JP4809825B2 - Tile joint material for tipping method and manufacturing method thereof - Google Patents

Description

  The present invention relates to a tile joint material for a front-end construction method used for manufacturing a tiled precast concrete board used for an outer wall of concrete and the like, and a method for manufacturing the same.

  Conventionally, when tiling the outer wall of a building, etc., a method is used in which a precast concrete plate with tiles embedded in concrete in advance is manufactured and this precast concrete plate with tiles is fixed to the outer wall of the building. Has been. This method is generally referred to as a tile leading method.

  When manufacturing the above-mentioned precast concrete board with tiles, as shown in FIG. 1, a lattice shape in which tile insertion portions 14 as shown in FIG. 2 are punched out on the adhesive-coated surface 12 of the base material 10 made of paper or plastic. The joint material 16 is affixed, and the tile 18 is inserted into the tile insertion portion 14 of the joint material 16, and the surface (tile surface) of the tile 18 is adhered to the adhesive-applied surface 12 of the substrate 10. Thereafter, the whole is turned over and uncured concrete 20 is placed thereon. After the concrete 20 is cured, the base material 10 and the joint material 16 are peeled from the tile 18 and the concrete 20. Thereby, the precast concrete board with a tile by which the tile was embed | buried by the predetermined arrangement | sequence is completed. In addition, as a joint material, you may affix the stick-shaped joint material matched with joint width on the adhesive application surface of a base material.

  As the tile joint material for the front-end construction method described above, what has been conventionally described in Patent Document 1 has been proposed. The joint material of Patent Document 1 is a tile joint material for a front-end construction method used when manufacturing a tile-embedded concrete panel used for an outer wall of a concrete building or the like, and an expansion ratio of 1 in which the joint material is extruded. .5 to 30 times closed cell foam, the adhesive sheet side adhesive surface as a base material is subjected to electron beam irradiation treatment to be a smooth surface, and the concrete side adhesive surface is roughened without being subjected to electron beam irradiation treatment. The surface is left as it is (claim 1).

Japanese Patent No. 3968666

  The joint material of Patent Document 1 is subjected to an electron beam irradiation treatment on the side surface of the base material of the extruded foam sheet. However, in the method of applying the electron beam irradiation treatment to the foamed sheet, the surface strength of the side surface of the base material of the foamed sheet cannot be sufficiently increased. In such a process, time and cost are consumed more than necessary, and the joint portion becomes rough due to the process.

  In addition, in the method of applying the electron beam irradiation treatment to the foamed sheet, since the side surface of the base material of the foamed sheet cannot be sufficiently smoothed, the adhesive force between the base material and the joint material becomes weak, and the concrete When the joint material is peeled off, there is a problem that the joint material remains on the concrete.

  Furthermore, the joint material of Patent Document 1 is not subjected to electron beam irradiation treatment on the concrete side of the foam sheet, and the surface strength of the concrete side is remarkably low. In the process of performing the processing, time and cost are consumed more than necessary, and the joint portion becomes rough due to the process.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a tile joint material for a front-end construction method having high surface strength on both sides and excellent in smoothness of a side surface of a base material and a method for producing the same. And

In order to achieve the above object, the present invention provides a tile joint material for a front-end construction method used in the manufacture of a precast concrete board with tiles, wherein the joint material is composed of a polyolefin resin foam sheet, and the polyolefin resin foam sheet. Electron beam irradiation treatment is performed on both sides of the sheet before foaming the sheet, and on one side of the polyolefin resin foam sheet, smoothing treatment is performed after foaming the sheet by pressing it with a cooling roll while the sheet is heated. Provided is a tile joint material for a front-end construction method.

Moreover, in order to achieve the above-mentioned object, the present invention provides a method for producing a tile joint material for a front-end construction method used in the production of a tiled precast concrete board, and performs electron beam irradiation treatment on both surfaces of the polyolefin resin unfoamed sheet. An electron beam irradiation treatment step, a foaming step of foaming the polyolefin resin non-foamed sheet to obtain a polyolefin resin foamed sheet, and smoothing pressing one side of the polyolefin resin foamed sheet with a cooling roll in a heated state of the sheet There is provided a method for producing a tile joint material for a front-end construction method, characterized by comprising a forming treatment step and a joint material preparation step of processing the smoothed polyolefin resin foam sheet into a joint material.

  As the polyolefin-based resin foam sheet forming the joint material of the present invention, a polyethylene cross-linked foam sheet, a polypropylene cross-linked foam sheet, a non-cross-linked polyethylene foam sheet, etc. having a closed cell structure are used from the viewpoints of strength, ease of use, and cost. However, it is not limited to these.

As the polyolefin resin foam sheet for forming the joint material of the present invention, it is preferable to use a foam having a density of 0.05 to 0.2 g / cm ³ , particularly 0.05 to 0.1 g / cm ³ . When the density is less than 0.05 g / cm ³ , the mechanical strength and strain of the foam may be reduced, and workability may be deteriorated due to tearing at the time of peeling. When the density exceeds 0.2 g / cm ³ The flexibility is lowered and workability is deteriorated, and the surface state of the foam may be deteriorated.

  The shape, size, and the like of the joint material of the present invention can be appropriately set according to the shape, size, and the like of the target tiled precast concrete board.

  Since the tile joint material for the front-end construction method of the present invention is subjected to electron beam irradiation treatment on both surfaces of the polyolefin resin non-foamed sheet, the sheet is foamed, so that the surface strength of both surfaces is very high. Therefore, there is no sticking of the joint material to the tile surface or joint part, and the time and cost are spent more than necessary in the process of performing the high pressure cleaning process, and the joint part may become rough due to the process. Absent.

Moreover, since the tile joint material for the front-end construction method of the present invention is smoothed by pressing one side of the polyolefin-based resin foam sheet with a cooling roll while the sheet is heated, the smoothness of this surface is very high. . Therefore, by setting this surface as the side surface of the base material, it is possible to obtain an effect that sufficient adhesive force is obtained between the surface and the problem of peeling does not occur.

  Furthermore, in the tile joint material for the tip construction method of the present invention, since one side of the polyolefin resin foam sheet is not smoothed, this side is rough. Therefore, by making this surface a concrete side surface, the concrete surface of the joint portion is finished to be a rough surface, so that it is possible to obtain an effect that the color unevenness of the concrete surface can be made inconspicuous. That is, if the concrete side surface of the joint material is smooth, the concrete surface of the joint part is finished smoothly, and thus the color unevenness of the concrete surface becomes conspicuous. However, according to the present invention, such inconvenience can be solved. .

  Next, an embodiment of the present invention will be described. The tile joint material for the tip method according to the present invention can be manufactured, for example, by the following procedure.

  (1) Electron beam irradiation treatment is performed on both surfaces of a polyethylene non-foamed sheet crosslinked with a chemical crosslinking agent (electron beam irradiation treatment step). The electron beam irradiation processing conditions can be, for example, an acceleration voltage of 300 kv and an irradiation dose of 50 kGy.

(2) The polyethylene unfoamed sheet is foamed to obtain a polyethylene crosslinked foamed sheet (foaming step). In this case, for example, a foaming agent is contained in the polyethylene unfoamed sheet, and the polyethylene unfoamed sheet can be heated and foamed in a heating foaming furnace. It is appropriate that the density of the polyethylene crosslinked foamed sheet is 0.05 to 0.2 g / cm ³ and the expansion ratio is 5 to 20 times.

(3) One side of the polyolefin resin foam sheet is heated to about 400 to 500 ° C. with a heater, and then smoothed by pressing and molding one side of the polyolefin resin foam sheet with a cooling roll (smoothing process) Process) .

  (4) A tile-shaped joint material is produced by punching out the tile insertion portion of the polyolefin resin foam sheet subjected to the smoothing treatment using a Thomson blade or the like (joint material production step). Moreover, you may produce a rod-shaped joint material.

It is explanatory drawing explaining the manufacturing process of the precast concrete board with a tile. It is a perspective view which shows an example of a joint material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Base material 12 Adhesive application surface 14 Tile insertion part 16 Joint material 18 Tile 20 Concrete

Claims (4)

In a tile joint material for a front-end construction method used for manufacturing a tiled precast concrete board, the joint material is made of a polyolefin resin foam sheet, and both sides of the polyolefin resin foam sheet are subjected to electron beam irradiation treatment. A front-end construction method characterized in that, before being foamed, a smoothing treatment is performed after foaming of the sheet on one side of the polyolefin-based resin foamed sheet, which is pressed with a cooling roll while the sheet is heated. Tile joint material. The tile joint material for a leading method according to claim 1, wherein the density of the polyolefin resin foam sheet is 0.05 to 0.2 g / cm ³ . In the method of manufacturing a tile joint material for a front-end construction method used for manufacturing a precast concrete board with a tile, an electron beam irradiation treatment step of performing electron beam irradiation treatment on both surfaces of the polyolefin resin unfoamed sheet, and the polyolefin resin unfoamed A foaming step of foaming a sheet to obtain a polyolefin-based resin foamed sheet, a smoothing treatment step of pressing one side of the polyolefin-based resin foamed sheet with a cooling roll while heating the sheet, and a polyolefin subjected to the smoothing treatment A method for producing a tile joint material for a front-end construction method, comprising: a joint material preparation step of processing a resin-based resin foam sheet into a joint material. The method for producing a tile joint material for a leading method according to claim 3, wherein the density of the polyolefin-based resin foam sheet is 0.05 to 0.2 g / cm ³ .

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