JP7001546B2 - Wood flooring - Google Patents

Description

The present invention relates to a wood flooring material having an adhesive layer.

Especially in commercial facilities, there is an urgent need for a wood flooring material that can be easily applied (directly pasted) to the base material, and as described in Patent Document 1, the back side of the wood substrate can meet this demand. There has been proposed a wood flooring material provided with an adsorption layer (acrylic resin layer) via a cushioning material layer.

Japanese Unexamined Patent Publication No. 2010-070906

However, according to the prior art described in Patent Document 1, since the wood base material is thick and difficult to bend as 5 to 15 mm (paragraph 0019), it is sufficiently adsorbed on the base material having unevenness such as protrusions and recesses on the surface. There was a problem that construction defects such as floating and peeling occurred.

In Patent Document 1, in order to eliminate such construction defects, a resin paint is applied to the surface of the base material, or a resin sheet is attached to make the surface of the base material substantially flat, and then the floor material is constructed. (Paragraphs 0024,0025) However, a new problem is that it takes time and effort to apply resin paint or attach a resin sheet.

Therefore, the problem to be solved by the present invention is a wooden floor that does not require additional work, adheres well even to a base material having unevenness, and does not cause construction defects such as floating and peeling. To provide the lumber.

In order to solve this problem, the invention according to claim 1 of the present application is a wood flooring material in which a decorative material is provided on the front surface side of the wood base material and an adhesion layer is provided on the back surface side, and the wood base material is provided. The thickness of the wood substrate is 0.8 to 1.5 mm, the bending rigidity of the wood substrate is 5 × 10 ⁴ to 50 × 10 ⁴ N ・ mm ² , and the adhesion force by the plane tensile test of the adhesion layer is 0. It is characterized by having a value of 08 N / mm ² or more .

The invention according to claim 2 of the present application is characterized in that, in the wood floor material according to claim 1, the adhesion force of the adhesion layer by a plane tensile test is 0.08 to 0.18 N / mm ² .

In the invention according to claim 3 of the present application, in the wood floor material according to claim 1 or 2, a cushioning 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 wood flooring material according to the present invention has an adhesion layer that is familiar to and adheres to the base material, the existing flooring material is peeled off, an adhesive is applied, and a new flooring material is laid when the floor is remodeled. A series of work of nailing and fixing can be omitted, and the construction is easy. Further, since the wood flooring material according to the present invention is not nailed and fixed to the base material, but is constructed by the adhesion layer adhering to the base material, it is easy to peel off from the base material after the construction once. It can be easily repaired or refurbished.

Further, in the wood floor material according to the present invention, the thickness of the wood base material is 0.8 to 1.5 mm, and the bending rigidity of the wood base material is 5 × 10 ⁴ to 50 × 10 ⁴ N · mm. Since it is set to ² and the adhesion of the adhesion layer is 0.08 N / mm ² or more, even if the base material has an unevenness of about ± 3 mm, the wood base material is bent and / or the adhesion layer is formed. It absorbs this through elastic deformation, can be well adapted to the base material, and does not cause construction defects such as floating and peeling.

Further, in the wood flooring material according to the present invention, the adhesion of the adhesion layer is within the range of 0.08 to 0.18 N / mm ² , so that even a base material having non-landing adhesion can be satisfactorily adhered. Since it can be constructed and it is easy to peel off the wood flooring material from the base material after the construction, it is possible to cope with the remodeling.

In addition, by using a wood fiber board with excellent surface smoothness as the wood base material, the effect of giving a good decorative surface when applying makeup by attaching or painting a decorative material to the surface can be obtained, and adhesion is obtained. By using the acrylic resin foam for the layer, the fine bubbles play a so-called sucking action to obtain the effect of good adhesion or adsorption to the surface of the base material, and by providing a cushioning material between them, the floor The effect of giving an appropriate cushioning property as a material and improving the walking feeling can be obtained. Therefore, by having a laminated structure of wood fiber board (wood base material) / cushion material / acrylic resin foam (adhesion layer), it fits well to the base material with unevenness and causes construction defects such as floating and peeling. In addition to the basic effect of not causing it, it is possible to provide a wood flooring material that satisfies various performances required as a flooring material.

It is sectional drawing of the wood flooring material by one Embodiment of this invention. It is sectional drawing of the wood flooring material by another 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 when the Example and the comparative example of this invention were directly attached to the base material which formed the quasi-landing, and the adaptability to the landing was tested, and (a) and (b) are protrusions. Is a cross-sectional view and a plan view when the above is formed, and (c) is a cross-sectional view when a recess is formed.

In the wood flooring material 10 according to the embodiment of the present invention shown in FIG. 1, a decorative material 12 is provided on the front surface side of the wood base material 11, and a cushioning material 13, an adhesion layer 14 and a release sheet 15 are provided on the back surface side. It is provided in sequence. An adhesive made of vinyl acetate-based resin or the like is used to bond the materials 11 to 14.

As the wood base material 11, plywood, LVL, solid wood, laminated wood, wood fiber board such as MDF, particle board or other wood board, or one or more composite boards thereof can be arbitrarily used, but the thickness is Use one with a value of 0.8 to 1.5 mm. If the thickness of the wood substrate 11 is less than 0.8 mm, cracks and chips are likely to occur and the durability is lowered, and if it exceeds 1.5 mm, it becomes difficult to cut with a cutter or the like and the surface is surfaced. When the wood flooring material 10 is applied to a base material that has unevenness (up to about ± 3 mm), it cannot be adapted to this unevenness, and construction defects such as floating and peeling are likely to occur (see Table 1 for details). See below).

Further, the wood substrate 11 has a bending rigidity of 5 × 10 ⁴ to 50 × 10 ⁴ N · mm ² . If the bending rigidity is less ^{than 5} × 10 ⁴ N ・ mm ² , it will bend too much and it will be difficult to handle. When the wood flooring material 10 is applied to a base material (up to about ± 3 mm), it cannot be adapted to this unevenness, and construction defects such as floating and peeling are likely to occur.

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

The cushion material 13 is not particularly limited as long as it is provided on the back surface of the wood base material 11 and can give a desired cushioning property to the wood floor material 10 to improve walking feeling, sound insulation, heat insulation and the like. As an example, a polyethylene foam is preferably used. Alternatively, the 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 or adsorbing to the surface of the base material when the wood floor material 10 is applied (directly attached) on the base material, but as an example, acrylic resin foaming. A body (widely including a resin foam made of a polymer compound having an acrylic group) is preferably used. More specifically, the adhesive layer 14 can be formed by adhering a film or sheet made of an acrylic resin foam to the back surface of the cushion material 13 or by applying the acrylic resin foam. Alternatively, the adhesive layer 14 may be formed by applying an adhesive made of a rubber-based or acrylic resin or the like to the back surface of the wood flooring material 10. In particular, since the adhesion layer 14 made of an acrylic resin foam has fine bubbles throughout, the fine bubbles exposed on the back surface side of the adhesion layer 14 provided on the back surface of the wood substrate 11 act as a so-called sucker. It adheres well to or adsorbs to the surface of the base material.

The adhesion layer 14 has an adhesion force of 0.08 N / mm ² or more, preferably 0.08 to 0.18 N / mm ² , as determined by the plane tensile test. If the adhesion is less than 0.08 N / mm ² , when the wood flooring material 10 is applied to the base material that has unevenness (up to about ± 3 mm) on the surface, it cannot be adapted to this unevenness and floats. Construction defects 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 wood floor material 10 is applied to the base material 20, it cannot be easily peeled off. , It becomes difficult to deal with reforms. From these viewpoints, the more preferable range of the adhesion force by the plane tensile test is 0.10 to 0.15 N / mm ² .

For this adhesion, the laminated body having the adhesion layer 14 as the innermost layer is brought into close contact with the SUS304BA steel sheet used as an adherend in JIS Z 0237 (adhesive tape / adhesive sheet test method), and is Japanese Agricultural Standard. It was measured based on a test method based on the plane tensile test of plywood defined by (JAS). For example, the test piece 10'(20 × 20 mm) of the wood floor material 10 having a laminated structure of the decorative material 12 / wood base material 11 / cushion material 13 / adhesion layer 14 from the surface side as in the wood floor material 10 of FIG. As shown in FIG. 3, the surface side (olefin sheet side) is adhered to the special jig 17 engaged with the upper chuck 16 with a cyanoacrylate adhesive, and the test piece 10'is adhered to 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 / min or less to obtain a maximum load (test body 10'). The value of (the load when the material is peeled off from the adherend 19) was taken as the adhesion force.

The release sheet 15 adheres to the adhesion layer 14 during storage or handling of the wood floor material 10 and cannot be easily peeled off, and can be easily peeled off by hand when the wood floor material 10 is constructed. However, the present invention is not particularly limited, but a resin sheet made of polyester or the like, a release paper, or the like can be preferably used.

In order to apply this wood flooring 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, apply resin paint or resin to the surface of the base material as necessary. By providing a sheet, the surface of the base material is made smooth or flat to some extent, and then the adhesive layer 14 of the wood floor material 10 from which the release sheet 15 has been peeled off is pressed directly against the surface of the base material. The base material is an existing floor material, concrete, metal, synthetic resin, etc., and even if the surface has an unevenness 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 As long as at least one of the above-mentioned ranges regarding the adhesion of 14 is satisfied, the work can be performed well even on a non-landing property of about ± 3 mm without causing construction defects such as floating and peeling.

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) from the surface side. ) / 0.1 mm thickness In the wood floor material 10 having a laminated structure of acrylic resin foam (adhesion layer 14), the thickness of the wood fiber board is changed within the range of 0.5 to 3.0 mm, and 7 types are used. A test body (150 mm × 910 mm) was prepared, these were directly attached to the surface of the base material, and the suitability as the wood floor material 10 was comprehensively evaluated and determined by three evaluation items.

More specifically with reference to FIGS. 4A and 4B, a protrusion 21 having a height of 3 mm is formed on the surface of the base material 20, and the apex 21a of the protrusion 21 is the wooden floor material 10. The wood flooring material 10 was laid so as to be located at a position P 30 mm from the long side end portion and the short side end portion. Further, as shown in FIG. 4C, a recess 22 having a depth of 3 mm is formed in the base material 20, and the deepest portion 22a of the recess 22 is formed from the long side end portion and the short side end portion of the wood flooring material 10. The wood flooring material 10 was laid so as to be located at the position P of 30 mm. The protrusions 21 and recesses 22 formed in the base material 20 are pseudo representations of the non-landing of the base material 20.

"Familiarity with non-landing" means that when each sample of the wood floor material 10 is directly attached to the base material 20 on which the protrusion 21 or the recess 22 is formed as described above, the wood floor material 10 is peeled off. It is an evaluation of whether or not it occurs, where ◯ indicates that peeling does not occur even after 24 hours have passed since the construction, Δ indicates that the peeling occurs within a few hours after the construction, and × indicates that the peeling occurs immediately after the construction.

"Cutability" is an evaluation of whether or not the wood flooring material 10 can be cut using general scissors. 〇 is easy to cut, △ is a little difficult to cut, and × is not. Is shown.

“Durability of the wood base material” is an evaluation of the presence or absence of damage to the wood base material 11 during construction of the wood floor material 10, where ◯ indicates no damage and × indicates damage.

In the "general evaluation", if there is no x in the evaluations of these three evaluation items, the one with excellent suitability as the wood flooring material 10 is rated as 〇, the one with slightly inferior suitability is marked with △, and the one without suitability is marked with ×. And said.

From the results shown in Table 1, if the thickness of the wood substrate 11 is in the range of 0.8 to 1.5 mm (Examples 1 to 3 ), the cutability is good while ensuring the durability. In addition, it was confirmed that it fits well even on uneven land up to ± 3 mm, does not peel off even 24 hours after construction, and has excellent suitability as a wooden flooring material 10. On the other hand, when the thickness of the wood base material 11 is 0.5 mm (Comparative Example 1), the durability is inferior, and when it is 2.0 mm (Comparative Example 2), it is easy to adapt to non-land and cutability. It is slightly inferior, and in the cases of 2.5 mm and 3.0 mm (Comparative Examples 3 and 4 ), it cannot be adapted to non-landing and is also inferior in cutability, so that neither is suitable for the wooden floor material 10. It was confirmed. Further, when the protrusion 21 and the recess 22 are continuously formed as wavy irregularities instead of the independent protrusion 21 and the recess 22, the apex 21a of the protrusion 21 and the deepest portion 22a of the recess 22 are formed. The height difference is about 3 mm or less, and the apex 21a of the protrusion 21 or the deepest part 22a of the recess 22 is located about 30 mm or more away from the long side end and the short side end of the wood flooring material 10. On condition that the thickness of the wood base material 11 is 0.8 to 1.5 mm, the adhesion layer 14 is the non-landing material 20 as in the above Examples 1 to 3 . It was confirmed that it fits well on the surface and does not easily come off.

As for the protrusion 21 and the recess 22 of the base material 20 in FIG. 4, various shapes and dimensions (width and length) were prepared and the same test was performed, but regardless of the shape and dimensions, the same test was performed. The height of the protrusion 21 or the depth of the recess 22 is about 3 mm or less, and the apex 21a of the protrusion 21 or the deepest portion 22a of the recess 22 is the long side end portion and the short side end portion of the wooden floor material 10. Examples 1 to 3 in which the thickness of the wood base material 11 is 0.8 to 1.5 mm when the work is performed so as to be located at a distance of about 30 mm or more from the portion are the protrusions 21 of the base material 20. / It was confirmed that it fits well in the recess 22 and is unlikely to peel off.

Although the present invention has been described in detail above based on the illustrated embodiment, the present invention is not limited to this, and is variously modified or modified within the scope of the invention defined based on the description of the claims. It is feasible. For example, when the wood flooring material 10 is not particularly required to have cushioning properties, the wood flooring material 10 may have a laminated structure in which the cushioning material 13 is omitted (FIG. 2). The release sheet prevents the adhesion layer from adhering to the floor surface during storage or another wood floor material deposited below before the construction of the wood floor material, and is based on the wood floor material. It is not an indispensable component of the wood flooring material of the present invention because it is peeled off and used when it is applied to the material.

10 Wood floor material 10'Wood floor material test piece 11 Wood base material 12 Decorative material 13 Cushion material 14 Adhesive layer 15 Release sheet 16 Upper chuck 17 Dedicated jig 18 Lower chuck 19 Adhesive body 20 Base material 21 Protrusion 22 Recess

Claims (3)

It is a wood flooring material in which a decorative material is provided on the front surface side of the wood base material and an adhesion layer is provided on the back surface side. The thickness of the wood base material is 0.8 to 1.5 mm, and the wood base material has a thickness of 0.8 to 1.5 mm. A wood floor material characterized in that the bending rigidity of the material is 5 × 10 ⁴ to 50 × 10 ⁴ N ・ mm ² , and the adhesion force of the adhesion layer by the plane tensile test is 0.08 N / mm ² or more . The wood flooring material according to claim 1, wherein the adhesion force of the adhesion layer in a plane tensile test is 0.08 to 0.18 N / mm ² . The wood flooring material according to claim 1 or 2, wherein a cushioning material is provided between a wood base material made of a wood fiber board and an adhesive layer made of an acrylic resin foam .

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