| 摘要 |
THE INSTANT INVENTION IS A POLYETHYLENE FILM, AND METHOD OF MAKING THE SAME. THE POLYETHYLENE FILM ACCORDING TO INSTANT INVENTION INCLUDES AT LEAST ONE HETEROGENEOUSLY BRANCHED ETHYLENE/ -OLEFIN COPOLYMER HAVING A DENSITY IN THE RANGE OF ABOUT 0.910 TO ABOUT 0.930 G/CM�, A MOLECULAR WEIGHT DISTRIBUTION IN THE RANGE OF ABOUT 2.8 TO 3.8? A MELT INDEX (I?) IN THE RANGE OF ABOUT 0.3 TO ABOUT 4 G/10 MIN, AND AN I??/I? RATIO IN THE RANGE OF 6.5 TO ABOUT 7.8. THE FILM HAS A NORMALIZED DART IMPACT STRENGTH OF EQUAL OR GREATER THAN (6666-7012* DENSITY) G/MIL, A NORMALIZED TEAR STRENGTH OF EQUAL OR GREATER THAN (440*e-(DENSITY-0.915)� / 2*(0.00949)�) G/MIL, AND A HAZE IN THE RANGE OF 3 TO 10 PERCENT. THE METHOD OF MAKING THE POLYETHYLENE FILM ACCORDING TO INSTANT INVENTION INCLUDES THE FOLLOWING STEPS: (1) PROVIDING AT LEAST ONE HETEROGENEOUSLY BRANCHED ETHYLENE/ -OLEFIN COPOLYMER HAVING A DENSITY IN THE RANGE OF ABOUT 0.910 TO ABOUT 0.930 G/CM�, A MOLECULAR WEIGHT DISTRIBUTION IN THE RANGE OF ABOUT 2.8 TO 3.8? A MELT INDEX (I?) IN THE RANGE OF ABOUT 0.3 TO ABOUT 4 G/10 MIN, AND AN I??/ I? RATIO IN THE RANGE OF 6.5 TO ABOUT 7.8; (2) PROCESSING THE HETEROGENEOUSLY BRANCHED ETHYLENE/ -OLEFIN COPOLYMER VIA BLOWN FILM EXTRUSION PROCESS OR CAST FILM EXTRUSION PROCESS; AND (3) THEREBY FORMING A FILM HAVING A NORMALIZED DART IMPACT STRENGTH OF EQUAL OR GREATER THAN (6666-7012* DENSITY) G/MIL, A NORMALIZED TEAR STRENGTH OF EQUAL OR GREATER THAN (440*e -(DENSITY-0.915)� / 2*(0.00949)� ) G/MIL, AND A HAZE IN THE RANGE OF 3 TO 10 PERCENT. |
