JP7535558B2 - Flooring - Google Patents

Description

The present invention relates to flooring materials.

Conventionally, various types of flooring materials have been widely used. Among them, flooring materials containing a resin layer are easily scratched and stained when stepped on by the soles of feet or shoes. For this reason, scratch resistance and stain resistance are required as properties of flooring materials containing a resin layer. Note that scratch resistance refers to the property of making the surface of a flooring material less susceptible to scratches, and stain resistance refers to the property of making it less susceptible to staining or the property of stains being easily removable.
Ionizing radiation curable resins have excellent scratch resistance and are therefore used to cover a variety of substrates, including as coatings for the surfaces of flooring materials.

For example, Patent Document 1 discloses a floor sheet which is characterized in that it comprises a base sheet made of a non-chlorine-based thermoplastic resin, on which is disposed a pattern printed layer, one or more layers of non-chlorine-based thermoplastic resin, the surface of which is provided with a transparent resin layer which is suitable for repainting with an electron beam or ultraviolet ray curable resin, and in which consideration has been given to imparting abrasion resistance and durability, etc.

Furthermore, Patent Document 2 discloses a photocurable (meth)acrylate resin composition having excellent contamination removal properties, which is characterized by containing (A) a photocurable (meth)acrylate resin, (B) a photocurable polysiloxane-based urethane (meth)acrylate resin, (C) a photocurable silicone block (meth)acrylate resin, and (D) a photopolymerization initiator.

JP 2003-13587 A Patent No. 3945628

However, the floor sheet of Patent Document 1 does not have sufficient antifouling properties and stain removability, and further improvement is required.
Although said to have superior stain removal properties compared to conventional photocurable resin compositions, the photocurable resin composition of Patent Document 2 has high sliding properties and is not suitable for use as a flooring material that requires anti-slip properties.

An object of the present invention is to provide a flooring material which is excellent in antifouling properties and stain removability as well as in anti-slip properties.

The present invention relates to a flooring material having a flooring body including a resin layer and a surface protective layer on the flooring body, wherein the surface protective layer comprises a cured product of an ionizing radiation curable resin composition, and the ionizing radiation curable resin composition comprises at least one resin selected from an ionizing radiation curable silicone-modified urethane (meth)acrylate resin and an ionizing radiation curable fluorine-modified urethane (meth)acrylate resin, and anti-slip particles.

According to the present invention, it is possible to provide a flooring material which is excellent in antifouling properties and antifouling properties as well as in anti-slip properties.

FIG. 1 is a plan view showing one embodiment of a flooring material of the present invention. 2 is a cross-sectional view of the flooring material of FIG. 1 cut in the thickness direction. 1 is a cross-sectional view showing one embodiment of the flooring material of the present invention. This is an image of the coating of anti-slip particles. These are the test results of antifouling and stain removability.

As a result of investigating the above-mentioned problems, it was found that by using, for the surface protective layer, a cured product of an ionizing radiation curable resin composition containing at least one resin selected from an ionizing radiation curable silicone-modified urethane (meth)acrylate resin and an ionizing radiation curable fluorine-modified urethane (meth)acrylate resin, and anti-slip particles, the anti-fouling property, the stain removability, and the anti-slip property can be improved.

The mechanism by which the flooring material of the present invention has excellent anti-fouling properties and stain removability as well as excellent anti-slip properties can be presumed to be as follows: Because the flooring material of the present invention contains at least one resin selected from ionizing radiation-curable silicone-modified urethane (meth)acrylate resins and ionizing radiation-curable fluorine-modified urethane (meth)acrylate resins in an ionizing radiation-curable resin composition having excellent anti-fouling properties, the sliding properties and water- and oil-repellency of the silicone and fluorine functional groups make it difficult for staining substances to adhere to the ionizing radiation-curable resin surface, and any adhered staining substances are easy to remove.
As for the anti-slip properties, it is presumed that the anti-slip particles form fine irregularities on the surface of the surface protection layer, which sink into the soles of the feet or shoes when stepped on by a person, providing suitable anti-slip properties. Since the resin containing silicon and fluorine is ionizing radiation curable, it is firmly and integrally adhered as an ionizing radiation curable resin composition to the surface of the anti-slip particles that form fine irregularities when the ionizing radiation curable resin composition is cured. In addition, since the main component is an ionizing radiation curable resin, the anti-slip particles and the ionizing radiation curable resin composition adhered to the surface of the anti-slip particles are less likely to peel off onto the soles of the feet or shoes when a person steps on the flooring material. As a result,
It is possible to prevent both the deterioration of anti-slip properties due to the peeling of the surface of the anti-slip particles and the deterioration of antifouling properties due to the peeling of the resin containing silicon and fluorine. Moreover, unlike the case where a silicone and fluorine resin composition such as silicone oil or fluorine resin is mixed with an ionizing radiation curable resin, the deterioration of anti-slip properties due to bleeding does not occur.

The flooring material of the present invention has a flooring material body and a surface protective layer on the flooring material body. In this specification, the upper side refers to the side farther from the floor surface when the flooring material is laid on the floor surface, and is also called the front side. The lower side refers to the side closer to the floor surface when the flooring material is laid on the floor surface, and is also called 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 enlarged cross-sectional view of the flooring material cut in the thickness direction. The flooring material 1 shown in the figure is formed in a long strip shape when viewed from above. The long strip shape is a rectangle whose length in one direction is sufficiently longer than the length in the other direction (the other direction is a direction perpendicular to the one direction), for example, the length in one direction is more than twice the length in the other direction,
Preferably, the width is 4 times or more. The long strip flooring material 1 is usually wound in a roll for storage and transportation, and is cut into a desired shape at the construction site for use. However, the flooring material of the present invention is not limited to a long strip shape, and may be formed into a sheet shape such as a square shape in a plan view (not shown).

In the present invention, the flooring body 2 is the main part that determines the strength and weight of the flooring.
In the present invention, the flooring body 2 includes a resin layer 22 that contains a synthetic resin component.
The flooring body 2 may be any known material in the art as long as it includes a resin layer 22. For example, as shown in FIG. 2, the flooring body 2 may include a base material layer 21, a shape stabilizing layer 23, a decorative layer 24, and a slab 25.
4, surface layer 3, etc. may be combined in any desired manner.

The synthetic resin component of the resin layer 22 is not particularly limited, but is preferably a thermoplastic resin. Examples of the thermoplastic resin include polyvinyl chloride resin, olefin resin, polyvinyl acetate resin,
Examples of the synthetic resin include acrylic resins, amide resins, ester resins, various elastomers, rubbers, etc., and vinyl chloride resins are preferred from the viewpoints of processability, flexibility, cost, etc. The synthetic resin components may be used alone or in combination of two or more kinds.

As the vinyl chloride resin, a paste vinyl chloride resin, a suspension vinyl chloride resin, or the like is used.

The vinyl chloride paste resin is, for example, a vinyl chloride paste obtained by emulsion polymerization, and the viscosity can be appropriately adjusted by a plasticizer. The vinyl chloride paste 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 particles, and preferably the surface of the fine powder is coated with a surfactant. The average degree of polymerization of the vinyl chloride paste 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 preferably has a particle size of 20 μm to 100 μm.
The average degree of polymerization of the suspension vinyl chloride resin is 700 to 1500.
Preferably, the particle size is about 700 to 1100, more preferably about 700 to 1000. However, the particle size is the median diameter (D ₅₀ ) in the volume-based particle size distribution.
It is.

The vinyl chloride resins preferably have a K value of about 60 to 95, and more preferably have 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
It can be up to 100% by weight.

The resin layer 22 may contain any additives, such as a filler, a plasticizer, a flame retardant, a stabilizer, an antioxidant, a lubricant, a colorant, and a foaming agent.

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

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

The base layer 21 is the layer located at the bottom of the flooring material, and is intended to increase the adhesive strength with the adhesive (hereinafter referred to as floor adhesive) that adheres the flooring material to the floor surface when laid, and to suppress warping of the flooring material. The base layer 21 is not particularly limited, but may be, for example, a nonwoven fabric,
Conventionally known sheet materials such as woven fabric, paper, felt, etc. can be used. The material of the fibers constituting the nonwoven fabric or 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 dimensional changes in the flooring material due to shrinkage and expansion over time. The surface protective layer 4 of the flooring material 1 shrinks when the ionizing radiation curable resin composition is cured and molded. Because the flooring material 1 is made of resin, it is prone to warping when it shrinks, unlike flooring materials made of other materials such as wood, stone, and ceramic. Furthermore, in order to increase the stain resistance, it is desirable to coat the surface of the anti-slip particles 5 with the resin of the surface protective layer 4, and in order to sufficiently coat the anti-slip particles 5, it is necessary to make the layer thickness of the surface protective layer 4 thick. An image of the coating of the anti-slip particles is shown in Figure 4. The layer thickness T of the surface protective layer
If the thickness is increased, the surface protection layer 4 shrinks more when hardened, making the flooring material 1 more likely to warp. If the flooring material warps, it may be difficult to lay it on the floor surface, or the side of the joints may be exposed, making it difficult to walk on, or the joints may become dirty. In order to prevent these problems, it is desirable to provide a shape stabilization layer 23.

The shape stabilizing layer 23 is preferably provided at approximately the center of the overall thickness of the flooring material 1. Providing the shape stabilizing layer 23 at this position increases the dimensional stability of the flooring material 1 and prevents warping at the edges of the flooring material 1. It is also preferable to provide two or more shape stabilizing layers from the viewpoint of effectively suppressing warping due to cure shrinkage of the surface protective layer 4. An example of an embodiment having two or more shape stabilizing layers is shown in Figure 3. In the example shown in Figure 3, the shape stabilizing layer 23 comprises a first shape stabilizing layer 231.
, and a second shape stabilizing layer 232, and a first resin layer 221, a second resin layer 222, and a third resin layer 223 are laminated with the shape stabilizing layers 231, 232 sandwiched therebetween. 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, it is 1.2 to 1.6 mm. In order to suppress warping of the flooring material, it is preferable that the first shape stabilizing layer 231 is located slightly below the center of the overall thickness of the flooring material, and the two layers of the second shape stabilizing layer 232 are located above the center of the overall thickness of the flooring material.

Examples of the shape stabilizing layer 23 include nonwoven fabric and woven fabric. The material of the fibers constituting the nonwoven fabric or woven fabric is not particularly limited, but examples include synthetic resin fibers, inorganic fibers, and natural fibers. Examples of the synthetic resin fibers include polyester and polyolefin, examples of the inorganic fibers include glass and carbon, and examples of the natural fibers include pulp. From the viewpoint of dimensional stability, a glass sheet containing glass fibers is preferably used, and examples of the glass sheet include, for example, glass fiber nonwoven fabric such as glass mat, or
A glass fiber woven fabric such as glass cloth is preferable. The fiber material may be used alone or in combination with two or more materials such as a mixture of glass fiber and pulp. The basis weight of the nonwoven fabric or woven fabric is not particularly limited, but from the viewpoint of improving the dimensional stability of the flooring material, it is preferable to use a weight of 10 ...
From the viewpoint of ensuring appropriate flexibility and processability, the weight is preferably ¹⁰⁰ g/m2 or less, more preferably 50 g/ ^m2 or less. That is, the weight of the nonwoven fabric or woven ^fabric is preferably 10 to ¹⁰⁰ g/ ^m2 , more preferably 20 to 50 g/ ^m2 .

The glass fiber nonwoven fabric is formed by a plurality of glass fibers overlapping or entangling in a random manner in the vertical direction (thickness direction) and being bound by a binder such as an adhesive or by binding to themselves to form layers, or by a plurality of glass fibers overlapping or entangling in the vertical direction with a certain degree of regularity and being bound by a binder such as an adhesive or by binding to themselves to form layers.

The binder is preferably one that has high adhesion to glass fibers, and more preferably one that has high adhesion to glass fibers and a bonding resin described below. Examples of such binders include one-component adhesives, two-component adhesives, thermosetting adhesives, hot melt adhesives, and electron beam curing adhesives such as ultraviolet curing adhesives. Specific examples include one or a mixture of two or more types selected from urethane resins, vinyl acetate resins, styrene-butadiene copolymers, acrylic resins, vinyl chloride resins, and epoxy resins. The thickness of the glass fibers is, for example, 5 μm to 30 μm in diameter, and preferably 8 μm in diameter.
The thickness is, for example, 20 μm and the length is, for example, 10 mm to 30 mm.

The weight of the glass sheet is not particularly limited, but is preferably 10 g/m ² to 10
The density of the glass sheet is preferably 0 g/m ² or 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 flooring material 1 cannot be sufficiently improved, while if it is too large, the bonding resin may not sufficiently reach the openings in the glass sheet. The density of the glass sheet is not particularly limited, but may be, for example, 0.1 g/cm
³ to 0.5 g/ ^cm3 .

The glass sheets, such as the glass fiber nonwoven fabric and the glass fiber woven fabric, have numerous openings between the glass fibers. Conceptually, each opening is a gap between adjacent glass fibers that is continuously connected in the thickness direction of the glass sheet.

Since the glass sheet has numerous openings, an air passage is secured within the surface of the glass sheet, which runs from the front side to the back side of the glass sheet. If the opening ratio of the glass sheet is large, the air permeability of the glass sheet is high, and conversely, if the opening ratio is small, the air permeability of the glass sheet is low. In this specification, taking these points into consideration, the opening ratio is evaluated by measuring the air permeability of the glass sheet. The opening ratio refers to the total area of openings per unit area of the surface of the glass sheet.

In order to improve the bonding property, it is preferable to use a glass sheet with high air permeability, that is, a glass sheet with a relatively large aperture ratio. On the other hand, in order to impart the strength and dimensional change suppression effect of the glass sheet to the flooring material 1, there is a certain upper limit to the aperture ratio of the glass sheet. From this viewpoint, the air permeability of the glass sheet is preferably 100 ml/cm.
m ² ·sec to 550 ml/cm ² ·sec, more preferably 200 ml/cm ²
·sec to 450 ml/ ^cm2 ·sec.

The air permeability of the glass sheet is a value measured 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., in accordance with the air permeability test method of JIS L 1096. The reason for measuring in a state where three glass sheets are stacked is that in the case of a glass sheet with a suitable opening ratio, the air permeability is too high, and therefore, when one or two sheets are stacked, it may be difficult to measure the air permeability by the above-mentioned measurement method.

In addition, it is preferable to use a so-called "glass sheet with resin" in which a bonding resin is attached to a glass sheet as the shape stabilizing layer 23, since the glass sheet can be firmly bonded to adjacent layers on its back and front surfaces via the bonding resin contained in the glass sheet.
The bonding resin may be applied to the entire surface of the glass fibers, or may be applied to the entire surface of many of the glass fibers and a portion of the surface of the remaining glass fibers, and may be applied uniformly or non-uniformly to the surface of the glass fibers.

The suitable range of air permeability of a glass sheet with resin is smaller than that of a glass sheet without resin, and specifically, the specific numerical value is preferably set to be within a range of 80 ml/ ^cm2 ·sec to 500 ml/ ^cm2 ·sec, and more preferably 100 ml/ ^cm2 ·sec to 400 ml/ ^cm2 ·sec.

The bonding resin of the resin-attached glass sheet is not particularly limited as long as it bonds to both the glass fiber and the resin layer in contact with the glass fiber, and any conventionally known resin can be used. Specifically, it is preferable to use the same type of resin 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 warping of the flooring material and improving dimensional stability, and is preferably 1.0 mm or less, more preferably 0.8 mm or less, and even more preferably 0.7 mm or less from the viewpoint of preventing the flooring material from becoming too thick and reducing the amount of resin component contained in the flooring material. 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. However, when the shape stabilizing layer 23 is a glass sheet with resin, this is not limited, and it can be, for example, 0.4 to 1.0 mm.

As described above, the thickness T of the surface protective layer 4 must be sufficient to cover the anti-slip particles 5. However, as the thickness T of the surface protective layer 4 increases, the contraction force of the surface protective layer 4 increases, and the flooring material 1 becomes more prone to warping. In particular, when the particle diameter of the anti-slip particles 5 is increased in order to provide a flooring material with excellent anti-slip properties, the thickness T of the surface protective layer 4 must be increased, and the flooring material 1 becomes more prone to warping. By configuring the shape stabilizing layer 23 of the flooring material 1 as described above, it is possible to suppress warping of the flooring material 1 and maintain flatness, even when the thickness T of the surface protective layer 4 of the present invention is set to a sufficient thickness to cover the anti-slip particles. In general, in the case of ordinary flooring materials applied with adhesives, the flooring material is fixed to the floor surface with adhesives, so that warping of the flooring material can be suppressed. However, in the case of simple laying flooring materials applied with adhesives,
Since it is difficult to prevent the warping of flooring materials with adhesives, if the ends warp upward after installation, the aesthetic appearance is marred and steps are formed in the joints, which allow dirt to accumulate and reduce the dirt resistance. The flooring material 1 having the shape stabilizing layer 23 can prevent warping, so it can be used suitably not only as a flooring material applied with a normal adhesive, but also as a simple laid flooring material.

The decorative layer 24 is a layer for imparting design to the flooring material 1.
The decorative layer 24 is preferably provided on the front side of the surface layer 3. The decorative layer 24 is not particularly limited as long as it provides a design, but is preferably formed of a thermoplastic resin, for example, and has a design printed thereon or is colored. Examples of the thermoplastic resin include vinyl chloride resin, olefin resin, vinyl acetate resin, acrylic resin, amide resin, ester resin, various elastomers, and rubber, and vinyl chloride resin is preferred from the viewpoint of adhesion to the surface layer 3.

The surface layer 3 is a layer that imparts durability, abrasion resistance, scratch resistance, etc. to the flooring material 1. The surface layer 3 serves to prevent abrasion of the flooring body 2 when the surface protective layer 4 is worn, and to make the surface protective layer 4 less likely to peel off. The surface layer 3 is not particularly limited, but is formed, for example, from a thermoplastic resin and a plasticizer, and examples of the thermoplastic resin include polyvinyl chloride resin,
Examples of the resin include olefin resin, vinyl acetate resin, acrylic resin, amide resin, ester resin, various elastomers, rubber, etc., and vinyl chloride resin is preferred from the viewpoints of flexibility, processability, durability, and cost. As the vinyl chloride resin, paste vinyl chloride resin, suspension vinyl chloride resin, etc. are used. The thermoplastic resin may be used alone or in combination of two or more. As the plasticizer, benzoic acid ester plasticizer, phthalic acid ester plasticizer, etc. are used. The plasticizer may be used alone or in combination of two or more.

The surface protective layer 4 is the layer located on the outermost side of the flooring material 1, and is a layer that protects the flooring material body 2. The surface protective layer 4 may be transparent or opaque, but is preferably transparent so that the design of the decorative layer 24 and the like provided on the back side of the surface protective layer 4 can be visually confirmed. The surface protective layer 4 preferably has a layer thickness of 2 to 50 μm, more preferably 5 to 35 μm, for the reasons that the surface protective layer 4 exhibits scratch resistance while not becoming brittle as a whole and has excellent impact resistance. In particular, a layer thickness of 3 μm or more provides sufficient scratch resistance, and a layer thickness of 35 μm or less does not make the rigidity of the entire flooring material too high, making it less likely to crack and easier to process.

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 contains at least one resin selected from an ionizing radiation curable silicone-modified urethane (meth)acrylate resin and an ionizing radiation curable fluorine-modified urethane (meth)acrylate resin, and anti-slip particles.

The ionizing radiation curable resin used in the surface protective layer 4 of the present invention refers to a resin having an energy quantum capable of crosslinking and polymerizing monomers and the like in a charged particle beam or electromagnetic wave, that is, a resin crosslinked and cured by irradiation with an electron beam or ultraviolet light, and can be obtained by irradiating an ionizing radiation curable resin composition with an electron beam or light in a known manner. 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 properties such as hardness, gloss, and contamination resistance required for the surface protective layer 4, and can be a conventionally known monofunctional monomer, bifunctional monomer, or trifunctional or higher polyfunctional monomer that is suitable for coating, and can be used alone or in combination of two or more kinds. As the curable oligomer, there may be used oligomers such as bisphenol A type, novolak type, and polybutadiene type epoxy (meth)acrylates, and polyether type urethane (meth)acrylates, which have properties such as hardness, gloss, and stain resistance required for the surface protective layer 4 and are suitable for coating.
It is preferable to use a curable monomer or oligomer that is cured by ultraviolet light, since it is possible to form a relatively strong surface protective layer 4 and it is versatile.

The curable monomer or oligomer may have a (meth)acrylate group or a (meth)
Examples of the monomer or oligomer include a polymerizable unsaturated bond group such as an acryloyloxy group, or an epoxy group.

Specific examples of the curable monomer include styrene-based monomers such as α-methylstyrene;
Examples of the curable oligomer include methyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, dipentaerythritol hexa(meth)acrylate, dipentaerythritol penta(meth)acrylate, urethane (meth)acrylate, and polyol compounds having two or more thiol groups in the molecule.
Examples of the polymerizable unsaturated bond include monofunctional (meth)acrylates or polyfunctional (meth)acrylates having a polymerizable unsaturated bond, such as acrylate, polyester (meth)acrylate, epoxy (meth)acrylate, organic-inorganic hybrid (meth)acrylate obtained by condensing colloidal silica with (meth)acryloylalkoxysilane, unsaturated polyester, and epoxy.

Of these, it is preferable to use urethane (meth)acrylate, since it has moderate flexibility and can form a flooring material 1 that has excellent heat resistance, chemical resistance, and durability, and further has excellent adhesion to the flooring body 2.

The molecular weight of the curable monomer or oligomer is not particularly limited, but may be, for example, 200
In the range of 10,000 to 10,000.

The ionizing radiation curable resin composition used in the present invention contains at least one selected from the group consisting of ionizing radiation curable silicone-modified urethane (meth)acrylate resins and ionizing radiation curable fluorine-modified urethane (meth)acrylate resins polymerized therein, and anti-slip particles, and is formed by containing other components as required. Examples of the other components include non-silicone-modified ionizing radiation curable resins, non-fluorine-modified ionizing radiation curable resins, polymerization initiators, and various other additives. As the resin 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 silicone-modified urethane (meth)acrylate resin is mixed with a non-silicone-modified ionizing radiation curable resin, it is preferable to select both of them as photocurable resins or ultraviolet-curable resins, since this provides excellent workability during production.The same is true when an ionizing radiation curable fluorine-modified urethane (meth)acrylate resin is mixed with a non-fluorine-modified ionizing radiation curable resin.

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

The ionizing radiation curable silicon-modified urethane (meth)acrylate resin and the ionizing radiation curable fluorine-modified urethane (meth)acrylate resin may contain one or more functional groups available for a curing reaction, preferably two or more functional groups. In particular, they may be polyfunctional (meth)acrylates having two or more functional groups. The polyfunctional (meth)acrylates may 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 fluorine-modified urethane (meth)acrylate resin in the ionizing radiation curable resin composition is preferably 0.1% by mass to 5% by mass, more preferably 0.3% by mass to 3% by mass.
At 0.1% by mass or more, the stain resistance can be ensured, and at 0.1% by mass or less, the anti-slip properties of the flooring material are not impaired.

In addition, as the polymerizable monomer for the ionizing radiation curable fluorine-modified urethane (meth)acrylate resin and the ionizing radiation curable fluorine-modified urethane (meth)acrylate resin, it is preferable to use a (meth)acrylate monomer having a radical polymerizable unsaturated group in the molecule, because this has good polymerizability.

The ionizing radiation curable silicone modified urethane (meth)acrylate resin is one of the ionizing radiation curable silicone modified urethane (meth)acrylate resins made of polysiloxane with (meth)acrylic groups introduced at one or both ends. The ionizing radiation curable silicone modified urethane (meth)acrylate resin is, for example, an ionizing radiation curable polysiloxane-based urethane (meth)acrylate resin, which is a resin in which a functional group in the polysiloxane and a functional group in the urethane (meth)acrylate resin are chemically reacted and bonded. The number of (meth)acrylic groups is preferably one to six, and depending on the bonding position of the substituted organic group, it can be a side chain type,
They are roughly classified into a both-end type, a one-end type, and a side-chain both-end type, but there is no particular limitation on the bonding position of the organic group.

The silicone-modified urethane (meth)acrylate resin used in the present invention is preferably an ionizing radiation-curable polysiloxane-based urethane (meth)acrylate resin, and one or more polydialkylsiloxane-based urethane (meth)acrylates can be used. Polydimethylsiloxane-based urethane (meth)acrylates are preferred.
For example, it is synthesized by reacting isocyanates, silicone polyols, and hydroxyalkyl (meth)acrylates, and contains an acryloyl group (
having a methacryloyl group (CH ₂ ═C(CH ₃ )—CO—) or a methacryloyl group (CH ₂ ═C(CH 3 )—CO—);
It has a urethane bond (-NH-COO-) and a polydialkylsiloxane bond, preferably a polydimethylsiloxane bond (-(-Si(CH ₃ ) ₂ -O-)n-). These can be synthesized by known methods. In the present invention, "(meth)acrylate" means
A general term for acrylates and methacrylates.

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 a (meth)acrylate. For example, the curable fluorine-based compound is a polyfunctional (meth)acrylate formed by reacting a compound having a perfluoro group, such as perfluoropolyol, perfluoropolyether polyol, perfluoropolyether dibasic acid having a carboxylic acid, and perfluoropolyether epoxy compound having an epoxy group, 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, and can include oligomers or prepolymers such as 2-(perfluorodecyl)ethyl (meth)acrylate, 3-perfluorooctyl-2-hydroxypropyl (meth)acrylate, 3-(perfluoro-9-methyldecyl)-1,2-epoxypropane, 2,2,2-trifluoroethyl (meth)acrylate, and 2-trifluoromethyl (meth)acrylate.

The ionizing radiation curable silicone modified urethane (meth)acrylate resin and the ionizing radiation curable fluorine modified urethane (meth)acrylate resin used in the present invention are cured and integrated at the same time when the ionizing radiation curable resin composition is cured to form a photocured resin layer with high surface hardness. Therefore, a good and long-lasting antifouling surface can be obtained without the silicone or fluorine bleeding out on the surface. Furthermore, since these modified urethane (meth)acrylate resins have urethane bonds in the molecule, they have appropriate toughness due to hydrogen bonds and have excellent bending resistance required for flooring materials.
In addition, it is possible to impart lubricity to the surface of the surface protective layer 4 of the present invention and improve the scratch resistance, etc. At the same time, a problem occurs in that the surface becomes slippery.

As the non-silicon-modified ionizing radiation curable resin and the non-fluorine-modified ionizing radiation curable resin, conventionally known resins can be used. These ionizing radiation curable resins contain a curable resin formed by polymerization of at least one of an electron beam curable monomer and an oligomer that are cured by ionizing radiation, and may contain other components as necessary.

Examples of the ionizing radiation curable monomer or oligomer include a monomer or oligomer having a polymerizable unsaturated bond group or an epoxy group in the molecule, such as a (meth)acrylate group or a (meth)acryloyloxy group. Specific examples of the ionizing radiation curable monomer include styrene monomers such as α-methylstyrene, methyl (meth)acrylate, (meth)
Examples of the ionizing radiation curable oligomer include 2-ethylhexyl acrylate, dipentaerythritol hexa(meth)acrylate, dipentaerythritol 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 light 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 it is more preferable to use a urethane (meth)acrylate.

The molecular weight of the ionizing radiation curable monomer or oligomer is not particularly limited, but is preferably within the range of 200 to 10,000, for example.

Ionizing radiation-curable monomers or oligomers are usually used with the addition of a polymerization initiator, such as 2,2-dimethoxy-2-phenylacetophenone, acetophenone, benzophenone, xanthone, 3-methylacetophenone, 4-chlorobenzophenone, 4,4'-dimethoxybenzophenone, benzoin propyl ether, benzyl dimethyl ketal, N,N,N',N'-tetramethyl-4,4'-diaminobenzophenone, 1-(4-isopropylphenyl)-2-hydroxy-2-methylpropan-1-one, and other thioxanthate compounds.

The anti-slip particles 5 are particles that impart anti-slip properties to the surface protective layer 4, and by blending the anti-slip particles 5 in the surface protective layer 4, fine irregularities are generated on the surface of the surface protective layer 4, making it difficult for the sole of the foot to slip on the surface protective layer 4. As the anti-slip particles 5, for example, one or more types of inorganic particles can be used. Examples of inorganic particles include powders such as silica, alumina, glass, calcium carbonate, barium sulfate, zirconium oxide, silicon nitride, silicon carbide, zeolite, silase balloons, diatomaceous earth, silicon dioxide, and diamond, and alumina is preferable from the viewpoint of durability and cost. It is preferable that the surface protective layer 4 of the flooring material 1 of the present invention does not contain photocatalyst particles. The photocatalyst particles are made of titanium oxide, zinc oxide, tin oxide, iron oxide, copper oxide, etc. that have a photoactivating effect, and are particles that generate active oxygen such as hydrogen peroxide and hydroxyl radicals. The flooring material 1 of the present invention is oxidized and decomposed by the active oxygen generated by the photocatalyst particles.
The anti-slip particles 5 are easily peeled off from the surface protective layer 4, and the antifouling properties and
Therefore, the content of the photocatalyst particles in the ionizing radiation curable resin composition is preferably 4% by mass or less, and more preferably 3% by mass or less.

The shape of the anti-slip particles 5 may be spherical, such as an ellipsoid or a sphere, polygonal, scaly, or irregular, but a spherical shape is preferred from the viewpoint of achieving both antifouling and anti-slip properties, since the corners are rounded. The average particle size of the anti-slip particles 5 is preferably 2 μm to 100 μm, and more preferably 5 μm.
From the viewpoint of imparting anti-slip properties while not impairing the antifouling properties, the ratio of the average particle size of the anti-slip particles 5 to the thickness of the surface protective layer 4 (
The particle diameter (μm)/thickness (μm) is preferably 0.1 to 10, more preferably 0.5 to 5.
and more preferably 0.8 to 3. The average particle size of the anti-slip particles 5 in this specification refers to that measured by particle size distribution measurement using a laser light diffraction method. This allows fine irregularities to be formed on the surface of the surface protection layer 4, making it possible to achieve both antifouling and anti-slip properties.

4, from the viewpoint of antifouling properties, the anti-slip particles 5 are preferably embedded in the surface protective layer 4, and even in the convex portions, a covering portion 5a is preferably formed in which the surface protective layer 4 thinly covers the surface of the anti-slip particles 5. If the anti-slip particles 5 are exposed from the surface protective layer 4, the exposed portions become susceptible to adhesion of dirt, resulting in a deterioration in antifouling properties. For example, the thickness of the covering portion 5a is 1 μm to 10 μm, and preferably 4 to 8 μm.
If the thickness of the coating 5a is smaller than the lower limit, the coating 5a will be easily peeled off, whereas if it is larger than the upper limit, it will be 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 determined from the viewpoint of processability such as viscosity, etc.
The content of the anti-slip particles 5 is preferably 5 to 60% by mass, more preferably 10 to 45% by mass, and further preferably 12 to 30% by mass. When two or more types of the anti-slip particles 5 are used, the content of the anti-slip particles 5 refers to the total amount.

An ionizing radiation polymerization initiator is preferably 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.

Acetophenone-based ionizing radiation polymerization initiators include benzyl dimethyl ketal (also known as
2,2-dimethoxy-2-phenylacetophenone), diethoxyacetophenone, 4-phenoxydichloroacetophenone, 4-t-butyl-dichloroacetophenone, 4-t-butyl-trichloroacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-(4-isopropylphenyl)-2-hydroxy-2-methylpropan-1-one, 1-(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, etc. are included, and benzyl dimethyl ketal and 1-hydroxycyclohexylphenylketone are preferably used.

Benzophenone-based ionizing radiation polymerization initiators include benzophenone, benzoylbenzoic acid, methyl benzoylbenzoate, 4-phenylbenzophenone, hydroxybenzophenone, acrylated benzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, 3,3'-
Dimethyl-4-methoxybenzophenone.

Examples of the thioxanthone-based ionizing radiation polymerization initiator include thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, 2,4-dichlorothioxanthone, 2,4-diethylthioxanthone, and 2,4-diisopropylthioxanthone.

The ionizing radiation polymerization initiator is used in an amount of 0.
It is used in a proportion of 1 to 10 parts by mass, preferably 1 to 8 parts by mass, and more preferably 2 to 6 parts by mass.

In addition, the ionizing radiation curable resin composition may contain any additives as necessary within a range that does not impair the object of the present invention. Examples of the additives include solvents, leveling agents, fine particles other than anti-slip particles, fillers, dispersants, plasticizers, ultraviolet absorbers, surfactants, antioxidants, thixotropic agents, polymerization inhibitors, reactive diluents, non-reactive diluents, matting agents, antifoaming agents, anti-settling agents, heat stabilizers, (meth)acrylate monomers, and compositions containing a curable resin.

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

Specific examples of the (meth)acrylate monomer used as necessary in the present invention include esters of alkylene polyols or polyether polyols having a low polymerization rate with (meth)acrylic acid, such as 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, neopentyl glycol diacrylate, 2(2-ethoxyethoxy)ethyl acrylate, tetrahydrofurfuryl acrylate, 2-phenoxyethyl acrylate, diethylene glycol diacrylate, tetraethylene glycol diacrylate, 1,3-butylene glycol diacrylate, tripropylene glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate, and hydroxypivalic acid neopentyl glycol diacrylate.

The ionizing radiation curable resin composition of the present invention is applied to the flooring body 2 of the flooring material 1 using a coating machine such as a rubber or sponge roll coater, sprayer or vacuum coater, and the applied surface is irradiated with electron beams or light, preferably ultraviolet light, to cure the coating in a wet state, thereby obtaining a cured coating film (coating) with excellent contamination removal properties. There is no particular limit to the number of times the ionizing radiation curable resin composition of the present invention is applied, and it may be applied once or twice or more.

The irradiation with ionizing radiation can be carried out by a conventionally known irradiation method. For example,
The coating film can be cured by irradiating it with an electron beam under conditions of 1000 kV and 3 to 10 Mrad. The light for light irradiation is ultraviolet light or visible light, and the light irradiation can be carried out by a conventionally known irradiation method. For example, a high-pressure mercury lamp is used, with one lamp of 80 to 120 W/cm, and the belt speed is 5 to 20 m/min, and the belt speed can be increased by increasing the number of lamps. The belt speed can also be increased by increasing the W/cm capacity.

The hardness of the surface protective layer 4 can be evaluated by the pencil hardness of a film obtained by applying the ionizing radiation curable resin composition used to form the surface protective layer 4 to a film thickness of 25 μm on a glass plate and curing the composition, and is preferably 6B to 4H from the viewpoints of durability, scratch resistance, and impact resistance. The pencil hardness is measured and evaluated in accordance with the pencil hardness test (JIS K 5600-5-4).

The hardness of the surface protective layer 4 is achieved by appropriately designing the crosslink density of the ionizing radiation curable resin composition, and it is preferable to set the crosslink density so as to achieve the above-mentioned hardness.

From the viewpoint of achieving both anti-slip properties and anti-fouling properties, the surface roughness of the surface protective layer 4 is preferably each of the following values of Ra, Ry, and Rpk. 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. Rpk is preferably 2 to 30, more preferably 3 to 20, and even more preferably 3.5 to 12. In this specification, the surface roughness is determined according to JIS B0601-1994
If each of the Ra, Ry, and Rpk values is equal to or greater than the lower limit, the antifouling properties can be improved, whereas if each of the Ra, Ry, and Rpk values is equal to or less than the upper limit, there is no discomfort when walking and the antislip properties are good.

The surface protective layer 4 may be embossed from the viewpoint of imparting anti-slip properties. The embossing is performed to impart a desired uneven shape to the surface of the flooring material 1. For example, the surface protective layer 4 is heated and softened, and then pressed and shaped with an embossing plate having a desired uneven shape, and then cooled and fixed to impart a texture. The embossing can be performed with a known sheet-type or rotary embossing machine. The uneven shape of the embossing is not particularly limited, and examples thereof include wood grain vessel grooves, raised patterns (raised and uneven patterns of raised annual rings), hairlines, sand grain, pear-finished surfaces, and other patterns in which regular or irregularly arranged convex portions of a fixed shape are protruding, and patterns in which irregularly shaped convex portions are protruding, although not shown in the figures. From the viewpoint of imparting anti-slip properties, non-directional patterns such as sand grain and pear-finished surfaces are preferable because they can exhibit anti-slip properties uniformly in any direction. From the viewpoint of imparting anti-slip properties, the depth of the embossing is, for example, 0.01 to 0.5 mm, more preferably 0.05 to 0.3 mm, and even more preferably 0.1 to 0.2 mm.
is preferred.

The surface protective layer 4 may be either transparent or opaque, but is preferably transparent enough to allow the design of the flooring body 2 to be visually recognized.

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 this 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 to 8
Ionizing radiation curable resin compositions were prepared by adding the alumina shown in Tables 4 to 6 to an ionizing radiation curable resin "UV No. 119LT-DX (manufactured by Chugoku Paint Co., Ltd.)" containing an ionizing radiation curable silicone-modified urethane (meth)acrylate resin in a mass ratio shown in Tables 4 to 6.

Comparative Example 1
An ionizing radiation curable urethane (meth)acrylate resin “UV No. 146B (manufactured by China Paint Co., Ltd.)” that does not contain an ionizing radiation curable silicone-modified urethane (meth)acrylate resin or an ionizing radiation curable fluorine-modified urethane (meth)acrylate resin was used as the ionizing radiation curable resin composition.

Reference Example 1
An ionizing radiation curable urethane (meth)acrylate resin “UV No. 118LT (manufactured by China Paint Co., Ltd.)” that does not contain an ionizing radiation curable silicone-modified urethane (meth)acrylate resin or an ionizing radiation curable fluorine-modified urethane (meth)acrylate resin was used as the ionizing radiation curable resin composition.

Comparative Example 2
The preparation was carried out in the same manner as in Example 2, except that no alumina was added.

Reference Example 2
The procedure of Example 2 was repeated, except that an ionizing radiation curable urethane (meth)acrylate resin "U1102 (manufactured by Dainichiseika Chemicals Co., Ltd.)" which does not contain an ionizing radiation curable silicone modified urethane (meth)acrylate resin or an ionizing radiation curable fluorine modified urethane (meth)acrylate resin was used instead of the ionizing radiation curable resin "No. 119LT-DX (manufactured by Chugoku Paint Co., Ltd.)" which contains an ionizing radiation curable silicone modified urethane (meth)acrylate resin.

[Making flooring]
Examples 1, 2, 3, 4, 5, 8, Comparative Examples 1, 2, Reference Examples 1, 2
An intermediate flooring material, excluding the surface protective layer, from composition table 1 is produced by applying heat and pressure by a known method.
The surface of this intermediate flooring material was mirror-finished or embossed. Here, mirror-finishing refers to pressing with a flat plate or roll with a mirror surface, and embossing refers to pressing with a plate or roll that forms unevenness. Next, the ionizing radiation curable resin composition prepared as described above was applied to a uniform thickness on the surface layer of the intermediate flooring material by a natural roll coating method, and immediately irradiated with ultraviolet light from an electrode ultraviolet lamp in air to form a surface protective layer. For Examples 2 to 5 and Comparative Example 2, two types of samples, mirror-finished and embossed, were prepared, and for Examples 1, 8, Comparative Example 1, Reference Examples 1 and 2, mirror-finished. The glass sheet used in Table 1 had a basis weight of 30 g/ ^m2 and an air permeability of 299 ml/cm.
The embossing time was ² sec, and the embossing depth in the embossing finish was 0.1 mm.
This air permeability was measured using three stacked glass sheets.

Example 6
A flooring material was prepared in the same manner as in Example 8, except that the composition was changed from that in Table 1 to that in Table 2.

Example 7
A flooring material was produced in the same manner as in Example 8, except that the composition was changed from that in Table 1 to that in Table 3. The glass sheet used in Table 3 was 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 rectangular shapes measuring 18 cm x 28 cm in length x width to prepare three samples each. The surfaces of the three samples opposite to the surface protective layer were attached to the inner wall of a cubic hollow container measuring 52 cm x 52 cm x 45 cm in length x width x height. Six cubic rubber pieces measuring 5 cm x 5 cm x 5 cm in length x width x height were placed in the hollow container, and the container was rotated clockwise for 15 minutes (rotation speed: 63 rotations/min), and then,
The sample was rotated counterclockwise for 15 minutes (rotation speed: 63 rpm). After the rotation was stopped, the sample was taken out and the state of stains on the surface was visually observed and photographed.
Next, the surface of each sample was wiped with paper while it was dry (dry wipe) and with paper while it was wet with water (wet wipe). The time it took to finish wiping off the dirt (if it could not be wiped off within 10 minutes, it was considered unsuccessful) and the state of the dirt after wiping were visually observed and photographed.
The stain-resistant and stain-removal properties of the surface after cleaning were visually evaluated according to the following criteria. The results are shown in Table 4. Figure 5 shows the condition of each example immediately after the test and after wiping.
◎: No heel marks ○: Heel marks are left, but can be wiped off in a short time with paper or water △: Heel marks are left, but can be wiped off over time with paper or water ×: Slight heel marks remain even after wiping with paper or water

<Anti-slip properties>
A sensory evaluation of slip resistance was carried out for the flooring materials of Examples 2 to 5, Comparative Example 2, and Reference Example 2 using various types of shoes shown in Table 5. The test results were averaged from the measurements of eight people based on the following criteria. The results are shown in Table 5. In the table, "Dry" refers to the slip resistance of the sample in a dry state.
"Water" refers to the anti-slip property in a wet state where water is uniformly sprayed onto the sample surface.
1. Slippery
2: Slightly slippery 3: Slightly non-slip 4: Non-slip 5: Not slippery

<Warp test>
The warpage of the flooring materials of Examples 6 to 8 was measured using flooring materials with dimensions of 450 mm x 450 mm for Examples 6 and 7, and 500 mm x 500 mm for Example 8. The warpage was measured at 5°C.
The warpage at 23°C and 35°C was measured in accordance with JIS A1454 14. Specifically, the sample was placed on a polished glass plate with the surface facing up, and left to stand for 24 hours in a temperature-controlled room (5, 23, 35±2°C, humidity 50±10%) to adjust the sample, which was then placed on the polished glass plate, and the warpage value was measured at the gap between the four corners of the sample and the glass plate using a magnifying glass with a 1/10 mm scale, and the average value was taken as the warpage value. Note that a positive warpage value indicates that the end is warped upward (upward warpage value),
The negative value indicates that the end portion is warped downward (downward warpage 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 instrument (Surfcom 130A (Tokyo Seimitsu Co., Ltd.)) in accordance with JIS B0601-1994. The values of Ra, Ry, and Rpk were calculated by calculating the values in the longitudinal and transverse directions of the sample, and then calculating the average value. Furthermore, the stain resistance and stain removability were evaluated using the same criteria as above. The results are shown in Table 7. Note that the evaluation of anti-slip properties in Table 7 was based on the sandals in Table 5 in a dry state, with a value of more than 3.0 being ⊚, a value of 2.5 to 3.0 being ◯, and a value of less than 2.5 being x.
Measurement length: 12.5 mm
Cutoff: 2.5mm
Measurement speed: 1.5mm/s
Measurement range: ±40 μm (some ranges are ±400 μm)

From Example 1, Comparative Example 1, and Reference Example 1, it is clear that when the surface protective layer contains an ionizing radiation curable silicone modified urethane (meth)acrylate resin, the surface protective layer has excellent antifouling properties and stain removability.

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

It is preferable that the warping of the flooring material be a moderate negative value, and in comparison with Examples 6 to 8, Example 8, which contained two glass sheets in the main body of the flooring material, was particularly preferable.

From Table 7, it can be seen that Examples 2 to 5, which satisfy the ranges of Ra of 1.85 to 13, Ry of 9 to 70, and Rpk of 2 to 30, have a good balance between antifouling properties, antifouling removability, and antislip properties. Among these, Example 3 was particularly preferable.

The present invention is not limited in any way to the above-mentioned embodiments and examples, and various embodiments can be adopted without departing from the gist of the present invention.

REFERENCE SIGNS LIST 1 Flooring material 2 Flooring material body 21 Base material layer 22 Resin layer 221 First resin layer 222 Second resin layer 223 Third resin layer 23 Shape stabilizing layer 231 First shape stabilizing layer 232 Second shape stabilizing layer 24 Decorative layer 3 Surface layer 4 Surface protective layer 5 Anti-slip particles 5a Covering portion T Thickness of surface protective layer

Claims (8)

A flooring material having a flooring body having a decorative layer containing vinyl chloride resin on a resin layer containing vinyl chloride resin, and a surface layer containing vinyl chloride resin, and a surface protective layer formed from an ionizing radiation curable resin composition applied to the surface layer, wherein the flooring body has a flexibility sufficient to allow it to be wound into a roll when made into a long strip, the surface protective layer contains a cured product of the ionizing radiation curable resin composition, the ionizing radiation curable resin composition contains at least one resin selected from an ionizing radiation curable silicone-modified urethane (meth)acrylate resin and an ionizing radiation curable fluorine-modified urethane (meth)acrylate resin, the surface roughness Ry of the surface protective layer is 10 or more and less than 50, and the surface layer and the surface protective layer are transparent (however, flooring materials containing wood are excluded). The flooring material according to claim 1, wherein the flooring material body includes multiple resin layers, and all of the resin layers include polyvinyl chloride resin. The flooring material according to claim 1 or 2, wherein the surface protective layer further contains anti-slip particles. The flooring material according to any one of claims 1 to 3, which has anti-slip and anti-fouling properties for shoe soles. A method for producing a flooring material (excluding flooring materials containing wood) having a flooring material body including a resin layer and a surface layer containing vinyl chloride resin, and a surface protective layer including a cured product of an ionizing radiation curable resin composition including at least one resin selected from ionizing radiation curable silicone-modified urethane (meth)acrylate resins and ionizing radiation curable fluorine-modified urethane (meth)acrylate resins, and having a surface roughness Ry of 10 or more and less than 50, the method comprising the steps of producing the flooring material body and applying the ionizing radiation curable resin composition onto the surface layer of the flooring material body, wherein the flooring material body has a flexibility sufficient to allow it to be wound into a roll when made into a long strip . The manufacturing method according to claim 5, wherein the surface protective layer further contains anti-slip particles. The manufacturing method according to claim 5 or 6, wherein the flooring body further comprises at least one layer selected from a base layer, a shape stabilizing layer, and a decorative layer. The manufacturing method according to any one of claims 5 to 7, wherein the flooring material has anti-slip and anti-fouling properties for shoe soles.

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