Floor sheet

Abstract

To provide a floor sheet which can secure cut-off performance and foreign matter intrusion prevention without using a seal material.SOLUTION: A floor sheet includes a base layer, and a surface layer stacked on the surface side of the base layer through an adhesive layer, wherein the base layer is formed of a plurality of first patch sheets arranged so that their outer edges are abutted on each other, the surface layer is formed of a plurality of second patch sheets arranged so that their outer edges are abutted on each other, a seam of the first patch sheets and a seam of the second patch sheets are overlapped with each other in plan view and do not run in parallel with each other, a seal material is not used in at least the seam of the second patch sheets, and the adhesive layer has a seam along the seam of the second patch sheet.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a floor sheet. [Background technology]

[0002] Floor structures provided in vehicles such as trains and buses, buildings, etc. are formed by laminating floor sheets on the surface of flooring. Such floor structures generally have a large area, and it is difficult to cover the surface of the flooring with a single floor sheet. For example, to cover the surface of a railway flooring, a long rubber sheet is used, and multiple sheets are used to cover the entire width of the railway vehicle floor from one end to the other (see, for example, International Publication No. 2018 / 008277).

[0003] When multiple floor sheets are used side by side in this way, there is a risk that water or foreign matter may seep in from the joints where the outer edges meet to the surface of the floor structure. For this reason, a sealant is applied to the joints to stop water from entering and to prevent foreign matter from entering. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2018 / 008277 Summary of the Invention [Problem to be solved by the invention]

[0005] When a sealant is used at the joints of floor sheets, the number of steps required for construction increases, leading to increased construction time and costs, and discontinuous areas of different hardness and height tend to occur on the surface of the floor sheets near the joints.

[0006] The present invention has been made in consideration of the above circumstances, and has an object to provide a floor sheet that can ensure watertightness and prevention of intrusion of foreign matter without using a sealing material. [Means for solving the problem]

[0007] A floor sheet according to one embodiment of the present invention comprises a base layer and a surface layer laminated to the surface side of the base layer via an adhesive layer, wherein the base layer is formed from a plurality of first patch sheets arranged with their outer edges butted together, and the surface layer is formed from a plurality of second patch sheets arranged with their outer edges butted together, and the seams between the first patch sheets and the seams between the second patch sheets do not overlap or run parallel to each other in a planar view. Effect of the Invention

[0008] The floor sheet of the present invention can ensure waterproofing and prevention of intrusion of foreign matter without using a sealant. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic perspective view showing a floor sheet according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic enlarged cross-sectional view showing the vicinity of the joint between the second patch sheets of the floor sheet in FIG. [Diagram 3] FIG. 3 is a schematic plan view showing a floor sheet different from that in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] [Description of the embodiment of the present invention] First, the embodiments of the present invention will be listed and described.

[0011] A floor sheet according to one embodiment of the present invention comprises a base layer and a surface layer laminated to the surface side of the base layer via an adhesive layer, wherein the base layer is formed from a plurality of first patch sheets arranged with their outer edges butted together, and the surface layer is formed from a plurality of second patch sheets arranged with their outer edges butted together, and the seams between the first patch sheets and the seams between the second patch sheets do not overlap or run parallel to each other in a planar view.

[0012] In this floor sheet, the seams between the surface layer and the base layer do not overlap and run parallel in a plan view. In addition, since the surface layer and the base layer are sealed with an adhesive layer, even if water or foreign matter infiltrates through the seam of the surface layer, it is difficult for the water or foreign matter to reach the seam of the base layer because it is prevented from moving along the adhesive layer at the boundary between the surface layer and the base layer. Therefore, this floor sheet can prevent water or foreign matter from reaching the surface of the floor structure, so that water stopping and prevention of foreign matter intrusion can be ensured without using a sealant.

[0013] It is preferable that at least a sealant is not used at the joint between the second patch sheets. As described above, the floor sheet can ensure watertightness and prevention of intrusion of foreign matter even without using a sealant at the joint between the second patch sheets.

[0014] It is preferable that a pair of outer edges constituting the seam between the second patch sheets are butted on the front side and spaced apart on the back side. By butting the pair of outer edges constituting the seam between the second patch sheets on the front side and spaced apart on the back side in this manner, the contact pressure at the butted portion is increased, thereby improving the effects of waterproofing and preventing the intrusion of foreign matter.

[0015] The adhesive layer may have a convex portion protruding between a pair of outer edges that form the seam between the second patch sheets. By providing the adhesive layer with a convex portion protruding between the pair of outer edges in this manner, the effects of water blocking and preventing intrusion of foreign matter can be further improved.

[0016] Preferably, the first patch sheets and the second patch sheets are each long and arranged with their longitudinally extending outer edges butting against each other. By configuring the first patch sheets and the second patch sheets in this manner, the seams between the first patch sheets and the seams between the second patch sheets do not intersect in a plan view, thereby further improving the effects of waterproofing and preventing the intrusion of foreign matter.

[0017] In a plan view, the minimum distance between the seams of the first patch sheets and the seams of the second patch sheets is preferably 2 cm or more. By setting the minimum distance to be equal to or greater than the lower limit, the effects of waterproofing and preventing the intrusion of foreign matter can be further improved.

[0018] Here, "not overlapping and running parallel in a planar view" refers not only to no overlap in a planar view, but also to the concept of the angle between the tangents of each seam at the overlapping points in a planar view being 80 degrees or more, preferably 90 degrees.

[0019] [Details of the embodiment of the present invention] Hereinafter, a floor sheet according to one embodiment of the present invention will be described with reference to the drawings.

[0020] The floor sheet 1 shown in Fig. 1 includes a base layer 10 and a surface layer 20 laminated on the surface side of the base layer 10. The surface layer 20 is laminated via a first adhesive layer 30. The floor sheet 1 also includes a second adhesive layer 40 on the back side of the base layer 10.

[0021] The floor sheet 1 is laid on a floor surface X of a vehicle, a building, etc. In particular, the floor sheet 1 is suitably laid on the floor surface X of a railway vehicle.

[0022] <Base layer> The base layer 10 is formed by a plurality of first patch sheets 11. The plurality of first patch sheets 11 are arranged with their outer edges 11a butting against each other. Specifically, the plurality of first patch sheets 11 are each long and are arranged with their outer edges 11a extending in the longitudinal direction butting against each other.

[0023] The first patch sheet 11 is formed of a flame-retardant rubber composition. This flame-retardant rubber composition is obtained by vulcanizing one or more rubber components. This flame-retardant rubber composition preferably contains an inorganic flame retardant in addition to the rubber component. The rubber component may be one that has been vulcanized in advance. As the rubber component, for example, styrene-butadiene rubber or the like can be adopted. Here, the styrene / butadiene weight ratio is not particularly limited, but is preferably 23.5 or more and less than 46. Within this ratio range, processing can be easily performed using ordinary rubber processing equipment.

[0024] The inorganic flame retardant contained in the flame-retardant rubber composition is preferably 50 parts by weight or more, more preferably 55 parts by weight or more, and even more preferably 60 parts by weight or more, based on 100 parts by weight of the rubber component contained in the flame-retardant rubber composition. The inorganic flame retardant is preferably less than 90 parts by weight, more preferably less than 80 parts by weight, and even more preferably less than 70 parts by weight, based on 100 parts by weight of the rubber component contained in the flame-retardant rubber composition. When the content of the inorganic flame retardant is equal to or more than the lower limit, the flame retardancy of the floor sheet 1 is improved, and when the content is less than the upper limit, the deterioration of the rubber properties of the floor sheet 1 can be suppressed.

[0025] Various inorganic flame retardants can be used in the flame-retardant rubber composition, but aluminum hydroxide, antimony trioxide, or both are preferable from the viewpoint of suppressing smoke generation. Furthermore, from the viewpoint of enhancing flame retardancy such as reducing smoke generation, it is preferable that the flame-retardant rubber composition forming the first patch sheet 11 contains chlorinated paraffin as a non-inorganic flame retardant in addition to aluminum hydroxide and antimony trioxide.

[0026] The aluminum hydroxide is preferably contained in an amount of 70 parts by weight or more, more preferably 75 parts by weight or more, and even more preferably 78 parts by weight or more, based on 100 parts by weight of the rubber component contained in the flame-retardant rubber composition. The aluminum hydroxide is preferably contained in an amount of less than 88 parts by weight, more preferably less than 85 parts by weight, and even more preferably less than 82 parts by weight, based on 100 parts by weight of the rubber component contained in the flame-retardant rubber composition. When the content of aluminum hydroxide is equal to or more than the lower limit, the amount of smoke generated can be suppressed and the flame retardancy of the floor sheet 1 can be improved, and when the content is less than the upper limit, the deterioration of the rubber properties can be suppressed.

[0027] The antimony trioxide is preferably contained in an amount of 2 parts by weight or more, more preferably 3 parts by weight or more, and even more preferably 4 parts by weight or more, based on 100 parts by weight of the rubber component contained in the flame-retardant rubber composition. The antimony trioxide is preferably contained in an amount of less than 8 parts by weight, more preferably less than 7 parts by weight, and even more preferably less than 6 parts by weight, based on 100 parts by weight of the rubber component contained in the flame-retardant rubber composition. When the content of antimony trioxide is equal to or more than the lower limit, the flame retardancy of the floor sheet 1 is improved, and when the content is less than the upper limit, deterioration of the rubber properties can be suppressed.

[0028] Furthermore, the chlorinated paraffin is preferably contained in an amount of 0.5 parts by weight or more, more preferably 1 part by weight or more, and even more preferably 1.5 parts by weight or more, based on 100 parts by weight of the rubber component contained in the flame-retardant rubber composition. The chlorinated paraffin is preferably contained in an amount of less than 15 parts by weight, more preferably less than 10 parts by weight, and even more preferably less than 9 parts by weight, based on 100 parts by weight of the rubber component contained in the flame-retardant rubber composition. When the content of the chlorinated paraffin is equal to or more than the lower limit, the flame retardancy of the floor sheet 1 is improved, and when the content is less than the upper limit, the toxicity of the combustion gas generated during combustion can be reduced.

[0029] The carbon number and chlorination rate of this chlorinated paraffin are not particularly limited, but the carbon number is preferably from 12 to less than 26. Moreover, the chlorination rate expressed as the ratio of the atomic weight of chlorine atoms in the molecular weight of the chlorinated paraffin is preferably from 40% to less than 70% from the viewpoint of imparting flame retardancy.

[0030] In addition, the flame-retardant rubber composition forming the first patch sheet 11 can contain various additives such as clay, calcium carbonate, zinc oxide, and titanium oxide in addition to the flame retardants described above.

[0031] The lower limit of the thickness of the first patch sheet 11 is preferably 0.5 mm, more preferably 1 mm. On the other hand, the upper limit of the thickness of the first patch sheet 11 is preferably 2 mm, more preferably 1.5 mm. If the thickness of the first patch sheet 11 is less than the lower limit, the strength of the base layer 10 may be insufficient. Conversely, if the thickness of the first patch sheet 11 exceeds the upper limit, the handling may be difficult, such as it being difficult to roll up and store. Here, the "thickness" means the average thickness measured in accordance with JIS K7130. Specifically, it means the average value of the thickness measured at 10 points at equal intervals in the width direction of the first patch sheet 11 using a thickness meter. The thickness is defined similarly for other members.

[0032] The length of the first patch sheet 11 is not particularly limited, but it is preferable that the first patch sheet 11 has a length that covers the entire longitudinal area of ​​the floor surface X of the railway vehicle with one piece of the first patch sheet 11. Specifically, the lower limit of the length of the first patch sheet 11 is preferably 10 m, more preferably 12 m, even more preferably 14 m, and particularly preferably 16 m. On the other hand, the upper limit of the length of the first patch sheet 11 is preferably 28 m, more preferably 26 m, even more preferably 24 m, and particularly preferably 22 m.

[0033] The width (length in the short direction) of the first patch sheet 11 is not particularly limited, but it is preferable that the first patch sheet 11 has a width such that a plurality of first patch sheets 11 (for example, three sheets) cover the entire width of the floor surface of the railway vehicle. Specifically, the lower limit of the width of the first patch sheet 11 is preferably 0.3 m, more preferably 0.5 m, and even more preferably 0.9 m. On the other hand, the upper limit of the width of the first patch sheet 11 is preferably 1.5 m, and more preferably 1.2 m. If the width of the first patch sheet 11 is less than the above lower limit, the number of seams 11b between the first patch sheets 11 will be large, which may reduce the effect of waterproofing and preventing the intrusion of foreign matter. Conversely, if the width of the first patch sheet 11 exceeds the above upper limit, handling may become difficult. Note that the widths of the plurality of first patch sheets 11 are not necessarily the same.

[0034] It is preferable that a pair of outer edges 11a constituting the seam 11b between the first patch sheets 11 are butted together over the entire length and are not spaced apart. By not spaced apart the seam 11b between the first patch sheets 11 in this manner, it is easy to prevent water or foreign matter from entering the surface of the floor surface X.

[0035] <Surface layer> The surface layer 20 is formed by a plurality of second patch sheets 21. The plurality of second patch sheets 21 are arranged with their outer edges 21a butting against each other. Specifically, the plurality of second patch sheets 21 are each elongated, and are arranged with their outer edges 21a extending in the longitudinal direction butting against each other.

[0036] Furthermore, the seams 11b between the first patch sheets 11 and the seams 21b between the second patch sheets 21 do not overlap or run parallel to each other in a plan view. In the floor sheet 1, the first patch sheets 11 and the second patch sheets 21 are long and arranged with their outer edges 11a, 21a extending in the longitudinal direction butting against each other, so that the seams 11b between the first patch sheets 11 and the seams 21b between the second patch sheets 21 do not intersect in a plan view. This configuration can further improve the effects of waterproofing and preventing the intrusion of foreign matter.

[0037] The second patch sheet 21 can have the same composition as the first patch sheet 11. In particular, from the viewpoint of ensuring the adhesive strength of the first adhesive layer 30, it is preferable that the first patch sheet 11 and the second patch sheet 21 have the same composition.

[0038] The thickness of the second patch sheet 21 can be similar to the thickness of the first patch sheet 11. The thickness of the first patch sheet 11 and the thickness of the second patch sheet 21 may be different.

[0039] The length of the second patch sheet 21 is not particularly limited, but is set to be the same length as that of the first patch sheet 11 .

[0040] The width of the second patch sheet 21 can be the same as that of the first patch sheet 11, but the width is appropriately adjusted so that the seams 11b between the first patch sheets 11 and the seams 21b between the second patch sheets 21 do not overlap and run parallel to each other in a plan view. For this reason, the widths of the multiple second patch sheets 21 are not necessarily the same, but from the viewpoint of design, it is preferable that the widths of the multiple second patch sheets 21 are the same.

[0041] In a plan view, the minimum distance between the seams 11b between the first patch sheets 11 and the seams 21b between the second patch sheets 21 is preferably 2 cm, more preferably 5 cm, and even more preferably 10 cm. By setting the minimum distance to be equal to or greater than the lower limit, the effects of water stoppage and prevention of intrusion of foreign matter can be further improved. In particular, it is particularly preferable that the seam 11b between the first patch sheets 11 is located in the center of the second patch sheet 21 in the width direction, as shown in FIG. 1. By positioning the seam 11b between the first patch sheets 11 in this manner, the effects of water stoppage and prevention of intrusion of foreign matter can be maximized.

[0042] It is preferable that no sealant is used at least in the joints 21b between the second patch sheets 21, and preferably in both the joints 11b between the first patch sheets 11 and the joints 21b between the second patch sheets 21. The floor sheet 1 can ensure watertightness and prevention of intrusion of foreign matter even without using a sealant in the joints 21b between the second patch sheets 21.

[0043] A pair of outer edges 21a constituting the seam 21b between the second patch sheets 21 are butted together on the front side and spaced apart on the back side, as shown in Fig. 2. By butting together the pair of outer edges 21a constituting the seam 21b between the second patch sheets 21 on the front side and spaced apart on the back side in this manner, the contact pressure at the butted portion is increased, thereby improving the effects of waterproofing and preventing the intrusion of foreign matter.

[0044] <First adhesive layer> The first adhesive layer 30 bonds the first patch sheet 11 and the second patch sheet 21 together.

[0045] The lower limit of the thickness of the first adhesive layer 30 is preferably 50 μm, more preferably 60 μm, and even more preferably 70 μm. On the other hand, the upper limit of the thickness of the first adhesive layer 30 is preferably 500 μm, more preferably 300 μm, and even more preferably 200 μm. By making the thickness of the first adhesive layer 30 equal to or greater than the above lower limit, the first patch sheet 11 and the second patch sheet 21 can be firmly fixed together, and as a result, the relative positional change and peeling between the first patch sheet 11 and the second patch sheet 21 can be more reliably suppressed. On the other hand, if the thickness of the first adhesive layer 30 exceeds the above upper limit, there is a risk that the first patch sheet 11 and the second patch sheet 21 may easily become misaligned during construction or use.

[0046] Examples of the first adhesive layer 30 include a layer formed from an adhesive, a layer formed from a pressure-sensitive adhesive, and a layer formed from a double-sided tape having a film-like substrate and pressure-sensitive adhesive layers laminated on both sides of the substrate. As the first adhesive layer 30, a layer having adhesive properties, i.e., a layer formed from a pressure-sensitive adhesive and a layer formed from the double-sided tape, is preferred, and a layer formed from a pressure-sensitive adhesive is more preferred. A layer having a pressure-sensitive adhesive can be easily laid, and when a peeling operation is required, it has excellent peelability, and is easy to handle and durable.

[0047] When the first adhesive layer 30 is formed from an adhesive, examples of the adhesive include reactive adhesives such as two-part mixed adhesives, hot melt adhesives, solvent adhesives, and water-dispersed adhesives.

[0048] When the first adhesive layer 30 is formed of an adhesive, examples of the adhesive include silicone-based adhesives mainly composed of silicone rubber, rubber-based adhesives mainly composed of rubber other than silicone rubber, acrylic-based adhesives mainly composed of acrylic resin, and urethane-based adhesives mainly composed of urethane resin, among which acrylic-based adhesives are preferred. Here, the term "main component" refers to the component with the highest content, for example, a component with a content of 50% by mass or more.

[0049] The acrylic resin, which is the main component of the acrylic pressure-sensitive adhesive, can be obtained by, for example, vinyl polymerization of (meth)acrylic acid alkyl ester by a conventional method. In addition, the acrylic resin may be a copolymer of (meth)acrylic acid alkyl ester and a modifying monomer from the viewpoint of improving optical properties, heat resistance, etc.

[0050] The (meth)acrylic acid alkyl ester has a linear or branched alkyl group. The lower limit of the number of carbon atoms of the alkyl group is usually 1, and preferably 4. On the other hand, the upper limit of the number of carbon atoms of the alkyl group is preferably 18, and more preferably 12. Specific examples of the (meth)acrylic acid alkyl ester include butyl (meth)acrylate, isobutyl (meth)acrylate, hexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isooctyl (meth)acrylate, isononyl (meth)acrylate, allyl (meth)acrylate, lauryl (meth)acrylate, and stearyl (meth)acrylate. The (meth)acrylic acid alkyl ester may be used alone or in combination of two or more kinds.

[0051] The acrylic adhesive may further contain a curing agent such as an isocyanate curing agent, a plasticizer, an antioxidant, a reinforcing agent, a filler, an antifoaming agent, a surfactant, and the like. When the acrylic adhesive contains the curing agent, the lower limit of the content of the curing agent in the acrylic adhesive is preferably 0.1 parts by mass, more preferably 0.4 parts by mass, and even more preferably 0.8 parts by mass, relative to 100 parts by mass of the acrylic adhesive. On the other hand, the upper limit of the content of the curing agent is preferably 5 parts by mass, more preferably 3 parts by mass, and even more preferably 1.5 parts by mass, relative to 100 parts by mass of the acrylic adhesive. If the content of the curing agent is less than the lower limit, the elasticity of the adhesive layer 2 may decrease. Conversely, if the amount of the curing agent added exceeds the upper limit, the adhesive strength of the adhesive layer 2 may be insufficient.

[0052] When the first adhesive layer 30 is formed by a double-sided tape, examples of the base material of the double-sided tape include paper, synthetic resin film, cloth, etc. Also, examples of the adhesive forming the pressure-sensitive adhesive layer of the double-sided tape include the same adhesives as those described above.

[0053] Depending on the application method, the first adhesive layer 30 can be provided continuously over the entire interface between the base layer 10 and the surface layer 20, but when it is provided on the back side of the second patch sheet 21 constituting the surface layer 20, for example, it can be configured to have a seam 31b along the seam 21b of the second patch sheet 21 as shown in Figure 1. Even in this configuration, the adhesive force between the first adhesive layers 30 provides the same water-stopping and foreign matter intrusion prevention effects as when the first adhesive layers 30 are provided continuously over the entire interface.

[0054] 2, the first adhesive layer 30 has a convex portion 32 that protrudes between a pair of outer edges 21a that constitute the seam 21b between the second patch sheets 21. By providing the first adhesive layer 30 with the convex portion 32 that protrudes between the pair of outer edges 21a in this manner, the effects of water blocking and preventing intrusion of foreign matter can be further improved. The convex portion 32 can be formed, for example, by a compressive force when bonding the surface layer 20 to the base layer 10.

[0055] The convex portion 32 is preferably provided so as to contact the pair of outer edges 21a. The lower limit of the height of the convex portion 32 is preferably 0.01 mm, more preferably 0.05 mm. On the other hand, the upper limit of the height of the convex portion 32 is preferably 0.15 mm, more preferably 0.1 mm. If the height of the convex portion 32 is less than the lower limit, the effect of improving the water-stopping property and the prevention of intrusion of foreign matter may be insufficient. Conversely, if the height of the convex portion 32 exceeds the upper limit, it may be difficult to form the convex portion 32 while ensuring the adhesive strength of the first adhesive layer 30 during construction.

[0056] <Second adhesive layer> The second adhesive layer 40 bonds the floor surface X and the base layer 10. The second adhesive layer 40 can be configured in the same manner as the first adhesive layer 30, and therefore a detailed description thereof will be omitted.

[0057] <Construction method> The following describes a method for installing the floor sheet 1. Note that the installation method described below is merely an example, and does not preclude the installation of the floor sheet 1 by other methods.

[0058] The method for applying the floor sheet 1 includes a preparation step, a base layer forming step, and a surface layer forming step.

[0059] (preparation process) In the preparation step, the first patch sheet 11 and the second patch sheet 21 are preliminarily processed.

[0060] In processing the first patch sheet 11, for example, after the first patch sheet 11 is vulcanized and molded, the second adhesive layer 40 is applied to the back side (ground surface side), and the back side is further entirely covered with a release sheet.

[0061] As the release sheet, various materials can be used, and it can be made of, for example, a plastic film such as polyethylene terephthalate or polyethylene, or a paper material such as crepe paper or release paper. However, from the viewpoint of increasing the breaking elongation rate and the elongation recovery rate, a polyethylene sheet or crepe paper is preferably used as the release sheet.

[0062] The lower limit of the breaking elongation of the release sheet is preferably 10%, more preferably 20%, even more preferably 30%, and particularly preferably 40%. The lower limit of the elongation recovery of the release sheet is preferably 50%, more preferably 60%, even more preferably 70%, and particularly preferably 80%. By setting the breaking elongation and elongation recovery of the release sheet to the lower limit or more, when the processed first patch sheet 11 is stored in a state of being wound around a core material or the like, there is an advantage that the release sheet does not wrinkle, break, or have a gap between the second adhesive layer 40. The breaking elongation is a value measured according to JIS K6251. The elongation recovery is a value measured according to JIS L1096.

[0063] The release sheet may have a dividing line along the longitudinal direction. For example, a single dividing line may be provided, and release pieces may be formed on the left and right of the dividing line, and the release sheet may be composed of a pair of release pieces. By providing a dividing line on the release sheet, the release sheet may be separated into two release pieces and peeled off. In this case, with only one release piece peeled off, the first patch sheet 11 is aligned and attached to the floor surface X, and then the other release piece is peeled off and attached to fix the first patch sheet 11 to the floor surface X. By following such a procedure, it is possible to prevent the first patch sheet 11 from being accidentally displaced during application.

[0064] Here, the dividing line can be a cutting line that penetrates the sheet in the thickness direction from the front surface to the back surface, or can be an easy-to-cut line for easily cutting the sheet when dividing it in the longitudinal direction during peeling, etc. This easy-to-cut line can be, for example, a perforation or a surface groove.

[0065] The second patch sheet 21 can be processed in a similar manner. That is, in processing the second patch sheet 21, for example, after the second patch sheet 21 is vulcanization molded, the first adhesive layer 30 is applied to the back side (ground surface side), and the entire back side is further covered with a release sheet.

[0066] (Base layer formation process) In the base layer forming step, a plurality of first patch sheets 11 are attached to the floor surface X to form the base layer 10.

[0067] Specifically, the release sheets of the multiple first patch sheets 11 are peeled off, and the first patch sheets 11 are attached to the floor surface X while being arranged with their outer edges 11a butted against each other.

[0068] (Surface layer formation process) In the surface layer forming step, the surface layer 20 is formed by bonding a plurality of second patch sheets 21 to the base layer 10.

[0069] Specifically, the release sheets of the second patch sheets 21 are peeled off, and the second patch sheets 21 are attached to the base layer 10 while being arranged with their outer edges 21a butted against each other. At this time, the second patch sheets 21 are arranged so that the seams 21b between the second patch sheets 21 do not overlap and run parallel to the seams 11b between the first patch sheets 11 in a plan view. This arrangement is realized by adjusting the widths of the first patch sheets 11 and the second patch sheets 21 in advance. For example, for four first patch sheets 11, the widths of the two first patch sheets 11 at both ends are set to 450 mm, the widths of the two first patch sheets 11 in the center are set to 9000 mm, and all the three second patch sheets 21 are set to 900 mm, so that the seams 21b between the second patch sheets 21 do not overlap and run parallel to the seams 11b between the first patch sheets 11 in a plan view, as shown in FIG. 1.

[0070] By following the above procedure, the floor sheet 1 can be applied to, for example, the floor surface X of a railway vehicle.

[0071] <Advantages> In the floor sheet 1, the seams 11b, 21b between the surface layer 20 and the base layer 10 do not overlap and run parallel in a plan view. In addition, since the space between the surface layer 20 and the base layer 10 is sealed with the first adhesive layer 30, even if water or foreign matter infiltrates through the seam 21b of the surface layer 20, it is difficult for the water or foreign matter to reach the seam 11b of the base layer 10 because it is prevented from moving along the first adhesive layer 30 at the boundary between the surface layer 20 and the base layer 10. Therefore, the floor sheet 1 can prevent water or foreign matter from reaching the surface of the floor structure, so that watertightness and prevention of foreign matter intrusion can be ensured without using a sealant.

[0072] [Other embodiments] The present invention is not limited to the above-described embodiment, and can be embodied in various other forms in addition to the above-described forms with various modifications and improvements.

[0073] In the above embodiment, the first patch sheets and the second patch sheets are each long and are arranged with their longitudinally extending outer edges butted against each other. However, the shape and butting method of the first patch sheets and the second patch sheets are not limited to this, as long as the seams between the first patch sheets and the seams between the second patch sheets do not overlap and run parallel to each other in a plan view. For example, the first patch sheets and the second patch sheets may be configured as concentric rings, with adjacent rings butted against each other. In addition, the same effect can be achieved even if the first patch sheets 12 and the second patch sheets 22 are each rectangular and the vertical and horizontal seams are perpendicular to each other in a plan view, that is, they do not overlap and run parallel to each other in a plan view, as in the floor sheet 2 shown in FIG. 3.

[0074] In the above embodiment, a configuration has been described in which the pair of outer edges that form the seam between the second patch sheets are butted together on the front side and spaced apart on the back side, but the configuration of the pair of outer edges that form the seam between the second patch sheets is not limited to this. For example, the pair of outer edges may be butted together over their entire length and not spaced apart.

[0075] Furthermore, a configuration in which the adhesive layer has a convex portion protruding between a pair of outer edges that form the seam between the second patch sheets is not a required configuration, and an adhesive layer that does not have the above-mentioned convex portion is also intended by the present invention. [Industrial Applicability]

[0076] The floor sheet of the present invention can ensure waterproofing and prevention of intrusion of foreign matter without using a sealant. [Explanation of symbols]

[0077] 1, 2 Floor seats 10 Base Layer 11, 12 1st patch sheet 11a Outer edge 11b Seam 20 Surface layer 21, 22 2nd patch sheet 21a Outer edge 21b Seam 30 1st adhesive layer 31b Seam 32 Convex part 40 Second adhesive layer X Floor

Claims

1. A base layer; a surface layer laminated on a surface side of the base layer via an adhesive layer; Equipped with the base layer is formed by a plurality of first patch sheets arranged with their outer edges butted together; The surface layer is formed by a plurality of second patch sheets arranged with their outer edges butted against each other, a seam between the first patch sheets and a seam between the second patch sheets do not overlap and run parallel to each other in a plan view; At least, no sealant is used at the joints between the second patch sheets, The adhesive layer has a seam along the seam of the second patch sheet.

2. A base layer; a surface layer laminated on a surface side of the base layer via an adhesive layer; Equipped with the base layer is formed by a plurality of first patch sheets arranged with their outer edges butted together; The surface layer is formed by a plurality of second patch sheets arranged with their outer edges butted against each other, a seam between the first patch sheets and a seam between the second patch sheets do not overlap and run parallel to each other in a plan view; A floor sheet in which a pair of outer edges constituting the joint between the second patch sheets are butted together on the front side and spaced apart on the back side.

3. 3. The floor sheet according to claim 2, wherein the adhesive layer has a convex portion protruding between a pair of outer edges that form the seam between the second patch sheets.

4. A base layer; a surface layer laminated on a surface side of the base layer via an adhesive layer; Equipped with the base layer is formed by a plurality of first patch sheets arranged with their outer edges butted together; The surface layer is formed by a plurality of second patch sheets arranged with their outer edges butted against each other, a seam between the first patch sheets and a seam between the second patch sheets do not overlap and run parallel to each other in a plan view; The floor sheets are each elongated, and the plurality of first patch sheets and the plurality of second patch sheets are arranged with their outer edges extending in the longitudinal direction butting against each other.

5. 5. The floor sheet according to claim 4, wherein the minimum distance between the seams of the first patch sheets and the seams of the second patch sheets is 2 cm or more in a plan view.

Images