A kind of preparation method of antibacterial composite film material

Abstract

The invention discloses a preparation method of an antibacterial composite film material, which relates to the field of plastic films, including raw material mixing, polyamic acid / ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Precursor preparation, film laying, composite film preparation and drying are five processes. In this preparation method, the hydrothermal method is used to prepare the sol, which avoids the need for wet chemical methods to convert hydroxides into oxides after calcination. The step of forming hard agglomerates saves time and improves efficiency, and the preparation effect is good, and no other impurities or derivative substances are produced. In the film laying process, the film formation speed is fast by strictly controlling the temperature and holding time in the oven. The film quality is good, the mechanical strength is high, and it is not easy to break. After the final drying process, the composite film prepared has excellent performance, has a local network distribution structure, excellent physical properties and dielectric properties, and significant corona resistance. In the power industry, the cable insulation performance is required, the service life is long, and the production process is stable.

Description

technical field [0001] The invention relates to the field of plastic film manufacture, in particular to a method for preparing an antibacterial composite film material. Background technique [0002] In recent years, people have paid more and more attention to the application of variable frequency motors, but at the same time as this new technology is adopted, a troublesome problem has emerged one after another: in the pulse width modulation variable frequency drive system, due to the wave reflection of the long cable, the motor The overvoltage generated on the terminal, coupled with the extremely uneven distribution of the pulse voltage on the winding group, makes the inter-turn voltage of the winding near the head end tens of times higher than the average distribution voltage, resulting in corona discharge between the winding turns, thus Make the motor insulation break down prematurely. Practice has shown that adding a certain amount of inorganic nano-oxides to the existing...

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Problems solved by technology

[0002] In recent years, people have paid more and more attention to the application of variable frequency motors, but at the same time as this new technology is adopted, a troublesome problem has emerged one after another: in the pulse width modulation variable frequency drive system, due to the wave reflection of the long cable, the motor The overvoltage generated on the terminal, coupled with the extremely uneven distribution of the pulse voltage on the winding group, makes the inter-turn voltage of the winding near the head end tens of times higher than the average distribution voltage, resulting in corona discharge between the winding turns, thus Make the motor insulation break down prematurely. Practice has shown that adding a certain amount of inorganic nano-oxides to the existing high heat-resistant insulating materials can greatly improve the high-temperature resistance of the original polymer while maintaining the high-temperature performance of the polymer. The corona resistance performance of insulating materials can meet the operation requirements of variable frequency motors and ensure the life of variable frequency motors. Therefore, it is of great significance to study motor winding insulation materials with good corona resistance performance. The application number is CN201210107660.0, which discloses a Low-density composite film, including the following components by mass percentage: polyethylene tree 86-92%, linear low-density polyethylene resin 7-12%, additives 1-2%

The low-density composite film of the present invention not only has excellent electrical insulation performance, but also has good mechanical properties, which is mainly reflected in that it not only has the good softness, extensibility and transparency of the low-density composite film, but also has linear low-density composite film. The film has high tensile strength, impact resistance, puncture strength and low temperature impact resistance, and is resistant to oxygen and light aging. It can be used as a coating material for wires and cables in harsh environments, but this composite film also has corona resistance. The problem of poor performance, and the mechanical strength is not high, it is easy to be damaged during use, and the service life is restricted

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