WO2005035825A1 - Cvd成膜装置及びcvd膜コーティングプラスチック容器の製造方法 - Google Patents
Cvd成膜装置及びcvd膜コーティングプラスチック容器の製造方法 Download PDFInfo
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- WO2005035825A1 WO2005035825A1 PCT/JP2004/013464 JP2004013464W WO2005035825A1 WO 2005035825 A1 WO2005035825 A1 WO 2005035825A1 JP 2004013464 W JP2004013464 W JP 2004013464W WO 2005035825 A1 WO2005035825 A1 WO 2005035825A1
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- Prior art keywords
- container
- gas
- side electrode
- plastic
- plastic container
- Prior art date
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Classifications
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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
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/04—Coating on selected surface areas, e.g. using masks
- C23C16/045—Coating cavities or hollow spaces, e.g. interior of tubes; Infiltration of porous substrates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
- B65D1/0215—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features multilayered
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2501/00—Containers having bodies formed in one piece
- B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
Definitions
- the present invention relates to a CVD film forming apparatus and a method of manufacturing a CVD film coater.
- the present invention relates to a CVD (Chemical Vapor Deposition) method for coating a CVD film on at least one of an inner surface and an outer surface of a plastic container, and further relates to a CVD film forming apparatus. Manufacturing methods for membrane-coated plastic containers.
- CVD Chemical Vapor Deposition
- Patent Document 1 JP-A-8-53117
- the external electrode has a hollow shape having a space substantially similar to the outer shape of the container to be formed and accommodated for accommodating the container. In other words, it was necessary to process the inner wall surface of the cavity so that the entire outer wall surface of the plastic container almost contacted the inner wall surface of the outer electrode.
- the internal electrode of the device is inserted from the mouth of a container housed in a space.
- the raw material gas is blown out near the bottom of the container through the gas inlet tube also serving as the internal electrode, then flows to the trunk, shoulders, and openings, is discharged out of the container, and is discharged out of the space.
- a potential difference is generated between the internal electrode inserted into the container and the external electrode disposed around the container and to which a high frequency is applied, and the source gas flowing in the container is excited to generate plasma.
- Patent Document 1 the reason that the inner wall surface of the empty space and the entire surface of the outer wall surface of the plastic container are kept substantially in contact with each other is to apply a self-bias voltage uniformly to the inner wall surface of the plastic container. If there is a place where the inner wall surface of the external electrode is separated from the outer wall surface of the plastic container On the other hand, the self-bias voltage is not applied to the separated part of the inner wall of the plastic container. Therefore, during plasma ignition, the plasma ions of the source gas do not strongly collide with the inner wall surface of the container, and a dense DLC film cannot be obtained, and the film quality becomes uneven. Unless a dense DLC film is obtained, sufficient gas nolia properties cannot be obtained.
- the outer wall surface of the container and the inner wall surface of the external electrode cannot be brought into contact with each other, and it is difficult to achieve sufficient gas noria.
- the use of external electrodes along the shape of the container improves gas barrier properties, but requires some measures such as splitting the external electrodes, and it is necessary to prepare split molds for each bottle shape.
- an object of the present invention to solve the problem that the external electrode of a conventional film forming apparatus is restricted in the shape of the inner wall surface of the cavity and that conduction failure due to dust adhesion occurs in the internal electrode. That is, an object of the present invention is to apply a self-bias voltage without bringing the electrode into contact with the outer surface of the container, and to prevent dust from adhering to the other electrode and improve the operation rate of the apparatus. is there.
- the electrode corresponding to the external electrode is used as the container-side electrode, while the electrode corresponding to the internal electrode is used as the mouth-side electrode without inserting the internal electrode inside the container where the plasma density increases. Reached.
- the CVD film forming apparatus has a space for accommodating a plastic container, and holds the plastic container so that the gas inside the container of the plastic container and the gas outside the container do not intersect.
- a container-side electrode serving also as a vacuum chamber that can be accommodated in the empty space, a mouth-side electrode disposed above the opening of the plastic container in an insulated state with respect to the container-side electrode, and can be inserted into and removed from the plastic container.
- An internal gas introduction pipe made of insulating material for introducing the container internal gas, which is a raw material gas or a discharge gas to be turned into plasma, into the plastic container, and the container internal gas to the internal gas introduction pipe.
- a container internal gas supply means for supplying, and a container for supplying the container external gas, which is a source gas or a discharge gas to be turned into plasma, to the outside of the container in the space.
- an exhaust means for exhausting the container interior gas a high-frequency supply means for supplying subjecting high frequency to said container side electrode, comprising: a.
- the container external gas that has been turned into plasma during CVD film formation becomes conductive.
- the high frequency is conducted to the outer wall surface of the container, and a state similar to the state where the inner wall surface of the container electrode is in contact with the outer surface of the plastic container is created, whereby a uniform self-bias voltage is applied to the inner wall surface of the container. Can be applied.
- the CVD can be applied to only the inner surface of the container, only the outer surface of the container, or both the inner and outer surfaces of the container.
- a film can be formed.
- the gas inside the container or the gas outside the container is used as the discharge gas, the plasma surface of the plastic container can be reformed with the plasma-generated discharge gas.
- the mouth electrode facing the container electrode outside the container instead of using the internal electrode, the plasma is ignited stably and the discharge is sustained, and at the same time, dust adhesion to the mouth electrode is prevented. Can be.
- a space in which the inner wall surface is conductive is provided above the opening of the plastic container in the vacuum chamber, and the inner wall surface of the space is electrically connected to the mouth-side electrode.
- the surface area of the mouth-side electrode is expanded, and a more stable discharge can be obtained.
- the space of the container-side electrode has a shape having a part separated from the outer surface force of the plastic container when the plastic container is accommodated. .
- the space of the container-side electrode has a shape having a part separated from the outer surface force of the plastic container when the plastic container is accommodated.
- the space of the container-side electrode has a shape having a size capable of accommodating a plurality of plastic containers at the same time, and the opening of each of the plastic containers is formed.
- a mouth-side electrode is arranged above the portion, and the container internal gas supply means introduces the container internal gas into each of the plastic containers.
- the mouth-side electrode has an annular portion having an inner diameter substantially the same as the opening diameter of the plastic container, and an opening at the end of the annular portion is formed of the plastic. Preferably, it is formed so as to be coaxially aligned with the opening of the container and to be disposed near the opening of the plastic container.
- This mouth-side electrode structure can stabilize the plasma discharge in particular and at the same time make the film-forming distribution more uniform in the circumferential direction on the side surface of the container. This is because the internal electrodes of the conventional device are arranged so that their central axes coincide with the central axis of the container.
- the internal electrodes are aligned in the circumferential direction on the side of the container. This is because unevenness in the distribution of plasma density occurred, and there was slight film unevenness (color unevenness) in the circumferential direction on the side surface of the container.
- the method for producing a CVD-film-coated plastic container according to the present invention is characterized in that, in a state where the gas inside the container and the gas outside the container of the plastic container do not intersect, the container-side electrode that also serves as the vacuum chamber is used. After accommodating the plastic container and disposing the mouth-side electrode above the opening of the plastic container, replacing the inside of the plastic container with a raw material gas and replacing the inside of the space with a discharge gas, Apply high frequency to the electrode The raw material gas and the discharge gas are turned into plasma to form a CVD film on the inner surface of the plastic container, and to prevent static electricity on the outer surface of the plastic container and improve the plasma surface by improving the suitability for printing on the outer surface. It is characterized by performing quality.
- the method for manufacturing a plastic container coated with a CVD film provides a method of manufacturing a plastic container, wherein the gas inside the container and the gas outside the container are not intersected with each other.
- a high frequency is supplied to the container side electrode to convert the discharge gas and the source gas into plasma to form a CVD film on the outer surface of the plastic container and sterilize and wet the inner surface of the plastic container. It is characterized in that the surface of the plasma is improved, for example, to improve the repellency.
- the method of manufacturing a plastic container coated with a CVD film provides a method of manufacturing a plastic container, in which the gas inside the container of the plastic container and the gas outside the container intersect each other, and the container-side electrode serving also as the vacuum chamber is used. After accommodating the plastic container in the empty space and disposing the mouth-side electrode above the opening of the plastic container, the inside of the plastic container and the inside of the empty space are replaced with a raw material gas, and then the high frequency is applied to the container-side electrode. The source gas is turned into plasma to form a CVD film simultaneously on the inner surface and the outer surface of the plastic container.
- the container-side electrode serving as the vacuum chamber is used in the space.
- the inside of each plastic container is replaced with a container gas, which is a raw material gas or a discharge gas, and the space is filled. Is replaced with a raw material gas or a container external gas which is a discharge gas, and then a high frequency is supplied to the container side electrode, and the container internal gas and the container external gas are turned into plasma to form inner surfaces of the plurality of plastic containers.
- a CVD film on at least one of the outer surfaces.
- an electrode corresponding to the external electrode is used as a container-side electrode without providing an external electrode which is in contact with the outer surface of the container and is restricted in the shape of the container, while an internal electrode is provided inside the container where the plasma density is high.
- FIG. 1 is a conceptual diagram showing one embodiment of a CVD film forming apparatus according to the present embodiment.
- FIG. 2 is a conceptual diagram showing another embodiment of the CVD film forming apparatus according to the present embodiment.
- FIG. 3 is a conceptual diagram showing a third embodiment of the CVD film forming apparatus according to the present embodiment.
- FIG. 4 is a conceptual diagram showing a specific shape of a plastic container according to the present embodiment, showing (a)-(f) six modes.
- FIG. 5 is a conceptual diagram showing a fourth embodiment of the CVD film forming apparatus according to the present embodiment, which shows an apparatus capable of simultaneously forming films on a plurality of plastic containers.
- FIG. 6 is a conceptual diagram showing a fifth embodiment of the CVD film forming apparatus according to the present embodiment, in which a permanent magnet is provided around a container-side electrode as a magnetic field generating means.
- FIG. 7 is a conceptual diagram showing a sixth embodiment of the CVD film forming apparatus according to the present embodiment, and shows a case where an induction coil is provided around a container-side electrode as a magnetic field generating means.
- FIG. 8 is a conceptual diagram showing a seventh embodiment of the CVD film forming apparatus according to the present embodiment.
- FIG. 9 is a conceptual diagram showing an eighth embodiment of the CVD film forming apparatus according to the present embodiment.
- FIG. 10 is a conceptual diagram showing a ninth embodiment of the CVD film forming apparatus according to the present embodiment.
- FIG. 11 is a conceptual diagram showing a tenth embodiment of the CVD film forming apparatus according to the present embodiment.
- FIG. 12 is a conceptual diagram showing an eleventh embodiment of the CVD film forming apparatus according to the present embodiment.
- FIG. 13 is a conceptual diagram showing a twelfth embodiment of the CVD film forming apparatus according to the present embodiment.
- FIG. 14 is a diagram showing color unevenness in the circumferential direction of a container neck portion in Example 1 and Comparative Example 4 by b * value.
- Container support base made of conductive material
- Container support base made of insulator
- FIG. 1 is a conceptual diagram showing the relationship between the basic configurations of a CVD film forming apparatus according to the present invention.
- the CVD film forming apparatus according to the present invention has a space 75 for accommodating the plastic container 7 and empties the plastic container 7 so that the gas inside the plastic container 7 and the gas outside the container do not intersect.
- the container-side electrode 3 which can also be used as a vacuum chamber that can be accommodated in the place 75, the mouth-side electrode 10 placed above the opening 74 of the plastic container 7 insulated from the container-side electrode 3, and inserted inside the plastic container 7.
- An internal gas inlet pipe 9 which is detachably arranged and serves as an insulating material for introducing a container gas, which is a raw material gas or a discharge gas to be turned into plasma, into the plastic container 7 and an internal gas which serves as an insulating material.
- a container internal gas supply means 41 for supplying to the introduction pipe 9; a container external gas supply means 38 for supplying a container external gas, which is a raw material gas or a discharge gas to be plasmatized, to the outside of the container in the space 75; Exhaust gas And a high frequency supply means 39 for supplying high frequency to the container-side electrode 3.
- the container-side electrode 3, the mouth-side electrode 10, and the lid 5 constitute a film-forming chamber 16, which forms a sealable vacuum chamber.
- an empty space 75 is provided, which is a space for accommodating a plastic container 7 to be coated, for example, a PET bottle which is a container made of polyethylene terephthalate resin. Space.
- the space 75 preferably has a shape having a part separated from the outer surface force of the plastic container 7 when the plastic container 7 is stored.
- the space 75 does not need to have such a shape that the inner wall surface of the container housing space surrounds the vicinity of the outside of the plastic container unlike the device described in Patent Document 1.
- the inner wall surface of the empty space 75 and the outer wall surface of the container may be separated or the entire surface may be separated.
- the gap between the inner wall surface of the container housing space and the outer wall surface of the container depends on the electrical conductivity of the plasma-contained external gas, but is, for example, 207 mm in height and 0 in wall thickness. 3 mm, the container capacity is 500 ml, the inner surface area is 400 cm 2 , and the carbonated round PET container (body type: 68.5 mm diameter) (Fig. 4 (a) type) is approximately 2-50 mm. This value is not limited to the present embodiment, since it depends largely on the high-frequency output to be applied, the shape and size of the container, and the like.
- the gap between the inner wall surface of the container space and the outer wall surface of the container needs to be approximately 1 mm or less.
- This gap of lmm or less must be provided over the entire outer wall surface of the container.
- the container body can have no gap and the shoulder can have a gap. In other words, it is not necessary to make the shape of the space of the container side electrode similar to the outer shape of the container. It can be the maximum shape that the container can accommodate.
- the bottom of the space 75 may be configured as shown in FIG. That is, the space 75 has a shape having an inner wall surface that is in contact with the shape of the bottom of the plastic container 7 when the plastic container 7 is stored.
- the self-bias voltage can be applied directly from the container-side electrode only to the container bottom. Therefore, stable film formation can be achieved without being affected by the plasma discharge state outside the container. Further, the size of the film forming chamber 16 in the height direction can be reduced.
- the bottom of the space 75 may be configured as shown in FIG. That is, the space 75 has a shape having an inner wall surface that is in contact with the bottom and the body of the plastic container 3 when the plastic container 3 is stored.
- the container bottom and the body can be made to self-bias voltage directly from the container electrode. Therefore, stable film formation can be performed without being affected by the plasma discharge state outside the container. Further, the size of the film forming chamber 16 in the height direction can be reduced.
- a container having a high degree of freedom in shape can be adopted, including the shape of the container in the vertical cross-sectional shape illustrated in FIG.
- the bottom, torso, shoulder and neck of the container shall be referred to as the shape of the container as shown in Fig. 4. Therefore, they are not specified by the height of the container.
- the container may be provided with a reduced pressure absorbing surface. When a reduced-pressure absorbing surface is provided, it is difficult to make the inner wall surface of the container-side electrode and the outer surface of the container completely adhered over the entire surface. Therefore, when a CVD film is formed on a container having a reduced-pressure absorption surface, a gap may be provided between the inner wall surface of the container-side electrode and the outer surface of the container. It is particularly suitable to:
- the number of plastic containers accommodated in the empty space 75 is not limited to one.
- the space 75 may be sized to accommodate a plurality of plastic containers as shown in FIG.
- a permanent magnet 50 may be provided on the outer wall surface of the container-side electrode as shown in FIG.
- an induction coil 51 (current supply means of the induction coil is not shown) may be provided around the outer wall surface of the container-side electrode.
- a magnetic field generating means such as a coil and a permanent magnet.
- a trigger (not shown) may be provided in the container-side electrode 3 to forcibly perform plasma ignition.
- the space 75 is sealed from the outside by an O-ring 8 disposed between the upper container side electrode 2 and the lower container side electrode 1.
- the reason why the container-side electrode 3 is divided into the upper container-side electrode 2 and the lower container-side electrode 1 is to easily mount and remove the container 7. That is, the lower container-side electrode 1 is detached from the upper container-side electrode 2, and the lower container 7 of the upper container-side electrode 2 is mounted and taken out. Each electrode secures the sealing property with the O-ring 8 or the like interposed therebetween.
- the container-side electrode 3 may be divided into three or more. Further, the container-side electrode 3 does not have to be divided. If not divided, the container 7 can be mounted and removed from the opening 53 of the container-side electrode 3.
- the opening 53 is covered with a lid 5, and the film forming chamber 16 is sealed. At this time, the lid 5 and the container-side electrode 3 ensure sealing performance with the O-ring 54 or the like interposed therebetween.
- the opening 53 it is preferable to provide the opening 53 so that the lid is located near the container opening.
- the mouth of the plastic container 7 is in contact with the lid 5, and an opening 52 for a mouth is provided to the housing space in the container electrode 3.
- An O-ring 55 is provided at a position where the mouth opening 52 and the mouth of the plastic container 7 are in contact with each other.
- the gas inside the container and the gas outside the container are in close contact with each other so that they do not intersect.
- the plastic container 7 is in contact with the mouth opening 52 via an insulator so that electrons that generate a self-bias voltage on the surface of the plastic container 7 during plasma discharge are not grounded.
- the lid 5 is made up of the conductive member 4b and the insulating member 4a in order to achieve an insulating state, and the insulating member 4a is brought into contact with the plastic container.
- the mouth electrode 10 is arranged on the conductive member 4b. As a result, the mouth-side electrode 10 and the container-side electrode 3 are insulated. Mouth electrode 10
- the internal gas supply pipe 9 is inserted into the space inside the container-side electrode 3 through the space 23 inside the mouth-side electrode 10 and the mouth opening 52 of the conductive member 4b and the insulating member 4a. I have. At this time, the tip of the internal gas supply pipe 9 is arranged in the space inside the container-side electrode 3 and inside the plastic container 7 housed in the container-side electrode 3.
- the lid 5 is provided with a container support 56 for supporting and fixing the plastic container 7 in an electrically insulated state.
- Container support 56 may be a floating potential. However, when the plastic container 7 is supported at the bottom of the container-side electrode 3 as in the apparatus shown in FIG. 2 or FIG. 3, the container support 56 can be omitted.
- the mouth-side electrode 10 is an electrode facing the container-side electrode 3.
- the mouth electrode 10 is arranged so as to be located above the opening 74 of the container. At this time, the whole or a part of the mouth-side electrode 10 is preferably arranged near (directly above) the opening 74 of the container. This is for shortening the distance from the container-side electrode 3.
- the shape of the mouth electrode 10 can be freely determined.1S As shown in FIG. 1, the mouth electrode 10 includes an annular portion 72 having an inner diameter substantially the same as the opening diameter of the plastic container 7. Is preferred.
- the mouth electrode 10 is formed such that the opening at the end of the annular portion 72 is coaxially aligned with the opening 74 of the plastic container 7 and is disposed near the opening 74 of the plastic container 7. Is preferred.
- the reason why the ring-shaped electrode is formed is to prevent the exhaust resistance from being increased by the mouth-side electrode, and to increase the electrode area.
- the mouth electrode 10 is preferably grounded.
- the mouth-side electrode 10 is formed so that the zenithal force of the decompression chamber also depends on the tube 75 a above the opening 74 of the plastic container 7.
- the container internal gas supplied by the internal gas supply means 41 may be introduced, and the end 75b of the tube 75a may be connected to the internal gas introduction pipe 9.
- the terminal end 75b of the tubular 75a is disposed near (directly above) the opening 74 of the plastic container 7.
- the terminal end 75b is a joint that joins the tubular and internal gas introduction pipes.
- the tubular 75a can be made to function as a part of the internal gas introduction pipe while the mouth electrode is brought close to the vicinity of the opening 74.
- the axis of the tube 75a preferably coincides with the axis of the container. Plas generated in the container This is to prevent eccentricity of the plasma and to make the plasma intensity uniform in the circumferential direction of the container.
- the end of the mouth-side electrode 10 or the annular portion 72 or the end of the tube 75 b is formed by the operation of the exhaust means 71 up to the exhaust port 73 in the space 23 near the opening 74 of the plastic container 7.
- it is in contact with the bundle.
- plasma ignition can be facilitated and discharge can be stabilized.
- the reason why the ignition and discharge of the plasma are stabilized in this way is considered by the present inventors that the gas flux converted into plasma becomes a conductor.
- the space 23 has a shape in which a gas flux is not formed, that is, a shape in which a so-called stagnation portion is not generated. Becomes possible.
- the mouth electrode is arranged above the opening of the container as a counter electrode of the container electrode.
- the ignition of the plasma and the sustaining of the discharge can be achieved by using the mouth electrode disposed above the opening of the container, instead of the internal electrode disposed inside the container. Even if the distance between the mouth-side electrode and the container-side electrode is long, plasma ignition occurs if the plasma-forming gas exists as a continuous body under reduced pressure. Therefore, the discharge of plasma is sustained by disposing the mouth-side electrode above the opening of the container where the source gas-based plasma with high gas pressure and high plasma density discharged from the container opening exists.
- the discharge uniformity particularly at the neck Since the mouth electrode was not completely contained in the plasma area, the discharge became unstable after about 100,000 discharges compared to the conventional apparatus, which had little dust adhesion, whereas the apparatus of the present invention discharged about 20,000 times. However, the persistence of plasma ignition and discharge was still stable even after the heat treatment. Therefore, the interval at which the electrode cleaning process is performed can be increased, and the operation rate of the device can be improved.
- the mouth-side electrode such as the annular portion 72 of FIG. 1 or the tubular electrode 75a of FIG. 8 as the electrode facing the container-side electrode 3, there is no problem of mechanical error of the apparatus, and It is possible to reduce uneven distribution of plasma discharge in the circumferential direction, and in particular, it is possible to reduce unevenness of film distribution (unevenness of film thickness and chromaticity) at the neck.
- the material of the container side electrode and the mouth side electrode is preferably stainless steel (SUS) or aluminum!
- the internal gas introduction pipe 9 is formed in a hollow shape (tubular shape) using an insulating material. Below internal gas inlet pipe 9 At the end, one blowout hole (49) for communicating the inside and outside of the internal gas introduction pipe 9 is formed. Instead of providing the blowout holes at the lower end, a plurality of blowout holes (not shown) penetrating the inside and outside of the internal gas introduction pipe 9 in the radial direction may be formed.
- the internal gas introduction pipe 9 is connected to the end of the pipe of the container internal gas supply means 41 communicating with the inside of the internal gas introduction pipe 9. Then, the container internal gas sent into the internal gas introduction pipe 9 through the pipe is configured to be released into the plastic container 7 through the blowout hole 49.
- the internal gas introduction pipe 9 is formed of an insulating material is that it is not necessary to serve as an internal electrode and to reduce the adhesion of dust.
- the internal gas inlet pipe is also used as an internal electrode!
- most of the source gas ions in the form of plasma collided with the inner wall surface of the container but some of the source gas ions near the internal electrodes came into contact with the internal electrodes, which turned into source gas dust. Attached to internal electrodes.
- This dust was an insulating material, and the internal electrodes were insulated, making the plasma discharge unstable. In the present embodiment, such a problem of dust does not occur.
- the internal gas introduction pipe 9 is preferably formed of a resin material having insulating properties and heat resistance enough to withstand plasma.
- the resin material include fluorine resin, polyamide, polyimide, and polyetheretherketone.
- the ceramic material include alumina, zirconia, titania, silica, and quartz glass.
- the tip of the internal gas introduction pipe 9 may be inserted through the opening of the plastic container to the vicinity of the mouth. Even in this case, it is possible to supply the raw material gas to the entire inside of the plastic container. This has the advantage that the dust is hardly adhered to the internal gas inlet pipe because the plasma concentration is highest in the area where plasma concentration is highest, that is, the film-like dust does not exist most easily.
- the internal gas introduction tube is inserted into the plastic container when introducing the gas inside the container, and the internal gas introduction tube is inserted into the plastic container when the plasma is ignited. It may be provided with an internal gas introduction pipe to be separated and a removal means (not shown). With the internal gas inlet pipe and the removal means, the source gas can be distributed over the entire inside of the plastic container to form a DLC film, and the internal gas Since the introduction pipe can be separated from the plasma area, dust does not adhere.
- a lid (shutter) that can be opened and closed to cover the vicinity of the opening 74 when the internal gas introduction pipe is separated from the plastic container when plasma is ignited by providing an internal gas introduction pipe (Not shown) may be provided.
- the apparatus may be provided with dust combustion removing means (not shown) for burning and removing dust attached to the ceramic material-based internal gas inlet pipe 9.
- dust combustion removing means (not shown) for burning and removing dust attached to the ceramic material-based internal gas inlet pipe 9.
- Two or more sets of internal gas inlet pipes can be arranged alternately, and after film formation has been performed a predetermined number of times, the arrangement of the internal gas inlet pipes is changed to remove dust adhering to the standby internal gas inlet pipes. It burns by the operation of the combustion removing means.
- a plurality of mouth electrodes 10 are provided. That is, the plurality of mouth-side electrodes 10 are arranged on the lid 5.
- a gas supply means 41, an exhaust means 44 and a leak means 43 are provided for each of the mouth electrodes 10.
- the container according to the present embodiment includes a container used with a lid, a stopper, or a seal, or a container used in an open state without using them.
- the size of the opening is determined according to the contents.
- the plastic container includes a plastic container having an appropriate rigidity and a predetermined thickness, and a plastic container formed of a sheet material having no rigidity. Examples of the filling of the plastic container according to the present embodiment include beverages such as carbonated beverages, fruit juice beverages, and soft drinks, as well as pharmaceuticals, agricultural chemicals, and dry foods that dislike moisture absorption.
- the resin used for molding the plastic container of the present embodiment is polyethylene terephthalate resin (PET), polyethylene terephthalate-based copolyester resin (instead of ethylene glycol as the alcohol component of the polyester, cyclohexane is used).
- PET polyethylene terephthalate resin
- polyethylene terephthalate-based copolyester resin instead of ethylene glycol as the alcohol component of the polyester, cyclohexane is used.
- Hexandimethanol-based copolymer is called PETG (manufactured by Eastman Chemical), polybutylene terephthalate resin, polyethylene naphthalate, polyethylene S, polypropylene S, polypropylene resin (PP), cycloolefin copolymer Resin (COC, cyclic olefin copolymer), ionomer resin, poly 4-methylpentene 1 resin, polymethyl methacrylate resin, polystyrene resin, ethylene vinyl alcohol copolymer resin, acrylonitrile resin, polychloride Bee Resin, polyamide resin, polyamide resin, polyamide imide resin, polyacetal resin, polycarbonate resin, polysulfone resin, or tetrafluoroethylene resin, Atari mouth-tolyl styrene resin And acrylonitrile butadiene styrene resin.
- PET is particularly preferred.
- the container internal gas supply means 41 introduces the container internal gas supplied from the container internal gas generation source 20 into the plastic container 7. That is, one end of the pipe 11 is connected to the base end of the internal gas introduction pipe 9, and the other side of the pipe 11 is connected to one side of the mass flow controller 19 via the vacuum valve 16. The other side of the mass flow controller 19 is connected to a gas source 20 inside the container via a pipe.
- the gas generating source 20 inside the container generates a raw material gas or a discharge gas for plasma.
- the source gas is selected as a gas inside the container when a CVD film is formed on the inner surface of the plastic container.
- a source gas for example, when a DLC film is formed, aliphatic or aromatic hydrocarbons, aromatic hydrocarbons, oxygen-containing hydrocarbons, nitrogen-containing hydrocarbons, etc., which are gaseous or liquid at room temperature, are used.
- benzene, toluene, o-xylene, m-xylene, p-xylene, cyclohexane and the like having 6 or more carbon atoms are desirable.
- aliphatic hydrocarbons especially ethylene hydrocarbons such as ethylene, propylene or butylene, or acetylene such as acetylene, arylene or 1-butyne. Hydrocarbons are preferred. These raw materials may be used alone or may be used as a mixed gas of two or more kinds. Further, these gases may be diluted with a rare gas such as argon or helium for use. When forming a silicon-containing DLC film, a Si-containing hydrocarbon-based gas is used.
- the DLC film referred to in the present embodiment is an i-carbon film or a hydrogenated amorphous carbon film (a
- the DLC film is a carbon film of Amorufa focal also has SP 3 bond.
- a hydrocarbon gas for example, acetylene gas, is used as a source gas for forming the DLC film, and a Si-containing hydrocarbon gas is used as a source gas for forming the Si-containing DLC film.
- the discharge gas is selected as the container internal gas when the inner surface of the plastic container 7 is subjected to plasma surface modification.
- a gas to be converted into plasma is selected in the same manner as the source gas.
- the discharge gas is preferably a rare gas such as helium or argon, nitrogen, oxygen, carbon dioxide, fluorine, water vapor gas, ammonia gas, carbon tetrafluoride, or a mixed gas thereof among the gases to be turned into plasma.
- the container external gas supply means 38 is a source gas or a discharge for forming a plasma in a closed space (hereinafter referred to as "outside the container") outside the plastic container 7 and in the film forming chamber 6. Gas is introduced. That is, an external gas inlet (not shown) is provided at a predetermined position of the lid 5 or the container-side electrode 3 in the film forming chamber 16 through which gas can be introduced outside the container.
- FIG. 1 shows a case where the lid 5 is provided with a gas inlet outside the container.
- One side of a pipe 33 is connected to the lid 5 or the vessel external gas inlet provided in the vessel side electrode 3 as a starting point, and the other side of the pipe 33 is connected to one side of a mass flow controller 35 via a vacuum valve 34. It is connected.
- the other side of the mass flow controller 35 is connected to a gas source 37 outside the container via a pipe 36.
- the container external gas generation source 37 generates a raw material gas or a discharge gas for plasma. Since the gas outside the container is a raw material gas or a discharge gas to be turned into plasma, it is turned into plasma outside the container, which is a closed space, by the high frequency supplied to the container side electrode 3. Since the plasma-formed container external gas is a conductor, high frequency is conducted to the outer surface of the plastic container 7.
- the gas inside the container is turned into plasma inside the plastic container 7 by the high frequency conducted on the outer surface of the plastic container 7. Since the gas inside the container and the gas outside the container intersect each other, plasma is ignited independently of the inside of the container and the outside of the container which is a closed space.
- the source gas is selected as a container external gas when a CVD film is formed on the outer surface of a plastic container.
- the raw material gas the same kind of gas as that of the raw material gas in the container internal gas is selected.
- the discharge gas is selected as the container external gas when the outer surface of the plastic container 7 is subjected to plasma surface modification.
- the gas to be converted into plasma is selected in the same manner as the source gas.
- the discharge gas select the same type of gas as the discharge gas outside the container Is done.
- the space 23 is connected to one side of the pipe 13, and the other side of the pipe 13 is connected to a vacuum pump 21 via a vacuum valve 18.
- the vacuum pump 21 is connected to an exhaust duct 29.
- This exhaust system constitutes exhaust means 71.
- the space 23 is connected to one side of the pipe 12, and the other side of the pipe 12 is connected via a vacuum valve 17 to a leak source 27 for releasing the inside of the container to the atmosphere.
- the container-side electrode 3 is connected to one side of a pipe 30, and the other side of the pipe 30 is connected to a leak source 32 via a vacuum valve 31 in order to open the closed space outside the container to the atmosphere.
- the space 75 is connected to one side of a pipe 80, and the other side of the pipe 80 is connected to a vacuum pump 25 via a vacuum valve 40.
- This vacuum pump 25 is connected to an exhaust duct 26.
- This exhaust system constitutes a container external gas exhaust unit.
- the high frequency supply means 39 includes an automatic matching unit (matching box) 14 connected to the container-side electrode 3 and a high frequency power supply 15 connected to the automatic matching unit 14 via a coaxial cable.
- the high frequency power supply 15 is grounded.
- the high frequency power supply 15 generates a high frequency which is energy for converting the gas outside the container and the gas inside the container into plasma.
- the frequency of the high frequency power supply is between 100kHz and 1000MHz. For example, use a 13.56MHz industrial frequency.
- As the high-frequency output for example, a power of 10 to 2000 W is selected.
- the automatic matching unit 14 adjusts the impedance of the mouth-side electrode 10 and the film-forming chamber 6 so as to be matched with the inductance and the capacitance C.
- the manufacturing apparatus may be the apparatus according to another embodiment shown in FIGS. 10 to 13.
- the apparatus shown in FIG. 10 is an example in which a container-side electrode 62 composed of an upper container-side electrode 60 and a lower container-side electrode 61 is used as a film forming chamber. In this case, unlike the above embodiment, no lid is provided.
- the lower container-side electrode 61 is supported by elevating means 65, and the container-side electrode 62 (the film forming chamber 1) can be freely opened and closed by raising and lowering the lower container-side electrode 61.
- the apparatus shown in FIGS. 11 and 13 also includes the same elevating means 65. In the device shown in FIG.
- the container-side electrode 61 is insulated from the upper container-side electrode 60 connected to the high-frequency supply means 39 by an insulating member 63 such as a heat-resistant plastic resin.
- an insulating member 63 such as a heat-resistant plastic resin.
- the container-side electrode 68 functions as a film forming chamber.
- the device shown in FIG. 13 is a modification of the device shown in FIG. 11, and uses a container support 70 made of an insulating material such as a heat-resistant plastic resin instead of providing the insulating member 63, so that the self-noise voltage is reduced. Can be adjusted. As in the case of FIG. 11, the bottom film thickness can be adjusted.
- the container-side electrode 68 functions as one of the film forming chambers.
- the container supports 69 and 70 enable the plastic container to be stably held even when the lower container-side electrode 67 is raised and lowered, and the container opening is easily sealed when the container is set in the film forming chamber. It becomes.
- Each of the container supports 69 and 70 may be fixed to the lower container-side electrode 67 or may not be fixed.
- the volume of the film forming chamber can be appropriately increased or decreased as long as a plastic container can be accommodated.
- FIG. 13 shows a case where the volume of the film forming chamber is smaller than that of FIG.
- the outside of the container in the film forming chamber 16 is opened to the atmosphere by opening a vacuum valve 31.
- the inside of the plastic container 7 is opened to the atmosphere by opening the vacuum valve 17.
- the lower container-side electrode 1 of the container-side electrode unit 3 is removed from the upper container-side electrode 2.
- An uncoated plastic container 7 is inserted from below the upper container electrode 2 into the space inside the upper container electrode 2 and installed. At this time, the internal gas introduction pipe 9 is in a state of being inserted into the plastic container 7.
- the lower vessel-side electrode 1 is mounted below the upper vessel-side electrode 2, and the vessel-side electrode 3 is sealed by an O-ring 8.
- the lid 5 and the container-side electrode 3 are removed, and the plastic container 7 is placed on the container-side electrode 3 having a hollow bottom.
- the lid 5 is lowered to close the opening 53 of the container-side electrode 3 tightly.
- the container may be attached.
- the vacuum valve 18 is opened and the vacuum pump 21 is operated. Thereby, the inside of the plastic container 7 is evacuated through the pipe 13 to be a vacuum. At this time, the pressure in the plastic container 7 is 2.6-66 Pa.
- the vacuum valve 31 is closed, the vacuum valve 40 is opened, and the vacuum pump 25 is operated.
- the inside of the container which is a closed space, is evacuated through the pipe 80 to be a vacuum.
- the pressure inside the vessel at this time is 2.6-66 Pa.
- the vacuum valve 16 is opened, a gas inside the container is generated at the gas source 20 inside the container, the gas inside the container is introduced into the pipe 22, and the gas inside the vessel whose flow rate is controlled by the mass flow controller 19 is connected to the pipe 11. And the gas is blown out from the gas outlet 49 through the internal gas inlet pipe 9. Thereby, the gas inside the container is introduced into the plastic container 7.
- the inside of the plastic container 7 is maintained at a pressure (for example, about 6.6 to 665 Pa) suitable for turning the gas inside the container into a plasma by a controlled balance between the gas flow rate and the exhaust capacity, thereby stabilizing the gas.
- the vacuum valve 34 is opened, a container external gas is generated in the container external gas generation source 37, and the container external gas is introduced into the pipe 36, and the container external gas whose flow rate is controlled by the mass flow controller 35 is controlled.
- the gas outside the container is introduced into the outside of the container.
- the inside of the container is kept at a pressure (for example, about 6.6 to 665 Pa) suitable for turning the gas outside the container into a plasma, and is stabilized by the balance between the controlled gas flow rate and the exhaust capacity.
- an RF output (eg, 13.56 MHz) is supplied to the container-side electrode 3 by the high-frequency supply means 39.
- plasma is ignited between the container-side electrode 3 and the mouth-side electrode 10.
- the inside of the plastic container 7 and the outside of the container form separate spaces with the wall surface of the plastic container as a boundary, but plasma is ignited in both cases. That is, the high-frequency wave supplied to the container-side electrode 3 is applied to the outside of the container by plasma, and the high-frequency is guided to the outer surface of the plastic container 7 by using the plasma-contained gas outside the container as a conductor. Also, the gas inside the container is turned into plasma.
- the impedance of the automatic matching unit 14 is adjusted by the inductance capacitance C so that the reflected wave of the overall power of the electrode supplied to the output is minimized.
- the sky filled with the source gas Hydrocarbon plasma is generated in the gap, and a DLC film is formed on at least one of the inner surface and the outer surface of the plastic container 7.
- the film formation time at this time is as short as several seconds.
- the RF output from the high frequency supply means 39 is stopped, the plasma is extinguished, and the deposition of the DLC film is completed.
- the vacuum valve 16 and the vacuum valve 34 are closed to stop the supply of the gas inside the container and the gas outside the container.
- the vacuum valves 18 and 40 are opened, and these gases are exhausted by the vacuum pumps 21 and 25. I do. Thereafter, the vacuum valves 18 and 40 are closed, and the evacuation is terminated. At this time, the pressure inside the plastic container 7 and the pressure inside the container are 6.6-665 Pa, respectively. Thereafter, the vacuum valves 17, 31 are opened. As a result, air enters the space 23, the inside of the plastic container 7, and the space outside the container, and the inside of the film forming chamber 16 is opened to the atmosphere.
- a film can be simultaneously formed on a plurality of plastic containers by performing the same operation as described above in each plastic container.
- a CVD film is formed on the inner surface of the container, while the outer surface is Reforming can be performed.
- a dense DLC film having gas nori properties can be formed on the inner surface of the plastic container.
- a DLC film By forming a DLC film on the inner surface of the container, it provides a gas barrier property against oxygen and carbon dioxide and a water vapor barrier property, and further suppresses adsorption of odor components and the like on the container wall surface and sorption on the container resin. Can be.
- the plasma surface modification of the outer surface of the container is as follows.
- the outer surface of the plastic container is roughened by inert plasma treatment, thereby improving the adhesiveness of a label or the like and printing ink. Improves aptitude and prevents static electricity (prevents adhesion of dirt).
- functional groups are provided by reactive plasma treatment to improve the adhesion of labels and the like. You can also. Therefore, different functions can be separately provided to the inner surface of the container and the outer surface of the container.
- a CVD film is formed on the outer surface of the container, while the inner surface can be subjected to plasma surface modification.
- a source gas for example, acetylene gas
- a DLC film can be formed on the outer surface of the container.
- the DLC film formed on the outer surface of the container makes it possible to ensure gas nobility. Furthermore, it is possible to realize a reduction in the coefficient of static friction and to prevent external scratches.
- the plasma surface modification of the inner surface of the container is as follows. That is, microorganisms can be sterilized by using helium, argon, oxygen, nitrogen or the like as the discharge gas of the gas inside the container.
- This disinfection is not only due to the plasma active species, but also to a large extent due to the ultraviolet radiation emitted by the plasma.
- nitrogen, oxygen, carbon dioxide, fluorine or a mixed gas thereof as a discharge gas, it is possible to improve the wettability of the inner surface of the container by introducing a polarity by reactive plasma treatment.
- a CVD film can be formed on both the inner surface and the outer surface of the container.
- a dense DLC film having gas noria can be formed on the inner surface and the outer surface of the container.
- a gas-noble DLC film By forming a gas-noble DLC film on both walls of a plastic container, a high gas barrier Plastic containers can be manufactured.
- the coefficient of static friction can be reduced and the outer surface can be prevented from being scratched.
- a PET bottle for beverages is used as a container for forming a thin film inside the container!
- a container used for other purposes can be used.
- a DLC film or a Si-containing DLC film is used as a thin film to be formed by the CVD film forming apparatus. It is possible to use the equipment.
- the DLC film is formed to have a thickness of 0.003 to 5 ⁇ m.
- PET bottles were used as plastic containers.
- the height of the PET bottle was 207 mm, the wall thickness was 0.3 mm, the container volume was 500 ml, and the inner surface area was 400 cm 2 .
- the shape of the bottle is the container shown in Fig. 4 (a) (round carbon dioxide), and the diameter of the body is 68.5mm.
- the distance between the outer surface of the container and the inner wall surface of the container electrode is 1. Omm.
- the distance between the outer surface of the container neck and the inner wall surface of the container-side electrode is 20 mm.
- PET bottles of the container (heat-resistant round type) in FIG. 4 (e) and the container (heat-resistant square type) of FIG. 4 (f) were also used.
- the PET bottles of the container (heat-resistant round type) in FIG. 4 (e) and the container (heat-resistant square type) in FIG. 4 (f) have a reduced-pressure absorbing surface or panel.
- the container for carbonic acid has a cylindrical conical shape due to the internal pressure of carbon dioxide gas.
- the heat-resistant container has some irregularities on its body. When the contents treated at a temperature of about 80-95 ° C are filled into a container while maintaining the temperature, sealed and shipped as a product, the contents are cooled when the contents are cooled to room temperature. The pressure is reduced and the shape change of the container itself is inevitable.
- the wall surface of the body or the like having the irregularities is referred to as a reduced pressure absorbing surface or a panel. Table 2 summarizes the characteristics of each container in Fig. 4 (a), (e) and (f).
- Mouth length (length of one side) mm 60 Gap (maximum diameter f, flannel) mm nt
- Table 3 summarizes the film forming conditions of Example 18. Use a high-frequency power source with an industrial frequency of 13.56 MHz. Comparative Example 1 was an untreated PET container. Table 3 also shows the results of the evaluation of oxygen permeability and printable water wettability. As for the outside, the gap at the neck is 20mm and there is no problem because the plasma is generated. The external pressure was increased to make it easier to generate plasma even in a small gap. In addition, 2% of argon was added to source gases such as nitrogen gas and acetylene gas to facilitate generation of plasma. For the mouth electrode, a mouth electrode having an annular portion was placed 25 mm immediately above the container opening. The film forming method followed the manufacturing method described in the embodiment. A tube made of fluorine resin was used as a raw material gas introduction tube.
- Example 8 Acetylene Argon 3 400 15 60 0.003 Heat-resistant square type (50) (30)
- Comparative Example 3 Acetylene 3 400 15 0.008 Heat-resistant round type (50) Printability was evaluated by measuring the surface tension of the container based on the critical surface tension method of Zisman. The measurement site was the flat part of the trunk. Untreated PET was 43dynZcm and those with 45dynZcm or more were considered to have improved printability. Oxygen permeability was measured using Modern Control Oxtran at 23 ° C and 60% RH. In the present embodiment, a PET container shown in Table 2, the inner surface area of the container is 400 cm 2 Z container or 390c m 2 Z vessel. Oxygen permeability is calculated per container. When converting this per area (m 2 ), the conversion may be performed in consideration of the inner surface area of the container.
- the thickness of the DLC film is determined by attaching a Si wafer to the inner surface of the container in advance, masking it with tape, coating the DLC, removing the masking, and using a surface shape measuring instrument DEKTAK3 manufactured by Veeco. Then, the film thickness was measured.
- the amount of flake-like dust adhering to the raw material gas inlet tube was determined by stripping off the dust from the raw material gas inlet tube and measuring the weight with an electronic balance (Mettler, UMT2).
- the amount of film dust was determined by repeatedly calculating the weight difference of the entire gas introduction pipe before and after film formation (using R300S manufactured by Sartorius). Chromaticity was measured with a Hitachi spectrophotometer U-3500.
- Example 1 In the container of Example 1, a DLC film having a thickness of 150A was formed on the inner surface of the PET bottle. Also, the outer surface of the container was roughened, and the printability was improved as compared with Comparative Example 1.
- the oxygen permeability of Example 1 was 0.003 ml Z container Z days.
- the oxygen permeability of Comparative Example 1 was 0.031 mlZ container Z days. In other words, the oxygen gas nobility improved 10.3 times.
- Example 2 In the container of Example 2, a 150 A-thick DLC film was formed on the inner surface of the PET bottle. In addition, due to the ion bombardment effect of the inert gas on the outer surface of the container, printability was improved as compared with Comparative Example 1.
- the oxygen permeability of Example 2 was 0.003 mlZ container Z days. Compared with Comparative Example 1, the oxygen gas nobility was improved 10 times.
- Example 3 In the container of Example 3, a DLC film having a thickness of 120 A was formed on the outer surface of the PET bottle.
- the oxygen permeability of Example 3 was 0.004 mlZ container Z days. Compared with Comparative Example 1, the oxygen gas nobility was improved 7.8 times.
- Example 4 In the container of Example 4, a DLC film having a thickness of 110 A was formed on the outer surface of the PET bottle. Moreover, the wettability of the inner surface of the container was improved as compared with Comparative Example 1. When the carbonated beverage was actually placed in the container, the amount of carbon dioxide bubbles generated was visually reduced. The oxygen permeability of Example 4 was 0.004 mlZ container Z days. Compared with Comparative Example 1, the oxygen gas barrier property was improved by 7.8 times.
- Example 5 In the container of Example 5, a DLC film having a thickness of 120 A was formed on the outer surface of the PET bottle, and a DLC film having a thickness of 150 A was formed on the inner surface.
- the oxygen permeability of Example 5 was 0.002 mlZ container Z days. Compared with Comparative Example 1, the oxygen gas barrier property was improved by 15.5 times.
- Example 6 In the container of Example 6, a DLC film having a thickness of 60 A was formed on the outer surface of the PET bottle, and a DLC film having a thickness of 80 A was formed on the inner surface.
- the oxygen permeability of Example 6 was 0.003 mlZ container Z days.
- the oxygen gas barrier property was improved 10.3 times as compared with Comparative Example 1.
- the containers of Examples 7 and 8 are heat-resistant round containers having a reduced-pressure absorbing surface on the outer wall surface of the container. . If there is a reduced pressure absorbing surface, the gap between the outer wall surface of the container and the inner wall surface of the container-side electrode changes according to the concave and convex portions of the reduced pressure absorbing surface, and the gap increases in the concave portion. However, in Examples 7 and 8, the same dense DLC film was formed at any location despite such a change in unevenness and an increase in the gap at the recess.
- Examples 18 to 18 a dense DLC film having gas nolia properties could be formed.
- the gap between the outer wall surface of the container and the electrode surface on the container side was as large as about 20 mm at the container neck, the same dense DLC film was formed as at other places.
- Comparative Examples 2 and 3 film formation was performed in the absence of a plasma-contained external gas serving as a conductor outside.
- Comparative Example 2 although the gap between the convex portion of the reduced-pressure absorbing surface and the inner wall surface of the container-side electrode was lmm, the gap between the concave portion of the reduced-pressure absorbing surface and the inner wall surface of the container-side electrode was 5.0 to 5.5 mm. It was not possible to form a uniform DLC film. In addition, since there was a gap of 20 mm at the neck of the container, a dense DLC film could not be formed at this location.
- Embodiments 1 to 8 the CVD film forming apparatus corresponding to FIG. 1 was used, but the CVD film forming apparatuses shown in FIGS. 2 and 3 were similar to those in Examples 1 and 2. The result was obtained. Also, in the CVD film forming apparatus shown in FIG. 5, the same result as that of Example 18 was obtained in each container.
- a DLC film was formed in the same manner as in Example 1 using the same type of device as the conventional internal electrode type described in Patent Document 1 except that the internal electrode was used instead of the mouth-side electrode.
- Example 4 was used.
- the average thickness of the DLC film was 150A.
- the oxygen permeability of Comparative Example 4 is 0.003 mlZ container Z days. Therefore, Example 1 had the same oxygen noria property as the internal electrode type device.
- Example 1 For each container of Example 1 and Comparative Example 4, the chromaticity of the neck portion of one round along the circumferential direction of the container side (b * value ) was measured. Thereby, color unevenness can be determined.
- the b * value is a color difference according to JISK 7105-1981, and can be obtained from the tristimulus values X, Y, and Z using Equation 1.
- the apparatus of the present invention can manufacture a DLC film-coated plastic container with less DLC film distribution unevenness in the circumferential direction on the container side surface.
- the apparatus according to the present invention produces a plastic container having excellent gas noria with good productivity and operates at a high operation rate. : Can be. Furthermore, there is little uneven distribution of the DLC film in the circumferential direction of the container side.
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Abstract
Description
Claims
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JP2003336362A JP2005105294A (ja) | 2003-09-26 | 2003-09-26 | Cvd成膜装置及びcvd膜コーティングプラスチック容器の製造方法 |
JP2003-336362 | 2003-09-26 |
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WO2012113568A1 (de) * | 2011-02-25 | 2012-08-30 | MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. | Desinfektionseinrichtung, behälter, verwendung eines behälters und desinfektionsverfahren zur desinfektion eines behälters, insbesondere für einen lebensmittelbehälter |
JP2013245387A (ja) * | 2012-05-28 | 2013-12-09 | Nissei Asb Mach Co Ltd | 樹脂容器用コーティング装置 |
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JP5000154B2 (ja) * | 2006-02-28 | 2012-08-15 | 三菱重工食品包装機械株式会社 | 充填システム及び方法 |
DE102006032568A1 (de) * | 2006-07-12 | 2008-01-17 | Stein, Ralf | Verfahren zur plasmagestützten chemischen Gasphasenabscheidung an der Innenwand eines Hohlkörpers |
FR2907036B1 (fr) * | 2006-10-11 | 2008-12-26 | Sidel Participations | Installation de depot, au moyen d'un plasma micro-ondes, d'un revetement barriere interne dans des recipients thermoplastiques |
JP4608511B2 (ja) * | 2007-02-09 | 2011-01-12 | 国立大学法人東京工業大学 | 表面処理装置 |
JP5603201B2 (ja) * | 2010-10-27 | 2014-10-08 | サントリーホールディングス株式会社 | 樹脂製容器の表面改質方法および樹脂製容器の表面改質装置 |
JP5785650B2 (ja) * | 2013-11-26 | 2015-09-30 | 泉工業株式会社 | 容器の内壁処理方法及び容器の内壁処理装置 |
WO2015135460A1 (zh) * | 2014-03-13 | 2015-09-17 | 无锡华瑛微电子技术有限公司 | 化学液存储瓶及其制造方法 |
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