JP4565843B2 - Board for decorative board - Google Patents

Description

  The present invention relates to a decorative board used for a scratch-resistant floor, for example.

  For example, as a substrate used for a floor plate for scratch-resistant floor, at least as a single plate constituting the uppermost layer, a hard plywood laminated with a hard southern sea material having a specific gravity of 0.6 or more, such as Bankirai, Kempas, Batu, The composite plywood etc. which laminated | stacked the medium fiber board (MDF) on the normal plywood are used.

Japanese Patent Laid-Open No. 5-116105

  However, hard south sea materials and medium-quality fiberboards are more expensive than ordinary plywood and the like, and there is a problem that the entire substrate becomes expensive. In particular, it is difficult to obtain high-quality hard south ocean materials that can be used as a single plate constituting the uppermost layer of plywood. There is also a problem that a substrate using a hard southern sea material as a single plate constituting the uppermost layer cannot be used for a light-colored floor board.

  Also, the floorboard substrate used for scratch-resistant floors for floor heating is subject to changes in internal stress with temperature changes and may cause cracks, so stick a medium fiberboard on the surface of plywood. It is necessary to prevent cracks from occurring, but in order to suppress warping of the medium fiberboard accompanying temperature changes, the thickness of the medium fiberboard must be reduced to about 0.6 mm.

  However, if the thickness of the medium fiberboard is reduced, sufficient surface hardness cannot be secured. Therefore, in order to compensate for the decrease in surface hardness, at least the single layer constituting the uppermost layer is used instead of ordinary plywood. There is a problem that a hard plywood laminated with hard southern materials must be used as the plate, and the cost is increased.

  Therefore, an object of the present invention is to provide a decorative board substrate that can ensure a sufficient surface hardness without using an expensive wooden material such as a hard southern sea material or a medium fiberboard.

In order to solve the above-mentioned problem, the invention according to claim 1 is a substrate for a decorative board formed of plywood, and a single board constituting the uppermost layer of the plywood extends along the fiber. , there is provided a substrate for decorative laminates, characterized in that the adhesive is have a large number of cracks were filled.

As mentioned above, the board | substrate for decorative boards of the invention which concerns on Claim 1 is formed of the plywood , The adhesive which the single board which comprises the uppermost layer of the plywood extends along the fiber is the adhesive. since have a large number of cracks filled, adhesive filled in the crack surface hardness of the plywood by curing increases when stacking the top layer of veneer, as in the prior art, the top layer Even if you do not use a hard plywood with a specific gravity of 0.6 or more, or a composite plywood with a medium fiberboard laminated to a normal plywood, the same surface hardness can be achieved. Can be secured.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 shows a substrate used for a floor board for a floor heating floor. As shown in FIG. 2, the substrate 1 has a plurality of grooves 11a formed at a predetermined pitch on the outer surface of a substrate body 11 formed of a wood material such as a 5-ply plywood, and the resin compound 12 is formed in the grooves 11a. The groove 11a cuts the outer surface of the substrate body 11, or heats or cools the outer surface of the substrate body 11 with a metal roll having a large number of protrusions on the outer peripheral surface. For example, it can also be formed by a so-called “burnout” method in which the outer surface of the substrate body 11 is burned off by a laser beam or the like.

  As described above, in the substrate 1, since the resin compound 12 is filled in the numerous grooves 11a formed on the surface side of the substrate body 11 made of a wood material, the resin compound 12 filled in the grooves 11a. As the substrate body 11 is cured, the surface hardness of the substrate body 11 is increased, and even if an inexpensive ordinary plywood plywood board that does not have sufficient surface hardness is used as the substrate body 11, sufficient surface hardness can be ensured. it can.

  FIG. 3 shows another embodiment of a substrate used for a floor board for a floor heating floor. As shown in FIG. 4, the substrate 2 is formed of a five-ply plywood formed by laminating five single plates 21 to 25, and constitutes the uppermost layer among the five single plates 21 to 25. A large number of grooves 21a filled with an adhesive 26 are formed on the inner surface side of the single plate 21 that is formed, and the single plate 21 having a large number of grooves 21a formed on the inner surface by various methods as described above. Is laminated on the veneer 22 via the adhesive 26, and the adhesive 26 is filled in the groove 21a.

  As described above, the substrate 2 is formed of a 5-ply plywood having a plurality of grooves 21a filled with the adhesive 26 on the inner surface side of the single plate 21 constituting the uppermost layer. When the single plate 21 is laminated, the adhesive 26 filled in the grooves 21a is hardened to increase the surface hardness of the 5-ply plywood, and the specific gravity is 0.6 or more as the uppermost single plate as in the past. The surface hardness equivalent to these can be ensured without using a hard plywood obtained by laminating a hard southern ocean material, or a composite plywood obtained by laminating a medium fiberboard on a normal plywood.

  FIG. 5 shows another embodiment of a substrate used for a floor board for a floor heating floor. As shown in FIG. 6, the substrate 3 is also formed by a five-ply plywood formed by stacking five single plates 31 to 35, and constitutes the uppermost layer among the five single plates 31 to 35. The single plate 31 has a large number of cracks 31a filled with the adhesive 36 extending along the fiber direction, and the cracks 31a are filled with the adhesive. The crack 31a is formed by pulling the single plate 31 in a direction orthogonal to the fiber direction, and the single plate 31 having a large number of cracks 31a is laminated on the single plate 32 via the adhesive 36. In this case, the adhesive 36 is filled in the crack 31a.

  As described above, the substrate 3 is formed of a 5-ply plywood having a single plate 31 constituting the uppermost layer and extending along the fiber and having a number of cracks 31a filled with the adhesive 36. Therefore, when the uppermost single plate 31 is laminated, the adhesive 36 filled in the cracks 31a is cured, so that the surface hardness of the 5-ply plywood is increased. Even if it does not use the hard plywood which laminated | stacked the hard south ocean material whose is 0.6 or more, the composite plywood which laminated | stacked the medium fiber board on the normal plywood, etc., surface hardness equivalent to them can be ensured.

  Examples of the present invention will be described below, but it goes without saying that the present invention is not limited to the following examples.

Example 1
As the uppermost layer, by cutting the surface (upper surface) of a normal plywood for flooring in which a single plate made of red meranti having a thickness of 1.0 mm and a specific gravity of 0.45 is laminated, on the surface of the normal plywood for flooring, A number of grooves having a width of 1 mm and a depth of 0.9 mm extending along the fiber direction of the uppermost single plate were formed at a pitch of 3.5 mm. Filling the formed grooves with a two-component urethane resin by spreading a solvent-free two-component urethane resin as a resin compound on the surface of the normal plywood for floor boards in which a large number of grooves are formed in this way After that, it was immediately scraped uniformly with a knife coater, and this was left in an atmosphere of 60 ° C. for 1 hour to cure the two-pack urethane resin filled in the groove. In addition, the total application amount of the two-component urethane resin on the surface of the ordinary plywood for floor board in which a large number of grooves were formed was 350 g / m ² .

(Example 2)
As the uppermost layer, by cutting the surface (upper surface) of a normal plywood for flooring in which a single plate made of red meranti having a thickness of 1.0 mm and a specific gravity of 0.45 is laminated, on the surface of the normal plywood for flooring, A number of grooves having a width of 1 mm and a depth of 0.9 mm extending along the fiber direction of the uppermost single plate were formed at a pitch of 3.5 mm. Filling the formed grooves with a two-component urethane resin by spreading a solvent-free two-component urethane resin as a resin compound on the surface of the normal plywood for floor boards in which a large number of grooves are formed in this way Immediately after scraping uniformly with a knife coater, sticking Japanese paper with a basis weight of 30 g / m ² , and then leaving it in an atmosphere of 60 ° C. for 1 hour to fill the groove with a two-component urethane resin Was cured. In addition, the total application amount of the two-component urethane resin on the surface of the ordinary plywood for floor board in which a large number of grooves were formed was 350 g / m ² .

(Example 3)
As the uppermost layer, the surface (upper surface) of a normal plywood for flooring laminated with a single plate of 1.0 mm thick and 0.40 specific gravity is projected on the outer peripheral surface with a width of 0.8 mm and a height of 0.6 mm. The surface of a normal plywood for floor boards is pressed by pressing a metal roll having a strip formed at a pitch of 3.0 mm at a linear pressure of 60 kg / cm and a moving speed of 10 m / min with the outer peripheral surface heated to about 300 ° C. In addition, a large number of grooves having a width of 1.0 mm and a depth of 0.5 mm extending along the fiber direction of the uppermost single plate were formed. By distributing an acrylic resin emulsion having a solid content of 65% as a resin compound on the surface of the ordinary plywood for floor boards in which a large number of grooves are formed in this way, the inside of the formed grooves The acrylic resin emulsion was filled in and immediately scraped uniformly with a reverse roll, and this was left to stand in an atmosphere of 50 ° C. for 30 minutes to dry the acrylic resin emulsion filled in the groove. In addition, the total application amount of the acrylic resin emulsion on the surface of the common plywood for floor board in which a large number of grooves were formed was 250 g / m ² .

Example 4
As the uppermost layer, the surface (upper surface) of a normal plywood for flooring laminated with a single plate of 1.0 mm thick and 0.40 specific gravity is projected on the outer peripheral surface with a width of 0.8 mm and a height of 0.6 mm. The surface of a normal plywood for floor boards is pressed by pressing a metal roll having a strip formed at a pitch of 3.0 mm at a linear pressure of 60 kg / cm and a moving speed of 10 m / min with the outer peripheral surface heated to about 300 ° C. In addition, a large number of grooves having a width of 1.0 mm and a depth of 0.5 mm extending along the fiber direction of the uppermost single plate were formed. By distributing an acrylic resin emulsion having a solid content of 65% as a resin compound on the surface of the ordinary plywood for floor boards in which a large number of grooves are formed in this way, the inside of the formed grooves Acrylic resin emulsion is immediately filled in, scraped uniformly with a reverse roll, and a Japanese paper with a basis weight of 30 g / m ² is pasted, and then left in an atmosphere of 50 ° C. for 30 minutes to fill the groove. The resulting acrylic resin emulsion was dried. In addition, the total application amount of the acrylic resin emulsion on the surface of the common plywood for floor board in which a large number of grooves were formed was 250 g / m ² .

(Example 5)
When manufacturing a normal plywood for flooring, in which a single plate made of yellow meranti having a thickness of 1.2 mm and a specific gravity of 0.42 is laminated as the uppermost layer, the uppermost layer is sheared parallel to the fibers. By applying force, a number of cracks extending in the fiber direction are formed, and 350 g / m ^{2 of an} adhesive made of urea melamine is applied to the surface (upper surface) of the veneer constituting the second layer, A single plate with a crack formed thereon was placed, and an adhesion treatment was performed in an atmosphere at 130 ° C. for 7 minutes. When a single plate other than the single plate constituting the uppermost layer is bonded to the lower single plate, the amount of adhesive applied to the surface (upper surface) of the lower single plate is 120 g / m ² .

(Example 6)
When manufacturing the normal plywood for flooring, in which the single layer made of red meranti having a thickness of 1.2mm and specific gravity of 0.45 is laminated as the uppermost layer, the back surface (lower surface) of the single plate constituting the uppermost layer is cut. By doing so, a large number of grooves having a width of 1.1 mm and a depth of 0.8 mm extending along the fiber direction of the uppermost single plate are formed at a pitch of 3.3 mm, and the single plate constituting the second layer is formed. on the surface (upper surface), while the adhesives 400 g / m ² coating the solid content of 70% of the epoxy-modified acrylic emulsion formulation, placing a veneer which many grooves are formed on the back surface, an atmosphere of 130 ° C. The adhesion treatment was carried out for 8 minutes underneath. When a single plate other than the single plate constituting the uppermost layer is bonded to the lower single plate, the amount of adhesive applied to the surface (upper surface) of the lower single plate is 120 g / m ² .

(Example 7)
By cutting the surface (upper surface) of an oriented strand board (OSB) having a thickness of 12 mm using aspen material as soft wood as the main material, the surface of the oriented strand board has a width of 2 mm and a depth of 2 mm. Many grooves were formed at a pitch of 4 mm. By filling the surface of the oriented strand board in which a large number of grooves are formed in this way with a solvent-free two-component urethane resin as a resin compound, the two-component urethane resin is filled in the formed grooves. After that, the surface is smoothed by scraping uniformly with a knife coater, and a polyolefin sheet having a thickness of 200 μm is pasted, and then left in an atmosphere of 40 ° C. for 3 hours to fill the groove. The two-part urethane resin formulation was cured. The total amount of the two-component urethane resin applied to the surface of the oriented strand board on which many grooves were formed was 1300 g / m ² .

  A DuPont-type impact deformation test defined in JIS K 5600-5-3: 1990 was performed on the above-described Examples 1 to 7 and each pre-treatment blank serving as the base of each Example, and the results are shown in Table 1. Indicated.

  As can be seen from Table 1, each of the substrates (blanks after treatment) of Examples 1 to 7 has a smaller average dent amount after the impact deformation test than the blank before treatment that is the base of each substrate. The surface hardness of the substrate has increased. In particular, it can be seen that Examples 2 and 4 in which Japanese paper or a resin film is adhered are excellent in scratch resistance. Therefore, it becomes possible to use it as a board | substrate of the floor board for a scratch-resistant floor by performing the above processes with respect to the soft wooden material which could not be used conventionally.

  In the above-described embodiment, when the groove is formed on the surface of the substrate body, a plywood or an oriented strand board is used as the base wood material. However, the present invention is not limited to this. Woody material can be used.

  In the above-described embodiment, a solvent-free two-component urethane resin, an acrylic resin emulsion, urea melamine, or an epoxy-modified acrylic emulsion compound is used as the resin compound or adhesive filling the groove or crack. However, the present invention is not limited to this, and various resin blends and adhesives having toughness can be used.

  Also, the grooves and cracks formed in the wood material should be narrow and deep, but it is technically difficult to fill the narrow and narrow grooves with resin compounds and adhesives with high viscosity. The grooves and cracks are desirably set to have a width in the range of 0.5 to 2.0 mm and a depth in the range of 0.3 to 1.5 mm.

  Further, the ratio of the wood part in the surface or the surface layer part of the wood material is required to be 50% or more, and the groove pitch is preferably set to 6 mm or less. If the ratio of the wood part on the surface of the wood material or the surface layer part is less than 50%, when paper or a veneer is pasted on the surface, there will be no air escape and the air will burst, and the groove pitch will exceed 6 mm. This is because sufficient surface hardness cannot be ensured.

  Further, as described above, the resin blend can be sprayed as well as distributed on the surface of the wooden material.

  Moreover, although each embodiment mentioned above demonstrated the board | substrate used for the floor board for floor heating floors, it is not limited to this, It cannot be overemphasized that it can be used as a board | substrate for various decorative boards. Nor.

It is sectional drawing which shows one Embodiment of the board | substrate concerning this invention. It is sectional drawing which shows the board | substrate body which comprises the board | substrate same as the above. It is sectional drawing which shows the board | substrate which is other embodiment. It is sectional drawing for demonstrating the manufacturing method of a board | substrate same as the above. It is sectional drawing which shows the board | substrate which is other embodiment. It is sectional drawing for demonstrating the manufacturing method of a board | substrate same as the above.

Explanation of symbols

1, 2, 3 Substrate 11 Substrate body 11a Groove 12 Resin compound 21-25 Single plate 21a Groove 26 Adhesive 31-35 Single plate 31a Crack 36 Adhesive

Claims (1)

A board for a decorative board formed of plywood,
The top layer constitutes a by which veneer, extending along the fiber, a substrate for a decorative plate in which adhesive is characterized in that it have a large number of cracks were filled with the plywood.

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