JPH04221529A - Manufacture of pad for bioelectric electrode and device therefor - Google Patents

Abstract

PURPOSE:To enhance the mass productivity of bioelectric electrodes. CONSTITUTION:At first step, an insulating substrate sheet comprising at least a pair of moisture absorbing parts and water repellent parts other than the moisture absorbing parts, having its rear surface which is adhesive, is set on the upper surface of a die parting liner so as to bond the liner to the substrate sheet. At second step, the substrate sheet to which the liner has been bonded is impregnated with a hydrate gel liquid material having an electro-conductivity and a tackiness so as to communicate the liquid material on the upper side of the moisture absorbing parts with at the lower side of the moisture absorbing parts by way of the moisture absorbing parts of the substrate sheet. At step 3, the above-mentioned liquid material is solidified so as to form a biographic side gel layer having adhesiveness and tackiness and an electrode side hydrate gel layer which are coupled together through the intermediary of the moisture absorbing parts of the substrate sheet. At step 4, with the use of a predetermined punching die frame, a pad in which the above-mentioned biographic side hydrate gel layer, the electrode side hydrate gel layer, the substrate sheet and the die parting liner are integrally incorporated, is punched out.

Description

DETAILED DESCRIPTION OF THE INVENTION [I] Industrial Application Field The present invention relates to a method and apparatus for manufacturing a pad for a bioelectrode, and particularly focuses on the moisture absorbing portion of a base sheet having a moisture absorbing portion and a water repellent portion. The present invention relates to a method and an apparatus for manufacturing a two-layer bioelectrode pad by impregnating a hydrogel stock solution and preventing it from seeping into the water-repellent portion.

[II] Conventional technology In general, a bioelectrode pad is formed of a hydrous gel layer that has both conductivity and adhesiveness, and as shown by reference numeral 30 in FIG. 8(A), when used, it One surface 42 of the electrode plate 20 connected to the device 10 is adhered, and the other surface 41 is brought into close contact with the skin surface 50 of the living body. In this way, the electrode plate 20 is connected to a living body via the pad 30, and electrical phenomena within the living body are derived (biological induction electrode) and input to the medical device 10 (for example, when obtaining a body surface electrocardiogram). Conversely, electrical stimulation is introduced into the living body from the medical device 10 (biological stimulation electrode) to treat the living body (for example, treatment of stiff shoulders with a low frequency treatment device). However, since this pad 30 is brought into close contact with the skin surface of many patients, it is desirable to make it disposable for hygiene reasons. For this reason, the pad 30 has a two-layer structure consisting of a hydrogel layer 30A on the living body side and a hydrogel layer 30B on the electrode side, an insulating base sheet 60 is sandwiched between them, and the tip thereof is used as a gripping piece 40, and this gripping piece 40 can be held by hand. There are devices that can be easily attached to and detached from the electrode plate 20 by holding the electrode plate. Furthermore, as shown in FIG. 8(B), in addition to the gripping piece 400, the pad is made into a two-layer structure with an insulating base sheet 300 constituting the connecting member 330 interposed therebetween.
There is a device in which two pads 100 and 200 are connected to each other so that they can be easily and quickly attached to and detached from the electrode plates 500 and 600 of the small low-frequency treatment device main body 700. As mentioned above, regardless of whether it is a bioinduction electrode or a biostimulation electrode, a bioelectrode pad that has a two-layer structure with an insulating base sheet interposed therebetween must be technically mass-producible from the perspective of being disposable. No. Conventionally, when manufacturing a pad for a bioelectrode, for example, the pad 100, 200 was formed. An example of the insulating base material sheet 300 is a nonwoven fabric, and the living body side hydrogel layer and the electrode side hydrogel layer 110 and 120 and 210 and 220 are bonded to each other through a mesh of the nonwoven fabric to form a two-layer structure. It had a structure.

[III] Problems to be Solved by the Invention In the prior art described above, a nonwoven fabric was used as an example of the insulating base sheet 300. However, such a base sheet 3
Even if the hydrogel stock solution is injected onto 00, it will not solidify before it solidifies.
In many cases, the undiluted solution spreads out in all directions and oozes out. For this reason, the pad 100 formed of the hydrous gel after solidification,
The shape of the 200 is distorted and the edges appear crushed. Therefore, the pad for a bioelectrode has an irregular shape and is not suitable for mass production. An object of the present invention is to improve the mass productivity of bioelectrode pads.

[IV] Means for solving the problem The above problem is solved by the first step (A
), at least two pairs of moisture absorption parts 311 and 312, 31
3 and 314 and a water-repellent portion 315 other than the moisture-absorbing portion, and an insulating base sheet 300 having adhesive properties on the back surface of the water-repellent portion 315 is placed on the upper surface 4100 of the mold release liner 4000. As a result, the release liner 40 is attached to the base sheet 300.
In the second step (B), conductive and adhesive hydrogel stock solutions G1 and G2, G3 and G4 are infiltrated into the base sheet 300 to which the release liner 4000 is adhered. Moisture absorption parts 311 and 31 of base sheet 300
2, 313 and 314 to communicate the undiluted solution on the upper side and the lower side of the moisture absorption part, and in the third step (C), the above undiluted solution is solidified and the undiluted solution is made to communicate with the moisture absorption parts 311, 312, 31 of the base sheet 300.
3 and 314, the conductive and adhesive hydrogel layer on the living body side and the hydrogel layer on the electrode side 110A and 120A
, 210A and 220A, 110B and 120B, 210B
and 220B, and in the fourth step (E), the living body side hydrogel layer, the electrode side hydrogel layer, the base sheet, and the release liner are integrated into a pad PA using predetermined punching molds kA and kB. , a method for manufacturing a pad for a bioelectrode characterized in that a PB is punched out, and in the first step (A) which is the second invention shown in FIG.
11 and 312, 313 and 314, and an insulating base sheet 300 having a water-repellent part 315 other than the moisture-absorbing part and having adhesive properties on the back surface of the water-repellent part 315, is placed in a predetermined position corresponding to the moisture-absorbing part. recesses 1110 and 1120 having a depth dimension D of
, 1130 and 1140 are placed on the upper surface 1100 of the lower formwork 1000 on which the lower formwork 1000 is bonded.In the second step (B), the lower formwork 1000 is bonded. Through holes 2110, 2120, 2 corresponding to the moisture absorption parts 311, 312, 313, and 314 and having a predetermined depth dimension E are formed on the base sheet 300.
Lower surface 2 of upper formwork 2000 where 130 and 2140 are formed
In the third step (C), conductive and adhesive hydrogel stock solutions G1 and G2, G3 and G4 are placed on the lower formwork 1.
By infiltrating the base material sheet 300 on which 000 is adhered and the upper formwork 2000 is placed, the undiluted solution is absorbed into the recess side of the lower formwork through the moisture absorption parts 311 and 312, 313 and 314 of the base material sheet 300. The raw solution on the through-hole side of the upper formwork was communicated with the raw solution, and in the fourth step (D), the raw solution was solidified and bonded to each other via the moisture absorption parts 311 and 312, and 313 and 314 of the base sheet 300. A conductive and adhesive hydrogel layer on the living body side and a hydrogel layer on the electrode side 110A and 120A, 210A and 220A, 110B and 120B, and 210B and 220B are formed, and in the fifth step (E), the above upper formwork 2000 is formed. The pads PA and PB are then punched out using predetermined punching molds kA and kB, using the living body-side hydrogel layer, the electrode-side hydrogel layer, the base sheet, and the lower mold as one body. and at least two pairs of moisture absorption parts 311 and 3 according to the third invention shown in FIG.
12, 313 and 314 and a water repellent part 315 other than the moisture absorbing part
and recesses 1110, 1120, 113 corresponding to the moisture absorbing portions and having a predetermined depth dimension D.
0 and 1140, and a through hole 211 corresponding to the moisture absorption part and having a predetermined depth dimension E.
0, 2120, 2130, and 2140, and the base sheet 300 is adhered onto the upper surface 1100 of the lower form 1000, and the upper form 2000 is bonded onto the base sheet 300. Place the bottom surface 2100,
The problem is solved by a bioelectrode pad manufacturing device that is capable of being immersed in a conductive and sticky hydrogel stock solution.

[V] Effect As described above, according to the present invention, the undiluted water-containing gel solution is concentrated only in the moisture-absorbing areas of a base sheet having a moisture-absorbing area and a water-repellent area, and is prevented from seeping into the water-repellent areas. A method and apparatus for manufacturing a double-layer bioelectrode pad are provided (
Figures 1 to 3). According to the above configuration, as shown by the arrows in FIG. 4, the hydrogel stock solution concentrates and permeates only the moisture absorbing parts 311 and 312 of the base sheet 300,
It is repelled from the water-repellent portion 315 and no longer bleeds in all directions. Therefore, unlike in the past, a number of bioelectrode pads can now be manufactured without losing the shape of the pad portion formed of the solidified hydrogel. Therefore, according to the present invention, the mass productivity of bioelectrode pads has been greatly improved.

[VI] Examples The present invention will now be described by way of examples with reference to the accompanying drawings.

(1) First invention FIG. 5 is a diagram showing an embodiment of the first invention.

■First step (FIG. 5(A)) By placing the insulating base sheet 300 on the upper surface 4100 of the release liner 4000, the base sheet 300
A release liner 4000 is adhered to the mold. Above base sheet 3
00 indicates at least two pairs of moisture absorption parts 311 and 312, 313 and 314, in the embodiment of FIG. 5, two or more pairs.
... and a water-repellent part 315 other than the moisture-absorbing part, and the back surface of the water-repellent part 315 has adhesive properties. Base material sheet 3
Examples of 00 include nonwoven fabrics, such as the moisture absorbing parts 311 and 312, 313 and 314, etc. of the base sheet 300.
is made of a nonwoven fabric, and the water-repellent portion 315 is made of a mixture of self-crosslinking acrylic and titanium oxide applied to the surface of the nonwoven fabric, and an acrylic adhesive applied to the back side. Further, the release liner 4000 is made of, for example, thermoplastic plastic.

(2) Second step (FIG. 5(B)) Conductive and adhesive hydrogel stock solutions G1, G2, etc. are infiltrated into the base sheet 300 to which the release liner 4000 is adhered. Specifically, the base sheet 300 to which the release liner 4000 is adhered is conveyed by a belt conveyor and immersed in a hydrogel stock solution. As a result, the base sheet 3
The stock solution above and below the moisture absorbing portions are communicated through the moisture absorbing portions 311 and 312, 313 and 314, etc. of 00. In this case, as shown by the arrow in Fig. 4, the hydrogel stock solution is
The water concentrates and permeates only into the moisture-absorbing parts 311 and 312 of the base sheet 300, and is repelled from the water-repellent part 315 so that it does not bleed in all directions. Since the back surface of the water-repellent portion 315 of the base sheet 300 has adhesive properties, the upper surface 4 of the release liner 4000
It fits perfectly with 100. Therefore, the undiluted solution below the moisture absorbing portion of the base sheet 300 does not ooze out in all directions.

The components of the above-mentioned hydrogel stock solutions G1, G2, etc. are preferably acrylic hydrogels made of a hydrophilic polymer containing 5 mol % or less of carboxylate-containing monomer units.

■Third step (FIG. 5(C)) The above stock solution is solidified and the moisture absorbing portion 311 of the base sheet 300 is
and 312, 313, 314, and so on to form a conductive and adhesive hydrogel layer on the living body side and a hydrogel layer on the electrode side. Specifically, in order to promote solidification, under a nitrogen atmosphere, a lamp (not shown) was used as shown by the arrow.
The stock solution is solidified by irradiating it with ultraviolet light for a predetermined period of time.

■Fourth step (Fig. 5 (D)) Using predetermined punching molds k1, k2, etc., the above-mentioned living body side hydrogel layer, electrode side hydrogel layer, base sheet, and release liner are integrated into a pad. Punch out P1, P2...

(2) Second invention FIG. 6 is a diagram showing an embodiment of the second invention.

■First step (Fig. 6 (A)) The insulating base material sheet 300 is placed on the upper surface 1 of the lower formwork
By placing the lower formwork 1000 on the base sheet 300, the lower formwork 1000 is adhered to the base sheet 300. The base sheet 300 is
In the embodiment shown in FIG. 6, there are at least two pairs of moisture absorbing parts 311 and 312, 313 and 314, etc., and a water repellent part 315 other than the moisture absorbing parts, and the water repellent part 31
The back surface of No. 5 has adhesive properties. An example of the base sheet 300 is a nonwoven fabric. For example, the moisture absorbing parts 311 and 312, 313 and 314, etc. of the base sheet 300 are formed of a nonwoven fabric, and the water repellent part 315 is formed by self-crosslinking on the surface of the nonwoven fabric. It is made of a mixture of molded acrylic and titanium oxide with acrylic adhesive applied to the back side. Above lower formwork 1000
are recesses 1110 and 1120, 1130 and 1 that correspond to the moisture absorbing portion of the base sheet 300 and have a predetermined depth dimension D.
It has 140... The predetermined depth dimension D of this recess, for example 1.5 mm, determines the thickness of the portions 120A, 220A, etc. (FIG. 2) of the finally formed pad under the hydrous gel. Further, the lower formwork 1000 is made of, for example, thermoplastic plastic, and the recesses 1110 and 1120, 1130 and 1140...
It is preferable that the material is water-repellent. This is because the lower formwork 1000 is commonly known as a blister pack, and the pads P1, P2, etc. can be easily peeled off from the lower formwork 1000 by applying a water-repellent finish to the recesses. It is. ■Second step (Fig. 6(B)) The upper formwork 2 is placed on the base sheet 300 to which the lower formwork 1000 is adhered.
Place the bottom surface 2100 of 000 on it. The upper formwork 2000 has moisture absorption parts 311 and 312, 313 and 31 of the base sheet 300.
It has through holes 2110 and 2120, 2130 and 2140, which correspond to No. 4 and have a predetermined depth dimension E. A predetermined depth dimension E of this recess, for example 1.5 m
m determines the thickness of the portions 110A, 210A, etc. (FIG. 2) of the finally formed pad above the hydrous gel. The upper formwork 2000 is made of, for example, thermoplastic plastic.

■ Third step (Fig. 6 (C)) Conductive and adhesive hydrogel stock solutions G1, G2... are applied to the base sheet 300 on which the lower formwork 1000 is adhered and the upper formwork 2000 is placed. Let it penetrate. Specifically, lower formwork 1
The base sheet 300 to which 000 is adhered and the upper formwork 2000 is placed is conveyed by a belt conveyor and immersed in a hydrous gel stock solution. Thereby, the stock solution on the recess side of the lower formwork and the stock solution on the through-hole side of the upper formwork are brought into communication via the moisture absorption parts 311 and 312, 313 and 314, . . . of the base sheet 300. In this case, as shown by the arrows in FIG.
It concentrates and penetrates only into the water-repellent portion 315, and is repelled from the water-repellent portion 315 and does not bleed in all directions. Water repellent portion 3 of base sheet 300
Since the back surface of 15 has adhesive properties, it tightly adheres to the upper surface 1100 of the lower formwork 1000. Therefore, the stock solution on the concave side of the lower formwork 1000 is prevented from leaking in all directions. The components of the above-mentioned hydrogel stock solutions G1, G2... are acrylic hydrogels containing 5 carboxylate-containing monomer units.
It is desirable that the hydrophilic polymer comprises less than mol%.

■Fourth step (FIG. 6(D)) The above stock solution is solidified and the moisture absorbing portion 311 of the base sheet 300 is
and 312, 313, 314, and so on to form a conductive and adhesive hydrogel layer on the living body side and a hydrogel layer on the electrode side. Specifically, in order to promote solidification, under a nitrogen atmosphere, a lamp (not shown) was used as shown by the arrow.
The stock solution is solidified by irradiating it with ultraviolet light for a predetermined period of time.

■Fifth step (Fig. 6 (E)) The above upper formwork 2000 is removed and predetermined punching forms k1, k
2..., the living body side hydrogel layer, the electrode side hydrogel layer, the base sheet, and the lower formwork are integrated into a pad P1,
Punch out P2...

(3) Third invention FIG. 7 is a diagram showing an embodiment of the third invention. The third invention includes a base sheet 300, a lower formwork 1000, and an upper formwork 2000.
It is composed of. The base sheet 300 has at least two pairs of moisture absorbing portions 311 and 312, 313 and 314, in the embodiment shown in FIG. 7, and a water repellent portion 315 other than the moisture absorbing portions. In addition, the back surface of the water-repellent portion 315 has adhesive properties. The lower formwork 1000 corresponds to the moisture absorption portion of the base sheet 300 and has a predetermined depth dimension D.
recesses 1110 and 1120, 1130 and 1140 having
···have. The predetermined depth dimension D of this recess, for example 1.5 mm, determines the thickness of the portions 120A, 220A, etc. (FIG. 2) of the finally formed pad under the hydrous gel. Further, the lower formwork 1000 is made of, for example, thermoplastic plastic, and the recesses 1110 and 1120, 1130 and 1140, . . .
It is preferable that a water-repellent finish is applied. This is because the lower formwork 1000 is commonly known as a blister pack, and by applying a water-repellent finish to the recesses, the pad P1
, P2... from the lower formwork 1000 with ease. The upper formwork 2000 has through holes 2110 and 2120 that correspond to the moisture absorption parts 311 and 312, 313 and 314, . . . of the base sheet 300 and have a predetermined depth dimension E,
2130 and 2140... Due to the predetermined depth E of this recess, for example 1.5 mm, the portions 110A, 210 above the hydrous gel of the finally formed pad
The thickness of A etc. (FIG. 2) is determined. Above upper formwork 200
0 is made of thermoplastic, for example. The lower formwork 1000 and the upper formwork 2000 have a hinge H1
, H2, and are rotatably connected. The upper surface 1100 of the lower formwork 1000 has screw holes N1 to N4, and the upper formwork 2000 has corresponding holes n1 to n4.
are respectively formed, and the lower formwork 1000 and the upper formwork 2000 can be screwed together with the base sheet 300 in between. As a result, the base sheet 300 is adhered onto the upper surface 1100 of the lower formwork 1000, and the lower surface 2100 of the upper formwork 2000 is placed on the base sheet 300.
Can be immersed in conductive and sticky hydrogel stock solution.

[VII] Effects of the Invention As described above, according to the present invention, the undiluted hydrogel solution is concentrated only in the moisture absorbing areas of a base sheet having a moisture absorbing area and a water repellent area, and is prevented from seeping into the water repellent areas. A method and an apparatus for manufacturing a two-layer bioelectrode pad have been developed (FIGS. 1 to 3). According to the above configuration, as shown by the arrows in FIG. It is repelled and no longer bleeds in all directions. Therefore, unlike in the past, a number of bioelectrode pads can now be manufactured without losing the shape of the pad portion formed of the solidified hydrogel. Therefore, according to the present invention, the technical effect of significantly improving the mass productivity of bioelectrode pads has been achieved.

[Brief explanation of the drawing]

Fig. 1 is a principle diagram of the first invention, Fig. 2 is a principle diagram of the second invention, Fig. 3 is a principle diagram of the third invention, Fig. 4 is an explanatory diagram of the operation of the present invention, and Fig. 5 is a diagram of the principle of the second invention. Figure 6 is a diagram showing an embodiment of the invention; Figure 6 is a diagram showing an embodiment of the second invention; Figure 7 is a diagram showing an embodiment of the third invention; Figure 8 is a general explanatory diagram of a two-layer pad. . In FIG. 1, 300... Base sheet, 311, 312, 313, 314... Moisture absorbing portion, 315
...Water repellent part, 4000...Release liner, G1, G2, G3, G4...Hydrogel stock solution, kA, K
B...Punching formwork, PA, PB...Bud. In FIG. 2, 300... Base sheet, 311, 312, 313, 314... Moisture absorbing section, 3
15...Water repellent part, 1000...Lower formwork, 2000...Upper formwork, G1, G2, G3, G4... Hydrogel stock solution, kA, k
B...Punching formwork, PA, PB...Bud. In FIG. 3, 300...Base sheet, 311, 312, 313, 314...Moisture absorption part, 3
15...Water repellent portion, 1000...Lower formwork, 2000...Upper formwork.

Claims (14)

[Claims] (1) In the first step (A), there are at least two pairs of moisture absorbing parts 311 and 312, 313 and 314, and a water repellent part 315 other than the moisture absorbing parts, and the back surface of the water repellent part 315 has adhesive properties. The insulating base sheet 300 is coated with a release liner 40.
The release liner 4000 is adhered to the base sheet 300 by placing it on the upper surface 4100 of 00, and the second step (B
), conductive and adhesive hydrogel stock solutions G1 and G2, G
3 and G4 into the base sheet 300 to which the release liner 4000 is adhered.
The stock solution on the upper side and the lower side of the moisture absorbing parts are communicated through the moisture absorbing parts 311 and 312, 313 and 314 of C.
), the above-mentioned stock solution is solidified to form a conductive and adhesive hydrogel layer on the living body side and the hydrogel layer on the electrode side 110A, which are interconnected through the moisture absorption parts 311 and 312, 313 and 314 of the base sheet 300. 120A, 210A and 220A, 110
B and 120B, 210B and 220B are formed, and in the fourth step (E), the above-mentioned living body side hydrogel layer, electrode side hydrogel layer, base sheet, and mold release liner are formed using predetermined punching molds kA and kB. A method of manufacturing a pad for a bioelectrode, characterized in that pads PA and PB are punched out as one body. (2) Moisture absorption parts 311 and 31 of the base sheet 300
2, 313 and 314 are formed of nonwoven fabric, and the water repellent portion 315
2. The method of manufacturing a bioelectrode pad according to claim 1, wherein said nonwoven fabric is coated with a mixture of self-crosslinking acrylic and titanium oxide on the surface thereof, and an acrylic adhesive on the back surface thereof. (3) The method for manufacturing a bioelectrode pad according to claim 1, wherein the release liner 4000 is made of thermoplastic plastic. (4) The bioelectrode according to claim 1, wherein the components of the hydrogel stock solutions G1 and G2, G3 and G4 are acrylic hydrogels, and the carboxylate-containing monomer units are composed of a hydrophilic polymer of 5 mol% or less. Method of manufacturing pads. (5) In the first step (A), there are at least two pairs of moisture absorbing parts 311 and 312, 313 and 314 and a water repellent part 315 other than the moisture absorbing parts, and the back surface of the water repellent part 315 has adhesive properties. An insulating base sheet 300 is placed in recesses 1110 and 11 corresponding to the moisture absorbing portion and having a predetermined depth dimension D.
20, lower formwork 1000 in which 1130 and 1140 are formed
By placing the base sheet 30 on the upper surface 1100 of
In the second step (B), the moisture absorption parts 311, 312, 31 are placed on the base sheet 300 to which the lower formwork 1000 is adhered.
3 and 314 and having through holes 2110 and 2120, 2130 and 2140 formed therein, the lower surface 2100 of the upper formwork 2000 is placed, and the third step (C
), conductive and adhesive hydrogel stock solutions G1 and G2, G
3 and G4 are glued together by the lower formwork 1000 and the upper formwork 200
By permeating the base material sheet 300 on which 0 is placed, the moisture absorbing parts 311, 312,
3 and 314, the stock solution on the recess side of the lower formwork and the stock solution on the through-hole side of the upper formwork are communicated, and in the fourth step (D), the stock solution is solidified to form the base sheet 300. The conductive and adhesive hydrogel layer on the living body side and the hydrogel layer on the electrode side 110 are interconnected through the moisture absorption parts 311 and 312, 313 and 314.
A and 120A, 210A and 220A, 110B and 120
In the fifth step (E), the upper mold 2000 is removed, and predetermined punching molds kA and kB are used to form the living body side hydrogel layer, the electrode side hydrogel layer and the base. A method for manufacturing a pad for a bioelectrode, characterized in that pads PA and PB are punched out from a material sheet and a lower mold as one body. (6) Moisture absorption parts 311 and 31 of the base sheet 300
2, 313 and 314 are formed of nonwoven fabric, and the water repellent portion 315
6. The method for producing a bioelectrode pad according to claim 5, wherein said nonwoven fabric is coated with a mixture of self-crosslinking acrylic and titanium oxide on the surface thereof, and an acrylic adhesive on the back surface thereof. (7) The lower formwork 1000 is made of thermoplastic plastic, and the recesses 1110 and 1120
, 1130 and 1140 are subjected to a water-repellent finish. 6. The method for manufacturing a pad for a bioelectrode according to claim 5. (8) The method for manufacturing a bioelectrode pad according to claim 5, wherein the upper mold frame 2000 is made of thermoplastic plastic. (9) The bioelectrode according to claim 5, wherein the components of the hydrogel stock solutions G1 and G2, G3 and G4 are acrylic hydrogels, and the carboxylate-containing monomer units are comprised of a hydrophilic polymer of 5 mol% or less. Method of manufacturing pads. (10) at least two pairs of moisture absorption parts 311 and 312;
313 and 314 and an insulating base sheet 300 having a water-repellent part 315 other than the moisture-absorbing part and having an adhesive back surface of the water-repellent part 315, and a predetermined depth dimension corresponding to the moisture-absorbing part. Recesses 1110 and 1120, 1130 and 1 with D
140 is formed, and through holes 2110 and 2 corresponding to the moisture absorbing portion and having a predetermined depth dimension E are formed.
Upper formwork 200 in which 120, 2130 and 2140 are formed
0, and the base sheet 300 is adhered onto the upper surface 1100 of the lower formwork 1000, and the base sheet 3
An apparatus for manufacturing a pad for a bioelectrode, characterized in that a lower surface 2100 of an upper formwork 2000 is placed on top of the bottom surface 2100 so that it can be immersed in a conductive and sticky hydrogel stock solution. (11) Moisture absorption parts 311 and 3 of the base sheet 300
12, 313 and 314 are formed of nonwoven fabric, and the water repellent portion 31
11. The bioelectrode pad manufacturing apparatus according to claim 10, wherein 5 is a mixture of self-crosslinking acrylic and titanium oxide applied to the surface of the nonwoven fabric, and an acrylic adhesive is applied to the back surface of the nonwoven fabric. (12) The lower formwork 1000 is made of thermoplastic plastic, and its recesses 1110 and 112
11. The bioelectrode pad manufacturing apparatus according to claim 10, wherein the pads 0, 1130, and 1140 are treated with a water repellent finish. (13) The bioelectrode pad manufacturing apparatus according to claim 10, wherein the upper mold frame 2000 is made of thermoplastic plastic. (14) The apparatus for producing a pad for a bioelectrode according to claim 10, wherein the component of the hydrogel stock solution is an acrylic hydrogel, and the carboxylate-containing monomer unit is comprised of a hydrophilic polymer of 5 mol% or less.