JP5452946B2 - Decorative plate and method of manufacturing the decorative plate - Google Patents

Description

  The present invention relates to a decorative board used as a flooring and a manufacturing method thereof.

  Make-up as flooring with thin wood veneer attached to the surface of a wood substrate such as plywood, so that the floor surface is not dented when moving furniture with casters or when placing furniture. The board is known. As a method for producing such a flooring, conventionally, as shown in Patent Document 1, for example, MDF (medium density fiberboard) impregnated with resin is stuck on the surface of a wooden substrate, and the surface of this MDF is adhered to the surface. A method for obtaining a flooring material by sticking a thin wood veneer has been proposed.

  However, in the flooring manufactured by the method of Patent Document 1 described above, when a hard plastic or iron caster is slid (rolled) continuously for a long period of time, it is hard due to the load repeatedly received from the hard caster. A problem arises in that a thin wood veneer is crushed to cause shear failure, and the wood veneer is peeled off.

Therefore, as a flooring considering the scratch resistance against long-term use of casters, etc., as shown in Patent Document 2, a flexible rubber adhesive is used to disperse stress and Some attempt to suppress delamination.
Japanese Patent Laid-Open No. 04-214301 JP 2003-21420 A

  However, when the adhesive layer is formed with a rubber-based adhesive as in Patent Document 2 and the flooring is used for floor heating, the moisture in the adhesive layer is increased by the temperature of the flooring rising. There is a problem in that it is reduced by vaporization, the rubber hardness of the adhesive layer is increased, the stress dispersion effect is lowered, and the wood thin veneer is peeled off.

  The present invention has been made in view of such points, and an object thereof is to obtain a decorative board having excellent scratch resistance against long-term use of casters even when used as a flooring material for floor heating. .

  In order to achieve the above object, in the present invention, a polymer compound that is kept in a liquid state at the boiling point of water is added to an adhesive that bonds a thin wood veneer to a wooden base material, and the floor material is heated. Even when the water content decreased, the polymer compound kept the rubber hardness of the adhesive layer low.

Specifically, the decorative board according to the first invention is a decorative board in which a wooden thin veneer is laminated and integrated via an adhesive layer on at least the surface of a wooden base material having a hard surface, the adhesive board the thickness of the layer is less or more and 75 [mu] m 30 [mu] m, the adhesive layer, the temperature rise of the veneer I liquid der at the boiling point of water instead of vaporized moisture when moisture in the adhesive layer is vaporized adhesive rubber hardness after in the adhesive layer remaining Ru polymer compound in a liquid state is mixed and solidified is 45 ° or less a type a durometer is characterized by being composed by solidifying.

  In the first invention, the adhesive layer having a thickness of 30 to 75 μm, which is solidified by an adhesive having a rubber hardness after solidification of 45 ° or less with a type A durometer, is formed between the wood base material and the wood thin veneer. Because it is installed, when the decorative board is applied to the flooring material, even if casters (casters in furniture with casters) are used for a long time, the stress is dispersed and peeling of the thin wood veneer is suppressed. Is done.

  Further, since the adhesive used as the adhesive layer is a mixture of a polymer compound that is liquid at the boiling point of water, a decorative board is used as a flooring for floor heating, and the temperature of the flooring increases. Even if the moisture in the adhesive layer is reduced by vaporization, the polymer compound remains in the adhesive layer as a liquid at the boiling point of water, and this polymer compound is substituted for moisture. An increase in the rubber hardness of the adhesive layer is suppressed, and the hardness is maintained at 45 ° or less with a type A durometer. Therefore, when constructed as a flooring material for floor heating, it is possible to prevent the thin wood veneer from peeling off even if casters are used.

  The decorative board according to the second invention is characterized in that, in the first invention, a paper layer is provided between the adhesive layer and the wood thin veneer.

  In the second invention, since the paper layer is provided between the adhesive layer and the wood thin veneer, the adhesive of the adhesive layer soaks into the wood thin veneer, and excess adhesive is removed from the surface. Exudation can be suppressed by the paper layer. Therefore, it is possible to secure an adhesive layer having a thickness of 30 to 75 μm that is useful for peeling off the thin wood veneer by using a long-term caster.

  And it can prevent that an adhesive oozes into the said wooden thin veneer and the design property of a decorative board deteriorates.

The third method of manufacturing a decorative laminate according to the present invention comprises a substrate-side adhesive application step at least a surface is coated with a base material-side adhesive on the surface of the hard wood substrates, paper on the base-side adhesive The paper layer laminating step for laminating the layers, and the above-mentioned wood base material, base material side adhesive and paper layer are laminated by hot pressing, and the base material side adhesive is solidified to have a thickness of 30 μm or more and 75 μm A first hot-pressing step for forming an adhesive layer, a single plate side adhesive applying step for applying a single plate side adhesive on the paper layer, and a wood thin veneer on the single plate side adhesive a lamination step of obtaining a laminated body by laminating, the laminate seen including a second hot pressing step of obtaining a hot pressing to integrally laminated to decorative plate, in the base material side adhesive applying step, When the moisture in the adhesive layer is vaporized due to a rise in temperature of the decorative board, it is a liquid at the boiling point of water, instead of the vaporized moisture A base material side adhesive is applied in which a polymer compound remaining in a liquid state is mixed in the adhesive layer and the rubber hardness after solidification is 45 ° or less with a type A durometer .

  In the third aspect of the invention, after the base material side adhesive is applied to a wooden base material having at least a hard surface, a paper layer is laminated on the adhesive, and these are laminated by pressing with heat and pressure. Thus, an adhesive layer in which the base material side adhesive is solidified is formed between the wooden base material and the paper layer. Further, the veneer-side adhesive is applied on the paper layer to laminate the thin wood veneers, and these are laminated and integrated again by hot pressing to obtain a decorative board.

At this time, the adhesive layer is not less and 75μm or less 30μm or more thick, the substrate-side adhesive when the moisture in the adhesive layer due to the temperature rise of the veneer I liquid der at the boiling point of water is vaporized those rubber hardness after residual Ru polymer compound in the liquid state in the adhesive layer in place of the vaporized moisture is mixed and solidified is 45 ° or less a type a durometer is used. For this reason, the decorative board thus obtained becomes a decorative board having a thickness of 30 to 75 μm and an adhesive layer having a hardened rubber hardness of 45 ° or less with a type A durometer. When used as a flooring for heating, as in the case of the first invention, peeling of the thin wood veneer is suppressed even when the caster is used for a long time.

  In addition, since a paper layer is provided between the adhesive layer and the wood thin veneer, it prevents the base-side adhesive from seeping into the wood thin veneer and has a sufficiently thick adhesive layer for design. An excellent decorative board can be easily obtained.

Method for manufacturing a decorative laminate according to the fourth invention, a substrate-side adhesive application step at least a surface is coated with a base material-side adhesive on the surface of the hard wood substrates, paper on the base-side adhesive Paper layer laminating step for laminating layers, veneer side adhesive applying step for applying a veneer side adhesive on the paper layer, and laminating thin wood veneer on the veneer side adhesive And laminating and integrating the laminate by hot-pressing to form a bonding layer having a thickness of 30 μm or more and 75 μm or less, and a cosmetic layer. look including a hot pressing to obtain a plate, in the base-side adhesive coating step, the moisture in the adhesive layer due to the temperature rise of the veneer a liquid at the boiling point of water is vaporized when vaporized moisture Instead of the polymer compound that remains in the liquid state in the adhesive layer and the rubber hardness after solidification It is characterized by applying a base material side adhesive which is 45 ° or less with a type A durometer .

In the fourth invention, a base material side adhesive, a paper layer, a veneer side adhesive, and a wood thin veneer are sequentially laminated on a wood base material to form a laminate, and this laminate is hot-pressed. And an adhesive layer is formed to obtain a decorative board.

At this time, the base material side adhesive in the liquid state in the adhesive layer in place of the vaporized moisture when moisture in the adhesive layer due to the temperature rise of the veneer I liquid der at the boiling point of water is vaporized rubber hardness after residual Ru is mixed polymer compound and solidification is used which becomes 45 ° or less with type a durometer, that the substrate-side adhesive is solidified, thickness and less 75μm at 30μm or more An adhesive layer is formed. For this reason, the decorative board obtained in this way becomes a decorative board having a thickness of 30 to 75 μm and an adhesive layer having a hardened rubber hardness of 45 ° or less with a type A durometer, and the decorative board is heated under the floor. When used as a flooring material, as described above, peeling of the thin wood veneer is suppressed even when the caster is used for a long time.

  And since a paper layer is provided between the adhesive layer and the wood thin veneer, the substrate side adhesive is prevented from seeping into the wood thin veneer and has a sufficiently thick adhesive layer. A decorative board having excellent properties can be easily obtained.

  As described above, according to the present invention, even when used as a flooring material for floor heating, it is possible to effectively suppress the peeling of the thin wood veneer stably for a long period of time, A decorative board excellent in scratch resistance against use can be obtained.

  Hereinafter, the best embodiment of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or its application.

[Decorative board]
FIG. 1 shows a decorative board A according to an embodiment of the present invention. The decorative board A is used as a flooring, and is particularly preferably used as a flooring for floor heating. The decorative board A includes a wooden substrate 1 having at least a hard surface, an adhesive layer 2 disposed on the surface of the wooden substrate 1, a paper layer 3 disposed on the adhesive layer 2, and the paper layer. A woody thin veneer 5 as a decorative thin plate arranged on 3 through a veneer side adhesive layer 4 is laminated and integrated in order.

(Wood base)
The wood substrate 1 is made of a wood fiber board such as an insulation board, MDF, or hard board, or a wood material such as plywood, particle board, or wood, and at least the surface thereof is a long-term and continuous caster (caster). It is assumed to be hard enough to withstand the use of casters in furniture with furniture.

  As a strengthening method for reinforcing the surface of the wood substrate 1, the surface layer of the substrate 1 may be impregnated with a melamine resin, a phenol resin, an epoxy resin, a urethane resin, an isocyanate resin or the like, or a melamine resin A reinforcing layer made of various resin-impregnated paper such as impregnated paper or phenol resin-impregnated paper may be provided on the surface layer. Also, instead of resin-impregnated paper, hard artificial resin wood mainly made of wood powder, wood fiber, wood slices, etc., and kneaded and molded with various resins, or hard wood fiber boards such as MDF, hardboard, etc. The surface may be reinforced by the wooden substrate 1.

(Adhesive layer)
The adhesive layer 2 has a thickness of 30 to 75 μm (30 μm or more and 75 μm or less). In addition, the adhesive layer 2 is solidified with a base-side adhesive in which a polymer compound that is liquid at the boiling point of water (maintained in a liquid state) is mixed and the hardness after solidification is 45 ° or less with a type A durometer. It consists of things.

  Examples of the base material side adhesive include acrylic resins, vinyl acetate resins, latex resins, rubber resins, vinyl urethane resins, urethane resins and modified resins thereof, these resins and urea melamine resins, A mixture with an epoxy resin, a phenol resin, an isocyanate resin, or the like is preferably used.

  Furthermore, in order to increase the coating amount of the base-side adhesive, it is preferable to add various thickeners and bulking agents to increase the viscosity. As the thickener, for example, flour or poval is used. As the extender, calcium carbonate, alumina, titanium oxide or the like is used.

  Moreover, in order to improve the concealing property of the woody base material 1, various pigments may be added and colored to the base material side adhesive.

  Examples of the polymer compound mixed in the base material side adhesive include polyoxyethylene polyoxypropylene alkyl ether, coconut oil fatty acid sorbitan, etc., and the decorative plate A is used as a flooring material for floor heating. Even when the moisture in the adhesive layer 2 decreases due to vaporization when heated, it remains in a liquid state in the adhesive layer 2 and can suppress an increase in rubber hardness of the adhesive layer 2 instead of the vaporized moisture. A liquid having a boiling point of water (in other words, a temperature at which moisture in the adhesive layer 2 is reduced by vaporization) is used.

(Paper layer)
The paper layer 3 is made of general titanium paper, kraft paper, inter-paper reinforced paper having a thickness of about 30 to 60 μm and a basis weight of about 25 to 40 g / m ² . Thickness and basis weight that do not prevent impregnation of the base material side adhesive and the single plate side adhesive described later and do not easily exude to the surface of the paper layer 3 by pressing. Any paper can be used as long as it has paper.

  The paper layer 3 prevents the base-side adhesive from seeping into the woody thin veneer 5. Further, the paper layer 3 is impregnated with the base material side adhesive to be the adhesive layer 2 from the back surface side and the below-mentioned single plate side adhesive from the front surface side, so that the entire paper layer 3 is adhesive. It is strengthened by impregnation.

(Single plate side adhesive layer)
On the paper layer 3, a hard veneer side adhesive is applied to firmly bond the paper layer 3 and the wood thin veneer 5, and the paper layer 3 and the wood thin veneer 5 are veneered. The side adhesive layer 4 is preferably joined and integrated.

  The above single veneer-side adhesive is capable of realizing a desired strength when the laminated body in which the wood base material 1, the paper layer 3, and the wood thin veneer 5 are laminated by hot pressing. preferable.

  Specifically, as the single plate side adhesive, for example, acrylic resin, vinyl acetate resin, latex resin, rubber resin, vinyl urethane resin, urethane resin and their modified resins, urea melamine resin, Epoxy resins, phenol resins, isocyanate resins, etc., and mixtures of these resins are used. In order to effectively suppress the cracking of the thin wood veneer 5 due to dry and wet when using the decorative board A, as the veneer side adhesive, a solidified material such as urea melamine resin or isocyanate resin is hard. It is preferable to use an agent as the main agent.

(Woody thin veneer)
As the wooden thin veneer 5, a natural wooden material or a thin slice obtained by slicing these laminates can be used. As the natural wood material, any material such as conifers, broad-leaved trees, so-called fast-growing trees can be used. Moreover, what sliced the laminated body of natural wooden material is what is called an artificial veneer.

  In addition, the wood thin veneer 5 can be a dry veneer or a raw veneer (so-called wet veneer). The thickness of the thin wood veneer 5 is not only hard when it is too thick, but also the resistance to dry cracking of the veneer 5 itself is deteriorated, so 0.15 to 1.0 mm (at 0.15 mm or more) And about 1.0 mm or less).

[Method of manufacturing decorative board]
Next, the manufacturing method of the said decorative board A is demonstrated. First, the said base material side adhesive agent is apply | coated on the surface of the said wooden base material 1 with a hard at least surface (base material side adhesive agent application process). A flow coater or a roll coater is preferably used as the means for applying the base material side adhesive. With this base material side adhesive agent, it applies so that the contact bonding layer 2 formed through a post process may become a thickness of 30-75 micrometers.

  Next, the paper layer 3 is laminated on the applied base material side adhesive (paper layer lamination step).

  Thereafter, the wood base material 1, the base material side adhesive, and the paper layer 3 may be preliminarily hot-pressed and laminated and integrated (first hot-pressing step of claim 3). There are various hot pressing methods such as a general roll press and a flat plate press, and a flat plate press is preferably used. The hot press is performed at a temperature of 100 to 130 ° C. and 0.2 to 1.0 MPa for about 30 to 90 seconds. Thereby, the base material side adhesive is completely solidified, and the adhesive layer 2 having a thickness of 30 μm or more and 75 μm or less and a hardness of 30 ° or less with a type A durometer is formed. After the first hot press process, it is desirable to cool and cure.

  Next, the single plate side adhesive is applied onto the paper layer 3 (single plate side adhesive applying step). The application means for applying the single plate side adhesive is not particularly limited. What is necessary is just to select the application | coating method according to the application quantity of the target single_plate | side adhesive agent, for example, a roll coater, a flow coater, a spray etc. are suitable.

  Furthermore, the wood thin veneer 5 is placed and laminated on the veneer side adhesive to obtain a laminated body (lamination step). The placed wood thin veneer 5 may be temporarily fixed. As a method for temporary fixing, a method in which moisture in the temporarily fixed portion is blown off by high frequency or the like and the single plate side adhesive is solidified is preferably used.

  And the said laminated body is hot-pressed and laminated | stacked and integrated, and the decorative board A is obtained (hot-pressing process). Even when the wood base material 1, the base material side adhesive, and the paper layer 3 are hot-pressed and integrated by the first hot-pressing process, the wood thin veneer 5 is laminated through the single plate side adhesive. After that, hot-pressing is performed again (second hot-pressing step of claim 3). The method of hot pressing is the same as the method described above. Thereby, the base material side adhesive and the veneer side adhesive are completely solidified.

  The decorative board A thus obtained may be subjected to a decorative process such as a float process as required (decorative process). As a method for performing this floating processing, for example, a shot blasting method, which is a processing method for causing a hard and fine blasting abrasive material to collide with the surface of the thin wood veneer 5 to make fine scratches on the surface, can be used. . Thereby, the soft part of the wooden thin veneer 5 is ground and a hard part remains, and the decorative board A which has an unevenness | corrugation on the surface can be obtained.

  Alternatively, a transparent resin coating may be formed by applying a transparent resin paint to the surface of the decorative board A thus subjected to the float process, and curing it.

[Effect of the embodiment]
Therefore, in this embodiment, the adhesive layer 2 is interposed between the wood substrate 1 of the decorative board A and the wood thin veneer 5, and the adhesive layer 2 has a thickness of 30 to 75 μm and is solidified. Since the hardness of the rubber is 45 ° or less with a type A durometer, even if the decorative board A is used as a flooring and casters in caster furniture etc. are used for a long time, the stress is dispersed and the wood thin veneer 5 can be suppressed.

  Moreover, since the high molecular compound which is a liquid with the boiling point of water is mixed in the base material side adhesive which becomes the adhesive layer 2 by solidification, the decorative board A is used as a flooring material for floor heating, and the floor Even if the moisture in the adhesive layer 2 is evaporated and reduced due to the temperature rise of the material, the polymer compound remains in the adhesive layer 2 in a liquid state, and this polymer compound is substituted for moisture. An increase in rubber hardness in the adhesive layer 2 is suppressed, and the rubber hardness in the adhesive layer 2 is maintained at 45 ° or less with the type A durometer. Thus, when the decorative board A is used as a flooring material for floor heating, it is possible to stably prevent the wooden thin veneer 5 (decorative thin board) from being peeled off even if a caster is used.

  Further, since the paper layer 3 is provided between the adhesive layer 2 of the decorative board A and the wood thin veneer 5, the adhesive of the adhesive soaks into the wood thin veneer 5 so that an excess from the surface. The paper layer 3 can prevent the adhesive from seeping out. Therefore, it is possible to secure the adhesive layer 2 having a thickness of 30 to 75 μm that is useful for peeling off the thin wood veneer 5 by long-term use of casters. Moreover, it can also prevent that the designability of the decorative board A deteriorates because the adhesive of the adhesive layer 2 permeates into the thin wood board 5.

(Other embodiments)
In addition, as a method of forming the adhesive layer 2 having a thickness of 30 to 75 μm on the decorative board A, the paper layer 3 is provided between the adhesive layer 2 and the thin wood veneer 5 as in the manufacturing method of the above embodiment. In addition to the method, the following method may be adopted. That is, after the base material side adhesive is applied onto the wood base material 1 and the base material side adhesive is in a semi-solidified state, that is, in a state where solidification has progressed to the extent that no liquid adhesive is present, This is a method in which a veneer-side adhesive is applied on a material-side adhesive, a thin wood veneer 5 is placed on the veneer-side adhesive, and hot pressing is performed. However, when productivity is considered, the manufacturing method which provides the paper layer 3 between the contact bonding layer 2 and the wood thin veneer 5 is preferable.

  Next, specific examples will be described.

Example 1
A resin liquid was applied to the surface of a lauan plywood having a thickness of 11.5 mm. This resin solution is obtained by adding 3 parts by weight of paratoluenesulfonic acid having a concentration of 50% by weight as a curing agent to 100 parts by weight of aqueous modified melamine having a resin content of 70% by weight. This resin solution was applied so as to be about 330 g / m ^{2 in} terms of solid content. Next, a resin-impregnated base paper having a density of 0.5 and a weight of 115 g / m ² is placed on the surface of the plywood on the resin liquid application side, and is heated by a hot press at 130 ° C. under a low pressure condition of 0.2 MPa. Heated for 2 seconds. Furthermore, by heating and pressing at 130 ° C. for 80 seconds under the condition of 1.0 MPa, the base paper for resin impregnation is adhered to the surface of the plywood, and the base paper is impregnated with a synthetic resin solution and cured, so that from the resin-impregnated cured paper A wood base material having a reinforcing layer formed on the surface was obtained.

A mixture of 10 parts by weight of polyoxyethylene polyoxypropylene alkyl ether with 100 parts by weight of ethylene / vinyl acetate copolymer resin was applied to the surface of the wood base as a base-side adhesive. On top of that, a paper-to-paper reinforced paper having a thickness of 30 μm and a basis weight of 25 g / m ² was placed as a paper layer. Further, a urea melamine resin adhesive was applied as a veneer-side adhesive on the paper layer with a roll coater, and a 0.25 mm thick hibern wet veneer was placed. This was hot-pressed at 120 ° C. under a hot-pressure condition of 0.8 MPa for 50 seconds. And after performing the floating process by the shot blasting method, the transparent resin coating was applied and the transparent resin coating film was formed, and the decorative board was obtained.

  When the cross section of the decorative board thus obtained was observed, an adhesive layer having a thickness of 30 to 40 μm was formed between the reinforcing layer on the surface of the wooden substrate and the paper layer. When the rubber hardness of the adhesive layer was measured, it was 30 ° with a type A durometer.

  Next, a caster resistance test was performed on the decorative board. The caster resistance test is a test in which a load of 25 kg is placed on an iron single wheel caster having a diameter of 50 mm and the length of 300 mm is reciprocated 500 times. The moving speed of the caster is about 2 seconds / reciprocation, and the dent amount on the decorative board surface after the test is measured and the state is visually confirmed.

  The test results of the caster resistance test showed that the dent amount on the decorative plate surface was 0.12 mm at the maximum, and peeling of the thin wood veneer was not confirmed.

  Furthermore, assuming the case where it is used as a flooring material for floor heating, the decorative board was cured with a dryer at 80 ° C. for 96 hours, and then the rubber hardness measurement and caster resistance test were performed in the same manner as described above.

  The rubber hardness of the adhesive layer after curing for 96 hours with this dryer at 80 ° C. is 40 ° with a type A durometer. The test result of the caster resistance test is that the dent amount on the surface of the decorative board is 0.12 mm at the maximum, No peeling of the thin single plate was confirmed.

(Example 2)
A 2.7 mm thick MDF was stuck to the surface of a 9 mm thick softwood plywood with a vinyl urethane adhesive by a cold press to obtain a wooden substrate.

A mixture of 10 parts by weight of coconut oil fatty acid sorbitan with 100 parts by weight of ethylene / vinyl acetate copolymer resin was applied to the surface of the wood base as a base-side adhesive. On top of that, an inter-paper reinforcing paper as a paper layer having a thickness of 30 μm and a basis weight of 25 g / m ² was placed. Furthermore, a urea melamine resin adhesive was applied as a veneer side adhesive on the paper layer with a roll coater, and a 0.25 mm-thick wet walnut veneer was placed. This was hot-pressed at 120 ° C. under a hot-pressure condition of 0.8 MPa for 50 seconds. And after performing the floating process by the shot blasting method, the transparent resin coating was applied and the transparent resin coating film was formed, and the decorative board was obtained.

  When the cross section of the decorative board thus obtained was observed, an adhesive layer having a thickness of 30 to 40 μm was formed between the reinforcing layer on the surface of the wooden substrate and the paper layer. When the rubber hardness of the adhesive layer was measured, it was 35 ° with a type A durometer.

  Moreover, the caster resistance test similar to the above was done with respect to the obtained decorative board. As a result of the test, the maximum amount of dents on the decorative board surface was 0.12 mm, and peeling of the thin wood veneer was not confirmed.

  Furthermore, the rubber hardness of the adhesive layer after curing this decorative board with a dryer at 80 ° C. for 96 hours is 45 ° with a type A durometer, and the test result of the caster resistance test shows that the maximum dent amount on the decorative board surface is 0. At 12 mm, no peeling of the thin wood veneer was confirmed.

(Comparative example)
The decorative board of the comparative example is replaced with only ethylene / vinyl acetate copolymer resin from ethylene / vinyl acetate copolymer resin mixed with polyoxyethylene polyoxypropylene alkyl ether as base material side adhesive in Example 1 above. The others are the same as those in the first embodiment.

  When the cross-section observation of the obtained decorative board of the comparative example was performed, an adhesive layer having a thickness of 30 to 40 μm was formed between the reinforcing layer on the surface of the wooden substrate and the paper layer. When the rubber hardness of the adhesive layer was measured, it was 30 ° with a type A durometer.

  Moreover, as for the test result of the caster-proof test with respect to the obtained decorative board, the dent amount of the decorative board surface was 0.12 mm at the maximum, and peeling of the thin wood veneer was not confirmed.

  However, the rubber hardness of the adhesive layer after curing this decorative board with an 80 ° C. dryer for 96 hours was 70 ° with a type A durometer. Moreover, the test result of the caster resistance test showed that the maximum dent amount on the decorative board surface was 0.12 mm, but the thin wood veneer peeled off and material destruction occurred.

  INDUSTRIAL APPLICABILITY The present invention is particularly useful for a decorative board used as a flooring material for floor heating and a method for producing the same, and has high industrial applicability.

FIG. 1 is an enlarged cross-sectional view schematically showing a decorative board according to an embodiment of the present invention.

A decorative board 1 wood base material 2 adhesive layer 3 paper layer 5 wood thin veneer

Claims (4)

It is a decorative board in which a wooden thin veneer is laminated and integrated via an adhesive layer on the surface of a wooden base material having at least a hard surface,
The adhesive layer has a thickness of 30 μm or more and 75 μm or less,
The adhesive layer is residual Ru polymer compound in the liquid state in the adhesive layer in place of the moisture vaporized when moisture in the adhesive layer due to the temperature rise of the veneer I liquid der at the boiling point of water is vaporized A decorative board comprising a solidified adhesive that is mixed and has a solidified rubber hardness of 45 ° or less with a type A durometer. In claim 1,
A decorative board, wherein a paper layer is provided between the adhesive layer and the thin wood veneer. A substrate-side adhesive application step at least a surface is coated with a base material-side adhesive on the surface of the hard wood substrate,
A paper layer laminating step of laminating a paper layer on the base material side adhesive;
The wood base material, the base material side adhesive, and the paper layer are laminated together by hot pressing, and the base material side adhesive is solidified to form an adhesive layer having a thickness of 30 μm or more and 75 μm or less. 1 hot press process,
A veneer side adhesive application step of applying a veneer side adhesive on the paper layer;
A laminating step of laminating a thin wood veneer on the veneer side adhesive to obtain a laminate;
Look containing a second hot pressing to obtain a laminated integrated with the decorative plate by hot pressing the laminated body,
In the base material side adhesive coating step, when the moisture in the adhesive layer is vaporized due to a rise in the temperature of the decorative board due to the boiling point of water, it remains in a liquid state in the adhesive layer instead of the vaporized moisture. A method for producing a decorative board, comprising applying a base material side adhesive in which a molecular compound is mixed and a rubber hardness after solidification is 45 ° or less with a type A durometer . A substrate-side adhesive application step at least a surface is coated with a base material-side adhesive on the surface of the hard wood substrate,
A paper layer laminating step of laminating a paper layer on the base material side adhesive;
A veneer side adhesive application step of applying a veneer side adhesive on the paper layer;
A laminating step of laminating a thin wood veneer on the veneer side adhesive to obtain a laminate;
The laminated body is hot-pressed to be laminated and integrated to solidify the base material-side adhesive to form an adhesive layer having a thickness of 30 μm or more and 75 μm or less, and a decorative plate is obtained. and a step seen including,
In the base material side adhesive coating step, when the moisture in the adhesive layer is vaporized due to a rise in the temperature of the decorative board due to the boiling point of water, it remains in a liquid state in the adhesive layer instead of the vaporized moisture. A method for producing a decorative board, comprising applying a base material side adhesive in which a molecular compound is mixed and a rubber hardness after solidification is 45 ° or less with a type A durometer .

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