Stuffing for capacitor and preparation method thereof

Abstract

The invention relates to a stuffing for a capacitor. The stuffing for the capacitor, according to the quality percentage, comprises 20% to 40% of vegetable oil, 2% to10% of paraffin, 45% to75% of stuffing, and 0.5% to 5% of vegetable oil antioxidant additives. The preparation method of the stuffing for the capacitor includes the following procedures: the vegetable oil is heated up to 80 DEG C to 120 DEG C, is under vacuum treatment at least 8 hours, then breaking the vacuum, is added into vegetable oil antioxidant additives, and is under vacuum treatment again at least 8 hours with the temperature keeping in the range of 80 DEG C to 120 DEG C. The paraffin is heated up to 70 DEG C to 120 DEG C to melt. The stuffing for the capacitor can be obtained through mixing the vegetable oil after the heat treatment, melted paraffin and the stuffing together. The stuffing for the capacitor has electrical performance and physics and chemistry performance.

Description

technical field

[0001] The invention relates to the field of capacitors, in particular to a filling material for capacitors and a preparation method thereof. Background technique

[0002] Metallized plastic film capacitors, including polyester and polycarbonate metallized capacitors, have been used in DC circuits for over 20 years.

[0003] Replacing the paper foil structure with metallized polypropylene can reduce the capacitor size and improve its performance. This type of capacitor is usually about half smaller than the corresponding foil structure, and its dielectric loss is small, which can eliminate the common thermal failure phenomenon in the foil structure and save energy.

[0004] CBB65 type capacitor is a metallized polypropylene film motor running capacitor. It uses metallized polypropylene film as the medium, is tightly rolled by a high-speed winding machine, and is packaged in an aluminum shell. It is a non-polar capacitor with a negative temperature coefficien...

Examples

Embodiment 1

[0056] (1) Heat up 20g of castor oil to 80°C, vacuum-treat for 15 hours, then break the vacuum, add 1g of tocopherol, 1g of ferulic acid and 1g of tea polyphenols, and vacuum-treat again at 120°C for 8 hours;

[0057] (2) Heat 2g of paraffin to 70°C to melt it;

[0058] (3) mixing the vegetable oil obtained in step (1), the melted paraffin wax obtained in step (2) and 75 g of microsilica powder with a particle size of 0.2 to 1 μm to obtain a filler for capacitors;

[0059] (4) Use the filling material obtained in step (3) for the filling of CBB65 aluminum shell capacitors.

[0060] Table 1 shows the test results of fillers for capacitors.

Embodiment 2

[0062] (1) Heat 40g of rapeseed oil to 120°C, vacuum for 8 hours, then break the vacuum, add 2g of BHA and 3g of BHT, and vacuum again at 80°C for 16 hours;

[0063] (2) Heat 10g of paraffin to 120°C to melt it;

[0064] (3) mixing the vegetable oil obtained in step (1), the melted paraffin wax obtained in step (2), and 45 g of talcum powder with a particle size of 0.1 to 0.4 μm to obtain a filler for capacitors;

[0065] (4) Use the filling material obtained in step (3) for the filling of CBB65 aluminum shell capacitors.

[0066] Table 1 shows the test results of fillers for capacitors.

Embodiment 3

[0068] (1) Heat 30g of corn oil to 100°C, vacuum treatment for 10 hours, then break the vacuum, add 0.5g of sesamol, and vacuum again at 110°C for 9 hours;

[0069] (2) Heat 4g of paraffin to 110°C to melt it;

[0070] (3) Mix the vegetable oil obtained in step (1), the melted paraffin wax obtained in step (2), 60g of talc powder with a particle size of 0.5~0.7μm, and 5.5g of mica powder with a particle size of 0.6~0.8μm to obtain a capacitor with filler;

[0071] (4) Use the filling material obtained in step (3) for the filling of CBB65 aluminum shell capacitors.

[0072] Table 1 shows the test results of fillers for capacitors.

technical field

[0001] The invention relates to the field of capacitors, in particular to a filling material for capacitors and a preparation method thereof. Background technique

[0002] Metallized plastic film capacitors, including polyester and polycarbonate metallized capacitors, have been used in DC circuits for over 20 years.

[0003] Replacing the paper foil structure with metallized polypropylene can reduce the capacitor size and improve its performance. This type of capacitor is usually about half smaller than the corresponding foil structure, and its dielectric loss is small, which can eliminate the common thermal failure phenomenon in the foil structure and save energy.

[0004] CBB65 type capacitor is a metallized polypropylene film motor running capacitor. It uses metallized polypropylene film as the medium, is tightly rolled by a high-speed winding machine, and is packaged in an aluminum shell. It is a non-polar capacitor with a negative temperature coefficien...

Examples

Embodiment 1

[0056] (1) Heat up 20g of castor oil to 80°C, vacuum-treat for 15 hours, then break the vacuum, add 1g of tocopherol, 1g of ferulic acid and 1g of tea polyphenols, and vacuum-treat again at 120°C for 8 hours;

[0057] (2) Heat 2g of paraffin to 70°C to melt it;

[0058] (3) mixing the vegetable oil obtained in step (1), the melted paraffin wax obtained in step (2) and 75 g of microsilica powder with a particle size of 0.2 to 1 μm to obtain a filler for capacitors;

[0059] (4) Use the filling material obtained in step (3) for the filling of CBB65 aluminum shell capacitors.

[0060] Table 1 shows the test results of fillers for capacitors.

Embodiment 2

[0062] (1) Heat 40g of rapeseed oil to 120°C, vacuum for 8 hours, then break the vacuum, add 2g of BHA and 3g of BHT, and vacuum again at 80°C for 16 hours;

[0063] (2) Heat 10g of paraffin to 120°C to melt it;

[0064] (3) mixing the vegetable oil obtained in step (1), the melted paraffin wax obtained in step (2), and 45 g of talcum powder with a particle size of 0.1 to 0.4 μm to obtain a filler for capacitors;

[0065] (4) Use the filling material obtained in step (3) for the filling of CBB65 aluminum shell capacitors.

[0066] Table 1 shows the test results of fillers for capacitors.

Embodiment 3

[0068] (1) Heat 30g of corn oil to 100°C, vacuum treatment for 10 hours, then break the vacuum, add 0.5g of sesamol, and vacuum again at 110°C for 9 hours;

[0069] (2) Heat 4g of paraffin to 110°C to melt it;

[0070] (3) Mix the vegetable oil obtained in step (1), the melted paraffin wax obtained in step (2), 60g of talc powder with a particle size of 0.5~0.7μm, and 5.5g of mica powder with a particle size of 0.6~0.8μm to obtain a capacitor with filler;

[0071] (4) Use the filling material obtained in step (3) for the filling of CBB65 aluminum shell capacitors.

[0072] Table 1 shows the test results of fillers for capacitors.

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