PET compound of heat aging-resistant insulating film and preparation method thereof

Abstract

The invention relates to a PET compound of a heat and ageing resistant insulation film. Raw materials of the PET compound comprise, by mass, 100 parts of PET resin slices, 0.1-1.0 part of a nanoparticle nucleating agent, 10-15 parts of ultrafine nylon powder, 0.1-1.0 part of ammonium polyphosphate, 1-10 parts of pentaerythritol and 1-6 parts of triphenyl phosphite, wherein the nanoparticle nucleating agent is a silane coupling agent with the content of 4-6%, the silane coupling agent comprises a fluorine-containing silane coupling agent and an active silane coupling agent according to a mass part ratio of 0.6-1.2:1, and the ultrafine nylon powder is 600-2000 mesh nylon powder. The method has simple process flow, the dispersibility of the nanometer inorganic particle nucleating agent is easy to regulate, and the PET compound has excellent high temperature and ageing resistance.

Description

technical field [0001] The invention relates to a PET composite of a heat-resistant aging insulating film and a preparation method thereof, belonging to the technical field of polyester film manufacture. Background technique [0002] PET (polyethylene terephthalate) is a crystalline polymer with excellent creep resistance, fatigue resistance, friction resistance, wear resistance, chemical resistance, dimensional stability, gas and Low water vapor permeability, excellent electrical insulation, widely used in automotive, electrical and electronic, insulating materials and other fields. Biaxially oriented PET film has excellent physical and mechanical properties in a wide temperature range. It can be used at 120°C for a long time, and can withstand high temperatures of 150°C for short-term use. It is widely used in plate making, packaging, optical, and insulating films. In recent years, along with the development of electrical or electronic components, capacitor films or motor...

AI Technical Summary

Problems solved by technology

[0009] As a known method to improve the heat resistance of PET, a small amount of (auxiliary) antioxidant, heat stabilizer, nucleating agent, etc. are not easy to disperse uniformly

Due to high extrusion temperature (above 280°C), additives such as antioxidants are partially decomposed during processing, and migrate and precipitate during film making. The effect is not obvious enough and the operability is poor, which affects the long-term heat resistance of the film. oxygen performance

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