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A kind of preparation method of self-reducing capacitor metallized film

A metallized film and reduced technology, applied in the direction of laminated capacitors, fixed capacitor electrodes, fixed capacitor parts, etc., can solve the problems of poor conductivity, weak current carrying capacity, and decreased stability of capacitors, etc., to improve the conductivity Efficiency, improved current carrying capacity, and improved conductivity

Active Publication Date: 2019-12-03
SHANDONG ZHONGXIN ELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main technical problem to be solved by the present invention is that when the metallized film of the current capacitor is working, its internal temperature rises quickly, and the metallized film will undergo slight deformation, resulting in a sharp decline in the stability of the capacitor. In addition, the metallized film is relatively thin, and the current carrying capacity Weak, poor conductivity defects, providing a method for the preparation of metallized films for self-reducing capacitors

Method used

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  • A kind of preparation method of self-reducing capacitor metallized film

Examples

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example 1

[0026] Put 20mL of 25% silver nitrate solution and 30mL of 20% aqueous solution of trisodium citrate into a single-neck bottle, start stirring with a magnetic stirrer at 600r / min, and then add to the single-neck bottle 2mL of sodium borohydride solution with a mass fraction of 10%, stirred for 2min and allowed to stand for 2h to obtain silver seed liquid; dissolve 0.8g polyvinylpyrrolidone, 2gL ascorbic acid, 1.0g cetyltrimethylammonium bromide Add the above-mentioned silver seed liquid in deionized water and continue to add deionized water to dilute to 100 mL to obtain a reducing dispersion; take 100 mL of DMF into a beaker, move the beaker into a water bath with a magnetic stirrer, and control the water bath When the temperature is 35℃, start the magnetic stirrer, stir at 500r / min, add 5g 4,4'-diaminodiphenyl ether to the beaker, stir for 10min, then add 6g pyromellitic anhydride, stir and react for 3h to obtain Polyamic acid sol; mix the above-mentioned reducing dispersion, ...

example 2

[0028] Put 22mL of 25% silver nitrate solution and 35mL of 20% aqueous solution of trisodium citrate into a single-neck bottle, start stirring with a magnetic stirrer at 650r / min, and then add to the single-neck bottle 2mL of 10% sodium borohydride solution, stirred and reacted for 2min, and allowed to stand for 2.5h to obtain silver seed liquid; add 1.0g polyvinylpyrrolidone, 2gL type ascorbic acid, 1.2g cetyltrimethylammonium bromide Dissolve in deionized water and add the above silver seed solution, continue to add deionized water to dilute to 110mL to obtain a reducing dispersion; take 110mL of DMF into the beaker, move the beaker into a water bath with a magnetic stirrer, and control the water bath The temperature of the pot is 37℃, start the magnetic stirrer, stir at 520r / min, add 6g 4,4'-diaminodiphenyl ether to the beaker, stir for 12min, then add 7g pyromellitic anhydride, stir for 3.5h , The polyamic acid sol is obtained; the above-mentioned reducing dispersion, nano ...

example 3

[0030] Put 25mL silver nitrate solution with 25% mass fraction and 40mL aqueous solution of trisodium citrate with 20% mass fraction into a single-neck bottle, start stirring with a magnetic stirrer at 700r / min, and then add to the single-neck bottle 3mL sodium borohydride solution with a mass fraction of 10%, stirred and reacted for 3min, and allowed to stand for 3h to obtain silver seed liquid; dissolve 1.2g polyvinylpyrrolidone, 3gL type ascorbic acid, 1.5g cetyltrimethylammonium bromide Add the above-mentioned silver seed liquid in deionized water, continue to add deionized water to dilute to 120mL to obtain a reducing dispersion; take 120mL of DMF into a beaker, move the beaker into a water bath with a magnetic stirrer, and control the water bath The temperature is 40℃, start the magnetic stirrer, stir at 550r / min, add 7g 4,4'-diaminodiphenyl ether to the beaker, stir for 15min, then add 8g pyromellitic anhydride, stir and react for 4h to obtain Polyamic acid sol; mix the ...

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Abstract

The invention, which belongs to the technical field of metallized film preparation, discloses a preparation method of an automatic recovery type capacitor metallized film. When a capacitor metallizedfilm works, the temperature rises slowly and thus the adhesion stress between resin matrixes is reduced, so that the current carrying capacity of the metallized film is improved. According to the invention, because conductive particles are uniformly dispersed in the polyimide resin matrixes, strong mechanical interlocking forces are caused. The self-metallization is realized as follows: during thethermal processing process of the film, the formed metal film is uniform and compact under the circumstance that no reducing agent is added to the internal silver compound and thus the capacitor formed by the film has high stability; conductive silver powder particles and nano graphite powder in the metallized film have discontinuous phases and the metallized film can expand when working becauseof the thermal expansion characteristic of the nano graphite powder, so that the metallized film makes micro deformation when being heated and can restore to the original shape and thickness automatically. The preparation method has the broad application prospects.

Description

Technical field [0001] The invention discloses a method for preparing an automatic reduction capacitor metalized film, which belongs to the technical field of metalized film preparation. Background technique [0002] Depending on the medium, there are many types of capacitors, such as: electrolytic capacitors, paper capacitors, film capacitors, ceramic capacitors, mica capacitors, air capacitors, etc. However, electrolytic capacitors and film capacitors are the most frequently used in audio equipment. Electrolytic capacitors are mostly used in places that require a large amount of capacitance, such as the filter capacitor of the main power supply part, in addition to filtering, and also for storing electric energy. Film capacitors are widely used in cross-connection of analog signals and bypass of power supply noise. Film capacitors are capacitors in which metal foil is used as the electrode, and plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G4/33H01G4/005C08G73/10
CPCC08G73/1071H01G4/005H01G4/33
Inventor 汪逸凡何伟仁陈可
Owner SHANDONG ZHONGXIN ELECTRONICS MATERIAL
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