Unimodal polyethylene copolymer and film thereof
AssigneeUnivation Technologies, LLC
InventorsBo Liu, Yi Zhang, Ayush A. Bafna, François Alexandre, Kevin R. Gross
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Abstract
A unimodal ethylene-co-1-butene copolymer that, when in melted form at 190 degrees Celsius, is characterized by a unique melt property space defined by combination of shear thinning and melt elasticity properties. A blown film consisting essentially of the unimodal ethylene-co-1-butene copolymer. A method of synthesizing the unimodal ethylene-co-1-butene copolymer. A method of making the blown film. A manufactured article comprising the unimodal ethylene-co-1-butene copolymer.
Claims10
A unimodal ethylene-co-1-butene copolymer that, when in melted form at 190° C., is characterized by a melt property space defined by a combination of shear thinning and melt elasticity properties, wherein the shear thinning property is defined according to equation 1 (Eq. 1):
- G′ (G″=3,000 Pa)<66.6*MFR5+630 (Eq. 1);
- and the melt elasticity property is defined according to equation 2 (Eq. 2):
- G′ (G″=3,000 Pa)<23.5*SH1000+1182 (Eq. 2);
- wherein < is less than;
- * is multiplication;
- / is division;
- = is equals;
- G′ (G″=3,000 Pa) is melt elasticity in Pascals (Pa) measured according to Melt Storage Modulus Test Method at loss modulus G″=3000 pascals;
- MFR5 is melt flow ratio I21/I5;
- I21 is high-load melt index (HLMI) in grams per 10 minutes (g/10 min) measured according to ASTM D1238-13 (190° C., 21.6 kg);
- I5 is melt index in g/10 min measured according to ASTM D1238-13 (190° C., 5.0 kg);
- SH1000=Eta0.126/Eta126;
- Eta0.126 is complex viscosity in Pascal-seconds (Pa-s) measured at 0.126 radian per second (rad/s) by Dynamic Mechanical Analysis Test Method;
- and Eta126 is complex viscosity Pa-s measured at 126 rad/s by the Dynamic Mechanical Analysis Test Method.
Dependencies are inferred from the claim text.