JP3521990B2 - Heated print - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-generating printed body used for foil stamping and thermal transfer. 2. Description of the Related Art Conventionally, a heat-generating printed body has been used for foil-pressing a machine or a product.
7, JP-A-56-27368, JP-A-56-2736
9, JP-A-62-242550 and the like are known. However, since the material of the printing portion is a hard material such as metal, glass, ceramics, etc., these are difficult to use when the object to be stamped is a soft material such as resin or plastics. Although a clear imprint could be obtained, a clear imprint could not be obtained with a hard material such as metal or glass. Therefore, the present invention provides a heat-generating printed body capable of obtaining a clear imprint regardless of a soft material or a hard material. [0004] In a heat-generating printed body comprising a printing portion, a base portion, and an electrode, a heating portion having a printing portion integrated with a base portion and an integrated printing portion and an electrode are provided. A heat-generating printed body, wherein the printed portion is made of carbon-containing silicon rubber. [0005] The heat-generating printed body of the present invention is set on a hand-held stamp, and the heat-generating printed body is mounted on a stamp using two 006P-9V dry batteries.
When a voltage of 8 V was applied and the sheet glass was stamped with a thermal transfer foil interposed, a clear imprint could be obtained.
In the present invention, since the printed body itself becomes the heating element, the required amount of heat can be obtained efficiently with small electric power. Hereinafter, the present invention will be described in detail. The printing portion used in the present invention is formed by forming characters and the like on carbon-containing silicon rubber. The carbon-containing silicon rubber is a mixture obtained by mixing raw silicon rubber, carbon, and a cross-linking agent and uniformly dispersing the mixture under heating under a certain pressure to cross-link the mixture. Raw silicon that can be used here is not particularly limited, but TSE221-5 manufactured by Toshiba Silicone Co., Ltd.
U ・ TSE221-6U ・ TSE2122-6U ・ TS
E270-6U ・ TSE260-5U ・ TSE261-
5U · TSE2323-5U and the like, and KE941-U · KE951-U · KE9611-U manufactured by Shin-Etsu Chemical Co., Ltd.
-KE765-U, KE540-U, KE552-U, etc., and SH745 manufactured by Toray Dow Corning Silicone Co., Ltd.
U ・ SH35U ・ SH52U ・ SH841U ・ SE11
20U / SE1602U / SE4706U. Carbon having a particle size of 0.01 to 0.3 μm is preferably used, and is blended in the mixture at a ratio of 20 to 60% by weight. Note that YE3452UB TCM540 manufactured by Toshiba Silicone Co., Ltd., which is commercially available as silicon rubber in which carbon is dispersed in raw silicon rubber.
6U ・ TCM5407U ・ TCM5417U etc., KE3603-U ・ KE3601SB manufactured by Shin-Etsu Chemical Co., Ltd.
-U-KE3611-U-KE3711-U-KE38
01M-U, etc. and SE6758U, SE6765U, SE6770U, manufactured by Toray Dow Corning Silicone Co., Ltd.
SRX539UT / DY38-008 or the like may be used. As the crosslinking agent, known peroxides can be used, for example, benzoyl peroxide, 2,4 dichlorobenzoyl peroxide, dicumyl peroxide, ditertiary butyl peroxide, 2,5 dimethyl 2,5 ditertiary butylperoxyhexane, Parachlorobenzoyl peroxide, tertiary butyl cumyl peroxide, tertiary butyl perbenzoate, and the like can be used, and can be blended at a ratio of 1 to 5% by weight in the mixture. The printing portion is generally obtained by forming the mixture into a sheet, placing the mixture in a mold in which concave characters or the like are carved, and applying pressure and heating. Pressure is 100-200kg / c
m ² , a temperature of 150 to 200 ° C., and a heating time of 5 to 20 minutes are appropriate. In the present invention, the thickness of the printed portion is 0.1 to
It can be 5 mm, but 0.3-3 mm is most preferred. If the thickness is 0.3 mm or less, it is difficult to form a character portion, and if it is 3 mm or more, the heat generation efficiency decreases. The base portion may be made of a material having insulation, heat insulation, and heat resistance. In particular, glass, ceramics, fluorine rubber, silicon rubber and the like are preferably used, and various commercially available products such as the above-mentioned commercially available silicon rubber can be used. In addition, a heat-resistant cloth made of glass fiber, aramid fiber, or the like can be used.
If it is about 0 to 60 seconds / time, a cotton cloth can be used without any practical problem. The electrode may be anything as long as it is conductive,
Particularly, copper having high conductivity is preferably used. However, since copper has good thermal conductivity, it is preferable to make the electrode extremely thin, or to form a film obtained by depositing copper on a plastics film and wind it around a heat insulating material, or to directly vapor-deposit the heat insulating material to form an electrode.
Further, it is preferable to increase the contact area with the printing unit in order to reduce the contact resistance. The heat-generating printed body of the present invention integrates the printed portion and the base portion by a method such as bonding with an adhesive or the like, a method of clamping with a clip or the like, a method of holding with a support or the like, and bonding the printed portion and the electrode. It can be obtained by integrating by a method such as bonding with an agent or the like, a method of clamping with a clip or the like, or a method of holding with a support or the like. Further, if the printing portion and the base portion are formed by heating at the same time, an integrated product of the printing portion and the base portion can be obtained.
For example, when silicon rubber is used for the base portion, the carbon-containing silicon rubber mixture and the raw silicon rubber are each formed into a sheet shape and superposed, and then placed in a mold in which a concave character is carved, and heated under pressure. At this time, it is preferable to use a raw silicon rubber having a hardness of 40 to 60 which is softer than the printed portion at the base, since a printed portion having a uniform thickness can be obtained. As another method, a solution obtained by dissolving the mixture in an organic solvent such as ketone is applied or atomized and dried on the base in which a convex character is created in advance, and then the melting point temperature of the base in an electric furnace or the like. An integrated heat-generating printed body can be obtained even by heating below. This method is suitable for producing a heat-generating printed body of large characters. Also, if the electrodes are sandwiched between the printing portion and the base portion and simultaneously heated under pressure, the three members can be integrated at one time. Hereinafter, embodiments will be described, but the present invention is not limited to the embodiments. Embodiment 1 FIGS. 1 and 2 show Embodiment 1 of the present invention. Reference numeral 2 denotes a printing portion, 3 denotes a base portion, and 4 denotes an electrode. In the printing portion of this example, carbon having a particle size of 0.04 μm and 50 g were dispersed and kneaded in 100 g of raw silicone rubber, and then 1 g of 2,5 dimethyl 2,5 di-tert-butylperoxyhexane was added as a crosslinking agent. , The mixture that was kneaded again was 1 m thick
m (the hardness was 80).
150kg into a mold with engraved concave letters corresponding to
/ cm ² and heated at 170 ° C. for 10 minutes. After releasing the mold, after-curing was further performed in an oven at 200 ° C. for 4 hours. This was cut into a square shape having a side of 10 mm to obtain a printed portion having a thickness of 2 mm (the thickness of the printed portion surface layer was 1 mm). For the base, commercially available silicone rubber was cut into an appropriate size and used. In this embodiment, a copper foil as an electrode was adhered on the base portion, and the printed portion was further adhered thereon. Second Embodiment FIGS. 3 and 4 show a second embodiment, which was produced as follows. After dispersing and kneading 50 g of carbon having a particle size of 0.04 μm in 100 g of raw silicone rubber, 1 g of 2,5 dimethyl 2,5 ditert-butylperoxyhexane is added as a cross-linking agent, and the kneaded mixture is thickened again. The sheet was 0.5 mm in length. (The hardness was 80.) Next, 2,5 dimethyl 2,5 was added to 100 g of raw silicone rubber.
After 1 g of ditertiary butyl peroxyhexane was added and kneaded, a sheet having a thickness of 5 mm was formed. (The hardness is 5
0 was set. Next, the two were superimposed, set in a mold having engraved concave letters corresponding to FIG. 3, and heated under pressure at 150 kg / cm ² and 170 ° C. for 10 minutes. After releasing the mold, after-curing was further performed in an oven at 200 ° C. for 4 hours. Then, it was cut into a rectangular shape with a side of 15 mm to obtain an integrated print portion and base portion. The printed portion had a uniform thickness (0.5 mm). Next, a film obtained by evaporating copper on a polyimide plastic film was 1.0 mm thick.
The electrode was wound around the heat insulating material, and was brought into contact with a portion other than the character portion of the printed portion, and this was integrated with the support 5 to produce a heat-generating printed body. [0008] Table 1 shows the performance of the embodiment. [Table 1] With the above-described configuration, the present invention has the following effects. Since the printed portion is made of soft silicone rubber, it can be pressed clearly not only on soft materials such as plastics and resin but also on hard materials such as glass and metal. Since the printing section is a heating element, the heat efficiency is very good and power saving is possible. In addition, since the thickness of the printing section can be extremely thin, the heat generation efficiency can be increased. Since the resistance of the carbon-containing silicon rubber increases as the temperature increases, the resistance decreases as the temperature decreases, so that the printed body itself can have a thermostat function. Extremely low power consumption enables miniaturization,
For example, if a thermal transfer ribbon is used instead of the thermal transfer foil, a handy type stamp can be produced. In addition, since the carbon-containing silicon rubber tends to decrease in strength as the conductivity increases, in particular, the heating print body obtained by simultaneously forming the printing portion and the base portion, the base portion supplements the strength of the printing portion, Bending resistance and durability can be improved. Further, when a soft material such as fluorine rubber or silicon rubber is used for the base portion, a back cushion effect is generated, which further contributes to clear printing. [0010]

[Brief description of the drawings] FIG. 1 is a perspective view of a first embodiment. FIG. 2 is a cross-sectional view of the first embodiment. FIG. 3 is a perspective view of a second embodiment. FIG. 4 is a cross-sectional view of the second embodiment. [Explanation of symbols] 1 Heating printed body 2 Printing section 3 Base 4 electrodes 5 Support

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B41F 16/00 B41K 1/00-1/58 B41M 1/00-3/18 B41M 5/035 B41M 5 / 26-5/26 102

Claims (1)

(57) [Claim 1] In a heat-generating printed body including a printing portion, a base portion, and an electrode, heat generation is performed by integrating the printing portion and the base portion, and by integrating the printing portion and the electrode. A heating body, wherein the printing body is a carbon-containing silicone rubber.