JP2005113661A - Tile for bonding by elastic adhesive and adhesion construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tile capable of preventing destruction of an adhesive layer which becomes a joint part even when the adhesive is deformed and follows a moving substrate, and to provide an adhesion construction method. <P>SOLUTION: In this tile, all the peripheral fringe parts on a rear surface of the tile are recessed parts. An elastic adhesive having elongation rate in dumbbell-like No. 2 shape specified in JIS K 7113 specification after hardening is 30% or more is used. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a tile suitable for elastic adhesive tension that easily follows the movement of a base, and a construction method using the tile and the elastic adhesive.

Traditionally, tile construction has generally been performed using mortar. The tile for mortar construction is provided with a back foot on the back surface, and a high anchoring strength is obtained by a mechanical anchoring effect caused by the mortar entering and hardening into a groove between adjacent back feet. Note that a plurality of back feet are provided in parallel on the back surface of the tile with a constant width and a constant depth.

On the other hand, due to various advantages such as better work efficiency and shorter construction period compared to mortar construction, in recent years construction methods for bonding tiles to the ground using organic adhesives instead of mortar construction have become widespread. It's getting on. Among them, an elastic adhesive such as a modified silicone type or a urethane type is effective in preventing tile peeling and peeling because the adhesive can follow the movement of the base.

The tile for adhesive construction does not need to be mechanically fitted between the mortar and the tile unlike the tile for mortar construction, so the depth of the groove on the back surface may be relatively shallow, In the case of a tile having no groove and a flat surface, when the adhesive is adhered to the base, the tile is easily displaced by a slight external force until the adhesive is cured.

For this reason, many conventional tiles with adhesives have a back foot, but several back foot shapes have been proposed that focus on the problems specific to organic adhesives. As an example, in order to prevent air entrainment at the time of pasting, there is one in which an inclination is provided in the depth of the groove (for example, see Patent Document 1). On the other hand, a technique has been proposed in which the back foot is raised and a gap is formed between the tile and the adhesive layer when pasting to form a drainage for rainwater (for example, see Patent Document 2).
JP-A-9-195481 Utility model registration 2105722

In the above conventional tiles for adhesive bonding, the back foot exists up to the outer periphery of the tile, and the side surface of the back foot facing the outer periphery of the tile and the adhesive layer are bonded only by the thickness portion of the adhesive layer. (Refer to FIG. 1 (b)), when the adhesive serving as the joint follows the movement of the ground, cracks are likely to occur from the side surface of the back foot. In tile construction with organic adhesives, there is a case where joint filling is not performed, but in this case, the appearance of the adhesive layer which becomes the joint part is significantly impaired by the cracks generated in this case, and the cracks enter the water. There was a problem that the long-term durability was impaired as a route.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a tile and an adhesive method for preventing the destruction of the adhesive layer serving as a joint portion with respect to a moving base. It is to be.

(1) (A) The tile for adhesive bonding, wherein the peripheral portion of the back surface of the tile is a concave portion.
(2) (B) A tile for adhesive application, characterized in that the peripheral edge of the back surface of the tile is all concave, and the width of the concave is 2 mm or more.
(3) Tile using an adhesive adhesive tile comprising (A) or (B) and (C) an elastic adhesive having an elongation of 30% or more in dumbbell-shaped No. 2 as defined in JIS K 7113 Construction method.

According to the tile for elastic adhesive of the present invention, even if the adhesive layer follows the moving base, the adhesive layer at the joint and the tile end is prevented from being broken and the joint material is not filled. In order to maintain a good appearance and prevent water intrusion for many years, the long-term durability of tile adhesion is improved.

Hereinafter, embodiments of the present invention will be specifically described.

The adhesive-clad tile 20 shown in FIG. 2 is characterized in that the four peripheral edges of the rectangle are all concave portions. In the tile for adhesive bonding and the construction method, an adhesive layer having a thickness corresponding to the depth of the concave portion is formed between the peripheral edge of the tile back surface and the base, regardless of the strength of pressing, when bonded. (See FIG. 2 (b)). Since the adhesive layer is formed continuously with the adhesive layer at the joint, the stress is dispersed even if the elastic adhesive follows the movement of the base and deforms, and the adhesive is continuous with the joint layer. Since the agent layer has an adhesive surface at the periphery of the back surface of the tile in addition to the side surface portion of the back foot, it can withstand a greater deformation strength. For this reason, it is preferable that the concave portion of the tile periphery is wide. Although this invention does not limit the width | variety of the recessed part of a tile back surface peripheral part, the effect of this invention can be further ensured by having a width | variety of 2 mm or more for the said reason.

For the same reason, the depth of the concave portion at the peripheral edge of the tile back surface in the present invention is preferably deeper. Although this invention does not limit the depth of the recessed part of the said tile back surface peripheral part, the effect of this invention can be further ensured by having a depth of 0.5 mm or more.

In the present invention, the thickness of the adhesive to be applied is not limited. However, when the thickness of the adhesive layer is thinner than the depth of the concave portion on the periphery of the back surface of the tile, the adhesive is applied to the concave portion in advance. The effect of the present invention can be ensured.

In the present invention, the height of the back foot is not particularly limited, but is practically in the range of 0.2 mm to 5 mm, preferably 0.3 mm to 3 mm, more preferably 0.5 mm to 2 mm. If it is less than 0.2 mm, the shift is likely to occur with a slight force immediately after bonding. If it is higher than 5 mm, voids are likely to occur in the recesses in the grooves, and the adhesion area is likely to be reduced. Further, a large amount of adhesive is required to fill the groove, which is not preferable because the cost is increased.

In the present invention, the depths of the grooves and the recesses on the peripheral edge of the back surface do not need to be constant, and may be inclined.

The adhesive of the present invention is preferably an elastic adhesive having an elongation percentage of 30% or more, more preferably 50% or more, in the dumbbell shape No. 2 defined in JIS K 7113 after curing. If it is less than 30%, the elongation for following the deformation of the base is not sufficient, and cracks are likely to occur at tile ends and joints even with this construction method. The main component is preferably a modified silicone type or urethane type, but is not limited thereto.

FIG. 1 shows a typical example of a conventional tile, where (A) is a plan view of the back side of the tile, (B) is a cross-sectional view taken along the longitudinal direction 1a-1a 'in the longitudinal direction of the tile bonded to the base, C) is a side view in the short direction. FIG. 2 shows an embodiment of the tile for elastic adhesive of the present invention, where (A) is a plan view of the back surface of the tile, and (B) is cut by the back foot 2a-2a ′ in the longitudinal direction of the tile bonded to the base. It is sectional drawing, (c) is a side view of a transversal direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Adhesive 2 ... Base material 10, 20 ... Tile for adhesive bonding 11, 21 ... Groove 12, 22 Back foot 23 ... Concave

Claims (3)

(A) The tile for adhesive bonding, wherein the peripheral edge of the back surface of the tile is all concave. (B) The width of the recessed part of a peripheral surface peripheral part is 2 mm or more, The tile for adhesive bonding of Claim 1 characterized by the above-mentioned. A tiled construction method using an adhesive-bonded tile according to claim 1 and (C) an elastic adhesive having an elongation of 30% or more in dumbbell-shaped No. 2 defined in JIS K 7113 after curing.

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