Film capacitor, film, and metallized film

Patent metadata

Field	Value
Publication number	US-2023245825-A1
Application number	US-202318295588-A
Country	US
Kind code	A1
Filing date	Apr 4, 2023
Priority date	Oct 9, 2020
Publication date	Aug 3, 2023
Grant date	—

Abstract

A film capacitor that includes: a wound body in which a dielectric film and a metal layer are wound, the dielectric film including a cured product of a first organic material having a hydroxy group and a second organic material that is an aromatic compound having an isocyanate group, the dielectric film including a first main surface and a second main surface opposed to each other in a thickness direction, the metal layer being disposed at least on the first main surface of the dielectric film. The first main surface of the dielectric film includes a plurality of protrusions having the second organic material. In an area range of 100 µm by 140 µm of the first main surface of the dielectric film, a skewness of the first main surface of the dielectric film is 0.782 to 14.3.

First claim

1 . A film capacitor comprising:
a wound body in which a dielectric film and a metal layer are wound, the dielectric film including a cured product of a first organic material having a hydroxy group and a second organic material that is an aromatic compound having an isocyanate group, the dielectric film including a first main surface and a second main surface opposed to each other in a thickness direction, the metal layer being disposed at least on the first main surface of the dielectric film, wherein the first main surface of the dielectric film includes a plurality of protrusions having the second organic material, and in an area range of 100 µm by 140 µm of the first main surface of the dielectric film, a skewness of the first main surface of the dielectric film is 0.782 to 14.3.

2 . The film capacitor according to claim 1 , wherein a surface of the metal layer on an opposite side of the first main surface of the dielectric film includes a plurality of protruding parts coinciding with the plurality of the protrusions.

3 . The film capacitor according to claim 2 , wherein in an area range of 100 µm by 140 µm of the surface of the metal layer, a skewness of the surface of the metal layer is 0.562 to 13.9.

4 . The film capacitor according to claim 2 , wherein a coefficient of static friction on a side of the metal layer on the first main surface of the dielectric film is 1.4 or less.

5 . The film capacitor according to claim 2 , wherein a coefficient of static friction on a side of the metal layer on the first main surface of the dielectric film is 0.2 to 1.4.

6 . The film capacitor according to claim 1 , wherein the wound body has a flat cross section perpendicular to a scroll axis direction of the wound body.

7 . A film capacitor comprising:
a wound body in which a dielectric film and a metal layer are wound, the dielectric film including a cured product of a first organic material having a hydroxy group and a second organic material that is an aromatic compound having an isocyanate group, the dielectric film including a first main surface and a second main surface opposed to each other in a thickness direction, the metal layer being disposed at least on the first main surface of the dielectric film, wherein the first main surface of the dielectric film includes a plurality of protrusions having the second organic material, a surface of the metal layer on an opposite side of the first main surface of the dielectric film includes a plurality of protruding parts coinciding with the plurality of the protrusions, and in an area range of 100 µm by 140 µm of the surface of the metal layer, a skewness of the surface of the metal layer is 0.562 to 13.9.

8 . The film capacitor according to claim 7 , wherein a coefficient of static friction on a side of the metal layer on the first main surface of the dielectric film is 1.4 or less.

9 . The film capacitor according to claim 7 , wherein a coefficient of static friction on a side of the metal layer on the first main surface of the dielectric film is 0.2 to 1.4.

10 . The film capacitor according to claim 7 , wherein the wound body has a flat cross section perpendicular to a scroll axis direction of the wound body.

11 . A film comprising a cured product of a first organic material having a hydroxy group and a second organic material that is an aromatic compound having an isocyanate group, and including a first main surface and a second main surface opposed to each other in a thickness direction,
wherein the first main surface includes a plurality of protrusions having the second organic material, and in an area range of 100 µm by 140 µm of the first main surface, a skewness of the first main surface is 0.782 to 14.3.

12 . The film according to claim 11 , wherein a coefficient of static friction on the first main surface side is 1.0 or less.

13 . The film according to claim 11 , wherein a coefficient of static friction on the first main surface side is 0.1 to 1.0.

14 . A metallized film comprising:
a film including a cured product of a first organic material having a hydroxy group and a second organic material that is an aromatic compound having an isocyanate group, and including a first main surface and a second main surface opposed to each other in a thickness direction; and a metal layer disposed at least on the first main surface of the film, wherein the first main surface of the film includes a plurality of protrusions having the second organic material, a surface of the metal layer on an opposite side of the first main surface of the film includes a plurality of protruding parts coinciding with the plurality of the protrusions, and in an area range of 100 µm by 140 µm of the surface of the metal layer, a skewness of the surface of the metal layer is 0.562 to 13.9.

15 . The metallized film according to claim 14 , wherein
a coefficient of static friction on a side of the metal layer on the first main surface of the film is 1.4 or less.

16 . The metallized film according to claim 14 , wherein
a coefficient of static friction on a side of the metal layer on the first main surface of the dielectric film is 0.2 to 1.4.

Assignees

• Murata Manufacturing Co

Inventors

• Yamazaki Kazuto
• Inakura Tomoki

Classifications

• H01G4/14 Primary

  Organic dielectrics · CPC title

• H01B5/14

  comprising conductive layers or films on insulating-supports · CPC title

• H01B17/56

  Insulating bodies · CPC title

• H01G4/012

  Form of non-self-supporting electrodes · CPC title

• H01G4/32 Primary

  Wound capacitors · CPC title