JPH1122140A - Building panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make sealing work easier by forming a resin film consisting of a fluorine-based resin film on the exterior surface of a panel main body made of a metal and forming part of this resin film to a building panel processed with sealing. SOLUTION: On the exterior side surface of a panel main body 1 made of a metal such as aluminum or stainless steel, a resin film 2 made of a fluorine- based resin or the like and a building panel is formed. And a part or the whole of a portion 2a to be sealing processed with the resin film 2 has a surface tension of 35 dyne/cm or more, which is 5 dyne/cm higher or more than the portion 2b which will not be sealing processed. Then, to give the surface tension to a part or the whole of the portion to be sealing processed, electric discharge treatment is given in advance to this portion. Thus, the adhesion with the sealing material can be improved considerably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building panel used for the inside and outside walls of a building.

[0002]

2. Description of the Related Art Architectural panels used on the inner and outer walls of a building are made of metal such as fluororesin on the outer surface of a metal panel body in order to impart weather resistance and non-staining properties. Forming a resin coating has been performed. In this building panel, when assembling it to form the inner and outer walls, a sealing material is applied to the gap between them. However, if a fluororesin coating film is formed on the surface, the adhesiveness of the sealing material Therefore, blasting is performed on a portion of the coating film to be sealed.

[0003] However, the blasting process is troublesome and cannot provide a sufficient adhesive force, and a countermeasure has been desired.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a building panel which has excellent adhesiveness to a sealing material and can easily perform sealing work.

[0005]

Means for Solving the Problems The present inventor has conducted intensive studies in order to achieve the above-mentioned object, and as a result, has found that the surface tension of the portion of the resin coating film formed on the outer surface of the panel body to be sealed is reduced. The resin coating is a poorly-adhesive resin coating such as a fluorine-based resin by increasing the surface tension of 35 dyne / cm or more by electric discharge processing or the like and 5 dyne / cm or more than the surface tension of the part that is not sealed. The present invention also showed excellent adhesiveness to the sealing material, and found that the sealing work was easily performed, and completed the present invention.

That is, the present invention provides the following building panels. Claim 1: A resin coating film is formed on the outer surface of the panel main body, and in a building panel in which a part of the resin coating film is subjected to sealing, at least a part of the surface of the coating film to be sealed has a surface tension of: An architectural panel having a surface tension of 35 dyne / cm or more and 5 dyne / cm or more larger than the surface tension of a part or all of the unsealed portion of the coating film. Claim 2: The building panel according to claim 1, wherein the resin coating contains a fluororesin. Claim 3: The building panel according to claim 1 or 2, wherein the panel body is made of metal. Claim 4: A portion of the coating film to be subjected to sealing processing is subjected to electric discharge processing to have a surface tension of 35 dyne / cm or more, and 5 dyne to a surface tension of a portion not subjected to electric discharge processing.
The building panel according to claim 1, 2 or 3, wherein the height of the building panel is higher than / cm.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail. As shown in FIG. 1, a building panel according to the present invention comprises a panel body 1 having a resin coating 2 formed on an outer surface thereof. It is. In this case, the panel body is usually formed of a metal such as aluminum or stainless steel, but is not limited thereto. Further, as the resin coating film, for example, a coating film of a fluorine-based resin such as polyvinylidene fluoride / organosol paint, an acrylic electrodeposition coating film, or the like,
In the present invention, the present invention is particularly effective for hardly adherent resin coating films such as fluorine resin coating films.

In the present invention, the surface tension of part or all of the portion 2a of the resin coating 2 to be sealed is 35 dyne / cm or more, and more than 5 dyne / cm from the surface tension of the portion 2b not sealed. It is characterized by being expensive.

In this case, the portion 2a to be sealed is processed.
In order to make a part or the whole of the surface tension as described above, it is recommended to use a method in which a sealing material applied portion of a coating film is subjected to an electric discharge treatment before manufacturing a building panel.

As the discharge treatment, a corona treatment, a plasma treatment, a treatment for blowing a corona discharge or an arc discharge by a gas flow, and a plasma torch treatment are preferable.

Here, as the corona treatment, a method in which a discharge is generated between the electrode and the facing electrode by a high-frequency high voltage and the discharge treatment is performed by passing the panel through the discharge space can be adopted. Alternatively, when the panel main body is a conductor such as a metal, the surface to be processed can be modified by causing a discharge between the electrode and the panel using the panel main body itself as a facing electrode. In this case, the discharge condition is usually
Output is 10 to 1000 W, processing time is 0.1 to 30 sec
c.

In the plasma treatment, the surface of the panel is modified by utilizing ions, electrons, radicals, light, atoms, molecules and the like in the plasma, and the gas is treated at a predetermined pressure (low pressure or atmospheric pressure). A method in which a discharge is generated by a DC or AC electric field, and a panel is disposed during the discharge or downstream of the gas flow from the discharge to perform a discharge treatment. In this case, the discharge conditions are usually such that the pressure is 0.001 to
1000 Torr, plasma excitation electric field frequency is DC,
A constant frequency alternating current of 50 Hz or the like, an alternating current of about 1 to 100 kHz, a radio wave of 13.56 MHz or the like, a microwave of 2.45 GHz or the like can be used. As the gas, argon (Ar) gas, oxygen gas, air, nitrogen, helium (H
e) Gas, CF ₄ or the like is used.

As a process for blowing corona discharge or arc discharge by a gas flow, a corona discharge or arc discharge is generated between the electrodes, a gas flow such as air is blown, and the panel is applied to the discharge blown downstream. A discharge treatment method is employed. In this case, the discharge conditions are preferably such that the discharge outlet and the work surface of the panel are normally separated by 1 to 100 mm, and the processing time is preferably about 1 to 30 sec.

As the plasma torch treatment, a method in which a plasma discharge is generated at atmospheric pressure or the like, gas is blown, and a discharge treatment is performed by applying a panel to the discharge blown to the downstream side can be adopted. In this case, the discharge conditions are generally helium gas, argon gas or the like as the gas, and the pressure is 500 to
2000 Torr, frequency is 50Hz-100MHz,
The processing time is about 1 to 30 seconds.

At the time of performing such a process, a portion where the sealing material is not sealed may be protected by a masking tape or the like so as not to be processed. In this case, even if contamination occurs due to protrusion of the sealing material at the time of applying the sealing material, what has adhered to the portion where the sealing material is not applied can be peeled off relatively easily. The protection of the masking tape or the like may be used as it is when the sealing material is applied.

After the above-mentioned electric discharge treatment, it is preferable that the surface tension is maintained at the time of panel construction, for example, by sticking a protective film to a portion of the coating film subjected to the electric discharge treatment. is there.

In this case, a perforation or the like may be formed in the protective film, and only the protective film in the portion where the sealing material is applied may be removed while leaving the protective film in the portion where no sealing material is applied. With the perforations or the like, it is possible to identify the portion that has been adhered to the base, and it is also possible to use the remaining part of the protective film where the sealing material is not applied as masking when applying the sealing material.

The building panel of the present invention can be constructed in accordance with a conventional method to form inner and outer walls. At this time, since the surface of the coating film to be sealed has the above-mentioned surface tension characteristics, it can be used at a building site. Since the sealing material 3 is directly applied to provide excellent adhesiveness without performing blasting treatment, electric discharge treatment, and the like, the man-hour and time required for the sealing application can be reduced. In this case, when performing sealing, it is possible to use a primer or to perform the discharge treatment again on the coating film portion to be sealed at the building site.

Next, an experimental example will be described. [Experimental example] The shape as shown in FIG.
(cm, height: 3 cm) One side surface of a metal panel (Kyner high-temperature baked steel panel) on which a fluororesin coating was formed on the surface was subjected to the following treatment.

(A) Untreated: surface tension of resin coating 34d
yne / cm (B) Corona treatment (output: 100 W, processing speed: 1.0
m / min; HV05-2 manufactured by TANTEC: surface tension of the treated part 48 dyne / cm (C) arc discharge blowing type discharge treatment (3D treater manufactured by RL Brand, processing speed 0.5 m / min): surface of the treated part Tension 44dyne / cm

After the above treatment, each panel was left in a cool and dark place for one week. Next, the two panels face each other with the part to be sealed (the above-mentioned treated part) facing away and fixed on the pedestal at a distance of 1 cm, and a sealing material (manufactured by Bridgestone Corporation, 1 A liquid modified silicone-based sealing material, Petam MS1000) was applied. 20
After curing for one week in an atmosphere of 55 ° C. and 55% RH and then for one week at 50 ° C., the adhesiveness of the sealing material was evaluated. The results are shown below.

Treatment (A): untreated poor adhesion Treatment (B): corona treatment good adhesion Treatment (C): arc discharge blowing treatment good adhesion

The above results were determined as to which part was destroyed when the two panels were forcibly separated. That is, when both were peeled off at the boundary surface between the sealing material and the painted panel, adhesion was determined to be poor, and when only cohesive failure occurred inside the sealing material, adhesion was determined to be good.

[0024]

The building panel of the present invention has good adhesiveness to a sealing material and can be easily sealed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a state where sealing is performed using the same example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Panel main body 2 Resin coating film 2a Sealed part 2b Non-sealed part 3 Sealing material

Claims (4)

[Claims] In a building panel in which a resin coating film is formed on an outer surface of a panel body and a part of the resin coating film is subjected to sealing processing, the surface tension of at least a part of the coating film part to be sealed is reduced. , 35 dyne / cm or more, and 5 dyne / cm or more larger than the surface tension of a part or all of the unsealed portion of the coating film. 2. The resin coating according to claim 1, wherein the resin coating contains a fluororesin.
Architectural panel as described. 3. The building panel according to claim 1, wherein the panel body is made of metal. 4. A portion of the coating film to be subjected to sealing processing is subjected to electric discharge processing to have a surface tension of 35 dyne / cm or more, and 5 d from the surface tension of a portion not subjected to electric discharge processing.
The building panel according to claim 1, wherein the building panel is higher than yne / cm.