JP2013171821A - Device and method for manufacturing membrane electrode assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress manufacturing cost of a membrane electrode assembly.SOLUTION: A method for manufacturing a membrane electrode assembly used for a fuel cell includes the steps of: peeling a back sheet from a multi-layer sheet including an electrolyte membrane or catalyst electrode layer formed on the back sheet; and disposing the back sheet after peeling on one face of a strip-like membrane electrode assembly sheet to wind the membrane electrode assembly sheet together with the back sheet into a roll.

Description

  The present invention relates to a manufacturing apparatus and a manufacturing method for a membrane electrode assembly used in a fuel cell.

  In a membrane electrode assembly used in a fuel cell, catalyst electrode layers (anode and cathode) are formed on both surfaces of an electrolyte membrane. As a manufacturing method of this membrane electrode assembly, a plurality of membrane electrode assemblies are formed by superimposing a catalyst electrode layer formed on a carrier film on both sides of a belt-shaped electrolyte membrane, and heating and pressing with a roller. A continuous production method is known. When manufacturing a membrane electrode assembly, when winding the strip-shaped membrane electrode assembly into a roll, a spacer sheet is arranged on one surface of the membrane electrode assembly to prevent contact between the anode and the cathode. A technique for co-winding is known (Patent Document 1).

JP 2011-028915 A JP 2010-131922 A

  However, the conventional technology still has room for improvement in terms of reducing the manufacturing cost of the membrane electrode assembly.

  The present invention has been made to solve the above-described problems, and an object thereof is to reduce the manufacturing cost of the membrane electrode assembly.

  In order to solve at least a part of the above problems, the present invention can be realized as the following aspects or application examples.

[Application Example 1]
A method for producing a membrane electrode assembly used in a fuel cell,
Peeling the backsheet from a multilayer sheet in which an electrolyte membrane or a catalyst electrode layer is formed on the backsheet;
A step of disposing the back sheet after peeling on one surface of a strip-shaped membrane electrode assembly sheet, and winding the membrane electrode assembly sheet into a roll together with the back sheet.

  According to this configuration, since the peeled back sheet is reused as a spacer sheet when winding the belt-like membrane electrode assembly sheet into a roll shape, the manufacturing cost of the membrane electrode assembly can be suppressed. it can.

[Application Example 2]
The manufacturing method according to claim 1,
A first step of forming the first sheet by peeling the first auxiliary sheet from a multilayer sheet having an electrolyte membrane formed on the first auxiliary sheet;
A second step of forming the second sheet by joining the multilayer sheet in which the catalyst electrode layer is formed on the second auxiliary sheet and the first sheet;
A third step of forming a third sheet as the membrane electrode assembly sheet by peeling the second auxiliary sheet from the second sheet;
The first auxiliary sheet or the second auxiliary sheet after peeling is used as the back sheet, and is arranged on one surface of the third sheet, and the third sheet is rolled together with the back sheet. A fourth step of winding.

  According to this configuration, since the first auxiliary sheet or the second auxiliary sheet after being peeled is reused as a spacer sheet when the third sheet is wound into a roll, the manufacturing cost of the membrane electrode assembly is reduced. Can be suppressed.

[Application Example 3]
In the manufacturing method described in Application Example 2,
In the fourth step, the surface of the second auxiliary sheet opposite to the surface on which the catalyst electrode layer is formed is opposite to the surface of the third sheet on which the catalyst electrode layer is formed. The manufacturing method includes a step of disposing the second auxiliary sheet on one surface of the third sheet so as to face the side surface.

  According to this configuration, the surface of the second auxiliary sheet that has been in contact with the catalyst electrode layer that is one of the anode and the cathode is in contact with the catalyst electrode layer that is the other of the anode and the cathode in the third sheet. Since it can suppress, the fall of the quality of a membrane electrode assembly can be suppressed.

[Application Example 4]
An apparatus for manufacturing a membrane electrode assembly used in a fuel cell,
A peeling portion for peeling the back sheet from a multilayer sheet in which an electrolyte membrane or a catalyst electrode layer is formed on the back sheet;
A manufacturing apparatus comprising: a winding unit that winds the membrane electrode assembly sheet in a roll shape together with the back sheet in a state where the back sheet after peeling is disposed on one surface of the strip-shaped membrane electrode assembly sheet .

  According to this configuration, since the peeled back sheet is reused as a spacer sheet when winding the belt-like membrane electrode assembly sheet into a roll shape, the manufacturing cost of the membrane electrode assembly can be suppressed. it can.

[Application Example 5]
The manufacturing apparatus of Application Example 4 further includes
The manufacturing apparatus provided with the conveyance roller for conveying the said back sheet peeled in the said peeling part to the said winding-up part.

  According to this configuration, the peeled back sheet can be easily conveyed to the winding unit by the conveying roller.

[Application Example 6]
An apparatus for manufacturing a membrane electrode assembly used in a fuel cell,
A first peeling portion for forming a first sheet by peeling the first auxiliary sheet from a first multilayer sheet having an electrolyte membrane formed on the first auxiliary sheet;
A second multilayer sheet in which a catalyst electrode layer is formed on a second auxiliary sheet, and a joining portion that forms a second sheet by joining the first sheet;
A second peeling portion that forms a third sheet by peeling the second auxiliary sheet from the second sheet;
The third auxiliary sheet and the second auxiliary sheet together with the first auxiliary sheet or the second auxiliary sheet in a state where the first auxiliary sheet or the second auxiliary sheet after peeling is disposed on one surface of the third sheet. And a winding unit for winding the sheet into a roll.

  According to this configuration, since the first auxiliary sheet or the second auxiliary sheet after being peeled is reused as a spacer sheet when the third sheet is wound into a roll, the manufacturing cost of the membrane electrode assembly is reduced. Can be suppressed.

[Application Example 7]
The manufacturing apparatus of Application Example 6 further includes
The first conveying roller for conveying the first auxiliary sheet after being peeled off at the first peeling portion to the winding portion, or the second peeling off at the second peeling portion. The manufacturing apparatus provided with the 2nd conveyance roller for conveying an auxiliary | assistant sheet | seat to the said winding-up part.

  According to this configuration, the auxiliary sheet after peeling can be easily conveyed to the winding unit by the conveying roller.

  The present invention can be realized in various modes. For example, a method for winding a membrane electrode assembly, a winding device for a membrane electrode assembly, a method for manufacturing a fuel cell, a device for manufacturing a fuel cell, etc. Can be realized.

It is explanatory drawing for demonstrating schematic structure of the membrane electrode assembly manufacturing apparatus of 1st Example. It is explanatory drawing for demonstrating the state of the 4th sheet | seat wound up in the 1st winding-up part. It is explanatory drawing for demonstrating schematic structure of the membrane electrode assembly manufacturing apparatus of a comparative example. It is explanatory drawing for demonstrating the property of a 1st auxiliary sheet and electrolyte membrane. It is explanatory drawing for demonstrating schematic structure of the membrane electrode assembly manufacturing apparatus of 2nd Example.

A. First embodiment:
FIG. 1 is an explanatory diagram for explaining a schematic configuration of the membrane electrode assembly manufacturing apparatus of the first embodiment.
The membrane electrode assembly manufacturing apparatus 100 is a device for manufacturing a membrane electrode assembly (MEA) used in a fuel cell, and includes a first peeling unit 110, a junction unit 130, and a second unit. The peeling part 140 and the arrangement part 150 are provided. The membrane electrode assembly manufacturing apparatus 100 uses the first multilayer sheet WU1 sent out from the first unwinding part RO1 and the second multilayer sheet WU2 sent out from the second unwinding part RO2. The sheet | seat W3 of a membrane electrode assembly is manufactured. Moreover, the sheet | seat W3 of the manufactured membrane electrode assembly is wound up in roll shape in 1st winding part RI1 with 1st auxiliary sheet S1 which peeled from 1st multilayer sheet WU1.

  In the first multilayer sheet WU1, the band-shaped first sheet W1 is formed on the band-shaped first auxiliary sheet S1. The first auxiliary sheet S1 is a back sheet used for maintaining the strength of the first sheet W1, and is a polyester such as PET (polyethylene terephthalate) or PEN (polyethylene naphthalate), or a polymer such as polystyrene. It can be formed by a film. The first sheet W1 is an electrolyte membrane with a catalyst electrode layer in which a first catalyst electrode layer M2 is formed on a sheet of a strip-shaped electrolyte membrane M1. The electrolyte membrane M1 can be formed of a solid polymer electrolyte material having good proton conductivity in a wet state. As the solid polymer electrolyte material, for example, a fluorine-based resin (for example, Nafion, manufactured by DuPont) provided with perfluorocarbon sulfonic acid can be used. As the first catalyst electrode layer M2 of this embodiment, a plurality of rectangular catalyst electrode layers M2p formed at regular intervals is used. The first catalyst electrode layer M2 includes carbon particles (catalyst support carrier) supporting a catalyst metal (for example, platinum or platinum alloy) for promoting an electrochemical reaction, and a polymer electrolyte (for example, fluorine) having proton conductivity. Based resin). The first catalyst electrode layer M2 is used as a cathode of the fuel cell. The first sheet W1 can be produced by applying the catalyst electrode layer material constituting the first catalyst electrode layer M2 on the electrolyte membrane M1. The width D1 of the first multilayer sheet WU1 is the width of the electrolyte membrane M1 and the first auxiliary sheet S1.

  The second multilayer sheet WU2 is a catalyst electrode layer sheet in which a band-shaped second catalyst electrode layer M3 is formed on a band-shaped second auxiliary sheet S2. The second auxiliary sheet S2 is a back sheet used for maintaining the strength of the second catalyst electrode layer M3, and can be formed of a polymer film such as PET or PTFE (polytetrafluoroethylene). . Similar to the first catalyst electrode layer M2, the second catalyst electrode layer M3 can be formed of carbon particles carrying a catalyst metal and a polymer electrolyte. The second catalyst electrode layer M3 is used as an anode of the fuel cell. The second multilayer sheet WU2 can be produced by coating the catalyst electrode layer material constituting the second catalyst electrode layer M3 on the second auxiliary sheet S2.

  The first peeling unit 110 includes a conveyance roller 111 and a peeling roller 112. The conveyance roller 111 is in contact with the surface on which the first catalyst electrode layer M2 of the first multilayer sheet WU1 fed out from the first unwinding section RO1 is formed, and the conveyance direction of the first multilayer sheet WU1 In the direction of the joint 130. The peeling roller 112 is disposed at a position close to the conveying roller 111 via the first multilayer sheet WU1, and peels the first auxiliary sheet S1 from the first multilayer sheet WU1. The peeled first auxiliary sheet S1 is conveyed to the arrangement unit 150 by the conveying rollers 121-124. The remaining first sheet W <b> 1 is conveyed to the bonding unit 130.

  The joining unit 130 includes a pair of transfer rollers 131 and 132. The pair of transfer rollers 131 and 132 joins the first sheet W1 conveyed from the first peeling unit 110 and the second multilayer sheet WU2 fed out from the second unwinding unit RO2 by thermocompression bonding. To do. Specifically, the pair of transfer rollers 131 and 132 applies pressure while heating the sheet in a state where the first sheet W1 and the second multilayer sheet WU2 are overlapped from both sides, thereby causing the first sheet W1 to be pressed. The second catalyst electrode layer M3 of the second multilayer sheet WU2 is transferred onto the electrolyte membrane M1. The second sheet W2 formed by joining the first sheet W1 and the second multilayer sheet WU2 is conveyed to the second peeling unit 140. The width D2 of the second sheet W2 is smaller than the width D1 of the first multilayer sheet WU1 (D2 <D1). This is because the electrolyte membrane M <b> 1 contracts due to heating by the joint 130.

  The second peeling unit 140 includes a peeling roller 141 and a conveying roller 142. The peeling roller 141 is disposed at a position close to the conveying roller 142 via the second sheet W2, and peels the second auxiliary sheet S2 from the second sheet W2. Thus, the third sheet W3 which is a sheet of the membrane electrode assembly in which the first catalyst electrode layer M2 is formed on one surface of the electrolyte membrane M1 and the second catalyst electrode layer M3 is formed on the other surface. Is formed. The peeled second auxiliary sheet S2 is wound up by the second winding portion RI2. The third sheet W3 is conveyed to the arrangement unit 150.

  The arrangement unit 150 is a mechanism unit for arranging the first auxiliary sheet S1 conveyed from the first peeling unit 110 on the third sheet W3 conveyed from the second peeling unit 140, and includes a conveyance roller. 151. The conveyance roller 151 contacts the surface of the third sheet W3 on which the second catalyst electrode layer M3 is formed, and changes the conveyance direction of the third sheet W3. When the conveyance direction is changed by the conveyance roller 151, the third sheet W3 is formed on the first catalyst electrode layer M2 formed outside the conveyance roller 151 from the first peeling unit 110. The conveyed first auxiliary sheet S1 is arranged. The first auxiliary sheet S1 has a surface opposite to the surface on which the first sheet W1 is formed in the first multilayer sheet WU1 so as to face the first catalyst electrode layer M2 of the third sheet W3. Placed in. The fourth sheet W4, which is a sheet in which the first auxiliary sheet S1 is disposed on the third sheet W3, is wound up in a roll shape at the first winding portion RI1.

  FIG. 2 is an explanatory diagram for explaining a state of the fourth sheet wound up by the first winding unit. The figure surrounded by the broken line shown in the upper side of FIG. 2 is a cross section of the X portion of the fourth sheet W4 as seen from the conveyance direction. The 4th sheet | seat W4 of 1st winding part RI1 is wound up so that it may overlap with the outer peripheral part of shaft member CA in order by rotation of shaft member CA. In the portion where the fourth sheet W4 overlaps (the broken line portion in FIG. 2), the second catalyst electrode layer M3 (anode) formed on the outer fourth sheet W4 with respect to the shaft member CA has the inner first electrode. It faces the first auxiliary sheet S1 formed on the fourth sheet W4. Therefore, the second catalyst electrode layer M3 (anode) formed on the outer fourth sheet W4 is in contact with the first catalyst electrode layer M2 (cathode) formed on the inner fourth sheet W4. Can be suppressed. That is, in the first winding unit RI1, since the first auxiliary sheet S1 is co-wound as a spacer sheet on the third sheet W3, the third sheet on the outer side by the first auxiliary sheet S1. Contact between the second catalyst electrode layer M3 (anode) formed on W3 and the first catalyst electrode layer M2 (cathode) formed on the inner third sheet W3 can be restricted. The membrane electrode assembly manufacturing apparatus 100 reuses the first auxiliary sheet S1 peeled off by the first peeling portion 110 as the spacer sheet. Further, since the width D1 of the first auxiliary sheet S1 is larger than the width D2 of the third sheet W3, even if the first auxiliary sheet S1 and the third sheet W3 slightly deviate, The contact between the second catalyst electrode layer M3 (anode) formed on the third sheet W3 and the first catalyst electrode layer M2 (cathode) formed on the inner third sheet W3 Can do.

  According to the membrane electrode assembly manufacturing apparatus 100 of the first embodiment described above, the first auxiliary sheet S1 is interposed as a spacer sheet when the third sheet W3 that is a membrane electrode assembly sheet is wound up. Therefore, the second catalyst electrode layer M3 (anode) formed on the outer third sheet W3 is in contact with the first catalyst electrode layer M2 (cathode) formed on the inner third sheet W3. Can be suppressed. Therefore, it is possible to suppress the occurrence of product defects caused by the second catalyst electrode layer M3 (anode) and the first catalyst electrode layer M2 (cathode) coming into contact with each other and sticking to each other. Moreover, since the 1st auxiliary sheet S1 peeled in the 1st peeling part 110 is reused as a spacer sheet, the manufacturing cost of a membrane electrode assembly can be suppressed.

  FIG. 3 is an explanatory diagram for explaining a schematic configuration of a membrane electrode assembly manufacturing apparatus of a comparative example. Compared with the membrane electrode assembly manufacturing apparatus 100 of the first example, the membrane electrode assembly manufacturing apparatus 105 of the comparative example conveys the first auxiliary sheet S1 separated by the first peeling unit 110 to the arrangement unit 150. However, it is provided with a third winding portion RI3 and a third unwinding portion RO3.

  The third winding unit RI3 winds up the first auxiliary sheet S1 peeled off by the first peeling unit 110. On the other hand, the third unwinding section RO3 feeds the slip sheet S3 to the arrangement section 150. The placement unit 150 places the slip sheet S3 unwound from the third unwinding portion RO3 on the third sheet W3 conveyed from the second peeling portion 140 by the same method as in the first embodiment. To do. The fifth sheet W5 in which the slip sheet S3 is disposed on the third sheet W3 is wound up in a roll shape at the first winding unit RI1.

  When a membrane electrode assembly is manufactured by the membrane electrode assembly manufacturing apparatus 105 of this comparative example, it is necessary to prepare a slip sheet S3 as an auxiliary material separately from the raw material of the membrane electrode assembly. On the other hand, when the membrane electrode assembly is manufactured by the membrane electrode assembly manufacturing apparatus 100 of the first embodiment of the present embodiment, the interleaf sheet S3 as the auxiliary material is not required. Reduction can be achieved.

  FIG. 4 is an explanatory diagram for explaining the properties of the first auxiliary sheet and the electrolyte membrane. Generally, the first auxiliary sheet S1 is used not only for the purpose of maintaining the strength of the electrolyte membrane M1, but also for the purpose of suppressing the shrinkage of the electrolyte membrane M1 due to heating. Specifically, the electrolyte membrane M1 contracts by heating, but the first auxiliary sheet S1 hardly contracts by heating. Therefore, the shrinkage of the electrolyte membrane M1 can be suppressed by forming the electrolyte membrane M1 on the first auxiliary sheet S1. The electrolyte membrane M1 has similar properties even when the first catalyst electrode layer M2 is formed. The membrane electrode assembly manufacturing apparatus 100 of the present embodiment separates the first sheet W1 including the electrolyte membrane M1 from the first auxiliary sheet S1 at the first peeling section 110 upstream of the bonding section 130, and bonds the first sheet W1. After shrinking the width of the electrolyte membrane M1 in the part 130, the first auxiliary sheet S1 is placed in the placement part 150. Therefore, in the first winding unit RI1, the width D1 of the first auxiliary sheet S1 can be made larger than the width D2 of the third sheet W3. Accordingly, even if the first auxiliary sheet S1 and the third sheet W3 are slightly deviated from each other, the second catalyst electrode layer M3 (anode) formed on the outer third sheet W3 and the inner side The contact with the first catalyst electrode layer M2 (cathode) formed on the third sheet W3 can be restricted.

B. Second embodiment:
FIG. 5 is an explanatory diagram for explaining a schematic configuration of the membrane electrode assembly manufacturing apparatus of the second embodiment. Compared with the membrane / electrode assembly manufacturing apparatus 100 of the first example, the membrane / electrode assembly manufacturing apparatus 108 of the second example uses the first auxiliary sheet S1 peeled by the first peeling part 110 as the placement part 150 It does not include the conveying rollers 121 to 124 (FIG. 1) for conveying and the second winding portion RI2 for winding the second auxiliary sheet S2 peeled off by the second peeling portion 140, instead of In addition, a third winding unit RI3 and conveying rollers 161 to 166 are provided.

  The third winding unit RI3 winds up the first auxiliary sheet S1 peeled off by the first peeling unit 110. The conveyance rollers 161 to 166 convey the second auxiliary sheet S <b> 2 peeled off at the second peeling unit 140 to the placement unit 150. The arrangement unit 150 arranges the second auxiliary sheet S2 peeled off at the second peeling unit 140 on the third sheet W3 conveyed from the second peeling unit 140 by the same method as in the first embodiment. To do. In the second auxiliary sheet S2, the surface opposite to the surface on which the second catalyst electrode layer M3 (anode) is formed in the second multilayer sheet WU2 is the first catalyst electrode of the third sheet W3. It arrange | positions so that the layer M2 (cathode) may be opposed. Thereby, it is possible to suppress the occurrence of product defects due to the second auxiliary sheet S2 sticking to the catalyst electrode layer M2 (cathode) of the third sheet W3. The sixth sheet W6 on which the second auxiliary sheet S2 is arranged on the third sheet W3 is wound up in a roll shape at the first winding portion RI1.

  As can be understood from the membrane electrode assembly manufacturing apparatus according to the first embodiment and the second embodiment described above, the auxiliary sheet that can be reused as the spacer sheet is not limited to the first auxiliary sheet S1, but the second sheet. Even the auxiliary sheet S2 can be reused as a spacer sheet. In addition, as a sheet | seat recycled as a spacer sheet | seat, the 1st auxiliary sheet S1 (1st Example) is more preferable than the 2nd auxiliary sheet S2. Since the width D1 of the first auxiliary sheet S1 is larger than the width D2 of the second auxiliary sheet S2 (D1> D2), the outer third sheet W3 when wound together with the third sheet W3. This is because the second catalyst electrode layer M3 (anode) formed on the inner surface can be further restricted from contacting the first catalyst electrode layer M2 (cathode) formed on the inner third sheet W3. is there.

C. Variations:
The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.

C-1. Modification 1:
In the present embodiment, the first catalyst electrode layer M2 is used as the cathode of the fuel cell, and the second catalyst electrode layer M3 is used as the anode of the fuel cell. However, the first catalyst electrode layer M2 is used as the anode of the fuel cell. The layer M2 may be used as the anode of the fuel cell, and the second catalytic electrode layer M3 may be used as the cathode of the fuel cell.

C-2. Modification 2:
The manufacturing process of the membrane electrode assembly shown in this example is an exemplification, and a process other than the process described above may be included, or a part of the process described above may not be included. For example, the second auxiliary sheet S2 is peeled once from the second sheet W2 on the upstream side of the second peeling portion 140 in the manufacturing process of the membrane electrode assembly, and the second auxiliary sheet is again formed. A step of attaching S2 to the same surface may be included.

C-3. Modification 3:
In this embodiment, the method for producing a membrane electrode assembly in which the catalyst electrode layers are formed on both sides of the electrolyte membrane has been described. However, other examples such as an electrolyte membrane with a catalyst electrode layer in which the catalyst electrode layer is formed on only one of the electrolyte membranes are available. You may apply to the manufacturing method of this membrane member. For example, if a multilayer sheet of the electrolyte membrane M1 in which the catalyst electrode layer M2 is not formed and the first auxiliary sheet S1 is used instead of the first multilayer sheet WU1, an electrolyte membrane with a catalyst electrode layer is manufactured. be able to.

C-4. Modification 4:
The configuration of the peeling portions 110 and 140, the bonding portion 130, and the placement portion 150 shown in the present embodiment is not limited to the configuration described in the embodiment as long as the functions described in the embodiment can be realized. For example, the peeling rollers 112 and 142 in the peeling units 110 and 140 and the transport roller 151 in the arrangement unit 150 may be appropriately configured as a roller pair.

C-5. Modification 5:
In the present embodiment, the arrangement unit 150 has been described as arranging the first auxiliary sheet S1 on the third sheet W3. However, when the arrangement unit 150 arranges the arrangement, the arrangement unit 150 is applied with some pressing force in the stacking direction. The configuration may be such that the third sheet W3 and the first auxiliary sheet S1 are bonded together.

DESCRIPTION OF SYMBOLS 100, 105, 108 ... Membrane electrode assembly manufacturing apparatus 110 ... 1st peeling part 111 ... Conveyance roller 112 ... Separation roller 121-124 ... Conveyance roller 130 ... Joining part 131 ... Transfer roller 140 ... 2nd peeling part 141 ... Peel roller 142 ... Conveying roller 150 ... Arrangement unit 151 ... Conveying roller 161-166 ... Conveying roller RI1 ... First winding unit RI2 ... Second winding unit RI3 ... Third winding unit RO1 ... First winding Unloading portion RO2 ... second unwinding portion RO3 ... third unwinding portion WU1 ... first multilayer sheet WU2 ... second multilayer sheet S1 ... first auxiliary sheet S2 ... second auxiliary sheet S3 ... Interleaf sheet W1 ... 1st sheet W2 ... 2nd sheet W3 ... 3rd sheet W4 ... 4th sheet W5 ... 5th sheet W6 ... 6th sheet M1 ... Electrolyte membrane M2 ... 1st catalyst electrode layer M3 ... 2nd catalyst electrode layer

Claims (7)

A method for producing a membrane electrode assembly used in a fuel cell,
Peeling the backsheet from a multilayer sheet in which an electrolyte membrane or a catalyst electrode layer is formed on the backsheet;
A step of disposing the back sheet after peeling on one surface of a strip-shaped membrane electrode assembly sheet, and winding the membrane electrode assembly sheet into a roll together with the back sheet. The manufacturing method according to claim 1,
A first step of forming the first sheet by peeling the first auxiliary sheet from a multilayer sheet having an electrolyte membrane formed on the first auxiliary sheet;
A second step of forming the second sheet by joining the multilayer sheet in which the catalyst electrode layer is formed on the second auxiliary sheet and the first sheet;
A third step of forming a third sheet as the membrane electrode assembly sheet by peeling the second auxiliary sheet from the second sheet;
The first auxiliary sheet or the second auxiliary sheet after peeling is used as the back sheet, and is arranged on one surface of the third sheet, and the third sheet is rolled together with the back sheet. A fourth step of winding. In the manufacturing method of Claim 2,
In the fourth step, the surface of the second auxiliary sheet opposite to the surface on which the catalyst electrode layer is formed is opposite to the surface of the third sheet on which the catalyst electrode layer is formed. The manufacturing method includes a step of disposing the second auxiliary sheet on one surface of the third sheet so as to face the side surface. An apparatus for manufacturing a membrane electrode assembly used in a fuel cell,
A peeling portion for peeling the back sheet from a multilayer sheet in which an electrolyte membrane or a catalyst electrode layer is formed on the back sheet;
A manufacturing apparatus comprising: a winding unit that winds the membrane electrode assembly sheet in a roll shape together with the back sheet in a state where the back sheet after peeling is disposed on one surface of the strip-shaped membrane electrode assembly sheet . The manufacturing apparatus according to claim 4 further includes:
The manufacturing apparatus provided with the conveyance roller for conveying the said back sheet peeled in the said peeling part to the said winding-up part. An apparatus for manufacturing a membrane electrode assembly used in a fuel cell,
A first peeling portion for forming a first sheet by peeling the first auxiliary sheet from a first multilayer sheet having an electrolyte membrane formed on the first auxiliary sheet;
A second multilayer sheet in which a catalyst electrode layer is formed on a second auxiliary sheet, and a joining portion that forms a second sheet by joining the first sheet;
A second peeling portion that forms a third sheet by peeling the second auxiliary sheet from the second sheet;
The third auxiliary sheet and the second auxiliary sheet together with the first auxiliary sheet or the second auxiliary sheet in a state where the first auxiliary sheet or the second auxiliary sheet after peeling is disposed on one surface of the third sheet. And a winding unit for winding the sheet into a roll. The manufacturing apparatus according to claim 6 further includes:
The first conveying roller for conveying the first auxiliary sheet after being peeled off at the first peeling portion to the winding portion, or the second peeling off at the second peeling portion. The manufacturing apparatus provided with the 2nd conveyance roller for conveying an auxiliary | assistant sheet | seat to the said winding-up part.

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