... certificate 4)economical, small in size SJ-D50, 55 Mini Film Blowing MachineUSEIts extruder, cylinder and screw rods are made ... plasticizing, which helps increase the production capacity. It is applied to blowing the plastic films like low density polyethylene (LDPE), ... linear low density polyethylene (LLDPE). It is widely applied to producing the packing bags for foodstuff, clothing, rubbish bag and ...