Ineos Manufacturing Belgium Nv

Ineos Europe Ag

Luc Marie Ghislain Dheur

Choon Kooi Chai

Benoit Koch

Yves-Julien Lambert

Andre Frederich

Isabelle Cermelli

Stefan Spitzmesser

Fabian Siberdt

John Amos

Stefan Klaus Spitzmesser

A polyethylene composition is disclosed which comprises from 45 to 55 wt % of an ethylene polymer (A) having a density of at least 968 kg/m, and from 55 to 45 wt % of an ethylene polymer (B) having a density of 920 to 955 kg/m, wherein the composition has a density of 952 to 961 kg/m, a high load melt index HLMI of 18-28 g/10 min, a ratio of HLMI/ML of 80-150, and a melt elastic modulus G' (G&#x2033;=3000) of 1200-1600 Pa, where HLMI and MLare measured according to ISO1133 at a temperature of 190&#xb0; C. under loads of 21.6 kg and 2.16 kg respectively.

Polymer composition for blow moulding

Copolymers of ethylene and &#x3b1;-olefins having (a) a density (D) in the range 0.900-0.940 g/cm, (b) a melt index MI(2.16 kg, 190&#xb0; C.) in the range of 0.01-50 g/10 min, (c) a melt index MI(2.16 kg, 190&#xb0; C.) and Dow Rheology Index (DRI) satisfying the equation [DRI/MI]&#x3e;2.65, and (d) a Dart Drop Impact (DDI) in g of a blown film having a thickness of 25 &#x3bc;m produced from the copolymer satisfying the equation DDI&#x2267;1900&#xd7;{1&#x2212;Exp [&#x2212;750(D&#x2212;0.908)]}&#xd7;{Exp [(0.919&#x2212;D)/0.0045]}. The copolymers may be prepared using metallocene catalysis and are preferably prepared in multistage processes carried out in loop reactors in the slurry phase. The copolymers exhibit long chain branching as defined by Dow Rheology Index (DRI) and exhibit unexpected improvements in mechanical properties, in particular dart drop impact, when extruded into blown films.

Polymers

Film formed from a polyethylene resin composition which obeys a dynamic rheological relationship at 190&#xb0; C. between melt storage modulus G', measured in Pa and at a dynamic frequency where the loss modulus G&#x2033;=3000 Pa, and dynamic complex viscosity &#x3b7;*, measured in Pa&#xb7;s at 100 rad/s, such that (a) G&#x2032;(G&#x2033;=3000)&#x3e;&#x2212;0.86&#x3b7;*+z where z=3800, and at the same time (b) G&#x2032;(G&#x2033;=3000)&#x3e;0.875&#x3b7;*&#x2212;y where y=650, and having an impact strength (DDT) of at least 250 g, measured on 15 &#x3bc;m thick film (blown under conditions with BUR=5:1 and Neck Height=8&#xd7;D) conditioned for 48 hours at 20&#xb0;-25&#xb0; C., according to ASTM D1709.

Bimodal polyethylene film

Drawn tape, fiber or filament including a multimodal resin having a density of at least 940 kg/m, a melt index MIof 0.05 to 5 g/10 min, and a molecular weight distribution of the resin being less than 40.

Drawn tapes, fibre and filaments comprising a multimodal polyethylene resin

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Brussels, Belgium

Luc Marie Ghislain Dheur