▎ 摘　　要

NOVELTY - Mica tape comprises mica paper layer (5) and reinforcing fiber fabric layer (2). The mica paper layer is formed on one side surface of the reinforced fiber fabric layer between the mica paper layer and the reinforcing fiber fabric layer, and a lattice hole is uniformly opened on the modified polyimide film (3). The surface of both sides of the modified polyimide film is coated with a sizing material penetration inhibitor layer, and the outer surface of the sizing material penetration inhibitor layer is correspondingly sprayed with an adhesive powder layer. The adhesive powder layer is molded into an adhesive layer (4) by hot pressing, and the mica paper layers on both side. The modification process of the modified polyimide film includes using the weakly acidic solution of citrate and dimethyl isophthalate-5-sodium sulfonate for the first immersion modification, then taking it out, drying it and using the graphene oxide solution for the second immersion modified. USE - Mica tape. ADVANTAGE - The mica tape has a low glue content, and the glue has little influence on the wetting performance of the mica paper, and has better vacuum pressure impregnation (VPI) process performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a mica tape, which involves: which involves: electing a polyimide film with a thickness of 0.05-0.08 mm as a raw material, and punch the surface to obtain a polyimide film with dotted holes on the surface middle material, Then spread the polyimide film intermediate material with dot matrix holes into the weakly acidic solution of citrate and dimethyl isophthalate-5-sodium sulfonate for the first soaking modification, taking it out, and after drying, using the graphene oxide solution to carry out the second soaking modification, taking it out, draining it, and air drying it to get a modified polyimide film; paving the mica paper layer, and then apply a layer of adhesive powder to the surface of the mica paper layer by electrostatic spraying on the surface of the mica paper layer; then, coating the sizing material on both sides of the modified polyimide film and penetrate the inhibitor layer, and covering one side on the surface of the above-mentioned mica paper layer; using high-pressure spraying to spray glue sequentially at the positions of the dot matrix holes corresponding to the modified polyimide film on the other side of the modified polyimide film, and controlling the amount of glue sprayed and the position of the glue sprayed, so that the rubber powder can completely cover the corresponding dot matrix holes; and then on the surface of the rubber powder layer on the other side of the modified polyimide film, the reinforced fiber fabric layer with the release film is tiled, and it is fed into the equipment for preheating and then heat-pressed and laminated. The rubber powder layer is melted and formed into a rubber layer, then cooled and solidified, then rolled and cut to obtain the finished mica tape. DESCRIPTION OF DRAWING(S) - The drawing shows a structural diagram of a mica tape. 1Release film 2Reinforcing fiber fabric layer 3Modified polyimide film 4Adhesive layer 5Mica paper layer