Biaxially oriented polypropylene film, metalized film, and film capacitor

A polypropylene film, biaxially oriented technology, used in capacitors, fixed capacitor dielectrics, fixed capacitor components, etc., can solve the problems of reduced capacitor life, deterioration of vibration characteristics, and high adhesion, and achieve excellent vibration characteristics. , The effect of high withstand voltage and suitable component processability

Active Publication Date: 2013-03-06
TORAY IND INC
View PDF14 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the mechanical and chemical methods, the roughness density is low, and in the method of stretching the β-crystal sheet, coarse protrusions are likely to be generated.
Moreover, the film whose surface is roughened by these methods has the following problems: the gap between the film layers becomes uneven, and corona discharge is likely to occur when an AC voltage is applied at the portion where the gap is enlarged due to the coarse protrusion, and the l

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Biaxially oriented polypropylene film, metalized film, and film capacitor
  • Biaxially oriented polypropylene film, metalized film, and film capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0198] A polypropylene resin ("Borclean (registered trademark)" manufactured by Borealis Co., Ltd.) having an isotactic pentad fraction of polypropylene of 0.985 and a melt mass flow rate (MFR) of 2.6 g / 10 minutes, and internal 3 A branched polypropylene resin (Profax PF-814 manufactured by Basell Co., Ltd., a high melt tension polypropylene) having 3 substituted olefins per 10,000 carbon atoms was mixed. The content of the branched polypropylene resin was 0.5 mass % with respect to the whole mixed resin. This mixed resin was supplied to an extruder having a temperature of 260° C., and was melt-extruded into a sheet form through a T-slot die at a resin temperature of 255° C. This molten sheet was cooled and solidified on a cooling drum with a diameter of 1.2 m maintained at 60°C. The retention time at 115 to 135° C. was 2 seconds as a result of measurement by a radiation thermometer.

[0199] Next, the cooled and solidified sheet was preheated at 130° C., and stretched 4.6 t...

Embodiment 2

[0202] Film formation was carried out in the same manner as in Example 1, except that the stretching ratio in the longitudinal direction performed after biaxial stretching was 0.5%, to obtain a biaxially oriented polypropylene film. Tables 2 and 3 show properties of the obtained biaxially oriented polypropylene film.

Embodiment 3

[0204] Film formation was carried out in the same manner as in Example 1, except that the cooling drum temperature was 80°C, to obtain a biaxially oriented polypropylene film. The holding time at 115 to 135° C. during cooling and solidification was 2.4 seconds as a result of measurement by a radiation thermometer. Tables 2 and 3 show properties of the obtained biaxially oriented polypropylene film.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to view more

Abstract

Disclosed is a biaxially oriented polypropylene film which has projections on both surfaces of the film. The most common height (PhZ) of the projections among the projections on each surface is 100 nm or more but less than 400 nm on each surface, and the number of projections (Pc) per 0.1 mm2 of each surface is 150 projections or more but less than 500 projections on each surface. The biaxially oriented polypropylene film is easily processed into an element, and provides a capacitor that has high withstand voltage and excellent squealing characteristics when processed into a capacitor.

Description

technical field [0001] This invention relates to biaxially oriented polypropylene films suitable for capacitor applications. More specifically, it relates to a biaxially oriented acrylic film that is easy to process as an element, and can obtain a capacitor with high withstand voltage and low squeeling when processed into a capacitor. Hereinafter, the characteristics of such a biaxially oriented propylene film are respectively referred to as device processability, voltage resistance, and squealing characteristics. Background technique [0002] Polypropylene films are widely used for electrical applications due to reasons such as excellent electrical characteristics. Among them, the development as a dielectric material in capacitor applications is remarkable. In recent years, demands for miniaturization and cost reduction have been strong, and the thickness reduction of the dielectric film has been progressing. In addition, the requirements for withstand voltage characteri...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01G4/18B29C55/12C08J5/18
CPCH01G2/00C08J5/18H01G4/18B29K2023/12C08J2323/12B29K2995/0072B29C55/12Y10T428/24355
Inventor 水岛正美冈本克哉浅野哲也
Owner TORAY IND INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap