JP2013114887A - Method for producing electrolyte membrane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing an electrolyte membrane including a reinforcement member while suppressing the occurence of neck-in.SOLUTION: The method for producing the electrolyte membrane comprises the steps of: removing a bonded part in which an auxiliary sheet and a member for the electrolyte membrane are bonded, from a member for the electrolyte membrane having the auxiliary sheet provided therewith, which is obtained by bonding the member for the electrolyte membrane on the auxiliary sheet; and then separating the auxiliary sheet from the member for the electrolyte membrane of a non-bonded part in which the auxiliary sheet and the member for the electrolyte membrane are not bonded.

Description

  The present invention relates to a method for producing an electrolyte membrane used in a fuel cell.

  In a polymer electrolyte fuel cell (hereinafter simply referred to as “fuel cell”), catalyst electrodes (anode and cathode) carrying a catalyst for promoting a fuel cell reaction are formed on both surfaces of an electrolyte membrane. Membrane electrode assemblies are used. As the electrolyte membrane, a thin film of a solid polymer showing good proton conductivity in a wet state is used. Here, it is desirable that the electrolyte membrane used in the fuel cell be thinned in order to improve proton conductivity, but there is a problem that mechanical durability is weakened with the thinning. In addition, since the electrolyte membrane swells / shrinks in accordance with the wet state inside the fuel cell, there is a problem that mechanical durability against repeated swelling and shrinkage and durability of power generation performance are weak. In the following, mechanical durability and durability of power generation performance are referred to as “durability” without particular distinction. In order to solve this problem of durability, a porous reinforcing member having pores inside is included to reduce the thickness and improve the durability of the multilayered electrolyte membrane (hereinafter referred to as “reinforcing electrolyte membrane”). Is also used.

  The reinforced electrolyte membrane as described above is manufactured, for example, as follows. That is, a porous resin film as a reinforcing member (hereinafter also referred to as “porous reinforcing film” or “reinforcing film”) is superimposed on both surfaces or one surface of the electrolyte film, and heated and heated by two hot rolls. By pressing, an electrolyte membrane (reinforcing electrolyte membrane) including a reinforcing member is manufactured.

  Here, the electrolyte membrane and the reinforcing membrane as members used for manufacturing the reinforced electrolyte membrane as described above cause neck-in, wrinkles, distortion, etc. due to various external forces applied during the conveyance process during the manufacturing process. There is a problem that it is easy to do. For this reason, conventionally, these films are handled in a state where they are adhered onto a carrier sheet, and are used after being peeled off from the carrier sheet at the time of production (for example, Patent Documents 1 and 2). , 3 etc.). However, even when the carrier sheet is peeled off, there is a problem in that neck-in occurs due to the application of a peeling force to the peeled film, resulting in a decrease in durability.

JP 2010-027461 A JP 2011-077700 A JP 2011-065877 A JP 2011-054352 A

  Then, an object of this invention is to provide the technique which can manufacture the electrolyte membrane (reinforced electrolyte membrane) in which the reinforcement member was included, suppressing generation | occurrence | production of neck-in.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

[Application Example 1]
A method of manufacturing an electrolyte membrane, wherein an adhesive portion where the auxiliary sheet and the electrolyte membrane member are bonded is cut out from the electrolyte membrane member with an auxiliary sheet in which the electrolyte membrane member is bonded to the auxiliary sheet. By this, the manufacturing method of an electrolyte membrane including the process of isolate | separating the said auxiliary | assistant sheet | seat and said electrolyte membrane member of the non-adhesion part to which the said auxiliary sheet | seat and the said electrolyte membrane member are not adhere | attached.
According to this manufacturing method, the auxiliary sheet and the electrolyte membrane member are simply separated at the non-bonded portion where the auxiliary sheet and the electrolyte membrane member are not bonded, and the separated electrolyte membrane member is used. Therefore, it is possible to manufacture the electrolyte membrane while suppressing the occurrence of neck-in.

[Application Example 2]
It is a manufacturing method of the electrolyte membrane of the application example 1, Comprising: The said adhesion part is a manufacturing method of the electrolyte membrane which is the edge part of the width direction of the said member for electrolyte membranes with an auxiliary sheet.
If it does in this way, excision of an adhesion part will become easy.

[Application Example 3]
The method for manufacturing an electrolyte membrane according to Application Example 1 or Application Example 2, wherein the adhesive portion is obtained by thermally melting a region corresponding to the adhesive portion of the auxiliary sheet, and the auxiliary sheet, the electrolyte membrane member, The manufacturing method of the electrolyte membrane currently formed by adhere | attaching.
In this way, a heat-resistant sheet can be used as an auxiliary sheet.

[Application Example 4]
It is the manufacturing method of the electrolyte membrane as described in any one of the application examples 1 thru | or the application example 3, Comprising: Furthermore, it bonded on the said auxiliary sheet in the area | region corresponding to the said 1st electrolyte membrane member and the said adhesion part. The manufacturing method of an electrolyte membrane including the process of joining the 2nd member for electrolyte membranes, and producing the said member for electrolyte membranes with an auxiliary | assistant sheet | seat.
In this way, an electrolyte membrane having a multilayer structure can be easily manufactured.

[Application Example 5]
It is a manufacturing method of the electrolyte membrane of application example 4, Comprising: The manufacturing method of an electrolyte membrane further including the process of bonding the said 2nd member for electrolyte membranes to the said auxiliary sheet in the area | region corresponding to the said adhesion part.
According to this, the 2nd member for electrolyte membranes stuck on the auxiliary sheet in the field corresponding to an adhesion part can be produced.

[Application Example 6]
The method for producing an electrolyte membrane according to Application Example 4 or Application Example 5, wherein the first electrolyte membrane member is an electrolyte polymer precursor formed of an electrolyte polymer precursor that is a pre-stage to which proton conductivity is imparted. A method for producing an electrolyte membrane, comprising a membrane, wherein the second member for an electroelectrolyte membrane is a porous reinforcing membrane having pores.
In this case, an electrolyte membrane having a multilayer structure including a porous reinforcing membrane can be easily produced.

  Note that the present invention can be realized not only in a method for manufacturing an electrolyte membrane but also in various forms such as an apparatus for manufacturing an electrolyte membrane.

It is a flowchart which shows the manufacturing process of the electrolyte membrane as 1st Example of this invention. It is a schematic diagram which shows the process part 1 which performs the process of step S10 in FIG. It is a schematic diagram which shows the process part 2 which performs the process of step S20 in FIG. It is a schematic diagram which shows the process part 3 which performs the process of step S30 in FIG. It is a flowchart which shows the manufacturing process of the electrolyte membrane as 2nd Example of this invention. It is a schematic diagram which shows process part 2Bb which performs step S20Bb in FIG. It is a schematic diagram which shows the process part 3B which performs step S30B in FIG. It is a schematic diagram which shows process part 2Bv as a modification of process part 2Ba and process part 2Bb. It is a flowchart which shows the manufacturing process of the electrolyte membrane as 3rd Example of this invention. It is a schematic diagram which shows process part 2Cb which performs step S20Cb in FIG. It is a schematic diagram which shows 3C of process parts which perform step S30C in FIG. It is a flowchart which shows the manufacturing process of the electrolyte membrane as 4th Example of this invention. It is a schematic diagram which shows process part 1D which performs step S100 in FIG. It is a schematic diagram which shows process part 2D which performs step S200 in FIG. It is a schematic diagram which shows process part 3D which performs step S300 in FIG. It is a flowchart which shows the manufacturing process of the electrolyte membrane as 5th Example of this invention. It is a schematic diagram which shows the process part 3E which performs step S300E in FIG.

A. First embodiment:
FIG. 1 is a flowchart showing a manufacturing process of an electrolyte membrane as a first embodiment of the present invention. 2, 3, and 4 are schematic diagrams illustrating process units 1, 2, and 3 that execute the processes of steps S <b> 10, S <b> 20, and S <b> 30 in FIG.

  First, in step S10, a porous reinforcing film is bonded to the auxiliary sheet by the process unit 1 shown in FIG. 2 to prepare a reinforcing film with an auxiliary sheet.

  The process section 1 includes an extending section 110, an auxiliary sheet bonding section 120, and a bonded end section cutting section 130. The stretched portion 110 has pores as the porous reinforcing membrane 12 by heating to a temperature higher than the crystal melting point in a state where the fluororesin material is stretched in a predetermined direction (one direction or multiple directions). A porous resin film is produced and sent to the bonding part 120. In addition, as a fluorine resin material, polytetrafluoroethylene (PTFE), polyethylene, polypropylene, or the like can be used.

  The auxiliary sheet bonding unit 120 includes a bonding roller pair 121 including bonding rollers 121a and 121b. The belt-like porous reinforcing film 12 fed from the stretching unit 110 to the auxiliary sheet laminating unit 120 is conveyed to the laminating roller pair 121 so as to be sandwiched by the nip 121n of the laminating roller pair 121. Further, the belt-like auxiliary sheet BS fed from the auxiliary sheet unwinding portion RO1 to the laminating portion 120 is conveyed so as to be sandwiched by the nip portion 121n along one laminating roller 121a of the laminating roller pair 121. The The auxiliary sheet unwinding portion RO1 is set with a roll of the auxiliary sheet BS wound in a roll shape, and the auxiliary sheet BS is unwound from the auxiliary sheet unwinding portion RO1 and thereby the auxiliary sheet bonding portion. 120.

  The porous reinforcing film 12 and the auxiliary sheet BS conveyed so as to be sandwiched by the nip part 121n are superposed so as to be in contact with each other at the nip part 121n, and are bonded together by being pressed by the bonding rollers 121a and 121b. Thereby, the reinforcing film with an auxiliary sheet 12BSr is produced. And the produced reinforcing film 12BSr with an auxiliary sheet is sent out to the bonded end portion excision 130. Here, adhesive regions BSa are provided at both ends in the width direction perpendicular to the conveyance direction of the auxiliary sheet BS, and the porous reinforcing film 12 is adhered to the entire surface overlaid on the auxiliary sheet BS. Instead, it is bonded to the auxiliary sheet BS only through the adhesive region BSa. As the auxiliary sheet BS, a polyester film such as polyethylene terephthalate (PET), an olefin film, a polyimide film, or the like is used. The adhesive region BSa is formed of, for example, an adhesive made of silicon resin.

  The bonded end portion excision part 130 includes a slit forming part 131 and a slit end separating part 132. The slit forming part 131 is composed of two round blade rollers 131a and 131b. The slit end separation portion 132 includes two separation rollers 132a and 132b. The auxiliary sheet-attached reinforcing film 12BSr fed from the auxiliary sheet bonding unit 120 is conveyed so as to be sandwiched between the nip portions 131n of the two round blade rollers 131a and 131b of the bonded end portion cutting unit 130. The auxiliary sheet-attached reinforcing film 12BSr sandwiched by the nip portion 131n is slit along the transport direction so as to cut out the outer end portion of the bonded portion bonded in the adhesive region BSa. The reinforcing sheet 12BSr with the auxiliary sheet into which the slit is inserted is conveyed so as to be sandwiched by the nip part 132n of the slit end separation part 132. Then, the end 12BSg outside the inserted slit is conveyed along one separation roller 132a of the slit end separation portion 132, and taken up by the slit end winding portion RI1g. Further, the reinforcing sheet with auxiliary sheet 12BS on the center side with respect to the inserted slit is conveyed via the other separation roller 132b of the slit end separating part 132 and taken up by the reinforcing film with auxiliary sheet winding part RI1.

  As described above, in the process unit 1, the auxiliary sheet-attached reinforcing film 12BS in which the end of the porous reinforcing film 12 is bonded via the adhesive region BSa of the auxiliary sheet BS is prepared.

Next, in step S20 of FIG. 1, a precursor of an electrolyte polymer before proton conductivity is imparted by a hydrolysis process described later by the process unit 2 shown in FIG. 3 (hereinafter also referred to as “electrolyte precursor”). The thin film (hereinafter also referred to as “electrolyte precursor film”) is formed, and the reinforcing film with auxiliary sheet produced in the process part 1 of step S10 is bonded to one surface of the electrolyte precursor film. As the electrolyte polymer (hereinafter also referred to as “electrolyte”), a perfluorosulfonic acid polymer having a —SO ₃ H group at the end of the regular chain, such as Nafion (registered trademark), can be used. The electrolyte precursor has a —SO ₂ F group at the chain end.

  The process unit 2 includes an electrolyte precursor film deposition unit 210, an electrolyte precursor film bonding unit 220, and a bonded end portion cutting unit 230. The electrolyte precursor film deposition unit 210 includes a paste extruder 211, a transport roller 212, and a dryer 213. The electrolyte precursor film forming unit 210 extrudes the paste-like electrolyte precursor 11fm from the paste extruder 211 and forms it into a thin film, while drying it with the dryer 213 to form the electrolyte precursor film 11f. Is sent to the electrolyte precursor film bonding portion 220.

  The electrolyte precursor film bonding unit 220 includes a bonding roller pair 221 including bonding rollers 221a and 221b, and a heater 222. The electrolyte precursor film 11f sent from the electrolyte precursor film forming unit 210 is conveyed to the bonding roller pair 221 so as to be sandwiched by the nip portion 221n of the bonding roller pair 221. Further, the reinforcing film 12BS with the auxiliary sheet fed from the reinforcing film unwinding portion RO2 is sandwiched between the bonding roller pair 221 and the nip portion 221n along one bonding roller 221b of the bonding roller pair 221. So that it is conveyed. In addition, the roll of the reinforcing film 12BS with the auxiliary sheet wound in a roll shape is set in the reinforcing film unwinding part RO2, and the reinforcing film 12BS with the auxiliary sheet is unwound from the reinforcing film unwinding part RO2. Is fed into the electrolyte precursor film bonding portion 220.

  The reinforcing film 12BS with the auxiliary sheet is heated at a predetermined temperature (for example, 90 ° C.) by the heater 222 in the process of being conveyed to the nip portion 221n along the bonding roller 221b, and then the porous reinforcing film 12 and the electrolyte. The precursor films 11f are overlapped so as to be in contact with each other and are pressed by the bonding rollers 221a and 221b. Thereby, the porous reinforcing film 12 and the electrolyte precursor film 11f are bonded to each other, and the reinforced electrolyte precursor film 13f in which the porous reinforcing film 12 and the electrolyte precursor film 11f are bonded is bonded to the auxiliary sheet BS. Then, the reinforcing electrolyte precursor film 13fBSr with auxiliary sheet is produced. The produced auxiliary electrolyte precursor film 13fBSr with an auxiliary sheet is sent out to the bonded end cutting section 230. As the heater 222, an IR heater, a blower with a temperature adjustment function, or the like can be used.

  The bonded end portion excision section 230 includes a slit forming section 231 configured with a flat blade and a slit end spacing section 232 configured with a separation roller. The auxiliary sheet-attached reinforcing electrolyte precursor film 13fBSr fed from the electrolyte precursor film bonding section 220 is outside the bonded portion where the auxiliary sheet BS and the reinforcing electrolyte precursor film 13f are bonded by the flat blade of the slit forming section 231. A slit is formed along the conveying direction so as to cut off the end of the sheet. Of the reinforced electrolyte precursor film 13fBSr with auxiliary sheet, the end portion 13fBSg outside the inserted slit is conveyed along the separation roller of the slit end separation portion 232, and taken up by the slit end winding portion RI2g. It is done. Further, the reinforcing electrolyte precursor film with auxiliary sheet 13fBS on the center side with respect to the inserted slit is wound up by the reinforcing electrolyte precursor film winding portion with auxiliary sheet winding portion RI2 via the separation roller of the slit end separation portion 232. The slit forming part 231 and the slit end separating part 232 may have the same configuration as the slit forming part 131 and the slit end separating part 132 in the process part 1 (FIG. 2).

  As described above, in the process unit 2, the reinforced electrolyte precursor film 13f in which the porous reinforcing film 12 is bonded to one surface of the electrolyte precursor film 11f is produced, and the reinforced electrolyte precursor film 13f is attached to the auxiliary sheet BS. Affixed to the auxiliary sheet BS in the region BSa, a reinforced electrolyte precursor film 13fBSr with an auxiliary sheet is produced.

  Next, in step S30 in FIG. 1, the auxiliary sheet is peeled off from the reinforcing electrolyte precursor film with auxiliary sheet and the heat-resistant protective sheet is overlaid in the porous reinforcing film by step 3 shown in FIG. A composite film (thin film) having a multilayer structure in which the electrolyte precursor film and the porous reinforcing film are integrated is prepared by melting and impregnating the electrolyte precursor constituting the electrolyte precursor film. The process unit 3 includes an auxiliary sheet peeling unit 310 and a melt impregnation unit 320.

  The auxiliary sheet peeling part 310 includes a slit forming part 311 constituted by a flat blade, a slit end separation part 312 constituted by a separation roller, and an auxiliary sheet peeling part 313 constituted by a peeling roller. A non-bonded portion of the auxiliary sheet BS and the reinforced electrolyte precursor film 13f is formed on the reinforced electrolyte precursor film 13fBS with the auxiliary sheet fed from the reinforced electrolyte film unwinding section RO3 with the auxiliary sheet to the auxiliary sheet peeling section 310 by the slit forming section 311. A slit is formed so as to separate 13fBSm and adhesive portion 13fBSg. In addition, the roll of the reinforcing electrolyte precursor film 13fBS with auxiliary sheet wound in a roll shape is set in the reinforcing electrolyte precursor film unwinding portion RO3 with auxiliary sheet, and the reinforcing electrolyte precursor film 13fBS with auxiliary sheet is an auxiliary sheet. By being unwound from the attached reinforcing electrolyte precursor film unwinding portion RO3, the auxiliary sheet peeling portion 310 is sent.

  The adhesion portion 13fBSg and the non-adhesion portion 13fBSm of the reinforced electrolyte precursor film 13fBS with the auxiliary sheet into which the slit is inserted are separated via the slit end separation portion 312, and the adhesion portion 13fBSg is wound around the adhesion portion winding portion RI3g. The non-bonded portion 13fBSm is conveyed to the auxiliary sheet peeling unit 313. The slit forming part 311 and the slit end separating part 312 may have the same configuration as the slit forming part 131 and the slit end separating part 132 in the process part 1 (FIG. 2).

  The auxiliary sheet peeling portion 313 is composed of a pair of peeling rollers by the peeling rollers 313a and 313b, and the non-adhesive portion 13fBsm (hereinafter simply referred to as “reinforcing electrolyte precursor film with auxiliary sheet”) of the fed reinforcing electrolyte precursor film with auxiliary sheet 13fBS. 13fBSm ”) is conveyed along the peeling roller 313a so as to be sandwiched by the nip portion 313n of the pair of peeling rollers. Of the reinforced electrolyte precursor film 13fBSm with an auxiliary sheet sandwiched between the nip portions 313n, the auxiliary sheet BS is peeled from the reinforced electrolyte precursor film 13f by being conveyed along the peeling roller 313a, and peeled off via the guide roller RG. The auxiliary sheet take-up unit RBSc is conveyed and taken up. On the other hand, the reinforcing electrolyte precursor film 13f from which the auxiliary sheet BS has been peeled is sent to the melt impregnation portion 320.

  The melt impregnation unit 320 includes a protective sheet overlay unit 321 and a melt impregnation execution unit 322. The melt impregnation execution unit 322 is composed of a melt impregnation roller pair composed of two melt impregnation rollers 322a and 322b. The protective sheet stacking unit 321 includes two peeling rollers 313 a and 313 b that constitute the auxiliary sheet peeling unit 313 and a melt impregnation roller 322 a that constitutes the melt impregnation execution unit 322. In the following description, these rollers 313a, 313b, and 322a are also referred to as “superposition rollers”.

  In the nip portion 313n of the overlapping roller pair formed by the two overlapping rollers 313a and 313b of the protective sheet overlapping portion 321, the protective sheet CS is on the side opposite to the surface from which the auxiliary sheet BS of the reinforcing electrolyte precursor film 13f is peeled off. It is conveyed from the first protective sheet unwinding part RCS1 via the guide roller RG so as to be superimposed on the surface of the sheet. Thereby, the protective sheet CS is superimposed on one surface of the reinforced electrolyte precursor film 13f. The reinforced electrolyte precursor film 13f with the protective sheet CS superimposed on one surface is provided along the superimposing roller 313b with the nip portion 321n of the superimposing roller pair formed by the two superimposing rollers 313b and 322a of the protective sheet superimposing portion 321. It is conveyed so as to be sandwiched between. In addition, the second protective sheet unwinding portion RCS2 is inserted into the nip portion 321n from the second protective sheet unwinding portion RCS2 via the guide roller RG so as to be overlapped and sandwiched by the other surface of the reinforcing electrolyte precursor film 13f on which the protective sheet CS is not overlapped. The protective sheet CS is conveyed. Thereby, the protective sheet CS is also superimposed on the other surface of the reinforced electrolyte precursor film 13f. In addition, the roll of the protection sheet CS wound in roll shape is set in the 1st and 2nd protection sheet unwinding parts RCS1 and RCS2, and the protection sheet CS is the 1st and 2nd protection sheet winding. By being unwound from the feeding parts RCS1 and RCS2, the sheet is fed into the protective sheet stack 321.

  The reinforced electrolyte precursor film 13fCS, in which the protective sheet CS is superimposed on both surfaces of the reinforced electrolyte precursor film 13f, has two melt impregnations along the melt impregnation roller 322a that has functioned as the superposition roller of the protective sheet superposition portion 321. It is conveyed so as to be sandwiched between the nip portions 322n of the pair of melt impregnation rollers by the rollers 322a and 322b, and further conveyed along the melt impregnation roller 322b. The melt impregnation rollers 322a and 322b are heated at a temperature at which the electrolyte precursor 11fm constituting the electrolyte precursor film 11f is melted, for example, a temperature of about 170 to 230 ° C. And it is pressurized by being pinched in nip part 322n. As a result, the electrolyte precursor 11fm constituting the electrolyte precursor film 11f is melted and impregnated in the porous reinforcing film 12, and the reinforced electrolyte precursor film having a multilayer structure in which the porous reinforcing film 12 and the electrolyte precursor film 11f are integrated. 10f is formed, and the reinforced electrolyte precursor film 10fCS with a protective sheet to which the protective sheet CS is bonded is produced. The produced reinforced electrolyte precursor film 10fCS with protective sheet is conveyed to the reinforced electrolyte precursor film winding unit RI3 via the guide roller RG and wound. A steel roller is used for the first melt impregnation roller 322a, and a silicon roller is used for the second melt impregnation roller 322b. This can enhance the adhesion at the nip portion 322n by using one of the rollers made of silicon having higher elasticity than that of steel. However, since the heat resistance of silicon is lower than that of steel, for example, the heating temperature of steel can be set to about 220 ° C., whereas the heating temperature of silicon is set to about 180 ° C. In addition, as the protective sheet CS, a film sheet made of a resin material such as tetrafluoroethylene / hexafluoropropylene copolymer (FEP) has heat resistance against the heating temperature by the melt impregnation rollers 322a and 322b. The high heat-resistant sheet | seat which has is used.

  As described above, in the process unit 3, the reinforced electrolyte precursor film 10f having a multilayer structure in which the porous reinforcing film 12 is melt-impregnated with the electrolyte conductor 11fm of the electrolyte precursor film 11f is manufactured.

Finally, in step 40 of FIG. 1, the reinforcing electrolyte precursor membrane 10f is hydrolyzed so that the electrolyte precursor is an electrolyte having proton conductivity, thereby forming a multilayer structure including a porous reinforcing material. An electrolyte membrane is prepared. Specifically, for example, the reinforced electrolyte precursor film 10f from which the protective sheet CS has been peeled is immersed in an alkaline solution, and the —SO ₂ F group of the electrolyte precursor is converted to —SO ₃ Na group. Then, after the modified reinforced electrolyte precursor film 10f is washed, it is immersed in an acidic solution, and the —SO ₃ Na group modified in the previous step is further transformed into an —SO ₃ H group, and proton conductivity is obtained. It is set as the electrolyte which has.

  As described above, in the manufacturing process of the present embodiment, when the auxiliary sheet BS is peeled from the reinforcing electrolyte precursor film 13fBS with auxiliary sheet, the bonded portion 13fBSg and the non-bonded portion 13fBSm of the auxiliary sheet BS and the reinforcing electrolyte precursor film 13f are separated. And are separated. Then, the auxiliary sheet BS of the separated non-adhesive portion 13fBsm is peeled off, and the reinforcing electrolyte precursor film 13f of the non-adhesive portion 13fBSm from which the auxiliary sheet BS is peeled off is used. In this case, since the auxiliary sheet BS of the non-adhesive portion 13fBSm and the reinforcing electrolyte precursor film 13f are not bonded via the adhesive region BSa, the auxiliary sheet BS can be easily peeled off, as described in the prior art. Generation | occurrence | production of the neck in by peeling of an auxiliary sheet can be suppressed. Thereby, an electrolyte membrane having a multilayer structure including a porous reinforcing material can be produced as an electrolyte membrane having excellent durability.

  2 to 4, components that are not particularly necessary for explanation, such as a transport tension adjusting mechanism (a transport tension generating mechanism, a transport tension monitoring mechanism, a transport tension separating mechanism, etc.), a guide roller, and the like. However, in actuality, these components are appropriately added. Moreover, the bonding end part cutting part 130 of the process part 1 and the bonding end part cutting part 230 of the process part 2 are not necessarily required, and can be omitted.

B. Second embodiment:
FIG. 5 is a flowchart showing the manufacturing process of the electrolyte membrane as the second embodiment of the present invention. In the electrolyte membrane manufacturing process of the second embodiment, step S20 (FIG. 1) of the first embodiment is replaced with steps S20Ba and S20Bb, and step S30 (FIG. 1) is replaced with step S30B accordingly. An example in which an electrolyte membrane is produced by bonding a porous reinforcing membrane to both sides of the membrane is shown.

  In step S20Ba, an electrolyte precursor film is formed by the process part 2Ba, and the reinforcing sheet with auxiliary sheet produced in the process part 1 of step S10 is bonded to one surface of the electrolyte precursor film. Since this process part 2Ba is the same as the process part 2 shown in FIG. 2, illustration and description are omitted. In step S20Bb, the reinforcing sheet with the auxiliary sheet is bonded to the other surface on which the porous reinforcing film of the electrolyte precursor film is not yet bonded by the process part 2Bb shown in FIG. FIG. 6 is a schematic diagram showing the process part 2Bb for executing step S20Bb in FIG.

  The process part 2Bb includes a reinforcing film bonding part 240 and a bonded end part cutting part 250. The reinforcing film laminating unit 240 includes a laminating roller pair 241 formed by laminating rollers 241a and 241b, and a heater 242. The reinforced electrolyte precursor film 13fBS with auxiliary sheet fed from the reinforced electrolyte precursor film unwinding portion RO2Bb2 with auxiliary sheet is conveyed so as to be sandwiched by the nip portion 241n along one bonding roller 241a of the bonding roller pair 241. Is done. In addition, the auxiliary sheet-attached reinforcing film 12BS fed from the reinforcing film unwinding portion RO2Bb1 is conveyed to the bonding roller pair 241 so as to be sandwiched between the nip portions 241n of the bonding roller pair 241. In addition, the roll of the reinforcing film 12BS with the auxiliary sheet wound in a roll shape is set in the reinforcing film unwinding part RO2Bb1, and the reinforcing film 12BS with the auxiliary sheet is unwound from the reinforcing film unwinding part RO2Bb1. Is sent to the reinforcing film bonding portion 240. In addition, the roll of reinforcing electrolyte precursor film 13fBS with auxiliary sheet wound in a roll shape is set in the reinforcing electrolyte precursor film unwinding portion RO2Bb2 with auxiliary sheet, and the reinforcing electrolyte precursor film 13fBS with auxiliary sheet is an auxiliary sheet. By being unwound from the attached reinforcing electrolyte precursor film unwinding portion RO2Bb2, it is fed into the reinforcing film bonding portion 240.

  The reinforcing electrolyte precursor film 13fBS with auxiliary sheet and the reinforcing film 12BS with auxiliary sheet are heated at a predetermined temperature (for example, 90 ° C.) by the heater 242 in the process of being transported to the nip portion 241n of the bonding roller pair 241, thereby assisting. The electrolyte precursor film 11f of the reinforced electrolyte precursor film with sheet 13fBS and the porous reinforcing film 12 of the reinforced film with auxiliary sheet 12BS are overlapped and pressed by the bonding rollers 241a and 241b. At this time, the reinforcing electrolyte precursor film 13f is bonded so that the surface of the electrolyte precursor film 11f on the side where the porous reinforcing film 12 is not bonded and the porous reinforcing film 12 of the auxiliary sheet with reinforcing sheet 12BS are bonded. Thus, a reinforced electrolyte precursor film 14f in which the porous reinforcing film 12 is bonded to both surfaces of the electrolyte precursor film 11f is manufactured, and the auxiliary sheet-attached reinforced electrolyte in which the auxiliary sheet BS is bonded to both surfaces of the reinforced electrolyte precursor film 14f. The precursor film 14fBSr is produced. The produced auxiliary electrolyte precursor film 14fBSr with an auxiliary sheet is sent out to the bonded end portion cutting portion 250. As the heater 242, an IR heater, a blower with a temperature adjusting function, or the like can be used.

  The bonded end portion cutting section 250 includes a slit forming section 251 and a slit end separating section 252. The slit forming portion 251 is configured by two round blade rollers 251a and 251b, similarly to the slit forming portion 131 of the bonded end portion cutting portion 130 (FIG. 1). The slit end separation portion 252 is also configured by two separation rollers 252a and 252b, similarly to the slit end separation portion 132 of the bonded end portion cutting portion 130. The auxiliary sheet BS and the reinforced electrolyte precursor film 14f are bonded to the reinforced electrolyte precursor film 14fBSr fed from the reinforced film bonding part 240 by the two round blade rollers 251a and 251b of the slit forming part 251. A slit is made along the transport direction so as to cut off the outer end of the bonded portion. Of the reinforced electrolyte precursor film 14fBSr with the auxiliary sheet into which the slit is inserted, the end part 14fBSg outside the inserted slit is conveyed along one separation roller 252a of the slit end separation part 252, and the slit end winding is performed. It is wound up by the take-up portion RI2Bg. Further, the reinforcing electrolyte precursor film 14fBS with an auxiliary sheet on the center side from the inserted slit is conveyed via the other separation roller 132b of the slit end separation section 132, and at the reinforcing electrolyte precursor film winding section RI2Bb with an auxiliary sheet. It is wound up.

  As described above, in the process parts 2Ba and 2Bb, the reinforced electrolyte precursor film 14f in which the porous reinforcing film 12 is bonded to both surfaces of the electrolyte precursor film 11f is produced, and both surfaces of the reinforced electrolyte precursor film 14f are provided on the auxiliary sheet. Affixed to the auxiliary sheet BS in the adhesive region BSa at the end of the BS, a reinforced electrolyte precursor film 14fBS with an auxiliary sheet is produced.

  In step S30B, the process sheet 3B shown in FIG. 7 separates the auxiliary sheet from the reinforced electrolyte precursor film with the auxiliary sheet, and after stacking the heat-resistant protective sheet, the electrolyte precursor film is formed in the porous reinforced film. An electrolyte precursor to be melted and impregnated to produce a composite film having a multilayer structure in which the electrolyte precursor film and the porous reinforcing film are integrated. FIG. 7 is a schematic diagram showing the process unit 3B that executes step S30B in FIG.

  The process part 3B corresponds to produce a composite film having a multilayer structure in which the electrolyte precursor film and the porous reinforcement film are integrated from the auxiliary sheet-added reinforcing electrolyte precursor film 14fBS produced in the process parts 2Ba and 2Bb. It is a thing. Specifically, the auxiliary sheet peeling part 310 and the melt impregnation part 320 of the process part 3 shown in FIG. 4 are replaced with the auxiliary sheet peeling part 310B and the melt impregnation part 320B.

  Similar to the auxiliary sheet peeling unit 310 (FIG. 4) of the process unit 3, the auxiliary sheet peeling unit 310B includes a slit forming unit 311, a slit end separation unit 312 and an auxiliary sheet peeling unit 313B. A non-bonded portion of the auxiliary sheet BS and the reinforced electrolyte precursor film 14f is formed on the reinforced electrolyte precursor film 14fBS with the auxiliary sheet fed from the reinforced electrolyte film unrolled part RO3B with the auxiliary sheet to the auxiliary sheet peeling part 310B by the slit forming part 311. A slit is formed so as to separate 14fBSm and the adhesive portion 14fBSg. In addition, the roll of reinforcing electrolyte precursor film 14fBS with auxiliary sheet wound in a roll shape is set in the reinforcing electrolyte precursor film unwinding portion RO3B with auxiliary sheet, and the reinforcing electrolyte precursor film 14fBS with auxiliary sheet is an auxiliary sheet. By being unwound from the attached reinforcing electrolyte precursor film unwinding portion RO3B, it is fed into the auxiliary sheet peeling portion 310B.

  The adhesion portion 14fBSg and the non-adhesion portion 14fBSm of the reinforced electrolyte precursor film 14fBS with the auxiliary sheet into which the slit is inserted are separated via the slit end separation portion 312, and the adhesion portion 14fBSg is wound up by the adhesion portion winding portion RI3Bg. The non-adhesive portion 14fBSm is conveyed to the auxiliary sheet peeling portion 313B. In the following, the non-adhesive portion 14fBSm of the reinforcing electrolyte precursor film 14fBS with auxiliary sheet is also referred to as "reinforcing electrolyte precursor film 14fBSm with auxiliary sheet".

  The auxiliary sheet peeling unit 313B includes a peeling roller 313c added to the peeling rollers 313a and 313b similar to the auxiliary sheet peeling unit 313 (FIG. 4) of the process unit 3, and a peeling roller pair formed by the peeling rollers 313a and 313c and the peeling roller 313a, It is composed of a pair of peeling rollers 313b. The auxiliary sheet-attached reinforcing electrolyte precursor film 14fBSm is conveyed so as to be sandwiched by the nip portion 313m of the pair of peeling rollers by the peeling rollers 313a and 313c, and further along the peeling roller 313a, The nip portion 313n is conveyed so as to be sandwiched. At this time, the auxiliary sheet BS in contact with the peeling roller 313a is peeled from the reinforcing electrolyte precursor film 14f by being conveyed along the peeling roller 313a, and is conveyed to the peeling auxiliary sheet take-up portion RBSc1 via the guide roller RG. Rolled up. Further, the auxiliary sheet BS in contact with the peeling roller 313c is also peeled off from the reinforcing electrolyte precursor film 14f by being conveyed along the peeling roller 313c, and is conveyed to the peeling auxiliary sheet take-up portion RBSc2 via the guide roller RG. It is wound up. The reinforcing electrolyte precursor film 14f from which the auxiliary sheets BS on both sides are peeled is sent to the melt impregnation portion 320B.

  Similarly to the melt impregnation unit 320 of the process unit 3, the melt impregnation unit 320 </ b> B includes a protective sheet overlay unit 321 and a melt impregnation execution unit 322. The melt impregnation execution unit 322 is composed of a melt impregnation roller pair composed of two melt impregnation rollers 322a and 322b. The protective sheet stacking unit 321 includes two peeling rollers 313 a and 313 b that constitute the auxiliary sheet peeling unit 313 and a melt impregnation roller 322 a that constitutes the melt impregnation execution unit 322. In the following description, these rollers 313a, 313b, and 322a are also referred to as “superposition rollers”.

  The protective sheet CS is superimposed on the reinforcing electrolyte precursor film 14f and is in contact with the overlapping roller 313b at the nip portion 313n of the overlapping roller pair formed by the two overlapping rollers 313a and 313b of the protective sheet overlapping portion 321. It is conveyed from the first protective sheet unwinding part RCS1 via the guide roller RG so as to be sandwiched. Thereby, the protective sheet CS is superimposed on one surface of the reinforced electrolyte precursor film 14f. The reinforcing electrolyte precursor film 14f having the protective sheet CS bonded to one surface is sandwiched by the nip portion 321n of the overlapping roller pair formed by the two overlapping rollers 313b and 322a of the overlapping portion 321 along the overlapping roller 313b. To be conveyed. In addition, the second protective sheet unwinding portion RCS2 is inserted into the nip portion 321n from the second protective sheet unwinding portion RCS2 via the guide roller RG so as to be overlapped and sandwiched by the other surface of the reinforcing electrolyte precursor film 14f on which the protective sheet CS is not overlapped. The protective sheet CS is conveyed. Thereby, the protective sheet CS is also superimposed on the other surface of the reinforced electrolyte precursor film 14f.

  The reinforced electrolyte precursor film 14fCS, in which the protective sheet CS is superimposed on both surfaces of the reinforced electrolyte precursor film 14f, has two melt impregnating rollers 322a along the melt impregnating roller 322a that has functioned as the superposing roller of the protective sheet superposing portion 321. , 322b is conveyed so as to be sandwiched by the nip portion 322n of the melt-impregnated roller pair, and further conveyed along the melt-impregnated roller 322b. At this time, the electrolyte precursor 11fm constituting the electrolyte precursor film 11f is melted and impregnated into the porous reinforcing film 12 bonded to both surfaces of the electrolyte precursor film 11f. Thereby, a reinforced electrolyte precursor film 10fa having a multilayer structure in which the porous reinforcing film 12 and the electrolyte precursor film 11f are integrated is formed, and the reinforcement with the protective sheet in which the protective sheet CS is superimposed on both surfaces of the reinforced electrolyte precursor film 10fa. The electrolyte precursor film 10faCS is produced. The produced reinforcing electrolyte precursor film with protective sheet 10faCS is conveyed to the reinforcing electrolyte precursor film winding part RI3B via the guide roller RG and wound.

  As described above, in the process section 3B, the reinforced electrolyte having a multilayer structure in which the electrolyte conductor 11fm of the electrolyte precursor film 11f is melt-impregnated and integrated with the porous reinforcing film 12 bonded to both surfaces of the electrolyte precursor film 11f. A precursor film 10fa is produced.

  Also in the present example, when the auxiliary sheet BS is peeled from the reinforcing electrolyte precursor film 14fBS with auxiliary sheet, the bonded portion 14fBSg and the non-bonded portion 14fBSm of the auxiliary sheet BS and the reinforcing electrolyte precursor film 14f are separated. Then, the auxiliary sheet BS on both sides of the separated non-adhesive portion 14fBsm is peeled off, and the reinforcing electrolyte precursor film 14f of the non-adhesive portion 14fBSm from which the auxiliary sheet BS is peeled off is used. In this case, since the auxiliary sheet BS of the non-adhesive portion 14fBSm and the reinforcing electrolyte precursor film 14f are not bonded via the adhesive region BSa, the auxiliary sheet BS can be easily peeled off, as described in the prior art. Generation | occurrence | production of the neck in by peeling of an auxiliary sheet can be suppressed. Thereby, an electrolyte membrane having a multilayer structure including a porous reinforcing material can be produced as an electrolyte membrane having excellent durability.

  FIG. 8 is a schematic diagram showing a process part 2Bv as a modification of the process part 2Ba and the process part 2Bb. In the above embodiment, in the electrolyte precursor film bonding part 220 (FIG. 2) of the process part 2Ba, the reinforcing film 12BS with an auxiliary sheet is bonded to one surface of the electrolyte precursor film 11f, and the reinforcement film bonding part of the process part 2Bb. In 240 (FIG. 6), the reinforcing film with auxiliary sheet 12BS is bonded to the other surface of the electrolyte precursor film 11f. On the other hand, in the process part 2Bv of the modified example, the electrolyte precursor film forming part 210 of the process part 2Ba, the electrolyte precursor film bonding part 220 of the process part 2Ba, and the reinforcing film bonding part 240 of the process part 2Bb are integrated. The electrolyte precursor film laminating portion 220Bv and the bonding end portion cutting portion 250 of the process portion 2Bb are configured. The electrolyte precursor film bonding unit 220Bv provides the bonding rollers 221a and 221b of the electrolyte precursor film bonding unit 220 with the functions of the bonding rollers 241a and 241b of the reinforcing film bonding unit 240, and a heater corresponding to the heater 242. 223 is provided. As a result, the electrolyte precursor film laminating portion 220Bv is formed of the reinforcing sheet with reinforcing sheet 12BS fed from the reinforcing film unwinding portions RO2Bv1 and RO2Bv2 in which the roll of the reinforcing film with auxiliary sheet 12BS is set, and the laminating rollers 221a and 221b. And are simultaneously bonded to both surfaces of the electrolyte precursor film 11f. According to the process part 2Bv of the modified example, the process can be simplified as compared with the embodiment.

  6 to 8, components that are not particularly necessary for explanation, such as a transport tension adjusting mechanism (a transport tension generating mechanism, a transport tension monitoring mechanism, a transport tension separating mechanism, etc.), a guide roller, and the like. However, in actuality, these components are appropriately added. Moreover, the bonding end part cutting part 250 of process part 2Bb (FIG. 6) and process part 2Bbv (FIG. 8) is not necessarily required, and can be abbreviate | omitted.

C. Third embodiment:
FIG. 9 is a flowchart showing the manufacturing process of the electrolyte membrane as the third embodiment of the present invention. In the manufacturing process of the electrolyte membrane of the third embodiment, step S20Bb (FIG. 5) of the second embodiment is replaced with step S20Cb, and step S30B (FIG. 5) is replaced with step S30C accordingly. 4 shows another example of producing an electrolyte membrane by bonding a porous reinforcing membrane to both sides.

  In step S20Cb, the porous reinforcing membrane is bonded to the surface of the reinforcing electrolyte precursor membrane with auxiliary sheet prepared in step S20Ba on which the porous reinforcing membrane is not bonded by the process unit 2Cb shown in FIG. FIG. 10 is a schematic diagram showing a process unit 2Cb that executes Step S20Cb in FIG.

  The process part 2Cb includes an extending part 260, a reinforcing film bonding part 240C, and a bonded end part cutting part 250C. The extending part 260 produces the porous reinforcing membrane 12 similarly to the extending part 110 in the process part 1 shown in FIG. 1, and sends it out to the reinforcing film bonding part 240C.

  The reinforcing film bonding unit 240C includes a bonding roller pair 241 formed by bonding rollers 241a and 241b and a heater 242 in the same manner as the reinforcing film bonding unit 240 of the process unit 2Bb illustrated in FIG. The reinforced electrolyte precursor film 13fBS with auxiliary sheet fed from the reinforced electrolyte precursor film unwinding portion RO2Cb2 with auxiliary sheet is conveyed so as to be sandwiched by the nip portion 241n along one bonding roller 241a of the bonding roller pair 241. Is done. Further, the porous reinforcing film 12 sent from the stretching unit 260 is conveyed to the bonding roller pair 241 so as to be sandwiched between the nip portions 241n of the bonding roller pair 241.

  The reinforcing electrolyte precursor film 13fBS with auxiliary sheet and the porous reinforcing film 12 are heated at a predetermined temperature (for example, 90 ° C.) by the heater 242 in the process of being conveyed to the nip portion 241n of the bonding roller pair 241, and the auxiliary sheet The electrolyte precursor film 11f of the attached reinforcing electrolyte precursor film 13fBS and the porous reinforcing film 12 are overlapped so as to be in contact with each other and are pressed by the bonding rollers 241a and 241b. At this time, the reinforcing electrolyte precursor film 13f is bonded so that the surface of the electrolyte precursor film 11f on the side where the porous reinforcing film 12 is not bonded and the porous reinforcing film 12 are bonded. As a result, a reinforced electrolyte precursor film 14fBSCr with an auxiliary sheet in which the auxiliary sheet BS is bonded only to one side of the reinforced electrolyte precursor film 14f in which the porous reinforcing film 12 is bonded to both surfaces of the electrolyte precursor film 11f is produced. And the produced reinforced electrolyte precursor film 14fBSCr with an auxiliary sheet is sent out to the bonded end portion cutting portion 250C.

  The bonded end portion cutting section 250C includes a slit forming section 251 and a slit end separating section 252 similarly to the bonded end section cutting section 250 of the process section 2Bb shown in FIG. In the bonded end portion cutout portion 250C, the slit forming portion 251 provides an outer end of the auxiliary sheet BS of the auxiliary electrolyte sheet with reinforcing sheet 14fBSCr produced by the reinforcing film bonded portion 240C and the bonded portion of the reinforcing electrolyte precursor film 14f. A slit is made along the conveying direction so as to cut out the portion. Then, the slit end separating portion 252 separates the end portion 14fBSCg outside the slit from the reinforcing electrolyte precursor film 14fBSCr with the auxiliary sheet into which the slit has been put, and is wound by the slit end winding portion RI2Cg. Further, the remaining reinforcing electrolyte precursor film 14fBSC with auxiliary sheet on the center side is wound up by the reinforcing electrolyte precursor film winding portion RI2Cb with auxiliary sheet.

  As described above, in the process parts 2Ba and 2Cb, the reinforced electrolyte precursor film 14f in which the porous reinforcing film 12 is bonded to both surfaces of the electrolyte precursor film 11f is produced, and only one side of the reinforced electrolyte precursor film 14f is supported. Affixed to the auxiliary sheet BS at the adhesive region BSa at the end of the sheet BS, the auxiliary sheet-attached reinforced electrolyte precursor film 14fBSC is produced.

  In step 30C shown in FIG. 9, after the auxiliary sheet is peeled off from the reinforcing electrolyte precursor film with auxiliary sheet and the heat-resistant protective sheet is overlaid by the process part 3C shown in FIG. 11, the electrolyte is placed in the porous reinforcing film. An electrolyte precursor constituting the precursor film is melted and impregnated to produce a composite film having a multilayer structure in which the electrolyte precursor film and the porous reinforcing film are integrated. FIG. 11 is a schematic diagram showing a process unit 3C that executes step S30C in FIG.

  The process part 3C corresponds to produce a composite film having a multilayer structure in which the electrolyte precursor film and the porous reinforcement film are integrated from the auxiliary sheet-added reinforcing electrolyte precursor film 14fBSC produced in the process parts 2Ba and 2Cb. It is a thing. Specifically, the auxiliary sheet peeling part 310B and the melt impregnation part 320B of the process part 3B shown in FIG. 7 are replaced with the auxiliary sheet peeling part 310C and the melt impregnation part 320C.

  The auxiliary sheet peeling part 310 </ b> C includes a slit forming part 311, a slit end separation part 312, and an auxiliary sheet peeling part 313, similarly to the auxiliary sheet peeling part 310 (FIG. 4) of the process part 3. The auxiliary sheet-attached reinforcing electrolyte precursor film 14fBSC sent from the auxiliary sheet-attached reinforcing electrolyte film unwinding section RO3C to the auxiliary sheet peeling section 310C is not bonded to the auxiliary sheet BS and the reinforcing electrolyte precursor film 14f by the slit forming section 311. A slit is formed so as to separate 14fBSCm and the adhesive portion 14fBSCg. In addition, the roll of the reinforcing electrolyte precursor film 14fBSC with auxiliary sheet wound in a roll shape is set in the reinforced electrolyte precursor film unwinding portion RO3C with auxiliary sheet, and the auxiliary electrolyte precursor film 14fBSC with auxiliary sheet is the auxiliary sheet. By being unwound from the attached reinforcing electrolyte precursor film unwinding portion RO3C, it is fed into the auxiliary sheet peeling portion 310C.

  The adhering portion 14fBSCg and the non-adhering portion 14fBSCm of the reinforcing electrolyte precursor film 14fBSC with an auxiliary sheet into which the slit is inserted are separated via the slit end separating portion 312 and the adhering portion 14fBSCg is wound by the adhesion portion winding portion RI3gC. The non-adhered portion 14fBSCm is conveyed to the auxiliary sheet peeling unit 313. Hereinafter, the non-bonded portion 14fBSCm of the reinforcing electrolyte precursor film 14fBSC with an auxiliary sheet is also referred to as “a reinforcing electrolyte precursor film 14fBSCm with an auxiliary sheet”.

  In the auxiliary sheet peeling part 313, the fed reinforcing electrolyte precursor film 14fBSCm with the auxiliary sheet is conveyed along the peeling roller 313a so as to be sandwiched by the nip part 313n of the pair of peeling rollers. At this time, the auxiliary sheet BS of the reinforcing electrolyte precursor film 14fBSCm with an auxiliary sheet sandwiched between the nip portions 313n is transported along the peeling roller 313a to be peeled from the reinforcing electrolyte precursor film 14f, and the guide roller RG is moved. Then, it is conveyed to the peeling assisting sheet winding unit RBSc1 and wound up. On the other hand, the reinforced electrolyte precursor film 14f from which the auxiliary sheet BS has been peeled is sent to the melt impregnation part 320C.

  Similar to the melt impregnation unit 320 of the process unit 3, the melt impregnation unit 320 </ b> C includes a protective sheet overlay unit 321 and a melt impregnation execution unit 322. In the protective sheet overlapping portion 321, the protective sheet CS is overlapped on both surfaces of the reinforcing electrolyte precursor film 14 f. In the melt impregnation executing unit 322, the electrolyte precursor 11fm constituting the electrolyte precursor film 11f is melted and impregnated in the porous reinforcing film 12 bonded to both surfaces of the electrolyte precursor film 11f. As a result, a reinforced electrolyte precursor film 10fa having a multilayer structure in which the porous reinforcing film 12 and the electrolyte precursor film 11f are integrated is formed, and the reinforcement with a protective sheet in which the protective sheets CS are bonded to both surfaces of the reinforced electrolyte precursor film 10fa. The electrolyte precursor film 10faCS is produced. The produced reinforcing electrolyte precursor film with protective sheet 10faCS is conveyed to the reinforcing electrolyte precursor film winding part RI3C via the guide roller RG and wound.

  As described above, in the process section 3C, the reinforced electrolyte precursor film 10fa having a multilayer structure in which the electrolyte driving body 11fm is melt-impregnated and integrated with the porous reinforcing film 12 bonded to both surfaces of the electrolyte precursor film 11f is manufactured. Is done.

  Also in the present embodiment, when the auxiliary sheet BS is peeled from the reinforcing electrolyte precursor film 14fBSC with auxiliary sheet, the bonded portion 14fBSCg and the non-bonded portion 14fBSCm of the auxiliary sheet BS and the reinforcing electrolyte precursor film 14f are separated. Then, the auxiliary sheet BS on both sides of the separated non-adhered part 14fBSCm is peeled off, and the reinforced electrolyte precursor film 14f of the non-adhered part 14fBSCm from which the auxiliary sheet BS is peeled off is used. In this case, since the auxiliary sheet BS of the non-adhered portion 14fBSCm and the reinforcing electrolyte precursor film 14f are not bonded via the adhesive region BSa, the auxiliary sheet BS can be easily peeled off, as described in the prior art. Generation | occurrence | production of the neck in by peeling of an auxiliary sheet can be suppressed. Thereby, an electrolyte membrane having a multilayer structure including a porous reinforcing material can be produced as an electrolyte membrane having excellent durability.

  10 and 11, components that are not particularly necessary for explanation, such as a transport tension adjusting mechanism (a transport tension generating mechanism, a transport tension monitoring mechanism, a transport tension separating mechanism, etc.), a guide roller, and the like. However, in actuality, these components are appropriately added. Further, the bonded end portion cutting portion 250C of the process portion 2Cb (FIG. 10) is not necessarily required and can be omitted.

D. Fourth embodiment:
FIG. 12 is a flowchart showing the manufacturing process of the electrolyte membrane as the fourth embodiment of the present invention. FIGS. 13, 14, and 15 are schematic views showing process units 1D, 2D, and 3D that execute the processes of steps S100, S200, and S300 in FIG.

  First, in step S100, a heat-resistant protective sheet is used as an auxiliary sheet by the process unit 1D shown in FIG. 13, and a porous reinforcing film is bonded to the protective sheet to prepare a reinforcing film with a protective sheet.

  The process part 1D includes an extending part 110D, a protective sheet bonding part 120D, and a bonded end part cutting part 130D, as in the process part 1 shown in FIG. The extending portion 110D produces the porous reinforcing film 12 in the same manner as the extending portion 110 (FIG. 2), and sends it to the protective sheet bonding portion 120D.

  The protective sheet bonding unit 120D includes a heater 122 in addition to the bonding roller pair 121 similar to the auxiliary sheet bonding unit 120 (FIG. 2). The belt-like porous reinforcing film 12 fed from the extending part 110 </ b> D to the protective sheet bonding part 120 </ b> D is conveyed to the bonding roller pair 121 so as to be sandwiched by the nip part 121 n of the bonding roller pair 121. The belt-shaped protective sheet DS fed from the protective sheet unwinding section RO1D to the bonding section 120 is conveyed so as to be sandwiched by the nip section 121n along one bonding roller 121a of the bonding roller pair 121. The In addition, the roll of the protection sheet DS wound in roll shape is set in the protection sheet unwinding part RO1D, and the protection sheet DS is unwound from the protection sheet unwinding part RO1D, so that the protection sheet bonding part It is sent to 120D. As the protective sheet DS, a film sheet made of a resin material such as tetrafluoroethylene / hexafluoropropylene copolymer (FEP) used as the protective sheet CS in the first to fourth embodiments is used. A heat resistant sheet is used.

  The porous reinforcing film 12 and the protective sheet DS conveyed so as to be sandwiched between the nip portions 121n are superposed so as to be in contact with each other at the nip portions 121n, and are bonded to each other by being pressed by the bonding rollers 121a and 121b. Thereby, the reinforcing film with protective sheet 12DSr is produced. Then, the produced reinforcing film with protective sheet 12DSr is sent out to the bonded end cutting part 130D.

  Here, the protective sheet DS has only the end regions (hereinafter referred to as “thermal welding regions”) DSa in the width direction perpendicular to the transport direction in the process of being transported to the nip portion 121n along the bonding roller 121a. The heater 122 is melted by being heated to a melting temperature (for example, about 250 to 350 ° C.). As a result, the porous reinforcing film 12 is not bonded to the entire surface of the protective sheet DS, but is attached to the protective sheet DS only through the heat-welded regions DSa provided at both ends of the protective sheet DS. Glued.

  The bonded end portion excision portion 130D includes a slit forming portion 131 and a slit end separation portion 132, similarly to the bonded end portion excision portion 130 (FIG. 2). Similar to the bonded end portion cutout portion 130, the bonded end portion cutout portion 130D is bonded by the slit forming portion 131 in the heat-welded region DSa of the reinforcing sheet with protective sheet 12DSr produced in the auxiliary sheet bonding portion 120D. A slit is formed along the conveying direction so as to cut off the outer end of the bonded portion. Then, the end portion 12DSg outside the slit is separated from the reinforcing film with protective sheet 12DSr into which the slit is inserted by the slit end separation portion 132. The separated outer end portion 12DSg is wound up by the slit end winding portion RI1Dg. Further, the remaining reinforcing film 12DS with protective sheet on the center side is wound up by the reinforcing film winding portion RI1D with protective sheet.

  As described above, in the process part 1D, the reinforcing film 12DS with a protective sheet in which the end of the porous reinforcing film 12 is bonded to the protective sheet DS via the heat welding region DSa is prepared.

  Next, in step S200 in FIG. 12, an electrolyte precursor film is formed by the process part 2D shown in FIG. 14, and the reinforcement with a protective sheet produced in the process part 1D in step S100 is formed on one surface of the electrolyte precursor film. Bond the membranes together.

  Similar to the process unit 2 shown in FIG. 3, the process unit 2D includes an electrolyte precursor film forming unit 210D, an electrolyte precursor film bonding unit 220D, and a bonded end portion cutting unit 230D. The electrolyte precursor film deposition unit 210D includes a paste extruder 211, a transport roller 212, and a dryer 213, similarly to the electrolyte precursor film deposition unit 210 (FIG. 3). In the electrolyte precursor film forming unit 210D, as in the electrolyte precursor film forming unit 210, the paste-like electrolyte precursor 11fm is extruded from the paste extruder 211 to be formed into a thin film shape, and is dried by the dryer 213 to be used as an electrolyte. A precursor film 11f is formed and sent to the electrolyte precursor film bonding section 220D by the transport roller 212.

  The electrolyte precursor film bonding unit 220 </ b> D includes a bonding roller pair 221 and a heater 222, similarly to the electrolyte precursor film bonding unit 220 (FIG. 3). In the electrolyte precursor film bonding unit 220D, similarly to the electrolyte precursor film bonding unit 220, the electrolyte precursor film 11f fed from the electrolyte precursor film deposition unit 210D by the bonding roller pair 221 and the reinforcing film unwinding unit RO2D. And the reinforcing film with protective sheet 12DS heated to a predetermined temperature (for example, 90 ° C.) by the heater 222 are bonded together to produce the reinforcing electrolyte precursor film with protective sheet 13fDSr. The produced reinforced electrolyte precursor film 13fDSr with protective sheet is sent out to the bonded end portion cutting portion 230D.

  The bonded end portion excision part 230 </ b> D includes a slit forming part 231 and a slit end separation part 232, similarly to the bonded end part excision part 230 (FIG. 3). In the bonded end portion cutout portion 230D, similarly to the bonded end portion cutout portion 230, the heat forming region DSa of the reinforcing electrolyte precursor film with protective sheet 13fDSr produced by the electrolyte precursor film bonded portion 220D by the slit forming portion 231. A slit is formed along the conveying direction so as to cut off the outer end of the bonded portion bonded in step (b). Then, the end portion 13 fDSg outside the slit is separated by the slit end separating portion 232 from the reinforcing electrolyte precursor film with protective sheet 13 fDSr in which the slit is inserted. The separated outer end portion 13fDSg is wound up by the slit end winding portion RI2DG. Further, the remaining reinforcing electrolyte precursor film 13fDS with protective sheet on the center side is wound up by the reinforcing electrolyte precursor film winding portion RI2D with protective sheet.

  As described above, in the process part 2D, the reinforced electrolyte precursor film 13f in which the porous reinforcing film 12 is bonded to one surface of the electrolyte precursor film 11f is produced, and the reinforced electrolyte precursor film 13f is the end of the protective sheet DS. The protective sheet-attached reinforced electrolyte precursor film 13fDSr is produced by being bonded to the protective sheet DS in the thermal welding region DSa of the portion.

  Next, in step S300 of FIG. 12, the electrolyte precursor film and the porous reinforcing film are integrated by melting and impregnating the electrolyte precursor constituting the electrolyte precursor film in the porous reinforcing film by the process 3D shown in FIG. A composite film having a multi-layered structure is produced, and an adhesive portion of the protective sheet due to the heat welding region is cut out. The process part 3D includes a melt impregnation part 320D and an adhesive part cutting part 330D.

  Similar to the melt impregnation unit 320 of the process unit 3 shown in FIG. 4, the melt impregnation unit 320 </ b> D includes a protective sheet overlay unit 321 and a melt impregnation execution unit 322. The melt impregnation execution unit 322 is composed of a melt impregnation roller pair composed of two melt impregnation rollers 322a and 322b. The protective sheet superimposing portion 321 is composed of a superposing roller pair composed of superposing rollers 313a and 313b.

  The protective sheet DS is attached to the nip portion 313n of the overlapping roller pair formed by the two overlapping rollers 313a and 313b of the protective sheet overlapping portion 321 with the protective sheet fed from the reinforcing electrolyte precursor film unwinding portion RO3D with protective sheet. The protective sheet DS is fed from the protective sheet unwinding portion RDS via the guide roller RG so that the protective sheet DS of the reinforced electrolyte precursor film 13fDS is overlapped and sandwiched between the surfaces that are not overlapped. Thereby, the protective sheet DS is superimposed on the surface of the reinforced electrolyte precursor film 13f on which the protective sheet DS is not superimposed, and the reinforced electrolyte precursor film with a protective sheet in which the protective sheet DS is superimposed on both surfaces of the reinforced electrolyte precursor film 13f. 13fDSr is produced. In addition, the roll of the reinforcing electrolyte precursor film 13fDS with the protective sheet wound in a roll shape is set in the reinforcing electrolyte precursor film unwinding portion RO3D with the protective sheet, and the reinforcing electrolyte precursor film 13fDS with the protective sheet is the protective sheet. By being unwound from the attached reinforcing electrolyte precursor film unwinding portion RO3D, it is fed into the protective sheet overlapping portion 321.

  The produced reinforced electrolyte precursor film 13fDSr with protective sheet is conveyed along the melt impregnation roller 322a of the melt impregnation execution unit 322 so as to be sandwiched by the nip portion 322n of the pair of melt impregnation rollers by the two melt impregnation rollers 322a and 322b. Further, it is conveyed along the melt impregnation roller 322b. The melt impregnation rollers 322a and 322b are heated at a temperature at which the electrolyte precursor 11fm constituting the electrolyte precursor film 11f is melted, for example, a temperature of about 170 to 230 ° C. And it is pressurized by being pinched in nip part 322n. As a result, the electrolyte precursor 11fm constituting the electrolyte precursor film 11f is melted and impregnated in the porous reinforcing film 12, and the reinforced electrolyte precursor film having a multilayer structure in which the porous reinforcing film 12 and the electrolyte precursor film 11f are integrated. 10f is formed, and the reinforced electrolyte precursor film 10fDSr with protective sheet in which the protective sheet DS is overlaid is manufactured. The produced reinforced electrolyte precursor film 10fDSr with protective sheet is sent out to the bonded portion cutting portion 330D.

  The bonding part cutting part 330D includes a slit forming part 331 and a slit end separating part 332. Similar to the slit forming part 131 of the process part 1 shown in FIG. 2, the slit forming part 331 is composed of a roller pair of two round blade rollers 331a and 331b. The slit end separation portion 332 is composed of one separation roller. Similarly to the slit end separation part 132 of the process part 1 shown in FIG. 2, it is good also as a roller pair by two separation rollers.

  In the slit forming portion 331, a slit is formed on the reinforcing electrolyte precursor film with a protective sheet 10fDSr so as to separate the bonded portion 10fDSg and the non-bonded portion 10fDSm by thermal welding between the protective sheet DS and the reinforcing electrolyte precursor film 10f. The adhesive portion 10fDSg and the non-adhesive portion 10fDSm of the reinforcing electrolyte precursor film with protective sheet 10fDSr into which the slit is inserted are separated from each other through the slit end separation portion 332, and the adhesive portion 10fDSg is wound around the adhesion portion winding portion RI3Dg. The non-adhered portion 10fBSm is wound around the reinforcing electrolyte precursor film winding portion RI3D as the reinforcing electrolyte precursor film with protective sheet 10fDS.

  As described above, in the process part 3D, the reinforced electrolyte having a multilayer structure in which the electrolyte drive body 11fm of the electrolyte precursor film 11f is melt-impregnated and integrated with the porous reinforcing film 12 bonded to one surface of the electrolyte precursor film 11f. The precursor film 10f is produced.

  Finally, in step 400 of FIG. 12, similarly to step S10 of FIG. 1, the reinforcing electrolyte precursor membrane 10f is hydrolyzed to make the electrolyte precursor an electrolyte having proton conductivity. An electrolyte membrane having a multilayer structure including a quality reinforcing material is produced.

  In this embodiment, since the porous reinforcing film 12 bonded to the protective sheet DS as the auxiliary sheet is used by bonding to the electrolyte precursor film 11f, the step of peeling the auxiliary sheet before melt impregnation is omitted. Can do. Further, in the produced reinforced electrolyte precursor film with protective sheet 10fDS, since the adhesion portion by thermal welding between the reinforced electrolyte precursor film 10f by thermal welding and the protective sheet DS is removed, when peeling the protective sheet DS, The occurrence of neck-in as described in the prior art can be suppressed. Thereby, an electrolyte membrane having a multilayer structure including a porous reinforcing material can be produced as an electrolyte membrane having excellent durability.

E. Example 5:
FIG. 16 is a flowchart showing the manufacturing process of the electrolyte membrane as the fifth embodiment of the present invention. In the manufacturing process of the electrolyte membrane of the fifth embodiment, step S200 (FIG. 12) of the fourth embodiment replaces steps S200Ea and S200Eb, and step S300 (FIG. 12) is replaced with step S300E accordingly. As an example, an electrolyte membrane is produced by using a protective sheet and bonding a porous reinforcing membrane to both surfaces of the electrolyte precursor membrane.

  In step S200Ea, an electrolyte precursor film is formed by the process part 2Ea, and the reinforcing sheet with protective sheet produced in the process part 1D of step S100 is bonded to one surface of the electrolyte precursor film. Since this process part 2Ea is the same as the process part 2D shown in FIG. 14, illustration and description are omitted. In step S200Eb, the process portion 2Eb further bonds a reinforcing film with a protective sheet to the other surface on which the porous reinforcing film of the electrolyte precursor film is not yet bonded. This process part 2Eb is the same as the case where the reinforcing film 12DS with a protective sheet is used instead of the reinforcing film 12BS with the auxiliary sheet to be bonded to the electrolyte precursor film in the process part 2Bb of the second embodiment shown in FIG. The illustration and description are omitted. By the process parts 2Ea and 2Eb, a reinforced electrolyte precursor film 14f in which the porous reinforcing film 12 is bonded to both surfaces of the electrolyte precursor film 11f is produced, and both surfaces of the reinforced electrolyte precursor film 14f are formed at the end portions of the protective sheet DS. Affixed to the protective sheet DS in the heat welding region DSa, a reinforced electrolyte precursor film 14fDS with protective sheet is produced.

  In step 300E shown in FIG. 16, the process part 3E shown in FIG. 17 melts and impregnates the electrolyte precursor constituting the electrolyte precursor film in the porous reinforcing film, so that the electrolyte precursor film and the porous reinforcing film are integrated. A composite film having a multilayered structure is prepared, and an adhesive portion of the protective sheet due to the heat welding region is cut out. FIG. 17 is a schematic diagram showing a process unit 3E that executes step S300E in FIG.

  The process part 3E includes a melt impregnation part 320E and an adhesive part cutting part 330E. The melt impregnation unit 320E is configured to have a melt impregnation execution unit 322 by omitting the protective sheet overlaying unit 321 of the melt impregnation unit 320D of the process unit 3D shown in FIG. To the melt impregnation executing unit 322, the reinforcing electrolyte precursor membrane with protective sheet 14fDS unwound from the reinforcing electrolyte precursor membrane unwinding portion RO3E with protective sheet is sent. In addition, the roll of the reinforcing electrolyte precursor film 14fDS with protective sheet, which is produced by the process parts 2Ea and 2Eb and wound in a roll shape, is set in the reinforcing electrolyte precursor film unwinding part RO3E with protective sheet.

  In the melt impregnation execution unit 322, the electrolyte reinforcing body 11fm of the electrolyte precursor film 11f is melt-impregnated into the porous reinforcing film 12 of the reinforced electrolyte precursor film 14f in which the porous reinforcing film 12 is bonded to both surfaces of the electrolyte precursor film 11f. Thus, a reinforced electrolyte precursor film 10fa having a multilayer structure is formed, and a reinforced electrolyte precursor film 10faDSr with a protective sheet in which a protective sheet DS is bonded to both surfaces of the reinforced electrolyte precursor film 10fa is produced. The produced reinforcing electrolyte precursor film with protective sheet 10faDSr is sent out to the bonded portion cutting portion 330E.

  The adhesion part cutting part 330E is provided with the slit formation part 331 and the slit edge separation | spacing part 332 similarly to the adhesion part cutting part 330D shown in FIG. In the slit forming portion 331, a slit is inserted into the reinforced electrolyte precursor film 10faDSr with protective sheet so as to separate the bonded portion 10faDSg and the non-bonded portion 10faDSm by thermal welding of the protective sheet DS and the reinforced electrolyte precursor film 10fa. The adhesive portion 10faDSg and the non-adhesive portion 10faDSm of the reinforced electrolyte precursor film 10faDSr with a protective sheet with slits are separated by a slit end separation portion 332, and the adhesive portion 10faDSg is wound around the adhesion portion winding portion RI3Eg. The adhesion portion 10faBSm is wound around the reinforcing electrolyte precursor film winding portion RI3E as a reinforcing electrolyte precursor film 10faDS with a protective sheet.

  As described above, in the process section 3E, the reinforced electrolyte having a multilayer structure in which the electrolyte drive body 11fm of the electrolyte precursor film 11f is melt-impregnated and integrated with the porous reinforcing film 12 bonded to both surfaces of the electrolyte precursor film 11f. Reinforcing with a protective sheet in which the precursor film 10fa is produced, and the adhesive portion 10faDSg by heat welding between the protective sheet DS and the reinforced electrolyte precursor film 10fa is cut off, and the protective sheet DS is superimposed on both surfaces of the reinforced electrolyte precursor film 10fa The electrolyte precursor film 10faDS is produced.

  Also in this embodiment, the porous reinforcing film 12 bonded to the protective sheet DS as the auxiliary sheet is bonded to both surfaces of the electrolyte precursor film 11f, and the step of peeling the auxiliary sheet before melt impregnation may be omitted. it can. In addition, in the produced reinforced electrolyte precursor film with protective sheet 10faDS, the adhesive portion 10a DSg between the reinforced electrolyte precursor film 10fa and the protective sheet DS by heat welding is removed, so when peeling the protective sheet DS, The occurrence of neck-in as described in the prior art can be suppressed. Thereby, an electrolyte membrane having a multilayer structure including a porous reinforcing material can be produced as an electrolyte membrane having excellent durability.

  In this embodiment, the porous reinforcing film 12 bonded to the protective sheet DS is bonded to both surfaces of the electrolyte precursor film 11f, and the porous reinforcing film 12 is bonded to both surfaces of the electrolyte precursor film 11f. Although the case where the membrane 14f is produced is shown as an example, only the porous reinforcing membrane 12 produced by the stretched portion is formed on the surface of the one electrolyte precursor membrane 11f as in the third embodiment (FIG. 10). The reinforcing electrolyte precursor film 14f may be manufactured by bonding and bonding. The bonded porous reinforcing membrane 12 is subjected to melt impregnation after the protective sheet DS is overlaid using the same process part as the process part 3D (FIG. 15) of the fourth embodiment. May be.

F. Variations:
In addition, elements other than the elements claimed in the independent claims among the constituent elements in the above embodiment are additional elements and can be omitted as appropriate. The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the scope of the invention.

  In the above embodiment, the case where both end portions in the width direction perpendicular to the conveyance direction of the auxiliary sheet are bonded portions along the conveyance direction is described as an example, but not only both end portions but also the intermediate portion. One or more adhesive portions may be provided, and the adhesive portions may be excised before peeling off the auxiliary sheet. Moreover, you may make it provide one or more adhesion parts not in both ends but in any one edge part or an intermediate part. That is, an adhesive portion that is bonded to the auxiliary sheet and a non-adhesive portion that is not bonded are provided, and the bonded portion may be cut off.

  In the above embodiment, the manufacturing process of the electrolyte membrane is described as an example. However, the present invention is not limited to this, and can be applied to the manufacture of various thin films for producing a multilayer composite film.

DESCRIPTION OF SYMBOLS 110 ... Extending part 120 ... Auxiliary sheet laminating part 121 ... Laminating roller pair 121a, 121b ... Laminating roller 121n ... Nip part 130 ... Laminating edge part cutting part 131 ... Slit forming part 131
131a, 131b ... round blade roller 131n ... nip part 132 ... slit end separation part 132a, 132b ... separation roller 132n ... nip part RO1 ... auxiliary sheet unwinding part RI1 ... reinforcing sheet winding part with auxiliary sheet RI1g ... slit end part winding Take-up part 12 ... Porous reinforcing film BS ... Auxiliary sheet BSa ... Adhesive area DS ... Protective sheet DSa ... Adhesive area 12BS, 12BSr ... Reinforcing film with auxiliary sheet 210, 210D ... Electrode precursor film forming part 211 ... Paste extruder 212 ... Conveying roller 213... Dryer 220, 220 </ b> D, 220 </ b> Bv... Electrolyte precursor film laminating portion 221... Laminating roller pair 221 a, 221 b ... laminating roller 221 n .. nip portion 222 ... heater 223 ... heater 230, 230 D. 231 ... Slit forming part 232 ... Slit edge separation portion 11f ... Electrolyte precursor film 11fm ... Electrolyte precursor 13f ... Reinforced electrolyte precursor film 13fBS, 13fBSr ... Reinforced electrolyte precursor film with auxiliary sheet RO2 ... Reinforced film unwinding part RI2 ... Reinforced electrolyte precursor film with auxiliary sheet Take-up portion RI2g ... Slit end take-up portion 240, 240C ... Reinforcement film laminating portion 241 ... Bonding roller pair 241a, 241b ... Laminating roller 241n ... Nipping portion 242 ... Heater 250, 250C ... Pasting end cutting portion 251 ... Slit forming part 251a, 251b ... Round blade roller 252 ... Slit end separating part 252a, 252b ... Separating roller 260 ... Extending part RO2Bb1, ... Reinforcing film unwinding part RO2Bv1, RO2Bv2 ... Reinforcing film unwinding part RO2Bb2 ... Reinforcement with auxiliary sheet Electrolyte precursor film Unwinding part RO2Cb2 ... Reinforcement electrolyte precursor film with auxiliary sheet unwinding part RI2Bb, RI2Cb ... Reinforcement electrolyte precursor film with auxiliary sheet winding part RI2Bv ... Reinforcement electrolyte precursor film with auxiliary sheet winding part RI2Bg, RI2Cg ... Rewinding slit end Part RO2D ... Reinforcement electrolyte precursor film unwinding part with protective sheet RI2D ... Reinforcement electrolyte precursor film winding part with protection sheet 14f, 14fa ... Reinforcement electrolyte precursor film 14fBS, 14fBSr ... Reinforcement electrolyte precursor film with auxiliary sheet 310, 310B, 310C ... Auxiliary sheet peeling part 311 ... slit forming part 312 ... slit end separation part 313, 313B ... auxiliary sheet peeling part 313a, 313b, 313c ... peeling roller (superposition roller)
313m: Nip part 313n: Nip part 320, 320B, 320C, 320D, 320E ... Melt impregnation part 321 ... Protection sheet superposition part 322 ... Melt impregnation execution part 322a ... Melt impregnation roller (superposition roller)
322b ... melt impregnated roller 322n ... nip part 330D, 330E ... adhesive part cutting part 331 ... slit forming part 331a, 331b ... round blade roller 332 ... slit end separation part RO3, RO3B, RO3C ... reinforced electrolyte precursor film unwinding with auxiliary sheet Part RO3D, RO3E ... Reinforcement electrolyte precursor film unwinding part with protective sheet RBSc ... Peeling auxiliary sheet winding part RBSc1, RBSc2 ... Peeling auxiliary sheet winding part RCS1, RCS2 ... Protective sheet unwinding part RI3, RI3B, RI3C, RI3D, RI3E: Reinforced electrolyte precursor film winding part RI3g, RI3Bg, RI3Cg ... Adhered part winding part 14fBSg ... Adhered part 14fBSm ... Non-adhered part 14fCS, 14faCS ... Reinforced electrolyte precursor film 10f, 10fa ... Reinforced electrolyte precursor film

Claims (6)

An electrolyte membrane manufacturing method comprising:
The auxiliary sheet and the electrolyte are obtained by excising an adhesive portion where the auxiliary sheet and the electrolyte membrane member are bonded from an electrolyte membrane member with an auxiliary sheet in which the electrolyte membrane member is bonded onto the auxiliary sheet. The manufacturing method of an electrolyte membrane including the process of isolate | separating the said auxiliary | assistant sheet | seat and the said member for electrolyte membranes of the non-bonding part to which the member for membranes is not adhere | attached. It is a manufacturing method of the electrolyte membrane according to claim 1,
The said adhesion part is a manufacturing method of the electrolyte membrane which is the edge part of the width direction of the said member for electrolyte membranes with an auxiliary sheet. A method for producing an electrolyte membrane according to claim 1 or claim 2,
The method for manufacturing an electrolyte membrane, wherein the adhesive portion is formed by thermally melting a region corresponding to the adhesive portion of the auxiliary sheet and bonding the auxiliary sheet and the electrolyte membrane member. The method for producing an electrolyte membrane according to any one of claims 1 to 3, further comprising:
A step of joining the first electrolyte membrane member and the second electrolyte membrane member bonded to the auxiliary sheet in a region corresponding to the adhesive portion to produce the auxiliary membrane-attached electrolyte membrane member A method for producing an electrolyte membrane, comprising: The method for producing an electrolyte membrane according to claim 4, further comprising:
The manufacturing method of an electrolyte membrane including the process of bonding the said 2nd member for electrolyte membranes to the said auxiliary sheet in the area | region corresponding to the said adhesion part. A method for producing an electrolyte membrane according to claim 4 or claim 5, wherein
The first electrolyte membrane member is an electrolyte polymer precursor film formed of an electrolyte polymer precursor, which is a stage before proton conductivity is imparted, and the second electrolyte membrane member is a porous material having pores. The manufacturing method of the electrolyte membrane which is a quality reinforcement membrane.

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