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Polytetrafluoroethylene (PTFE) base electrothermal thick film and manufacturing method thereof

A polytetrafluoroethylene and polytetrafluoroethylene technology, which is used in the field of polytetrafluoroethylene based electric heating thick film, can solve the problems of thin carbon film electric heating film not being able to withstand high pressure, unable to make thick electric heating film, rapid aging and so on

Inactive Publication Date: 2012-12-12
CIXI SOVONO ELECTRIC APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, carbon film electric heating film is more and more common for heating, but carbon film electric heating film products have many limitations in application, and are only suitable for low-voltage and ultra-low-voltage currents or for batteries or for adapters after transformers. Carbon film electric heating film products are not suitable for high voltage or mains voltage and current; in addition, the current carbon film electric heating film printed on the carrier is a thin electric heating film, and its maximum thickness is about 0.1mm, which cannot Make thick electric heating film, thin carbon film electric heating film is not resistant to high voltage, thin carbon film electric heating film is easy to catch fire and burn after high voltage electric shock, and the leakage current is too large when electrified, and there are redness and burning. Low mechanical strength, not resistant to vibration, weak thermal shock resistance, resulting in thin carbon film electric heating film falling off, short circuit and sparking, the line conduction performance is reduced, and it is easy to ablate
The stability and reliability of its products cannot be guaranteed, resulting in the shortcomings of the thin carbon film electric heating film heating material, such as serious power attenuation and rapid aging after high voltage or mains voltage is energized.

Method used

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  • Polytetrafluoroethylene (PTFE) base electrothermal thick film and manufacturing method thereof
  • Polytetrafluoroethylene (PTFE) base electrothermal thick film and manufacturing method thereof
  • Polytetrafluoroethylene (PTFE) base electrothermal thick film and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Get 24 grams of phosphorus flake graphite, 8 grams of acetylene black, 6 grams of carbon fiber powder, 5 grams of short carbon fiber, 6 grams of nickel powder, 6 grams of silver powder, 2 grams of manganese dioxide, and 2 grams of ferric oxide to prepare materials, put them in the grinding Machine mill for 1 hour to make a homogeneous mixture.

[0022] After grinding, the homogeneous mixture is mixed with 2 grams of the carbon black dispersant, 22 grams of polytetrafluoroethylene dispersion, and 15 grams of polytetrafluoroethylene diluent by weight percentage, and is dispersed by ultrasonic wave for 2 hours to prepare polytetrafluoroethylene Paste for vinyl heating thick film.

[0023] The components of the PTFE-based electric heating thick film in Example 1 are calculated based on the optimal weight ratio of its internal structure.

Embodiment 2

[0025] Get 26 grams of phosphorus flake graphite, 10 grams of acetylene black, 6 grams of carbon fiber powder, 6 grams of short carbon fiber, 7 grams of nickel powder, 7 grams of silver powder, 3 grams of manganese dioxide, and 3 grams of ferric oxide to prepare materials, put them in the grinding Machine mill for 1 hour to make a homogeneous mixture.

[0026] After grinding, the homogeneous mixture is mixed with 3 grams of the carbon black dispersant, 24 grams of polytetrafluoroethylene dispersion, and 18 grams of polytetrafluoroethylene diluent by weight percentage, and ultrasonic dispersion is used for 2 hours to prepare polytetrafluoroethylene Paste for vinyl heating thick film.

[0027] The components of the PTFE-based electric heating thick film in Example 2 are calculated based on the optimal weight ratio of its internal structure.

Embodiment 3

[0029] Get 28 grams of phosphorus flake graphite, 12 grams of acetylene black, 7 grams of carbon fiber powder, 6 grams of short carbon fiber, 7 grams of nickel powder, 7 grams of silver powder, 3 grams of manganese dioxide, and 3 grams of ferric oxide to prepare materials, put them in the grinding Machine mill for 1 hour to make a homogeneous mixture.

[0030] After grinding, the homogeneous mixture is mixed with 3 grams of carbon black dispersant, 24 grams of polytetrafluoroethylene dispersion, and 20 grams of polytetrafluoroethylene diluent by weight percentage, and is dispersed by ultrasonic wave for 2 hours to prepare polytetrafluoroethylene Paste for vinyl heating thick film.

[0031] The components of the polytetrafluoroethylene-based electric heating thick film in Example 3 are calculated based on the optimal weight ratio of its internal structure.

[0032] The process steps for manufacturing the above-mentioned polytetrafluoroethylene-based electric heating thick film...

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Abstract

The invention discloses a polytetrafluoroethylene (PTFE) base electrothermal thick film, comprising the following materials according to percentage by weight: 20-30% of flake graphite, 8-15% of acetylene black, 5-8% of carbon fiber powder, 4-6% of short carbon fiber, 5-8% of nickel powder, 5-8% of silver powder, 1-3% of manganese dioxide, 1-3% of iron sesquioxide, 1-3% of carbon black dispersant, 20-25% of PTFE dispersion liquid and 10-25% of PTFE diluent. The invention also discloses a manufacturing method of the PTFE base thick film, comprising the steps of grinding and uniformly mixing the flake graphite, the acetylene black, the carbon fiber powder, the short carbon fiber, the nickel powder, the silver powder, the manganese dioxide and the iron sesquioxide according to the proportion, mixing and ultrasonically dispersing the mixture, the carbon black dispersant, the PTFE dispersion liquid and the PTFE diluent according to the proportion to prepare a electrothermal thick film paste, and drying and sintering the electrothermal thick film paste, after a through printing process so as to manufacture the PTFE base electrothermal thick film. The manufacturing method provided by the invention is applicable to high-voltage electrothermal equipment, good in stability and using effect, and is not demoulded.

Description

technical field [0001] The invention relates to a polytetrafluoroethylene-based electric heating thick film and a manufacturing method thereof, belonging to a manufacturing method of an electric heating device. In particular, it relates to a polytetrafluoroethylene-based electric heating thick film which adopts a stainless steel screen plate for printing and depositing. Background technique [0002] At present, in many fields such as household appliances and industrial appliances, electric heating products are more and more widely used. Among them, carbon film electric heating film is more and more common for heating, but carbon film electric heating film products have many limitations in application, and are only suitable for low-voltage and ultra-low-voltage currents or for batteries or for adapters after transformers. Carbon film electric heating film products are not suitable for high voltage or mains voltage and current; in addition, the current carbon film electric he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/12C08L27/18C08K13/04C08K3/04C08K7/06C08K3/08C08K3/22
Inventor 周挺
Owner CIXI SOVONO ELECTRIC APPLIANCE
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