JP2001129810A - Wood material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wood material which is highly resistant to cracking and caster and besides, is excellent in water-resistance. SOLUTION: The wood material 1 is composed of a base board 6 and a decorative veneer 5, between which a rigid resin plate 9 is sandwiched and bonded. The rigid resin plate 9 is formed of a regenerated resin. In addition, a recessed groove 2 is formed penetrating the decorative veneer 5 and reaching the rigid resin plate 9, on the surface 1A side of the wood material 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a wood material having a base plate and a decorative veneer, and more particularly to a wood material having high crack resistance and caster resistance and improved water resistance.

[0002]

2. Description of the Related Art Conventionally, a wood material in which a decorative veneer such as a cedar veneer is adhered to a base plate such as a plywood or an OSB material has been widely known. This wood material has high design properties, but is relatively inexpensive as compared with a single-plate wood material, and thus is used for various purposes as a building material. When such a wooden material is used in a place that is easily worn, such as a floor, a staircase, or an edge, it is necessary to increase crack resistance and caster resistance. For this reason, various wood materials have been conventionally researched and developed in order to improve crack resistance and caster resistance.

[0003]

For example, there is a wood material that is bonded by sandwiching paper between a base plate and a decorative veneer. this is,
Paper sandwiched between the base plate and decorative veneer relieves the stress generated in the base plate and decorative veneer, and therefore has high crack resistance. However, since this wooden material only sandwiches paper, the caster resistance is almost the same as that of a wooden material obtained by simply attaching a decorative veneer to a base plate.

There is also known a wood material in which a medium fiberboard (MDF) is bonded between a base plate and a decorative veneer. This is because the MDF is somewhat hard, so that not only crack resistance is high but also caster resistance is excellent. However, such wood materials have poor water resistance. Specifically, as shown in FIG. 5A, some of the wood materials using the MDF include the wood material 7 in order to enhance the design of the wood material 70.
There is one in which a V-shaped concave groove 75 is formed on the surface 70A side (upper side in the figure) of the zero. When water is applied to the wooden material 70, as shown in FIG. 5B, a problem occurs in that the MDF 72 exposed near the bottom 75C of the concave groove 75 absorbs water and swells. In particular, the MDF 72 swells significantly compared to the plywood or veneer used for the base plate 73 and the veneer veneer 71,
The water-wetted portion of F72 swells greatly.

[0005] Further, even in such a wooden material without the concave groove 75, for example, a part of the decorative veneer 71 is peeled off or worn, so that the MDF 72 is partially exposed. When water is applied, similarly, the MDF 72 absorbs water and the portion swells. As described above, the wood material sandwiching the MDF is excellent in crack resistance and caster resistance, but is not good in water resistance. Note that the wood material 7 shown in FIG.
Numeral 0 indicates that the MDF 72 is sandwiched between a base plate 73 made of a plywood made of rawan and a veneer veneer 71 made of a cedar veneer.

The present invention has been made in view of such circumstances, and has as its object to provide a wood material having high crack resistance and caster resistance and excellent water resistance.

[0007]

Means for solving the problems, functions and effects are achieved by a base plate, a decorative veneer, a hard resin plate sandwiched between the base plate and the decorative veneer and bonded to each other. And a wood material comprising:

According to the present invention, a hard resin plate is sandwiched between the base plate and the decorative veneer. Hard resin board is harder than paper and medium fiber board (MDF) which has been conventionally used for wooden materials, so even if external force is applied,
Hard to break or deform. For this reason, the wood material of the present invention suppresses cracking of the decorative veneer and cracking of the decorative veneer from the hard resin plate in between even if stress is applied to the decorative veneer or the base plate. Is done. Further, even if a large external force is applied to the decorative veneer, the hard resin plate suppresses the deformation of the wooden material. That is, this wood material is excellent in crack resistance and caster resistance.

Further, since the hard resin plate has low water absorption,
Even when immersed in water, it does not swell by absorbing water like MDF, and its shape is maintained. Therefore, even if this wood material is wet with water, for example, when the decorative veneer is partially peeled off or worn, and the underlying hard resin plate is exposed, the hard resin plate has low water absorption, It is hard to be deformed, so the wood itself is hard to be deformed in that part. In other words, this wood material
Also excellent in water resistance. Therefore, the wood material of the present invention has high crack resistance and caster resistance, and also has excellent water resistance.

Here, the decorative veneer may be appropriately selected in consideration of the use of the wood material and the design of the appearance, and examples thereof include veneers such as cedar veneer, hinoki and oak. The base plate may be appropriately selected in consideration of the use and cost of the wooden material, but may be, for example, a plywood or an OSB material, or a single plate. Depending on the application of the wood material, the hard resin plate may be considered for its hardness based on the required crack resistance and caster resistance, or may be considered for its adhesion to decorative veneers and base plates, or It may be appropriately selected in consideration of cost. For example, polyethylene (PE), polypropylene (PP), styrene-butadiene-acrylonitrile copolymer (ABS), polyvinyl chloride (PVC)
Such as addition polymerization resins, condensation resins such as polyethylene terephthalate (PET), and phenol resins (PF)
A resin plate made of an addition condensation resin such as alkyd resin, a polycondensation resin such as an alkyd resin, a ring-opening polymerization resin such as an epoxy resin (EP), a polyaddition resin such as a polyurethane (PUR), or an ion exchange resin. Is mentioned. Also,
These resins are reinforced with glass fiber or carbon fiber.
Hard resin plates in which a reinforcing material is mixed with a resin, such as RP, are also included in these.

In order to make wood materials look more beautiful,
The surface of a wooden material is subjected to a coloring treatment (base treatment), that is, for example, a colored paint such as brown is formed on a surface of a veneer veneer such as a conduit, or a concave groove is formed on a surface of the wooden material as described later. When the groove is provided, the groove may be coated and filled. Further, a paint layer made of a clear paint or the like may be formed on the surface of the wooden material.

[0012] Further, it is preferable that the hard resin plate is made of a recycled resin.

As described above, by using a hard resin plate made of a recycled resin as the hard resin plate, it is possible to utilize the recycling, which has been particularly emphasized in recent years. Further, since the hard resin plate is sandwiched between the base plate and the decorative veneer and is hidden inside the wooden material, it is often invisible from the front and back surfaces of the wooden material. For this reason, as for the appearance of the hard resin plate, if it has a predetermined shape (a flat plate shape), its color and the like are not particularly problematic. In other words, a wooden material using a hard resin plate made of a recycled resin is not inferior in appearance in terms of product value even when compared with a wooden material using a hard resin plate made of a resin that is not a recycled resin.

Further, the properties of wood materials using recycled resin, such as crack resistance, caster resistance, and water resistance, are as follows:
There is almost no difference from wood materials using resin that is not recycled resin. Moreover, a hard resin plate made of a recycled resin is often relatively inexpensive as compared with a hard resin plate that is not a recycled resin, and therefore, a wooden material can be made inexpensive.

Further, it is preferable that the wooden material according to any one of the above, further comprising a concave groove extending from the surface on the decorative veneer side to the hard resin plate.

Some wood materials have grooves formed on the surface (the decorative veneer side) in order to enhance the design. Specifically, for example, when a plurality of concave grooves are arranged vertically and horizontally at a predetermined interval, and when the wooden material is viewed from the front side, there is a wooden material that exhibits a lattice pattern, a stripe pattern, or the like due to the concave grooves. Usually, the thickness of the decorative veneer is 1 mm or less,
In the case of a wooden material having a groove, the size (depth) of the groove is such that it penetrates the decorative veneer and is formed to a layer below the groove in consideration of the design property of the wooden material due to the groove. There are many.

For this reason, for example, in a wood material using MDF, as described above, MDF is exposed near the bottom of the groove. When the surface of such a wood material gets wet with water, MDF
In the exposed portion, there is a problem that water easily swells and the wood material is partially deformed (see FIG. 5B). Further, even when the surface of the wooden material is painted, if the inner wall surface of the concave groove is not sufficiently painted, the MDF similarly absorbs water and swells when exposed to water.
Furthermore, even when the inner wall of the groove is sufficiently coated, when water is applied, the water penetrates the paint layer and the MDF
, And the MDF may swell by absorbing water.

On the other hand, in the present invention, although the concave groove penetrates the decorative veneer and reaches the hard resin plate,
Even if the wood material is wet with water, the hard resin plate hardly deforms because of its low water absorption and high water resistance. Therefore, the woody material of the present invention is not only improved in designability by the groove, but also has sufficiently high water resistance.

In the case of a wooden material in which the inside of the groove is not painted and a part of the hard resin plate is exposed near the bottom surface of the groove, the color tone of the hard resin plate approximates the color tone of the decorative veneer. Preferably, the color tone is used. In this way, when looking at the wood material from the veneer side, the color tone of the part where the groove is formed and the other part will look almost the same, and the color tone of the whole wood material will be unified. Can be. Further, the color tone of the hard resin plate may be different from the color tone of the decorative veneer. With this configuration, when the wooden material is viewed from the decorative veneer side, the color tone is different between the portion where the groove is formed and the other portion, so that the design of the groove can be further emphasized.

[0020]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an overall view of the wood material 1 of the present embodiment, and FIG. This wood material 1 is a wood material 1 for a floor, and as shown in FIG. 1, has a substantially rectangular shape having a size of 90 cm × 180 cm in plan view and a substantially plate shape having a thickness of 12 mm. On the surface 1A side (upper side in the figure), a lateral direction (right and left direction in the figure)
In addition, two V-shaped concave grooves 2 connected from end to end are formed so as to divide the wooden material 1 into three equal parts, and also, in the vertical direction (up and down direction in the figure), from the end. Five V-shaped concave grooves 2 connected to the ends are formed so as to divide the wood material into six equal parts. Therefore, when the wooden material 1 is viewed from the surface 1A side, a lattice pattern is seen by the concave grooves 2. Therefore, this wood material 1
Has been enhanced in design as a building material for floors.

As shown in FIG. 2, the wooden material 1 has a base plate 6 which is a plywood in which five layers of lauan veneers 7 are laminated, and a decorative veneer 5 which is a cedar veneer. Between, PET
Are sandwiched and adhered to each other. The base plate 6 is formed by alternately arranging wood grain of a veneer 7 having a thickness of about 2 mm in a vertical and horizontal direction. The thickness of the base plate 6 is about 1
0 mm, the thickness of the decorative veneer 5 is about 0.25 mm, and the thickness of the hard resin plate 9 is about 1.2 mm.

The V-shaped groove 2 has a depth of about 1
mm, the surface of the decorative veneer 5 (the surface 1 of the wooden material 1)
A) to the hard resin plate 9. Therefore, the hard resin plate 9 is exposed near the bottom 2C of the groove 2. Although not shown, a brown colored paint is filled and applied to the inside of the concave portion such as the conduit and the inner wall surface of the V-shaped concave groove 2 on the surface of the decorative veneer 5. Therefore, this wood material 1
Is the lattice pattern of the wood veneer and the groove 2 of the veneer veneer 5,
Looks beautiful with emphasis on colored paint. In addition, wood material 1
In order to make the wooden material 1 look beautiful and to protect the surface 1A of the wooden material 1, a paint layer of a clear paint (not shown) is formed using a roll coater on the surface 1 </ b> A.

The hard resin board 9 of the wood material 1 is harder than a conventionally used paper or medium fiber board (MDF), and is hard to break or deform. Therefore, even if an external force is applied to the wooden material 1 or a stress is applied to the decorative veneer 5 or the base plate 6, the wooden material 1 is not cracked or deformed. For example,
About this wooden material 1, a crack resistance test, that is, 80
C. × 2 hr to −20 ° C. × 2 hr as one cycle,
Even if a heat cycle test is performed for 0 cycles, and a test for measuring the length of all generated cracks is performed after the test, almost no cracks occur. The crack resistance is almost the same or better than the conventional wood material in which paper or MDF is sandwiched between the base plate 6 and the decorative veneer 5 described above.

For example, for this wooden material 1, a caster resistance test, that is, a caster with a load of 20 kg
Even when the test is performed for 000 reciprocations and the depth of the generated dent is measured after the test, the dent hardly occurs. This caster resistance is much higher than that of a conventional wood material in which paper is sandwiched between the base plate 6 and the decorative veneer 5, and MDF.
Compared with the conventional wooden material sandwiched between the base plate 6 and the decorative veneer 5, there is almost no difference and is good. That is, the wood material 1 sufficiently secures crack resistance and caster resistance required as building materials for floors. In the present embodiment, the thickness of the hard resin plate 9 is 1.2 mm, but the thickness of the hard resin plate 9 is about 1 m.
If it is at least m, the caster resistance will be extremely high.

Further, the hard resin plate 9 of the wooden material 1 hardly absorbs water even when wet with water, so that it hardly swells by absorbing water unlike MDF, and its shape hardly changes. Therefore, even if water is applied to the surface 1A of the wooden material 1, not only the portion of the hard resin plate 9 hidden between the decorative veneer 5 and the base plate 6 but also the concave groove 2 is formed. Even the part that looks like 2C near the bottom does not absorb or swell,
The wood material 1 itself hardly deforms. That is, unlike the conventional wood material using MDF, the wood material 1 has excellent water resistance.

Since the hard resin plate 9 of the wooden material 1 is a recycled resin made of waste PET, it can be used for recycling. Moreover, since the hard resin plate 9 can be obtained relatively inexpensively, the wooden material 1 can be made inexpensive. Most of the resin hard plate 9 is hidden between the decorative veneer 5 and the base plate 6. Further, 2C near the bottom of the concave groove 2 in the hard resin plate 9
Is painted with a brown colored paint, the hard resin plate 9 cannot be seen from the surface 1A side (see FIG. 2). For this reason,
Even if it is a recycled resin, it does not impair the design of the wooden material 1 in appearance.

Next, a method for manufacturing the wood material 1 of the present embodiment will be described with reference to FIGS. First, the decorative veneer 5 shown in FIG. 3A, the hard resin plate 9 shown in FIG. 3B, and the base plate 6 shown in FIG. 3C are prepared. Each of the decorative veneer 5, the hard resin plate 9, and the base plate 6 has a substantially rectangular plate shape of 90 cm × 180 cm in plan view. Note that the base plate 6 is formed by laminating and bonding the wood grain of the Lauan single veneer 7 having a thickness of about 2 mm with an adhesive (not shown) alternately.

Next, the hard veneer 5 and the hard veneer 5 are placed on top of each other via a urea resin adhesive (not shown) so that the hard veneer 9 is positioned between the veneer veneer 5 and the base plate 6. 9, and
The hard resin plate 9 and the base plate 6 are respectively bonded. After bonding,
Since the wood material shown in FIG. 4 is produced, the above-mentioned concave grooves 2 are respectively formed from the surface (the surface of the decorative veneer 5) by a router. Thereafter, a brown aqueous colorant is imprinted on the surface of the wooden material by using a wiping coater (not shown), into a concave portion such as a conduit on the surface of the decorative veneer, and into the V-shaped concave groove to be colored. By this coloring process, the grain of the decorative veneer 5 and the lattice pattern by the concave groove 2 can be seen beautifully.

Next, an acrylic U
An undercoat clear paint, an intermediate clear paint, and a top coat clear paint composed of V paint are applied using a roll coater, respectively, and cured by UV to form a clear paint layer on the surface of the wooden material. In addition, these clear paints can also be applied using a flow coater, a spray or the like.
As in the present embodiment, when applying by a roll coater, the roll does not contact the inner wall surface of the V-shaped concave groove 2, so that the clear paint may not be sufficiently applied in the concave groove 2. In this case, if water is applied to the surface of the wooden material, there is no clear paint layer in the groove 2, so that the vicinity of the bottom of the groove 2
The hard resin plate 9 exposed to C is directly wet with water. But,
Since the hard resin plate 9 has low water absorption, it does not absorb or swell unlike a conventional wood material using MDF.

Therefore, the water resistance of the wooden material can be improved regardless of whether there is a paint layer in the concave groove 2 formed in the wooden material. In particular, when the paint layer is not sufficiently formed in the concave groove 2 formed in the wooden material, the present invention is preferably applied. In this manner, the hard resin plate 9 is sandwiched and bonded between the base plate 6 formed by laminating the lauan veneer and the decorative veneer 5 of the cedar veneer, and subjected to a coloring treatment and a clear coating. The wood material 1 shown in FIGS. 1 and 2 was manufactured.

As described above, the wood material 1 of the present embodiment has high crack resistance and caster resistance and also has excellent water resistance. Further, since the hard resin plate 9 is a recycled resin, it is relatively inexpensive and is useful for recycling. Further, since the groove 2 is formed on the surface 1A side of the wooden material 1, its design is high.

In the above, the present invention has been described with reference to the embodiments. However, the present invention is not limited to the above-described embodiments, and it is needless to say that the present invention can be appropriately modified and applied without departing from the gist of the present invention. Nor. For example, in the above-described embodiment, a cedar veneer is used as the decorative veneer 5;
A single plate such as oak may be appropriately changed and used. The thickness can also be appropriately changed depending on the material and the application, but is usually about 0.24 mm to 3.0 mm in many cases.

Further, in the above embodiment, the waste PET is used for the hard resin plate 9, but this can also be appropriately changed as described above. When the material is changed, the thickness is appropriately changed in consideration of the hardness of the resin and the like, so that sufficiently high caster resistance is obtained. In this case, it is more preferable that the thickness be 1 mm or more, since extremely high caster resistance can be obtained. Further, the base plate 6 may be appropriately changed to a plywood in which lauan wood and conifer veneer are alternately stacked, an OSB material, a veneer, and the like, depending on the use of the wood material 1 and the like.

In the above-described embodiment, the V-shaped groove 2 is formed in the wooden material 1. However, for example, a U-shaped groove may be used. Further, the depth of the concave groove 2 is set to a depth penetrating the decorative veneer 5 and reaching the hard resin plate 9.
The depth of the wooden material 1 can be appropriately changed in consideration of the design of the wooden material 1 by the concave groove 2 and the like. For example, the depth of the concave groove 2 can be made smaller than the thickness of the decorative veneer 5. Even such a wooden material 1 is excellent in crack resistance, caster resistance, water resistance and the like as described above. However, if the depth of the concave groove 2 is small, the design of the wooden material 1 may be inferior.
Therefore, it is preferable that the depth of the concave groove 2 is larger than the thickness of the decorative veneer 5 as in the above embodiment.

Further, in the above embodiment, the concave groove 2 is formed in the wooden material 1, but a wooden material without the concave groove 2 may be used. Such a wood material also has good crack resistance, caster resistance, water resistance, and the like, as described above. In the above embodiment, the coloring process and the clear coating are performed. However, the clear coating may be performed without the coloring process, or only the coloring process may be performed without the clear coating. Alternatively, neither the coloring process nor the clear coating may be performed. Even in these cases, the manufactured wood material has high crack resistance and caster resistance, and also has excellent water resistance.

[Brief description of the drawings]

FIG. 1 is an overall view showing a wood material of an embodiment.

FIG. 2 is a partially enlarged sectional view showing a wood material of the embodiment.

3A and 3B are diagrams showing a method of manufacturing a wooden material, wherein FIG. 3A is a partially enlarged sectional view showing a decorative veneer, FIG. 3B is a partially enlarged sectional view showing a hard resin plate, and FIG. FIG. 3 is a partially enlarged sectional view showing a base plate.

FIG. 4 is a view showing a method of manufacturing a wooden material, and is a partially enlarged cross-sectional view showing a state in which a decorative veneer, a hard resin plate, and a base plate are overlapped and adhered.

FIG. 5 is a diagram showing a conventional wood material sandwiching an MDF, wherein (a) is a partially enlarged cross-sectional view of the wood material in which the MDF is exposed near the bottom of the groove, and (b) is (a). FIG. 2 is a partially enlarged cross-sectional view showing a state when the surface of the wooden material shown in FIG.

[Explanation of symbols]

 Reference Signs List 1 wood material 1A surface (of wood material) 2 concave groove 2C near bottom of (groove) 5 decorative veneer 6 base plate 7 veneer (rawan) 9 hard resin plate

Claims (3)

[Claims] 1. A wood material comprising: a base plate, a decorative veneer, and a hard resin plate sandwiched between the base plate and the decorative veneer and bonded to each other. 2. The wood material according to claim 1, wherein said hard resin plate is made of recycled resin. 3. The wood material according to claim 1, further comprising a concave groove extending from the surface on the decorative veneer side to the hard resin plate.