylene polyol or a polyether polyol having a low polymerization rate and a (meth) acrylic acid, and 1,4-butane. Didiol diacrylate, 1,6-hexanediol diacrylate, neopentyl glycol diacrylate, 2 (2-ethoxyethoxy) ethyl acrylate, tetrahydrofurfuryl acrylate, 2-phenoxyethyl acrylate, diethylene glycol diacrylate, tetraethylene glycol diacrylate, Examples thereof include 1,3-butylene glycol diacrylate, tripropylene glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate, and neopentyl glycol diacrylate hydroxypivalate.

The ionizing radiation curable resin composition of the present invention is applied onto the floor material main body 2 of the floor material 1 using a coating machine such as a rubber or sponge roll coater, a spray, or a vacuum coater, and an electron beam or light is applied to the coated surface. By irradiating, preferably, ultraviolet rays to cure the wet coating film, a cured coating film (coating film) having excellent stain removing properties can be obtained. The number of times the ionizing radiation curable resin composition of the present invention is applied is not particularly limited and may be once or twice or more.

Irradiation of this ionizing radiation can be performed by a conventionally known irradiation method. For example, the coating film can be cured by irradiating with an electron beam under the conditions of 200 kV and 3 to 10 mad. Further, the light of light irradiation is ultraviolet rays or visible light, and the light irradiation can be performed by a conventionally known irradiation method. For example, a high-pressure mercury lamp has one lamp of 80 to 120 W / cm and a belt speed of 5 to 20 m / min, and the belt speed can be increased by increasing the number of lamps. Further, by increasing the capacity of W / cm, the belt speed can be increased.

The hardness of the surface protective layer 4 can be evaluated by the pencil hardness of the ionizing radiation curable resin composition used for forming the surface protective layer 4 applied on a glass plate with a film thickness of 25 μm and cured. From the viewpoint of durability, scratch resistance, and impact resistance, it is preferably 6B to 4H. The pencil hardness is measured according to the pencil hardness test (JIS K 5600-5-4).

The hardness of the surface protective layer 4 is realized by appropriately designing the cross-linking density of the ionizing radiation curable resin composition and the like, and it is preferable that the cross-linking density is such that the above-mentioned hardness is obtained.

The surface roughness of the surface protective layer 4 is preferably the following Ra, Ry, and Rpk values from the viewpoint of having both anti-slip property and anti-fouling property. Ra is preferably 1.85 to 13, more preferably 1.9 to 8, and even more preferably 1.9 to 5. Ry is preferably 9 to 70, more preferably 10 to 50, and even more preferably 10 to 30. The Rpk is preferably 2 to 30, more preferably 3 to 20, and even more preferably 3.5 to 12. The surface roughness in the present specification is calculated from the one measured by the surface roughness measuring machine according to JIS B0601-1994. When each value of Ra, Ry, and Rpk is at least the lower limit value, the antifouling property can be enhanced, and when it is at least the upper limit value, there is no discomfort in walking and the anti-slip property is good.

The surface protective layer 4 may be embossed from the viewpoint of imparting anti-slip properties. The embossing process is performed in order to impart a desired uneven shape to the surface of the floor material 1. For example, after the surface protective layer 4 is heat-softened, it is pressed and shaped with an embossed plate having a desired uneven shape, and then cooled and fixed to give a texture. The embossing can be performed by a known single-wafer or rotary embossing machine. The uneven shape of the embossing is not particularly limited, and for example, a wood grain conduit groove, a floating pattern (an uneven pattern of an embossed annual ring), a hairline, a sand grain, a satin finish, and other fixed convex parts (not shown) are regular. Alternatively, there are those in which the irregularly arranged protrusions and those in which the irregular convex portions are projected in an irregular arrangement, etc., but from the viewpoint of imparting anti-slip properties, the directionalness of sand grain or satin finish is given. It is preferable to use a pattern without a pattern because the anti-slip property can be uniformly exhibited in any direction. The embossing depth is, for example, 0.01 to 0.5 mm, more preferably 0.05 mm to 0.3 mm, still more preferably 0.1 mm to 0.2 mm, from the viewpoint of imparting anti-slip properties. ..

The surface protective layer 4 may be transparent or opaque, but it is preferable that the surface protective layer 4 is transparent enough to visually recognize the design of the floor material main body 2.

The thickness T of the surface protective layer 4 is not particularly limited, but is preferably 5 to 150 μm, more preferably 10 to 70 μm, and even more preferably 15 to 40 μm. In the present specification, the thickness of the surface protective layer does not include the thickness of the portion raised by the anti-slip particles 5, as shown in FIG.

[Preparation of ionizing radiation curable resin composition]
Examples 1-8
The aluminas shown in Tables 4 to 6 in the ionizing radiation curable resin "UV No. 119LT-DX (manufactured by China Paint Co., Ltd.)" containing an ionizing radiation curable silicon-modified urethane (meth) acrylate resin are listed in Tables 4 to 6. The ionizing radiation curable resin composition was prepared by adding so as to have a mass ratio of.

Comparative Example 1
Ionizing radiation curable urethane (meth) acrylate resin that does not contain ionizing radiation curable silicon-modified urethane (meth) acrylate resin and ionizing radiation curable fluorine-modified urethane (meth) acrylate resin "UV No. 146B (manufactured by China Paint Co., Ltd.)" Was used as an ionizing radiation curable resin composition.

Reference example 1
Ionizing radiation curable urethane (meth) acrylate resin that does not contain ionizing radiation curable silicon-modified urethane (meth) acrylate resin and ionizing radiation curable fluorine-modified urethane (meth) acrylate resin "UV No. 118LT (manufactured by China Paint Co., Ltd.)" Was used as an ionizing radiation curable resin composition.

Comparative Example 2
It was prepared in the same manner as in Example 2 except that alumina was not added.

Reference example 2
Instead of the ionizing radiation curable resin "No. 119LT-DX (manufactured by China Paint Co., Ltd.)" containing an ionizing radiation curable silicon-modified urethane (meth) acrylate resin, an ionizing radiation curable silicon-modified urethane (meth) acrylate resin and It was prepared in the same manner as in Example 2 except that the ionizing radiation curable urethane (meth) acrylate resin "U1102 (manufactured by Dainichi Seika Co., Ltd.)" containing no ionizing radiation curable fluoromodified urethane (meth) acrylate resin was used.

[Making flooring]
Examples 1, 2, 3, 4, 5, 8, Comparative Examples 1, 2, Reference Examples 1, 2
A flooring intermediate product excluding the surface protective layer from the composition table 1 was prepared by applying heat and pressure by a known method, and a mirror surface or embossing was pressed on the surface of the flooring material intermediate product. Here, pressing the mirror surface means pressing with a mirror-shaped flat plate or roll, and pressing embossing means pressing with a plate or roll on which unevenness is formed. Next, the ionizing radiation curable resin composition prepared as described above is applied on the surface layer of the flooring intermediate product to a uniform thickness by the natural roll coating method, and then immediately irradiated with ultraviolet rays in the air with an electrodeed ultraviolet lamp. As a result, a surface protective layer was formed. Two types of samples, mirror-finished and embossed, were prepared for Examples 2 to 5 and Comparative Example 2, and mirror-finished for Examples 1 and 8, Comparative Example 1, and Reference Examples 1 and 2. The basis weight of the glass sheet used in Table 1 was 30 g / m ² , the air permeability was 299 ml / cm ² · sec, and the embossing depth in the embossing finish was 0.1 mm. The air permeability is a value measured by stacking three glass sheets.

Example 6
A flooring material was produced in the same manner as in Example 8 except that the configuration was changed from Table 1 to Table 2. However, the flooring material of Example 6 is a reference example.

Example 7
A flooring material was produced in the same manner as in Example 8 except that the configuration was changed from Table 1 to Table 3. The glass sheet used in Table 3 is the same as that used in Table 1.

<BHM test>
The flooring materials of Example 1, Comparative Example 1, and Reference Example 1 were cut into a rectangular shape of length × width = 18 cm × 28 cm, and three samples were prepared for each. The surface of the three samples opposite to the surface protective layer was attached to the inner wall of a cubic hollow container having a length × width × height = 52 cm × 52 cm × 45 cm. In this hollow container, put 6 pieces of cubic rubber pieces with vertical and horizontal height = 5 cm x 5 cm x 5 cm, rotate this container clockwise for 15 minutes (rotation speed: 63 rotations / minute), and then counterclockwise. It was rotated around for 15 minutes (rotation speed: 63 rotations / minute). After the rotation was stopped, the sample was taken out, the state of dirt on the surface was visually observed, and a photograph was taken.
Next, wipe the surface of each sample with a dry paper (dry wipe) and with water wet with a paper wipe (water wipe) until the dirt is wiped off (those that cannot be wiped within 10 minutes are wiped off). It is not possible.) And the state of dirt after wiping was visually observed and photographed.
The antifouling property and decontamination property of the surface after cleaning were visually evaluated according to the following criteria. The results are shown in Table 4. In addition, FIG. 5 shows the states of each example immediately after the test and after wiping.
◎: Heel mark is not attached ○: Heel mark is attached but can be wiped off in a short time with paper or water wipe △: Heel mark is attached but can be wiped off with paper or water wipe ×: Paper wipe・ Slight heel marks remain even after wiping with water

<Anti-slip property>
With respect to the floor materials of Examples 2 to 5, Comparative Example 2 and Reference Example 2, the sensory evaluation of slipperiness was carried out with various shoes shown in Table 5. As for the test results, the average value was calculated from the measurement results of 8 persons based on the following criteria. The results are shown in Table 5. In the table, "dry" refers to the anti-slip property of the sample in a dry state, and "water" refers to the anti-slip property in a wet state in which water is evenly sprayed on the surface of the sample.
1: Slippery
2: Slightly slippery 3: Slightly slippery 4: Slightly slippery 5: Non-slip

<Warp test>
With respect to the flooring materials of Examples 6 to 8, warpage was measured using flooring materials having dimensions of 450 mm × 450 mm in Examples 6 and 7 and 500 mm × 500 mm in Example 8. The warp was measured at 5 ° C, 23 ° C, and 35 ° C in accordance with JIS A1454 14. Specifically, the sample is placed on a polished glass plate with the surface facing up, and the sample is prepared by allowing it to stand in a constant temperature room (5, 23, 35 ± 2 ° C., humidity 50 ± 10%) for 24 hours to prepare the polished glass. It was placed on a plate, and the warp value was measured using a loupe with a 1/10 mm scale for the gap between the four corners of the sample and the glass plate, and the average value was taken as the warp value. A positive value of the warp value indicates a value in which the end portion is warped upward (upward warp value), and a negative value indicates a value in which the end portion is warped downward (downward warp value). The results are shown in Table 6.

<Surface roughness>
For Examples 2 to 5, Comparative Example 2, and Reference Example 2, the surface roughness was measured under the following conditions using a surface roughness measuring machine (Surfcom 130A (manufactured by Tokyo Seimitsu Co., Ltd.)) according to JIS B0601-1994. did. The values of Ra, Ry, and Rpk are obtained by calculating the values in the vertical direction and the horizontal direction of the sample, respectively, and calculating the average value. Furthermore, the antifouling property and the decontamination property were evaluated based on the same criteria as described above. The results are shown in Table 7. In addition, in the anti-slip property evaluation of Table 7, in the sandals and dry state of Table 5, those exceeding 3.0 are evaluated as ⊚, 2.5 to 3.0 are evaluated as ◯, and less than 2.5 are evaluated as ×.
Measurement length: 12.5 mm
Cutoff: 2.5 mm
Measurement speed: 1.5 mm / s
Measurement range: ± 40 μm (partial range over is ± 400 μm)

From Example 1, Comparative Example 1, and Reference Example 1, it can be seen that when the surface protective layer contains an ionizing radiation-curable silicone-modified urethane (meth) acrylate resin, it is excellent in antifouling property and stain-removing property. ..

From Examples 2 to 5 and Comparative Example 2, it can be seen that when the surface protective layer contains anti-slip particles, the anti-slip property is excellent.

The warp of the floor material is preferably an appropriate negative value, but when comparing Examples 6 to 8, Example 8 containing two glass sheets in the floor material body is particularly preferable.

From Table 7, Examples 2 to 5 satisfying the range of Ra of 1.85 to 13, Ry of 9 to 70, and Rpk of 2 to 30, have antifouling property, decontamination property, and antislip property. It can be seen that the balance of is good. Of these, Example 3 was particularly preferable.

The present invention is not limited to the above embodiments and examples. Various embodiments can be taken without departing from the gist of the present invention.

1 Floor material 2 Floor material body 21 Base material layer 22 Resin layer 221 1st resin layer 222 2nd resin layer 223 3rd resin layer 23 Shape stabilizing layer 231 1st shape stabilizing layer 232 2nd shape stabilizing layer 24 Cosmetics Layer 3 Surface layer 4 Surface protective layer 5 Anti-slip particles 5a Coating part T Thickness of surface protective layer

Claims (4)

A floor material main body including a resin layer and a shape stabilizing layer, and a floor material having a surface protective layer on the floor material main body, wherein the surface protective layer contains a cured product of an ionizing radiation curable resin composition. The ionizing radiation curable resin composition comprises at least one selected from an ionizing radiation curable silicon-modified urethane (meth) acrylate resin and an ionized radiation curable fluoromodified urethane (meth) acrylate resin, and anti-slip particles. The resin used for the surface protective layer is an ionizing radiation curable resin, and the surface roughness Ry of the surface protective layer is 10 or more and less than 50. Floor materials (excluding floor materials including wood). The flooring material according to claim 1, wherein the shape stabilizing layer is a glass sheet containing glass fibers. The floor material according to claim 1 or 2, wherein the floor material main body further includes a surface layer and a decorative layer, and the surface layer is made of a thermoplastic resin. The flooring material according to any one of claims 1 to 3, wherein the surface protective layer has a hardness of 6B to 4H.

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