JP2018083062A - Silver particle supporting method and apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep a fixed temperature for support without depending on a surface area of a target objet when silver particles are discretely supported on the target object by IH, and perform uniform heating without depending on a volume of the target object within a range of arrival of IH electromagnetic waves.SOLUTION: A silver particle supporting method for induction-heating a target object in an immersed state and causing the target object to discretely support silver particles, includes: disposing the target object on an induction-heating diffusion metal; putting the induction-heating diffusion metal in a prescribed container; immersing the induction-heating diffusion metal in aqueous silver solution; and induction-heating the prescribed container.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a silver particle supporting method and apparatus for supporting silver particles on a target object by induction heating (hereinafter referred to as IH (induction heating)).

  Conventionally, the material of the resin for floors that becomes the part of denture base (gingiva) is acrylic resin, and it has the property of curing when heat is applied to a mixture of powder and liquid materials measured to a specified amount. Material.

  In recent years, a technique in which antibacterial properties, antifouling properties, and deodorizing properties have been sustained is known for flooring resins for creating dentures for dental technicians. That is, a technique for supporting nano silver particles on a target object by microwave irradiation for antibacterial coating is known.

  In other words, according to this technology, the nano-silver particles are carried discretely on the dentures by microwave irradiation, thereby providing an excellent antibacterial effect and maintaining the antibacterial effect even if chewing is continued. Is something that can be done. Therefore, as disclosed in Patent Document 1 already registered in the previous application, the present applicant employs a denture or a denture base resin (gingival) part resin, The denture is immersed in about 150 ml of an aqueous silver solution in a heat-resistant denture box having a relatively high magnetic permeability. And the nano silver particle carrying | support method which carries out the induction heating by irradiating IH with the power supply about 10V for a fixed time from the lower part of a denture box, and carrying | supporting a nano silver particle on a denture was proposed.

Japanese Patent No. 5887448

  However, in Patent Document 1 described above, when a denture including a metal bed is heated by IH and nano silver particles are discretely carried on the denture, the temperature rise by IH is not uniform depending on the size of the metal bed. No (see FIG. 7), there was a variation in each part of the metal floor, a constant temperature for supporting could not be maintained, and there was a possibility that uniform heating could not be performed, and it was necessary to improve it.

  Therefore, the present invention was created in view of the conventional circumstances as described above, and when the silver particles are discretely carried on the target object by heating with IH, the surface area of the metal bed of various dentures. A method for supporting nano silver particles that can maintain a constant temperature for supporting without depending on the volume and can perform uniform heating without depending on the volume of the metal bed of the denture within the electromagnetic wave reach of IH An object is to provide an apparatus.

In order to solve the above-described problems, the present invention provides a silver particle supporting method in which silver particles are discretely supported on the target object by performing induction heating (IH) while the target object is immersed. The target object is placed on the induction heating diffusion metal, the induction heating diffusion metal is placed in a predetermined container, the target object is immersed in an aqueous silver solution, and induction heating (IH) is performed on the predetermined container. It is characterized by performing.
Furthermore, in order to solve the above-described problems, the present invention is an apparatus for discretely supporting silver particles on the target object by performing induction heating (IH) while the target object is immersed. Then, the target object is disposed on the induction heating diffusion metal, the induction heating diffusion metal is placed in a predetermined container, the target object is immersed in a silver aqueous solution, and induction heating (IH) is performed on the predetermined container. It is characterized by that.

  According to the present invention, when silver particles are carried discretely on a target object by heating with IH, a constant temperature for carrying can be maintained without depending on the surface area of various target objects. Can be heated uniformly without depending on the volume of the target object within the electromagnetic wave reachable range.

It is the photograph of the metal floor size used for the comparison experiment in the case of a stainless mesh cage, a stainless steel plate cage, and a cage without an IH device. It is a photograph of a small metal floor used for a comparative experiment in the case of a stainless mesh cage, a stainless steel plate cage, and no cage by an IH device. It is a photograph of the metal container for induction heating diffusion by a stainless steel mesh basket. It is a photograph of the metal container for induction heating diffusion by a stainless steel plate cage. It is a line graph (when the vertical axis is ° C. and the horizontal axis is minutes) in Table 1 (when using a mesh cage). It is a line graph (when the vertical axis is ° C. and the horizontal axis is minutes) in Table 2 (when using a plate cage). It is a line graph (when the vertical axis is ° C. and the horizontal axis is minutes) in Table 3 (when there is no car). It is a line graph of Table 4 (without dentures) (the vertical axis is ° C. and the horizontal axis is minutes). It is a line graph (vertical axis is ° C. and horizontal axis is minutes) in Table 5 (large metal floor). It is a line graph (vertical axis is ° C., horizontal axis is minutes) of Table 6 (small metal floor).

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  In the present embodiment, as a test object (work) for collecting data carrying nano silver particles by an IH device, for example, a metal bed large (see FIG. 1) or a denture including a metal floor small (see FIG. 2). Is adopted.

  Then, the denture including the large metal floor or the small metal floor is accommodated in the induction heating diffusion metal container having corrosion resistance formed as the stainless steel mesh cage shown in FIG. 3 or the stainless steel plate cage shown in FIG. .

  Further, the induction heating diffusion metal container is placed in, for example, a heat-resistant denture box (not shown) having a relatively large magnetic permeability, and the metal floor or denture is immersed in about 150 ml of an aqueous silver solution described later.

  Then, for example, a method of irradiating IH with a power supply of about 10 V for a certain time from the lower part of the denture box is employed. That is, in the heating by IH irradiation, the denture box is placed on the magnetic force generating coil and a high frequency current (power supply of about 10 V) is supplied to the magnetic force generating coil, so that the entire denture box is irradiated with IH for a predetermined time.

  Then, an eddy current flows through the silver aqueous solution and the induction heating diffusion metal container in the denture box placed on the coil, and further to the work, and the electrical resistance of the silver aqueous solution and the induction heating diffusion metal container and the work itself. Joule heat is generated and self-heating occurs.

  After the IH irradiation, the work is taken out from the induction heating diffusion metal container in the denture box, the front and the back are reversed, immersed again in the silver aqueous solution, and again irradiated with IH under the same conditions. Thus, the nano silver particles in the silver aqueous solution can be discretely supported on the front and back of the workpiece by IH irradiation. Here, IH irradiation is performed after confirming that the aqueous silver solution is at room temperature (around 20 ° C.), and the rising temperature of the aqueous solution is kept at about 75 ° C. at the maximum. Can be prevented. As described above, since the irradiation with IH is performed at room temperature, silver does not form a thin film on the surface of the workpiece, but is nano-silver particles that are discretely carried on the surface of the workpiece.

  The aqueous silver solution is an aqueous solution of silver ions. For example, an alcohol preparation of 50 ml to 150 ml, preferably 500 ml of a highly safe silver aqueous solution containing phytic acid, sodium polyacrylate, sodium hydrogen carbonate, silver acetate and the like is desirable. May be a mixture of 100 ml. In addition, as a denture box, for example, a container made of a fluororesin (Teflon: registered trademark) having a permeability of minus 567 × 10 may be used to reduce the adhesion of nano silver particles.

<Comparison experiment with stainless steel mesh cage and stainless steel plate by IH device>
(1) Experimental instrument As an instrument used for the comparison experiment between the stainless steel mesh cage and the stainless steel plate cage by the IH device in this embodiment, the stainless steel mesh cage and the stainless steel plate cage which are the metal containers for induction heating diffusion. (T0.2), a denture including a metal floor large, a metal floor small, a denture box, an aqueous solution 150 ml × 9 containing silver ions, a non-contact infrared thermometer (for example, TASI-8608), and a stopwatch including.

(2) Experimental method (a) First, induction heating diffusion formed by forming a large metal floor (see FIG. 1) as an experimental work into a stainless mesh cage shown in FIG. 3 or a stainless steel plate cage shown in FIG. Store individually in metal containers.

  (B) Place the induction heating diffusion metal container containing the work in the denture box, and install the denture box in the bobbin.

  (C) Pour 150 ml of an aqueous solution of silver ions into the denture box.

  (D) Check that the power cord is connected to the IH device, and turn on the power switch.

  (E) Using a non-contact infrared thermometer, measure the temperature at 0 minutes of the central part of the work inside the induction heating diffusion metal container (the central part of the denture: the measurement location does not change with time).

  (F) At the same time when the start button of the IH device is pressed, recording of the temperature of the workpiece every minute is started by the non-contact infrared thermometer.

  (G) After 10 minutes, turn off the power switch of the IH device.

  (H) Replacing the denture box, the work, which is a denture including a small metal floor, is individually placed in a metal container for induction heating diffusion formed as a stainless steel mesh cage shown in FIG. 3 or a stainless steel plate cage shown in FIG. To house.

  (I) After that, the metal container for induction heating diffusion is put in the denture box, the denture box is installed in the bobbin, and thereafter the procedures from (C) to (G) are repeated.

(3) Experimental results Measurement data of the temperature (° C) of the work per minute is used. When the induction heating diffusion metal container is the stainless steel plate cage shown in FIG. 4, the induction heating diffusion metal container is the stainless steel mesh shown in FIG. In the case of a cage, the results shown in Tables 1 to 3 below were obtained by plotting the graphs for each case where there was no induction heating diffusion metal container (the graphs corresponding to the tables in FIGS. 5 to 10 were obtained). Show).

  In addition, when the measurement data of the workpiece temperature (° C) per minute is plotted on a graph for each of the case of no workpiece, the workpiece of a large metal floor, and the workpiece of a denture including a small metal floor, Table 4 The results shown in Table 6 were obtained.

  That is, as the induction heating diffusion metal container, the temperature of the stainless steel plate cage increased slightly faster than that of the stainless steel mesh cage.

  When both the stainless steel plate cage and the stainless steel mesh cage were used as the induction heating diffusion metal container, a stable temperature increase was observed regardless of the type of workpiece inside.

  In the case of no cage, the variation in the temperature rise for each type of workpiece was large. In the case of no workpiece and a denture workpiece including a small metal floor, the temperature hardly increased.

(4) Discussion From the above experimental results, it is possible to stabilize the output of IH by placing an induction heating diffusion metal container such as a stainless mesh cage or a stainless steel plate cage in the denture box. This is considered to be due to the fact that the stainless steel plate cage has a larger area to receive the magnetic flux than the stainless steel mesh cage, so the temperature rises slightly faster.

From the above, by passing the induction heating diffusion metal container containing the denture including the metal floor in the denture box, immersing the denture in the silver aqueous solution, and performing induction heating (IH) on the denture box It was confirmed that the nano silver particles dispersedly carried on the dentures suppressed the adhesion of Candida to the denture material. Thereby, it was shown that the application of the metal container for induction heating diffusion is effective in the method for supporting nano silver particles by IH irradiation on the denture including the metal bed.

Claims (2)

  A method of carrying silver particles by carrying out induction heating in a state in which a target object is immersed to disperse silver particles on the target object, wherein the target object is arranged on a metal for induction heating diffusion, and the induction heating is performed. A method for carrying silver particles, comprising placing a diffusion metal in a predetermined container, immersing a target object in a silver aqueous solution, and performing induction heating on the predetermined container. An apparatus for discretely supporting silver particles on the target object by performing induction heating in a state where the target object is immersed, the target object being disposed on the induction heating diffusion metal, and the induction heating diffusion metal Is placed in a predetermined container, the target object is immersed in a silver aqueous solution, and induction heating is performed on the predetermined container.