Abstract: Provided herein are polyethylene compositions having a combination of properties including: density from about 0.930 to 0.975 g/cm3; broad molecular weight distributions (Mw/Mn?10 and/or Mz/Mn?80) and a highly branched architecture (e.g., g?LCB less than or equal to 0.85, preferably less than or equal to 0.75). The polyethylene compositions may further have a low molecular weight fraction (LMWF) and a high molecular weight fraction (HMWF), such that the wt % of LMWF in the compositions is greater than the wt % of HMWF. The polyethylene compositions may be suitable for making films, particularly oriented films such as uni axially (machine-direction-oriented) or biaxially-oriented films, and in particular all-PE films.

Abstract: Provided herein are polyethylene compositions with unimodal molecular weight distribution exhibiting an excellent balance of physical properties. The polyethylene compositions may have density of 0.935 to 0.975 g/cm3 and Melt Index (I2.16) of 0.1 to 1 g/10 min. Polyethylene compositions of certain embodiments may exhibit environmental stress crack resistance (ESCR, 10% Igepal, ASTM D1693 Cond. B) within the range from 45 to 80 hours, and/or (ESCR, 100% igepal, ASTM D1693 Cond. B) within the range from 70 to 250 hours. Such ESCR outperforms other unimodal resins of similar melt index and density, approaching ESCR performance of more expensive and complex resins with bimodal molecular weight distribution. The polyethylene compositions of certain embodiments may have two distinct crystalline fractions as shown by temperature rising elution fractionation (TREF).

Abstract: Provided herein are polymer compositions comprising a polymer and polymer processing aid (PPA) comprising a blend of at least two of: (i) a polyethylene glycol; (ii) a surfactant comprising a sorbitan ester or a polysorbate; and (iii) a metal salt of a fatty acid. The polymer can be a C2-C6 olefin homopolymer or a copolymer of two or more C2-C20 ?-olefins, and the polymer composition can take the form of polymer pellets; a polymer melt; reactor-grade polymer granules and/or polymer slurries; or other form of polymer composition containing the PPA and optionally one or more other additives. The polymer composition is preferably free or substantially free of fluorine, including fluoropolymer-based PPAs.

Abstract: Provided herein are polymer compositions and methods of making them, including blending a polymer and a polyethylene glycol (PEG) masterbatch. The PEG masterbatch can include one or more PEGs each having molecular weight less than 40,000 g/mol. The polymer can be a C2-C6 olefin homopolymer or a copolymer of two or more C2-C20 ?-olefins. The PEG masterbatch and resulting polymer composition is preferably free or substantially free of fluorine, including fluoropolymer-based PPAs.

Abstract: Provided herein are polymer compositions comprising a polymer and polymer processing aid (PPA) comprising a blend of at least two of: (i) a polyethylene glycol; (ii) a surfactant comprising a sorbitan ester or a polysorbate; and (iii) a metal salt of a fatty acid. The polymer can be a C2-C6 olefin homopolymer or a copolymer of two or more C2-C20 ?-olefins, and the polymer composition can take the form of polymer pellets; a polymer melt; reactor-grade polymer granules and/or polymer slurries; or other form of polymer composition containing the PPA and optionally one or more other additives. The polymer composition is preferably free or substantially free of fluorine, including fluoropolymer-based PPAs.

Abstract: Provided herein are polymer compositions and methods of making them, including blending a polymer and a polyethylene glycol (PEG) masterbatch. The PEG masterbatch can include one or more PEGs each having molecular weight less than 40,000 g/mol. The polymer can be a C2-C6 olefin homopolymer or a copolymer of two or more C2-C20 ?-olefins. The PEG masterbatch and resulting polymer composition is preferably free or substantially free of fluorine, including fluoropolymer-based PPAs.

Abstract: This invention relates to an oriented polyethylene film comprising polyethylene having: (A) a melt flow index of 1.0 g/10 min or more, (B) a density of 0.90 g/cm3 to less than 0.940 g/cm3, (C) a g?LCB of greater than 0.8, (D) ratio of comonomer content at Mz to comonomer content at Mw is greater than 1.0, (E) ratio of comonomer content at Mn to comonomer content at Mw is greater than 1.0, and (F) a ratio of the g?LCB to the g?Zave is greater than 1.0, where the film has a 1% secant in the transverse direction of 70,000 psi or more and Dart Drop of 350 g/mil or more.

Abstract: This invention relates to a biaxially-oriented polyethylene film comprising polyethylene having: (A) a melt index, I2, of 1.0 g/10 min or greater; (B) a density of 0.925 g/cm3 to 0.945 g/cm3; (C) a g?vis of less than 0.8; (D) an Mz of 1,000,000 g/mol or more; (E) an Mw/Mn of 5 or more; (F) an Mw of 100,000 g/mol or more; (G) a ratio of the g?LCB to the g?Zave is greater than 1.0; and (H) a Strain Hardening Ratio of 4 or more, where the film has a 1% secant in the transverse direction of 60,000 psi or more, a Dart Drop of 250 g/mil or more, and a ratio of 1% secant MD/1% secant TD is 0.65 or more.

Abstract: A biaxially-oriented film comprising a polyethylene having (A) a melt flow index of 1.0 g/10 min or more, (B) a density of 0.90 g/cm3 to less than 0.940 g/cm3, (C) a g?LCB of greater than 0.8, (D) ratio of comonomer content at Mz to comonomer content at Mw is greater than 1.0, (E) ratio of comonomer content at Mn to comonomer content at Mw is greater than 1.0, and (F) a ratio of the g?LCB to the g?zave is greater than 1.0, and where the film has a 1% secant in the transverse direction of 70,000 psi or more and Dart Drop of 350 g/mil or more.

Abstract: This invention relates to a method for forming a film including extruding the film from a polymer melt comprising a first polyolefin and 0.1 wt % to 30 wt % of a second polyolefin, wherein the second polyolefin has a density of at least 0.04 g/cm3 greater than a density of the first polyolefin, wherein a melt flow index of the first polyolefin is within 25% of a melt flow index of the second polyolefin, and wherein a polymer blend consisting of the first and second polyolefins in the same relative amounts as in the film has a multimodal differential scanning calorimetry melting profile above 40° C.; and stretching the film while the film is at a temperature above 25° C. and below the melting point of the second polyolefin to form elongated polyolefin structures in-situ in the film.

Abstract: This invention relates to blend, and films thereof, comprising: 1) semicrystalline cyclic olefin copolymer comprising less than 15 wt % of a C5-C40 cyclic olefin comonomer and greater than 85 wt % of a C2-C40 linear and/or branched olefin monomer content having a density of about 0.92 g/cm3 to about 0.94 g/cm3, modulus less than 20-80 kpsi, an elongation at break of 150-500%, and a glass transition temperatures less than 38° C.; 2) an amorphous cyclic olefin copolymer comprising more than 25 wt % of a C5-C40 cyclic olefin comonomer and less than 75 wt % of a C2-C40 linear and/or branched olefin monomer having a density greater than 1.0 g/cm3, a modulus of 260-380 kpsi, an elongation at break of <4%, and a glass transition temperature of 54 to 138° C.; and 3) a semicrystalline olefin copolymer comprising C2-C40 monomers having a density of about 0.90 g/cm3 to about 0.96 g/cm3, a modulus less than 150 kpsi, an elongation at break of greater than 400%, and a glass transition temperatures less than ?32° C.