	US 12,145,344 B2
	Oriented polyethylene films and articles comprising the same
Karlheinz Hausmann, Auvernier (CH); Justice Alaboson, Rosharon, TX (US); Jian Wang, Missouri City, TX (US); Brayden E. Glad, Manvel, TX (US); Ronald Wevers, Terneuzen (NL); Sanjib Biswas, Manvel, TX (US); Andrew T. Heitsch, Angleton, TX (US); Mridula Kapur, Lake Jackson, TX (US); Didem Oner-Deliormanli, Bellaire, TX (US); Joshua B. Gaubert, Pearland, TX (US); Alexander Williamson, Rosharon, TX (US); and Mehmet Demirors, Pearland, TX (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/754,753
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Nov. 11, 2020, PCT No. PCT/US2020/059925 § 371(c)(1), (2) Date Apr. 11, 2022, PCT Pub. No. WO2021/126419, PCT Pub. Date Jun. 24, 2021.
Claims priority of provisional application 62/945,973, filed on Dec. 10, 2019.
Prior Publication US 2024/0316906 A1, Sep. 26, 2024
Int. Cl. B32B 27/08 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B32B 27/34 (2006.01)

CPC B32B 27/08 (2013.01) [B32B 27/306 (2013.01); B32B 27/32 (2013.01); B32B 27/34 (2013.01); B32B 2250/24 (2013.01); B32B 2255/10 (2013.01); B32B 2255/205 (2013.01); B32B 2307/518 (2013.01); B32B 2307/72 (2013.01); B32B 2307/7376 (2023.05)]

20 Claims

1. A biaxially oriented, multilayer polyethylene film comprising:

at least one layer comprising:

(1) a polyethylene-based composition that comprises:

(a) at least 97% by weight, based on the total weight of the polyethylene-based composition, of a polyethylene composition comprising:

(i) from 25 to 37 percent by weight of a first polyethylene fraction having a density in the range of 0.935 to 0.947 g/cm³and a melt index (I₂) of less than 0.1 g/10 minutes; and

(ii) from 63 to 75 percent by weight of a second polyethylene fraction; and

(b) 20 to 5000 ppm, based on the total weight of the polyethylene-based composition of a nucleating agent, wherein the nucleating agent comprises a calcium salt of 1,2-cyclohexanedicarboxylic acid or sodium 4-[(4-chlorobenzoyl) amino] benzoate; wherein the polyethylene composition has less than 0.10 branches per 1,000 carbon atoms when measured using ¹³C NMR, wherein the density of the polyethylene-based composition is at least 0.965 g/cm³, and wherein the melt index (I₂) of the polyethylene-based composition is 0.5 to 10 g/10 minutes.