JP3184577U - Mirror board - Google Patents

Abstract

The present invention provides a specular board in which glossiness and transparency of a surface are greatly improved.
A melamine resin layer 12 is formed on a surface of a board 11, a polyurethane resin transparent film 13 is formed on the melamine resin layer, and an ultraviolet curable resin is formed on the polyurethane resin transparent film. A transparent coating film 14 of a mold resin is formed, and the surface of the transparent coating film of the ultraviolet curable resin is mirror-finished. The melamine resin layer is formed to a thickness of 0.1 mm or more, the transparent coating film of polyurethane resin is formed to a thickness of 0.1 mm or more, and the transparent coating film of the ultraviolet curable resin is 0.15 mm or more in thickness. It is preferable to form the film thickness.
[Selection] Figure 2

Description

  The present invention relates to a specular board, and more particularly to a specular board excellent in transparency and gloss.

  Mirror boards with beautiful grain are often used for top boards such as living tables and center tables.

  When manufacturing this specular board, after repeating the work of applying a polyester resin paint etc. to the surface of a natural plate material, curing it and polishing it smoothly, and finally polishing the surface by buffing is known. (Patent Document 1).

  However, with this mirror board, the wood grain of the plate material can be seen as it is. Therefore, when producing a high-quality wood grain mirror board, it is necessary to use a high-quality board member with a beautiful grain, which increases the cost.

  On the other hand, a base paint is applied to the surface of a medium density fiberboard (hereinafter referred to as “MDF”), polished after curing, and after transferring or printing a natural wood grain pattern thereon, a transparent finish paint is applied. Mirror boards that have been manufactured by finishing polishing after curing have been proposed (Patent Documents 2 and 3).

  However, although this mirror board is cheaper than when resin paint is applied to natural wood, the printed layer and transfer layer are very thin, and the impression received from the wood grain pattern is thin, so it differs greatly from natural wood. Inferior in appearance.

  Further, a melamine resin layer having a thickness of 0.1 mm or more is formed on the surface of the medium density fiber board by laminating a melamine resin sheet having a grain pattern and having a thickness of 0.15 mm or more on the medium density fiber board and performing high pressure pressing. On the melamine resin layer, a polyurethane resin coating film having a thickness of 0.05 mm or more is polished and applied repeatedly to form a polyurethane resin transparent coating film having a thickness of 0.1 mm or more. A specular board that has been mirror-finished has been proposed (Patent Document 4).

JP 2006-181492 A JP 2007-1111859 A JP 2000-61392 A Utility Model Registration No. 3181575

  In the mirror board described in Patent Document 4, although the glossiness of the surface is superior to that of the mirror boards described in Patent Documents 1 to 3, it is required to further increase the glossiness.

  An object of the present invention is to provide a specular board in which the glossiness of the surface is greatly increased in such a situation.

  Therefore, in the mirror board according to the present invention, a melamine resin layer is formed on the surface of the board, a transparent coating film of polyurethane resin is formed on the melamine resin layer, and on the transparent coating film of the polyurethane resin. Is characterized in that a transparent coating film of an ultraviolet curable resin is formed, and the surface of the transparent coating film of the ultraviolet curable resin is mirror-finished.

  The inventors of the present invention examined a wood grain specular board in which a wood grain pattern was transferred or printed on an MDF and a transparent coating film was formed thereon. The transfer layer and the printed layer were very thin, 0.05 mm or less. However, the impression received was very different from the grain of natural wood.

  One of the features of the present invention is that a melamine resin sheet is used instead of a transfer layer or a printing layer, and the melamine resin layer is formed on the board surface by heating.

  As a result, the melamine resin layer was formed on the board with a clean surface. Therefore, when a wood grain pattern was formed on the melamine resin layer, it was confirmed that the wood grain pattern gave an impression similar to that of natural wood. As a result, it is possible to manufacture a high-quality wood grain specular board that is mistaken for a wood grain board using a natural plate material.

  The main feature of the present invention is that a transparent coating film of polyurethane resin is formed on the melamine resin layer of the board, and a transparent coating film of UV curable resin is formed thereon, and the surface is mirror-finished. In the point.

  As a result, due to the characteristics of the UV curable resin, the glossiness of the surface is significantly increased compared to the case of a transparent coating film of polyurethane resin, and the transparency is excellent, producing a very beautiful mirror board. it can.

  Regarding the thickness of the melamine resin layer, the polyurethane resin transparent coating and the UV curable resin transparent coating, for example, the melamine resin layer is formed to a thickness of 0.1 mm or more, and the polyurethane resin transparent coating is 0.1 mm or more. The transparent coating film of the ultraviolet curable resin is preferably formed to a thickness of 0.15 mm or more.

  The melamine resin sheet is made by dissolving methylol melamine in a solvent and impregnating with a filler such as paper. When this melamine resin sheet is heated, the methylol melamine liquefies, undergoes polycondensation and crosslinks to form a thermosetting melamine. It becomes resin.

  The plasticity of the ultraviolet curable resin is not particularly limited, and an acrylate radical polymerization resin or an epoxy cation polymerization resin mainly composed of an epoxy modified acrylate, a urethane modified acrylate, and a silicone modified acrylate can be used.

1 is a schematic perspective view showing an embodiment of a wood grain specular board according to the present invention. It is principal part sectional drawing which shows the said embodiment. It is a figure which shows the manufacturing process of the said embodiment.

  Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 to 3 show a preferred embodiment of a wood-specular board according to the present invention. In the figure, a wood grain specular board 10 is manufactured based on a wooden board 11. A wood pattern melamine resin layer 12 having a thickness of 0.1 mm is formed on the surface and side end surfaces of the wooden board 11. A polyurethane resin (PU resin) having a thickness of 0.1 mm is transparent on the upper side of the melamine resin layer 12. A coating film 13 is formed, and a transparent coating film 14 of UV curable resin (UV resin) having a thickness of 0.15 mm to 0.2 mm is formed on the transparent coating film 13 of PU resin, and its surface is mirror-finished. ing.

  When producing the wood grain specular board 10 of this example, a 0.15 mm thick melamine resin sheet having a wood grain pattern is prepared. This melamine resin sheet 12 is overlaid on the upper surface of a wooden board 11 having a predetermined thickness, for example, MDF, plywood or particle board (step S10).

  Next, the wooden board 11 laminated with the melamine resin sheet 12 is sandwiched between two upper and lower stainless plates, and the temperature is within a temperature range where the methylol melamine of the melamine resin sheet 12 is liquefied, for example, within a range of 180 ° C to 190 ° C. Heat and pressurize (step S11).

  Then, the methylol melamine of the melamine resin sheet is liquefied and attached to the wooden board 11, and the methylol melamine undergoes polycondensation and crosslinks to become a thermosetting melamine resin, and the melamine resin layer 12 is formed. Since the thickness of the melamine resin sheet before heating is 0.15 mm or more, the melamine resin layer 12 is liquefied uniformly while the surface grain pattern is clean and is reduced to about 0.1 mm.

  Since the fats and oils derived from petroleum products are adhered to the surface of the melamine resin layer 12, the fats and oils are removed using a polishing cloth or the like (step S12). At that time, it is carefully polished so that the melamine resin layer 12 is not broken.

  Next, a transparent PU resin paint is applied onto the melamine resin layer 12 using a spray, a brush, a roll coater or the like. When the paint is cured, the surface is polished smoothly using a polishing cloth or the like so that the thickness of the coated film after polishing is 0.05 mm or more (step S13). The method of curing the paint is not particularly limited, such as baking, and a known method can be adopted.

  A transparent PU resin paint is applied onto this transparent paint film, and when the paint is cured, the surface is polished smoothly using a polishing cloth or the like so that the thickness of the paint film after polishing is 0.05 mm or more. (Step S14), a transparent coating film 13 of PU resin having a thickness of 0.1 mm or more as a whole is formed.

  On this polyurethane resin transparent coating film 13, a UV resin coating is applied using a spray, a brush or a roll coater, and the coating is cured by irradiating ultraviolet rays. When the coating is cured, the surface is smooth and mirror-finished using a buff or the like so that the thickness of the coated film after polishing is 0.15 mm to 0.2 mm (step S15). A high-hardness wood grain specular board with excellent resistance.

In general, the properties of the coating film depend on the base, and unless the base is smooth and high in hardness, the hardness and smoothness of the resulting coating are not sufficient.
In this example, when the properties of the coating film 14 of UV resin are considered, since the base is a hard and smooth melamine resin layer 12, the resulting coating film 14 of UV resin is also smooth, high in hardness, and transparent. The mirror board 10 excellent in the property and the surface glossiness is obtained.

  The wood grain specular board 10 of this example can be used as a substitute for a wood board for any application that uses a wood board, such as furniture and interior building materials.

  In the above example, the wood-mirror surface melamine resin layer is formed, but a plain mirror surface melamine resin layer may be formed. Moreover, although wooden boards, such as MDF, a plywood, and a particle board, were used in said example, boards, such as a fire prevention board which laminated | stacked concrete, quartz sand, etc., can also be used.

10 Wood Mirror Board 11 Wooden Board 12 Melamine Resin Layer 13 Polyurethane Resin Transparent Coating 14 UV Curing Resin Transparent Coating

Claims (3)

  A melamine resin layer (12) is formed on the surface of the board (11), and a transparent coating film (13) of polyurethane resin is formed on the melamine resin layer (12). A transparent board (14) of an ultraviolet curable resin is formed on 13), and the surface of the transparent coating (14) of the ultraviolet curable resin is mirror-finished.   The melamine resin layer (12) is formed to a thickness of 0.1 mm or more, the transparent coating film (13) of the polyurethane resin is formed to a thickness of 0.1 mm or more, and the transparent coating film of the ultraviolet curable resin. The specular board according to claim 1, wherein (14) is formed to a thickness of 0.15 mm or more. The specular board according to claim 1, wherein a wood grain pattern is formed on the melamine resin layer (12).

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