EP3706515B1 - Verfahren zur herstellung eines bahnmaterials sowie verfahren und vorrichtung zur beladungssteuerung - Google Patents

Verfahren zur herstellung eines bahnmaterials sowie verfahren und vorrichtung zur beladungssteuerung Download PDF

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Publication number
EP3706515B1
EP3706515B1 EP18871897.7A EP18871897A EP3706515B1 EP 3706515 B1 EP3706515 B1 EP 3706515B1 EP 18871897 A EP18871897 A EP 18871897A EP 3706515 B1 EP3706515 B1 EP 3706515B1
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EP
European Patent Office
Prior art keywords
web
charge
liquid
conveying roller
amount
Prior art date
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Active
Application number
EP18871897.7A
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English (en)
French (fr)
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EP3706515A4 (de
EP3706515A1 (de
Inventor
Masato Okuno
Mitsuru Watanabe
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Toray Industries Inc
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Toray Industries Inc
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Publication date
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Publication of EP3706515A4 publication Critical patent/EP3706515A4/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/14—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by electrical means
    • B05D3/141—Plasma treatment
    • B05D3/142—Pretreatment
    • B05D3/144—Pretreatment of polymeric substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • B05D7/04—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber to surfaces of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/02—Advancing webs by friction roller
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F1/00—Preventing the formation of electrostatic charges
    • H05F1/02—Preventing the formation of electrostatic charges by surface treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2252/00—Sheets
    • B05D2252/02—Sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/511—Processing surface of handled material upon transport or guiding thereof, e.g. cleaning
    • B65H2301/5114—Processing surface of handled material upon transport or guiding thereof, e.g. cleaning coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/513—Modifying electric properties
    • B65H2301/5132—Bringing electrostatic charge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/171—Physical features of handled article or web
    • B65H2701/1714—Magnetic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/175—Plastic
    • B65H2701/1752—Polymer film
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F1/00—Preventing the formation of electrostatic charges

Definitions

  • the present invention relates to a method for manufacturing a web with a controlled amount of charge, a charge control method and charge control device that control the amount of charge on the web.
  • Non-Patent Literature 1 In general, static electricity is generated when two substances rub against each other, causing one of the two substances to be relatively positively charged and the other to be relatively negatively charged.
  • the tendency of a substance to be positively or negatively charged when it rubs against another substance is common as triboelectric series for each substance, and by referring to the triboelectric series, it is possible to estimate a substance to be positively charged between two substances when frictional electrification is generated between the two substances.
  • An example of triboelectric series is given in Non-Patent Literature 1.
  • the web when a web such as a long-length polymer film is conveyed, the web is moved by rotating the conveying roller while supporting the web by the conveying roller, and this movement also generates static electricity between the web and the conveying roller, causing the surface of the conveyed web to be charged.
  • peeling discharge may occur between the web and the conveying roller at the position where the web being conveyed by the conveying roller separates from the conveying roller (called the roller separating point).
  • This results in the formation of discharge marks on the surface of the web which is a defect in the web.
  • the discharge marks cause uneven coating.
  • even if peeling discharge does not occur there is a problem that various dust particles easily adhere to the charged surface.
  • the conveying rollers are generally made of metals and are electrically conductive, the ions for static elimination are absorbed by the conveying rollers, resulting in decrease in static elimination capability. In the case where the surface of the web is not uniformly charged but is charged unevenly, the apparent charging potential is low and the static elimination may not be sufficiently performed.
  • Patent Literature 1 discloses that a material that is positively charged by frictional electrification with the web and a material that is negatively charged by frictional electrification with the web are alternately arranged in a conveying direction of the web to constitute conveying rollers, so that the web is not apparently charged in the broad sense.
  • Patent Literature 2 discloses that an electric charge opposite in polarity to the frictional charge is imparted to a surface opposite to a surface charged by friction in a web, and the electric charge opposite in polarity neutralizes the electric charge of the frictional charge.
  • Patent Literature 3 discloses that an electric charge opposite in polarity to the charge by frictional electrification is given to the surface of the web which comes into contact with the roller in advance before the web comes into contact with the roller.
  • Patent Literature 4 discloses a device for carrying a fiber web.
  • a temporary press-adhering device comprising a pair of upper and lower rolls disposed so as to nip the fiber-collecting surface of a conveyer therebetween is disposed on the outlet side of a suction box, and the lower roll is immersed in a liquid box disposed below the upper roll.
  • the formed web is passed between the rolls on the outlet side of the suction box.
  • the lower roll reduces the air flow reversely directed to the travel direction of the web because of being disposed in the liquid box, and further, imparts a small amount of a liquid to the web to remove static electricity.
  • Non-Patent Literature 1 Akinari Kasai, "Various Factors Influencing Charging Measurements," Journal of Polymer Science, The Society of Polymer Scienc, 1967, Vol. 16, No. 179, p. 323-329 .
  • Patent Literature 1 there is still a risk of peeling discharge because the web is charged at the microscopic level, and it is difficult to actively control the amount of charge on the surface of the web.
  • Patent Literature 2 Although the sum of the amount of charge on both sides of the front and back is zero and appears to be uncharged, there is actually an electric charge on each side, which causes, for example, uneven coating in the coating process, which is a later process. If one side of the web is contacted with the metal roller and is grounded under the state that there are electric charges on both sides of the web, the potential occurs due to the electric charge on the other side and the web may attract dust particles existing in the air.
  • the web before contacting the roller has a high potential, so the web may absorb dust particles or cause discharge when it comes into contact with the roller.
  • Patent Literature 1 may not sufficiently prevent peeling discharge.
  • Patent Literatures 2 and 3 have problems such as adsorption of dust particles or generation of discharge due to the charge imparted, although the technologies are designed to impart a charge opposite in polarity to the charge caused by frictional electrification in advance. It can be said that prevention of charging the web is one aspect of controlling the amount of charge on the web, but any general technology of controlling the amount of charge on the web by methods other than the method of imparting a charge is not known.
  • An object of the present invention is to provide a method for manufacturing a web in which the amount of charge is controlled without imparting a charge to the web in advance, and a charge control method and charge control device that control the amount of charge of the web.
  • the method for manufacturing a web is directed to a method for manufacturing a web, being a polymer film, including a conveying step of conveying a web, the method including a step of supplying a liquid to an interface between the web and a conveying roller that conveys the web to control an amount of charge generated on a surface of the web by frictional electrification between the conveying roller and the web.
  • the charge control method is directed to a charge control method for controlling an amount of charge on a web, being a polymer film, conveyed by a conveying roller, the charge control method including supplying a liquid to an interface between a web and a conveying roller that conveys the web to control an amount of charge generated on a surface of the web by frictional electrification between the conveying roller and the web.
  • the charge control device is directed to a charge control device for controlling an amount of charge on a web, being a polymer film, to be conveyed, the charge control device including a conveying roller configured to convey the web, and a supplying means of supplying a liquid to an interface between the conveying roller and the web, wherein the amount of charge generated on a surface of the web by frictional electrification between the conveying roller and the web is controlled by the liquid.
  • Frictional electrification can occur not only between solids, but also between solids and liquids.
  • a liquid for controlling the amount of charge is supplied to the interface between the web and the conveying roller that conveys the web.
  • the amount of charge generated on the surface of the web can be controlled by controlling the amount of the liquid supplied to the interface. Since frictional electrification occurs between the web and the liquid as well, the amount of charge on the surface of the web can be controlled by combining frictional electrification between the web and the conveying roller with frictional electrification between the web and the liquid.
  • the use of a liquid capable of generating a frictional charge between the web and the liquid can reduce the charge on the surface of the web or prevent charging on the surface of the web.
  • the kind of the liquid to be used can be determined based on the aforementioned triboelectric series, depending on the material of the web and the material of the surface of the conveying roller.
  • the amount of the liquid supplied to the interface between the conveying roller and the web is changed, the magnitude of the frictional charge between the web and the liquid changes, so the amount of the charge on the web can be controlled more precisely by controlling the amount of the liquid supplied to the interface.
  • the web is, for example, a long-length polymer film or an electrically insulating film.
  • the liquid may be supplied directly to the interface from the direction of entry of the web with respect to the interface, or the liquid may be sprayed towards the surface of the rotating conveying roller.
  • the liquid sprayed on the surface of the conveying roller is supplied to the interface between the conveying roller and the web by rotating the conveying roller.
  • the method of supplying the liquid in the case of supplying the liquid by spraying, the amount of the liquid consumed can be reduced and the amount of the liquid supplied can be precisely controlled, as compared with the case of supplying the liquid directly to the interface.
  • the conveying roller in order to control the amount of charge in the width direction of the web (direction orthogonal to the conveying direction), the conveying roller may be divided into a plurality of regions along the longitudinal direction of the conveying roller, and the amount of the liquid to be supplied may be controlled in each of the divided regions.
  • FIG. 1 shows the charge control device in an aspect of the present invention. This charge control device is used for manufacturing a web by the manufacturing method in the present invention.
  • the charge control device shown in FIG. 1 is configured to be used in the step of conveying the web 10, and includes a conveying roller 20 that conveys the web 10, and a spray nozzle 30 disposed so as to face the surface of the conveying roller 20 at a position opposite to the position where the conveying roller 20 contacts the web 10.
  • the web 10 may be, for example, a film for magnetic recording tapes, a film for mold release, a film for capacitors, a film for battery separators, or the like, and is not limited to these.
  • a film for magnetic recording tapes the film for mold release, or the film for battery separator
  • it is effective from the viewpoint of preventing uneven coating when the final product is obtained through a coating process. It is also effective in preventing the adhesion of dust particles or the like due to static electricity in the case of the film for battery separator, which requires strict control of foreign substances.
  • the conveying step includes at least one rotating conveying roller, and is a step of conveying a web by utilizing the frictional force generated between the conveying roller and the web in a state where the conveying roller and the web are in contact.
  • Another rotating roller may be installed before and after the aforementioned conveying roller(s) and the web may be conveyed, or the ends of the web may be grasped by a running clip or the like, and the web may be conveyed.
  • the spray nozzle 30 is an atomizer that sprays a liquid b for charge control on the rotating conveying roller 20, and functions as a supplying means of supplying the liquid b for charge control to the interface between the conveying roller 20 and the web 10.
  • the supplying means may be an atomizer that sprays a liquid on a rotating conveying roller.
  • the liquid b for charge control is supplied to the spray nozzle 30, and compressed air a is also supplied thereto for spraying the liquid b for charge control.
  • the spray nozzle 30 is covered with a nozzle cover 40 in order to prevent the liquid b for charge control from splashing at an unintended position.
  • the nozzle cover 40 has a slit 41 extending in the longitudinal direction of the conveying roller 20 at a position facing the conveying roller 20, and the liquid b for charge control sprayed from this spray nozzle 30 passes through this slit 41 and reaches the conveying roller 20.
  • the width of the slit 41 (length along the direction of rotation of the conveying roller 20) is adjustable within the range of, for example, 10 mm to 30 mm, and the gap between the position of the slit 41 and the surface of the conveying roller 20 is, for example, about 2 mm.
  • One spray nozzle 30 can spray the liquid over an area of, e.g. about 30 cm in the longitudinal direction of the conveying roller 20.
  • an electrometer 50 is arranged at a position downstream of the conveying roller 20 in the conveying direction of the web 10 to measure the surface potential of the surface of the web 10 with which the conveying roller 20 is contact.
  • the electrometer 50 is not essential, as is clear from the Examples described below, the surface potential of the web 10 changes depending on the supply amount of the liquid b for charge control and the amount of charge changes, so that the amount of charge of the web 10 can be more precisely controlled by providing the electrometer 50 and controlling the supply amount of the liquid b for charge control based on the measured value.
  • the surface of the web 10 conveyed downstream from the conveying roller 20 may be wet with the liquid b for charge control, and this liquid b for charge control can be removed by, for example, air blowing, heating drying, scraping off with a nip roller, or the like.
  • the amount of the charge on the web 10 can be controlled, and in particular, the amount of the charge on the web 10 can be reduced to almost zero by using the liquid b for charge control capable of generating a frictional charge between the web and the liquid, the frictional charge being opposite in polarity to the charge generated on the surface of the web by frictional electrification between the conveying roller and the web, and controlling the supplied amount of the liquid b.
  • What liquid is used as the liquid b for charge control can be determined based on the triboelectric series, depending on the target charge amount, the material of the web 10, and the material of the surface of the conveying roller 20, but it is preferable to select a liquid that does not change the properties of the web 10.
  • the surface material of the conveying roller 20 that tends to generate positive frictional charge examples thereof include silicon rubber, hard chrome plating and the like, and as the liquid that tends to generate negative frictional charge, examples thereof include water and the like.
  • examples thereof include glass and the like
  • examples thereof include a halogen-based solvent such as trichlorobenzene and dichloromethane.
  • the width of the web 10 may be larger than the width to which the liquid b for charge control can be sprayed from one atomizer as a supplying means.
  • the charge control can be performed only in a part of the web 10.
  • FIG. 2 shows an arrangement of atomizers (spray nozzles 30) in a charge control device corresponding to the web 10 having a large width. For ease of explanation, the web 10 is not shown in FIG. 2 .
  • the charge control device shown in FIG. 2 is similar to the one shown in FIG. 1 , and supplies the liquid b for charge control to the interface between the web 10 and the conveying roller 20 by spraying the liquid b for charge control from the spray nozzle 30 to control the amount of the charge on the web 10.
  • water is assumed to be used as the liquid b for charge control.
  • a plurality of spray nozzles 30 (three in this case) that are atomizers are provided, and these spray nozzles 30 are arranged within a single nozzle cover 40 in the longitudinal direction of the conveying roller 20.
  • Air a used for spraying water is commonly supplied to the plurality of spray nozzles 30.
  • the slit 41 in the nozzle cover 40 is provided over almost the entire length of the conveying roller 20 in the longitudinal direction so as to face the conveying roller 20.
  • the conveying roller 20 is divided into three regions (L region, C region and R region, each shown therein) along the longitudinal direction.
  • the water used for spraying is supplied via a pressure reducing valve 31, and is branched into three pipes 32 to 34 at the outlet side of the pressure reducing valve 31, and a spray nozzle 30 is provided at the end of each of the pipes 32 to 34.
  • the pipes 32 to 34 correspond to the L region, C region and R region, and each of them is equipped with a valve 35 and a flowmeter 36.
  • the device shown in FIG. 1 was assembled.
  • a soft polyethylene sheet manufactured by Kokugo Co., Ltd.
  • a metal roller having a diameter of 150 mm and a hard chrome plated surface was used as the conveying roller 20.
  • a two-fluid nozzle (model number: SCBIMV 80005S) manufactured by H. Ikeuchi & Co., Ltd. was used as the spray nozzle 30 being an atomizer.
  • Tap water was used as the liquid b for charge control, and this tap water and air a were supplied to the spray nozzle 30 so that water could be sprayed on the conveying roller 20.
  • the web 10 was conveyed at 30 m/min by rotating the conveying roller 20. Then, the surface potential of the web 10 was measured with the electrometer 50 installed on the downstream side of the conveying roller 20 while changing the presence or absence of water spray and the flow rate of water spray. The results are shown in Table 1.
  • the surface potential of the web 10 i.e., the amount of charge on the web 10 can be controlled by controlling the flow rate of water spray, i.e., the amount of water supplied to the interface between the conveying roller 20 and the web 10.
  • Table 1 Flow rate of water spray [mL/min] 0 7 11 16 Surface potential [kV] +15 +8 0 -17
  • Example 2 The experiment was performed in the same manner as Example 1 other than a glass-coating roller was used as the conveying roller 20 and 1,2,4-trichlorobenzene was used as the liquid b for charge control.
  • the results are shown in Table 2. From Table 2, it can be found that, in the case of not spraying the liquid, the surface potential of the web 10 was -9 kV and was negative, but in the case of spraying the liquid, the surface potential changed in a positive direction.
  • a method for manufacturing a web, charge control method, and charge control device which can manufacture a web with a controlled charge without imparting a charge to the web in advance, and can control the amount of the charge on the web, are provided.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Advancing Webs (AREA)
  • Elimination Of Static Electricity (AREA)

Claims (13)

  1. Verfahren zur Herstellung eines Rollmaterials (10), das eine Polymerfolie ist, umfassend einen Förderungsschritt zum Fördern des Rollmaterials (10),
    wobei das Verfahren einen Schritt zum Zuführen einer Flüssigkeit (b) an eine Schnittstelle zwischen dem Rohmaterial (10) und einer Förderwalze (20) aufweist, die das Rohmaterial (10) transportiert, um eine Ladungsmenge zu steuern, die auf einer Oberfläche des Rollmaterials (10) durch Reibungselektrisierung zwischen der Förderwalze (20) und dem Rohmaterial (10) erzeugt wird.
  2. Verfahren nach Anspruch 1, wobei die Flüssigkeit (b) eine Flüssigkeit ist, die in der Lage ist, eine Reibungsladung zwischen dem Rohmaterial (10) und der Flüssigkeit (b) zu generieren, wobei die Reibungsladung eine entgegengesetzte Polarität zu der auf der Oberfläche des Rollmaterials (10) durch Reibungselektrisierung zwischen der Förderwalze (20) und dem Rohmaterial (10) generierten Ladung aufweist.
  3. Verfahren nach Anspruch 1 oder 2, wobei die Menge der auf der Oberfläche des Rollmaterials (10) erzeugten Ladung durch Steuern einer Menge der an die Schnittstelle zugeführten Flüssigkeit (b) gesteuert wird.
  4. Verfahren nach Anspruch 3, wobei die Förderwalze (20) in eine Mehrzahl von Abschnitten entlang einer Längsrichtung der Förderwalze (20) unterteilt ist und die Menge der Flüssigkeit (b) in jedem der unterteilten Abschnitte gesteuert wird.
  5. Ladungssteuerverfahren zum Steuern einer Ladungsmenge auf einem Rohmaterial (10), das eine durch eine Förderwalze (20) geförderte Polymerfolie ist,
    wobei das Ladungssteuerverfahren ein Zuführen einer Flüssigkeit (b) an eine Schnittstelle zwischen dem Rohmaterial (10) und einer Förderwalze (20) aufweist, die das Rohmaterial (10) fördert, um eine Ladungsmenge zu steuern, die auf einer Oberfläche des Rollmaterials (10) durch Reibungselektrisierung zwischen der Förderwalze (20) und dem Rohmaterial (10) erzeugt wird.
  6. Ladungssteuerverfahren nach Anspruch 5, wobei die Flüssigkeit (b) eine Flüssigkeit ist, die in der Lage ist, eine Reibungsladung zwischen dem Rohmaterial (10) und der Flüssigkeit (b) zu erzeugen, wobei die Reibungsladung eine entgegengesetzte Polarität zu der auf der Oberfläche des Rohmaterials (10) durch Reibungselektrisierung zwischen der Förderwalze (20) und dem Rohmaterial (10) erzeugten Ladung aufweist.
  7. Ladungssteuerverfahren nach Anspruch 5 oder 6, wobei die Menge der auf der Oberfläche des Rohmaterials (10) erzeugten Ladung durch Steuern einer Menge der an die Schnittstelle zugeführten Flüssigkeit (b) gesteuert wird.
  8. Ladungssteuerverfahren nach Anspruch 7, wobei die Förderwalze (20) in eine Mehrzahl von Abschnitten entlang einer longitudinalen Richtung der Förderwalze (20) unterteilt ist und die Menge der Flüssigkeit (b) in jedem der unterteilten Abschnitte gesteuert wird.
  9. Ladungssteuereinheit zum Steuern einer Ladungsmenge auf einem Rohmaterial (10), das eine zu fördernde Polymerfolie ist, wobei die Ladungssteuereinheit umfasst:
    eine Förderwalze (20), die zum Fördern des Rohmaterials (10) konfiguriert ist; und
    ein Zuführmittel (30) zum Zuführen einer Flüssigkeit (b) an eine Schnittstelle zwischen der Förderwalze (20) und dem Rohmaterial (10),
    wobei eine Menge an Ladung, die auf einer Oberfläche des Rohmaterials (10) durch Reibungselektrisierung zwischen der Förderwalze (20) und dem Rohmaterial (10) generiert wird, durch die Flüssigkeit (b) gesteuert wird.
  10. Ladungssteuereinheit nach Anspruch 9, wobei die Flüssigkeit (b) eine Flüssigkeit ist, die in der Lage ist, eine Reibungsladung zwischen dem Rohmaterial (10) und der Flüssigkeit (b) zu erzeugen, wobei die Reibungsladung eine entgegengesetzte Polarität zu der auf der Oberfläche des Rohmaterials (10) durch Reibungselektrisierung zwischen der Förderwalze (20) und dem Rohmaterial (10) erzeugten Ladung aufweist.
  11. Ladungssteuereinheit nach Anspruch 9 oder 10, wobei die Menge der auf der Oberfläche des Rohmaterials (10) erzeugten Ladung durch Steuern einer Menge der durch die Zuführmittel (30) an die Schnittstelle zugeführten Flüssigkeit (b) gesteuert wird.
  12. Ladungssteuereinheit nach Anspruch 11, wobei die Förderwalze (20) in eine Mehrzahl von Abschnitten entlang einer longitudinalen Richtung der Förderwalze (20) unterteilt ist und das Zuführmittel in jedem der unterteilten Abschnitte enthalten ist.
  13. Ladungssteuereinheit nach einem der Ansprüche 9 bis 12, wobei das Zuführmittel (30) ein Zerstäuber ist, aus dem die Flüssigkeit (b) auf die rotierende Förderwalze (20) gesprüht wird.
EP18871897.7A 2017-10-30 2018-10-29 Verfahren zur herstellung eines bahnmaterials sowie verfahren und vorrichtung zur beladungssteuerung Active EP3706515B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017209140 2017-10-30
PCT/JP2018/040198 WO2019088052A1 (ja) 2017-10-30 2018-10-29 ウェブの製造方法、帯電制御方法及び帯電制御装置

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