Quick-drying sheet material

Abstract

To provide a quick-drying sheet material capable of disappearing in an extremely short time even when a puddle derived from rainwater or the like is formed.SOLUTION: Provided is a quick-drying sheet material comprising at least a flexible base material and a flexible surface material having 10 or more horizontal grooves and vertical grooves per unit length, wherein widths of the horizontal grooves and the vertical grooves as grooves are each within a range of 0.2 to 1.2 mm, a surface of the flexible surface material is provided with convex portions, and an area ratio (φ1) of the convex portions per unit area (100%) is within a range of 70 to 90%.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a quick-drying sheet product. More specifically, the present invention relates to a quick-drying sheet material that can make puddles caused by rainwater (including tap water) disappear in an extremely short time after they are formed. [Background technology]

[0002] Conventionally, various water-repellent building materials and water-repellent sheet-like materials have been proposed as quick-drying flooring materials. For example, a building material has been proposed for use on bathroom floors, etc., which allows residual water remaining on the surface to dry quickly, maintaining a hygienic condition for a long period of time (see, for example, Patent Document 1). More specifically, the building material is composed of units with a groove width of 0.5 mm or more and 3 mm or less, a groove depth of 0.5 mm or more and 2 mm or less, and island-shaped anti-slip protrusions surrounded by the grooves measuring 5 mm x 5 mm or more and 25 mm x 25 mm or less. The surface shape of the building material on which the grooves and island-shaped anti-slip convex portions are formed is a single or combination of shapes such as a dome shape or a bell shape that is high in the center and slopes downward toward the peripheral edges, and the grooves are multidirectional, allowing water from the island-shaped anti-slip convex portions to flow smoothly from the grooves into the joints between building materials.

[0003] Furthermore, as a flooring material for use in bathroom washing areas, etc., a surface material and bathroom washing area floor have been proposed that can be manufactured by a simple method and has hydrophilic drainage grooves and convex portions with surface properties different from those of the drainage grooves (see, for example, Patent Document 2). More specifically, it is a surface material for bathroom washing area floors, characterized in that it comprises a laminated material including an upper sheet that forms the outermost surface of the bathroom washing area floor, and a lower sheet that is laminated underneath the upper sheet and has a higher hydrophilicity than the upper sheet, and the upper sheet has a recessed drain groove that exposes part of the lower sheet.

[0004] In addition, a floor sheet for a washroom has been proposed that can be used to easily renovate the floor of a washroom into one that has good drainage and excellent design properties by attaching a floor sheet for a washroom with a textured pattern on the surface (see, for example, Patent Document 3). More specifically, the surface of the wash area floor sheet is formed with an uneven pattern that improves drainage, and running water flowing through the narrow groove-like channels that are the recesses of the uneven pattern attracts water droplets present on the surface of the protrusions into the channels, improving drainage, and the wash area floor sheet has cuts formed in it that correspond to the drain outlets and has cut-out pieces attached. The cut piece is then attached so that it hangs down from the lowest surface of the washroom floor along the side wall surface of the drain outlet, so that water that flows through the flow path formed by the uneven pattern of the washroom floor sheet flows into the drain outlet through the flow path formed by the uneven pattern formed on the cut piece without stagnating. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 3671975 (Claims, etc.) [Patent Document 2] JP 2010-281032 A (Claims, etc.) [Patent Document 3] JP 2006-63554 A (Claims, etc.) Summary of the Invention [Problem to be solved by the invention]

[0006] However, the building material described in Patent Document 1 is basically composed of square units having island-shaped anti-slip protrusions of a certain size, and these are mainly composed of hydrophilic inorganic materials such as ceramics, or are tile-shaped and are derived from a combination of FRP resin or the like and hydrophilic inorganic materials. As a result, it is extremely hard, and lacks vibration absorption when transporting cargo, ease of handling (construction), and walkability. Although it can be used for small areas such as bathrooms, it cannot be processed into rolls, and is not suitable for large areas such as veranda sheets or corridor sheets. Furthermore, since the product basically uses a large amount of hydrophilic inorganic materials and is formed by firing them at high temperatures of 1200°C or higher, it is not only difficult to make it lightweight, but also difficult to manufacture it stably with a high yield.

[0007] Furthermore, the flooring material described in Patent Document 2 basically comprises a sheet-like flooring material consisting of an upper sheet with a slit on the outermost surface and a lower sheet that is more hydrophilic than the upper sheet, and also has a drainage groove below it. As a result, the structure of the sheet flooring material is complex, it is quite thick, and it lacks cushioning and ease of handling, making it unsuitable for large-area installations such as veranda sheets or corridor sheets. Moreover, since the product is basically constructed using a relatively large amount of hydrophilic inorganic material, it is difficult to make it lightweight or flexible, and there are also problems in that it is difficult to manufacture it stably and with a high yield.

[0008] Furthermore, the flooring material described in Patent Document 3 basically comprises a sheet-like flooring material having a plurality of water-repellent recesses arranged on a sheet substrate, with flow paths formed between adjacent recesses, and also has drainage outlets on the sides of the sheet-like flooring material via cutout pieces. Therefore, it is difficult to process into a roll, and there are problems such as poor handling and it is not suitable for use in large areas such as veranda sheets or corridor sheets. Moreover, since the product is basically constructed using a relatively large amount of hydrophilic inorganic material, it is difficult to make it lightweight or flexible, and there are also problems in that it is difficult to manufacture it stably and with a high yield.

[0009] Therefore, the inventors of the present invention discovered that by forming convex portions of a predetermined area ratio on a flexible substrate using the same flexible material and dividing them into grooves (horizontal grooves and vertical grooves) of a predetermined width, a quick-drying sheet can be obtained that can eliminate puddles caused by rainwater, etc. in an extremely short time without using large amounts of hydrophilic inorganic materials, etc., and thus completed the present invention.

[0010] In other words, according to the present invention, the sheet-like material has convex portions with a predetermined area ratio, which are partitioned by grooves (horizontal grooves and vertical grooves) of a predetermined number and width and are provided on a flexible substrate, and the object is to provide a quick-drying sheet material that can effectively utilize capillary action, etc., to make even a certain puddle disappear in an extremely short time. [Means for solving the problem]

[0011] According to the present invention, there is provided a quick-drying sheet material comprising at least a flexible substrate and a flexible surface material having ten or more interconnected horizontal grooves and ten or more vertical grooves per unit length (100 mm), wherein the widths of the horizontal and vertical grooves are each within a range of 0.2 to 1.2 mm, and convex portions defined by the horizontal and vertical grooves are formed on the surface of the flexible surface material, and the area ratio (φ1) of the convex portions per unit area is within a range of 70 to 90%, thereby solving the above-mentioned problems. That is, in a quick-drying sheet material, by providing a predetermined number of horizontal grooves and vertical grooves of a predetermined width (t3) that run through each other, and specifying the area ratio (φ1) of the convex portions formed by these grooves, it is possible to effectively utilize capillary action, etc., even with a simple structure, and to make predetermined puddles, etc. disappear in an extremely short time, even at relatively low temperatures or room temperature. In addition, the width of the interconnected horizontal and vertical grooves, the area ratio of the convex portions, and other values ​​can be easily and accurately adjusted by appropriately adjusting the embossing conditions (pressure, temperature, type of shaping mold), the type of constituent material of the flexible base material and flexible surface material, processability, etc.

[0012] Furthermore, when constructing the quick-drying sheet material of the present invention, it is preferable that the area ratio (φ2) of the area on the surface of the flexible surface material that is 0.3 mm or less in height from a predetermined position per unit area is within the range of 10 to 40%. In this way, by limiting the proportion of the area below a predetermined height from the bottom surface position of the groove in the flexible surface material, capillary action can be more effectively utilized, and predetermined puddles, etc. can be eliminated in an extremely short time. In addition, the area ratio (φ2) of the region 0.3 mm or less in height from the specified position can be easily and accurately adjusted by appropriately adjusting the embossing conditions (pressure, temperature, type of molding die), the thickness of each of the flexible substrate and flexible surface material, the type of constituent material of each of the flexible substrate and flexible surface material, processability, etc.

[0013] Furthermore, when constructing the quick-drying sheet material of the present invention, it is preferable that the rectangular patterns defined by the horizontal and vertical grooves include a first rectangular pattern having a size of at least 0.6 cm x 0.6 cm or less and a second rectangular pattern having a size of at least 0.8 cm x 0.8 cm. By having multiple rectangular patterns with different areas in this way, regardless of the size of a given puddle or the like, it is possible to more effectively utilize mainly capillary action, make it possible to eliminate it in an extremely short time, and also improve the design.

[0014] In constructing the quick-drying sheet material of the present invention, it is preferable that the surface of the protruding portion of the flexible surface material has auxiliary protrusions in the form of lines and / or dots. By providing auxiliary protrusions of a predetermined shape on the surface of the convex portion in this manner, not only can the capillary phenomenon be utilized, but also the slopes and sides caused by the auxiliary protrusions can be used for drainage, and puddles and the like can be eliminated in an extremely short time. Furthermore, the provision of such auxiliary protrusions can further improve the design of the quick-drying sheet product.

[0015] In constructing the quick-drying sheet of the present invention, it is preferable that the height of the convex portions is within a range of 0.2 to 2 mm, and the height of the auxiliary projections is within a range of 0.1 to 1 mm. By having the convex portions and auxiliary protrusions of a predetermined height in this way, not only can the capillary phenomenon be utilized, but also the slopes and sides caused by the auxiliary protrusions can be used for drainage, and puddles and the like can be eliminated in an extremely short time, not only at room temperature but also at low temperatures. The height of the convex portion is the height based on the lowest position of the groove portion (the shortest straight-line distance from the reference position to the apex of the convex portion), and the height of the auxiliary protrusion is the height based on the surface position of the convex portion (the shortest straight-line distance from the reference position to the surface position of the convex portion).

[0016] In constructing the quick-drying sheet of the present invention, it is preferable that a cured coating film derived from a curable resin is formed entirely or partially on the surface of the flexible surface material. In this way, a cured coating film derived from a curable resin is formed on the surface of the flexible surface material, which provides a surface protection effect and allows the durability, mechanical properties, gloss, design, etc. of the quick-drying sheet to be adjusted appropriately within the desired range.

[0017] In forming the quick-drying sheet material of the present invention, it is preferable that the glossiness measured in accordance with JIS Z8741:1977 is in the range of 0.5 to 5. By limiting the glossiness of the surface of the quick-drying sheet material, usually the surface of the flexible surface material, to a predetermined range in this way, the design properties of the quick-drying sheet material can be improved.

[0018] In forming the quick-drying sheet material of the present invention, it is preferable that the surface roughness (Ra) measured in accordance with JIS B0601:1974 and JIS B0031:1994 is set to a value within the range of 5 to 20 μm. By limiting the surface roughness (Ra) of the quick-drying sheet material to a value within a predetermined range in this way, not only the quick-drying property but also the design property and the like can be quantitatively evaluated. [Brief explanation of the drawings]

[0019] [Figure 1] Figure 1(a) is a diagram for explaining the cross-sectional state when cut along line A1-A1 in the plan view shown in Figure 1(c), Figure 1(b) is a diagram for explaining the cross-sectional state when cut along line B1-B1 in the same plan view, and Figure 1(c) is a plan view showing the planar state of a quick-drying sheet material having convex portions on a flat surface. [Figure 2] Figure 2(a) is a diagram for explaining the cross-sectional state when cut along line A2-A2 in the plan view shown in Figure 2(c), Figure 2(b) is a diagram for explaining the cross-sectional state when cut along line B2-B2 in the same plan view, and Figure 2(c) is a plan view for explaining the planar state of a quick-drying sheet material having auxiliary protrusions on its surface. [Figure 3] Figure 3(a) is a plan view (photograph) showing the planar state of the quick-drying sheet material of Example 1, in which figures are arranged side by side to explain the cross-sectional state when cut along line A3-A3 and the cross-sectional state when cut along line B3-B3. Figure 3(b) is a plan view (photograph) showing the planar state of the quick-drying sheet material of Example 2, in which cross-sectional views are arranged side by side to explain the cross-sectional state when cut along line A4-A4. [Figure 4] FIG. 4(a) is a diagram illustrating the cross-sectional shape of a quick-drying sheet material having no intermediate layer, and FIG. 4(b) is a diagram illustrating the cross-sectional shape of a quick-drying sheet material having a surface protective layer. [Figure 5] Figure 5(a) is a diagram illustrating the relationship between the area percentage (%) of convex portions and quick-drying time (minutes) in a quick-drying sheet material, and Figure 5(b) is a diagram illustrating the relationship between the area percentage (%) of groove portions and quick-drying time (minutes) in a quick-drying sheet material. [Figure 6] FIG. 6 is a diagram illustrating the relationship between the area ratio (%) of the area 0.3 mm or less in height from a predetermined position and quick-drying properties (minutes) in a quick-drying sheet material. [Figure 7]Figure 7(a) is a diagram illustrating the relationship between the number of grooves in the MD direction (grooves / 100 mm) and quick-drying properties (minutes) in a quick-drying sheet material, and Figure 7(b) is a diagram illustrating the relationship between the number of grooves in the TD direction (grooves / 100 mm) and quick-drying properties (minutes) in a quick-drying sheet material. [Figure 8] 8(a) to 8(e) are conceptual diagrams showing the present invention and a conventional product side by side, respectively, for explaining the procedure for evaluating quick-drying properties and the changes in the state of puddles. [Figure 9] Figures 9(a) to (e) are diagrams (photographs) showing the present invention (corresponding to Example 1) and a conventional product (corresponding to Comparative Example 1) side by side to explain the quick-drying properties of each quick-drying sheet material. [Figure 10] 10(a) and 10(b) are diagrams illustrating the application state of the quick-drying sheet material of the present invention (corresponding to Example 1). DETAILED DESCRIPTION OF THE INVENTION

[0020] As illustrated in Figures 1(a) to 1(c) and 2(a) to 2(c), an embodiment of the present invention is a quick-drying sheet material 10 including at least a flexible substrate 16 and a flexible surface material 13 having 10 or more interconnected grooves 12c (horizontal grooves and vertical grooves) per unit length (100 mm), in which the widths (t3) of the horizontal and vertical grooves 12c are each within the range of 0.2 to 1.2 mm, and protrusions 12 are formed on the surface of the flexible surface material 13, and the area ratio (φ1) of the protrusions 12 per unit area (100%) is within the range of 70 to 90%.

[0021] 1.Flexible base material (1) Main ingredient 1 The flexible substrate 16 illustrated in Figures 1(a) to (c) and 2(a) to (c), etc., is the back side component of the quick-drying sheet material 10, and various resin materials are used as the main component constituting the flexible substrate depending on the intended use, such as at least one of vinyl chloride resin, acrylic resin, urethane resin, ester resin, amide resin, olefin resin, styrene resin, silicone resin, fluororesin, and rubber. Furthermore, if the quick-drying sheet is to be used as a flooring material or the like, it is more preferable to use at least one type of vinyl chloride resin, since this tends to provide excellent flexibility, durability, processability (embossing, etc.), cold resistance, slip resistance, colorability, etc. That is, in the case of vinyl chloride resin, by blending a predetermined proportion of plasticizer, it is possible to adjust the glass transition temperature and fluidity, thereby obtaining suitable flexibility, durability, processability, etc., and further, it is easy to color and is relatively inexpensive.

[0022] It is preferable to determine the average degree of polymerization of the vinyl chloride resin taking into consideration the processability, mechanical properties, handling properties, etc. of the quick-drying sheet material, but it is usually preferable to set the average degree of polymerization as specified in JIS K7367-2 to a value of 1200 or less. The reason for this is that vinyl chloride resins having such an average degree of polymerization have relatively good processability and tend to have suitable properties such as durability, mechanical properties, and flexibility. However, if the average degree of polymerization of the vinyl chloride resin is too low, the durability, mechanical properties, cushioning properties, etc. may be significantly reduced. Therefore, the average degree of polymerization of such vinyl chloride resin is preferably 300 or more, more preferably 600 or more, and even more preferably 800 or more.

[0023] Furthermore, even when vinyl chloride resin is used as the main component, it is also preferable to blend at least one other resin, such as low-molecular-weight vinyl chloride resin particles, cross-linked vinyl chloride resin, chlorinated polyethylene resin, polyethylene resin, or polyolefin resin, depending on the intended use. In this case, it is also preferable to blend other resins in an amount of usually 0.1 to 30 parts by weight per 100 parts by weight of the vinyl chloride resin.

[0024] (2) Main ingredient 2 It is also preferable to use recycled products of various resin materials as the base material constituting the flexible substrate. In particular, it is preferable to use at least one recycled vinyl chloride resin, since excellent flexibility, durability, processability, economy, etc. can be easily obtained.

[0025] (3) Plasticizer Furthermore, although it depends on the type of the base material constituting the flexible substrate, when vinyl chloride resin is used as the base material, it is preferable to blend at least one plasticizer in a predetermined amount. The reason for this is that by blending a plasticizer, it is possible to mix it uniformly with the vinyl chloride resin, and it is easy to obtain suitable properties such as processability, durability, flexibility, water repellency, and cushioning properties. Suitable plasticizers include phthalate ester plasticizers (bis(2-ethylhexyl) phthalate, hereinafter sometimes referred to as DOP), diisononyl phthalate, hereinafter sometimes referred to as DINP), di-n-hexyl phthalate, diallyl phthalate, dioctyl phthalate), fatty acid ester plasticizers (bis(2-ethylhexyl) adipate, bis(2-ethylhexyl) sebacate, etc.), phosphate ester plasticizers (tricresyl phosphate, triphenyl phosphate, cresylphenyl phosphate), polyester plasticizers (adipic acid polyester, phthalic acid polyester, etc.), sulfonate ester plasticizers, citrate ester plasticizers, trimellitate ester plasticizers, acrylic polymer plasticizers, etc., either alone or in combination of two or more. In particular, DOP and DINP are suitable plasticizers because they have good bleeding resistance and can easily provide good processability and plasticity even in relatively small amounts.

[0026] The amount of plasticizer to be added is preferably within a range of 30 to 100 parts by weight per 100 parts by weight of the main component (vinyl chloride resin, etc.). The reason for this is that if the amount of the plasticizer is 30 parts by weight or less, the flexibility of the resulting flexible substrate may be significantly insufficient. On the other hand, if the amount of the plasticizer exceeds 100 parts by weight, the heat resistance strength and durability may be significantly reduced, and bleeding of the plasticizer to the outside may become significantly increased. Therefore, the amount of plasticizer to be blended is more preferably within a range of 40 to 80 parts by weight, and even more preferably within a range of 50 to 70 parts by weight, per 100 parts by weight of the main agent.

[0027] (4) Coloring agent Although it depends on the type of base material constituting the flexible substrate, when vinyl chloride resin or the like is used as the base material, it is preferable to blend at least one coloring agent. The reason for this is that by blending a colorant, even a single color can be produced in a large number of color variations, and a hue suited to the intended use can be obtained. Furthermore, by appropriately blending a plurality of coloring agents, it is possible to express various complex patterns and colors such as mottled patterns, natural stone patterns, wood grain patterns, warm colors, and cool colors. Therefore, the amount of colorant to be added is preferably in the range of 0.01 to 10 parts by weight, more preferably in the range of 0.1 to 5 parts by weight, and even more preferably in the range of 0.5 to 3 parts by weight, relative to the main component of the flexible substrate (100 parts by weight).

[0028] (5) Other combination drugs 1 It is also preferable to compound at least one of stabilizers, extenders, viscosity adjusters, antioxidants, ultraviolet absorbers, coupling agents, foaming agents, etc., into the main component constituting the flexible substrate in an amount corresponding to the remainder of the main component and plasticizer relative to the total amount (100% by weight). The reason for this is that by blending a predetermined amount of these compounding agents into the main component, the stability, durability, weight reduction, foaming properties, etc. of the flexible substrate can be further improved. Therefore, although the amount of other compounding ingredients varies depending on the type, it is usually preferable to set it to a value within the range of 0.01 to 20 parts by weight relative to the main ingredient (100 parts by weight) of the flexible substrate, more preferably a value within the range of 0.1 to 10 parts by weight, and even more preferably a value within the range of 0.5 to 8 parts by weight.

[0029] (6) Other combination drugs 2 It is also preferable to blend a black conductive material such as carbon black with the base material constituting the flexible substrate. The reason for this is that by blackening the flexible substrate, it is possible to conceal some unevenness in dispersion when a considerable amount of recycled materials or the like is blended. Therefore, the amount of carbon black or the like to be added is preferably within a range of 0.01 to 5 parts by weight relative to the main component (100 parts by weight) of the flexible substrate, more preferably within a range of 0.05 to 5 parts by weight, and even more preferably within a range of 0.1 to 3 parts by weight.

[0030] (7) Thickness The thickness of the flexible substrate is preferably determined taking into consideration the application, ease of use, ease of production, walkability, durability, storage properties, etc. of the quick-drying sheet, but is usually preferably set to a value within the range of 300 to 2000 μm. The reason for this is that if the thickness of the flexible base material is 300 μm or less, the hiding power is insufficient, the color of the construction base may show through the flexible surface material, the mechanical strength and durability may be significantly reduced, and the fixation when laid on concrete, etc. may be reduced. On the other hand, if the thickness of the flexible substrate exceeds 2000 μm, it may become difficult to handle when laying it on concrete, etc., making it difficult to form a long roll, reducing its lightness, and further increasing the manufacturing time. Therefore, the thickness of the flexible substrate is more preferably set to a value within the range of 500 to 1500 μm, and even more preferably to a value within the range of 600 to 1200 μm.

[0031] (8) Embossing It is also preferable to emboss or texture the back surface of the flexible substrate. The reason for this is that the embossed pattern on the back surface of the flexible substrate makes it easier to handle and fix when laying it on concrete or the like. Moreover, even when a long quick-drying sheet is wound into a roll, excessive tightening can be prevented and a blocking effect can be exhibited.

[0032] 2.Flexible surface material (1) Main ingredient 1 The flexible surface material 12 illustrated in Figures 1(a) to (c) and 2(a) to (c), etc., is the surface side component of the quick-drying sheet material 10, and it is preferable that the main component constituting the flexible surface material is the same as that of the flexible substrate, which is the back side component, but it may also be a different material from the flexible substrate. Therefore, as in the flexible substrate, for example, at least one of vinyl chloride resin, acrylic resin, rubber, and the like can be used as the base material.

[0033] However, when used for sheet-like materials such as flooring materials, if the main agent of the flexible surface material is vinyl chloride resin, it is a suitable main agent because it is likely to provide excellent flexibility, durability, processability, slip resistance, colorability, water repellency, etc. Furthermore, when vinyl chloride resin is used as the main component in this way, it is generally preferable to set the average degree of polymerization as specified in JIS K7367-2 to a value of 1200 or less, taking into consideration processability, etc., as with flexible substrates. On the other hand, if the average degree of polymerization of such vinyl chloride resin is too low, durability and other properties may be significantly reduced. Therefore, in general, the lower limit of the average degree of polymerization of the vinyl chloride resin is preferably set to a value of 300 or more, more preferably to a value of 600 or more, and even more preferably to a value of 800 or more.

[0034] (2) Main ingredient 2 Furthermore, it is also preferable to use a mixture of multiple vinyl chloride resins (vinyl chloride resin particles) as the main component constituting the flexible surface material. The reason for this is that by preparing multiple vinyl chloride resins with different types of colorant blends (for example, white first vinyl chloride resin particles and black first vinyl chloride resin particles) and using a mixture of these, it is possible to create a quick-drying sheet product with a desired pattern and a wide range of designs.

[0035] When mixing at least two types of vinyl chloride resins (white first vinyl chloride resin particles and black second vinyl chloride resin particles) to improve design properties, etc., it is preferable to set the compounding ratio (by weight) of the first vinyl chloride resin particles to the second vinyl chloride resin particles within a predetermined range. That is, if the amount of the first vinyl chloride resin particles is X (parts by weight) and the amount of the second vinyl chloride resin particles is Y (parts by weight), it is preferable to determine the amount of Y to be less than 100 parts by weight, more preferably a value within the range of 10 to 90 parts by weight, and even more preferably a value within the range of 20 to 80 parts by weight, relative to 100 parts by weight of X. Needless to say, it is also suitable to mix three or more types of vinyl chloride resins (white first vinyl chloride resin particles, black second vinyl chloride resin particles, brown second' vinyl chloride resin particles, etc.) in a predetermined mixing ratio (mixing ratio of X / Y / Z=100 / 10 to 90 / 10 to 90 parts by weight) to further improve the design properties, etc. of the flexible surface material obtained therefrom.

[0036] (3) Plasticizer Although it depends on the type of main component that constitutes the flexible surface material, when vinyl chloride resin is used as the main component, it is preferable to blend a predetermined amount of at least one plasticizer, similar to that used in the flexible base material. The reason for this is that plasticizers such as DOP and DINP can be mixed uniformly with a specified vinyl chloride resin, etc., even in flexible surface materials, and have good bleeding resistance, and are likely to provide appropriate properties in terms of processability, durability, flexibility, water repellency, etc.

[0037] (4) Coloring agent Although it depends on the type of main agent constituting the flexible surface material, it is also preferable to blend a predetermined amount of at least one of various colorants into the flexible surface material, just like the flexible base material.

[0038] (5) Other combination drugs Depending on the type of main agent that constitutes the flexible surface material, it is also preferable to blend at least one of a stabilizer, extender, foaming agent, etc. with the flexible surface material as with the flexible base material, with the remainder being the remainder relative to the total amount (100% by weight).

[0039] (6) Thickness Furthermore, the thickness (t1+t4 and t2+t4) of the flexible surface material 12 exemplified in Figures 1(a) to 1(b), etc., is preferably determined taking into consideration ease of use, ease of manufacture, walkability, durability, storage, etc., and is usually preferably set to a value within the range of 300 to 2000 μm. The reason for this is that if the thickness of the flexible surface material is 300 μm or less, not only will the color of the flexible substrate appear on the flexible surface material, it will be difficult to accurately form convex and concave portions, but the mechanical strength and durability may also be significantly reduced. On the other hand, if the thickness of the flexible surface material exceeds 2000 μm, problems may arise such as difficulty in forming a long roll, reduced lightness, and excessive manufacturing time. Therefore, the thickness of the flexible substrate is more preferably set to a value within the range of 400 to 1600 μm, and even more preferably to a value within the range of 600 to 1200 μm.

[0040] (7) Emboss 1 Also, a pattern consisting of protrusions 12 is formed on the surface of the flexible surface material 13 exemplified in FIGS. 1(a) to 1(b) by embossing or the like. The reason for this is that even if a large amount of rainwater or the like is blown onto the surface of the flexible surface material of a quick-drying sheet from outside, the water is mainly introduced into the specified grooves, which are the gaps between adjacent convex parts, by using capillary action, and then discharged to the outside. In other words, rainwater introduced into a specific groove section passes through multiple interconnected groove sections and is guided to the outside, thereby contributing to the formation of puddles containing excessive water and their disappearance in a short period of time.

[0041] Therefore, as shown in Figure 1(a), it is preferable to set the height of the convex portion 12 (the length corresponding to the distance represented by symbol t1 in Figure 1(a)) to a value in the range of 0.2 to 2 mm, based on the lowest position of the groove portion 12c (see point P4 in the balloon diagram). The reason for this is that if the height (t1) of the convex portion is less than 0.2 mm, it may be difficult to form it with good precision by embossing. On the other hand, if the height of the convex portions is less than 2 mm, it becomes difficult to form them with high precision, and the quick-drying property (minutes) may decrease. Therefore, it is more preferable that the height of the convex portion is set to a value within the range of 0.3 to 1.5 mm, and even more preferable that the height is set to a value within the range of 0.4 to 1 mm. The height (t4) of the region below the convex portion shown in Figure 1(a) is not generally included in the height of the convex portion, but the height (t4) of the region below the convex portion is preferably set to a value within the range of 50 to 1000 μm, more preferably a value within the range of 100 to 800 μm, and even more preferably a value within the range of 200 to 600 μm, based on the lower surface of the flexible surface material.

[0042] Furthermore, it is preferable to determine the area ratio (φ1) of the convex portions per unit area (100%) on the surface of the flexible surface material taking into consideration the use of the quick-drying sheet, but it is characterized in that it is set to a value within the range of 70 to 90%. The reason for this is that if the area ratio of such convex portions is less than 70%, the area ratio of grooves becomes relatively large, which correspondingly reduces the availability of capillary action and may result in reduced quick-drying properties. On the other hand, if the area ratio of such convex portions exceeds 90%, the area ratio of grooves will decrease relatively, which will reduce the availability of capillary action and may result in a decrease in quick-drying properties. Therefore, it is more preferable that the area ratio of such convex portions is set to a value within the range of 71 to 89%, and even more preferable that it is set to a value within the range of 75 to 85%.

[0043] Here, referring to Figure 5(a), we will explain the relationship between the area ratio (%) of the convex parts per unit area (100%) in a quick-drying sheet material and the quick-drying property (minutes) corresponding to the time it takes for puddles to disappear, measured using a specified method. That is, the horizontal axis shows the area ratio (%) of the convex portion of a given height per unit area (100%), with the lowest position of the groove as the reference, and the vertical axis shows an index of quick-drying time (minutes) (see the measurement method in Example 1, etc.), and the data obtained based on Example 1, etc. are plotted. Judging from the characteristic curve A1 in FIG. 5(a), it can be seen that there is a correlation between the area ratio (%) of the convex portions and the quick-drying property (minutes) that indicates an optimum value. Therefore, in order to achieve a good quick-drying value, for example, within 240 minutes, it is effective to set the area ratio of the convex portions to a value within the range of 70 to 90%. Conversely, by controlling the area ratio of the convex portions of a predetermined height within a predetermined range with respect to the lowest position of the grooves in the quick-drying sheet material, a good quick-drying value can be obtained.

[0044] In FIG. 5(a), characteristic curve B1 corresponds to a case where the width of the groove portion is considerably large, at 2 mm or more, or the groove is not continuous, and as a result, good quick-drying properties are not obtained (corresponding to comparative examples 6 to 8). That is, even if the area ratio of the convex portions of a predetermined height is within the range of 70 to 90% as defined in the present invention, it takes a considerably long time of 1600 minutes or more to dry quickly.

[0045] (8) Emboss 2 As shown in Figures 1(a) to (c), 2(a) to (c), 3(a) to (b), and 4(a) to (b), respectively, the quick-drying sheet material 10 is characterized in that grooves 12c (vertical grooves and horizontal grooves) of a predetermined width and a predetermined number are formed on the surface of each of the protrusions 12. The reason for this is that by having such grooves, even if a large amount of rainwater or the like is blown into the quick-drying sheet from outside, the specified vertical and horizontal grooves formed on the surface side will effectively absorb the rainwater, mainly by utilizing capillary action. Therefore, the absorbed water can be actively discharged to the outside through the grooves, which can eliminate puddles in a short time or even prevent the formation of puddles.

[0046] 7(a) and 7(b), it is preferable that the maximum number of transverse grooves crossed by a virtual line along the MD (hereinafter sometimes referred to as the number of grooves in the MD) and the maximum number of longitudinal grooves crossed by a virtual line along the TD (hereinafter sometimes referred to as the number of grooves in the TD) per unit length (100 mm) are each 10 or more. Note that, regarding the number of grooves, a groove with a width of 0.5 mm or more and a depth of 0.2 mm or more is usually counted as one groove, and the maximum number is measured. The reason for this is that by controlling the number of vertical and horizontal grooves within a predetermined range in this way, even if a large amount of rainwater or the like is blown onto the surface of the flexible surface material from outside, rainwater can be effectively absorbed mainly by utilizing capillary action. Therefore, the absorbed rainwater or the like can be discharged to the outside, and the formation of puddles containing excessive water can be prevented. More specifically, if the number of longitudinal grooves and transverse grooves is less than 10, it may become difficult to absorb rainwater by utilizing capillary action. However, if the number of such longitudinal grooves and transverse grooves is excessively large, it becomes difficult to form them with precision, and it may become difficult to absorb rainwater stably. Therefore, the number of longitudinal grooves and transverse grooves per unit length (100 mm) is more preferably within the range of 11 to 50, and even more preferably within the range of 12 to 30. Here, it is also preferable that the grooves include oblique grooves in addition to the longitudinal grooves and lateral grooves. In this case, if the angle between a virtual line running along the MD direction and a groove is between 45° and less than 135° counterclockwise, it is counted as the number of grooves in the MD direction, and if the angle between a virtual line running along the TD direction and a groove is between 0° and less than 45°, or between 135° and less than 180° counterclockwise, it is counted as the number of grooves in the TD direction.

[0047] Also, the width (t3) of the vertical grooves and horizontal grooves that make up the groove portion 12c, as exemplified in Figures 1(a) to (c), 2(a) to (c), etc., is characterized in that it is set to a value within the range of 0.2 to 1.2 mm. The reason for this is that by controlling the width of the vertical and horizontal grooves to values ​​within a specified range, even if a large amount of rainwater or the like is blown onto the surface of the flexible surface material from outside, capillary action can be effectively utilized to effectively absorb and discharge the rainwater or the like. More specifically, if the width of the longitudinal grooves and lateral grooves is less than 0.2 mm, it becomes difficult to form them with precision, which may make it difficult to absorb rainwater stably. On the other hand, if the width of each of the longitudinal and transverse grooves is 1.2 mm or more, it may become difficult to utilize the capillary phenomenon itself, making it difficult to absorb rainwater and the like. Therefore, it is more preferable that the width of such longitudinal grooves and transverse grooves per unit length (100 mm) is within the range of 0.3 to 1 mm, and even more preferably within the range of 0.4 to 0.8 mm. Needless to say, the widths of the longitudinal grooves and transverse grooves may be the same or different as long as they are within these ranges.

[0048] Here, referring to Figure 5(b), we will explain the relationship between the area percentage (%) of a specified groove portion per unit area in a quick-drying sheet and the quick-drying property (minutes) corresponding to the time it takes for a puddle to disappear, measured using a specified method. That is, the horizontal axis shows the area percentage (%) of grooves having a specified height per unit area (100%) from the lowest position of the grooves, and the vertical axis shows an index of quick-drying time (minutes) (see the measurement method in Example 1, etc.), and the data obtained based on Example 1, etc. are plotted. Judging from the characteristic curve A2 in FIG. 5(b), it can be seen that there is a correlation between the area ratio (%) of the groove portion and the quick-drying property (minutes) that shows an optimal value. Therefore, in order to achieve good quick drying, for example, to achieve a value of 240 minutes or less for the time it takes for puddles to disappear, it is effective to set the area ratio of the grooves to a value within the range of 10 to 30%. Conversely, by controlling the area ratio of the grooves at a predetermined height within a predetermined range based on the lowest position of the grooves in the quick-drying sheet, a good quick-drying value can be obtained. Therefore, it is more preferable that the area ratio of such grooves per unit length area (100%) is within the range of 11 to 29%, and even more preferably within the range of 12 to 25%.

[0049] In addition, in Figure 5(b), characteristic curve B2 is a characteristic curve corresponding to the case where the width of the groove portion is considerably large, such as 2 mm or more, or the groove is not continuous, and as a result, good quick-drying properties are not obtained (corresponding to comparative examples 6 to 8). That is, even if the area ratio of the grooves is within the range of 10 to 30% as specified in the present invention, it takes a considerably long time of 1600 minutes or more to dry quickly.

[0050] The predetermined reference position (the lowest position of the groove) can be identified by measuring the distance to the top of the groove from a cross-sectional photograph of the quick-drying sheet material. Furthermore, when convex portions of different heights are adjacent to each other and the predetermined reference position is located in the gap between them, it is preferable to employ the following measurement method. That is, as shown in FIG. 1(a), a diagonal line (P1 and P2) is assumed to run along the gap between adjacent convex portions of different heights, and a perpendicular line is drawn vertically from the center (P3) of the line to the lowest position (P4) of the groove, which can be determined as the height of the groove.

[0051] Here, with reference to FIG. 6, the relationship between the area ratio (φ1) of the area 0.3 mm or more above a predetermined position in the quick-drying sheet material and quick-drying properties will be described. That is, it can be seen from the characteristic curve A3 shown in FIG. 6 that there is a linear correlation between the area ratio (%) of the region at a predetermined height and the quick-drying property (minutes). Therefore, in order to achieve a good drying speed, for example, within 240 minutes, it is effective to set the area ratio of the region at a predetermined height to 10 to 40% or less. Conversely, by controlling the area ratio of the region at a predetermined height within a predetermined range based on the lowest position of the grooves in the quick-drying sheet material, a good quick-drying value can be obtained. Therefore, it is more preferable that the area ratio of the region of the predetermined height per unit length area (100%) is within the range of 11 to 29%, and even more preferable that it is within the range of 12 to 25%.

[0052] In Figure 6, characteristic curve B3 corresponds to the case where the width of the groove portion is considerably large, at 2 mm or more, or the groove is not continuous, and as a result, good quick-drying properties are not obtained (corresponding to comparative examples 6 to 8). In other words, even if the area ratio of the region 0.3 mm or more in height from the specified position, as specified in the present invention, is within the range of, for example, 10 to 40%, it takes a considerably long time, more than 1600 minutes, to dry quickly.

[0053] 3. Middle layer (reinforced fiber layer) Furthermore, as shown in Figure 1(a), when constructing the quick-drying sheet material 10, it is preferable to provide an intermediate layer (sometimes referred to as a reinforcing fiber layer) 14 between the flexible substrate 16 and the flexible surface material 13. The reason for this is that by providing an intermediate layer such as a reinforcing fiber layer in a predetermined location, the dimensional stability and heat resistance (adjustment of thermal shrinkage rate) of the quick-drying sheet, as well as the mechanical properties (adjustment of tear strength), can be adjusted to the desired range, thereby enabling the sheet to exhibit stable quick-drying properties over a long period of time. However, as shown in FIG. 4(a), when constructing the quick-drying sheet material 10, the intermediate layer between the flexible substrate 16 and the flexible surface material 13 can be omitted depending on the application.

[0054] Here, the intermediate layer is not particularly limited as long as it is a material that can exert a reinforcing effect, but typically includes at least one of glass fiber (including woven fabrics and nonwoven fabrics such as glass fiber mats), polyester fiber (including woven fabrics and nonwoven fabrics such as polyester fiber mats), olefin fiber mats (including woven fabrics and nonwoven fabrics such as olefin fiber mats), polyamide fiber mats (including woven fabrics and nonwoven fabrics such as polyamide fiber mats), etc. In particular, a glass fiber mat is a suitable intermediate layer because it can exert a significant reinforcing effect even at a certain thinness and does not impair the flexibility or handling of the quick-drying sheet material.

[0055] When the intermediate layer is made of fiber (woven or nonwoven fabric), it is usually preferable that the thickness be set to a value within the range of 50 to 400 μm. The reason for this is that if the thickness of the intermediate layer is less than 50 μm, not only will it be difficult to exert reinforcement, but it will also be difficult to handle, which may make it difficult to stably produce a quick-drying sheet product. On the other hand, if the thickness of the fibrous intermediate layer exceeds 400 μm, problems may arise, such as difficulty in forming a long roll of the quick-drying sheet material, reduced lightness, and excessive manufacturing time. Therefore, when the intermediate layer is fibrous, the thickness is more preferably set to a value within the range of 80 to 300 μm, and even more preferably to a value within the range of 100 to 250 μm.

[0056] 4.Auxiliary protrusion (1) Shape As shown in Figures 2(a) to (c), it is preferable to provide auxiliary protrusions 12d on at least one surface of the convex portions 12 (the high convex portions which are the first rectangular patterns 12a and the low convex portions which are the first rectangular patterns 12b) on the flexible surface material 13. Here, the shape of such auxiliary projections is not particularly limited, but usually, a line shape or a circle shape (including an oval shape) is preferable. The reason for this is that a linear or circular shape can control the direction of drainage even on slopes and sides caused by auxiliary protrusions without excessively obstructing the flow of drainage, thereby contributing to promoting drainage. Therefore, by forming such auxiliary projections, puddles and the like can be eliminated in an extremely short time not only at room temperature but also at low temperatures.

[0057] Furthermore, as shown in FIG. 3(a), the auxiliary protrusions create subtle shadows on the surface including the convex portions, further improving the design of the quick-drying sheet. Incidentally, in the right-hand plan view shown in Figure 3(a), the shaded area is a so-called matte area in which not only linear auxiliary protrusions but also circular auxiliary protrusions are provided, and corresponds to an area with a relatively large surface roughness (Ra) and a relatively low glossiness. On the other hand, the non-shaded area is a gloss area where neither linear nor circular auxiliary protrusions are provided, and corresponds to an area where the surface roughness (Ra) is relatively small and the glossiness is relatively high. As shown in Figures 10(a) to (b), from an overall visual perspective, the gloss areas are formed in a cross or U-shape within these matte areas, which gives the gloss areas a three-dimensional appearance and significantly enhances the design of the quick-drying sheet material.

[0058] (2) Form Furthermore, the height (t1'-t1, t2'-t2) of the auxiliary protrusion 12d shown in Figures 2(a) to 2(b), etc. is not particularly limited, but is usually defined as the height (straight-line distance) from the surface of the convex portion, which is the reference position, and is usually preferably set to a value within the range of 0.1 to 1 mm. The reason for this is that auxiliary protrusions of this height can control the direction of drainage from puddles, etc., even on slopes and sides caused by the auxiliary protrusions, without excessively obstructing the flow of drainage, thereby contributing to promoting drainage. Furthermore, by providing auxiliary protrusions of such height, the design of the quick-drying sheet product can be further improved. Therefore, it is more preferable that the height of the auxiliary projections be set to a value within the range of 0.2 to 0.8 mm, and even more preferable that the height be set to a value within the range of 0.3 to 0.5 mm.

[0059] Furthermore, when the auxiliary projection is linear, it is preferable that the width thereof is within the range of 0.5 to 3 mm. The reason for this is that if the width of the linear auxiliary projections is excessively small, such as less than 0.5 mm, the amount of wastewater that can be treated may decrease significantly, or it may become difficult to control the flow of wastewater. On the other hand, if the width of the linear auxiliary protrusions exceeds 3 mm, the required area per unit area may be affected, but conversely, it may become difficult to control the flow of wastewater. Therefore, when the auxiliary projection is linear, it is more preferable that the width be within the range of 0.8 to 2.7 mm, and even more preferable that the width be within the range of 1.0 to 2.5 mm. When the auxiliary projection is linear, its length is preferably determined taking into consideration the size of the rectangular pattern forming the auxiliary projection, etc., but it is usually preferable to set the length to the same length (100%) as the length (100%) of the rectangular pattern along the direction in which the auxiliary projection is formed. Alternatively, even if the auxiliary projection is linear, if a discontinuous portion is provided, it is preferable that the length be 50 to 90% of the length (100%) of the rectangular pattern.

[0060] Furthermore, when the auxiliary projection is circular, it is preferable that the circle equivalent diameter is within the range of 0.05 to 1 mm. The reason for this is that if the circular equivalent diameter of the circular auxiliary protrusions is excessively small, such as less than 0.05 mm, it may become more susceptible to clogging with dirt, the amount of wastewater that can be treated may decrease significantly, and it may become difficult to control the flow of wastewater. On the other hand, if the circular auxiliary projections have an equivalent circle diameter of more than 1 mm, this may be affected by the number per unit area, but conversely, it may become difficult to control the flow of wastewater. Therefore, when the auxiliary projection has a circle-equivalent diameter, it is more preferable that the circle-equivalent diameter is within the range of 0.08 to 0.8 mm, and it is even more preferable that the width is within the range of 0.1 to 0.4 mm.

[0061] Furthermore, when the auxiliary projections are in the form of a plurality of lines, they are preferably arranged in parallel, and the interval between adjacent linear auxiliary projections is preferably set to a value within the range of 0.2 to 4 mm. The reason for this is that if the spacing between adjacent linear auxiliary projections is excessively small, such as less than 0.2 mm, the amount of wastewater that can be treated may decrease significantly, or it may become difficult to control the flow of wastewater. On the other hand, if the distance between adjacent linear auxiliary projections exceeds 4 mm, it may become difficult to control the flow of drainage water. Therefore, the interval between adjacent linear auxiliary projections is more preferably within the range of 1 to 3.5 mm, and even more preferably within the range of 1.5 to 3 mm.

[0062] Furthermore, even when parallel-arranged auxiliary protrusions 12d are formed on a plurality of rectangular patterns including convex portions 12 defined by horizontal grooves and vertical grooves as shown in Figures 2(a) to (b), it is preferable that all of the auxiliary protrusions 12d are arranged facing substantially in the same direction. The reason for this is that if auxiliary protrusions are arranged facing the same direction in multiple rectangular patterns, the direction of drainage from puddles, etc. can be better controlled even on slopes and sides caused by such auxiliary protrusions, and this can further contribute to the quick drying caused by the promoted drainage.

[0063] 5.Surface protection layer As shown in FIG. 4(b), it is preferable to provide a surface protection layer 18 on the entire or part of the outermost surface of the quick-drying sheet material 10, including the convex portions 12 and the groove portions 12c. The reason for this is that by providing such a surface protective layer, even partially, on the outermost surface of the quick-drying sheet material, it is possible to exert a surface protective effect, and the durability, mechanical properties, gloss, design, etc. of the quick-drying sheet material can be appropriately adjusted to the desired range over a long period of time.

[0064] In particular, it is preferable that the surface protective layer be a cured coating film derived from a curable resin formed entirely or partially on the surface of the flexible surface material. The reason for this is that a cured coating film derived from a curable resin can be formed in an extremely short time by providing a coating step and a curing step. Furthermore, even if the cured coating film derived from the curable resin is thin, it can significantly improve the durability, mechanical properties, gloss, design properties, etc. of the quick-drying sheet material.

[0065] In addition, it is generally preferable that the thickness of the surface protective layer (including the cured film) is set to a value within the range of 5 to 100 μm. The reason for this is that if the thickness of such a surface protective layer is 5 μm or less, not only will it be difficult to exert reinforcement, but it may also be difficult to form it stably. On the other hand, if the thickness of the surface protective layer exceeds 100 μm, problems may arise such as difficulty in forming a long roll of the quick-drying sheet material and excessive manufacturing time. Therefore, the thickness of the surface protection layer is more preferably set to a value within the range of 3 to 150 μm, and even more preferably to a value within the range of 5 to 75 μm.

[0066] 6.Various characteristics (1) Glossiness It is also preferable that the glossiness of the quick-drying sheet material (which can be measured in accordance with JIS Z8741:1977) is set to a value within the range of 0.5 to 5. The reason for this is that by limiting the glossiness of the surface of the quick-drying sheet material, usually the surface of the flexible surface material, to a predetermined range, the design properties of the quick-drying sheet material can be improved. More specifically, if the glossiness of the surface of such a quick-drying sheet material is less than 0.5, the design and the like may be significantly reduced. On the other hand, if the gloss level of the quick-drying sheet exceeds 5, the slip resistance and quick-drying properties may decrease. Therefore, it is more preferable that the glossiness of the surface of such a quick-drying sheet material is set to a value within the range of 1 to 4, and even more preferably within the range of 1.5 to 3.

[0067] (2) Surface roughness (Ra) Furthermore, the surface roughness (Ra) of the quick-drying sheet (measurable in accordance with JIS B 0601:1974 and JIS B 0031:1994) is preferably set to a value within the range of 5 to 20 μm. The reason for this is that by limiting the surface roughness (Ra) of the quick-drying sheet material to a value within a predetermined range, not only the quick-drying property but also the design property and the like can be quantitatively evaluated. More specifically, if the surface roughness (Ra) of such a quick-drying sheet is less than 5 μm, the quick-drying properties and anti-slip properties may be reduced, and further, the design properties may be significantly reduced. On the other hand, if the surface roughness (Ra) of such a quick-drying sheet exceeds 20 μm, it becomes difficult to form the sheet stably, and the quick-drying property may vary greatly. Therefore, the surface roughness (Ra) of such a quick-drying sheet is more preferably set to a value within the range of 10 to 18 μm, and even more preferably to a value within the range of 12 to 17 μm.

[0068] (3) Rectangular pattern Furthermore, as shown in Figure 1(c), when constructing the quick-drying sheet material 10, it is preferable to have a first rectangular pattern 12a of at least 0.6 cm x 0.6 cm or less in size and a second rectangular pattern 12b of at least 0.8 cm x 0.8 cm in size, as rectangular patterns defined by groove portions 12c (horizontal grooves and vertical grooves). The reason for this is that by forming multiple rectangular patterns (sometimes referred to as relatively high convex portions and relatively low convex portions) with different areas in this manner, capillary action can be more effectively utilized regardless of the size of a given puddle, etc. Therefore, by providing a plurality of rectangular patterns with different sizes and areas, puddles caused by rainwater or the like can be eliminated in an extremely short time even at relatively low temperatures.

[0069] As shown in FIG. 1(a), it is also preferable to change the height of the convex portion (t1) depending on the area of ​​the adjacent rectangular patterns (relatively high convex portion and relatively low convex portion). That is, it is preferable that the height of the convex portions in the first rectangular pattern having a size of at least 0.6 cm×0.6 cm or less is made higher than the height of the convex portions in the second rectangular pattern having a size of 0.8 cm×0.8 cm or more. The reason for this is that by forming multiple rectangular patterns with protrusions of different heights, it is possible to make more effective use of capillary action regardless of the size of a given puddle, etc., and it may also be possible to improve the design, etc. Therefore, for the convex portions with different heights, it is preferable that the heights vary within a range of 0.1 mm to 3 mm, more preferably within a range of 0.2 mm to 2 mm, and even more preferably within a range of 0.3 mm to 1.5 mm. On the other hand, as shown in FIG. 1(b), it is also preferable that the heights of the convex portions (t1) in adjacent rectangular patterns are not changed but are made substantially the same. That is, depending on the application, it may be preferable to arrange only first rectangular patterns, each having the same height of the protrusions and a size of at least 0.6 cm or less x 0.6 cm or less, evenly spaced vertically and horizontally so that the surface positions of each pattern coincide and the overall appearance is flat.

[0070] (4) Adhesive layer Although not shown, it is also preferable to provide an adhesive layer on the back side of the flexible substrate 16 of the quick-drying sheet material 10 as shown in FIG. 1(a) and other figures. The reason for this is that by providing such an adhesive layer, the fastening of the quick-drying sheet to the substrate (mortar, etc.) is improved, and the usability is greatly improved.

[0071] 7.Characteristics (1) Quick drying As will be described later in Example 1, etc., in order to demonstrate quantitativeness in relation to the quick-drying properties shown in Figures 5(a)-(b) and Figure 6, in the present invention (corresponding to Example 1), etc., a puddle is formed in a predetermined manner, and the product is left under predetermined environmental conditions (measurement conditions: 5°C, 70% RH), and the time until the puddle disappears is measured, thereby making a judgment, as shown in Figures 8(a)-(e). Furthermore, for reference, Figures 9(a) to (e) show photographs comparing the formation and disappearance of puddles in the present invention (corresponding to Example 1) and the prior art (corresponding to Comparative Example 1). It should be noted that what is reflected in the puddles in the photographs of Figures 9(a) to (e) is a light positioned above. If the time taken for the puddles to disappear is within 120 minutes, it can be said that the surface exhibits excellent quick-drying properties. Similarly, if the time it takes for the puddles to disappear is within 240 minutes, it can be said that the material has good quick-drying properties, if it is within 480 minutes, it can be said that the material has practical quick-drying properties, and if it exceeds 480 minutes, it cannot be said that the material has practical quick-drying properties. It has been found that the time it takes for the puddles to disappear can be further reduced by changing the measurement temperature from low temperature (5°C) to room temperature (25°C).

[0072] (2) Sweeping ability As will be described later in Example 1, etc., the sweeping ability of quick-drying sheet materials can be evaluated. That is, one 200mm x 200mm test piece is taken, 4g of the specified soiling material (granular sand of 2.3mm or less in particle size) is evenly spread on the test piece, and then the test piece is swept five times in the MD direction and five times in the TD direction with a broom. Next, the soiling material remaining on the surface is thoroughly collected with a brush, and the weight of the collected residual soiling material is measured and the removal rate is calculated in relation to the initial weight (4g). Furthermore, if the weight ratio of the amount of sand swept after cleaning under specified conditions to the initial weight is 99% or more, it can be said that the sweeping ability is excellent. Similarly, if the amount of sand swept from the cleaning area is 98% or more, it can be said to have good sweeping performance, and similarly, if it is 95% or more, it can be said to have practical sweeping performance, and if it is less than 95%, it can be said to not have practical sweeping performance.

[0073] (3) Anti-slip property 1: OY-PULL method As will be described later in Example 1, etc., OY-PULL evaluation is carried out based on JIS A 1454, and the slip resistance of the quick-drying sheet material can be evaluated. That is, using a sliding tester, a sliding piece is applied with a constant load (784 N), a slope is formed at an angle of 18°, and the static friction coefficient is measured when the piece is pulled along the slope with a force of 784 N / s, and the static friction coefficient can be evaluated according to a predetermined standard. Also, the sample surface is coated with 400 g / m of a mixture of tap water and test powders 1, type 1 and type 7, specified in JIS Z 8901, in a weight ratio (synonymous with mass ratio) of 20:9:1. 2 The test is carried out based on the OY-Pull method with the sprayed solution at the rate of 100%. If the static friction coefficient based on the OY-PULL method is 0.75 or more, it can be said that the material has excellent anti-slip properties. Similarly, if the static friction coefficient based on the OY-PULL method is 0.7 or more, it can be said to have good slip resistance, if it is 0.5 or more, it can be said to have practical slip resistance, and if it is less than 0.5, it can be said to have no practical slip resistance.

[0074] (4) Anti-slip 2: Walkability As will be described later in Example 1, etc., the slip resistance of the quick-drying sheet material can be evaluated based on the walking properties. That is, test subjects (for example, 10 people) walk normally on the quick-drying sheet material while wearing men's shoes with hard soles, and the results are converted into evaluation scores based on a predetermined seven-level evaluation standard, and the average value is calculated to evaluate the anti-slip properties related to walking comfort. If the test subjects' average score is 5 or more, it can be said that the product has excellent anti-slip properties based on walkability. Similarly, if the average score is 4 points or more, it can be said that the slip resistance is good based on the walking comfort, if the average score is 3 points or more, it can be said that the slip resistance is good based on the walking comfort but does not pose any problems in practical use, and if the average score is less than 3 points, it can be said that the slip resistance is so poor that it causes problems in practical use.

[0075] (5)Flexibility In order to ensure good handling and processability, it is preferable that the quick-drying sheet material has a certain level of flexibility compared to quick-drying materials such as FRP and ceramic (quick-drying tiles, etc.). In other words, if a three-point bending test (JIS K7171:2016 Plastics - Determination of bending properties) is conducted on a long quick-drying sheet and the maximum point test force is measured, and the value is 12N or less, it can be said to have excellent flexibility.Similarly, if the maximum point test force of a long quick-drying sheet is 16N or less, it can be said to have good flexibility, and if it is 20N or less, it can be said to have flexibility that is not a problem for practical use, and if it exceeds 20N, it can be said to have flexibility that causes problems for practical use. Furthermore, since the quick-drying sheet has predetermined grooves, these act as hinges, increasing flexibility and making the quick-drying sheet easier to wind up.

[0076] 8. Manufacturing method The method for producing the quick-drying sheet is not particularly limited, and it can be produced by a known molding method. Therefore, it can be produced by at least one molding method such as extrusion molding, injection molding, powder molding, and calender molding. When the quick-drying sheet is long, an extrusion molding machine may be used to heat and melt the vinyl chloride resin mixture and continuously extrude it into a sheet. Furthermore, a vinyl chloride resin mixture can be heated and melted using an injection molding machine, and while maintaining flexibility, a quick-drying sheet material can be injection molded using a shaping mold to create a desired surface pattern.

[0077] Furthermore, in the production of quick-drying sheets, a powder molding method can be adopted in which a vinyl chloride resin mixture is heated to gel, and then pressed in a mold to continuously mold it into a sheet. Alternatively, a quick-drying sheet comprising a flexible substrate and a flexible surface material having convex portions of a predetermined area ratio and groove portions of a predetermined width can be precisely formed by forming a long sheet into a film by a calendar molding method and then pressurizing and shaping it in a predetermined mold.

[0078] Furthermore, in the production of quick-drying sheets, it is also preferable to provide a predetermined coating layer or surface-modifying layer on the surface as a post-processing step to improve the scratch resistance, stain resistance, and hydrophilicity of the surface. More specifically, it is preferable to emboss the surface layer, then laminate a curable resin or the like, and further cure the curable resin to form a laminate having a surface cured film, which is then wound into a roll to form a quick-drying sheet. [Example]

[0079] The present invention will be described in detail below based on examples. However, the scope of the rights of the present invention shall not be narrowed by the description of the examples without any particular reason.

[0080] [Example 1] 1. Creating quick-drying sheets (1) Preparation of raw materials 1 (flexible surface material, etc.) for quick-drying sheets As raw materials for flexible surface materials, a first vinyl chloride resin composition and a second vinyl chloride resin composition having the following formulation were prepared. Then, the first vinyl chloride resin composition and the second vinyl chloride resin composition for vinyl chloride resin composition substrates were pulverized into particles, and then mixed in a predetermined ratio to obtain a powder raw material for flexible surface materials. In addition, a long glass fiber mat was also prepared as an intermediate layer (reinforced fiber layer).

[0081] (First vinyl chloride resin composition) *Vinyl chloride resin (average degree of polymerization: 1000) 100 parts by weight *Plasticizer (DOP) 52 parts by weight *Stabilizer (Ba-Zn compound) 6 parts by weight *Colorant (carbon black) 1 part by weight *Bulking agent (calcium carbonate) 30 parts by weight

[0082] (Second vinyl chloride resin composition) *Vinyl chloride resin (average degree of polymerization: 1000) 100 parts by weight *Plasticizer (DOP) 52 parts by weight *Stabilizer (Ba-Zn compound) 6 parts by weight *Colorant (iron oxide) 2 parts by weight *Bulking agent (calcium carbonate) 30 parts by weight

[0083] (2) Preparation of raw material 2 (flexible substrate) for quick-drying sheets A vinyl chloride resin composition for substrates (hereinafter sometimes referred to as a third vinyl chloride resin composition) having the following formulation was prepared. That is, the third vinyl chloride resin composition was pulverized to form powder.

[0084] (Third vinyl chloride resin composition) *Vinyl chloride resin (average degree of polymerization: 1000) 100 parts by weight *Plasticizer (DOP) 52 parts by weight *Stabilizer (Ba-Zn compound) 3 parts by weight *Colorant (carbon black) 2 parts by weight *Bulking agent (calcium carbonate) 100 parts by weight *Foaming agent 3 parts by weight

[0085] (3) Creation of quick-drying sheets 1 A roll of quick-drying sheet material (50 m long, 1800 mm wide) was prepared. That is, using a powder molding method, a flexible substrate made of powder particles derived from a vinyl chloride resin composition for substrates, a flexible surface material made of powder particles derived from multiple vinyl chloride resin compositions for substrates, and a roll of quick-drying sheet material were produced by heating, molding (molding temperature: 30 to 50°C), and using a pressure roll (pressure: 200 to 300 MPa) through an intermediate layer. As a result, as shown in Figures 2(a) to (c), the height of the convex portion was 0.5 mm, the area ratio of the convex portion (φ1) was 89.6%, the area ratio of the groove portion (φ1') was 10.4%, and the area ratio of the region with a height of 0.3 mm or less (φ2) was 28.6%. Furthermore, a quick-drying sheet was obtained having a flexible surface layer with interconnected grooves, with the number of grooves in the MD direction being 17 / 100 mm and the number of grooves in the TD direction being 17 / 100 mm. Furthermore, as shown in Figures 2(a) to (c), it was confirmed that linear auxiliary protrusions (width: 2 mm, height: 0.4 mm, length: 6 mm, average spacing: 2 mm) were formed.

[0086] (4) Creation of quick-drying sheets 2 Next, a curable resin was applied to a thickness of 10 to 20 μm onto the surface of the laminate whose surface layer had been embossed. Next, the curable resin was cured to form a laminate having a surface-cured film, which was then wound into a roll.

[0087] 2. Evaluation of quick-drying sheets (1) Evaluation 1 (number of grooves, groove width, and area ratio of convex parts) It was examined whether the flexible surface material of the quick-drying sheet material satisfies the following conditions 1 to 3. Condition 1: The groove has a predetermined number (10 or more) of lateral grooves and longitudinal grooves that communicate with each other. Condition 2: The width of the lateral grooves and longitudinal grooves is within a predetermined range (0.2 to 1.2 mm). Condition 3: The area ratio of the convex portions is within a predetermined range (70 to 90%).

[0088] ⊚: All conditions 1 to 3 are satisfied, and the variation in the obtained values ​​is small, 10% or less of the average value. ○: All conditions 1 to 3 are satisfied, but the variation in the obtained values ​​is large, exceeding 10% of the average value. △: None of the conditions 1 to 3 are satisfied. ×: None of the conditions 1 to 3 are satisfied.

[0089] (2) Rating 2 (quick drying) As shown in Figure 8(a), a sheet-like object (2 mm thick, 35 cm wide, and 35 cm long) with a cylindrical hole (20 cm diameter and 2 mm high) in the center was prepared in a room maintained at an ambient temperature of 5°C and a relative humidity of 70%RH. Next, the sheet-like material was adhered and fixed onto mortar concrete using a double-sided adhesive sheet, with a 5 mm thick vinyl chloride resin plate interposed therebetween. Next, the quick-drying sheet was placed on the sheet with the substrate surface facing downwards and adhered and fixed using a double-sided adhesive sheet. At this time, it was confirmed that a slight depression resembling a cone was formed near the center of the quick-drying sheet, as shown in Figure 8(b). Next, as shown in Figure 8(c), tap water was sprayed evenly from the surface material side of the quick-drying sheet using a watering can at a rate of 500 ml / 5 seconds, and it was confirmed that a specified puddle was formed along the depression. Next, as shown in Figures 8(d) to (e), the state of the puddles was visually observed, the time from when the puddles formed until they disappeared was measured, and quick-drying properties were evaluated according to the following criteria.

[0090] ◎: It was confirmed that the puddle disappeared within 120 minutes. ○: It was confirmed that the puddle disappeared within 240 minutes. △: It was confirmed that the puddle disappeared within 480 minutes. ×: Puddles were confirmed to exist even after 480 minutes had passed.

[0091] (3) Rating 3 (Sweeping ability) A 200mm x 200mm test piece was taken, and 4g of the specified soiling material (granular sand with a particle size of 2.3mm or less) was evenly scattered on the test piece. The test piece was then swept five times in the MD direction and five times in the TD direction with a broom. The soiling material remaining on the surface was collected with a brush, and the weight of the collected residual soiling material was measured to calculate the removal rate. The sweepability was then evaluated according to the following criteria.

[0092] ◎: Sand sweeping efficiency is 99% or more. ○: Sand sweeping efficiency is 98% or more. △: Sand sweeping ability is 90% or more. ×: Sand sweeping ability is less than 90%.

[0093] (4) Rating 4 (Slip resistance 1 / OY-PULL rating) Based on JIS A1454, OY-PULL evaluation was carried out to evaluate the slip resistance of the quick-drying sheet material. That is, using a sliding tester, a sliding piece was applied with a constant load (784 N), a slope was formed at an angle of 18°, and the static friction coefficient was measured when the piece was pulled along the slope with a force of 784 N / s, and evaluated according to the following criteria.

[0094] ◎: The static friction coefficient is 0.75 or more. Good: The static friction coefficient is 0.7 or more. △: The static friction coefficient is 0.5 or more. ×: The static friction coefficient is less than 0.5.

[0095] (5) Rating 5 (Slip resistance 2 / Walking comfort rating) The slip resistance of the quick-drying sheet material was evaluated by the following sensitive walking test. That is, test subjects (10 people) walked normally on the quick-drying sheet material, and the results were converted into evaluation scores based on the seven-level evaluation criteria below, and the average score was calculated to evaluate the anti-slip properties related to walking comfort. Criterion 1 (rating 0): Very slippery. Criterion 2 (rating point 1): Very slippery. Criterion 3 (rating point 2): Slightly slippery. Standard 4 (rating 3): The slipperiness cannot be described as either slippery or non-slip. Standard 5 (rating 4): Slightly non-slip. Standard 6 (rating point 5): Very slippery. Standard 7 (rating 6): Very slip-resistant.

[0096] ◎: The average score is 5 points or more. ○: The average score is 4 points or more. △: The average score is 2 points or more. ×: The average score is less than 2 points.

[0097] (6) Rating 6 (Flexibility) A three-point bending test was carried out, the maximum point test force was measured, and the flexibility of the quick-drying sheet was evaluated according to the following criteria.

[0098] ◎: The maximum point test force is 12N or less. ○: The maximum point test force is 16N or less. △: The maximum point test force is 20N or less. ×: The maximum point test force exceeds 20N.

[0099] (7) Rating 7 (glossiness) The glossiness (60° reflectance) of the obtained quick-drying sheet material was measured at any five points in accordance with JIS Z8741:1977. Next, the gloss difference, which is the difference between the maximum and minimum gloss values ​​measured, was calculated, and the gloss was evaluated according to the following criteria.

[0100] ⊚: The gloss difference is within the range of 1 to 3. ◯: The gloss difference is in the range other than ⊚ and is within the range of 0.5 to 3.5. △: The gloss difference is in the range other than ◯, and is within the range of 0.1 to 4. ×: The gloss difference is less than 0.1 or exceeds 4.

[0101] (8) Rating 8 (surface roughness) The surface roughness (Ra) of the obtained quick-drying sheet was measured at any five points in accordance with JIS B0601:1974 and JIS B0031:1994. Next, the maximum value of the measured surface roughness (Ra) was calculated, and the surface roughness (Ra) was evaluated according to the following criteria.

[0102] ⊚: The maximum surface roughness is within the range of 13 to 20 μm. ◯: The maximum value of the surface roughness is in the range other than ⊚ and is within the range of 8 to 25 μm. △: The maximum value of the surface roughness is in the range other than ◯, and is within the range of 3 to 30 μm. ×: The maximum surface roughness is less than 3 or exceeds 30 μm.

[0103] [Example 2] In Example 2, the embossing conditions were changed to prepare quick-drying sheets having the structures shown in Table 1. That is, the height of the convex portions on the flexible surface layer was 0.5 mm, the area ratio of the convex portions (φ1) was 76.5%, the area ratio of the groove portions (φ'1) was 23.5%, and the area ratio of regions with a height of 0.3 mm or less (φ2) was 23.5%. In addition, the number of grooves communicating with each other in the MD direction was 11 / 100 mm, and the number of grooves in the TD direction was 11 / 100 mm. Furthermore, it was confirmed that linear auxiliary protrusions (width: 2 mm, height: 0.8 mm, length: 8 mm, average spacing (CTC): 1.8 mm) were formed on the convex portions. Next, a cured resin film was formed from the curable resin in the same manner as in Example 1, and then the film was made into a quick-drying sheet and its quick-drying properties were measured. The obtained evaluation results are shown in Table 2.

[0104] [Example 3] In Example 3, the embossing conditions were changed to prepare quick-drying sheets having the structures shown in Table 1. That is, the height of the convex portions on the flexible surface layer was 0.7 mm, the area ratio of the convex portions (φ1) was 76.5%, the area ratio of the groove portions (φ'1) was 23.5%, and the area ratio of regions with a height of 0.3 mm or less (φ2) was 23.5%. In addition, the number of grooves in the MD direction (diagonal grooves with different angles, etc.) that communicate with each other was 44 / 100 mm, and the number of grooves in the TD direction (diagonal grooves with different angles, etc.) was 22 / 100 mm. On the other hand, it was confirmed that no linear or other auxiliary protrusions were formed on the convex portions. Next, in Example 3, a cured resin film was formed from the curable resin in the same manner as in Example 1, and then the film was made into a quick-drying sheet and its quick-drying properties were measured. The obtained evaluation results are shown in Table 2.

[0105] [Example 4] In Example 4, the embossing conditions were changed to prepare quick-drying sheets having the structures shown in Table 1. That is, the height of the convex portions on the flexible surface layer was 1.2 mm, the area ratio of the convex portions (φ1) was 70.3%, the area ratio of the groove portions (φ'1) was 29.7%, and the area ratio of regions with a height of 0.3 mm or less (φ2) was 29.7%. In addition, the number of grooves communicating with each other in the MD direction was 25 / 100 mm, and the number of grooves in the TD direction was 33 / 100 mm. On the other hand, it was confirmed that no linear or other auxiliary protrusions were formed on the convex portions. Next, in Example 4, a cured resin film was formed from the curable resin in the same manner as in Example 1, and then the film was made into a quick-drying sheet and its quick-drying properties were measured. The obtained evaluation results are shown in Table 2.

[0106] [Comparative Example 1] In Comparative Example 1, the embossing conditions were changed to produce a quick-drying sheet having a fairly wide groove width of 2.5 mm, as shown in Table 1. Next, in Comparative Example 1, a cured resin film was formed from the curable resin in the same manner as in Example 1, and then the film was made into a quick-drying sheet, and the quick-drying properties and the like were measured. As a result, as shown in Table 2, the area ratio (φ1) of the convex portions (diagonal, etc.) in the flexible surface layer was quite small at 46.7%, while the area ratio (φ´1) of the groove portions was quite large at 53.3%, and the area ratio (φ2) of the regions with a height of 0.3 mm or less was also large at 53.3%, and the groove width was significantly wide at 2.5 mm. It was also confirmed that no linear auxiliary protrusions were formed on the convex portions. Therefore, presumably due to this structure, the quick-drying time tended to be considerably long, at 780 minutes.

[0107] Comparative Example 2 In Comparative Example 2, the embossing conditions were changed to create a quick-drying sheet having two-stage height convex portions (high convex portions + low convex portions) and discontinuous grooves with a groove width of 0.6 mm, as shown in Table 1. Next, in Comparative Example 2, a cured resin film was formed from the curable resin in the same manner as in Example 1, and then the film was made into a quick-drying sheet, and the quick-drying properties and the like were measured. As a result, as shown in Table 2, the grooves in the flexible surface layer were discontinuous, and the total area ratio of the convex portions (high convex portions + low convex portions) in the flexible surface layer was quite large at 94.9% (46.4% + 48.5%), while the area ratio of the groove portions was quite small at 5.1%. It was also confirmed that a small number of linear or other auxiliary protrusions (width: 2 mm, height: 0.2 mm, length: 5 mm, average spacing (CTC): 4.4 mm) were formed on the convex portions in some areas. Therefore, presumably due to such a constitution, the quick-drying time tended to be considerably long, at 720 minutes.

[0108] Comparative Example 3 In Comparative Example 3, the embossing conditions were changed to create a quick-drying sheet having two levels of height (high protrusions + low protrusions) and a fairly wide groove width of 2.5 mm, as shown in Table 1. Next, in Comparative Example 3, a cured resin film was formed from the curable resin in the same manner as in Example 1, and then the film was made into a quick-drying sheet, and the quick-drying properties and the like were measured. As a result, as shown in Table 2, it was found that the area ratio (φ2) of the area of ​​the flexible surface layer with a height of 0.3 mm or less was 73.3%, which was considerably large. It was also confirmed that auxiliary protrusions, such as linear protrusions, were formed in some areas on the convex portions. Therefore, presumably due to this structure, the quick-drying time tended to be relatively long, at about 420 minutes.

[0109] Comparative Example 4 In Comparative Example 4, the embossing conditions were changed to produce a quick-drying sheet having intermittent and discontinuous recesses as shown in Table 1. Next, in Comparative Example 4, a cured resin film was formed from the curable resin in the same manner as in Example 1, and then the film was made into a quick-drying sheet, and the quick-drying properties and the like were measured. As a result, as shown in Table 2, it was found that the area ratio of the convex portions (φ1) in the flexible surface layer was small at 50%, while the area ratio of the region with a height of 0.3 mm or less (φ2) was considerably large at 100%. It was also confirmed that auxiliary protrusions such as linear protrusions were formed on a small portion of the convex portion. Therefore, presumably due to such a constitution, the quick-drying time tended to be considerably long, at 1000 minutes or more.

[0110] Comparative Example 5 In Comparative Example 5, as shown in Table 1, a commercially available floor sheet (manufactured by Tajima Co., Ltd.) was prepared, which is a quick-drying sheet with a fairly wide groove width of 2 mm, and the area ratios of the convex and groove portions were measured. As a result, as shown in Table 2, it was found that the area ratio of the convex portions (φ1) in the flexible surface layer was small at 31.9%, while the area ratio of the groove portions (φ'1) was considerably large at 68.1%. It was also confirmed that no linear auxiliary protrusions were formed on the convex portions. Therefore, presumably due to such a constitution, the quick-drying time tended to be considerably long, at 720 minutes or more.

[0111] Comparative Example 6 In Comparative Example 6, the embossing conditions were changed to produce a quick-drying sheet having a fairly wide groove width of 5 mm, as shown in Table 1. Next, in Comparative Example 6, a cured resin film was formed from the curable resin in the same manner as in Example 1, and then the film was made into a quick-drying sheet, and the quick-drying properties and the like were measured. As a result, as shown in Table 2, it was found that the area ratio of the convex portions (φ1) in the flexible surface layer was quite low at 35.1%, while the area ratio of the groove portions (φ'1) was quite high at 68.1%. It was also confirmed that no linear auxiliary protrusions were formed on the convex portions. Therefore, presumably due to such a constitution, the quick-drying time tended to be considerably long, at 1800 minutes or more.

[0112] Comparative Example 7 In Comparative Example 7, the embossing conditions were changed to produce a quick-drying sheet having a fairly wide groove width of 4 mm, as shown in Table 1. Next, in Comparative Example 7, a cured resin film was formed from the curable resin in the same manner as in Example 1, and then the film was made into a quick-drying sheet, and the quick-drying properties and the like were measured. As a result, as shown in Table 2, it was found that the groove width was too large, and the area ratio of the convex portions (φ1) in the flexible surface layer was 55%, and the area ratio of the groove portions (φ'1) was 45%, both of which were quite large. It was also confirmed that a circular auxiliary protrusion was formed on the convex portion. Therefore, presumably due to such a constitution, the quick-drying time tended to be considerably long, at 1800 minutes or more.

[0113] [Comparative Example 8] In Comparative Example 8, the embossing conditions were changed to produce quick-drying sheets with discontinuous grooves (diagonal grooves and irregular grooves) as shown in Table 1. Next, in Comparative Example 7, a cured resin film was formed from the curable resin in the same manner as in Example 1, and then the film was made into a quick-drying sheet, and the quick-drying properties and the like were measured. As a result, as shown in Table 2, the area ratio of the convex portions (φ1: 85%), the area ratio of the groove portions (φ´1: 15%), and the area ratio of the regions with a height of 0.3 mm or less (φ2: 15%) in the flexible surface layer were all reasonable values, but it was found that the shape of the grooves was not uniform and there was no continuity. It was also confirmed that no linear auxiliary protrusions were formed on the convex portions. Therefore, presumably due to such a constitution, the quick-drying time tended to be considerably long, at 2100 minutes or more.

[0114] [Table 1] *"-" in the table means that evaluation is not possible. *A rating of "○" for "groove continuity" means that at least 50% of the longitudinal and transverse grooves are interconnected.

[0115] [Table 2] [Industrial Applicability]

[0116] The quick-drying sheet material of the present invention comprises a flexible substrate on the back side and a flexible surface material having predetermined groove portions (horizontal grooves and vertical grooves) on the front side, with the number and width of the groove portions each being within a predetermined range, and convex portions being formed on the surface of the flexible surface material, with the area ratio of the convex portions being within a predetermined range.By this, even with a simple structure, it is possible to effectively utilize capillary action, etc., and exhibit excellent quick-drying properties. Therefore, when such a quick-drying sheet material is used as a flooring material in a predetermined location, even if a puddle is formed due to rainwater or the like, the puddle can be eliminated in an extremely short time. Moreover, when the amount of rainwater or the like is relatively small, it is possible to prevent the formation of puddles caused by rainwater or the like.

[0117] Furthermore, the quick-drying sheet material of the present invention can provide good sweeping performance with a broom or the like even when various types of garbage are supplied. Furthermore, the quick-drying sheet material of the present invention can exhibit excellent design and anti-slip properties due to its rectangular pattern, the shape and arrangement of the grooves, and the surface unevenness and color of the flexible surface material.

[0118] Therefore, as a flooring material that not only has designability and anti-slip properties but also exhibits good sweeping properties, its representative uses include aisle sheets, veranda sheets, entrance sheets, corridor sheets, wet area floor sheets, bath sheets, toilet sheets, ceiling sheets, waterproof sheets, etc. It minimizes the formation of puddles caused by rainwater, etc., and if puddles do form, it can solve various problems (slips, difficulty walking, water splashes, sludge formation, mold growth, etc.) in a short period of time, and it can be said that its industrial applicability is extremely high. [Explanation of symbols]

[0119] 10, 10´, 10´´: Quick-drying sheets 12: Convex part 12a: First rectangular pattern 12b: Second rectangular pattern 12c:Groove 12d: Auxiliary projection 13: Flexible surface material 14: Middle layer (reinforced fiber layer) 16:Flexible base 18: Surface protective layer

Claims

1. A quick-drying sheet product comprising at least a flexible substrate and a flexible surface material having 10 or more interconnected horizontal grooves and 10 or more interconnected vertical grooves per unit length (100 mm), The widths of the horizontal and vertical grooves are each set to a value within a range of 0.2 to 1.2 mm, and convex portions defined by the horizontal and vertical grooves are formed on the surface of the flexible surface material, and the area ratio (φ1) of the convex portions per unit area (100%) is set to a value within a range of 70 to 90%.

2. The quick-drying sheet material according to claim 1, characterized in that the area ratio (φ2) of areas with a height of 0.3 mm or less per unit area on the surface of the flexible surface material is set to a value within the range of 10 to 40%.

3. 3. The quick-drying sheet material according to claim 1, wherein the rectangular patterns defined by the horizontal grooves and vertical grooves include a first rectangular pattern having a size of at least 0.6 cm x 0.6 cm and a second rectangular pattern having a size of at least 0.8 cm x 0.8 cm.

4. 3. The quick-drying sheet material according to claim 1, wherein the flexible surface material has auxiliary protrusions in the form of lines and / or dots on the surface of the convex portions.

5. 5. The quick-drying sheet material according to claim 4, wherein the height of the convex portions is set to a value within a range of 0.2 to 2 mm, and the height of the auxiliary protrusions is set to a value within a range of 0.1 to 3 mm.

6. 3. The quick-drying sheet material according to claim 1, wherein a surface protective layer made of a curable resin is formed on the entire or part of the surface of the flexible surface material.

7. 3. The quick-drying sheet material according to claim 1, wherein the glossiness measured in accordance with JIS Z8741:1977 is in the range of 0.5 to 5.

8. 3. The quick-drying sheet material according to claim 1, wherein the surface roughness (Ra) measured in accordance with JIS B0601:1974 and JIS B0031:1994 is set to a value within the range of 5 to 20 μm.

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