JPH04367667A - Magnetic effect element and production thereof, magnetic treating device formed by using magnetic effect element - Google Patents

Abstract

PURPOSE:To form a thick-film magnet having extremely high adhesion on a silicone rubber base plate harmless to human bodies and to produce a thick- film magnet which is stably usable without generating the eruption and allergy of the skin in spite of the long-term contact with the skin as well as to provide the magnetic treating device formed by using this magnet. CONSTITUTION:A thick-film magnetic compsn. 1 prepd. by mixing ferromagnetic material powder and a thermosetting silicone resin and curing the mixture by heating is formed on the silicone rubber base-plate 2 and is magnetized in a thickness direction after the curing by heating, by which the thick-film magnet is formed. This magnet is applied to the magnetic treating device.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic effect element in which a thick film magnetic composition is formed on a silicone rubber substrate, a method for manufacturing the same, and a magnetic therapy device using the magnetic effect element.

0002

2. Description of the Related Art Conventionally, there has been a magnetic therapy device that uses a small magnet in close contact with the skin of a human body and utilizes the magnetic effect of the magnet to treat stiff shoulders and the like. The magnets used in these magnetic therapy devices are, for example, made of ferromagnetic powder with epoxy or PVB.
(polyvinyl butyral) as a vehicle,
For example, it has been adhered to a substrate made of polystyrene, polyethylene, or polyimide resin in the form of a thick film.

However, these substrates are not completely harmless to the human body, and may cause allergies in some people, so improvements have been desired. For example, silicon is harmless to the human body and is preferable as a substrate for a magnetic therapy device that is brought into close contact with the skin.

0004

[Problems to be Solved by the Invention] However, silicon, which is generally used as a release material, does not have good adhesion to other substances. For this reason, conventional magnets formed by mixing ferromagnetic powder with epoxy or PVB (polyvinyl butyral) as a vehicle cannot be brought into close contact with silicone rubber substrates, for example, by about 90 degrees as shown in Figure 6. Even when bent, it peeled off easily. In FIG. 6, 11 is a thick film magnet with a conventional composition, and 12 is a thick film magnet with a conventional composition.
is a silicon rubber substrate. As shown in FIG. 6, complete peeling occurred almost at the bent portion.

[0005] For this reason, conventionally it has been impossible to form magnets on silicone rubber substrates.

[0006]

[Means for Solving the Problems] The present invention has been made for the purpose of solving the above-mentioned problems, and has the following configuration as a means for solving the above-mentioned problems. That is, there is a mixing process in which a ferromagnetic material powder and a thermosetting silicone resin are mixed to produce a ferromagnetic material paste, and a desired shape is formed on a silicone rubber substrate using the ferromagnetic material paste produced in the mixing process. A printing process of printing a thick film pattern of ferromagnetic material with a predetermined thickness, a heating process of heating and hardening the thick film pattern of ferromagnetic material printed in the printing process, and a heating process of heating and hardening the thick film pattern of ferromagnetic material printed in the printing process; A thick film magnet is formed on the silicon rubber substrate through a magnetization process.

[0007] Then, this is applied to a magnetic therapy device.

[0008]

[Operation] With the above structure, a thick film magnet with extremely high adhesion can be formed on a silicone rubber substrate which is harmless to the human body. Furthermore, since the vehicle of this thick-film magnet is also silicone, it will not cause skin irritation or allergies even if it is in contact with the skin for a long period of time, and it can be used with confidence even when applied to magnetic therapy devices. .

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

0010

FIRST EXAMPLE FIG. 1 is a process diagram showing the manufacturing process of a thick film magnetic composition according to an example of the present invention. Hereinafter, an outline of the manufacturing process of an embodiment of the present invention will be explained with reference to FIG. First, in step 1, the basic configuration is (Nd2Fe
14B) neodymium/iron/boron alloy powder with an average particle size of 15 μm to 30 μm and a thermosetting silicone paint are weighed so that the amounts are 85 wt% and 15 wt%, and an appropriate amount of carbitol is added as a solvent. . Then, mix this thoroughly using, for example, a three-roll roll to make a magnetic paste.

In step 2, the magnetic paste produced in step 1 is used to print a thick film magnetic paste pattern with a desired shape and thickness. This printing process can use the same printing equipment as used for printing conductor patterns of electric circuits, etc., and can be performed using the same method. for example,
Printing can be performed using various printing methods such as silk screen printing, flexographic printing, letterpress printing, and gravure printing. This printed shape can also be any shape, and one
Even if you print only one pattern, multiple patterns of the same shape, or multiple patterns of different shapes, all can be done in one process.

Next, in step 3, the silicone rubber substrate printed with the thick film magnetic paste is heated in an atmosphere of 180°C for about 30 minutes.
Heat for a minute to cure. Examples of thick film magnetic compositions heat-cured in this manner are shown in FIGS. 2 and 3. FIG. 2 is a perspective view, and FIG. 3 is a sectional view. 2 and 3, a substantially circular diameter 5 mm is placed on a silicone rubber substrate with a thickness of approximately 2 mm.
An example is shown in which a thick film magnetic composition with a thickness of 0.67 mm and a film thickness of 0.67 mm was formed.

Next, in step 4, the thick film magnetic composition is magnetized using a magnetizer to form a magnet. For example, as shown in Figure 4, N
The silicone rubber substrate on which the thick film magnetic composition was formed was placed in a magnetizer in which an S pole was formed on the top surface and magnetic lines of force passed through in the thickness direction, and the substrate was magnetized at 15,000 oersteds to form a magnet. Note that the magnetization of this thick film magnetic composition is not limited to the example in which it is carried out in the thickness direction, but may also be carried out in the planar direction. Furthermore, it goes without saying that other directions may also be used.

The thick film magnet of this example manufactured as described above had a surface magnetic flux of approximately 400 Gauss as measured with a Gauss meter. In addition, when the thick film magnet manufactured in this way was separately measured at room temperature using a vibrating sample magnetometer (VSM), the saturation magnetic flux density was 7200 Gauss,
The characteristics were a residual magnetic flux density of 5200 Gauss and a coercive force of 7600 Oersted.

As explained above, according to this embodiment, when printing a ferromagnetic material on a silicone rubber substrate that is harmless to the human body, very good adhesion can be achieved because the silicone thermosetting resin is used as a paste and is used as a vehicle. You can maintain your sexuality. For this reason, conventionally, the silicon rubber substrate peeled off when bent by 90 degrees as shown in FIG. 6, but it does not peel off at all even when bent to about 180 degrees as shown in FIG.

[0016] In addition to using a silicone rubber substrate as the substrate, by using a silicone resin that is harmless to the human body as a vehicle, the adhesion to the silicone rubber substrate is increased, and
Safety and comfort as a magnetic effect element are also improved. Therefore, even if it is in contact with the skin for a long period of time, it can be used without causing any allergic reaction. For this reason,
By incorporating the above-mentioned thick film magnet as a magnetic therapy device that utilizes magnetic effects and bringing it into close contact with the affected area, it is possible to provide a magnetic therapy device that is extremely safe and can be used with peace of mind.

[0017] The surface magnetic flux of the magnet can be adjusted by the amount of thermosetting resin mixed and the strength of the magnetic field during magnetization, making it possible to provide thick-film magnets of all specifications. Furthermore, the structure of the ferromagnetic material forming the thick film is not limited to the above example; for example, N
Similar effects can be achieved by using a ferromagnetic material powder whose basic composition is Sm-Co instead of d-Fe-B.

The shape of the printed pattern of the magnetic paste can be any shape, for example, square, rectangle, circle, ellipse, diamond, trapezoid, triangle, etc. It is also extremely easy to form a polygonal shape that includes the following. In addition, the shape of the thick film is not limited to the case where it is approximately uniform and has approximately the same thickness;
Of course, the peripheral portion may have a thick shape.

[0019]

As explained above, according to the present invention, it is possible to form a thick film magnet with very high adhesion on a silicone rubber substrate which is harmless to the human body. Moreover, since the vehicle of this thick-film magnet is also silicone, it increases its adhesion to the silicone rubber substrate, and also improves the safety and comfort of the magnetic effect element, even when it is in contact with the skin for a long period of time. It does not cause skin irritation or allergies, and can be safely used in magnetic therapy devices.

Furthermore, the surface magnetic flux can be adjusted by adjusting the amount of thermosetting resin to be mixed and the strength of the magnetic field during magnetization, making it possible to provide thick-film magnets with various specifications.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing the manufacturing process of a thick film magnet according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the state of formation of a thick film magnetic composition in this example.

FIG. 3 is a cross-sectional view showing the state of formation of a thick film magnetic composition in this example.

FIG. 4 is a diagram for explaining the magnetization process in this example.

FIG. 5 is a diagram illustrating the adhesion of a thick film magnet formed on a silicon rubber substrate in this example.

FIG. 6 is a diagram illustrating the adhesion of a thick film magnet formed on a conventional silicon rubber substrate.

[Explanation of symbols]

1 Thick film magnetic composition 2 Silicon rubber substrate 11. Conventional thick film magnet.

Claims (3)

[Claims] 1. A magnetic effect element comprising a thick film magnetic composition formed by mixing a ferromagnetic material powder and a thermosetting silicone resin and curing the mixture by heating on a silicone rubber substrate. 2. A mixing step of mixing a ferromagnetic material powder and a thermosetting silicone resin to produce a ferromagnetic material paste; A printing process of printing a ferromagnetic material thick film pattern of a desired shape and a predetermined thickness, a heating process of heating and curing the ferromagnetic material thick film pattern printed in the printing process, and a thickness after heating and curing in the heating process. A method for manufacturing a magnetic effect element, comprising a magnetization step of magnetizing in the horizontal direction. 3. A magnetic effect element characterized in that a thick film magnet is formed by mixing ferromagnetic material powder and thermosetting silicone resin on a silicone rubber substrate and magnetizing the mixture after heating and curing. A magnetic therapy device.