JP2002079609A - Decorative panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that a decorative panel, wherein a decorative material of each kind is bonded to a woody core material, is widely used in a door for furniture, fittings for building or the like but, since the woody core material is expanded and contracted by a change in external environment, especially, in humidity, warpage is not avoided and, since the surface of the decorative panel is depressed when an article is strongly struck against the decorative panel, the decorative panel is insufficient from an aspect of strength. SOLUTION: The decorative sheet is constituted by bonding a metal decorative sheet having a reinforcing layer integrated with the rear surface thereof and a moistureroof sheet to the upper and rear surfaces of the woody core material. By this constitution, the warpage of the decorative sheet can be solved, and the strength and impact resistance thereof are enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to decorative panels used for architectural fittings, interior materials, furniture members and the like, and more particularly to decorative panels which are not warped by environmental changes and have excellent strength.

[0002]

2. Description of the Related Art Conventionally, decorative panels used for architectural fittings, interior materials, furniture members, etc. mainly include a decorative sheet laminated on a wood-based core material such as plywood, particle board, medium density fiberboard (hereinafter referred to as MDF). What had been used was used. However, the wood core material has the property of repeatedly absorbing and releasing moisture depending on the surrounding environment, particularly humidity, and if a decorative sheet is laminated on the front surface and nothing is adhered to the back surface, warping of the decorative panel was inevitable. . Further, when a decorative sheet is laminated on both sides, there is a problem that if the material of the decorative sheet is different on the front and back sides, the moisture permeability is different and the bowing warpage cannot be avoided. For this reason, after laminating a moisture-proof sheet on both sides,
Further, a method of laminating a decorative sheet on the front side has been studied, but there is a disadvantage that the cost increases because the number of processes and materials used increase. Further, the wood core material is not necessarily strong in terms of strength, and there has been a problem that when the article is strongly hit, the wood core material is dented with the decorative layer on the surface or the decorative layer is broken.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, that is, to solve the problem of warpage in architectural fittings and furniture members, and to provide a decorative panel excellent in strength.

[0004]

According to the present invention, there is provided a metal decorative sheet in which a reinforcing layer is integrated on the surface of a wood core material.
This problem has been solved by a decorative panel having a moisture-proof sheet laminated on the back surface.

[0005] The metal decorative sheet laminated on the surface of the wood core material has a decorative layer applied to the surface of the metal sheet and a reinforcing layer laminated on the back surface. The metal sheet may be made of aluminum, stainless steel, copper or the like. Etc. are used.
The decorative layer is a decorative finish by printing, painting, etc., a decorative finish by bonding a decorative sheet such as a decorative resin sheet, and a decorative impregnated sheet in which melamine resin, polyester resin, etc. are impregnated into a printed decorative paper. It is provided by means such as a decorative finish which is laminated. The reinforcing layer on the back side is obtained by impregnating a fibrous base material such as paper or nonwoven fabric with a thermosetting resin such as a phenolic resin or a polyester resin, and then pressing the integrated impregnated sheet to form a single unit, or integrating a plurality of sheets. The impregnated sheet is integrated with the backside by an adhesive as a pre-heated molded sheet. When a cosmetically impregnated sheet is used, it is desirable that the sheet be integrally formed at a time under heat and pressure conditions that satisfy the curing conditions of the impregnated resin and the impregnated 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 to 300 μm. If it is less than 50 μm, it is difficult to handle because of insufficient strength and easy wrinkling. Also 300
If it is more than μ, it becomes excessive quality and is not suitable for cost.

As the wood core material, a wood core material such as plywood, a particle boat, or MDF is used as described above. In the present invention, a plate having a thickness of 5 to 20 mm is preferably used.

As the moisture-proof sheet laminated on the back surface, in addition to olefin-based resin sheets such as polyethylene and polypropylene, resin sheets such as polyester resin and acrylic resin, or paper, non-woven fabric, cloth and the like are laminated on these resin sheets. There are composite sheets, metal foils such as aluminum and stainless steel, and those obtained by bonding paper, nonwoven fabric, cloth, and the like to these metal foils. The thickness of the resin sheet, the resin sheet used for the composite sheet, the metal foil, and the like is desirably 0.05 to 1 mm from the viewpoint of moisture-proof performance or cost. When an olefin resin sheet having poor adhesiveness is used as the resin sheet, ozone treatment, ultraviolet irradiation, and the like are performed to secure the adhesiveness during the processing of the moisture-proof sheet or the adhesive processing of the decorative panel. It is desirable to use a resin sheet activated by oxidizing the surface of the resin sheet by a treatment or the like.

[0008] In order to bond the metal decorative sheet, the wood core material, and the moisture-proof sheet to each other, a rubber-based adhesive, a urethane resin-based adhesive, a hot melt-based adhesive and the like, a metal-based decorative sheet, If the moisture-proof sheet has proper adhesion, an aqueous adhesive such as a vinyl acetate resin emulsion, an ethylene / vinyl acetate resin emulsion, or a vinyl acetate / acrylic resin emulsion can be used. For the bonding operation, a known bonding method may be employed for each adhesive.

The shape of the end portion of the wood core material may be a curved surface or another shape in addition to a case perpendicular to the front and back surfaces. Finishing the end of the wood core material is such that the resin edge material is adhered to the end surface of the wood core material, or if the end shape is a curved surface, the metal decorative sheet is continuously wound up to the end surface or the back surface. Glued and finished. ABS for resin edge material
Thermoplastic resins such as resin, vinyl chloride resin, polyester resin, nylon resin, and polyethylene resin are used as raw materials and molded into a tape shape with a thickness of 0.2 to 5 mm. Processing is suitable in view of processing speed, finished appearance, etc.

Next, the present invention will be described in detail with reference to examples and comparative examples.

Example 1 The basis weight of 200 g was applied to the back of a 150 μm thick aluminum sheet which was color-coated with an acrylic resin paint.
/ M2 kraft paper impregnated with a phenolic resin is impregnated with three impregnated sheets, and a metal-based decorative sheet integrated by hot pressing is used as a wood core material.
m, 450 mm wide and bonded to the front and back of a particle board with a rubber adhesive. A 1.0 mm-thick rim-adhering material made of ABS resin was adhered to the periphery of the end with a hot-melt adhesive to prepare a decorative panel of Example 1.

[0011]

Example 2 The same aluminum sheet used in Example 1 was impregnated on a surface of 80 g / m2 decorative paper impregnated with melamine resin on the surface of the same aluminum sheet, and three impregnated sheets on the back were the same as Example 1. Are bonded to the surface of the same particle board as that used in Example 1 with a rubber-based adhesive, and the front and back of a 50μ polyester resin sheet are attached to the back of the particle board. A moisture-proof sheet having paper adhered thereto was adhered with a vinyl acetate resin emulsion adhesive. The end was finished in the same manner as in Example 1 to prepare a decorative panel of Example 2.

Comparative Example 1 The same metal board used in Example 1 was used on the surface of the same particle board as used in Example 1, and the backside was used as Example 2
The impregnated decorative paper used in Example 1 and the three impregnated sheets used in Example 1 were superimposed, and hot-pressed 0.8 mm melamine resin decorative plates were adhered to each other with a rubber-based adhesive. The decorative panel of Comparative Example 1 was prepared similarly.

Comparative Example 2 An aluminum sheet having a thickness of 150 μm was adhered to the surface of the same particle board as used in Example 1 with a rubber-based adhesive, and the same as that used in Example 2 on the back surface of the particle board. The moisture-proof sheet was adhered with a vinyl acetate resin emulsion adhesive. The end was finished in the same manner as in Example 1 to prepare a decorative panel of Comparative Example 2.

The following evaluation tests were conducted on the decorative panels of Examples and Comparative Examples. The results are shown in Table 1.

[Table 1]

Evaluation test Warpage test: Each decorative panel prepared in Examples and Comparative Examples was allowed to stand at a temperature of 20 ° C. and a humidity of 60% for 7 days, and then at 40 ° C. and a humidity of 90% for 7 days. At the time of standing, the maximum distance of the decorative panel away from a line connecting both ends in the direction of 700 mm with a straight line is measured as warpage (mm). Impact resistance test; 100mm height on the surface of each decorative panel
Drop a steel ball with a diameter of 19 mm and a mass of 28.1 g,
The presence or absence of a surface abnormality is determined.

[0016]

[Effect] The decorative panel according to the present invention is a metal-based decorative sheet having a reinforcing layer integrated on the surface of a wooden core material, a moisture-proof sheet laminated on the back surface, and a resin edge material adhered to the ends. Or the metal-based decorative sheet is continuously adhered to the surface and the end of the wood core material, and the moisture-proof sheet is adhered to the back surface, so that any external moisture will not be present inside the wood core material. And the expansion and contraction of the wood core material due to moisture change does not occur. For this reason, warpage as a decorative panel hardly occurs. In addition, the back side of the metal decorative sheet is integrated with a reinforcing layer composed of a thermosetting resin and reinforcing fibers, so that it has excellent strength, and can be dented or damaged even if the article falls and collides. There is no. In addition, fire protection due to the flame shielding effect of the metal sheet can be expected. .

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yasuhito Suzuki 24 Fukami, Kamikatsu, Oji, Jimaji-cho, Kaifu-gun, Aichi Prefecture F term in Aika Kogyo Co., Ltd. 2B002 AA01 AA03 BA01 DA04 2B250 AA01 AA11 AA13 BA05 CA11 DA04 FA28 FA31 GA03 4F100 AB10B AK01B AK01C AP00A BA03 BA10B BA10C CB00 DG01B DG01C DH00B DH00C EC18 GB07 GB08 HB00B JB13B JB13C JD04C JJ07 JK04 JK10 JL04

Claims (2)

[Claims] 1. A decorative panel comprising: a metal decorative sheet having a reinforcing layer integrated on the back surface; and a moisture-proof sheet bonded to the front and back surfaces of a wooden core. 2. The decorative panel according to claim 1, wherein the reinforcing layer is a composite of a thermosetting resin and a fibrous base material.