The present invention belongs to the field of
polypropylene film or
mass materials, especially relates to the rolling-angle controllable, super-hydrophobic,
polypropylene film or
mass and its preparation method. Solving
polypropylene in
solvent, and passing through processes of shearing, heat treatment, cooling, phase separation /
crystallization, solidification, shaping, and
drying at last, the films or masses with different morphological
crystal networks are formed. With the minimum rolling ability on film or
mass surface, water drops will roll, while the
rolling angle is between 0 degree and 1 degree, and with the maximum rolling ability, the drops will not roll, while the
rolling angle is 90 degree or 180 degree. The
contact angle between film or mass surface and water is larger than 150 degree. The present invention achieves the control of super-hydrophobic property and
rolling angle of general
polyolefin resin film, without any later modification by low-surface-
energy materials (containing
fluoride materials or
silane, etc.), and has good surface-structure stability, wind and rain resistance, and
chemical corrosion resistance.