JPH11182006A - Woody floor member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a warpage of a woody floor member and suppress cracks on the surface thereof by providing a woody base board, a reinforcing layer constituted so that an adhesive penetrates in the front and rear face direction and arranged on the surface of the base board, and a decoration veneer bonded on the base board through the reinforcing board. SOLUTION: A reinforcing layer 3 constituted of glass woven cloth, glass braided cloth, cheesecloth, etc., is interposed and stuck between a woody base board 4 and a decoration veneer 2 to constrain the decoration veneer 2 by the reinforcing layer 3. And hence, cracks on the surface of the decoration veneer 2 can be prevented and the hardness thereof is increased and further, recesses are not easily formed on the surface of the woody floor member and warps are not also easily generated. And further, as the reinforcing layer 3 is constituted so that an adhesive can penetrate in the front and rear direction, the base board 4 and the decoration veneer 2 can be stuck to each other by only applying an adhesive on one of the front and the rear faces of the reinforcing layer 3 and hence, the bonding work can be simplified. Accordingly, the production cost does not increase and it can prevent warps, and suppress cracks on the surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a wooden flooring having a decorative veneer on a surface layer.

[0002]

2. Description of the Related Art In general, in this type of wooden flooring, a plywood is used as a base plate, and a decorative veneer having a thickness of about 0.25 mm is arranged on the surface of the base plate to decorate the surface and to attach the back surface of the base plate. In addition, a non-woody material such as urethane foam or nonwoven fabric is arranged to ensure cushioning. Also, by interposing Japanese paper between the base plate and decorative veneer and bonding the base plate and decorative veneer to each other through this Japanese paper, a very thin decorative veneer is reinforced with Japanese paper by restraint, and It is also known that a plate is prevented from cracking over time.

[0003]

However, in the above-mentioned conventional wooden flooring material, when bonding the base plate and the decorative veneer, the Japanese paper is previously bonded to the base plate, and then the adhesive is further applied to the surface of the Japanese paper. The veneer veneer must be adhered by application, and this bonding operation takes time and labor, and there is a problem that the manufacturing cost increases accordingly.

Further, the decorative veneer is very thin, the hardness of the plywood constituting the decorative veneer and the base plate is low, and the binding force of Japanese paper is not so large. When used in a dining room or the like, the veneer is easily broken or dented.

[0005] As a wooden flooring material capable of solving this drawback, a thick veneer veneer is used. A veneer veneer is impregnated with resin to increase its hardness. Some have been known in the past. However, since the decorative veneer is expensive, the material cost of the wooden flooring material increases as the decorative veneer becomes thicker. Wood flooring requires an impregnation device for impregnating the resin, which increases equipment costs. Wood flooring using MDF as a base plate has a drawback that warpage is likely to occur. This is because the internal stress remaining during the production of the MDF is released by cutting during the production of the flooring material, thus breaking the balance. In addition, the warp of the wooden flooring material may occur not only in the case of the MDF but also in the case where the plywood is used as the base plate. It is considered that such warpage of the plywood is caused by the loss of the balance of the plywood configuration due to the bonding of Japanese paper and decorative veneer to the plywood, and the non-uniformity of the material constituting the plywood.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and a wooden floor capable of preventing warpage and suppressing surface cracks without substantially increasing the manufacturing cost. It is intended to provide materials.

[0007]

Means for Solving the Problems To achieve this object, the wooden flooring of the present invention has a wooden base plate and an adhesive which can be penetrated in the front and back directions, and is arranged on the surface of the base plate. It is characterized by comprising a reinforcing layer and a decorative veneer bonded to the base plate via the reinforcing layer.

In this wooden flooring material, the decorative veneer is interposed between the wooden base plate and the decorative veneer, and is bonded to the decorative veneer. In addition, since the hardness of the decorative veneer is reinforced by the reinforcing layer, the surface of the wooden flooring material is less likely to be dented.
In addition, the reinforcing layer also makes it difficult for warpage to occur. Further, since the reinforcing layer is configured so that the adhesive can penetrate in the front and back directions, for example, the adhesive applied to one of the front and back surfaces of the reinforcing layer penetrates to the other. Therefore, the base plate and the veneer can be bonded to each other simply by applying an adhesive to one of the front and back surfaces of the reinforcing layer, so that the bonding operation can be simplified as compared with the conventional case, and the manufacturing cost is reduced accordingly. can do.

In this case, it is preferable that the reinforcing layer is constituted by one of a glass woven fabric, a glass braided fabric and a cold gauze.

In this configuration, since the above-mentioned materials as the reinforcing layer are all permeable to the adhesive, the above-described simplification of the bonding operation can be realized. Also,
Since all of these materials are relatively inexpensive, the cost of material hardly increases.

In these cases, a second reinforcing layer disposed on the back surface of the base plate and a cushion material bonded to the base plate via the second reinforcing layer are formed so that the adhesive can penetrate in the front and back directions. It is preferable to further include the following.

[0012] With this configuration, cushioning properties can be obtained by the cushion material. In addition, since the bending of the base plate is directly restrained by the second reinforcing layer bonded to the base plate, the warping of the base plate is generated by the second reinforcing layer even when the base plate is made of MDF. Therefore, the entire wooden flooring can be prevented from warping. In addition, since the second reinforcing layer is configured so that the adhesive can penetrate in the front and back directions, the work of bonding the base plate and the cushioning material can be simplified, as in the case of bonding the base plate and the decorative veneer. It is.

In this case, it is preferable that the second reinforcing layer is formed of one of a glass woven fabric and a glass braid.

In this configuration, since a relatively rigid glass woven fabric or glass braid is used as the second reinforcing layer, the warp of the wooden flooring can be more reliably prevented.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a wooden flooring (hereinafter simply referred to as “flooring”) according to a first embodiment of the present invention in an exploded state. As shown in the figure, this flooring 1 is composed of a decorative veneer 2 and a first reinforcing layer 3 in order from the front side.
(Reinforcing layer), a base plate 4, a second reinforcing layer 5, and a cushion material 6.

The decorative veneer 2 is made of a solid board made of oak or hippo having a thickness of about 0.25 mm. The first reinforcing layer 3 is mainly for reinforcing the decorative veneer 2 and is made of a glass woven fabric or a glass braid having a thickness of about 0.1 to 0.2 mm. The base plate 4 is 6 to 9 mm thick
It is made of rawan plywood, MDF or the like, and a groove 7 is formed on the back surface thereof.

The second reinforcing layer 5 is mainly for preventing warpage of the base plate 4 and, like the first reinforcing layer 3, is made of glass woven fabric or glass braided cloth, and has a thickness. Is about 0.2 mm. The cushion material 6 has a thickness of 3
It is made of urethane foam of about 6 mm or so. The flooring material 1 is formed by sequentially laminating and adhering the materials 2 to 6 having the above-described configurations, and is finished to a thickness of about 12 to 15 mm as a whole.

According to the flooring material 1 having the above-described structure, the decorative veneer 2 is restrained by the first reinforcing layer 3 which is interposed between the base plate 4 and the veneer veneer 2 and adhered. The generation of cracks on the surface can be prevented, and the hardness of the decorative veneer 2 is reinforced by the first reinforcing layer, so that dents on the surface of the flooring 1 can be suppressed. Further, since the bending of the base plate 4 is directly restrained by the second reinforcing layer bonded to the base plate 4, even when the base plate 4 is formed of the MDF, the base plate 4 may be used.
Of the floor material 1 can be prevented.

Further, the first and second reinforcing layers 3,
In the glass woven fabric and the glass braid fabric constituting 5, the adhesive can penetrate in the front and back directions. Therefore, the base plate 4 and the decorative veneer 2 and the base plate 4 and the cushion material 6 are bonded to each other only by applying an adhesive to one of the front and back surfaces of the first and second reinforcing layers 3 and 5. can do. Therefore, adding the first and second reinforcing layers 3 and 5 to the components does not increase the burden of the bonding operation,
In particular, the bonding operation can be simplified and the manufacturing cost can be reduced accordingly, as compared with the conventional case where the washi is used as the reinforcing layer and the adhesive is not applied to the washi.

FIG. 2 shows a flooring according to a second embodiment of the present invention. This flooring 11 has a base plate 12 having a three-layer structure,
That is, the MDF 13, the third reinforcing layer 14, and the Lauan plywood 15 are arranged in this order from the top, and the other parts are the first
The flooring 1 has the same structure as the flooring 1 of the embodiment, and has a seven-layer structure as a whole. The third reinforcing layer 14 is made of MDF
The second reinforcing layer 5 is made of a glass woven fabric or a glass braid, similarly to the second reinforcing layer 5. The other configuration is the same as that of the above-described first embodiment. Therefore, the same components are denoted by the same reference numerals, and detailed description will be omitted.

Therefore, in the flooring material 11 of the present embodiment,
In addition to the effect obtained by the flooring 1 of the first embodiment, the second and third reinforcing layers 14 prevent the MDF 13 and the Lauan plywood 15 from warping, thereby preventing the flooring 11 from warping. it can.

Next, a description will be given of a test conducted to confirm the above-described effect of preventing warpage when a glass woven fabric or a glass braid is used as a reinforcing layer of a flooring material. In this test, a test body was prepared under the following conditions, and the initial warpage amount and the subsequent warpage change warpage amount were measured. A. 3. Structure of Test Specimen As shown in FIG. , 21 were prepared without glass fiber inserted, and as a glass fiber 22, a specimen S in which a glass non-woven fabric, a glass woven fabric, and a glass braid were inserted respectively was prepared (see Table 1). The and test specimens correspond to those according to the embodiment of the present invention, whereas the test specimen without glass fiber inserted and the test specimen with glass non-woven fabric having no adhesive permeability were used for comparison. Things. Each specimen S
Has a thickness of 7.5 × length of 367 × width of 56 mm. As the adhesive, aqueous vinyl urethane and resorcinol were used. B. The number of tests was one each. C. Initial warpage One week after completing the adhesion of the specimen S having the above configuration,
The amount of warpage (arrow height) of each test piece S was measured and used as the initial amount of warpage. In addition, "arrow height" means, as shown by the symbol A in FIG.
It is defined as the distance from a line connecting both ends in the length direction of the concave surface when the specimen S is warped to the vertex of the surface. D. After measuring the initial warpage amount, the test specimen S is put into a temperature and humidity condition according to the ASTM test, and a relative change amount based on the initial warpage amount of each test specimen S is defined as a change warpage amount. It was measured. The temperature and humidity conditions are, specifically, 23 ° C.
95% / 24 hours → 48 ° C / 28% / 24 hours → 23 ° C
・ 95% ・ 72 hours → 48 ° C. ・ 28% ・ 48 hours. In addition, as shown in FIG. 4, in such a condition change, the direction of the warp of the test specimen was different between the case of the change of the condition of dry → wet and the case of the change of the condition of wet → dry. As for the amount, the value of the warping direction in the case of dry → wet is defined as a negative value (−) (FIG. 4B), and the value of the warping direction in the opposite case is defined as a positive value (+) (FIG. 4A). , Respectively.

The initial warpage of each specimen S measured as described above is shown in Table 1 and FIG. From these charts, it can be seen that the initial warpage when the glass woven fabric or the glass braid is inserted between the Lauan veneers 21 and 21 is 0.4 to 1.1 mm as in the case where the glass nonwoven fabric is inserted. On the other hand, the initial warpage when not inserted is 1.8 to 4.5 mm.
It can be seen that the warpage can be greatly suppressed by inserting a glass woven cloth or the like.

[0024]

[Table 1]

Table 2 and FIGS. 6 and 7 show the amount of change in warpage of each specimen S. From these charts, the specimen S into which the glass woven fabric or the glass braid is inserted has a very small amount of change warpage as compared with the specimen without the insertion.
It can be seen that the time-dependent change in the amount of warpage can be greatly suppressed by inserting a glass woven cloth or the like, and a state in which warpage is small can be stably maintained.

[0026]

[Table 2]

The present invention is not limited to the embodiments described above, but can be implemented in various modes.
For example, in the embodiment, the first reinforcing layer interposed between the decorative veneer and the base plate is made of a glass woven fabric or a glass braided cloth. However, as the first reinforcing layer, the decorative veneer can be reinforced and the adhesive can penetrate. Other suitable materials can be employed as long as they have properties. For example, the first reinforcing layer may be made of a cold gauze. In this case, the material is not limited to glass, but may be artificial fibers such as rayon or natural fibers such as cotton. Further, a floor material in which the cushion material provided on the back side is omitted is also within the scope of the present invention. In addition, the detailed configuration can be appropriately changed without departing from the spirit of the present invention.

[0028]

As described in detail above, the wood flooring material of the present invention has the effects of preventing warpage and suppressing surface cracking without substantially increasing the production cost. Have.

[Brief description of the drawings]

FIG. 1 is an exploded view showing a configuration of a wooden flooring according to a first embodiment of the present invention.

FIG. 2 is an exploded view showing a configuration of a wooden flooring according to a second embodiment of the present invention.

FIG. 3 is an exploded view illustrating a configuration of a test body used in a test for preventing warpage.

FIG. 4 is an exploded view showing a state of warpage of a test body.

FIG. 5 is a graph showing an initial warpage amount of a test body.

FIG. 6 is a graph showing the amount of change in warpage of a test sample when aqueous vinyl urethane is used as an adhesive.

FIG. 7 is a graph showing the amount of change in warpage of a test sample when resorcinol is used as an adhesive.

[Description of Signs] 1 Wooden floor material 2 Decorative veneer 3 First reinforcing layer 4 Base plate 5 Second reinforcing layer 6 Cushion material 11 Wooden floor material 12 Base plate 14 Third reinforcing layer

Claims (4)

[Claims] 1. A wooden base plate, a reinforcing layer configured to allow an adhesive to penetrate in a front-to-back direction, a reinforcing layer disposed on a surface of the base plate, and bonded to the base plate via the reinforcing layer. A wooden flooring comprising: a decorative veneer. 2. The wooden flooring according to claim 1, wherein the reinforcing layer is made of one of a glass woven fabric, a glass braided fabric, and a cold gauze. 3. A second reinforcing layer arranged on the back surface of the base plate so that an adhesive can penetrate in a front-to-back direction, and a cushion material bonded to the base plate via the second reinforcing layer. The wood flooring according to claim 1 or 2, further comprising: 4. The wooden flooring according to claim 3, wherein the second reinforcing layer is formed of one of a glass woven fabric and a glass braided fabric.