JP2011047115A - Grooved flooring material - Google Patents

Abstract

[PROBLEMS] To combine a wooden base material manufactured by recycling wood scrap from a construction scrap and demolition work site and using it as a base plate, with excellent caster resistance and dimensional stability, and design Providing a grooved flooring material that is also superior in terms of cost in an advantageous manner.
A grooved floor material in which a surface decorative material B is adhered on a base plate A, and the base plate A includes an MDF layer 1, an intermediate moisture-proof sheet 2, a chipboard layer 3, and a bottom surface moisture-proof. In the surface decorative material B, which is formed by laminating the sheet 4 in this order and is stuck on the MDF layer 1, the decorative groove 5 is engraved at a depth that does not reach the chipboard layer 3 at the bottom. Grooved flooring.
[Selection] Figure 2

Description

  The present invention relates to a floor material grooved on the surface, and in particular, relates to a floor material grooved on a base plate and a floor material body formed by attaching a surface decorative material to the base plate.

  In recent years, wooden flooring that has been subjected to flooring finish with thermosetting resin paint, etc. is easy to clean and clean, and the occurrence of ticks that contribute to sick house syndrome is suppressed. Because of its advantages, its use is expanding rapidly, especially in apartment buildings.

  However, with the depletion of wood resources, it has become difficult to obtain solid wood, and the price has been rising. Various wood substrates such as plywood, laminated lumber, MDF (medium density fiberboard), particle board, etc. A surface decorative material such as a veneer is pasted on the material and the surface has a good appearance. For example, a wooden floor material designed in a woodgrain pattern is widely used.

  Conventionally, plywood has been generally used as a base material for wooden flooring, but various hardwoods, conifers, and other southern materials such as lauan, which are the raw materials for plywood, are also in short supply and their quality is also reduced. Therefore, in recent years, instead of plywood, various wooden boards such as MDF (medium density fiber board) or chipboard such as particle board and OSB (oriented strand board) are used as a base material. .

  For example, in the utility model registration No. 2592077 publication, both side edges in the length direction of the plate-shaped core material and on the upper surface of the base plate on which the end materials are respectively bonded along at least one of the end parts, There is disclosed a composite decorative flooring material comprising a composite material in which a surface base material is attached and a surface decorative material is provided on the surface base material.

  And a male ridge part for joining is formed on two adjacent sides among the side parts where the end material of the composite material is arranged, and a female ridge part corresponding to the male ridge part is formed on the remaining two sides. Further, the core material is composed of a particle board, the end material is composed of a material that has higher mechanical strength than the core material and can hold a nail, and the surface base material has a particle board and an expansion coefficient. The lower surface of the base plate is made of one or more selected from reconstructed materials such as medium fiberboard, particle board, hard board, wafer board, or oriented strand board. It is also stated that a backing material having a tensile property is attached to at least the region where the core material is disposed.

  In addition, as an effect, both side edges in the length direction of the plate-shaped core material warp and a dent is generated in the central part, which can prevent harmful valley warping during construction and also save high-grade timber. It is said that it can provide a composite decorative flooring that can cope with the depletion of natural wood resources and can also be expected to reduce costs.

Utility Model Registration No. 2592077

  In the composite decorative flooring described in Patent Document 1, since the surface base material is composed of a woody material whose expansion coefficient approximates that of the particle board used as the core material, it prevents the occurrence of valley warping. Although the effect that it can be constructed with good workability is obtained, there is a problem that a dent is generated when a load is applied by a caster such as a wagon.

  In addition, the dimensional change of the base plate including the core material is large due to moisture absorption, and the swell due to gaps and push-ups over time due to moisture from the floor and moisture and moisture from the floor surface of the bathroom, kitchen, etc. There is also a problem that occurs.

  The present invention was invented in view of the above-described background art, and used as a base plate by combining MDF (medium density fiberboard) and chipboard such as particle board and OSB (oriented strand board). It is an object of the present invention to provide a grooved flooring material having substantially the same quality as that of a wooden flooring material obtained from the base material and having excellent caster resistance, dimensional stability, and design properties.

  In order to solve the above-mentioned problem, the grooved flooring according to the first aspect of the present invention has a surface decorative material stuck on a base plate, and the base plate includes an MDF layer and an intermediate moisture-proof sheet. The chipboard layer and the bottom moisture-proof sheet are laminated in this order, and the decorative groove is cut to such a depth that the bottom of the decorative groove does not reach the chipboard layer. It is characterized by being provided.

  The above MDF (medium density fiberboard) is the thermal decomposition of sawdust and sawdust discarded from sawmills, timber processing scrap discarded from furniture factories, and building scraps discarded as waste from the construction site of wooden houses. , Of fiberboards obtained by mixing wood fibers obtained by treatment with an adhesive and heat-pressing, the density of which is 350 kg or more and less than 800 kg per cubic meter, and the MDF is dense and excellent in strength and processed Since it has good properties, it is preferably used as the upper layer of the base plate.

  The chipboard that forms the lower layer of the above-mentioned baseboard is composed of wood chips and bark discarded at sawmills, building waste materials discarded at the site of demolition work, packaging waste materials, etc. A particle board obtained by molding into a plate material together with a resin, or an OSB (oriented strand board) obtained by directing a thin and long piece of wood called a strand to be orthogonal to each other and compression-molding with an adhesive is used.

  Examples of the surface decorative material include veneers such as oak, birch, cherry, maple, zelkova, and pine. In addition to the above-mentioned veneer, a material in which a wood pattern of natural wood such as zelkova is designed on the surface of a plastic sheet processed into reinforced paper or a film is also used.

  For example, a surface decorative material in which a wood grain pattern is designed by printing or the like on the surface of various sheets such as polyolefin resins such as polyethylene, polypropylene, polystyrene, and polyvinyl chloride, and polyester resins such as polyethylene terephthalate and polybutylene terephthalate. be able to.

  Further, as the intermediate moisture-proof sheet, for example, a three-layer structure in which an upper paper layer and a lower paper layer are joined and integrated in a sandwich shape by a dry laminator on the upper and lower surfaces of a resin sheet that has been surface-treated in advance is used. For this bonding, a solvent-based adhesive is applied to the resin sheet, and an adhesive such as a vinyl adhesive or a urethane adhesive is applied to the surface of the resin sheet. The layers are laminated, pressure-bonded and integrated with a nip roll, and the lower paper layer is laminated and integrated on the back side of the resin sheet in the same process. At this time, as a surface treatment method for improving the adhesive strength of the resin sheet, a corona discharge treatment method, a plasma discharge treatment method, or the like is usually employed.

  As the resin sheet used for the intermediate moisture-proof sheet, for example, a resin sheet having a heat resistance temperature of 150 to 200 ° C. or higher, such as high density polyethylene, polyethylene terephthalate, polybutylene terephthalate, polyester, polyamide, etc. is preferable. Used.

  Examples of the upper and lower paper layers bonded to the upper and lower sides of the resin sheet include kraft paper, thin paper, Japanese paper, titanium paper, linter paper and the like of about 20 to 50 μm. Furthermore, various non-woven fabrics may be used in place of the above-described various paper bodies. Moreover, it is also possible to use metal foils, such as aluminum foil, instead of the said resin sheet.

  In addition, as a bottom moisture-proof sheet, the same thing as the said intermediate moisture-proof sheet can be used.

  Usually, in the grooved floor material, the thickness of the upper MDF is set to 0.5 to 6.0 mm, the thickness of the chip board is set to 2.5 to 15 mm, and the thickness of the chip board is made larger than the thickness of the MDF. Use. Further, the depth of the groove portion engraved on the surface decorative material adhered on the MDF layer constituting the upper layer of the base plate is set so that the bottom portion stays in the MDF layer and does not reach the chipboard layer. Groove is processed by adjusting the thickness.

  In the grooved flooring according to the first aspect of the present invention, a surface decorative material is stuck on a base plate, and the base plate includes an MDF layer, an intermediate moisture-proof sheet, a chipboard layer, and a bottom moisture-proof sheet. Are laminated in this order, and the MDF layer is disposed in the upper layer, so that the surface side of the base plate can be made relatively dense and hard, and has excellent caster resistance. Can do.

  In addition to the intermediate moisture-proof sheet, a bottom moisture-proof sheet is also attached to the bottom surface of the chipboard layer, so moisture from the floor surface of the bathroom, kitchen, etc. Intrusion into the inside can be prevented, and dimensional changes caused by moisture absorption / release and temperature changes of MDF, chipboard, etc. can be suppressed. Further, when both the intermediate moisture-proof sheet and the bottom moisture-proof sheet have tensile properties, both the intermediate moisture-proof sheet and the bottom moisture-proof sheet are difficult to expand and contract, and therefore have an effect of suppressing dimensional change. And even when it is used as a floor surface finishing floor material such as a floor heating device, the flooring construction with a good appearance can be performed with little dimensional change.

  For example, when the thickness of the MDF layer is 0.5 to 6.0 mm, the thickness of the chipboard layer is 2.5 to 15 mm, and the thickness of the chipboard layer is larger than the thickness of the MDF layer, the surface is rough. The chipboard layer can be hidden so that there is no problem in appearance, and it is possible to manufacture at a lower material cost by increasing the usage ratio of inexpensive chipboard.

  Furthermore, for example, a wood-grain-like surface decorative material stuck on the MDF layer is provided with a decorative groove such as a V-shaped groove with a depth at which the bottom does not reach the chipboard layer. Therefore, it is possible to efficiently obtain a grooved floor material that has little influence on strength reduction and that is excellent in design in a simple process.

The fragmentary sectional perspective view which shows the grooved flooring concerning this invention. The partially broken perspective view which shows the grooved flooring concerning this invention.

  Hereinafter, an embodiment of a grooved flooring according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a partial sectional perspective view showing an embodiment of a grooved flooring according to the present invention, and FIG. 2 is a partially broken perspective view. As shown in FIGS. 1 and 2, the grooved floor material has a surface decorative sheet as a surface decorative material B designed so that the wood grain flows in the longitudinal direction attached to a base plate A.

  That is, as shown in FIG. 1, the base plate A includes an MDF layer 1, an intermediate moisture-proof sheet 2, a chip board layer 3, and a bottom moisture-proof sheet 4 laminated and integrated in this order. The surface decorative material B is attached to the surface, and a decorative groove 5 is engraved from the surface decorative material B to the MDF layer 1.

  Here, the thickness a of the MDF layer 1 constituting the base plate A is in the range of 0.5 to 6.0 mm, the thickness b of the chipboard layer 3 is in the range of 2.5 to 15 mm, and the chipboard layer 3 is larger than the thickness a of the MDF layer. Further, the MDF layer 1 and the chip board layer 3 are combined and integrated by bonding with a known adhesive through the intermediate moisture-proof sheet 2, and the bottom moisture-proof sheet 4 is attached to the bottom surface of the chip board layer 3. ing.

  As the intermediate moisture-proof sheet 2 and the bottom moisture-proof sheet 4, the upper and lower surfaces of the high-density polyethylene resin sheet are subjected to corona discharge treatment, and thin paper having a thickness of about 30 μm is dry-laminated on the upper and lower surfaces with a urethane-based adhesive. A moisture-proof sheet having a three-layer structure is used.

  Further, the decorative groove 5 is engraved by adjusting the cutting depth with, for example, a V-shaped groove machine so that the depth of the groove portion remains in the MDF layer 1 and does not reach the chipboard 3 layer. The As shown in the drawing, when the decorative groove 5 is a V-shaped groove, the V-shaped angle α is preferably 60 to 120 °.

Next, a method for producing a grooved floor material according to the present invention will be described in detail by way of examples.
(Example)
Nippon Novapon Industrial Co., Ltd., which is a MDF layer 1 having a thickness a of 5 mm and having an upper layer of a regular (3 × 6) MDF, with a thickness b of 10 mm. A manufactured and fixed (3 × 6) particle board is arranged as a chipboard layer 3, and a bottom moisture-proof sheet 4 is laminated and integrated in this order on the bottom surface of the chipboard layer 3. A processed flooring was obtained.

  At this time, an aqueous vinyl urethane resin system is used as the adhesive, the press pressure is set to about 8 kgf / cm 2, and the pressure is maintained for about 10 minutes at room temperature to maintain the MDF layer 1, the intermediate moisture-proof sheet 2, the chipboard layer 3, and the bottom surface. The moisture-proof sheet 4 was integrally layered to form the base plate A.

  The surface decorative sheet as the surface decorative material B was adhered to the MDF layer 1 of the base plate A using the same aqueous vinyl urethane adhesive, to obtain a flooring main body whose surface was designed in a wood grain pattern. Further, the surface of the floor material body was cut with a V-shaped groove processing machine to provide a V-shaped decorative groove 5 having a bottom angle α of about 60 °.

  The inner surface of the decorative groove 5 is a cutting surface of MDF, but since MDF is a medium-density one that is hot pressed by mixing wood fiber with an adhesive, the cutting surface is dense, and There was no variation and the design of the exposed cut surface was good. Further, the decorative groove 5 cut from the surface decorative material B to the MDF layer 1 was adjusted so that the decorative groove 5 stays in the MDF layer 1 with a depth of about 0.7 mm as shown in FIG. .

  Next, the surface of the surface decorative material B is made of a thermosetting resin paint such as amino alkyd resin, vinyl resin, acrylic resin, epoxy resin, polyurethane resin, unsaturated polyester resin, isocyanate, alone, Or after applying so that the wood grain pattern might be utilized using the thermosetting resin paint modified arbitrarily, it heated and dried and obtained the grooved flooring concerning this invention.

  In the grooved floor material formed by the above-described method, the MDF layer 1 having a density of 350 kg or more and less than 800 kg per cubic meter is disposed in the upper layer, so that the surface side is dense and hard, and caster resistance is improved. An excellent floor surface was obtained. In addition, as shown in FIG. 2, the intermediate moisture-proof sheet 2 is adhered between the MDF layer 1 and the chipboard layer 3, and the bottom moisture-proof sheet 4 is adhered to the bottom surface of the chipboard layer 3. Therefore, it was possible to effectively prevent moisture absorption from the floor material due to moisture from the floor surface and moisture from under the floor.

  Further, since the decorative groove 5 is linearly recessed on the floor surface of the wood grain pattern, it is sharp and excellent in design, and thus has a floor surface excellent in impact resistance, and In addition, it was possible to produce a grooved flooring material excellent in moisture resistance by recycling waste wood resources without using high-grade wood.

  In the above-described embodiment, an example in which a particle board is used as the chip board layer 3 has been described. However, OSB (oriented strand board) may be used. Furthermore, other types of chipboards may be used, and thus the grooved floor material according to the present invention can be freely changed in design, and belongs to the technical scope of the present invention unless departing from the scope of the claims.

A Base plate B according to the present invention B Surface decorative material according to the present invention a MDF layer thickness b Chipboard layer thickness α V groove angle 1 MDF layer 2 Intermediate moisture-proof sheet 3 Chipboard layer 4 Bottom moisture-proof sheet 5 Cosmetic groove

Claims (1)

  A grooved floor material in which a surface decorative material is adhered on a base plate, and the base plate is formed by laminating an MDF layer, an intermediate moisture-proof sheet, a chipboard layer, and a bottom moisture-proof sheet in this order. A grooved floor material in which a decorative groove is engraved at a depth that does not reach the chipboard layer on the surface decorative material stuck on the MDF layer.

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