JP2022020175A - Floor sheet material to be stuck over - Google Patents

Abstract

To provide a sheet material to be stuck over that can be stuck directly on an existing floor and also has shock resistance and soundproof performance to a certain extent, and is thin in thickness, and that is free of diffusion of formaldehyde.SOLUTION: A floor sheet material to be stuck over consists, in order from a top surface, of a first layer formed of natural wood covered with a coating, a second layer formed of a hard fiber plate, and a third layer formed of natural cork material. The first layer and the second layer, and the second layer and the third layer are bonded together with an aqueous polyurethane resin-based adhesive, and the sheet material has overall thickness suppressed to substantially 4.0 mm.SELECTED DRAWING: Figure 1

Description

The present invention relates to a floor sheet material for top-pasting used for renovation work of a house.

As flooring materials for home interiors, wood flooring is mainly used instead of tatami mats in living rooms and kitchens other than Japanese-style rooms. Wood flooring has a painted finish on its surface, but has drawbacks such as sunburn, scratches, and warpage due to drying. In addition, as a construction method, it is often directly attached to structural plywood or slabs, which makes it difficult to remodel such as replacement.

Patent Document 1 discloses an invention made in view of the above problems.
The technique disclosed in Patent Document 1 refers to the title of the invention as "floor material sheet", and has an object of "providing a floor material sheet for reform that can be directly attached on a wood flooring", and the solution thereof is "a floor material sheet". A structure in which a transparent resin protective layer, a base sheet, a foamed resin layer, an adhesive layer, and a release sheet are laminated in this order, and at least one of the transparent resin protective layer, the base sheet, and the foamed resin layer is decorated. It may be a layered structure that omits the base sheet. Since the release sheet can be peeled off and easily pasted, it can be easily pasted directly on the wood flooring and reformed, and the floor after construction has cushioning properties. It will be something. "

Japanese Unexamined Patent Publication No. 11-182009

On the other hand, if the floor level of the rooms where the wood flooring is used is the same and the rooms are separated by a door, and the clearance between the door and the floor surface is only about 10 mm, "directly from the top of the wood flooring. It is necessary to limit the thickness of the "floor material sheet for reform that can be pasted". Furthermore, it is required to prevent the emission of formaldehyde, which causes sick building syndrome, even in the remodeling work.

Therefore, the problem to be solved by the present invention is that it can be directly attached to an existing floor, has impact resistance and soundproofing performance to some extent, and is a thin sheet material that does not emit formaldehyde. The purpose is to provide a sheet material for pasting.

In order to achieve the above problems, the floor sheet material for top-pasting according to claim 1 of the present application is a laminated sheet material to be over-pasted on an existing residential floor, and is naturally coated with a coating film in order from the surface. It consists of a first layer formed of wood, a second layer formed of a hardboard, and a third layer formed of natural cork, the first layer and the second layer. The layer and the second layer and the third layer are characterized in that they are bonded to each other with an aqueous polyurethane resin-based adhesive.
The floor sheet material for top-pasting according to claim 2 of the present application is the floor sheet material for top-pasting according to claim 1, and the thickness of the first layer is 0.25 mm. The thickness of the second layer is 1.0 mm, and the thickness of the third layer is 2.75 mm.

The invention of the present application has the following effects due to the above configuration.
(1-1) Since the floor sheet material for top-pasting according to the present invention has a first layer formed of natural wood coated with a coating film on the surface layer, the hardness of the surface is adjusted by the coating film. It is possible to prevent scratches and sunburn, and at the same time, it is possible to maintain the texture and luxury of natural wood.
(1-2) Since the second layer immediately below the first layer is made of a hard fiber board of natural wood, the first layer is scratched and the scratch penetrates the first layer. Even if it reaches the second layer, it will stop there.
(1-3) Further, since the third layer is made of natural cork material, the sound insulation performance is improved, and the water content of the cork itself is stable at about 8% and does not deform. The warp of the floor sheet material itself is reduced.
(1-4) By using a water-based polyurethane resin adhesive for bonding between layers and carefully selecting the wood used for the first layer to the third layer, the generation of formaldehyde that causes sick house syndrome can be generated. Can be prevented.
(2-1) Since the thickness of the first layer is 0.25 mm, the thickness of the second layer is 1.0 mm, and the thickness of the third layer is 2.75 mm, the floor sheet for overlaying is used. The thickness of the material is approximately 4.0 mm, according to the applicant's knowledge, when the floor levels of the rooms where the wood flooring is used are the same and the rooms are separated by indoor doors, the thickness of the floor sheet material. If it is set to 4.0 mm, the interior door can be opened and closed smoothly, and there is no problem even if it is overlaid.
(2-2) And, setting the thickness of the third layer to 2.75 mm is the limit of the limited thickness of the floor sheet material, and maximizes the effect of the natural cork material. can do.

FIG. 1 is a cross-sectional exploded configuration diagram of a floor sheet material for top-pasting according to the present invention.

An example according to the embodiment for carrying out the present invention will be described with reference to FIG. In FIG. 1, reference numeral 1 is a floor sheet material for overlaying according to an embodiment, reference numeral 11 is a first layer, reference numeral 12 is a second layer, reference numeral 13 is a third layer, and reference numeral 15 is an adhesive. Layer of.

First, the configuration of the floor sheet material 1 for top-pasting according to the embodiment will be described.
The floor sheet material 1 for top-pasting is a long sheet material formed by stacking thin plates, and is mainly a first layer 11 formed of natural wood coated with a coating film in order from the surface, and hard. It is composed of a second layer 12 formed of a hardboard and a third layer 13 formed of a natural cork material, the first layer 11, the second layer 12, and the third layer 13. An adhesive layer 15 is interposed between the layers, and the layers are bonded to each other with an aqueous polyurethane resin-based adhesive.

In the examples, oak of natural wood is used for the first layer 11, but by using cedar and cypress, which are thinned wood with beautiful grain, the aesthetics are improved, and it is also environmentally friendly and nature conservation. It will be connected. Further, since the surface of the first layer 11 is coated with a transparent coating, it is possible to improve the durability and wear resistance. In the embodiment, UV curable coating is applied, and the hardness after coating is 3H or more.

The second layer 12 formed of the hardboard is a plate formed mainly from wood, which is mainly made of waste materials such as plywood lauan core, veneer scraps, and sawn wood waste, and has a smooth and hard surface. Has strong bending strength. Therefore, scars on the first layer can be prevented by the second layer.

Since the third layer 13 made of natural cork material uses porous and elastic natural cork, it has excellent sound absorption and can reduce squeak noise during walking, which makes walking comfortable. A feeling is obtained and heat retention is also improved.

As described above, since the thickness of the floor sheet material 1 for top-pasting is approximately 4.0 mm, the floor sheet material is easy to bend, and when rolled into a cylindrical shape, its diameter becomes about 300 mmφ, and the size of the floor sheet material is 120 mm in width. Even if it is × 909 mm, it is easy to carry. The floor sheet material 1 for top-pasting can be used as a ceiling material or a wall material by applying a nonflammable paint.

Here, the "formaldehyde radiation amount test" by the glass desiccator method conducted at the Tsukuba Building Test and Research Center of Better Living in June 2nd year of Reiwa will be described for the floor sheet material for top-pasting.
[Test method]
The floor sheet material for top-pasting shall be the desiccator method specified in the Formaldehyde Emission Building Material Performance Evaluation Business Method Manual (Revised on December 1, 2011, Better Living).
[Test results]
Specimen dimensions: 150 mm x 50 mm x 4 mm
Constituent material of test piece: Floor sheet material for top-pasting Same composition as floor sheet material for top-pasting Date of manufacture: May 2020 Curing conditions at the time of manufacture: Manufactured under normal temperature conditions of 15 ° C to 5 ° C Curing period: 3 days Packing method of test piece: Wrapped in aluminum foil and sealed with plastic wrap [Test result]
Test environment: Temperature 20 ° C ± 0.5 ° C
Number of test pieces: 11 (sheets / desiccator)
Formaldehyde emission: 0.09 (mg / L) on average
Maximum 0.09 (mg / L)
* The amount of formaldehyde emission was significantly lower than the strictest emission amount (average value 0.3 mg / L) set by the Ministry of Agriculture, Forestry and Fisheries.

1 Floor sheet material for top-pasting according to the examples 11 First layer 12 Second layer 13 Third layer 15 Adhesive layer

Claims (2)

It is a laminated sheet material that is overlaid on the existing residential floor.
From the surface, it consists of a first layer formed of natural wood coated with a coating film, a second layer formed of a hardboard, and a third layer formed of natural cork material.
A floor sheet material for overlaying, wherein the first layer, the second layer, the second layer, and the third layer are bonded to each other with an aqueous polyurethane resin-based adhesive. The first layer has a thickness of 0.25 mm, the second layer has a thickness of 1.0 mm, and the third layer has a thickness of 2.75 mm. The sheet material for the floor for pasting according to claim 1.

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