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US 12,606,696 B2Granted
Polyethylene compositions suitable for use in cast stretch films
AssigneeDow Global Technologies LLC
InventorsAkanksha Garg, Jon W. Hobson, Jose E. Ruiz, Rajen M. Patel, Jeffrey A. Sims, Frederik Ter Borg, Tyler Culp
Life of this patent
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Abstract
Provided are polyethylene compositions and cast stretch films comprising polyethylene compositions. The cast stretch films can exhibit improved tear strength and on pallet benefits while maintaining other properties. The cast stretch films can also be fully compatible with polyethylene recycling streams and can be free of polypropylene.
Claims10
A polyethylene composition characterized by having the following:
- (a) a density of from 0.910 to 0.945 g/cm3;
- (b) a melt index (I2) of from 0.5 to 7.0 g/10 min;
- (c) a first polyethylene fraction having a single peak in a temperature range of from 40° C. to 85° C. in an elution profile via improved comonomer composition distribution (iCCD) analysis method;
- (d) a second polyethylene fraction having a single peak in a temperature range of from 90° C. to 115° C. in the elution profile via iCCD analysis method, and wherein a second polyethylene area fraction is an area in the elution profile beneath the peak of the second polyethylene fraction between 90° C. and 115° C., and wherein the second polyethylene area fraction comprises at least 30% of the total area of the elution profile, and wherein the width of the peak of the second polyethylene fraction at 50 percent peak height is less than 4.0° C.;
- and
- (e) a molecular weighted comonomer distribution index (MWCDI) value of less than 0.
3 more elements
A cast stretch film comprising a polyethylene composition characterized by having the following:
- (a) a density of from 0.910 to 0.945 g/cm3;
- (b) a melt index (I2) of from 0.5 to 7 g/10 min;
- (c) a first polyethylene fraction having a single peak in a temperature range of from 40° C. to 85° C. in an elution profile via improved comonomer composition distribution (iCCD) analysis method;
- (d) a second polyethylene fraction having at least one peak in a temperature range of from 90° C. to 115° C. in the elution profile via iCCD analysis method, and wherein a second polyethylene area fraction is an area in the elution profile beneath the peak of the second polyethylene fraction between 90° C. and 115° C., and wherein the second polyethylene area fraction comprises at least 30% of the total area of the elution profile;
- and
- (e) a MWCDI value of less than 0.
3 more elements
Dependencies are inferred from the claim text.