JP2010181700A - Display sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display sheet whose visibility of the display and decoration is hardly deteriorated by wearing of the printing surface even if it is used without a protection layer for the outdoor floor whereon people walk frequently. <P>SOLUTION: The display sheet is configured in such a way that: the surface of a base material 10 is formed into a rugged face composed of projecting parts 10a and recessed parts 10b; an arithmetic mean height (Ra) of a roughness curve under a specific cutoff value &lambda;s 0.25 mm and &lambda;c 8 mm is within the range of 10-50 &mu;m on the surface of the base material 10; an ink layer 13 is formed of fine ink covering the projecting parts 10a and penetrating into recessed parts 10b; and an adhesive layer 15 which sticks to a floor face or a wall face is formed on the rear face of the base material 10. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a display sheet that can be affixed to an asphalt pavement, concrete, or mortar paved floor as a simple advertisement or guidance sign in a place where pedestrians come and go indoors and outdoors.

  Conventionally, sheets having high displayability and decorativeness for the purpose of outdoor or indoor information, advertisement or guidance are often used on wall surfaces and floor surfaces. If it is limited to the outdoors, such display sheets are attached to the floors of roads, viaducts, station platforms, building rooftops, parking lots, etc., so that every space can be used as an information medium such as advertisements, guidance signs and guidance. This is also common in everyday life. And when this display sheet is attached to an outdoor floor surface as described above, it is required that the display property or decoration is not lost even if it is exposed to a pedestrian's heavy traffic on the floor surface. Therefore, such a display sheet is generally covered with a transparent protective film having mechanical durability or mechanical strength such as abrasion resistance and scratch resistance on the printed surface of a sheet on which information such as an advertisement or a guide sign is printed, Thereby, the desired strength and appearance are maintained. For this purpose, a protective film imparted with an effect on contamination resistance has been proposed (for example, refer to Patent Document 1), which is not limited to durability. A method of forming a protective layer on the surface by coating has also been proposed (see, for example, Patent Document 2). And such a protective film or protective layer is supposed to improve mechanical durability, abrasion resistance, and scratch resistance.

  Moreover, as a display sheet affixed on a floor surface, the non-slip property of a surface is calculated | required as performance different from the thing for signs and wall surfaces other than a floor surface. That is, it is because a pedestrian must be able to walk safely on the display sheet affixed on the floor surface. As a method for improving the anti-slip property, a type in which inorganic particles forming convex portions are dispersed and fixed on the sheet surface (see, for example, Patent Document 3), and a specific surface treatment is performed by applying a roughness imparting process to the sheet surface. A type in which a surface shape is formed (for example, see Patent Document 4) is known. The former is an extension of the idea of providing a protective layer on the printing surface, and hard particles added rather than the main synthetic resin used for the protective layer impart a non-slip function. The latter is premised on the installation of a protective layer, and the main material that forms the surface of the protective layer, that is, the surface of a synthetic resin or the like is processed into a specific shape, thereby achieving anti-slip properties. It can be secured.

JP-A-8-118553 (Claims, FIG. 1) Japanese Patent Laid-Open No. 11-10823 (Claims, FIG. 1) JP-A-2-144461 (Claims) Japanese Patent Laying-Open No. 2003-39582 (Claims, FIGS. 1 and 2)

  However, in order to protect the printed surface, protecting the printed surface with a protective film or protective layer requires an operation of covering the printed surface with the protective film or an operation of forming a protective layer separately from the printing operation. There was a problem that the unit price of the product was pushed up due to the increased work man-hours. In order to avoid this, it is conceivable to omit the protective layer formed on the printing surface, but if the protective layer is omitted, the abrasion resistance and scratch resistance of the printing surface will be inferior, The anti-slip property of the surface also results in poor results.

  The object of the present invention is to provide a printing surface even when used on an outdoor floor surface where frequent walking is performed without providing a protective layer that is expensive to protect the printing surface that has been required for conventional display sheets. An object of the present invention is to provide a display sheet in which the visibility of the display / decoration due to wear of the display is reduced.

  A first aspect of the present invention is a display sheet including a base material whose back surface is bonded to a floor surface or a wall surface, and an ink layer formed on the surface of the base material. The arithmetic mean height (Ra) of the roughness curve when the cut-off value λs of JIS-B-0601 standard is 0.25 mm and λc is 8 mm is 10-50 μm. And the average length (RSm) of the roughness curve element is in the range of 500 to 2000 μm, and the ink layer is formed by the fine ink covering the convex portion and penetrating into the concave portion, on the back surface of the substrate Further, an adhesive layer that adheres to a floor surface or a wall surface is formed.

  A second aspect of the present invention is an invention based on the first aspect, wherein the base material is a core material, and the surface side synthetic resin formed by a coating method using a synthetic resin composition on the surface of the core material It consists of two layers comprising the composition layer or three layers in which the back side synthetic resin composition layer is further formed on the back side of the core material, the core material has irregularities on the surface, and the surface of the surface side synthetic resin composition layer is The protrusions and recesses formed on the surface of the base material were formed on the surface of the surface-side synthetic resin composition layer due to the unevenness on the surface of the core material. It is a convex part and a recessed part, It is characterized by the above-mentioned.

  A third aspect of the present invention is an invention based on the second aspect, and is characterized in that the core material further comprises a woven fabric or a non-woven fabric having irregularities on the surface.

  A fourth aspect of the present invention is an invention based on the second aspect, wherein the core material further comprises a synthetic resin film or sheet having irregularities on the surface, and the irregularities on the surface of the core material are the inorganic substances contained in the core material. It is the unevenness | corrugation formed due to it, It is characterized by the above-mentioned.

  A fifth aspect of the present invention is an invention based on the second aspect, wherein the core material further comprises a synthetic resin film or sheet having irregularities on the surface, and the irregularities on the core material surface are formed by surface processing of the core material. It is characterized by being uneven.

  6th viewpoint of this invention is invention based on 1st viewpoint, Comprising: The surface side synthetic resin by which the base material was further formed by the apply | coating method using the synthetic resin composition on the surface of the core material and the core material It consists of two layers comprising the composition layer or three layers in which the back side synthetic resin composition layer is further formed on the back side of the core material, the surface side synthetic resin composition layer containing an inorganic substance, and the surface side synthetic resin composition layer The surface of the surface is formed into an uneven surface consisting of protrusions and recesses due to the inorganic material, and the protrusions and recesses formed on the surface of the substrate are the protrusions formed on the surface of the surface side synthetic resin composition layer. It is a part and a recessed part, It is characterized by the above-mentioned.

  A seventh aspect of the present invention is the invention based on the first aspect, wherein the base material is a core material, and the surface side synthetic resin formed by a coating method using a synthetic resin composition on the surface of the core material It consists of two layers comprising the composition layer or three layers in which the back side synthetic resin composition layer is further formed on the back side of the core, and the surface of the surface side synthetic resin composition layer is applied when the synthetic resin composition is applied. Due to the coating method, the protrusions and recesses formed on the uneven surface consisting of protrusions and recesses and formed on the surface of the substrate are the protrusions and recesses formed on the surface of the surface side synthetic resin composition layer. It is characterized by being.

  The eighth aspect of the present invention is the invention based on the first aspect, wherein the base material is a core material, and the surface side synthetic resin formed by a coating method using a synthetic resin composition on the surface of the core material It consists of two layers comprising the composition layer or three layers in which the back side synthetic resin composition layer is further formed on the back side of the core material, and after forming the surface side synthetic resin composition layer, the surface side synthetic resin composition layer By surface processing, the surface of the surface-side synthetic resin composition layer is formed into an uneven surface consisting of protrusions and recesses, and the protrusions and recesses formed on the surface of the substrate are formed on the surface of the surface-side synthetic resin composition layer. It is the formed convex part and recessed part, It is characterized by the above-mentioned.

  A ninth aspect of the present invention is the invention based on the first aspect, and is characterized in that the substrate further comprises a single synthetic resin composition layer.

  A tenth aspect of the present invention is an invention based on the first to ninth aspects, and is characterized in that the ink layer is an outermost layer.

  An eleventh aspect of the present invention is an invention based on the first to ninth aspects, wherein an antifouling coating layer is further formed on the surface of the ink layer.

  A twelfth aspect of the present invention is an invention based on the first to ninth aspects, wherein the antifouling coating layer is formed on the surface of the substrate, and the ink layer is partially formed on the surface of the antifouling coating layer. It is characterized by that.

  A thirteenth aspect of the present invention is an invention based on the fifth or eighth aspect, wherein the surface processing is a mechanical embossing method.

  14th viewpoint of this invention is invention based on 2nd thru | or 13th viewpoint, Comprising: The surface side synthetic resin composition layer, the back side synthetic resin composition layer, or the single synthetic resin composition layer is versatile. It consists of one or more selected from the group consisting of synthetic resins, thermosetting resins, engineering plastic resins, super engineering plastic resins and other resins, and the other resins are cellulose resins, styrene block copolymer resins, ionomers or It is a rubber / elastomer.

  A fifteenth aspect of the present invention is an invention based on the second to eighth aspects, wherein the thickness of the front surface side synthetic resin composition layer or the back surface side synthetic resin composition layer is 10 to 200 μm. Features.

  A sixteenth aspect of the present invention is the invention based on the first to fifteenth aspects, wherein the ink layer is formed by any of ink jet printing, silk screen printing, offset printing, gravure printing, letterpress printing, or lithographic printing. It is characterized by that.

  A seventeenth aspect of the present invention is an invention based on the first to sixteenth aspects, further comprising a release paper laminated on the surface of the adhesive layer, the release paper being creped and in accordance with JIS-P-8113. It is characterized by comprising a crepe paper having a tensile elongation at break measured in the range of 5 to 50%.

  In the display sheet according to the first aspect of the present invention, the surface of the base material is formed on an uneven surface composed of convex portions and concave portions, and the surface of the base material has a cut-off value λs of 0.25 mm according to JIS-B-0601 standard and The arithmetic average height (Ra) of the roughness curve when λc is 8 mm is in the range of 10 to 50 μm, and the average length (RSm) of the roughness curve element is in the range of 500 to 2000 μm. The fine ink covers the convex part and penetrates into the concave part. As a result, when the display sheet is affixed to the floor surface and the ink layer is worn by pedestrian traffic, the convex portions of the base material are exposed. And since the material with comparatively strong mechanical strength is used, the convex part of a base material is hard to wear compared with an ink layer. For this reason, the ink layer remaining in the concave portion of the base material is protected by the convex portion adjacent to the concave portion without providing a protective layer or the like formed on the printed surface to prevent abrasion of the ink layer, Even when used on an outdoor floor surface where frequent walking is performed, it is possible to prevent display and decoration visibility due to wear on the printed surface from being deteriorated.

  Further, a release paper in which the back surface of the base material is also formed on a concavo-convex surface composed of convex portions and concave portions, an adhesive layer that adheres to the floor surface or wall surface is formed on the back surface of the base material, and is laminated on the surface of the adhesive layer If the release paper is creped and its tensile breaking elongation is in the range of 5 to 50%, when the sheet is wound with the release paper outside for storage, the release paper is stretched. When the sheet is unwound, the release paper with tension applied in the extension direction stretches with the pressure-sensitive adhesive layer, causing a gap between the pressure-sensitive adhesive layer and the release paper. I won't let you. For this reason, a situation where local peeling occurs between the release paper and the pressure-sensitive adhesive layer when unwinding is avoided, and a streak-like cavity extending in the width direction of the release paper based on the peeling (hereinafter referred to as the release paper) "Tunnel") can be prevented from occurring on the release paper.

It is sectional drawing which shows the structure of the display sheet of this invention. It is sectional drawing which shows the structure of the display sheet in the 1st Embodiment of this invention. It is sectional drawing which shows the structure of the display sheet in the 2nd-4th embodiment of this invention. It is sectional drawing which shows the display sheet of the state which the ink layer was abraded and the convex part of the synthetic resin layer appeared.

Next, an embodiment for carrying out the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 4, the display sheet 20 of the present invention includes a base material 10 whose back surface is bonded to a floor surface or a wall surface 17, and an ink layer 13 formed on the surface of the base material 10. .

  The surface of the base material 10 is formed in the uneven surface which consists of the convex part 10a and the recessed part 10b. The convex portion 10a and the concave portion 10b have a function of suppressing a decrease in the visibility of the display and decoration in the ink layer 13 to be described later by suppressing the contact area with the shoe sole of the pedestrian, that is, the wear area, to be extremely small. Yes. In addition, the convex part 10a and the recessed part 10b in this invention do not need to arrange | position regularly but may be irregular.

  In the first preferred embodiment of the present invention, as shown in FIG. 2, the base material 10 is a core material 11 and the surface side of the core material 11 formed by a coating method using a synthetic resin composition. 2 layers composed of the synthetic resin composition layer 12 or 3 layers in which the back surface side synthetic resin composition layer 14 is further formed on the back surface of the core material 11, the core material 11 has irregularities on the surface, and the surface side synthetic resin The surface of the composition layer 12 is formed on a concavo-convex surface composed of convex portions 10a and concave portions 10b due to the irregularities on the surface of the core material, and the convex portions 10a and concave portions formed on the surface of the substrate 10 shown in FIG. 10b is the convex part 12a and the recessed part 12b which were formed in the surface of the surface side synthetic resin composition layer 12 shown in FIG.

  Examples of the member used as the core material include a woven fabric or a non-woven fabric selected from glass fiber, cellulose fiber, rayon fiber, polyamide fiber, polyvinyl alcohol fiber, polyester fiber, acrylic fiber, polyolefin fiber or polyurethane fiber. These woven fabrics or non-woven fabrics are suitable in the present invention because irregularities can be easily obtained without applying a special surface treatment, and a desired irregular surface can be easily imparted to the surface side synthetic resin composition layer. The woven fabric has higher mechanical strength and excellent wear resistance than other members. Note that the woven fabric includes a canvas, and in this specification, the sailcloth is defined as a canvas weave woven fabric. On the other hand, non-woven fabrics are made in a cloth form by fusing or bonding without weaving the fibers, so there are fewer manufacturing steps than woven fabrics, etc., and in terms of productivity and production cost, etc., and thickness adjustment Is easy. Further, in the case of a woven fabric, the size of the surface irregularities and the like almost depends on the stitches appearing on the surface, but in the case of the nonwoven fabric, since there are no stitches, the size of the surface irregularities can be easily adjusted. Therefore, a desired uneven surface can be easily given to the surface of the surface side synthetic resin composition layer or the back surface side synthetic resin composition layer.

  Examples of the member as a suitable core material other than the woven fabric and the non-woven fabric include a synthetic resin film or sheet on which irregularities are formed by performing surface processing. Suitable synthetic resin films or sheets include synthetic resin films or sheets such as general-purpose synthetic resins, thermosetting resins, engineering plastic resins, or super engineering plastic resins. General-purpose synthetic resins include polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyvinyl acetate, ethylene-vinyl acetate, ethylene-ethyl acrylate, polyvinyl alcohol, fluororesin, acrylonitrile butadiene styrene, acrylo styrene, Examples include polymethyl methacrylate, polyacrylonitrile, polyolefin, or a mixture thereof. Particularly preferred are polytetrafluoroethylene for fluororesins, polymethyl methacrylate for acrylic resins, and polybutene, polybutadiene or polymethylpentane for polyolefins. Examples of the thermosetting resin include phenol resin, epoxy resin, melamine resin, urea resin, unsaturated polyester resin, alkyd resin, polyurethane resin, thermosetting polyimide, silicone resin, diallyl phthalate resin, or a mixture thereof. Engineering plastic resins include polyamides, polyacetals, polycarbonates, modified polyphenylene ethers, thermoplastic polyester resins, cyclic polyolefins, or mixtures thereof. Nylon is particularly preferable for polyamide, and polybutylene terephthalate or polyethylene terephthalate is particularly preferable for thermoplastic polyester resin. Examples of the super engineering plastic resin include polyphenylene sulfide, polysulfone, polyether sulfone, amorphous polyarylate, liquid crystal polymer, polyether ketones, thermoplastic polyimide, polyamideimide, polyetherimide, or a mixture thereof. Of the polyether ketones, polyether ether ketone is particularly preferred. Examples of the resin component other than the above include cellulose resins such as cellulose acetate, nitrocellulose, acetylcellulose, and carboxymethylcellulose, styrene block copolymer resins, ionomers, rubber / elastomers, and mixtures thereof.

  Surface treatment methods for forming irregularities on the surface of the core synthetic resin film or sheet include mechanical embossing methods such as embossing and hot stamping using embossing plates and embossing rolls, and chemical removal cutting such as chemical etching. And methods such as a physical removal cutting method, a corona plasma treatment method, and the like, such as a sand blasting method and a roll blasting method. The display sheet using the synthetic resin film or sheet subjected to the surface processing is superior in terms of fine workability and productivity as compared with a display sheet using another member as a core material.

  Moreover, the synthetic resin film or sheet | seat which made the material contain an inorganic substance in a manufacturing process, and the unevenness | corrugation resulting from this inorganic substance was formed in the surface can be used without performing surface processing. That is, this synthetic resin film or sheet contains an inorganic substance as a material of the film or sheet, and this inorganic substance gives a desired uneven surface to the surface of the synthetic resin film or sheet. For inorganic materials, glass beads, calcium carbonate, talc, alumina, silica, magnesium carbonate, magnesium oxide, zinc oxide, titanium oxide, hydrotalcite, snaketite, boehmite due to superior durability and production cost. It is preferable to use one or more inorganic fillers selected from the group consisting of bentonite, sodium silicate, calcium silicate, calcium sulfate and the like. The shape of these inorganic substances is preferably in the form of needles or plates, in addition to being spherical. The average particle size of the inorganic material is preferably 1 to 500 μm for reasons such as acceptability of printing ink and excellent wear resistance due to walking. The method for producing such a synthetic resin film or sheet is not particularly limited, and can be produced by ordinary molding means. Specifically, first, the components such as the inorganic filler and the synthetic resin are uniformly distributed using a melt kneader or a mixing device such as a general single or twin screw extruder, roll, Banbury mixer or kneader. Mix to disperse. Next, the obtained mixture is formed into a film or a sheet using a calendar molding machine, and is cut into a desired width. Such a synthetic resin film or sheet having irregularities due to inorganic substances formed on the surface is excellent in terms of acceptability of printing ink and wear resistance due to walking. Moreover, it is preferable that the thickness of the core material in 1st Embodiment is in the range of 50-700 micrometers in thickness including the convex part of the core material surface.

  The surface side synthetic resin composition layer 12 is formed on the surface of the core material 11 by a coating method using the synthetic resin composition. Examples of the resin component contained in the synthetic resin composition include general-purpose synthetic resins, thermosetting resins, engineering plastic resins, and super engineering plastic resins. Specific general-purpose synthetic resins, thermosetting resins, engineering plastic resins, or super engineering plastic resins include the same types as described above. In addition to the resin component, a plasticizer, a filler, a lubricant, a pigment, an ultraviolet absorber, a heat stabilizer, an antistatic agent, or the like is added to the synthetic resin composition used for forming the surface-side synthetic resin composition layer. A synthetic resin composition can be prepared by the above-described general mixing method using these components. In the first embodiment, the method for applying the synthetic resin composition is not particularly limited, and examples thereof include a comma coating method, a doctor knife coating method, a reverse roll coating method, a gravure coating method, and a bar coating method. Among these, a gravure coating method or a screen coating method which is a method suitable for application of a coating solution is particularly preferable. The thickness of the surface side synthetic resin composition layer is preferably in the range of 10 to 200 μm.

  In 1st Embodiment, the core material to be used has an unevenness | corrugation on the surface, and the uneven surface which consists of the convex part and concave part of the surface of the surface side synthetic resin composition layer originates in the unevenness | corrugation which this core material surface has. Therefore, it is possible to form a desired uneven surface without requiring a special coating method and without subjecting the surface side synthetic resin composition layer to surface treatment. In addition, the back surface side synthetic resin composition layer 14 can be formed with the same composition and method as the said surface side synthetic resin composition layer 12 in this Embodiment. The thickness of the back side synthetic resin composition layer is preferably in the range of 10 to 200 μm.

  In the second preferred embodiment of the present invention, as shown in FIG. 3, the base material 10 is a core material 11, and the surface side formed by a coating method using a synthetic resin composition on the surface of the core material 11. 2 layers composed of the synthetic resin composition layer 12 or 3 layers in which the back surface side synthetic resin composition layer 14 is further formed on the back surface of the core material 11, the surface side synthetic resin composition layer 12 containing an inorganic substance, The surface of the side synthetic resin composition layer 12 is formed on a concavo-convex surface composed of a convex portion 12a and a concave portion 12b due to an inorganic substance, and the convex portion 10a and the concave portion 10b formed on the surface of the substrate 10 shown in FIG. These are the convex part 12a and the recessed part 12b which were formed in the surface of the surface side synthetic resin composition layer 12 shown in FIG.

  The member used as the core material is not particularly limited, but it is preferable to use a synthetic resin film or sheet for reasons such as excellent ease of molding and production cost. Suitable synthetic resin films or sheets include synthetic resin films such as general-purpose synthetic resins, thermosetting resins, engineering plastic resins, and super engineering plastic resins. General-purpose synthetic resins include polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyvinyl acetate, ethylene-vinyl acetate, ethylene-ethyl acrylate, polyvinyl alcohol, fluororesin, acrylonitrile butadiene styrene, acrylo styrene, Examples include polymethyl methacrylate, polyacrylonitrile, and polyolefin. Particularly preferred are polytetrafluoroethylene for fluororesins, polymethyl methacrylate for acrylic resins, and polybutene, polybutadiene or polymethylpentane for polyolefins. Examples of the thermosetting resin include phenol resin, epoxy resin, melamine resin, urea resin, unsaturated polyester resin, alkyd resin, polyurethane resin, thermosetting polyimide, silicone resin, or diallyl phthalate resin. Examples of engineering plastic resins include polyamide, polyacetal, polycarbonate, modified polyphenylene ether, thermoplastic polyester resin, and cyclic polyolefin. Nylon is particularly preferable for polyamide, and polybutylene terephthalate or polyethylene terephthalate is particularly preferable for thermoplastic polyester resin. Examples of the super engineering plastic resin include polyphenylene sulfide, polysulfone, polyether sulfone, amorphous polyarylate, liquid crystal polymer, polyether ketones, thermoplastic polyimide, polyamideimide, and polyetherimide. Of the polyether ketones, polyether ether ketone is particularly preferred. Examples of the resin component other than the above include cellulose resins such as cellulose acetate, nitrocellulose, acetyl cellulose, and carboxymethyl cellulose, styrene block copolymer resins, ionomers, rubbers and elastomers. The core material used in the second embodiment is preferably flat because the desired uneven surface is formed on the surface of the surface-side synthetic resin composition layer in the subsequent step. The thickness of the core material is preferably in the range of 50 to 300 μm.

  The surface side synthetic resin composition layer 12 is formed on the surface of the core material 11 by a coating method using the synthetic resin composition. Examples of the resin component contained in the synthetic resin composition include general-purpose synthetic resins, thermosetting resins, engineering plastic resins, and super engineering plastic resins. Specific general-purpose synthetic resins, thermosetting resins, engineering plastic resins or super engineering plastic resins include the same types as described above. In addition to the above resin components, a plasticizer, a filler, a lubricant, a pigment, an ultraviolet absorber, a heat stabilizer, an antistatic agent, or the like is added to the synthetic resin composition. A synthetic resin composition can be prepared by the above-described general mixing method using these components. Furthermore, in this 2nd Embodiment, the inorganic substance for providing a desired uneven | corrugated surface to the surface of the surface side synthetic resin composition layer is added to the synthetic resin composition prepared by the above-mentioned method. Thus, by adding an inorganic substance to the synthetic resin composition and including the inorganic substance in the surface-side synthetic resin composition layer to be formed, the surface of the surface-side synthetic resin composition layer 12 is caused by this inorganic substance. It can be formed on a concavo-convex surface composed of convex portions 12a and concave portions 12b. For inorganic materials, glass beads, calcium carbonate, talc, alumina, silica, magnesium carbonate, magnesium oxide, zinc oxide, titanium oxide, hydrotalcite, snaketite, boehmite due to superior durability and production cost. It is preferable to use one or more inorganic fillers selected from the group consisting of bentonite, sodium silicate, calcium silicate, calcium sulfate and the like. The shape of these inorganic substances is preferably in the form of needles or plates, in addition to being spherical. The average particle size of the inorganic material is preferably 1 to 500 μm for reasons such as acceptability of printing ink and excellent wear resistance due to walking. In the second embodiment, the method for applying the synthetic resin composition is not particularly limited, and examples thereof include a comma coating method, a doctor knife coating method, a reverse roll coating method, a gravure coating method, and a bar coating method. Of these, a gravure coating method or a screen coating method, which is a method suitable for application of a coating solution, is particularly preferable. The thickness of the surface side synthetic resin composition layer is preferably in the range of 50 to 700 μm in thickness including the convex portions.

  In the second embodiment, the surface-side synthetic resin composition layer 12 is formed with an uneven surface composed of convex and concave portions on the surface-side synthetic resin composition layer 12 due to the inorganic material contained in the surface-side synthetic resin composition layer. The required uneven surface is not required, and the conditions such as the material of the core material that can be used are not greatly limited, and the core material or the surface side synthetic resin composition layer is not subjected to surface processing. Can be formed. Moreover, it is excellent in terms of production cost. In addition, the back surface side synthetic resin composition layer 14 can be formed with the same composition and method as the said surface side synthetic resin composition layer 12 in this Embodiment. The thickness of the back side synthetic resin composition layer is preferably in the range of 50 to 700 μm in thickness including the convex portions.

  In the third preferred embodiment of the present invention, as shown in FIG. 3, the base material 10 is a core material 11, and the surface side formed by a coating method using a synthetic resin composition on the surface of the core material 11. The synthetic resin composition layer 12 is composed of two layers or the back surface of the core material 11 and the back surface side synthetic resin composition layer 14 is further formed on the back surface. The surface of the front surface side synthetic resin composition layer 12 is the synthetic resin composition. The protrusion 10a and the recess 10b formed on the surface of the base material 10 shown in FIG. It is the convex part 12a and the recessed part 12b which were formed in the surface of the surface side synthetic resin composition layer 12 shown in FIG.

  Although the member used as a core material is not specifically limited, The same thing as the synthetic resin film or sheet | seat used in 2nd Embodiment is preferable. Moreover, it is preferable that the core material used in this 3rd Embodiment is flat from the reason for forming a desired uneven surface in the surface of the surface side synthetic resin composition layer in a post process. The thickness of the core material is preferably in the range of 50 to 500 μm.

  The surface side synthetic resin composition layer 12 is formed on the surface of the core material 11 by a coating method using the synthetic resin composition. Examples of the resin component contained in the synthetic resin composition include general-purpose synthetic resins, thermosetting resins, engineering plastic resins, and super engineering plastic resins. Specific general-purpose synthetic resins, thermosetting resins, engineering plastic resins, or super engineering plastic resins include the same types as described above. In addition to the above resin components, a plasticizer, a filler, a lubricant, a pigment, an ultraviolet absorber, a heat stabilizer, an antistatic agent, or the like is added to the synthetic resin composition. A synthetic resin composition can be prepared by the above-described general mixing method using these components.

  In this 3rd Embodiment, it is preferable to perform the coating method at the time of apply | coating the synthetic resin composition prepared above by the spray coat method or the roll coat method. This is because in the case of the spray coating method or the roll coating method, a desired uneven surface is easily formed on the surface of the surface side synthetic resin composition layer when the synthetic resin composition is applied to the core material. When using the spray coating method, by adjusting the concentration of each component of the synthetic resin composition to be applied and by adjusting the diameter of the spray nozzle, a desired uneven surface is formed on the surface of the surface-side synthetic resin composition layer. Can be formed. On the other hand, when the roll coating method is used, the surface of the surface-side synthetic resin composition layer is adjusted by adjusting the concentration and viscosity of each component of the synthetic resin composition to be applied, the roll rotation speed, and the clearance between rolls. A desired uneven surface can be formed. The thickness of the surface side synthetic resin composition layer is preferably in the range of 10 to 200 μm in thickness including the convex portions.

  In the third embodiment, the surface of the surface-side synthetic resin composition layer 12 is formed on a desired uneven surface due to the conditions when applying the synthetic resin composition, that is, the application method. Conditions such as the material of the core material are not significantly limited, and a desired uneven surface can be formed without special surface processing or the like on the core material or the surface side synthetic resin composition layer. In addition, the back surface side synthetic resin composition layer 14 can be formed with the same composition and method as the said surface side synthetic resin composition layer 12 in this Embodiment. The thickness of the back side synthetic resin composition layer is preferably in the range of 10 to 200 μm in thickness including the convex portions.

  In the fourth preferred embodiment of the present invention, as shown in FIG. 3, the base material 10 is a core material 11, and the surface side formed by a coating method using a synthetic resin composition on the surface of the core material 11. After forming the surface side synthetic resin composition layer 12, the two layers comprising the synthetic resin composition layer 12 or the three layers in which the back surface side synthetic resin composition layer 14 is further formed on the back surface of the core material 11 are formed. By the surface processing of the synthetic resin composition layer 12, the surface of the surface side synthetic resin composition layer is formed into an uneven surface composed of convex portions and concave portions, and the convex portions 10a formed on the surface of the substrate 10 shown in FIG. The recessed part 10b is the convex part 12a and the recessed part 12b which were formed in the surface of the surface side synthetic resin composition layer 12 shown in FIG.

  The member used as the core material 11 is not particularly limited, but is preferably the same as the synthetic resin film or sheet used in the second embodiment. Moreover, it is preferable that the core material used in this 4th Embodiment is flat from the reason for forming a desired uneven surface in the surface of the surface side synthetic resin composition layer in a post process. The thickness of the core material is preferably in the range of 50 to 500 μm.

  The surface side synthetic resin composition layer 12 is formed on the surface of the core material 11 by a coating method using the synthetic resin composition. Examples of the resin component contained in the synthetic resin composition include general-purpose synthetic resins, thermosetting resins, engineering plastic resins, and super engineering plastic resins. Specific general-purpose synthetic resins, thermosetting resins, engineering plastic resins, or super engineering plastic resins include the same types as described above. In addition to the above resin components, a plasticizer, a filler, a lubricant, a pigment, an ultraviolet absorber, a heat stabilizer, an antistatic agent, or the like is added to the synthetic resin composition. A synthetic resin composition can be prepared by the above-described general mixing method using these components. In the fourth embodiment, the method for applying the synthetic resin composition is not particularly limited, and examples thereof include a comma coating method, a doctor knife coating method, a reverse roll coating method, a gravure coating method, and a bar coating method. Among these, a gravure coating method or a screen coating method which is a method suitable for application of a coating solution is particularly preferable.

  As a surface processing method for forming a desired uneven surface on the surface of the formed surface side synthetic resin composition layer, a mechanical embossing method such as embossing / hot stamping using an embossing plate or an embossing roll, chemical etching, etc. For example, a chemical removal cutting method such as a physical removal method such as sand blasting or roll blasting or a corona plasma treatment method may be used. Among these, the mechanical embossing method or the physical removal cutting method is particularly preferable for reasons such as excellent fine workability and productivity. The thickness of the surface side synthetic resin composition layer is preferably in the range of 10 to 200 μm in thickness including the convex portions.

  In the fourth embodiment, the surface-side synthetic resin composition layer 12 is formed on a desired uneven surface by surface processing of the surface-side synthetic resin composition layer 12, so that a special coating method is not required. Conditions such as the material of the core material that can be used are not significantly limited, and a desired uneven surface can be formed without adding an inorganic substance to the core material or performing surface treatment. In particular, in the case of a mechanical embossing method or a physical removal cutting method, there is an advantage that a desired surface uneven structure can be arbitrarily formed. In addition, the back surface side synthetic resin composition layer 14 can be formed with the same composition and method as the said surface side synthetic resin composition layer 12 in this Embodiment. The thickness of the back side synthetic resin composition layer is preferably in the range of 10 to 200 μm in thickness including the convex portions.

  In 5th Embodiment, as shown in FIG. 1, the base material 10 consists of a single synthetic resin composition layer. The single synthetic resin composition layer is not particularly limited, but can be formed by the same material and method as the synthetic resin film or sheet used for the core material 11 in the first embodiment.

  The concavo-convex surface composed of the convex portions 10a and the concave portions 10b on the surface of the substrate 10 can be formed by surface processing of the synthetic resin composition layer. Examples of the surface processing include the mechanical embossing method, the chemical removal cutting method, the physical removal cutting method, or the corona plasma treatment method described above. Moreover, in the manufacturing process of this synthetic resin composition layer, an inorganic substance can be contained in a material, and it can also form in a desired uneven surface resulting from this inorganic substance. As the inorganic material, the same material as that added to the core material 11 in the first embodiment described above can be used. The thickness of the base material used in the fifth embodiment is preferably in the range of 300 to 750 μm including the convex portion. In 5th Embodiment, since the base material 10 consists of a single synthetic resin composition layer, compared with the 1st-4th embodiment in which a base material consists of 2 or 3 layers, abrasion resistance and durability. However, it is excellent in terms of simplification of the production process and production cost.

  In the first to fifth embodiments, the surface of the base material 10 formed on the concave and convex surface composed of the convex portion 10a and the concave portion 10b has two parameters defined in JIS-B-0601 (2001), that is, It is defined by the arithmetic average roughness Ra of the roughness curve and the average length RSm of the roughness curve elements. Here, Ra gives the degree of protrusion of the convex part 10a and the degree of curvature of the concave part 10b, and RSm gives the distribution frequency of the convex part 10a and the concave part 10b.

  The surface shape of the base material in the display sheet of the present invention is 0.25 mm and 8 mm measured on the surface of the base material 10 in accordance with JIS-B-0633 (2001) and JIS-B-0601 (2001), respectively. The arithmetic average height Ra of the roughness curve at the cutoff values λs and λc is in the range of 10 to 50 μm. If Ra is less than 10 μm, the surface is too smooth and the wear area becomes large, and the visibility of display and decoration cannot be maintained. On the other hand, when Ra exceeds 50 μm, the printed surface is too rough, and the graphic properties of display / decoration are remarkably inferior, and the walking is uncomfortable. Among these, the arithmetic average height Ra of the roughness curve is preferably in the range of 14 to 40 μm, and particularly preferably in the range of 14 to 20 μm.

  Moreover, the surface shape of the base material 10 in the present invention is 0.25 mm and 8 mm measured on the surface of the base material 10 in accordance with JIS-B-0633 (2001) and JIS-B-0601 (2001), respectively. The average length RSm of the roughness curve elements at the cutoff values λs and λc is in the range of 500 to 2000 μm. If RSm is less than 500 μm, the number of the convex portions 10a and the concave portions 10b is too large, and the total wear area becomes large, and the effect of the present invention is not exhibited. When RSm exceeds 2000 μm, even if the number of convex portions 10a and concave portions 10b is too small to satisfy the arithmetic average height Ra, it does not contribute to the effect of the present invention. Furthermore, short wavelength components having a cutoff value λs of less than 0.25 mm do not contribute to the effects of the present invention. On the other hand, a long wavelength component having a cutoff value λc exceeding 8 mm does not contribute to the effect of the present invention. Among these, the average length RSm of the roughness curve element is preferably in the range of 740 to 1200 μm.

  On the other hand, as shown in FIG. 1, the back surface of the base material 10 is also formed on a concavo-convex surface including a convex portion 10 c and a concave portion 10 d. In the first to fourth embodiments, as shown in FIG. 2, the surface of the back surface side synthetic resin composition layer 14 is formed on a concavo-convex surface composed of convex portions 14 a and concave portions 14 b, and the convex portions 14 a and concave portions 14 b. Corresponds to the convex portion 10c and the concave portion 10d shown in FIG. The convex portion 10c and the concave portion 10d formed on the back surface of the base material 10 are formed by the same method as the method for forming the convex portion 10a and the concave portion 10b on the surface of the base material 10 in the first to fifth embodiments. Can do.

  A pressure-sensitive adhesive layer 15 is formed on the back surface of the base material 10 formed on the concave-convex surface including the convex portions 10 c and the concave portions 10 d, and a release paper 16 is further laminated on the surface of the pressure-sensitive adhesive layer 15. The pressure-sensitive adhesive layer 15 used in the present invention is not particularly limited as long as it has sufficient pressure-sensitive adhesiveness or adhesiveness for floor use, but is mainly composed of an acrylic resin or a synthetic rubber resin. It can be used, and is formed by coating itself on the back surface of the substrate 10. The thickness of the pressure-sensitive adhesive layer 15 needs to be 30 to 130 μm, and more preferably 70 to 100 μm. When the thickness of the pressure-sensitive adhesive layer 15 is less than 30 μm, it is difficult to obtain a desired adhesive force or it is difficult to maintain the adhesive force. When the thickness of the pressure-sensitive adhesive layer 15 exceeds 130 μm, it is disadvantageous in terms of cost.

  The release paper 16 is made of crepe paper that has been creped and has a tensile elongation at break of 5 to 50% as measured by JIS-P-8113. That is, the release paper 16 is subjected to creping, for example, on craft paper to be the core material 11, and the crepe paper obtained by the processing is subjected to general thermoplastic resin laminating and release agent coating. can get. In the lamination process of the thermoplastic resin, a heat-melted resin such as known polyethylene is extruded and laminated on one side of the crepe paper with an extruder. As the thermoplastic resin, known resins such as polyolefin resin can be used. For example, L-LDPE (linear low density polyethylene), MDPE (medium density polyethylene), HDPE (high density polyethylene), PP (polypropylene), etc. Resins are preferred. On the other hand, a release resin 16 made of crepe paper is obtained by applying silicone to the laminating surface of the crepe paper laminated with a thermoplastic resin.

  The thickness of the portion composed of the base material 10, the pressure-sensitive adhesive layer 15 formed on the back surface of the base material 10, and the release paper 16 laminated on the surface of the pressure-sensitive adhesive layer 15 is preferably 0.5-1. 5 mm, more preferably 0.7 to 1.0 mm. If this thickness exceeds 1.5 mm, for example, when the ink layer 13 is formed by ink jet printing, there is a possibility of exceeding the corresponding thickness of the ink jet printer. On the other hand, if the thickness is less than 0.5 mm, the substrate is thin and the strength is insufficient. The ink layer 13 formed on the surface of the substrate 10 is formed by the fine ink to be sprayed covering the convex portion 10a and penetrating into the concave portion 10b.

  In the display sheet 20 configured as described above, the ink layer 13 is wound and stored in a state before the ink layer 13 is formed, the winding is released from the stored state, and the ink layer 13 is formed on the surface of the base material 10. Is formed. In general, the sheet is wound with the release paper 16 facing outward, and when such a relatively thick sheet is wound with the release paper 16 facing outward, the release paper 16 has a large tension in the extension direction. In the display sheet 20 of the present invention, the crepe paper having a tensile elongation at break in the range of 5 to 50% is used as the release paper 16, so that the release sheet with tension applied in the extension direction is maintained. The pattern paper 16 is stretched together with the pressure-sensitive adhesive layer 15 and does not cause a deviation between the pressure-sensitive adhesive layer 15 and the release paper 16.

  The wound and stored sheet is unwound from that state to form the ink layer 13 on the surface of the base material 10, and the ink layer 13 is formed to obtain the display sheet 20 of the present invention. . Although formation in particular of ink layer 13 is not limited, printing methods, such as ink jet printing, silk screen printing, offset printing, gravure printing, letterpress printing, or lithographic printing, are mentioned. When the ink layer 13 is formed by ink jet printing, when the wound sheet is unwound, the release paper 16 in which the gap between the layers or the release paper 16 remains is removed from the pressure-sensitive adhesive layer. When such a thing occurs, it will interfere with inkjet printing. However, in the display sheet 20 of the present invention, crepe paper having a tensile elongation at break in the range of 5 to 50% is used as the release paper 16. Therefore, when the wound sheet is unwound, the release paper 16 becomes an adhesive layer. Thus, it is possible to avoid a situation in which a tunnel is generated in the release paper 16 due to contraction in the longitudinal direction together with 15.

  The display sheet 20 of the present invention on which the ink layer 13 is formed is then cut into a predetermined size or the like, and is used by being attached to a floor surface on which pedestrians come and go. This affixing to the floor surface is performed using an adhesive layer 15 that is exposed by peeling off the release paper 16, and the adhesive layer 15 is provided to facilitate the affixing operation to the floor surface. it can.

  The display sheet 20 of the present invention omits the protective layer formed on the printing surface that has been conventionally provided and uses the ink layer 13 as the outermost layer, so that the ink layer 13 can be protected from traffic of pedestrians. Instead, the ink layer 13 is worn by pedestrian traffic. However, since the display sheet 20 of the present invention has the convex portion 10a and the concave portion 10b on the surface of the base material 10 and the ink penetrates into the concave portion 10b of the base material 10, the ink layer 13 is passed by the pedestrian. As shown in FIG. 4, the convex part 10a of the base material 10 is exposed. And since the material with comparatively strong mechanical strength is used, the convex part 10a of the base material 10 is hard to be worn compared with the ink layer 13. For this reason, the ink layer 13 remaining in the concave portion 10b of the base material 10 is protected by the convex portion 10a adjacent to the concave portion 10b. It can prevent that the visibility of decoration falls. In addition, since the protective layer formed on the printing surface that has been provided in the past was made of a material that is relatively slippery, it slips and falls when a pedestrian passes when the surface is wet due to rain or the like. There was a risk of dripping. However, since the display sheet of the present invention has an ink layer as the outermost layer and is not provided with a protective layer made of a slippery material, such a danger can be avoided.

  In the display sheet 20 of the present invention, an antifouling coating layer may be further formed on the surface of the ink layer 13 in order to prevent the visibility from being deteriorated due to the stain of the ink layer 13. Further, when the ink layer 13 is partially formed on the surface of the base material 10, the ink layer 13 is used to prevent the non-printing surface on the surface of the base material 10 where the ink layer 13 is not formed from being stained. An antifouling coating layer may be further formed on the surface of the base material 10 before forming. In this case, an antifouling coating layer may be further formed on the surface of the partially formed ink layer. The material of the antifouling coating layer includes fluorine resin solvent-based or fluorine resin-based antifouling agents such as fluorine resin / acrylic resin solvent, ethylene-vinyl acetate copolymer resin emulsion, acrylic resin emulsion, or synthetic rubber latex. In addition to emulsion / latex antifouling agents such as sodium silicate or sodium silicate / acrylic resin mixed liquids such as sodium silicate (so-called water glass) antifouling agents, or inorganic nano-materials such as titanium dioxide or silicon dioxide Examples thereof include particulate antifouling agents. Examples of the coating method include a comma coating method, a doctor knife coating method, a reverse roll coating method, a gravure coating method, and a bar coating method, but a gravure coating method or screen coating which is a method suitable for coating a coating solution. The method is particularly preferred. The thickness of the antifouling coating layer is preferably in the range of 0.5 to 200 μm.

  Accordingly, when the display sheet 20 of the present invention is used by being attached to a floor surface on which pedestrians come and go, the display sheet on the printed surface is visually recognized compared with a conventional sheet having no protective layer. Even when compared with the conventional one having a protective layer on the printing surface, the maintenance of the display / decoration visibility on the printing surface is not significantly impaired. Therefore, since the display sheet 20 of the present invention does not need to be provided with a protective layer required for conventional floor use, it is useful for cost reduction and simplification of the manufacturing process, and is excellent in slip resistance.

Next, examples of the present invention will be described together with comparative examples.
<Example 1>
A sheet (name of product manufactured by Kuraray Co., Ltd.) on which a front surface and a back surface side synthetic resin composition layers 12 and 14 made of vinyl chloride are formed on a core material 11 made of a polyester resin fiber woven fabric which is a canvas. “Cremona”) was prepared as substrate 10. When the surface property of this sheet, that is, the substrate 10 was measured according to JIS-B-0601 (2001), Ra was 18.6 μm and RSm was 1165.2 μm.

On this sheet (Cremona), an elastic release paper 16 made of crepe paper having a thickness of 200 μm was used, and an adhesive layer having a thickness of 80 μm was formed by a transfer method. Thereby, the base material 10 formed of the core material 11 and the front and back side synthetic resin compositions 12 and 14 formed on the front and back surfaces of the core material 11 and the adhesive formed on the back surface side synthetic resin composition layer 14. A sheet having a total thickness of 820 μm composed of the agent layer 15 and the release paper 16 laminated on the surface of the pressure-sensitive adhesive layer 15 was obtained. In addition, the polyester resin fiber woven fabric which is the canvas used was an average thickness of 367 μm and a mass of 238 g / m ² . The polyester resin fiber woven fabric has a warp yarn thickness of 59 dtex and a yarn density of 46 / inch (18.1 yarns / cm), a weft yarn thickness of 59 dtex and a yarn density of 42 yarns / cm. Inch (16.5 pieces / cm).

  This sheet was printed with an ink jet printer (model name “Roland Pro 3” manufactured by Roland DG Co., Ltd.), and 10 arbitrary characters having a size of 30 × 30 mm were printed to obtain the display sheet of the present invention. This display sheet was referred to as Example 1.

<Comparative Example 1>
A sheet having a width of 100 mm and a thickness of 1120 μm in which the front and back side synthetic resin composition layers 12 and 14 were formed on the core material 11 of a polyester resin fiber woven fabric different from the twill weave was prepared as the base material 10. When the surface property of this sheet, that is, the substrate 10 was measured in accordance with JIS-B-0601 (2001), Ra was 120.6 μm and RSm was 2025 μm.

On this sheet, an elastic release paper 16 made of crepe paper having a thickness of 200 μm was used, and an adhesive layer having a thickness of 80 μm was formed by a transfer method. Thereby, the base material 10 formed of the core material 11 and the front and back side synthetic resin compositions 12 and 14 formed on the front and back surfaces of the core material 11 and the adhesive formed on the back surface side synthetic resin composition layer 14. A sheet having a total thickness of 1400 μm composed of the agent layer 15 and the release paper 16 laminated on the surface of the pressure-sensitive adhesive layer 15 was obtained. The twill polyester resin fiber woven fabric used had an average thickness of 630 μm and a mass of 350 g / m ² . The polyester resin fiber woven fabric has a warp yarn thickness of 83 dtex and a yarn density of 20 yarns / inch (7.9 yarns / cm), and a weft yarn thickness of 83 dtex and yarn density of 16 yarns / cm. The inch was 6.3 pieces / cm.

  In the same manner as in Example 1, this sheet was printed with an ink jet printer (model name “Roland Pro 3” manufactured by Roland DG Co., Ltd.) to print any 10 characters having a size of 30 × 30 mm to obtain a display sheet. This display sheet was referred to as Comparative Example 1.

<Evaluation test and evaluation>
Each display sheet in Example 1 and Comparative Example 1 was evaluated by visual evaluation of visibility after reciprocating in parallel 200 times with a # 400 paper file and shaving the surface. The visibility of the display / decoration on the printed surface is “good” if an arbitrary character of roughly 30 × 30 mm size can be read. ". The results are shown in Table 1 together with the surface shape values.

表１から明らかなように、実施例１の表示シートでは、上記試験方法において「良好」の評価が得られた。それに対して、比較例１の表示シートは、上記試験方法において「不可」の評価であった。これは、基材上に形成されたインク層は、その基材の表面を適度な凸部と凹部からなる凹凸面に形成することにより保護できることを意味し、その適度な凸部と凹部からなる凹凸面に形成された合成樹脂成形物層の表面は、ＪＩＳ−Ｂ−０６０１規格のカットオフ値λｓが０．２５ｍｍ及びλｃが８ｍｍにおける粗さ曲線の算術平均高さＲａであれば１０〜５０μｍの範囲内であり、かつ粗さ曲線要素の平均長さＲＳｍであれば５００〜２０００μｍの範囲内であることが判る。

As is clear from Table 1, the display sheet of Example 1 was evaluated as “good” in the test method. On the other hand, the display sheet of Comparative Example 1 was evaluated as “impossible” in the above test method. This means that the ink layer formed on the base material can be protected by forming the surface of the base material on a concavo-convex surface consisting of appropriate convex portions and concave portions, and consists of the appropriate convex portions and concave portions. The surface of the synthetic resin molding layer formed on the concavo-convex surface is 10 to 50 μm if the arithmetic mean height Ra of the roughness curve when the cutoff value λs of JIS-B-0601 standard is 0.25 mm and λc is 8 mm. And the average length RSm of the roughness curve element is found to be in the range of 500 to 2000 μm.

  It can be used as a display sheet that can be affixed to asphalt pavements, concrete or mortar paved floors, etc., as simple advertisements or guidance signs in places where pedestrians come and go outdoors.

DESCRIPTION OF SYMBOLS 10 Base material 10a Convex part 10b Concave part 13 Ink layer 15 Adhesive layer 16 Release paper 20 Display sheet

Claims (17)

In a display sheet comprising a base material (10) whose back surface is bonded to a floor surface or a wall surface (17), and an ink layer (13) formed on the surface of the base material (10),
The surface of the base material (10) is formed on a concavo-convex surface composed of convex portions (10a) and concave portions (10b),
The surface of the base material (10) has an arithmetic average height (Ra) of a roughness curve at a cutoff value λs of 0.25 mm and λc of 8 mm of JIS-B-0601 standard within a range of 10 to 50 μm, And the average length (RSm) of the roughness curve element is in the range of 500 to 2000 μm,
The ink layer (13) is formed by fine ink covering the convex portion (10a) and penetrating into the concave portion (10b),
A display sheet, wherein a pressure-sensitive adhesive layer (15) that adheres to the floor surface or the wall surface (17) is formed on the back surface of the substrate (10). A base material (10) is composed of a core material (11) and two layers comprising a surface side synthetic resin composition layer (12) formed by a coating method using a synthetic resin composition on the surface of the core material (11) or The back surface side synthetic resin composition layer (14) is further formed on the back surface of the core material (11).
The core material (11) has irregularities on the surface, and the surface of the surface side synthetic resin composition layer (12) is caused by the irregularities on the surface of the core material (11), resulting in a convex portion (12a) and a concave portion. Formed on an uneven surface consisting of (12b),
Convex portions (10a) and concave portions (10b) formed on the surface of the substrate (10) are convex portions (12a) and concave portions (12b) formed on the surface of the surface side synthetic resin composition layer (12). The display sheet according to claim 1.   The display sheet according to claim 2, wherein the core material (11) is made of a woven or non-woven fabric having irregularities on the surface.   The core material (11) is made of a synthetic resin film or sheet having irregularities on the surface, and the irregularities on the surface of the core material (11) are irregularities formed due to an inorganic substance contained in the core material (11). 2. The display sheet according to 2.   The display according to claim 2, wherein the core material (11) is made of a synthetic resin film or sheet having irregularities on the surface, and the irregularities on the surface of the core material (11) are irregularities formed by surface processing of the core material (11). Sheet. A base material (10) is composed of a core material (11) and two layers comprising a surface side synthetic resin composition layer (12) formed by a coating method using a synthetic resin composition on the surface of the core material (11) or The back surface side synthetic resin composition layer (14) is further formed on the back surface of the core material (11).
The surface-side synthetic resin composition layer (12) contains an inorganic substance, and the surface of the surface-side synthetic resin composition layer (12) is caused by the inorganic substance from a convex part (12a) and a concave part (12b). Formed on the uneven surface,
Convex portions (10a) and concave portions (10b) formed on the surface of the substrate (10) are convex portions (12a) and concave portions (12b) formed on the surface of the surface side synthetic resin composition layer (12). The display sheet according to claim 1. A base material (10) is composed of a core material (11) and two layers comprising a surface side synthetic resin composition layer (12) formed by a coating method using a synthetic resin composition on the surface of the core material (11) or The back surface side synthetic resin composition layer (14) is further formed on the back surface of the core material (11).
The surface of the surface-side synthetic resin composition layer (12) is formed on a concavo-convex surface composed of convex portions (12a) and concave portions (12b) due to the coating method when applying the synthetic resin composition,
Convex portions (10a) and concave portions (10b) formed on the surface of the substrate (10) are convex portions (12a) and concave portions (12b) formed on the surface of the surface side synthetic resin composition layer (12). The display sheet according to claim 1. A base material (10) is composed of a core material (11) and two layers comprising a surface side synthetic resin composition layer (12) formed by a coating method using a synthetic resin composition on the surface of the core material (11) or The back surface side synthetic resin composition layer (14) is further formed on the back surface of the core material (11).
After forming the surface-side synthetic resin composition layer (12), the surface of the surface-side synthetic resin composition layer (12) is convex (12a) by surface processing of the surface-side synthetic resin composition layer (12). ) And recesses (12b)
Convex portions (10a) and concave portions (10b) formed on the surface of the substrate (10) are convex portions (12a) and concave portions (12b) formed on the surface of the surface side synthetic resin composition layer (12). The display sheet according to claim 1.   The display sheet according to claim 1, wherein the substrate (10) comprises a single synthetic resin composition layer.   The display sheet according to any one of claims 1 to 9, wherein the ink layer (13) is an outermost layer.   The display sheet according to any one of claims 1 to 9, wherein an antifouling coating layer is further formed on the surface of the ink layer (13).   The display sheet according to any one of claims 1 to 9, wherein an antifouling coating layer is formed on a surface of the substrate (10), and an ink layer (13) is partially formed on the surface of the antifouling coating layer. .   The display sheet according to claim 5 or 8, wherein the surface processing is a mechanical embossing method. The front side synthetic resin composition layer (12), the back side synthetic resin composition layer (14) or a single synthetic resin composition layer is a general-purpose synthetic resin, thermosetting resin, engineering plastic resin, super engineering plastic resin and other resins. Consisting of one or more selected from the group consisting of:
The display sheet according to any one of claims 2 to 13, wherein the other resin is a cellulose resin, a styrene block copolymer resin, an ionomer, or a rubber / elastomer.   The display sheet according to any one of claims 2 to 8, wherein the thickness of the front side synthetic resin composition layer (12) or the back side synthetic resin composition layer (14) is 10 to 200 µm.   The display sheet according to any one of claims 1 to 15, wherein the ink layer (13) is formed by any one of ink jet printing, silk screen printing, offset printing, gravure printing, letterpress printing or flat printing. It further comprises a release paper (16) laminated on the surface of the adhesive layer (15),
The display according to any one of claims 1 to 16, wherein the release paper (16) is made of crepe paper which is creped and has a tensile elongation at break as measured in accordance with JIS-P-8113 in the range of 5 to 50%. Sheet.

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