JPH0322832B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is characterized in that lines and patterns are embedded in a transparent coating film, and the surface is formed into a smooth surface that can be smoothed with a felt-tip pen or the like. The present invention relates to a method for simply and quickly manufacturing a board that can be used as a bulletin board or writing board, on which information can be written on and repeatedly written on and erased.

[Prior art] Lines and patterns of this type are embedded in the paint film, and characters and line symbols can be written smoothly without sticking to the printed area, and can be easily written by repeated wiping. As something that will not wear out even if it is worn out,
There is one published in 19742.

This blackboard is made by dissolving a water- and organic-solvent soluble resin in an organic solvent, mixing a solvent-soluble dye with it to make ink, and printing an appropriate pattern with the ink on the coated surface of the surface material, which has been baked with paint. After heating and drying, it is washed with water to form a printed pattern on the coating surface.

[Problems to be Solved by the Invention] However, according to the method, as shown in each example, a resin soluble in water and an organic solvent is dissolved in an organic solvent, and a solvent-soluble dye is mixed therein with stirring. Furthermore, since the ink is adjusted by leaving it for about half a day and filtering off the insoluble matter, it is necessary to consider the mixing ratio, leave it for a certain period of time, and filter off the unnecessary matter. It was necessary to print an appropriate pattern, heat dry it, and then wash it with water, which was a tedious process and required a lot of time, and the work efficiency was not improved. Furthermore, since the waste water after washing contains various dyes, if it is easily disposed of, it may cause pollution problems such as river contamination.

[Means to Solve the Problems] Therefore, the present invention was devised to improve work efficiency by easily transferring ink to a writing board and eliminating the need for washing with water. The printing paper on which lines and desired designs have been printed is placed on an iron plate coated with transparent polyurethane paint on the surface, with the printed side facing each other, and heated and pressed to the sublimation temperature of the printing ink to ink the drawing ink. The printed surface is diffused and penetrated into the inside of the polyurethane paint by vaporizing it, thereby forming a transparent coating film with a smooth surface.

[Function] The present invention uses printing ink containing a sublimable dye to print lines and desired patterns (advertisements, public notice designs).
The printed paper is stacked with the printed side facing an iron plate coated with a transparent polyurethane paint on the surface, and heated and pressurized to the sublimation temperature of the printing ink to vaporize the printing ink. To manufacture a board having a smooth surface and having lines and patterns by a simple method of diffusing and penetrating the printed surface into the inside of the board.

[Example] An example of the method for manufacturing a lighting board according to the present invention will be described in detail below. First, 160℃
Using printing ink containing a sublimable dye that vaporizes at a temperature of ~200°C, as shown in the figure, a checkerboard-like line 1, numbers 2 indicating the year and date, and a pattern 3 such as a small bird perched on a twig are printed. Print on paper. Next, this printed paper is placed on top of a thin iron plate whose surface has been coated with a printing polyurethane paint, with the printed side facing each other. Then, by heating and pressurizing at a temperature of 215° C. to 230° C. and a pressure of 1 Kg/cm ² to 5 Kg/cm ² , the temperatures of the printing paper, the printing ink layer, and the paint layer rise rapidly. As the temperature rises, the dye present in the printing ink layer sublimates, becomes molecules, and flies out of the ink layer, and the jumped out dye molecules diffuse and permeate into the polyurethane paint layer to dye it. For this reason, lines 1, numbers 2, and patterns 3 are embedded in the paint layer with a slightly softer and deeper feel than when printed on paper, and the paint surface is smooth and has a hardness of approximately 9H pencil hardness. can do. In addition, line 1, number 2
In addition, it goes without saying that the design pattern 3 can be expressed by coloring it in any color.

In addition, the transparent polyurethane paint applied to the iron plate is not limited to colorless and transparent, but can be colored in the desired color tone, and if colored paint is used, it will have a unique contrast with the design pattern 3 etc. It is possible to express the beauty of Furthermore, if the surface of the iron plate is painted white or other color and then coated with transparent polyurethane paint, a writing board with a printing surface in the same color tone as a conventional whiteboard can be obtained. be able to.

By housing the board manufactured in this manner in the frame 4 as shown in the figure, it can be used as a writing board on which event schedules can be written.

[Effects of the Invention] As described above, according to the method for producing a writing board according to the present invention, a writing board with lines and designs embedded in a transparent coating film and having a smooth surface can be produced by sublimation. A simple method is used in which printing paper printed with printing ink containing dye is placed on top of an iron plate coated with transparent paint, and heated and pressurized to sublimate the dye, causing it to diffuse and permeate into the paint layer. Because it is possible to
Work efficiency is significantly improved compared to conventional methods, and production costs can be reduced. Moreover, since there is no problem with wastewater treatment, there are no worries about pollution such as river pollution, and other beneficial effects are achieved.

[Brief explanation of the drawing]

The figure is a perspective view showing one embodiment of the present invention. 1... Line, 3... Design pattern.

Claims (1)

[Scope of Claims] 1. Printing paper printed with lines or desired designs using printing ink containing sublimable dye is stacked with the printed side facing an iron plate coated with transparent polyurethane paint on the surface. At the same time, the printing ink is heated and pressurized to the sublimation temperature of the printing ink to vaporize it, and the printed surface is diffused and permeated into the polyurethane paint, thereby producing a writing board with a smooth transparent coating film formed on the surface. Method. 2. The method for manufacturing a lighting board according to claim 1, wherein the transparent polyurethane paint applied to the iron plate is colored. 3. The method for manufacturing a lighting board according to claim 1, characterized in that the surface of the iron plate is colored in advance and a transparent polyurethane paint is applied thereto.