US 11,969,976 B2
Multilayer films that include at least five layers and methods of producing the same
Jorge Mario Rodriguez Camelo, Bogota (CO); Marlos Guintini de Oliveira, Sao Paulo (BR); Nicolas Cardoso Mazzola, Sao Paulo (BR); Sanjib Biswas, Lake Jackson, TX (US); Joshua B. Gaubert, Lake Jackson, TX (US); Douglas S. Ginger, Lake Jackson, TX (US); Mridula Kapur, Lake Jackson, TX (US); Didem Oner-Deliormanli, Freeport, TX (US); and Mehmet Demirors, Pearland, TX (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US); and Dow Quimica De Colombia S.A., Bogota (CO)
Appl. No. 17/632,468
Filed by Dow Global Technologies LLC, Midland, MI (US); and Dow Quimica de Colombia S.A., Bogota (CO)
PCT Filed Aug. 4, 2020, PCT No. PCT/US2020/044862
§ 371(c)(1), (2) Date Feb. 2, 2022,
PCT Pub. No. WO2021/026139, PCT Pub. Date Feb. 11, 2021.
Claims priority of provisional application 62/883,475, filed on Aug. 6, 2019.
Claims priority of provisional application 62/883,467, filed on Aug. 6, 2019.
Prior Publication US 2022/0288899 A1, Sep. 15, 2022
Int. Cl. B32B 27/08 (2006.01); B32B 27/32 (2006.01)
CPC B32B 27/08 (2013.01) [B32B 27/32 (2013.01); B32B 2250/05 (2013.01); B32B 2250/242 (2013.01); B32B 2307/558 (2013.01); B32B 2307/5825 (2013.01); B32B 2307/72 (2013.01); B32B 2307/732 (2013.01); B32B 2439/46 (2013.01)] 15 Claims
 
1. A multilayer film comprising:
a first layer comprising a first polyolefin;
a second layer comprising a second polyolefin;
a third layer comprising a third polyolefin, wherein the second layer is positioned between the first layer and the third layer;
a fourth layer comprising a fourth polyolefin, wherein the third layer is positioned between the second layer and the fourth layer; and
a fifth layer comprising a fifth polyolefin, wherein the fourth layer is positioned between the third layer and the fifth layer;
wherein two or more of the first polyolefin, the second polyolefin, the third polyolefin, the fourth polyolefin, and the fifth polyolefin are the same or different in composition; and
wherein the third polyolefin is 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, 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.