JP3338483B2 - Screen printing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for printing a printed matter in which desired characters and other patterns are seen or disappeared depending on the angle between the printed matter and the viewpoint. This printed matter is used for labels, stickers, markings, interior and exterior. It can be used as a film or sheet, an adhesive tape or the like.

[0002]

2. Description of the Related Art A hologram is known as a graphic in which a desired pattern looks three-dimensional. However, holograms are limited in materials such as the necessity of using transparent plastics, metal-deposited films, and the like, and the size of graphics is also limited, making it difficult to use them for graphics with a large area. Magnetic printing is known as a method of expressing a three-dimensional graphic, but in this method, a special device or tool is required because an operation of applying magnetism is required at the time of printing or after printing.
Further, there is a limitation that a metal that acts on magnetism must be used as a component of the printing ink. JP-A-61-842
No. 80 describes a method of manufacturing a three-dimensional print using a halftone ink, which tends to produce shadows, by placing a plate on which a predetermined pattern is formed on a face plate of a screen printing machine. However, in the printed matter obtained by this method, the printed pattern does not appear or disappear depending on the angle between the printed matter and the viewpoint.

[0003]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a printing method capable of producing a printed matter in which the printed pattern is seen or disappeared, preferably three-dimensionally, depending on the angle between the printed matter plane and the viewpoint. Is provided.

[0004]

The present inventors have studied to solve the above-mentioned problems, and as a result, have found that light-reflective flaky particles having a hiding power of 15,000 cm ² / g or less or an average particle diameter of 5 μm or more. Is formed on the printing substrate with an ink or paint containing 5 to 60% by weight on a solid basis, so that the pattern is not visible near a certain angle between the printed surface and the viewpoint, The inventors have found that a three-dimensional pattern appears at an angle different from this, and have completed the present invention.

Accordingly, the present invention is to dispose a plate having a desired pattern on a face plate of a screen printing machine, overlay a printing base material thereon, and bring the printing base material into close contact with the face plate or plate of the printing machine. And then performing screen printing with an ink or paint, wherein the ink or paint contains 5 to 60% by weight of light-reflective particles having a hiding power of 15,000 cm ² / g or less or an average particle size of 5 μm or more based on the solid content. Accordingly, there is provided a method for obtaining a printed matter in which the pattern is visually recognized or disappears depending on an angle between a printed matter plane and a viewpoint.

[0006]

According to the printing method of the present invention, a desired pattern is formed on the face plate (1) of the screen printing machine by the concave (3), convex (4) or notch (5) as shown in FIG. The printed plate (2) is placed thereon, and the printing base material (6) is brought into close contact with the plate (2), and then the ink or paint (7) containing light-reflective particles is attached by screen printing.
In this case, the ink or paint adheres thinly on the high level flats (8) on the surface of the printing substrate (6) and thickly on the low level flats (9). On the curved surface, the ink or paint adheres the thinnest at the curved surface portion that is convex upward as shown by (10) and the thickest at the curved surface portion that is concave upward as shown by (11). For this reason, when viewed from a certain direction with respect to the plane of the printed matter, substantially all (90% or more) of light is reflected by the flaky particles, which are tabular particles in the ink or paint, so that the printed pattern is Although difficult to visually recognize, when viewed from other angles, the density of the flaky particles appears depending on the thickness of the ink or paint layer, and in a portion where the flaky particles per area is relatively small, particles Light passes through the gap, is reflected on the lower surface of the printed matter, and a three-dimensional pattern is visually recognized. However, the visible angle and the non-visible angle depend on various factors, such as the number of light sources.

[0007]

DETAILED DESCRIPTION According to the method of the present invention, a plate (2) having a desired pattern is arranged on a face plate 1 of a conventional screen printing machine. The pattern on the plate is formed by indentations (3) or notches (5) formed in the table. The material of the plate is not particularly limited, but plastics, metal plates, ceramics, and the like are preferable.
Plates can also be made using a PVC film or the like. Further, the thickness of the plate is preferably 50 for easier printing and the like.
２００200 μm.

Next, a printing base material (6) is placed on the face plate (1) and the plate (2) of the screen printing plate, and the space between the base material (6) and the face plate (11) or the plate (2). Is adhered. This close contact and fixation can be performed using a common means, for example, a vacuum suction force. As the printing substrate (6), those commonly used in screen printing can be used, and examples thereof include a PVC film, a urethane film, and a polyester film. Next, screen printing, for example, silk screen printing, can be performed on the surface of the printing substrate (6) according to a conventional method. This printing method is described in detail in JP-A-61-84280.

The light-reflective particles contained in the ink or paint have a hiding power of 15,000 cm ² / g or less or an average particle size of 5 μm or more. 15,000cm ² /
When a light-reflective particle having a hiding power higher than g or a light-reflective particle smaller than 5 μm is used, the effect that the density of the ink is not clear and the light reflection state does not change even when the viewing angle is changed, and the pattern disappears or appears. Is not achieved. Incidentally, the hiding power means a covering area per unit weight and is defined as ASTM D96.
It can be measured according to 2-66.

Further, the average particle diameter of the particles means the major axis of the particles, which can be measured by an image processing device, a laser particle size distribution meter, an electron micrograph, or the like. Here, there are three reasons why the light-reflective particles are limited to the flaky particles in the present invention. First, the scaly particles have a flat plate shape,
This is because when printed on a printed material, it is likely to become a horizontal plane. Accordingly, the entire area of the printed matter can be covered with a small amount of addition, and a gap can be found between the particles depending on the angle, so that the effect of the present invention can be obtained.

The second reason is that it has a flat plate shape,
In addition, since they are arranged in a horizontal plane, the effect of totally reflecting light can be effectively obtained. Therefore, together with the above-mentioned reasons, the effects of the present invention are produced, and such effects cannot be obtained with spherical particles or needle-like particles. Further, the third reason is that the effect of the present invention can be obtained with a small amount of addition, which facilitates dispersion in the coating material, and that the sedimentation speed is slow because the shape is flat, so that an advantage in the process is obtained. Because there is.

Generally, in the dispersion of such particles, the density difference between the particles and the coating material is large, the dispersion stability is poor, and this is a major problem in the process. Examples of particles having the above-mentioned properties include, for example, aluminum powder, for example, sold in the form of aluminum paste by Toyo Aluminum Co., Ltd. as 1830YL; iron oxide powder, for example, PFO-1000 or PFO- from Sakai Chemical Co., Ltd.
Commercially available as 3000, commercially available as FOR, FOB, FOR-2 or FOR-3 from Dainichi Seika Kogyo; glass flakes on which metal is deposited, for example, 5150PS, 5090PS, 5 by Nippon Sheet Glass
030PS and the like; pearl pigments,
For example, from Merck, Iriodin 120, Iri
odin 150, Iriodin 173, Brig
ht White, Hi-Lite Blue or Fi
Ne commercially available as ne Blue.

As a result of the printing, as shown in FIG. 1, the thickness of the ink or paint is thin at the high level flats (8) and thick at the low level flats (9). Also,
On the curved surface, as shown by (10), it is thinnest at the portion convex upward, and it is thickest at the concave portion upward shown by (11). The thickness of the ink or paint layer is preferably between 2 μm and 50 μm. For this reason, when viewed from a certain angle with respect to the surface of the printed matter, the pattern is not visible due to the reflection of light by the light reflecting particles in the ink or paint,
When viewed from other angles, the pattern is observed three-dimensionally.

Further, as one application example, after printing is performed as described above, the mutual position between the printing base material and the plate is shifted, and printing is performed using candy tone ink. It is possible to obtain a graphic in which a pattern formed by ink or paint containing the light reflecting particles and a pattern formed by the candy tone ink alternately appear and disappear.

[0015]

Next, the present invention will be described more specifically with reference to examples. Embodiment 1 FIG. A 100 μm-thick plate having a notch pattern is arranged on a face plate of a screen printing machine, and a printing base material (Scotch Cal 3650 (manufactured by Sumitomo 3M)) is overlaid thereon, and various inks shown in Table 2 are used. The screen was printed by a screen printer, and the effect was confirmed with the naked eye. Those in which the printed pattern disappeared or appeared depending on the angle between the printing surface and the viewpoint were judged to be acceptable (OK), and those not being judged to be unacceptable (NG).

The ink to be used is shown in Table 1 on an ink base material (vinyl chloride, vinyl acetate type; manufactured by Seiko Advance Co., Ltd.).
The results shown in Table 2 were obtained by using the aluminum paste shown in Table 2 in an amount shown in Table 2. Table 1品 Product number Hiding power (cm ² / g) Manufacturer メ ー カ ー───────────────────── A 0215M 28000 All made by Toyo Aluminum B 1860YL 16000 C 1830YL 13000 D 7730N 13000 E 7130N 12000 F 76840NS 10000 G 1810YL 10000 H 1950M 2000 I 1109M 5000 J 1100M 8000 K 7430NS 9000 L HS-2 6000 M 46-046 4000 N 54-452 3000 O MG1000 4000 P MG500 5000 ───────────────────── ────────Table 2 Aluminum paste (weight% solid content ratio) ────────────────────────── Sample ABCDEFGHIJKLMNOP judgment ── ──────────────────────── 1 5 NG 2 10 NG 3 20 NG 4 40 NG 5 8 NG 6 10 NG 7 20 NG 8 45 NG 9 55 NG 10 8 OK 11 10 OK 12 20 OK 13 45 OK 14 60 OK 15 8 OK 16 15 OK 17 30 OK 18 60 OK 19 8 OK 20 10 OK 21 35 OK 22 58 OK 23 8 OK 24 10 OK 25 40 OK 26 8 OK 27 10 OK 28 30 OK 29 60 OK 30 8 OK 31 20 OK 32 40 OK 33 60 OK 34 4 NG 35 10 OK 36 15 OK 37 25 OK 38 40 OK 39 10 OK 40 20 OK 41 40 OK 42 10 OK 43 20 OK 44 40 OK 45 10 OK 46 20 OK 47 40 OK 48 10 OK 49 20 OK 50 40 OK 51 10 OK 52 20 OK 53 40 OK 54 10 OK 55 20 OK 56 40 OK 57 10 OK 58 20 OK 59 40 OK 60 8 15 5 NG 61 5 5 5 5 OK 62 3 3 3 3 OK 63 5 5 2 NG ──────────────────────────Example 2 The procedure of Example 1 was repeated. However, the iron oxide particles shown in Table 3 were used in the amounts shown in Table 4 as the light reflective particles, and the results shown in Table 4 were obtained.

Table 3品 Product name Average particle size (μ) Manufacturer ────────── ───────────────── A PFO-200 2 Sakai Chemical B PFO-1000 10 Sakai Chemical C PFO-3000 30 Sakai Chemical D FOR 5 Dainichi Seika Kogyo E FOB 5 Dainichisei Chemical Industry F FOR-2 8 Dainichi Seika Industries G FOR-3 12 Dainichi Seika Industries ───────────────────────────Table 4 Oxidation Amount of iron particles (% by weight solids) ───────────────────────── ABCDEFG judgment ─────── ────────────────── 1 10 NG 2 15 NG 3 20 NG 4 50 NG 5 3 NG 6 10 OK 7 20 OK 8 40 OK 9 50 OK 10 8 OK 11 10 OK 12 20 OK 13 40 OK 14 60 OK 15 8 OK 16 15 OK 17 30 OK 18 8 OK 19 15 OK 20 30 OK 21 8 OK 22 10 OK 23 20 OK 24 40 OK 25 8 OK 26 10 OK 27 20 OK 28 60 OK 29 10 5 N G 30 8 15 NG 31 20 20 OK ───────────────────────── Example 3 The method of Example 1 was repeated. However, glass flakes shown in Table 5 were used as light reflective particles in amounts shown in Table 6. Table 6 shows the results.

Table 5 ───────────────────────────── Product name Average particle size (μ) Manufacturer ──────── Ａ A 5150PS 150 Nippon Sheet Glass B 5090PS 90 Nippon Sheet Glass C 5030PS 30 Nippon Sheet Glass D 5060PS 60 Nippon Sheet Glass Prototype ─────── ──────────────────────Table 6 Amount of glass flakes (weight% solid basis) ──────────────── ─────── ABCD judgment ─────────────────────── 1 5 OK 2 10 OK 3 15 OK 4 20 OK 5 30 OK 6 3 NG 7 6 OK 8 15 OK 9 30 OK 10 5 OK 11 10 OK 12 20 OK 13 3 NG 14 5 OK 15 9 OK 16 15 OK 17 30 OK ────────────── Embodiment 4 The method of Example 1 was repeated. However, pearl pigments shown in Table 7 were used as light reflective particles in amounts shown in Table 8. Table 8 shows the results.

Table 7 ──────────────────────── Product name Particle size (μm) Manufacturer ───────────── Ａ A Iriodin 120 5〜20 MERCK B Iriodin 150 5〜100 MERCK C Iriodin 173 5〜60 MERCK D Bright White 6〜48 MEARL E Hi-Lite Blue 6〜 48 MEARL F Fine Blue 4 ~ 32 MEARL ────────────────────────Table 8 Amount of pearl pigment (% by weight based on solid content) ──────── ────────────────── Sample ABCDEF judgment ──────────────────────── ── 1 3 NG 2 5 OK 3 15 OK 4 30 OK 5 5 OK 6 10 OK 7 20 OK 8 45 OK 9 55 OK 10 5 OK 11 10 OK 12 20 OK 13 45 OK 14 60 OK 15 5 OK 16 15 OK 17 30 OK 18 60 OK 19 5 OK 20 10 OK 21 35 OK 22 58 OK 23 5 OK 24 10 OK 25 40 OK ─────────────────────か ら Based on the above results, the viewing angle when using an ink or paint containing 5% by weight or more of light-reflective particles having a hiding power of 15,000 cm ² / g or less or an average particle of 5 μm or more based on the solid content. It can be seen that a print pattern that disappears or appears is obtained.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view schematically showing a printing method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Face plate of screen printing machine 2 ... Pattern plate 3 ... Concave part of plate 4 ... Convex part of plate 5 ... Notch part of plate 6 ... Printing base material 7 ... Ink or paint containing light reflective particles

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B41M 1/12 B41M 1/22 B41M 3/00

Claims (3)

(57) [Claims] 1. A plate having a desired pattern of irregularities or cutouts is arranged on a face plate of a screen printing machine, and a printing base material is superimposed thereon, and the printing base material and the screen printing machine face plate or plate are In a screen printing with an ink or a paint after adhering, the light-reflective flaky particles having a hiding power of 15,000 cm ² / g or less or an average particle diameter of 5 μm or more in the ink or the paint on a solid content basis. A method of obtaining a printed matter in which the pattern can be visually recognized or disappears depending on the angle between the printed matter plane and the viewpoint by adding 5 to 60% by weight. 2. The method according to claim 1, wherein the light-reflective flaky particles are aluminum powder, iron oxide powder, metallized glass flake, or pearl pigment. 3. The printed pattern has a thickness of 2 μm to 5 μm.
The method according to claim 1, wherein the thickness is 0 μm.