WO2016132807A1 - 微多孔プラスチックフィルムの製造方法 - Google Patents
微多孔プラスチックフィルムの製造方法 Download PDFInfo
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- WO2016132807A1 WO2016132807A1 PCT/JP2016/051777 JP2016051777W WO2016132807A1 WO 2016132807 A1 WO2016132807 A1 WO 2016132807A1 JP 2016051777 W JP2016051777 W JP 2016051777W WO 2016132807 A1 WO2016132807 A1 WO 2016132807A1
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- sheet
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- diluent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/885—External treatment, e.g. by using air rings for cooling tubular films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
- B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/18—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets by squeezing between surfaces, e.g. rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/20—Edge clamps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/26—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/443—Particulate material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a method for producing a microporous plastic film.
- Microporous plastic films are widely used as separators for electrochemical elements such as separation membranes used for separation and selective permeation of substances, alkaline secondary batteries, lithium secondary batteries, fuel cells and capacitors. In particular, it is suitably used as a lithium ion battery separator.
- Patent Document 1 As a method for producing a microporous film using a plastic mainly made of polyolefin as a raw material, there are wet methods as shown in Patent Document 1 and Patent Document 2, for example.
- a diluent such as liquid paraffin is added to the resin, kneaded and dispersed, discharged onto a cooling drum from the die, and formed into a gel sheet by cooling and solidifying.
- the film is stretched uniaxially or biaxially using the tenter method, and then the diluent is extracted to obtain a film having micropores.
- the longitudinal stretch ratio can be freely changed by changing the roller speed. Since it can be stretched, the mechanical properties of the microporous plastic film can be improved.
- the diluent should bleed out from the gel sheet surface with pressure due to heat and tension, and this diluent should be transported and stretched while interposing at the boundary between the film and the roller.
- Patent Document 1 In order to stretch this gel sheet, the sheet that has been sufficiently cooled to below the crystallization end temperature of the resin is heated and stretched to the extent that it does not exceed the melting point again (for example, above the crystal dispersion temperature as in Patent Document 2). I do.
- Patent Document 1 it is possible to avoid the slip by applying a tension exceeding the longitudinal stretching tension between the longitudinal stretching machine and the lateral stretching machine (tenter), and particularly when a tension of 20% or more of the stretching tension is applied. There is good. According to the knowledge of the inventor of the present application, when a tension exceeding the stretching tension is applied, the sheet is pulled downstream on the side of the transverse stretching machine, conversely promoting slipping, and slipping cannot be prevented.
- An object of the present invention is to provide a method for producing a microporous plastic film having excellent physical properties and mechanical properties by stretching while preventing slippage under high productivity at high speed.
- the present invention provides a method in which a diluent and a polyolefin resin are kneaded in an extruder, the polyolefin resin kneaded with the diluent is discharged from the die into a sheet shape, and the sheet discharged from the die is a drum. After cooling and solidifying above, the solidified sheet is heated again and stretched in the sheet conveying direction by a plurality of rollers.
- the present invention provides a method in which a diluent and a polyolefin resin are kneaded by an extruder, the resin kneaded with the diluent is discharged from the die into a sheet shape, and the sheet discharged from the die is a drum. After cooling and solidifying above, the solidified sheet is heated again and stretched in the sheet conveying direction by a plurality of rollers.
- both ends of the sheet are held by clips
- the motor is located upstream of the most downstream roller in the transport direction among the plurality of rollers.
- the number of combinations of the drive roller and the nip roller is reduced by narrowing the sheet with the drive roller driven by the roller and the nip roller coated with rubber on the surface.
- the material of the driving roller surface is metal or ceramic and the surface roughness is less than 1S.
- nip means that a sheet is narrowed with a roller.
- the “nip roller” refers to a roller that is pressed by another roller that is opposed to the other roller by moving to narrow the sheet, out of the two rollers used for the narrow pressure.
- a microporous plastic film having excellent physical properties and mechanical properties can be obtained with high productivity by preventing slippage even in the wet roller stretching method.
- FIG. 1 is a schematic side view of a manufacturing process of a microporous plastic film according to an embodiment of the present invention.
- a polyolefin solution in which a polyolefin resin is mixed with a diluent and heated and melted is prepared.
- the diluent determines the microporous structure of the microporous plastic film, and contributes to improvement of stretchability when the film is stretched (for example, reduction of spots at a stretch ratio for strength development).
- the diluent is not particularly limited as long as it is a substance that can be mixed or dissolved in the polyolefin resin. In the melt-kneaded state, it is miscible with the polyolefin, but a solid solvent may be mixed with the diluent at room temperature. Examples of such a solid diluent include stearyl alcohol, seryl alcohol, and paraffin wax.
- the diluent is preferably a liquid at room temperature in order to prevent unevenness due to stretching and to be applied later.
- Liquid diluents include aliphatics such as nonane, decane, decalin, paraxylene, undecane, dodecane, liquid paraffin; cycloaliphatic or aromatic hydrocarbons; and mineral oils with boiling points in the range of these compounds Distillates; and liquid phthalates such as dibutyl phthalate and dioctyl phthalate at room temperature.
- a non-volatile diluent such as liquid paraffin is more preferable.
- the viscosity of the liquid diluent is preferably 20 to 200 cSt at 40 ° C.
- the blending ratio of the polyolefin resin and the diluent is preferably 10 to 50% by mass from the viewpoint of improving the extrudate moldability by setting the total of the polyolefin resin and the diluent to 100% by mass.
- the extruder 21 with a screw like FIG. 1 etc. can be used.
- the preferable range of the temperature of the polyolefin resin solution in the extruder varies depending on the resin.
- the polyethylene composition has a temperature of 140 to 250 ° C.
- polypropylene includes 190 to 270 ° C.
- the temperature is indirectly grasped by installing a thermometer in the extruder or in the cylinder part, and the heater temperature, the rotation speed, and the discharge amount of the cylinder part are appropriately adjusted so as to reach the target temperature.
- the polyolefin resin solution melt-kneaded by the extruder 21 is discharged into a sheet from the slit portion of the base 23 while being measured by the gear pump 22 as necessary.
- the discharged gel sheet 12 contacts the first cooling drum 31 and solidifies.
- the gel-like sheet 12 forms a crystal structure in the polyolefin portion, and this structure becomes a pillar portion that supports the holes of the microporous plastic film 11 later.
- the gel sheet 12 contains the diluent kneaded in the extruder 21 and is in a gel state. A part of the diluent bleeds out from the surface of the sheet by cooling the gel-like sheet 12 so that the surface is conveyed on the first cooling drum 31 in a state where the surface is wet by the diluent.
- the thickness of the gel-like sheet 12 is preferably adjusted by adjusting the speed of the cooling drum with respect to the flow rate from the mouthpiece slit portion corresponding to the discharge amount.
- the temperature of the first cooling drum 31 affects the crystal structure of the gel sheet 12, and is preferably 15 to 40 ° C. This is because the final cooling temperature of the gel sheet 12 is preferably set to be equal to or lower than the crystallization end temperature. Since the higher-order structure is fine, the molecular orientation easily proceeds in the subsequent stretching. Compensate the cooling time by appropriately increasing the diameter of the first cooling drum 31, adding another second cooling drum 32 in addition to the first cooling drum 31, or adding more cooling drums. You can also. At this time, in order to densify and homogenize the crystal structure in the gel-like sheet 12, it is preferable to determine the conveying speed, the drum temperature, the drum size, and the number of drums in consideration of the cooling speed.
- the temperature of the first cooling drum 31 may be set as low as 20 ° C. because the heat conduction time is insufficient. However, since it is easy for condensation to occur when the temperature is lower than 25 ° C., it is preferable to perform air conditioning so as to reduce the humidity.
- the shape of the first cooling drum 31 may be a roller shape or a belt shape.
- the material of the surface of the first cooling drum 31 is preferably excellent in shape stability so that the roller speed is constant and easy to obtain processing accuracy. For example, metals, ceramics, fiber composite materials and the like are preferable. In particular, for the surface, a metal excellent in heat conduction to the film is preferable.
- non-adhesive coating or rubber coating may be performed to such an extent that thermal conduction is not hindered. Since the surfaces of the sheet and the roller are in a wet state due to the bleeding out of the diluent, a metal or metal plating excellent in scratch resistance and the above heat conduction is preferable.
- the roller internal structure of the cooling drums 31 and 32 is preferably configured so as to incorporate a heat pump and various cooling devices that have been conventionally used, in addition to providing a refrigerant flow path in order to control the surface temperature.
- the rollers are rotationally driven at a speed set by a rotational driving means such as a motor, and a transmission mechanism is appropriately provided between the rollers so that draw tension and relaxation can be applied according to the expansion and contraction of the sheet.
- a motor may be individually arranged on each roller, and the speed may be adjusted with accuracy by an inverter or a servo to provide the same function as the speed change mechanism.
- the gel-like sheet 12 is in contact with the first cooling drum 31 that is the cooling drum that the upper surface side is discharged from the base 23 and first contacts, and is rapidly cooled by the refrigerant at the above temperature.
- the surface opposite to the surface in contact with the first first cooling drum 31 is gradually cooled by air in FIG.
- the cooling rate can be increased also for the opposite surface by cooling with forced convection by an air nozzle or an air chamber. it can. This is particularly suitable when the conveyance speed is high, or when the thickness of the gel-like sheet is large and the heat conduction to the first cooling drum 31 is not sufficient.
- FIG. 3 it is possible to improve the cooling capacity of the opposite surface by disposing a refrigerant nip roller 33 that allows the refrigerant to flow inside on the side opposite to the cooling drum 31.
- the wet gel sheet 12 is pressed against the first cooling drum 31 by using contact means such as a nip roller, a jet nozzle, a suction chamber, and electrostatic application as appropriate so that the cooling efficiency does not drop or meander due to lubrication. May be.
- contact means such as a nip roller, a jet nozzle, a suction chamber, and electrostatic application as appropriate so that the cooling efficiency does not drop or meander due to lubrication. May be.
- These close contact means are preferable because they improve the running performance, increase the cooling efficiency of the gel-like sheet 12, and facilitate the setting of the cooling rate and the final cooling temperature.
- the surface of the nip roller is a flexible rubber-like elastic body so that the gel-like sheet 12 can be uniformly pressed against uneven thickness of the gel-like sheet 12, deflection of the roller, and slight unevenness of the surface.
- the flexible rubber-like elastic body is not particularly limited, but a general vulcanized rubber such as nitrile butyl rubber (NBR), chloroprene rubber (CR), ethylene propylene rubber (EPDM), hyperon rubber (CSM) and the like are suitable. is there.
- the gel-like sheet 12 and the conveying roller temperature are high, specifically, when the temperature is 80 ° C. or higher, the EPDM and CSM are particularly preferable. At higher temperatures, silicone rubber and fluororubber are suitable in addition to the vulcanized rubber. In this case, selecting a rubber that is less swelled by the diluent can prevent the roller shape from becoming distorted over time.
- the both ends of the uniaxially stretched sheet 13 are conventionally used as appropriate clips, etc.
- the sheet is stretched in the width direction of the sheet (direction perpendicular to the conveying direction) while conveying the sheet in the advancing direction while heating and keeping warm in the oven 5.
- stretching is performed between the upstream stretching roller 421 and the downstream stretching roller 422 in the longitudinal stretching step 4.
- the sheet conveying direction stretching (hereinafter referred to as longitudinal stretching) step is composed of a roller having a surface of metal or the like and a temperature control mechanism such as a heater inside the same as the cooling drum, and the driving is the same. is there.
- pass although not shown in FIG. 1, you may arrange
- the idler roller since the coefficient of friction between the wet film and the roller is small, it is preferable that the idler roller be provided with a bearing or reduce the inertia loss so that the rotational force is small. It is also preferred not to.
- the internal structure of the temperature rising roller group 41 and the stretching roller 42 is also preferably heated by providing a flow path of a heat medium such as steam or pressurized hot water inside the roller, similarly to the cooling drum 31.
- a heat medium such as steam or pressurized hot water inside the roller
- the roller is supported by a bearing so that it can be rotated, and in order to supply a heat medium, a rotatable joint (generally referred to as a rotary joint) for supplying a heat medium that does not interfere with the rotation of the roller. It may be connected to the shaft end and connected to the heat medium supply pipe.
- the stretching ratio varies depending on the thickness of the gel sheet, but the stretching in the sheet conveying direction is preferably performed at 5 to 12 times.
- the area magnification is preferably 30 times or more, more preferably 40 times or more, and still more preferably 60 times or more.
- the stretching temperature is preferably below the melting point of the polyolefin resin, and more preferably in the range of (polyolefin resin crystal dispersion temperature Tcd) to (polyolefin resin melting point).
- Tcd polyolefin resin crystal dispersion temperature
- the temperature is from 80 to 130 ° C, more preferably from 100 to 125 ° C. After stretching, cooling is performed below these temperatures.
- the uniaxially stretched sheet 13 or the biaxially stretched sheet 14 thus obtained is finely washed by removing and washing the diluent by a conventional technique, for example, the method described in International Publication No. 2008-016174.
- a porous plastic film 11 is obtained.
- the microporous plastic film 11 When the microporous plastic film 11 is obtained, it may be re-heated and re-stretched in the dry stretching step 7 after the washing step 6.
- the redrawing step 7 may be either a roller type or a tenter type.
- physical properties can be adjusted and residual strain can be removed by performing heat treatment in the same step.
- the surface of the microporous plastic film 11 may be subjected to surface treatment such as corona discharge or functional coating such as heat-resistant particles.
- the diluent contained in the gel-like sheet 12 bleeds out by being cooled by the cooling drums 31 and 32. Further, the diluent bleeds out even under the pressure due to the conveying tension here. For the same reason, after discharging from the base 23, the surfaces of the gel-like sheet 12 and the stretched films 13 and 14 are wet with the diluent until the diluent is removed and washed in the washing step 6.
- the gel-like sheet 12 is heated to the stretching temperature, for example, by the preheating roller group 41 in the longitudinal stretching step 4, and the bleeding out of the diluent is accelerated by the temperature increase.
- the bleed-out particularly increases from the first cooling drum 31 to the upstream of the longitudinal stretching step 4, that is, from the temperature raising roller group 41.
- a pan (not shown) may be installed to collect and discard or reuse it.
- the temperature raising roller group 41 and the stretching roller group 42 are common in that the temperature of the gel sheet 12 is raised and heated and the roller rotation speed can be varied, but the stretching roller 42 is a gel sheet. Since this is a roller for substantially stretching 12, it is a roller for providing a peripheral speed difference for causing the gel-like sheet 12 to be permanently deformed in the traveling direction. More specifically, a roller that gives a circumferential speed difference of 3% or more with respect to an upstream roller is defined as a roller that substantially extends, that is, a stretching roller group 42.
- a gripping force (frictional force) is required between the roller and the gel-like sheet 12, and particularly high tension is generated by stretching in the stretching portion 42. Therefore, to obtain the necessary draw ratio, a high gripping force that is balanced with the draw tension is required.
- the diluent bleed out as described above is interposed between the roller and the gel-like sheet 12 and becomes in a lubricated state, which causes a reduction in gripping force necessary for conveyance and stretching.
- the downstream stretching tension is mainly the end of the uniaxially stretched sheet 13 in the lateral stretching step 5.
- the clip holding the part bears and balances.
- the cooling roller group 43 may bear stretching tension, it does not have sufficient gripping force to prevent slipping. Therefore, the cooling roller group 43 preferably does not bear the same tension as the lateral stretching step 5, the downstream stretching roller 422, and the uniaxially stretched sheet 13. It should be fast.
- the most downstream stretching roller, in FIG. 1, the stretching roller 422 be a cooling roller.
- the cooling roller group 43 cools the stretched sheet before sending it to the transverse stretching step 5 and conveys it to the tenter oven 5, thereby facilitating the process paper passing operation of the uniaxially stretched sheet 13 and the transverse stretching.
- a highly oriented and high strength microporous plastic film can be obtained by the effect of solidifying the crystal structure formed by longitudinal stretching.
- the stretching roller 422 is also a cooling roller, and cooling is performed simultaneously with the completion of stretching, thereby preventing unnecessary dimensional deformation, change in tension, and the like.
- stretching roller 422 makes a tenter clip mainly bear downstream extending
- the preheating roller group 41 should bear the stretching tension as appropriate, and the resultant force must be balanced with the stretching tension. If the upstream stretching tension is not balanced by these roller gripping forces alone, there is no non-slip speed regulating portion like the tenter clip on the downstream side, so that there is no result between the base 23 and the first cooling drum 31. This causes problems such as tension and thickness fluctuation in the molten gel sheet 12 and must be avoided.
- a roller on the most downstream side in the transport direction that is, upstream of the stretching roller 422 in FIG.
- the frictional force of each driving roller generated by the nip pressure of the nip roller is Coulomb. Is the product of the coefficient of friction and the pressure, ⁇ i ⁇ Pi.
- the total gripping force generated by the frictional force may be larger than the stretching tension T [N]. Since the frictional force here is only generated as a reaction force against the tension, the gel-like sheet 12 is not pulled upstream even if it is larger than the tension.
- the stretching tension T is heated to a stretching temperature that assumes the pre-stretching gel-like sheet 12 formed in advance and cooled, and a stress-strain diagram is collected with a tensile tester capable of measuring displacement and load.
- the sample may be collected with a cross-sectional area, or actually measured using a tensiometer in the process as shown in FIG.
- the tensiometer is almost the same between the stretching roller group 42 and the transverse stretching step 5, and may be installed anywhere between them.
- the nip pressure Pi can be originally adjusted for each driving roller, but it is conventionally preferable that the nip pressure is about 300 to 2000 [N / m] per unit width so that the nip pressure Pi is not pushed too much by a pair of rollers to meander. More known.
- the coefficient of friction ⁇ i between each driving roller and the gel sheet 12 can also take different values for each sheet and the driving roller.
- the gel-like sheet 12 before stretching which has been formed and cooled in advance, is collected and measured between the driving roller or a plate made of the same material as the driving roller.
- a conventional method shown in Formula 2 of FIG. 5 of International Publication 2012/133097 Pamphlet may be used as a method for measuring the friction coefficient.
- the measurement of the coefficient of friction of the present invention is carried out by stopping a driving roller at a room temperature of 25 ° C.
- the surface is hard chrome plating with a maximum height of 0.4 ⁇ m as described above
- the friction coefficient ⁇ is about 0.05 to 0.4. It is.
- the stretching tension T is 2000 N / m
- the nip roller pressure is 1000 N / m
- ⁇ 0.2
- the number N of nip rollers is 10 or more.
- N 5 to 25 sets, and more preferably 10 to 20 sets.
- a gripping force is expressed by a frictional force from the temperature raising roller to the upstream stretching roller, and the gripping force on the upstream side of the stretching tension is gradually shared. It is possible to prevent problems such as thickness unevenness due to stretching tension on the gel sheet 12 in a molten state between the drums 31.
- the surface of the nip roller is made of a rubber-like elastic body that is flexible so that the gel-like sheet 12 can be uniformly pressed against uneven thickness of the gel-like sheet 12, deflection of the roller, and slight irregularities on the surface.
- the longitudinal stretching step 4 involves conveyance at a temperature equal to or higher than the thermal diffusion temperature, rubbers having high heat resistance such as EPDM and hyperon rubber are preferable, and silicone rubber and fluorine rubber are more preferable. In this case as well, it is preferable to select a rubber that is less swelled by the diluent because it can prevent the roller shape from becoming distorted with time.
- the thickness unevenness quality and appearance quality in the longitudinal drawing can be further improved by niping substantially tangentially. It can improve and prevent slipping and meandering.
- a diluent or air accompanies the gel sheet 12 with a certain thickness between the stretching roller group 42 or the temperature raising roller group 41 and the nip roller, and then the nip This is because a bank is formed to be nipped by the roller 44.
- the roller surface roughness is preferably about 0.2 to 40 ⁇ m at the maximum height, about 0.2 to 0.8 ⁇ m for a mirror surface, and about 20 to 40 ⁇ m for a sufficiently rough surface. More preferred. Since this roller is wet with a diluent, in the case of a mirror surface, the friction coefficient is reduced by lubrication. The rough surface has an effect of reducing or preventing the amount of lubrication by discharging the diluent from the unevenness, and increases the friction coefficient.
- Mirror surface and rough surface may be combined if necessary, but basically the mirror surface improves maintenance and speed control accuracy such as cleaning, and there is a certain amount of lubricant lubrication on the mirror surface. It is preferable because it can prevent the appearance unevenness of the sheet.
- the surface of the driving roller is preferably a mirror surface, and the maximum height is 1 S or less. That is, it is more preferably 1 ⁇ m or less, and still more preferably 0.2 to 0.8 ⁇ m.
- the material of the nip roller surface is metal or ceramic.
- a polyethylene (PE) composition comprising 40% by mass of ultrahigh molecular weight polyethylene having a weight average molecular weight (Mw) of 2.5 ⁇ 10 6 and 60% by mass of high density polyethylene (HDPE) having an Mw of 2.8 ⁇ 10 5
- Mw weight average molecular weight
- HDPE high density polyethylene
- the obtained mixture is fed into a twin screw extruder 21 at a flow rate of 97 kg / hr using a film forming method as shown in FIG. 1, and liquid paraffin is further used as a diluent at a flow rate of 291 kg / hr. And mixed at a temperature of 210 ° C.
- the obtained polyethylene solution was supplied to the base 23 while being measured with a gear pump, and the polyethylene solution having a temperature of 210 ° C. was discharged onto the first cooling drum 31 whose temperature was controlled to 35 ° C. to form the gel sheet 12. .
- the first cooling drum 31 was rotationally driven at a speed of 10 m / min.
- the thickness of the obtained gel-like sheet 12 was 100 mm square before being introduced into the longitudinal stretching step 4 and measured with a contact-type thickness meter. As a result, the average of 10 times was 1.5 mm. A bleed-out diluent adheres to the surface, and the thickness measurement has a variation of ⁇ 0.1 mm at the maximum.
- the obtained gel-like sheet 12 was heated with the first metal water-feeding roller of the heating roller group 41 and the drawing roller group 42 so that the temperature of the sheet surface was 110 ° C.
- the motor rotation number directly connected to the rollers is increased so as to become faster at the downstream with a speed difference of 1% according to the thermal expansion of the sheet. Controlled.
- the stretching roller group 42 is composed of two rollers as shown in FIG. 1, and a nip roller 44 whose surface is covered with rubber is arranged on each roller, and longitudinal stretching is performed by a speed difference between the rollers.
- the speed of the first cooling drum 31 is 10 m / min, the speed ratio between the temperature raising roller group 41 and the upstream stretching roller 421 is 1% each, the speed of the upstream stretching roller 421 is 10.4 m / min, and the stretching roller 422.
- the stretched film 13 was cooled by four rollers of the cooling unit 43 including the last roller 422 of the stretching roller group 42, and the water passing roller temperature was adjusted so that the sheet temperature became 50 ° C.
- the last stretching roller, the cooling roller group 43, and the clips in the transverse stretching process were set to the same speed with a speed difference of 0.
- the surfaces of all the rollers in the longitudinal stretching step 4 were coated with hard chrome plating on the surface of a steel roller, and the surface roughness was 10 ⁇ m (10S) at the maximum height.
- Methylene chloride obtained by holding both ends of the obtained stretched film 13 with clips, transversely stretching in the oven 5 at a magnification of 6 times, at a temperature of 115 ° C., and cooled to 30 ° C., and adjusting the temperature to 25 ° C.
- liquid paraffin was removed.
- the washed film is dried in a drying furnace adjusted to 60 ° C., and is re-stretched in the re-stretching step 7 so that the area magnification is 1.2 times in the longitudinal direction ⁇ lateral direction. Heat treatment was performed for 2 seconds to obtain a microporous plastic film 11 having a thickness of 16 ⁇ m and a width of 2000 mm.
- Example 2 In the configuration shown in FIG. 1, the surface of all rollers in the longitudinal stretching step 4 from the first cooling drum 31 is coated with hard chrome plating on the surface of the steel roller, and the surface roughness is 0.4 ⁇ m at the maximum height. (0.8S) was used. Other conditions were the same as in Example 1.
- [Meandering amount in the longitudinal stretching process] The amount of meandering in the longitudinal stretching step 4 was evaluated according to the following criteria.
- the Gurley air resistance was measured according to JIS P8117 using an Oken type air resistance meter (EGO-1T, manufactured by Asahi Seiko Co., Ltd.).
- EGO-1T Oken type air resistance meter
- the maximum load was measured when a microporous film having a film thickness T1 ( ⁇ m) was pierced at a speed of 2 mm / sec with a needle having a spherical surface (curvature radius R: 0.5 mm) and a diameter of 1 mm.
- the appearance quality of the biaxially stretched sheet 14 was evaluated.
- a 150 lumen LED light source was used as an inspection light source for appearance confirmation.
- the upper surface during traveling of the biaxially stretched sheet 14 was used as the appearance quality determination surface.
- the LED light source was irradiated at a distance of 1 m from the film in a direction perpendicular to the sheet running direction and at an angle of 0 degree from the perpendicular direction, and the determination was as follows.
- X impossible: The appearance of the biaxially stretched sheet 14 running at the exit of the lateral stretching step 5 was visually observed, and brightness and darkness could be confirmed.
- the number of nip roller sets is set so as to obtain a frictional force and gripping force exceeding the stretching tension, so that slip and meander do not occur and are continuously stable.
- the microporous plastic film 11 was manufactured.
- both sliding and meandering were unacceptable.
- the target physical properties and mechanical properties of the microporous plastic film could not be obtained.
- Example 1 since the roughness of the roller exceeds 1S, the amount of lubricant in the diluent is less than that in Example 2, and dirt is easily deposited on the rough surface, so that the appearance quality is inferior. .
- the running performance was stable as described above.
- Comparative Example 1 since the roller roughness exceeds 1S, the lubricating amount of the diluent is small and the meandering is small compared to Comparative Example 2. However, the meandering cannot be completely prevented because the gripping force in the running direction is insufficient. .
- a microporous plastic film excellent in strength and physical properties while maintaining running stability under the necessary stretching conditions when performing stretching necessary to obtain various properties of the microporous film. Can be obtained.
- the present invention is not particularly limited, but can be used for microporous plastic films used for separators of electrochemical reactors such as secondary batteries, fuel cells, capacitors, etc., and functions such as filtration membranes, printed membranes and various clothing materials It can be applied to sex web.
- Microporous plastic film 12 Gel-like sheet (film) 13 Uniaxially stretched sheet (film) 14 Biaxially stretched sheet (film) 15 Microporous Plastic Film Roll 21 Extruder 22 Gear Pump 23 Base 31 First Cooling Drum 32 Second Cooling Drum 33 Refrigerant Nip Roller 4 Longitudinal Stretching Step 41 Heating Roller Group 42 Stretching Roller Group 421 Upstream Stretching Roller 422 Downstream Stretching roller- 43 Cooling roller group 44 Nip roller 5 Transverse stretching process 6 Cleaning / drying process 61 Cleaning solvent 7 Re-stretching heat treatment process 8 Winding process
Abstract
Description
N>T/(μ・P)
T[N]:シートの搬送方向に延伸するのに要する延伸張力
μ:駆動ローラーとシートとの間の摩擦係数
P[N]:駆動ローラーとニップローラーとの間のニップ圧力。
μ1・P1+μ2・P2+・・・・・+μN・PN=Σμi・Pi > T
iは各駆動ローラーのナンバリングであり、把持に必要な駆動ローラーの本数をNとすると、i=1~Nということになる。上記不等式を満たす限り、上流側は延伸張力と釣り合うだけの摩擦反力が得られ、下流側はテンタークリップとの摩擦反力と釣り合い、縦延伸工程4で滑りがなく、蛇行や延伸不足などのトラブルがなくなる。
μ1・P1+μ2・P2+・・・・・+μN・PN=Σμi・Pi
=P・Σμi > T
となる。
P・Σμi= P・μ・N > T
となるから、ニップローラー本数、すなわち駆動ローラーとニップローラーの組み合わせの組数Nが、
N>T/(μ・P)
となるようにすれば、延伸張力と釣り合うべき上流側把持力を確保でき、希釈剤の潤滑のもと、縦延伸工程4での滑りや蛇行を防止することができる。
N>4000/(0.4×2000)=5組
とする。
質量平均分子量(Mw)が2.5×106の超高分子量ポリエチレンを40質量%、Mwが2.8×105の高密度ポリエチレン(HDPE)60質量%とからなるポリエチレン(PE)組成物100質量部に、テトラキス[メチレン-3-(3,5-ジターシャリーブチル-4-ヒドロキシフェニル)-プロピオネート]メタン0.375質量部をドライブレンドし、混合物を得た。
図1のような構成で、第1冷却ドラム31から、縦延伸工程4の全ローラーの表面は、鋼製ローラーの表面に硬質クロムメッキを皮膜し、表面粗さが最大高さで0.4μm(0.8S)のものを使用した。その他の条件は実施例1と同様とした。
図4のような構成で、延伸ローラー群42上にのみニップローラーを配置し、延伸ローラー群42で縦延伸を行った。その他の条件は、実施例1と同じとした。
図4のような構成で、延伸ローラー群42上にのみニップローラーを配置し、延伸ローラー群42で縦延伸を行った。その他の条件は、実施例2と同じとした。
シートおよびローラーの速度は、非接触式ドップラー速度計(アクト電子株式会社製、モデル1522)を用いて、設置精度込みで1%の精度で計測した。すべての実施例と比較例について延伸前のフィルム11の外観品位を以下の基準で評価した。
×(不可):ローラーとシートの速度差が、ローラー回転速度に対して10%以上
△(可):ローラーとシートの速度差が、ローラー回転速度に対して5%以上10%未満
○(良好):ローラーとシートの速度差が、ローラー回転速度に対して5%未満。
縦延伸工程4における蛇行量を以下の基準で評価した。
×(不良):蛇行量が10mm以上。
△(可):蛇行量が5mm以上10mm未満。
○(良好):蛇行量が5mm未満。
ガーレ透気抵抗度は、王研式透気抵抗度計(旭精工株式会社製、EGO-1T)を使用して、JIS P8117に準拠して測定した。突刺強度は、先端が球面(曲率半径R:0.5mm)の直径1mmの針で、膜厚T1(μm)の微多孔膜を2mm/秒の速度で突刺したときの最大荷重を測定した。最大荷重の測定値Laを、式:Lb=(La×16)/T1により、膜厚を16μmとしたときの最大荷重Lbに換算し、突刺強度(N/16μm)とした。
○(良好):ガーレ透気抵抗度が250sec±20sec及び突刺強度6N以上。
×(不可):上記範囲外。
二軸延伸シート14の外観品位を評価した。外観確認の検査光源としては、150ルーメンのLED光源を利用した。二軸延伸シート14の走行中に上部となる面を外観品位の判定面とした。LED光源をシート走行方向と垂直な方向にフィルムからの距離1m、上記垂直な方向から角度0度で照射し、判定は以下の基準のとおりとした。
×(不可):横延伸工程5の出口で走行する二軸延伸シート14の外観を目視し、明暗が確認できた。
△(可):走行する二軸延伸シート14では明暗が確認できなかったが、横延伸工程5を排出された二軸延伸シート14を切断して静止状態で明暗が確認できた。
○(良好):静止状態の二軸延伸シート14でも明暗が確認できなかった。
12 ゲル状シート(フィルム)
13 一軸延伸シート(フィルム)
14 二軸延伸シート(フィルム)
15 微多孔プラスチックフィルムロール
21 押出機
22 ギアポンプ
23 口金
31 第1冷却ドラム
32 第2冷却ドラム
33 通冷媒ニップローラー
4 縦延伸工程
41 昇温ローラー群
42 延伸ローラー群
421 上流側延伸ローラー
422 下流側延伸ローラ―
43 冷却ローラー群
44 ニップローラー
5 横延伸工程
6 洗浄・乾燥工程
61 洗浄溶剤
7 再延伸熱処理工程
8 巻取工程
Claims (6)
- 希釈剤とポリオレフィン樹脂を押出機にて混練し、前記希釈剤が混練された樹脂を口金からシート状に吐出し、前記口金から吐出されたシートをドラム上で冷却して固化した後、前記固化したシートを再び加熱して、複数のローラーによりシートの搬送方向に延伸し、前記シートの搬送方向に延伸したシートを冷却した後にシート両端をクリップにて把持してテンターに導入し、その後希釈剤を洗浄する1軸または2軸延伸微多孔プラスチックフィルムの製造方法において、
前記複数のローラーのうちの前記搬送方向最下流のローラーよりも上流側にあり、モーターにより駆動される駆動ローラーと、表面にゴムを被覆したニップローラーとで前記シートを狭圧し、前記駆動ローラーと前記ニップローラーの組合せの組数N[組]が下記式を満たすことを特徴とする、微多孔プラスチックフィルムの製造方法。
N>T/(μ・P)
T[N]:シートの搬送方向に延伸するのに要する延伸張力
μ:駆動ローラーとシートとの間の摩擦係数
P[N]:駆動ローラーとニップローラーとの間のニップ圧力 - 希釈剤とポリオレフィン樹脂を押出機にて混練し、前記希釈剤が混練された樹脂を口金からシート状に吐出し、前記口金から吐出されたシートをドラム上で冷却して固化した後、前記固化したシートを再び加熱して、複数のローラーによりシートの搬送方向に延伸し、前記シートの搬送方向に延伸したシートを冷却した後にシート両端をクリップにて把持してテンターに導入し、その後希釈剤を洗浄することで1軸または2軸延伸微多孔プラスチックフィルムを得る製造方法において、
前記複数のローラーのうちの前記搬送方向最下流のローラーよりも上流側にあり、モーターにより駆動される駆動ローラーと、表面にゴムを被覆したニップローラーとで前記シートを狭圧し、前記駆動ローラーと前記ニップローラーの組合せの組数が5[組]以上である微多孔プラスチックフィルムの製造方法。 - 前記駆動ローラー表面の材質が金属またはセラミックであって、表面粗さが1S未満である、請求項1または2に記載のの微多孔プラスチックフィルムの製造方法。
- 請求項1~3のいずれか一項に記載の微多孔プラスチックフィルムの製造方法で製造した微多孔プラスチックフィルム。
- 請求項4に記載の微多孔プラスチックフィルムを用いた電池用セパレータ。
- 請求項5に記載の電池用セパレータを用いた電池。
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- 2016-01-22 US US15/551,543 patent/US20180036933A1/en not_active Abandoned
- 2016-01-22 CN CN201680011193.8A patent/CN107428059B/zh active Active
- 2016-01-22 HU HUE16752196A patent/HUE052138T2/hu unknown
- 2016-01-22 WO PCT/JP2016/051777 patent/WO2016132807A1/ja active Application Filing
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KR101968861B1 (ko) * | 2017-03-03 | 2019-04-12 | 스미또모 가가꾸 가부시키가이샤 | 반송 장치 및 필름의 제조 방법 |
US20180250865A1 (en) * | 2017-03-03 | 2018-09-06 | Sumitomo Chemical Company, Limited | Film producing apparatus and method of producing film |
KR20180101240A (ko) * | 2017-03-03 | 2018-09-12 | 스미또모 가가꾸 가부시키가이샤 | 반송 장치 및 필름의 제조 방법 |
KR20180101244A (ko) * | 2017-03-03 | 2018-09-12 | 스미또모 가가꾸 가부시키가이샤 | 필름 제조 장치 및 필름 제조 방법 |
KR20180101246A (ko) * | 2017-03-03 | 2018-09-12 | 스미또모 가가꾸 가부시키가이샤 | 필름 제조 방법, 세퍼레이터 제조 방법 및 가소제 제조 방법 |
CN108539093A (zh) * | 2017-03-03 | 2018-09-14 | 住友化学株式会社 | 膜制造装置及膜制造方法 |
KR20180101239A (ko) * | 2017-03-03 | 2018-09-12 | 스미또모 가가꾸 가부시키가이샤 | 필름 제조 장치 및 필름 제조 방법 |
KR101979538B1 (ko) * | 2017-03-03 | 2019-05-16 | 스미또모 가가꾸 가부시키가이샤 | 필름 제조 방법, 세퍼레이터 제조 방법 및 가소제 제조 방법 |
CN108539093B (zh) * | 2017-03-03 | 2022-04-22 | 住友化学株式会社 | 膜制造装置及膜制造方法 |
KR101984427B1 (ko) * | 2017-03-03 | 2019-05-30 | 스미또모 가가꾸 가부시키가이샤 | 필름 제조 장치 및 필름 제조 방법 |
KR101984428B1 (ko) * | 2017-03-03 | 2019-05-30 | 스미또모 가가꾸 가부시키가이샤 | 필름 제조 장치 및 필름 제조 방법 |
US11007699B2 (en) | 2017-03-03 | 2021-05-18 | Sumitomo Chemical Company, Limited | Method of producing film, method of producing separator, and method of producing plasticizer |
JP2020001856A (ja) * | 2018-06-26 | 2020-01-09 | 東レ株式会社 | 通紙装置、フィルム製造装置及び微多孔膜製造装置、フィルム通し方法並びに微多孔膜製造方法 |
JP7172175B2 (ja) | 2018-06-26 | 2022-11-16 | 東レ株式会社 | 通紙装置、フィルム製造装置及び微多孔膜製造装置、フィルム通し方法並びに微多孔膜製造方法 |
Also Published As
Publication number | Publication date |
---|---|
EP3260266A4 (en) | 2018-11-07 |
KR20170117432A (ko) | 2017-10-23 |
KR102337426B1 (ko) | 2021-12-09 |
EP3260266B1 (en) | 2020-09-23 |
US20180036933A1 (en) | 2018-02-08 |
JPWO2016132807A1 (ja) | 2017-12-07 |
CN107428059B (zh) | 2019-10-18 |
EP3260266A1 (en) | 2017-12-27 |
JP6773022B2 (ja) | 2020-10-21 |
HUE052138T2 (hu) | 2021-04-28 |
CN107428059A (zh) | 2017-12-01 |
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