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Ultra-thin type polyester film for capacitor and production method thereof

A polyester film, ultra-thin technology, used in fixed capacitor parts and other directions, can solve problems such as large production capacity, poor thermal performance of the film, and low production line speed

Active Publication Date: 2012-07-11
SHANGHAI ZIDONG CHEM MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relatively speaking, these processes have good film forming stability. At the same time, due to the fast casting speed (generally above 80m / min), the production line speed is fast and the production capacity is large.
The difficulty in the preparation of ultra-thin capacitor polyester film lies in the fact that the speed of the production line is low due to the slow speed of the casting sheet, and the second is that the thickness tolerance is difficult to reach within 4%, the thermal performance of the film is not good, and the electrical weakness of the film control, etc.

Method used

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  • Ultra-thin type polyester film for capacitor and production method thereof
  • Ultra-thin type polyester film for capacitor and production method thereof
  • Ultra-thin type polyester film for capacitor and production method thereof

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Such as figure 1 As shown, the present invention will be further described in conjunction with the examples, but the present invention is by no means limited to these examples.

[0021] Implementation 1: Preparation of special slices:

[0022] 4000-4500PPM SiO with an average particle size of 100nm 2 After surface treatment, 250-280PPM magnesium acetate is added, and the two are stirred together by high-speed centrifugal and assisted by ultrasonic waves, uniformly dispersed in ethylene glycol to form a slurry, and then esterified, polycondensed, cast belt, Pelletizing to obtain modified PET slices, in which SiO 2 The average particle size is 1.0um.

[0023] Additive pre-mixing process:

[0024] ①Premixing→ ②Grinding→③Filtration→④Concentration confirmation,

[0025] Wherein step ①: SiO 2 Pre-prepared into 15% EG slurry, stirred at ...

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Abstract

The invention discloses an ultra-thin type biaxially-oriented polyester film for a capacitor. The polyester film slice contains nano-level spherical SiO2 with the added amount being 4000-4500PPM and a metal acetate with the added amount being 250-280PPM, wherein the average particle size of the nano-level spherical SiO2 is 1mum, and the metal acetate is magnesium acetate. The invention also provides a production method of the ultra-thin type biaxially-oriented polyester film for the capacitor, which comprises a step for preparing polyester slices and a step for preparing the biaxially-oriented polyester film. The polyester film has the performances such as uniform thickness, excellent dielectric performance and excellent heat stability, and can be used as a base material of the capacitor.

Description

technical field [0001] The invention relates to a biaxially stretched polyester film and a production method thereof, belonging to the technical field of composite materials. Specifically, it relates to an ultra-thin polyester film used as a substrate for microcapacitors and a production method thereof. Background technique [0002] Biaxially oriented polyester film, due to its excellent physical and mechanical properties, electrical insulation properties, barrier properties, heat resistance, optical properties and dimensional stability, etc., polyester film has become the second main application of polyester. It is used in the fields of tape, packaging, photosensitive, electrical insulation, printing, drawing, labeling, etc. With the increasing application of polyester film, the introduction of certain properties of ordinary polyester film cannot meet the application in some special fields, and the market urgently needs functional polyester film with some special functions...

Claims

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Application Information

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IPC IPC(8): C08L67/00C08L67/02C08K13/02C08K3/36C08K5/098C08G63/183B29C55/14H01G4/002
Inventor 陈国刚张萍张志远
Owner SHANGHAI ZIDONG CHEM MATERIALS
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