Preparation method of cigarette tow containing composite phase change material

The invention belongs to the technical field of polymer composite materials, and relates to a preparation method of a cigarette tow containing a composite phase-change material. The preparation method comprises the following steps: uniformly mixing polypropylene, whitening master batch, vinyl acetate and a copolymer thereof with the composite phase-change material according to a mass ratio of (25-10): (1-3): (1-4): (3-8), and fully drying to obtain a composite material, wherein the crystalline hydrate comprises but is not limited to mirabilite, alum, goslarite and chalcanthite, the cooling particles are polylactic acid particles, glyceryl tristearate, glyceryl monostearate and glyceryl distearate, the composite phase change material is prepared by melting crystalline hydrate and cooling particles at high temperature, stirring and mixing uniformly and then cooling, and melt spinning is performed in a spinning machine; and after stretching, carrying out immersion cleaning, water washing, curling and low-tempera