Biaxially oriented high-density polyethylene films with improved sealant skin
AssigneeJFE Innovation Center SRL
InventorsEric T. Gohr, Robert M. Sheppard, Benoît Ambroise
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Abstract
Disclosed are compositions and methods for multilayer films, which, in one embodiment may comprise a core layer comprising at least 50 wt. % of high-density polyethylene. Further, the multilayer film may include a first skin layer comprising an ethylene-propylene polymer, and a second skin layer comprising at least one or more α-olefin copolymers and antiblock. One or more of the at least one or more α-olefin copolymers in the second skin layer, which may be a sealant skin layer, may include at least one ethylene-propylene-butylene polymer in combination with a plastomer and/or elastomer that contain propylene, ethylene, or a combination thereof.
Claims19
A multilayer film comprising:
- a core layer consisting of:
- (i) at least 50 wt. % high-density polyethylene, (ii) linear low-density polyethylene;
- and (iii) hydrocarbon resin optionally in masterbatch solution, wherein (ii) and (iii) are present in a combined amount of 20 wt. % or less;
- a first skin layer consisting of an ethylene-propylene polymer, antiblock in masterbatch solution, and optionally other additives;
- and
- a second skin layer, which is a sealant skin, consisting of:
- (i) ethylene-propylene-butylene polymer, (ii) from about 15 wt. % through about 25 wt. % of one or more:
- α-olefin elastomers, α-olefin block copolymer elastomers, or ethylene α-olefin plastomers, and (iii) antiblock in masterbatch solution, and (iv) optionally other additives, wherein concentration of (i) is in majority in the second skin layer,
- wherein the multilayer film is oriented in at least one direction,
- wherein the multilayer film has an increase in minimum seal temperature as compared to the multilayer film having a second skin layer consisting of (i) and (iii).
Dependencies are inferred from the claim text.