JPH04102869U - Rubber print for quick-drying oil-based ink - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a rubber printing body that can be clearly printed without slipping when printing on a non-absorbing surface using a quick-drying oil-based ink. [Structure] The surface layer of the rubber printed body made of natural rubber or synthetic rubber has a depth of 0.01 to 0.3 mm and a maximum diameter of 0.01 to 0.3 mm.
Rubber print for quick-drying oil-based ink with 1mm unevenness.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a quick-drying rubber print body for oil-based ink.

0002

[Conventional technology]

Conventionally, the printing surface of the rubber printing body was made uneven or only the printing surface layer of the rubber printing body was multiplied. Inventions and ideas for making a porous material, improving the adhesion of ink to the stamp pad, and making clear stamps. There are many ideas.

0003 For example, Utility Publication No. 47-15281, Utility Publication No. 35-13005, Special Publication No. 59 -14358, Japanese Patent Publication No. 2-6633, etc. are known. In Utility Model Publication No. 47-15281 and Utility Model Publication No. 35-13005, the surface layer By providing a recess, the ink is retained in the recess, and when the seal is printed, the surrounding area is Avoid causing excessive ink build-up on the edges. Especially for printing on non-absorbent surfaces. Excellent in some cases. However, when attached to a machine and stamping, the ink build-up phenomenon occurs. Prevention is important, but for stamps that are stamped by hand, it is important to prevent Since the ink is a quick-drying oil-based ink, it is easy to slip and is difficult to stamp. points are occurring.

0004 Furthermore, in Japanese Patent Publication No. 59-14358, the surface layer of the printed body is 0.01 to 0. It is a porous body with a diameter of 1 mm and a thickness of about 0.15 mm, making it highly durable. However, when printing on a non-absorbing surface, it is not possible to print clearly without slipping. In addition, in Japanese Patent Publication No. 2-6633, a porous layer with a thickness of 0.05 to 0.5 mm is It is placed on the printing surface and can be clearly stamped, but it uses quick-drying oil-based ink and is non-stick. When imprinted on the absorbent surface, it tends to slip, so this is not a solution. That is, many Because it is a porous material, the quick-drying oil-based ink is immediately impregnated into the porous material, and the non-absorbing surface is When you print on the surface, the porous material acts as a suction pump and removes the ink that has moved to the non-absorbing surface. It has the disadvantage that a clear stamp cannot be obtained because it is absorbed again when the stamp is finished. Furthermore, I The ink sticks to the stamping surface, and when the printing body is removed from the stamping surface, an unpleasant sticky sound is generated.

[0005]

[Problem that the invention attempts to solve]

This invention uses a rubber-printed stamp, uses quick-drying oil-based ink, and uses a non-absorbent surface. When printing on paper, quick-drying oil-based ink is interposed between the non-absorbent surface and the rubber print body. The rubber print body is slippery and cannot be stamped clearly. In addition, the rubber printed body and the non-absorbing surface This prevents the generation of adhesive noise due to the adhesiveness of the ink.

[0006]

[Means to solve the problem]

In the present invention, irregularities of 0.01 to 0.3 mm are formed on the printing surface of the rubber printed body.

[0007]

[Effect]

The unevenness of the printing surface of the rubber printing body comes into direct contact with the non-absorbing surface, and the quick-drying oil-based ink The appropriate amount of ink is retained by capillary force, making it possible to print clearly without slipping.

[0008]

【Example】

Hereinafter, embodiments of the present invention will be described in detail. The manufacturing process of the rubber printed body of the present invention is as follows. Natural rubber, chloroprene rubber, styrene butadiene rubber, acrylonitrile butadiene rubber, ethylene propylene rubber, ethylene propylene terpolymer, etc. can be used as the rubber stamp material. Next, as the master, a master (intaglio) made of aluminum, iron, phenol resin, urea resin, etc. can be used. Using sand with a particle size of 1/2 to 1/5 of the width of the thinnest character line on the master, sandblasting is applied to the surface of the master to a depth of 0.01 to 0.03 mm and a diameter of 0.01 to 0. .0 Form a 3mm recess uniformly. Next, the master is kept at a temperature of 130 to 180°C, filled with unvulcanized rubber stamp material, and heated under pressure of 50 to 100 kg/cm ² for 5 to 15 minutes to a depth of 0.01 to 0.03 mm on the surface. A printed body A is obtained in which concave portions having a diameter of 0.01 to 0.03 mm are uniformly formed.

[0009]A rubber printed body of Example 1 of the present invention is shown in FIGS. 1 and 2. A is a rubber printed body, its material is natural rubber, its surface 1 is uneven with a depth d of 0.01 to 0.03 mm, and its maximum diameter h is 0.01 to 0.03 mm. Rubber printed body A had a JIS hardness of 45 and a thickness of 6 mm. Example 2 Using acrylonitrile butadiene rubber, a phenol master was processed by sandblasting with sand having a particle size of 0.01 mm, heated and pressed at a temperature of 150°C and a pressure of 100 kg/cm ² for 5 minutes to obtain a JIS hardness of 60. Thus, a printed body with unevenness of 0.01 mm depth, maximum diameter of 0.05 mm, and thickness of 5 mm was obtained on the surface of the printed body. Next, using ethylene propylene terpolymer and 0.02 mm sand, an aluminum master disk was processed in the same manner as in Example 2, and then heated and pressed at a temperature of 160°C and a pressure of 110 kg/cm ² for 8 minutes. Thereafter, a printed body of Example 3 having a JIS hardness of 65, a surface of the printed body having irregularities of 0.04 mm in depth, a maximum diameter of 0.06 mm, and a thickness of 5.5 mm was obtained. Example 4 Acrylonitrile rubber was used as a rubber stamp material, and two types of rubber stamps having JIS hardnesses of 45 and 60 were prepared in advance after pressure vulcanization at a temperature of 150° C., a pressure of 5 kg/cm ² , and a time of 5 minutes. Next, the thick plate of Example 2 was used as the thick plate, and a 1 mm thick unvulcanized rubber sheet with a JIS hardness of 45 after vulcanization was placed on top of a 1 mm thick unvulcanized rubber sheet with a JIS hardness of 45 after vulcanization. A 4 mm unvulcanized rubber sheet was placed on it and heated under pressure for 6 minutes at a temperature of 145°C and a pressure of 120 kg/cm ² to produce a printed body with a thickness of 4 mm and the same printed surface as in Example 2, but with the hardness shown in Figure 3. A printed body with two different layers was obtained. The thickness of the layer 2 having a JIS hardness of 60 and the layer 3 having a JIS hardness of 45 can range from 0.5 to 1.5 mm and from 2.0 to 5.0 mm.

0010 Next, the printed material in each example was held in a holder, a stamping test was performed, and the results were The results are shown in Table 1 for clear imprintability and Table 2 for degree of slippage.

[0011]

[Table 1]

0012

[Table 2]

[0013] As a comparative example, a printed body without surface depressions in each example was created under the same conditions. did. Examples of ink include the ink of Japanese Patent Publication No. 31-4322, quick-drying oil-based ink, etc. It was tested as The stamp pad is impregnated with ink such as Japanese Patent Publication No. 51-39574, and non-stamped items are printed. The degree of slippage and the clear impression due to the concave portions on the surface of the printed body were visually judged. Print type The size was tested in 11th grade and 24th grade, and Mincho font. In each table, clear stamps are not available. The ones that are written are ****, the ones that have some shading in some places are **, the ones that are partially illegible *, The degree of slippage is as follows: one that is difficult to stamp smoothly*, one that can be stamped without slipping**, It was expressed as

[0014]

【effect】

As mentioned above, the surface of the printed body is coated to a depth of 0.01 to 0.3 mm and a diameter of 0.01 to 0.1 mm. It is a rubber print body for using quick-drying oil-based ink with uniformly formed recesses of mm. This allows the ink to be contained in the recesses, so when printing on non-absorbing surfaces, it is difficult to Clear stamps can be made without blurring. Moreover, no unpleasant sticky sound is generated.

[Brief explanation of drawings]

[Figure 1] Perspective view of the present invention

[Figure 2] Enlarged sectional view of the present invention

[Fig. 3] Enlarged sectional view of Embodiment 4 of the present invention

[Explanation of symbols]

A Rubber print b depth h Maximum diameter

Claims (1)

[Scope of utility model registration request] Claim 1: A rubber printed body for quick-drying oil-based ink, characterized in that the surface layer of the rubber printed body made of natural rubber or synthetic rubber has an unevenness of 0.01 to 0.3 mm.