Polyethylene-based compositions and films made therefrom

Abstract

[0003] Embodiments of the present invention relate to polyethylene-based compositions, monolayer films, multilayer films, laminates, and articles. In one aspect, the polyethylene-based composition comprises: (A) at least 95 wt. % of one or more polyethylenes, based on the total weight of the polyethylene-based composition; and (B) 250 to 15,000 ppm, based on the total weight of the polyethylene-based composition, of one or more polyethylenes having a number average molecular weight (M) of 1,000 to 40,000 g / mol. n and a polydimethylsiloxane having a viscosity of 0.865 to 0.915 g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min.

Description

[Technical Field]

[0001] The present disclosure relates to polyethylene-based compositions, films, and laminates comprising such polyethylene-based compositions.

[0002] Preface Film layers formed from ethylene-based polymers are used in a variety of applications, including, for example, food packaging and specialty packaging, in monolayer and multilayer films.

[0003] When polyethylene is used in one or more outer layers of a film, attention must be paid to the possibility that the outer surface of the film will adhere to other surfaces or to itself. Therefore, the outer surface of the polyethylene film typically requires a low coefficient of friction (COF) (e.g., less than 0.50) to allow the film to be processed efficiently, such as in a manufacturing or packaging line.

[0004] Polyethylene plastomers / elastomers and other low-density polyethylenes typically form a significant portion of the sealant layer in high-performance food packaging films. When such films are produced by blown film processing using polyethylene plastomers / elastomers as the inner layer of a bubble, it is known that as the bubble collapses, the plastomer / elastomer layers come into contact and adhere to each other, making it difficult to separate the two layers (a problem commonly referred to as "bubble blocking"). Furthermore, the plastomer / elastomer layers of such films have a high COF, making them difficult to convert into packages on vertical fill-and-seal lines.

[0005] There remains a need for polyethylene-containing films that have a low tendency to adhere to other surfaces (including themselves) and also have a low coefficient of friction (COF), for example, films that contain a significant amount of polyethylene plastomer / elastomer in a sealant layer or other surface layer of the film, and that have a low tendency to adhere to other surfaces (including themselves) and also have a low coefficient of friction (COF). Summary of the Invention

[0006] The present invention is directed to polyethylene plastomers / elastomers with lower densities (e.g., 0.865 to 0.915 g / cm 3 Provided are polyethylene-based compositions incorporating certain polydimethylsiloxane (PDMS) additives with one or more polyethylenes to provide compositions having a low COF. In some embodiments, such polyethylene-based compositions can be incorporated into outer layers of monolayer or multilayer films to achieve both low bubble blocking and low COF. Such monolayer or multilayer films can be incorporated into laminates, which can exhibit low coefficients of friction against metal and / or other surfaces. In some embodiments, such polyethylene-based compositions can further include one or more fatty acid amides, such as, for example, erucamide and / or behenamide.

[0007] In one embodiment, the polyethylene-based composition comprises (A) at least 95 wt. % of one or more polyethylenes, based on the total weight of the polyethylene-based composition; and (B) 250 to 15,000 ppm, based on the total weight of the polyethylene-based composition, of one or more polyethylenes having a number average molecular weight (M) of 1,000 to 40,000 g / mol. n and a polydimethylsiloxane having a viscosity of 0.865 to 0.915 g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min. In some embodiments, the polyethylene composition further comprises 250 to 2,500 ppm of erucamide and 250 to 2,500 ppm of behenamide, each based on the total weight of the polyethylene composition.

[0008] As discussed below, the present invention also provides monolayer films and multilayer films comprising any of the inventive polyethylene-based compositions disclosed herein. In some embodiments, a monolayer film comprising the inventive polyethylene-based composition described herein exhibits a coefficient of friction against itself and against metal of less than 0.40. In some embodiments, a multilayer film comprises a sealant layer having the inventive polyethylene-based composition described herein and exhibits a coefficient of friction against itself and against metal of less than 0.40.

[0009] As discussed below, the present invention also provides laminates formed from the inventive monolayer or multilayer films disclosed herein.

[0010] These and other embodiments are described in more detail in the detailed description. DETAILED DESCRIPTION OF THE INVENTION

[0011] Unless stated to the contrary, implicit from context, or customary in the art, all parts and percentages are by weight, all temperatures are in degrees Celsius, and all test methods are current as of the filing date of this disclosure.

[0012] Any reference to the Periodic Table of the Elements is to that published by CRC Press, Inc., 1990-1991. References to element groups in this table are by the new notation for numbering groups.

[0013] The term "alkenyl" (or "alkenyl group") refers to an organic radical derived from an aliphatic hydrocarbon by removing one hydrogen atom from an alkene group. A non-limiting example of an alkenyl group is a vinyl group. A "vinyl group" is a -CH=CH group.

[0014] "Alkoxy" (or "alkoxy group") means -OZ 1 Refers to radicals, typical Z1 includes alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, heterocycloalkyl, substituted heterocycloalkyl, silyl groups, and combinations thereof. Non-limiting examples of suitable alkoxy radicals include methoxy, ethoxy, benzyloxy, and t-butoxy.

[0015] The term "alkyl" (or "alkyl group") refers to an organic radical derived from an aliphatic hydrocarbon by removing one hydrogen atom from the aliphatic hydrocarbon. The alkyl group may be straight-chained, branched-chained, cyclic, or a combination thereof. The term "substituted alkyl" refers to an alkyl in which at least one hydrogen atom has been replaced with a substituent containing at least one heteroatom. Heteroatoms include, but are not limited to, O, N, P, and S. Substituents include halides, OR', NR'2, PR'2, P(=O)R'2, SiR'3, where each R' is independently C1-C 20 Hydrocarbyl groups are included, but are not limited to:

[0016] The term "alkynyl" (or "alkynyl group") refers to an organic radical derived from an aliphatic hydrocarbon by removing one hydrogen atom from an alkyne group.

[0017] The term "aryl" (or "aryl group") refers to an organic radical derived from an aromatic hydrocarbon by removing one hydrogen atom from the aromatic hydrocarbon. Aryl groups may be monocyclic and / or fused ring systems, each of which suitably contains 5 to 7, preferably 5 or 6, atoms. Also included are structures in which two or more aryl groups are linked through single bond(s). Specific examples include, but are not limited to, phenyl, tolyl, naphthyl, biphenyl, anthryl, indenyl, fluorenyl, benzofluorenyl, phenanthryl, triphenylenyl, pyrenyl, perylenyl, chrysenyl, naphthacenyl, fluoranthenyl, and the like. The term "substituted aryl" refers to an aryl in which at least one hydrogen atom has been replaced with a substituent containing at least one heteroatom. Heteroatoms include, but are not limited to, O, N, P, and S. Substituents include halide, OR', NR'2, PR'2, P(=O)R'2, SiR'3 (wherein each R' is independently C1 to C 20 Hydrocarbyl groups are included, but are not limited to:

[0018] "Cycloalkyl" refers to a saturated cyclic non-aromatic hydrocarbon radical having a single ring or multiple condensed rings. Non-limiting examples of suitable cycloalkyl radicals include cyclopentyl, cyclohexyl, cyclooctyl, bicyclooctyl, and the like. In specific embodiments, cycloalkyl has from 3 to 200 carbon atoms, from 3 to 50 carbon atoms, or from 3 to 20 carbon atoms.

[0019] As used herein, the term "composition" refers to the mixture of materials that make up the composition, as well as reaction products and decomposition products formed from the materials of the composition.

[0020] "Polymer" refers to a polymeric compound prepared by polymerizing monomers, whether of the same or different types. Thus, the generic term polymer encompasses the term homopolymer (used to refer to a polymer prepared from only one type of monomer, with the understanding that trace amounts of impurities may be incorporated into the polymer structure), and the term interpolymer, as defined below. Trace amounts of impurities (e.g., catalyst residues) may be introduced into and / or within the polymer. The polymer may be a single polymer, a polymer blend, or a polymer mixture, including a mixture of polymers formed in situ during polymerization.

[0021] As used herein, the term "interpolymer" refers to a polymer prepared by the polymerization of at least two different types of monomers. Thus, the generic term interpolymer includes copolymers (used to refer to polymers prepared from two different types of monomers) and polymers prepared from more than two different types of monomers.

[0022] As used herein, the terms "olefin-based polymer" or "polyolefin" refer to a polymer that contains, in polymerized form, a majority amount (based on the weight of the polymer) of an olefin monomer, e.g., ethylene or propylene, and may optionally contain one or more comonomers.

[0023] As used herein, the term "ethylene / α-olefin interpolymer" refers to an interpolymer that, in polymerized form, comprises a majority amount (greater than 50 mol%) of units derived from ethylene monomer, with the balance being derived from one or more α-olefins. Typical α-olefins used to form ethylene / α-olefin interpolymers are C3 to C6 10 It is an alkene.

[0024] As used herein, the term "ethylene / α-olefin copolymer" refers to a copolymer that contains, in polymerized form, a majority amount (greater than 50 mol %) of ethylene monomer and an α-olefin as the only two types of monomers.

[0025] As used herein, the term "α-olefin" refers to an alkene having a double bond in the primary or alpha (α) position.

[0026] "Polyethylene" or "ethylene-based polymer" means a polymer containing a majority amount (greater than 50 mol%) of units derived from ethylene monomers. This includes polyethylene homopolymers, ethylene / α-olefin interpolymers, and ethylene / α-olefin copolymers. Common forms of polyethylene known in the art include low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), ultra-low-density polyethylene (ULDPE), very low-density polyethylene (VLDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), reinforced polyethylene, polyethylene elastomers, and polyethylene plastomers. These polyethylene materials are generally known in the art. However, the following description may be helpful in understanding the differences between some of these different polyethylene resins.

[0027] The term "LDPE," which may also be referred to as "high pressure ethylene polymer" or "highly branched polyethylene," is defined to mean that the polymer is partially or fully homopolymerized or copolymerized in an autoclave or tubular reactor at pressures in excess of 14,500 psi (100 MPa) using a free radical initiator, such as peroxide (see, e.g., U.S. Pat. No. 4,599,392, incorporated by reference). LDPE resins typically have a viscosity of 0.916 to 0.935 g / cm. 3 The density is in the range of

[0028] The term "LLDPE" includes both resins made using traditional Ziegler-Natta and chromium-based catalyst systems, as well as single-site catalysts, including, but not limited to, bis-metallocene catalysts (sometimes referred to as "m-LLDPE"), constrained geometry catalysts (CGC), and molecular catalysts. Resins include linear, substantially linear, or heterogeneous polyethylene copolymers or homopolymers. LLDPE contains less long chain branching than LDPE and includes substantially linear ethylene polymers as further defined in U.S. Patent Nos. 5,272,236, 5,278,272, 5,582,923, and 5,733,155, homogeneously branched linear ethylene polymer compositions such as those in U.S. Patent No. 3,645,992, heterogeneously branched ethylene polymers such as those prepared according to the process disclosed in U.S. Patent No. 4,076,698, and / or blends thereof (such as those disclosed in U.S. Patent No. 3,914,342 or U.S. Patent No. 5,854,045). LLDPE may be made via gas phase, solution phase, or slurry polymerization, or any combination thereof, using any type of reactor or reactor configuration known in the art.

[0029] The term "MDPE" refers to 0.926-0.940 g / cm 3"MDPE" refers to polyethylene having a density of 1000 MPa or less. "MDPE" is typically made using chromium or Ziegler-Natta catalysts, or using single-site catalysts, including but not limited to bis-metallocene and constrained geometry catalysts, and typically has a molecular weight distribution ("MWD") greater than 2.5.

[0030] The term "HDPE" refers to a polymer with a viscosity of about 0.940 g / cm, typically prepared using a single-site catalyst, including but not limited to Ziegler-Natta, chromium, or bis-metallocene and constrained geometry catalysts. 3 Ultra-high and maximum approx. 0.970g / cm 3 It refers to polyethylene having a density of

[0031] The term "ULDPE" generally refers to polymers having a viscosity of 0.880-0.912 g / cm prepared using single-site catalysts, including but not limited to Ziegler-Natta catalysts, chromium catalysts, or bis-metallocene catalysts and constrained geometry catalysts. 3 It refers to polyethylene having a density of

[0032] "Polyethylene plastomer / elastomer" refers to a polymer that contains units derived from ethylene and at least one C3-C 10 A substantially linear or linear ethylene / α-olefin copolymer containing a uniform distribution of short chain branches comprising units derived from an α-olefin comonomer, or at least one C4-C8 α-olefin comonomer, or at least one C6-C8 α-olefin comonomer. The polyethylene plastomer / elastomer has a viscosity of 0.870 g / cm 3 , or 0.880 g / cm 3 , or 0.890 g / cm 3 From 0.900 g / cm 3 , or 0.902 g / cm 3 , or 0.904 g / cm 3 , or 0.909 g / cm 3 , or 0.910 g / cm 3Non-limiting examples of ethylene plastomers / elastomers include AFFINITY™ plastomers and elastomers (available from The Dow Chemical Company), EXACT Plastomers (available from ExxonMobil Chemical), Tafmer (available from Mitsui), Nexlene™ (available from SK Chemicals Co.), and Lucene (available from LG Chem Ltd.).

[0033] "Blend," "polymer blend," and like terms refer to a composition of two or more polymers. Such blends may or may not be miscible. Such blends may or may not be phase separated. Such blends may or may not contain one or more domain configurations as determined from transmission electron spectroscopy, light scattering, X-ray scattering, and any other method known in the art. A blend is not a laminate, although one or more layers of a laminate may contain the blend. Such blends may be prepared as dry blends or may be formed in situ (e.g., in a reactor), as melt blends, or using other techniques known to those skilled in the art.

[0034] "Adhesive contact" and like terms mean that one opposing surface of one layer and one opposing surface of another layer are touching and in bonding contact with each other such that one layer cannot be removed from the other without damaging the interlaminar surfaces (i.e., the contacting facial surfaces) of both layers.

[0035] The terms "comprising," "including," "having," and their derivatives are not intended to exclude the presence of any additional component, step, or procedure, whether specifically disclosed or not. For the avoidance of doubt, all compositions claimed through the use of the term "comprising" may include any additional additive, adjuvant, or compound, whether polymeric or otherwise, unless otherwise stated to the contrary. In contrast, the term "consisting essentially of" excludes from the scope of any succeeding description any other component, step, or procedure, except those that are not essential to operability. The term "consisting of" excludes any component, step, or procedure not specifically delineated or listed.

[0036] In one embodiment, the polyethylene-based composition of the present invention comprises (A) at least 95 wt. % of one or more polyethylenes, based on the total weight of the polyethylene-based composition; and (B) 250 to 15,000 ppm, based on the total weight of the polyethylene-based composition, of one or more polyethylenes having a number average molecular weight (M) of 1,000 to 40,000 g / mol. n and a polydimethylsiloxane having a viscosity of 0.865 to 0.915 g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min. In some embodiments, the polydimethylsiloxane has a number average molecular weight (M) of 1,000 to 2,500 g / mol. n In some embodiments, the polyethylene-based composition further comprises 250 to 2,500 ppm of a primary unsaturated fatty acid amide (e.g., erucamide) and 250 to 2,500 ppm of a linear saturated fatty acid amide (e.g., behenamide), each based on the total weight of the polyethylene-based composition. In some embodiments of the polyethylene-based composition, the one or more polyethylenes have a densitometric value of 0.885 to 0.910 g / cm. 3and a melt index (I2) of 0.5 to 25 g / 10 min. The polyethylene-based composition, in some embodiments, further comprises up to 20,000 ppm, based on the total weight of the polyethylene-based composition, of an inorganic antiblocking agent. In some embodiments, the polyethylene-based composition further comprises up to 5,000 ppm of a fatty acid amide selected from the group consisting of stearamide, oleamide, palmitamide, isostearamide, ethylene-bis-oleamide, and ethylene-bis-stearamide, and combinations thereof. The polyethylene-based composition, in some embodiments, further comprises 250 to 15,000 ppm, based on the total weight of the polyethylene-based composition, of a fatty acid amide having a number average molecular weight (M) greater than 40,000 g / mol. n As discussed further herein, the polyethylene-based composition may optionally include a variety of common additives well known to those skilled in the art to achieve additional functional performance, such as antioxidants, anti-fog agents, anti-static agents, processing aids, nucleating agents, and the like.

[0037] The present invention also relates to a monolayer film. The monolayer film, in various embodiments, comprises any one of the inventive polyethylene-based compositions disclosed herein. In some embodiments, the monolayer film exhibits a coefficient of friction against itself and against metal of less than 0.40. Some embodiments of the present invention relate to a laminate comprising a monolayer film comprising any one of the inventive polyethylene-based compositions disclosed herein. In some embodiments, the monolayer film side of the laminate exhibits a coefficient of friction against metal of less than 0.50.

[0038] The present invention also relates to a multilayer film. The multilayer film, in various embodiments, comprises any one of the inventive polyethylene-based compositions disclosed herein. In some embodiments, the sealant layer of the multilayer film comprises the polyethylene-based composition, and the sealant layer exhibits a coefficient of friction against itself and against metal of less than 0.40. In some embodiments, the inner layer of the multilayer film comprises the polyethylene-based composition of the present invention. Some embodiments of the present invention relate to an oriented multilayer film comprising a sealant layer, wherein the sealant layer comprises the polyethylene-based composition of the present invention. In such embodiments, the multilayer film may be stretched in the machine direction or biaxially stretched.

[0039] Some embodiments of the present invention relate to laminates comprising a multilayer film comprising any one of the polyethylene-based compositions of the present invention disclosed herein. In some laminate embodiments, the sealant layer of the multilayer film comprises the polyethylene-based composition, the sealant layer is an outer layer of the laminate, and the sealant layer of the multilayer film exhibits a coefficient of friction against metal of less than 0.50. In some embodiments, the multilayer film in the laminate is laminated to a second film, the second film being a biaxially oriented film or a machine-direction oriented second film, and the second film comprises at least 95 wt. % of one or more polyethylenes, based on the total weight of the second film. The second film may be a monolayer film or a multilayer film. In some embodiments, the multilayer film in the laminate is laminated to a second film, the second film comprising a material other than polyethylene, such as polypropylene, polyethylene terephthalate, and polyamide. In some embodiments, the sealant side of the laminate exhibits a coefficient of friction against metal of less than 0.50.

[0040] Polyethylene-based composition The present disclosure provides a polyethylene-based composition. In one embodiment, the polyethylene-based composition comprises: (A) at least 95 wt. % of one or more polyethylenes, based on the total weight of the polyethylene-based composition; and (B) 250 to 15,000 ppm of one or more polyethylenes having a number average molecular weight (M) of 1,000 to 40,000 g / mol, based on the total weight of the polyethylene-based composition. n and a polydimethylsiloxane having a viscosity of 0.865 to 0.915 g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min.

[0041] A. Polyethylene The composition contains at least 95% by weight of one or more polyethylenes. Such polyethylenes have a density of 0.865 to 0.915 g / cm. 3 and a melt index (I2) of 0.5 to 25 g / 10 min. In some embodiments, the one or more polyethylenes each have a density of 0.885 to 0.910 g / cm. 3 and a melt index (I2) of 0.5 to 25 g / 10 min.

[0042] Non-limiting examples of suitable ethylene-based polymers include polyethylene plastomer / elastomer, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), very low density polyethylene (ULDPE), very low density polyethylene (VLDPE), reinforced polyethylene, and ethylene / α-olefin multiblock copolymers (also known as olefin block copolymers (OBC)).

[0043] In some embodiments, the one or more polyethylenes comprise a polyethylene plastomer / elastomer, which comprises units derived from ethylene and C3 to C6. 10In an embodiment, the polyethylene plastomer / elastomer is an ethylene / C4-C8 α-olefin copolymer having one, some, or all of the following properties: (a) a density of 0.865 g / cc, or 0.870 g / cc, or 0.880 g / cc, or 0.885 g / cc, or 0.890 g / cc to 0.900 g / cc, or 0.902 g / cc, or 0.904 g / cc, or 0.909 g / cc, or 0.910 g / cc, or 0.915 g / cc; and / or (b) a melt index from 0.5 g / 10 min, or 1 g / 10 min, to 1.5 g / 10 min, or 2.0 g / 10 min, or 3.0 g / 10 min, or 5.0 g / 10 min, or 6.0 g / 10 min, or 8.0 g / 10 min, or 10 g / 10 min, or 15 g / 10 min, or 20 g / 10 min, or 25 g / 10 min; and / or (c) A melting point (Tm) of from 40°C, or 45°C, or 50°C, or 55°C, or 60°C, or 65°C, or 70°C, or 75°C to 80°C, or 85°C, or 90°C, or 95°C, or 100°C, or 105°C, or 110°C, or 115°C, or 120°C.

[0044] In some embodiments, the polyethylene plastomer / elastomer has a viscosity of 0.885 to 0.910 g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min.

[0045] In an embodiment, the polyethylene plastomer / elastomer is an ethylene / 1-octene copolymer having a density of 0.902 g / cc, a melt index of 1.0 g / 10 min, and a melting point of 99° C. In a further embodiment, the ethylene plastomer / elastomer is AFFINITY™ PL 1880G, available from The Dow Chemical Company.

[0046] In some embodiments, the one or more polyethylenes comprise low density polyethylene (LDPE). LDPE is an ethylene homopolymer, or a polymer containing units derived from ethylene and C3 to C6. 10 LDPE may be an ethylene / α-olefin copolymer consisting of an α-olefin comonomer, or a C4-C8 α-olefin comonomer, or a C6-C8 α-olefin comonomer. LDPE has one or both of the following properties: (a) a density of 0.915 g / cc, or 0.920 g / cc, or 0.925 g / cc, up to 0.930 g / cc, or 0.935 g / cc, or 0.940 g / cc; and / or (b) A melt index from 0.5 g / 10 min, or 1 g / 10 min, 1.5 g / 10 min, or 2.0 g / 10 min, to 3.0 g / 10 min, or 5.0 g / 10 min, or 6.0 g / 10 min, or 8.0 g / 10 min, or 10 g / 10 min, or 15 g / 10 min, or 20 g / 10 min, or 25 g / 10 min.

[0047] The polyethylene-based composition may contain more than one polyethylene. In some embodiments, the polyethylene-based composition comprises at least two polypropylenes, each polypropylene being compositionally, structurally, and / or physically distinct from the others. In one embodiment, the polyethylene-based composition comprises a polyethylene plastomer / elastomer and LDPE.

[0048] The polyethylene-based composition comprises at least 95 wt% of one or more polyethylenes, hi some embodiments, the polyethylene-based composition contains 95 wt%, or 96 wt%, or 97 wt%, or 98 wt%, or 99 wt%, or 99.9 wt% polyethylene, based on the total weight of the polyethylene-based composition.

[0049] The one or more polyethylenes may comprise two or more embodiments discussed herein.

[0050] B. Polydimethylsiloxane The polyethylene composition contains 250 to 15,000 ppm of polyethylene glycol having a number average molecular weight (M) of 1,000 to 40,000 g / mol, based on the total weight of the polyethylene composition. n "Polydimethylsiloxane" ("PDMS") is a polydimethylsiloxane having the following general structure (I):

[0051] [ka] (where n is the number of repeating monomer [SiO(CH3)2] units, and n is 2 or more, or 2 to 20,000). PDMS may be unsubstituted or substituted. "Substituted PDMS" refers to PDMS in which at least one methyl group in structure (I) has been substituted with a substituent. Non-limiting examples of the substituent include halogen atoms (such as chlorine, fluorine, bromine, and iodine); halogen-containing groups (such as chloromethyl, perfluorobutyl, trifluoroethyl, and nonafluorohexyl); oxygen-containing groups (such as hydroxy, alkoxy (such as methoxy and ethoxy), (meth)acrylepoxy, and carboxyl); nitrogen-containing groups (such as amino, amide, and cyano functional groups); sulfur-containing groups (such as mercapto); hydrogen; C2 to C6 10 Alkyl groups (e.g., ethyl groups); C2-C 10Examples of suitable substituted PDMS include alkynyl groups, alkenyl groups (such as vinyl and hexenyl groups), aryl groups (such as phenyl and substituted phenyl groups), cycloalkyl groups (such as cyclohexane), and combinations thereof. The substituted methyl groups may be terminal or non-terminal methyl groups. Non-limiting examples of suitable substituted PDMS include those in which at least one alkyl is C2-C6. 10 Examples of the substituted PDMS include alkyl, trialkylsilyl, dialkylhydroxysilyl, dialkylhydrogensilyl, dialkylalkenylsilyl, and dialkylvinylsilyl. In one embodiment, the substituted PDMS is dimethylhydroxysilyl-terminated PDMS. In another embodiment, the substituted PDMS is dimethylvinylsilyl-terminated PDMS. In an embodiment, the substituted PDMS excludes nitrogen atom-containing groups. In another embodiment, the substituted PDMS excludes epoxy substituents. In an embodiment, the PDMS is unsubstituted. "Unsubstituted PDMS" refers to a PDMS of structure (I) in which none of the methyl groups in structure (I) are replaced with a substituent. In an embodiment, the unsubstituted PDMS is a trimethylsilyl-terminated PDMS.

[0052] The polyethylene composition contains 250 to 15,000 ppm of polyethylene glycol having a number average molecular weight (M) of 1,000 to 40,000 g / mol, based on the total weight of the polyethylene composition. n In some embodiments, the PDMS comprises a polydimethylsiloxane having a number average molecular weight (M) of 1,000 to 1,500 g / mol, or 1,500 to 2,500 g / mol, or 2,500 to 5,000 g / mol, or 5,000 to 10,000 g / mol, or 10,000 to 15,000 g / mol, or 15,000 to 20,000 g / mol, or 20,000 to 25,000 g / mol, or 25,000 to 30,000 g / mol, or 30,000 to 35,000 g / mol, or 35,000 to 40,000 g / mol. n )

[0053] In some embodiments, the PDMS has a weight average molecular weight (M) of 1,250 to 1,750 g / mol, or 1,750 to 3,250 g / mol, or 3,250 to 6,000 g / mol, or 6,000 to 15,000 g / mol, or 15,000 to 25,000 g / mol, or 25,000 to 35,000 g / mol, or 35,000 to 45,000 g / mol, or 45,000 to 55,000 g / mol, or 55,000 to 65,000 g / mol, or 65,000 to 75,000 g / mol, or 75,000 to 90,000 g / mol. w )

[0054] In some embodiments, the PDMS has a molecular weight distribution (M) of 1.0-3.0, or 1.0, or 1.2, or 1.3, or 1.4, or 1.5, or 1.6, or 1.7, or 1.8, or 1.9, or 2.0, or 2.1, or 2.2, or 2.3, to 2.5, or 2.5-2.7, or 2.7-3.0. w / M n )

[0055] In some embodiments, the PDMS has the structure (I) where n is from 10 to 550, or 10, or 15, or 20, or 25, or 30, or 35, or 40, or 45, or 50, or 60, or 70, or 80, or 82, or 90, 110, or 130, or 150, or 170, or 200, or 250, or 300, or 350, or 400, to 450, or 500, or 550.

[0056] In some embodiments, the PDMS is unsubstituted PDMS. In some embodiments, the PDMS (such as unsubstituted PDMS) has a number average molecular weight (M) of 1,000 g / mol to 40,000 g / mol. n ), and PDMS has one, some, or all of the following properties: (a) a weight average molecular weight (Mw) of from 50,000 g / mol, or 55,000 g / mol, or 60,000 g / mol, or 65,000 g / mol, or 70,000 g / mol, or 75,000 g / mol, or 80,000 g / mol, or 90,000 g / mol, or 100,000 g / mol, or 120,000 g / mol to 130,000 g / mol, or 150,000 g / mol; and / or (b) a molecular weight distribution (Mw / Mn) of 2.2, or 2.3, or 2.4 to 2.5, or 2.6; and / or (c) Low Mn PDMS has the structure (I), where n is from 2, or 5, or 10, or 50, or 100, or 150, or 200, or 250, or 300, or 350, or 400, or 450, or 500, or 550, or 600, or 650, to 700, or 750, or 800, or 850, or 900, or 950, or 1000, or 1100, or 1200, or 1300, or 1400, or 1500, or 1600, or 1700, or 1800, or 1900, or 2000, or 2500, or 3000, to 3500, or 4000, or 4500.

[0057] The polyethylene-based composition has an M of from 1,000 to 40,000 g / mol, or in some embodiments from 1,000 to less than 30,000 g / mol. n The PDMS may contain more than one such PDMS having

[0058] Number average molecular weight (M) of 1,000 to 40,000 g / mol or 1,000 to 30,000 g / mol n ) may include two or more embodiments discussed herein.

[0059] In some embodiments, the polyethylene-based composition comprises 250 to 15,000 ppm, based on the total weight of the polyethylene-based composition, of polyethylene having a number average molecular weight (M n ) polydimethylsiloxane ("high M n In some embodiments, the high M n The PDMS has a number average molecular weight (Mn) of greater than 40,000 g / mol and less than 500,000 g / mol.

[0060] In some embodiments, high M n The PDMS has a number average molecular weight (M) of from 40,000 g / mol, or 45,000 g / mol, or 50,000 g / mol, or 55,000 g / mol, or 60,000 g / mol, or 65,000 g / mol, or 70,000 g / mol, or 75,000 g / mol, or 80,000 g / mol, or 90,000 g / mol, or 100,000 g / mol, or 150,000 g / mol, or 200,000 g / mol, or 250,000 g / mol, or 300,000 g / mol, or 350,000 g / mol to 400,000 g / mol, or 450,000 g / mol, or less than 500,000 g / mol. n )

[0061] In some embodiments, high M n The PDMS has a number average molecular weight (M) of from 40,000 g / mol, or 45,000 g / mol, or 50,000 g / mol, or 55,000 g / mol, or 60,000 g / mol, or 65,000 g / mol to 70,000 g / mol, or 75,000 g / mol, or less than 80,000 g / mol. n )

[0062] In some embodiments, high M nThe PDMS has a weight average molecular weight (M) of from 40,000 g / mol, or 50,000 g / mol, or 60,000 g / mol, or 70,000 g / mol, or 80,000 g / mol, or 90,000 g / mol, or 100,000 g / mol, or 110,000 g / mol, or 120,000 g / mol, or 150,000 g / mol, or 200,000 g / mol, or 250,000 g / mol to 300,000 g / mol, or 400,000 g / mol, or 500,000 g / mol, or 600,000 g / mol to 700,000 g / mol, or 900,000 g / mol, or less than 1,100,000 g / mol. w )

[0063] In some embodiments, high M n The PDMS has a molecular weight distribution (M) ranging from 1.0, or 1.5, or 2.0, or 2.1, or 2.2, or 2.3, or 2.4, or 2.5, or 2.6, or 2.7, or 2.8, or 2.9, to 3.0, or 3.5. w / M n )

[0064] In some embodiments, high M n The PDMS has the structure (I) where n is from 500, or 550, or 600, or 650, to 700, or 750, or 800, or 850, or 900, or 950, or 1000, or 1100, or 1200, or 1300, or 1400, or 1500, or 1600, or 1700, or 1800, or 1900, or 2000, or 2500, or 3000, or 3500, or 4000, or 4500, or 5000, or 5500, to 6000, or 6500, or 7000.

[0065] In some embodiments, high M n The PDMS is unsubstituted PDMS. In some embodiments, a high M nPDMS (such as unsubstituted PDMS) has a number average molecular weight (M) of 40,000 g / mol, or 45,000 g / mol, or 48,000 g / mol, to 49,000 g / mol, or 50,000 g / mol. n ) and has high M n PDMS has one, some, or all of the following properties: (a) A weight average molecular weight (M) of from 40,000 g / mol, or 50,000 g / mol, or 60,000 g / mol, or 70,000 g / mol, or 80,000 g / mol, or 90,000 g / mol, or 100,000 g / mol, or 110,000 g / mol, or 120,000 g / mol, or 150,000 g / mol, or 200,000 g / mol, or 250,000 g / mol to 300,000 g / mol, or 400,000 g / mol, or 500,000 g / mol, or 600,000 g / mol to 700,000 g / mol, or 900,000 g / mol, or to less than 1,100,000 g / mol. w ), and / or (b) a molecular weight distribution (Mw / Mn) of from 1.0, or 1.5, or 2.0, or 2.1, or 2.2, or 2.3, or 2.4 to 2.5, or 2.6, or 2.7, or 2.8, or 2.9, or 3.0, or 3.5; and / or (c) High M n The PDMS has the structure (I) where n is from 500, or 550, or 600, or 650, to 700, or 750, or 800, or 850, or 900, or 950, or 1000, or 1100, or 1200, or 1300, or 1400, or 1500, or 1600, or 1700, or 1800, or 1900, or 2000, or 2500, or 3000, or 3500, or 4000, or 4500, or 5000, or 5500, to 6000, or 6500, or 7000.

[0066] The polyethylene-based composition may, in some embodiments, comprise more than one high M n It may contain PDMS.

[0067] High M n PDMS is a polymer with a higher M as discussed herein. n It may include two or more embodiments of:

[0068] C. Other additives The polyethylene-based composition may further comprise other additives as further discussed herein. In particular, in some embodiments, it has proven beneficial to include at least one unsaturated primary fatty acid amide (e.g., erucamide) and at least one linear saturated primary fatty acid amide (e.g., behenamide) in the polyethylene-based composition.

[0069] In some embodiments, the polyethylene-based composition comprises an unsaturated primary fatty acid amide having a melting point of 100° C. or less. An “unsaturated primary fatty acid amide” is defined as an amide having Structure (II):

[0070] [ka] (Wherein R is a monounsaturated or polyunsaturated C3-C 24 In embodiments, R is a molecule having a C 11 ~C 24 Or C 15 ~C 23 C, which is an alkyl moiety or monounsaturated or polyunsaturated 17 ~C 21 A "monounsaturated" alkyl moiety is an alkyl having one double bond (C=C bond) and all remaining carbon atoms being bonded via single bonds (C=C bonds). A "polyunsaturated" alkyl moiety is an alkyl having at least two double bonds (C=C bonds). In embodiments, R is C 17 alkyl moiety, and monounsaturated or polyunsaturated C 21In some embodiments, R is selected from alkyl moieties. In embodiments, R is monounsaturated. Non-limiting examples of suitable unsaturated primary fatty acid amides include erucamide, oleamide, and combinations thereof. In some embodiments, the polyethylene-based composition comprises up to 5,000 ppm of an unsaturated fatty acid amide selected from the group consisting of erucamide and oleamide. In some embodiments, the polyethylene-based composition comprises up to 2,500 ppm of an unsaturated primary fatty acid amide, such as erucamide and oleamide.

[0071] In some embodiments, the polyethylene-based composition further comprises 250 to 2,500 ppm of erucamide, based on the total weight of the polyethylene-based composition. In some embodiments, the polyethylene-based composition further comprises 1,000 to 2,000 ppm of erucamide, based on the total weight of the polyethylene-based composition. In some embodiments, the polyethylene-based composition further comprises 1,250 to 1,750 ppm of erucamide, based on the total weight of the polyethylene-based composition.

[0072] In embodiments where the polyethylene-based composition comprises a linear saturated fatty amide, the saturated primary fatty amide may have a melting point above 100° C. A “saturated primary fatty amide” is defined as having Structure (III):

[0073] [ka] (In the formula, R 1 is saturated C3~C 27 In embodiments, R 1 is C 11 ~C 25 Or C 15 ~C 23 Alkyl moiety or saturated C 15 ~C 21A "saturated" alkyl moiety is an alkyl in which all carbon atoms are bonded to each other through single bonds (C-C bonds). In other words, a saturated alkyl moiety excludes carbon atoms bonded through double bonds (C=C bonds). In embodiments, R 1 is C 17 Alkyl moiety and saturated C 21 "Linear saturated primary fatty acid amide", R 1 is linear (unbranched). Non-limiting examples of suitable saturated primary fatty acid amides include behenamide, palmitamide, stearamide, isostearamide, ethylene-bis-oleamide, and combinations thereof.

[0074] In some embodiments, saturated primary fatty acid amides of structure (IV), R 1 is the saturated C 21 In a further embodiment, the saturated primary fatty acid amide is R 1 is a linear C 21 The alkyl moiety is behenamide.

[0075] In some embodiments, the polyethylene composition comprises 250 to 2,500 ppm of erucamide and 250 to 2,500 ppm of behenamide, based on the total weight of the polyethylene composition. In some embodiments, the polyethylene composition comprises 1,000 to 2,000 ppm of erucamide and 1,000 to 2,000 ppm of behenamide, based on the total weight of the polyethylene composition. In some embodiments, the polyethylene composition further comprises 1,250 to 1,750 ppm of behenamide, based on the total weight of the polyethylene composition.

[0076] In some embodiments, the polyethylene-based composition further comprises (in addition to erucamide and behenamide) up to 5,000 ppm of an additional fatty acid amide selected from the group consisting of stearamide, oleamide, palmitamide, isostearamide, ethylene-bis-oleamide, and ethylene-bis-stearamide, and combinations thereof.

[0077] In some embodiments where the polyethylene-based composition comprises 250 to 2,500 ppm erucamide and 250 to 2,500 ppm behenamide, the composition may further comprise up to 5,000 ppm of a fatty acid amide selected from the group consisting of stearamide, oleamide, palmitamide, isostearamide, ethylene-bis-oleamide, and ethylene-bis-stearamide, and combinations thereof.

[0078] In some embodiments, the polyethylene-based composition may further comprise an inorganic antiblocking agent. An "antiblocking agent" is a compound that minimizes or prevents blocking (i.e., adhesion) between two adjacent layers of a film by microscopically roughening the surface of the film layer to reduce the open contact area between the adjacent layers. Non-limiting examples of suitable inorganic antiblocking agents include silica, talc, and combinations thereof. In some embodiments, the polyethylene-based composition may comprise up to 20,000 ppm of the inorganic blocking agent based on the total weight of the polyethylene-based composition. In some embodiments, the polyethylene-based composition comprises 250 to 20,000 ppm of the inorganic blocking agent (e.g., silica and / or talc) based on the total weight of the polyethylene-based composition.

[0079] In some embodiments, the composition may include one or more other additives. Non-limiting examples of suitable other additives include antioxidants, antistatic agents, stabilizers, nucleating agents, colorants, pigments, ultraviolet (UV) absorbers or stabilizers, flame retardants, compatibilizers, plasticizers, fillers, processing aids, anti-fog additives, crosslinkers (e.g., peroxides), and combinations thereof.

[0080] In some embodiments, the polyethylene-based composition comprises: (A) at least 95 wt. % of one or more polyethylenes, based on the total weight of the polyethylene-based composition; (B) 250 to 15,000 ppm of polyethylene glycol having a number average molecular weight (M) of 1,000 to 40,000 g / mol based on the total weight of the polyethylene-based composition. nand a polydimethylsiloxane having a viscosity of 0.865 to 0.915 g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min.

[0081] In some embodiments, the polyethylene-based composition comprises: (A) at least 95 wt. % of one or more polyethylenes, based on the total weight of the polyethylene-based composition; (B) 250 to 15,000 ppm of polyethylene glycol having a number average molecular weight (M) of 1,000 to 2,500 g / mol based on the total weight of the polyethylene-based composition. n and a polydimethylsiloxane having a viscosity of 0.865 to 0.915 g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min.

[0082] In some embodiments, the polyethylene-based composition comprises: (A) at least 95 wt. % of one or more polyethylenes, based on the total weight of the polyethylene-based composition; (B) 250 to 15,000 ppm based on the total weight of the polyethylene-based composition, and a number average molecular weight (M n and a polydimethylsiloxane having a viscosity of 0.865 to 0.915 g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min.

[0083] In some embodiments, the polyethylene-based composition comprises: (A) at least 95 wt. % of one or more polyethylenes, based on the total weight of the polyethylene composition, the one or more polyethylenes comprising a polyethylene plastomer / elastomer; (B) 250 to 15,000 ppm based on the total weight of the polyethylene-based composition, and a number average molecular weight (M nand a polydimethylsiloxane having a viscosity of 0.865 to 0.915 g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min.

[0084] In some embodiments, the polyethylene-based composition comprises: (A) at least 95 wt. % of the polyethylene-based composition, based on the total weight of the composition, 0.865 to 0.915 g / cm 3 and one or more polyethylenes having a density of 0.5 to 25 g / 10 min and a melt index (I2) of 0.5 to 25 g / 10 min; (B) 250 to 15,000 ppm based on the total weight of the polyethylene-based composition, and a number average molecular weight (M n and a polydimethylsiloxane having a viscosity of 0.865 to 0.915 g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min.

[0085] In some embodiments, the polyethylene-based composition comprises: (A) at least 95 wt. % of the polyethylene-based composition, based on the total weight of the polyethylene-based composition, from 0.885 to 0.910 g / cm 3 and one or more polyethylenes having a density of 0.5 to 25 g / 10 min and a melt index (I2) of 0.5 to 25 g / 10 min; (B) 250 to 15,000 ppm based on the total weight of the polyethylene-based composition, and a number average molecular weight (M n and a polydimethylsiloxane having a viscosity of 0.865 to 0.915 g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min.

[0086] In some embodiments, the polyethylene-based composition comprises: (A) at least 95 wt. % of the polyethylene-based composition, based on the total weight of the polyethylene-based composition, from 0.885 to 0.910 g / cm 3 and one or more polyethylenes having a density of 0.5 to 25 g / 10 min and a melt index (I2) of 0.5 to 25 g / 10 min; (B) 250 to 15,000 ppm based on the total weight of the polyethylene-based composition, and a number average molecular weight (M n and a polydimethylsiloxane having a viscosity of 0.865 to 0.915 g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min.

[0087] In some embodiments, the polyethylene-based composition comprises: (A) at least 95 wt. % of one or more polyethylenes, based on the total weight of the polyethylene-based composition; (B) 250 to 15,000 ppm based on the total weight of the polyethylene-based composition, and a number average molecular weight (M n ) a polydimethylsiloxane having (C) 250 to 2,500 ppm of erucamide; (D) 250 to 2500 ppm behenamide, 0.865~0.915g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min. In some embodiments, the polyethylene-based composition comprises 1,000 to 2,000 ppm erucamide and 1,000 to 2,000 ppm behenamide.

[0088] In some embodiments, the polyethylene-based composition comprises: (A) at least 95 wt. % of one or more polyethylenes, based on the total weight of the polyethylene composition, the one or more polyethylenes comprising a polyethylene plastomer / elastomer; (B) 250 to 15,000 ppm based on the total weight of the polyethylene-based composition, and a number average molecular weight (M n ) a polydimethylsiloxane having (C) 250 to 2,500 ppm of erucamide; (D) 250 to 2500 ppm behenamide, 0.865~0.915g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min. In some embodiments, the polyethylene-based composition comprises 1,000 to 2,000 ppm erucamide and 1,000 to 2,000 ppm behenamide.

[0089] In some embodiments, the polyethylene-based composition comprises: (A) at least 95 wt. % of the polyethylene-based composition, based on the total weight of the composition, 0.865 to 0.915 g / cm 3 and one or more polyethylenes having a density of 0.5 to 25 g / 10 min and a melt index (I2) of 0.5 to 25 g / 10 min; (B) 250 to 15,000 ppm based on the total weight of the polyethylene-based composition, and a number average molecular weight (M n ) and (polyethylene-based composition has a density of 0.865 to 0.915 g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min), (C) 250 to 2,500 ppm of erucamide; (D) 250 to 2500 ppm behenamide, 0.865~0.915g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min. In some embodiments, the polyethylene-based composition comprises 1,000 to 2,000 ppm erucamide and 1,000 to 2,000 ppm behenamide.

[0090] In some embodiments, the polyethylene-based composition comprises: (A) at least 95 wt. % of the polyethylene-based composition, based on the total weight of the polyethylene-based composition, from 0.885 to 0.910 g / cm 3 and one or more polyethylenes having a density of 0.5 to 25 g / 10 min and a melt index (I2) of 0.5 to 25 g / 10 min; (B) 250 to 15,000 ppm based on the total weight of the polyethylene-based composition, and a number average molecular weight (M n ) a polydimethylsiloxane having (C) 250 to 2,500 ppm of erucamide; (D) 250 to 2500 ppm behenamide, 0.865~0.915g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min. In some embodiments, the polyethylene-based composition comprises 1,000 to 2,000 ppm erucamide and 1,000 to 2,000 ppm behenamide.

[0091] In some embodiments, the polyethylene-based composition comprises: (A) at least 95 wt. % of one or more polyethylenes, based on the total weight of the polyethylene-based composition; (B) 250 to 15,000 ppm based on the total weight of the polyethylene-based composition, and a number average molecular weight (M n ) a polydimethylsiloxane having (C) 250 to 20,000 ppm of an inorganic antiblocking agent comprising silica and / or talc; (D) 250 to 2,500 ppm of erucamide; (E) 250 to 2500 ppm behenamide, 0.865~0.915g / cm 3and a melt index (I2) of 0.5 to 25 g / 10 min. In some embodiments, the polyethylene-based composition comprises 1,000 to 2,000 ppm erucamide and 1,000 to 2,000 ppm behenamide.

[0092] In some embodiments, the polyethylene-based composition comprises: (A) at least 95 wt. % of one or more polyethylenes, based on the total weight of the polyethylene-based composition; (B) 250 to 15,000 ppm based on the total weight of the polyethylene-based composition, and a number average molecular weight (M n ) a polydimethylsiloxane having (C) 250 to 15,000 ppm, based on the total weight of the polyethylene-based composition, of a number average molecular weight (M) of more than 40,000 g / mol and up to 500,000 g / mol n ) a polydimethylsiloxane having (D) 250 to 2,500 ppm of erucamide; (E) 250 to 2500 ppm behenamide, 0.865~0.915g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min. In some embodiments, the polyethylene-based composition comprises 1,000 to 2,000 ppm erucamide and 1,000 to 2,000 ppm behenamide.

[0093] In some embodiments, the polyethylene-based composition comprises: (A) at least 95 wt. % of one or more polyethylenes, based on the total weight of the polyethylene-based composition; (B) 250 to 15,000 ppm based on the total weight of the polyethylene-based composition, and a number average molecular weight (M n ) a polydimethylsiloxane having (C) 250 to 15,000 ppm, based on the total weight of the polyethylene-based composition, of a number average molecular weight (M) of more than 40,000 g / mol and up to 500,000 g / mol n ) a polydimethylsiloxane having (D) 250 to 20,000 ppm of an inorganic antiblocking agent comprising silica and / or talc; (E) 250 to 2,500 ppm of erucamide, (F) 250 to 2500 ppm behenamide, 0.865~0.915g / cm 3 and a melt index (I2) of 0.5 to 25 g / 10 min. In some embodiments, the polyethylene-based composition comprises 1,000 to 2,000 ppm erucamide and 1,000 to 2,000 ppm behenamide.

[0094] film In some embodiments, the invention relates to a film formed from any of the inventive polyethylene-based compositions as described herein. In some embodiments, the film is a monolayer film. In some further embodiments, the monolayer film exhibits a coefficient of friction against itself and against metal of less than 0.40.

[0095] In some embodiments, the film is a multilayer film. In some embodiments, the multilayer film comprises a sealant layer, the sealant layer comprising any of the inventive polyethylene-based compositions described herein. In some further embodiments, the sealant layer exhibits a coefficient of friction against itself and against metal of less than 0.40.

[0096] Monolayer films and sealant layers of multilayer films incorporating the inventive polyethylene-based compositions described herein advantageously exhibit a relatively low coefficient of friction against itself and against metal, as well as low bubble blocking. In some embodiments, monolayer films incorporating one or more of the inventive polyethylene-based compositions described herein exhibit a coefficient of friction against itself and against metal of less than 0.40. In some embodiments, sealant layers of multilayer films incorporating one or more of the inventive polyethylene-based compositions described herein exhibit a coefficient of friction against itself and against metal of less than 0.40. The coefficients of friction of monolayer films against metal and of sealant layers against itself and against metal are measured according to ASTM D1894.

[0097] The films of the present invention can have a variety of thicknesses. The thickness of the film can depend on several factors, including, for example, whether the film is a monolayer film or a multilayer film, the other layers of the film if a multilayer film, the desired properties of the film, the end use of the film, and the equipment available to manufacture the film. In some embodiments, the films of the present invention have a thickness of up to 10 mils. For example, blown films can have thicknesses ranging from a lower limit of 0.25 mil, 0.5 mil, 0.7 mil, 1.0 mil, 1.75 mil, or 2.0 mil to an upper limit of 4.0 mil, 6.0 mil, 8.0 mil, or 10 mil.

[0098] In embodiments where the film comprises a multilayer film, the number of layers in the film can depend on several factors including, for example, the desired properties of the film, the desired thickness of the film, the content of other layers in the film, the end use of the film, the equipment available to manufacture the film, etc. The multilayer blown film can, in various embodiments, include up to 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 layers.

[0099] In multilayer films, the polyethylene-based composition of the present invention works well in outer layers of the film, such as sealant layers, due to its good heat-sealing properties, low bubble blocking, and / or low coefficient of friction. In some embodiments, the polyethylene-based composition of the present invention can be used in two or more layers of the film. Other layers within the multilayer film of the present invention can, in various embodiments, comprise a polymer selected from the following: the polyethylene-based composition of the present invention, LLDPE, VLDPE (very low density polyethylene), MDPE, LDPE, HDPE, HMWHDPE (high molecular weight HDPE), propylene-based polymers, polyethylene plastomers / elastomers, reinforced polyethylene, olefin block copolymers (OBC), ethylene vinyl acetate, ethylene acrylic acid, ethylene methacrylic acid, ethylene methyl acrylate, ethylene ethyl acrylate, ethylene butyl acrylate, isobutylene, maleic anhydride-grafted polyolefins, ionomers of any of the foregoing, or combinations thereof. In some embodiments, the multilayer film of the present invention has a layer comprising polyamide or ethylene vinyl alcohol. In some embodiments, the multilayer film of the present invention can comprise one or more tie layers known to those skilled in the art.

[0100] In some embodiments, the multilayer film has a coating on the outer surface. Generally, the coating can be any coating known to one of ordinary skill in the art based on the teachings herein, taking into account the desired use and properties of the multilayer film. In some embodiments, the coating comprises polyurethane. In various embodiments in which a coating is provided on the multilayer film, the coating can have a thickness of 25 micrometers or less, e.g., 20 micrometers or less, 15 micrometers or less, 10 micrometers or less, 5 micrometers or less, or even 3 micrometers or less. For example, the coating can have a thickness of 1 micrometer to 3 micrometers or 2 micrometers to 3 micrometers. According to additional embodiments, the coating can be applied to the multilayer film 110 at a weight of 1 gsm (grams per square meter) to 3 gsm, e.g., 1 gsm to 2 gsm or 2 gsm to 3 gsm, using techniques known to one of ordinary skill in the art based on the teachings herein.

[0101] In some embodiments, depending on, for example, the end use application, the multilayer film may be corona treated, plasma treated, or printed using techniques known to those skilled in the art. In some embodiments, the multilayer film may be surface coated with polyvinyl alcohol, or with aluminum, silicon oxide, aluminum oxide, or other metals known to those skilled in the art based on the teachings herein.

[0102] It should be understood that any of the foregoing layers may further comprise one or more additives known to those skilled in the art, such as, for example, antioxidants, UV stabilizers, heat stabilizers, lubricants, antiblocking agents, pigments or colorants, processing aids, crosslinking catalysts, flame retardants, fillers, and blowing agents. In some embodiments, the polyethylene-based composition comprises up to 3 weight percent of such additional additives. All individual values ​​and subranges from 0 to 3 weight percent are included and disclosed herein. For example, the total amount of additives in the polymer blend can be from a lower limit of 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, or 4.5 weight percent to an upper limit of 1, 2, 3, 4, or 5 weight percent.

[0103] By being polyethylene-based, the polyethylene-based compositions of the present invention can be incorporated into multilayer films and articles that are primarily, if not entirely, composed of polyolefins to provide more readily recyclable films and articles, according to some embodiments of the present invention. The polyethylene-based compositions of the present invention are particularly advantageous in providing films in which the film is formed primarily from polyolefins, such as polyethylene and / or polypropylene. For example, films comprising primarily polyethylene or polypropylene have improved recyclability profiles, in addition to other benefits that the use of such polymers may provide. In some embodiments, the film comprises 95 weight percent or more of polyethylene, based on the total weight of the film. In other embodiments, the film comprises 96 weight percent or more, 97 weight percent or more, 98 weight percent or more, or 99 weight percent or more of polyethylene, based on the total weight of the film.

[0104] The films of the present invention can be formed using techniques known to those skilled in the art based on the teachings herein. For example, the films can be prepared as blown films (e.g., water-quenched blown films) or cast films. For example, in the case of multilayer polyethylene films, for layers that can be coextruded, such layers can be coextruded as blown films or cast films using techniques known to those skilled in the art based on the teachings herein.

[0105] In some embodiments, the films of the present invention are stretched. In various embodiments, the films can be uniaxially stretched, biaxially stretched, or otherwise oriented using techniques known to those skilled in the art, such as those described in Briel, J., "Biaxial Oriented Film Technology," Film Processing Advances, Kanai et al. (editors) (2014). For example, in some embodiments, the films can be stretched using a blown film machine direction stretching process, a blown film biaxial stretching process, a double bubble stretching process, and other techniques known to those skilled in the art based on the teachings herein. One advantage of some embodiments of the present invention in which the polyethylene-based composition of the present invention is incorporated into a film that is stretched is that the composition of the present invention can reduce blocking in the stretched film.

[0106] In some embodiments in which the film is bilayer stretched, the polyethylene film is biaxially stretched using a tenter frame sequential biaxial stretching process. Such techniques are generally known to those skilled in the art. Generally, in a tenter frame sequential biaxial stretching process, a tenter frame is incorporated as part of a multilayer coextrusion line. After extrusion from a flat die, the film is cooled on a chill roll and immersed in a water bath filled with room temperature water. The cast film is then passed over a series of rollers with different rotation speeds to achieve stretching in the machine direction. The MD stretching segment of the production line has several pairs of rollers, all of which are oil heated. The pairs of rollers operate sequentially as preheating rollers, stretching rollers, and relaxation and annealing rollers. The temperature of each pair of rollers is controlled separately. After stretching in the machine direction, the film web passes through a tenter frame hot air oven with heating zones to achieve stretching in the transverse direction. The first several zones are for preheating, followed by a stretching zone and then a final zone for annealing.

[0107] In some embodiments, the polyethylene film may be stretched in the machine direction at a stretch ratio of 2:1 to 9:1, or alternatively at a stretch ratio of 2:1 to 6:1, or alternatively at a stretch ratio of 4:1 to 6:1. The polyethylene film may be stretched in the transverse direction at a stretch ratio of 2:1 to 11:1, or alternatively at a stretch ratio of 2:1 to 9:1, or alternatively at a stretch ratio of 6:1 to 9:1. In some embodiments, the polyethylene film is stretched in the machine direction at a stretch ratio of 2:1 to 9:1 and in the transverse direction at a stretch ratio of 2:1 to 11:1. The polyethylene film is stretched in the machine direction at a stretch ratio of 2:1 to 6:1 and in the transverse direction at a stretch ratio of 2:1 to 9:1, in some embodiments. In some embodiments, the polyethylene film is stretched in the machine direction at a stretch ratio of 4:1 to 6:1 and in the transverse direction at a stretch ratio of 6:1 to 9:1.

[0108] In some embodiments, after stretching, the biaxially stretched film has a thickness of 5 to 50 micrometers, hi some embodiments, the biaxially stretched film has a thickness of 15 to 40 micrometers.

[0109] In some embodiments, when a film is uniaxially stretched, the film is stretched only in the machine direction. Various processing parameters are contemplated as suitable for stretching in the machine direction, as would be known to one skilled in the art based on the teachings herein. For example, a uniaxially stretched multilayer film can be stretched in the machine direction at a stretch ratio greater than 1:1 and less than 8:1, or at a stretch ratio of 4:1 to 8:1.

[0110] In some embodiments, after stretching, the machine direction stretched film has a thickness of 5 to 50 micrometers, hi some embodiments, the machine direction stretched film has a thickness of 15 to 40 micrometers.

[0111] In some embodiments, depending on, for example, the end use application, the stretched polyethylene film may be corona treated, plasma treated, or printed using techniques known to those skilled in the art. In some embodiments, the stretched multilayer film may be surface coated with polyvinyl alcohol, or with aluminum, silicon oxide, aluminum oxide, or other metals known to those skilled in the art based on the teachings herein.

[0112] Laminate Embodiments of the present invention also include laminates incorporating films of the present invention comprising one or more of the polyethylene-based compositions of the present invention. In such embodiments, such films comprising the polyethylene-based compositions of the present invention are laminated to a second film. Generally, the second film can be any film known to those of skill in the art based on the teachings herein. The second film can be selected, for example, based on the properties of the first film comprising the polyethylene-based compositions of the present invention, the desired properties of the laminate, the intended use of the laminate, and other factors. In some embodiments, the second film also comprises a polyethylene-based composition of the present invention. In some embodiments, the first film and the second film have the same or substantially the same composition and structure.

[0113] In some embodiments, a laminate comprises a multilayer film having a sealant layer, the sealant layer comprising the polyethylene-based composition of the present invention, and the sealant layer is an outer layer of the laminate. In some embodiments, the sealant layer exhibits a coefficient of friction against metal of less than 0.50. In some such embodiments, the second film of the laminate is a sealant film, a biaxially oriented monolayer film, a biaxially oriented multilayer film, a machine direction oriented monolayer film, or a machine direction oriented second multilayer film. In some further embodiments, the second film comprises at least 95 wt. % of one or more polyethylenes, based on the total weight of the second film.

[0114] In some embodiments, the second film is a monolayer film, a multilayer film, an oriented monolayer film, a biaxially oriented multilayer film, or a machine direction oriented multilayer film. In some embodiments, the second film comprises at least 95% by weight of one or more polyethylenes, or in other embodiments at least 98% by weight of one or more polyethylenes, or in other embodiments at least 99% by weight of one or more polyethylenes, each based on the total weight of the second film.

[0115] In some embodiments, the second film is a sealant film. For example, the second film may be a polyethylene sealant film that is a monolayer or multilayer film substantially formed of polyethylene (e.g., containing more than 90 weight percent ethylene-based polymer, or more than 95 weight percent ethylene-based polymer, or more than 99 weight percent ethylene-based character) and that, when heated as part of a laminate structure, can seal the laminate to another film, another laminate, or itself. Based on the teachings herein, any polyethylene sealant film known to those skilled in the art can be used.

[0116] A wide variety of biaxially oriented multilayer films or uniaxially oriented films known to those of ordinary skill in the art can be used as the second film in various embodiments of the laminate based on the teachings herein and the desired properties of the laminate.

[0117] In some embodiments, the second film comprises polyethylene, polyethylene terephthalate, polypropylene, or polyamide. When the second film comprises polyethylene, polyethylene terephthalate, polypropylene, or polyamide, the entire film may be formed from polyethylene, polyethylene terephthalate, polypropylene, or polyamide, or the film may include at least one layer comprising polyethylene, polyethylene terephthalate, polypropylene, or polyamide. Those skilled in the art will be able to select a film comprising polyethylene, polyethylene terephthalate, polypropylene, or polyamide for use in such embodiments based on the teachings herein.

[0118] In some embodiments, the laminate of the present invention includes a third film (e.g., a triple laminate). In such embodiments, at least one outer layer of the laminate is a sealant layer comprising the polyethylene-based composition of the present invention. In various embodiments, the third film can be any of the first or second films disclosed herein. For example, in some embodiments, the laminate includes a machine-direction oriented polyethylene film as an outer film, a biaxially oriented polyethylene film as an inner film, and a multilayer polyethylene film as the other outer film, the multilayer film comprising the polyethylene-based composition of the present invention in its outer layer.

[0119] Laminates according to embodiments of the present invention can be formed using techniques known to those skilled in the art based on the teachings herein. For example, films of the present invention (including any of the inventive polyethylene-based compositions disclosed herein) can be laminated to other films using an adhesive. A variety of adhesive compositions are contemplated as suitable for use in laminates. These may include polyurethanes, epoxies, acrylics, and the like. In one embodiment, a laminate can include an adhesive layer comprising a polyurethane adhesive. The polyurethane adhesive can be solventless, water-based, or solvent-based. Additionally, the polyurethane adhesive can be a two-part formulation. The weight or thickness of the adhesive layer can vary depending on many factors, including, for example, the desired thickness of the multilayer structure, the type of adhesive used, and other factors. In some embodiments, the adhesive layer can have a viscosity of up to 5.0 grams / m². 2 , or 1.0 to 4.0 g / m 2 , or 2.0 to 3.0 g / m 2 It is applied with.

[0120] Laminates according to some embodiments of the present invention can also be formed by extrusion lamination.

[0121] Laminates according to some embodiments of the present invention have a coefficient of friction of the first film side against metal of less than 0.50.

[0122] Goods Embodiments of the present invention also relate to articles, such as packaging, formed from or incorporating one or more of the inventive films (or laminates incorporating such films). Such packaging can be formed from any of the inventive films or laminates described herein.

[0123] Examples of such articles include flexible packaging, pouches, stand-alone pouches, and pre-formed packages or pouches. In some embodiments, the oriented multilayer polyethylene films or laminates of the present invention can be used in food packaging. Examples of foods that can be included in such packaging include meat, cheese, cereal, nuts, juice, sauce, etc. Such packaging can be formed using techniques known to those skilled in the art based on the teachings herein and on the particular application of the packaging (e.g., type of food, amount of food, etc.).

[0124] Test Method Unless otherwise indicated herein, the following analytical methods are used in describing embodiments of the present invention.

[0125] Melt Index Melt index I2 (or I2) and I 10 (or I10) are measured according to ASTM D-1238 (Method B) at 190°C and 2.16 kg and 10 kg loads, respectively. Values ​​are reported in g / 10 min.

[0126] density Samples for density measurements are prepared according to ASTM D4703. Measurements were performed according to ASTM D792, Method B, within 1 hour of sample pressing.

[0127] Friction coefficient The coefficient of friction (COF) is measured in accordance with ASTM D1894. The test is performed using an Instron 5564 Universal Testing Machine. A 3" x 6" specimen of the film sample is cut. A Type B sled measuring 2.5" x 2.5" square and weighing 195g is used. The sample is wrapped snugly around the sled, with the machine direction (MD) aligned parallel to the direction of travel. This is aided by the use of double-sided tape pre-attached to the top surface of the sled. Ensure that the film surface being tested is wrinkle-free. A COF measurement fixture consisting of a rigid plate with a low-friction pulley is attached to the fixed base of the device. A metal plate is then placed on the rigid plate and used as the plane along which the sled is driven. When testing film-to-film COF, another piece of film measuring approximately 6" x 14" is attached to the metal plane with the surface of interest facing up and the long edge in the machine direction. The sled with the attached film specimen is then placed on the metal / sample-covered plane and attached to a nylon dragline, which passes around a pulley and is attached to the crosshead of the test frame. The crosshead is then driven at a rate of 6 inches / minute over a distance of 3 inches. The force at which the sample begins to move (the initial peak in the load-displacement data) is the static force (F S ) The average load calculated between the 0.5 inch and 3 inch travel is the dynamic force (F k ) Dynamic COF, μ K is the dynamic force (F K ) to the normal force (weight of the sled). Five replicates are performed for each sample and the average value is reported.

[0128] Blocking Force The blocking force is highly dependent on the thermal history of the film. Therefore, films are maintained at 25±2°C before measurement. 6-inch x 1-inch strips are punched from the collapsed bubble of the film with the longer dimension along the machine direction. The two layers are separated at one end. The layers are clamped in the grips of an Instron frame (initial grip separation = 1 inch) and pulled apart (180° peel) at a rate of 1 inch / minute. The test continues until an additional 4 inches of the layers are separated. A force-displacement curve is recorded during the test. The force initially increases rapidly and then reaches a plateau. The plateau force is a measure of the blocking force. The most frequent force value (Mode) in the plateau region is taken as the blocking force. At least five specimens are tested from each film sample. The highest and lowest measurements from the tested sample are discarded, and the average of the remaining measurements is reported.

[0129] GPC triple detector (measurement of Mw and Mn of PDMS) The weight average molecular weight (Mw) and number average molecular weight (Mn) of polydimethylsiloxanes are measured by GPC (Viscotek™ GPC Max) using triple detection capability. The Viscotek™ TDA305 unit is equipped with a differential refractometer, an online differential pressure viscometer, and low-angle light scattering (LALS: 7° and 90° detection angles). The mobile phase is toluene HPLC grade. The columns are two Varian PL Gel Mixed C columns (7.5 x 300 mm, 5 μm particle size) and one Varian PL Gel Guard column (7.5 x 300 mm), with a 5 fractom injection volume, a flow rate of 1 mL / min, and a run time of 37 min. The column and detector temperatures are 40°C. The software used is Omnisec 4.6.1 (Viscotek™).

[0130] The detector is calibrated by injecting a narrow polystyrene standard (Mw 68, 100 g / mol) of known concentration. Accurate run parameters are confirmed by using a narrow molecular weight distribution polystyrene standard (PS71K). The molecular weight average must be within the Statistical Process Control (SPC) chart to verify detector calibration. A dn / dc of 0.083 is used for triple detection calculations. Typical GPC 3 The precision and accuracy (depending on the refractive index increment) is about 2-3%.

[0131] Some embodiments of the present invention will now be described in detail in the following examples. [Example]

[0132] Examples 1 to 3 and Comparative Examples A to C Three inventive multilayer films and three comparative multilayer films were prepared using a LabTech 5-layer coextrusion blown film line. Each multilayer film was a two-layer film with an A / B structure. The blown film line was equipped with an annular die with a 75 mm diameter and a 2 mm die gap. The blow-up ratio (BUR) was 3.0:1. The output rate was 18.1 kg / h, and the specific rate was 76.9 kg / h / m of die. The bubbles had a nominal width of 353 mm and a nominal thickness of 50 μm. The melt temperature was 230-255°C. The outer surface of the bubble (the surface of layer A) was corona treated to achieve a surface energy of greater than 42 mN / m. For blocking force measurement, approximately 6 m of the bubble was first manually collected. The bubble was then torn and separated into 305 mm widths. Approximately 70 m of slit film was collected on a roll for subsequent lamination.

[0133] The multilayer film was laminated to 12 μm thick biaxially oriented polyethylene terephthalate (BOPET) on a Nordmeccanica Labo Combi laminator using MOR-FREE™ L75-197 / C-5 solvent-free adhesive. L75-197 and C-5 were mixed in a 100:80 ratio. Both the PE and PET surfaces were corona treated. The adhesive was applied using a gravure roll at a surface density of 0.9 to 1.2 lb / ream, followed by nipping at 55°C. The film was allowed to cure for at least 7 days at 25°C and 50% relative humidity.

[0134] The structures of Inventive Films 1-3 and Comparative Films A-C are shown in Table 1, with the amount of each layer component listed as a weight percent of the total weight of the layer.

[0135] [Table 1] DOWLEX™ 2045G is commercially available from The Dow Chemical Company and has a viscosity of 0.920 g / cm 3 and a melt index (I2) of 1.0 g / 10 min. DOW™ LDPE 611A is a linear low density polyethylene having a density of 0.924 g / cm3, commercially available from The Dow Chemical Company. 3 and a melt index (I2) of 0.88 g / 10 min. AFFINITY™ PL 1880G is a low density polyethylene having a density of 0.902 g / cm3, commercially available from The Dow Chemical Company. 3and a melt index (I2) of 1.0 g / 10 min. Erucamide and behenamide are commercially available from Croda International Plc as Crodamide™ ER and Crodamide™ BR, respectively. Talc is commercially available from IMIFABI as HTP1C. PDMS1 and PDMS2 are polydimethylsiloxanes commercially available from The Dow Chemical Company as XIAMETER™ PMX-200 Silicone Fluid 100 cst and XIAMETER™ PMX-200 Silicone Fluid 10 cst, respectively. The properties of PDMS1 and PDMS2 are listed in Table 2.

[0136] [Table 2]

[0137] Individual masterbatches of erucamide, behenamide, PDMS1, and PDMS2 were extruded into DOWLEX™ 2047G linear low-density polyethylene (density = 0.917 g / cm) at concentrations of 5–10 wt % using a twin-screw extruder. 3 and melt index (I2) = 2.3 g / 10 min). DOWLEX™ 2047G is commercially available from The Dow Chemical Company. It should be understood that for the sealant layer (Layer B), the amount of additive is specified in ppm by weight, with the remainder of the layer being AFFINITY™ PL 1880G. Additives are incorporated into AFFINITY™ PL 1880G by melt blending the desired additive masterbatch at the appropriate concentration.

[0138] The blocking force of each film is also measured as described above in the Test Methods section.

[0139] The inventive and comparative films differ only in the additive used in the sealant layer (Layer B). As described above in the Test Methods section, the sealant-to-metal coefficient of friction of the sealant layer is measured by measuring the coefficient of friction when the sealant layer of a fill sample (e.g., a first film sample of Inventive Film 1) is placed in contact with a metal surface. As described above in the Test Methods section, the sealant-to-sealant coefficient of friction of the sealant layer is assessed by measuring the coefficient of friction when the sealant layer of one film sample (e.g., a first film sample of Inventive Film 1) is placed in contact with the sealant layer of another film sample having the same composition (e.g., a second film sample of Inventive Film 1).

[0140] The coefficient of friction of the sealant layer after lamination is then measured as described in the Test Methods section above. The sealant-to-metal coefficient of friction of the sealant layer after lamination is measured by measuring the coefficient of friction when the sealant layer of a laminate sample (e.g., the first laminate sample of Inventive Film 1) is placed in contact with a metal surface. The sealant-to-sealant coefficient of friction of the sealant layer after lamination is evaluated by measuring the coefficient of friction when the sealant layer of one film sample (e.g., the first laminate sample of Inventive Film 1) is placed in contact with the sealant layer of another film sample having the same composition (e.g., the second laminate sample of Inventive Film 1).

[0141] The results are shown in Table 3.

[0142] [Table 3]

[0143] The inventive film and the comparative film each contain the same amount of talc (3200 ppm), but the other additives added to them are different. Therefore, the difference in performance is due to the other additives, and only the other additives will be described below. Inventive film 2 has 1500 ppm of M less than 2500 g / mol. n The film 1 of the present invention contains only 1500 ppm of PDMS. n Each film contains approximately 6000 g / mol of PDMS, along with 1500 ppm each of an unsaturated fatty acid amide (erucamide) and a linear saturated fatty acid amide (behenamide). Comparative Film A contains 2250 ppm each of erucamide and behenamide. Despite having the same total amount of additive as Inventive Film 1 (7700 ppm) and a substantially higher amount of additive than Inventive Film 2 (3000 ppm more), Comparative Film A exhibits higher blocking power than both Inventive films. Comparative Films B and C contain the same PDMS loading as Inventive Film 2. However, instead of using a combination of unsaturated and linear saturated fatty acid amides, Comparative Film B uses only one unsaturated fatty acid amide (erucamide) and Comparative Film C uses only one linear saturated fatty acid amide (behenamide). Note that, like PDMS, the total loading of amide in Comparative Films B and C is the same as Inventive Film 1. Despite having the same PDMS loading (1500 ppm) as inventive films 1 and 2 and the same or higher total amide content as inventive films 1 and 2, comparative films B and C exhibit higher blocking than inventive films 1 and 2.

[0144] It should be noted that while the difference in blocking force in Table 3 between some of the inventive and comparative films is not significant, if this is limited by bubble blocking, it translates into a significant difference in the maximum production rate possible during blown film production. Without wishing to be bound by any particular theory, it is believed that the reduced online blocking tendency of the inventive films may be related to the rapid migration of additives in the composition to the film surface, which prevents intimate contact between the film surfaces. If blocking force is measured at a time after extrusion (offline), a separate, slower-moving additive composition can also serve to reduce the measured blocking force even online, and the blocking tendency may be observed as significantly higher.

Claims

1. 1. A polyethylene-based composition comprising: (A) at least 95 wt. % of one or more polyethylenes, based on the total weight of the polyethylene-based composition; (B) 250 to 15,000 ppm, based on the total weight of the polyethylene-based composition, of a polydimethylsiloxane having a number average molecular weight (Mn) of 1,000 to 2,500 g / mol; Including, 0.865-0.915g / cm ３ Density of 0.5 to 25 g / 10 min and melt index Sex (I ２ ) A polyethylene-based composition.

2. 2. The polyethylene-based composition of claim 1, wherein the polydimethylsiloxane has a number average molecular weight (Mn) of 1,000 to 1,500 g / mol.

3. 3. The polyethylene-based composition according to claim 1 or claim 2, further comprising 250 to 2,500 ppm of erucamide and 250 to 2,500 ppm of behenamide, each based on the total weight of the polyethylene-based composition.

4. The polyethylene-based composition of any one of claims 1 to 3, further comprising up to 20,000 ppm, based on the total weight of the polyethylene-based composition, of an inorganic antiblocking agent.

5. 5. The polyethylene-based composition of any one of claims 1 to 4, further comprising up to 5,000 ppm of a fatty acid amide selected from the group consisting of stearamide, oleamide, palmitamide, isostearamide, ethylene-bis-oleamide, and ethylene-bis-stearamide, and combinations thereof.

6. 6. The polyethylene-based composition according to any one of claims 1 to 5, further comprising 250 to 15,000 ppm, based on the total weight of the polyethylene-based composition, of a polydimethylsiloxane having a number average molecular weight (Mn) greater than 40,000 g / mol.

7. The one or more polyethylenes have a viscosity of 0.885 to 0.910 g / cm ３ and a melt index (I ２ The polyethylene composition according to any one of claims 1 to 6, comprising a polyethylene having a copolymer of 2-methyl-2-propanol and 2-methyl-2-propanol.

8. A monolayer film comprising the polyethylene composition according to any one of claims 1 to 7.

9. 9. The monolayer film of claim 8, which exhibits a coefficient of friction against itself and against metal of less than 0.

40.

10. 10. A laminate comprising the monolayer film of claim 8 or claim 9, wherein the monolayer film side of the laminate exhibits a coefficient of friction against metal of less than 0.50.

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