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US 12,440,823 B2Granted
Polymer-based film with balanced properties
AssigneeDow Global Technologies LLC
InventorsAndrew T. Heitsch, Yijian Lin, Barbara Bonavoglia, Kyle E. Hart, Mehmet Demirors, Rou Hua Chou, Manoj Thota
Life of this patent
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Abstract
A film includes 20.0 weight percent to 69.5 weight percent of a linear low density polyethylene (LLDPE) based polymer. The LLDPE having a high density fraction (HDF) from 3.0% to 8.0%, an I10/I2 ratio from 5.5 to 6.9, and a short chain branching distribution (SCBD) of less than or equal to 8.0° C. The film also includes 0.0 weight percent to 10.0 weight percent low density polyethylene (LDPE) based polymer, and 30.0 weight percent to 70.0 weight percent pore former.
Claims18
A film comprising:
- 20.0 weight percent to 69.5 weight percent linear low density polyethylene (LLDPE) based polymer, wherein the LLDPE based polymer comprises
- a high density fraction (HDF) from 3.0% to 8.0%, wherein the high density fraction is measured by crystallization elution fractionation (CEF) integration at temperatures from 93° C. to 119° C.,
- an I10/I2 ratio from 5.5 to 6.9, wherein I2 is the melt index when measured according to ASTM D 1238 at a load of 2.16 kg and temperature of 190° C. and I10 is the melt index when measured according to ASTM D 1238 at a load of 10 kg and temperature of 190° C., and
- a short chain branching distribution (SCBD) of less than or equal to 7.0° C., wherein the short chain branching distribution is measured by CEF full width at half height;
- 0.0 weight percent to 10.0 weight percent low density polyethylene (LDPE) based polymer;
- and
- 30.0 weight percent to 70.0 weight percent pore former.
4 more elements
Dependencies are inferred from the claim text.