US 12,104,026 B2
Package comprising a bi-directionally oriented polyethylene film
Niclasina Siberta Johanna Alberdina Gerrits, Sittard (NL); and Attilio Scala, Maastricht (NL)
Assigned to SABIC GLOBAL TECHNOLOGIES B.V., Bergen Op Zoom (NL)
Appl. No. 17/639,073
Filed by SABIC GLOBAL TECHNOLOGIES B.V., Bergen op Zoom (NL)
PCT Filed Aug. 28, 2020, PCT No. PCT/EP2020/074067
§ 371(c)(1), (2) Date Feb. 28, 2022,
PCT Pub. No. WO2021/043678, PCT Pub. Date Mar. 11, 2021.
Claims priority of application No. 19195069 (EP), filed on Sep. 3, 2019.
Prior Publication US 2022/0298317 A1, Sep. 22, 2022
Int. Cl. C08J 5/18 (2006.01); B32B 27/08 (2006.01); B32B 27/32 (2006.01)
CPC C08J 5/18 (2013.01) [B32B 27/08 (2013.01); B32B 27/32 (2013.01); B32B 2307/518 (2013.01); B32B 2439/70 (2013.01); C08J 2323/06 (2013.01)] 13 Claims
 
1. A package comprising a bi-directionally oriented polyethylene film, wherein the bi-directionally oriented film comprises a polymer having moieties derived from ethylene and moieties derived from 1-hexene, wherein the polymer has:
(a) a density of ≥910 and ≤930 kg/m3 as determined in accordance with ASTM D792 (2008);
(b) a melt mass-flow rate of ≥0.2 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;
(c) a fraction that is eluted in analytical temperature rising elution fractionation (a-TREF) at a temperature ≤30.0° C.of ≥8.0 wt % with regard to the total weight of the polymer; and
(d) 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
(e) optionally a fraction eluted in a-TREF at a temperature >30.0° C. and ≤94.0° C. of ≥40.0 and ≤64.0 wt %, with regard to the total weight of the polymer;
wherein the package is a bag or pouch containing at least one seal obtained by thermal sealing of two layers of the polyethylene film, and
wherein the polymer comprises <250 unsaturations per 1000000 chain carbon atoms, wherein the unsaturations are determined as the sum of the vinyl unsaturations, vinylene unsaturations, vinylidene unsaturations, and triakyl unsaturations, determined via 1H NMR.