▎ 摘　　要

NOVELTY - Composite antimagnetic mica paper, comprises a mica paper substrate (4), and a functional material layer (2) formed on the surface of the mica paper substrate as a diamagnetic reinforcing layer. The functional material layer and the mica paper substrate are adhered through an adhesive layer (3), and a closed surface layer (1) is formed on the outer surface of the functional material layer. The functional material layer comprises 3-7 wt.% acidified soft magnetic particles, 3-5 wt.% hexagonal boron nitride, 1-3 wt.% graphene, 0.5-1.5 wt.% graphene oxide and resin material (balanced amount). USE - The composite antimagnetic mica paper is useful in wrapping anti-interference cables. ADVANTAGE - The composite antimagnetic mica paper utilizes the structure to carry out anti-magnetic enhancement on the basis of traditional mica paper, while ensuring the insulation performance of the mica paper, has advantages in wrapping anti-interference cables. DETAILED DESCRIPTION - Composite antimagnetic mica paper, comprises a mica paper substrate (4), and a functional material layer (2) formed on the surface of the mica paper substrate as a diamagnetic reinforcing layer. The functional material layer and the mica paper substrate are adhered through an adhesive layer (3), and a closed surface layer (1) is formed on the outer surface of the functional material layer. The functional material layer comprises 3-7 wt.% acidified soft magnetic particles, 3-5 wt.% hexagonal boron nitride, 1-3 wt.% graphene, 0.5-1.5 wt.% graphene oxide and resin material (balanced amount). The acidification treatment of the soft magnetic particles comprises grinding the soft magnetic particles with a Curie temperature of 230-250℃ into a particle size of 200-300 nm, and then adding to 5-8 mol/l sulfuric acid, and maintaing it with Curie temperature of the corresponding to soft magnetic particles upto 10-15℃, and continuously stirring for 30-50 minutes under the assistance of microwaves, taking out and drying to obtain the acidified soft magnetic particles. The resin material comprises 15-20 wt.% polymethyl vinyl siloxane with a viscosity of 30,000-50,000 mPas, 5-10 wt.% polymethyl vinyl siloxane with a viscosity of 100,000-160,000 mPas, and the adhesive layer of the remaining polyurethane resin is cured and molded by silicone resin adhesive. The sealing surface layer is formed with a fluorocarbon resin as a base material, and the sealing surface layer further comprises 5-7 wt.% γ-glycidyl etheroxypropyltrimethoxysilane. An INDEPENDENT CLAIM is also included for preparing the composite diamagnetic mica paper, comprising (1) acidifying the qualified soft magnetic particles to obtain acidified soft magnetic particles, then mixing the acidified soft magnetic particles mixed with hexagonal boron nitride, graphene and graphene oxide, mixing, adding a resin material for ultrasonic-assisted dispersion to obtain a functional material layer; (ii) taking the qualified mica paper purchased or homemade as the mica paper substrate, sanding the surface of one side of the mica paper substrate to obtain a rough surface, coating epoxy resin material on the rough surface to obtain an adhesive layer, thinly coating the functional material layer on the surface of the adhesive layer to obtain an intermediate profile paper; (iii) forming the closed surface layer separately according to the mass ratio to obtain the film layer; (iv) attaching the film layer to the surface of the intermediate profile paper, forming using composite hot pressing and then trimming the edges, and curing to obtain the finished composite antimagnetic mica paper. DESCRIPTION OF DRAWING(S) - The drawing shows a structural diagram of a composite antimagnetic mica paper. 1Closed surface layer 2Functional material layer 3Adhesive layer 4Mica paper substrate