JP7003396B2 - Floor decorative sheets and floor decorative materials - Google Patents

Description

The present invention relates to a floor decorative sheet and a floor decorative material having anti-slip properties.

Flooring materials are often used on the floors of indoor and outdoor buildings in recent years. Most flooring materials are made by painting the veneer, but while they have a wood grain design and a natural texture, they are required to have surface performance such as scratch resistance, stain resistance, and weather resistance in practical use. For this reason, recent flooring materials tend to be made by laminating a decorative sheet on a wood-based base material.
The quality requirements for flooring materials, which are building materials, include those based on laws and regulations such as the Building Standards Act, and those based on standards such as Eco Mark and JIS, as well as practical weather resistance, scratch resistance, and resistance. It is necessary to design the material according to various required qualities such as contaminability, and to select the finish such as surface shape and gloss.

On the other hand, at the same time as satisfying the required performance for practical use, new demands have begun to appear for flooring materials from the viewpoint of safety, comfort or environmental consideration due to the growing awareness of users about the living environment. One of them is anti-slip. This is measured by, for example, JIS-A1454 "Polymer-based upholstered flooring test method", and C.I. S. R. It is expressed by the reference value of slip resistance assuming walking indicated by the value.
For floor sheets used outdoors, especially for stairs, balconies, and condominium corridors, various flooring materials with uneven surfaces have been put into practical use. As one of them, a raised printed pattern portion is formed on the base material, and a group of dotted anti-slip small protrusions made of crosslinked resin is formed on the surface of the printed pattern portion by printing and integrally fixed to the non-slip flooring material. It has been known.

The demand for anti-slip has also been raised from another angle, for example, when keeping pets indoors, especially dogs, the slipping of the flooring hinders the pet's walking, causing abnormalities in the bones and joints of the legs and causing stress. There is a problem that it may happen. This is a common issue not only for flooring but also for floor sheets.
In response to this, a special anti-slip wax is applied to the surface of the flooring or floor sheet, but it is costly and complicated to apply the entire floor, and it is applied regularly. There is a problem that it must be fixed.
The problem with pets, flooring and floor seats is not limited to that, especially when dogs are kept indoors, the flooring and flooring and floor claw contact and rubbing noises during walking can be heard as unpleasant sounds. May be a problem.

Japanese Unexamined Patent Publication No. 2007-135482 Japanese Unexamined Patent Publication No. 2013-217066

Conventionally, there has been a method of adding an anti-slip filler or the like into the coating to impart anti-slip properties, but if the filler slips off due to rubbing or the like, the anti-slip properties may decrease.
There is also a method of increasing the difference in unevenness on the surface to improve the anti-slip property, but the tactile sensation such as the feeling of touching the foot is deteriorated, and the design is also deteriorated.
An object of the present invention is a decorative sheet for a floor, which can reproduce tactile sensation and design without much difference from conventional flooring materials while suppressing deterioration of anti-slip property due to rubbing or the like.

In order to solve the problem, the floor decorative sheet according to one aspect of the present invention is a floor decorative sheet in which a printing layer and a thermoplastic resin layer are provided in this order on the surface side of the base sheet, and the heat is described above. A plurality of convex portions are formed on the surface of the plastic resin layer, and the area of each of the convex portions in a plan view is 25 μm or more and 60 μm or less on one side when the area is converted into a square shape, and is per 1 mm ² . The number of the convex portions is 70 or more and 160 or less.

According to one aspect of the present invention, by specifying the convex portion as described above, it is possible to reproduce the tactile sensation and the design property without much difference from the conventional flooring material while suppressing the deterioration of the anti-slip property due to rubbing or the like.
In particular, it is possible to provide suitable anti-slip properties when walking with socks, stockings, etc., and when walking pets, particularly dogs and cats.

It is a schematic sectional drawing for demonstrating the floor decorative sheet and the floor decorative material which concerns on embodiment based on this invention.

Next, an embodiment of the present invention will be described with reference to the drawings.
Here, the drawings are schematic, and the relationship between the thickness and the plane dimensions, the ratio of the thickness of each layer, and the like are different from the actual ones. Further, the embodiments shown below exemplify a configuration for embodying the technical idea of the present invention, and the technical idea of the present invention describes the materials, shapes, structures, etc. of the constituent parts as follows. It is not specific to things. The technical idea of the present invention may be modified in various ways within the technical scope specified by the claims described in the claims.
As shown in FIG. 1, the floor decorative material 10 of the present embodiment is configured by providing a decorative sheet 1 on one surface (surface) of the floor base material 8.

<Floor base material 8>
The floor base material 8 is made of, for example, a wood base material or a metal plywood. As the wood substrate, one of medium density wood fiberboard (MDF), high density wood fiberboard (HDF), particle board (PB), coniferous plywood and early-maturing plywood, or two or more selected from these boards. An example is a base material composed of laminated boards.
The thickness of the floor base material 8 is not particularly limited, but is, for example, 2 to 15 mm.
When the floor base material 8 is a wood base material, a moisture-proof film may be provided on the other surface (back surface) of the floor base material 8 to provide moisture-proof properties. The moisture-proof film preferably has a moisture permeability of 7 g / ^m for 2.24 hours or less. The moisture permeability is a measured value in a temperature of 40 ° C. and a humidity of 90% RH environment according to JIS Z0208 (moisture permeability test method (cup method)). The moisture-proof film has, for example, a resin base material layer and a thin-film deposition layer formed on the base material layer. The base material layer of the moisture-proof film is made of a resin, and is an olefin-based thermoplastic resin such as polyethylene, polypropylene, an ethylene-propylene copolymer, an ethylene-vinyl alcohol copolymer, and a mixture thereof; polyethylene terephthalate and polybutylene terephthalate. , Polyethylene naphthalate, Polyethylene naphthalate-isophthalate copolymer, Polycarbonate, Polyarylate and other ester-based thermoplastic resins; Acrylic-based thermoplastic resins such as methyl polymethacrylate, ethyl polymethacrylate, butyl polyacrylate and the like. Examples thereof include non-halogen thermoplastic resins such as polyethylene, polyurethane, polystyrene, and acrylonitrile-butadiene-styrene resin. Examples of the thin-film deposition layer include a vapor-deposited layer of an inorganic substance made of a metal thin film typified by aluminum, and an inorganic oxide-deposited layer made of an inorganic oxide thin film typified by silicon oxide, magnesium oxide, and aluminum oxide. It is preferable to provide a surface protective layer on the thin-film deposition layer for the purpose of further improving the gas barrier property of the thin-film deposition layer.

<Floor decorative sheet 1>
The floor decorative sheet 1 is provided with a printing layer 3 (solid ink layer / pattern ink layer), a thermoplastic resin layer 4, and a top coat layer 6 in this order on the surface side of the base sheet 2. As will be described later, a plurality of convex portions 5 are formed on the surface of the thermoplastic resin layer 4 by embossing or the like. The top coat layer 6 contains at least one of a thermosetting resin and an ionizing radiation curable resin as a main component.
Further, a primer layer 7 is formed on the back surface of the base sheet 2 to which the floor decorative material 10 is attached. A urethane resin-based adhesive layer or a transparent adhesive resin layer may be provided between the printing layer 3 and the thermoplastic resin layer 4 for the purpose of imparting adhesiveness and other functions.

[Base sheet 2]
The base material sheet 2 is composed of, for example, one layer or a plurality of layers of paper, woven fabric or non-woven fabric, and a resin sheet. Examples of the paper include thin paper, high-quality paper, kraft paper, Japanese paper, titanium paper, resin-impregnated paper, and inter-paper reinforced paper. Examples of the woven fabric or non-woven fabric include woven fabric or non-woven fabric made of wood fiber, glass fiber, asbestos, polyester fiber, vinylon fiber, rayon fiber and the like. Examples of the resin sheet include synthetic resin sheets such as polypropylene, polyolefin, polyester, polyacrylic acid, polyamide, polyurethane, and polystyrene. Among them, polyolefin resins can be preferably used in terms of environmental compatibility, processability, and price. The grade and composition of the resin can also be selected in consideration of ease of seating, printability, and suitability for bending.
The thickness of the base sheet 2 is preferably about 20 to 300 μm. The base sheet 2 may be colored if necessary. Further, the surface may be subjected to surface treatment such as corona discharge treatment, plasma treatment, ozone treatment and the like.

[Print layer 3]
The print layer 3 is composed of a pattern ink layer and a solid ink layer. The print layer 3 can be formed by a printing method such as gravure printing, offset printing, or silk screen printing. Examples of the pattern of the pattern ink layer include a wood grain pattern, a stone grain pattern, a cloth pattern, a leather pattern, a geometric pattern, characters, symbols, line drawings, and various abstract patterns. The solid ink layer is obtained by solid printing of colored ink. The print layer 3 is composed of one or both of the pattern ink layer and the solid ink layer.
As the ink used for the printing layer 3, the vehicle includes chlorinated polyethylene, chlorinated polyolefin such as chlorinated polypropylene, polyester, polyurethane composed of isocyanate and polyol, polyacrylic, polyvinyl acetate, polyvinyl chloride, vinyl chloride-vinyl acetate. A copolymer, a cellulose-based resin, a polyamide-based resin, or the like is used by mixing one or more kinds, and a pigment, a solvent, various auxiliary agents, and the like are added to the mixture to make an ink. Among these, one or a mixture of two or more of polyester, polyurethane composed of isocyanate and polyol, polyacrylic acid, polyamide-based resin, etc. is preferable from the viewpoint of environmental problems, adhesion to the printed surface, and the like.

[Thermoplastic resin layer 4]
The thermoplastic resin layer 4 can be suitably formed by a transparent thermoplastic resin.
Specifically, both soft, semi-hard or hard polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, and ethylene-acrylic acid ester. Examples thereof include polymers, ionomers, acrylic acid esters, and methacrylic acid esters. Among the above, polyolefin resins such as polypropylene are preferable.
The thermoplastic resin layer 4 may be colored so that a part of the print layer 3 can be visually recognized. In this case, a colorant may be added to the thermoplastic resin. As the colorant, the pigment or dye used in the printing layer 3 can be used.
The thermoplastic resin layer 4 contains a filler, a matting agent, a foaming agent, a flame retardant, a lubricant, an antistatic agent, an antioxidant, an ultraviolet absorber, a light stabilizer, a radical scavenger, and a soft component (for example, rubber). ) And other various additives may be included.

[Top coat layer 6]
The top coat layer 6 is provided to impart surface physical properties such as scratch resistance, wear resistance, water resistance, and stain resistance required for the decorative sheet 1. As the resin forming the top coat layer 6, a resin containing a curable resin such as a thermosetting resin or an ionizing radiation curable resin as a main component is preferable. The main component refers to 70% by volume or more of the whole. In particular, the ionizing radiation curable resin is preferable from the viewpoint of high surface hardness, productivity and the like. The top coat layer 6 may be composed of a mixed resin of a thermosetting resin and an ionizing radiation curable resin.

Examples of the thermosetting resin include unsaturated polyester resin, polyurethane resin (including two-component curable polyurethane), epoxy resin, aminoalkyd resin, phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, and melamine. -Urea cocondensation resin, silicon resin, polysiloxane resin and the like can be mentioned.
A curing agent such as a cross-linking agent and a polymerization initiator, and a polymerization accelerator can be added to the resin. For example, as a curing agent, isocyanate, organic sulfonate, etc. can be added to unsaturated polyester resin, polyurethane resin, etc., organic amine, etc. can be added to epoxy resin, peroxide such as methyl ethyl ketone peroxide, azoisobutylnitrile, etc. A radical initiator can be added to the unsaturated polyester resin.

Examples of the method of forming the top coat layer 6 with the thermosetting resin include a method of applying a solution of the thermosetting resin by a coating method such as a roll coating method and a gravure coating method, and drying and curing the solution. The amount of the solution applied is approximately 5 to 30 μm, preferably about 5 to 20 μm in terms of solid content.
The ionizing radiation curable resin is not limited as long as it is a resin that undergoes a cross-linking polymerization reaction by irradiation with ionizing radiation and changes into a three-dimensional polymer structure. For example, one or more of prepolymers, oligomers and monomers having a polymerizable unsaturated bond or an epoxy group in the molecule that can be crosslinked by irradiation with ionizing radiation can be used. For example, acrylate resins such as urethane acrylates, polyester acrylates and epoxy acrylates; silicon resins such as siloxane; polyester resins; epoxy resins and the like can be mentioned.

Examples of ionizing radiation include visible light, ultraviolet rays (near ultraviolet rays, vacuum ultraviolet rays, etc.), X-rays, electron beams, ionizing rays, etc. Among them, ultraviolet rays and electron beams are preferable.
As the ultraviolet source, a light source of an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc lamp, a black light fluorescent lamp, or a metal halide lamp can be used. The wavelength of ultraviolet rays is about 190 to 380 nm.
As the electron beam source, for example, various electron beam accelerators such as Cockcroft-Walt type, Van de Graaff type, resonance transformer type, insulated core transformer type, linear type, dynamitron type, and high frequency type can be used. The energy of the electron beam is preferably about 100 to 1000 keV, more preferably about 100 to 300 keV. The irradiation amount of the electron beam is preferably about 2 to 15 Mrad.

The ionizing radiation curable resin is sufficiently cured by irradiating it with an electron beam, but when it is cured by irradiating it with ultraviolet rays, it is preferable to add a photopolymerization initiator (sensitizer).
In the case of a resin system having a radically polymerizable unsaturated group, the photopolymerization initiator is, for example, acetophenone, benzophenone, thioxanthone, benzoin, benzoin methyl ether, Michler benzoyl benzoate, Michler ketone, diphenyl sulfide, dibenzyl disulfide. , Diethyl oxide, triphenylbiimidazole, isopropyl-N, N-dimethylaminobenzoate and the like can be used. In the case of a resin system having a cationically polymerizable functional group, for example, at least one of an aromatic diazonium salt, an aromatic sulfonium salt, a metallocene compound, a benzoin sulfonic acid ester, a freeleoxysulfoxonium diallyl iodosyl salt and the like. Can be used.

The amount of the photopolymerization initiator added is not particularly limited, but is generally about 0.1 to 10 parts by mass with respect to 100 parts by mass of the ionizing radiation curable resin.
As a method for forming the protective layer with the ionizing radiation curable resin, for example, a solution of the ionizing radiation curable resin may be applied by a coating method such as a gravure coating method or a roll coating method. The amount of the solution applied is approximately 5 to 30 μm, preferably about 5 to 20 μm as a solid content.
In order to further impart scratch resistance and abrasion resistance to the top coat layer 6 formed of the ionizing radiation curable resin, an inorganic filler may be blended. Examples of the inorganic filler include powdered aluminum oxide, silicon carbide, silicon dioxide, calcium titanate, barium titanate, magnesium pyrobolate, zinc oxide, silicon nitride, zirconium oxide, chromium oxide, iron oxide, and boron nitride. Examples thereof include diamond, Kongo sand, and glass fiber.
The amount of the inorganic filler added is about 1 to 80 parts by mass with respect to 100 parts by mass of the ionizing radiation curable resin.

[others]
In the lamination of each layer, for example, a print layer 3 (solid ink layer, pattern ink layer) is formed by printing on one surface of the base sheet 2 in order, and then a known dry such as a two-component curable urethane resin is formed on the print layer 3. This can be done by laminating the transparent thermoplastic resin layer 4 via a lamination adhesive by a dry lamination method, a T-die extrusion method, or the like, and further forming a top coat layer 6.
Here, the decorative sheet 1 may have a synthetic resin layer (so-called backer layer) having a thickness of 100 μm or more in the lowermost layer (layer to be adhered to the floor base material 8). The backer layer means a cushioning layer for the purpose of shock absorption and the like in the floor decorative material 1010.
A known adhesive can be used when laminating (attaching) the decorative sheet 1 and the floor base material 8. When the floor base material 8 is a wood-based base material, the adhesives include, for example, polyvinyl acetate, polyvinyl chloride, vinyl chloride / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ionomer, and butadiene. -Adhesives containing acrylic nitrile rubber, neoprene rubber, natural rubber, etc. as active ingredients can be mentioned. The thickness of the adhesive layer is not limited, but is preferably about 0.1 to 50 μm.

<Convex part 5>
In the floor decorative material 10 of the present embodiment, a plurality of convex portions 5 are formed on the surface of the decorative sheet 1 side.
The area of each of the convex portions 5 in a plan view is in the range of 25 μm or more and 60 μm or less on one side when the area is converted into a square shape. Further, the number of convex portions 5 per 1 mm ² in a plan view is in the range of 70 or more and 160 or less. The arrangement of the plurality of convex portions 5 is preferably random. Random placement is determined, for example, by random number calculation. When the convex portions 5 are randomly arranged, unpleasant rubbing noises associated with walking with stockings, walking with pets, or the like are suppressed.

The shape of each convex portion 5 is a columnar shape such as a square column or a cylinder, or a frustum shape such as a truncated cone or a truncated cone, and the shape of the upper surface is one of a square or other regular polygonal shape or a circular shape such as a perfect circle or an elliptical shape. It is preferably composed of. The upper surface of the convex portion 5 may be flat or may be hemispherically raised. The position where the above area is converted into a square shape is the position on the upper surface of the convex portion 5.
The method for forming the convex portion 5 may be, for example, a method of forming an uneven shape on the surface of the thermoplastic resin layer 4 by heating and pressurizing using an embossing mold (so-called embossing). When the thermoplastic resin layer 4 is formed by an extruder, the convex portion 5 can be formed on the surface of the thermoplastic resin layer 4 by embossing roll or the like immediately after extrusion.

When the convex portions 5 are arranged at regular intervals such as a houndstooth, a rubbing sound associated with walking of a pet or the like is generated at the same frequency, resonates and is amplified, resulting in unpleasant rubbing. It is felt by the human ear as a sound. In the present embodiment, since the convex portions 5 are randomly arranged, the frequency of the rubbing sound is not uniform, and the resonance and amplification of the rubbing sound are suppressed. Therefore, it is possible to suppress the unpleasant rubbing noise heard by the ears.
The height of each convex portion 5 is in the range of 20 μm or more and 80 μm or less. If the height of the convex portion 5 is less than 20 μm, the anti-slip performance is inferior, and if it is larger than 80 μm, it becomes difficult to form the convex portion 5 shape and the manufacturing process becomes difficult. The height is also the height difference between the adjacent convex portions 5 and the concave portions among the formed irregularities.

In an indoor experiment, when a person walks with socks and stockings, or when a dog walks, the diameter is 25 μm or more and 60 μm or less, and the number of convex portions 5 per 1 mm ² is within the range of 70 or more and 160 or less. In the present invention, the present invention is limited to this range because it has been found that the anti-slip property and the feeling of touch are particularly excellent.
When the top coat layer 6 is provided on the outermost surface of the thermoplastic resin layer 4 on which the convex portion 5 is formed, a crosslinked resin such as a thermosetting resin, an ultraviolet curable resin, or an electron beam curable resin is provided. By using the above, it is possible to enhance the weather resistance, scratch resistance, stain resistance, etc. of the floor decorative sheet 1 having anti-slip properties. The shape of the convex portion 5 formed on the surface of the thermoplastic resin layer 4 is reflected in the top coat layer 6 formed on the convex portion 5, and the convex portion 5 is also formed on the surface of the top coat layer 6.

The floor decorative material 10 as described above can also be used as a floor material for floor heating. In this case, for example, a heating appliance provided with a heating means such as a hot water pipe is arranged under the floor decorative material 10, but by providing a moisture-proof film, the floor makeup due to the moisture from the heating appliance is provided. The warp of the material 10 is prevented, and the deterioration of the anti-slip effect over time can be more effectively prevented.

<Effect of embodiment>
The embodiment of the present invention has the following effects.
(1) In the floor decorative sheet 1 having the shape of the convex portion 5 having a side surface (upper surface) of 25 μm or more and 60 μm or less in terms of a square shape, the number of protrusions of the convex portion 5 per 1 mm ² is 70. More than 160 pieces or less. According to this configuration, the anti-slip properties of socks, stockings, etc., which are assumed to be indoors, are improved.
(2) The convex portions 5 are randomly arranged. According to this configuration, unpleasant interference noise due to rubbing against stockings, pet's feet, or the like is reduced.
(3) A top coat layer 6 made of a curable resin is provided on the surface. According to this configuration, the surface durability such as wear and scratches on the surface of the decorative sheet is improved.
(4) Then, by laminating the above-mentioned anti-slip floor sheet to the floor base material 8, a floor material having both anti-slip properties and durability is provided.

Next, an example based on the present invention will be described.
<Floor decorative sheet 1>
(Example 1)
The anti-slip floor decorative sheet 1 based on the present invention was prepared by the following materials and procedures. The layer structure is as shown in FIG.
As the polypropylene base sheet 2, a pigment-blended random polypropylene sheet (manufactured by RIKEN TECHNOS) having a thickness of 70 μm was used. A wood grain pattern was formed on the base sheet 2 by gravure printing using urethane ink (Lamister manufactured by Toyo Ink Mfg. Co., Ltd.) to form a printing layer 3.

Further, a homopolypropylene resin (manufactured by Prime Polymer Co., Ltd.) is formed on the printing layer 3 as a transparent polypropylene resin layer 4 made of polypropylene by an extruder, and at the same time extruded, the surface of the transparent thermoplastic resin layer 4 is extruded using an embossed plate. A convex portion 5 was formed on the surface.
The embossed plate used was a concave embossed plate having a cell shape of 60 μm square in frontage, a square with a 25 μm bottom, and a depth of 45 μm. The arrangement was random with normal random numbers, and the number of protrusions was 80 per 1 mm ² .
Subsequently, an ultraviolet curable resin (urethane acrylate resin manufactured by DIC Graphic) was applied as a top coat layer 6 on the thermoplastic resin layer 4 on which the convex portion 5 was formed so as to have a thickness of 5 μm, and the metal halide lamp was coated. It was cured by irradiating it with ultraviolet rays to obtain the floor decorative sheet 1 of Example 1.

(Comparative Example 1)
The anti-slip floor decorative sheet 1 of Comparative Example 1 was prepared by the same materials and procedures as in Example 1 except that the number of protrusions of the protrusions was 50 per 1 mm ² .
(Comparative Example 2)
The anti-slip floor decorative sheet 1 of Comparative Example 2 was prepared by the same materials and procedures as in Example 1 except that the number of protrusions of the protrusions was 256 per 1 mm ² .
(Comparative Example 3)
The anti-slip floor decorative sheet 1 of Comparative Example 3 was used with the same materials and procedures as in Example 1 except that one side at the lower part of the convex portion was set to 15 μ or more and 30 μ or less and the number of protrusions was 100 per 1 mm ² . Created.
(Comparative Example 4)
The anti-slip floor decorative sheet 1 of Comparative Example 4 was used with the same materials and procedures as in Example 1 except that one side at the lower part of the convex portion was 65 μm or more and 100 μm or less and the number of protrusions was 71 per 1 mm ² . Created.

<Evaluation method and evaluation criteria>
A two-component water-based emulsion adhesive (manufactured by Chuo Rika Kogyo Co., Ltd.) using the anti-slip floor decorative sheet 1 of Example 1 and each comparative example as an adhesive on the surface of MDF (hardwood) having a thickness of 3 mm, which is a floor base material 8. "Ricabond" (weight ratio BA-10L / BA-11B = 100: 2.5) is applied to 100g / m ² in a wet state, then bonded and cured for 24 hours to obtain 10 floor decorative materials. did.
Then, these floor decorative materials 10 were evaluated by the following methods.

(Evaluation 1) Anti-slip performance evaluation A test was conducted according to JIS-A1454, and C.I. S. R. The value was calculated.
The evaluation criteria are as follows.
Evaluation criteria:
C. S. R value 0.38 or more: Pass C. S. R value 0.37 or less: Fail (evaluation 2) Evaluation of touch feeling Evaluation was made by a sensory test. The evaluation was performed by 10 examiners. The examiner is wearing stockings.
The evaluation criteria were 0 for good people ... "x", 1 to 6 people ... "△", and 7 to 10 people ... "○".
The evaluation results are shown in Table 1.

As can be seen from Table 1, both the anti-slip performance and the feeling of touch are good within the scope of the present invention.
Here, in Example 1, when the number of protrusions per 1 mm ² was evaluated as 70 and 160, respectively, the same evaluation as in Example 1 was obtained.

1 Floor decorative sheet 2 Base sheet 3 Printing layer 4 Thermoplastic resin layer 5 Convex 6 Top coat layer 8 Floor base material 10 Floor decorative material

Claims (4)

A floor decorative sheet in which a printing layer and a thermoplastic resin layer are provided in this order on the surface side of the base sheet.
A plurality of protrusions are formed on the surface of the thermoplastic resin layer,
The height of the convex portion is within the range of 20 μm or more and 80 μm or less.
The area of each of the convex portions in a plan view is 60 μm or less as well as more than 30 μm on one side when the area is converted into a square shape.
The number of the convex portions per 1 mm ² is 70 or more and 160 or less.
The above-mentioned plurality of convex portions are randomly arranged, and
The random arrangement of the plurality of convex parts is determined by random number calculation using normal random numbers .
The shape of the convex portion is a columnar or frustum-like shape.
A floor decorative sheet characterized in that the shape of the upper surface of the convex portion is a regular polygonal shape or a circular shape. The floor decorative sheet according to claim 1, wherein the base material sheet is a thermoplastic resin base material made of a polyolefin resin. A top coat layer is provided on the thermoplastic resin layer on which the convex portion is formed.
The floor decorative sheet according to claim 1 or 2, wherein the top coat layer contains at least one of a thermosetting resin and an ionizing radiation curable resin as a main component. A floor decorative material in which a primer layer is formed and a floor base material is bonded to the back surface of the floor decorative sheet according to any one of claims 1 to 3.

Images