JP2019218731A - Floor structure - Google Patents

Abstract

To provide a floor structure including a wooden floor material that even when a substrate material has unevenness, favorably adheres to the substrate material to inhibit occurrence of a construction failure such as lifting and peeling.SOLUTION: By directly sticking a wooden floor material 10 including a wooden base material 11 having a front surface side on which a decorative material 12 is provided and a rear surface side on which an adhesion layer 14 is provided via a cushioning material 13 to a substrate material 20 having a surface having unevenness with differences in height within ±3 mm so as to press the adhesion layer to a surface of the substrate material, the adhesion layer adheres to an uneven surface of the substrate material even without other members such as an adhesive agent or nailing to obtain a floor structure that inhibits occurrence of a construction failure such as lifting and peeling. Preferably, the thickness of the wooden base material is 0.8 to 2.0 mm and adhesion of the adhesion layer by a plane tension test is equal to or larger than 0.08 N/mm.SELECTED DRAWING: Figure 1

Description

The present invention relates to a floor structure in which a wooden flooring is provided on a base material.

Particularly in commercial facilities and the like, there is a long-felt need for a wooden flooring material that can be easily applied to a base material (direct application), and as described in Patent Literature 1, the back side of a wooden flooring material meets this demand. There has been proposed a wooden flooring material provided with an absorption layer (acrylic resin layer) via a buffer material layer.

JP 2010-070906 A

However, according to the prior art described in Patent Literature 1, since the wooden base material is thick and hard to bend such as 5 to 15 mm (paragraph 0019), it is sufficiently adsorbed to the base material having irregularities such as protrusions and recesses on the surface. Without this, there is a problem that poor construction such as floating or peeling occurs.

In Patent Literature 1, in order to eliminate such a construction failure, a floor material is applied after applying a resin paint to the surface of the base material or attaching a resin sheet to make the surface of the base material substantially flat. (Paragraphs 0024 and 0025), however, a new problem arises in that it requires labor such as applying a resin paint or attaching a resin sheet.

Therefore, the problem to be solved by the present invention is to provide a floor structure in which a wooden flooring material is well adhered to a base material having unevenness without additional labor, and construction work such as floating or peeling is provided. It is to prevent failure.

In order to solve this problem, the invention according to claim 1 of the present application is directed to a wooden flooring material in which a decorative material is provided on a front surface side of a wooden base material and an adhesive layer is provided on a back surface side, and the wooden flooring material has a protrusion independent from a plane. Provided on a base material having unevenness on the surface where the height difference from the top to the top, the height difference from the top to the deepest part of the concave part independent of the plane, or the height difference from the top to the deepest part of the continuous wavy unevenness is 3 mm or less The floor structure is characterized in that the adhesion layer of the wooden floor material is in close contact with the uneven surface of the base material without interposing other members.

The invention according to claim 2 of the present application is the floor structure according to claim 1, wherein the thickness of the wooden base material is 0.8 to 2.0 mm, and the adhesion strength of the adhesion layer in a plane tensile test is 0.08 N. / Mm ² or more.

The invention according to claim 3 of the present application, in the floor structure according to claim 1 or 2, adhesion force by plane tensile test of the adhesion layer is characterized in that it is a 0.08~0.18N / mm ^2.

According to a fourth aspect of the present invention, in the floor structure according to any one of the first to third aspects, a cushioning material is provided between a wood substrate made of a wood fiber board and an adhesion layer made of an acrylic resin foam. It is characterized by being able to.

According to the present invention, since the back surface of the wooden flooring material is provided with an adhesion layer that is well-adhered to and adheres to the base material having unevenness with a height difference of 3 mm or less on the surface, the floor can be used for floor renovation and the like. In addition, it is possible to omit a series of operations such as peeling off existing flooring, applying adhesive, laying new flooring and fixing with nails, which is easy to construct, and floating and peeling Does not cause construction failure. In addition, since it is not necessary to use other members such as nailing and adhesives, it is possible to apply the adhesion layer of the wooden floor material to the non-land surface of the base material so that it can be peeled off from the base material after construction. It is easy and can be easily repaired or refurbished.

Further, in the wooden flooring material according to the present invention, the thickness of the wooden base material is set to 0.8 to 2.0 mm and the adhesion of the adhesion layer is set to 0.08 N / mm ² or more, so that Even if there is an irregularity of about 3 mm, it can be absorbed through the bending of the wooden base material and the elastic deformation of the adhesion layer, and can be adapted well to the base material, so that there is no construction failure such as floating or peeling. .

Moreover, in the wood flooring material according to the present invention, the adhesion strength of the adhesion layer is set to be in the range of 0.08 to 0.18 N / mm ² , so that the wood flooring material can adhere well even to a ground material having unevenness. Since it can be constructed and the wooden floor material can be easily separated from the base material after the construction, it is possible to cope with reform.

In addition, the use of a wood fiber board having excellent surface smoothness as a wood base material has the effect of giving a good decorative surface when applying a cosmetic material to the surface by applying a cosmetic material or painting, and the adhesiveness is obtained. By using an acrylic resin foam for the layer, the effect that the fine air bubbles perform the so-called sucker function and adhere or adhere to the surface of the base material satisfactorily is obtained. The effect of imparting appropriate cushioning properties as a material to improve walking feeling can be obtained. Therefore, by having a laminated structure of a wood fiber board (wood base material) / cushion material / acrylic resin foam (adhesion layer), it can be well adapted to a base material having unevenness to prevent construction defects such as floating and peeling. In addition to the basic effect of not causing the flooring, a wooden flooring material that satisfies various performances required as a flooring material can be provided.

1 is a sectional view of a floor structure according to an embodiment of the present invention. It is sectional drawing which shows one Embodiment of the wooden floor material used for this floor structure. It is sectional drawing which shows other embodiment of the wooden floor material used for this floor structure. It is explanatory drawing which shows the method of measuring the adhesion force of an adhesion layer. It is explanatory drawing when the wooden flooring material by the Example of this invention and the comparative example is directly attached to the base material which formed the pseudo unevenness, and the familiarity with the unevenness was tested, (a) and (b) () Is a cross-sectional view and a plan view when a protrusion is formed, and (c) is a cross-sectional view when a recess is formed.

The floor structure according to the embodiment of the present invention shown in FIG. 1 is provided with a wooden flooring 10 on a foundation 20. As shown in FIG. 2, the wooden flooring material 10 is provided with a decorative material 12 on a front surface side of a wooden base material 11 and a cushion material 13, an adhesive layer 14, and a release sheet 15 sequentially provided on a rear surface side. Become. An adhesive made of vinyl acetate resin or the like is used for bonding these materials 11 to 14.

The wood substrate 11 may be plywood, LVL, solid wood, glued laminated wood, wood fiber board such as MDF, particle board, other wood board, or one or more of these composite boards. Is 0.8 to 2.0 mm. If the thickness of the wooden base material 11 is less than 0.8 mm, cracks and chips are likely to occur, and the durability is reduced. If the thickness exceeds 2.0 mm, it becomes difficult to cut with a cutter or the like, and the surface becomes uneven. When the wooden flooring material 10 is applied to a base material having a land (up to about ± 3 mm), the wooden flooring material 10 cannot be adapted to the uneven land, and the construction failure such as floating or peeling is likely to occur (see Table 1 for details). And will be described later).

In addition, the wooden base material 11 has a bending rigidity of 5 × 10 ⁴ to 50 × 10 ⁴ N · mm ² . If the bending stiffness is less than 5 × 10 ⁴ N · mm ² , it will bend too much and the handling will be poor. If it exceeds 50 × 10 ⁴ N · mm ² , it will hardly bend and the surface will be uneven. When the wooden flooring material 10 is applied to a base material having a maximum (approximately ± 3 mm), the wooden flooring material 10 cannot be adapted to the unevenness, and construction failure such as floating or peeling is likely to occur.

The decorative material 12 is not particularly limited as long as it can be provided on the surface of the wooden base material 11 and can give a desired decorative surface to the wooden flooring material 10, but a resin sheet made of olefin or the like or a decorative paper is preferably used. Can be used.

The cushioning material 13 is not particularly limited as long as it can be provided on the back surface of the wooden base material 11 to give a desired cushioning property to the wooden flooring material 10 to improve walking feeling, sound insulation, heat insulation, and the like. As an example, a polyethylene foam is suitably used. Alternatively, a cushion material 13 made of a synthetic resin foam such as an ethylene-vinyl acetate copolymer, vinyl chloride, polyurethane, or polyolefin may be used.

The adhesion layer 14 is not particularly limited as long as it has a function of adhering to or adsorbing to the surface of the base material when the wooden floor material 10 is applied (directly attached) to the base material. (A resin foam made of a polymer compound having an acryl group is widely included) is preferably used. More specifically, the adhesion layer 14 can be formed by bonding a film or sheet made of an acrylic resin foam to the back surface of the cushion material 13 or applying an acrylic resin foam. Alternatively, the adhesive layer 14 may be formed by applying a pressure-sensitive adhesive made of a rubber-based or acrylic resin to the back surface of the wooden flooring 10. In particular, since the adhesive layer 14 made of an acrylic resin foam has fine air bubbles over the entirety thereof, the fine air bubbles exposed on the back surface side of the adhesive layer 14 provided on the back surface of the wooden substrate 11 have a so-called sucker action. And adheres or adheres to the surface of the base material satisfactorily.

Adhesion layer 14 is adhesion by plane tensile test 0.08 N / mm ² or more, preferably 0.08~0.18N / mm ^2. If the adhesion is less than 0.08 N / mm ² , when the wooden flooring 10 is applied to a base material having an uneven surface (maximum of about ± 3 mm) on the surface, the wooden floor material 10 cannot be adapted to the uneven surface and floats. Construction failures such as peeling and peeling are likely to occur. On the other hand, if the adhesion exceeds 0.18 N / mm ² , the adhesion to the base material 20 becomes too strong, and once the wooden flooring 10 is applied to the base material 20, it cannot be easily separated. , It becomes difficult to respond to reforms. From these viewpoints, a more preferable range of the adhesion by the plane tensile test is 0.10 to 0.15 N / mm ² .

In addition, this adhesion force is obtained by adhering a laminate having the adhesion layer 14 as the backmost layer to a SUS304BA steel plate used as an adherend in JIS Z 0237 (adhesive tape / adhesive sheet test method), according to Japanese Agricultural Standards. It is measured based on a test method based on a plywood plane tensile test defined by (JAS). For example, similarly to the wooden flooring 10 of FIG. 1, a specimen 10 ′ (20 × 20 mm) of the wooden flooring 10 having a laminated structure of the decorative material 12 / the wooden substrate 11 / the cushioning material 13 / the adhesion layer 14 from the surface side from the surface side As shown in FIG. 4, the surface side (the olefin sheet side) is adhered to a special jig 17 engaged with the upper chuck 16 with a cyanoacrylate-based adhesive, and the test piece 10 ′ is brought into close contact with the test piece 10 ′. The layer is brought into close contact with the adherend 19 (SUS304BA steel plate) engaged with the lower chuck 18, and in this state, the upper chuck 16 is raised at a load of 5880 N per minute or less to obtain the maximum load (test piece 10 ′). (Load when the sample was peeled off from the adherend 19) was defined as the adhesion.

The release sheet 15 is a material that can be easily peeled off by hand when the wooden flooring 10 is stored or adhered to the adhesive layer 14 and not easily peeled off when the wooden flooring 10 is stored or handled. Although not particularly limited, a resin sheet or release paper made of polyester or the like can be preferably used.

In FIG. 1, for simplicity of illustration, the base material 20 is shown as having a smooth surface, but the floor structure of the present invention uses the above-structured wooden floor material 10 and the release sheet 15. After being peeled off, it is provided on a base material 20 having unevenness with a height difference of 3 mm or less, and the adhesion layer 14 is adhered to the uneven surface of the base material 20. At the time of construction of the wooden flooring material 10, when there is excessive unevenness on the surface of the base material or when the surface of the base material is not smooth, by applying a resin paint or providing a resin sheet on the surface of the base material as necessary. After the surface of the base material is made smooth or flat to some extent, the adhesive layer 14 of the wooden flooring material 10 from which the release sheet 15 has been peeled off is directly applied so as to be pressed against the surface of the base material. The base material 20 is an existing floor material, concrete, metal, synthetic resin, or the like. Even if the surface has an irregularity of about ± 3 mm, the adhesion layer 14 is well adapted to the irregularity, such as floating or peeling. Can be constructed without causing construction failure.

From the surface side, the thickness range of the wood base material 11 described above is 0.15 mm thick olefin sheet (decorative material 12) / wood fiber board (wood base material 11) /1.0 mm thick polyethylene foam (cushion material 13). ) /0.1 mm thick acrylic resin foam (adhesion layer 14), the wood flooring 10 has a laminated structure, and the thickness of the wood fiber board is changed in the range of 0.5 to 3.0 mm to obtain seven types of wood flooring. Test specimens (150 mm x 910 mm) were prepared, these were directly adhered to the surface of the base material, and the suitability as the wooden flooring material 10 was comprehensively evaluated and determined by three evaluation items.

More specifically, referring to FIGS. 5A and 5B, a protrusion 21 having a height of 3 mm is formed on the surface of the base material 20, and the vertex 21 a of the protrusion 21 is The wooden floor material 10 was laid so as to be located at a position P 30 mm from the long side end and the short side end. Further, as shown in FIG. 5C, a concave portion 22 having a depth of 3 mm is formed in the base material 20, and the deepest portion 22 a of the concave portion 22 extends from the long side end and the short side end of the wooden flooring 10. The wooden flooring 10 was laid so as to be located at a position P of 30 mm. The protrusions 21 and the recesses 22 formed in the base material 20 represent the unevenness of the base material 20 in a pseudo manner.

"Easiness of adaptation to irregularities" means that when each sample of the wooden flooring material 10 is directly attached to the base material 20 on which the protrusion 21 or the concave portion 22 is formed as described above, the wooden flooring material 10 is peeled off. The evaluation was performed to determine whether or not it occurred. 〇 indicates that no peeling occurred 24 hours after construction, △ indicates peeling several hours after construction, and X indicates peeling immediately after construction.

"Cutability" is an evaluation of whether or not the wooden flooring material 10 can be cut using general scissors. 〇 indicates that the wooden flooring material 10 can be easily cut, △ indicates that it is slightly difficult to cut, and X indicates that it cannot be cut. Is shown.

The “durability of the wooden base material” is an evaluation of the presence or absence of damage to the wooden base material 11 during construction of the wooden flooring material 10, Δ indicates no damage, and X indicates damage.

The “overall evaluation” is evaluated as “〇” when the evaluation in these three evaluation items does not have any “×”, that is excellent in suitability as the wooden flooring material 10, “△” when the evaluation is slightly poor, and “×” when the evaluation is not appropriate. And

From the results shown in Table 1, if the thickness of the wood substrate 11 is in the range of 0.8 to 2.0 mm (Examples 1 to 4), the cutability is generally good while ensuring the durability, In addition, it was well adapted to irregularities up to ± 3 mm, did not peel off even after 24 hours from the construction, and was confirmed to have excellent suitability as the wooden flooring material 10. On the other hand, when the thickness of the wooden base material 11 is 0.5 mm (Comparative Example 1), the durability is inferior, and when the thickness is 2.5 mm and 3.0 mm (Comparative Examples 2 and 3), it adapts to the unevenness. It was confirmed that none of them were suitable for the wooden flooring material 10 because of poor cutting performance and poor cutting performance.

The protrusions 21 and the recesses 22 of the base material 20 in FIG. 5 were prepared in various shapes and dimensions (width, length) and subjected to the same test. However, regardless of the shapes and dimensions, The height of the protrusion 21 or the depth of the recess 22 is about 3 mm or less, and the vertex 21a of the protrusion 21 or the deepest portion 22a of the recess 22 is the long side end and the short side end of the wooden flooring 10. In the case where it is constructed so as to be located at a distance of about 30 mm or more from the portion, the examples 1 to 4 in which the thickness of the wooden base material 11 is 0.8 to 2.0 mm are the protrusions 21 / It was confirmed that the material was well adapted to the recess 22 and hardly peeled off. When the protrusion 21 and the recess 22 are formed as continuous wavy irregularities instead of the independent protrusion 21 and the recess 22, the peak 21 a of the protrusion 21 and the deepest portion 22 a of the recess 22 are formed. The height difference is about 3 mm or less, and the apex 21 a of the protrusion 21 or the deepest part 22 a of the recess 22 is located about 30 mm or more away from the long side end and the short side end of the wooden flooring 10. When the construction is performed so that the thickness of the wooden base material 11 is 0.8 to 2.0 mm, the adhesion layer 14 is formed on the uneven surface of the base material 20 in the same manner as in Examples 1 to 4 above. It was confirmed that the material was well adapted to water and hardly peeled off.

Although the present invention has been described in detail with reference to the illustrated embodiments, the present invention is not limited thereto, and may be variously modified or changed within the scope of the invention defined based on the description of the claims. It is feasible. For example, when cushioning properties are not particularly required as the wooden flooring material 10, the wooden flooring material 10 may be a laminated wooden flooring material 10 in which the cushioning material 13 is omitted (FIG. 3). The release sheet is used to prevent the adhesion layer from adhering to the floor surface at the time of storage or another wooden floor material deposited below before the construction of the wooden floor material. Since this is used by peeling it off when applied to the timber, it is not an essential component in the wooden flooring material used in the present invention.

REFERENCE SIGNS LIST 10 Wooden floor material 10 ′ Wooden floor material specimen 11 Wooden base material 12 Decorative material 13 Cushion material 14 Adhesive layer 15 Release sheet 16 Upper chuck 17 Dedicated jig 18 Lower chuck 19 Substrate 20 Base material 21 Projecting part 22 Recess

Claims (4)

The wooden flooring material, in which the decorative material is provided on the front side of the wooden base material and the adhesion layer is provided on the back side, is the height difference from the flat surface to the top of the protrusion, the deepest part of the concave portion independent from the flat surface Or a floor structure having an uneven surface on the surface with a height difference of 3 mm or less from the top to the deepest part of the continuous wavy unevenness on the surface. A floor structure characterized by being in close contact with the uneven surface of the material without intervening other members. ^2. The floor structure according to claim 1, wherein the thickness of the wooden base material is 0.8 to 2.0 mm, and the adhesion strength of the adhesion layer in a plane tensile test is 0.08 N / mm ² or more. 3. . The floor structure according to claim 1, wherein an adhesion force of the adhesion layer in a plane tensile test is 0.08 to 0.18 N / mm ² . The floor structure according to any one of claims 1 to 3, wherein a cushioning material is provided between a wood substrate made of a wood fiber board and an adhesion layer made of an acrylic resin foam.