WO2022190713A1 - 被膜付きフィルムからの被膜の剥離方法および被膜の剥離装置 - Google Patents

被膜付きフィルムからの被膜の剥離方法および被膜の剥離装置 Download PDF

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Publication number
WO2022190713A1
WO2022190713A1 PCT/JP2022/003837 JP2022003837W WO2022190713A1 WO 2022190713 A1 WO2022190713 A1 WO 2022190713A1 JP 2022003837 W JP2022003837 W JP 2022003837W WO 2022190713 A1 WO2022190713 A1 WO 2022190713A1
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WIPO (PCT)
Prior art keywords
coating
film
cleaning liquid
coated film
peeling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/003837
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English (en)
French (fr)
Japanese (ja)
Inventor
聖 谷野
佳久 東田
一敬 渡邊
維允 鈴木
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Toray Industries Inc
Original Assignee
Toray Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toray Industries Inc filed Critical Toray Industries Inc
Priority to EP22766679.9A priority Critical patent/EP4306223A4/en
Priority to US18/279,956 priority patent/US20240149581A1/en
Priority to CN202280010979.3A priority patent/CN116783006A/zh
Priority to KR1020237026924A priority patent/KR20230154802A/ko
Priority to JP2022508805A priority patent/JPWO2022190713A1/ja
Publication of WO2022190713A1 publication Critical patent/WO2022190713A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B43/00—Operations specially adapted for layered products and not otherwise provided for, e.g. repairing; Apparatus therefor
    • B32B43/006—Delaminating
    • 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
    • B05D3/10—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 other chemical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/041—Cleaning travelling work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/022—Cleaning travelling work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/0004—Component parts, details or accessories; Auxiliary operations
    • B29C63/0013—Removing old coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/06—Interconnection of layers permitting easy separation
    • 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
    • B05D2201/00—Polymeric substrate or laminate
    • 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
    • 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
    • B05D3/10—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 other chemical means
    • B05D3/101—Pretreatment of polymeric substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/007—Heating the liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2230/00—Other cleaning aspects applicable to all B08B range
    • B08B2230/01—Cleaning with steam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0014—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by incorporation in a layer which is removed with the contaminants

Definitions

  • the present invention relates to a method and an apparatus for peeling a coating from a film with a coating that can efficiently remove the coating on the surface of the thermoplastic resin film.
  • a general method for producing this MLCC includes steps of using a release film in which a release layer is formed on a plastic base film as a carrier sheet, forming a ceramic green sheet layer on the release film, and There is a step of peeling off the ceramic green sheet layer to form a ceramic green sheet. In this step, the release film from which the ceramic sheet has been peeled off is discarded as an unnecessary material.
  • Patent Document 1 as a method for removing a release component from a release film, a release film in which a water-soluble resin layer is formed between a base film and a release layer is used, and is placed in a hot water bath for 2 seconds or longer. A method of peeling off the release layer by rubbing the surface of the release film with a brush roll after immersion is disclosed.
  • the present invention provides a coating having a coating containing a water-soluble resin on at least one side of the substrate film. It is an object of the present invention to provide a coating stripping method and a coating stripping device capable of efficiently removing a coating from the surface of a coated film by dissolving a water-soluble resin using a very small amount of solvent.
  • the coating stripping method of the present invention for solving the above problems is a method for stripping a coating from a coated film having a coating containing a water-soluble resin on at least one side of a base film, wherein the coating is in a state of droplets on the surface of the coating. is applied, the cleaning liquid is retained on the surface of the coating in the form of droplets, and then the coating containing the cleaning liquid is peeled off from the coated film.
  • the peeling method of the film with a coating of this invention is the following methods. - The cleaning liquid is heated to 40°C or higher and applied to the surface of the film. - Heat the coated film to 40°C or higher. - The film contains a curable silicone resin. - The cleaning liquid is water. - The droplet diameter of the washing liquid is 1 mm or less.
  • the coating peeling device of the present invention for solving the above problems is a device for peeling a coating from a coated film having a coating containing a water-soluble resin on at least one surface of a base film, wherein droplets are directed toward the surface of the coating.
  • the cleaning liquid is applied from a cleaning liquid application mechanism that discharges the cleaning liquid in the state of (1) so that the cleaning liquid can maintain a droplet state on the surface of the coating, and from the coated film in which the cleaning liquid is applied to the surface of the coating. and a peeling mechanism for peeling the included coating.
  • the apparatus for cleaning a film with a coating of the present invention preferably has the following aspects.
  • the cleaning liquid application mechanism includes means for heating the cleaning liquid.
  • a means for heating the coated film is provided.
  • the coating can be efficiently peeled off from the coated film having the coating containing the water-soluble resin on at least one side of the base film with a small amount of cleaning liquid. .
  • FIG. 1 is a schematic diagram of a peeling device 101 according to a first embodiment of the invention
  • FIG. It is the schematic of the peeling apparatus 201 of the 2nd Embodiment of this invention.
  • It is the schematic of the peeling apparatus 301 of the 3rd Embodiment of this invention.
  • 4 is a schematic diagram of a conventional peeling device 401.
  • FIG. FIG. 5 is a schematic diagram of a peeling device 501 of an embodiment different from the present invention;
  • FIG. 6 is a schematic diagram of a stripping device 601 of an embodiment different from the present invention;
  • the present inventors have made intensive studies on a method for efficiently removing the coating from the surface of the coated film having a coating containing a water-soluble resin on at least one side of the base film using a very small amount of cleaning liquid.
  • the present inventors have found the following method and device for peeling off a film with a film.
  • the method for stripping a coated film of the present invention is a method in which a coated film having a coating containing a water-soluble resin on at least one side of the base film is peeled off from the base film to remove the coating containing the cleaning liquid. be.
  • the film with a film to be targeted can be any film with a film having a film containing a water-soluble resin in consideration of the load on the environment.
  • water-soluble resins include at least one of water-soluble polyester resins, polyester urethane resins, acrylic resins, ethylene ionomer resins, polyvinyl alcohol resins, polyvinylpyrrolidone resins, ethylene-vinyl alcohol resins, and starch. More preferably, seeds are the main component.
  • the film containing the water-soluble resin may be a single layer containing the water-soluble resin or a laminate of two or more layers containing the water-soluble resin. It may be a laminate of layers that do not contain.
  • a release film with a coating containing a release component in addition to a water-soluble resin in a part of the coating is particularly preferable, and the effect of peeling the coating can be efficiently exhibited.
  • the release component as used herein is a component that increases the contact angle of the film surface with respect to the cleaning liquid, that is, reduces the surface energy of the film.
  • a compound having a group and a compound having fluorine can be mentioned.
  • the film may be a layer containing a water-soluble resin and a release component, or may be a laminate of a layer containing a water-soluble resin and a layer containing a release component.
  • a layer containing a water-soluble resin is formed immediately above the base film, and then a layer containing a release component is formed on the outermost surface, and the release component is suitable as a cleaning liquid. It is particularly preferable to use a curable silicone resin compound having a dimethylsiloxane as a main skeleton and having high water permeability.
  • the coating peeling method of the present invention comprises applying a cleaning liquid in the form of droplets to the coating surface of the coated film, allowing the cleaning liquid to be retained in the coating surface in the form of droplets, and then removing the coating containing the cleaning liquid from the substrate film. It is a stripping method to remove from.
  • the cleaning liquid applied to the surface of the coating can be applied even to a film with a coating whose surface tension is smaller than the surface tension of the cleaning liquid. does not flow and maintains the droplet state, the cleaning liquid can be applied to substantially the entire surface of the coating.
  • the applied cleaning liquid dissolves the water-soluble resin in the film and diffuses to the surroundings, and the cleaning liquid spreads over the entire surface of the coating.
  • the coating can be easily peeled off.
  • the release component contains the curable silicone resin compound having the dimethylchloroxane as a main skeleton.
  • the cleaning liquid permeates through the surface of the film and reaches the layer containing the water-soluble resin, so that a similar cleaning effect is exhibited and the coating can be peeled off.
  • the size of the droplets of the cleaning liquid applied to the surface of the coating may be any size as long as the cleaning liquid can be discretely held on the coating in the form of droplets. It may flow due to inclination or vibration, and the discretely applied cleaning liquid may be unevenly distributed. Therefore, in order to suppress the flow of droplets on the film, the diameter of the droplets is preferably 1 mm or less. In order to efficiently wash the entire surface of the coating, it is preferable to apply 1 cm 3 or more of the cleaning liquid per unit area of 1 m 2 to a coated film having a total coating thickness of 1 ⁇ m or less.
  • the diameter of the droplet of the cleaning liquid shown here is a numerical value obtained by observing and measuring the droplet less than 1 second after applying the cleaning liquid to the surface of the film in the form of a droplet.
  • the diameter of the droplets can be easily measured by observing the applied washing liquid droplets from the back side of the film.
  • the phenomenon in which the cleaning liquid diffuses while dissolving the water-soluble resin progresses, making measurement difficult. .
  • the temperature of the cleaning solution applied to the coated film is preferably 150° C. or lower in order to suppress heat-induced dimensional change and deterioration of flatness of the base film. Therefore, the cleaning liquid is discharged in the state of droplets whose temperature is adjusted according to the configuration of the device to be used so that the temperature of the cleaning liquid and the film temperature of the portion to which the cleaning liquid is applied are in the range of 40° C. to 150° C. respectively. is preferred.
  • the rate of dissolution of the water-soluble resin by the cleaning liquid applied to the coated film surface can also be increased by raising the temperature of the coated film, that is, the cleaning effect is improved.
  • the temperature it is preferable to set the temperature of the coated film to 40° C. or higher and 150° C. or lower.
  • the temperature of the coated film shown here is the temperature of the coated film surface immediately before the cleaning liquid is applied, and can be measured using a radiation thermometer or the like.
  • the droplet diameter of the cleaning liquid is preferably 10 ⁇ m or more. By doing so, even if part of the cleaning liquid evaporates at a high temperature, the coating can be cleaned.
  • any solvent capable of dissolving the water-soluble resin can exhibit its effect, but in order to reduce the environmental load, it is preferable to use water.
  • a surfactant or the like may be added to the cleaning liquid in order to improve the wettability with the coated film and facilitate the spreading of the cleaning liquid over the coated film surface.
  • the form of the film with the film may be cut sheet-like, but it is particularly preferable that the film with the film is wound into a roll.
  • FIG. 1 is a schematic diagram of a coating stripping apparatus 101 according to a first embodiment of the present invention.
  • the coating peeling device 101 includes an unwinding device 4 for unwinding the coated film 2 and a winding device 5 for winding the base film 3 after the coating has been peeled off. Between the unwinding device 4 and the winding device 5 are a driving device 9 for transporting the coated film 2, an ejection head 6 for applying the cleaning liquid 11 to the coating of the coated film 2, the cleaning liquid 11 and the coating. A peeling device 7 for peeling the coating of the attached film 2 together, and a driving device 10 for conveying the base film 3 after peeling the coating are provided.
  • a booth 8 surrounds the ejection head 6 , the peeling device 7 , and the nozzles 14 described later. Further, as a cleaning liquid application mechanism, in addition to the ejection head 6, a liquid sending pump 12 for sending the cleaning liquid 11 to the ejection head 6 and a tank (not shown) for storing the cleaning liquid are provided.
  • the ejection head 6 is only required to eject the cleaning liquid 11 in the form of droplets and apply it to the coating surface of the coated film 2. Examples thereof include, but are not limited to, spray nozzles.
  • the amount of the cleaning liquid 11 applied to the surface of the coated film 2 is preferably 1 cm 3 /m 2 or more so that the coating containing the water-soluble resin can be sufficiently dissolved.
  • the specifications of the ejection head 6 and the liquid-sending pump 12 are adjusted so that the liquid-sending pump 12 is adjusted to apply the necessary amount of the cleaning liquid 11 to the coating surface of the film 2 with the coating, and the state of droplets can be maintained. It is better to confirm
  • the cleaning liquid 11 applied to the coating surface of the coated film 2 needs to dissolve the water-soluble resin contained in the coating before being transported to the peeling device 7 . That is, the cleaning liquid 11 preferably has a droplet size of 1 mm or less in diameter so that it does not flow and drop off from the surface of the coated film 2 due to vibration when the coated film 2 is conveyed or inclination of the coated film 2 . Therefore, it is preferable to select the ejection head 6 that can reduce the diameter of droplets to 1 mm or less.
  • the ejection head 6 and the peeling device 7 may be installed facing the coated surface of the coated film 2, and are not limited to installation on the lower surface side as shown in FIG.
  • the unwinding direction of the coated film 2 is switched so that the coating of the coated film 2 wound in a roll can be applied to either the inner or outer surface of the roll. It is more preferable that the unwinding device 4 has a mechanism capable of handling both upward and downward ejection so that the surface can be conveyed facing the ejection head 6 and the peeling device 7 .
  • the ejection head 6 is preferably capable of ejecting the heated cleaning liquid 11, and particularly preferably capable of ejecting the cleaning liquid 11 heated to 40° C. or higher.
  • the cleaning liquid 11 may be heated by providing a heat source such as a cartridge heater in the ejection head 6 or by heating a tank (not shown) storing the cleaning liquid.
  • a heat source such as a cartridge heater in the ejection head 6 or by heating a tank (not shown) storing the cleaning liquid.
  • the material of the ejection head 206 preferably has heat resistance in order to eject the heated cleaning liquid 11, and metal or heat-resistant resin is preferably used.
  • the film peeling device 101 also includes a hot air generator 13 and a nozzle 14 connected to the hot air generator 13 as means for heating the film 2 with a film.
  • a hot air generator 13 By raising the temperature of the coated film 2 to 40° C. or higher with hot air, the water-soluble resin contained in the coating is quickly dissolved by the cleaning liquid 11 applied to the coating surface, and the coating can be peeled off more efficiently.
  • the means for heating the coated film 2 may be any means, for example, the coated film 2 may be brought into direct contact with a heating roll, or an infrared heater may be installed in the booth 8 for heating. Not limited.
  • the booth 8 of the peeling device 101 is equipped with a cleaning liquid 11 in the form of droplets in order to prevent the cleaning liquid 11 from scattering around and to prevent the temperature of the heated cleaning liquid and/or the coated film 2 from decreasing. It is equipped so as to surround from the ejection head 6 to the peeling device 7 .
  • the material of the booth 8 preferably has heat resistance because the inside of the booth 8 becomes hot, and metal, glass, or the like is preferably used.
  • the peeling device 7 is provided with a metal plate with a sharp tip that is in direct contact with the conveyed coated film 2 .
  • a thin metal plate that is pressed against the coated film 2 and bends like a blade may be provided.
  • a mechanism for rotating a brush roll made of metal or resin in the same direction or in the opposite direction to the conveying direction may be provided to directly contact the surface of the coated film 2, or a waste or cloth may be used to coat the film. It may be peeled off by pressing against the attached film 2 and wiping off the coating.
  • the driving devices 9 and 10 in the present invention preferably have a configuration capable of cutting tension in order to stably convey the film 2 with the coating and the base film 3 from which the coating has been peeled off. In some cases, part of the coating of the coated film 2 may be sucked, which may cause trouble. Therefore, a configuration in which a metal driving roll and a rubber roll are nipped is more preferably used. In addition, since there is a high possibility that the cleaning liquid 11 will adhere to the driving devices 9 and 10, stainless steel or surface-treated ones are preferably used as anti-corrosion measures.
  • a drying device (not shown) may be provided between 7 and the winding device 5 .
  • the drying device may be installed before the winding, and may be installed before or after the driving device 10 .
  • an inspection machine (not shown) may be provided in front of the winding device 5 to detect coating residues and environmental foreign matter adhering during the process. good.
  • An inspection machine may be selected according to the properties of the base film 3, and an inspection machine using transmitted light or reflected light is preferably used.
  • a marking device (not shown) may be provided between the inspection machine and the winding device 5 for recording the positions of film residues detected by the inspection machine and environmental foreign substances adhered during the process. Any marking method such as a pen, a sticker, or a laser may be used as long as the position of the detection target can be marked by the marking device.
  • FIG. 2 is a schematic diagram of a peeling device 201 according to a second embodiment of the invention.
  • the peeling device 201 is provided with a non-contact peeling device 207 instead of the peeling device 7 provided in the peeling device 101 of the first embodiment.
  • the peeling device 201 does not include the hot air generator 13 and the nozzle 14 , it may have the hot air generator 13 and the nozzle 14 . Since the components other than the above are the same as those of the peeling device 101 of FIG.
  • the non-contact stripping device 207 may strip both the cleaning liquid 11 and the film in a non-contact manner. As a result, compared with the peeling device 7 that makes direct contact with the coating surface, the transport resistance of the coated film 2 is prevented from increasing, and the substrate film 3 is not damaged by scratches due to contact.
  • FIG. 3 is a schematic diagram of a peeling device 301 for peeling a coating from a coated film 302 having coatings on both front and back surfaces according to the third embodiment of the present invention.
  • the stripping device 301 includes a first discharge head 306 for applying the cleaning liquid 11 to the coating surface of one side of the coated film 302, and strips the cleaning liquid 11 and the coating together between the unwinding device 4 and the winding device 5.
  • a second stripping device 307 ′ is provided opposite the first stripping device 307 through the coated film 302 in direct contact with the coated surface.
  • a cleaning liquid application mechanism in addition to the first ejection head 306 and the second ejection head 306', there is provided a mechanism for feeding the cleaning liquid 11, 11' to the first ejection head 306 and the second ejection head 306'. Equipped with liquid-sending pumps 312 and 312' and tanks (not shown) for storing cleaning liquids 11 and 11'.
  • the peeling device 301 does not have the hot air generator 13 and the nozzle 14 , but may have the hot air generator 13 and the nozzle 14 . Other than that, it is the same as the peeling device 101 of FIG.
  • the cleaning liquids 11 and 11' are simultaneously applied to the surface of the coated film 302 having the coating on both the front and back surfaces, and the first peeling device 307 and the second peeling device 307' are applied.
  • the device configuration is such that both the cleaning liquids 11 and 11' and the film are peeled off in order
  • the present invention is not limited to this, and any configuration may be used as long as the cleaning liquids 11 and 11' and the coating can be peeled off from the front and back respectively.
  • a first ejection head 306 and a first stripping device 307 are provided, and then a second ejection head 306' and a second stripping device 307' are provided, and the cleaning liquids 11 and 11' and the coating are sequentially applied one side at a time.
  • a device configuration in which both are peeled off may be used.
  • the first peeling device 307 and the second peeling device 307' are not limited to the configuration shown in FIG. 3, and non-contact peeling devices may be employed.
  • a device for exposing the coated film surface of the coated film 2, 302 is provided between the unwinding device 4 and the driving device 9.
  • the coated film is suitably used as a mold release film for the process due to its surface free energy characteristics, Specifically, it is used as a release film for extracting a release object in a desired shape after providing a release object on the coating of the coated film.
  • a film with a coating after being used as a release film for such a process may have an object to be released on the surface of the coating.
  • a device for exposing the coated surface of the coated film is provided to expose the coated surface of the coated film 2 , 302 .
  • the equipment for exposing the film surface may be of a contact type or a non-contact type, and is appropriately selected depending on the remaining state of the material to be released.
  • the material to be released is selected appropriately according to the characteristics of the film, and mainly includes inorganic substances such as metals provided by vapor deposition, adhesives made of organic substances such as acrylics provided by coating, and barium titanate.
  • a ceramic green sheet as a component can be exemplified.
  • Polyvinyl alcohol resin as a water-soluble resin is formed to a thickness of 0.1 ⁇ m on a base film of polyethylene terephthalate having a thickness of 30 ⁇ m. A attached film was produced.
  • the surface energy is 70 mN/m or more, so any dyne pen can hold the drawing.
  • the surface energy is 43.8 mN/m, so the surface energy is 30 mN/m dyne pen drawing is retained, but the dyne pen drawing of 70 mN/m cannot be retained.
  • Example 1 The coated film 2 was set on the unwinding device 4 of the peeling device 101 shown in FIG. While the coated film is conveyed to the booth 8 by the driving device 9, water (normal temperature: 20° C.) is sprayed as the cleaning liquid 11 from the spray nozzle (1/4M KB 80063N S303-RW manufactured by Ikeuchi Co., Ltd.) of the ejection head 6 inside the booth 8. was applied in the form of droplets to the coating surface. The washing liquid 11 in the form of droplets applied to the coating surface is then brought into contact with the coated film with a plate made of SUS630 with a sharp tip in the peeling device 7 to separate the washing liquid 11 and the coating from the base film 3.
  • the base film 3 from which the coating was peeled was wound up by the winding device 5 .
  • the conveying speed was increased from 10 m/min to 10, 30, 50 and 100 m/min.
  • heating of the coated film 2 by the hot air generator 13 and the nozzle 14 was not performed.
  • the cleaning liquid 11 discharged from the spray nozzle is sent from a monopump (CY08 manufactured by Hyoshinso Co., Ltd.), and the amount of liquid sent is adjusted according to the speed of transportation.
  • the unit area of the film 2 was 30 cm 3 per 1.0 m 2 . Droplets of the cleaning liquid 11 applied to the coated film 2 were observed from the rear surface, and it was confirmed that the diameter of the droplets was 1 mm at maximum.
  • the temperature of the coated film 2 was measured using a radiation thermometer from the back surface of the coated film 2 immediately after the droplets were applied, it was 20°C.
  • the maximum transport speed at which both the curable silicone resin and the water-soluble polyvinyl alcohol resin film of the release component could be peeled was 30 m. /min. At higher transport speeds of 50 and 100 m/min, peeling evaluation confirmed that part of the curable silicone resin or polyvinyl alcohol resin coating remained.
  • Example 2 The operation of Example 1 was carried out except that water at 50° C. was used as the cleaning liquid 11 discharged from the spray nozzle (1/4M KB 80063N S303-RW manufactured by Ikeuchi Co., Ltd.). The water at 50° C. was sent to the spray nozzle 6 using the liquid sending pump 12 after adjusting the temperature by putting an immersion heater into the tank storing the cleaning liquid 11 . In addition, droplets of the cleaning liquid 11 applied to the coated film 2 were observed from the rear surface, and it was confirmed that the maximum diameter of the droplets was 1.0 mm. When the temperature of the coated film 2 was measured using a radiation thermometer from the rear surface of the coated film 2 immediately after the droplets were applied, it was 40°C.
  • the maximum conveying speed at which both the curable silicone resin and the water-soluble polyvinyl alcohol resin film of the release component could be peeled off was 50 m. /min. At a conveying speed of 100 m/min, peeling evaluation confirmed that part of the curable silicone resin or polyvinyl alcohol resin film remained.
  • Example 3 The procedure of Example 2 was carried out, except that the temperature of the washing liquid 11 in Example 2 was water at 90°C. In addition, droplets of the cleaning liquid 11 applied to the coated film 2 were observed from the rear surface, and it was confirmed that the maximum diameter of the droplets was 1.0 mm. The temperature of the coated film 2 was measured using a radiation thermometer from the rear surface of the coated film 2 immediately after the droplets were applied, and it was 75°C. When the substrate film 3 with the film peeled off after being wound up by the winding device 5 was sampled, the maximum transport speed at which both the curable silicone resin and the water-soluble polyvinyl alcohol resin film of the release component could be peeled off was 100 m. /min.
  • Example 4 In the peeling apparatus 101 of Example 1, the hot air (60 ° C.) generated using the hot air generator 13 (TSK-56 manufactured by Kansai Electric Heating Co., Ltd.) is passed from the nozzle 14 having a slit-shaped opening to the coated film 2. The operation of Example 1 was carried out, except that the droplets were sprayed onto the back surface of the substrate at approximately the same time as the application of the droplets. In addition, droplets of the cleaning liquid 11 applied to the coated film 2 were observed from the rear surface, and it was confirmed that the maximum diameter of the droplets was 1.0 mm.
  • TSK-56 manufactured by Kansai Electric Heating Co., Ltd.
  • the temperature of the coated film 2 was measured using a radiation thermometer from the rear surface of the coated film 2 immediately after the droplets were applied and the hot air was blown, it was 40°C.
  • the maximum conveying speed at which both the curable silicone resin and the water-soluble polyvinyl alcohol resin film of the release component could be peeled off was 50 m. /min.
  • the stripping device 401 includes a water tank 414 in which water as the cleaning liquid 11 is stored, a drain tank 415 adjacent to the water tank 414 so that the liquid surface of the water tank 414 overflows and is drained, and a filter for separating the peeled film contained in the waste water.
  • a filter 416 is provided.
  • the coated film 2 is set in the unwinding device 404 of the peeling device 401, transported to the water tank 414 by the driving device 409, brought into contact with water (normal temperature: 20° C.) as the cleaning liquid 11, and then peeled by the peeling device 407 to SUS630.
  • the cleaning liquid 11 and the coating were removed together by contacting a plate with a sharp edge, and the substrate film 3 from which the coating was removed was wound up by the winding device 405 .
  • the amount of new cleaning liquid 11 to be supplied into the water tank 414 the required minimum liquid amount was confirmed while checking the peeling state of the film.
  • the water-soluble polyvinyl alcohol resin contained in the film elutes and the concentration of the solution increases, the dissolution of the polyvinyl alcohol resin decreases. It was necessary to feed 25000 cm 3 of the cleaning liquid 11 per unit area (1 m 2 ) of the attached film.
  • the transport speed at which both the film of the curable silicone resin and the water-soluble polyvinyl alcohol resin, which are release components, could be peeled off was 50 m at the maximum. /min.
  • peeling evaluation confirmed that part of the curable silicone resin and polyvinyl alcohol resin films remained.
  • the peeling device 501 includes a pressure device 512 and a discharge head 506 for discharging water, which is the cleaning liquid 11, at high pressure.
  • the operation of Example 1 was carried out except that the pressure device 512 and the ejection head 506 were used in place of the spray nozzle 6 of Example 1, the cleaning liquid 11 was high-pressure water, and the conveying speed was limited to 50 m/min.
  • High-pressure water normal temperature: 20° C.
  • the cleaning liquid 11 ejected at high pressure is continuously ejected in a large amount to maintain the high pressure, even if it adheres to the film 2 with the coating, it does not form droplets at all, and it spreads from the entire surface of the film 2 with the coating. It was dripping. Furthermore, a large amount of the washing water 11 rebounded from the surface of the coated film 2 accumulated in the booth 8 .
  • the temperature of the coated film 2 was measured using a radiation thermometer from the rear surface of the coated film 2 immediately after the cleaning liquid 11 was applied, it was 20°C.
  • the base film 3 from which the film was peeled off after being wound up by the winding device 5 was sampled, and the amount of high-pressure water capable of peeling both the curable silicone resin and the water-soluble polyvinyl alcohol resin film of the release component was determined. As a result, it was found that 800 cm 3 of high-pressure water was required per unit area of 1.0 m 2 of the coated film.
  • the amount of high-pressure water is calculated by recovering the film containing the cleaning liquid 11 stripped by the stripping device 7 and the cleaning liquid 11 accumulated in the booth, and calculating the amount of the cleaning liquid 11 from the weight measurement result. It was derived by converting per unit area.
  • the peeling device 601 includes a steam generator 612 and a discharge head 606 for discharging water, which is the cleaning liquid 11, in a steam state.
  • the operation of Example 1 was carried out except that the steam generator 612 and the discharge head 606 were used instead of the spray nozzle 6 of Example 1 to steam the cleaning liquid 11 and the conveying speed was limited to 30 m/min.
  • Steam was discharged toward the coating surface of the coated film 2 from a discharge head ( ⁇ 10 opening nozzle) using a steam generator (BOILER.V manufactured by Nippon Dennetsu Co., Ltd.).
  • the discharged steam is a large amount of steam having a discharge temperature of 100° C. and a discharge pressure of 0.4 MPa, even if it adheres to the coated film 2, it does not retain the shape of droplets and immediately joins many droplets. It was confirmed that droplets of more than 1 mm were formed and flowed down from the surface of the film 2 with the coating. It was also confirmed that there was a portion where the cleaning liquid 11 did not remain at the location where droplets of more than 1 mm flowed out. Furthermore, a large amount of the washing liquid 11 that fell from the surface of the coated film 2 accumulated in the booth 8 . When the amount of the cleaning liquid 11 used was measured, it was confirmed to be 200 cm 3 per unit area of 1.0 m 2 of the coated film 2 .
  • the amount of the cleaning liquid 11 used in the steam is calculated by recovering the film containing the cleaning liquid 11 stripped by the stripping device and the cleaning liquid 11 accumulated in the booth, and calculating the amount of the cleaning liquid 11 from the weight measurement results. It was derived by converting per unit area of the film 2 .
  • the temperature of the coated film 2 was measured using a radiation thermometer from the rear surface of the coated film 2 immediately after the cleaning liquid 11 was applied, and it was 85°C. Similarly, when the film temperature of the portion where droplets of more than 1 mm flowed down was measured, it was 50°C.
  • Examples 1 to 4 of the present invention are compared with Comparative Example 1 using a conventional peeling device 401, Comparative Example 2 using a high-pressure cleaning liquid in a peeling device 501, and Comparative Example 3 using steam injection in a peeling device 601.
  • the amount of cleaning liquid used per unit area could be greatly reduced. Therefore, in Examples 1 to 4, the amount of wastewater can be greatly reduced, so the environmental load can be reduced, and the cleaning cost can be kept low.
  • Comparative Example 3 it was confirmed that the droplets flowed down from the surface of the film with the coating, and a part of the coating remained at the place where the droplets flowed down. It could be demonstrated that it is important to retain the droplets on the surface of the coated film as in Examples 1-4.
  • Example 2 by heating the temperature of the cleaning solution to 50°C, the conveying speed at which the coating of the coated film can be peeled off can be increased compared to Example 1 in which the temperature of the cleaning solution is 20°C. The coating could be peeled off even at a conveying speed of 50 m/min.
  • Example 3 by heating the washing liquid to 90° C., the conveying speed for peeling off the coated film could be further increased, and the peeling of the film was possible even at a conveying speed of 100 m/min.
  • Example 2 the temperature of the coated film was raised to 45°C by heating the cleaning liquid to 50°C.
  • the conveying speed at which the coating of the film with the coating could be peeled was 50 m/min at the maximum, which was the same.
  • the coating can be peeled off compared to the case where the temperature of the coated film of Example 1 is normal temperature (20°C). Conveyance speed has been increased.
  • the peeling method and peeling apparatus for a coated film of the present invention can be suitably used for reusing a film having a release layer.
  • the coated film that can be applied to the peeling method and the peeling device of the coated film of the present invention is not limited to a film having a coating containing a water-soluble resin on one side of the base film, and has a coating containing a readily soluble resin layer. Any recyclable resin film, paper film, or metal film may be used.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)
  • Cleaning In General (AREA)
  • Cleaning Or Drying Semiconductors (AREA)
PCT/JP2022/003837 2021-03-12 2022-02-01 被膜付きフィルムからの被膜の剥離方法および被膜の剥離装置 Ceased WO2022190713A1 (ja)

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EP22766679.9A EP4306223A4 (en) 2021-03-12 2022-02-01 METHOD FOR SEPARATING A COATING FROM A FILM WITH A COATING, AND APPARATUS FOR SEPARATING A COATING
US18/279,956 US20240149581A1 (en) 2021-03-12 2022-02-01 Method for removing coating from coated film and equipment for removing coating
CN202280010979.3A CN116783006A (zh) 2021-03-12 2022-02-01 从带被膜的薄膜剥离被膜的方法以及被膜的剥离装置
KR1020237026924A KR20230154802A (ko) 2021-03-12 2022-02-01 피막 부착 필름으로부터의 피막의 박리 방법 및 피막의박리 장치
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WO2024247486A1 (ja) 2023-05-31 2024-12-05 東レ株式会社 被膜剥離装置および被膜剥離方法
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WO2025205428A1 (ja) * 2024-03-29 2025-10-02 リンテック株式会社 コーティング層の除去装置及びコーティング層の除去方法
JP7768616B1 (ja) * 2025-04-04 2025-11-12 株式会社Ｐｎｔｅｃソリューション 廃棄プラスティックフィルムの残存層剥離装置及び当該装置を用いた廃棄プラスティックフィルムの再生装置並びにこれらの方法
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JP7768616B1 (ja) * 2025-04-04 2025-11-12 株式会社Ｐｎｔｅｃソリューション 廃棄プラスティックフィルムの残存層剥離装置及び当該装置を用いた廃棄プラスティックフィルムの再生装置並びにこれらの方法

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