JPH09225910A - Decorative board and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a wooden fiber board from chipping on account of an impact in the manufacturing process of a decorative board based on a wooden fiber board, and sticking a decorative surface board to a base material in a satisfactory condition. SOLUTION: After applying a polymer compound other than formalin resin to the surface of a wooden fiber board (MDF, HB, etc.) so that the wooden fiber board is impregnated with the polymer compound, a decorative surface board is stuck to the wooden fiber board either in such a state that the polymer compound is still uncured, or through an adhesive layer after the polymer compound is cured. The preferable polymer compound other than formalin resin is moist-curing urethane and the preferable adhesive is a water adhesive.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative board and a method for producing the same.
The present invention relates to a decorative board in which a wood base material made of a wood fiber board such as F (medium fiber board) is used and a surface decorative material is attached to the surface thereof, and a manufacturing method thereof.

[0002]

2. Description of the Related Art A decorative board in which a surface decorative material is attached to the surface of a wooden base material is known. As the wood base material, a composite board in which a plurality of different or similar wood materials are bonded and laminated is often used, and as the material, plywood, wood fiber board (fiber board) such as MDF, OSB and particles. A board or the like is used. Further, as the surface decorative material, a decorative material such as a veneer, a single plate, or a printing sheet or a decorative sheet is used, and further, coating may be applied on the decorative material.

Among the wood fiber boards, MDF is widely used alone or as a laminate with other wood materials as a base material of a decorative board because it has an appropriate weight and bending strength. In addition, an adhesive such as urea melamine resin, ethylene vinyl acetate resin, SBR, or water-based vinyl urethane is used for bonding the surface decorative material to the wood fiber board forming the surface layer of the wood base material.

On the other hand, for the purpose of further improving the bending resistance of the wood fiberboard, a thermosetting resin (for example, phenol resin) is applied on both sides of the wood fiberboard using a spreader, and then phenol is applied. By inserting the resin-coated wood fiberboard between the upper and lower presses of the hot press and heating it, the wood fiberboard with the resin impregnated layer in which the phenol resin has been impregnated and cured on the front and back surfaces of the wood fiberboard is formed. It is known (see Japanese Patent Laid-Open No. 7-80810). According to this, it is said that it is possible to obtain a wood fiber board which is lightweight but has a bending strength increased by about 60% before heating.

[0005]

The wood fiberboard is manufactured by integrating plant fibers such as wood mainly with formalin resins such as urea resin, melamine resin and phenol resin, which are three-dimensionally cured. The thermosetting formalin-based resin, which is a thermosetting resin, has hard and brittle physical properties among synthetic resins. Therefore, the conventional wood fiber board has a drawback that the adhesive layer is destroyed when an external force such as an impact force is applied to the fiber adhesive layer, the wood fiber board is chipped, or delamination easily occurs.

Therefore, in a production line for manufacturing a decorative board by using a wood fiber board composite board as a base material and adhering a thin veneer board or the like onto the base material, particularly the wood fiber board or the composite board thereof is used in a flow direction changing line or the like. There is a drawback that the wood fiberboard is partially chipped when the wood comes into contact with a guide rod or the like, or when another unexpected impact force is applied to the surface of the wood fiberboard. When the chipping occurs partially, the base material is discarded as a defective product, which is one of the causes of cost increase. Further, when a caster test or the like is performed on a decorative board having a wood fiber board or a composite board thereof as a base material, or when a V groove or the like is formed on the surface of the decorative board for the purpose of design, the V groove portion or the like is pressure-welded. There was also a defect that the part was delaminated.

Even in the case where the front and back surfaces are impregnated and cured with a thermosetting resin in order to improve the bending strength of the above-mentioned wood fiber board, consideration is given to impact resistance, that is, chipping due to impact force occurs. No consideration has been given, and even when a decorative board is manufactured using a wood base material having a wood fiberboard that has been subjected to this type of surface treatment as a surface layer, it may be partially affected by the impact force received on the manufacturing line. There may be cases where chipping occurs on the wood fiberboard.

The object of the present invention is to eliminate the occurrence of chipping of the wood fiberboard due to the impact force that tends to occur when a decorative material is manufactured using a wood base material whose surface layer is a wood fiberboard, and thereby the base material is eliminated. It is an object of the present invention to provide a decorative plate in which a material and a surface decorative material can be bonded well and a method for manufacturing the decorative plate.

Another object of the present invention is a decorative board which can reduce the occurrence of delamination phenomenon which tends to occur in a decorative material using a wood base material whose surface layer is a wood fiber board as a base material, and a method for producing the same. To provide. Still another object of the present invention is to provide a method for manufacturing a decorative board, which can omit a dry curing step and a sanding step of the surface when the surface decorative material is attached to the surface of the wooden base material.

[0010]

According to the present invention, at least one surface layer of the wood base material is a wood base material having a polymer compound other than a formalin resin on the surface of the wood fiber board. The decorative plate is characterized in that the impregnated layer is formed, and a surface decorative material is laminated on the impregnated layer via an adhesive layer.

Further, the above-mentioned problem is that after coating and impregnating the surface of the wood fiber board of the wood base material in which at least one surface layer is the wood fiber board with a polymer compound other than formalin resin,
This can be solved by bonding a surface decorative material on the uncured state or after curing, with an adhesive layer interposed therebetween.

The wood base material may be a wood fiber board as a whole, or a so-called wood fiber board composite board in which a wood fiber board is attached to one or both surfaces of another wood material such as a softwood plywood. Good. The wood fiberboard is the MD known in the past.
All wood fiber boards such as F and HB (hard board) are included. For example, as the MDF, U type referred to in JISA5905, M type, may be any of P-type, the specific gravity is of the order of ^{0.35g / cm 3 ~0.80g / cm 3} . The surface decorative material to be bonded may be a synthetic resin sheet, titanium paper, thin paper, or thin veneer used for conventional decorative boards, and is not particularly limited.

The polymer compound other than the formalin-based resin applied to the surface of the wood fiberboard has a resin-impregnated layer of high hardness on the surface layer of the wood fiberboard, that is, peeling between the fibers is less likely to occur, thereby making the fiberboard. Any polymer compound having a property of forming an impregnated layer that hardly causes chipping in the layer may be used, and may be a thermosetting type or a moisture curing type. Preferably, unsaturated polyester, acrylic urethane, moisture-curable urethane, silicone resin, epoxy resin, or the like is used. In the case of a moisture-curable type, those resins to which a curing accelerator such as ketimine is added may be used. These resins undergo three-dimensional cross-linking upon curing. As a result, the wood fibers, which are the materials of the wood fiber board, are strongly tightened, and the impact resistance and peel strength of the wood fiber board are improved.

The polymer compound is applied by a roll coater,
It may be applied by a conventionally known application device such as a spreader. The application amount is such that the applied polymer compound is impregnated from the surface of the wood fiber board by about 0.3 mm to 3 mm. Preferably, a 3 g / scale ² to 20 g / scale ² nm, the effect of preventing chipping or the like and it may be less poor, leading to deterioration in cost and workability that it further.

After the application of the polymer compound, the surface decorative material is attached via the adhesive layer. The bonding is performed by curing the polymer compound in a process such as ultraviolet irradiation or drying (hot air drying), then sanding the surface, and then applying an adhesive to the surface of the polymer compound-impregnated layer to apply the surface. A decorative material is adhered, or a surface decorative material having an adhesive layer formed on the back surface is directly adhered, and after adhering, they are integrated by, for example, thermocompression bonding by a thermocompression press.

As another embodiment of the bonding, an adhesive is applied on the applied polymer compound in an uncured state, and a surface decorative material is bonded at the same time, and after bonding,
For example, they are integrated by thermocompression bonding by a thermocompression press or laminated by a laminator.

When the adhesive is applied while the polymer compound is uncured, a moisture-curable polymer compound is preferably used as the polymer compound, and an emulsion adhesive or a formalin adhesive is used as the adhesive. . Particularly preferably, moisture-curable urethane is used as the polymer compound, and an aqueous adhesive such as an emulsion adhesive, a water-soluble adhesive, or a water-dispersible adhesive is used as the adhesive. In this case, since the water content of the adhesive contributes to the curing of the polymer compound, it is necessary to strengthen the wood fiberboard surface layer by curing the polymer compound and to bond the surface decorative material in the same step. It is possible to simplify the manufacturing process of the decorative plate. At that time, it is also possible to bond at the same time as heating with a hot press or the like.

In the present invention, the surface of the wood fiberboard, which is the surface layer of the substrate, is coated and impregnated with a polymer compound other than the formalin resin used in the production of the wood fiberboard to form the reinforcing layer. The impact resistance and peeling resistance of the wood fiber board are improved. Therefore, the chipping of the wood fiber board that has conventionally occurred when the surface decorative material is attached to the wood fiber board composite board is avoided, and further, when an impact force is applied to the surface of the decorative board from the outside, Peeling is also avoided.

[0019]

The present invention will be described below with reference to examples. [Example 1] 10 g of a polyester-type moisture-curable urethane resin was applied to the MDF surface of an MDF composite plate obtained by laminating a MDF having a thickness of 3 mm and a softwood plywood having a thickness of 9 mm.
After coating with a scale ² , immediately apply an aqueous SBR + urea melamine resin adhesive at 9 g / scale ² without curing the urethane resin, and apply a 0.3 mm thick oak veneer at 120 ° C., 7 kg / Pressed at cm ² for 60 seconds.
7g of amino alkyd paint on the surface of the composite board
/ Coating with a ruler ² to produce an MDF composite decorative board.

[Example 2] A polyether-type moisture-curing urethane resin was applied at a rate of 10 g / scale ² on the surface of an MDF composite board in which MDF having a thickness of 3 mm was attached to the front and back surfaces of a softwood plywood having a thickness of 6 mm. After that, the SBR + urea melamine resin adhesive, which is water-based, is immediately applied without curing the urethane resin at 9 g / square ² and a oak veneer having a thickness of 0.3 mm is applied, and the adhesive is applied at 120 ° C. and 7 kg / cm ² for 60 minutes. Pressed for seconds. Amino alkyd paint was applied to the surface of the veneer-bonded composite board at 7 g / square ² to produce an MDF composite decorative board.

[Embodiment 3] MDF having a thickness of 3 mm and a thickness of 9
mm of the MDF composite board laminated with a mm softwood plywood
Polyester type moisture curable urethane resin and polyether type moisture curable urethane resin on the DF surface 1
After applying the urethane resin blended with-one 20 g / scale ^2, SBR + urea melamine resin adhesive 9 g / rod ² is promptly aqueous without curing the urethane resin
And apply a 0.3 mm thick oak veneer,
It was pressed at 7 ° C. and 7 kg / cm ² for 60 seconds. Amino alkyd paint was applied to the surface of the veneer-bonded composite board at 7 g / square ² to produce an MDF composite decorative board.

[Embodiment 4] An HB in which a 3 mm thick HB (hard board) and a 9 mm thick softwood plywood are bonded together.
After coating the HB surface of the composite plate with a moisture-curing urethane resin having a hydrophilic group introduced at the end of a polyester-type moisture-curing urethane at 15 g / scale ² , immediately after curing the urethane resin, the water-soluble SBR + urea melamine resin adhesive bonding the Nara veneer coating with a thickness of 0.3mm at 9 g / scale ^2, 120 ° C., and 60 seconds pressed at 7 kg / cm ^2. Amino alkyd paint was applied to the surface of this veneer-composited composite plate at 7 g / scale ² to produce an HB composite decorative plate.

[Comparative Example 1] MDF having a thickness of 3 mm and a thickness of 9
mm of the MDF composite board laminated with a mm softwood plywood
A water-based SBR + urea melamine resin adhesive was applied to the DF surface at a rate of 10 g / square ² and a oak veneer having a thickness of 0.3 mm was applied, and pressed at 120 ° C. and 7 kg / cm ² for 60 seconds. Amino alkyd paint was applied to the surface of the veneer-bonded composite board at 7 g / square ² to produce an MDF composite decorative board.

[Comparative Example 2] A water-based SBR + urea melamine resin adhesive was applied to the surface of an HB composite plate in which 3 mm-thick HB was bonded to the front and back surfaces of a 6 mm-thick softwood plywood.
It was applied at 0 g / scale ² and a oak veneer having a thickness of 0.3 mm was applied, and pressed at 120 ° C. and 7 kg / cm ² for 60 seconds.

Amino alkyd paint was applied to the surface of this veneer-composited composite plate at 7 g / scale ² to produce an HB composite decorative plate. For each of them, a caster test, a plane tensile test, and a peel strength test were performed. Table 1 shows the results.

In the caster test, 2 casters are used.
After applying a load of 5 kg and reciprocating the test piece 3000 times at a distance of 100 mm in that state, visually observing the presence or absence of peeling of the decorative veneer, coating film, etc., and using a dial gauge, The maximum dent is measured to 1/100 mm, and at this time, the test piece makes one revolution in about 17 reciprocations and returns to the original position.

The plane tensile test is based on JAS (special plywood), and one side is 20 m on the surface of the test piece.
A metal plate having a square m-shaped bonding surface was bonded using a cyanoacrylate-based adhesive, and a cut having a depth reaching a wood fiberboard such as MDF was attached to the periphery, and then a plane tensile test was performed.

The peel strength test is in accordance with JIS-A5908. A square test piece having a side of 50 mm is adhered to a square aluminum block having a side of 50 mm, and a tensile load is applied perpendicularly to the surface of the test piece. In addition, the maximum load when peeling and breaking was measured and calculated.

[0029]

[Table 1]

[Embodiment 5] MDF having a thickness of 3 mm and a thickness of 9
mm of the MDF composite board laminated with a mm softwood plywood
DF surface is coated with polyester type resin at a rate of 10 g / scale ² and cured, then surface polished with a sander and then SB
R + urea melamine resin adhesive is applied at 9 g / scale ² and a 0.3 mm thick oak veneer is applied, 120 ° C, 7 kg / c
Pressed at m ² for 60 seconds. Amino alkyd paint was applied to the surface of the veneer-bonded composite board at 7 g / square ² to produce an MDF composite decorative board.

[Example 6] A two-component urethane sealer was applied and cured at 10 g / scale ² on the surface of an MDF composite plate in which 3 mm thick MDF was attached to the front and back surfaces of a 6 mm thick softwood plywood. After that, an SBR + urea melamine resin adhesive was applied at 9 g / scale ² and a oak veneer having a thickness of 0.3 mm was attached, and pressed at 120 ° C. and 7 kg / cm ² for 60 seconds.
7g of amino alkyd paint on the surface of the composite board
/ Coating with a ruler ² to produce an MDF composite decorative board.

[Embodiment 7] HB having a thickness of 3 mm and a thickness of 9 m
m of the softwood plywood of m is applied to the surface of the HB of the HB composite board with acrylic urethane resin at a rate of 10 g / scale ² and cured, and then acrylic modified vinyl acetate emulsion + urea melamine resin adhesive is applied at a rate of 9 g / scale ² . 0.3 after coating
6 mm at 120 ° C and 7 kg / cm ²
Press for 0 seconds. Amino alkyd paint was applied to the surface of this veneer-composited composite plate at 7 g / scale ² to produce an HB composite decorative plate.

[Embodiment 8] MDF having a thickness of 3 mm and a thickness of 9
mm of the MDF composite board laminated with a mm softwood plywood
Acrylic resin is applied to the surface of DF at a rate of 9 g / scale ² and cured, then the surface is ground with a sander, and acrylic modified vinyl acetate emulsion + urea melamine resin adhesive is applied at 9 g /
Apply with a ruler ² and apply a 0.3 mm thick oak veneer,
It was pressed at 0 ° C. and 7 kg / cm ² for 60 seconds. Amino alkyd paint was applied to the surface of the veneer-bonded composite board at 7 g / square ² to produce an MDF composite decorative board.

[Comparative Example 3] MDF having a thickness of 3 mm and a thickness of 9
mm of the MDF composite board laminated with a mm softwood plywood
After polishing the DF surface with a sander, apply SBR + urea melamine resin adhesive at 10 g / scale ² to a thickness of 0.3
6 mm at 120 ° C and 7 kg / cm ²
Press for 0 seconds. Amino alkyd paint was applied to the surface of the veneer-bonded composite board at 7 g / square ² to produce an MDF composite decorative board.

[Comparative Example 4] The surface of an MDF composite plate obtained by laminating 3 mm thick MDF on the front and back surfaces of a 6 mm thick softwood plywood was surface-polished with a sander, and then 9 g of SBR + urea melamine resin adhesive was used. 0.3m thick when applied with a scale ^2.
60m at 120 ℃, 7kg / cm ²
Pressed for seconds.

Amino alkyd paint was applied to the surface of this veneer-composited composite plate at 7 g / scale ² to produce an MDF composite decorative plate. For each of them, a caster test, a plane tensile test, and a peel strength test were performed in the same manner as in Example 1.
Table 2 shows the results.

[0037]

[Table 2]

As can be seen from Tables 1 and 2, the products of the present invention are clearly improved in dents and peeling of MDF by the caster test. From this, it can be seen that in the method for manufacturing a decorative board according to the present invention, it is possible to avoid chipping of MDF or the like during the manufacturing process, and peeling does not occur in the obtained product.

Also, as in the case of Examples 1 to 4, MD
When the adhesive is applied in a state where the polymer compound applied to the surface of F or the like is uncured and the surface decorative material is stuck and integrated,
Unlike the conventional process, the process of drying and curing before applying the adhesive and the process of sanding the adhesive surface are not required, and the working process is simplified.

[0040]

According to the method of the present invention, in the production of a decorative board having a wood fiberboard as a base material, it is possible to avoid chipping of the wood fiberboard during the manufacturing process, and the quality of the decorative board is improved. improves. It is also possible to avoid delamination of the fiberboard when an external impact is applied to the decorative board.

Claims (5)

[Claims] 1. An impregnated layer of a polymer compound other than a formalin-based resin is formed on the surface of the wood fiber board of a wood base material in which at least one surface layer is a wood fiber board, and an adhesive is formed on the impregnated layer. A decorative board characterized by being formed by laminating a surface decorative material through layers. 2. A wood base material in which at least one surface layer is a wood fiber board is coated and impregnated with a polymer compound other than a formalin-based resin on the surface of the wood fiber board, and then cured, and an adhesive layer is formed thereon. A method for manufacturing a decorative plate, which is characterized in that a surface decorative material is bonded to the surface through the surface. 3. A wood base material, at least one surface layer of which is a wood fiber board, is coated and impregnated with a polymer compound other than a formalin-based resin on the surface of the wood fiber board, and the polymer compound is in an uncured state. A method for manufacturing a decorative board, which comprises forming an adhesive layer on the adhesive layer, and simultaneously laminating the surface decorative material at the same time as curing the polymer compound. 4. The method for producing a decorative board according to claim 3, wherein the polymer compound is a moisture-curable type, and the adhesive is a water-based adhesive. 5. The method for manufacturing a decorative board according to claim 3, wherein the bonding is performed by a hot press.