to blow and extrude high density polyethylene (HDPE), low density polyethylene (LDPE) and linear low density polyethylene (LLDPE) plastic films which are widely used to pack the products for domestic and industrial use such as food, garment, textile, and daily necessities. Pearlized film (pearlized film is bidirectional stretched after the mixture of the raw material polypropylene resin with calcium carbonate and pearly nacreous pigment) and degradable film can be produced after the raw material is formulated.