JP4634162B2 - Endless printing belt for rotation marking - Google Patents

Description

  The present invention relates to an endless printing belt made of a porous printing material having open cells for use in a rotary stamp of a built-in ink type.

Rotation marks using an endless printing belt using a porous printing material having open cells as disclosed in Japanese Utility Model Publication No. 47-36413, Japanese Utility Model Application Laid-Open No. 2-29758, etc. Since it can be built-in, it can be stamped continuously without using ink every time it is used, which is very useful.
However, the rotation mark of the Japanese Utility Model No. 47-36413 type requires a rotation auxiliary tool called a rotator in order to rotate the endless print belt. However, as described above, the endless print belt is porous and has ink. Because of the built-in, the rotor and the endless print belt are liable to slip. Moreover, since the rotor has a circular shape with a certain size, there is a drawback that the entire rotation mark becomes large.
On the other hand, the rotation mark of the actual Kaihei 2-29758 type has the knob fixed to the endless printing belt, so the endless printing belt itself does not slip, but the knob must be exposed to the outside. There was a drawback that the entire mark became large.

Japanese Utility Model Publication No. 47-36413 Japanese Utility Model Publication No. 2-29758

  The present invention relates to an endless print belt using a porous printing material having open cells used for a rotation mark, and the endless print belt containing ink rotates without slipping when the rotation mark is used. Further, it is an object of the present invention to provide an endless print belt that can obtain a rotation mark having a configuration that does not use a rotor or a knob and can reduce the overall rotation mark.

Reinforce the back of the porous thermoplastic resin with a lithographically printed surface using a mirror image character consisting of numbers, alphabets, etc. as the ink exudation part and a non-ink exudation part as the non-ink exudation part. A porous stamping material,
A rubber member formed by reinforcing the back surface of the rubber in which a normal image character corresponding to the mirror image character is formed in a convex shape with a base fabric made of a woven or knitted fabric or a nonwoven fabric,
An endless printing belt for rotating stamps, wherein the rubber member normal image characters corresponding to mirror image characters of the porous stamp material are coupled to face each other.

The endless printing belt of the present invention has a porous printing material in which the back surface is reinforced with a base fabric and a mirror image character is formed on the surface with a porous thermoplastic resin, and a normal image character is formed on the surface with the back surface reinforced with a base fabric. A rubber member is an endless printing belt formed by coupling a mirror image character and a normal image character so as to face each other as shown in FIG. 1 described later, and is used as a rotation mark as shown in FIG. 2 described later. Since the convex image of rubber can be directly rotated with a finger or the like, the endless print belt will not slip, and since no rotor or knob is used, the entire rotation mark can be slimmed. .
In addition, when using a conventional rotation mark, it was difficult to confirm the position because the desired date and the like were selectively aligned while holding the handle of the rotation mark and looking into the marking surface. However, since the characters made up of numbers, alphabets and the like formed on the endless printing belt are mirror images rather than normal images, it is difficult to visually recognize the endless printing belt of the present invention. And the convex normal image character for rotation are opposed to each other, so that it is possible to easily position a desired character on the stamping surface only by confirming the normal image character.

Hereinafter, the present invention will be described with reference to the drawings.
In FIGS. 1 and 2, reference numeral 100 denotes an endless printing belt for rotational marking, which is configured by combining a porous marking material 110 and a rubber member 120.

The porous printing material 110 is a lithographic printing material in which the unevenness of the ink exudation portion and the non-ink exudation portion is about 0.01 mm to 1.0 mm, and the back surface of the porous thermoplastic resin is woven. Reinforced by a base fabric made of knitted fabric or non-woven fabric. Specifically, a thermoplastic resin, a water-soluble organic solvent, a water-soluble bubble forming agent, and an additive blended at appropriate ratios and kneaded are molded into a plate shape, and then a base fabric made of woven or knitted fabric or nonwoven fabric. A porous stamping material produced by stacking and storing in a die and pressurizing and heating to obtain an integrated sheet body, and then washing the water-soluble organic solvent and the water-soluble bubble-forming agent from the sheet body After forming a stamping surface as required, it is manufactured by cutting to a required size.
As a method of forming the marking surface, a method of directly pressing a heated mold to melt the blank portion, a method of directly heating and melting the blank portion with a thermal head, and various laser beams such as a carbon dioxide laser and a YAG laser are used. A method of heating and melting the blank portion, a method of heating and melting the blank portion with an infrared xenon flash lamp with an exothermic material, etc. can be used. The marking material is left without being melted to form the ink extruding portion 111, and the thermoplastic resin of the portion corresponding to the margin is melted and solidified to form the printing surface as the non-ink exuding portion 112 where the ink cannot exude.
The thermoplastic resin that can be used for the porous printing material is polyethylene, polypropylene, polybutylene, polyurethane, poly-1,2-butadiene, ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-vinyl acetate copolymer. Coalescence, acrylic acid methyl ester, acrylic acid ethyl ester, acrylic acid propyl ester, acrylic acid butyl ester, polystyrene, polyvinyl chloride, polyester, polycarbonate, polyethylene thermoplastic elastomer, polypropylene thermoplastic elastomer, polybutylene thermoplastic elastomer, These include thermoplastic resins such as polyurethane-based thermoplastic elastomers, polystyrene-based thermoplastic elastomers, polydiene-based thermoplastic elastomers, and polychloride-based thermoplastic elastomers. Can. The thermoplastic resin preferably has a melting point of 40 ° C to 250 ° C. Among the thermoplastic resins, polyethylene, polypropylene, polyethylene-based thermoplastic elastomers, and polypropylene-based thermoplastic elastomers are most preferably used from the physical aspects such as weather resistance, chemical resistance, and moldability.
In addition, as a water-soluble organic solvent that can be used for the porous printing material, ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, glycerin, and the like can be used. it can. Moreover, as a water-soluble foam forming agent, alkali metal salts, such as sodium chloride and calcium chloride, can be used, and those having a particle diameter of 2 to 100 μm are preferably used. If necessary, a coloring and heating material fine powder that absorbs infrared rays and generates heat, such as carbon black, an organic pigment, and a pearl pigment, may be added as an additive.

Examples of the water-soluble foam-forming agent that can be used for the porous printing material include fine powders such as salt and sugar.
The salt is an inorganic compound that is easily pulverized, does not decompose and gasify at the resin processing temperature (40 ° C. to 180 ° C.), and can be easily removed by water. Specifically, sodium chloride, sodium sulfate Metal salts such as sodium nitrate are preferably used. The diameter is usually 1 to 500 μm.
As the sugar, any of monosaccharides such as pentose and hexose, disaccharides such as saccharose and maltose, and polysaccharides such as starch and glycogen can be used, and these can be used in combination. The particle size is usually 1 to 500 μm. Among these, starch is excellent in water solubility, and a powder having a uniform required particle size can be easily obtained, and is preferably used because it is inexpensive.
The use ratio of the water-soluble foam-forming agent is about 50 to 1500 parts, preferably 100 to 800 parts, with respect to 100 parts of the thermoplastic resin. As the water-soluble foam-forming agent, salts and sugars may be used alone or in combination, and may be appropriately selected depending on the application.
Furthermore, an additive etc. can be used for a porous stamping material as needed. For example, polyethylene glycol, polypropylene glycol, polyethylene glycol, polypropylene glycol copolymer, polyethylene glycol alkyl ether, polypropylene glycol alkyl ether, polyvinyl alcohol, polyallylamine, paraffin, wax, higher fatty acid, fluorine surfactant, silicone surfactant Lubricants such as additives and nonionic surfactants, amine-based anti-aging agents, softeners such as petroleum jelly and plasticizers, additives such as reduced palatinose, and any pigments and dyes such as carbon black, nigrosine, petal, ultramarine An effective amount of such a coloring agent can be added.
Among the lubricants, polyethylene glycol having a melting point of 40 ° C. or higher, not decomposing at the melting point of the thermoplastic resin (40 ° C. to 180 ° C.), and having a molecular weight of about 700 to 30000 is most preferably used. Since the polyethylene glycol also has a melting point of 40 ° C. or higher and is solid at room temperature, it is possible to obtain a hardened solid body by forming a sheet body, and there is an advantage that handling is simple because it does not deform even when pressed with fingers. . Further, since the polyethylene glycol is water-soluble, it is removed when the sheet body is washed.
In addition, when using a method of forming a stamp surface of a porous stamping material by selectively irradiating infrared rays, an additive that efficiently absorbs infrared rays is required, and carbon black that is also used as a colorant is the most preferable addition Used as an agent.
The use ratio of the additive is about 0.1 to 1000 parts with respect to 100 parts of the thermoplastic resin. The additive is appropriately selected depending on the application, and several types can be used in combination.

Next, as a base fabric that can be used for the porous stamping material, cotton, silk, wool, acetate, vinylon, vinylidene, polyvinyl chloride, acrylic, polypropylene, polyethylene, polyurethane, fluorine-based filament, polyclar, rayon, nylon, Fabrics made of plain or twill fibers such as polyester, various knitted fabrics, and nonwoven fabrics can be used. In particular, woven and knitted fabrics using synthetic fibers with a fineness of 1d or less, called ultrafine fibers, are excellent in ink resistance, ink flowability, strength, fraying, heat resistance, adhesiveness, rotation, durability, etc. Most preferred. For example, Silflora X (trade name: manufactured by Toyobo Co., Ltd.), Xavina Minimax, Clausen MCF, and Versame Highte Cross (trade name: manufactured by Kanebo Co., Ltd.) are available.
The base fabric of the present invention is preferably a woven or knitted fabric having a thickness of 0.5 mm or less.

Next, a method for creating a porous stamp will be described.
First, a water-soluble foam-forming agent and, if necessary, additives such as polyethylene glycol and carbon black are added to a two-roll or kneader and stirred while heating. Next, the thermoplastic resin chipped is added and further mixed while maintaining a temperature equal to or higher than the melting point of the thermoplastic resin. Next, this mixture is formed into a flat plate shape with an extruder or the like, and then air-cooled to first form a plate-shaped original member.
The plate-like raw member is in a state in which water-soluble foaming agents and additives are uniformly and uniformly dispersed in the thermoplastic resin, and is a solidified hard flat body, Does not easily deform even when pressed with fingers.
A plate-like original member having a thickness of 20.0 mm or less can be extruded, and a plate-like original member having a thickness of less than 2.0 mm, for example, a thickness of 0.1 to 1.9 mm, can also be formed.
Next, the sheet-like original member and the base fabric are stacked and accommodated in a mold, and the sheet body is integrated by heating to a temperature of about 40 ° C. to 250 ° C. above the melting point of the thermoplastic resin while applying a little pressure. obtain. When the pressure is applied, the sheet body contracts and contracts to about 99% to 5% of the thickness of the plate-shaped original member. Alternatively, an integrated sheet body can be obtained even if a heat roll is installed at the extrusion port of the plate-like original member and continuously crimped to the base fabric.
Next, after removing water-soluble bubble forming agents, additives, and the like from the sheet body using warm water, running water, etc., this is dehydrated and dried to create a porous printing material.
The porous stamping material does not use an adhesive such as a hot melt sheet, but the thermoplastic resin and the base fabric are firmly bonded.
Next, a marking face is formed on the porous marking material. Normally, the porous printing material as in the present invention is used to protect the non-porous printing material in which the ink cannot ooze out by melting and solidifying a portion of the thermoplastic resin corresponding to the blank space in order to form a printing surface such as letters and figures on the surface of the printing material. A non-printing portion is formed with a coating, and a printing surface is formed by leaving the printing material unmelted so that ink can ooze out in a portion corresponding to a character graphic or the like.
As a method of forming the marking surface, a method of directly pressing a heated mold to melt the blank portion, a method of directly heating and melting the blank portion with a thermal head, and various laser beams such as a carbon dioxide laser and a YAG laser are used. For example, a method of heating and melting the blank portion, a method of heating and melting the blank portion with an infrared xenon flash lamp with an exothermic material interposed, and the like can be used.
Next, the porous stamp is cut to a required size with an ultrasonic cutter or the like.

Next, the rubber member 120 will be described.
The rubber member 120 can be obtained by kneading rubber, a vulcanizing agent, a filler, a softening agent, a colorant, an anti-aging agent, other additives, and the like, and then vulcanizing them. As the material, ordinary rubber can be used without any particular problem, and rubbers such as natural rubber, NBR, SBR, BR, IR, EPDM, ACM, and IIR can be used alone or in combination. The vulcanizing agent can be used without any problem as long as it is usually used for vulcanizing the rubber, and sulfur, sulfur compounds and the like can be used. Moreover, it is preferable to mix | blend additives, such as a filler, a softener, a coloring agent, and an anti-aging agent similarly to a general rubber molding. Examples of fillers include barium sulfate, calcium carbonate, silicic acid, magnesium silicate, and calcium silicate. Softeners include paraffinic process oil and naphthenic process oil. Colorants include Carbon black, titanium white, ultramarine blue, phthalocyanine, bengara, lead chromate and the like can be mentioned, and as the anti-aging agent, phenol, wax and the like can be mentioned. In addition, as other vulcanization aids, zinc stearate, stearic acid, zinc white, zinc oxide, magnesium oxide, etc., and as vulcanization accelerators, thiazoles, thyriums, sulfenamides, dithiocarbamates, etc. You may mix | blend an additive.

Next, a method for manufacturing a rubber member will be described.
Rubber, vulcanizing agent, filler, softening agent, coloring agent, anti-aging agent, vulcanization accelerator, vulcanization aid, etc. are kneaded well with a mixing roll, and then a sheet is taken out with a calender roll. Is placed in a mold engraved with characters and the like, a reinforcing cloth is stacked thereon, and vulcanized at a temperature of 100 to 200 ° C., a pressure of 100 to 200 Kg / cm 2, and a time of 10 to 20 minutes. Next, if this is cut into a required size, a rubber member can be obtained.

Next, a method for producing the endless print belt 100 for rotation stamp will be described.
As described above, there are prepared a porous stamp 110 on which a mirror image character composed of numbers, alphabets, and the like is formed, and a rubber member 120 on which a normal image character corresponding to the mirror image character is formed.
1 and 2, mirror image characters 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 are formed on the porous stamp 110, and 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 convex normal image characters are formed on the rubber member 120.
Next, both ends of the porous stamp 110 and both ends of the rubber member 120 are overlapped and heat-sealed by a heat sealing machine, thereby producing an endless print belt in which both are combined. Since the material is not a thermosetting resin but a thermoplastic resin, there is no particular need for an adhesive and it can be heat-sealed as it is, but it can also be bonded using an adhesive such as rubber glue. Usually, after this, the porous printing material 110 is impregnated with ink. However, since it is only necessary to finally obtain an endless printing belt containing the ink, it does not matter at which step the ink is impregnated.
When the porous printing material 110 and the rubber member 120 are combined in this way, the mirror image character of the porous printing material and the normal image character of the rubber member face each other. For example, when the mirror image character 5 of the porous printing material is located on the lower surface, The normal image character 5 of the rubber member is positioned on the upper surface. Thus, the endless printing belt of the present invention can be obtained.

When a plurality of endless printing belts of the present invention are used, a rotation mark as shown in FIG. 2 can be obtained. Reference numeral 130 denotes a support for supporting the endless print belt. However, the support 130 is usually not used as it is in FIG. It is also possible to arrange an ink storage for supplying ink at the lower end of the support.
Such a rotation mark can be directly rotated with a finger or the like, so that the endless print belt does not slip, and no rotator or knob is used. Can be slim.
In addition, when using a conventional rotation mark, it was difficult to confirm the position because the desired date and the like were selectively aligned while holding the handle of the rotation mark and looking into the marking surface. However, since the characters made up of numbers, alphabets, etc. formed on the endless printing belt are mirror images rather than normal images, they are difficult to see. Therefore, it is possible to easily place a desired character on the stamping surface simply by confirming the correct image character.
Further, since the porous stamping material can be impregnated with ink in advance, it becomes a penetrating stamp without using a stamp stand or the like, and continuous stamping is possible.

Endless printing belt of the present invention Rotation mark using a plurality of the present invention

Explanation of symbols

1, 2, 3, 4, 5, 6, 7, 8, 9, 0: mirror image characters 1 ′, 2 ′, 3 ′, 4 ′, 5 ′, 6 ′, 7 ′, 8 ′, 9 ′, 0 ',: Normal image character 100: Endless printing belt 110: Porous printing material 111: Ink oozing part 112: Non-ink oozing part 120: Rubber member 130: Support

Claims (1)

Reinforce the back of the porous thermoplastic resin with a lithographically printed surface using a mirror image character consisting of numbers, alphabets, etc. as the ink exudation part and a non-ink exudation part as the non-ink exudation part. A porous stamping material,
A rubber member formed by reinforcing the back surface of the rubber in which a normal image character corresponding to the mirror image character is formed in a convex shape with a base fabric made of a woven or knitted fabric or a nonwoven fabric,
An endless printing belt for rotating stamps, wherein the rubber member normal image characters corresponding to mirror image characters of the porous stamp material are coupled to face each other.