JP2625667B2 - Adhesive flooring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor material that can be securely and efficiently adhered to a floor base at a construction site.

[0002]

2. Description of the Related Art Conventionally, the following method has been used as a method of attaching a floor material made of a wooden material to a floor base such as a mortar finished surface, omitting an operation of applying an adhesive at a construction site. Are known. That is, a method in which a floor material having a pressure-sensitive adhesive applied to the back surface in advance is pressed against a base material at a construction site, and the floor material is bonded to the base material by the adhesive force of the pressure-sensitive adhesive.
The construction procedure of such a sticking type floor material is generally performed in the following order. First, the first floor material is bonded to a predetermined position on the floor substrate, and a floor material to be adjacent to the bonded floor material is temporarily placed immediately on the first floor material. Next, the temporarily placed flooring material is shifted laterally to fit the first flooring material and the actual bonded flooring material,
Determine the position of the temporarily placed flooring. When the position of the flooring material is determined, a pressing force is applied from above to adhere to the floor substrate.

In the above conventional method, the pressure-sensitive adhesive previously applied to the back surface of the flooring material must be kept in a semi-dry state.
It is difficult to provide the adhesive with fluidity, and when the floor material is temporarily placed, the adhesive force is immediately exerted, so that the floor material cannot be moved laterally and the actual fitting cannot be performed properly. Therefore, as the pressure-sensitive adhesive applied to the back surface of such a sticking type flooring material, it is inevitable to use a performance material that balances two contradictory factors of lateral movement and adhesion force of the flooring material during construction. . Therefore, naturally, if the adhesive strength is increased, the construction becomes difficult. If the construction is facilitated, the adhesive strength must be reduced.

In the case of a wooden flooring material, after construction, the back surface absorbs moisture from the floor substrate, so that expansion stress due to expansion of the wooden base material is generated, and water is deprived from the front surface, and consequently tensile stress is generated due to shrinkage. Therefore, there is a tendency to warp into a U-shape.
Therefore, if an adhesive that facilitates lateral movement of the flooring material is used to improve the construction efficiency, the adhesive strength with the floor base is weak. In addition, a bidding phenomenon occurs, which not only impairs aesthetic appearance but also deteriorates walking feeling.

In order to solve such problems, a method has been disclosed as an improved technique in which a film of a liquid agent for temporarily stopping the adhesive force of the adhesive is formed on the adhesive layer (Japanese Patent Laid-Open No. Hei 2 (1994)). -20760). However, in this method, since the film of the liquid agent suppresses the adhesive force of the adhesive, after the mating of the liquid agents and the pressing force are applied, the adhesion of the liquid film until the film is absorbed or volatilized. Since no force is exerted, the time until the adhesive strength is exerted should be longer than in the conventional method. Therefore, in order to obtain a sufficient adhesive effect, the floor material must be kept pressed against the floor substrate for a long time until the adhesive force is exerted.

[0006] However, a practical device for holding such a pressing force at a flooring construction site has not yet been developed, so that it must be performed with insufficient pressing force and pressing time. Therefore, it is also difficult to prevent the bidding phenomenon as shown in FIG.

[0007]

SUMMARY OF THE INVENTION The present invention facilitates lateral movement of a flooring material at the time of actual fitting at the construction site of a sticking type flooring material and reduces the adhesive force between the flooring material and the floor substrate. An object of the present invention is to provide a floor material that can be improved and prevent a bidding phenomenon at both ends of the floor material after construction.

[0008]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, it has been found that, with the floor material and the construction method described below, the adhesive strength between the floor material and the floor substrate, especially the seam at both ends of the floor material. By sufficiently increasing the adhesive strength to the floor base in the vicinity, the bidding phenomenon was prevented, and the lateral movement of the floor material during construction was facilitated.

The structure of the sticking type flooring according to the present invention will be described with reference to FIG. A spacer (2) in which an independently foamed resin sheet (1) is attached to the entire back surface of the wooden flooring material, and an aluminum sheet (3) and an open-cell foamed resin (4) are further attached to both ends. Is affixed. A thermoplastic resin adhesive (5) such as a hot melt adhesive is impregnated inside and on the surface of the open-cell foamed resin of the spacer (2). A pressure-sensitive adhesive (6) mainly composed of a synthetic resin such as an acrylic resin or natural rubber is applied to the surface of the independent foamed resin sheet (1) where the spacer (2) is not attached. Although not shown in the drawings, a release paper for protecting the pressure-sensitive adhesive layer is usually applied to the surface of the pressure-sensitive adhesive until the time of construction. Next, a method for attaching the above-mentioned sticking type floor material to a floor base such as mortar or plywood will be described.

First, the first sheet is adhered to a predetermined position, and a floor material to be adjacent to the floor material is temporarily placed on the immediate side. Subsequently, the position of the temporarily placed floor material is determined by fitting the firstly adhered floor material and the temporarily placed floor material to each other. In this way, the positions of floor materials to be adjacent one after another are determined. FIG. 3 is a cross-sectional view showing the relationship between the floor material and the floor base material at that time. That is, since both ends of the flooring material are thicker than the center portion, there is a gap between the flooring material and the floor substrate when fitting the fruits of the adjacent flooring materials. In order to prevent contact between the material and the floor substrate, the adhesive force of the pressure-sensitive adhesive (6) on the back surface of the independent foamed resin sheet (1) is not exhibited. Further, since the adhesive impregnated in the spacer (2) is a thermoplastic resin adhesive, the adhesive force is not exhibited unless heated. Therefore, the temporarily placed floor material can be freely moved laterally, and actual fitting can be smoothly performed.

Next, a high-frequency magnetic field is generated by a high-frequency heater while applying a pressing force from the front surface of the floor material to the back surface at both end joints between the floor materials. The pressing force is sufficient for the installer's own weight. The aluminum sheet (3), which is a dielectric, generates heat by energy supplied from a magnetic field generated from the high-frequency heater. Due to the thermal energy generated on the back surface of the flooring material and the pressing force applied from the upper surface of the flooring material, the open-cell foamed resin (4) of the spacer (2) gradually contracts in volume, and the adhesive impregnated in the resin becomes Since it is activated by heat energy, it exerts a much stronger adhesive force than a pressure-sensitive adhesive that adheres only by pressing force.

Further, the softened and activated adhesive bonds the inner cavity walls of the voids which contained gas in the open-cell foaming resin (4). , Shrinks in volume and loses restoring force. As a result, there is almost no difference in thickness between the portion where the spacer (2) is not attached and the portion where the spacer (2) is attached. Therefore, the space between the portion where the spacer (2) is not stuck and the floor base is also eliminated, so that the portion where the spacer (2) is not stuck comes into contact with the floor base and the feeling applied to the surface of the independent foamed resin sheet (1). The pressure-sensitive adhesive (6) exhibits an adhesive force, and in addition to the buffering effect of the foamed resin sheet (1),
As in the conventional construction method, sufficient adhesive strength can be obtained with a relatively low pressing force due to the weight of the constructor.

If the length of the flooring material is longer than the width and thickness of the flooring material, and a portion of the back surface of the flooring material contacts the flooring material when the flooring material is temporarily placed on the flooring material, as shown in FIG. One or more spacers may be arranged in advance in portions other than both ends of the floor material.

The adhesive strength between the flooring material and the floor substrate is particularly high in the area where the spacer (2) is attached, the adhesive strength is increased by activating the adhesive, and the open-cell foamed resin is placed under the floor. The volume contracts while conforming to the shape of the uneven surface of the ground, so that the pressing force on the bonding surface is evenly applied. For this reason, a much stronger adhesive force than that of the above-described conventional technology is obtained, and warpage of the flooring material due to a change with time after construction can be prevented, thereby preventing a rise in the seam portion.

[0015]

The spacer (2) attached to the back of the flooring material
Has an effect of preventing the back surface of the floor material from contacting the floor substrate when the floor material is temporarily placed, and preventing the floor material from being adhered to the floor substrate at the temporary placement position. Due to the effect of the spacer (2), the floor material can be freely shifted when fitting the actual floor material adjacent to each other, and the actual fitting can be performed smoothly. After fitting the fruit and determining the position of the floor material, the aluminum sheet (3) of the spacer (2) generates heat by the energy supplied from the high frequency magnetic field generated by the high frequency heater. At the same time, the pressing force applied from above expels the gas in the open-cell foamed resin (4) and causes volume contraction. At the same time, the thermoplastic resin adhesive impregnated inside the open-cell foamed resin (4) receives heat supply from the heated aluminum sheet (3) to be softened and activated to exhibit an adhesive force.

As a result, the portion on which the spacer (2) is stuck has the cushioning effect of the independent foamed resin sheet (1) and the open-cell foamed resin (4), and the open-cell foamed resin (4) serves as a floor substrate. Since the volume shrinks while conforming to the uneven surface, the adhesive impregnated inside and on the open-cell foamed resin is softened and activated by heat, so that the floor material is adhered while being adapted to the uneven surface of the floor substrate. Therefore, the performance of the adhesive was sufficiently exhibited, a strong adhesive force could be obtained, and the advancing of the joint at the joint could be almost completely prevented.

The effects of the spacer (2) include the following. That is, the floor material can be freely moved laterally by the effect of the spacer (2). Therefore, as in the prior art, the adhesive applied to the back surface of the floor material has two contradictory factors of adhesive strength and lateral movement of the floor material. It is not necessary that the performance be balanced. Therefore, it is possible to use an adhesive having a high adhesive strength, which could not be used in the prior art, and to greatly improve the adhesive performance not only at both ends of the floor material to which the spacers are attached, but also at the intermediate portion. Can be.

[0018]

Next, the present invention will be described in more detail by way of examples, but the present invention is not limited to these examples.

EXAMPLE An independent foamed resin sheet (1) having a thickness of 2 mm and an expansion ratio of 10 was adhered to the entire back surface of a wooden flooring material having a thickness of 12 mm, a length of 1818 mm and a width of 303 mm. Further, only at both ends, an aluminum sheet (3) having a thickness of 0.05 mm, and an ethylene / vinyl acetate hot melt adhesive (trade name: Nymelt # 575, manufactured by Nitto Kasei Co., Ltd.)
And a spacer (2) formed by adhering a urethane-based open-cell resin having a thickness of 2 mm x a width of 50 mm x a length of 303 mm, and a foaming ratio of 30 times, impregnated with 0.5 g / cm3 on both the surface and the inside. . An acrylic resin-based adhesive (trade name: DF370, manufactured by Nitto Denko Corporation) that adheres well to the mortar is applied to the portion where the spacer is not attached, and is made to be in a semi-dry state. Wood was obtained. Note that a release paper for protecting the pressure-sensitive adhesive layer is stuck to the surface of the pressure-sensitive adhesive until the time of construction, but is omitted in the drawings.

[0036] 36 sticking type flooring materials thus obtained were stuck on a lanco so that there were 30 seams between 12 tatami mats. As for the method of sticking, first, it was temporarily placed on a mortar-finished floor substrate, and the fruits were sequentially fitted. After fitting all of the floor material, the constructor rides on the floor material and applies 45 weights toward the lower surface while applying the pressing force by the constructor's own weight and the high-frequency heater to the joint between the floor materials. A high frequency of ~ 46 kHz was emitted for about 1 minute.

One minute after the start of the high-frequency heating, the spacer (2) shrinks in volume due to the heating, and the ethylene-vinyl acetate hot melt adhesive impregnated therein melts and exhibits an adhesive force. The operation was stopped, and the portions other than the joints were pressed by the weight of the installer and adhered to the floor substrate. Six months after the construction, the auction of each joint was visually observed.
It was one place.

COMPARATIVE EXAMPLE An independent foamed resin sheet (1) having a thickness of 2 mm and an expansion ratio of 10 times was adhered to the entire back surface of a wooden flooring material having a thickness of 12 mm × length 1818 mm × width 303 mm. Acrylic resin adhesive (trade name: DF3)
70 (manufactured by Nitto Denko Corporation), and the coating was placed in a semi-dried state. A release paper was applied to protect the applied surface to obtain an adhesive floor material. 36 sheets of the sticking type flooring material thus obtained were peeled off from the release paper on the back surface, and ranco-bonded to the same mortar-finish flooring as in the example so as to provide 30 seams between 12 tatami mats in the same manner as in the example.

As for the method of sticking, first, the position of the first flooring material was determined, and the constructor stuck on the flooring material while riding on the flooring material and applying its own weight. Next, the actual floor material to be adjacent to the floor material was fitted, and the pieces were sequentially attached one by one while applying the weight of the constructor, and all the pieces were attached. Six months after the construction, the auction at each joint was visually observed, and it was found that the auction was found at 10 locations.

In the comparative example, only the buffer effect of the independent foamed resin sheet (1) attached to the back surface contributes to the conformity between the uneven surface of the mortar finish and the flooring material. Since no adaptation effect due to volume shrinkage of the resin can be expected at all, and the adhesive is not activated, sufficient adhesive strength cannot be obtained. Therefore, it was not possible to withstand the warpage of the flooring material due to a change with time after the construction, and the joints competed.

In the present invention, since the floor material and the floor substrate have a strong adhesive force particularly at the portion where the spacer (2) is attached, both ends due to a change with time after the construction, which are seen in the conventional construction method, are observed. The auction at the joint part was prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a bidding state in a joint portion at both ends of a floor material.

FIG. 2 is a cross-sectional view showing a relationship between a sticking type floor material and a floor substrate according to the present invention.

FIG. 3 is a cross-sectional view showing details of both ends of the adhesive flooring according to the present invention.

FIG. 4 is a sectional view of a spacer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Independent foam resin sheet 2 Spacer 3 Aluminum sheet 4 Open cell foam resin 5 Thermoplastic resin adhesive 6 Pressure sensitive adhesive

Claims (2)

(57) [Claims] 1. An independent foamed resin sheet (1) having a pressure-sensitive adhesive (6) applied to the surface thereof is attached to the back surface of a wooden flooring material,
Further, a spacer (2) made of an aluminum sheet (3) and an open-cell foamed resin (4) impregnated with a thermoplastic resin adhesive (5) on the inside and on the surface is attached to both ends of the floor material. Floor material. 2. An independent foamed resin sheet (1) having a pressure-sensitive adhesive (6) applied to the surface thereof is attached to the back surface of the wooden flooring material,
Further, aluminum sheets (3) are provided at both ends and an intermediate portion of the floor material.
A flooring material comprising a spacer (2) made of an open-cell foamed resin (4) impregnated with a thermoplastic resin adhesive (5) inside and on the surface thereof.