WO2019003809A1 - フィルムの処理方法及びフィルムの製造方法 - Google Patents
フィルムの処理方法及びフィルムの製造方法 Download PDFInfo
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- WO2019003809A1 WO2019003809A1 PCT/JP2018/021377 JP2018021377W WO2019003809A1 WO 2019003809 A1 WO2019003809 A1 WO 2019003809A1 JP 2018021377 W JP2018021377 W JP 2018021377W WO 2019003809 A1 WO2019003809 A1 WO 2019003809A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
- H01J37/3402—Gas-filled discharge tubes operating with cathodic sputtering using supplementary magnetic fields
- H01J37/3405—Magnetron sputtering
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/02—Pretreatment of the material to be coated
- C23C14/021—Cleaning or etching treatments
- C23C14/022—Cleaning or etching treatments by means of bombardment with energetic particles or radiation
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
- B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
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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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/56—Apparatus specially adapted for continuous coating; Arrangements for maintaining the vacuum, e.g. vacuum locks
- C23C14/562—Apparatus specially adapted for continuous coating; Arrangements for maintaining the vacuum, e.g. vacuum locks for coating elongated substrates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32532—Electrodes
- H01J37/32568—Relative arrangement or disposition of electrodes; moving means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32733—Means for moving the material to be treated
- H01J37/32752—Means for moving the material to be treated for moving the material across the discharge
- H01J37/32761—Continuous moving
- H01J37/3277—Continuous moving of continuous material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
- H01J37/3411—Constructional aspects of the reactor
- H01J37/345—Magnet arrangements in particular for cathodic sputtering apparatus
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/20—Positioning, supporting, modifying or maintaining the physical state of objects being observed or treated
- H01J2237/202—Movement
- H01J2237/20221—Translation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/32—Processing objects by plasma generation
- H01J2237/33—Processing objects by plasma generation characterised by the type of processing
- H01J2237/332—Coating
Definitions
- the present invention relates to a method of processing a film and a method of manufacturing a film.
- Patent Document 1 discloses an example of a method of producing a vapor deposition film.
- plasma treatment using a discharge electrode of a planar magnetron system is performed while continuously moving the base film as pretreatment for vapor deposition.
- the magnetron electrode side is the cathode (cathode) and many ions and electrons such as argon (Ar) are mixed near the cathode electrode, so the plasma density becomes high on the cathode electrode side.
- the plasma density decreases with distance from the cathode electrode. For this reason, there are cases where it is not possible to efficiently perform predetermined processing (plasma processing) on the film.
- the cathode electrode is always the cathode (cathode) by the direct current system, and the charge is concentrated on the insulating film or the like deposited on the non-erosion portion of the surface of the cathode electrode. From this, there is also a possibility that abnormal discharge such as arc discharge may occur, and there is a possibility that the plasma processing operation becomes unstable particularly when large power is supplied or discharge for a long time.
- An object of the present invention is to provide a method of processing a film capable of stably performing a plasma processing operation, as well as a method of manufacturing a film, while improving the throughput of the film.
- the present invention relates, as one aspect thereof, to a method of treating a film
- the method of treating a film includes a first discharge electrode unit and a second discharge electrode unit each having a magnet forming a magnetic field, and a first discharge electrode unit
- Preparing a plasma processing apparatus comprising an AC power supply electrically connected to the second discharge electrode unit and capable of alternately switching the polarity of the first discharge electrode unit and the second discharge electrode unit;
- High frequency power is supplied to the discharge electrode unit and the second discharge electrode unit to generate plasma in the plasma processing apparatus, and the film to be treated is transported through the plasma processing apparatus, and the surface treatment of the film by the plasma
- plasma is generated while alternately switching the polarity of the first discharge electrode unit and the second discharge electrode unit by high frequency power supplied from an AC power supply (for example, either a sine wave or a square wave may be used).
- an AC power supply for example, either a sine wave or a square wave may be used.
- a plasma is generated between the first discharge electrode unit and the second discharge electrode unit, and the magnetic field generated by the magnet causes the plasma to be generated on the bridge to approach the film. That is, according to the above processing method, the reduction of the plasma density in the vicinity of the film can be suppressed as compared with the direct current method.
- the frequency of the high frequency power may be between 1 kHz and 400 kHz, and the frequency of the high frequency power may be between 10 kHz and 100 kHz.
- the switching of the polarity of the first discharge electrode unit and the second discharge electrode unit is suitably performed, the charge up in each discharge electrode unit is suitably alleviated. Therefore, large power can be input without generating abnormal discharge such as arc discharge.
- each of the first discharge electrode unit and the second discharge electrode unit is configured to include a flat plate electrode, and the first discharge electrode unit and the second discharge electrode unit are disposed in parallel. It is also good.
- a flat plate (so-called planar) magnetron plasma processing apparatus can be used, the apparatus configuration can be easily simplified. Further, since the film to be processed is processed in a flat state, more uniform processing can be realized. In addition, processing can be performed more efficiently because the film is exposed to the plasma for a longer time than being transported and processed on rolls.
- a magnetron plasma processing apparatus on the cylindrical side may be used instead of the flat-plate type magnetron plasma processing apparatus.
- the first discharge electrode unit and the second discharge electrode unit may be configured to include cylindrical electrodes.
- the electrode width in the film width direction used for plasma processing and the plasma processing intensity Epd per processing speed are 100 [W ⁇ s / m 2 ] or more, preferably 200 [W ⁇ s / m]. 2 )
- the AC power supply may supply predetermined power to the first discharge electrode unit and the second discharge electrode unit so as to achieve the above. In this case, by supplying higher power to each discharge electrode unit, the number of ions in the plasma irradiated to the film surface is increased, and the processing of the film to be processed can be performed more reliably.
- the plasma processing intensity Epd here can be expressed by the following equation (1) or (2), and the processing power [W] is the power from the AC power supply, and the electrode width in the film flow direction [m] / electrode The area [m 2 ] is the electrode width / electrode area of the discharge electrode unit, and the treatment speed [m / s] is the transport speed of the film to be treated.
- the present invention relates, in another aspect, to a method of producing a film, the method of producing a film comprising the steps of performing pretreatment of deposition on the film by any of the methods of treating a film described above, and before the deposition. Forming a deposition layer on the treated surface of the film subjected to the treatment step.
- a step of pre-treating lamination of another layer on the film by any of the above-described methods of treating a film, and a film having the pretreatment step of the lamination are examples of a method for producing a film.
- the adhesion between the film and the deposited layer or other layers is usually measured according to JIS K 6854-2 (180 degree peeling) and JIS K 6854-3 (T type peeling). It is preferable that it is 3 N / 15 mm or more in condition (Dry) of 1 and 1 N / 15 mm or more in condition (Wet) with water.
- the present invention relates, as yet another aspect, to a film processing apparatus, and the processing apparatus is a plasma processing apparatus used for the film processing method described in any of the above, wherein the film to be transported is a plasma processing apparatus
- a first discharge electrode unit and a second discharge electrode unit each having a box having an inlet and an outlet for entering and leaving the box, and a magnet disposed in the box and forming a magnetic field, a first discharge electrode unit, and a first discharge electrode unit
- An AC power supply electrically connected to the two discharge electrode units and capable of alternately switching the polarity of the first discharge electrode unit and the second discharge electrode unit.
- the processing apparatus including the vapor deposition apparatus and the like can be miniaturized, and the operation thereof can be stabilized.
- This box may be housed in a vacuum chamber, or the box itself may have the function of a vacuum chamber. That is, the exhaust system may be installed in a box in which the first discharge electrode unit and the second discharge electrode unit are stored, and the pressure may be set separately from the other rooms.
- each of the first discharge electrode unit and the second discharge electrode unit is configured to include a flat plate electrode, and the first discharge electrode unit and the second discharge electrode unit are disposed in parallel. Good.
- a flat plate type magnetron plasma processing apparatus can be used, the apparatus configuration can be easily simplified.
- the present invention it is possible to provide a method of processing a film capable of stably performing a plasma processing operation, and a method of manufacturing a film, as well as improving the throughput of the film.
- FIG. 1 is a schematic cross-sectional view schematically showing a film processing apparatus (plasma processing apparatus) used in a film processing method according to an embodiment of the present invention, and FIGS. 1 (a) and (b) are switched It shows the state.
- FIG. 2 is a view showing an example of a frequency signal of high frequency power supplied to each discharge electrode unit of the film processing apparatus shown in FIG.
- FIGS. 3 (a), (b) and (c) are cross-sectional views showing an example of a laminate film including a vapor deposition layer, which is produced by the film processing apparatus shown in FIG.
- FIGS. 4 (a) and 4 (b) are cross-sectional views showing an example of a laminate film on which other layers are laminated, which is produced by the film processing apparatus shown in FIG.
- FIG. 1 is a schematic cross section which shows typically the film processing apparatus (plasma processing apparatus) used for the processing method of the film which concerns on one Embodiment of this invention.
- a film processing apparatus 1 used in the present embodiment is, for example, a magnetron plasma processing apparatus which is disposed in a vacuum apparatus and discharges each other by applying an AC voltage to two magnetrons and a cathode. It is.
- the film processing apparatus 1 is electrically connected to the box 2, the first discharge electrode unit 3 and the second discharge electrode unit 4 arranged in parallel in the box 2, and the first discharge electrode unit 3 and the second discharge electrode unit 4. And an AC power supply 5 connected thereto.
- the film F to be processed is inserted into the film processing apparatus 1 and a predetermined surface treatment is performed by the plasma P generated inside the apparatus.
- a magnet S pole, N pole
- a magnet is disposed on the back side of the electrode to form a magnetic field G, high density plasma is generated, and ion etching etc. (amorphization of substrate surface or functional group Change (including change).
- Each electrode of the first discharge electrode unit 3 and the second discharge electrode unit 4 is referred to as a direction (TD, "film width direction") orthogonal to the flow direction (MD, left-right direction in FIG. 1) of the film F. It is arranged in parallel in the direction orthogonal to the paper surface of 1). And, by designing the electrode width in the film width direction to be equal to or more than the width of the film F, it is possible to uniformly process the entire surface of the film.
- the box 2 is a housing disposed in the vacuum apparatus as described above, and the inside thereof is in a predetermined depressurized state.
- the box 2 is provided with an inlet 2 a and an outlet 2 b so that the film F to be subjected to the surface treatment with the plasma P can be inserted and unloaded.
- Each of the first discharge electrode unit 3 and the second discharge electrode unit 4 is an electrode unit of a flat plate type (planar type) magnetron plasma processing apparatus, and flat plate electrodes 3a and 4a (flat plate electrodes) and a flat plate electrode It arrange
- the flat electrodes 3a and 4a can be made of, for example, stainless steel, but are made of a metal such as aluminum (Al), titanium (Ti), niobium (Nb), tantalum (Ta) or zirconium (Zr).
- Each of the magnets 3b and 4b is composed of a plurality of permanent magnets (for example, neodymium magnets etc.) in which an S pole and an N pole form a pair, and the magnetization directions of adjacent magnets are different.
- a magnetic field G is formed in the space by such magnets 3 b and 4 b, and the first discharge electrode unit 3 and the second discharge electrode unit 4 can generate high density plasma.
- the first discharge electrode unit 3 and the second discharge electrode unit 4 having such a configuration are electrically connected to both ends of the AC power supply 5 respectively.
- the magnetic field G formed by the magnets 3 b and 4 b is preferably formed in a ring shape (donut shape) in a plan view (when viewed from the upper side in the drawing).
- the first discharge electrode unit 3 and the second discharge electrode unit 4 will be described later in detail, but when one functions as a cathode, the other functions as an anode by switching by high frequency power supplied from the AC power supply 5 Configured
- the first discharge electrode unit 3 and the second discharge electrode unit 4 having such a configuration are electrically connected to the AC power supply 5 in a state in which neither is grounded.
- the AC power supply 5 is a plasma generation power supply for supplying predetermined high frequency power to the first discharge electrode unit 3 and the second discharge electrode unit 4.
- the AC power supply 5 is a plasma generation power supply for supplying predetermined high frequency power to the first discharge electrode unit 3 and the second discharge electrode unit 4.
- the high frequency power supplied from the AC power supply 5 is, for example, 3 kW or more. Further, in the film processing apparatus 1, the AC power supply is performed such that the electrode width (electrode length in the flow direction) used for plasma processing and the processing intensity Epd per processing speed become 100 [W ⁇ s / m 2 ] or more. 5 may supply predetermined electric power to the first discharge electrode unit 3 and the second discharge electrode unit 4.
- Electrode area [m 2 ] is the electrode width / electrode area of the discharge electrode unit
- processing speed [m / s] is the transport speed of the film to be processed.
- the electrode area in the above formulas (1) and (2) means the area of the cathode electrode, but the cathode electrode in the present invention is alternately replaced by the electrodes 3a and 4a for the application of an alternating voltage. , The area of the two electrodes plus the area divided by 2, equal to the area of one of the same shape.
- the frequency of the high frequency power supplied from the AC power supply 5 is, for example, a frequency of 1 kHz or more and 400 kHz or less, more preferably 10 kHz or more and 100 kHz or less.
- a large voltage drop occurs on the magnetron electrode surface side and becomes smaller on the surface (the lower surface in the drawing) side of the film F, but according to the film processing apparatus 1, higher power can be obtained by the polarity switching process by alternating current.
- Each discharge electrode unit can be supplied.
- a plasma is generated in a bridge shape so as to approach the film F by the magnetic field G generated by the magnet.
- the film processing apparatus 1 can strengthen the intensity
- the film F to be surface-treated by the film processing apparatus 1 having the above-mentioned configuration is not particularly limited, and various known materials can be used.
- polyethylene terephthalate (PET) or polyethylene naphthalate (PEN) Etc. can be exemplified.
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- a polyolefin film such as polyethylene (PE) or polypropylene (PP), a polyamide film such as nylon-6 or nylon-66, a polystyrene film, a polycarbonate film, a polyimide film, a cellulose film or the like may be used.
- the film F may be a stretched film or an unstretched film.
- the surface of the film F may be provided with surface treatment such as corona treatment, or the film F may contain various additives and stabilizers such as an antistatic agent, an ultraviolet light inhibitor, a plasticizer, and a lubricant.
- the thickness of the film F is not particularly limited, but in consideration of processability etc., for example, a range of 6 ⁇ m to 100 ⁇ m is preferable.
- a film processing apparatus 1 having the above-described apparatus configuration is prepared as a processing method.
- one or more inert gases consisting of, for example, argon (Ar), helium (He) or nitrogen (N) are introduced into the box 2 of the film processing apparatus 1.
- argon gas which is a rare gas.
- a highly reactive gas such as oxygen (O 2 ) may be introduced.
- the pressure in the box 2 is adjusted to be, for example, 0.1 Pa or more and less than 50 Pa.
- the pressure is 0.1 Pa or less, the discharge is difficult to be stabilized and stable surface treatment can not be performed.
- the pressure is 50 Pa or more, the self bias voltage is lowered and sufficient effect by plasma P is obtained.
- the pressure in the box 2 is preferably in the range of 1 Pa to 25 Pa because the effect of the magnetic induction by the magnets 3 b and 4 b of the respective electrodes is slightly weakened in the region where the pressure in the box 2 is 40 Pa or more.
- predetermined high-frequency power is supplied from the AC power supply 5 functioning as a plasma generation power supply to the first discharge electrode unit 3 and the second Supply to the discharge electrode unit 4. That is, an alternating voltage is applied to the first discharge electrode unit 3 and the second discharge electrode unit 4.
- a predetermined cycle for example, 40 kHz.
- the frequency of the high frequency power is, for example, preferably in the range of 1 kHz to 400 kHz, more preferably 10 kHz to 100 kHz. For example, as shown in FIG.
- the film F to be treated is treated as the first discharge electrode unit 3 while continuing the switching of the polarity. And transport the sheet so as to pass above the second discharge electrode unit 4. At this time, the surface on the side where the surface treatment is to be performed is directed to the first discharge electrode unit 3 and the second discharge electrode unit 4 side.
- the distance between the first discharge electrode unit 3 and the second discharge electrode unit 4 and the film F is preferably in the range of 5 mm to 100 mm, and more preferably in the range of 10 mm to 50 mm, The film F is transported in the box 2 so as to be in the range.
- the film F passing through the inside of the box 2 is sent out at a predetermined transport speed, and the plasma processing is performed on the processing surface of the film F.
- a conveyance speed (second speed) of the film F although 2 [m / sec] or more and 20 [m / sec] or less can be illustrated, for example, it is not limited to this.
- the crystal structure of the surface of the film F is broken and amorphized, deposition pretreatment (adhesion treatment) is performed, or lamination with other films (including bonding etc.) Pretreatment (adhesion treatment) can be performed.
- the above-described plasma processing may be repeated on the film F (for example, the same processing may be repeated two to three times).
- the state of the C—C bond which is the film modification effect in the method of processing the film F according to one embodiment of the present invention, can be seen from the spectrum of X-ray photoelectron spectroscopy measurement of the film surface.
- the film F is a polyethylene terephthalate film
- the above-described treatment is performed such that the half width of the C—C bond obtained from C1s waveform separation in X-ray photoelectron spectroscopy measurement of the film surface is in the range of 1.255 eV to 1.585 eV.
- measurement conditions in the X-ray photoelectron spectroscopy measurement are that the X-ray source is MgK ⁇ and the output is 100 W).
- the half width of the C—C bond is 1.255 eV or more and 1.585 eV or less can indicate that sufficient modification is performed and the film surface is processed without deterioration. Further, the above-described plasma treatment may be further performed on the corona-treated surface.
- the film is subjected to the pretreatment for film deposition using a film deposition method such as a vacuum deposition method, a sputtering method, an ion plating method, or a chemical vapor deposition method (CVD).
- a thin film layer is formed on the treated surface of F. It is preferable to use a vacuum evaporation method in consideration of productivity and the like.
- a transparent gas barrier layer made of aluminum oxide or silicon oxide may be formed.
- the thickness of the thin film layer which is the gas barrier layer can be varied depending on the application and configuration, but for example, it is preferable to be in the range of 5 nm to 300 nm.
- the film thickness is less than 5 nm, the film thickness is not sufficient and the function as a gas barrier layer can not be sufficiently achieved. On the other hand, when the film thickness exceeds 300 nm, flexibility can not be maintained, and the thin film tends to be cracked. In addition, productivity also deteriorates.
- a film thickness of 10 nm to 200 nm is more preferable in consideration of performance and productivity.
- the processing may be performed in-line (within the same system) to increase the productivity by providing the chamber for performing the vapor deposition process continuously or integrally with the film processing apparatus 1 described above.
- a gas barrier coating layer may be formed on the vapor deposition layer, and a protective layer may be further provided thereon.
- FIG. 3A An example of a laminated film formed by performing such vapor deposition treatment is shown in FIG.
- the adhesion-treated layer 13 is formed on the corona-treated layer 12 formed on one side of the PET film 11 by the above-described plasma treatment, to form a film F1.
- the vapor deposition layer 14 (for example, aluminum oxide layer etc.) is formed on the adhesion process layer 13, and it can be set as the film F1a which has a vapor deposition layer.
- FIG. 3A the adhesion-treated layer 13 is formed on the corona-treated layer 12 formed on one side of the PET film 11 by the above-described plasma treatment, to form a film F1.
- the vapor deposition layer 14 for example, aluminum oxide layer etc.
- a gas barrier coating layer 15, a first surface layer 16 (for example, a nylon layer or the like) and a second surface layer 17 (for example, a CPP (Cast PolyPropylene) layer) are further formed on the vapor deposition layer 14 of the film F1a. Etc.) may be sequentially laminated to form a laminated film F1b.
- the first surface layer 16 may have, for example, a thickness of 10 to 50 ⁇ m.
- the second surface layer 17 may be made of non-oriented polypropylene (CPP), but low density polyethylene (LDPE), linear low density polyethylene (LLDPE), ethylene vinyl acetate copolymer (EVA), ionomer, acrylic You may be comprised from copolymer resin etc.
- processing is performed such that the half width of the C—C bond determined from C1s waveform separation in X-ray photoelectron spectroscopy measurement of the film surface is in the range of 1.255 eV to 1.585 eV. It is preferable in order to improve the adhesiveness with a vapor deposition layer by a modification effect, and to maintain the barrier property at the time of using as a barrier film. Furthermore, the film may be treated such that the half width of the C—C bond determined from C1s waveform separation in X-ray photoelectron spectroscopy measurement of the film surface is in the range of 1.255 eV to 1.560 eV.
- thermoplastic resin layer when performing the process (including bonding) which laminates
- FIG. 4A An example of a laminated film formed by performing such pretreatment of lamination is shown in FIG.
- the adhesion treatment layer 23 is formed on the opposite side to the corona treatment layer 22 formed on one side of the PET film 21 by the above-mentioned plasma treatment, and is made a film F2. .
- thermoplastic resin layer 24 extruded from the extruder can be laminated
- the vapor deposition layer 14 as shown in FIG. 3 may be separately provided on the opposite side (corona treated layer 22 side) to the surface subjected to the lamination process, or the vapor deposition layer as a barrier layer and the substrate A reactive ion etching treatment layer or an anchor coat layer may be provided between the PET film and the PET film to be laminated.
- the corona treatment layer 22 is provided on the side opposite to the side on which the lamination process has been performed, but it may not be necessary.
- thermoplastic resins such as polyolefin films, such as polyethylene and polypropylene
- thermoplastic resins such as adhesive polyolefin which carried out graft polymerization, such as maleic anhydride, for example, and introduced a functional group into polyolefin may be used.
- the frequency of high frequency power can be set to 1 kHz or more and 400 kHz or less, preferably 10 kHz or more and 100 kHz or less.
- charge up in each discharge electrode unit can be suitably alleviated. Since the charge up is alleviated, large power can be supplied without generating abnormal discharge such as arc discharge.
- each of the first discharge electrode unit and the second discharge electrode unit is configured to include a flat plate electrode, and the first discharge electrode unit and the second discharge electrode unit are arranged in parallel.
- the alternating current power supply is a power supply for which the electrode width in the film width direction used for plasma processing as high frequency power and the processing intensity Epd per processing speed are 100 [W ⁇ s / m 2 ] or more. It is also possible to supply the discharge electrode unit and the second discharge electrode unit. In this case, since the voltage drop on the film surface side can be further increased, it is possible to more reliably perform the plasma processing on the film to be processed.
- the plasma processing apparatus used for the processing method of this film alternates the polarity of the first discharge electrode unit and the second discharge electrode unit, and the first discharge electrode unit and the second discharge electrode unit each having a magnet forming a magnetic field. And a switchable alternating current power supply.
- the processing apparatus including the vapor deposition apparatus and the like can be miniaturized, and the operation thereof can be stabilized.
- each of the first discharge electrode unit and the second discharge electrode unit is configured to include a flat plate electrode, and the first discharge electrode unit and the second discharge electrode unit are arranged in parallel. Therefore, a flat plate type magnetron plasma processing apparatus can be used, and the apparatus configuration can be easily simplified.
- the first discharge electrode unit 3 and the second discharge electrode unit 4 including flat electrodes are used, but instead, a cylindrical electrode (rotary cathode) is included 2
- Two discharge electrode units may be used.
- the first discharge electrode unit 3 and the second discharge electrode unit 4 instead of the flat plate electrodes 3 a and 4 a, two cylindrical electrodes are disposed so as to cover the magnet.
- the above-described film processing method can be realized even by using a magnetron plasma processing apparatus using such a cylindrical electrode. In this case, it is apparent that the cylindrical height of the electrode portion corresponds to the electrode width in the film width direction.
- Example 1 First, a flat plate type magnetron plasma processing apparatus shown in FIG. 1 was prepared, and a PET film to be processed was prepared. One side of the PET film was subjected to corona treatment.
- argon (Ar) gas was introduced at a flow rate of 250 [sccm] into a magnetron plasma processing apparatus having an AC power supply, and a predetermined pressure reduction was performed.
- the frequency of the high frequency power from the AC power supply was set to 40 kHz to generate plasma for plasma processing.
- the above-mentioned PET film is inserted and transported in the magnetron plasma processing apparatus in which the plasma is generated, with the surface opposite to the surface subjected to the corona processing facing the discharge electrode unit side, plasma
- the adhesion processing of the said surface was performed by processing.
- the conveyance speed of the PET film was 15 [m / s].
- the processing intensity index Epd of plasma used here was 219 [W ⁇ s / m 2 ].
- Example 2 In Example 2, the same PET film as in Example 1 is used, the film transport speed is changed to 2 m / s, and the plasma processing intensity index Epd is 492 [W ⁇ s / m 2 ]. The power supply by an AC power supply was set to perform the adhesion treatment of the PET film. The other conditions and the like in Example 2 were the same as in Example 1.
- Example 3 In Example 3, the same PET film as in Example 1 was used, and the flow rate of introduced argon gas was changed to 5000 [sccm] to perform the adhesion treatment of the PET film. The other conditions and the like in Example 3 were the same as in Example 1.
- the processing intensity index Epd of plasma is 219 [W ⁇ s / m 2 ] as in the first embodiment.
- Example 4 In Example 4, the same PET film as in Example 1 is used, the film transport speed is changed to 4 m / s, and the plasma processing intensity index Epd is 2869 [W ⁇ s / m 2 ]. The power from the AC power supply was set, and the PET film adhesion treatment was performed. The other conditions and the like in Example 4 were the same as in Example 1.
- Example 5 In Example 5, the same PET film as in Example 1 is used, the film transport speed is changed to 2 m / s, and the plasma processing intensity index Epd is 5738 [W ⁇ s / m 2 ]. The power from the AC power supply was set, and the PET film adhesion treatment was performed. The other conditions and the like in Example 5 were the same as in Example 1.
- the FWHM value of the treated surface of the film of Example 1 is 1.278 eV
- the FWHM value of the treated surface of the film of Example 2 is 1.356 eV
- the film of Example 3 The FWHM value of the treated surface is 1.269 [eV]
- the FWHM value of the treated surface of the film of Example 4 is 1.498 [eV]
- the FWHM value of the treated surface of the film of Example 5 Is 1.522 [eV], and it has been confirmed that all the films have adhesion within the above-mentioned preferable range.
- Comparative Example 1-1 polyethylene is extruded with an extruder so that the thickness is 15 ⁇ m on a corona-treated surface of a normal PET film (only corona treatment is carried out), and an LLDPE film having a thickness of 40 ⁇ m is formed on the PE surface.
- the actual degree of adhesion between each PET film and the PE layer when sandwich lamination was performed was measured.
- Comparative Example 1-2 polyethylene is extrusion-molded by an extruder so that the thickness is 15 ⁇ m on the surface (untreated surface) opposite to the corona-treated surface of a normal PET film (concrete treated only). The actual adhesion between each PET film and the PE layer was measured when sandwich laminating an LLDPE film having a thickness of 40 ⁇ m on the PE surface.
- the degree of adhesion was measured according to JIS K 6854-2 (180 degree peeling) and JIS K 6854-3 (T type peeling). The test was conducted under two measurement conditions: normal conditions (Dry) and conditions with water (Wet). Under the condition (Wet), the peeling test was conducted while sufficiently adding water to the peeling point. The results are shown in Table 2 below.
- the adhesion (DRY) was at least 6.0 [N / 15 mm].
- the adhesion becomes 1.2 [N / 15 mm] or more even in the case of Wet which is a more severe condition.
- the adhesion (DRY) is at most 2.4 [N / 15 mm] at maximum, and the adhesion (Wet) is at most 0.4 [N] / 15 mm], and the adhesion was very low.
- an adhesive resin and polyethylene are coextrusion molded with an extruder to a thickness of 20 ⁇ m so that the thickness is 10 ⁇ m on a corona-treated surface of a normal PET film (concrete treated only). Furthermore, the actual adhesion between the PET film and the adhesive resin layer was measured when sandwich laminating an LLDPE film having a thickness of 30 ⁇ m on the PE surface.
- the adhesive resin and thickness are 20 ⁇ m so that the thickness is 10 ⁇ m on the surface (untreated surface) opposite to the corona-treated surface of a normal PET film (concrete treated only).
- the polyethylene was co-extruded with an extruder, and the actual adhesion between the PET film and the adhesive resin layer was measured when sandwich laminating an LLDPE film with a thickness of 30 ⁇ m on the PE surface.
- the degree of adhesion was measured according to JIS K 6854-2 (180 degree peeling) and JIS K 6854-3 (T type peeling). The test was conducted under two measurement conditions: normal conditions (Dry) and conditions with water (Wet). Under the condition (Wet), the peeling test was conducted while sufficiently adding water to the peeling point. The results are shown in Table 3 below.
- the adhesion (DRY) was 6.0 [N / 15 mm] It has been confirmed that the above is true. Further, in Examples 1 to 5, it was confirmed that the adhesion becomes 2.9 [N / 15 mm] or more even in the case of Wet which is a more severe condition. On the other hand, in the films according to Comparative Examples 1-1 and 1-2, the adhesion (DRY) is at most 2.5 [N / 15 mm] at maximum, and the adhesion (Wet) is at most 0.5 [N] / 15 mm], and the adhesion was very low.
- Example 6 Next, using the flat plate type magnetron plasma processing apparatus used for producing the film according to Example 1 and the like, a deposition layer was formed on a similar PET film (one of which was subjected to corona treatment).
- argon (Ar) gas is introduced at a flow rate of 250 [sccm] and oxygen (O 2 ) at a flow rate of 1000 [sccm] into the magnetron plasma processing apparatus having an AC power supply (total 1250 [sccm] introduction) and predetermined pressure reduction.
- the frequency of the high frequency power from the AC power supply was set to 40 [kHz] to generate plasma for plasma processing.
- the above-mentioned PET film is inserted and transported in the magnetron plasma processing apparatus in which the plasma is generated so that the surface subjected to corona treatment faces the discharge electrode unit side, and the surface is treated by plasma.
- Adhesion treatment was performed.
- the conveyance speed of the PET film was 2 [m / s].
- the processing intensity index Epd of plasma used here was 4098 [W ⁇ s / m 2 ].
- a film according to Example 6 was produced (for the layer configuration, refer to the film F1 in FIG. 3A).
- Example 7 In Example 7, using the same PET film as in Example 6, the film transport speed was changed to 4 m / s, and the PET film in Example 7 was subjected to adhesion treatment. The other conditions and the like in Example 7 were the same as in Example 6.
- the plasma processing intensity index Epd used here was 2049 [W ⁇ s / m 2 ].
- Example 8 In Example 8, using the same PET film as in Example 6, only argon gas at a flow rate of 250 [sccm] is introduced into the box (chamber) as an introduced gas, and a predetermined pressure reduction is performed. An adhesion treatment of the PET film was performed. The other conditions and the like in Example 8 were the same as in Example 6.
- the processing intensity index Epd of plasma used here was 4098 [W ⁇ s / m 2 ].
- Example 9 In Example 9, using the same PET film as in Example 6, only argon gas at a flow rate of 250 [sccm] is introduced into the box (chamber) as an introduced gas and at the same time a predetermined pressure reduction is carried out. The speed was changed to 4 [m / s], and adhesion treatment of the PET film concerning Example 9 was performed. The other conditions and the like in Example 9 were the same as in Example 6.
- the plasma processing intensity index Epd used here was 2049 [W ⁇ s / m 2 ].
- the FWHM value of the treated surface of the film of Example 6 is 1.330 eV
- the FWHM value of the treated surface of the film of Example 7 is 1.322 eV
- the value of the film of Example 8 is The FWHM value of the treated surface is 1.512 [eV]
- the FWHM value of the treated surface of the film of Example 9 is 1.410 [eV]
- all the films have the required range of adhesion. I was able to confirm that I was doing.
- a first surface layer (a 15 ⁇ m thick nylon layer) and a second surface layer (a 70 ⁇ m thick CPP) were laminated on the gas barrier coating layer by a dry lamination method (layer structure is See laminated film F1 b of FIG.
- a dry lamination method layer structure is See laminated film F1 b of FIG.
- aluminum oxide is vapor deposited by vacuum vapor deposition so that the thickness becomes 15 nm on the corona treated surface of a normal PET film (concrete treated only), and the vapor deposited layer on the PET film according to Comparative Example 2 was formed.
- a gas barrier coating layer was formed thereon in the same manner as in Examples 6-9.
- a first surface layer (a nylon layer of 15 ⁇ m in thickness) and a second surface layer (CPP of 70 ⁇ m in thickness) were further laminated thereon by a dry lamination method. Then, the actual degree of adhesion between the PET film and the aluminum oxide layer was measured.
- the degree of adhesion was measured according to JIS K 6854-2 (180 degree peeling) and JIS K 6854-3 (T type peeling).
- the test is stored in a room with a room temperature of 40 ° C and a humidity of 90% under two kinds of measurement conditions: normal conditions (Dry) and conditions with water (Wet), and changes over time ( Before retort treatment, immediately after retort treatment, one month later, and three months later). Under the condition (Wet), the peeling test was conducted while sufficiently adding water to the peeling point.
- a 4-way pouch (size 150 ⁇ 200 mm) was prepared and filled with 200 g of water, and treated with a hot water retort pot at 121 ° C. for 60 minutes.
- the measurement of the degree of adhesion immediately after retort treatment was carried out within 2 hours after the treatment. The results are shown in Table 5 below.
- the barrier properties (oxygen permeability) of the films according to Examples 6 to 9 described above and the films according to Comparative Example 2 were measured.
- the measurement was performed in accordance with JIS K 7126-2, the measuring apparatus was OX-TRAN 2/20 manufactured by MOCON, and the measurement conditions were 30 ° and 70% RH.
- the measurement results are shown in Table 6 below.
- the present invention can be applied to various film processing methods and film manufacturing methods.
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Abstract
Description
まず、図1に示す平板型のマグネトロンプラズマ処理装置を準備すると共に、加工対象となるフィルムであるPETフィルムを準備した。PETフィルムの一方の面にはコロナ処理が施されていた。
実施例2では、実施例1と同様のPETフィルムを用い、フィルムの搬送速度を2[m/s]に変更し、プラズマの処理強度指標Epdは492[W・s/m2]となるように交流電源による電力を設定し、PETフィルムの密着化処理を行った。実施例2におけるその他の条件等については実施例1と同様であった。
実施例3では、実施例1と同様のPETフィルムを用い、導入するアルゴンガスの流量を5000[sccm]に変更して、PETフィルムの密着化処理を行った。実施例3におけるその他の条件等については実施例1と同様であった。例えば、プラズマの処理強度指標Epdは、実施例1と同様に、219[W・s/m2]であった。
実施例4では、実施例1と同様のPETフィルムを用い、フィルムの搬送速度を4[m/s]に変更しプラズマの処理強度指標Epdは2869[W・s/m2]となるように交流電源による電力を設定し、PETフィルムの密着化処理を行った。実施例4におけるその他の条件等については実施例1と同様であった。
実施例5では、実施例1と同様のPETフィルムを用い、フィルムの搬送速度を2[m/秒]に変更しプラズマの処理強度指標Epdは5738[W・s/m2]となるように交流電源による電力を設定し、PETフィルムの密着化処理を行った。実施例5におけるその他の条件等については実施例1と同様であった。
実施例1~5のPETフィルムに2時間のプラズマ処理をした際に、アーク放電が発生しないことが確認できた。これは、交流電源による各放電電極の極性が交互に切り替えられたことによるものと考えられる。
次に、実施例1~5に係る処理済みPETフィルムの密着性の評価として、フィルム処理面の表面組成(XPS)の解析を行った。XPSによる解析としては、C-C結合ピークの半値幅(FWHM)を測定し、このFWHMの値が実用上好ましい範囲である1.255[eV]以上1.585[eV]以下の間であるか否かの評価を行った。FWHMの値は、より具体的には、X線光電子分光測定を行ったときに、C1s波形分離におけるC-C結合のピークの半値幅を示している。実施例1のフィルムの処理面のFWHMの値は1.278[eV]であり、実施例2のフィルムの処理面のFWHMの値は1.356[eV]であり、実施例3のフィルムの処理面のFWHMの値は1.269[eV]であり、実施例4のフィルムの処理面のFWHMの値は1.498[eV]であり、実施例5のフィルムの処理面のFWHMの値は1.522[eV]であり、いずれのフィルムも上述した好ましい範囲内の密着性を有していることが確認できた。比較例1として、通常のPETフィルム(コロナ処理のみ実施)では、コロナ処理面側のFWHMの値が1.208[eV]であり、コロナ処理を行っていない側の面のFWHMの値が1.172[eV]であり、上述した好ましい範囲内の下限である1.255[eV]よりもかなり低いものであった。
実施例1~5に係る密着化の処理済みPETフィルムの別の密着性の評価として、処理済みの各PETフィルムの処理面に、その厚みが15μmとなるようにポリエチレン(PE)をエクストルーダにより押出成形し、さらに、PE面に厚みが40μmのLLDPEフィルムをサンドイッチラミネーションを行った際の各PETフィルムとPE層との実際の密着度を測定した(層構成は、図4(b)のフィルムF2aを参照)。比較例1-1として、通常のPETフィルム(コロナ処理のみ実施)のコロナ処理面にその厚みが15μmとなるようにポリエチレンをエクストルーダにより押出成形し、さらに、PE面に厚みが40μmのLLDPEフィルムをサンドイッチラミネーションを行った際の各PETフィルムとPE層との実際の密着度を測定した。比較例1-2として、通常のPETフィルム(コロナ処理のみ実施)のコロナ処理面と反対側の面(未処理面)にその厚みが15μmとなるようにポリエチレンをエクストルーダにより押出成形し、さらに、PE面に厚みが40μmのLLDPEフィルムをサンドイッチラミネーションを行った際の各PETフィルムとPE層との実際の密着度を測定した。
実施例1~5に係る密着化の処理済みPETフィルムの更に別の密着性の評価として、処理済みの各PETフィルムの処理面に、厚みが10μmとなるように無水マレイン酸変性ポリエチレン系接着性樹脂(以後、「接着性樹脂」と記載)と厚みが20μmとなるようにポリエチレン(PE)をエクストルーダにより共押出成形するとともに、さらに、PE面に厚みが30μmのLLDPEフィルムをサンドイッチラミネーションを行った際の各PETフィルムと接着性樹脂層との実際の密着度を測定した。比較例1-1として、通常のPETフィルム(コロナ処理のみ実施)のコロナ処理面にその厚みが10μmとなるように接着性樹脂と厚みが20μmとなるようにポリエチレンをエクストルーダにより共押出成形するとともに、さらに、PE面に厚みが30μmのLLDPEフィルムをサンドイッチラミネーションを行った際のPETフィルムと接着性樹脂層との実際の密着度を測定した。比較例1-2として、通常のPETフィルム(コロナ処理のみ実施)のコロナ処理面と反対側の面(未処理面)にその厚みが10μmとなるように接着性樹脂と厚みが20μmとなるようにポリエチレンをエクストルーダにより共押出成形するとともに、さらに、PE面に厚みが30μmのLLDPEフィルムをサンドイッチラミネーションを行った際のPETフィルムと接着性樹脂層との実際の密着度を測定した。
次に、実施例1等に係るフィルムの作製に用いた平板型のマグネトロンプラズマ処理装置を用いて、同様のPETフィルム(一方にコロナ処理が実施)に蒸着層を形成することを行った。
実施例7では、実施例6と同様のPETフィルムを用い、フィルムの搬送速度を4[m/s]に変更して、実施例7に係るPETフィルムの密着化処理を行った。実施例7におけるその他の条件等については実施例6と同様であった。ここで用いられるプラズマの処理強度指標Epdは、2049[W・s/m2]であった。
実施例8では、実施例6と同様のPETフィルムを用い、導入ガスとして、流量250[sccm]のアルゴンガスのみをボックス(チャンバー)内に導入すると共に所定の減圧を行い、実施例8に係るPETフィルムの密着化処理を行った。実施例8におけるその他の条件等については実施例6と同様であった。ここで用いられるプラズマの処理強度指標Epdは、4098[W・s/m2]であった。
実施例9では、実施例6と同様のPETフィルムを用い、導入ガスとして、流量250[sccm]のアルゴンガスのみをボックス(チャンバー)内に導入すると共に所定の減圧を行い、更に、フィルムの搬送速度を4[m/s]に変更して、実施例9に係るPETフィルムの密着化処理を行った。実施例9におけるその他の条件等については実施例6と同様であった。ここで用いられるプラズマの処理強度指標Epdは、2049[W・s/m2]であった。
実施例6~9のPETフィルムに2時間のプラズマ処理をした際に、アーク放電が発生しないことが確認できた。これは、交流電源による各放電電極の極性が交互に切り替えられたことによるものと考えられる。
次に、実施例6~9に係る処理済みPETフィルムの密着性の評価として、フィルム処理面の表面組成(XPS)の解析を行った。XPSによる解析としては、C-C結合ピークの半値幅(FWHM)を測定し、このFWHMの値が実用上好ましい範囲である1.255[eV]以上1.560[eV]以下であるか否かの評価を行った。実施例6のフィルムの処理面のFWHMの値は1.330[eV]であり、実施例7のフィルムの処理面のFWHMの値は1.322[eV]であり、実施例8のフィルムの処理面のFWHMの値は1.512[eV]であり、実施例9のフィルムの処理面のFWHMの値は1.410[eV]であり、いずれのフィルムも必要な範囲の密着性を有していることが確認できた。比較例2として、通常のPETフィルム(コロナ処理のみ実施)では、比較例1と同様に、コロナ処理面側のFWHMの値が1.208[eV]であり、上述した好ましい範囲内の下限である1.255[eV]よりも低いものであった。
実施例6~9に係る処理済みPETフィルムの別の密着性の評価として、各処理済みのPETフィルムの処理面に、その厚みが15nmとなるように酸化アルミニウムを真空蒸着法によって蒸着させ、実施例6~9に係る処理済みPETフィルムの密着化層の上に蒸着層を積層形成した。また、その上にポリビニルアルコールと酸化ケイ素の混合物を含むガスバリア被覆層を積層形成した。更にレトルト用の積層体として、ガスバリア被覆層上に第1表面層(厚さ15μmのナイロン層)及び第2表面層(厚さ70μmのCPP)をドライラミネート法にて積層した(層構成は、図3(c)の積層フィルムF1b参照)。比較例2として、通常のPETフィルム(コロナ処理のみ実施)のコロナ処理面にその厚みが15nmとなるように酸化アルミニウムを真空蒸着法によって蒸着させ、比較例2に係るPETフィルムの上に蒸着層を積層形成した。その上に実施例6~9と同様にガスバリア被覆層を積層形成した。また、実施例6~9と同様に、その上に更に第1表面層(厚さ15μmのナイロン層)及び第2表面層(厚さ70μmのCPP)をドライラミネート法にて積層した。そして、PETフィルムと酸化アルミニウム層との実際の密着度を測定した。
Claims (15)
- 磁界を形成する磁石をそれぞれが有する第1放電電極ユニット及び第2放電電極ユニットと、前記第1放電電極ユニット及び前記第2放電電極ユニットに電気的に接続され前記第1放電電極ユニット及び前記第2放電電極ユニットの極性を交互に切り替え可能な交流電源とを備えるプラズマ処理装置を準備する工程と、
前記交流電源から前記第1放電電極ユニット及び前記第2放電電極ユニットに対して高周波電力を供給して前記プラズマ処理装置内にプラズマを生成させると共に、処理対象であるフィルムを前記プラズマ処理装置に通して搬送し当該プラズマにより前記フィルムの表面処理を行う工程と、を備え、
前記交流電源から供給される前記高周波電力により前記第1放電電極ユニット及び前記第2放電電極ユニットの極性を交互に切り替えながら前記プラズマを生成して前記フィルムの表面処理を行う、フィルムの処理方法。 - 前記高周波電力の周波数が1kHz以上400kHz以下の間である、
請求項1に記載のフィルムの処理方法。 - 前記高周波電力の周波数が10kHz以上100kHz以下の間である、
請求項1に記載のフィルムの処理方法。 - 前記第1放電電極ユニット及び前記第2放電電極ユニットはそれぞれが平板電極を備え、前記第1放電電極ユニット及び前記第2放電電極ユニットが並列に配置されている、
請求項1~3の何れか一項に記載のフィルムの処理方法。 - 前記プラズマ処理に用いられるフィルム幅方向の電極幅及び処理速度当たりの処理強度Epdが100[W・s/m2]以上となるように前記交流電源は所定の電力を前記第1放電電極ユニット及び前記第2放電電極ユニットに供給する、
請求項1~4の何れか一項に記載のフィルムの処理方法。 - 前記プラズマ処理に用いられるフィルム幅方向の電極幅及び処理速度当たりの処理強度Epdが200[W・s/m2]以上となるように前記交流電源は所定の電力を前記第1放電電極ユニット及び前記第2放電電極ユニットに供給する、
請求項1~4の何れか一項に記載のフィルムの処理方法。 - 前記プラズマ処理装置は、前記第1放電電極ユニット及び第2放電電極ユニットをその内部に配置するボックスを更に備え、
前記フィルムの表面処理を行う工程において、前記ボックス内に不活性ガスを導入する、
請求項1~6の何れか一項に記載のフィルムの処理方法。 - 前記フィルムの表面処理を行う工程において、前記ボックス内に更に酸素ガスを導入する、
請求項7に記載のフィルムの処理方法。 - 前記フィルムがポリエチレンテレフタレートフィルムであって、フィルム処理面のX線光電子分光測定におけるC1s波形分離から求めたC-C結合の半値幅が、1.255eV以上1.585eV以下である、
請求項1~8の何れか一項に記載のフィルムの処理方法。 - 前記フィルムの表面処理を行う工程において、前記第1放電電極ユニット及び前記第2放電電極ユニットと前記フィルムとの間の距離は10mm以上50mm以内である、
請求項1~9の何れか一項に記載のフィルムの処理方法。 - 前記フィルムの表面処理を行う工程において、前記フィルムの搬送速度が2m/秒以上20m/秒以下である、
請求項1~10の何れか一項に記載のフィルムの処理方法。 - 前記フィルムの表面処理を行う工程を同一の前記フィルムに対して二度以上繰り返して行う、
請求項1~11の何れか一項に記載のフィルムの処理方法。 - 請求項1~12の何れか一項に記載のフィルムの処理方法により当該フィルムへの蒸着の前処理を行う工程と、
前記蒸着の前処理工程が行われた前記フィルムの前記処理面に蒸着層を形成する工程と、
を備えるフィルムの製造方法。 - 請求項1~12の何れか一項に記載のフィルムの処理方法により当該フィルムへの他の層の積層の前処理を行う工程と、
前記積層の前処理工程が行われた前記フィルムの前記処理面に他の層を積層する工程と、
を備えるフィルムの製造方法。 - 前記フィルムと前記蒸着層又は前記他の層との密着力が、JIS K 6854-2(180度はく離)及びJIS K 6854-3(T形はく離)に準拠した測定により通常の条件(Dry)で3N/15mm以上で且つ水を付けながらの条件(Wet)で1N/15mm以上である、
請求項13又は14に記載のフィルムの製造方法。
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