▎ 摘　　要

NOVELTY - Waterproof graphene heating sheet comprises an insulating carrier film (10) with a printing surface (11) and a silver paste coating is printed on the printed surface of the insulating carrier film, where the silver paste coating includes a positive electrode pattern and a negative electrode pattern that are not directly electrically connected to each other. The positive electrode pattern is integrally formed with multiple positive electrode wires (21) and a first bus bar (23) connecting the positive electrode wires. The negative electrode pattern is integrally formed with multiple negative electrode wires and a second bus bar (24) connecting the negative electrode wires. The positive electrode line and negative electrode line are arranged at equal intervals. The positive electrode line has a first end point (25) facing the second bus bar. The negative electrode wire has a second end point facing the first bus bar. USE - Waterproof graphene heating sheet. ADVANTAGE - The waterproof graphene heating sheet ensures normal and uniform heating in the heat opening and improves the side of the graphene heating sheet, where the edge waterproof performance also increases the installation margin of the graphene heating coating. DETAILED DESCRIPTION - Waterproof graphene heating sheet comprises an insulating carrier film (10) with a printing surface (11) and a silver paste coating is printed on the printed surface of the insulating carrier film, where the silver paste coating includes a positive electrode pattern and a negative electrode pattern that are not directly electrically connected to each other. The positive electrode pattern is integrally formed with multiple positive electrode wires (21) and a first bus bar (23) connecting the positive electrode wires. The negative electrode pattern is integrally formed with multiple negative electrode wires and a second bus bar (24) connecting the negative electrode wires. The positive electrode line and negative electrode line are arranged at equal intervals. The positive electrode line has a first end point (25) facing the second bus bar. The negative electrode wire has a second end point facing the first bus bar. A waterproof coating (30) is printed on the printing surface of the insulating carrier film. A graphene heating coating (50) is selectively printed on the printing surface of the insulating carrier film and insulated on the bonding surface of the coating film. An INDEPENDENT CLAIM is included for a method for preparing a waterproof graphene heating sheet. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic partial cross-sectional view of the graphene heating sheet. Insulating carrier film (10) Printing surface (11) Positive electrode wires (21) Bus bars (23,24) End point (25) Waterproof coating (30) Graphene heating coating (50)