JPH0681342U - Makeup panel - Google Patents

Abstract

(57) [Abstract] [Purpose] A paper core is used as a core material, front plates are attached to both surfaces of the core material, and the edge material is formed by casting a thermosetting resin. We will maintain the strength of the panel, reduce the weight and reduce the price. [Structure] Adhesive 3 is provided on both sides of a paper core which is the core material 1.
The front panel 2 is pasted through the sheet and cut into a desired size, and then the edge member 4 is formed at the mouth end portion by casting a thermosetting resin to form the decorative panel 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a method of manufacturing a decorative panel used for a top plate of furniture, housing equipment, office equipment and the like, a member such as a door.

[0002]

[Prior art]

 Conventionally, when a paper core is used as a core material and a front plate is attached to both surfaces of the core material, a frame material mainly made of wood material that forms the outer periphery of the core material is created and surrounded by the frame material. After filling the space with a paper core having the same thickness as the frame material as a reinforcing material, a surface plate such as a decorative plate is attached using an adhesive and the frame material is cut to form the edge material. how to.

Alternatively, a casting mold is installed at the mouth of the frame and a front plate, and a thermosetting resin such as a polyurethane resin is cast, or a rim material such as a cosmetic sheet is placed at the mouth of the mouth. There was a method of pasting.

[0004]

[Problems to be solved by the device]

 However, in a decorative panel in which a frame material is assembled to form an outer peripheral portion of a core material, a space surrounded by the frame material is filled with a paper core, and a front plate is attached to both surfaces, Assembling and processing required material and labor, and the price of the frame material accounted for a considerable proportion of the product price of the decorative panel, which was a cause of cost increase. Further, the use of the frame material increases the weight of the decorative panel, which is not advantageous in handling, transportation, and workability.

According to the present invention, a paper core is used as a core material without using a frame material forming the outer periphery of the core material, a front plate is attached to both surfaces of the core material, and the edge material is thermosetting. The purpose is to maintain the strength of the decorative panel, reduce the weight, and reduce the price by being molded by resin casting.

[0006]

[Means for Solving the Problems]

 According to the present invention, a paper core is used as a core material, a front plate is attached to both surfaces of the core material with an adhesive agent, and at least one surface of a wood mouth portion is an edge material formed by casting a thermosetting resin. It is a decorative panel characterized by being composed of, and a melamine decorative plate on at least one side of the front plate laminated on both sides of the core material, which makes use of characteristics such as designability, strength, and weight reduction. Is obtained.

The paper core used in the core material of the decorative panel of the present invention is formed by stacking paper such as kraft paper with an adhesive and stacking a large number of continuous hexagons, circles, and scalene polygons. A hole-shaped one, a honeycomb-shaped one, a continuous S-shaped one, a continuous one-step ball, a continuous rib in parallel, a continuous one in a folded shape, etc. are used. When water resistance and compressive strength are required, a core reinforced by impregnating these paper cores with phenol resin or the like is used.

Both sides of the core to be the core material are adhered to the front plate with an adhesive, and as the adhesive, a urea resin adhesive, a vinyl acetate resin adhesive, an aqueous vinyl urethane resin adhesive are used. An agent or the like is used.

According to the present invention, an edge material is formed by casting a thermosetting resin in the wood mouth portion without using a frame material forming the outer periphery of the core material, and the thermosetting resin covers the wood mouth surface. The cut-out cells of the constituent paper cores are filled and adhered to the front plate and support the front plate, strengthening the mouth of the decorative panel and integrating the decorative panel with the edge material. Therefore, the strength can be improved. Further, since the front plate is reinforced by the cells of the paper core, when a melamine decorative plate is used as the front plate, it is not necessary to combine it with plywood or the like, and the decorative plate can be used alone.

Polyurethane resin, epoxy resin, unsaturated polyester resin, etc. can be used as the thermosetting resin for molding for molding the edge material, but polyurethane resin is RIM molding (reaction injection molding). ), The resin flows well in the mold, and molding can be performed at low temperature and in a short time, and by changing the components and blending ratio, elastic materials, softness, hardness, etc. can be obtained. You can

[0011]

【Example】

Example 1 Hereinafter, description will be given with reference to the drawings. FIG. 1 is a sectional view of an office desk top plate which is one example of the decorative panel 5 of the present invention. The paper core which is the core material 1 has two types of performance specified in JIS A6931. And a core having a stepped ball shape. This step-ball shaped paper core has a cell size of 5 mm and a compressive strength of 5 kgf / cm ² .

As the front plate 2, a 1.6 mm thick melamine decorative plate is attached to the front side of the office desk top plate, and a 1.6 mm thick phenol resin is attached to the back side. The impregnated craft paper laminate is laminated. When the core material 1, the melamine decorative board which is the front board 2, and the phenol resin-impregnated laminated board are stuck together, as the adhesive 3, 30 parts by weight of the urea resin adhesive and 70 parts by weight of the vinyl acetate emulsion adhesive are used. Part, and 1 part by weight of ammonium chloride are applied to a melamine decorative board and a phenol resin-impregnated laminated board at a coating amount of 120 g / m ² on the back surface of each, and the core material 1 is laminated so as to sandwich it. Then, a flat plate press was left for 3 hours under a pressure of 0.5 kgf / cm ² for adhesion.

After the core material 1 and the front plate 2 are bonded together, the end portions are cut into a panel having a predetermined size, and a thermosetting resin is used by using a casting mold made of epoxy resin. Was cast. A casting mold made of epoxy resin is composed of an upper mold and a lower mold.After applying a wax-based mold release agent, a panel is placed at a predetermined position in the lower mold and clamped by the upper mold. The edge member 4 is formed by injection molding an elastic type polyurethane resin. The surface of the edging member 4 is a curved surface, and a mold surface is formed so as to have an embossed finish like a leather surface. Keep the temperature during casting to about 40 ° C.

For casting the edging material 4, as a raw material of the elastic type polyurethane resin, a polyether type polyol containing 3% by weight of an inorganic pigment and 4-4 ′ diphenylmethane diisocyanate prepolymer are used. These raw materials are stored in separate stock solution tanks at a temperature of 20 ° C. under a N ₂ gas atmosphere. The mixing ratio of the polyether type polyol and 4-4 'diphenylmethane diisocyanate prepolymer is 100 parts by weight of the polyether type polyol and 30 parts by weight of 4-4' diphenylmethane diisocyanate prepolymer. Adjust the discharge rate of the pump so that This elastic type polyurethane resin raw material composition is mixed with a static mixer, pressure-injected from the injection port of the mold with an injection pressure of 3 kgf / cm ² , closed and left for 3 minutes to cure, and then the mold is opened. Then, the decorative panel 5 on which the edge material 4 was formed was taken out, and the gate cutting and deburring were performed to obtain an office desk top plate.

In this veneer panel for an office desk, the injected polyurethane resin is filled in the incised cell portion of the mouth of the paper core, and the melamine decorative sheet and the phenol resin as the front panel 2 are filled. The decorative panel and the edging 4 are integrated while adhering to the kraft paper laminated plate to reinforce the opening.

In the thus obtained office desk top plate, since the edge material 4 is integrated with the decorative panel, there is no gap at the seam and the finish is beautiful, and the edge material 4 is an elastic type polyurethane resin. It had a soft touch feeling.

The impact strength of this office desk top plate was examined by the following method. A 18 mm thick concrete fiberboard, which is larger than the test piece, is placed on a horizontal concrete floor, and the office desk top board, which is the test piece, is placed on top of it, with the melamine decorative board facing up. Then, a steel ball having a mass of 1045 g was freely dropped from the fall distances of 30 cm, 50 cm, and 100 cm to almost the center of the test piece, and the presence or absence of cracks or dents was visually checked. The drop distance was the distance from the lower surface of the steel ball to the upper surface of the test piece. As a result of the test, cracking occurred at a fall distance of 100 cm, but no abnormality was observed at 30 cm and 50 cm.

[0018]

[Effect of device]

 Since the front plates are attached to both sides of the paper core core and the wood opening is formed by casting thermosetting resin, it is not necessary to use a core material with a frame material made of wood material, etc. Materials and processes for making the material are omitted. Therefore, the weight can be remarkably reduced as compared with the case of using the core material with the frame material.

Since the front plate is reinforced by the paper core from the back side, when a melamine decorative plate is used as the front plate, it is possible to configure the decorative plate as a single unit without laminating plywood etc. become. In addition, the thermosetting resin cast on the wood mouth surface adheres to the front plate filled in the cut cell portion of the paper core to reinforce the structure, so that even without using a frame material, The strength of the decorative panel can be maintained.

Further, since the decorative panel and the edging material are integrally formed by casting, step joints and gaps at seams are eliminated and the design is improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of the structure of a decorative panel of the present invention.

[Explanation of symbols]

 1 Core material 2 Surface plate 3 Adhesive 4 Edge material 5 Decorative panel

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B32B 27/42 7016-4F

Claims (2)

[Scope of utility model registration request] 1. A paper core is used as a core material, and a front plate is attached to both surfaces of the core material with an adhesive, and at least one surface of the wood mouth portion is formed by casting a thermosetting resin. A decorative panel characterized by being composed of edge materials. 2. The decorative panel according to claim 1, wherein at least one surface of the front plate laminated on both surfaces of the core material is a melamine decorative plate.