Patent ID: 11969976
Assignee: DOW QUIMICA DE COLOMBIA S.A.
Field: Surface technology, coating (Chemistry)
Classification: CPC B | IPC B

Claim 13:
14. A multilayer film comprising:
a first layer comprising a linear low density polyethylene having a density from 0.905 g/cm3 to 0.936 g/cm3;
a second layer comprising a polyethylene having a density of greater than 0.940 g/cm3, when measured according to ASTM 742:
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 polyethylene having a density of greater than 0.940 g/cm3, when measured according to ASTM 742, wherein the third layer is positioned between the second layer and the fourth layer; and
a fifth layer comprising a linear low density polyethylene having a density from 0.905 g/cm3 to 0.936 g/cm3, wherein the fourth layer is positioned between the third layer and the fifth layer; and
wherein two or more of the first polyolefin, second polyolefin, third polyolefin, and fourth polyolefin have the same or different; 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.