KR20070097882A - Pc inray manufacturing process having the texture of aluminum - Google Patents

Abstract

A method for manufacturing a PC(Polycarbonate) inlay with the texture of aluminum is provided to express the texture of aluminum without using aluminum materials and to secure excellent durability by preventing wear of a printed part due to back printing. A method for manufacturing a PC inlay with the texture of aluminum comprises the steps of: producing a photo-sensitive film by applying photo-sensitive solution on silk yarns one or three times by using silk screen printing; making a light absorption plate on the back side of a contact film that is not exposed to the light, by using a halation preventing layer; stacking the film, the silk photo-sensitive film, and the light absorption plate from the upper side in order with coming into contact with each other, exposing the stacked material to the light in a vacuum press device, and then dipping the material in phenol solution and drying the dipped material; and printing words or pictures on a PC film.

Description

Manufacturing method of polycarbonate inlay with aluminum texture {PC INRAY MANUFACTURING PROCESS HAVING THE TEXTURE OF ALUMINUM}

1 is an explanatory diagram for a method of manufacturing a photosensitive film.

2 is an explanatory diagram for the generation of a halation phenomenon according to the photosensitive film.

3 is a structural cross-sectional view of the adhesion film.

4 is an explanatory diagram and a cross-sectional view of a light absorbing plate manufacturing method.

5 is a close-up flowchart of the film, the photosensitive film, and the light absorbing plate before exposure.

FIG. 6 is a view of a completed text engraving and a drawing of fine drawing lines. FIG.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative panel having an aluminum material and a name plate manufacturing method for use in electronic products and the like.

Conventionally, in order to decorate nameplates of electronic products and the like, primary patterns are formed on the surface of high-purity aluminum sheet by mechanical or chemical polishing methods such as tod line, hair line, and sanding, and then numerous processes such as degreasing, washing, and chemical polishing are performed. After roughing, the material is anodized, washed with water, coated with a photoresist on the surface, dried, washed with water under post-exposure development, stained and sealed, and a double-sided tape is attached to the backside and finished. I've used to do it.

Therefore, using expensive aluminum plates, equipment and processing by various mechanical processes caused a problem of cost increase due to high costs, as well as various chemicals such as acid and alkali and ammonium bichromate, which are heavy metals. Was generated in large quantities. In addition, complex process steps are required, resulting in high cost and low product productivity due to a large number of people. In addition, the conventional armite products have a problem of poor durability due to a small friction or impact flaw well. Therefore, it is urgent to improve the plan to reduce the unnecessary process to reduce the production cost and suppress pollution.

The present invention is to reduce the cost by using a polycarbonate (PC) sheet to solve the above problems, to increase the durability by the back printing, and to simplify the process steps. In addition, by using a polycarbonate material on the back of the transparent material by the seal screen printing method by the pattern and color processing to produce a product that can represent the aluminum texture in a simple process.

The present invention relates to a method of manufacturing panels and name plates having an aluminum texture of electronic equipment.

The present invention comprises the steps of producing a photosensitive film by first or third coating the photosensitive liquid on the silk yarn by using a silk screen printing method, the step of manufacturing a light absorbing plate using the anti-halation layer on the back unexposed film, film, Manufacturing a polycarbonate inlay having an aluminum texture comprising the step of placing the silk photoresist, the light absorbing plate in close contact from the top, and then exposing to a vacuum contactor and printing a character or picture on the polycarbonate film after the steel film treatment step It is about a method.

When the photosensitive film is manufactured, the silk yarn is preferably 400 to 450 mesh, and in the case of printing a picture pattern, the silk yarn is preferably selected to a dot of 120 to 150 mesh. The photosensitive liquid is dissolved in 500cc of polyvinyl alcohol in 500cc of water and heated for 20 to 30 minutes, and then mixed with two drops of ammonia water and 0.05% octyl alcohol in total amount, and a small amount of ammonium dichromate is added immediately before application of the photoresist. It is especially good to make gelatin as a raw material. When preparing the photoresist film, immediately before application of the photoresist solution, a small amount of phenolic acid solution of less than 5% is added to the photoresist and mixed and applied, and after precipitation and drying of the silk plate, the precipitate is dried and dried again in the phenol solution.

Preferably, the light absorbing plate uses a anti-halation layer on the back surface of the film, and in the exposing step, it is preferable to manufacture polycarbonate inlay by irradiating ultraviolet rays for 2 to 5 minutes using a 3KW UV metal lamp.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The first process is a step of producing a photosensitive film by silk screen printing by first or third application of a photoresist to silk yarn. It is preferable to form a hair line in the case where the photoresist is first applied and the thickness thereof is thin. In the case of the third application of the photoresist, the photoresist is suitable for text printing. . This is an improvement of the conventional silk screen printing process, as shown in Figure 1, the screen silk yarn or stainless steel is fixed on a square frame made of wood or aluminum cubes, and then there Apply photoresist. In this case, using a squeegee, the photosensitive liquid is applied to the surface of the silk yarn in a uniform thickness, and then dried, and the photosensitive liquid is re-coated once or twice. At this time, the thickness of the photoresist is thickened to compensate for wear on the surface of the ink or sun resistance.

In the silk screen printing process as described above, it is preferable to use a screen yarn in the range of 400 to 450 mesh (silk) yarn, and when printing printing including a picture pattern, the screen yarn of the screen film is 120 It is preferable to select from 150 mesh size. The ratio of screen yarn to mesh is preferably 2.5: 1 to 4: 1.

In addition, most photoresists are used by dissolving 70 g of polyvinyl alcohol (PVA) in 500 cc of water for the storage of products. After heating for about 20-30 minutes, two drops of ammonia and 0.05% of octyl alcohol are mixed. Thereafter, it is common to add a small amount of ammonium dichromate immediately before application of the photoresist and mix well with Hera. However, it is more preferable to use gelatin photosensitive liquid. Method for preparing a gelatin photosensitive liquid is as follows. In the method for preparing gelatin photoresist, first, 8 times of water is added to purified gelatin corresponding to 10% of the total amount and heated for 5 hours or more, and this is heated by adding 10 times of water to the purified bure corresponding to 2% of the total amount. Mix in the material. Add a small amount of aqueous ammonia and add about 5% of the octyl alcohol, add a formalin solution within 2% of the total amount, keep it in a warm state by stirring, and use an appropriate amount of ammonium dichromate each time used.

This is different from the gravure printed or silk printed products on the existing aluminum vacuum vapor deposition film, it is more delicate than the conventional silk printing technique and can express excellent metallicity. Conventional silk-printed plate making has been common to give a three-dimensional impression to the printed portion of the product, and to thicken the thickness of the valve in consideration of wear resistance and daylight resistance, but when using this method, the quality for making precise and delicate characters or pictures is inferior. According to the present invention, by improving and using the silk screen printing process as described above, the thickness of the photosensitive film of the printing plate is made thin to produce precise and delicate letters or pictures, while at the same time increasing the durability of the thinned photosensitive film and preventing halation. Is also excellent. For reference, the halation phenomenon refers to a fog pattern generated when a photo is taken on a photo plate or when a film is exposed, light entering the photosensitive surface of the film is reflected on the base surface of the film to again expose the photosensitive layer ( fog).

Before explaining how to reduce the halation phenomenon during silk engraving, the factors that cause the halation phenomenon are described. First, referring to FIG. 2, it can be seen that the halation phenomenon is first proportional to the thickness of the photosensitive film applied to the silk mesh. In the case of applying the third photosensitive liquid as A in FIG. 2 (a), the degree of reflection is greater than that in the case of the first coating and the thin film. In addition, when the film layer and the light absorbing plate layer are upside down as shown in FIG. 2B (halation phenomenon observation 2), the halation phenomenon increases when compared with FIG. 2B (halation phenomenon observation 1). It can be observed that it is also proportional to the radiation of the light reflected by the white silk yarn. 2 (c) (observation of the transparency of the photosensitive film and the absorbance of the light absorbing plate), it can be seen that it is proportional to the absorbance of the light absorbing plate and the transparency of the photosensitive film.

In this manner, the larger the halation phenomenon is, the more difficult it is to produce a plate making fine and delicate lines. Therefore, in the present invention, silk yarn is produced by the following method. First, the thickness of the photosensitive film applied to the silk mesh should be as thin as possible. Then, the picture portion (black portion) of the constructed adhesive film is matched with the photoresist surface on the silk mesh. The anti-halation layer of the light absorbing plate should be in close contact with the photosensitive film side of the silk yarn. At this time, the film should not be turned upside down. Since the photoresist film should have high transparency, it should be well refined when selecting an emulsion raw material to make a photoresist, and it should be transparent, but it is necessary to remove the impurity layer that floats over a long period of time at a low temperature even when it is dissolved in water and boiled. For this reason, it is preferable to prepare the photoresist with gelatin which is better than the transparency of the high-azole photoresist. In order to raise the light absorption rate of a light absorption plate, it is preferable to manufacture a light absorption plate according to the following process 2. White silk yarn should be dyed with a pigment that is easy to discolor to prevent diffuse reflection of light. In order to compensate for the thinner photoresist, less than 5% of phenol-formaldehyde (phenol-formaldehyde) was applied to the photoresist immediately before application of the photoresist. The best film forming effect is obtained by drying after precipitation, which has been proved by experiment.

The second step is a step of producing a light absorbing plate suitable for producing the name plate according to the present invention. Hereinafter will be described with reference to Figure 4 (a) and (b). After masking (see FIG. 4 (b)) with an aste film on the back of the untouched film, the film in the unexposed state is developed with a developer, and then washed with water. In this case, only the film support plate of a transparent color remains unless masking is performed. Various types of light absorbing paper can be used, and it is preferable to use an anti-halation layer on the back of the film (see Fig. 3). In FIG. 3, a film plate in which an anti-halation layer remains directly below a polyester film is manufactured, which is the most preferred embodiment. Fig. 4 (b) shows the completed light absorbing plate.

When the adhesive ink made by mixing the appropriate amount of solvent is applied to the surface of the silk yarn, the ink penetrates into the silk yarn portion except for the remaining gomazole and adheres to the back surface of the polycarbonate (PC) film, for example, a bisphenol-A film. . The printed pattern closely adhered to the back side of the polycarbonate film can also be seen from the front side, and because it is printed on the back side, the durability is strong. It is used for the printing of letters and schematics, and for printing fine picture patterns. In general, it is mainly used for hair line finishing, and may also be sanded. By attaching a double-sided tape to the back of the name plate produced in the above manner can be conveniently used.

As described above, the silk yarn is held and fixed to the square frame of aluminum or wood, and then dried by applying a photosensitive solution on the third layer. In the third step, as shown in FIG. 5, the film, the silk photosensitive film square frame, and the light absorbing plate constructed from above are brought into close contact with each other in order, and then exposed in a vacuum contactor. After the character film made as described above is placed on the silk yarn coated with the photosensitive liquid, the glass plate is covered thereon, and a light absorbing plate is placed on the back of the silk yarn to support a sponge with good elasticity so that the film and the silk yarn adhere closely. This is baked using a vacuum contactor. The light source is turned on from below, and after irradiating ultraviolet rays with a light source 3KW UV metal lamp for about 2 to 5 minutes and removing the film, the glass plate, and the absorbent paper and the sponge on the back surface, Therefore, the exposed part is cured, and the part not exposed to light melts in developer or water and comes off from silk yarn. It is sufficiently washed with water and dried.

6 is a printing plate of the finished character engraving and fine lines, and after printing the completed plate making to the printing machine.

The ink is preferably selected in consideration of the affinity with the material to be printed. When fire and affinity are not selected, the ink is printed or coated with an interfacial adhesive, or a small amount of etching is used for the raw material. In this embodiment, it is preferable to use DMS ink miller 100 (model name) when using a polycarbonate fabric. The ink is well expressed metal texture, and excellent adhesion, the adhesion of the double-sided tape after adhesion is very excellent does not drop the film of the ink.

When manufacturing the inlay according to the manufacturing process of the present invention, it is possible to feel the aluminum material without using the aluminum material, and because it prints on the back, there is no fear of abrasion of the printed portion is excellent in durability. In addition, the process has the advantage of a simple process and low cost.

Claims (3)

Preparing a photoresist film by first or third application of a photoresist to silk yarn using a silk screen printing method; preparing a light absorbing plate using an anti-halation layer on a back surface of an unexposed contact film, a film, a silk photoresist film, Method of manufacturing a polycarbonate inlay having an aluminum texture comprising the step of placing the light absorbing plate in close contact from the top and then exposure to a vacuum contactor and a film forming step after the film forming process. The method of claim 1, In the preparation of the photoresist film, a polycarbonate having an aluminum texture, characterized in that the coating solution is mixed with a small amount of less than 5% phenolic acid solution in the photosensitive liquid immediately before application of the photoresist, and precipitated and dried again in the phenolic acid solution after the baking and photosensitive of the silk plate is finished. Inlay manufacturing method. The method of claim 1, The light absorbing plate is a polycarbonate inlay manufacturing method having an aluminum texture, characterized in that to use the anti-halation layer on the back of the film.

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