... from PP and mid-layer from LLDPE) plastic film, coextruded by three extruders, shaped in a die, processed thro two ... to process heat-shrinkable film in two blowing steps, developed by Guanghua Machinery itself with assimilation of leading technology from overseas ... a helical die head, heated through a tube oven with ceramic plates, temperature and tension auto controlled, swiveling hauled-off down. ...