JP3577159B2 - Electrode material - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to an electrode material used by being attached to a human body as a conductor of a low-frequency treatment device or the like.
[0002]
[Prior art]
An electrode terminal such as a button fastener is attached to a support such as a synthetic resin film, and a conductive adhesive adhered to the support has already been used as an electrode material of a low-frequency treatment device, Various types of pressure-sensitive adhesives for electrode materials directly adhered to the human body have already been proposed, and many are commercially available. For example, a natural polymer polysaccharide such as karaya rubber, a conductive adhesive in which salt fine particles, metal fine particles, and the like are mixed as ionic species, and the above-described ionic species mixed in an acrylic hydrogel or a polyurethane gel. There is a conductive adhesive. A material using a support such as a polyethylene terephthalate film (hereinafter referred to as a PET film) or a special polyurethane film as the conductive adhesive is used as an electrode material.
[0003]
[Problems to be solved by the invention]
However, since the PET film has a high elastic modulus of 400 kg / mm ² and is poor in flexibility and flexibility, the electrode material using the PET film as a support has poor adhesion to a bent portion of a human body and is easily peeled off. was there.
[0004]
Further, the polyurethane film disclosed in Japanese Utility Model Laid-Open No. 5-76452 had a high elastic modulus of 30 to 350 kg / mm ² , had poor flexibility and flexibility, had poor adhesion to a human body, and was easily peeled off.
[0005]
For this reason, the conventional electrode material has a problem that in the early stage when the adhesive exhibits strong adhesiveness, even if it can adhere to the bent portion of the human body, it does not adhere when used a little and cannot be used.
[0006]
Furthermore, when a conductive paste is applied to a polyurethane film to form a conductive layer, the solvent of the conductive paste adversely affects the urethane film, causing a problem that the film shrinks, warps, and undulates. there were.
[0007]
The present invention has been made in view of the above problems, and an object of the present invention is to provide an electrode material which has excellent flexibility, can be sufficiently adhered to a bent portion of a human body, and can follow the bending.
[0008]
[Means for Solving the Problems]
The electrode material according to claim 1 of the present invention is a film formed by solidifying a polyurethane film support having a thickness of 50 to 300 μm and a 100% modulus of 30 to 150 kg / cm ² , and a conductive paint. a conductive layer made of, along with adhering the conductive adhesive, be those was allowed comprising an electrode terminal in contact with the conductive layer, in which the polyurethane film support and conductive layers are laminated.
[0009]
The electrode material according to claim 2 is a conductive material comprising a polyurethane film support having a thickness of 50 to 300 μm and a 100% modulus value of 30 to 150 kg / cm ² , and a film formed by solidifying a conductive paint. The layer and the conductive adhesive are brought into close contact with each other, and the conductive adhesive is partially removed to form a conductive layer exposed portion where the conductive layer is exposed, and the exposed portion can be electrically connected to the outside. Wherein a polyurethane film support and a conductive layer are laminated .
[0011]
The support used for the electrode material of the present invention is a polyurethane film having a thickness of 50 to 300 μm and a 100% modulus of 30 to 150 kg / cm ² , and has excellent flexibility and appropriate flexibility. When used on the skin, it can sufficiently follow the movement of the skin, does not easily turn over or peel off, has high tear strength, and does not tear during handling. When the thickness is less than 50 μm, it is too thin to cause difficulty in handling, and the tear strength is weak, so that it is difficult to use as a support material. On the other hand, when the thickness is 300 μm or more, the flexibility is inferior. If the 100% modulus is less than 30 kg / cm ^2, it is too soft to handle, and the strength is too weak. On the other hand, when the 100% modulus value is larger than 150 kg / cm ² , flexibility is insufficient, adhesion to a human body is poor, and peeling is easy.
[0012]
In addition, by laminating a conductive layer consisting of a film formed of a conductive material and a polyurethane film, it is no longer necessary to apply a conductive paste to the polyurethane film, so that adverse effects on the polyurethane film can be eliminated. This eliminates shrinkage, warpage, and waving of the polyurethane film, and can be preferably used as a support material.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
FIG. 1 is a cross-sectional perspective view of an electrode material showing one embodiment of the present invention, wherein 1 is an electrode material, 2 is a support, 3 is an adhesive, 4 is a conductive layer, and 10 is an electrode terminal. The electrode terminal 10 has a pin 11 and a flange 12, and the upper surface of the flange 12 is in close contact with the conductive layer 4 and is electrically connected.
[0015]
The support 2 is a polyurethane film having a thickness of 200 μm. The film is a non-yellowing type thermoplastic film and is milky white. Further, an antioxidant treatment is also performed. The film is a film obtained by casting a mixture of polyurethane polyol and polyurethane polyisocyanate on a PET film under a catalyst, heating the mixture to about 90 ° C., curing the reaction, and then peeling the mixture. The polyurethane film needs to have a thickness of about 50 to 300 μm and a 100% modulus value of about 30 to 150 kg / cm ² . If the thickness is reduced to less than 50 μm and the 100% modulus value is set to 30 kg / cm ² or less, the film becomes too soft and difficult to handle, and is insufficient in strength to easily tear. If the thickness is more than 300 μm and the 100% modulus value is more than 150 kg / cm ^2, it will be too hard, and will have insufficient adhesion to the human body. . When the thickness is 50 to 300 μm and the 100% modulus value is 30 to 150 kg / cm ² , it has appropriate flexibility, adheres well even to the bent part of the human body, and does not peel off the peripheral part. Satisfactory treatment can be performed over a long period. The 100% modulus value is a value measured based on JIS K-6301.
[0016]
The conductive layer 4 is provided on the lower surface of the support 2. A conductive paste made of a resin such as polyurethane or polyester, conductive carbon or silver and a solvent is applied to a PET film, and peeled off after solidification. The conductive film having a thickness of 20 μm obtained by laminating the above-mentioned conductive film was integrated with the above-mentioned polyurethane film, and its surface resistance was 1 to 50Ω / □. As described above, when the conductive layer 4 is formed by laminating, the solvent does not remain in the conductive film, the adverse effect of the solvent does not affect the polyurethane film, and the polyurethane film shrinks, warps, and undulates. A flat support can be obtained without generating. In addition, the conductive layer 4 can be formed of two layers, a silver paste layer and a carbon paste layer. In this case, the surface resistance of the conductive layer is reduced to 1 to 2 Ω / □, and the uniformity is obtained. An appropriate electric current flows to the human body through the adhesive, so that a preferable treatment can be performed. It is not excluded that the conductive paste is directly applied to form the conductive layer.
[0017]
As the conductive layer 4, in addition to a conductive paste, a metal fiber such as copper or iron may be contained, or the carbon fiber may be formed into a non-woven fabric or a woven fabric to have a surface resistance of 1 to 4. The conductive layer 4 may be formed by laminating a conductive film of 50Ω / □. Also in this case, no solvent is used, and no shrinkage, warping, or waving occurs in the polyurethane film or the like.
[0018]
As the adhesive 3, a natural polymer polysaccharide gum such as karaya gum, a hydrogel such as polyhydroxyethyl methacrylate, a polyurethane gel, or the like can be used. When the following polyurethane gel is stuck to the human body among the above-mentioned pressure-sensitive adhesives, it is excellent in adhesive strength without causing rash and the like, and is optimally colorless and transparent. That is, a product obtained by reacting a polyol having an alkylene oxide chain with a polyurethane polyisocyanate prepolymer having an alkylene oxide chain, or having a polyurethane polyol prepolymer having an alkylene oxide chain and an alkylene oxide chain. An adhesive obtained by reacting a polyurethane polyisocyanate prepolymer with an ionic compound such as sodium chloride, potassium chloride, lithium chloride, lithium perchlorate, lithium bromide, lithium borofluoride, etc. If at least one of these is contained, a preferred ion-conductive pressure-sensitive adhesive is obtained.
[0019]
The electrode terminal 10 is made of a metal such as brass or stainless steel or a conductive synthetic resin, and has a pin portion 11 protruding to the surface of the support 2 through a through hole formed in the conductive layer 4 and the support 2. It is composed of a large-diameter flange portion 12 that is in close contact. With this configuration, when an electric cord from a low-frequency treatment device main body (not shown) is connected to the pin portion 11 of the electrode terminal 10, a current flows uniformly from the electrode terminal 10 to the entire surface of the conductive layer 4, and the adhesive 3 , A low-frequency treatment can be performed by applying an electric current to the human body. When the terminal 10 is rusted by water in the adhesive or the like, the rust is prevented by covering the flange 12 of the terminal 10 with a synthetic resin film 13 such as a PET film.
[0020]
FIG. 2 shows an electrode material 1 according to another embodiment of the present invention, in which a support 2 is made of a polyurethane film having a thickness of 100 μm, and on one surface thereof, the same conductive layer 4 as in the above embodiment is further provided. 3 are stacked. On one side of the electrode material 1, a cutout portion 31 without the adhesive 3 is partially formed to expose the conductive layer 4, and the conductive layer exposed portion 41 is provided with a hole 42. When the electrode material 1 is used, the exposed portion 41 of the conductive layer 4 is used by electrically connecting an electric code from the main body of the low frequency treatment device. In FIG. 2, power is supplied using a separate socket 5. The socket 5 has a projection 51 and a recess 52 fitted with the projection 51 connected via a flexible portion 53, and a connection terminal 54 is provided inside the recess 52. The connection terminal 54 of the socket 5 and the conductive layer 4 of the electrode material 1 are brought into contact with each other by making it penetrate through the hole 42 of the electrode material 1 and fit into the recess 52, thereby making an electrical connection. In addition, the non-woven fabric 5 of polyester is buried in the adhesive 3 in a layer shape, and at the same time, the shape retention of the adhesive 3 is improved, and at the same time, the workability and the handleability due to the thin adhesive 3 are compensated for. I have.
[0021]
【The invention's effect】
As is clear from the above description, the electrode material of the present invention uses a polyurethane film having a thickness of 50 to 300 μm and a 100% modulus of 30 to 150 kg / cm ² as a support, and a conductive layer and an adhesive on the lower surface of the film. When the electrode material is adhered to a human body, it is excellent in flexibility and is not easily peeled off, and is particularly suitable for a place where the joints such as knees and elbows are severely bent. In addition, since the conductive layer is formed by laminating a film formed of a conductive material on a polyurethane film, the conductive paste is not directly applied to the urethane film, and the polyurethane film as a support material shrinks. An electrode material that does not warp, warp, or undulate can be obtained.
[Brief description of the drawings]
FIG. 1 is a sectional view of an electrode material according to an embodiment of the present invention.
FIG. 2 is a sectional view showing an electrode material and a socket according to another embodiment of the present invention.
[Explanation of symbols]
Reference Signs List 1 electrode material 2 support 3 adhesive 4 conductive layer 5 socket 10 electrode terminal 41 conductive layer exposed portion

Claims (2)

A support of a polyurethane film having a thickness of 50 to 300 μm and a 100% modulus of 30 to 150 kg / cm ² , a conductive layer made of a film formed by solidifying a conductive paint, and a conductive adhesive An electrode material which is provided with an electrode terminal which is brought into close contact with the conductive layer and which is laminated with a polyurethane film support and a conductive layer . A support of a polyurethane film having a thickness of 50 to 300 μm and a 100% modulus of 30 to 150 kg / cm ² , a conductive layer made of a film formed by solidifying a conductive paint, and a conductive adhesive The polyurethane film is formed by forming a conductive layer exposed portion where the conductive layer is exposed by removing the conductive pressure-sensitive adhesive partly while making close contact with the conductive layer. An electrode material, wherein a support and a conductive layer are laminated .

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