JP2000119609A - Double-sided adhesive tape for fixing floor material and floor construction method using the same - Google Patents

Abstract

(57) [Summary] [Problem] To provide a double-sided pressure-sensitive adhesive tape for fixing flooring and a flooring method using the flooring, which suppresses expansion / shrinkage / warpage of the flooring in a practical environment and enables a beautifully finished flooring. provide. SOLUTION: This double-sided pressure-sensitive adhesive tape for fixing a flooring material, comprising a foam sheet as a base material, wherein the pressure-sensitive adhesive laminated on at least one surface of the foam sheet base material has a viscoelastic spectrum in a shear direction at a measurement frequency of 10 Hz. Storage elastic modulus at 100 ° C. is 0.3 × 10 ^{5 to} 1.0
A double-sided pressure-sensitive adhesive tape for fixing floor material, characterized by a pressure of × 10 ⁵ Pa, and a floor construction method using the same.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided pressure-sensitive adhesive tape for fixing flooring materials and a floor construction method using the same.

[0002]

2. Description of the Related Art Conventionally, when laying floor materials of a building on floor base materials such as joists, discarded plywood, vibration damping materials, mortar, concrete, etc., an adhesive is entirely or partially applied to these laying surfaces. In general, a method of applying a floor nail to a salon portion and then fixing the same in sequence is generally adopted. However, the above-mentioned construction method involves deterioration of the working environment and the risk of fire due to the organic solvent, and further causes warpage and partial peeling of the flooring due to insufficient adhesive force due to uneven coating. Could cause floor noise on the constructed floor.

In the above-mentioned construction method using an adhesive, not only time is required for an open time and work efficiency is reduced, but also it is necessary to change the setting of the open time according to circumstances depending on environmental conditions such as summer and winter. In addition, the management of the work process was complicated. In addition, the time required for the adhesive to exhibit the required strength, the floor material must be pressed and cured so as not to float or warp.If these steps are neglected, floor noise may be caused by the same reason as above. There was a risk of becoming. In particular, when an emulsion adhesive is used, the extent to which the water component of the adhesive soaks into the floor material and expands or expands the floor material becomes large. However, there is a problem such as the occurrence of cracks.

As an attempt to solve these problems, there is a floor construction method using a double-sided pressure-sensitive adhesive tape. In the construction step, first, the release paper of one pressure-sensitive adhesive layer of the double-sided pressure-sensitive adhesive tape is peeled off and the floor is laid. When sticking to the surface of the flooring material and then laying the floor material together, the floor material is bonded to the floor base material surface while peeling off the release paper of the other adhesive layer. When laying together the seeds of the material,
The other pressure-sensitive adhesive layer of the double-sided pressure-sensitive adhesive tape may come in contact with the back surface of the flooring material, and once it comes into contact, it takes time and effort to peel it off, making it difficult to remove the flooring material again. Met.

On the other hand, Japanese Patent Publication No. Hei 7-122329 discloses a floor board which solves the problem of the double-sided adhesive tape in that it is difficult to remove the once adhered floor material for the purpose of correcting the position. The construction method is disclosed, specifically, laminating a double-sided adhesive tape with a width longer than the floorboard to be laminated on the floor base material surface, and laminating the folded release paper on the adhesive surface. After the floor plate is laminated on the release paper and the position thereof is adjusted, the folded portion of the release paper is sequentially pulled out.

However, in the method of constructing a floorboard described in the above publication, the release paper to be peeled comes into contact with the back surface of the flooring material, and it may be difficult to pull out the paper. Sometimes occurred. In addition, since there is no description about the double-sided pressure-sensitive adhesive tape or pressure-sensitive adhesive suitable for the floor construction method in the detailed description and Examples of the above publication, as conventionally used, for example, carpets and other rugs It is considered that a double-sided adhesive tape for fixing such as was used.

However, conventionally known double-sided adhesive tapes which have been used for fixing rugs such as carpets can be used for temporary fixing of floor materials such as positioning of floor materials at the time of floor construction. Therefore, it has been difficult to firmly fix the floor material on the floor base material for a long time without fear of floor noise. Incidentally, even with a conventional general-purpose acrylic pressure-sensitive adhesive excellent in balance between initial tack and adhesive strength, the storage viscoelastic modulus at 100 ° C. described later is 0.01 × 10 ^5.
It is evaluated as being too soft to firmly fix a floor material consisting only of plywood having a large expansion and contraction rate on a floor base material for a long time without fear of floor noise, especially as small as about 0.2 × 10 ⁵ Pa. Was something.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned facts, and has as its object to suppress expansion and shrinkage and warpage of a flooring material in a practical environment and provide a beautifully finished floor. An object of the present invention is to provide a double-sided pressure-sensitive adhesive tape for fixing a floor material that can be constructed and a floor construction method using the same.

The inventor of the present invention intends to solve the above-mentioned problems by optimizing the physical properties of the pressure-sensitive adhesive for fixing the floor material, and to expand and contract the electric carpet, the direct sunlight, and the floor material generated during the dry season in winter. Investigating the physical properties of the pressure-sensitive adhesive for binding, it was found that the pressure-sensitive adhesive whose storage elastic modulus at 100 ° C is within a certain range can firmly fix the flooring without fear of floor noise. Thus, the present invention has been completed.

[0010]

The double-sided pressure-sensitive adhesive tape for fixing flooring material according to the present invention is a double-sided pressure-sensitive adhesive tape for fixing flooring material based on a foam sheet. The pressure-sensitive adhesive laminated on at least one side has a storage elastic modulus at 100 ° C. of 0.3 × 1 measured by a viscoelastic spectrum in a shear direction at a measurement frequency of 10 Hz.
0 ^{5 to} 1.0 × 10 ⁵ Pa.

The foam sheet used as a substrate in the present invention is not particularly limited, but examples thereof include olefin resin foam sheets such as polyethylene and polypropylene, and urethane resin foam sheets. These foam sheets may be composed of closed-cell foams, may be composed of open-cell foams, or may be composed of semi-closed-cell foams having an intermediate structure between them. There may be. Also, the foam sheet shows the degree of flexibility from hard to soft due to the cell structure,
Above all, a foam sheet commonly called soft or semi-rigid is preferably used.

The thickness of the foam sheet is determined by the properties of the floor material on which the floor material is laid, the use of the floor portion of the building, and the like. Required adhesive strength may not be developed depending on land,
If it is too thick, it is difficult to measure the dimensions of the construction floor, the dimensions are likely to be out of order, and there is a possibility of causing inconveniences such as an increase in the floor height. Therefore, the thickness is preferably about 0.3 to 2 mm.

The pressure-sensitive adhesive layer laminated on at least one surface of the foam sheet has a storage elastic modulus at 100 ° C. of 0.3 × 10 ^{5 to} 1.0 measured by a viscoelastic spectrum in a shear direction at a measurement frequency of 10 Hz. × 10 ⁵ Pa
If so, the main rubber component of the pressure-sensitive adhesive is not particularly limited, and examples thereof include a natural rubber-based pressure-sensitive adhesive, a synthetic rubber-based pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive, and a silicone-based pressure-sensitive adhesive. Above all, an acrylic pressure-sensitive adhesive is preferably used from the viewpoint of excellent cost performance, durability, and stain resistance. These pressure-sensitive adhesives are adjusted to physical properties in the above-mentioned storage modulus and loss modulus by using a crosslinking agent as required.

The acrylic pressure-sensitive adhesive polymer as a main component of the acrylic pressure-sensitive adhesive includes, for example, an alkyl (meth) acrylate such as butyl acrylate or 2-ethylhexyl acrylate as a main component, and if necessary, (meth) acrylic. Acid, carboxyl group-containing vinyl monomer such as maleic acid, styrene, vinyl acetate, glycidyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, ε- (poly) caprolactone (meth) acrylate, tetrahydrofuranyl (meth) acrylate,
Ethylene, propylene, butylene, butadiene, acrylonitrile, 2-dimethylaminoethyl (meth) acrylate, (meth) acrylamide, urethane (meth) acrylate, N-vinylpyrrolidone, N-vinyloxazoline, 2-vinylpyridine, 4-vinylpyridine ,
Examples thereof include those obtained by copolymerizing a polar group-containing vinyl monomer such as (meth) acryloyl morpholine, 2- (meth) acryloyl acid phosphate, and sodium vinyl sulfonate.

The acrylic pressure-sensitive adhesive polymer suitable for the pressure-sensitive adhesive layer used in the present invention includes, for example, those having butyl acrylate as a main component and copolymerizing acrylic acid in an amount of 12 parts by weight or less. The molecular weight is preferably 500,000 or more to maintain the storage modulus at high temperatures.

These adhesive polymers may be cross-linked using a cross-linking agent.
Isocyanate-based crosslinking agents, aziridine-based crosslinking agents, metal complex compounds, and the like can be used.

The storage elastic modulus is 1 mm × 5 sample size.
A pressure-sensitive adhesive layer prepared in a size of 5 mm × 5 mm is coated with a viscoelastic spectrometer (trade name “DVA-
200 ”), frequency 10 Hz, measurement temperature range −
40-120 ° C, heating rate 3 ° C / min, data acquisition interval 3
It was measured at ° C.

The viscoelastic properties of the pressure-sensitive adhesive are as follows: Maxwell
It shows the mechanical properties of a pressure-sensitive adhesive represented by a composite of elasticity (spring) and viscosity (dashpot) as described in the l model and the like. This characteristic shows the storage elastic modulus E 'and the loss elastic modulus E "
Is obtained. The storage elastic modulus E ′ indicates a stress depending on the displacement of the tensile force, and is mainly used as an index such as the hardness of the pressure-sensitive adhesive and the resistance (cohesion) to a long-time stress. On the other hand, the loss elastic modulus E ″ indicates a stress depending on the speed of the tensile force, and shows a property of dissipating and relaxing as heat over time. It is an index of such as.

In order to fix a material that gradually expands and contracts over a long period of time, such as a flooring material, to an adherend such as a flooring material, the cohesive force component of the adhesive prevents the expansion and contraction of the material. There is a need to. Therefore, it is considered that the storage elastic modulus is appropriate as a parameter indicating the resistance to the elastic deformation. Also, when considering long-term resistance,
Applying the general theory that the response at low frequency and the response at high temperature in dynamic viscoelasticity show the same behavior, the results of diligent studies show that the storage elastic modulus at 100 ° C correlates with the floor material constraint. I came to find out.

In the case of a commonly used urethane-based adhesive, the floor material can be brought into close contact with the floor base material via the urethane-based adhesive layer at an uncured stage, and is cured for a certain period of time while being pressed and fixed. The adhesive layer having a high modulus of elasticity can be obtained and the deformation or movement of the floor material can be suppressed, but the pressure-sensitive adhesive layer is generally used as a curable adhesive layer. A high elastic modulus cannot be obtained, and the elastic modulus also changes due to a change in environmental temperature, and it is possible to suppress the deformation or movement of the flooring, including in an abnormal environment as described above. I can't say.

When the storage elastic modulus at 100 ° C. measured by a viscoelastic spectrum in a shear direction at a measurement frequency of 10 Hz is less than 0.3 × 10 ⁵ Pa, the pressure-sensitive adhesive layer is greatly deformed and the floor material is deformed or moved. When the pressure exceeds 1.0 × 10 ⁵ Pa, the floor material cannot be brought into close contact with the floor base material, and the required adhesive strength cannot be exhibited.

The thickness of the pressure-sensitive adhesive layer is determined according to the properties of the floor base material on which the floor material is laid, the use of the floor portion of the building, and the like, and is not particularly limited. If it is too thin, the required adhesive strength may not be exhibited when the adherend surface is rough, and if it is too thick, the absolute strain deformation increases, and it becomes impossible to suppress the expansion and contraction of the flooring material. , About 60 to 100 μm.

The means for providing the pressure-sensitive adhesive layer on at least one surface of the base foam sheet is not particularly limited. For example, the pressure-sensitive adhesive layer may be applied directly on the foam sheet surface. Alternatively, an adhesive layer separately provided may be transferred and laminated on the foam sheet surface by a transfer method. The coating method including the transfer method is not particularly limited, and examples thereof include a coating method using various coating apparatuses such as a bar coater, a roll coater, a comma coater, a spray coater, and a dipping coater.

It is preferable that a release paper is temporarily attached to the surface of the pressure-sensitive adhesive layer to protect the pressure-sensitive adhesive layer during storage. As the release paper, for example, a basis weight of 50 to 150 g
/ M ² or about 70-150 μm thick kraft paper, semi-bleached paper, woodfree paper, glassine paper, etc. as a base material. And the like, which have been subjected to a release treatment with a release agent.

[0025] In the present invention, the flooring refers to a plate-like body having a moderate rigidity laid on the flooring material, and examples thereof include flooring materials such as flooring specified by Japanese Agricultural Standards. The material is not limited to the wood-based material, but includes all the plate-like materials similar to the flooring made of metal, plastic, fiber, and a composite thereof.

The double-sided pressure-sensitive adhesive tape for fixing flooring material according to the second aspect of the present invention is the double-sided pressure-sensitive adhesive tape for fixing flooring material according to the first aspect, wherein the pressure-sensitive adhesive layer is formed by elastic deformation of the base foam sheet during pressure bonding. A non-adhesive or lightly-adhesive masking member configured such that its surface or its outer surface can be located inside the surface, so as to protrude from the surface of the adhesive layer, and at least one of the adhesive layers The surface is uniformly and partially coated.

The term "small adhesiveness" as used in the present invention means that the adhesive layer of the double-sided adhesive tape for fixing flooring according to the first aspect of the present invention is contacted with the pressure-sensitive adhesive layer and then finely adjusted the laying position of the flooring. The adhesive property of the surface of the agent layer and the non-adhesive or slightly sticky refers to the degree of adhesiveness that can be removed again without substantially reducing the masking performance of the masking member surface,
Depending on the adhesiveness of the adhesive layer that comes in contact, it fluctuates slightly,
For example, it means that the adhesive strength to a stainless steel plate or the adhesive strength to concrete is about 200 g / 25 mm or less.

The material of the non-sticky or slightly sticky masking member used in the present invention is not particularly limited, and any material such as natural or synthetic fiber, synthetic resin, and metal can be used. For example,
Examples include meshes and nets made of gauze, polyethylene, polypropylene, polyethylene terephthalate, and the like, woven fabrics such as natural or synthetic fibers, nonwoven fabrics made of polyethylene, polypropylene, polyester fibers, and the like, metal meshes, and molded nets. To these materials, for example, a releasable substance such as polyethyleneimine is added, or a release agent containing these releasable substances is coated on the surface. Polymer (E
VA), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-butadiene-styrene block copolymer (SEBS), etc.
Alternatively, the surface tackiness may be adjusted by, for example, applying a slight tackifier containing these tackifiers to the surface.

The thickness of the non-tacky or slightly tacky masking member is compressed within the range of elastic deformation of the base foam sheet during pressure bonding, and the outer surface of these masking members becomes the surface of the pressure-sensitive adhesive layer or It is not particularly limited as long as it can be located inside the surface, but is preferably thinner as long as the masking performance can be achieved.For example, a molding net made of a thermoplastic resin is used as a masking member. In this case, it is about 300 μm or less.

The ratio of the area of the non-adhesive or slightly adhesive masking member covering the adhesive layer to the area of the entire surface of the adhesive layer, that is, the coverage is preferably 5 to 60%. If the coverage is less than 5%, the surface of the pressure-sensitive adhesive layer tends to stick to the surface of the adherend (floor material or floor base material) when adjusting the position of the floor material during floor construction, and re-peeling for position adjustment may occur. If it exceeds 60%, it is easy to adjust the position until the final bonding of the flooring material, but the flooring material cannot be firmly bonded to the floor base material, causing inconvenience such as floor noise. May be caused.

To uniformly and partially cover the surface of the pressure-sensitive adhesive layer with the non-adhesive or light-adhesive masking member means that the two surfaces of the pressure-sensitive adhesive layer and the non-adhesive or light-adhesive masking member are different on one surface. Since the faces are mixed,
It is impossible to have complete uniformity from the beginning, and it does not only mean that it has mere regularity, but the surface of the non-adhesive or slightly adhesive masking member is the adhesive of the double-sided adhesive tape for fixing flooring material It means that it is dispersed as uniformly as possible on the entire surface of the layer, and the way of dispersion may be coated with regularity such as stripes, lattices, polka dots, etc. Even if it is coated without regularity, such as an irregular pattern, it is sufficient that it is coated as uniformly dispersed as possible.

If the form of the coating of the surface of the pressure-sensitive adhesive layer with the non-sticky or slightly sticky masking member is shown using a plain woven cloth of high-density polyethylene flat yarn, the thickness of the yarn is 10 μm and the width of the yarn is 0.5-5
mm, the yarn weave interval is about 1 to 10 mm. This is because, as is clear from the examples described later, by setting the width, weaving interval and thickness of the yarn to the specific ranges described above, sufficient removability and adhesiveness after pressing can be obtained. is there.

According to a third aspect of the present invention, there is provided the floor construction method, wherein the double-sided pressure-sensitive adhesive tape for fixing the floor material according to the first or second aspect is attached to the back surface of the floor material or the surface of the floor material, and the floor is placed on the floor material. The method is characterized in that the material is adjusted in position and laid, and the floor material is pressed against the surface of the floor base material to press the double-sided adhesive tape for fixing the floor material.

In the floor construction method of the present invention, a double-sided adhesive tape for fixing a floor material is used when the floor material is adhered and fixed to a base material of the floor. Double-sided adhesive tape for fixing flooring related to
After sticking to the back surface of the floor material so that the non-adhesive or slightly adhesive masking member is exposed to the outside, a method of laying the floor material on the floor base material, a double-sided adhesive tape for fixing the floor material according to the present invention, Any method may be adopted, in which the non-adhesive or slightly adhesive masking member is first adhered to the floor base material surface so as to be exposed to the outside, and then the floor material is laid on the floor base material. Good.

The mode of attaching the double-sided pressure-sensitive adhesive tape for fixing the floor material to the back surface of the floor material or the surface of the floor base material is not particularly limited, either. For example, instead of applying the entire surface, it is also possible to apply a partial application such as a stripe application with an interval.

Hereinafter, the floor construction method of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a partially cutaway perspective view showing one stage of the above-described floor base material surface pre-adhering method, FIG. 2 is a cross-sectional view taken along line II-II of FIG.
3 is a cross-sectional view at the same position as in FIG. 2 at the stage when floor construction is completed.

In FIG. 1, reference numeral 1 denotes a double-sided pressure-sensitive adhesive tape for fixing a floor material adhered on a floor base material 2, 11 denotes an adhesive layer, and 12 denotes a pressure-sensitive adhesive layer provided so as to protrude from the surface of the adhesive layer 11. Non-sticky or slightly sticky masking member. The flooring material 3 is placed on the double-sided adhesive tape 1 for fixing the flooring material adhered to the surface of the flooring base material 2 while sequentially joining the flooring material from the rear wall surface 4 to the near side, and the positioning of each flooring material 3 is performed. Is shown. At this time, a large load is not applied to the exposed double-sided pressure-sensitive adhesive tape 1 for fixing the floor material, the non-adhesive or slightly-adhesive masking member enters the pressure-sensitive adhesive layer, and the floor material 3 is positioned before positioning. This is performed so as not to be fixed to the floor base material 2 surface.

In FIG. 2, the floor material 3 placed on the floor material fixing double-sided pressure-sensitive adhesive tape 1 projects from the surface of the pressure-sensitive adhesive layer 11 on the floor material 3 side of the floor material-fixing double-sided pressure-sensitive adhesive tape 1. Supported by an adhesive or slightly adhesive masking member 12,
The back surface of the flooring material 3 can be positioned without substantially contacting the pressure-sensitive adhesive layer 11 by the small spaces a, a, a,. Is shown. In fact, during this operation, replacement of the defective floor material 3 and fine adjustment of the laying position of the floor material 3 can be easily performed. In addition, 13 is a base material foam sheet of the double-sided adhesive tape 1 for fixing a floor material.

FIG. 3 shows that the positioning operation of the floor material 3 shown in FIGS. 1 and 2 is completed, and the floor material 3 is pressed against the surface of the floor base material 2 by means such as stepping on the surface thereof, and the floor material 3 is located therebetween. By sandwiching the double-sided adhesive tape 1 for fixing the floor material, the base foam sheet 13 is elastically deformed, and the surface of the adhesive layer 11 on the floor material 3 side is non-adhesive or slightly adhesive.
The space a, a, a ... between the two rises, and the non-adhesive or slightly adhesive masking member 12 that has been pressed against the back surface of the floor material 3 and protruded from the surface of the adhesive layer 11 becomes an adhesive layer. 11, the floor material 3 is firmly adhered to the surface of the floor base material 2 at the same level as the surface of the adhesive layer 11, and the floor construction work is completed.

As described above, the double-sided pressure-sensitive adhesive tape for fixing floor materials according to the first aspect has a storage elastic modulus and a loss elastic modulus at 100 ° C. of 0. 0. 3 × 10 ⁵ ~
Since it is formed by laminating the pressure-sensitive adhesive layer of 1.0 × 10 ⁵ Pa, there is no danger of work environment deterioration or fire danger due to organic solvent during floor construction, and uneven application of adhesive and pressure-sensitive adhesive There is no warping or partial peeling of the flooring material due to insufficient adhesive strength of the floor, and therefore, a beautiful floor finish can be achieved without troubles such as floor noise after the construction.

As described above, the double-sided pressure-sensitive adhesive tape for fixing a floor material according to the second aspect is the same as the double-sided pressure-sensitive adhesive tape for fixing a floor material according to the first aspect, which is formed by elastic deformation of the base foam sheet during pressure bonding. A non-adhesive or slightly adhesive masking member configured such that the outer surface can be located on the surface of the pressure-sensitive adhesive layer or inside the surface, so as to protrude from the surface of the pressure-sensitive adhesive layer, at least one of the Since the surface of the adhesive layer is evenly and partially coated, the floor material once placed on the floor base material via the double-sided adhesive tape for fixing the floor material is replaced or adjusted during floor construction. It can be easily re-peeled without deteriorating the adhesive properties of the adhesive layer and the masking performance of the masking member, and also presses the laid floor material against the floor base material surface to fix the floor material Double-sided adhesive tape By pressing, there is no warping or partial peeling of the floor material and it can be firmly adhered to the floor base material surface, so beautiful floor finish is possible without problems such as floor noise after construction Things.

According to the third aspect of the present invention, as set forth above, the floor construction method according to the first or second aspect is provided on the back surface of the floor material or the surface of the floor base material.
Adhere the double-sided adhesive tape for fixing the floor material described above, adjust the position of the floor material on the floor base material, lay it, press the floor material against the floor base material surface, and sandwich the double-sided adhesive tape for floor material fixing. The floor work is placed in the order of laying the floor material on the floor base material, and the floor construction work is carried out efficiently with very high workability until almost positioning, without being aware of the presence of the adhesive layer. Can,
The floor material at the positioned position can be firmly adhered by simply pressing the floor material surface and pressing the double-sided adhesive tape for floor material fixing, so a beautiful floor finish can be done, Since there is no trouble such as floor noise, and the floor construction efficiency is good, low-cost construction is possible.

[0043]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail by giving specific examples of the present invention.

(Example 1 and Comparative Examples 1 and 2) The monomer composition shown in Table 1 was used, and the weight average molecular weight and 100 ° C.
An adhesive mainly comprising an acrylic adhesive polymer having a storage elastic modulus according to above is applied on a 38 μm-thick polyethylene terephthalate film that has been release-treated using a comma coater so that the thickness after drying becomes 75 μm. Then 12
It was dried at a temperature of 0 ° C. for 5 minutes to form an adhesive layer. Next, the obtained pressure-sensitive adhesive layer was coated with an olefin-based resin foam sheet (trade name “Softlon # 100” manufactured by Sekisui Chemical Co., Ltd.).
1 ", foaming ratio: 10 times, thickness: 1.0 mm) were laminated on both sides by a transfer method to obtain a double-sided pressure-sensitive adhesive tape.

Further, after the above double-sided pressure-sensitive adhesive tape was cured at 40 ° C. for 2 days, an olefin-based resin flat yarn (trade name “Sof NA33”, manufactured by Sekisui Chemical Co., Ltd .; (1.5 mm, lattice spacing 7.0 mm, intersection thickness 60 μm, aperture ratio 67%)
The surface of the pressure-sensitive adhesive layer is evenly and partially coated at a coverage of 33%, and release paper (trade name “WHT80”, manufactured by San-A Chemical Co., Ltd .; Was temporarily attached to prepare a double-sided pressure-sensitive adhesive tape for fixing a floor material.

Comparative Example 3 The monomer composition shown in Table 1
A double-sided pressure-sensitive adhesive tape for fixing a floor material was produced in the same manner as in Example 1 except that 20 parts by weight of a rosin ester-based tackifying resin was added to 100 parts by weight of an acrylic pressure-sensitive adhesive polymer having a weight average molecular weight.

Floor construction method Floor material (made by Asahi Woodtec, trade name "Color Floor", thickness 12 mm x width 303 mm x length 1818 m)
m) was fixed on a floor base material having a surface made of Rawan veneer by the following method. First, the floor material fixing double-sided pressure-sensitive adhesive tape was cut into a width of 70 mm, and as shown in FIG. 3, two pieces were stuck along both long-side ends of the back surface of the floor surface material, and the release paper was peeled off. Laying the material was inserted into the already laid flooring. Until the fixing position was determined, no load was applied from above the flooring material, the position was adjusted, and the foot was pressed down and fixed by crimping.

Evaluation Method The adhesive properties of the double-sided adhesive tape for fixing flooring materials are shown in Table 1.
In addition to the storage elastic modulus shown in Table 1, general physical properties include J.I.
DOW ball tack, 180 ° against stainless steel plate
Peel adhesion, stainless steel plate shear holding power,
All were measured according to JISZ0237. or,
Regarding the floor construction method, as a practical adhesive property, the presence or absence of gaps and floating / peeling was evaluated by the following method. The evaluation results are shown in Table 1 together with the general physical properties.

An electric hot carpet is laid on the entire surface of the laid flooring material, and is continuously heated for 3 days in accordance with the “high temperature” scale of the electric hot carpet, and the amount of change between the flooring materials is changed. Is 0.05
It was measured using a thickness gauge in mm units.

Presence / absence of floating / peeling In addition to the evaluation of the gap described in the preceding paragraph, the state of the floor material floating and peeling from the adhesive layer under the same test conditions can be evaluated by visual and stepping feelings such as rocking feeling and floor noise. The evaluation was combined to determine the presence or absence.

[0051]

[Table 1]

[0052]

Since the double-sided pressure-sensitive adhesive tape for fixing flooring according to the first aspect of the present invention is constructed as described above, there is no danger of a working environment being deteriorated by an organic solvent or danger of fire at the time of flooring, and adhesion is achieved. There is no warping or partial peeling of the flooring material due to uneven application of the agent or insufficient adhesive strength of the adhesive, so that a beautiful floor finish can be achieved without any trouble such as floor noise after the construction. . The effect of such floor construction cannot be expected with conventional double-sided adhesive tapes.

Since the double-sided adhesive tape for fixing floor material according to claim 2 is configured as described above, it is temporarily placed on the floor base material via the double-sided adhesive tape for fixing floor material during floor construction. The floor material can be easily re-peeled without deteriorating the adhesive property of the pressure-sensitive adhesive layer or the masking performance of the masking member for replacement or position adjustment, and the laid floor material can be replaced with the floor base material surface. By pressing the double-sided adhesive tape for fixing the floor material by pressing it, there is no warping or partial peeling of the floor material and it can be firmly adhered to the floor base material surface, so the floor of the floor after construction A beautiful floor finish is possible without troubles such as noise.

The floor construction method according to the third aspect of the present invention is configured as described above, so that the floor material is placed on the floor base material in the order of laying, and almost no adhesive layer is present until the floor material is positioned. Without consciousness, it is possible to perform the floor construction work efficiently with extremely good workability, and it is possible to firmly adhere to the floor material at the positioned position only by pressing it against the floor base material surface,
A beautiful floor finish can be achieved, there is no trouble such as floor noise after construction, and the floor construction efficiency is good, so low cost construction is possible.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing one stage of a process for explaining an example of a floor construction method of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a cross-sectional view at the same position as in FIG. 2 at the stage when floor construction is completed.

[Explanation of symbols]

 1: Double-sided adhesive tape for fixing flooring material 11: Adhesive layer 12: Masking member 13: Foam sheet 2: Flooring material 3: Flooring material 4: Wall surface a: Gap

Claims (3)

[Claims] 1. A double-sided pressure-sensitive adhesive tape for fixing a floor material, comprising a foam sheet as a base material, wherein the pressure-sensitive adhesive laminated on at least one surface of the foam sheet base material has a viscoelasticity in a shear direction at a measurement frequency of 10 Hz. The storage elastic modulus at 100 ° C. measured by spectrum is 0.3 × 10 ^{5 to} 1.0
× 10 ⁵ Pa, a double-sided adhesive tape for fixing flooring material. 2. A non-adhesive or light-adhesive material which is configured such that, during pressure bonding, an outer surface of the pressure-sensitive adhesive layer can be positioned on the surface of the pressure-sensitive adhesive layer or on the inner side of the surface by elastic deformation of the base foam sheet. The double-sided pressure-sensitive adhesive tape for fixing a flooring material according to claim 1, wherein the masking member is uniformly and partially coated on at least one surface of the pressure-sensitive adhesive layer so as to protrude from the surface of the pressure-sensitive adhesive layer. 3. A double-sided pressure-sensitive adhesive tape for fixing floor materials according to claim 1 or 2, which is attached to the back surface of the floor material or the surface of the floor base material,
A floor construction method, comprising: laying a floor material on a floor base material by adjusting its position, pressing the floor material against the floor base material surface, and pressing the double-sided adhesive tape for fixing the floor material.