JP2019218732A - Wooden floor material - Google Patents

Abstract

To provide 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 and also has excellent water resistance.SOLUTION: A wooden floor material includes 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. A rear surface of the adhesion layer is approximately planar surface on which no strip grooves are formed, where adhesion of the adhesion layer by a plane tension test is equal to or larger than 0.12 N/mm. Until eight hours passes after water is placed on a surface of the wooden floor material in a state in which the wooden floor material is laid while adhering to the substrate material, water is inhibited from intruding into a gap between the substrate material and the adhesion layer and the adhesion layer is inhibited from peeling from the substrate material.SELECTED DRAWING: Figure 1

Description

The present invention relates to a wooden flooring material having an adhesion layer.

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). To meet this demand, as described in Patent Document 1, a back surface of a wooden base material is required. There has been proposed a wooden flooring material provided with an adsorbing layer via a shock absorbing layer.

JP 2007-224548 A

However, according to the conventional technique described in Patent Document 1, a plurality of grooves extending in the longitudinal direction are provided in parallel on the back surface of the adsorption layer to provide easy peelability (paragraphs 0011, 0025, 0038, FIG. 2). When installed on a place where people walk on foot or around water, there is a problem that water entering from a joint between the wooden flooring materials spreads along the groove and spreads over the entire back surface of the wooden flooring material and is easily peeled from the base material. .

Therefore, the problem to be solved by the present invention is that even if the base material has unevenness, it adheres well, does not cause construction failure such as floating or peeling, and peels off even if water enters after construction. The goal is to provide a wood flooring without any material.

In order to solve this problem, the invention according to claim 1 of the present application is a wooden flooring material in which a decorative material is provided on the front side of a wooden base material and an adhesive layer is provided on the back side, The back surface is a substantially flat surface on which no grooves are formed, and the adhesion strength of the adhesion layer in a plane tensile test is 0.12 N / mm ² or more.

The invention according to claim 2 of the present application is the wood flooring material according to claim 1, wherein an adhesion force of the adhesion layer in a plane tensile test is 0.12 to 0.18 N / mm ² .

In the invention according to claim 3 of the present application, in the wooden flooring material according to claim 1 or 2, a cushion material is provided between a wood base material made of a wood fiber board and an adhesive layer made of an acrylic resin foam. It is characterized by.

Since the wooden flooring material according to the present invention has an adhesion layer that is familiar with and adheres to the base material, the existing flooring material is peeled off when a floor is reformed, an adhesive is applied, and a new flooring material is laid. A series of operations of nailing and fixing can be omitted, and construction is easy. Further, the wooden flooring material according to the present invention is not nailed and fixed to the base material, but is applied by the close contact layer being adhered to the base material, so that once it is applied, it is easy to peel off from the base material, Repairs and renovations can be performed easily.

Further, in the wooden flooring material according to the present invention, since the back surface of the adhesion layer is a substantially flat surface having no grooves, and the adhesion force in the plane tensile test of the adhesion layer is 0.12 N / mm ² or more, The water does not permeate between the base material and the adhesion layer within eight hours after water is placed on the surface of the wooden floor material in a state where the wood floor material is closely adhered to the base material. That is, even if water enters from the joint between the wooden flooring materials after construction, the water does not enter between the wooden flooring material and the flooring material, thereby preventing the wooden flooring material from peeling off from the grounding material.

In addition, since the adhesion force of the adhesion layer in the plane tensile test is set to 0.12 to 0.18 N / mm ² , the adhesion layer is excessively adhered to the base material and prevented from being peeled off during reforming while preventing peeling due to water intrusion. Prevent from becoming.

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 wooden flooring according to an embodiment of the present invention. It is sectional drawing of the wooden flooring by other embodiment of this invention. It is explanatory drawing which shows the method of measuring the adhesion force of an adhesion layer. It is explanatory drawing which shows the test method performed in order to evaluate the water resistance about the Example of this invention, and the comparative example.

A wooden flooring material 10 according to an embodiment of the present invention shown in FIG. 1 has a decorative material 12 provided 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 provided on a back surface side. They are provided sequentially. 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 preferably 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 construction failure such as floating or peeling is likely to occur.

Moreover, it is preferable that 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.

The adhesion layer 14 has an adhesion of 0.12 N / mm ² or more in a plane tensile test. If the adhesion is less than 0.12 N / mm ² , water that has entered from the seam between the wooden floors 10 penetrates between the adhesion layer 14 and the ground after the wooden floor 10 is applied to the ground. Peeled off. On the other hand, if the adhesion exceeds 0.18 N / mm ² , the adhesion to the base material becomes too strong, and once the wooden flooring 10 is applied to the base material, it cannot be easily separated, and It becomes difficult to deal with. Therefore, a preferable range of the adhesion force of the adhesion layer 14 is 0.12 to 0.18 N / mm ² (the details will be described later with reference to Table 1).

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. 3, 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 specimen 10 ′ is brought into close contact. 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 order to apply the wooden floor material 10 to the base material, if there is excessive unevenness on the surface of the base material or if the surface of the base material is not smooth, a resin paint may be applied to the surface of the base material as necessary. After the surface of the base material is made smooth or flat to some extent by providing a sheet, the adhesive layer 14 of the wooden floor material 10 from which the release sheet 15 has been peeled off is directly pressed so as to be pressed against the surface of the base material. The base material is an existing floor, concrete, metal, synthetic resin, or the like. Even if the surface has an irregularity of about ± 3 mm, the thickness of the wood base material 11, the bending rigidity of the wood base material 11, and the adhesion layer 14 If at least one of the above-mentioned ranges of the adhesion is satisfied, it can be well adapted to unevenness of about ± 3 mm and can be constructed without causing construction failure such as floating or peeling.

In order to determine the range of the adhesion force of the adhesion layer 14 described above, a test was performed in the following manner. That is, from the front side, 0.15 mm thick olefin sheet (decorative material 12) /1.0 mm thick wood fiber board (wood base material 11) /1.0 mm thick polyethylene foam (cushion material 13) /0.1 mm thick acrylic In a wooden flooring material 10 (150 mm × 910 mm) having a laminated structure of a base resin foam or a 1.0 mm-thick rubber latex-based pressure-sensitive adhesive (adhesion layer 14), an adhesion force of 0.10 to 0.14 N / with selecting different ones every 0.02 N / mm ² in the range of mm ^2, the contact layer 14 made of 0.1mm thick acrylic resin foam ones generally planar without grooves is formed on the back surface The adhesive layer 14 made of a 1.0 mm thick rubber latex-based pressure-sensitive adhesive had a groove formed on its back surface (width 2 mm extending in the longitudinal direction, depth 0.8 m). m in which seven substantially V-shaped grooves are formed at equal intervals in the transverse direction).

As shown in FIG. 4, these are directly attached to the surface of the base material 20 so as to form a square shape of about 1800 mm on a side, and then a caulking material is arranged in a square shape of 350 mm on a side to form a four-sided wall 21. One liter of water 22 was put in the four peripheral walls 21. It was left for 8 hours in this state, and it was visually checked whether water had infiltrated between the adhesion layer 14 and the base material 20 and whether the wooden floor material 10 had peeled off. Table 1 shows the results.

In the "Evaluation" in Table 1, those which did not come off without water infiltration were marked with "A", but did not peel off. However, because water entered, if the base material 20 was made of wood, it would rot or leak water downstairs. Those that could occur were rated as △, and those that were infiltrated with water and peeled were rated as ×. From the results shown in Table 1, the adhesion layer 14 of adhesive force 0.12 N / mm ² and 0.14 N / grooves on the rear surface of mm ² and a by adhesion layer 14 which are not formed (Examples 1 and 2 ) Was confirmed to have excellent aptitude as the wooden flooring material 10 without peeling off without infiltration of water with the base material 20.

On the other hand, in the case where the adhesion force of the adhesion layer 14 is 0.10 N / mm ² (Comparative Examples 1 and 2), water penetrates into the base material 20 regardless of the presence or absence of the groove. It was confirmed that the adhesion layer 14 needs to have an adhesion of 0.12 N / mm ² or more. In Comparative Example 1, the grooves were not formed on the back surface of the adhesive layer 14. However, since the adhesive force of the adhesive layer 14 was small, water entering from the seam between the wooden flooring materials 10 was It is presumed that the water 14 invaded between the base material 20 and the base material 20.

As can be seen from a comparison of Comparative Example 4 and Comparative and Example 2 Comparative Example 3 Example 1, also the adhesion strength of the adhesion layer 14 is a 0.12 N / mm ² and 0.14 N / mm ² If a groove is formed on the back surface of the adhesive layer 14, water will penetrate into the backing material 20. Therefore, in order to effectively prevent water from entering, the adhesive force of the adhesive layer 14 is required. Of 0.12 N / mm ² or more and that the back surface of the adhesion layer 14 is substantially flat and has no grooves.

Although not included in Table 1, the same test was performed on the wooden flooring material 10 in which the adhesion layer 14 has a large adhesion force of more than 0.14 N / mm ^2. However, when the adhesion force of the adhesion layer 14 exceeds 0.18 N / mm ² , even if it is attempted to remove by hand, the adhesion layer 14 is not easily peeled, and is not suitable for reforming. There was nothing. From this, it was confirmed that the adhesion force of the adhesion layer 14 is preferably 0.18 N / mm ² or less in consideration of the ease of the reforming operation.

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 for 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. 2). 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. It is not used as an essential component of the wood flooring of the present invention because it is used by peeling it off when it is applied to the wood.

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 Adherend 20 Base material 21 Coking material Fourth wall 22 water

Claims (3)

A decorative material is provided on a front surface side of a wooden base material, and a wooden flooring material in which an adhesion layer is provided on a back surface side. The back surface of the adhesion layer is a substantially flat surface on which no grooves are formed, and A wooden flooring material having an adhesion of 0.12 N / mm ² or more in a plane tensile test. Wherein the adhesion force by plane tensile test of the adhesion layer is 0.12~0.18N / mm ^2, wood flooring of claim 1. The wooden flooring according to claim 1 or 2, wherein a cushioning material is provided between a wooden substrate made of a wooden fiberboard and an adhesion layer made of an acrylic resin foam.