JPH06330612A - Adhesive floor material - Google Patents

Abstract

PURPOSE:To facilitate execution of work on an adhesive floor material and increase the adhesive force of both ends of a floor material and further, prevent the both ends of the floor material from their pushing up owing to a secular change after work execution. CONSTITUTION:An independently foamed resin sheet 1 on which a prssure- sensitive adhesive is applied is put on the back side of a wooden floor material. An spacers 2 composed of an aluminum sheet 3 and serially foamed resin 4 immersed in adhesive are arranged in turn on both ends. Accordingly, since the spacers 2 suppress the adhesive force of pressure-sensitive adhesive, the floor material can be easily transferred laterally. When both ends are over heated, by a high-freuency heater, a uniform and strong adhesive force can be exhibited by the synergetic effect of the adaptability to the rugged face of floor substrate due to the volumetric contraction of foamed resin in addition to the buffering effect of the serially foamed resin 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flooring material that can be reliably and efficiently attached to a floor substrate at a construction site.

[0002]

2. Description of the Related Art Conventionally, the following method has been used as a method for attaching a flooring material whose base material is a wood material to a floor base such as a mortar finish surface without the need to apply an adhesive at the construction site. Are known. That is, it is a method in which a floor material having a back surface coated with a pressure-sensitive adhesive 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 material.
The procedure for constructing such an adhesive flooring material is generally performed in the following order. First, the first first floor material is bonded to a predetermined place on the floor base, and the floor material to be adjacent to the bonded floor material is temporarily placed on the immediate side of the first floor material. Next, shift the temporarily placed floor material in the lateral direction and fit the first bonded floor material to each other,
Determine the position of the temporarily placed floor material. When the position of the floor material is determined, a pressing force is applied from above to bond it to the floor base.

In the above-mentioned conventional method, the pressure-sensitive adhesive applied to the back surface of the floor material in advance has to be semi-dried.
It is difficult to give fluidity to the adhesive, and when the floor material is temporarily placed, the adhesive force is immediately exerted, the lateral movement of the floor material becomes impossible, and proper fitting cannot be achieved. Therefore, the pressure-sensitive adhesive to be applied to the back surface of such an adhesive flooring material must use a performance that balances the two contradictory factors of lateral movement and adhesive force of the flooring material during construction. . Therefore, as a matter of course, if the adhesive force is increased, the work becomes difficult, and if the adhesive force is increased, the adhesive force must be reduced.

In the case of a wooden floor material, after the construction, the back surface absorbs moisture from the floor base material, so that an expansion stress is generated by the expansion of the wood base material, and conversely water is taken away from the surface, so that a contraction tensile stress is generated. Therefore, it tends to warp in a U shape.
Therefore, in order to improve the construction efficiency, if you use an adhesive that can easily move the floor material laterally, the adhesive strength with the floor base is weak, so due to the aging after construction, near the seam at both ends, as shown in Fig. 1. In addition, a phenomenon of bidding up occurs, which not only impairs the aesthetic appearance but also deteriorates the walking feeling.

In order to solve these problems, as an improved technique, a method of forming a film of a liquid agent on the adhesive layer to temporarily stop the adhesive force of the adhesive has been disclosed (Japanese Patent Laid-Open No. HEI-2). -20760). However, in this method, since the film of the liquid agent suppresses the adhesive force of the adhesive, after the mating of the fruits and the pressing force is applied, the film of the liquid agent is adhered until it is absorbed or volatilized. Since the force is not exerted, it should take longer to exert the adhesive force than the conventional method. Therefore, in order to obtain a sufficient adhesive effect, the floor material must be pressed against the floor base for a long time until the adhesive force is exerted.

However, at the floor material construction site, a practical device for holding such a pressing force has not yet been developed, and therefore the pressing force and the pressing time have to be applied with insufficient pressure. Therefore, it is difficult to prevent the bidding phenomenon as shown in FIG. 1 due to the change over time after construction.

[0007]

DISCLOSURE OF THE INVENTION The present invention facilitates lateral movement of a floor material at the time of actual mating at the construction site of the adhesive floor material, and improves the adhesive force between the floor material and the floor base. It is intended to supply a floor material which is improved and can prevent the bidding phenomenon of both ends of the floor material after construction.

[0008]

[Means for Solving the Problems] As a result of earnest research to solve the above problems, as a result of the following floor material and its construction method, the adhesive force between the floor material and the floor base, especially the joints at both ends of the floor material By sufficiently strengthening the adhesive strength with the floor base in the vicinity, the bidding phenomenon was prevented and the floor material was easily moved laterally during construction.

The structure of the adhesive floor covering according to the present invention will be described with reference to FIG. A spacer (2) formed by attaching an independently foamed resin sheet (1) to the entire back surface of the wooden flooring material, and further attaching an aluminum sheet (3) and an open-cell foam resin (4) 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 foam resin of the spacer (2). A pressure sensitive adhesive (6) containing a synthetic resin such as acrylic resin or natural rubber as a main component 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 attached to the surface of the pressure-sensitive adhesive until the time of construction. A method of attaching the above-mentioned adhesive floor material to a floor base such as mortar or plywood will be described below.

First, the first sheet is adhered to a predetermined position, and a floor material which should be adjacent to the floor material is temporarily placed on the immediate side thereof. Next, the position of the temporarily placed floor material is determined by fitting the first bonded floor material and the temporarily placed fruit of the floor material to each other. In this way, the positions of the floor materials that should be adjacent to each other are determined one after another. 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 floor material are thicker than the central portion, there is a gap between the floor material and the floor base when fitting the fruits of the adjacent floor materials. The pressure-sensitive adhesive (6) on the back surface of the independent foamed resin sheet (1) does not exhibit the adhesive force in order to prevent contact between the material and the floor base. Further, the adhesive impregnated in the spacer (2) is a thermoplastic resin adhesive, so that the adhesive force is not exhibited unless it is heated. Therefore, the temporarily placed floor material can be freely laterally moved, 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 to the back surface of the floor material at the seams at both ends of the floor materials. The pressing force is sufficient due to the weight of the builder. The aluminum sheet (3), which is a dielectric, generates heat by the energy supplied from the magnetic field generated from the high frequency heater. Due to the thermal energy generated on the back surface of the floor material and the pressing force applied from the top surface of the floor material, the open-cell foam resin (4) of the spacer (2) gradually shrinks in volume, and the adhesive impregnated in the resin is 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 adheres the walls of the cavity of the void containing the gas in the open-cell foam resin (4). , The volume shrinks and the restoring force is lost. 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, there is no space between the part without the spacer (2) and the floor substrate, so that the part without the spacer (2) comes into contact with the floor substrate and the feeling of being applied to the surface of the independent foamed resin sheet (1). The pressure-sensitive adhesive (6) exerts an adhesive force, and in combination with the cushioning effect of the foamed resin sheet (1),
Similar to the conventional construction method, sufficient adhesive force can be obtained with a relatively low pressing force due to the weight of the builder.

When the length of the floor material is longer than the width and thickness of the floor material and a part of the back surface of the floor material comes into contact with the floor material when the floor material is temporarily placed on the floor material, as shown in FIG. One or a plurality of spacers may be arranged in advance on the portions other than both ends of the floor material.

Regarding the adhesive force between the floor material and the floor base, particularly in the portion where the spacer (2) is adhered, the adhesive force is enhanced by the activation of the adhesive, and the open-cell foam resin is used under the floor. According to the shape of the uneven surface of the ground, the volume shrinks while conforming to the shape, so that the pressing force on the adhesive surface is evenly applied. Therefore, a much stronger adhesive force than that of the above-mentioned conventional technique can be obtained, and it is possible to prevent the bidding of the seam portion against the warpage of the flooring material due to the change with time after the construction.

[0015]

EFFECTS OF THE INVENTION Spacers (2) attached to the back surface of the floor material
Has an effect of preventing the back surface of the floor material from coming into contact with the floor base material when the floor material is temporarily placed and adhering the floor material to the floor base material at the temporary placement position. Due to the effect of the spacer (2), when fitting the fruits of the adjacent floor materials, the floor materials can be freely displaced, and the actual fitting can be smoothly performed. 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 causes the gas in the open-cell foam resin (4) to be discharged, causing volume contraction. At the same time, the thermoplastic resin adhesive impregnated inside the open-cell foam resin (4) receives heat from the heat-generating aluminum sheet (3) to be softened and activated to exert an adhesive force.

As a result, in the portion where the spacer (2) is attached, in addition to the buffering effect of the independent foamed resin sheet (1) and the open-cell foamed resin (4), the open-celled foamed resin (4) serves as a floor substrate. The volume shrinks while conforming to the uneven surface, and the adhesive that has been impregnated inside and on the surface of the open-cell foam resin is softened and activated by heat, so the floor material is adhered while conforming to the uneven surface of the floor base. Therefore, the performance of the adhesive was sufficiently exerted, a strong adhesive force was able to be obtained, and the bidding of the joint portion could be almost completely prevented.

The effects of the spacer (2) are also as follows. That is, since the floor material can be freely laterally moved by the effect of the spacer (2), the adhesive applied on the back surface of the floor material has two contradictory elements, that is, adhesive force and lateral movement of the floor material, as in the prior art. It is not necessary for the performance to be balanced. Therefore, it becomes possible to use adhesives with high adhesive strength that could not be used in the prior art, and it is possible to significantly improve the adhesive performance not only at the both ends of the flooring to which the spacers are stuck but also at the middle part. it can.

[0018]

EXAMPLES The present invention will now be described in more detail by way of examples, which should not be construed as limiting the invention thereto.

EXAMPLE An independent foamed resin sheet (1) having a thickness of 2 mm and a foaming ratio of 10 times was attached to the entire back surface of a wood flooring having a thickness of 12 mm, a length of 1818 mm, and a width of 303 mm. Furthermore, an aluminum sheet (3) with a thickness of 0.05 mm is provided only on both ends, and an ethylene / vinyl acetate-based hot melt adhesive (trade name: Nimelt # 575, manufactured by Nitto Kasei Co., Ltd.) on the inside and on the surface.
A spacer (2) formed by adhering a urethane-based open-cell resin having a thickness of 2 mm, a width of 50 mm, and a length of 303 mm and a foaming ratio of 30 times, which is impregnated on both the surface and inside with 0.5 g / cm3, is adhered. . An acrylic resin adhesive (product name: DF370, manufactured by Nitto Denko Co., Ltd.), which has good adhesion to the mortar, is applied to the part where the spacer is not applied, and the adhesive floor shown in FIG. I got the material. A release paper for protecting the pressure-sensitive adhesive layer is attached to the surface of the pressure-sensitive adhesive until the time of construction, but it is omitted in the drawings.

The thirty-six adhesive flooring materials obtained in this manner were stuck on a 12-mat tatami mat so that there were 30 seams. As for the method of sticking, first, it was temporarily placed on a mortar-finished floor base, and the fruits were successively fitted. After fitting all the fruits of the flooring material, the installer rides on the flooring material, applying the pressing force of the installer's own weight and the high frequency heater to the joint between the flooring materials, and the A high frequency of ~ 46 kHz was emitted for about 1 minute.

One minute after the start of high-frequency heating, the spacer (2) contracted in volume by heating, and the ethylene / vinyl acetate-based hot-melt adhesive impregnated inside melted to exert the adhesive force. The operation was stopped, and the parts other than the seam were pressed by the weight of the builder to bond them to the floor base. After 6 months of construction, when the auction of each joint was visually observed, it was confirmed that the auction was successful.
It was one place.

Comparative Example A 12 mm thick × 1818 mm long × 303 mm wide wood flooring was adhered to the entire back surface of an independent foamed resin sheet (1) having a thickness of 2 mm and a foaming ratio of 10 times, and further the independent foamed resin sheet. Acrylic resin adhesive (trade name: DF3
70, manufactured by Nitto Denko Co., Ltd.) to be a semi-dried state, and a release paper was attached to protect the coated surface to obtain an adhesive flooring. The 36 pieces of the adhesive flooring material thus obtained were peeled off from the release paper on the back side, and were stuck to the floor base of the same mortar finish as in the example in the same manner as in the example so that there were 30 seams between 12 tatami mats.

As for the method of sticking, first, the position of the first floor material was determined, and the builder puts it on the floor material and puts it on the floor base while applying its own weight. Next, the fruits of the flooring material to be adjacent to the flooring material were fitted, and the pieces were sequentially attached one by one while applying the own weight of the builder, and the whole number was attached. After 6 months from the construction, the auction of each joint was visually observed, and the auction was found at 10 points.

In the comparative example, it is only the cushioning effect of the independent foamed resin sheet (1) attached to the back surface that contributes to the familiarity between the uneven surface of the mortar finish and the flooring material, and the foaming as in the example is performed. Since the familiar effect due to the volume shrinkage of the resin cannot be expected and the adhesive is not activated, sufficient adhesive force cannot be obtained. Therefore, the warp of the flooring material due to the change with time after the construction could not be resisted, and the seam portion was tended up.

In the present invention, since the floor material and the floor base have a particularly strong adhesive force at the portion where the spacer (2) is adhered, both ends due to a change with time after the construction, which is seen in the conventional construction method. It was possible to prevent the auction of the seams.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a bid state at a seam portion at both ends of a floor material.

FIG. 2 is a cross-sectional view showing the relationship between the adhesive flooring material and the floor base according to the present invention.

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

FIG. 4 is a sectional view of a spacer.

[Explanation of symbols]

 1 Independent foamed resin sheet 2 Spacer 3 Aluminum sheet 4 Continuous foamed resin 5 Thermoplastic resin adhesive 6 Pressure-sensitive adhesive

Claims (2)

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