Pavement block repair method and repair tape

Abstract

To provide a pavement block repair method and a repair tape that can provide appropriate emergency treatment even on a wet installation surface.SOLUTION: A pavement block repair method includes an adhesive application step and an adhering step; in the adhesive application step, an adhesive 8 containing cyanoacrylate is applied to the adhesive layer 7 of the repair tape 4 to form adhesive areas 9 and adhesive areas 10, in the adhering step, the repair tape 4 is affixed between adjacent braille blocks 2 and braille blocks 3 to be repaired (or the installation surface 1) in such directions that the adhesive areas 9 and adhesive areas 10 are attached across joint areas 13 between the braille blocks 3 to be repaired and the braille blocks 2 (or the boundary areas 14 between the braille blocks 3 to be repaired and the installation surface 1), with the periphery of the braille blocks 3 as the boundary.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a paving block repair method and repair tape that can be applied to paving blocks and the like laid on the surface of a pavement even when the blocks are wet. [Background technology]

[0002] Conventionally, in construction work in which blocks for guiding visually impaired people (hereinafter referred to as "braille blocks") are installed on the surface of pavement in train stations, roads, etc., according to the description in Patent Document 1 below, adhesive tape is attached to the edges of the braille blocks in order to protect them during construction, even after the braille blocks have been installed.

[0003] Adhesive tape is also used as a temporary fix when tactile paving blocks peel off or crack from their installation surface due to pedestrian traffic or deformation of the pavement. In particular, when the tactile paving blocks are made of tile or concrete, the tactile paving blocks can become loose, causing unevenness in the installation surface. Since it takes time to reintegrate the tactile paving blocks into the pavement through repair work, adhesive tape can be used as a temporary fix to prevent loosening until repair work can begin. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-129711 Summary of the Invention [Problem to be solved by the invention]

[0005] However, if the installation surface is wet due to rainwater or the like, the adhesive tape will not stick to the installation surface, and this will not be an appropriate emergency measure.

[0006] The present invention has been proposed in view of the above-mentioned circumstances, and aims to provide a paving block repair method and repair tape that can provide appropriate emergency repairs even on wet installation surfaces. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the paving block repair method of the present invention is characterized by including an adhesive application step of applying an adhesive containing cyanoacrylate to the adhesive layer of a repair tape having a base layer and an adhesive layer to form an adhesive area where the adhesive is applied and an adhesive area where the adhesive is not applied, and an application step of sticking the repair tape to the periphery of a paving block that has been peeled off from the installation surface.

[0008] The paving block repair method of the present invention is characterized in that, in the attachment procedure, the adhesive area and the sticky area are oriented so as to adhere across the paving block and the paving block adjacent to the paving block or the installation surface, with the periphery of the paving block as the boundary.

[0009] The paving block repair method according to the present invention is characterized in that in the adhesive application step, the adhesive is piled up in a convex shape and in stripes.

[0010] The paving block repair method of the present invention is characterized in that in the adhesive application step, the adhesive is applied to the longitudinal repair tape along the periphery of the paving block at predetermined intervals in the longitudinal direction and across the width, thereby forming multiple adhesive areas.

[0011] The paving block repair method according to the present invention is characterized in that the amount of plasticizer contained in the base layer is 20 percent or more and 35 percent or less.

[0012] The paving block repair method of the present invention is characterized by having a barrier layer between the base layer and the adhesive layer that prevents the plasticizer contained in the base layer from migrating to the adhesive layer.

[0013] The paving block repair method according to the present invention is characterized in that the thickness of the adhesive layer is 200 to 350 micrometers.

[0014] The paving block repair method according to the present invention is characterized by including a curing accelerator application step of applying a curing accelerator to a portion where the repair tape is to be attached before the pasting procedure.

[0015] The repair tape according to the present invention has a base material layer, an adhesive layer laminated on the base material layer, and an adhesive layer applied to the adhesive layer, wherein the adhesive layer contains cyanoacrylate, and the adhesive layer has an adhesive region to which the adhesive layer is applied and an adhesive region to which the adhesive layer is not applied.

[0016] The repair tape according to the present invention is characterized in that the adhesive layer is convexly raised.

[0017] The repair tape according to the present invention has a plurality of the adhesive regions, and the adhesive regions extend at a predetermined interval in the longitudinal direction of the repair tape and in the width direction.

[0018] The repair tape according to the present invention is characterized in that the blending amount of the plasticizer contained in the base material layer is 20 percent or more and 35 percent or less.

[0019] The repair tape according to the present invention is characterized by having a barrier layer between the base material layer and the adhesive layer for suppressing the migration of the plasticizer contained in the base material layer to the adhesive layer.

[0020] The repair tape according to the present invention is characterized in that the thickness of the adhesive layer is 200 to 350 micrometers.

Advantages of the Invention

[0021] The paving block repair method of the present invention includes an adhesive application step of applying a cyanoacrylate-containing adhesive to the adhesive layer of a repair tape having a base layer and an adhesive layer, thereby forming an adhesive-coated adhesive area and an adhesive-free adhesive area, and an application step of attaching the repair tape to the periphery of a paving block that has been peeled from the installation surface. Cyanoacrylate reacts dramatically with water, hardening rapidly with the heat of reaction. Therefore, even on an installation surface wetted by rainwater or the like, the adhesive hardens by reacting with water in the adhesive area, firmly connecting the repair tape to the paving block. While the dried and hardened adhesive solidifies and may crack due to impacts from foot traffic, the adhesive layer adheres to the paving block in the adhesive area, allowing the repair tape to remain firmly attached to the periphery of the paving block even when impacts are applied. This allows for appropriate emergency repairs to be performed even on wet installation surfaces.

[0022] In the paving block repair method of the present invention, the adhesive and sticky areas are oriented to adhere across the paving block and adjacent paving blocks or the installation surface, with the periphery of the paving block as the boundary. Because the adhesive and sticky areas are attached across the periphery of the peeled paving block and its surroundings, even if there are wet and dry areas, the wet areas will adhere at the adhesive areas and the dry areas will adhere at the sticky areas. This allows for appropriate emergency repairs.

[0023] In the adhesive application step of the paving block repair method according to the present invention, the adhesive is applied in a convex and streaky pattern. This configuration ensures that the adhesive area is clearly defined, and that the adhesive and sticky areas are reliably formed. Furthermore, if the adhesive is applied in a convex pattern, it conforms to the unevenness of the application area, ensuring that the adhesive penetrates the paving blocks. However, if the adhesive has low viscosity and cannot be applied in a convex pattern, the adhesive may spread across the sticky layer, preventing the adhesive and sticky areas from being clearly defined, preventing the adhesive and sticky areas from fulfilling their respective roles.

[0024] The paving block repair method according to the present invention, in the adhesive application procedure, forms a plurality of adhesive regions by applying an adhesive to a longitudinal repair tape along the periphery of the paving block at predetermined intervals in the longitudinal direction and across the width direction. Therefore, appropriate emergency measures can be taken even on a wet installation surface.

[0025] In the paving block repair method according to the present invention, the blending amount of the plasticizer contained in the base material layer is 20% or more and 35% or less. That is, compared with a general adhesive tape, since the amount of the plasticizer is small, the amount of the plasticizer migrating to the adhesive layer is also reduced. Therefore, excessive softening of the adhesive layer can be prevented. Also, since the elongation rate of the repair tape due to the plasticizer is suppressed, even if the repair tape is pulled when the paving block rattles, the repair tape does not follow the rattling of the paving block and appropriate emergency measures can be taken.

[0026] The paving block repair method according to the present invention has a barrier layer between the base material layer and the adhesive layer that suppresses the migration of the plasticizer contained in the base material layer to the adhesive layer. Therefore, the migration of the plasticizer to the adhesive layer is prevented by the barrier layer, and softening of the adhesive layer can be prevented.

[0027] In the paving block repair method according to the present invention, the thickness of the adhesive layer is 200 to 350 micrometers. Since the amount of the plasticizer is small and the elongation rate of the repair tape is also suppressed, it becomes difficult for the repair tape to follow the unevenness of the pasting site. However, since the thickness of the adhesive layer is within a predetermined range, the adhesive layer can be appropriately adapted to the unevenness of the pasting site.

[0028] The paving block repair method according to the present invention undergoes a curing accelerator application procedure of applying a curing accelerator to the site where the repair tape is to be pasted before the pasting procedure. The adhesive reacts with the curing accelerator and reaches the maximum hardness early. Therefore, emergency measures can be taken quickly.

[0029] The repair tape according to the present invention has a base material layer, an adhesive layer laminated on the base material layer, and an adhesive layer applied to the adhesive layer. The adhesive layer contains cyanoacrylate, and the adhesive layer has an adhesive region to which the adhesive layer is applied and an adhesive region to which the adhesive layer is not applied. Since cyanoacrylate reacts violently with water and cures rapidly with reaction heat, even on an installation surface wetted by rainwater or the like, in the adhesive region, the adhesive layer cures by reacting with water, and the adhesive layer firmly connects the repair tape and the object to be repaired. The dried and cured adhesive layer solidifies and may crack under the impact of an external force. However, in the adhesive region, since the adhesive layer adheres to the object to be repaired, even when an impact is applied, the repair tape remains firmly attached to the object to be repaired. Therefore, appropriate emergency measures can be taken even on a wet installation surface.

[0030] In the repair tape according to the present invention, the adhesive layer is convexly raised. With this configuration, the adhesive region can be reliably partitioned, and the adhesive region and the adhesive region can be reliably formed. Further, if the adhesive layer is convexly raised, it can conform to the unevenness of the pasting site, so that the adhesive layer can be reliably penetrated into the object to be repaired. Incidentally, if the viscosity of the adhesive layer is low and it is not convexly raised, the adhesive layer may spread over the adhesive layer, and the adhesive region and the adhesive region may not be partitioned, and both may not be able to perform their respective roles.

[0031] The repair tape according to the present invention has a plurality of adhesive regions, and the adhesive regions extend at a predetermined interval in the longitudinal direction of the repair tape and in the width direction. Therefore, appropriate emergency measures can be taken even on a wet installation surface.

[0032] The repair tape according to the present invention has a plasticizer content in the base material layer of 20% or more and 35% or less. That is, compared with a general adhesive tape, since the amount of the plasticizer is small, the amount of the plasticizer migrating to the adhesive layer is also reduced. Therefore, excessive softening of the adhesive layer can be prevented. In addition, since the elongation rate of the repair tape due to the plasticizer is suppressed, even if the repair tape is pulled due to the rattling of the object to be repaired, the repair tape does not follow the rattling of the object to be repaired, and appropriate emergency treatment can be performed.

[0033] The repair tape according to the present invention has a barrier layer between the base material layer and the adhesive layer that inhibits the plasticizer contained in the base material layer from migrating to the adhesive layer. Therefore, the migration of the plasticizer to the adhesive layer is prevented by the barrier layer, and softening of the adhesive layer can be prevented.

[0034] The repair tape according to the present invention has an adhesive layer with a thickness of 200 to 350 micrometers. Since the amount of the plasticizer is small and the elongation rate of the repair tape is also suppressed, it becomes difficult for the repair tape to follow the unevenness of the pasting site. However, since the thickness of the adhesive layer is within a predetermined range, the adhesive layer can be appropriately adapted to the unevenness of the pasting site.

Brief Description of the Drawings

[0035]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0036] A paving block repair method and repair tape according to an embodiment of the present invention will be described below with reference to the drawings. Note that while this embodiment is directed to tactile paving blocks, the present invention also includes embodiments directed to, for example, capstones, pavement surfaces, and blocks without Braille. Figure 1 shows an outline of the repair tape 4 used in the paving block repair method according to this embodiment. Figure 2 shows a plan view of a surface on which tactile paving blocks 2 are installed, showing how the tactile paving blocks 2 are being repaired with the repair tape 4.

[0037] As shown in Figures 1 and 2, the paving block repair method involves taking emergency measures by fastening a tactile paving block 2 (hereinafter referred to as the "tactile paving block 3 to be repaired") that has peeled off from a surface 1 such as asphalt with repair tape 4.

[0038] As shown in FIG. 1 , the repair tape 4 includes a base layer 5, a barrier layer 6 laminated on the backside of the base layer 5, an adhesive layer 7 laminated on the backside of the barrier layer 6, and a silicone-based separator (not shown) attached to the backside of the adhesive layer 7. The base layer 5 is primarily composed of, for example, a polyvinyl chloride copolymer, and is embossed on its front side for anti-slip purposes. The adhesive layer 7 is a viscoelastic material primarily composed of, for example, an acrylic ester copolymer. The barrier layer 6 is primarily composed of, for example, a vinyl chloride-vinyl acetate copolymer. The base layer may be made of, for example, alumina or glass, and may contain particles with high anti-slip properties. The barrier layer may be made of, for example, polyethylene, polypropylene, polyurethane resin, acrylic resin, polyester resin, polyamide resin, or the like.

[0039] The base layer 5 contains a plasticizer, such as a phthalic acid-based, adipic acid-based, or phosphoric acid-based plasticizer. The amount of plasticizer in the base layer 5 is about 20 to 35 percent [%] of the base layer 5, preferably 30 percent [%], and more preferably 22 percent [%].

[0040] The thickness of the base material layer 5 is approximately 950 micrometers [μm]. The thickness of the adhesive layer 7 is from 200 to 350 micrometers [μm], preferably approximately 300 micrometers [μm], more preferably approximately 250 micrometers [μm]. The thickness of the barrier layer 6 is approximately 20 micrometers [μm]. Note that the thickness of the separator is approximately 100 micrometers [μm].

[0041] Next, a paving block repair method using the repair tape 4 will be described based on the drawings. In the paving block repair method, at least an adhesive application procedure and an attachment procedure are performed. Further, in the paving block repair method, if necessary, a curing accelerator application procedure is performed before the adhesive application procedure or the attachment procedure.

[0042] As shown in FIG. 1, the repair tape 4 is cut into a rectangle of an appropriate length. Specifically, the length of the repair tape 4 follows the length of the periphery of the braille block 2, for example, it is 300 millimeters [mm] corresponding to the length of one side of the braille block 2. The width of the repair tape 4 is such that it can span the joint portion 13 between adjacent braille blocks 2 or the boundary portion 14 between the braille block 2 and the installation surface 1.

[0043] In the adhesive application procedure, an adhesive 8 is applied to the adhesive layer 7 of the repair tape 4 to form an adhesive application area 9 where the adhesive 8 is applied and an adhesive-free adhesive area 10. Specifically, in the adhesive layer 7, a single strip of adhesive application area 9 is formed by passing the adhesive 8 from one end to the other end in the width direction of the repair tape 4. This operation is repeated at a predetermined interval in the longitudinal direction of the repair tape 4 to form a plurality of adhesive application areas 9 and adhesive areas 10. When forming the adhesive application area 9, the adhesive 8 is heaped up in a convex shape. The width 12 of the adhesive area 10 (the length in the longitudinal direction of the repair tape 4), which is the interval between the adhesive application areas 9, is from about 30 to 90 millimeters [mm], preferably about 75 millimeters, and more preferably about 50 millimeters [mm].

[0044] The adhesive 8 contains cyanoacrylate. The adhesive 8 has a high viscosity, and the solution viscosity is about 6,000 to 20,000 millipascal seconds [mPa·s].

[0045] As shown in FIG. 2, in the pasting procedure, the repair tape 4 is pasted along the periphery of the braille block 3 to be repaired. At this time, between the adjacent braille block 2 and the braille block 3 to be repaired, the adhesive area 9 and the adhesive area 10 straddle the joint portion 13 between the braille block 3 to be repaired and the braille block 2 adjacent to the braille block 3 to be repaired with the periphery of the braille block 3 to be repaired as the boundary, and the repair tape 4 is pasted in a direction of attachment. Similarly, between the braille block 3 to be repaired and the installation surface 1, the adhesive area 9 and the adhesive area 10 straddle the boundary portion 14 between the braille block 3 to be repaired and the installation surface 1 with the periphery of the braille block 3 to be repaired as the boundary, and the repair tape 4 is pasted in a direction of attachment.

[0046] Finally, using hands, feet, tools, etc. (not shown), by pressing the repair tape 4 from above, the adhesive area 9 and the adhesive area 10 are pressed against the braille block 3 to be repaired, etc., so as to conform to the unevenness of the pasting site where the repair tape 4 is pasted.

[0047] When going through the hardening accelerator application procedure, a hardening accelerator is applied to the pasting site. The hardening accelerator is composed of, for example, an amine compound and an organic solvent such as acetone, ethanol, and methanol.

[0048] As described above, the paving block repair method using the repair tape 4 is implemented.

[0049] Next, the effects of this embodiment will be described.

[0050] As described above, the paving block repair method involves an adhesive application step and an attachment step. In the adhesive application step, adhesive 8 containing cyanoacrylate is applied to adhesive layer 7 of repair tape 4 to form adhesive area 9 and adhesive area 10. In the attachment step, repair tape 4 is attached along the periphery of braille block 3 to be repaired. Cyanoacrylate reacts dramatically with water and hardens rapidly with the heat of reaction. Therefore, even if installation surface 1 (or braille block 2) is wet due to rainwater or the like, adhesive 8 hardens in adhesive area 9 by reacting with water, and adhesive 8 firmly connects repair tape 4 to braille block 3 to be repaired. The adhesive 8 that has dried and hardened solidifies and may crack due to impact from foot traffic, but because the viscoelastic adhesive layer 7 in the adhesive region 10 adheres to the tactile paving block 3 to be repaired, the repair tape 4 remains firmly attached across the tactile paving block 3 to be repaired and the tactile paving block 2 (or installation surface 1) even when an impact is applied. Therefore, appropriate emergency repairs can be performed even on a wet installation surface 1 (or tactile paving block 2).

[0051] In particular, in the application procedure, repair tape 4 is applied between adjacent braille blocks 2 and the braille block to be repaired 3 in a direction such that adhesive areas 9 and 10 are attached across joints 13 between the braille block 3 to be repaired and the braille block 2, with the periphery of the braille block 3 as the boundary, and repair tape 4 is applied between the braille block 3 to be repaired and the installation surface 1 in a direction such that adhesive areas 9 and 10 are attached across boundary 14 between the braille block 3 to be repaired and the installation surface 1, with the periphery of the braille block 3 as the boundary. Because adhesive areas 9 and 10 are attached across the periphery of the braille block 3 to be repaired and its surroundings, even if there are wet and dry areas in the application area, the wet areas are adhered at adhesive areas 9 and the dry areas are adhered at adhesive areas 10. Therefore, appropriate emergency measures can be taken.

[0052] In the adhesive application procedure, an adhesive strip 9 is formed by passing the adhesive 8 from one end to the other end in the width direction of the repair tape 4, and at that time, the adhesive 8 is heaped up in a convex shape. Since the adhesive 8 has a high viscosity and does not spread onto the adhesive layer 7, the adhesive area 9 is reliably partitioned, and the adhesive area 9 and the adhesive area 10 can be reliably formed. Further, if the adhesive 8 is heaped up in a convex shape, it can conform to the unevenness of the pasting site, so that the adhesive 8 can be reliably penetrated into the pasting site.

[0053] Here, since the solution viscosity of the adhesive 8 is about 6,000 to 20,000 millipascal seconds [mPa·s], the thickness of the adhesive 8 applied to the adhesive layer 7 becomes a convex shape of at least 2 to 3 millimeters [mm], and the adhesive 8 can be appropriately applied to the adhesive layer 7.

[0054] Further, in the adhesive application procedure, in the adhesive layer 7, a plurality of adhesive strips 9 are formed at predetermined intervals in the longitudinal direction of the repair tape 4. Specifically, if the width 11 of the adhesive area 9 is about 9 millimeters [mm] and the width 12 of the adhesive area 10, which is the interval between the adhesive areas 9, is 30 to 100 millimeters [mm], the adhesive area 9 and the adhesive area 10 are appropriately pasted onto various types of pasting sites with different wetting states, and adhere to the wet part and the non-wet part.

[0055] In the paving block repair method, a curing accelerator application procedure is performed before the adhesive application procedure or the pasting procedure. The adhesive 8 reacts with the curing accelerator and reaches the maximum hardness early. Therefore, emergency treatment can be performed quickly.

[0056] In the repair tape 4, the blending ratio of the plasticizer contained in the base material layer 5 is 20 percent or more and 35 percent or less. Therefore, the amount of the plasticizer migrating to the adhesive layer 7 is not reduced, and excessive softening of the adhesive layer 7 can be prevented. Further, since the elongation rate of the repair tape 4 due to the plasticizer is suppressed, even if the repair tape 4 is pulled by the rattling of the repair target braille block 3, the repair tape 4 does not follow the rattling of the repair target braille block 3, and appropriate emergency treatment can be performed.

[0057] The repair tape 4 has a barrier layer 6 between the base material layer 5 and the adhesive layer 7. The barrier layer 6 can prevent the softening of the adhesive layer 7 by suppressing the migration of the plasticizer contained in the base material layer 5 to the adhesive layer 7.

[0058] Since the amount of the plasticizer is small and the elongation rate of the repair tape 4 is also suppressed, it is difficult for the repair tape 4 to follow the unevenness of the pasting site. However, since the thickness of the adhesive layer 7 of the repair tape 4 is 200 to 350 micrometers, the adhesive layer 7 conforms to the unevenness of the pasting site. Therefore, the adhesive layer 7 can surely conform to the unevenness of the pasting site.

[0059] Next, examples of the present invention will be described.

[0060] <Appropriate Viscosity Test> The appropriate viscosity of the adhesive was verified. Using low-viscosity, medium-viscosity, and high-viscosity adhesives, the state of the applied adhesive, the degree of adhesion to the braille block, and the strength in the shear direction when trying to peel off the repair tape were verified, respectively. The strength in the shear direction was measured by kicking the repair tape that had been pasted on the road surface for one night 10 times with a strength such that the road surface was gouged. The measurement results are shown in Table 1 below.

[0061]

Table 1

[0062] As shown in Table 1, in all items, the examples obtained better results than the comparative examples. In the examples, even when the adhesive was applied to the adhesive layer, it was difficult to flow and the adhesive could be piled up in a convex shape. In particular, in the verification of the strength in the shear direction, even when trying to peel off the repair tape by hand, the repair tape was firmly adhered to the road surface. It is presumed that hereafter, due to the passage of pedestrians, the repair tape will be repeatedly stepped on and become even more robust. Note that since the comparative example was liquid, it could not be piled up in a convex shape.

[0063] <Testing the appropriate spacing of adhesive (adhesive area)> The appropriate spacing of the adhesive (adhesive area) (in other words, the width of the adhesive area) was verified. Repair tapes with different spacing between adhesives (adhesive areas) were applied to wet braille blocks measuring 300 mm on a side, and the degree of adhesion and adhesiveness after drying were verified. The measurement results are shown in Table 2 below.

[0064] [Table 2]

[0065] As shown in Table 2, in every item, the Examples gave better results than the Comparative Examples.

[0066] <Plasticizer migration test> The migration of the plasticizer contained in the base layer was verified by observing the softening of the adhesive. Repair tapes with different plasticizer contents were prepared and placed in an environment that facilitates migration of the plasticizer to the adhesive layer to examine the softening of the adhesive. The example and comparative examples were subjected to a 500-gram heat press over two weeks at 50°C. They were then subjected to a 2500-gram heat press over three days at 70°C. The measurement results are shown in Table 3 below.

[0067] [Table 3]

[0068] As shown in Table 3, in the Examples, the adhesive hardly protrudes compared to the Comparative Examples, which shows that the adhesive layer is less likely to soften when there is less plasticizer.

[0069] <Tensile strength test of base layer> The tensile strength of the base material layer was verified by reducing the amount of plasticizer contained in the base material layer. In the test, the test specimen was pulled at a speed of 300 millimeters per minute [mm / min], and the resistance value [N] and elongation rate [%] were measured. The measurement results are shown in Table 4 below.

[0070] [Table 4]

[0071] As shown in Table 4, the examples have higher resistance values and lower elongation rates than the comparative examples.

[0072] Furthermore, these test specimens were used to verify the extent to which the wobbling of the braille blocks could actually be reduced. As shown in Figure 3, a braille block 2 with a side length of 300 mm and a braille block to be repaired 3 were placed side by side, and a 5 mm-high aluminum plate was placed under the braille block to be repaired 3, thereby creating a simulated environment in which the braille block to be repaired 3 would wobble. The braille block 2 and the braille block to be repaired 3 were connected by a test specimen attached to the surface. In this state, as shown in Figure 4, when a person weighing 60 kilograms stood on the braille block to be repaired 3, the extent to which the braille block to be repaired 3 would tilt (in other words, the extent to which the test specimen was pulled by the tilting of the braille block to be repaired 3) was verified. The test results are shown in Table 4 (see "Elongation rate at 20 N / 10 mm").

[0073] As shown in Table 4, when the elongation rate of the comparative example is set to 100 percent [%] in the "elongation rate at 20N / 10mm," the elongation rate of the example decreases as the plasticizer content decreases. Therefore, it can be seen that the example is less likely to elongate even when pulled in response to the tilt of the braille block 3 to be repaired, and as a result, rattling of the braille block 3 to be repaired is prevented (see Figure 4).

[0074] <Testing for the proper thickness of the adhesive layer> Using repair tapes with different adhesive layer thicknesses, we verified the degree of adhesion to the braille blocks and the strength in the shear direction when trying to peel the repair tape. The measurement results are shown in Table 5 below.

[0075] [Table 5]

[0076] As shown in Table 5, the Examples achieved better results than the Comparative Examples in all aspects. The Comparative Examples, in which the adhesive layer was too thin, did not adhere to the application site, while the Comparative Examples, in which the adhesive layer was too thick, adhered to the application site but had low strength against shear force.

[0077] <Adhesion test> In accordance with JIS Z 0237, we verified how well the repair tape adheres to the substrate and how difficult it is to remove. The test specimens were immersed in different temperature environments (5°C, 23°C, 30°C) for 24 hours, then attached to the adherend, and after 30 minutes, the resistance value when peeling the test specimen from the adherend was measured as adhesive strength [N / 10 mm]. The measurement results are shown in Table 6 below.

[0078] [Table 6]

[0079] As shown in Table 6, the adhesive strength of the Examples on wet surfaces was better than that of the Comparative Examples under all temperature conditions. Furthermore, the use of a curing accelerator further improved adhesive strength. Since the Examples exhibited high adhesive strength even under ambient temperatures of 5°C and 30°C, it can be said that they are fully effective throughout the year, including in winter and summer. The slip resistance test (CSR' measurement) also exceeded the target value (the applicant's own standard).

[0080] In other embodiments of the present invention, the installation surface includes pavement such as tile or concrete. In other embodiments, if the adhesive regions and the adhesive areas alternate, the adhesive may be applied diagonally in a zigzag pattern. Other embodiments do not have a barrier layer. In other embodiments, the adhesive is pre-applied to the adhesive layer as an adhesive layer.

[0081] As described above in detail are the embodiments of the present invention. However, the present invention is not limited to the above embodiments. And various design changes can be made to the present invention without departing from the matters described in the claims.

Explanation of Reference Numerals

[0082] 1 Installation surface 2 Braille block (pavement block) 3 Braille block to be repaired 4 Repair tape 5 Base material layer 6 Barrier layer 7 Adhesive layer 8 Adhesive 9 Adhesive region 10 Adhesive area 11 Width of adhesive region 12 Width of adhesive area 13 Joint portion 14 Boundary portion 15 Aluminum plate

Claims

1. Among the repair tapes having a base material layer and an adhesive layer, an adhesive application procedure for applying an adhesive containing cyanoacrylate to the adhesive layer to form an adhesive application area where the adhesive is applied and an adhesive-free adhesion area, A pasting procedure for pasting the repair tape to the periphery of a paving block peeled from the installation surface, A paving block repair method characterized by the above.

2. In the pasting procedure, The adhesive application area and the adhesion area are oriented to adhere across the paving block and a paving block adjacent to the paving block or the installation surface with the periphery of the paving block as a boundary. The paving block repair method according to claim 1, characterized by the above.

3. In the adhesive application procedure, The adhesive is heaped in a convex shape and in a streak shape. The paving block repair method according to claim 1 or claim 2, characterized by the above.

4. In the adhesive application procedure, A plurality of the adhesive application areas are formed by applying the adhesive to the longitudinal repair tape along the periphery of the paving block at a predetermined interval in the longitudinal direction and across the width direction. The paving block repair method according to claim 3, characterized by the above.

5. The blending amount of the plasticizer contained in the base material layer is 20% or more and 35% or less. The paving block repair method according to claim 1 or claim 2, characterized by the above.

6. A barrier layer for suppressing the migration of the plasticizer contained in the base material layer to the adhesive layer is provided between the base material layer and the adhesive layer. The paving block repair method according to claim 5, characterized by the above.

7. The thickness of the adhesive layer is 200 to 350 micrometers. The paving block repair method according to claim 5, characterized by the above.

8. Before the pasting procedure, A curing accelerator application procedure for applying a curing accelerator to the part where the repair tape is to be pasted is performed. The paving block repair method according to claim 1 or claim 2, characterized by the above.

9. A base material layer, An adhesive layer laminated on the base material layer, An adhesive layer applied to the adhesive layer, and having The adhesive layer contains cyanoacrylate, The adhesive layer has an adhesive application area where the adhesive layer is applied and an adhesion area where the adhesive layer is not applied. A repair tape characterized by the above.

10. The adhesive layer is heaped in a convex shape. The repair tape according to claim 9, characterized by the above. Claim 11 having a plurality of said adhesive regions, wherein said adhesive regions extend at a predetermined interval in the longitudinal direction of the repair tape and in the width direction, The repair tape according to claim 9 or claim 10, characterized in that. Claim 12 The compounding amount of the plasticizer contained in the base material layer is 20% or more and 35% or less, The repair tape according to claim 9 or claim 10, characterized in that. Claim 13 having a barrier layer between the base material layer and the adhesive layer to prevent the plasticizer contained in the base material layer from migrating to the adhesive layer, The repair tape according to claim 12, characterized in that. Claim 14 The thickness of the adhesive layer is 200 to 350 micrometers, The repair tape according to claim 12, characterized in that.

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