JP2001121064A - Ultraviolet curable type coating material and curing method by ultraviolet and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a means for curing and drying a coating film of an ultraviolet curable type coating material or resin from the inner side to the surface by ultraviolet rays. SOLUTION: A coating film 5 of an ultraviolet curable type coating material or resin applied to the surface of a floor, a wall, a table, a counter and the like is cured and dried from the inside to the surface at a high speed by two- step ultraviolet irradiation to protect or to polish the surface. Consequently, first step ultraviolet ray irradiation is carried out to a coating film 5 in a range from 500 mJ/cm2 to 4 J/cm2 ultraviolet irradiation dose by a first illumination apparatus 4 comprising a metal halide lamp containing additives such as iron iodide, gallium iodide or the like and having main wavelength of 350 to 450 nm and further second step ultraviolet ray irradiation is carried out in a range from 300 mJ/cm2 to 2 J/cm2 ultraviolet irradiation dose by a second illumination apparatus 9 comprising a high pressure mercury lamp having main wavelength of 200 to 380 nm to cure and dry the coating film 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention provides an ultraviolet-curable paint or resin for protecting or polishing a surface of a film directly or adhered to a surface of a floor, a wall, a table, a counter, or the like. The present invention relates to a method of effectively irradiating ultraviolet rays for applying a thick paint or coating, which is cured and dried by ultraviolet rays, and to an apparatus capable of irradiating ultraviolet rays economically.

[0002]

2. Description of the Related Art Conventionally, in a process of overcoating or repairing a floor, a wall, a table, a counter, or the like, repair with wax or the like is generally performed. However, repair of wax or the like has a defect that it takes 2-3 hours for natural drying. In addition, wax has a problem in durability, not only does maintenance work need to be performed about once a month, but the surface does not have water resistance,
There were defects such as white turbidity.

[0003] In recent years, the use of curing and drying by ultraviolet rays has been performed faster than natural drying and heat ray drying, and the effect has been improved. However, paints for overcoats and repairs generally need to cure thick paints of tens to hundreds of microns, and sometimes millimeters, unlike UV curable inks and coatings for printing and semiconductor films. It is. In this case, the type of the ultraviolet light is usually irradiated by an ultraviolet irradiator containing a metal halide lamp or a high-pressure mercury lamp, and then cured and dried.

[0004]

Although each of these methods has an effect on curing and drying, each method requires a long working time and is not economical, and the finish of the coating film is insufficient. There are drawbacks. For example, when a high-pressure mercury lamp was used, the surface of the coating film was cured, but the inside was insufficiently cured. On the other hand, when a metal halide lamp was used, the curing progressed to the inside but the surface curing was insufficient. SUMMARY OF THE INVENTION An object of the present invention is to provide a method and an apparatus which can eliminate the above-mentioned drawbacks and can rapidly and economically irradiate a coating film with ultraviolet rays.

[0005]

To achieve the above object, the present invention has the following means and configurations. A. An original design is created directly on the surface of a floor, wall, table, counter, or the like by a film having a pattern printed thereon or by a computer, and the film with the design is printed on the surface of the floor, wall, table, counter, etc. Adhering, applying an ultraviolet-curable paint or resin to the surface of the film, curing and drying the coated film from the surface to the inside at a high speed by two-step ultraviolet irradiation, and protecting or polishing the surface. .

B. For UV-curable paints or resins
Iron iodide having a main wavelength of 350 to 450 nm, or iodine
Metal halide lamp containing additives such as gallium arsenide
UV irradiation dose of 500 mJ by the first irradiator consisting of
/ Cm^Two From 4J / cm^Two The first stage UV in the range
And further irradiates a high wavelength having a main wavelength of 200 to 380 nm.
UV irradiation by a second irradiator such as a pressure mercury lamp
The irradiation amount is 300mJ / cm ^Two From 2J / cm^Two In the range
Irradiation of ultraviolet light in the second stage
Characterized by curing and drying of curable paint or resin
I have.

C. A first-stage irradiator composed of a metal halide lamp in which an additive such as iron iodide or gallium iodide is sealed is applied to an ultraviolet-curable paint or resin, and a first-stage ultraviolet ray is radiated. A second irradiator is used to irradiate and cure and dry the second-stage ultraviolet light, and the first and second irradiators each have a reflecting plate made of high-purity aluminum or an ultraviolet reflecting mirror that reflects ultraviolet light well. When the first and second irradiators are arranged in the same container, the first irradiation is performed first, and then the first irradiation is performed. The second irradiator is disposed after the vessel and the second irradiator is disposed after.

[0008]

According to the above-mentioned means and structure, a coating film made of a UV-curable paint or resin can be quickly and economically formed with a good finish even if it is thick. . As a first-step ultraviolet irradiation, a coating film of an ultraviolet-curable paint or resin is irradiated by a metal halide lamp in which an additive such as iron iodide or gallium iodide having a main wavelength of 350 to 450 nm is enclosed. The inside of the film is fully cured and dried. At this time, the amount of ultraviolet irradiation is 5
A range from 00 mJ / cm ² to 6 J / cm ² is appropriate.

[0009] Further, the amount of ultraviolet irradiation is 6 J / cm ²
The above-mentioned irradiation is sufficient for drying and curing, but has the disadvantage of hindering the floor surface or wall surface which is a coating and a material, and furthermore, the irradiation time is long, so that rapid and economical irradiation which is a feature of the present invention is achieved. Cannot be performed. UV irradiation dose is 50
If it is 0 mJ / cm ² or less, drying and curing become insufficient. In addition, when irradiation is performed only with the metal halide lamp, the inside is sufficiently cured and dried, but the treatment of the surface of the coating film is more effectively performed by a high-pressure mercury lamp in a relatively short wavelength range. Therefore, the two-step ultraviolet irradiation according to the present invention is more effective.

[0010] As the second stage ultraviolet light, 200 to 3
By irradiating with a discharge lamp such as a high-pressure mercury lamp having a main wavelength of 80 nm, the surface of the coating film is also sufficiently cured and dried. If the irradiation amount of the ultraviolet ray is 300 mJ / cm ² or less, the surface hardening becomes insufficient. If the amount of ultraviolet irradiation is about ² J / cm ² , the surface hardening is sufficient,
Even if the irradiation time is further increased, the rapid and economical effects characteristic of the present invention are lost. Therefore, by performing such a two-stage irradiation, a coating film that is quick, economical and has a good finish can be formed.

[0011] In the apparatus of the present invention, when the first stage irradiation is performed first, and then the second stage irradiation is performed, and the first and second irradiators are arranged in the same container, By arranging the first irradiator before the second irradiator, the coating film is hardened and dried from the surface to the inside at a high speed, and the protection or polishing of the surface is economically performed.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings and tables. In FIG. 1, reference numeral 1 denotes a discharge lamp such as a metal halide lamp having a main wavelength of 350 nm to 450 nm. The upper and right and left sides of the discharge lamp are semicircular arc-shaped reflectors made of high-purity aluminum or an ultraviolet reflecting mirror that reflects ultraviolet light well. Covered with a plate 2 and housed in a casing (container) 3
Is constituted. This first irradiator 4
An original design is created directly on the surface of a floor, wall, table, counter, or the like by a film having a pattern printed thereon or by a computer, and the film with the design is printed on the surface of the floor, wall, table, counter, etc. The coating film 5 made of a UV-curable paint or resin adhered and applied to the surface of the film is irradiated with ultraviolet rays to be cured and dried.

FIG. 1B shows a cured state when the first irradiator 4 of FIG. 1A irradiates the coating film 5 with an ultraviolet ray irradiation amount of ² J / cm ^2. Of the surface portion 6 is insufficient. Further FIG.
(D) is similar to the first irradiator 4 of (a), but the ultraviolet irradiation amount is increased by the first irradiator 4 shown in (c) and 6 J /
is an example of a cm ² or more, but the internal curing of the coating layer 5 is further leads the In the case of (b), hardening of the surface portion 7 is still insufficient. Further, it was found that when the irradiation amount of the ultraviolet rays was 6 J / cm ² or more, the floors, walls, tables, counters and the like, which are the coating and the material, were obstructed (see Table 1).

In FIG. 2, reference numeral 8 denotes a discharge lamp such as a high-pressure mercury lamp having a main wavelength of 200 nm to 380 nm. And a second irradiator 9 which is covered with a reflecting plate 2 made of high-purity aluminum or an ultraviolet reflecting mirror which reflects ultraviolet light and accommodated in a casing 3.
Is composed. Like the first irradiator 4, the second irradiator 9 irradiates the coating film 5 made of an ultraviolet-curable paint or resin with ultraviolet rays, and cures and drys it.

FIG. 2 (b) shows a cured state when the coating film 5 is irradiated with the ultraviolet irradiation amount of 1 J / cm ² by the second irradiator 9 of FIG. 2 (a). Part 1
Only 0 is cured and the inside is uncured. Further, FIG.
Is an example in which the amount of ultraviolet irradiation is increased to 4 J / cm ² or more by the second irradiator 9 shown in (c), which is the same as (a). Although the process proceeds more than in the case of the part 10, the inside is uncured as in the case of (b).

[0016]

[Table 1]

[Table 2]

Tables 1 and 2 show the amount of ultraviolet irradiation by the first irradiator (metal halide lamp) 4 and the second irradiator (high-pressure mercury lamp) 9 and the drying state of the coating film. In Table 1, the amount of ultraviolet irradiation was 6 J / c.
If it is at least m ^2, a good drying state can be obtained to some extent, but it is understood that the drying time is long and not only practical, but also the finish is not good. In Table 2, it can be seen that even when the ultraviolet irradiation time is 4 J / cm ² or more, the inside of the coating film is not cured.

The present invention has been made based on the above findings. As shown in FIG. 3, a first irradiation similar to that shown in FIGS. 1A and 1C is performed on a coating film 5C. Irradiation in the first stage is carried out at a UV irradiation dose of ² J / cm ² by a vessel 4 (a), and UV irradiation is carried out by a second irradiation machine 9 (b) similar to FIGS. 2 (a) and 2 (c). ^2nd at 1 J / cm 2
When the irradiation at the stage is performed, the inside and the surface of the coating film 5 are completely cured and dried. According to the present invention, the means shown in FIG. 3 was able to cure and dry the finish well even if the coating film 5 made of an ultraviolet-curable paint or resin was thick.

FIG. 4 shows a first embodiment of the ultraviolet irradiation apparatus according to the present invention. FIG. 4 shows a plurality of the first and second irradiators 4 and 9 shown in FIG. 3 arranged in order. That is, as shown by the solid line, two first irradiators 4 are arranged in front, and two second irradiators 9 are arranged behind them. Then, by moving the coating film 5 in the direction of the arrow, first, the first irradiator 4 receives ultraviolet irradiation, and then the second irradiator 9 receives ultraviolet irradiation, and then receives two-step irradiation. To cure and dry. When the coating film 5 is cured and dried, the coating film 5 may be fixed and the irradiation device may be moved (to the left in the drawing). When the irradiation units 4 and 9 are further installed, they may be added before and after the first and second irradiation units 4 and 9, respectively, as shown by dotted lines.

FIG. 5 shows a second embodiment of the ultraviolet irradiation apparatus according to the present invention. In the second embodiment, a large casing 12 having a long length in the lateral direction (left and right in the drawing) is provided instead of the casing 3 of the first and second irradiators 4 and 9. An irradiation device is configured by arranging a plurality of reflectors 2 and discharge lamps 1 and 8 similar to those of the first and second irradiators 4 and 9 in 12. The arrangement of the reflector 2 and the discharge lamps 1, 8 is the same as that of the first embodiment in FIG.
Two discharge lamps 1 are arranged, and two discharge lamps 8 are arranged behind them. Then, by moving the coating film 5 in the direction of the arrow, two-stage irradiation can be performed in one step. Discharge lamp 1,
When the number of discharge lamps 8 is further increased, the reflector 2 and the discharge lamps 1 and 8 may be added to both left and right end portions of the large casing 12 as shown by dotted lines. At this time, the large casing 12 is extended by removing the left and right side plates of the large casing 12.

Table 3 shows the coating film 5 shown in FIGS.
The cured and dried state is shown. The coating film 5 is irradiated with ultraviolet rays of 500 mJ / cm ² to 4 J / cm ² by the first irradiator 4 having a main wavelength of 350 nm to 450 nm in the first step, and 200 nm to 380 in the second step.
When the second irradiation device 9 having a main wavelength of nm irradiated the ultraviolet ray in the range of 300 mJ / cm ² to ² J / cm ² , the inside and the surface were completely cured. The amount of ultraviolet radiation required for internal curing of the coating film 5 is smaller than the amount required for the metal halide lamp in Table 1, and the amount of ultraviolet radiation required for curing the surface of the coating film 5 is the high pressure mercury lamp in Table 2. And the economic effect is large, and the method of the present invention proves that the curing is sufficient and extremely practical.

[0022]

[Table 3]

[0023]

As described above, according to the method and the apparatus for curing the ultraviolet-curable paint or resin according to the present invention, the following effects can be obtained. . Iodide iron to 450nm from 350nm as a first stage and a main wavelength, or additives such as iodide gallium at Encapsulated metal halide lamp from 500 mJ / cm ² 4
Irradiation with ultraviolet light of J / cm ² , 200
UV-curable paint or resin when irradiated with a second-stage UV ray in a range of 300 mJ / cm ² to ² J / cm ² by a discharge lamp such as a high-pressure mercury lamp having a main wavelength of 38 nm to 38 nm. Paint film,
Both the inside and the surface can be completely cured and dried. In addition, the amount of UV irradiation required for curing and drying of the coating film is smaller than the conventional required amount, and the economic effect is large,
Extremely practical.

[0024] The apparatus according to the present invention incorporates a high-purity aluminum or ultraviolet reflecting mirror, each of which reflects ultraviolet rays well, and arranges an irradiator continuously so that the first-stage irradiation can be performed first and the second-stage irradiation can be performed later. Set up
Also, before the first stage discharge lamp in the same irradiator,
By arranging the discharge lamp of the stage later, the device can be downsized,
Usability has also improved. Also, the coating film may be irradiated by the irradiation device while moving on a conveyor or the like, or the coating film may be cured and dried so that the irradiation device passes at a constant speed above the coating film. Is also good.

[0025] As described above, in the present invention, two-stage ultraviolet irradiation is continuously performed on the coating film, so that not only the drying and curing of the paint or the resin applied to the floor surface or the wall surface, but also the formation of a thick ultraviolet curing film is performed. Because it can be used, efficient use of ultraviolet curing for various coatings and various paints and economic effects are expected. Further, according to the present invention, the finish of the coating film is not deteriorated and the floor surface and the wall surface are not hindered as in the related art.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a first irradiator and a cured state of a coating film by the first irradiator.

FIG. 2 is an explanatory diagram of a second irradiator and a cured state of a coating film by the second irradiator.

FIG. 3 is an explanatory view showing a state in which a coating film is cured by using both the first and second irradiators according to the present invention.

FIG. 4 is an explanatory view of a first embodiment of the ultraviolet irradiation device according to the present invention and a cured state of a coating film.

FIG. 5 is an explanatory view of a second embodiment of the ultraviolet irradiation device according to the present invention and a cured state of a coating film.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 Discharge lamp such as metal halide lamp 2 Reflector plate made of high-purity aluminum or ultraviolet reflecting mirror that reflects ultraviolet rays well 3 Casing (container) 4 First irradiator 5 Coating film made of ultraviolet-curable paint or resin 6,7,10 , 11 Surface of coating film 8 Discharge lamp such as high pressure mercury lamp 9 Second irradiator 12 Large casing

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D075 AC43 AE03 BB26Y BB26Z BB46Y BB46Z CA47 CB11 DA06 DB18 DC02 EA21 4F042 AA02 BA22 DB41

Claims (3)

[Claims] 1. An original design is created directly on a surface of a floor, a wall, a table, a counter, or the like by a film having a pattern printed thereon or by a computer, and the film on which the design is printed is placed on the floor, wall, table, or the like. The film is adhered to the surface of a counter or the like, and the surface of the film is coated with an ultraviolet-curable paint or resin.
A method of curing an ultraviolet-curable paint or resin with ultraviolet light, wherein the coating is cured and dried at high speed from the surface to the inside by irradiating ultraviolet rays at a stage to protect or polish the surface. 2. An ultraviolet curing type paint or resin for 3
The irradiation amount of the ultraviolet ray was 500 mJ / by a first irradiator comprising a metal halide lamp in which an additive such as iron iodide or gallium iodide having a main wavelength of 50 to 450 nm was enclosed.
cm ² from irradiated with ultraviolet light of the first stage in the range of 4J / cm ^2, 2J further amount of UV irradiation by the second irradiation device consisting of a high-pressure mercury lamp whose main wavelength of 200~380nm from 300 mJ / cm ^{2 2. The method} for curing an ultraviolet-curable paint or resin according to claim 1, wherein the ultraviolet-curable paint or resin is cured and dried by two-step irradiation of irradiating a second step of ultraviolet light in the range of / cm ^2. . 3. A first irradiation device comprising a metal halide lamp in which an additive such as iron iodide or gallium iodide is encapsulated is applied to an ultraviolet-curable paint or resin. A second irradiator such as a mercury lamp is used to irradiate and cure and dry the second-stage ultraviolet light, and the first and second irradiators are each made of a high-purity aluminum or an ultraviolet reflecting mirror which reflects ultraviolet light well. When the first and second irradiators are arranged in such a manner that the first stage irradiation is performed first and then the second stage irradiation is performed, and the first and second irradiators are arranged in the same container, An ultraviolet curing device for an ultraviolet curable paint or resin, wherein the first irradiator is disposed before the second irradiator.