Borealis Technology Oy

Norner as

Irene Helland

Markku Vahteri

Roger Carlsson

Merete Skar

Thomas Garoff

Bert Broeders

Arild Follestad

Siw Bodil Fredriksen

Virginie Eriksson

Henk Van Paridon

Ole Jan Myhre

Tore Dreng

Jorunn Nilsen

Remko Van Marion

Hans Eklind

Petri Rekonen

Jari Äärilä

Katrin Nord-Varhaug

Svein Stall Eggen

Marja Ora

Hans Georg Daviknes

Jari Hatonen

Marit Seim

Marjo Väänänen

Jani Äärilä

Lars Inge Kvamme

Hans-Jorg Fell

Jari HÄTÖNEN

Peter Voortmans

Håkon Tvermyr

Arja Lehtinen

A multimodal linear low density polyethylene polymer having a final density of 900 to 940 kg/m, and containing at least one &#x3b1;-olefin comonomer in addition to ethylene comprising: (A) 30 to 60 wt % of a lower molecular weight component being an ethylene homopolymer or a copolymer of ethylene and at least one &#x3b1;-olefin; and (B) 70 to 40 wt % of a higher molecular weight component being a copolymer of ethylene and at least one &#x3b1;-olefin, said &#x3b1;-olefin being the same or different from any &#x3b1;-olefin used in component (A) but with the proviso that both components (A) and (B) are not polymers of ethylene and butane alone; wherein the multimodal LLDPE has a dart drop of at least 700 g; and wherein components (A) and (B) are obtainable using a Ziegler-Natta catalyst.

Multi-stage process for producing multimodal linear low density polyethylene polymers

A multimodal medium density polyethylene polymer obtainable using single site catalysis which comprises at least:

Multimodal medium density polyethylene polymer composition

The present invention relates to a film comprising at least one layer comprising an ethylene homo- or copolymer which has a complex viscosity at 5 kPa shear stress eta5 of 200,000 or less and a shear thinning index SHI(5/300) measured at 190&#xb0; C. as the ratio between the complex viscosity at 5 kPa shear stress and the complex viscosity at 300 kPa shear stress of 120 or more.

Polyethylene film with improved processability and mechanical properties

The present invention relates to a polyethylene composition, comprising a base resin which comprises (i) a first fraction which is an ethylene homo- or copolymer, and (ii) a second fraction which is an ethylene copolymer, wherein the first fraction (i) has a lower weight average molecular weight than the second fraction (ii), and the base resin has a density of less than 0.940 g/cm3 and a shear thinning index SHIof at least 25.

Outer sheath layer for power or communication cable

The invention relates to a polymer blend suitable for the production of film, said polymer blend comprising at least (1) a multimodal high density polyethylene (HDPE) composition and (2) a low density polyethylene (LDPE) polymer, a linear low density polyethylene (LLDPE) polymer or a mixture of LDPE and LLDPE polymers, said HDPE composition comprising a multimodal HDPE polymer which contains at least a lower molecular weight (LMW) polyethylene component and a higher molecular weight (HMW) polyethylene component.

Polymer blend

A power or communications cable having an outer sheath layer made of a polyethylene composition including a base resin which comprises (A) a first ethylene homo- or copolymer fraction, and (B) a second ethylene homo- or copolymer fraction, wherein fraction (A) has a lower molecular weight than fraction (B), and the base resin has a molecular weight distribution M/Mof more than 14.

A process for producing bimodal linear low-density polyethylene polymer compositions, useful for making films. The polymer compositions have a melt flow rate MFRof 0.4 to 1.0 g/10 min and a density of 918 to 925 kn/m. The process to produce the polymer compositions involves copolymerizing ethylene with an alpha-olefin comonomer in a loop reactor to produce a low molecular weight polymer having a melt flow rate MFRof 50 to 500 g/10 min and a density of 945 to 953 kg/m. The polymerization is continued in a gas phase reactor to produce a high molecular weight polymer, such that the final polymer composition has the desired properties. The final composition contains from 41 to 48% by weight of the low molecular weight polymer and from 59 to 52% by weight of the high molecular weight polymer. The resulting films have an excellent visual appearance and good mechanical properties. The compositions can easily be converted to films. The process can be operated a long time without a shutdown.

Process for the production of linear low-density polyethylene composition

A film of a polyethylene produced by polymerization catalysed by a single site catalyst and comprising as comonomers to ethylene at least two Calpha olefins, preferably but-1-ene and hex-1-ene.

Polymer film

Growing community of inventors

Porsgrunn, Norway

Irene Helland