Borealis Ag

Anita Luyten

Jingbo Wang

Markus Gahleitner

Klaus Bernreitner

Katja Ellen Klimke

Johanna Lilja

Joachim Fiebig

Henk Van Paridon

Wilhelmus Henricus Adolf Sars

Gustaf Tobieson

Pascal Wust

Onur Uzun

Disclosed herein is a process for recycling propylene-ethylene copolymers to obtain polymers having good optical and mechanical properties, and good processability. The process comprises polymerizing propylene and ethylene under dynamic conditions; collecting the resulting copolymer powders as a mixture having an MFRranging from 1.5 to 80.0 g/10 min and an ethylene content from 1.0 to 4.0 wt. %; compounding the mixture in the presence of a radical initiator and a clarifying agent; and extruding the mixture into pellets. The pellets have an MFRranging from 20 to 120 g/10 min; a ratio of MFR/MFR>1; an ethylene content ranging from 1.0 to 4.0 wt %; a crystallization temperature ranging from 100 to 125° C.; and a flexural modulus of 850 MPa or more. The disclosure also relates to the propylene-ethylene copolymer pellets thus obtained; articles made from the pellets; and the use of the pellets in injection molding applications.

Process for recycling propylene-ethylene copolymers

The present invention is directed to a new polypropylene composition comprising a propylene homopolymer, to a melt-blown fiber comprising the polypropylene composition, to a melt blown web comprising the melt blown fiber and/or the polypropylene composition, to an article comprising the melt blown fiber and/or the melt blown web as well as to the use of the polypropylene composition for improving the relation between pressure drop and hydrohead of a melt-blown web.

Phthalate-free PP homopolymers for meltblown fibers

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Beringen, Belgium

Anita Luyten