JP2013212673A - Wet process manufacturing apparatus and method of separator film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent occurrence of a problem by oil etc. intervening between a roll and a film upper part by removing the oil of a roll upper part by providing an upper part scraper for at least the roll upper part of the roll.SOLUTION: In a wet process manufacturing apparatus and a method of a separator film, an upper part scraper (10) comprises: a body (15); a scraper blade (18) provided in the body (15) and slides and contacts to the peripheral surfaces of rolls (55, and 57); a guide blade (22) which is disposed opposite to the tip of the scraper blade (18) through a gap (G); and an oil receiver (21) connected to the guide blade (22). The oil scraped by the scratch blade (18) is led by the guide blade (22) through the gap (G) and is made to enter the oil receiver (21).

Description

  The present invention relates to a separator film wet manufacturing apparatus and method, and in particular, an upper scraper is provided at least on the upper part of the roll to remove oil on the upper part of the roll, thereby preventing problems caused by oil or the like interposed between the roll and the film. For new improvements.

Conventionally, examples of the wet manufacturing apparatus and method for this kind of separator film include, for example, Patent Documents 1 to 3 described later, but here, the porous film disclosed in Patent Document 1 is included therein. The manufacturing method of a quality film is demonstrated using FIG.7 and FIG.8.
That is, as shown in FIG. 7, a schematic view of a film manufacturing facility 40 that manufactures a porous film 38 from a solution 15 containing a polymer as a raw material and a solvent is shown. The film manufacturing facility 40 includes a tank 41 that stores the solution 15, a stirring blade 41 a provided in the tank 41, a casting chamber 42, and a pump 43 that sends the solution 15 stored in the tank 41 to the casting chamber 42. And a winder 44 that winds up the porous film 38 sent out from the casting chamber 42. The tank 41 is provided with a jacket 41b. By sending a heat transfer medium adjusted to a predetermined temperature to the jacket 41b, the temperature of the solution 15 in the tank 41 can be kept substantially constant within a predetermined range.

  The casting chamber 42 has a first zone 51 to a third zone 53. In the first zone 51, the casting step 11, the discrimination step 12, and the water droplet formation and growth step 13 are performed, in the second zone 52, the water droplet evaporation step 14 is performed (see FIG. 1), and in the third zone 53, each step is performed. The cast film that has passed through 11 to 14 is peeled off from the support, becomes a porous film 38, and is sent out to the casting chamber 42.

  The casting chamber 42 is provided with rotating rollers 55 and 56. The casting band 57 is stretched around the rotating rollers 55 and 56. The rotating roller 56 is connected to a driving unit (not shown). By this drive unit, the rotation roller 56 is driven to rotate, and the rotation of the rotation roller 56 causes the casting band 57 to travel in the first zone 51 to the third zone 53 in an endless manner. Note that a drive unit (not shown) may be connected to the rotation roller 56 instead of the rotation roller 55 to rotate the rotation roller 56.

  It is preferable that the conveying direction of the casting band 57 is adjusted to be within ± 10 ° with respect to the horizontal direction. Similarly, the transport direction of the casting band 57 in the width direction substantially orthogonal to the transport direction is also preferably within ± 10 ° with respect to the horizontal direction. By adjusting the inclination of the casting band 57 in the transport direction and the width direction, the form of the water droplet 25 (see FIGS. 1 and 2) formed in the water droplet formation growth step 13 can be adjusted.

  Further, the first zone 51 is provided with a casting die 60 and a wet air supply device 61, the second zone 52 is provided with a dry air supply device 64, and the third zone 53 is stripped. A roller 66 is provided. The casting die 60 is provided in the vicinity of the upper portion of the casting band 57 and is connected to the tank 41 via the pump 43. The solution 15 sent from the tank 41 flows out onto the casting band 57 by the casting die 60, and forms a cast film 68 on the surface 57 a of the casting band 57. The stripping roller 66 strips the cast film 68 from the casting band 57 as the porous film 38 and sends it to the winder 44.

  The finishing accuracy of the inner wall surface of the slit provided in the casting die 60 is preferably 1 μm or less in terms of surface roughness, and the straightness is preferably 1 μm / m or less in any direction. In order to keep the temperature of the solution 15 passing through the slit substantially constant within a predetermined range, it is preferable to attach a temperature controller (for example, a heater, a jacket, etc.) to the casting die 60. Furthermore, it is preferable to use a slit whose average value is adjustable within a range of 0.05 mm to 3.5 mm by automatic adjustment. And it is preferable to provide a thickness adjusting bolt (heat bolt) in the casting die 60 at a predetermined interval. As a method of adjusting the film thickness x of the cast film 68, feedback control is performed based on the amount of the pump 43 fed or a profile of a thickness gauge (not shown) (for example, an infrared thickness gauge) to adjust the clearance to a predetermined value. You may do it.

  Further, as shown in FIG. 8, the humid air supply device 61 includes a blower port 71, a suction port 72, and an infrared radiation thermometer 73 provided so as to face the exposed surface 68 a of the cast film 68. The infrared radiation thermometer 73 measures the temperature T1 of the exposed surface 68a of the cast film 68. The number of infrared radiation thermometers 73 is not limited to one, and a plurality of infrared radiation thermometers 73 may be provided. When a plurality of infrared radiation thermometers 73 are provided, for example, they may be arranged in the transport direction of the cast film 68 or in a direction perpendicular to the transport direction.

  The control unit 80 is connected to the humid air supply device 61 and the temperature controller 75. The control unit 80 starts and stops the blowing process for sending the wet air 400 adjusted to a predetermined condition from the blower port 71, and starts and stops the suction process for sucking the wet air 400 and the like in the vicinity of the suction port 72, respectively. Do. In addition, the control unit 80 reads the temperature T1 of the exposed surface 68a measured by the infrared radiation thermometer 73, and independently sets the temperature TA1, the dew point TW1, and the condensation point TY1 of the solvent in a desired range. Adjust to a substantially constant with. Further, the control unit 80 adjusts the temperature of the rotary rollers 55 and 56 via the temperature controller 75 attached to the rotary rollers 55 and 56, and the temperature T3 of the surface 57a of the casting band 57 is within a predetermined range. Adjust to approximately constant. Examples of the temperature adjustment method include a method in which a liquid flow path is provided inside the rotary rollers 55 and 56 and the heat transfer medium is fed into the liquid flow path for adjustment.

  As shown in FIG. 7, the dry air supply device 64 includes a blower opening and a suction opening provided so as to face the exposed surface 68 a and an infrared radiation thermometer. Since the structure of the dry air supply machine 64 is the same as that of the wet air supply machine 61, the detailed description is omitted. The water droplet evaporation process 14 is performed by applying dry air 410 adjusted to a predetermined condition to the exposed surface 68a by a control unit (not shown).

JP 2009-212238 A JP 2000-109586 A JP 2000-119432 A

Since the conventional method for producing a porous film is configured as described above, the following problems exist.
In general, in the wet method, which is the mainstream method for producing a porous film, a thermoplastic resin composition mixed with a filler or a plasticizer is molded into a film with a T-die or the like, and then the filler or plasticizer is removed from the film. It is made porous by extraction or the like. Liquid paraffin or the like (hereinafter referred to as oil or the like) is used as the filler or plasticizer, and the oil or the like adheres to a roll that heats, cools, or stretches the film. The oil or the like adhering to the roll surface is interposed between the roll and the film and inhibits efficient heat exchange, causing a problem that the film slips on the roll surface and the stretching of the film becomes unstable. Therefore, in order to perform stable molding, it is necessary to always keep the roll in a clean state.

Therefore, when the film is subjected to heat exchange of heating and cooling alternately wound on the front and back of a plurality of rolls, it is not disclosed to provide a scraper in each of the aforementioned Patent Documents 1 to 3, for example, the center of the roll When the film is wound above the line, it is easy to scrape off oil or the like adhering to the roll surface by pressing a scraper provided below the center line of the roll against the roll surface. However, when the film is wound below the center of the roll, it is difficult to effectively remove oil or the like even if a similar scraper is provided above the center line of the roll.
Therefore, the present invention provides a wet separator manufacturing apparatus having a scraper that effectively scrapes oil even above the center line of a roll.

  The separator film wet manufacturing apparatus according to the present invention includes a plurality of separator films for a lithium ion secondary battery extruded from a T-die, from a roll center to an upper roll upper part and from a roll center to a lower roll lower part. Through the heat treatment, cooling treatment and stretching treatment any one or more or all of the treatment, and at least on the peripheral surface of the roll by the upper scraper arranged to contact the peripheral surface of the upper portion of the roll In the separator film wet manufacturing apparatus that scrapes off at least the attached oil, the upper scraper includes a main body, a scraping blade that is provided on the main body and is in sliding contact with a peripheral surface of the roll, and a tip of the scraping blade A guide blade disposed opposite to the gap with an oil receiver connected to the guide blade, The oil scraped off by the blade is guided to the guide blade through the gap and enters the oil receiver, and for supporting the main body movably in the biaxial direction. The first and second scraping blade adjustment bolts are provided in a biaxial direction orthogonal to the main body and screw portions are screwed into the fixed body. The main body is moved in two axial directions with respect to the fixed body by rotation of a scraping blade adjusting bolt, and the sliding contact state between the scraping blade and the peripheral surface is changed, and the upper scraper is Above the center of the roll, disposed on the ¼ surface behind the normal line in the rotational direction, the contact position of the scraping blade with the upper part of the roll is 30 degrees or more from the vertical direction, Is the separator film wet manufacturing method according to the present invention a T-die? The extruded separator film for a lithium ion secondary battery is either a heat treatment, a cooling treatment and a stretching treatment from the roll center of the roll composed of a plurality of rolls through the upper part of the upper roll and the lower part of the lower roll from the roll center, or A wet separator film that performs a plurality of or all of the above treatments, and at least removes oil adhering to the peripheral surface of the roll by an upper scraper disposed so as to contact the peripheral surface of the upper portion of the roll. In the manufacturing method, the upper scraper includes a main body, a scraping blade that is provided on the main body and that is in sliding contact with a peripheral surface of the roll, and a guide blade that is disposed to face the tip of the scraping blade with a gap therebetween. An oil receiver connected to the guide blade, and the oil scraped off by the scraping blade passes through the gap. And is provided in a biaxial direction orthogonal to the main body and a fixed body for supporting the main body so as to be movable in the biaxial direction. The first and second scraping blade adjustment bolts are screwed into the fixed body, and the main body is moved relative to the fixed body by the rotation of the first and second scraping blade adjustment bolts. It is a method of moving in the axial direction to change the sliding contact state between the scraping blade and the peripheral surface, and the upper scraper is above the roll center and is a quarter surface behind the normal in the rotational direction. The contact position of the scraping blade with the upper part of the roll is 30 degrees or more from the vertical direction.

Since the separator film wet manufacturing apparatus and method according to the present invention are configured as described above, the following effects can be obtained.
That is, a separator film for a lithium ion secondary battery extruded from a T die is subjected to heat treatment, cooling treatment and stretching from a roll center of a plurality of rolls through an upper roll upper part and a roll center through a lower roll lower part. Any one or more or all of the treatments are performed, and at least the oil attached to the peripheral surface of the roll is scraped off by at least an upper scraper disposed so as to be in contact with the peripheral surface of the upper portion of the roll. In the separator film wet manufacturing apparatus, the upper scraper is disposed to face the main body, a scraping blade provided in the main body and slidingly contacting the peripheral surface of the roll, and a front end of the scraping blade through a gap. And the oil receiver connected to the guide blade, and the oil scraped off by the scraping blade is the gap. The scraper for scraping off the oil adhering to the roll surface can be provided even at the upper part of the roll center by being guided to the guide blade through the guide blade, and the oil on the roll surface. Can be effectively removed. Further, since the oil is stored in the oil receiver, a clean separate film can be obtained without being applied to the separate film.
Moreover, the oil removal of the roll surface which can provide a scraper also in a roll lower surface can be removed effectively.
Further, a fixed body for supporting the main body so as to be movable in two axial directions, and first and second screws provided in two axial directions perpendicular to the main body and screwed to the movable body. The main body is moved in two axial directions with respect to the fixed body by rotation of the first and second scraping blade adjustment bolts, and the scraping blade and the peripheral surface By changing the sliding contact state, the most suitable sliding contact state for oil removal by the scraping blade can be easily obtained.
The upper scraper is disposed on a quarter surface above the center of the roll and behind the normal line in the rotational direction, and the contact position of the scraping blade with the upper part of the roll is 30 degrees or more from the vertical direction. Thus, the optimum installation position of the scraping blade with respect to the roll can be found.

It is a schematic block diagram which shows the wet manufacturing apparatus of the separator film by this invention. It is a schematic block diagram which shows the other form of FIG. It is an enlarged block diagram which shows the scraper of the upper part of FIG. It is an enlarged block diagram which shows the scraper of the lower part of FIG. It is an enlarged block diagram of the principal part of the scraper of FIG. It is an enlarged block diagram of the principal part of the scraper of FIG. It is a schematic block diagram of the apparatus of the conventional patent document 1. It is an expanded sectional block diagram of the principal part of FIG.

  The present invention provides a separator film wet manufacturing apparatus and method in which a scraper is provided on at least the upper part of a roll to remove oil on the roll, thereby preventing problems due to oil interposed between the roll and the film. The purpose is to do.

Hereinafter, preferred embodiments of a separator film wet manufacturing apparatus and method according to the present invention will be described with reference to the drawings.
In addition, the same code | symbol is attached | subjected and demonstrated about the same or equivalent part as a prior art example.
FIG. 1 shows a cooling roll type component. In FIG. 1, reference numeral 60 denotes a T die. From a discharge port 60a of the T die 60, a thermoplastic resin composition is filled with a filler or a plasticizer. A separator film 68 formed by forming a mixture of the above into a film is pushed downward, and is sandwiched between a touch roll 66 and a cooling roll 55 and is drawn out while being cooled.

  The separator film 68 drawn out by the touch roll 66 and the roll 55 is drawn out while being further cooled by the roll 56 and the roll 57, and can be wound up in a cooled state by a winding roll (not shown). Yes.

When the separator film 68 is cooled and conveyed by the touch roll 66, the roll 55, the roll 56 and the roll 57, the oil coming out of the separator film 68 adheres to the surface of each roll 66, 55, 56, 57. Therefore, an upper scraper 10 and a lower scraper 11 are provided in order to remove and collect the oil.
Each of the scrapers 10 and 11 is divided into a roll upper part 12 and a roll lower part 13 of each of the rolls 66, 55, 56, and 57, and their attachment is provided on a fixed side of a device (not shown). .

  Each upper scraper 10 is disposed at the position of the upper roll portion 12 above the roll center 14 of each roll 55, 57, and each lower scraper 11 is lower than the roll center 14 of each roll 66, 56. It is disposed at the position of the lower roll 13.

The upper scraper 10 disposed on the roll upper part 12 side and the lower scraper 11 disposed on the roll lower part 13 side have different structures.
That is, each upper scraper 10 on the roll upper part 12 side has a main body 15 whose overall shape is L-shaped, as disclosed in detail in FIGS. 1, 3, 5, and 6. It is disposed via a scraping blade 18 provided at the tip and first and second scraping blade adjusting bolts 16 and 17 disposed orthogonally to each other inside the main body 15, and is used for a separator film wet manufacturing apparatus 90. A fixed body 19 fixed to a fixed side (not shown), a holding body 20 fixedly arranged on the fixed side at the tip side of the scraping blade 18, and an oil having a cross-sectional solder shape provided on the holding body 20 A receiving blade 21, a guide blade 22 provided in the holding body 20 via a screw body 20 a and a long hole 20 b (shown in FIG. 5), and between the tip of the guide blade 22 and the tip of the scraping blade 18. The gap G is formed (shown in FIG. 5).

By adjusting the bolts 16 and 17 with respect to the fixed body 19 and moving the main body 15 in the X and Y biaxial directions with respect to the fixed body 19, the scraping blade 18 and the rolls 55 and 57 are moved. It adjusts by changing the contact state with the peripheral surface of the roll upper part 12 in so that an optimum contact state can be obtained.
Further, by loosening the screw body 20a and moving the guide blade 22 along its longitudinal direction, the size of the gap G and the pressing force on the peripheral surfaces of the guide blade 22 and the rolls 55 and 57 are adjusted. It is configured to be able to.
The installation position of the upper scraper 10 with respect to each of the rolls 55 and 57 is a position of a quarter surface above the roll center 14 and rearward in the rotational direction from the normal, and the upper part 12 of the scraping blade 18 in the roll. The contact position is most preferably 30 degrees or more from the vertical direction in order to increase the inclination of the guide blade 22 and effectively guide the oil to the oil receiver 21.

  Each lower scraper 11 is disposed on the side of the lower roll 13 of each of the rolls 66 and 56. Each upper scraper 11 is a main body having an overall L-shape as shown in FIG. 15, a fixed body 19 provided on the inner side of the main body 15 and fixed to the fixed side of the separate film wet manufacturing apparatus 90, and first and second biaxially arranged to be screwed to the fixed body 19, It comprises second scraping blade adjustment bolts 16 and 17 and an oil receiver 21 connected to the fixed body 19 and having a semicircular cross section. The scraping blade adjustment bolts 16 and 17 are screwed or screwed. By letting out, the main body 15 moves in the X direction and the Y direction with respect to the fixed body 19, and the contact state between the scraping blade 18 and the peripheral surface of the roll lower portion 13 of the rolls 66 and 56 can be adjusted.

The main body 15 moves in the X direction when the first scraping blade adjustment bolt 16 is screwed in and screwed out, and the main body 15 moves in the Y direction when the second scraping blade adjustment bolt 17 is screwed in and screwed out. can do.
Further, if the screw body 20a is loosened, the scraping blade 18 can move along the X direction using the same long hole 20b as in FIG.

FIG. 2 shows a configuration in the case of a drawing roll type with respect to the cooling roll type of FIG. 1. A pair of low speed side nip rolls 100 and a pair of high speed side nip rolls 101 are combined to form a pair of low speed side nip rolls 100, 100. The separator film 68 fed through the gap is stretched due to the speed difference when conveyed downstream between a pair of adjacent high-speed nip rolls 101, 101, and the thickness of the separator film 68 decreases. Is removed.
The oil is scraped off by the scrapers 10 and 11. The scrapers 10 and 11 are the same as those shown in FIG.

Next, oil removal in the case of the cooling roll type in FIG.
That is, in FIG. 1, the separator film 68 pushed out from the discharge port 60a of the T die 60 is sent to the rolls 56 and 57 through the touch roll 66 and the roll 55, and sent to the downstream side. The oil adhering to the peripheral surfaces of the rolls 55 and 57 is scraped off by the scraping blade 18, and a spherical oil reservoir (not shown) is formed in the gap G portion of the blade edge. The scraping blade 18 is made of an elastic body such as rubber having a length along the axial direction.

If this oil pool becomes larger than a certain level, it will try to fall down on the peripheral surfaces of the rolls 55 and 57. However, since the gap G is small, it does not drip downward and is guided to the guide blade 22 across this gap G. Then, it enters the oil receiver 21 behind the guide blade and is discharged out of the device 90 through a pipe (not shown).
In the case of the lower scrapers 11 and 12 in the rolls 66 and 56, the oil scraped off by the scraping blade 18 falls directly into the lower oil receiver 21 from the scraping blade 18 and is collected outside. The

The summary of the separator film wet manufacturing apparatus and method according to the present invention is as follows.
A separator film 68 for a lithium ion secondary battery extruded from the T-die 60 is made up of a plurality of rolls 55, 56, 57 composed of a plurality of rolls 14 from the roll center 14 to the upper roll upper part 12 and from the roll center 14 to the lower roll lower part 13. The roll 55, by the upper scraper 10 disposed so as to be in contact with the peripheral surface of the roll upper portion 12 at least while performing any one or a plurality or all of the heat treatment, cooling treatment and stretching treatment through In the separator film wet manufacturing apparatus and method for scraping at least oil adhering to the peripheral surface of 57, the upper scraper 10 is provided on the peripheral surface of the roll 55, 57 provided on the main body 15 and the main body 15. The scraping blade 18 that is in sliding contact with the guide blade 22 that is disposed to face the tip of the scraping blade 18 with a gap G therebetween. And the oil receiver 21 connected to the guide blade 22, and the oil scraped off by the scraping blade 18 is guided to the guide blade 22 through the gap G and enters the oil receiver 21. And a fixing body 19 for supporting the main body 15 so as to be movable in the biaxial direction, and a screw portion provided in a biaxial direction perpendicular to the main body 15. The first and second scraping blade adjustment bolts 16 and 17 are screwed into the fixed body 19, and the first and second scraping blade adjustment bolts 16 and 17 are rotated with respect to the fixed body 19. The main body 15 is moved in two axial directions to change the sliding contact state between the scraping blade 18 and the peripheral surface, and the upper scraper 10 is located above the roll center 14. The 1/4 plane behind the normal in the rotational direction It is disposed, the contact position between the roll top 12 of the scraper blade 18 is configured and methods from the vertical direction and 30 degrees or more.

  In the separator film wet manufacturing apparatus and method according to the present invention, the oil adhering to the upper part of each roll can be removed by the upper scraper, the oil removal of the roll peripheral surface can be improved, and the productivity of the separator film can be improved. It can be greatly improved.

DESCRIPTION OF SYMBOLS 10 Upper scraper 11 Lower scraper 12 Roll upper part 13 Roll lower part 14 Roll center 15 Main body 16,17 1st, 2nd scraping blade adjustment bolt 18 Scraping blade 19 Fixed body 20 Holding body 20a Screw body 20b Long hole 21 Oil receptacle 22 Guide blade 55 Roll for cooling 56 Roll 60 T die 66 Touch roll 68 Separator film 90 Separator film wet manufacturing apparatus 100 Low speed side nip roll 101 High speed side nip roll G Gap

Claims (6)

A separator film (68) for a lithium ion secondary battery extruded from a T-die (60) from a roll center (14) of a plurality of rolls (55, 56, 57) to an upper roll upper part (12) And any one or more or all of the heat treatment, cooling treatment and stretching treatment from the roll center (14) through the lower roll lower portion (13), and at least on the peripheral surface of the upper roll portion (12) In the wet manufacturing apparatus for the separator film, the upper scraper (10) arranged so as to come into contact scrapes at least the oil attached to the peripheral surface of the roll (55, 57).
The upper scraper (10) includes a main body (15), a scraping blade (18) provided on the main body (15) and in sliding contact with a peripheral surface of the rolls (55, 57), and the scraping blade (18). A guide blade (22) disposed opposite to the tip of the guide blade via a gap (G), and an oil receiver (21) connected to the guide blade (22), the scraping blade (18) The separator film wet manufacturing apparatus according to claim 1, wherein the oil scraped in step (b) is guided to the guide blade (22) through the gap (G) and enters the oil receiver (21). A fixed body (19) for supporting the main body (15) so as to be movable in two axial directions, and a screw portion provided in two axial directions orthogonal to the main body (15). And the first and second scraping blade adjustment bolts (16, 17) screwed together,
The main body (15) is moved biaxially relative to the fixed body (19) by the rotation of the first and second scraping blade adjustment bolts (16, 17), and the scraping blade (18) and the The wet manufacturing apparatus for a separator film according to claim 1, wherein the sliding contact state with the peripheral surface is changed.   The upper scraper (10) is disposed on a quarter of the surface above the roll center (14) and rearward in the rotational direction from the normal, and the scraper blade (18) is connected to the upper roll portion (12). 3. The separator film wet manufacturing apparatus according to claim 1, wherein the contact position is 30 degrees or more from the vertical direction. A separator film (68) for a lithium ion secondary battery extruded from a T-die (60) from a roll center (14) of a plurality of rolls (55, 56, 57) to an upper roll upper part (12) And any one or more or all of the heat treatment, cooling treatment and stretching treatment from the roll center (14) through the lower roll lower portion (13), and at least on the peripheral surface of the upper roll portion (12) In the wet manufacturing method of the separator film, the upper scraper (10) disposed so as to come into contact with the peripheral surface of the roll (55, 57) is scraped off.
The upper scraper (10) includes a main body (15), a scraping blade (18) provided on the main body (15) and in sliding contact with a peripheral surface of the rolls (55, 57), and the scraping blade (18). A guide blade (22) disposed opposite to the tip of the guide blade via a gap (G), and an oil receiver (21) connected to the guide blade (22), the scraping blade (18) The separator film wet manufacturing method according to claim 1, wherein the oil scraped in step (b) is guided to the guide blade (22) through the gap (G) and enters the oil receiver (21). A fixed body (19) for supporting the main body (15) so as to be movable in two axial directions, and a screw portion provided in two axial directions orthogonal to the main body (15). And the first and second scraping blade adjustment bolts (16, 17) screwed together,
The main body (15) is moved biaxially relative to the fixed body (19) by the rotation of the first and second scraping blade adjustment bolts (16, 17), and the scraping blade (18) and the The wet manufacturing method for a separator film according to claim 4, wherein the sliding contact state with the peripheral surface is changed.   The upper scraper (10) is disposed on a quarter of the surface above the roll center (14) and rearward in the rotational direction from the normal, and the scraper blade (18) is connected to the upper roll portion (12). 6. The separator film wet manufacturing method according to claim 4, wherein the contact position is 30 degrees or more from the vertical direction.

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