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    BAG FOR CONTAINING BULK GOODS
    2.
    发明公开
    BAG FOR CONTAINING BULK GOODS 审中-公开

    公开(公告)号：US20240075726A1

    公开(公告)日：2024-03-07

    申请号：US17767607

    申请日：2020-09-21

    Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

    Inventor： Bernardus Aldegonda Josephus RAVEN ,  Bart VAN DEN ESSCHERT

    IPC: B32B27/32

    CPC classification number: B32B27/327 ,  B32B2250/03 ,  B32B2307/558 ,  B32B2307/718 ,  B32B2307/7376 ,  B32B2439/06

    Abstract: The present invention relates to a bag for storing bulk goods, wherein the bag comprises a multi-layer film comprising: (a) a first outer layer (c) a core layer; and (e) a second outer layer wherein the layers (a), (c) and (e) are positioned vis-à-vis each other in this order; wherein the multi-layer film comprises: •≥50.0 wt %, preferably ≥50.0 and ≤80.0 wt %, with regard to the total weight of the multi-layer film, of a polymer (A) comprising moieties derived from ethylene and moieties derived from 1-hexene, wherein the polymer (A) has: (i) a density of ≥910 and ≤930 kg/m3 as determined in accordance with ASTM D792 (2008); (ii) a melt mass-flow rate of ≥0.5 and ≤5.0 g/10 min, as determined in accordance with ASTM D1238 (2013) at a temperature of 190° C. under a load of 2.16 kg; (iii) a fraction that is eluted in analytical temperature rising elution fractionation (a-TREF) at a temperature ≤30.0° C. of ≤6.0 wt %, with regard to the total weight of the polymer; and (iv) a fraction eluted in a-TREF at a temperature >94.0° C. of ≥20.0 wt %, with regard to the total weight of the polymer; and •≥20.0 and ≤50.0 wt %, preferably ≥20.0 and ≤40.0 wt %, with regard to the total weight of the multi-layer film, of a polymer (B) comprising moieties derived from ethylene and moieties derived from 1-butene, 1-hexene, or 1-octene, preferably ≥0.5 and ≤5.0 wt % of moieties derived from 1-butene, 1-hexene, or 1-octene, wherein the polymer (B) has: (v) a density of ≥945 and ≤965 kg/m3 as determined in accordance with ASTM D792 (2008); (vi) a melt mass-flow rate of ≥0.01 and ≤1.00, preferably ≥0.01 and ≤0.50, preferably ≥0.01 and ≤0.10 g/10 min, as determined in accordance with ASTM D1238 (2013) at a temperature of 190° C. under a load of 2.16 kg; and 19POLY0091-WO-PCT 19 Classification: General Business Use (vii) a melt mass-flow rate of ≥5.0 and ≤50.0, preferably ≥5.0 and ≤25.0 g/10 min, as determined in accordance with ASTM D1238 (2013) at a temperature of 190° C. under a load of 21.6 kg. [0044] Such bag may be manufactured via blow film extrusion at high speeds and high bubble stability, and such bag has a desirably high dart impact strength.

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