JP5345104B2 - Metallized film, method for producing the same, and metallized film capacitor using the metallized film - Google Patents

Description

  The present invention relates to a metallized film, a method for producing the same, and a metallized film capacitor using the metallized film.

  Conventionally, as a method for producing a metallized film used for a metallized film capacitor or the like, for example, a metal vapor deposition layer is formed on the surface of the film by performing metal vapor deposition after attaching oil to the film by vapor deposition or the like. At the same time, a method of forming an insulation margin is used (for example, see Patent Documents 1 and 2).

The manufacturing method of the conventional metallized film 80 is demonstrated using FIG.
FIG. 7A is a cross-sectional view schematically showing an example when oil 88 is vapor-deposited on the film 89 in the conventional method for producing the metallized film 80. FIG. 7B is a cross-sectional view schematically showing a state when metal deposition is performed on the film 89 shown in FIG.

In the conventional method for producing a metallized film, as shown in FIG. 7A, first, oil 88 is vapor-deposited on the surface 89 a of the film 89. The oil 88 has a broad mountain shape with a raised central portion and covers at least the margin portion 89M (margin formation scheduled portion). The adhesion range of the oil 88 is relatively wide and extends to the vapor deposition part 89D (metal vapor deposition scheduled part).
Subsequently, metallization is performed on the film 89 on which the oil 88 is deposited, whereby the metallized film 80 shown in FIG. 7B can be obtained.

The metallized film 80 includes a film 89 and a metal vapor deposition layer 81 formed on the surface 89 a of the film 89. The film 89 includes a margin part 89M and a vapor deposition part 89D. The margin portion 89M is a portion where the metal vapor deposition layer 81 is not formed. The vapor deposition part 89D is a part where the metal vapor deposition layer 81 is formed.
In metal deposition, if even a small amount of oil is attached, it is not always possible to mask, and if a certain amount of oil (thickness) is not attached, the oil is removed by repeatedly colliding metal particles. Or diffused by re-evaporation or the like, and the deposited metal adheres, so that the deposited metal layer 81 is formed up to the bottom of the oil 88.

  In a metallized film capacitor, electrodes (+ and −) having different polarities are alternately overlapped, so that an insulating margin for insulation is required at the end opposite to the electrode lead-out. The margin portion 89M is a portion that becomes the insulation margin. The metal vapor-deposited layer 81 has an inclined portion 81S whose thickness decreases near the margin portion 89M in the vicinity of the margin portion 89M.

  As described above, according to the method for manufacturing the metallized film 80 described with reference to FIG. 7, the metal vapor deposition layer 81 whose thickness gradually decreases toward the boundary between the vapor deposition portion 89D and the margin portion 89M is formed.

JP 9-266127 A JP 2001-76960 A

  However, according to the metallized film manufacturing method shown in FIG. 7, the margin portion 89M is formed only by oil vapor deposition, and it is difficult to locally attach the oil 88 to the film 89 by oil vapor deposition. As shown to Fig.7 (a), the oil 88 spread | diffuses in a wide range, and becomes a mountain shape which is wide and low. When the metallized film 80 is manufactured using such a film 89, as shown in FIG. 7B, the inclined portion 81S whose thickness gradually decreases toward the boundary of the margin portion 89M has a gently wide width ( For example, it occurs at 0.1 to 0.5 mm.

  In such a capacitor using the metallized film 80, the electric field concentrates on the tip portion 81T of the metal vapor deposition layer 81 on the margin portion 89M side, and the metal vapor deposition layer 81 is likely to disappear (film receding) due to oxidative degradation. was there.

As a method for solving the above problem, for example, there is a method of adjusting the oil ejection angle from the nozzle and increasing the amount of oil to make the metal deposition layer stand out.
This method will be described with reference to FIG.
Fig.8 (a) is sectional drawing which shows typically the other example when oil is vapor-deposited on a film in the manufacturing method of the conventional metallized film. FIG.8 (b) is sectional drawing which shows typically a state when metal vapor deposition is performed to the film shown to (a). In FIG. 8, the same parts as those in FIG. 7 are denoted by the same reference numerals as those in FIG.

In this metallized film manufacturing method, oil 98 is first deposited on the surface 89a of the film 89, as shown in FIG. The oil 98 covers at least the margin portion 89 </ b> M similarly to the oil 88 shown in FIG. 7A, but rises higher than the oil 88, and the amount of the oil 98 is larger than the amount of the oil 88.
Subsequently, the metallized film 90 shown in FIG. 8B can be obtained by performing metal deposition on the film 89 on which the oil 98 is deposited.

  The metallized film 90 includes a film 89 and a metal vapor-deposited layer 91 formed on the surface 89 a of the film 89. The metal vapor-deposited layer 91 has an inclined portion 91S whose thickness decreases near the margin portion 89M in the vicinity of the margin portion 89M. The width of the inclined portion 91S (for example, 1 to 100 μm) is narrower than the width of the inclined portion 81S shown in FIG. 7B, and the rising angle of the inclined portion 91S is steeper than that of the inclined portion 81S.

  Thus, according to the manufacturing method of the metallized film demonstrated using FIG. 8, the metal vapor deposition layer 91 with which the rising angle of the inclination part 91S was steep can be formed.

  However, according to the method of manufacturing a metallized film shown in FIG. 8, in order to prevent the oil 98 from diffusing, it is necessary to bring the oil jet (not shown) and the film 89 sufficiently close to each other, and a large amount of oil is required. Must be attached. Therefore, there is a problem that the winding property of the film 89 is remarkably lowered, and as a result, the productivity is lowered.

  In addition, as a conventional method for producing a metallized film, there is a method in which a metal vapor deposition layer is formed on the surface of a film by performing metal vapor deposition after printing oil, instead of depositing oil on the film.

The oil printing process in this metallized film manufacturing method will be described with reference to FIG.
9A to 9C are cross-sectional views schematically showing the oil printing process. In FIG. 9, the same parts as those in FIG. 7 are denoted by the same reference numerals as those in FIG.

As shown in FIG. 9A, when the oil 78 is printed on the surface 89a of the film 89, first, an appropriate amount of oil 78 is attached to the convex portion 70B of the printing jig 70P, and the convex portion 70B is attached to the margin portion 89M. Position it above.
Next, as shown in FIG. 9B, the printing jig 70P is brought close to the surface 89a of the film 89, the convex portion 70B is pressed against the surface 89a of the film 89, and the oil 78 adhered to the convex portion 70B Transfer to the surface 89a of 89.

Next, as shown in FIG. 9C, the printing jig 70 </ b> P is moved away from the surface 89 a of the film 89, and the convex portion 70 </ b> B and the oil 78 are separated. Thereby, the printing of the oil 78 is completed.
The oil 78 printed on the film 89 covers the margin part 89M and further covers a part of the vapor deposition part 89D located on both sides of the margin part 89M. Also, the oil 78 printed on the film 89 is printed on the film 89 by pressing the convex portion 70B against the surface 89a of the film 89 as shown in FIG. The dents and the edge portions 78B on both sides of the central portion 78C are raised.

  The oil printing is suitable for locally attaching a certain amount of oil 78, but in this method, the oil 78 attached to the tip of the convex portion 70B of the printing jig 70P is pressed against the film 89 for printing. In the film 89 that has undergone the steps shown in FIGS. 9A to 9C, the amount of oil in the central portion 78C of the oil 78 decreases.

In metal deposition, if even a small amount of oil is attached, it is not always possible to mask, and if a certain amount of oil (thickness) is not attached, the oil is removed by repeatedly colliding metal particles. Or diffuses and deposits the deposited metal.
Therefore, when metal vapor deposition is performed on the film 89 shown in FIG. 9C, there is a problem that the vapor deposition metal adheres to a portion corresponding to the central portion 78C.

In view of the above problems, an object of the present invention is to provide a metallized film that can suppress disappearance (film receding) of a metal vapor deposition layer due to oxidative degradation in a metallized film without reducing the rollability of the film. It is to provide a manufacturing method.

In the oil vapor deposition, as shown in FIG. 7 (a), the central portion of the oil 88 is raised, so that there is a merit that the margin portion 89M can be surely secured. However, as shown in FIG. There is a demerit that 81 inclined portions 81S are generated with a wide width.
On the other hand, in the oil printing, as shown in FIG. 9C, since the central portion 78C of the oil 78 is recessed, there is a demerit that the deposited metal adheres to a position that should originally become the margin portion 89M. There is an advantage that the rising angle of the oil 78 at the portion in contact with the surface 89a of the film 89 is increased.

  The present invention overcomes the disadvantages by using the respective merits, performs the oil mask over a wide area by vapor deposition, and performs the oil printing on the boundary portion between the vapor deposition metal and the margin part (insulation margin). It solves the problem of the present invention.

Specifically, the present invention employs the following configuration.
(1) A method for producing a metallized film having a vapor deposition portion where a metal vapor deposition layer is formed on a surface of a dielectric film, and a margin portion adjacent to the vapor deposition portion,
An oil vapor deposition step of evaporating oil to adhere to the surface of the dielectric film and forming a margin;
An oil printing step of printing oil on the margin portion along an edge of the margin portion;
A metal vapor deposition step of forming the metal vapor deposition layer on the vapor deposition portion by performing metal vapor deposition after the oil vapor deposition step and the oil printing step;
The manufacturing method of the metallized film characterized by including.

According to the configuration of (1), oil is evaporated to adhere to the surface of the dielectric film, and an oil vapor deposition process for forming a margin portion, and an oil along the edge of the margin portion on the margin portion. With the oil printing process that prints and the metal vapor deposition process that forms the metal vapor deposition layer on the vapor deposition part by performing the metal vapor deposition after the oil vapor deposition process and the oil printing process, the margin part is surely secured However, the rising angle of the metal vapor deposition layer can be increased.
Specifically, the oil printing makes the slope of the metal layer steep at the boundary with the margin portion, and the thickness of the deposited oil central portion is secured by oil vapor deposition, so that the metal vapor deposition layer is formed in the margin portion. Can be suppressed.
As a result, disappearance (film receding) of the metal vapor deposition layer due to oxidative degradation in the metallized film can be suppressed.
Further, since the rising angle of the oil is increased by the oil printed on the edge of the margin portion, the oil injection amount can be reduced. Therefore, the rollability of the film is not deteriorated, and the slipperiness of the metallized film is improved.

In addition, if the margin part is formed by the mask when the metallized film is manufactured, the shape on the margin part side of the metal vapor deposition layer can be made to be a sharp shape. However, in mask vapor deposition, vapor deposition metal is deposited on the mask, so that there is a problem that long-time vapor deposition cannot be performed and productivity is poor.
Therefore, at present, as a metal vapor deposition when producing a metallized film, the formation of a margin part by the vapor deposition of oil is mainly used. In such a situation, the present invention makes it possible to obtain a deposited metal layer having a shape similar to that obtained when mask deposition is performed even when a margin portion is formed by oil spraying.

Here, in the present invention, the dielectric film is composed of “evaporation part” and “margin part”, but is not distinguished by the presence or absence of a physical metal layer.
The “evaporation part” of the present invention is a part that contributes to electrostatic capacity as an electrode (or a part that is electrically connected to the electrode lead-out part) when configured as a capacitor, and the “margin part” is an electrode The portion that does not contribute to the capacitance (the portion that is not connected to the electrode even though the metal is partially attached).
Therefore, the “projection portion” (described later) is a metal layer formed in the “margin portion”, but is not included in the “metal vapor deposition layer” of the present invention. That is, the “metal vapor deposition layer” of the present invention refers to a metal layer intentionally deposited on the “vapor deposition part”.

The present invention can further employ the following configurations.
(2) It is a manufacturing method of the metallized film of the above (1),
The position where the oil is printed in the oil printing process overlaps with the outer edge position of the region where the oil is deposited in the oil vapor deposition process.

  According to the configuration of (2), the rising angle of the metal vapor deposition layer can be increased while reducing the amount of oil attached to the dielectric film.

The present invention can further employ the following configurations.
(3) In a metallized film having a vapor deposition portion where a metal vapor deposition layer is formed on the surface of the dielectric film and a margin portion adjacent to the vapor deposition portion,
The metal vapor deposition layer includes an inclined portion whose thickness decreases as it approaches the margin portion in an adjacent portion adjacent to the margin portion,
The inclined portion has a width of 1 to 100 μm,
Wherein the margin, metalized film characterized that you ridges along the edge of the metallized layer with away from the metal vapor deposition layer is formed.

  According to the structure of (3), a margin part is ensured reliably and the rising angle (rise angle of a steeply inclined part) of a metal vapor deposition layer is large. Therefore, disappearance (film receding) of the metal vapor deposition layer due to oxidative degradation in the metallized film can be suppressed.

The present invention can further employ the following configurations.
(4) A metallized film capacitor using a capacitor element in which the metallized film according to (4) is wound or laminated.

  According to the configuration of (4), a metallized film is used in which a margin is ensured, the rising angle of the rising layer of the metal vapor deposition layer is large, and the disappearance (film receding) of the metal vapor deposition layer due to oxidative degradation can be suppressed. Therefore, the reliability of the metallized film capacitor can be improved.

  According to the method for producing a metallized film of the present invention, the disappearance (film receding) of the metal vapor deposition layer due to oxidative degradation in the metallized film can be suppressed without lowering the winding property of the film.

(A) is a fragmentary sectional view which shows typically the dielectric film when an oil vapor deposition process is performed, (b) is a schematic diagram of the dielectric film when an oil printing process is performed after an oil vapor deposition process. (C) is a fragmentary sectional view which shows typically a metallized film when performing a metal vapor deposition process. (A) is a fragmentary sectional view which shows typically the dielectric film when an oil printing process is performed, (b) is a schematic diagram of the dielectric film when an oil vapor deposition process is performed after an oil printing process. FIG. (A) is a perspective view which shows the state of an oil vapor deposition process typically, (b) is the AA sectional view taken on the line. (A) is a figure which shows typically a state when the upstream side is seen from the downstream of the advancing direction of a dielectric film in the oil vapor deposition process shown to Fig.3 (a), (b) is a figure which shows FIG. It is the elements on larger scale which show typically the nozzle vicinity in sectional drawing shown in (b). (A) is a figure which shows typically the state of an oil printing process, (b) is a top view of the dielectric material film in which oil was printed by the oil printing process shown to (a). It is the figure which compared the state from before metal vapor deposition to after metal vapor deposition about the conventional method, the method by this invention, and the conventional method (oil increase). (A) is sectional drawing which shows typically an example when oil was vapor-deposited on the film in the manufacturing method of the conventional metallized film, (b) is metal vapor deposition to the film shown to (a). It is sectional drawing which shows the state when performed typically. (A) is sectional drawing which shows typically the other example when oil is vapor-deposited on the film in the manufacturing method of the conventional metallized film, (b) is metal in the film shown to (a). It is sectional drawing which shows typically a state when vapor deposition is performed. (A)-(c) is sectional drawing which shows the process of the conventional oil printing typically.

The manufacturing method of the metallized film of this invention is demonstrated using FIG.
Fig.1 (a) is a fragmentary sectional view which shows typically the dielectric material film when an oil vapor deposition process is performed. FIG. 1B is a partial cross-sectional view schematically showing a dielectric film when the oil printing process is performed after the oil vapor deposition process. FIG.1 (c) is a fragmentary sectional view which shows typically the metallized film when a metal vapor deposition process is performed.

  In the figure, 19 indicates a dielectric film, 19a indicates the surface of the dielectric film 19, 19D indicates a vapor deposition portion, and 19M indicates a margin portion. The dielectric film is not particularly limited, and examples thereof include a PP (polypropylene) film.

In the metallized film manufacturing method shown in FIG. 1, first, oil 18D is vapor-deposited on the surface 19a of the dielectric film 19, as shown in FIG. The oil 18D covers the entire area of the margin portion 19M and further covers a part of the vapor deposition portion 19D. Further, the oil 18D has a lower deposition height and a narrower deposition range than the oil 88 (FIG. 7A).
Thus, in the present invention, since oil printing is used in combination, the amount of oil deposition can be set small. The oil 18D is vapor-deposited so as to exhibit a planar view band shape extending from the near side to the far side in the drawing.

  Next, oil is printed on the surface 19a of the dielectric film 19 along the edge of the margin portion 19M. The amount of oil printed is less than the amount of oil deposited. As a result, as shown in FIG. 1B, convex portions 18a are formed on both sides of the oil 18D. In the present embodiment, the convex portion 18a is formed in the margin portion 19M.

  Here, as shown in FIG. 1B, the topmost portion of the convex portion 18a (the oil at the position where the oil is printed in the oil printing step) protrudes. FIG. 1B schematically shows an example of the shape of the oil, and does not strictly reflect the actual shape of the oil.

Next, metal deposition is performed on the dielectric film 19 shown in FIG. A conventionally well-known method can be used as metal vapor deposition.
After going through the above steps, the oil is removed by radiant heat from the evaporation source for vapor deposition, and a metallized film 10 shown in FIG. 1 (c) can be obtained. The metallized film 10 is the metallized film of the present invention.
The metallized film 10 includes a dielectric film 19 and a metal vapor deposition layer 11 formed on the surface 19 a of the dielectric film 19. The metal vapor deposition layer 11 consists of aluminum.

  The dielectric film 19 includes a margin portion 19M and a vapor deposition portion 19D. The margin portion 19M is a portion where the metal vapor deposition layer 11 is not formed. The vapor deposition part 19D is a part where the metal vapor deposition layer 11 is formed. The metal vapor-deposited layer 11 has an inclined portion 11S whose thickness decreases as it approaches the margin portion 19M in the vicinity of the margin portion 19M.

  The inclined part 11S is inclined in a curved line toward the margin part 19M. The width of the inclined portion 11S is, for example, 1 to 100 μm.

Further, the margin portion 19 </ b> M is formed with a ridge portion 12 spaced from the metal vapor deposition layer 11 and along the edge of the metal vapor deposition layer 11. The ridge portion 12 is formed on the inner side of the convex portion 18a formed on both outer edge portions of the oil 18 so as to be adjacent to the region (slit 19S) where the convex portion 18a is formed.
The edge of the metal vapor deposition layer 11 has a linear shape extending from the near side to the back side in the figure, and the protrusion 12 has a planar view band shape parallel to the edge of the metal vapor deposition layer 11. The interval between the metal vapor deposition layer 11 and the protrusion 12 is a slit 19S.

  In FIG. 1, the case where the oil vapor deposition process is performed first and then the oil printing process is described. However, in the present invention, the order of the oil vapor deposition process and the oil printing process is not limited to this example. It is good also as performing a process and performing an oil vapor deposition process after that.

Next, the case where an oil printing process is performed first and then an oil vapor deposition process is performed will be described with reference to FIG.
Fig.2 (a) is a fragmentary sectional view which shows typically the dielectric film when an oil printing process is performed. FIG. 2B is a partial cross-sectional view schematically showing the dielectric film when the oil vapor deposition process is performed after the oil printing process.

  In the metallized film manufacturing method shown in FIG. 2, first, oil 18 </ b> P is printed on the surface 19 a of the dielectric film 19 as shown in FIG. The oil 18P is printed on the margin portion 19M along the edge of the margin portion 19M. In the oil printing process of the present invention, since the area where the oil 18P is printed is small and the amount of the oil 18P is small, the lateral spread of the oil 18P can be suppressed. Therefore, the oil 18P does not have a shape as shown in FIG.

  Next, as shown in FIG. 2B, oil 18 is deposited on the surface 19 a of the dielectric film 19. The oil 18 covers the entire area of the margin portion 19M and further reaches a part of the vapor deposition portion 19D. Further, at the position where the oil 18P has been printed, the oil 18 is vapor-deposited on the oil 18P, thereby forming a convex portion 18a.

  After finishing the oil printing process shown in FIG. 2A and the oil vapor deposition process shown in FIG. 2B, metal vapor deposition is performed to remove the oil, and the oil is removed as shown in FIG. A metallized film 10 can be obtained.

  In the method for producing a metallized film of the present invention, the method for transporting the dielectric film is not particularly limited.

Next, the oil vapor deposition process and the oil printing process will be described.
First, the oil vapor deposition process will be described.
Fig.3 (a) is a perspective view which shows typically the state of an oil vapor deposition process. FIG. 3B is a cross-sectional view taken along the line AA. Fig.4 (a) is a figure which shows typically a mode when the upstream side is seen from the downstream of the advancing direction of a dielectric film in the oil vapor deposition process shown to Fig.3 (a). FIG. 4B is a partially enlarged view schematically showing the vicinity of the nozzle in the cross-sectional view shown in FIG.

  The dielectric film 19 shown in FIG. 3A is conveyed from a downstream winding roll (not shown) toward an upstream winding roll (not shown). In the figure, white arrows indicate the transport direction of the dielectric film 19. A drum-shaped oil injection roll 20 is installed near the dielectric film 19. A plurality of slit-like nozzles N are formed on the outer peripheral surface of the oil injection roll 20.

  As shown in FIGS. 3 (a) and 4 (a), the plurality of nozzles N has a drum-shaped oil jet so that the longitudinal direction of each nozzle N is perpendicular to the transport direction of the dielectric film 19. In a place closest to the surface 19 a of the dielectric film 19 on the outer periphery of the roll 20, the rolls 20 are arranged in a line at intervals. The oil injection roll 20 includes a heater (not shown). When the heater is heated, the oil O evaporates and the evaporated oil V is injected from the nozzle N.

  As shown in FIG. 3B, the evaporated oil V ejected from the nozzle N of the oil ejection roll 20 adheres to the surface 19 a of the dielectric film 19.

As shown in FIG. 4B, the oil V sprayed from the nozzle N adheres to the surface 19 a of the dielectric film 19 as the oil 18. In the figure, the dimension a indicates the distance from the nozzle N to the surface 19a of the film 19, and is, for example, 1 mm or less. The dimension b indicates the width in the longitudinal direction of the nozzle N and is, for example, about 2 to 8 mm. The dimension c indicates the width of the oil 18 on the surface 19a of the dielectric film 19, and is slightly larger than b, for example.
FIG. 4B shows a state of oil vapor deposition when oil vapor deposition is performed before oil printing, and dimensions a to c are cases where oil vapor deposition is performed after oil printing. Is the same.

Next, the oil printing process will be described.
In the present invention, printing with a rotating roll is performed in the oil printing step.
Fig.5 (a) is a figure which shows typically the state of an oil printing process. FIG. 5B is a plan view of the dielectric film 19 on which oil is printed by the oil printing process shown in FIG. In FIG. 5A, white arrows indicate the transport direction of the dielectric film 19.

  As shown in FIG. 5A, in the oil printing process, oil printing is performed on the dielectric film 19 by the printing roll 21. In the drawing, the arrow shown on the printing roll 21 indicates the roll rotation direction. On the surface of the printing roll 21, a convex portion 21 a extending in the cylindrical axis direction and a convex portion 21 b extending in the roll circumferential direction are formed.

On the upstream side of the contact position between the convex portions 21 a and 21 b and the dielectric film 19, the oil 18 adheres to these convex portions. The oil 18 is transferred to the surface 19 a of the dielectric film 19 at the contact position between the convex portions 21 a and 21 b and the dielectric film 19 as the printing roll 21 rotates.
As a result, on the surface 19a of the dielectric film 19, oil convex portions 18a and convex portions 18b (slit patterns) corresponding to the patterns of the convex portions 21a and 21b are formed, and the shape shown in FIG. Become. In the figure, 19M is a margin planned portion, and 19D is a metal vapor deposition scheduled portion.

  The metallized film 10 can be manufactured by performing a metal vapor deposition process after the oil vapor deposition process and the oil printing process described above.

  According to the method for producing a metallized film of the present invention, it is possible to reduce the oil injection amount, increase the rising angle of the metal vapor deposition layer, and sufficiently secure the margin width. it can. This point will be described with reference to FIG.

FIG. 6 is a diagram comparing the state from before metal deposition to after metal deposition in the conventional method, the method according to the present invention, and the conventional method (oil increase).
FIG. 6A shows the conventional method shown in FIG. 7, and the same parts as those in FIG. Further, the two-dot broken line is a vapor deposition oil shape before metal vapor deposition.
FIG. 6B shows the method according to the present invention shown in FIG. 1, and the same parts as those in FIG. Moreover, a dashed-dotted line is the conventional vapor deposition oil shape before metal vapor deposition, and a dashed-two dotted line is the vapor deposition oil shape before metal vapor deposition by the method which concerns on this invention.
FIG. 6 (c) shows the conventional method (oil increase) shown in FIG. 8. In FIG. 6 (c), the same parts as those in FIG. Further, the two-dot broken line is a vapor deposition oil shape before metal vapor deposition.
In FIG. 6, N indicates a nozzle.

As is clear from FIGS. 6 (a) to 6 (c), the amount of oil attached in the method of the present invention (FIG. 6 (b)) is smaller than that in the other methods (FIGS. 6 (a) and (c)). . In addition, in the method of the present invention, the rising angle of the metal vapor deposition layer in the adjacent portion adjacent to the margin portion is larger than that in other methods even though the amount of oil adhesion is small. The width W1 is approximately the same as that of the conventional method (FIG. 6A), and is sufficiently secured.
On the other hand, in the conventional method (FIG. 6A), the amount of oil deposited is larger than that in the method of the present invention (FIG. 6B), and the metal vapor deposition layer in the adjacent portion adjacent to the margin portion is increased. The rising angle is small. Further, in the conventional method (oil increase) (FIG. 6C), the margin width W2 is the largest and the amount of oil adhering is the largest.
Therefore, according to the method for producing a metallized film of the present invention, the amount of oil spray can be reduced, the rising angle of the metal vapor deposition layer can be increased, and the margin width can be minimized. Can be secured.

As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above.
In FIG. 1A, the case where the oil 18D is vapor deposited so as to cover the entire area of the margin portion 19 in the oil vapor deposition process has been described. However, the oil is vapor-deposited in the oil vapor deposition process at least over substantially the entire margin area. It suffices to cover the oil, and it is not always necessary to deposit oil over the entire margin portion only by the oil deposition process. It is only necessary that the oil covers the entire area of the margin when the oil vapor deposition process and the oil printing process are completed.

That is, in the oil vapor deposition process, the oil may be vapor deposited so that the oil covers the entire area of the margin portion when the oil vapor deposition process and the oil printing process are completed.
For example, when the oil printing process is performed after the oil vapor deposition process, the oil vapor deposition process may include a region where no oil is vapor deposited at the edge of the margin portion. In the oil printing process after the oil vapor deposition process, if oil is printed in the region, the oil covers the entire margin portion when the oil vapor deposition process and the oil printing process are completed.
On the other hand, when the oil vapor deposition process is performed after the oil printing process is performed, it is necessary that the oil covers the entire area of the margin portion when the oil vapor deposition process is completed.

  In addition, the range in which oil is deposited in the oil deposition step may reach the deposition section beyond the boundary between the margin section and the deposition section. However, the range where the oil reaches the vapor deposition part beyond the margin part is preferably as narrow as possible. It is because the slipperiness of the metallized film can be improved without reducing the winding property of the metallized film by reducing the amount of oil attached as much as possible.

  Regarding the relationship between the range where oil is printed and the range where oil is deposited, the range where oil is printed is the outer edge of the range where oil is deposited, as shown in FIG. Is outside the range where is deposited. This is because even if the oil is printed on a portion where the oil is sufficiently deposited (for example, the central portion of the oil 18D shown in FIG. 1), it does not contribute to an increase in the rising angle of the metal deposition layer.

  When at least a part of the position where the oil is printed and the position where the oil is deposited overlap, the metal deposition layer is spaced from the metal deposition layer (slit 19S shown in FIG. 1C), and the edge of the metal deposition layer Is formed (the protruding portion 12 shown in FIG. 1C).

  The position where oil is printed (position where slits are formed) is preferably a position where oil deposition due to vapor deposition decreases and vapor deposition metal begins to adhere, that is, a position where at least a part of the vapor deposited oil overlaps.

  In the embodiment described above, the case where the metal vapor deposition layer 11 is made of aluminum has been described. However, in the present invention, the metal used for forming the metal vapor deposition layer is not limited to this example. For example, zinc, nickel, copper, or These alloys can be mentioned.

  The oil in the oil vapor deposition step is not particularly limited, and examples thereof include silicone oil and fluorine oil. Examples of the silicone oil include dimethylpolysiloxane and methylphenylpolysiloxane. Examples of the fluorinated oil include perfluoroolefin and perfluoroalkyl polyether.

  Moreover, it does not specifically limit as oil of an oil printing process, For example, the oil which can be used in the oil vapor deposition process mentioned above can be mentioned. The same oil may be used in the oil vapor deposition step and the oil printing step, or different oils may be used.

  By using the metallized film described above, the metallized film capacitor of the present invention can be manufactured. The metallized film capacitor of the present invention is used by winding or laminating the metallized film of the present invention. Except for this point, a conventionally known configuration can be adopted, and a conventionally known method is used. Can be manufactured.

  Note that the present invention is not limited to the above-described example, and it is possible to make design changes as appropriate within a range that satisfies the configuration of the present invention.

DESCRIPTION OF SYMBOLS 10 Metallized film 11 Metal vapor deposition layer 11S Inclination part 11T Tip part 12 Projection part 18 Oil 18a Protrusion part 18D (Deposited) Oil 18P (Printed) Printing oil 19 Dielectric film 19a (Dielectric film 19) Surface 19D Vapor deposition part 19M Margin part 19S Slit 20 Oil injection roll 21 Oil printing roll 21a Convex part (roll cylindrical axis direction)
21a Convex part (roll circumferential direction)

Claims (4)

A method for producing a metallized film having a vapor deposition portion where a metal vapor deposition layer is formed on a surface of a dielectric film, and a margin portion adjacent to the vapor deposition portion,
An oil vapor deposition step of evaporating oil to adhere to the surface of the dielectric film and forming a margin;
An oil printing step of printing oil on the margin portion along an edge of the margin portion;
A metal vapor deposition step of forming the metal vapor deposition layer on the vapor deposition portion by performing metal vapor deposition after the oil vapor deposition step and the oil printing step;
The manufacturing method of the metallized film characterized by including.   2. The method for producing a metallized film according to claim 1, wherein a position where the oil is printed in the oil printing process overlaps with an outer edge position of a region where the oil is deposited in the oil vapor deposition process. In a metallized film having a vapor deposition portion where a metal vapor deposition layer is formed on the surface of the dielectric film, and a margin portion adjacent to the vapor deposition portion,
The metal vapor deposition layer includes an inclined portion whose thickness decreases as it approaches the margin portion in an adjacent portion adjacent to the margin portion,
The inclined portion has a width of 1 to 100 μm,
Wherein the margin, metalized film characterized that you ridges along the edge of the metallized layer with away from the metal vapor deposition layer is formed.   A capacitor element formed by winding or laminating the metallized film according to claim 3 is used.

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