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Polyimide-fluoropolymer insulating composite material and preparation method and application thereof

An insulating composite material, fluoropolymer technology, applied in the application, insulator, insulator and other directions, to achieve the effect of excellent scratch resistance, overcoming the difficulty of the composite process, and strong adhesion

Active Publication Date: 2020-10-30
PAN ASIAN MICROVENT TECH JIANGSU CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is to provide a method that can solve the shortcomings of polyimide such as low surface energy, lack of self-adhesiveness, and poor hydrolysis resistance in a humid environment, and overcome the problem of polytetrafluoroethylene and polyimide composite technology. Polyimide-fluoropolymer insulating composite material, preparation method and application thereof

Method used

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  • Polyimide-fluoropolymer insulating composite material and preparation method and application thereof
  • Polyimide-fluoropolymer insulating composite material and preparation method and application thereof
  • Polyimide-fluoropolymer insulating composite material and preparation method and application thereof

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Embodiment 1

[0035] 1. After the surface of the polyimide film 3 with a thickness of 25 μm is treated by double-sided corona process, the tetrafluoroethylene-hexafluoropropylene copolymer (FEP) emulsion is coated with a coating tower line, and then dried at 150°C , Sintered at 300°C to make a polyimide composite material with FEP bonding layers 2,4. The thickness of the FEP bonding layers 2 and 4 is controlled to be 5 μm.

[0036] 2. In the process of step 1, the front and back sides of the FEP / PI / FEP composite material are hot-pressed on a bimetallic roller hot-press laminating machine to laminate polytetrafluoroethylene (PTFE) films 1 and 5 with a thickness of 10 μm. The bimetallic roller adopts Electromagnetic heating method, controlling the hot pressing temperature to 300°C, the line speed to 5rpm, and the pressure to 0.5MPa to prepare a polyimide-fluoropolymer insulating composite material with a 55μm five-layer composite structure, and the composite system has strong adhesion .

Embodiment 2

[0038]1. After the surface of the polyimide film 3 with a thickness of 50 μm is treated by double-sided corona process, the tetrafluoroethylene-hexafluoropropylene copolymer (FEP) emulsion is coated with a coating tower line, and then dried at 150 °C , Sintered at 300°C to make a polyimide composite material with FEP bonding layers 2,4. The thickness of the FEP bonding layers 2 and 4 is controlled to be 10 μm.

[0039] 2. In the process of step 1, the front and back sides of the FEP / PI / FEP composite material are hot-compressed on a double-metal roller hot-press laminating machine to make a polytetrafluoroethylene / ethylene-tetrafluoroethylene copolymer composite material (PTFE) with a thickness of 15 μm. / ETFE) films 1 and 5, bimetallic rollers are heated by electromagnetic means, the hot pressing temperature is controlled at 300°C, the line speed is 8rpm, and the pressure is 0.8MPa, and a five-layer composite structure of 100μm is prepared by polyimide-fluoropolymerization Ph...

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Abstract

The invention discloses a preparation method, a preparation method and application of a polyimide-fluoropolymer insulating composite material, and the method comprises the following steps: 1) treatingthe surface of a polyimide film by a corona process, coating a fluoropolymer emulsion, and performing high-temperature drying and sintering to prepare a fluoropolymer bonding layer; 2) compounding the surface of the composite material formed in the step 1) with a fluoropolymer insulating outer layer through hot pressing of a bimetallic roller to prepare the polyimide-fluoropolymer insulating composite material of the composite structure, wherein the composite material comprises a polyimide insulating base layer, a fluoropolymer bonding layer and a fluoropolymer insulating outer layer, and atleast one side surface of the polyimide insulating base layer is connected with the fluoropolymer insulating outer layer through the fluoropolymer bonding layer. By means of the mode, the composite material can integrate the characteristics of excellent heat resistance, mechanical performance, electrical performance, water resistance, oil resistance, scratch resistance, chemical corrosion resistance and the like, and the prepared and implemented composite system is high in adhesion.

Description

technical field [0001] The invention relates to a polyimide-fluoropolymer insulating composite material, a preparation method and an application thereof. Background technique [0002] Polyimide (PI) has a very stable aromatic heterocyclic structure in its polymer main chain, which makes it exhibit excellent comprehensive properties, excellent mechanical properties, excellent high and low temperature resistance, and a wide range of operating temperatures ( -200~300℃), has excellent dielectric properties, high voltage strength, radiation resistance, corrosion resistance, and excellent flame retardancy. At present, countries have listed the research, development and utilization of polyimide materials as one of the most promising engineering plastics in the 21st century, but as electrical insulating materials, polyimide has low surface energy and lacks self-adhesiveness. The lower hydrolysis resistance is poor; in addition, the dielectric constant of polyimide is 3-3.5, which c...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B7/12B32B27/28B32B27/30B32B27/32B32B15/08B32B15/20H01B3/30H01B3/44H01B7/02H01B17/60H01B17/66H01B19/00H05K1/03B29C69/00B29C67/04B29K79/00B29L7/00B29L9/00
CPCB32B27/08B32B27/281B32B7/12B32B27/322B32B27/304B29C69/00B29C67/04H05K1/0353B32B15/08B32B15/085B32B15/20H01B19/00H01B17/60H01B17/66H01B7/0225H01B3/306H01B3/445B29L2007/00B29L2009/00B29K2079/08B32B2250/40B32B2250/24B32B2255/10B32B2255/26B32B2307/306B32B2307/73B32B2307/554B32B2307/714B32B2307/558B32B2457/08
Inventor 张云李炳健李建革丁荣华宋海明陈宇峰黄彐全雷伟花金旦郭祥
Owner PAN ASIAN MICROVENT TECH JIANGSU CORP