Flexible electric heating demisting optical film and preparation method thereof

Abstract

The invention provides a flexible electric heating demisting optical film which comprises a first transparent base film, a second transparent base film, a first transparent conductive priming coat, a second transparent conductive priming coat, a transparent electric heating layer, a pressure-sensitive adhesive layer and a release film which are stacked with one another, and the first transparent conductive priming coat is formed on one side of the first transparent base film; a second transparent conductive bottom coating is formed on one side, opposite to the first transparent conductive bottom coating, of the second transparent base film, a transparent electric heating layer is arranged between the first transparent conductive bottom coating and the second transparent conductive bottom coating, a pressure-sensitive adhesive layer is formed on the other side of the second transparent base film, and a release film is adhered to the pressure-sensitive adhesive layer. The flexible electric heating demisting optical film is good in transparency and conductivity, simple in manufacturing process and capable of saving cost. The invention further provides a preparation method of the flexible electric heating demisting optical film.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a flexible electric heating defogging optical film and a preparation method thereof. Background technique [0002] In daily life, people often encounter fogging phenomenon caused by temperature difference, such as bathroom mirrors, car windows, glasses, shop windows and other scenes often have fogging phenomenon; in the case of fogging, it will reduce the clarity of people's vision , it may bring inconvenience to the user experience, and it may be a safety hazard if it is serious. To solve such problems, many solutions have been proposed. The easiest way is to apply "soapy water" (surfactant) on the fogging substrate (usually glass or transparent plastic), which can have an anti-fog effect in a short time (several hours); Water-based anti-fog coatings or UV-curable anti-fog coatings can be applied to the material, and the anti-fog effect can be achieved for about one ...

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Problems solved by technology

The method used in patents CN104883760B and CN105517215B is to directly glue the conductive layer of graphene or carbon nanotubes on the film with UV glue. This method requires electrode bus bars, the structure and process flow are very complicated, and the cost is very high

The method adopted in the patent CN106941736A is to make graphene into a dispersion liquid and apply it on the film. This method has a simple process, but the electric heating stability is very poor, the life is very poor, and the actual preparation feasibility is not high.

The method used in patents CN107995704A and CN110536492A is to mix conductive materials with graphene as the main component and adhesive, and coat them on the film. This method has the highest feasibility in actual preparation, but the structure design of each layer of the disclosed patents has not been optimized, and transparency cannot be achieved. sex

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