Waterproof graphene heating sheet and preparation method thereof

Abstract

The invention relates to a waterproof graphene heating sheet and a preparation method thereof. The heating sheet comprises an insulating carrier film, a silver paste coating printed on the carrier film, a waterproof coating printed on the carrier film, a graphene heating coating selectively printed on the carrier film or a covering film, and an insulating covering film pressed on the carrier film.The waterproof coating covers bus bars of the silver paste coating, the waterproof coating is provided with a heating opening, positive and negative electrode wires of the silver paste coating are exposed, the graphene heating coating continuously covers the positive and negative electrode wires and the interval part between the positive and negative electrode wires through the heating opening, alow-resistance area generated by a short contact path and the adjacent bus bar at the end points of the positive and negative electrode wires is eliminated, normal and uniform heating in the heatingopening is ensured, the side edge waterproof performance of the graphene heating sheet can be improved, and the installation margin of the graphene heating coating is also increased.

Description

technical field [0001] The invention relates to the technical field of graphene heating, in particular to a waterproof graphene heating sheet and a preparation method thereof. Background technique [0002] The thin film heating sheet that uses graphene film to generate heat is more suitable for human body use and has environmental protection characteristics that can be reused. It is thin and easy to paste. Attached to use and miniaturized, it can be easily carried or attached to clothing. Existing heating sheet technology and products on the market generally have the quality problem of not being able to generate heat evenly and easily scalding the human body during use. One of the main reasons is that the offset of the installation position of the graphene film layer causes a short circuit to contact the low-resistance area of ​​the bus bar, and the product is prone to abnormal heating during use. Therefore, the installation margin of the graphene film layer is very small, ...

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a waterproof graphene heating sheet, in addition to solving the problem of water damage to the graphene heating sheet, and at the same time solving the problem that the graphene film layer installation margin is too small in the production process of the graphene heating sheet The problem of local overheating damage caused by the product

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