... +A Automatical Dual Purpose ldpe hdp blown film machines/lines, Multi-layer blown plant with screw L/D of 28/1, ... )0.015-0.06MAX OUTPUT100kg/hrEXTRUDER UNIT SCREW DIAMETERA45B55SCREWL/D RATIOL/D 28/1SCREW MATERIAL38CrMoALASCREW ROTATION SPEED25-150r/minHEATING CAPACITY23kwDRIVING MOTOR50P( ... +A Automatical Dual Purpose ldpe hdp blown film machines/lines, Multi-layer blown plant with screw L/D of 28/1, ...