Quasi on-ice floor material

Abstract

To provide a quasi on-ice floor material that can provide slipperiness equivalent to that of an ice surface for ice sports or ice games.SOLUTION: A quasi on-ice floor material 1 has a surface layer 2 with a surface 2A that can come into contact with equipment for ice sports or ice games. The surface layer 2 contains a base resin and a silicone resin, with the number of parts of the silicone resin exceeding 5 pts.mass per 100 pts.mass of the base resin.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a simulated ice floor material. [Background technology]

[0002] Conventionally, a known method for forming ice rinks for ice sports such as curling and ice skating involves spraying water onto a nonwoven fabric with lines necessary for the sport drawn on it, and then using natural cold air to form frozen ice (see, for example, Patent Document 1 below). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-116842 Summary of the Invention [Problem to be solved by the invention]

[0004] However, there are cases where it is difficult to produce ice using the method described in Patent Document 1.

[0005] The present invention provides a simulated ice floor material that can provide slipperiness equivalent to that of the ice surface used for ice sports. [Means for solving the problem]

[0006] The present invention [1] includes a pseudo-ice floor material having a surface layer that has a surface that can come into contact with equipment for ice sports or ice games, the surface layer containing a base resin and a silicone resin, and the number of parts of the silicone resin per 100 parts by mass of the base resin exceeds 5 parts by mass.

[0007] The present invention [2] includes the artificial ice floor material of [1] above, in which the surface is embossed, the arithmetic mean height (Sa) of the surface is 0.5 μm or more and 30 μm or less, and the maximum height (Sz) of the surface is 20 μm or more and 200 μm or less.

[0008] The present invention [3] includes the artificial ice floor material of [1] or [2] above, in which the slip resistance coefficient of the surface in a cleaned and dried state is 0.60 or less when a rubber sheet with a hardness of A78 and a thickness of 3 mm to 6 mm is used as the sliding piece in the slip resistance test specified in JIS A1454:2016.

[0009] The present invention [4] includes the artificial ice floor material according to any one of the above [1] to [3], wherein the surface layer further contains an antistatic agent. [Effects of the Invention]

[0010] According to the artificial ice floor material of the present invention, the surface layer contains a base resin and a silicone resin, and the number of parts of silicone resin per 100 parts by mass of the base resin is adjusted to exceed 5 parts by mass.

[0011] As a result, it is possible to obtain slipperiness equivalent to that of the surface of ice used in ice sports or ice games. [Brief explanation of the drawings]

[0012] [Figure 1] 1A to 1C are explanatory diagrams for explaining a method for measuring the amount of drooping of a floor sheet. [Figure 2] FIG. 2 shows a cross-sectional view of one embodiment of the artificial ice floor material of the present invention. [Figure 3] FIG. 3 shows a cross-sectional view of a modified example of the artificial ice floor material. DETAILED DESCRIPTION OF THE INVENTION

[0013] 1.Imaginary ice floor material The artificial ice floor material of the present invention will be described.

[0014] The term "fake ice flooring" refers to a resin flooring material having a surface that replicates the surface of ice used in ice sports or ice games. The fake ice flooring material can be used, for example, for ice sports, ice sport practice, and ice games.

[0015] Examples of ice sports include curling, skating, and ice hockey. Preferably, the ice sport is curling.

[0016] Examples of ice activities include sledding and mini-skiing.

[0017] Among ice sports, curling in particular can be difficult to secure a competition field or practice area for. In this regard, if artificial ice flooring is used for curling practice, it will be possible to practice even in cases where it is difficult to secure a competition field or practice area.

[0018] The artificial ice floor material of the present invention corresponds to, for example, the vinyl floor material specified in JIS A5705, and includes floor tiles and floor sheets. As the artificial ice floor material, floor sheets are preferable to floor tiles because they leave fewer joints after construction.

[0019] Examples of floor tiles include single-layer vinyl floor tiles, multi-layer vinyl floor tiles, laid vinyl floor tiles, thin laid vinyl floor tiles, composition vinyl floor tiles, etc. Examples of floor sheets include single-layer vinyl floor sheets, multi-layer vinyl floor sheets, etc.

[0020] Floor tiles are formed into square, rectangular, hexagonal or other shapes during manufacturing, and are laid on the floor when in use.

[0021] The floor sheet has flexibility such that it can be rolled up for storage and transportation, and is laid on the floor when in use. When the floor sheet is rolled up, the diameter of the roll is, for example, 100 cm or less, preferably 20 cm or less.

[0022] The "sagging amount at 5°C" of the floor sheet is, for example, 70 mm or more and 170 mm or less, preferably 85 mm or more and 150 mm or less, and more preferably 90 mm or more and 120 mm or less.

[0023] The "sagging amount at 23° C." of the floor sheet is, for example, 80 mm or more and 180 mm or less, preferably 90 mm or more and 160 mm or less, and more preferably 100 mm or more and 130 mm or less.

[0024] If the "sagging amount at 5°C" and "sagging amount at 23°C" of the floor sheet are equal to or greater than the above lower limit, the floor sheet can be easily rolled up, facilitating storage and transportation. Also, if the "sagging amount at 5°C" and "sagging amount at 23°C" of the floor sheet are equal to or less than the above upper limit, unevenness in the base can be concealed when the floor sheet is laid on the base.

[0025] The "sag amount at 5°C" and "sag amount at 23°C" of a floor sheet are measured using the following method for measuring the sag amount of a floor sheet.

[0026] <Method for measuring floor sheet sagging amount> The floor sheet is cut into a 5 cm (first direction length) x 40 cm (second direction length) sample piece, which is then placed in a temperature-controlled room at 23°C and 50% RH and left for 24 hours.

[0027] 1A, first and second bases 11 and 12, each 30 cm high, and a ruler 13 are prepared separately. Second base 12 is movable relative to first base 11 in a second direction.

[0028] Next, as shown in Figure 1B, in a room at 5°C or 23°C and normal pressure, with the second base 12 positioned adjacent to the first base 11, one end (10 cm) of the sample piece S in the second direction is placed on the first base 11, and the remaining part (30 cm) of the sample piece S is placed on the second base 12.

[0029] 1C, a weight is placed on one end of the sample piece S in the second direction to fix the sample piece S to the first pedestal 11, and the second pedestal 12 is then moved in a direction away from the first pedestal 11. Then, the remaining part of the sample piece S is no longer supported by the second pedestal 12 and begins to hang down.

[0030] Ten seconds after the second base 12 is moved, the amount of drooping of the remaining portion of the sample piece S is measured with the ruler 13. When measuring the amount of drooping, the distance in the second direction between the ruler 13 and the first base 11 is 10 cm.

[0031] The vertical distance between the intersection P of the scale of the ruler 13 and the surface of the remaining part of the sample piece S and the surface of one end of the sample piece S is defined as the hanging amount.

[0032] The smaller the amount of sagging, the greater the bending rigidity (stiffer), and the greater the amount of sagging, the smaller the bending rigidity (softer).

[0033] 2, the artificial ice floor material 1 includes a surface layer 2. The artificial ice floor material 1 may include a fiber reinforcement layer 3 and a back layer 4.

[0034] (1) Surface layer The surface layer 2 has a surface 2A that can come into contact with ice sports equipment. The surface 2A is embossed.

[0035] Examples of the embossed pattern include matte, sand, mirror, and wood grain. Of the embossed patterns, matte is preferred.

[0036] The arithmetic mean height (Sa) of the surface 2A is, for example, 0.5 μm or more and 30 μm or less, preferably 0.8 μm or more and 25 μm or less, and more preferably 1 μm or more and 20 μm or less.

[0037] The maximum height (Sz) of the surface 2A is, for example, 20 μm or more and 200 μm or less, preferably 30 μm or more and 170 μm or less, and more preferably 35 μm or more and 165 μm or less.

[0038] When the embossed pattern is matte and the arithmetic mean height (Sa) and maximum height (Sz) of the surface 2A are equal to or greater than the lower limit values, a tactile sensation equivalent to that of curling ice can be achieved when rubbed with a brush.

[0039] In the slipperiness test specified in JIS A1454:2016, when a fluororesin sheet (more specifically, a fluororesin slider attached to the sole of a curling shoe) is used as the sliding piece, the slip resistance coefficient of surface 2A in a clean and dry state is, for example, 0.23 or less.

[0040] If the slip resistance coefficient of the surface 2A in a clean and dry state when a fluororesin sheet is used as the sliding piece is below the above upper limit value, the fluororesin sheet can be attached to shoes and the artificial ice floor material 1 can be slid on in the same way as on an ice surface.

[0041] In a slipperiness test specified in JIS A1454:2016, when a rubber sheet having a hardness of A78 and a thickness of 3 mm to 6 mm is used as the sliding piece, the slip resistance coefficient of the surface 2A in a cleaned and dried state is, for example, 0.60 or less, preferably 0.50 or less, more preferably 0.45 or less, and for example, 0.35 or more, preferably 0.30 or more.

[0042] If the slip resistance coefficient of the surface 2A in a cleaned and dried state when a rubber sheet is used as the sliding piece is within the above range, then by wearing shoes with rubber soles, the same slip resistance and sliding properties can be obtained on the artificial ice floor material 1 as on an ice surface.

[0043] In addition, curling players wear shoes made of different materials on their left and right feet. Specifically, if a player throws the stone with their right hand, they wear a shoe with a rubber sole on their right foot and a shoe with a highly slippery material such as fluorine or silicone on their left foot. Therefore, it is difficult to reproduce the difference in slipperiness between the left and right shoes on anything other than actual ice.

[0044] In this regard, with the artificial ice floor material 1, as described above, a fluororesin sheet can be attached to shoes, allowing people to slide on the artificial ice floor material 1 in the same way as on an ice surface, and by wearing shoes with rubber soles, the artificial ice floor material 1 can provide the same slip resistance and sliding properties as an ice surface.

[0045] Therefore, the artificial ice floor material 1 is suitable for practicing curling, a sport in which players wear shoes made of different materials on the left and right.

[0046] The surface layer 2 has a thickness of, for example, 0.1 mm or more, preferably 0.2 mm or more, and for example, 5 mm or less, preferably 0.5 mm or less.

[0047] The surface layer 2 contains a base resin and a silicone resin. The surface layer 2A may further contain a plasticizer, a filler, an antistatic agent, and an additive. Silicone resin is an insulating material and tends to accumulate static electricity, so it is preferable to include an antistatic agent. In particular, since a large amount of static electricity is generated when rubbed with a curling brush, it is preferable to add an antistatic agent to the artificial ice floor material for curling.

[0048] (1-1) Base resin The matrix resin is a thermoplastic resin, such as polyvinyl chloride, polyvinyl acetate, polyethylene, polypropylene, polymethacrylate, vinyl chloride-vinyl acetate copolymer, vinyl chloride-ethylene copolymer, vinyl chloride-propylene copolymer, vinyl chloride-styrene copolymer, vinyl chloride-isobutylene copolymer, vinyl chloride-vinylidene chloride copolymer, vinyl chloride-butadiene copolymer, vinyl chloride-isoprene copolymer, or vinyl chloride-chlorinated propylene copolymer.

[0049] The base resin may be used alone or in combination of two or more.

[0050] The base resin is preferably polyvinyl chloride. If the base resin of the surface layer 2 is polyvinyl chloride, the surface layer 2 will have excellent abrasion resistance, durability, and processability.

[0051] The average degree of polymerization of polyvinyl chloride is, for example, 800 or more, or preferably 1,000 or more.

[0052] When the average degree of polymerization of polyvinyl chloride is equal to or greater than the lower limit, the surface layer 2 is not too soft and has appropriate flexibility. In addition, the processability of the surface layer 2 can be improved, and shrinkage during processing can be suppressed.

[0053] The average degree of polymerization of polyvinyl chloride is, for example, 2000 or less, or preferably 1500 or less.

[0054] When the average degree of polymerization of polyvinyl chloride is equal to or greater than the lower limit, the surface layer 2 is not too hard and has appropriate flexibility.

[0055] The proportion of the base resin in the surface layer 2 is, for example, 30% by mass or more, preferably 40% by mass or more, and for example, 70% by mass or less, preferably 50% by mass or less. When the artificial ice floor material 1 is a composition vinyl floor tile, the proportion of the base resin in the surface layer 2 is, for example, 30% by mass or less, preferably 10% by mass or less.

[0056] (1-2) Silicone resin Examples of silicone resins include acrylic-silicone copolymers and modified silicones. Examples of acrylic-silicone copolymers include acrylic-silicone graft copolymers.

[0057] The number of parts of silicone resin per 100 parts by mass of base resin is more than 5 parts by mass, preferably 10 parts by mass or more, more preferably 30 parts by mass or more, and for example, 80 parts by mass or less, preferably 70 parts by mass or less, more preferably 60 parts by mass or less.

[0058] When the number of parts of silicone resin per 100 parts by mass of base resin is equal to or greater than the above lower limit, slipperiness equivalent to that of an ice surface can be obtained.When the number of parts of silicone resin per 100 parts by mass of base resin is equal to or less than the above upper limit, a decrease in strength of surface layer 2 can be suppressed, and sufficient durability can be obtained.

[0059] (1-3) Plasticizer The plasticizer imparts plasticity to the surface layer 2. Examples of the plasticizer include polyester-based plasticizers, glycerin-based plasticizers, polycarboxylic acid ester-based plasticizers, and polyalkylene glycol-based plasticizers. Preferably, the plasticizer is a polycarboxylic acid-based plasticizer, and preferably, a phthalate ester is used.

[0060] Examples of phthalate esters include dioctyl phthalate, bis(2-ethylhexyl) phthalate, and diisononyl phthalate.

[0061] There are no limitations on the blending ratio of the plasticizer in the surface layer 2. The number of parts of plasticizer per 100 parts by mass of the base resin is, for example, 3 parts by mass or more, preferably 25 parts by mass or more, and for example, 50 parts by mass or less, preferably 40 parts by mass or less. If the number of parts of plasticizer per 100 parts by mass of the base resin is within the above range, the artificial ice floor material 1 can be given appropriate flexibility as a floor material.

[0062] (1-4) Filler The filler is dispersed in the matrix resin and improves the processability of the surface layer 2 and the dimensional stability.

[0063] Examples of fillers include inorganic particles, such as calcium carbonate, magnesium carbonate, magnesium hydroxide, kaolin, silica, perlite, alumina, mica, boron nitride, aluminum nitride, and silicon nitride. Volcanic ash, which is primarily composed of silica and alumina, can also be used as the inorganic particles.

[0064] As the filler, preferably, calcium carbonate is used.

[0065] Examples of calcium carbonate include heavy calcium carbonate and light calcium carbonate. As calcium carbonate, calcium carbonate whose particle surface is not coated with an organic substance such as a fatty acid or a resin acid is preferably used. If the particle surface of calcium carbonate is not coated with an organic substance, the artificial ice floor material 1 can be given an appropriate sliding property.

[0066] The particle size of the filler is, for example, 5 μm or more, preferably 10 μm or more, and for example, 400 μm or less, preferably 100 μm or less, more preferably 30 μm or less. The "particle size" refers to the cumulative weight average value (D50) in particle size distribution measurement by laser diffraction method.

[0067] There are no limitations on the blending ratio of the filler in the surface layer 2. The number of parts of the heat dissipation material per 100 parts by mass of the base resin is, for example, 3 parts by mass or more, preferably 5 parts by mass or more, and for example, 60 parts by mass or less, preferably 40 parts by mass or less.

[0068] (1-5) Antistatic agents Antistatic agents include, for example, surfactants, ionic liquids, and conductive materials.

[0069] Examples of surfactants include ionic surfactants and nonionic surfactants. Examples of ionic surfactants include anionic surfactants, cationic surfactants, and amphoteric surfactants.

[0070] Examples of anionic surfactants include carboxylic acid type anionic surfactants, sulfonic acid type anionic surfactants, sulfate ester type anionic surfactants, and phosphate ester type anionic surfactants. Examples of carboxylic acid type anionic surfactants include ether carboxylates. Examples of sulfonic acid type anionic surfactants include alkanesulfonates. Examples of sulfate ester type anionic surfactants include alkyl sulfates. Examples of phosphate ester type anionic surfactants include alkyl phosphates.

[0071] Examples of cationic surfactants include alkylamine salt-type cationic surfactants and quaternary ammonium salt-type cationic surfactants. Examples of alkylamine salt-type cationic surfactants include monoalkylamine salts. Examples of quaternary ammonium salt-type cationic surfactants include alkyltrimethylammonium chloride.

[0072] Examples of amphoteric surfactants include alkyl betaine-type amphoteric surfactants and alkyl imidazolium betaine-type amphoteric surfactants. Examples of alkyl betaine-type amphoteric surfactants include alkyl dimethyl amino acetic acid betaine. Examples of alkyl imidazolium betaine-type amphoteric surfactants include 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolium betaine.

[0073] Examples of nonionic surfactants include polyethylene glycol-type nonionic surfactants and polyhydric alcohol-type nonionic surfactants. Examples of polyethylene glycol-type nonionic surfactants include higher alcohol ethylene oxide adducts and fatty acid ethylene oxide adducts. Examples of polyhydric alcohol-type nonionic surfactants include polyethylene oxide fatty acid esters, glycerin fatty acid esters, sorbit fatty acid esters, sorbitan fatty acid esters, and alkanolamine fatty amides.

[0074] Ionic liquids are salts (room-temperature molten salts) that are liquid at room temperature (usually 30°C) or relatively low temperatures (for example, 150°C or lower) and are composed of an anion component and a cation component. Ionic liquids are preferably liquid at 23°C.

[0075] Examples of ionic liquids include ammonium salts, imidazolium salts, pyrrolidinium salts, pyridinium salts, and phosphonium salts.

[0076] Examples of ammonium salts include butyltrimethylammonium bis(trifluoromethylsulfonyl)imide, tetrabutylammonium heptadecafluorooctanesulfonate, tetrabutylammonium nonafluorobutanesulfonate, tetrapentylammonium methanesulfonate, and tetrapentylammonium thiocyanate.

[0077] Examples of imidazolium salts include 1,3-dimethylimidazolium methyl sulfate, 1-ethyl-3-methylimidazolium bis(pentafluoroethylsulfonyl)imide, 1-ethyl-3-methylimidazolium bis(trifluoroethylsulfonyl)imide, 1-ethyl-3-methylimidazolium bromide, 1-ethyl-3-methylimidazolium chloride, 1-ethyl-3-methylimidazolium nitrate, and 1-ethyl-3-methylimidazolium hexafluorophosphate. 1-ethyl-3-methylimidazolium chloride, 1-ethyl-3-methylimidazolium nitrate, 1-ethyl-3-methylimidazolium hexafluorophosphate, 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3-methylimidazolium tosylate, 1-ethyl-3-methylimidazolium trifluoromethanesulfonate, 1-n-butyl-3-methylimidazolium trifluoromethanesulfonate, 1-butyl-3-methylimidazolium 1-Butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, 1-butyl-3-methylimidazolium bromide, 1-butyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium hexafluorophosphate, 1-butyl-3-methylimidazolium 2-(2-methoxyethoxy)ethyl sulfate, 1-butyl-3-methylimidazolium methyl sulfate, 1-butyl-3-methylimidazolium tetrafluoroborate, 1-hexyl-3-methylimidazolium chloride chloride, 1-hexyl-3-methylimidazolium hexafluorophosphate, 1-hexyl-3-methylimidazolium tetrafluoroborate, 1-methyl-3-octylimidazolium chloride, 1-methyl-3-octylimidazolium tetrafluoroborate, 1-butyl-2,3-dimethylimidazolium chloride, 1-butyl-2,3-dimethylimidazolium hexafluorophosphate, and 1-butyl-2,3-dimethylimidazolium tetrafluoroborate.

[0078] Examples of pyrrolidinium salts include 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide, 1-methyl-1-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide, and 1-butyl-1-methylpyrrolidinium chloride.

[0079] Examples of pyridinium salts include 3-methyl-1-propylpyridinium bis(trifluoromethylsulfonyl)imide, 1-butyl-3-methylpyridinium bis(trifluoromethylsulfonyl)imide, 1-butyl-4-methylpyridinium bis(trifluoromethylsulfonyl)imide, 1-propyl-3-methylpyridinium trifluoromethanesulfonate, 1-butyl-3-methylpyridinium trifluoromethanesulfonate, 1-butyl-4-methylpyridinium bromide, 1-butyl-4-methylpyridinium chloride, 1-butyl-4-methylpyridinium hexafluorophosphate, 1-butyl-3-methylpyridinium tetrafluoroborate, 1-butyl-4-methylpyridinium tetrafluoroborate, and 1-butylpyridinium tetrafluoroborate.

[0080] Examples of phosphonium salts include tetrabutylphosphonium methanesulfonate, tetrabutylphosphonium p-toluenesulfonate, trihexyltetradecylphosphonium bis(trifluoroethylsulfonyl)imide, trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl)phosphinate, trihexyltetradecylphosphonium bromide, trihexyltetradecylphosphonium chloride, trihexyltetradecylphosphonium decanoate, trihexyltetradecylphosphonium hexafluorophosphinate, triethyltetradecylphosphonium tetrafluoroborate, and tributylmethylphosphonium tosylate.

[0081] Furthermore, an example of a commercially available ionic liquid is PEL-25 (manufactured by Nippon Carlit Co., Ltd.).

[0082] Examples of conductive materials include organic materials having conductivity, such as conductive polymers, and inorganic materials having conductivity, such as carbon materials.

[0083] The antistatic agent may be used alone or in combination of two or more kinds.

[0084] As the antistatic agent, preferably, an ionic liquid is used.

[0085] If the antistatic agent is an ionic liquid, it can be uniformly dispersed in the base resin, thereby uniformly imparting antistatic properties to the surface 2A of the surface layer 2, and since it is less likely to bleed onto the surface, a decrease in antifouling properties can be suppressed.

[0086] The number of parts of the antistatic agent per 100 parts by mass of the base resin is, for example, 0.1 parts by mass or more, preferably 0.5 parts by mass or more, and for example, 3 parts by mass or less, preferably 2 parts by mass or less.

[0087] (1-6) Additives Additives include, for example, heat stabilizers, processing aids, stabilizers, flame retardants, antioxidants, lubricants, foaming agents, pigments, antibacterial agents, and mildew inhibitors.

[0088] (2) Fiber reinforcement layer The fiber reinforcement layer 3 is located in the thickness direction between the surface layer 2 and the back layer 4. The fiber reinforcement layer 3 can improve the dimensional stability of the artificial ice floor material 1.

[0089] The fiber-reinforced layer 3 may be a nonwoven fabric or a woven fabric. The fiber-reinforced layer 3 is preferably a nonwoven fabric containing glass fibers, and more preferably a nonwoven fabric whose fibers are made only of glass fibers, because this has excellent heat resistance and a high effect of suppressing dimensional change.

[0090] The basis weight of the fiber reinforced layer 3 is not limited. For example, the basis weight of the fiber reinforced layer 3 is 10 g / m 2 More than 20 g / m 2or more, for example, 100 g / m 2 Preferably, 50 g / m or less 2 When the basis weight of the fiber reinforcement layer 3 is equal to or greater than the above lower limit, it is possible to improve the dimensional stability of the artificial ice floor material 1. When the basis weight of the fiber reinforcement layer 3 is equal to or less than the above upper limit, it is possible to impart appropriate flexibility and processability to the artificial ice floor material 1.

[0091] The thickness of the fiber reinforcement layer 3 is not limited. The thickness of the fiber reinforcement layer 3 is, for example, 0.1 mm or more, preferably 0.15 mm or more, more preferably 0.2 mm or more, and for example, 0.5 mm or less, preferably 0.4 mm or less, more preferably 0.35 mm or less. When the thickness of the fiber reinforcement layer 3 is equal to or greater than the above lower limit, the dimensional stability of the artificial ice floor material 1 can be improved. When the thickness of the fiber reinforcement layer 3 is equal to or less than the above upper limit, the artificial ice floor material 1 can be given appropriate flexibility and processability.

[0092] (3) Back layer The back layer 4 supports the surface layer 2 and the fiber reinforcement layer 3. The back layer 4 is disposed on the back surface 2B of the surface layer 2 in the thickness direction of the artificial ice floor material 1.

[0093] The back layer 4 contains the above-mentioned thermoplastic resin as a base resin, and optionally the above-mentioned filler and plasticizer. The base resin of the back layer 4 is preferably polyvinyl chloride. When the base resin of the back layer 4 is polyvinyl chloride, the back layer 4 has excellent abrasion resistance, durability, and processability. The filler in the back layer 4 is preferably calcium carbonate.

[0094] Although FIG. 1 shows an example in which the back layer 4 is a single layer, the back layer 4 is not limited to this and may be made up of multiple layers.

[0095] The back layer 4 has a thickness of, for example, 0.5 mm or more, preferably 0.8 mm or more, and for example, 7.0 mm or less, preferably 5.0 mm or less.

[0096] 2. Manufacturing method of artificial ice floor material Next, a method for manufacturing the artificial ice floor material will be described.

[0097] The manufacturing method of the artificial ice floor material 1 includes, for example, a preparation step, a lamination step, an embossing step, and a cutting step.

[0098] (1) Preparation process In the preparation step, the surface layer 2 and the back layer 4 are prepared.

[0099] The surface layer 2 is formed, for example, by calendar molding. Specifically, the above-mentioned materials for the surface layer 2 are mixed in a Banbury mixer while being heated.

[0100] Next, the resulting mixture is kneaded with a mill roll while being heated.

[0101] Next, the obtained kneaded product is heated and molded into a sheet using a calender roll, to obtain the surface layer 2.

[0102] The back layer 4 is formed from the above-mentioned material for the back layer 4 by the above-mentioned calender molding.

[0103] (2) Lamination process In the laminating step, the surface layer 2 obtained in the preparation step, the fiber reinforcement layer 3, and the back layer 4 are laminated together by thermal lamination.

[0104] Specifically, the fiber reinforced layer 3 is laminated on the back layer 4 , and then the surface layer 2 is laminated on the fiber reinforced layer 3 .

[0105] In the lamination process, each layer is laminated by roll-to-roll, which allows the laminate of the back layer 4, fiber reinforcement layer 3, and surface layer 2 to be produced continuously.

[0106] (3) Embossing process In the embossing step, a predetermined embossed pattern is imparted to the surface layer 2 of the obtained laminate. To impart the embossed pattern, for example, an embossing roll is pressed against the surface layer 2 heated to a temperature equal to or higher than its softening temperature.

[0107] (4) Cutting process In the cutting step, the obtained laminate is cut into a predetermined shape and a predetermined size using a cutting machine such as a circle cutter or a guillotine cutter.

[0108] 3. Effects The surface layer 2 of the artificial ice floor material 1 contains a base resin and a silicone resin, and the number of parts of silicone resin per 100 parts by mass of the base resin is adjusted to 5 parts by mass or more.

[0109] As a result, a slipperiness equivalent to that of an ice surface can be achieved.

[0110] Furthermore, according to the artificial ice floor material 1, the surface 2A is embossed, and the arithmetic mean height (Sa) of the surface 2A is adjusted to be 0.5 μm or more and 30 μm or less, and the maximum height (Sz) of the surface 2A is adjusted to be 20 μm or more and 200 μm or less.

[0111] This allows for a tactile feel that is equivalent to that of ice surfaces used for ice sports.

[0112] 4. Variations A modified example will be described with reference to Fig. 3. In the modified example, the same members as those in the above-described embodiment are given the same reference numerals, and the description thereof will be omitted.

[0113] As shown in Figure 3, the artificial ice floor material 1 may have a design layer 5 between the surface layer 2 and the fiber reinforcement layer 3. In this case, the surface layer 2 is a transparent or semi-transparent clear layer. When the artificial ice floor material 1 has the design layer 5, the clear layer 3 is transparent or semi-transparent, and preferably transparent.

[0114] The design layer 5 is a layer for adding a design to the artificial ice floor material 1. A predetermined design is applied to one side of the design layer 5. Specifically, the design layer 5 is a resin sheet with a predetermined design applied to it. Examples of the design layer 5 include printed film and colored resin. Printed film is a resin sheet on which a desired pattern is drawn by applying ink to the resin base sheet. Colored resin is a resin such as polyvinyl chloride to which a coloring agent such as a pigment or dye is added to form a desired color or pattern. The colored resin may be a single-color resin sheet, or may be a resin sheet containing resin chips of multiple colors.

[0115] The thickness of the design layer 5 is, for example, 0.03 mm or more, preferably 0.05 mm or more, and for example, 0.50 mm or less, preferably 0.20 mm or less. [Example]

[0116] The present invention will be described in more detail below with reference to examples, but is not limited thereto. Specific numerical values ​​of blending ratios (content ratios), physical property values, parameters, etc. used in the following description can be replaced with the upper limit values ​​(numeric values ​​defined as "equal to or less than") or lower limit values ​​(numeric values ​​defined as "equal to or more than" or "exceeding") of the corresponding blending ratios (content ratios), physical property values, parameters, etc. described in the above "Modes for Carrying Out the Invention."

[0117] 1. Material Description (1) Base resin 1000Z (product name: ZEST 1000Z, polyvinyl chloride, average polymerization degree: 1000, manufactured by Shin-Dai-Ichi Vinyl Corporation) 800Y (product name: ZEST 800Y, polyvinyl chloride, average degree of polymerization: 820, manufactured by Shin-Dai-Ichi Vinyl Corporation) (2) Plasticizer DOP (trade name: DOP, dioctyl phthalate, manufactured by New Japan Chemical Co., Ltd.) (3) Silicone resin SX-005 (product name: Metablen SX-005, silicone-acrylic graft copolymer, manufactured by Mitsubishi Chemical Corporation) R170S (product name: Chaline R170S, manufactured by Nissin Chemical Industry Co., Ltd.) RU911 (product name: Chaline RU911, manufactured by Nissin Chemical Industry Co., Ltd.) (4) Filling material E200 (product name: Escalon 200, calcium carbonate, manufactured by Sankyo Flour Milling Co., Ltd.) G100 (product name: G100, calcium carbonate, manufactured by Sankyo Flour Milling Co., Ltd.) RE2315 (product name: RE#2315, calcium carbonate, manufactured by Mitsui Flour Mills) (5) Antistatic agent PEL-25 (product name: PEL-25, manufactured by Nippon Carlit Co., Ltd.) (6) Additives T4000 (product name: Chemicizer T4000, epoxidized soybean oil (heat stabilizer), manufactured by Sanwa Synthetic Chemical Industry Co., Ltd.) AP623G (product name: Adeka Stab AP623G, stabilizer, manufactured by Adeka Corporation) AC704 (product name: Adeka Stab AC704, stabilizer, manufactured by Adeka Corporation) PA60 (product name: Kane Ace PA60, processing aid, manufactured by Kaneka Corporation) 2. Manufacturing of artificial ice floor material The base resin, plasticizer, silicone resin, filler, and additives were mixed at 180°C in the blending parts (parts by mass) shown in Table 1 using a Banbury mixer.

[0118] Next, the resulting mixture was kneaded using a pair of mill rolls, one of which was at 150°C and the other at 90°C.

[0119] Next, the obtained kneaded product was formed into a sheet using a calendar roll (temperature: 165°C to 190°C) to obtain a surface layer with a thickness of 0.35 mm.

[0120] Next, the obtained surface layer and fiber reinforcement layer (glass fiber nonwoven fabric) were laminated onto a back layer (polyvinyl chloride, thickness: 1.35 mm) in the order of the fiber reinforcement layer and the surface layer.

[0121] This resulted in a laminate of the back layer, the fiber reinforcement layer, and the surface layer.

[0122] A predetermined embossing pattern was applied to the surface of the obtained laminate using an embossing roll. The applied embossing pattern is shown in Table 1 and will be described below.

[0123] Embossing pattern 1: Satin 1 Embossing pattern 2: Grain 1 Embossing pattern 3: Matte Embossing pattern 4: Mirror finish In this manner, the artificial ice floor materials of each example and each comparative example were manufactured.

[0124] 3. Evaluation (1) Surface roughness The arithmetic mean height (Sa) and maximum height (Sz) of the surface layer of the flooring materials obtained in Examples 1 to 16 and Comparative Examples 1 and 2 were measured using a laser microscope VK-X3000 (manufactured by Keyence Corporation) with measurement mode: laser confocal and objective lens: 20x magnification.

[0125] The arithmetic mean height (Sa) and maximum height (Sz) were calculated from a single measurement (n=1).

[0126] (2) Slipperiness Test pieces (30 cm x 30 cm) were cut out from the artificial ice flooring materials of each Example and Comparative Example.

[0127] The cut test pieces were subjected to a sliding test according to JIS A1454:2016 using the sliding pieces shown in Table 1 and with the surface conditions shown in Table 1.

[0128] <Sliding piece> Rubber sheet: Hardness A78, thickness 3mm to 6mm Sole: A fluororesin slider attached to the sole of curling shoes <Surface condition> Drying: Cleaned and dried (3) Surface texture The feel of the surface of the artificial ice flooring was evaluated by a sensory test conducted by curling experienced people, and was rated according to the following criteria.

[0129] <Evaluation criteria> 4: It has the same slipperiness as ice, and when rubbed with a brush, it has the same feel as curling ice.

[0130] 3: When you rub it with a brush, the texture is very different from curling ice.

[0131] 2: When scrubbing with a brush, it catches and creates resistance.

[0132] 1: When scrubbing with a brush, a large catch occurs and no sliding is felt at all.

[0133] [Table 1]

[0134] [Table 2]

[0135] [Table 3]

[0136] [Table 4] [Explanation of symbols]

[0137] 1. Imitation ice floor material 2 Surface layer

Claims

1. A surface layer having a surface that can come into contact with ice sports or ice play equipment, the surface layer contains a base resin and a silicone resin, A pseudo-ice floor material in which the number of parts of the silicone resin per 100 parts by mass of the base resin exceeds 5 parts by mass.

2. The surface is embossed, The arithmetic mean height (Sa) of the surface is 0.5 μm or more and 30 μm or less, The artificial ice floor material according to claim 1, wherein the maximum height (Sz) of the surface is 20 μm or more and 200 μm or less.

3. The artificial ice floor material according to claim 1, wherein in the slip resistance test specified in JIS A1454:2016, the slip resistance coefficient of the surface in a cleaned and dried state when a rubber sheet having a hardness of A78 and a thickness of 3 mm to 6 mm is used as the sliding piece is 0.60 or less.

4. The artificial ice floor material according to claim 1, wherein the surface layer further contains an antistatic agent.

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