JP2012081680A - Method of printing on solid medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems of firstly seeking for a conspicuous advertising medium such as an advertising sheet or curtain-like signboard put in front of a store, first of all, due to the necessity to get a person to look at it, regardless of such an attempt as to improve images of goods and the store and of introduction of new products by printing it in a variety of ways, and of demanding a low-cost, running-cost-free and impact-giving one.SOLUTION: A printing primer for polypropylene is coated on the lens side of a polypropylene solid sheet, an ink receiving layer is formed on it, and surface printing is performed further on it by an inkjet printer.

Description

  The present invention relates to a printing method on a three-dimensional medium.

  The three-dimensional medium is a plastic sheet, which is thicker than the thickness due to the optical illusion.

On advertising media, for example, advertising sheets and curtain signs placed in front of stores, various types of printing are performed to improve the image of products and stores and introduce new products. In such a signboard, first of all, it is first required to be eye-catching because it must be seen.
For this reason, various ideas have been made such as lighting, blinking it, and making sounds.

  Such large items are naturally very effective, but they are expensive and cannot be easily replaced. I want to achieve great results at a low price.

  In view of this, there has been a demand for an inexpensive product that does not require running costs and that has a great impact.

  In view of the present situation as described above, the present inventor has completed the printing method for the three-dimensional medium of the present invention as a result of diligent research, and the feature is that the printing for polypropylene is performed on the lens side of the three-dimensional sheet made of polypropylene. A primer is coated, an ink receiving layer is formed on the primer, and surface printing is performed on the surface with an ink jet printer.

Here, the three-dimensional sheet is a thin sheet (for example, about 0.2 to 1 mm), but the depth is felt and it looks like a translucent thick (about 5 to 10 mm) sheet. Say things.
As an example of such a sheet, a large number of lenses (protrusions like a hemisphere: diameter 0.05 to 0.2 mm, height 0.03 to 0.2 mm) on one surface of a transparent plastic sheet , And the other surface is provided with irregularities that appear as bottoms or thin bottom printing. Some have lenses on both sides.
The multiple lenses are regularly aligned.

  Such a three-dimensional sheet is usually printed on the opposite side of the lens, and the depth is felt when viewed from the lens side.

  The three-dimensional sheet referred to in the present invention is made of polypropylene. This is because it is inexpensive and easy to manufacture.

  A polypropylene printing primer is coated on the lens side of a three-dimensional polypropylene sheet. This is because polypropylene is difficult to print as it is. This primer may be a commercially available one such as chlorinated polypropylene.

A primer is coated on the lens side, and an ink receiving layer is formed thereon. This is to increase the ink absorbency and may be a normal one. For example, those based on polyvinyl alcohol, protein, and other resins.
In short, a material having good adhesiveness and good affinity with water-based ink is preferable.

  Printing is performed on the receiving layer. The printing may be characters, patterns or any other type. Since this printing is viewed from the lens side, it is necessary to print as such. Usually, printing is performed on the side opposite to the viewing side (back side), and the printed matter is viewed through the lens.

  Since the surface printing is performed on the lens side and viewed from the printing surface side, the printed matter does not look three-dimensional at all. It is a normal printed matter. However, the portion other than the printed surface looks thick, that is, the thick bottom portion appears as a translucent and thick sheet. In the bottom portion, the above-described unevenness and thin bottom printing appear translucent.

  Surface printing is performed with an inkjet printer. This is because every company has it at home, and it can be printed easily. Up to now, three-dimensional printing has not been done easily, such as printing between sheets, which must also be offset printing.

The present invention has the following great advantages.
(1) Since printing is performed on the lens side, there is no difficulty such as reverse printing or printing at an intermediate position of the film.
(2) Easy printing with inkjet printers at any company or home.
(3) Despite being simple, the impact of being a three-dimensional sheet is great.
(4) Ideal for brochures and billboards.

It is sectional drawing of the medium printed by the method of this invention.

  Hereinafter, the present invention will be described in more detail based on preferred examples.

  FIG. 1 is a schematic sectional view showing an example of the printing method of the present invention. FIG. 1A is a cross-sectional view of the three-dimensional sheet 1. In this figure, the upper side is the front and the human side. Many lenses are constructed on the front side. These lenses are usually molded integrally with the sheet. Concavities and convexities are also formed on the back side. This shows different things through the lens to the right and left eyes, thereby creating the illusion that it is in the back. Therefore, the sheet is recognized to be thick.

A transparent printing primer 2 for polypropylene is applied to the front side. This is for improving the adhesion of the printing ink. The primer itself may be a material such as chlorinated polypropylene, and may be any commercially available or new one. The application thickness of the primer may be as usual.
Next, an ink receiving layer (transparent or translucent) is formed thereon (a resin or the like that becomes the ink receiving layer is applied). This is for facilitating ink absorption and preventing bleeding. In the figure, the receiving layer is omitted.
These are for the purpose of improving printing characteristics, and are intended to enable easy printing even without a printing company or specialist.

After forming (coating) the receiving layer, only surface printing 3 is performed with an ink jet printer. The surface printing is a main purpose expressed by the three-dimensional medium of the present invention, and is a character, a pattern or the like.
When the surface printing is thin, the bottom portion (a portion that looks like a deep bottom portion) may be seen through. Thereby, the thickness is emphasized as a whole.
Since it is transparent, surface printing can be performed on the entire surface.

Further, when it is desired to prevent the surface printing from being seen through, the surface printing portion may be subjected to base printing (such as white printing with a large concealment rate).
Since the printing portion is not transparent, the three-dimensional effect disappears when the entire surface is printed, and thus partial printing is performed. For example, 20 to 50% of the total area is printed.

1 Three-dimensional sheet 2 Primer 3 Surface printing

Claims (2)

A method for printing on a three-dimensional medium, comprising: coating a polypropylene printing primer on a lens side of a three-dimensional sheet made of polypropylene; forming an ink receiving layer thereon; and then printing the surface with an ink jet printer. 2. The method for printing on a three-dimensional medium according to claim 1, wherein concealment base printing is performed in advance on a portion to be surface printed by an ink jet printer.

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