JP2007098060A - Face/head pad for ion introduction tool, and ion introduction tool provided with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a face/head pad for an ion introduction tool which is durable and flexible and which simply and equally introduces ion to a comparatively wide area of the face, the head skin, etc. by once introduction, and to provide the ion introduction tool provided with the face/head pad. <P>SOLUTION: The face/head pad used for the ion introduction tool comprises an insulation supporter layer and a conductive silicone rubber layer. The volume resistivity of the conductive silicone rubber in the conductive silicone rubber layer is ≤15 Ωcm, hardness is 50 to 80 and an elongation is ≥180%. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a face head pad for an iontophoresis device and an iontophoresis device including the same.

  An iontophoresis method (iontophoresis) that enhances the cosmetic effect on the skin has attracted attention. This is a method in which a weak electric current is applied to the skin and an ionized aqueous solution of vitamin C derivative such as magnesium ascorbate phosphate (hereinafter referred to as “introducing agent”) penetrates deep into the skin. Usually, an iontophoresis device is used to allow the introduction agent to penetrate into the deep part of the skin stably and continuously. In the operation of this apparatus, the electrode portion of the iontophoresis device is applied to the skin, and a weak current of 1 mA, for example, is introduced into the human body.

  At this time, for example, the introduction agent contained in cosmetic cotton wound around the electrode reaches the dermis from the epidermis and effectively acts to maintain skin beauty. That is, it suppresses abnormal increase in melanin that causes pigmentation such as spots (liver spots), buckwheat (sparrow egg) or transient pigmentation (after laser irradiation) on the skin, or decolorizes melanin once formed Is possible. The advantage of using an ion introducer is not limited to this, and it is also possible to obtain a cleansing effect by removing dirt clogged in pores using a skin toner after washing the face before ion introduction. Such an ion introducer is disclosed in, for example, Patent Document 1 and Patent Document 2. Further, in Patent Document 3, the hair part of the brush that combs the hair is composed of a metal eyelash pin, and an electrode is provided on the part that can be touched by the handle of the handle, and a high frequency pulse is applied between the eyelash pin and the electrode. A hair brush that is connected to a power supply that can be supplied is disclosed.

  However, these conventional iontophoresis devices have a narrow adhesion surface with the skin, and when introducing ions into a relatively wide area such as the face and scalp, the skin to which the iontophoresis device is adhered is gradually shifted and moved several times. However, it was necessary to introduce ions, which required much time.

  In order to compensate for such drawbacks, attempts have been made to develop an ion introducer that can introduce ions into a relatively wide portion at once and a tool used therefor. For example, in Patent Document 4, a mask main body (1) is formed with a web of water-retaining material, and a skin beautifying liquid is impregnated in the mask main body (1). There is described a cosmetic mask characterized in that a substance capable of being energized is applied and the electrode conductor of the iontophoresis device (3) can be connected to the energizing substance application part (2). However, in the case of ion-introducing a plurality of cosmetic liquids or the like, it is necessary to impregnate a plurality of masks with the chemical liquid and then apply a conductive material to each of them. That wasn't true.

  Further, Patent Document 5 discloses that a conductor (2) is impregnated with a conductor for use in medical and cosmetic purposes, in which the conductor (2) is adhered to the whole or a part of one side of the drug-impregnated sheet (1) by a method such as adhesion, welding or pressure bonding. A sheet is described. However, depending on the material of the conductor, the current flowing through the drug-impregnated sheet may be uneven, or the current may flow relatively uniformly, but the conductor is not flexible enough to introduce ions into the face. When it is necessary to hold the attached chemical-impregnated sheet with a hand, or when the strength of the conductor portion is insufficient and insufficient in terms of durability, it is not sufficient in terms of practicality.

  In addition, the conductive silicone rubber itself is a known substance, and has been used for electrical contacts such as remote control switches and conductive parts. However, it has not been known to use conductive silicon rubber as a face head pad for ion introduction.

Japanese Patent Laid-Open No. 2004-237043 JP 2005-237545 A Japanese Patent Laid-Open No. 7-241345 Japanese Patent No. 2768456 JP 2003-38660 A

  The present invention is a face / head pad for an iontophoresis device that is excellent in durability and flexibility in view of the problems and insufficiencies of the conventional iontophoresis device and the tools used therefor, such as a face. Provided is a face / head pad for an ion introducer that enables simple and more uniform ion introduction into a relatively large area such as a scalp or the like once, and an iontophoresis device including the face / head pad. Is an issue.

  The present inventors have found that the above problems can be solved by using a face head pad having an insulating support layer and a specific conductive silicon rubber layer, and have completed the present invention.

  That is, the present invention is (1) a face head pad used in an iontophoresis device, which has an insulating support layer and a conductive silicon rubber layer, and the volume resistance of the conductive silicon rubber in the conductive silicon rubber layer. A face head pad characterized by a rate of 15 Ω · cm or less, a hardness of 50 to 80, and an elongation of 180% or more; and (2) the tensile strength of conductive silicone rubber is 5.0 MPa. The face / head pad as described in (1) above, or (3) the conductive silicon rubber of the conductive silicon rubber layer is a conductive silicon rubber containing carbon. (1) to (1) above, wherein the thickness of the face / head pad according to (1) or (2) above or (4) the conductive silicon rubber layer is 0.2 to 1.0 mm. 3) No The face head pad according to any one of the above (1) to (4), wherein the face head pad according to any one of the above, (5) the insulating support layer is an insulating resin layer, (6) The face head pad according to (5) above, wherein the insulating resin layer is an insulating silicon rubber layer, and (7) the thickness of the insulating silicon rubber layer is 0.3 to 1. The face or head pad as described in (6) above, which is 8 mm, or (8) the surface of the conductive silicone rubber layer opposite to the surface in contact with the insulating support, the drug or cosmetic is attached. The face / head pad according to any one of (1) to (7) above, or (9) the drug or cosmetic is in a gel form, It is related with the face head pad.

  The present invention is also (10) a face / head pad set for use in an iontophoresis device, comprising a face / head pad according to any one of (1) to (9) above and a sheet having water retention. The head pad set or (11) the water-retaining sheet is made of cotton, and the face-head pad set according to (10) or (12) the water-retaining sheet is a drug or The face-head pad set according to (10) or (11) above, which contains a cosmetic.

  Furthermore, the present invention provides (13) the face / head pad according to any one of (1) to (9) or the face / head pad set according to any one of (10) to (12), and iontophoresis. And (14) the iontophoresis device described in (13) above, further comprising a waterproof container that can accommodate the iontophoresis device.

  The present invention also relates to (15) a method for ion-introducing a drug or cosmetic, characterized by using the iontophoresis device described in (13) or (14) above, or (16) described in (14) above. The present invention relates to a method for ion-introducing a drug or cosmetic, characterized by using the iontophoresis device in a bathroom.

  The face head pad having the insulating support layer and the conductive silicone rubber layer of the present invention is excellent in durability and flexibility. Further, when the face / head pad is used, ions can be more easily and uniformly introduced into a relatively large area such as the face and scalp at a time.

  The face head pad of the present invention is a face head pad used for an iontophoresis device, and has an insulating support layer and a conductive silicon rubber layer, and the volume of the conductive silicon rubber in the conductive silicon rubber layer. A face head pad having a resistivity of 15 Ω · cm or less, a hardness of 50 to 80, and an elongation of 180% or more. The face head pad in this specification represents a face pad or a head pad. The face pad in the present invention means a pad that can be worn on the face, and the head pad in the present invention means a pad that can be worn on the scalp. The face / head pad in the present invention is a pad of any shape that can be attached to any part of the human body other than the face and scalp, for example, the neck, arms, back, chest, legs, abdomen, back of the hand, etc. for convenience. And pads of any shape suitable for being worn on any part of the human body other than the face and scalp, but not shaped to be worn on the face or scalp.

  The conductive silicone rubber used for the conductive silicone rubber layer of the present invention is not particularly limited as long as the volume resistivity is 15 Ω · cm or less, the hardness is 50 to 80, and the elongation is 180% or more. The volume resistivity may be 15 Ω · cm or less, preferably 10 Ω · cm or less, more preferably 6 Ω · cm or less, and further preferably 4 Ω · cm or less. Moreover, although hardness should just be in the range of 50-80, Preferably it is 50-77, More preferably, it is 55-69, More preferably, it is 62-66. The elongation may be 180% or more, preferably 200% or more, more preferably 220% or more, and further preferably 250% or more. By using such conductive silicone rubber, the durability and flexibility of the face / head pad are excellent, and ions can be more easily and more uniformly introduced into a relatively large area such as the face and scalp at once. It becomes possible. In particular, when conductive silicon rubber having a high volume resistivity is used, the amount of current flowing through the face / head pad region may be uneven. In addition, the volume resistivity, hardness, and elongation in the present invention are values measured by a test method of JIS K 6249, respectively.

  The tensile strength of the conductive silicone rubber used in the present invention is not particularly limited, but is preferably 5.0 MPa or more, more preferably 5.5 MPa or more, still more preferably 6.0 MPa or more, and most preferably 6.4 MPa or more. . By using such conductive silicon rubber, a face head pad with improved durability can be obtained. In addition, the tensile strength in this invention is the value measured by the test method of JISK6249.

  The conductive silicon rubber used in the present invention is not particularly limited as long as the volume resistivity is 15 Ω · cm or less, the hardness is 50 to 80, and the elongation is 180% or more. Examples thereof include metals such as silver and copper, and carbon. Carbon is preferable from the viewpoints of safety and stability. As long as the volume resistivity is 15 Ω · cm or less, the hardness is 50 to 80, and the elongation is 180% or more, the content of the conductive substance in the conductive silicon rubber is not particularly limited. It is good also as weight%. Increasing the content of conductive materials such as carbon decreases the volume resistivity, while increasing the hardness and decreasing the elongation rate. As a result, the flexibility of the face / head pad tends to decrease. It is preferable to set the content appropriately according to the type of the functional substance and silicon rubber. The conductive silicone rubber used in the present invention may contain two or more kinds of conductive substances.

  In addition, as long as the volume resistivity is 15 Ω · cm or less, the hardness is 50 to 80, and the elongation is 180% or more, the type of silicone rubber in the conductive silicone rubber is not particularly limited. Examples thereof include vinyl methyl silicon rubber (VMQ), phenyl vinyl methyl silicon rubber (PVMQ), methyl silicon rubber (MQ), and fluorosilicon rubber (FVMQ). Among the conductive silicon rubbers used in the present invention, SRX539U (manufactured by Toray Dow Corning Silicone Co., Ltd.) is particularly preferable because the volume resistivity, hardness, elongation, and tensile strength are superior in a balanced manner. . Conductive silicone rubber is preferable in that it has a low water absorption, so that it can be kept hygienic by dropping the used chemicals by simply washing with water after use. In addition, the conductive silicone rubber layer of the present invention may further contain other resin and / or rubber other than silicone rubber, or may contain two or more kinds of silicone rubber.

  The thickness of the conductive silicone rubber layer in the present invention is not particularly limited. However, when the thickness of the conductive silicone rubber layer is reduced, the flexibility increases, while the volume resistivity tends to increase. It is preferable to do. The degree of the appropriate thickness depends on the conductive material used for the conductive silicon rubber layer or the like, the type of silicon rubber, etc., and cannot be generally stated. However, when SRX539U is used, the thickness is 0.2. -1.0 mm is preferable, 0.3-0.7 mm is more preferable, and 0.5 mm is further preferable.

The insulating support layer in the present invention is not particularly limited as long as it is a layered insulating support. The electrical resistance of the insulating support in the present invention is not particularly limited. For example, the volume resistivity is 1 × 10 ⁴ Ω · cm or more, more preferably 1 × 10 ⁸ Ω · cm or more. The hardness of the insulating support is not particularly limited, but the hardness may be 50 to 80, preferably 50 to 77, more preferably 55 to 69, and still more preferably 56 to 66. Further, the elongation percentage of the insulating support is not particularly limited, but may be 300% or more, preferably 400% or more, and more preferably 500% or more.

  The type of the insulating support is not particularly limited, but from the viewpoint of the balance between flexibility and strength (durability), it is preferably an insulating resin, more preferably an insulating rubber, and insulating (non-conductive) ) Silicon rubber is more preferable, and DY32-816U (manufactured by Toray Dow Corning Silicone Co., Ltd.) is even more preferable.

  The thickness of the insulating support layer in the present invention is not particularly limited. However, when the thickness is increased, the strength increases, but the flexibility tends to decrease. The thickness of the appropriate thickness depends on the flexibility and strength of the insulating support to be used, and therefore cannot be generally stated. However, when insulating silicon rubber is used, 0.3 to 1. It is preferably 8 mm, more preferably 0.5 to 1.5 mm, and even more preferably 0.7 to 1.2 mm.

  The shape of the face / head pad is not particularly limited, and can be appropriately determined according to the shape of the skin of the site to which ions are introduced. For example, in the case of a face pad, the shape is not particularly limited as long as it can be applied to the face. For example, a part that touches the eyes and mouth is cut out, and a part that touches the nose is cut to fit the face. It can be made into a simple shape. Specifically, for example, a face pad having a shape as described in FIG. In the case of a pad for scalp, the shape is not particularly limited as long as it can be applied to the scalp. For example, the pad can be sufficiently brought into contact with the scalp by forming a comb shape. Specifically, for example, a head pad having a shape described in FIG. This head pad includes an insulating material 13, a conductive silicon rubber layer 14, an electrode terminal 15, and a conductor 16. One of the electrode conductors of the ion introducer is connected to the electrode terminal 15. Further, the neck pad may be in the shape of a rectangle or the like. Note that a part of the face pad can be used as a neck pad as appropriate.

Area of the face head pad is not particularly limited and can not be said sweepingly because dependent on the site such as the skin of interest, if the facial, can be, for example, 100cm ² ~600cm ^2, also If for scalp, for ^example, it is a 10cm ² ~400cm 2.

  The shape of the conductive silicon rubber layer in the present invention is not particularly limited as long as it has a certain thickness. For example, the conductive silicon rubber layer of the head pad having a shape as shown in FIG. Any shape such as a shape formed of a curved surface or a wavy shape is included as well as a shape having a layered portion in part.

  In addition, the face head pad of the present invention may be provided with an indication that it is used for an iontophoresis device, or may be provided with an indication that it is for ion introduction of a drug or cosmetic, An indication that the medicine or cosmetic is for ion introduction in a bathroom may be attached.

  The method for producing the face head pad of the present invention is not particularly limited, and can be obtained, for example, by forming a conductive silicon layer on an insulating support layer. Further, the face head pad of the present invention may have an arbitrary configuration in addition to the insulating support layer and the conductive silicon layer as long as the effects of the present invention are not hindered. For example, the insulating support layer may have two or more layers, the conductive silicon layer may have two or more layers, or an intermediate layer may be provided between the insulating support layer and the conductive silicon layer. It may also have a coating layer on the surface of the insulating support layer.

  By using the face head pad of the present invention connected to an ion introducer, ion introduction can be suitably performed. The ion introducer in the present invention is not particularly limited as long as it has an electric circuit and a power source having both positive and negative electrode conductors. The electric circuit preferably further includes a transformer and a capacitor so that the voltage can be adjusted.

The ion introduction method is not particularly limited as long as the face head pad of the present invention is used. For example, the following two methods can be exemplified. The first method is a face head pad of the present invention in which one electrode conductor of an iontophoresis device is brought into contact with a conductive silicon rubber layer, and a drug or cosmetic is attached to the conductive silicon rubber layer. The iontophoresis device with the conductive silicon rubber layer side of the face head pad in contact with the skin of the ion introduction portion and the other electrode conductor of the ion introduction device in contact with the skin of the other portion Current can flow. The drug or cosmetic used in the first method may not be in the form of a gel, but if it is in a gel form, the drug is sufficiently adhered to the face / headpad of the present invention, so that it may be in a gel form. preferable.
On the other hand, as a second method, in addition to the face / head pad and iontophoresis device of the present invention, a sheet having water retention can be further used. In the second method, instead of using the face head pad in which the drug or cosmetic is directly attached to the conductive silicone rubber layer, the drug or cosmetic is contained in a sheet having water retention, and the sheet is made into the conductive silicone rubber. A face head pad in contact with the layer side is used. The sheet side of the face head pad with which this sheet is brought into contact is brought into contact with the skin of the ion-introducing portion, and the current of the ion introducer can be passed in the same manner as in the first method. When the second method is used, when a plurality of drugs or cosmetics are continuously ion-introduced, there is almost no need to wash the face head pad each time another drug or cosmetic is used. Can be introduced.

  The type of drug or cosmetic used for iontophoresis is not particularly limited, but examples of cosmetics include ascorbic acid, retinol, amino acids, minerals, fetic acid or derivatives thereof, placenta, and the like. Examples include anti-inflammatory agents, analgesics, and transdermal drugs such as anesthetics. Depending on the type of drug or cosmetic, there are those in which the net charge of the molecule of the drug or cosmetic becomes positive when an electric current is passed, and those that become negative. When using chemicals or cosmetics with a net charge of positive, contact a positive electrode conductor on the face / head pad side to pass a current, and when using drugs or cosmetics with a negative net charge, -By making a negative electrode conductor contact the head pad side and let an electric current flow, a chemical | medical agent or cosmetics can be osmose | permeated inside the skin using an electric repulsive force. In addition, only 1 type may be used for the chemical | medical agent and cosmetics used for ion introduction | transduction, 2 or more types of chemical | medical agents may be used, 2 or more types of cosmetics may be used, and at least 1 type may be used. You may use together the above chemical | medical agent and at least 1 or more types of cosmetics.

  The ion-introducing part is not particularly limited, and examples thereof include a face, a neck, and a scalp. In addition, the other part is not particularly limited as long as it is any part of the human body to be ion-introduced and other than the part to be ion-introduced. In the case of introduction, ears, hands, etc. can be mentioned as other parts.

  When the current applied during ion introduction changes periodically, the frequency of the current is not particularly limited, but a range of 0.5 to 1.5 kHz can be exemplified. The waveform of the applied current is not particularly limited. For example, in addition to a pulse wave such as a square wave, a complicated signal waveform such as a triangular wave or a sine wave may be used. Furthermore, a plurality of wavelengths may be given. In addition to a direct current, an alternating current may be used. Although the voltage (Vp-p) at the time of ion introduction is not particularly limited, it can be, for example, 1 to 10, preferably 2 to 8, more preferably 3 to 7, and further preferably 4 to 6. Further, the duty (ON / OFF time ratio (%)) in the case of a pulse wave or the like is not particularly limited, but may be, for example, 20 to 90%, more preferably 40 to 80%.

  The face / head pad set of the present invention comprises the face / head pad of the present invention and the sheet having the above-mentioned water retention. The sheet used in the present invention is not particularly limited as long as it has water retention. The sheet having water retention in the present invention is not particularly limited as long as it can retain moisture, but is 1/1000 or more, 1/500 or more, 1/100 or more, preferably 1/100 or more of the weight of the sheet. It means a sheet that may contain a weight of 1/50 or more, more preferably 1/30 or more, even more preferably 1/10 or more, and most preferably the same weight as the sheet.

  The material of the sheet is not particularly limited, and examples thereof include cotton, cloth, paper, and non-woven fabric. Among these, cotton can be preferably exemplified. The material of the sheet may be one kind or may contain two or more kinds. In addition, the sheets may be used one by one, or two or more sheets of the same or different materials may be stacked and used at once, or one may be folded.

  The shape of the sheet in the face / head pad set of the present invention is not particularly limited, but can be matched to the shape of the face / head pad. The sheet may be sized to cover the entire face / head pad or may be smaller than the face / head pad.

  Although the sheet | seat in the face head pad set of this invention may not contain the chemical | medical agent or cosmetics, it may contain the chemical | medical agent or cosmetics. For example, like a wet tissue, if a sheet is preliminarily immersed in a medicine or cosmetic in a container, it can be used immediately after being taken out from the container.

  Further, the face / head pad set of the present invention may be provided with an indication that it is used for an iontophoresis device, or may be provided with an indication that it is for ion introduction of a drug or cosmetic. In addition, an indication that the drug or cosmetic is for ion introduction in a bathroom may be attached.

  The iontophoresis device of the present invention includes the face head pad of the present invention or the face head pad set of the present invention and an ion introducer. The iontophoresis device of the present invention is not particularly limited as long as it includes the face head pad of the present invention or the face head pad set of the present invention and an arbitrary ion introducer. The ion introducer is not particularly limited as long as it has an electric circuit and a power source having both positive and negative electrode conductors. The electric circuit preferably further includes a transformer so that the voltage can be adjusted.

  The frequency of the current that can be applied by the iontophoresis device used in the iontophoresis device of the present invention is not particularly limited, but a range of 0.5 to 1.5 kHz can be exemplified. The waveform of the applied current is not particularly limited. For example, in addition to a pulse wave such as a square wave, a complex signal waveform such as a triangular wave or a sine wave may be used, and a plurality of wavelengths may be given. The current that can be applied by the ion introducer may be a direct current or an alternating current. The voltage (Vp-p) that can be applied by the ion introducer is not particularly limited, but is, for example, 1 to 10, preferably 2 to 8, more preferably 3 to 7, and further preferably 4 to 6. Further, the duty (ON / OFF time ratio (%)) when the current applied by the ion introducer is a pulse wave or the like is not particularly limited, but is, for example, 20 to 90%, more preferably 40 to 80%. . Thereby, a medicine can be ion-introduced more efficiently. The ion introducer used in the present invention may be an ion introducer capable of introducing ions without being connected to the pad or pad set of the present invention.

  The method of ion-introducing the drug or cosmetic of the present invention is characterized by using the iontophoresis device of the present invention. The method of the present invention is not particularly limited as long as the iontophoresis device of the present invention is used. For example, the following method can be exemplified.

The first method is a face head pad of the present invention in which one electrode conductor of an iontophoresis device is brought into contact with a conductive silicon rubber layer, and a drug or cosmetic is attached to the conductive silicon rubber layer. The iontophoresis device with the conductive silicon rubber layer side of the face head pad in contact with the skin of the ion introduction portion and the other electrode conductor of the ion introduction device in contact with the skin of the other portion Current can flow. The drug or cosmetic used in the first method may not be in the form of a gel, but if it is in a gel, the drug or cosmetic is sufficiently adhered to the face / head pad of the present invention. Preferably there is.
As the second method, in addition to the face head pad and the ion introducer of the present invention, a sheet having water retention can be further used. In the second method, instead of using the face head pad in which the drug or cosmetic is directly attached to the conductive silicone rubber layer, the drug or cosmetic is contained in a sheet having water retention, and the sheet is made into the conductive silicone rubber. A face head pad in contact with the layer side is used. The sheet side of the face head pad with which this sheet is brought into contact is brought into contact with the skin of the ion-introducing portion, and the current of the ion introducer can be passed in the same manner as in the first method. When the second method is used, when a plurality of drugs or cosmetics are continuously ion-introduced, there is almost no need to wash the face head pad each time another drug or cosmetic is used. Can be introduced.

The iontophoresis device of the present invention may further include a waterproof container in addition to the face / head pad or face headset of the present invention and the iontophoresis device. By inserting the ion introducer into the waterproof container and taking out the connection cord from the waterproof container, the ion introduction can be performed without damaging the ion introducer even in a place where the ion introducer may get wet. The shape, material, etc. of the waterproof container are not particularly limited as long as the waterproof effect is such that the ion introducer is not damaged.
The method of the present invention also includes a method of ion-introducing a drug or cosmetic, wherein the iontophoresis device of the present invention is used in a bathroom. During bathing, the pores of the skin are wide open so that ions can be introduced more effectively. The ion introduction apparatus of the present invention may have a display indicating that it is for ion introduction in a bathroom of a medicine or cosmetic.

  EXAMPLES Hereinafter, although an Example demonstrates this invention more concretely, the technical scope of this invention is not limited to these illustrations.

(1) Face pad After first forming a conductive silicon rubber layer (thickness 0.5 mm) made of SRX539U (manufactured by Toray Dow Corning Silicone Co., Ltd.), DY32-816U (insulating silicon rubber) is formed on the surface. : Toray Dow Corning Silicone Co., Ltd.) was used to secondarily form an insulating support layer (thickness: 1.0 mm). The residual active group in the conductive silicon rubber layer is co-vulcanized with the compound in the insulating silicon rubber, so that the conductive silicon rubber layer and the insulating silicon rubber layer are bonded without using an adhesive. The obtained pad was processed into the shape shown in FIG. 1 to obtain the face pad of the present invention. The area of one side of this face pad was about 400 cm ² . The resistance of this face pad was measured and found to be about 500 ohms. Note that SRX539U has a volume resistivity of 3.5 Ω · cm, a hardness of 64, an elongation of 250%, and a tensile strength of 5.0 MPa. DY32-816U has a volume resistivity of about 1 × 10 ¹⁵ Ω · cm, a hardness of 61, an elongation of 527%, and a tensile strength of 9.3 MPa. The volume resistivity, hardness, elongation rate, and tensile strength were measured in accordance with JIS K 6249.

(2) Ion introducer As an ion introducer equipped with an electric circuit having both positive and negative electrode conductors and a power source, it is shown in FIG. 2 (front view), FIG. 3 (side view) and FIG. 4 (rear view). An ion introducer was prepared. This ion introducer includes a cotton puff plate 1, a power switch 2, a polarity switch 3, a buzzer volume adjustment switch 4, an output adjustment switch 5, an external terminal, a hand plate, a monitor lamp, and a battery cover. If this ion introducer is in a narrow range, ions can be introduced without using the face / head pad of the present invention. That is, when a cotton puff or the like impregnated with a chemical is applied to the cotton puff plate, the cotton puff is brought into contact with the skin of the site to be ion-introduced, and the power switch is turned on with a finger or the like in contact with the hand plate. Current flows from the cotton puff plate to the hand plate via the skin and human body, and the drug is ion-introduced. Further, the direction of the current can be switched in the reverse direction by switching the polarity switch. The monitor lamp blinks when current flows from the cotton puff plate to the hand plate via the skin and human body, or vice versa. That is, by confirming that the monitor lamp is blinking, it is possible to confirm that ion introduction has been performed. A buzzer sounds when ion introduction is complete. In addition, by switching the output adjustment switch, the output is changed to “L” mode (Vp-p 4; duty 50%), “M” mode (Vp-p 6; duty 50%), “H” mode (Vp-p 6; duty 75%).

(3) Iontophoresis device FIG. 5 shows an iontophoresis device. One electrode conductor of the above-described ion introducer is connected to the face pad, and the other electrode conductor is used in contact with the other part of the body.

(4) Measurement of voltage waveform Ions were actually introduced using the above-described iontophoresis device, and it was examined whether or not ion introduction was uniformly performed on the entire face pad. Specifically, the procedure was as follows.
Contact the cotton sheet soaked with a cosmetic solution (placental, mixed solution of ascorbic acid, amino acid, and fetic acid) on the conductive silicone rubber layer side of the face pad to which one electrode conductor of the iontophoresis device is connected. I let you. The power switch of the iontophoresis device with the sheet side of the face pad in contact with the cotton sheet in contact with the skin of the face so as to cover the face and the other electrode conductor in contact with the ear of the subject. The ion was introduced. The voltage at the time of ion introduction was measured to obtain a voltage waveform. The respective voltage waveforms when the output is set to the “L” mode, the “M” mode, and the “H” mode are shown in FIGS. 6, 7, and 8, respectively. The voltage frequency was about 1 kHz. This time, ion introduction was performed using a similar ion introducer without using a face pad. That is, a cotton sheet soaked with the same drug solution is placed on a cotton puff plate that is one electrode of the iontophoresis device, and the finger of the subject is in contact with the hand plate that is the other electrode. Ion introduction was performed by turning on the power switch. The area of the cotton puff plate is approximately 5.5 cm ² .
When the voltage at the time of ion introduction was measured, voltage waveforms similar to those obtained when the pad was used for each of the “L” mode, “M” mode, and “H” mode were obtained.
Even when the face pad was used, a voltage waveform without disturbance was obtained in the same way as when the face pad was not used. It was shown that the ion can be introduced uniformly.

It is a figure which shows the shape of the face pad of this invention. It is a front view of the iontophoresis device of the present invention. It is a side view of the iontophoresis device of the present invention. It is a rear view of the iontophoresis device of the present invention. It is a figure which shows the iontophoresis apparatus of this invention. It is a figure which shows the voltage waveform at the time of ion introduction ("L" mode). It is a figure which shows the voltage waveform at the time of ion introduction ("M" mode). It is a figure which shows the voltage waveform ("H" mode) at the time of ion introduction. It is a figure which shows the shape of the head pad of this invention. It is a figure which shows the electroconductive silicone rubber layer of the head pad of this invention on the opposite side to the side which is in contact with the insulating material. It is a side view of the conductive silicone rubber layer of the head pad of the present invention.

Explanation of symbols

1 Cotton puff plate 2 Power switch 3 Polarity switch 4 Buzzer volume adjustment switch 5 Output adjustment switch 6 External terminal 7 Hand plate 8 Monitor lamp 9 Battery cover 10 Face pad 11 Ion introducer 12 Connection cord 13 Insulating material 14 Conductive silicone rubber layer 15 Electrode terminal 16 Conductor

Claims (16)

A face head pad used for an iontophoresis device, comprising an insulating support layer and a conductive silicon rubber layer, wherein the volume resistivity of the conductive silicon rubber in the conductive silicon rubber layer is 15 Ω · cm or less, a hard A face / head pad having a degree of strength of 50 to 80 and an elongation of 180% or more. 2. The face head pad according to claim 1, wherein the tensile strength of the conductive silicone rubber is 5.0 MPa or more. 3. The face head pad according to claim 1, wherein the conductive silicon rubber of the conductive silicon rubber layer is a conductive silicon rubber containing carbon. The face head pad according to any one of claims 1 to 3, wherein the conductive silicon rubber layer has a thickness of 0.2 to 1.0 mm. The face / head pad according to claim 1, wherein the insulating support layer is an insulating resin layer. 6. The face head pad according to claim 5, wherein the insulating resin layer is an insulating silicon rubber layer. The face head pad according to claim 6, wherein the insulating silicon rubber layer has a thickness of 0.3 to 1.8 mm. The face head pad according to any one of claims 1 to 7, wherein a drug or a cosmetic is attached to the surface of the conductive silicone rubber layer opposite to the surface in contact with the insulating support. 9. The face head pad according to claim 8, wherein the medicine or cosmetic is in a gel form. A face / head pad set for use in an iontophoresis device, comprising the face / head pad according to claim 1 and a sheet having water retention. The face / head pad set according to claim 10, wherein the sheet having water retention property is made of cotton. 12. The face / head pad set according to claim 10, wherein the sheet having water retention contains a drug or a cosmetic. An iontophoresis device comprising the face / headpad according to any one of claims 1 to 9 or the face / headpad set according to any one of claims 10 to 12 and an iontophoresis device. . The iontophoresis device according to claim 13, further comprising a waterproof container that can store the iontophoretic device. 15. A method of ion-introducing a drug or a cosmetic comprising using the iontophoresis device according to claim 13 or 14. 15. A method for ion-introducing a drug or a cosmetic comprising using the iontophoresis device according to claim 14 in a bathroom.