JP2000279234A - Painted top plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a necessary hardness on the surface of a top plate according to the composition of a coating material by arranging a steel plate on the upper surface of a top plate body, forming a paint film on the upper surface of the steel plate, and forming the paint film so as to have bubbles in the inner part. SOLUTION: The top plate body 2 of a painted top plate 1 has a sandwich structure consisting of a core material 22 such as paper honeycomb core and steel plates 21 and 23 laid along vertical both sides thereof, and a paint film 2 having a double layer structure consisting of a bed layer 31 and a surface layer 32 is formed on the steel plate 21 formed on the upper surface of the top plate body 2. As the bed layer 31 of the paint film 3, a coating material consisting of 30% of epoxy resin, 30% of polyester resin, 2% of additive, 8% of temperature retaining agent and 30% of pigment is used. The temperature retaining agent of the components is foamed by heating to form bubbles 3x. According to this, a necessary hardness can be ensured in the surface of the top plate 1 according to the composition of the coating material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a painted top plate which can be suitably used as a component such as a desk or a table.

[0002]

2. Description of the Related Art At the time of constructing a desk or other furniture with a top plate, at least a surface hardness having no practical problem and a function of alleviating a cold tactile sensation through an elbow or the like in desk work or the like are provided as functions of the top plate. Required. Therefore,
This type of top plate is generally made of a top plate body using a steel plate or the like, and a melamine decorative plate is attached to the surface of this top plate body,
It is customary to achieve the required surface hardness and good tactile sensation.

[0003]

However, with such a construction, the bonding of the melamine decorative board involves a large number of manufacturing steps and also involves a poor yield due to a defective process. In addition, steel plates and melamine decorative plates, which are usually bonded with a solvent-based adhesive and are difficult to peel off, must be discarded separately, so costs are high at the time of disposal, and this type of adhesive causes environmental pollution There are various problems that fear is high.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention forms a coating film as an alternative to a melamine decorative plate simply by applying a coating to a steel plate, thereby providing a required hardness. In addition to satisfying good tactile feeling at the same time,
It is an object of the present invention to provide a painted top plate which does not become harmful even if the steel sheet is discarded with a coating film attached thereto.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS For this purpose, a painted top plate of the present invention comprises a top plate body having a steel plate disposed on an upper surface thereof, and a coating film formed on an upper surface of the steel plate. Membrane
It is characterized by having bubbles inside. With such a configuration, by appropriately combining the composition of the paint for forming the coating film, the surface hardness required for the surface of the coating top plate can be exhibited, and the coating film has Since the bubbles suppress the thermal conductivity and slow the escape of the heat flux from the body surface, a cold feeling of contact can be eliminated at the same time. Furthermore, since the steel plate is simply painted, the number of processes is small and the occurrence of process defects is suppressed.In addition, there is no need to separate and discard melamine decorative plates and steel plates, and a solvent-based adhesive is used. Environmental pollution can also be avoided.

As a specific embodiment, a part of a paint constituting a coating film contains a foaming element which foams by applying heat to form air bubbles. In order to more preferably achieve both surface hardness and good tactile sensation, the coating film has an underlayer and a surface layer thereon, and the underlayer contains bubbles. It is preferable that the underlayer and the surface layer are respectively baked.

[0007] Specific examples of the foaming element include those using a heat insulating agent. Even if you do not use a melamine veneer, you can attach a soundproofing material to the top plate or attach a top plate body to effectively prevent the soundproofing function from dropping when you hit the top plate. It is effective to have a sandwich structure in which steel sheets are attached to the upper and lower surfaces of the paper honeycomb core.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a painted top plate 1 used as a component such as a desk, and FIG. 2 is a partially enlarged view thereof. As shown in these drawings, the painted top plate 1 includes a top plate main body 2 having at least an upper surface provided with a steel plate 21, and a coating film 3 formed on the upper surface of the steel plate 21.
The coating film 3 has bubbles 3x inside.

More specifically, the top plate body 2 has a structure in which steel plates 21 and 23 are sandwiched on both upper and lower surfaces of a core material 22 such as a paper honeycomb core, and has a light weight and strength. It has the same soundproofing function as a melamine decorative board. The coating film 3 is formed by powder coating, and specifically has a two-layer structure of a base layer 31 and a surface layer 32. In this embodiment, as shown in FIG.
0%, polyester resin 30%, additive 2%, heat insulator 8
% And 30% by weight of pigment (titanium oxide) are used. An extender or the like may be added to the pigment as needed. Thus, the heat retaining agent contained in the component functions as a foaming element that foams by applying heat to form the bubbles 3x. Specifically, this heat insulating agent is composed of a number of small capsules, and in this embodiment, after forming the underlayer 31 of about 150 μm, a baking treatment is performed at 180 ° C. for 15 minutes to form a capsule. Are foamed into closed cells or open cells. The surface layer 3
No. 2 is obtained by applying an epoxy polyester design paint (e.g., embossed paint) on the underlayer 31 to a thickness of about 70 μm and then baking it at 180 ° C. for 15 minutes to dry and harden the whole. It is. In this embodiment,
As the design paint, "CONAC N" manufactured by NOF Corporation
o. 2750 ", and the composition is as shown in FIG.

FIG. 4B shows the results of a thermal conductivity comparison test performed on the painted top plate 1 of the present embodiment. In this test, a change with time of heat diffusion from a top plate sample was measured using a thermocouple. As a comparative example, FIG.
In the figures, A and C are conventional top plates using a melamine decorative plate having a thickness of 0.8 mm, respectively, and a coating top obtained by simply applying a single layer of a paint composed of the same components as those used for the underlayer 31 (see FIG. 3). It is each test result of a board | plate, Furthermore, in the figure, D is an area | region where the data at the time of applying various other coatings to a top board are collected. As is clear from these test results, the coated top plate 1 of the present embodiment can exhibit the heat insulation property closest to the conventional top plate made of a melamine decorative plate as compared with other top plates, Next, it was confirmed that the coated top plate was obtained by merely applying a paint containing a foaming element as a good form.

FIG. 6 shows a so-called pencil hardness test for checking whether the surface of the painted top plate 1 (the upper surface of the surface layer 32) has the strength to withstand the direct writing with a pencil of general hardness. The results of tests performed on various other characteristics are shown, and it is clear that the coated top plate 1 of the present example is comparable to the melamine decorative top plate in these characteristics. became.

As described above, the painted top plate 1 of the present embodiment is
By appropriately combining the compositions of the design paints forming the coating film 3, the surface hardness required for the surface of the coating top plate 1 can be exerted, and the bubbles 3x contained in the coating film 3 are thermally conductive. Since the escape of the heat flux from the body surface to the coating top plate 1 is slowed down by suppressing the property, the cold tactile feeling when the hand or the elbow touches the coating top plate 1 can be eliminated at the same time. In this embodiment, the hardness can be freely adjusted by the mixing ratio of the polyester resin, and the design appearance such as the color can be adjusted by the kind and the mixing ratio of the pigment. Furthermore, since the steel plate 21 is simply coated, there is no need to separate and discard the material as in the case of a melamine decorative plate and a steel plate, and the problem of environmental pollution can be effectively solved because no solvent-based adhesive is used. .

In particular, a part of the paint constituting the coating film 3 includes:
Since a foaming element (heat insulating agent) that foams by application of heat to form the bubbles 3x is contained, the coated top plate 1 can be easily manufactured through a simple manufacturing process, and the heating time and the heating temperature can be increased. Adjust the expansion ratio etc. depending on the setting of
It is possible to easily pursue the coated top plate 1 having desired characteristics other than the above-described embodiment.

The coating film 3 comprises an underlayer 31 and a surface layer 32.
Wherein the base layer 31 has bubbles 3x therein, and the base layer 31 and the surface layer 32 are each baked. Therefore, good tactile sensation through the heat transfer blocking action of the underlayer 31 and hardness of the surface layer 32 can be ensured to such an extent that the surface layer 32 can be directly written, and in addition, design aesthetics can be more preferably achieved. . In particular, as an additional factor that the present embodiment obtains the above-mentioned good tactile sensation, the effect of blocking the heat transfer at the boundary between the underlayer 31 and the surface layer 32 is performed. Is considered that the combination of the composition constituting the above and the design paint constituting the surface layer 32 enhances the heat blocking characteristics at the boundary. In particular, when the design paint is an embossed paint, it is considered that the unevenness of the surface can reduce the contact area when a hand or the like is touched, thereby further improving the tactile sensation.

Further, since the coating is performed by powder coating, the coating film 3 can be formed easily and properly, and there is no risk of environmental destruction because no solvent is used as compared with electrostatic coating. In addition, the film thickness can be easily controlled. In addition, since the top plate body 2 has a sandwich structure in which steel plates 21 and 23 are attached to both upper and lower surfaces of a core material 22 such as a paper honeycomb core, the top plate surface can be used without employing a melamine decorative plate. It is possible to effectively prevent the soundproof function from lowering, such as making a cheap sound when hit.

The specific configuration of each section is not limited to the illustrated embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0017]

The present invention is embodied in the form described above and has the following effects. That is, the painted top plate of the present invention has a coating film formed on the upper surface of the steel plate constituting the top plate main body, and has a bubble inside the coating film. For this reason, the required hardness can be secured on the top plate surface according to the composition of the paint, and the cold tactile sensation can be eliminated at the same time due to the heat blocking effect of the bubbles in the paint film. Furthermore, since the steel sheet is simply painted, the number of processes and process defects can be reduced, and the disposal of the steel sheet with the coating film attached will not cause any environmental problems when discarded. Can be.

When a part of the paint constituting the paint film contains a heat-foamable element, a paint top plate can be made through a simple manufacturing process, and various kinds of paints can be formed depending on the heating time and heating temperature. Pursuit of the top plate characteristics can also be easily performed.
Further, if the coating film is composed of a base layer and a surface layer, and the base layer contains bubbles, it is possible to preferably achieve both good contact properties and required surface hardness. In this case, if the baking treatment is applied to both the underlayer and the surface layer, the effect can be made more remarkable.

Furthermore, if a heat insulating agent is used for the foaming element,
The present invention can be suitably implemented using a material that is readily available. In addition, if the top plate body has a paper honeycomb structure, the soundproofing function can be effectively enhanced without using a melamine decorative board.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a painted top plate according to one embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG. 1;

FIG. 3 is a view showing a composition of a paint used for forming a base layer of the painted top plate according to the embodiment.

FIG. 4 is a graph showing the results of testing the thermal conduction characteristics of the coated top plate according to the example, in comparison with those of other top plates.

FIG. 5 is a view showing the composition of a coating material used for coating a foamed single-layer top panel which is a comparative example of the embodiment.

FIG. 6 is a view showing other various characteristics of the painted top plate according to the example in comparison with those of other top plates.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Painted top plate 2 ... Top plate main body 3 ... Painted film 3x ... Bubbles 21 ... Steel plate 31 ... Underlayer 32 ... Surface layer

Claims (6)

[Claims] 1. A top plate body having a steel plate disposed on an upper surface thereof, and a coating film formed on an upper surface of the steel plate, wherein the coating film has air bubbles therein. Features a painted top plate. 2. The painted top plate according to claim 1, wherein a part of the paint constituting the paint film contains a foaming element which foams by applying heat to form air bubbles. 3. The coated top plate according to claim 1, wherein the coating film includes a base layer and a surface layer thereon, and the base layer contains bubbles. 4. The coated top plate according to claim 1, wherein the underlayer and the surface layer are each baked. 5. A coated top plate according to claim 1, wherein a heat insulating agent is used for the foaming element. 6. The coated ceiling according to claim 1, wherein the top plate body has a sandwich structure in which steel sheets are attached to upper and lower surfaces of a paper honeycomb core. Board.