US 12,187,016 B2
Multilayer films having at least three layers and methods of producing the same
Justice Alaboson, Freeport, TX (US); Sanjib Biswas, Lake Jackson, TX (US); Joshua B. Gaubert, Lake Jackson, TX (US); Douglas S. Ginger, Lake Jackson, TX (US); Vivek Kalihari, Freeport, TX (US); Mridula Kapur, Lake Jackson, TX (US); Lori L. Kardos, Freeport, TX (US); Nicolas Cardoso Mazzola, Sao Paulo (BR); Francis O. Olajide, Jr., Freeport, TX (US); Didem Oner-Deliormanli, Freeport, TX (US); and Jose Eduardo Ruiz, Freeport, TX (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/632,604
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Aug. 4, 2020, PCT No. PCT/US2020/044856
§ 371(c)(1), (2) Date Feb. 3, 2022,
PCT Pub. No. WO2021/026134, PCT Pub. Date Feb. 11, 2021.
Claims priority of provisional application 62/883,469, filed on Aug. 6, 2019.
Claims priority of provisional application 62/883,467, filed on Aug. 6, 2019.
Prior Publication US 2022/0288906 A1, Sep. 15, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 27/32 (2006.01); B32B 27/08 (2006.01); C08L 23/06 (2006.01)
CPC B32B 27/32 (2013.01) [B32B 27/08 (2013.01); C08L 23/06 (2013.01); B32B 2250/03 (2013.01); B32B 2307/72 (2013.01); B32B 2307/732 (2013.01); C08L 2203/16 (2013.01); C08L 2207/066 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A multilayer film comprising:
a first layer comprising:
a polyethylene composition comprising:
(a) a first polyethylene fraction having a single peak in a temperature range of 45° C. to 87° C. in an elution profile via improved comonomer composition distribution (iCCD) analysis method, wherein a first polyethylene fraction area is an area in the elution profile beneath the single peak of the first polyethylene fraction between 45° C. and 87° C.; and
(b) a second polyethylene fraction having a single peak in a temperature range of 95° C. to 120° C. in the elution profile via iCCD analysis method and wherein a second polyethylene fraction area is an area in the elution profile beneath the single peak of the second polyethylene fraction between 95° C and 120° C.;
wherein the polyethylene composition has a density of 0.924 g/cm3 to 0.936 g/cm3 and a melt index (I2) of 0.25 g/10 minutes to 2.0 g/10 minutes at a load of 2.16 kg and a temperature of 190° C., wherein the first polyethylene fraction area comprises at least 40% of the total area of the elution profile, wherein a ratio of the first polyethylene fraction area to the second polyethylene fraction area is 0.75 to 2.5, and wherein the width of the single peak of the second polyethylene fraction at 50 percent peak height is less than 5.0° C.;
a second layer comprising a first polyolefin; and
a third layer comprising a second polyolefin;
wherein the first layer is positioned between the second layer and the third layer; and
wherein the first polyolefin and the second polyolefin are the same or different.