JPH0821018A - Heat insulation structure of wall panel and manufacture therefor - Google Patents

Abstract

PURPOSE:To facilitate manufacture of a wall panel having a heat insulating structure by spraying urethane foam having self-adhesive property to the back side of a wall panel, and depositing a film simultaneously with foaming hardening. CONSTITUTION:A wall panel 4 about 2-3mm thick is press-formed using a unsaturated polyester resin material, the back side of the panel is reinforced by a reinforcing rib 5, and an aluminum deposit film 7 is placed on one end side by adhesion through a pressure sensitive adhesive double coated tape. Subsequently, the deposit film 7 of the back side of the wall panel is lifted up, urethane foam resin 8 is sprayed, and the surface of the wall panel is coated with the aluminum deposit film 7 in an unhardened state. Whereupon, with the progress of foaming hardening, both the resin and the film are made integrally adhere to each other by its self-adhesive property, so that a heat insulating layer 9 is formed by the hard urethane foam resin 8. The surface of the heat insulating layer 9 is coated with the aluminum deposit film 7 to restrain emission of radiation heat and improve the heat insulating effect furthermore.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enhances heat retention by providing a heat insulating layer of urethane foam resin on the back side of a wall panel used particularly in a cold region and covering the front side with a film. The present invention relates to a heat retaining structure for a wall panel and a manufacturing method of the wall panel, which are improved in appearance and appearance.

[0002]

2. Description of the Related Art Conventionally, there is a wall panel having a heat retaining function as shown in FIG. The wall panel 1 has a heat insulating layer 2 formed by blowing urethane foam resin on the back surface thereof to foam and cure the resin. Further, in the related art, there is one in which styrofoam is attached in a block shape on the back surface side of the wall panel to form a heat insulating layer.

[0003]

Therefore, in the wall panel 1 forming the heat insulating layer 2 made of the urethane foam resin, the urethane foam resin itself is pulverized by the reaction with ultraviolet rays or oxygen in the air. However, since the surface is uneven and yellow, and dust is accumulated on the uneven surface, the appearance of the product using this is poor.

In particular, when the wall panel 1 is used for the unit bath 3 shown in FIG. 3, in a cold district such as Hokkaido, the unit bath 3 is shipped in a state where it is assembled in advance at a factory, and the unit bath 3 is shipped to a vacant lot on site. Often brought in and set aside. The surface side of the wall panel 1 of the unit bath 3 faces the room, and the heat insulating layer 2 on the back surface of the panel faces the outer surface of the unit bath 3.

Therefore, the heat insulating layer 2 made of urethane foam resin on the back side of the wall panel 1 is exposed on the back side and is exposed to the public's eyes, so that there is a problem that the appearance is not good and the commercial value is lowered. .

On the other hand, in the conventional technique in which the polystyrene foam is adhered to the back surface of the wall panel in a block shape, a gap is easily formed between the wall panel and the polystyrene foam, and the heat retaining property is lost accordingly. There was a flaw. Further, since the styrofoam is divided and adhered to each block, there is a drawback that the appearance after adhesion is deteriorated.

Further, when ribs as shown in FIG. 2 are formed on the back surface side of the wall panel, the ribs must be attached while avoiding the ribs, and the work of cutting the Styrofoam plate according to its size. Was necessary and tedious. Moreover, in this case, there is a drawback that the number of used polystyrene foam is increased, and furthermore, the cut polystyrene foam must be individually attached to the back surface side of the wall panel.

[0008]

SUMMARY OF THE INVENTION The present invention has been made by improving and removing the conventional problems in view of the above-mentioned problems, and has a heat insulating structure for a wall panel which has a good heat insulating property and a good appearance on the rear surface side, and a manufacturing method thereof. Is intended to be provided.

In order to solve the above-mentioned problems, the heat insulation structure of the wall panel adopted by the present invention is such that a foam heat insulating layer made of urethane is formed on the back surface of the wall panel, and a film is attached to the back surface of the foam heat insulating layer. It is characterized by being attached.

Further, in the method for manufacturing a wall panel adopted by the present invention, a urethane foam resin is sprayed on the back surface of the wall panel, and a film is placed on the upper surface of the urethane foam resin in an uncured state to foam the urethane foam resin. It is characterized in that the film is integrally bonded by the self-adhesiveness of the urethane foam resin as it is cured.

[0011]

According to the heat retaining structure of the wall panel of the present invention, a heat insulating layer made of urethane foam resin is formed on the back side of the wall panel, and a film is attached to the front side of the heat insulating layer. This film is, for example, a color film or an aluminum vapor-deposited film, and since it covers the exposure of the urethane foam resin to the surface, it has a good appearance. Further, in the case of an aluminum vapor-deposited film, it has a function of preventing radiant heat from dissipating, and an excellent heat retaining property is obtained in combination with the heat insulating effect of the urethane foam resin.

In the wall panel manufacturing method of the present invention,
Spray the urethane foam resin on the back side of the wall panel, place the film on the front side of the urethane foam resin with the uncured self-adhesive property, and bond the film at the same time as the foam cure. There is. Therefore, a separate work such as attaching a film is unnecessary. It is possible to conceal the urethane foam resin very easily.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The wall panel heat retaining structure and wall panel manufacturing method of the present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1A to FIG. 1B
[Fig. 3] is a vertical sectional view showing a manufacturing process of the wall panel 4 according to an embodiment of the present invention.

In this embodiment, first, as shown in FIG. 1A, an unsaturated polyester resin molding material (also referred to as a sheet molding compound (SMC)) is press-molded to have a thickness of 2 to 3 mm. The wall panel 4 is molded. The wall panel 4 is provided with reinforcing ribs 5 on the back side thereof. Then, one end side of the aluminum vapor deposition film 7 is adhered to one end side of the back surface side of the wall panel 4 via the double-sided tape 6.

Next, as shown in FIG. 3B, a hard urethane foam resin 8 is sprayed onto the back surface of the wall panel 4. The urethane foam resin is a two-liquid mixed type consisting of liquid I and liquid R, and liquid I is a crude aromatic isocyanate (M
The liquid R is a mixture of a polyol, a catalyst (organic metal compound), a foam stabilizer (silicon sponge activator), a foaming agent (Freon 1I), and a combustion inhibitor.

After the spraying of the urethane foam resin 8 is completed, as shown in FIG. 3C, the urethane foam resin 8 is uncured, and the urethane foam resin 8 is held by holding the free end side of the aluminum vapor deposition film 7. Cover the front side of. Then, the urethane foam resin 8 and the aluminum vapor deposition film 7 are brought into contact with each other by lightly pressing them with a hand or the like.

In this state, the urethane foam resin 8 has self-adhesiveness. Therefore, urethane foam resin 8
At the same time as the foam hardening progresses, the aluminum vapor deposition film 7 is integrally bonded due to its self-adhesiveness. Therefore, the work for separately bonding the aluminum vapor deposition film 7 is unnecessary.

FIG. 1D shows a state in which foaming and hardening of the urethane foam resin 8 is completed. Upon completion of the foaming and hardening, a heat insulating layer 9 made of hard urethane resin 8 is formed on the back surface side of the wall panel 4, and the heat insulating layer 9 is covered with the aluminum vapor deposition film 7 on the front surface side.

As described above, in this embodiment, since the hard urethane foam resin 8 is sprayed on the back surface of the wall panel 4 to foam and harden the heat insulation layer 9, the heat insulation layer 9 is provided. It adheres to the back surface side of No. 4 and no gap is generated. Therefore, the heat insulating effect is not lost by the gap.

Further, since the surface of the heat insulating layer 9 is integrally covered with the aluminum vapor deposition film 7, the radiant heat passing through the heat insulating layer 9 from the indoor side of the wall panel 4 is reflected by the aluminum vapor deposition film 7 and the radiant heat is radiated. As a result, the heat insulation effect is excellent.

Further, since the aluminum vapor-deposited film 7 conceals the heat insulating layer 9, dust or the like does not accumulate on the surface irregularities of the heat insulating layer 9 and is not touched by the human eye, so that it has a good appearance.

Incidentally, the present invention is not limited to the above-described embodiment, but can be appropriately changed. For example, the aluminum vapor deposition film 7 may be a color film. In this case, although there is an effect that the heat insulating layer 9 is concealed and the appearance is improved, the effect of preventing the radiation heat from radiating from the indoor side cannot be expected.

[0023]

As described above, in the heat insulating structure of the wall panel of the present invention, the heat insulating layer made of the urethane foam resin is formed on the back surface side of the wall panel, and the film is attached on the front surface side. Since the heat insulating layer made of urethane foam resin is hidden from being exposed to the surface, the appearance is good. When the film is an aluminum vapor-deposited film, it has a function of preventing radiant heat from dissipating, and in combination with the heat insulating effect of the urethane foam resin, excellent heat retention can be obtained.

On the other hand, in the method for manufacturing a wall panel of the present invention, a urethane foam resin is sprayed on the back surface side of the wall panel, and the urethane foam resin is uncured and has a self-adhesive surface. Since the film is placed on the side and the film is adhered at the same time as the foam hardening, there is no need to separately attach the film, and it is possible to conceal the heat insulation layer with the urethane foam resin very easily. .

[Brief description of drawings]

1A to 1D are vertical cross-sectional views showing a manufacturing process of a wall panel according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a conventional wall panel.

FIG. 3 is a partial sectional perspective view showing an entire unit bath using a conventional wall panel.

[Explanation of symbols]

4 ... Wall panel 7 ... Aluminum vapor deposition film 8 ... Hard urethane foam resin 9 ... Thermal insulation layer

Claims (4)

[Claims] 1. A heat retaining structure for a wall panel, wherein a foamed heat insulating layer made of urethane is formed on the back surface of the wall panel, and a film is attached to the back surface of the foamed heat insulating layer. 2. The heat retaining structure for a wall panel according to claim 1, wherein the film is an aluminum vapor deposition film. 3. A urethane foam resin is sprayed onto the back surface of a wall panel, and a film is placed on the upper surface of the urethane foam resin in an uncured state, and the urethane foam resin self-adhesiveness is accompanied by foam hardening of the urethane foam resin. The method for manufacturing a wall panel is characterized in that the film is integrally bonded by the method. 4. The method for manufacturing a wall panel according to claim 3, wherein the film is an aluminum vapor deposition film.