The invention discloses a multi-release type alumite, and relates to the technical field of alumite preparation, and the multi-release type alumite is prepared by the following steps: preparing a release
coating material liquid, and
coating and baking to obtain the multi-release type alumite; the preparation of the release
coating material liquid comprises the following steps: mixing a modified waterborne
polyurethane-
acrylate composite
emulsion, a
molybdenum disulfide-cage
phase change microcapsule
hybrid nanofiller, a coalescing agent, a
wetting leveling agent and an organic
silicon defoaming agent in a stirring state, adjusting the
viscosity, and then standing for defoaming; the preparation of the release coating material liquid comprises the following steps: mixing the modified waterborne
polyurethane-
acrylate composite
emulsion, the
molybdenum disulfide-cage
phase change microcapsule
hybrid nanofiller, the coalescing agent, the
wetting leveling agent and the organic
silicon defoaming agent in a stirring state; the step of coating and baking comprises the sub-steps of uniformly coating a PET base film subjected to
corona treatment with a release coating material liquid by adopting a micro gravure coating technology, carrying out gradient heating pre-baking by virtue of a three-section
infrared tunnel oven, and finally baking in a high-temperature baking area. Through chemical
integrated design, low release force and high
hardness of the coating are coordinated, clean and sharp transfer of fine patterns is achieved, a
process window is widened by means of a photo-thermal
sensitization mechanism, and adaptability and yield of products under complex working conditions are improved.