JP7001548B2 - 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 surface of the wood base material can meet this demand. A wood flooring material in which an adsorption layer is provided via a shock absorbing layer has been proposed.

JP-A-2007-224548

However, according to the prior art 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 peeling property (paragraphs 0011, 0025, 0038, FIG. 2). There was a problem that when it was installed in a place where people walk with shoes or around water, the water that had infiltrated from the seams between the wooden flooring materials spreads through the groove and spreads over the entire back surface of the wooden flooring material, making it easy to peel off from the base material. ..

Therefore, the problem to be solved by the present invention is that even a base material having unevenness adheres well, does not cause construction defects such as floating and peeling, and peels even if water infiltrates after construction. It is to provide wood flooring without wood flooring.

In order to solve this problem, in the invention according to claim 1 of the present application, a decorative material is provided on the front surface side of the wood base material, and a substantially flat back surface on which no groove is formed is provided on the back surface side of the wood base material. It is a woody floor material provided with an adhesive layer having an adhesive layer, and is characterized in that the adhesive force of the adhesive layer by a plane tensile test is 0.12 to 0.18 N / mm ² .

The invention according to claim 2 of the present application is characterized in that, in the wood floor material according to claim 1, 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. And.

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 flooring material according to the present invention, the back surface of the adhesion layer is a substantially flat surface without grooves, and the adhesion force of the adhesion layer by the plane tensile test is 0.12 N / mm ² or more. Water does not infiltrate between the base material and the adhesion layer within 8 hours after placing water on the surface of the wood floor material in a state where the wood floor material is spread in close contact with the base material. That is, even if water enters from the joint between the wood flooring materials after construction, it does not enter between the wood flooring materials and the base material, so that it is prevented from peeling off from the base material.

In addition, since the adhesion force of the adhesion layer is set to 0.12 to 0.18 N / mm ² in the plane tensile test, it adheres excessively to the base material and is difficult to peel off at the time of reforming while preventing peeling due to the infiltration of water. Prevent it from becoming.

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 which shows the test method performed in order to evaluate the water resistance for the Example and the comparative example of this invention.

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 Is preferably 0.8 to 2.0 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 2.0 mm, it becomes difficult to cut with a cutter or the like and the surface is not suitable. When the wood flooring material 10 is applied to a base material having land (up to about ± 3 mm), it cannot be adapted to this unevenness, and construction defects such as floating and peeling are likely to occur.

Further, the wood substrate 11 preferably 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 adhesion 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 0.12 N / mm ² or more as determined by the plane tensile test. If the adhesion is less than 0.12 N / mm ² , after the wood flooring material 10 is applied to the base material, water that has entered from the seams between the wood flooring materials 10 infiltrates between the adhesion layer 14 and the base material. It will come 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 wood flooring material 10 is applied to the base material, it cannot be easily peeled off and reformed. It becomes difficult to deal with. Therefore, the preferable range of the adhesion force of the adhesion layer 14 is 0.12 to 0.18 N / mm ² (details will be described later with reference to Table 1).

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 to the surface of the base material or resin 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, concrete, metal, synthetic resin, etc., and even if there is a non-landing of about ± 3 mm on the surface, the thickness of the wood base material 11, the bending rigidity of the wood base material 11, and the adhesion layer 14 As long as it satisfies at least one of the above-mentioned ranges of the adhesive force, it fits well even on a non-landing property of about ± 3 mm, and can be constructed without causing construction defects such as floating and peeling.

In order to determine the range of the adhesion force of the adhesion layer 14 described above, a test was conducted as follows. That is, from the surface 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 the wood floor material 10 (150 mm × 910 mm) having a laminated structure of a resin foam or a 1.0 mm thick rubber latex adhesive (adhesion layer 14), the adhesion as the adhesion layer 14 is 0.10 to 0.14 N / Select different ones in the range of mm ² for each 0.02 N / mm ² , and for the adhesion layer 14 made of 0.1 mm thick acrylic resin foam, select a substantially flat one in which no groove is formed on the back surface thereof. The adhesive layer 14 made of a 1.0 mm thick rubber latex-based adhesive has a groove formed on the back surface thereof (a substantially V-shaped groove having a width of 2 mm and a depth of 0.8 mm extending in the longitudinal direction). A total of 7 pieces were formed at equal intervals in the lateral direction).

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

In the "evaluation" in Table 1, those that did not peel off due to the infiltration of water did not peel off, but because of the infiltration of water, when the base material 20 was made of wood, it rotted or leaked downstairs. Those that may occur are marked with Δ, and those that are peeled off due to water infiltration are marked with ×. From the results shown in Table 1, the adhesion of the adhesion layer 14 is 0.12 N / mm ² and 0.14 N / mm ² , and no groove is formed on the back surface of the adhesion layer 14 (Examples 1 and 2). ) Was confirmed to have excellent suitability as a wood flooring material 10 because water did not penetrate into the base material 20 and did not peel off.

On the other hand, in the case where the adhesion layer 14 has an adhesion force of 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 2 , no groove is formed on the back surface of the adhesion layer 14, but since the adhesion of the adhesion layer 14 is small, water that has entered from the seams of the wood flooring materials 10 is the adhesion layer. It is presumed that 14 was lifted from the base material 20 and water had infiltrated between them.

Further, as can be seen from the comparison between Example 1 and Comparative Example 3 and the comparison between Example 2 and Comparative Example 4, even if the adhesion force of the adhesion layer 14 is 0.12 N / mm ² and 0.14 N / mm ² . If a groove is formed on the back surface of the adhesion layer 14, water will infiltrate between the adhesion layer 14 and the base material 20, so that the adhesion of the adhesion layer 14 is to be effectively prevented in order to effectively prevent the infiltration of water. It was confirmed that two conditions are required: that the value is 0.12 N / mm ² or more and that the back surface of the adhesion layer 14 is substantially flat and does not have a groove.

Although not included in Table 1 above, the same test was conducted on the wood flooring material 10 having a large adhesion force in which the adhesion layer 14 exceeds 0.14 N / mm ² , and all of them are the base material 20. Although it was not possible to peel off without water entering between them, if the adhesion of the adhesion layer 14 exceeds 0.18 N / mm ² , it will not be easily peeled off even if it is tried to be peeled off by hand, and it is suitable for remodeling. It wasn't. From this, it was confirmed that the adhesion of the adhesion layer 14 is preferably 0.18 N / mm ² or less in consideration of the ease of the reform work.

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 Coking material Four-sided wall 22 water

Claims (2)

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 having a substantially flat back surface on which no groove is formed is provided on the back surface side of the wood base material. A wood flooring material having an adhesion force of 0.12 to 0.18 N / mm ² according to a plane tensile test. The wood flooring material according to claim 1, 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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