公开(公告)号：US20240066845A1

公开(公告)日：2024-02-29

申请号：US18267587

申请日：2021-11-26

申请人： SABIC Global Technologies B.V.

发明人： Lanya Cheng ,  Bart Albertus Hubertus van den Esschert ,  Hang Lu ,  Maria Soliman ,  Niclasina Siberta Johanna Alberdina Gerrits

IPC分类号： B32B27/08 ,  B31B70/64 ,  B32B27/32 ,  B65D65/40

CPC分类号： B32B27/08 ,  B31B70/64 ,  B32B27/32 ,  B65D65/40 ,  B31B2155/00 ,  B32B2250/03 ,  B32B2250/242 ,  B32B2307/31 ,  B32B2307/518 ,  B32B2307/54 ,  B32B2307/558 ,  B32B2307/581 ,  B32B2307/5825 ,  B32B2307/72 ,  B32B2307/748 ,  B32B2439/46 ,  B32B2439/70

摘要： The present invention relates to a laminated polyethylene film comprising: (a) a first film; and (b) a second film; wherein the first and the second film are adhering to one another to form a laminate; wherein ⋅ the first film is a bi-directionally oriented film; and ⋅ the second film is a blown film; wherein the first film comprises or consists of polyethylene, and the second film comprises or consists of polyethylene; wherein the second film comprises one or more film layers, and comprises a sealing layer so that the sealing layer forms a surface layer of the laminated film; wherein the sealing layer comprises a polyethylene copolymer (I) comprising moieties derived from 1-octene, having: ⋅ a density of ≥855 kg/m3 and ≤910 kg/m3, as determined in accordance with ASTM D792 (2008); ⋅ 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. Such laminated film, constituting a mono-material, mechanically recyclable packaging film solution, demonstrates a desirably low sealing temperature whilst ensuring good seal strength. This enables use in thermally sealed food packages, with reduced sealing energy consumption and reduced exposing of package contents to high temperatures, leading to increase of shelf life of the packed foodstuff. Moreover, the mechanical properties of the laminate are of desirably high level.