Bp Chemicals Limited

Ineos Europe Limited

Frederic Alarcon

Christopher James Frye

Brian Leslie Turtle

David George Gilbert

Novel stretch and blown films are prepared based on copolymers of ethylene and alpha-olefins having (a) a density in the range 0.900 to 0.940 (b) an apparent Mw/Mn of 2&#x2013;3.4 (c) I/Ifrom 16 to 24 (d) activation energy of flow from 28 to 45 kJ/mol (e) a ratio Ea(HMW)/Ea(LMW)&#x3e;1.1, and (f) a ratio g'(HMW)/g&#x2032;(LMW) from 0.85 to 0.95. The films exhibit an excellent combination of strength and processability and are particularly suitable for use as either stretch films or blown films for use as heavy duty sacks. The preferred films show a dart impact of &#x3e;1100 g and MD elongations of &#x3e;500%.

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Allee des Argelas, France

Frederic Alarcon