POLYMER COMPOSITION HAVING IMPROVED IMPACT STRENGTH AT LOW TEMPERATURES

    公开(公告)号:US20230146490A1

    公开(公告)日:2023-05-11

    申请号:US17914831

    申请日:2021-03-29

    Abstract: A polymer composition includes: (a) a propylene-based polymer having a melt mass-flow rate of ≥5.0 and ≤90.0 g/10 min; and (b) ≥5.0 and ≤30.0 wt %, with regard to the total weight of the polymer composition, of an ethylene-based polymer having: a melt mass-flow rate of 3.0 and ≤30.0 g/10 min; a density of ≥840 and ≤870 kg/m3; and a content of ≥25.0 and ≤50.0 wt % of moieties derived from 1-octene, with regard to the total weight of the ethylene-based polymer. Such polymer composition demonstrates improved low temperature impact strength, determined as Izod impact strength at −40° C. and/or at −30° C., as well as desirable toughness, determined as tensile modulus, whilst having good flowability in injection moulding and thereby allowing complex, thin-walled objects to be shaped.

    POLYETHYLENE FILM FOR HEAT SEALING
    3.
    发明公开

    公开(公告)号:US20240067786A1

    公开(公告)日:2024-02-29

    申请号:US18269812

    申请日:2021-11-30

    Inventor: Li YUAN Priya GARG

    Abstract: The present invention relates to a film comprising at least one sealing layer wherein at least one layer A of the sealing layer(s) comprises a polyethylene comprising moieties derived from ethylene and moieties derived from an α-olefin comprising 4 to 10 carbon atoms, the polyethylene having a density of ≥870 and ≤920 kg/m3 as determined in accordance with ASTM D792 (2013), wherein the polyethylene has: a fraction of material that is eluted in analytical temperature rising elution fractionation (a-TREF) at a temperature ≤30.0° C. of ≤14.0 wt %, preferably ≥5.0 wt % and ≤14.0 wt %, more preferably ≥5.0 wt % and ≤12.5 wt %, with regard to the total weight of the polyethylene; a shear storage modulus G′ determined at a shear loss modulus G″=5000 Pa of

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