The invention provides a high-temperature-resistant
masking tape and a preparation method thereof, and relates to the technical field of
high polymer material
engineering. The preparation method of the high-temperature-resistant
masking tape comprises the following steps: S1, based on
polyimide resin, forming a base material film by adopting an
extrusion casting process, and generating an initial
polyimide base material film through high-temperature imidization treatment; s2, performing low-temperature
plasma activation treatment on the surface of one side of the substrate film to generate a surface activated
polyimide substrate film; and S3,
coating the activated surface with a
silane coupling agent primer, and carrying out
drying treatment to generate the interface modified
polyimide substrate film. A stable
film structure is formed through high-temperature imidization treatment of a polyimide base material, the
heat resistance and
mechanical strength of the base material are remarkably improved, the surface of the base material is activated by adopting low-temperature
plasma, polar groups are introduced, and the interface chemical bonding force is enhanced by combining the directional bonding effect of a
silane coupling agent primer, so that interlayer debonding in a high-temperature environment is avoided, and the
heat resistance and
mechanical strength of the base material are improved. And preparing the
silicone rubber buffer layer.