Floor construction method for floating floor

Abstract

In this floor construction method for a floating floor, a floor finishing material (7), the back surface (4a) of which is provided with a step-through prevention sheet (1), is installed in a floating floor configuration. The step-through prevention sheet (1) is provided with: a core material (2) formed from a material containing glass fiber cloth; a pair of asphalt layers (3), (3) provided on both sides of the core material (2) in the thickness direction and formed from a material containing asphalt; and an adhesive layer (4) provided on one asphalt layer (3) of the pair of asphalt layers (3), (3) and affixed to the back surface (7a) of the floor finishing material (7).

Description

Floating floor installation method

[0001] The present invention relates to a method for constructing a floating floor.

[0002] Conventionally, floating floor finishes known as free access floors, such as those disclosed in Patent Document 1 below, have been used primarily for indoor floor finishes. Wiring for computer rooms and the like can be accommodated in the space between the floor finish material and the floor slab. Generally, floor finishes are made of steel, aluminum, concrete, wood, and other materials. In recent years, floating floor finishes have been adopted outdoors as well, as barrier-free construction can be easily performed on building rooftops, exteriors, and the like. Concrete panels and wood decks are often used as outdoor floor finishes due to their cost, durability, and other factors.

[0003] The size of the unit panels that make up the floor finishing material is often about 600mm square to reduce the amount of timber used to support the floating floor. If the floor finishing material is made of concrete, it can be reinforced with steel bars, so even if the unit panels are large, they still have resistance to bending due to impacts from walking, etc.

[0004] Meanwhile, natural stone (marble, granite, etc.) and ceramic panels are becoming popular from the viewpoint of aesthetic floor finishes. To ensure that these components can adequately withstand bending forces, measures must be taken, such as increasing their thickness or firmly attaching reinforcing materials to their backsides. For example, a method has been adopted in which high-strength glass fiber cloth is firmly attached to the backside of a 20 mm thick, 600 mm square granite panel using polyester resin. Furthermore, Patent Documents 2 and 3 listed below disclose methods for reinforcing and fixing ceramic panels.

[0005] Resistance to impacts such as foot traffic is tested by the Free Access Floor Association, which tests by dropping a sandbag from a specified height.

[0006] JP 2022-31593 A JP 8-295579 A JP 6-280372 A

[0007] When the above impact resistance test was conducted on granite panels with reinforcement, the drop height at which the granite panel cracked was improved compared to the unreinforced version, but the granite panel still cracked and the sandbags fell. In actual use, there is a problem that pedestrians' feet can step through the granite panel.

[0008] Therefore, the present invention has been made in consideration of the above circumstances, and provides a method for constructing a floating floor that can prevent floating floor-type floor finishing materials from being stepped through due to walking loads.

[0009] (1) To achieve the above object, a floating floor construction method according to one embodiment of the present invention is a floating floor construction method in which a floor finishing material with a step-through prevention sheet on its backside is installed in a floating floor manner. The step-through prevention sheet comprises a core material, a pair of asphalt layers, and an adhesive layer. The core material is formed of a material containing glass fiber cloth. The pair of asphalt layers are provided on both sides of the core material in the thickness direction and are formed of a material containing asphalt. The adhesive layer is provided on one of the pair of asphalt layers and is attached to the backside of the floor finishing material.

[0010] (2) In the floating floor construction method according to the above aspect (1), the core material has a tensile strength of 300 N / cm or more in both the vertical and horizontal directions and a 3% tensile stress of 100 N / cm or more.

[0011] (3) In the floating floor construction method according to the above aspect (1) or (2), the core material is glass fiber cloth.

[0012] (4) In the floating floor construction method according to any one of the above aspects (1) to (3), the core material is a polyester fiber cloth.

[0013] (5) In the floating floor construction method according to any one of the above aspects (1) to (4), the shear adhesive strength between the anti-penetration sheet and the floor finishing material is 50% or less of the tensile strength of the anti-penetration sheet at a measurement temperature range of 0 to 60°C.

[0014] (6) In the floating floor construction method according to any one of the above aspects (1) to (5), the thickness of the adhesive layer is 0.3 mm or more.

[0015] (7) In the floating floor construction method according to any one of the above aspects (1) to (6), the surface of the step-through prevention sheet is subjected to an anti-blocking treatment.

[0016] According to one aspect of this embodiment, it is possible to prevent floating floor type floor finishing materials from being stepped through due to walking load.

[0017] 1 is a cross-sectional view of a step-through prevention sheet used in a floor construction method for a floating floor according to one embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating a floor construction method for a floating floor according to one embodiment of the present invention. FIG. 3 is a photograph showing the step-through test for Method 3. FIG. 4 is a photograph showing the step-through test for Method 3. FIG. 5 is a photograph showing the step-through test for Method 4. FIG. 6 is a photograph showing the soft body impact test for Method 4. FIG. 7 is a photograph showing the soft body impact test for Method 4. FIG. 8 is a photograph after the Method 3 test for Example 1. FIG. 9 is a photograph after the Method 3 test for Comparative Example 4. FIG. 10 is a photograph after the Method 3 test for Comparative Example 5. FIG. 11 is a photograph after the Method 3 test for Comparative Example 8. FIG. 12 is a photograph after the Method 4 test for Example 1. FIG. 13 is a photograph after the Method 4 test for Comparative Example 4. FIG. 14 is a photograph after the Method 4 test for Comparative Example 5. FIG. 15 is a photograph after the Method 4 test for Comparative Example 8.

[0018] A method for constructing a floating floor according to one embodiment of the present invention will be described with reference to the drawings, but the present invention is not limited to what is shown in the drawings.

[0019]

[0013] Figure 1 is a cross-sectional view of a step-through prevention sheet used in a floating floor installation method according to one embodiment of the present invention. Figure 2 is a cross-sectional view illustrating a floating floor installation method according to one embodiment of the present invention. As shown in Figure 1, step-through prevention sheet 1 comprises a core material 2, an asphalt layer 3, a surface finishing material 6, an adhesive layer 4, and a release sheet 5. As shown in Figure 2, with the release sheet 5 peeled off, the adhesive layer 4 of step-through prevention sheet 1 is attached to the back surface 7a of floor finishing material 7 and rolled down to form flooring material 8 in which the floor finishing material 7 and step-through prevention sheet 1 are integrated.

[0020] The step-through prevention sheet 1 comprises a core material 2 coated on both sides with an asphalt layer 3, one side of which is covered with an adhesive layer 4 and a release sheet 5, and the other side is treated with an anti-blocking surface finishing material 6. When applying the step-through prevention sheet 1 to a floor finishing material 7, for example, by cutting the sheet to a size that leaves a gap of about 5 mm from the outer periphery of the floor finishing material 7 and attaching it to the floor finishing material 7, it is possible to prevent the step-through prevention sheet 1 from peeling off and falling off the floor finishing material 7 without soiling the appearance of the floor finishing material 7.

[0021] As shown in Figure 1, the core material 2 is formed in a sheet shape. The sheet surface of the core material 2 faces the thickness direction of the layers constituting the penetration prevention sheet 1. The core material 2 is preferably formed from a material containing at least one of glass fiber cloth and polyester fiber cloth. From the viewpoint of heat resistance, the core material 2 is more preferably formed from a plain woven glass fiber cloth.

[0022] Generally, the tensile strength of glass fiber cloth varies depending on the density and mass of the glass fiber. The density is determined by the number of glass fibers in the vertical and horizontal directions per 25 mm width and the mass per 1 m ２ The weight is determined by the mass per unit area. Plain weave products are used. The vertical and horizontal directions are defined as the direction perpendicular to the thickness direction of the core material 2, and the horizontal direction is defined as the direction perpendicular to the thickness direction of the core material 2 and the vertical direction.

[0023] As an example, a mass of 66 g / m ２ The tensile strength of a plain woven glass fiber cloth with a density of 30 threads / 25 mm in the vertical direction and 25 threads / 25 mm in the horizontal direction is 120 N / cm in the vertical direction and 102 N / cm in the horizontal direction. The glass fiber cloth used in the core material 2 of this embodiment has a mass of 60 to 180 g / m ２ The density is preferably 16 to 42 threads / 25 mm lengthwise and 15 to 32 threads / 25 mm widthwise. The tensile strength is preferably 300 N / cm or more and the 3% tensile stress is preferably 100 N / cm or more, but is not limited to these. Furthermore, the 3% tensile stress is preferably 100 N / cm or more, and more preferably 130 N / cm or more.

[0024] The asphalt layer 3 is formed in a sheet shape. The sheet surface of the asphalt layer 3 faces the thickness direction of each layer constituting the penetration prevention sheet 1. The asphalt layer 3 is provided on both sides of the core material 2 in the thickness direction. The asphalt layer 3 is formed from a material containing asphalt, such as straight asphalt, blown asphalt, solvent deasphalted asphalt, or modified asphalt. In this embodiment, in order to reinforce the strength of the core material 2, the asphalt layer 3 is preferably formed from a material containing modified asphalt. Modified asphalt refers to petroleum asphalt to which polymers or natural asphalt have been added to improve properties such as flow resistance, low-temperature flexibility, and adhesion to aggregate.

[0025] The adhesive layer 4 is formed in a sheet shape. The adhesive layer 4 is provided on the surface opposite the core material 2 of one of the asphalt layers 3 on both sides of the core material 2. The adhesive layer 4 is an adhesive asphalt obtained by adding a viscoelastic polymer such as SBS, SBR, or recycled butyl to petroleum asphalt, and optionally a tackifying resin such as a rosin-based or petroleum resin, or a naphthenic or other process oil, to impart flow resistance, low-temperature flexibility, and adhesiveness. If the thickness of the adhesive layer 4 is less than 0.3 mm, it is difficult to adapt to the unevenness of the back surface 7a of the floor finishing material 7 (see Figure 2), and if it exceeds 1 mm, it increases costs and is not economical. Therefore, the thickness of the adhesive layer 4 is preferably 0.3 mm or more and 1.0 mm or less.

[0026] Typically, the most common method for bonding reinforcement materials is to use adhesives such as epoxy resins. Asphalt waterproofing methods involve applying a flowing sheet of molten asphalt as an adhesive; torch methods involve applying a sheet by heating it with a burner to melt it; and cold adhesive methods involve using an adhesive asphalt layer, peeling off a release sheet, and rolling it down. When the shear adhesive strength was 60% or more of the tensile strength, breakthrough due to reinforcement breakage was observed, while when it was 50% or less, breakthrough prevention was achieved. Therefore, it is preferable that the shear adhesive strength of the adhesive layer 4 be 50% or less. Furthermore, from the perspective of workability, cold adhesive methods using an adhesive layer are more preferable due to the time it takes for adhesives to harden after application and the variability caused by the degree of heating in the torch method and the risk of using fire on site.

[0027] The release sheet 5 is formed in a sheet shape and is provided on the surface of the adhesive layer 4 opposite the asphalt layer 3. Examples of the release sheet 5 include release paper and release film, which are paper or film with a release agent applied to one or both sides thereof, but release film is preferred in consideration of reducing waste during construction, etc.

[0028] The surface finishing material 6 is provided on the surface of the asphalt layer 3 on both sides of the core material 2, where the adhesive layer 4 is not provided. As shown in Figure 2 , by attaching a step-through prevention sheet 1 to the back surface 7a of the floor finishing material 7 in advance, the ease of installation of the step-through prevention method at a floating floor construction site is improved. However, since the step-through prevention sheets 1 are stored in a stacked manner, if the asphalt layer 3 is exposed, there is a risk of blocking of the asphalt layer 3, contaminating the surface of the floor finishing material 7. To prevent this blocking, it is preferable to attach a surface finishing material 6 made of a synthetic resin film to the surface of the asphalt layer 3. The surface finishing material 6 may also be a sprinkling of mineral powder, a synthetic fiber nonwoven fabric, or a synthetic resin film (PE, PP, PET, etc.).

[0029] The floor finishing material 7 is attached to the back surface 4a of the adhesive layer 4 with the release sheet 5 of the penetration prevention sheet 1 removed. There are no restrictions on the material of the floor finishing material 7, but natural stone or ceramic tile is preferred in consideration of modern aesthetics. Furthermore, considering that the floor is a floating floor and pedestrians will be passing through, the thickness of the floor finishing material 7 is preferably 20 mm or more.

[0030] A beam 11 is placed on an installation surface such as a floor slab, and a floor material 8 is placed on the beam 11. This is a floating floor type in which the floor material is placed above the installation surface with a space between it and the installation surface.

[0031] If the thickness of the floor finishing material 7 is thin, it is a floating floor type, and there is a high possibility that the floor finishing material 7 will crack when pedestrians pass by. In the case of a foot-through prevention sheet 1 in which the floor finishing material 7 is bonded to the foot-through prevention sheet 1 by making the thickness of the floor finishing material 7 20 mm or more, a 1 kg steel ball was dropped from a height of 600 mm, and after cracks appeared in the floor finishing material 7, even if a person weighing 100 kg jumped on it 100 times, the number of cracks and breaks in the floor finishing material 7 increased, but it was confirmed in practice that the person would not fall below the floor finishing material 7 (under the floor).

[0032] The shear adhesive strength between the penetration prevention sheet 1 and the floor finishing material 7 is preferably 50% or less of the tensile strength of the penetration prevention sheet 1 in the measurement temperature range of 0 to 60°C.

[0033] The flooring material 8 according to this embodiment will be further described using examples and comparative examples. The present invention is not limited in any way by the specific contents of the examples and comparative examples.

[0034] (Example) A floating floor type flooring material 8 shown in Figures 1 and 2 was produced by the following procedure. Ceramic tiles were used as the floor finishing material 7. The thickness of the ceramic tiles was 20 mm. Since the most common size of ceramic tiles is 600 mm square, the product width of the penetration prevention sheet 1 was set to 590 mm.

[0035] The core material 2 of the step-through prevention sheet 1 is a glass fiber cloth substrate (manufactured by Unitika Ltd., basis weight 155 g / m ２ ) is used.

[0036] A modified asphalt layer is coated on a glass fiber cloth substrate as the asphalt layer 3 .

[0037] An adhesive layer 4 having a thickness of 0.4 mm is provided on one of the pair of asphalt layers 3. The adhesive layer 4 is covered with a 0.03 mm release film as a release sheet 5. Mineral powder particles are scattered on the other of the pair of asphalt layers 3 as a surface finishing material 6. The asphalt layer 4 is cut to a width of 590 mm and wound into a roll having a length of 18 m.

[0038] Thereafter, when the sheet 1 is applied to the ceramic tile (floor finishing material 7) at a work site, the sheet 1 is cut to a size that leaves a gap of 5 mm from the periphery of the ceramic tile (floor finishing material 7) and pasted together to form a flooring material 8 in which the ceramic tile (floor finishing material 7) and the sheet 1 are integrated. The flooring material 8 is supported by ties or the like and installed as a floating floor.

[0039] As shown in Table 1 below, Comparative Examples 1 to 9 were set up by changing the type of core material, the tensile strength described below, the 3% tensile stress described below, and the method of adhesion to the floor finishing material 7.

[0040] Tests were conducted as evaluation methods for the present invention using the following methods. Tests were conducted using flooring materials of Example 1 and Comparative Examples 1 to 9. The effectiveness of step-through prevention was evaluated using Test Methods 1 to 4, which will be described later. (Test Specimen Preparation) A 600 x 600 mm ceramic tile (floor finishing material 7) was set on a 200 mm high PF stand and rail (joist steel) manufactured by Nissin Kogyo, and impact tests were conducted using the following two methods. In Example 1 and Comparative Examples 1 to 3 in Table 1 below, a 590 x 590 mm step-through prevention sheet 1 was attached to the back surface 7a of the ceramic tile (floor finishing material 7). In Comparative Examples 4 and 5, a nonwoven fabric was used as the core material. In Comparative Examples 6 and 7, a polyester cloth was used as the core material. In Comparative Examples 8 and 9, a polyester film was used as the core material.

[0041] (Method 1: Tensile test) Each test specimen was cut into a size of 200 x 50 mm, and the tensile strength and 3% tensile stress were measured at a gripping distance of 100 mm and a pulling speed of 100 mm / min in accordance with JIS A 6022. The test results are shown in the "Tensile strength" and "3% tensile stress" columns in Table 1 below.

[0042] (Method 2: Shear adhesion test) Each test piece is attached to a flexible board with an adhesive area of ​​40 x 40 m. ２ The shear adhesive strength was measured by rolling once with a 2 kg deadweight roller at a pulling speed of 100 mm / min. The test results are shown in the "shear adhesive strength" column in Table 2 below.

[0043] (Method 3: Step-Through Test) A steel ball weighing 1 kg was dropped from a height of 600 mm above the surface of the ceramic tile to forcibly crack the ceramic tile. A person weighing 100 kg then jumped on the ceramic tile to evaluate the step-through effect. The evaluation results are listed in the "Step-Through Test Results" column in Tables 1 and 2 below, with the following criteria: A: 50 times or more; B: 20 ​​to less than 50 times; C: 10 to less than 20 times; and D: less than 10 times or immediately after jumping. The test conditions are shown in Figures 3 and 4. Figure 7 shows a photograph of Example 1 after the test. Figure 8 shows a photograph of Comparative Example 4 after the test. Figure 9 shows a photograph of Comparative Example 5 after the test. Figure 10 shows a photograph of Comparative Example 8 after the test.

[0044] (Method 4: Soft Body Impact Test) In accordance with European Standard UNI EN 12825 (2003), a 40 kg sandbag with a diameter of 300 mm (bottom) was dropped from a height of 1000 mm from the surface of the ceramic tile to evaluate the step-through effect. The evaluation results are listed in the "Soft Body Impact Step-Through Test Results" column in Tables 1 and 2 below as follows: ◯: No drop-out or breakage; Δ: No drop-out or partial breakage; ×: Drop-out and breakage. The test conditions are shown in Figures 5 and 6. Figure 11 shows a photograph of Example 1 after the test. Figure 12 shows a photograph of Comparative Example 4 after the test. Figure 13 shows a photograph of Comparative Example 5 after the test. Figure 14 shows a photograph of Comparative Example 8 after the test.

[0045]

[0046]

[0047] In Table 2, the tensile strength indicates the tensile strength of the penetration prevention sheet 1. The shear adhesive strength indicates the shear adhesive strength between the penetration prevention sheet 1 and the floor finishing material 7.

[0048] From Table 1, it can be seen that in Example 1 and Comparative Example 1, Method 3: Step-through test was rated A, and Method 4: Soft body impact test was rated O. From the viewpoint of workability, it is preferable to use adhesive layer 4 of Example 1 rather than the torch of Comparative Example 1, because the adhesive takes time to harden after application and the torch method varies depending on the degree of heating and there is a risk of using fire on site.

[0049] As can be seen from Table 2, when the step-through prevention sheet 1 is adhered to the floor finishing material 7 with an epoxy resin, the shear adhesive strength between the step-through prevention sheet 1 and the floor finishing material 7 exceeds 50% of the tensile strength of the step-through prevention sheet 1. By using the adhesive layer 4 for adhesion, the shear adhesive strength between the step-through prevention sheet 1 and the floor finishing material 7 can be made 50% or less of the tensile strength of the step-through prevention sheet 1.

[0050] Generally, the cause of cracking due to impact is that even if the cracking strength is improved, the resistance to cracking is affected by the reinforcement at zero span, so using a material with a high elongation percentage has little effect. In this embodiment, the step-through prevention sheet 1, which is a high-strength reinforcement, is attached to the floor finishing material 7 with the adhesive layer 4, so that the floating floor type floor finishing material 7 can be prevented from being stepped through by walking load.

[0051] The above describes one embodiment of the present invention and examples, but the specific configuration is not limited to this embodiment, and includes modifications and combinations of configurations within the scope that does not deviate from the gist of the present invention.

[0052] It is possible to prevent floating floor type floor finishing materials from being stepped through by foot load.

[0053] REFERENCE SIGNS LIST 1: anti-penetration sheet 2: core material 3: asphalt layer 4: adhesive layer 5: release sheet 4a: back side of adhesive layer 6: surface finishing material 7: floor finishing material 7a: back side of floor finishing material 8: floor material 11: bundle

Claims

1. A method for constructing a floating floor in which a floor finishing material with a step-through prevention sheet on its backside is installed in a floating floor style, wherein the step-through prevention sheet comprises: a core material made of a material containing glass fiber cloth; a pair of asphalt layers made of a material containing asphalt and provided on both sides of the core material in the thickness direction; and an adhesive layer provided on one of the pair of asphalt layers and attached to the backside of the floor finishing material.

2. A method for constructing a floating floor as described in claim 1, wherein the core material has a tensile strength of 300 N / cm or more in both the vertical and horizontal directions and a 3% tensile stress of 100 N / cm or more.

3. A method for constructing a floating floor as described in claim 1 or 2, wherein the core material is glass fiber cloth.

4. A method for constructing a floating floor as described in claim 1 or 2, wherein the core material is polyester fiber cloth.

5. A method for constructing a floating floor as described in claim 1 or 2, wherein the shear adhesive strength between the anti-poke sheet and the floor finishing material is 50% or less of the tensile strength of the anti-poke sheet at a measurement temperature range of 0 to 60°C.

6. A method for constructing a floating floor as described in claim 1 or 2, wherein the thickness of the adhesive layer is 0.3 mm or more.

7. A method for constructing a floating floor as described in claim 1 or 2, wherein the surface of the anti-penetration sheet is treated to prevent blocking.

Images