JP6294698B2 - Manufacturing method of decorative composite board - Google Patents

Description

  The present invention relates to a method for manufacturing a decorative composite board used as a building material such as a flooring material or a wall material or a furniture material.

  For example, as shown in FIG. 8, a decorative composite board 50 formed by sequentially laminating a surface decorative material 53 such as a plywood 51, a wood fiber board (hereinafter referred to as MDF) 52, and a veneer is usually as shown below. It is manufactured by a simple method. First, as shown in FIG. 9 (a), the MDF 52 is placed on the surface of the plywood 51 via the adhesive a1, and this is pressed into the MDF as shown in FIG. 9 (b). 10 is manufactured, a surface decorative material 53 is placed on the surface of the composite plate CP (the surface of the MDF 52) via an adhesive a2, as shown in FIG. As shown in FIG. 2B, the decorative composite board 50 is manufactured by pressing and fixing the surface decorative material 53 to the composite board CP.

Japanese Patent Laid-Open No. 08-224705 JP 2008-254397 A

  By the way, when manufacturing the decorative composite board 50 through the two-step pressing process as described above, the MDF 52 is usually bonded to the plywood 51 and the first pressing process for attaching the MDF 52 to the plywood 51. Since it is performed in a separate line from the second pressing step of attaching the surface decorative material 53 to the fixed composite plate CP, the composite plate CP in which the MDF 52 is bonded and fixed to the plywood 51 is subjected to the first pressing process. Since the transportation cost for transporting from the line to the second pressing processing line is required and the pressing processing cost for the second time is required, the decorative composite board 50 can be efficiently manufactured at low cost. There wasn't.

  For this reason, as shown in FIGS. 11A to 11C, after applying the adhesive a1 to the surface of the plywood 51, the MDF 52 is placed on the plywood 51 and further adhered to the surface of the MDF 52. It is hoped that the plywood, the MDF and the surface decorative material are bonded at the same time in one pressing process, for example, the surface decorative material 53 is placed on the MDF 52 and pressed after the agent a2 is applied. It is rare.

  However, normally, as shown in FIG. 12, the application of the adhesive to the plate material is performed by using the coating roll CR and the backup roll BR of the roll coater RC having the coating roll CR, the doctor roll DR, and the backup roll BR. Since it is performed by inserting and sending out, in order to further apply the adhesive on the surface of the MDF 52 placed on the plywood 51 via the adhesive, the MDF 52 is simply placed via the adhesive. If the plywood 51 is sandwiched and fed between the coating roll CR and the backup roll BR of the roll coater RC, the MDF 52 that is not bonded and fixed to the plywood 51 may be displaced with respect to the plywood 51, and the MDF 52 is once displaced. Then, it is difficult to correct the misalignment Therefore, as described above, after the MDF 52 is once bonded and fixed to the plywood 51, the surface decorative material 53 must be pasted, and mass production of the decorative composite board 50 in one pressing process is realistic. It was impossible.

  Then, the subject of this invention is providing the manufacturing method of the decorative composite board which can mass-produce a decorative composite board by one press-fit process.

In order to solve the above problems, the invention according to claim 1 includes a step of applying an adhesive to the surface of the plywood, and a step of placing a wood fiber board or resin-impregnated paper on the plywood to which the adhesive has been applied. And the surface of the wood fiber board or resin-impregnated paper placed on the plywood via the adhesive without heat-pressing the laminate on which the plywood, wood fiber board or resin-impregnated paper is laminated via the adhesive A step of applying an adhesive using a roll coater, a step of placing a surface decorative material on a wood fiber board or resin-impregnated paper coated with the adhesive, and a plywood or wood fiber board via the adhesive or resin impregnated paper, and a step of hot-pressing the laminate surface decorative material are sequentially laminated on the surface of the plywood, which have a viscosity of 25000~72000mPa · s / 2~30 ℃, modified vinyl acetate-series Water-based adhesive or water-based vinyl urethane resin adhesive Coating fabric weight of that was applied so as to 8.0～9.0G / scale ^2, the wood fiber board or the surface of the resin-impregnated paper has a viscosity of 25000~30000mPa · s / 2~30 ℃, The present invention provides a method for producing a decorative composite board, wherein an SBR adhesive or a urea melamine resin adhesive is applied .

  In addition, the viscosity of the adhesive applied to the surface of the plywood was set to 25000-72000 mPa · s / 2-30 ° C. When the viscosity was less than 25000 mPa · s / 2-30 ° C., the adhesive was applied on the plywood. When the adhesive is applied to the surface of the wood fiber board or resin-impregnated paper placed through the roll coater, the wood fiber board or resin-impregnated paper placed on the plywood is held in that position. This is because, when the viscosity exceeds 72000 mPa · s / 2 to 30 ° C., the coating cannot be performed uniformly and uneven coating may occur.

Also, The defined coating amount of adhesive applied to the surface of the plywood 8.0～9.0G / rod ^2, when the coating amount exceeds 9.0 g / scale ^2, the adhesive on the plywood The wood fiber board or resin-impregnated paper placed on the plywood is likely to be displaced due to the pressure when the adhesive is applied to the surface of the wood fiber board or resin-impregnated paper placed through the roll coater. If the coating amount is less than 8.0 g / scale ² , sufficient adhesion cannot be ensured, and the wood fiber board or the resin-impregnated paper may be peeled off.

As mentioned above, in the manufacturing method of the decorative composite board of the invention according to claim 1, the adhesive applied to the surface of the plywood has a viscosity of 25000-72000 mPa · s / 2-30 ° C. Since the coating amount is set to 8.0 to 9.0 g / scale ² , the laminate on which the plywood, the wood fiber board or the resin-impregnated paper is laminated via the adhesive is not hot-pressed on the plywood. When the adhesive is applied to the surface of the wood fiber board or resin-impregnated paper placed through the adhesive using a roll coater, the wood fiber board or resin-impregnated paper placed on the plywood is displaced. It is difficult to efficiently produce a decorative composite board in a single pressing step.

It is process drawing which shows the manufacturing method of the decorative composite board which concerns on this invention. It is the schematic which shows the adhesive agent application process [1] in the manufacturing method of a decorative composite board same as the above. (A), (b) is the schematic which shows the surface material mounting process in the manufacturing method of a decorative composite board same as the above. It is the schematic which shows the adhesive agent application process [2] in the manufacturing method of a decorative composite board same as the above. (A), (b) is the schematic which shows the surface decorative material mounting process in the manufacturing method of a decorative composite board same as the above. (A), (b) is the schematic which shows the hot press process in the manufacturing method of a decorative composite board same as the above. It is a side view which shows the decorative composite board manufactured by the manufacturing method same as the above. It is sectional drawing which shows a common decorative composite board. (A), (b) is process drawing for demonstrating the conventional manufacturing method of a decorative composite board. (A), (b) is process drawing for demonstrating the conventional manufacturing method of a decorative composite board. (A)-(c) is process drawing which shows the manufacturing process of the decorative composite board conventionally desired. It is a schematic block diagram which shows the general roll coater used at the application | coating process of the adhesive agent with respect to a board | plate material.

  Hereinafter, although the manufacturing method of the decorative composite board of this invention is demonstrated with reference to drawings, the manufacturing method of the decorative composite board of this invention is not limited to this Example.

  As shown in FIG. 7, the decorative composite board 1 to be manufactured has a surface layer material 12 made of MDF having a thickness of 2.7 mm and a thickness of 0 on a wooden base material 11 made of a 5-ply plywood having a thickness of 9 mm. A surface decorative material 13 composed of a .25 mm veneer is sequentially laminated and bonded with water-based adhesives WA and WB, and, as shown in FIG. ], A surface layer material placing step, an adhesive application step [2], a surface decorative material placing step, and a series of steps consisting of a hot pressing step.

First, as shown in FIG. 2, by passing the wood substrate 11 between the coating roll CR and the backup roll BR of the roll coater RC, the aqueous adhesive WA is applied to the upper surface (adhesive application step [ 1]). As the water-based adhesive WA, a modified vinyl acetate adhesive whose viscosity is adjusted to 25,000 to 72000 mPa · s / 2 to 30 ° C. is used, and its coating amount is 8.0 to 9.0 g / scale ² . is there.

  Subsequently, as shown in FIGS. 3A and 3B, a surface layer material 12 made of MDF having a thickness of 2.7 mm is placed on the upper surface of the wooden base material 11 to which the aqueous adhesive WA has been applied (surface layer). Material placing step). Here, when the surface layer material 12 is displaced with respect to the wooden base material 11, it is necessary to correct the displacement. In particular, in this embodiment, since the thickness of the MDF constituting the surface layer material 12 is relatively thick at 2.7 mm, there is an advantage that the surface layer material 12 is not easily damaged when correcting the displacement of the surface layer material 12. is there.

Next, as shown in FIG. 4, by passing the wood substrate 11 on which the surface layer material 12 is placed via the aqueous adhesive WA between the coating roll CR and the backup roll BR of the roll coater RC, After applying 8.5 g / scale ² of an SBR-based aqueous adhesive WB having a viscosity of 25000 to 30000 mPa · s / 2 to 30 ° C. on the upper surface (adhesive application step [2]), FIG. As shown in (b), a surface decorative material 13 made of a 0.25 mm thick projecting plate is placed on the upper surface of the surface layer material 12.

In this way, the wooden substrate 11 on which the surface layer material 12 and the surface decorative material 13 are sequentially placed via the water-based adhesives WA and WB is heated to a hot plate as shown in FIGS. 6 (a) and 6 (b). When sandwiched by HP and hot-pressed at 105 to 115 ° C. and a pressure of 6 to 7 kgf / cm ² for 70 to 80 seconds, a decorative composite board 1 shown in FIG. 7 is completed.

As described above, in this method for manufacturing a decorative composite board, the aqueous adhesive WA applied to the surface of the wooden substrate 11 has a viscosity of 25,000 to 72000 mPa · s / 2 to 30 ° C., and the coating amount is 8 Since it is set to 0.0 to 9.0 g / scale ² , a roll coater RC is used to apply the aqueous adhesive WB to the surface of the surface layer material 12 placed on the wooden substrate 11 via the aqueous adhesive WA. When the coating is applied, the surface layer material 12 placed on the wooden substrate 11 is not easily displaced.

  Therefore, before applying the water-based adhesive WB to the surface of the surface layer material 12, the surface material 12 is pressed by pressing the wood substrate 11 on which the surface layer material 12 is placed via the water-based adhesive WA. It is not necessary to bond and fix to 11 in advance. As described above, the wooden base material 11, the surface layer material 12, and the surface decorative material 13 are sequentially laminated on one production line, and the pressing process is performed once. Since the wood base material 11, the surface layer material 12 and the surface decorative material 13 can be bonded and integrated, the first pressing step for adhering the surface layer material to the wood base material and the surface layer material to the wood base material Unlike the conventional manufacturing method, in which the second pressing process for adhering the surface decorative material to the composite plate to which the material is bonded and fixed must be performed in a separate line, the composite plate is pressed for the first time. Transport cost for transporting from the processing line to the second pressure processing line Together becomes unnecessary, so requires only one time of pressing process costs, it is possible to produce a decorative composite plate 1 efficiently at low cost.

In the embodiment described above, a modified vinyl acetate-based water-based adhesive is used as the water-based adhesive WA applied to the upper surface of the wooden substrate 11, but the present invention is not limited thereto. It is also possible to use a vinyl urethane resin adhesive. However, the adhesive to be used needs to be adjusted to a viscosity in the range of 25000 to 72000 mPa · s / 2 to 30 ° C., and the coating amount is also in the range of 8.0 to 9.0 g / scale ^2. There must be.

  In the above-described embodiment, the SBR adhesive is used as the water-based adhesive WB to be applied to the upper surface of the surface layer material 12, but is not limited thereto. For example, a urea melamine resin-based adhesive is used. It is also possible to use an adhesive.

  In the embodiment described above, MDF having a thickness of 2.7 mm is used as the surface layer material 12, but the thickness of the MDF is not particularly limited, and resin-impregnated paper can be used instead of MDF. It is.

  Moreover, in the Example mentioned above, although the veneer which consists of beech, oak, a jar, chestnut etc. is used as the surface decoration material 13, it is not limited to this, Various decorative sheets can also be used. Is possible.

  INDUSTRIAL APPLICABILITY The present invention can be used when manufacturing a decorative composite board used as a building material such as a flooring material or a wall material or a furniture material.

DESCRIPTION OF SYMBOLS 1 Makeup composite board 11 Wood base material 12 Surface layer material 13 Surface decoration material BR Backup roll CR Coating roll DR Doctor roll HP Hot plate RC Roll coater WA, WB Water-based adhesive

Claims (1)

Applying an adhesive to the surface of the plywood;
Placing a wood fiber board or resin-impregnated paper on a plywood coated with an adhesive;
Adhering to the surface of wood fiber board or resin impregnated paper placed on the plywood via adhesive without heat-pressing the laminated body of plywood, wood fiber board or resin impregnated paper via adhesive Applying the agent using a roll coater;
Placing a surface decorative material on a wood fiberboard or resin-impregnated paper coated with an adhesive;
A step of heat-pressing a laminated body in which a plywood, a wood fiber board or a resin-impregnated paper, and a surface decorative material are sequentially laminated through an adhesive,
On the surface of the plywood, which have a viscosity of 25000~72000mPa · s / 2~30 ℃, an aqueous adhesive or aqueous vinyl urethane resin-based adhesive of the modified vinyl acetate-based, coating fabric of its is 8.0 Apply to 9.0g / scale ² ,
A decorative composite board characterized in that an SBR adhesive or a urea melamine resin adhesive having a viscosity of 25,000 to 30000 mPa · s / 2 to 30 ° C. is applied to the surface of a wood fiber board or resin-impregnated paper. Manufacturing method.

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