| 摘要 |
AN EXTRUDED AIR COOLED BLOWN FILM HAVING A) A TOTAL THICKNESS OF 5 TO 500 µM, B) A MONO-LAYER STRUCTURE OR 2 TO 9 COEXTRUDED LAYERS, C) AT LEAST ONE LAYER L CONTAINING A POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYPROPYLENE HOMOPOLYMERS, POLYPROPYLENE RANDOM COPOLYMERS, HETERO-PHASIC POLYPROPYLENE BLOCK COPOLYMERS, OR ANY MIXTURES THEREOF, SAID POLYMER HAVING A MELT FLOW RATE, ACCORDING TO ASTM D-1238, OF 0.1 TO 10 DG/MIN AT 230°C AND 2.16 KG, SAID LAYER L FURTHER CONTAINING 0.001 TO 2%, RELATIVE TO THE WEIGHT OF THE POLYMER, OF A PARTICULAR NUCLEATING AGENT, AND OPTIONALLY D) A MODULUS ACCORDING TO EN ISO 527 ENHANCED BY AT LEAST 10% VERSUS A REFERENCE FILM WITHOUT THE NUCLEATING AGENT. |
