JP4610061B2 - Decorative panel - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a decorative panel used for building joinery, interior materials, furniture members, and the like, and more particularly to a decorative panel that is not warped due to environmental changes and is excellent in strength.
[0002]
[Prior art]
Conventionally, decorative panels used for architectural joinery, interior materials, furniture members, etc. are mainly made by laminating a decorative sheet on a wood-based core material such as plywood, particle board, medium density fiberboard (hereinafter referred to as MDF). It was used. However, the wood core material has the property of repeatedly absorbing and releasing moisture depending on the surrounding environment, especially humidity. If the decorative sheet is laminated on the surface and nothing is adhered to the back surface, warping of the decorative panel is inevitable. . In addition, when decorative sheets are laminated on both sides, there is a problem that if the material of the decorative sheet is different between the front and back surfaces, the moisture permeability is different and the arrow warping cannot be avoided. For this reason, a method of laminating a moisture-proof sheet on both sides and further laminating a decorative sheet on the surface side has been studied. However, there is a disadvantage that the cost increases due to an increase in both processes and materials used.
Further, the wood core material is not necessarily strong in strength, and there is a problem that when the article is strongly hit, it is dented together with the decorative layer on the surface or the decorative layer is torn.
[0003]
[Problems to be solved by the present invention]
It is an object of the present invention to provide a decorative panel excellent in strength while solving the above-described problems, that is, the problem of warping in building joinery, furniture members and the like.
[0004]
[Means for Solving the Problems]
In the present invention, the above-mentioned problems are solved by a decorative panel in which a metal-based decorative sheet in which a reinforcing layer is integrated on the surface of a wood core and a moisture-proof sheet on the back surface.
[0005]
The metal-based decorative sheet laminated on the surface of the wood core is made of a decorative layer on the metal sheet surface and a reinforcing layer laminated on the back surface, and the metal sheet is a sheet of aluminum, stainless steel, copper, etc. Is used.
The decorative layer is a decorative finish by printing, painting, etc., a decorative finish by adhering a decorative sheet such as a decorative resin sheet, and a cosmetic impregnated sheet in which a melamine resin, a polyester resin, etc. are impregnated into the printed decorative paper is hot-pressed. Is provided by means such as a decorative finish.
The reinforcing layer on the back surface is made by impregnating a fibrous base material such as paper or non-woven fabric with a thermosetting resin such as phenol resin or polyester resin, and the combined impregnated sheet is heated and integrated, The impregnated sheet is integrated on the back surface with an adhesive as a molded sheet pre-heated.
When a cosmetic impregnated sheet is used, it is desirable that the sheet is molded and integrated at once in a hot-pressure condition that satisfies the conditions for curing the impregnating resin and the impregnating resin used for the reinforcing layer on the back surface.
The combination of the decorative layer and the reinforcing layer may be selected in consideration of the use of the processed product.
The thickness of the metal sheet is suitably 50~300μ m. If it is less than 50 μm , the strength is insufficient, and it tends to become wrinkles, which is difficult and difficult to handle. On the other hand, if it is larger than 300 μm, the quality becomes excessive and the cost is not suitable.
[0006]
As described above, a woody core material such as plywood, particle boat, or MDF is used as the woody core material. In the present invention, a plate body having a thickness of 5 to 20 mm is preferably used.
[0007]
As a moisture-proof sheet laminated on the back side, in addition to olefin resin sheets such as polyethylene and polypropylene, polyester sheets, resin sheets such as acrylic resins, or composite sheets in which paper, nonwoven fabric, cloth, etc. are laminated on these resin sheets, In addition, there are metal foils such as aluminum and stainless steel, and those obtained by bonding paper, nonwoven fabric, cloth or the like to these metal foils.
The resin sheet used for these resin sheets or composite sheets, and the thickness of the metal foil or the like is desirably 0.05 to 1 mm in view of moisture-proof performance or cost.
In addition, when an olefin resin sheet lacking adhesiveness is used for the resin sheet, ozone treatment or ultraviolet irradiation is performed to ensure adhesion at the time of processing of the moisture-proof sheet or adhesion at the time of bonding processing of the decorative panel. It is desirable to use an activated material such as oxidized surface of the resin sheet by treatment.
[0008]
In addition to adhesives such as rubber adhesives, urethane resin adhesives, hot-melt adhesives, etc., metal decorative sheets and moisture-proof sheets are used for adhesion between metal-based decorative sheets, wood cores, and moisture-proof sheets. If there is adhesion suitability, water-based adhesives such as vinyl acetate resin emulsion, ethylene / vinyl acetate resin emulsion, vinyl acetate / acrylic resin emulsion can be used.
For the bonding operation, a known bonding method may be adopted depending on each adhesive.
[0009]
As the end shape of the wood core material, a curved surface or other shapes are adopted in addition to a case perpendicular to the front and back surfaces. The finish of the end of the wood core material is such that the resin edge material is bonded to the end surface of the wood core material, or when the end shape is curved, the metal decorative sheet is continuously wound up to the end surface or the back surface. Bonded and finished.
The resin edge material is made of a thermoplastic resin such as ABS resin, vinyl chloride resin, polyester resin, nylon resin, polyethylene resin, etc., which is molded into a tape shape with a thickness of 0.2 to 5 mm. The rim pasting process with a base adhesive is suitable in light of the processing speed and the finished appearance.
[0010]
Next, the present invention will be described in detail with reference examples, examples and comparative examples.
[ Reference example ]
Metal makeup made by integrating three impregnated sheets impregnated with kraft paper with a grammage of 200 g / m ² on the back of an aluminum sheet 150 μm thick color-coated with an acrylic resin-based paint. The sheet was adhered to the front and back of a particle board having a thickness of 18 mm, a length of 700 mm, and a width of 450 mm employed as a wooden core material with a rubber adhesive.
Further, a decorative panel of a reference example was prepared by adhering a 1.0 mm-thick edge pasting material made of ABS resin around the edge with a hot melt adhesive.
[0011]
[Example 1 ]
The surface of the same aluminum sheet as used in the reference example is impregnated with impregnated decorative paper in which a basis weight of 80 g / m ² decorative paper is impregnated with melamine resin, and the same three impregnated sheets as in the reference example are arranged on the back side. A moisture-proof sheet in which a pressure-molded metallic decorative sheet is adhered to the same particle board surface as that used in the reference example with a rubber adhesive, and paper is adhered to the back and back of a 50 μm polyester resin sheet on the back surface of the particle board. Adhesion was made with a vinyl acetate resin emulsion adhesive. The edge part was finished like the reference example, and the decorative panel of Example 1 was prepared.
[0012]
Comparative Example 1
The metal-based decorative sheet used in the reference example on the surface of the same particle board used in the reference example , and the impregnated decorative paper used in Example 1 and the three impregnated sheets used in the reference example are stacked on the back surface for hot pressing. The decorative panel of Comparative Example 1 was prepared by bonding the 0.8 mm melamine resin decorative plates each with a rubber adhesive and finishing the ends in the same manner as in the Reference Example .
[0013]
Comparative Example 2
A 150 μm thick aluminum sheet is adhered to the surface of the same particle board as used in the reference example with a rubber adhesive, and the same moistureproof sheet as used in Example 1 is adhered to the back surface of the particle board with a vinyl acetate resin emulsion. Glued with an agent.
A decorative panel of Comparative Example 2 was prepared by finishing the ends in the same manner as in the Reference Example .
[0014]
The results of the following evaluation tests on the decorative panels of Reference Examples, Examples and Comparative Examples are shown in Table 1.
[Table 1]
[0015]
Evaluation test Warp test: Each decorative panel prepared in Reference Example, Example, and Comparative Example was allowed to stand for 7 days under conditions of temperature 20 ° C. and humidity 60%, and then for 7 days under conditions of 40 ° C. and humidity 90%. The maximum distance at which the decorative panel is separated from the line connecting the both ends in the 700 mm direction with a straight line at the time of leaving is measured as warpage (mm).
Impact resistance test: A steel ball having a diameter of 19 mm and a mass of 28.1 g is dropped from the height of 100 mm to the surface of each decorative panel, and the presence or absence of surface abnormality is determined.
[0016]
【effect】
The decorative panel according to the present invention has a metal-based decorative sheet in which a reinforcing layer is integrated on the surface of a wood core, a moisture-proof sheet on the back, and a resin edge material on the end. Alternatively, since the metal-based decorative sheet is continuously bonded to the front and end portions of the wooden core material, and the moisture-proof sheet is bonded to the back surface, any external moisture spreads to the internal wooden core material. Without the expansion and contraction of the wood core material due to moisture change. For this reason, the curvature as a decorative panel hardly occurs.
In addition, the back side of the metal-based decorative sheet is integrated with a reinforcing layer composed of a composite of thermosetting resin and reinforcing fibers, so it has excellent strength and can be dented or damaged even if an article falls and collides with it. There is no. Furthermore, fire resistance due to the flame shielding effect of the metal sheet can be expected.
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Claims (1)

A metal-based decorative sheet in which a metal sheet with a decorative layer and an impregnated sheet in which a thermosetting resin and a fibrous base material are combined is heat-pressure integrated is adhered to the surface of the wood core, and the back surface A decorative panel comprising a composite sheet in which paper is laminated on a resin sheet made of polyester resin.