Shock absorbing floor material

Abstract

To provide a shock-absorbing floor material excellent in anti-slip property and capable of easily moving heavy objects with casters.SOLUTION: In a shock-absorbing floor material 10 provided with an upper-floor material 11 arranged on the surface side, an underfloor base material 12 arranged on the floor surface side and made of a material softer than that of the upper-floor material 11, and an intermediate material 13 arranged between the upper-floor material 11 and the underfloor base material 12, a Coefficient of Slip Resistance (C.S.R) defined by the Japanese Industrial Standard "JIS A 1454" is 0.3 or more and 0.5 or less.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an impact-absorbing flooring material, and is particularly effective in reducing the risk of fractures caused by falls or the like.

Background Art

[0002] In recent years, hip fractures in the elderly have become a social problem, and hip fractures account for 10% of the factors leading to the need for care for the elderly. The fracture sites due to falls vary greatly depending on age, and the risk of femoral fractures increases rapidly after the age of 60. Femoral fractures require hospitalization and a long period of inability to walk, so there are many cases where they cause a state of being bedridden or a state of needing care such as dementia.

[0003]

[0004]

[0005]

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

[0007] By the way, in floor materials that reduce the risk of fractures, in addition to impact absorption, anti - slip properties are also important. The anti - slip property of a floor material can be indicated by the coefficient of sliding resistance (C.S.R) defined in the Japanese Industrial Standard "JIS A 1454 (Test Method for Polymer - based Flooring Materials)" and can be evaluated as a reference value for the difficulty of slipping assuming walking.

[0008] Therefore, when trying to increase the C.S.R to improve anti - slip properties, when moving a heavy object with casters as described above, due to the large sliding resistance, it may become difficult to move.

[0009] For this reason, an object of the present invention is to provide an impact - absorbing floor material that is excellent in anti - slip properties and can easily move a heavy object with casters. [Means for Solving the Problems]

[0010] In the impact - absorbing floor material according to the present invention for solving the above - described problems, the impact - absorbing floor material includes a floor surface material disposed on the surface side, a floor base material disposed on the floor surface side and made of a softer material than the floor surface material, and an intermediate material disposed between the floor surface material and the floor base material. The coefficient of sliding resistance (C.S.R) defined in the Japanese Industrial Standard "JIS A 1454" is characterized by being 0.3 or more and 0.5 or less.

[0011] Further, the shock-absorbing floor material according to the present invention, in the shock-absorbing floor material described above, a plurality of convex embossments are formed on the surface of the floor material, and the embossments preferably have a square shape in plan view, a height of 10 μm or more and 100 μm or less, a width of 15 μm or more and 300 μm or less, and an adjacent interval of 50 μm or more and 1200 μm or less.

[0012] Further, the shock-absorbing floor material according to the present invention, in the shock-absorbing floor material described above, the thickness of the floor material preferably is 0.1 mm or more and 5 mm or less.

[0013] Further, the shock-absorbing floor material according to the present invention, in the shock-absorbing floor material described above, the bending rigidity per unit width of the intermediate material is 2 10 Nm 2 or more and 100 Nm

[0014] Further, the shock-absorbing floor material according to the present invention, in the shock-absorbing floor material described above, the thickness of the intermediate material preferably is 2 mm or more and 8 mm or less.

[0015] Further, the shock-absorbing floor material according to the present invention, in the shock-absorbing floor material described above, the intermediate material preferably is made of a resin base material obtained by mixing a resin material and an inorganic filler.

[0016] Further, the shock-absorbing floor material according to the present invention, in the shock-absorbing floor material described above, the intermediate material preferably contains 30 mass% or more and 85 mass% or less of the inorganic filler.

[0017] Further, the shock-absorbing floor material according to the present invention, in the shock-absorbing floor material described above, the Asker C hardness of the floor base material preferably is 20 or more and 60 or less.

[0018] Further, the shock-absorbing floor material according to the present invention, in the shock-absorbing floor material described above, the thickness of the floor base material preferably is 4 mm or more and 15 mm or less.

Advantages of the Invention

[0019] According to the shock-absorbing floor material of the present invention, since the coefficient of slip resistance (C.S.R) is 0.3 or more and 0.5 or less, it enables safe walking without slipping while facilitating the movement of heavy objects with casters such as electric nursing beds and food delivery carts. Therefore, it has excellent anti-slip properties and can easily move heavy objects with casters.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0021] Embodiments of the shock-absorbing floor material according to the present invention will be described with reference to the drawings. It should be noted that the present invention is not limited to the following embodiments described with reference to the drawings, and various technical matters described in the embodiments can be combined or replaced as appropriate as needed.

[0022] [Main Embodiments] Main embodiments of the shock-absorbing floor material according to the present invention will be described with reference to FIGS. 1 and 2.

[0023] 〈Overall Configuration of the Shock-Absorbing Floor Material〉 As shown in FIG. 1, the shock-absorbing floor material 10 includes a floor material 11 disposed on the surface side, a floor base material 12 disposed on the floor surface side and made of a softer material than the floor material 11, and an intermediate material 13 disposed between the floor material 11 and the floor base material 12.

[0024] 〈Floor Material 11〉 The floor material 11 is a layer that constitutes the surface of the shock-absorbing floor material 10, and is responsible for various surface functions such as design, scratch resistance, stain resistance, and anti-slip properties. Compared with the floor underlayment 12, the floor material 11 is preferably made of a hard material, such as resin materials like polypropylene, polyethylene, polyester, acrylic, polyvinyl chloride, or paper materials.

[0025] The floor material 11 preferably has a thickness of 0.1 mm or more and 5 mm or less. A thickness of 0.1 mm or more is preferable because it is difficult to cause discomfort during walking due to wear, damage, etc. A thickness of 5 mm or less is preferable because it can reduce the weight load and the burden during construction.

[0026] The floor material 11 can have a multilayer structure including a base material layer 11A having concealability, a pattern layer 11B provided on the base material layer 11A, a transparent resin layer 11C provided on the pattern layer 11B, and a surface protection layer 11D provided on the transparent resin layer 11C, as shown in FIG. 2, in addition to a single-layer structure.

[0027] Examples of the base material layer 11A include resin materials such as polyolefin, polyester, polyacrylic, polyamide, polyurethane, polystyrene, woven fabrics, non-woven fabrics, and paper materials. The base material layer 11A can also be colored with a colorant or the like as needed. Further, the base material layer 11A is preferably subjected to surface treatment such as corona discharge treatment, plasma treatment, or ozone treatment.

[0028] The base material layer 11A preferably has a thickness of 5 μm or more and 20 μm or less. A thickness of 5 μm or more is preferable because it is difficult to be affected by wear, damage, etc. associated with walking. A thickness of 20 μm or less is preferable because it can suppress an increase in the weight load.

[0029] The material of the pattern layer 11B, that is, the printing ink, can include, as the vehicle, chlorinated polyolefins such as chlorinated polyethylene and chlorinated polypropylene, polyester, polyurethane, polyacrylic, polyamide, polyvinyl acetate, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, cellulose-based resins, and the like. By mixing a vehicle containing one or more of these resins with pigments, solvents, various auxiliary agents, etc., printing ink can be obtained.

[0030] The pattern layer 11B is appropriately provided with a thickness within a range that can impart the required design characteristics, and there is no particular limitation on the thickness. Generally, it has a thickness of about 2 μm or more and 100 μm or less.

[0031] The transparent resin layer 11C is not particularly limited as long as it is a resin material having transparency. For example, it can include soft, semi-hard, or hard polyvinyl chloride, polyolefins such as polyethylene and polypropylene, polyethylene terephthalate, polybutylene terephthalate, polyamide, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-acrylic acid ester copolymer, ionomer, acrylate ester, methacrylate ester, and the like. Among them, polyolefin-based resins such as polypropylene are preferable.

[0032] The transparent resin layer 11C is not particularly limited as long as it has a thickness sufficient for forming the emboss 11a described later. Generally, it has a thickness of about 30 μm or more and about 300 μm.

[0033] The surface protection layer 11D is provided to impart surface physical properties such as scratch resistance, abrasion resistance, water resistance, and stain resistance. The surface protection layer 11D is preferably a curable resin such as a thermosetting type or an ionizing radiation curable type. Examples of the curable resin include unsaturated polyester resin, polyurethane resin, epoxy resin, aminoalkyd resin, phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, melamine-urea copolymer resin, silicone resin, polysiloxane resin, and the like.

[0034] The surface protective layer 11D is not particularly limited as long as it has a thickness within a range that allows the embossment 11a described later to be formed without problems. Generally, it has a thickness of about 1 μm or more and about 30 μm or less.

[0035] The floor material 11 has a plurality of convex embossments 11a formed on its surface. In the case of a multilayer structure, after forming the embossment 11a on the transparent resin layer 11C, the surface protective layer 11D is provided on the transparent resin layer 11C. The embossment 11a can be easily formed, for example, in the case of a multilayer structure, by heating and pressing the transparent resin layer 11C with an embossing mold, or by pressing the transparent resin layer 11C immediately after being extruded from an extruder with an embossing roll or the like.

[0036] The embossment 11a is set to a shape and dimensions capable of exhibiting anti-slip properties. Specifically, as shown in FIG. 3, an embossment 11a having a square shape in plan view with a height h of 10 μm or more and 100 μm or less, a width w of 15 μm or more and 300 μm or less, and an adjacent interval d of 50 μm or more and 1200 μm or less is particularly preferable because it can most effectively exhibit necessary and sufficient anti-slip properties.

[0037] 〈Floor underlay material 12〉 The floor underlay material 12 is a layer that constitutes the base of the back surface of the shock-absorbing floor material 10 and has a function of absorbing shock by deforming when a person falls and alleviating the shock to the fallen person. The floor underlay material 12 is formed of a resin material softer than the floor material 11 so as to be deformable when a person falls. For example, it is preferably a soft thermoplastic resin such as polyolefin (e.g., polyethylene or polypropylene), polyvinyl chloride, ethylene-vinyl acetate copolymer, polystyrene, or polyurethane. The floor underlay material 12 preferably has a foamed structure such as independent foaming or continuous foaming by chemical foaming, physical foaming, supercritical foaming, or the like.

[0038] The floor underlayment 12 preferably has an Asker C hardness of 20 or more and 60 or less. If it is less than 20, the floor underlayment 12 is likely to deform, causing discomfort when walking and making it easier for pedestrians to lose their balance and fall, which may lead to a decrease in safety and the like, so it is not preferable. If it exceeds 60, there is a possibility that the shock absorption performance cannot be fully exhibited when an impact is applied, so it is not preferable.

[0039] Note that the "Asker C hardness" is a value measured with an Asker C hardness tester, and this "Asker C hardness tester" is a measuring instrument for measuring hardness and is one of the durometers (spring hardness testers) defined in the Japan Rubber Association Standard "SRIS 0101".

[0040] The floor underlayment 12 preferably has a thickness of 4 mm or more and 15 mm or less. If it is less than 4 mm, it is difficult to sufficiently obtain a buffering effect during a fall, so it is not preferable. If it exceeds 15 mm, there is a possibility that the deformation due to the load becomes too large, causing a decrease in load-bearing capacity, and at the same time, the sinking during walking becomes too large, making it easier to fall, so it is not preferable.

[0041] 〈Intermediate material 13〉 The intermediate material 13 is a layer interposed between the floor surface material 11 and the floor underlayment 12, supports the floor surface material 11 on the floor underlayment 12 so as to disperse the load applied from the floor surface material 11 to the floor underlayment 12, and has a function of improving shock absorption and load-bearing capacity. The intermediate material 13 is composed of a resin base material obtained by mixing a resin material and an inorganic filler so as to exhibit the desired mechanical properties and thermal expansion properties.

[0042] Examples of the resin material include various polyolefins such as polyethylene and polypropylene, polyvinyl chloride, polycarbonate, polyethylene terephthalate, polymethyl methacrylate, ABS resin, and various polyamides. Among them, considering versatility, mechanical properties, thermal expansion properties, etc., polyolefins and polyvinyl chloride are preferable, and particularly, polyvinyl chloride is more preferable.

[0043] Examples of the inorganic filler include silica, talc, calcium carbonate, barium sulfate, aluminum hydroxide, carbon fiber, glass fiber, etc. Among them, calcium carbonate, which is excellent in processability and has versatility, is preferable. The intermediate material 13 preferably contains the inorganic filler in an amount of 30% by mass or more and 85% by mass or less, and more preferably 50% by mass or more and 85% by mass or less.

[0044] The intermediate material 13 preferably has a thickness of 2 mm or more and 8 mm or less. If it is less than 2 mm, the deflection becomes too large during a fall, making it difficult to produce a sufficient buffering effect and causing a risk of damage. If it exceeds 8 mm, the mass becomes too large, easily causing deterioration of workability during construction, and it becomes difficult to effectively produce load dispersion when an impact is applied, resulting in a risk of difficulty in obtaining a sufficient buffering effect.

[0045] The intermediate material 13 has a flexural rigidity per unit width of 10 Nm 2 or more and 100 Nm 2 or less, which is preferable. If it is less than 10 Nm, it becomes easily deflectable against a local impact, easily causing a decrease in load dispersibility and a risk of difficulty in obtaining sufficient shock absorbency. If it exceeds 100 Nm, it easily causes deterioration of workability and a risk of easy fatigue during walking. 2 If it is less than 10 Nm 2 it becomes easily deflectable against a local impact, easily causing a decrease in load dispersibility and a risk of difficulty in obtaining sufficient shock absorbency. If it exceeds 100 Nm, it easily causes deterioration of workability and a risk of easy fatigue during walking.

[0046] 〈Impact-absorbing floor material 10〉 The impact-absorbing floor material 10 preferably has a thickness exceeding 7 mm and 25 mm or less. If it exceeds 7 mm, the balance of shock absorbency, walking feeling, and durability is good, which is preferable. If it is 25 mm or less, the step with the adjacent non-construction part can be within the allowable range, and the fit during construction is good, which is preferable.

[0047] The shock-absorbing flooring material 10 has a coefficient of sliding resistance (C.S.R) defined in the Japanese Industrial Standard "JIS A 1454 (Test Methods for Polymer-Based Flooring Materials)" of 0.3 or more and 0.5 or less. If the C.S.R is less than 0.3, sufficient anti-slip properties cannot be obtained, and if the C.S.R exceeds 0.5, it becomes difficult to move heavy objects with casters such as electric care beds and meal delivery carts.

[0048] <Manufacturing Method of Shock-Absorbing Flooring Material 10> In such a shock-absorbing flooring material 10 according to this embodiment, the floor surface material 11, the floor base material 12, and the intermediate material 13 are adhered and laminated to each other via an adhesive, an adhesive tape, etc., and basically can be manufactured. In addition, it is also possible to continuously thermally laminate the floor surface material 11 to the intermediate material 13 during the manufacture of the intermediate material 13.

[0049] When the floor surface material 11 has a multilayer structure, for example, first, a pattern layer 11B is printed on a base material layer 11A with printing ink. Next, a thermoplastic resin is melt-extruded and laminated on the pattern layer 11B to form a transparent resin layer 11C, and at the same time, an embossing plate is pressed on the transparent resin layer 11C to form an embossing 11a. Then, an ultraviolet curable resin is applied on the transparent resin layer 11C and then irradiated with ultraviolet rays to be cured to provide a surface protection layer 11D. Thereby, the floor surface material 11 having a multilayer structure can be manufactured.

[0050] <Effect of Shock-Absorbing Flooring Material 10> In the shock-absorbing flooring material 10 according to this embodiment manufactured in this way, since the C.S.R is 0.3 or more and 0.5 or less, while enabling safe walking without slipping, it is possible to facilitate the movement of heavy objects with casters such as electric care beds and meal delivery carts.

[0051] Therefore, according to the shock-absorbing flooring material 10 according to this embodiment, it not only has excellent shock absorption and load-bearing properties, but also has excellent anti-slip properties and can easily move heavy objects with casters.

Example

[0052] Specific examples of the shock-absorbing floor material according to the present invention will be specifically described, but the present invention is not limited only to the following specific examples described.

[0053] [Preparation of Specimens and Comparative Specimens] 〈Specimen 1〉 A random polypropylene sheet (thickness 70 μm) containing a pigment is used as a base material layer, and a wood grain pattern is gravure-printed with urethane ink on the base material layer to form a pattern layer. Subsequently, while forming a transparent resin layer by extruding a homopolypropylene resin on the pattern layer by an extrusion lamination method, a convex embossing plate having a large number of square cells formed on the surface is pressed against the transparent resin layer, whereby a convex emboss is formed on the surface of the transparent resin layer. At this time, the transparent resin layer had a thickness of 140 μm, the height (h) of the emboss (convex portion) was 50 μm, the width (w) of the emboss (convex portion) was 100 μm, and the interval (d) between adjacent embosses (convex portions) was 200 μm.

[0054] Next, an ultraviolet curable resin in which 20 parts by mass of pentaerythritol tetraacrylate, 0.5 parts by mass of a benzophenone-based photopolymerization initiator, 0.5 parts by mass of a benzotriazole-based ultraviolet absorber, 0.5 parts by mass of a hindered amine-based light stabilizer, and 2 parts by mass of a scaly quartz-based filler (length 1 μm) are respectively mixed with 100 parts by mass of urethane acrylate is applied to the surface of the transparent resin layer so as to have a cured thickness of 5 μm, and then irradiated with ultraviolet rays by a metal halide lamp to be cured, thereby forming a surface protective layer. Thus, a floor material (length 450 mm, width 450 mm, thickness 0.22 mm) of Specimen 1 having a multilayer structure was obtained.

[0055] Then, a polyethylene foam (Asker C hardness 40, length 450 mm, width 450 mm, thickness 8 mm) is prepared as a floor underlay material, and a rigid polyvinyl chloride resin plate (inorganic filler (talc) content 75% by mass, flexural rigidity 43.7 Nm 2, a material with a length of 450 mm, a width of 450 mm, and a thickness of 4 mm was prepared as an intermediate material. The floor base material and the intermediate material were adhered with a two-component curable urethane-based adhesive to form a floor material panel. The above floor covering material was adhered to the intermediate material side of this floor material panel through the adhesive "US Cement (trade name)" manufactured by Tokiwa Corporation, thereby producing Test Specimen 1 of the shock-absorbing floor material. The coefficient of slip resistance (C.S.R) was 0.41.

[0056] 〈Test Specimen 2〉 Test Specimen 2 of the shock-absorbing floor material was produced in the same manner as Test Specimen 1, except that the embossments (protrusions) formed on the surface protection layer of the floor covering material had a height (h) of 50 μm, a width (w) of 150 μm, and a spacing (d) of 200 μm. The coefficient of slip resistance (C.S.R) was 0.35.

[0057] 〈Test Specimen 3〉 Test Specimen 3 of the shock-absorbing floor material was produced in the same manner as Test Specimen 1, except that the embossments (protrusions) formed on the surface protection layer of the floor covering material had a height (h) of 50 μm, a width (w) of 100 μm, and a spacing (d) of 1200 μm. The coefficient of slip resistance (C.S.R) was 0.32.

[0058] 〈Comparative Specimen 1〉 Comparative Specimen 1 of the shock-absorbing floor material was produced in the same manner as Test Specimen 1, except that the embossments (protrusions) formed on the surface protection layer of the floor covering material had a height (h) of 50 μm, a width (w) of 10 μm, and a spacing (d) of 200 μm. The coefficient of slip resistance (C.S.R) was 0.28.

[0059] 〈Comparative Specimen 2〉 Comparative Specimen 2 of the shock-absorbing floor material was produced in the same manner as Test Specimen 1, except that the embossments (protrusions) formed on the surface protection layer of the floor covering material had a height (h) of 200 μm, a width (w) of 100 μm, and a spacing (d) of 200 μm. The coefficient of slip resistance (C.S.R) was 0.60.

[0060] 〈Comparative Specimen 3〉 A comparative body 3 of the shock-absorbing flooring material was produced in the same manner as test body 1, except that the embossments (protrusions) formed on the surface protection layer of the flooring material had a height (h) of 5 μm, a width (w) of 100 μm, and a spacing (d) of 200 μm. The coefficient of slip resistance (C.S.R) was 0.29.

[0061] 〈Comparative body 4〉 An attempt was made to produce a comparative body 4 of the shock-absorbing flooring material in the same manner as test body 1, except that the embossments (protrusions) formed on the surface protection layer of the flooring material had a height (h) of 50 μm, a width (w) of 400 μm, and a spacing (d) of 200 μm. However, due to the fact that the volume of the embossments (protrusions) was too large, it was not possible to form the embossments (protrusions) into a proper shape, and the intended comparative body 4 could not be obtained.

[0062] 〈Comparative body 5〉 A comparative body 5 of the shock-absorbing flooring material was produced in the same manner as test body 1, except that the embossments (protrusions) formed on the surface protection layer of the flooring material were omitted, i.e., no embossments (protrusions) were formed. The coefficient of slip resistance (C.S.R) was 0.24.

[0063] 《Coefficient of slip resistance (C.S.R) of test bodies and comparative bodies》 The coefficient of slip resistance (C.S.R) is the average value measured three times under the following conditions in accordance with the test method specified in "JIS A 1454".

[0064] ·Testing machine / Portable slip tester "ONO·PPSM (product name)" manufactured by Tohoku Sokki Co., Ltd. ·Sliding piece / Body: Foamed polyurethane rubber sheet (Shore A hardness 10, thickness 10 mm) Coating: Cotton socks Weight: 20 kg (total value with weight)

[0065] [Evaluation method] 〈Walkability〉 On the test specimens and comparative specimens, the walking performance (slip resistance) when 10 testers walked wearing cotton socks was subjectively evaluated. The results are shown in Table 1. In Table 1, "〇" indicates the case where the number of people who evaluated the walking performance as good was 7 or more, "△" indicates the case where the number of people who evaluated the walking performance as good was 5 to 6, and "×" indicates the case where the number of people who evaluated the walking performance as good was 4 or less.

[0066] 〈Caster Mobility〉 A caster-equipped cart (caster width 45 mm, caster diameter 150 mm, number of casters 4) was placed on the test specimens and comparative specimens, and a 100 kg weight was placed on the loading platform. Then, the mobility (ease of movement) when 10 testers pushed the cart by hand was subjectively evaluated. The results are shown in Table 1. In Table 1, "〇" indicates the case where the number of people who evaluated the mobility as good was 7 or more, "△" indicates the case where the number of people who evaluated the mobility as good was 5 to 6, and "×" indicates the case where the number of people who evaluated the mobility as good was 4 or less.

[0067] [Evaluation Results] The test results of the above tests are shown in Table 1. In the comprehensive evaluation of Table 1, "○" indicates that both the walking performance and the caster mobility were good (○), and "×" indicates that both the walking performance and the caster mobility did not become good (○).

[0068]

Table 1

[0069] As shown in Table 1, in Comparative Specimens 1, 3, and 5, since the C.S.R was less than 0.3, the only item evaluated as good was the caster mobility. Also, in Comparative Specimen 2, since the C.S.R exceeded 0.5, there were no items evaluated as good. Therefore, in all comparative specimens, the comprehensive evaluation was "not acceptable (×)".

[0070] On the other hand, in Test Specimens 1 to 3, since the C.S.R. was 0.3 or more and 0.5 or less, it was evaluated that both the walking property and the caster mobility were good. Therefore, in all the test specimens, the comprehensive evaluation was "good (○)".

[0071] From the above, it was confirmed that the shock-absorbing flooring material according to the present invention is excellent in anti-slip property and can easily move a heavy object with casters.

Industrial Applicability

[0072] The shock-absorbing flooring material according to the present invention is excellent in anti-slip property and can easily move a heavy object with casters, so it can be extremely beneficially used in various industries.

Explanation of Signs

[0073] 10 Shock-absorbing flooring material 11 Floor covering 11a Emboss (protrusion) 11A Base material layer 11B Pattern layer 11C Transparent resin layer 11D Surface protection layer 12 Floor underlayment 13 Intermediate material

Claims

1. A floor covering disposed on the surface side, A floor base material disposed on the floor surface side and made of a softer material than the floor covering, An intermediate material disposed between the floor covering and the floor base material In an impact-absorbing floor material provided with, The slip resistance coefficient (C.S.R) defined by Japanese Industrial Standard "JIS A 1454" is 0.3 or more and 0.5 or less An impact-absorbing floor material characterized by this.

2. The floor covering has a plurality of convex embossments formed on the surface, The embossments are square in plan view, have a height of 10 μm or more and 100 μm or less, a width of 15 μm or more and 300 μm or less, and an adjacent interval of 50 μm or more and 1200 μm or less The impact-absorbing floor material according to Claim 1, characterized by this.

3. The floor covering has a thickness of 0.1 mm or more and 5 mm or less The impact-absorbing floor material according to Claim 1, characterized by this.

4. The intermediate material has a flexural rigidity per unit width of 10 Nm ２ or more and 100 Nm ２ or less The impact-absorbing floor material according to Claim 1, characterized by this.

5. The intermediate material has a thickness of 2 mm or more and 8 mm or less The impact-absorbing floor material according to Claim 1, characterized by this.

6. The intermediate material is made of a resin base material obtained by mixing a resin material and an inorganic filler The impact-absorbing floor material according to Claim 1, characterized by this.

7. The intermediate material contains 30% by mass or more and 85% by mass or less of the inorganic filler The impact-absorbing floor material according to Claim 6, characterized by this.

8. The floor base material has an Asker C hardness of 20 or more and 60 or less The impact-absorbing floor material according to Claim 1, characterized by this.

9. The floor base material has a thickness of 4 mm or more and 15 mm or less The impact-absorbing floor material according to Claim 1, characterized by this.

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