JPH11138960A - Stamp material for ink-permeable stamp and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stamp material for an ink-permeable stamp which enables easy confirmation of the upper and the lower side and the right and the left side of a stamp face part by making clear the color contrast between the printing face part and a recessed face part, and provide also a method for manufacturing the printing material. SOLUTION: This stamp material for an ink-permeable stamp is composed of an inorganic or/and a metallic pigment with glare protecting properties and a thermoplastic resin or elastomer kneaded at a specified ratio. The glare protecting properties are imparted to the masked part of the stamp material by applying a thermal masking treatment. This mixing ratio is 4-5 parts of the organic pigment to 10 parts of the inorganic or/and the metallic pigment with glare protecting properties, and 10-20 parts of the mixed pigment to 100 parts of the thermoplastic resin or elastomer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stamping material for an ink-penetrating stamp and a method for producing the stamp material. More specifically, the contrast between a portion having a light-shielding property and a portion having an excellent ink-penetrating property by thermal masking is sharp. The present invention relates to a stamp material for an ink-penetrating stamp to be distinguished and a method of manufacturing the stamp material.

[0002]

2. Description of the Related Art An ink-penetrating stamp that can be continuously used without using a stamp pad is based on a stamping material made of an open-cell body, and a heated member is pressed into a concave portion of a stamping surface. The surface is depressed and softened by heat to close the open cells necessary for ink penetration, and the other parts not heat-pressed, that is, the ink-penetrating protrusions, form the desired characters and designs, etc. It is something that you get. The ink-penetrating stamp manufactured in this manner is generally called a heat-masking type penetrating stamp, and has advantages such as easier processing of the ink surface portion and a smaller number of manufacturing steps than the conventional letterpress type penetrating stamp. Have.

A stamping material used as a material of the ink-penetrating stamp is made of various thermoplastic resins, and a foaming agent for forming continuous cells through which ink can penetrate, and a coloring agent for confirming the kind of the stamping material and the like. It is manufactured by mixing an organic pigment or the like which will be described below. The obtained printing material is constituted as an open-cell body, and by impregnating the ink, the ink permeates the printing surface to enable continuous printing.

[0004]

However, when a thermal masking type ink-penetrating stamp is impregnated with ink for use, regardless of the color (for example, red or black) of the impregnated ink, the ink-imprinted stamp is imprinted on the stamped surface. It is something that penetrates and looks dark. In addition, even in the concave portion where the surface is softened by the heat treatment and the ink has been cut off, the color of the ink is transmitted through the concave portion and looks blackish as in the case of the stamped surface. That is, it is pointed out that both the stamp face and the concave face part become black as a whole, and the upper, lower, left and right sides of the stamp cannot be determined.

[0005] Further, the heat masking type infiltration stamp is also used as a printing plate of a printing machine having a rotary mechanism. Hands and the like may be stained with ink, and in some cases, the stamp surface may be damaged, making the stamp itself unusable.

[0006] In addition, since the ink penetrating stamp is used by impregnating the ink into the open cells in the stamp material, it is necessary to replenish the ink according to the frequency of use. In this case, the replenishment of the ink causes the surface of the printing material to be further colored, making it difficult to confirm the up, down, left, and right of the stamp.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned drawbacks inherent in the prior art, and has been proposed in order to preferably solve the problem. The object of the present invention is to provide a stamping material for an ink-penetrating stamp and a method for manufacturing the stamping material, in which the upper and lower sides and the right and left of the stamping surface can be easily confirmed.

[0008]

In order to overcome the above-mentioned problems and achieve the intended object, a stamp material of the present invention comprises an inorganic or metal pigment having a light-shielding property, a thermoplastic resin or an elastomer. Are kneaded at a predetermined ratio, and by applying a thermal masking treatment, a light-shielding property is imparted to the masked portion.

[0009] In order to overcome the above-mentioned problems and achieve the intended object, a stamping material according to another invention of the present application comprises a light-shielding inorganic or / and metallic pigment and an organic pigment at a predetermined ratio. It is characterized in that a mixed pigment obtained by mixing and a thermoplastic resin or elastomer are kneaded at a predetermined ratio, and a light-shielding property is imparted to the masked portion by performing a heat masking treatment.

[0010] In order to overcome the above-mentioned problems and achieve the intended object, a method of manufacturing a stamp material according to still another invention of the present application comprises an inorganic or / and metallic pigment having a light-shielding property, a thermoplastic resin or It is characterized in that it is kneaded with an elastomer at a predetermined ratio.

In order to overcome the above-mentioned problems and achieve the intended object, a method for producing a stamp material according to still another invention of the present application comprises an inorganic pigment and / or a metal pigment having a light-shielding property, and an organic pigment. Is mixed with a thermoplastic resin or an elastomer at a predetermined ratio.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a stamping material for an ink-penetrating stamp and a method of manufacturing the stamping material according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments. The printing material according to the preferred embodiment is mainly composed of a thermoplastic resin or elastomer, and is mixed with a light-shielding inorganic or metal pigment at a predetermined ratio. In the present example, ethylene-α olefin copolymer (trade name TAFMER manufactured by Mitsui Petrochemical Co., Ltd.) or ethylene vinyl acetate copolymer (trade name Ultracene UE631 manufactured by Toyo Soda Kogyo Co., Ltd.) as the main raw material, Titanium white, calcium carbonate, brass or aluminum powder is preferably used as the light-shielding pigment.

FIG. 1 shows a permeation stamp 10 manufactured from a stamp material according to the present embodiment.
It comprises a stamped surface portion 12 for leaching ink 2 for transferring a predetermined character or pattern onto a material to be stamped such as paper, and a concave surface portion 14 from which the ink 2 does not exude. As shown in FIG. 2, the permeation stamp 10 has a large number of open cells 18 communicating with each other in the form of a mesh therein, and the ink 2 reaches the stamped surface section 12 through the open cells 18. The concave portion 14 is softened by the heat masking process to form the concave softened portion 16.
8 is not open to the surface of the printing material, and therefore the ink 2 impregnated in the open-cell body does not exude to the surface of the concave portion 14. The height difference between the stamp surface portion 12 and the concave surface portion 14 is about 0.2 mm.
Is processed to have a thickness of about 0.02 to 0.05 mm.

FIG. 3 and FIG. 4 are flow charts showing the manufacturing steps of the stamp material according to the preferred embodiment. In both cases, a pigment, a pore agent, and an elution aid are basically kneaded with the raw material to form a molded product, and then the pore agent is eluted and removed from the molded product to form an open cell therein. Things. The printing material manufactured in the examples is, for example, 100 parts of Tuffmer (trade name, manufactured by Mitsui Petrochemical Co., Ltd.), and 10 parts of an inorganic pigment titanium white and 5 parts of an organic pigment for imparting light-shielding properties are added. Is kneaded so as to be completely dispersed in the raw materials. Thereafter, 150 parts of sodium chloride as a pore-forming agent for making the stamping material into a continuous pore body, and glycerin 8 as an elution aid for assisting dissolution of the pore-forming agent
0 parts are sufficiently kneaded with heating so as to be completely dispersed. Then, the kneaded product is poured into a mold as needed, and solidified by natural cooling to obtain a molded product having a predetermined shape.

Next, the pore agent contained in the molded article is extracted and removed from the molded article with water or hot water so that continuous pores are present inside the molded article. After the molded product subjected to this elution treatment is sufficiently washed with water or the like, the water or the like inside or on the surface of the molded product is completely dried. Upon completion of this series of operations, a stamping material having a number of continuous pores 18 communicating with the surface therein and exhibiting a white color with titanium white and having a light shielding property is obtained. A method for manufacturing a stamping material that can shorten the process by simultaneously kneading the pigment, the foaming agent, and the dissolution aid into the raw material can be similarly implemented (see FIG. 4).

In this embodiment, titanium white is used as a pigment for imparting light-shielding properties to the stamp material. In this case, the stamped surface portion 12 which permeates the ink and exhibits a black color clearly emerges from the white concave surface portion 14, and the contrast between the two becomes remarkable. This coloration is not limited to white,
For example, by using a metal pigment such as gold or silver, it is possible to obtain a printing material having a light shielding property and exhibiting a color according to the user's preference.

[0017]

As described above, according to the stamping material for an ink-penetrated stamp and the method of manufacturing the stamping material according to the present invention,
Since a pigment having a light-shielding property is contained in the stamp material, the color development of the ink is blocked except for the stamp surface portion for transferring characters, designs, and the like, and therefore, the clear surface between the stamp surface portion through which the ink penetrates and the other concave surface portion. Color contrast, that is, clear contrast can be obtained. Also, since the contrast between the two is clear, the top and bottom and left and right of the stamp are clear, the work load of the worker when attaching and confirming the stamp is greatly reduced, and the transfer of the stamp due to the mistake of attaching the stamp is further reduced. Failure and damage to the stamp itself can also be avoided. In addition, since the coloring material can be colored according to the user's preference, the variation as a product can be increased.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a stamp material according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view illustrating a main part of the stamp material according to the embodiment of the present invention.

FIG. 3 is a flowchart illustrating a manufacturing process of the stamp material according to the embodiment.

FIG. 4 is a flowchart illustrating a manufacturing process of the stamp material according to the embodiment.

Claims (6)

[Claims] An inorganic or / and metallic pigment having a light-shielding property and a thermoplastic resin or elastomer are kneaded at a predetermined ratio, and subjected to a thermal masking treatment so that the masked portion is formed. A stamping material for an ink-penetrating stamp, which is provided with a light-shielding property. 2. A kneaded mixture of an inorganic or / and metallic pigment having a light-shielding property and an organic pigment at a predetermined ratio and a thermoplastic resin or elastomer at a predetermined ratio. A printing material for an ink-penetrated stamp, wherein a light-shielding property is imparted to the masked portion by performing a heat masking process. 3. The mixing ratio is such that the ratio of the organic pigment is 4 to 5 parts with respect to 10 parts of the inorganic or / and metal pigment having the light shielding property, and 100 parts of the thermoplastic resin or elastomer. The ratio of the mixed pigment is 10 to
The stamp material for an ink-penetrating stamp according to claim 2, which is 20 parts. 4. A method for producing a stamping material for an ink-penetrating stamp, comprising kneading an inorganic or / and metallic pigment having a light-shielding property and a thermoplastic resin or elastomer at a predetermined ratio. 5. A mixed pigment obtained by mixing an inorganic or / and metallic pigment having a light-shielding property and an organic pigment at a predetermined ratio, and a thermoplastic resin or elastomer at a predetermined ratio. A method for producing a stamp material for an ink-penetrated stamp. 6. The mixing ratio is such that the ratio of the organic pigment is 4 to 5 parts with respect to 10 parts of the inorganic or / and metal pigment having the light-shielding property, and 100 parts of the thermoplastic resin or elastomer. The ratio of the mixed pigment is 10 to
The method for producing a stamp material for an ink-penetrating stamp according to claim 5, wherein the number of the stamp materials is 20 parts.