JPH11352893A - Production of name plate and name plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a plastic name plate which has good water resistance and good colorability by placing a pattern sheet on a photosensitive resin plate, irradiating this sheet with light, removing portions exclusive of the photoset portions and subjecting the sheet to a specific treatment, then coloring the sheet. SOLUTION: The pattern sheet 5 is placed on the photosensitive layer 4 side of the photosensitive resin plate 1 consisting of a base 2 and the photosensitive layer 4. The pattern sheet 5 is irradiated with light from above the sheet. The pattern sheet 5 includes the portions where the light is shielded and the portions which are transparent to the light. Next, the pattern sheet 5 is removed and the unexposed portions are washed away by water. Ruggedness is formed only in this stage. The pattern sheet is dried with warm wind (50 to 80 deg.C) and is then irradiated with the light again to ensure the more perfect curing. This resin plate is put into an oven controlled to 140 deg.C and is subjected to a heat treatment, following which the plate is immersed for two hours into an aq. 4% acetic acid soln. This resin plate is spray coating with a certain color over the entire part and thereafter, only the projecting parts are screen printed with a color different therefrom.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a nameplate.

[0002]

2. Description of the Related Art The nameplate referred to here is a plate, a tag, a nameplate, a nameplate, etc. for displaying the name and unit of an instrument.
Of course, the material is plastic from the viewpoints of ease of manufacture and cost.

[0003] Such a nameplate is usually marked with various marks by printing. However, there is a case where a thing having three-dimensional and unevenness is preferred instead of a simple two-dimensional display. This is one of the reasons that the display function is not only noticeable but also long. In addition, since the nameplate is invisible to blind people, it is helpful to engrave Braille. Some countries require it. In such a case, irregularities are essential.

[0004] As a method of manufacturing a nameplate having irregularities, injection molding or compression molding using a mold is used. But,
In the case of a small number of varieties, the cost of manufacturing this mold is large and such a method is difficult. Therefore, it is conceivable to produce a transparent sheet having desired characters and patterns by using a photosensitive resin by photography, copying, or the like, and thereby to manufacture without using a mold. In this case, a resin that can be washed away with water except for the light-cured portion is preferable. The use of water is not only simple but also dangerous and costly. Such a method is similar to a method of manufacturing a simple printing material or a printing plate, and is similar to the method.

[0005]

However, according to this method, the nameplate itself is poor in water resistance and cannot be used in places where rainwater is splashed or other places with high humidity. Further, the coloring property is poor, and the coloring layer often peels off.

Accordingly, there has been a long-awaited need in the art for a method of manufacturing a plastic nameplate which can be easily manufactured and has good water resistance and good coloring.

[0007]

In view of the above situation, the present inventor has completed the manufacturing method of the present invention and the nameplate thereof as a result of intensive studies.
Place the pattern sheet on the photosensitive layer side of the photosensitive resin plate composed of the support and the photosensitive layer, irradiate light from above, light-curing the photosensitive layer of the portion irradiated with light passing through the pattern sheet,
Next, the pattern sheet is removed, the portion other than the portion that has been photocured with water is removed, and then heat treatment, further treatment with an organic acid, and subsequent coloring are performed. The pattern sheet is placed on the photosensitive layer side of the plate, light is irradiated from above, the photosensitive layer at the portion irradiated with the light passing through the pattern sheet is light-cured, then the pattern sheet is removed, and light is irradiated with water. The point is that the part other than the hardened part is removed, treated with an organic acid, further heated, and then colored.

[0008] Here, the support is a plastic plate or a metal plate, and need not be special. Those having weather resistance and strength, such as polyester resin, phenol resin, and epoxy resin, are preferable.

The photosensitive layer is a layer which is polymerized so that it cannot be removed by water upon irradiation with water. The components themselves can be of any kind, but can be removed with water before irradiating with light,
Any material that cannot be removed with water after light irradiation may be used. This is a solid layer, usually polyvinyl alcohol (PV
The composition is obtained by mixing and drying a photosensitive monomer or prepolymer such as acrylic vinyl or the like, a photopolymerization initiator, a stabilizer and the like with A) as a main ingredient. The main agent may be urethane-based or other. The photosensitive monomer or prepolymer does not need to be special, and a usual photopolymerization initiator may be used.

The photosensitive resin plate is obtained by providing this photosensitive layer on the above-mentioned support, and may be provided directly on the support or bonded by an adhesive. The size may be determined according to the size of the nameplate, but is usually about several centimeters to several tens of centimeters both vertically and horizontally. The thickness is also optional, but the thickness of the support is preferably several millimeters, and the thickness of the photosensitive layer is preferably about 0.5 to 1.0 mm. This photosensitive resin plate is already commercially available for the production of the above-described stamping material or printing plate, and may be used, or may be the same as the above, except that only the size and thickness are changed.

The pattern sheet is like a negative of a photograph and has a portion that transmits light and a portion that blocks light. It may be determined whether the character portion is transparent or the other portions are transparent depending on whether the character portion of the nameplate is a convex portion or a concave portion. This can be any sheet, such as hand-written characters and patterns on a transparent plastic sheet, or a negative of a photograph.

Here, the light may be any electromagnetic wave capable of giving energy for curing such as sunlight, ultraviolet rays, and electron beams. It is simple to use ultraviolet light from an ultraviolet irradiation device.

The removal of a portion other than the portion which has been light-cured by water means that the water is removed from the support by physical or chemical force. Therefore, they do not need to be completely dissolved in water, but need only be removed with water. The water is preferably warm water of about 30 to 60 ° C. Since it is not necessary to dissolve completely, the photosensitive monomer or prepolymer may contain some water insolubles. To facilitate removal, water may be sprayed under pressure or a brush or the like may be used.

The degree of heating depends on the time of acid treatment, the type of acid,
Also, it depends on the degree of polymerization of the PVA used. The higher the heating temperature, the higher the water resistance. In that sense, 150
~ 170 ° C is good. However, when the treatment is performed at 150 ° C. or more, cracks often occur in the adhesive layer, which causes peeling of the colored portion. Therefore, the heating temperature is 120-160 ° C,
Particularly, 140 to 150 ° C. is preferable. There is no problem because the water resistance (easiness of peeling of the painted portion, adhesion of the paint, etc.) is compensated by the following acid treatment. The heat treatment method is easy to perform in an oven. The time may be 60 to 150 minutes, and preferably about 120 minutes.

The organic acid is preferably one having a relatively low molecular weight. For example, acetic acid, propionic acid and the like. As a method of acid treatment, a method of immersing in an aqueous solution of about 1 to 5% for 1 to 2 hours is simple. Further, according to the experiment of the inventor, the brewed vinegar also showed a better effect than a simple acetic acid aqueous solution. This is thought to be due to the alcohol contained in the brewed vinegar, but it is uncertain.

The acid treatment and the heat treatment markedly improved the water resistance and the coloring property. However, as long as the photosensitive resin plate was used for producing a stamping material or a printing plate as in the prior art, such a water resistance and coloring property were improved. Sex is a physical property that is unnecessary and does not pose a problem in the first place. Therefore, as mentioned above, the nameplate had to be formed by injection molding or compression molding.

The order of the above-described acid treatment and heat treatment may be reversed.

The uneven plate thus formed is colored, but the coloring method and the type of paint are not limited. Even when one color is applied, the concave portions and the convex portions may be made different colors to make the characters or the like stand out. Further, it may be applied using a stencil or screen printed. Only one of the concave portion and the convex portion may be colored.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings. FIG. 1 is a sectional view showing an example of a photosensitive resin plate 1 used in the method of the present invention. A photosensitive layer 4 (about 1 mm thick) is provided on a support 2 (about 3 mm thick) made of phenol resin via an adhesive layer 3. The photosensitive layer 4 is made of polyvinyl alcohol 7
0% by weight, 28% of acrylic vinyl monomer, 1% of photopolymerization initiator, and 1% of stabilizer were mixed and dried.

FIG. 2 is a schematic sectional view showing the steps of the method of the present invention. FIG. 2A is a sectional view of the photosensitive resin plate 1. The place where the pattern sheet 5 is placed thereon is shown in FIG. In the drawings, thickness and the like are not to scale. The pattern sheet 5 has a portion that blocks light and a portion that transmits light. FIG. 2C shows a state where light is irradiated from above the pattern sheet 5 (ultraviolet light is applied for 2 to 6 minutes). The light transmitting portion of the photosensitive layer 4 is polymerized (polymerized so as not to be dissolved by water). (D) shows the pattern sheet 5 removed. Then, the unexposed portions are washed away with water. At this stage, irregularities are formed only for the first time. And warm air (50 ~
(80 ° C.) and then re-irradiated with light to make the curing more complete. This completes the forming process.

This was placed in an oven controlled at 140 ° C. and heat-treated for 120 minutes. Then, it was immersed in a 4% aqueous solution of acetic acid for 2 hours.

This was spray-painted with the color 5 as a whole, and then screen-printed only with the color 6 different from the color.
FIG. 3 shows the letters ABC raised by this method, and the raised portions are colored. If this character is used as a name, it becomes a nameplate.

[0023]

The nameplate of the present invention and the method of manufacturing the same have the following advantages. Very easy to manufacture. Because it has excellent water resistance, it can be used for a long time even in places that get wet with rain. It has excellent coloring properties and hardly peels off paint over a long period of time. Braille for the blind can also be easily engraved at the same time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a photosensitive resin plate used in the present invention.

FIG. 2 is a schematic sectional view showing a manufacturing process of the present invention.

FIG. 3 is a perspective view showing an example of a nameplate according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 photosensitive resin plate 2 support 3 adhesive layer 4 photosensitive layer 5 pattern sheet

Claims (4)

[Claims] 1. A pattern sheet is placed on a photosensitive layer side of a photosensitive resin plate composed of a support and a photosensitive layer, and light is irradiated from above the pattern sheet, and a portion of the photosensitive layer irradiated with light passing through the pattern sheet is irradiated. A light-curing method, and then removing the pattern sheet, removing portions other than the light-cured portion with water, heating, and further treating with an organic acid, followed by coloring. 2. A pattern sheet is placed on a photosensitive layer side of a photosensitive resin plate comprising a support and a photosensitive layer, and light is irradiated from above the pattern sheet, and a portion of the photosensitive layer irradiated with light passing through the pattern sheet is irradiated. A nameplate characterized by being light-cured, then removing the pattern sheet, removing portions other than the portion light-cured with water, heating, and further treating with an organic acid, followed by coloring. 3. A pattern sheet is placed on a photosensitive layer side of a photosensitive resin plate comprising a support and a photosensitive layer, and light is irradiated from above the pattern sheet, and a portion of the photosensitive layer irradiated with light passing through the pattern sheet is irradiated. A light-curing method, and then removing the pattern sheet, removing portions other than the light-cured portion with water, treating with an organic acid, and further heating, followed by coloring. 4. A pattern sheet is placed on a photosensitive layer side of a photosensitive resin plate comprising a support and a photosensitive layer, and light is irradiated from above, and a portion of the photosensitive layer to which light passing through the pattern sheet is irradiated is applied. A nameplate characterized by being light-cured, then removing the pattern sheet, removing portions other than the light-cured portion with water, treating with an organic acid, further heating and coloring.