Preparation method of photosensitive dry film protective film

The invention provides a preparation method of a photosensitive dry film protective film. The preparation method comprises the following steps: transferring low-crystal-point LDPE particles to a feeding end located on the outer side of a clean workshop with a thousand-grade clean level; carrying out electrostatic dust removal on the low-crystal-point LDPE particles fed into the feeding hole by using dust removal equipment containing a high-speed ion fan; high-precision co-extrusion film blowing equipment located in a clean workshop with the thousand-grade clean level is used for processing the materials to prepare a film; edge cutting and edge dividing are conducted on the film body; inspecting surface defects of the film body by using a high-speed camera; and applying an adhesive to the tube core to adhere the film body, and rolling the film body. According to the preparation method of the protective film of the photosensitive dry film, the prepared protective film is few in crystal points, few in impurity p