Laminate with machine direction oriented multilayer film

Abstract

The present disclosure provides a laminate. In an embodiment, the laminate includes (1) a first machine direction oriented multilayer film (1MD0), (2) a second film, and (3) an adhesive layer between the 1MD0 and the second film. The 1MDO includes (a) a skin layer with (i) a skin layer (SL) first ethylene / a-olefin copolymer having a density from 0.940 g / cc to 0.980 g / cc and (ii) a skin layer (SL) second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc. The 1MDO includes (b) a first intermediate layer (FIL) in direct contact with the skin layer. The first intermediate layer includes an FIL ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc. The 1MDO includes (c) a core layer (CL) in direct contact with the first intermediate layer (b). The core layer (c) includes (i) a core layer (CL) first ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc, and (ii) a core layer (CL) second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc. The 1MD0 includes (d) a second intermediate layer (SIL) in direct contact with the core layer. The second intermediate layer includes an SIL ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc. The 1MDO includes (e) an interior layer (IL) in direct contact with the second intermediate layer. The interior layer includes (i) an interior layer (IL) first ethylene / a-olefin copolymer having a density from 0.940 g / cc to 0.980 g / cc, and (ii) an interior layer (IL) second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc.

Description

LAMINATE WITH MACHINE DIRECTION ORIENTED MULTILAYER FILMFIELD

[0001] The present disclosure relates to laminates, and more specifically, laminates comprising machine direction oriented multilayer films.BACKGROUND

[0002] Polyolefin films are widely used in flexible packaging, either as stand-alone packaging or in lamination film. In an effort to improve recyclability and expand sustainability, the flexible packaging market is moving toward mono-material solutions based on ethylenebased polymers (commonly referred to "polyethylenes"). As such, efforts continue to downgauge polyethylene films in search of thinner, tougher, stiffer, and lower cost solutions for flexible packaging while avoiding non-recyclable materials such as oriented polyethylene terephthalate (OPET), oriented polypropylene (OPP), and oriented polyamide (OPA).

[0003] Machine direction oriented (MDO) film is a known approach for fabricating polyethylene film as a printing substrate. MDO film significantly improves the film properties such as optics, tensile strength, stiffness, and moisture barrier when applied to polyethylene films.

[0004] However, when MDO-polyethylene ("MDO-PE") based laminates are used for (i) heavy duty bulk bags for holding 5 kg to 20 kg bulk material, (ii) stand-up spouted zipper pouches for holding greater than 3kg bulk material, and / or (iii) bulk liquid detergent pouches, the MDO-PE based laminates fail in bond strength. Density differences between the skin layer and the sub-skin layers of the MDO-PE create weak interfaces, leading to the peeling-off of the outer laminating layer from the MDO-PE, resulting in delamination problems.

[0005] The delamination problem is further aggravated when solventless adhesives are used. Solventless adhesives are hard and brittle in nature compared to solvent-based adhesives. Solvent-based adhesives are also problematic. MDO-PE film is more heat sensitive as compared to conventional polyethylene terephthalate (PET) or biaxially oriented polypropylene (BOPP) print film, so MDO-PE loses its dimensional stability (shrinkage / elongation) during solvent-based lamination process.

[0006] H ence a need exists for MDO-PE laminates that do not de-laminate, particularly for bulk flexible packaging applications (contents from 3 kg to 40 kg). A need further existsfor MDO-PE laminates that are compatible with solvent-less adhesive and do not de-laminate when used with solvent-less adhesive.SUMMARY

[0007] The present disclosure provides a laminate. In an embodiment, the laminate includes (1) a first machine direction oriented multilayer film (1MD0), (2) a second film, and (3) an adhesive layer between the 1MDO and the second film. The 1MD0 includes (a) a skin layer with (i) a skin layer (SL) first ethylene / a-olefin copolymer having a density from 0.940 g / cc to 0.980 g / cc and (ii) a skin layer (SL) second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc. The 1MDO includes (b) a first intermediate layer (FIL) in direct contact with the skin layer. The first intermediate layer includes an FIL ethylene / a- olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc. The 1MDO includes (c) a core layer (CL) in direct contact with the first intermediate layer (b). The core layer (c) includes (i) a core layer (CL) first ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc, and (ii) a core layer (CL) second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc. The 1MD0 includes (d) a second intermediate layer (SIL) in direct contact with the core layer. The second intermediate layer includes an SIL ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc. The 1MD0 includes (e) an interior layer (IL) in direct contact with the second intermediate layer. The interior layer includes (i) an interior layer (IL) first ethylene / a-olefin copolymer having a density from 0.940 g / cc to 0.980 g / cc, and (ii) an interior layer (IL) second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc.BRIEF DESCRIPTION OF THE DRAWINGS

[0008] FIG. 1 is a graph showing average bond strength performance for comparative samples and inventive examples.

[0009] FIG. 2 is a graph showing average seal strength performance for comparative samples and inventive examples.DEFINITIONS

[0010] Any reference to the Periodic Table of Elements is that as published by CRC Press,Inc., 1990-1991. Reference to a group of elements in this table is by the new notation for numbering groups.

[0011] For purposes of United States patent practice, the contents of any referenced patent, patent application or publication are incorporated by reference in their entirety (or its equivalent U.S. version is so incorporated by reference) especially with respect to the disclosure of definitions (to the extent not inconsistent with any definitions specifically provided in this disclosure).

[0012] The numerical ranges disclosed herein include all values from, and including, the lower and upper value. For ranges containing explicit values (e.g., from 1 or 2, or 3 to 5, or 6, or 7), any subrange between any two explicit values is included (e.g., the range 1-7 above includes subranges of from 1 to 2; from 2 to 6; from 5 to 7; from 3 to 7; from 5 to 6; etc.).

[0013] Unless stated to the contrary, implicit from the context, or customary in the art, all parts and precents are based on weight and all test methods are current as of the filing date of this disclosure.

[0014] The terms "blend" or "polymer blend," as used, refers to a mixture of two or more polymers. A blend may or may not be miscible (not phase separated at molecular level). A blend may or may not be phase separated. A blend may or may not contain one or more domain configurations, as determined from transmission electron spectroscopy, light scattering, x-ray scattering, and other methods known in the art. The blend may be affected by physically mixing the two or more polymers on the macro level (for example, melt blending resins or compounding), or the micro level (for example, simultaneous forming within the same reactor).

[0015] The term "composition" refers to a mixture of materials which comprise the composition, as well as reaction products and decomposition products formed from the materials of the composition.

[0016] The terms "comprising," "including," "having" and their derivatives, are not intended to exclude the presence of any additional component, step, or procedure, whether or not the same is specifically disclosed. In order to avoid any doubt, all compositions claimed through use of the term "comprising" may include any additional additive, adjuvant, or compound, whether polymeric or otherwise, unless stated to the contrary. In contrast, the term "consisting essentially of" excludes from the scope of any succeeding recitation any other component, step, or procedure, excepting those that are not essential to operability. The term"consisting of" excludes any component, step, or procedure not specifically delineated or listed. The term "or," unless stated otherwise, refers to the listed members individually as well as in any combination.

[0017] The term "direct contact," or "directly contacts," or "is in direct contact with," or similar terms refers to a layer configuration whereby a first layer is located immediately adjacent to a second layer and no intervening layers or no intervening structures are present between the first layer and the second layer.

[0018] "Polyethylene" or "ethylene-based polymer" is a polymer comprising a majority amount (greater than 50 mol %) of units which have been derived from ethylene monomer. This includes polyethylene homopolymers or copolymers (meaning units derived from two or more comonomers). Common forms of polyethylene known in the art include Low Density Polyethylene (LDPE); Linear Low Density Polyethylene (LLDPE); Ultra Low Density Polyethylene (ULDPE); single-site catalyzed, Linear Low Density Polyethylene, including both linear and substantially linear low density resins (m-LLDPE); ethylene-based plastomers (POP) and ethylene-based elastomers (POE); Medium Density Polyethylene (MDPE); and High Density Polyethylene (HDPE). The following descriptions may be helpful in understanding the differences between some of these different polyethylene resins.

[0019] The term "LDPE" may also be referred to as "high pressure ethylene polymer" or "highly branched polyethylene" and is defined to mean that the polymer is partly or entirely homo-polymerized or copolymerized in autoclave or tubular reactors at pressures above 14,500 psi (100 MPa) with the use of free-radical initiators, such as peroxides (see for example US 4,599,392, which is hereby incorporated by reference). LDPE resins typically have a density in the range from 0.916 g / cm3to 0.935 g / cm3.

[0020] The term "LLDPE" includes both resin made using the traditional Ziegler-Natta catalyst systems and chromium-based catalyst systems as well as single-site catalysts, including, but not limited to, substituted mono- or bis-cyclopentadienyl catalysts (typically referred to as metallocene), constrained geometry catalysts, pyridylamine catalysts, phosphinimine catalysts & polyvalent aryloxyether catalysts (typically referred to as bisphenyl phenoxy), and includes linear, substantially linear or heterogeneous polyethylene copolymers or homopolymers. LLDPEs contain less long chain branching than LDPEs and includes the substantially linear ethylene polymers which are further defined in U.S. Patent 5,272,236, U.S. Patent 5,278,272, U.S. Patent 5,582,923 and US Patent 5,733,155; the homogeneouslybranched linear ethylene polymer compositions such as those in U.S. Patent No. 3,645,992; the 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 US 3,914,342 or US 5,854,045). The LLDPEs can be made via gas-phase, solution-phase or slurry polymerization or any combination thereof, using any type of reactor or reactor configuration.

[0021] The term "MDPE" refers to polyethylenes having densities from 0.926 g / cm3to 0.935 g / cm3. "MDPE" is typically made using chromium or Ziegler-Natta catalysts or using single-site catalysts including, but not limited to, substituted mono- or bis-cyclopentadienyl catalysts (typically referred to as metallocene), constrained geometry catalysts, pyridylamine catalysts, phosphinimine catalysts & polyvalent aryloxyether catalysts (typically referred to as bisphenyl phenoxy), and typically have a molecular weight distribution ("MWD") greater than 2.5.

[0022] The term "HDPE" refers to polyethylenes having densities from 0.935 g / cm3and up to about 0.980 g / cm3, which are generally prepared with Ziegler-Natta catalysts, chrome catalysts or single-site catalysts including, but not limited to, substituted mono- or bis- cyclopentadienyl catalysts (typically referred to as metallocene), constrained geometry catalysts, pyridylamine catalysts, phosphinimine catalysts & polyvalent aryloxyether catalysts (typically referred to as bisphenyl phenoxy).

[0023] The term "ULDPE" refers to polyethylenes having densities of 0.855 to 0.912 g / cm3, which are generally prepared with Ziegler-Natta catalysts, chrome catalysts, or singlesite catalysts including, but not limited to, substituted mono- or bis-cyclopentadienyl catalysts (typically referred to as metallocene), constrained geometry catalysts, pyridylamine catalysts, phosphinimine catalysts & polyvalent aryloxyether catalysts (typically referred to as bisphenyl phenoxy). ULDPEs include, but are not limited to, polyethylene (ethylene-based) plastomers and polyethylene (ethylene-based) elastomers. Polyethylene (ethylene-based) elastomers plastomers generally have densities of 0.855 g / cm3to 0.912 g / cm3.

[0024] The term "ethylene monomer," or "ethylene," as used herein, refers to a chemical unit having two carbon atoms with a double bond therebetween, and each carbon bonded to two hydrogen atoms, wherein the chemical unit polymerizes with other such chemical units to form an ethylene-based polymer composition.

[0025] A "heteroatom" is an atom other than carbon or hydrogen. The heteroatom can bea non-carbon atom from Groups IV, V, VI and VII of the Periodic Table. Nonlimiting examples of heteroatoms include: F, N, O, P, B, S, and Si.

[0026] A "hydrocarbon" is a compound containing only hydrogen atoms and carbon atoms. A "hydrocarbonyl" (or "hydrocarbonyl group") is a hydrocarbon having a valence (typically univalent). A hydrocarbon can have a linear structure, a cyclic structure, or a branched structure.

[0027] A "laminate," as used herein, includes a first film structure, a second film structure, and an adhesive layer between the first film structure and the second film structure. The first film structure and / or the second film structure can be a monolayer film or a multilayer film.

[0028] A "machine direction oriented film" or "MDO film" is a film stretched (or oriented) in the machine direction at a draw ratio from 4:1 to 12:1. The MDO film is a uniaxially oriented film. The stretching or orienting of the film is performed by way of machine direction orientation rolls, via tentering, or via intermeshing gears whereby the film is ring rolled, or otherwise incrementally stretched in the machine direction and below the melting point of the film.

[0029] A "multilayer structure" is a structure having more than one layer. For example, the multilayer structure may have two, three, four, five or more layers. A multilayer structure may be described as having the layers designated with letters. For example, a three layer structure having a core layer B, and two external layers A and C may be designated as A / B / C.

[0030] An "olefin" is an unsaturated, aliphatic hydrocarbon having a carbon-carbon double bond.

[0031] An "olefin-based polymer" (interchangeably referred to as "polyolefin") is a polymer that contains a majority weight percent of polymerized olefin monomer (based on the total amount of polymerizable monomers), and optionally, may contain at least one comonomer. Nonlimiting examples of olefin-based polymer include ethylene-based polymer and propylene- based polymer.

[0032] The term "polymer" or a "polymeric material," as used herein, refers to a compound prepared by polymerizing monomers, whether of the same or a different type, that in polymerized form provide the multiple and / or repeating "units" or "mer units" that make up a polymer. The generic term polymer thus embraces the term homopolymer, usually employed to refer to polymers prepared from only one type of monomer, and the term copolymer, usuallyemployed to refer to polymers prepared from at least two types of monomers. It also embraces all forms of copolymer, e.g., random, block, etc. The terms "ethylene / a-olefin polymer" and "propylene / a-olefin polymer" are indicative of copolymer as described above prepared from polymerizing ethylene or propylene respectively and one or more additional, polymerizable a- olefin monomer. It is noted that although a polymer is often referred to as being "made of" one or more specified monomers, "based on" a specified monomer or monomer type, "containing" a specified monomer content, or the like, in this context the term "monomer" is understood to be referring to the polymerized remnant of the specified monomer and not to the unpolymerized species. In general, polymers herein are referred to as being based on "units" that are the polymerized form of a corresponding monomer.

[0033] A "propylene-based polymer" (interchangeably referred to as "polypropylene") is a polymer that contains more than 50 mole percent polymerized propylene monomer (based on the total amount of polymerizable monomers) and, optionally, may contain at least one comonomer. Propylene-based polymer includes propylene homopolymer, and propylene copolymer (meaning units derived from propylene and one or more comonomers). The terms "propylene-based polymer" and "polypropylene" may be used interchangeably. A nonlimiting example of a propylene-based polymer (polypropylene) is a propylene / a-olefin copolymer with at least one C2 or C4-C10 a-olefin comonomer.DETAILED DESCRIPTION

[0034] The present disclosure provides a laminate. In an embodiment, the laminate includes (1) a first machine direction-oriented multilayer film (1MD0), (2) a second film, and (3) an adhesive layer between the 1MDO and the second film. The 1MDO includes (a) a skin layer ("SL"), (b) a first intermediate layer ("FIL"), (c) a core layer ("CL"), (d) a second intermediate layer ("SIL"), and (e) an interior layer ("IL"). The skin layer (a) includes (i) an SL first ethylene / a-olefin copolymer having a density from 0.940 g / cc to 0.980 g / cc and (ii) an SL second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc. The first intermediate layer (b) is in direct contact with the skin layer (a), and the first intermediate layer (b) includes an FIL ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc. The core layer (c) is in direct contact with the first intermediate layer (b). The core layer (c) includes (i) a CL first ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc, and a CL second ethylene / a-olefin copolymer having a density from 0.900g / cc to 0.940 g / cc. The second intermediate layer (d) is in direct contact with the core layer (c). The second intermediate layer (SIL) includes an SIL ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc. The interior layer (e) is in direct contact with the second intermediate layer (d). The interior layer (IL) includes (i) an IL first ethylene / a-olefin copolymer having a density from 0.940 g / cc to 0.980 g / cc and (ii) an IL second ethylene / a- olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc.

[0035] Although the 1MD0 film is oriented in the machine direction, it is understood the 1MD0 film could be further oriented in the transverse (or cross) direction and be a bi-axially oriented film.

[0036] Each of the following terms and respective abbreviations are used interchangeably: skin layer (or SL), first intermediate layer (or FIL), core layer (or CL), second intermediate layer (or SIL), and interior layer (or IL). Each ethylene-based polymer (and / or each ethylene / a-olefin copolymer) is a hydrocarbon. The ethylene-based polymers disclosed herein are identified by location, namely, identified by the film layer in which the ethylene-based polymer resides. It is understood that an ethylene-based polymer present in a first layer (i.e., present in the skin layer or SL) may or may not be the same ethylene-based polymer that is present in a second layer (i.e., present in the core layer or CL). The term "different than" as it relates to ethylene-based polymers (or ethylene / a-olefin copolymers) indicates that an ethylene-based polymer has at least one property or property value dissimilar to the corresponding property in another ethylene-based polymer. Nonlimiting examples of ethylene-based polymer (or ethylene / a- olefin copolymer) properties include comonomer type, comonomer amount, density, melt index, and / or melt temperature. By way of example, a first ethylene / a-olefin copolymer that is "different than" a second ethylene / a-olefin copolymer may have a density value that is dissimilar to the density value of the second ethylene / a-olefin copolymer.

[0037] In an embodiment, the comonomer for ethylene / a-olefin copolymer is a C3-C12 a- olefin, or a C4-C10 a-olefin, or a C4-C8 a-olefin. In a further embodiment, the comonomer is butene, hexene, or octene.1. First MDO Multilayer Film (1MDO)

[0038] The laminate includes the 1MD0 comprising the skin layer (a). The skin layer (a) is an outermost layer for the laminate. The skin layer (a) can be a seal layer. The skin layer (a) comprises (i) the SL first ethylene / a-olefin copolymer and (ii) the SL second ethylene / a-olefin copolymer, and (iii) optional additives. The SL first ethylene / a-olefin copolymer has a densityfrom 0.940 g / cc to 0.980 g / cc, or from 0.950 g / cc to 0.970 g / cc. The SL first ethylene / a-olefin copolymer can have a melt index from 0.5 g / 10 min to 1.5 g / 10 min, or from 1.0 g / 10 min to 1.5 g / 10 min and a melt temperature from 125°C to 135°C, or from 130°C to 135°C. The SL second ethylene / a-olefin copolymer is different than the SL first ethylene / a-olefin copolymer. The SL second ethylene / a-olefin copolymer has a density from 0.900 g / cc to 0.940 g / cc, or from 0.900 g / cc to less than 0.940 g / cc, or from 0.900 g / cc to 0.930 g / cc, or from 0.910 g / cc to 0.920 g / cc, a melt index from 0.5 g / 10 min to 1.5 g / 10 min, or from 1.0 g / 10 min to 1.5 g / 10 min and a melt temperature from 100°C to 130°C, or from 115°C to 125°C, or from 120°C to 125°C. In an embodiment, the skin layer (a) comprises from 80 wt% to 95 wt%, or from 85 wt% to 90 wt% of the SL first ethylene / a-olefin copolymer and from 20 wt% to 5 wt%, or from 15 wt% to 10 wt% of the SL second ethylene / a-olefin copolymer. Weight percent is based on total weight of the skin layer (a). It is understood weight percent amounts to 100 weight percent for skin layer (a). With respect to film layer weight percent, it is further understood weight percent amounts to 100 weight percent for each forthcoming layer disclosed herein.

[0039] The laminate includes the 1MDO multilayer film comprising the first intermediate layer (b). The first intermediate layer (b) is in direct contact with the skin layer (a). The first intermediate layer (b) comprises the FIL ethylene / a-olefin copolymer and optional additives. The FIL ethylene / a-olefin copolymer has a density from 0.920 g / cc to 0.980 g / cc, or from 0.940 g / cc to 0.980 g / cc, or from 0.940 g / cc to 0.950 g / cc. The FIL ethylene / a-olefin copolymer can have a melt index from 0.5 g / 10 min to 1.5 g / 10 min, or from 0.5 g / 10 min to 1.0 g / 10 min and a melt temperature from 110°C to 135°C, or from 125°C to 135°C, or from 125°C to 130°C. In an embodiment, the first intermediate layer comprises 100 wt% of the FIL ethylene / a-olefin copolymer. Weight percent is based on total weight of the first intermediate layer (b).

[0040] The laminate includes the 1MD0 multilayer film comprising the core layer (c). The core layer (c) is in direct contact with the first intermediate layer (b). The core layer (c) comprises (i) the CL first ethylene / a-olefin copolymer, (ii) the CL second ethylene / a-olefin copolymer, and (iii) optional additives. The CL first ethylene / a-olefin copolymer has a density from 0.920 g / cc to 0.980 g / cc, or from 0.940 g / cc to 0.980 g / cc, or from 0.940 g / cc to 0.950 g / cc. The CL first ethylene / a-olefin copolymer can have a melt index from 0.5 g / 10 min to 1.5 g / 10 min, or from 0.5 g / 10 min to 1.0 g / 10 min, and a melt temperature from 110°C to 135°C, or from125°C to 135°C, or from 125°C to 130°C. The CL second ethylene / a-olefin copolymer is different than the CL first ethylene / a-olefin copolymer. The CL second ethylene / a-olefin copolymer has a density from 0.900 g / cc to 0.940 g / cc, or from 0.900 g / cc to 0.930 g / cc, or from 0.910 g / cc to 0.920 g / cc, and can have a melt index from 0.5 g / 10 min to 1.5 g / 10 min, or from 1.0 g / 10 min to 1.5 g / 10 min, and a melt temperature from 100°C to 130°C, or from 100°C to 125°C, or from 120°C to 130°C , or from 120°C to 125°C. In an embodiment, the core layer (c) comprises from 60 wt% to 80 wt%, or from 65 wt% to 75 wt%, of the CL first ethylene / a-olefin copolymer and from 40 wt% to 20 wt%, or from 35 wt% to 25 wt% of the CL second ethylene / a-olefin copolymer. Weight percent is based on total weight of the core layer (c).

[0041] The laminate includes the 1MD0 multilayer film comprising the second intermediate layer (d ). The second intermediate layer (d) is in direct contact with the core layer (c). The second intermediate layer (d) comprises the SIL ethylene / a-olefin copolymer and optional additives. The SIL ethylene / a-olefin copolymer has a density from 0.920 g / cc to 0.980 g / cc, or from 0.940 g / cc to 0.980 g / cc, or from 0.940 g / cc to 0.950 g / cc. The SIL ethylene / a-olefin copolymer can have a melt index from 0.5 g / 10 min to 1.5 g / 10 min, orfrom 0.5 g / 10 min to 1.0 g / 10 min and a melt temperature from 110°C to 135°C, or from 125°C to 135°C, or from 125°C to 130°C. In an embodiment, the second intermediate layer comprises 100 wt% of the SIL ethylene / a-olefin copolymer. Weight percent is based on total weight of the second intermediate layer (d). In a further embodiment, the composition and structure ( / .e., layer volume) of the second intermediate layer (d) is identical to the composition and structure of the first intermediate layer (b).

[0042] The laminate includes the 1MDO multilayer film comprising the interior layer (e). The interior layer (e) is the interface with the adhesive layer. The interior layer (e) includes (i) the IL first ethylene / a-olefin copolymer, (ii) the IL second ethylene / a-olefin copolymer, and (iii) optional additives. The IL first ethylene / a-olefin copolymer has a density from 0.940 g / cc to 0.980 g / cc, or from 0.950 g / cc to 0.970 g / cc. The IL first ethylene / a-olefin copolymer can have a melt index from 0.5 g / 10 min to 1.5 g / 10 min, or from 1.0 g / 10 min to 1.5 g / 10 min, and a melt temperature from 125°C to 135°C, or from 130°C to 135°C. The IL second ethylene / a-olefin copolymer is different than the IL first ethylene / a-olefin copolymer. The IL second ethylene / a-olefin copolymer has a density from 0.900 g / cc to 0.940 g / cc, or from 0.900 g / cc to less than 0.940 g / cc, or from 0.900 g / cc to 0.930 g / cc, or from 0.910 g / cc to0.920 g / cc, a melt index from 0.5 g / 10 min to 1.5 g / 10 min, or from 1.0 g / 10 min to 1.5 g / 10 min, and a melt temperature from 100°C to 130°C, or from 100°C to 125°C, or from 115°C to 125°C, or from 120°C to 125°C. In an embodiment, the interior layer (e) comprises from 80 wt% to 95 wt%, or from 85 wt% to 90 wt% of the IL first ethylene / a-olefin copolymer and from 20 wt% to 5 wt%, or from 15 wt% to 10 wt% of the IL second ethylene / a-olefin copolymer. Weight percent is based on total weight of the interior layer (e). In a further embodiment, the composition and structure ( / .e., layer volume) of the interior layer (e) is identical to the composition and structure of the skin layer (a).

[0043] The 1MD0 multilayer film includes the skin layer (a) which is an outermost layerfor the laminate and can be a seal layer. The intermediate layer (b) is in-between and in direct contact with the skin layer (a) and the core layer (c). The core layer (c) is in-between and in direct contact with the first intermediate layer (b) and the second intermediate layer (d). The second intermediate layer (d) is in-between and in direct contact with the core layer (c) and the interior layer (e). Interior layer (e) is an outermost layer for the MDO multilayer film and is the interface with the adhesive layer. The MD01 multilayer film has a thickness from 10 microns to 50 microns, or from 15 micron to 40 microns, or from 20 microns to 30 microns, or 25 microns. Each layer in the 1MD0 multilayer film can comprise solely, or consist of solely, one or more ethylenebased polymers (and optional additives). In an embodiment, the 1MD0 multilayer film comprises at least 95 wt%, or at least 97 wt%, or at least 99 wt% ethylene-based polymers, based on the total weight of the 1MDO multilayer film. In a further embodiment, the 1MD0 multilayer film consists of, or consists essentially of, ethylene-based polymers (and optional additives).2. Second Film

[0044] The laminate includes a second film. The second film can be a monolayer film or a multilayer film and can be a non-oriented film or can be a machine direction oriented film. When the second film is a multilayer film, the second film can have two, or three, or four, or five, or six, or seven, or eight, or nine, or more layers.

[0045] In an embodiment, the second film is a multilayer film and includes an outermost layer (interchangeably referred to as "ol"), an outer middle layer (interchangeably referred to as "om") in direct contact with the outer layer (ol), a middle layer (interchangeably referred to as "ml") in direct contact with the outer middle layer (om), an inner middle layer (interchangeably referred to as "im") in direct contact with the middle layer (ml), and an innerlayer (interchangeably referred to as "in") in direct contact with the inner middle layer (im). The second film has a layer configuration ol / om / ml / im / in. Each layer in the second film can comprise solely, or consist solely of, one or more ethylene-based polymers (and optional additives).

[0046] In an embodiment, the second film is a multilayer film and comprises an outermost layer (ol), a middle layer (ml) in direct contact with the outermost layer (ol), and an inner layer (in) in direct contact with the middle layer (ml). The outermost layer (ol) comprises (i) an ol first ethylene / a-olefin copolymer, (ii) an ol second ethylene / a-olefin copolymer, and (iii) optional additives. The ol first ethylene / a-olefin copolymer has a density from 0.900 g / cc to 0.930 g / cc, or from 0.910 g / cc to 0.920 g / cc, a melt index from 0.5 g / 10 min to 1.5 g / 10 min, or from 1.0 g / 10 min to 1.5 g / 10 min and a melt temperature from 115°C to 125°C, or from 120°C to 125°C. The ol second ethylene / a-olefin copolymer is different than the ol first ethylene / a-olefin copolymer. The ol second ethylene / a-olefin copolymer has a density from 0.920 g / cc to 0.930 g / cc, or from 0.920 g / cc to 0.925 g / cc, a melt index from 0.5 g / 10 min to 1.0 g / 10 min, or from 0.65 g / 10 min to 0.85 g / 10 min, and a melt temperature from 160°C to 195°C. In an embodiment, the ol layer comprises from 70 wt% to 90 wt%, or from 75 wt% to 85 wt%, of the ol first ethylene / a-olefin copolymer and from 30 wt% to 10 wt%, or from 25 wt% to 15 wt% of the ol second ethylene / a-olefin copolymer. Weight percent is based on total weight of the ol layer.

[0047] The second film includes the middle layer (ml) in direct contact with the outermost layer (ol). The middle layer (ml) comprises (i) an ml ethylene / a-olefin copolymer and (ii) optional additives. The ml ethylene / a-olefin copolymer has a density from 0.910 g / cc to 0.920 g / cc, or from 0.916g / cc to 0.920 g / cc, a melt index from 0.5 g / 10 min to 1.0 g / 10 min or from 0.70 g / 10 min to 1.0 g / 10 min, and a melt temperature from 120°C to 130°C, or from 120°C to 125°C.

[0048] The second film includes the inner layer (in) in direct contact with the middle layer (ml). The inner layer (in) comprises (i) an in first ethylene / a-olefin copolymer, (ii) an in second ethylene / a-olefin copolymer, (iii) an in third ethylene / a-olefin copolymer, and (iv) optional additives. The in first ethylene / a-olefin copolymer has a density from 0.900 g / cc to 0.910 g / cc, or from 0.906 g / cc to 0.910 g / cc, a melt index from 0.5 g / 10 min to 1.0 g / 10 min, or from 0.6 g / 10 min to 1.0 g / 10 min, and a melt temperature from 100°C to 110°C, or from 105°C to 110°C. The in second ethylene / a-olefin copolymer has a density from 0.900 g / cc to0.930 g / cc, or from 0.910 g / cc to 0.920 g / cc, a melt index from 0.5 g / 10 min to 1.5 g / 10 min, or from 1.0 g / 10 min to 1.5 g / 10 min, and a melt temperature from 120°C to 130°C, or from 120°C to 125°C. The in third ethylene / a-olefin copolymer has a density from 0.920 g / cc to 0.930 g / cc, or from 0.920 g / cc to 0.925 g / cc, a melt index from 0.5 g / 10 min to 1.0 g / 10 min, or from 0.65 g / 10 min to 0.85 g / 10 min, and a melt temperature from 160°C to 195°C. In an embodiment, the in layer comprises from 30 wt% to 50 wt%, or from 35 wt% to 45 wt%, of the in first ethylene / a-olefin copolymer, from 40 wt% to 60 wt%, or from 45 wt% to 55 wt% of the in second ethylene / a-olefin copolymer and from 5 wt% to 15 wt%, of the in third ethylene / a-olefin copolymer, amounting to 100 wt% of the in layer. Weight percent is based on total weight of the in layer.

[0049] In an embodiment, the second film comprises at least 95 wt%, or at least 97 wt%, or at least 99 wt% ethylene-based polymers, based on the total weight of the second film. In an embodiment, the second film consists of, or consists essentially of, ethylene-based polymers (and optional additives). The second film has a thickness from 100 microns to 500 microns, or from 100 microns to 200 microns, or from 100 microns to 150 microns, or from 110 microns to 140 microns.3. Additives

[0050] Each layer in the 1MD0 multilayer film and / or in the second film may include one or more optional additives. Nonlimiting examples of suitable additive include antioxidants, such as IRGANOX 1010 and IRGAFOS 168 (commercially available from BASF), ultraviolet light absorbers, antistatic agents, pigments, dyes, nucleating agents, fillers, slip agents, fire retardants, plasticizers, polymer processing aids (PPA), lubricants, stabilizers, smoke inhibitors, viscosity control agents, surface modification agents, and anti-blocking agents. When present, the additive(s) amount(s) to greater than 0 wt% to 5 wt%, or from 0.01 wt% to 4 wt%, or from 0.05 wt% to 3 wt%, or from 0.01 wt% to 1.0 wt%, or from 0.05 wt% to 1.0 wt% of the MDO multilayer film (or of the second film). Weight % is based on total weight of the respective film layer containing the additive(s).3. Adhesive Layer

[0051] The laminate includes an adhesive layer. The adhesive layer is in-between the interior layer (e) of the 1MD0 multilayer film and the outermost layer (ol) of the second film such that the adhesive layer is in direct contact with the interior layer (e) and is in direct contact with the outermost layer (ol). The adhesive layer bonds, or otherwise adheres, the 1MD0 film to thesecond film. Nonlimiting examples of suitable adhesive material for the adhesive layer include solvent-based adhesives, solvent-less adhesives, aqueous adhesives, polyurethane, epoxy, acrylic, extruded polyethylene or the like. In an embodiment, the laminate includes an adhesive layer composed of a polyurethane adhesive. The polyurethane adhesive may be solventfree, waterborne or soivent-based. Furthermore, the polyurethane adhesive may be a one part formulation or a two part formulation. The two parts of the adhesive formulation crosslink, or otherwise bond, the 1MD0 multilayer film with second film. The adhesive layer has a coating weight from 1 gram per square meter (gsm) to 5 gsm.

[0052] The term "heat seal conditions," as used herein, is the provision of arranging two separate laminates such that two skin layers (a) are opposed to each other and are in contact with each other (hereafter interchangeably referred to as "a first skin layer (a) in contact with a second skin layer (a)"). The two laminates are placed between opposing heat seal bars, the heat seal bars are moved toward each other, sandwiching the two laminates, to apply heat and pressure to the two laminates such that the opposing skin layers (a) contact, melt, and form a heat seal, or weld, attaching the two laminates together. Heat sealing includes suitable structure and mechanism to move the seal bars toward and away from each other in order to perform the heat sealing procedure. The heat seal conditions further include applying a pressure of 2.5 Kg / cm2("seal pressure") on the two laminates for 0.5 to 1.0 seconds dwell time ("dwell") at temperatures ranging from 85°C to 150°C with 5°C increments ("seal temperature") in accordance with ASTM F88. Heat seal strength (or seal strength) is reported as average peak load (in Kg / 25mm) for each respective temperature.

[0053] The present disclosure provides a laminate to integrate an "all-polyethylene" substrate (all-polyethylene 1MD0 and all-polyethylene second film) as a substitute for conventional multi-material laminates such as polyethylene terephthalate (PET) / polyethylene laminates.

[0054] Applicant discovered that the provision of 5-20 wt% of the SK second ethylene / a-olefin copolymer in the skin layer and / or the provision of 5-20 wt% IL second ethylene / a-olefin copolymer in the interior layer unexpectedly reduces, or eliminates, delamination of the skin layer from the first interior layer (and / or delamination of the interior layer from the second interior layer). The present laminate exhibits improved bond strength performance without any skin layer delamination and / or without any interior layer delamination. The present laminate is suitable for applications ranging from compact sachetsto large bulk pouches for containing from 3 kg to 40 kg, or from 10 kg to 40 kg material content.TEST METHODS

[0055] Bond strength was measured in accordance with ASTM F88. Results were reported in g / 15 mm.

[0056] Density was measured in accordance with ASTM D792, Method B. Results were reported in grams per cubic centimeter (g / cc or g / cm3).

[0057] Seal Strength was measured in accordance with ASTM F88. Two separate laminate structures were arranged such that two skin layers (a) were opposed to each other and were in contact with each other. The two laminates were placed between opposing heat seal bars, the heat seal bars were moved toward each other, sandwiching the two laminates, to apply heat (150°C) and pressure (2.5 kg pressure) for one second such that the opposing skin layers (a) contact, melt, and form a heat seal, attaching the two laminates together. Heat seal strength (or seal strength) results were reported in kg / 15mm.

[0058] Melt index (I2 or Ml) was measured in accordance with ASTM D-1238 at 190°C at 2.16 kg. The values are reported in g / 10 min, which corresponds to grams eluted per 10 minutes.

[0059] Melt temperature. The differential scanning calorimetry (DSC) measurements were performed on a Differential Scanning Calorimeter. The samples (~3 mg) were loaded into aluminum calorimetry pans and heated from -40 °C to 150 °C at a heating rate of 10 °C / min under Nitrogen atmosphere. Samples were exposed to one full heating and cooling cycle to remove any thermal history before measurement.

[0060] By way of example, and not limitation, examples of the present disclosure are provided.EXAMPLES

[0061] The materials used in comparatives samples (CS) and inventive examples (IE) are provided in Table 1.Table 1 - MaterialsFabrication of films1. 1MD0 multilayer film (print film)

[0062] For the production of the MDO films, a Windmoller & Holscher 5 Layer blown coextrusion device created unblocked multilayer film with layer configuration and layer ratio 1 / 2 / 4 / 2 / 1 as shown in Tables 2A, 2B, and 2C below.

[0063] Table 2A ("PM") unblocked film, layer configuration SL / FIL / CL / SIL / ILWeight percent based on total weight for each respective layer

[0064] Table 2B ("PM-1") unblocked film, layer configuration SL / FIL / CL / SIL / ILWeight percent based on total weight for each respective layer

[0065] Table 2C ("PM-2") unblocked film, layer configuration SL / FIL / CL / SIL / ILWeight percent based on total weight for each respective layer

[0066] The original thickness of each primary multilayer film 2A, 2B, and 2C was 125 microns. Each primary film was stretched in a MDO unit roller, preheating temperature from 105°C to 110°C, stretching temperature from 110°C to 120°C, annealing temperature from 105°C to 120°C, cooling roll temperature from 80°C to 85°C and 40°C-45°C at a draw ratio of 6.5:1 to produce MDO multilayerfilm with a final thickness of 25 microns (2MD0).2. Second film - Heat sealable films

[0067] Two multilayer films, each with layer configuration ol / ml / in and 1 / 2 / 1 layer ratio were created on a Windmoller & Holscher coextrusion device. The two heat sealable films are designated "heat sealable film 1 (HS-1)" and "heat sealable film 2 (HS-2)" as shown in Table 3 below.Table 3Wt% - based on total weight for each respective layer3. Fabrication of laminate

[0068] Laminates were prepared with solvent-free (SF) and solvent-based (SB) lamination process using SF adhesive MORFREE™ 899A / C99, SB adhesive -ADCOTE™ 545EA / COREACTANT F Adhesive by using K Bar coated and hot roll laminator.

[0069] Heat sealable films HS-1 and HS-2 in Table 3 were laminated to the MDO films in Tables 2A, 2B, and 2C using a K-Bar coater & hot roll laminator. The adhesive used was solvent less MORFREE™ 899A / C99 or PacAcel™ 968 / C108.

[0070] 12 micron thick polyethylene terephthalate ("PET") films laminated to HS-1 andHS-2 using SB ADCOTE 545S+Cat-F and were used as comparative samples.

[0071] Table 4 (below) shows the laminate structure, the amount of adhesive used (in grams per square meter ("GSM")), bond strength (in g / 15mm) and seal strength (kg / 15 mm) for each laminate structure.

[0072] Table 4 - Laminate structures and propertiesIn FIGS. 1-2, "CEX" refers to "CS" and "IEX" refers to "IE" in Table 4.

[0073] With the same adhesive layer, changing to the inventive 1MD0 multilayer film increases the bond strength of the laminate. IE-1, IE-2, IE-5, IE-6 with PM-l as the 1MD0 multilayer film are effective. IE-3, IE-4, IE-7, IE-8 with PM-2 as the 1MD0 film are effective.

[0074] Laminate with PM as multilayer film and with PacAcel 1209A / B adhesive layer shows average bond strength 180 g / 15 mm and 190 g / 15mm for respective CS5 and CS6.

[0075] Laminate with PM-l as 1MDO multilayer film and with PacAcel 1209A / B adhesive layer exhibits an increase in average bond strength- 404 g / 15 mm and 448 g / 15mm for respective IE2 and IE6.

[0076] Laminate with PM-2 as 1MDO multilayer film and with PacAcel 1209A / B adhesive layer exhibits an increase in average bond strength -450 g / 15 mm and 458 g / 15mm for respective IE4 and IE8.

[0077] Laminate with PM-l as 1MD0 multilayer film and with MORFREE 899 / C99 adhesive layer shows an increase in average bond strength - compare average bond strengths 310 g / 15 mm and 340 g / 15mm for respective IE1 and IE5 to 115 g / 15mm and 133g / 15mm for respective CS3 and CS4.

[0078] Laminate with PM-l as 1MD0 multilayer film and with MORFREE 899 / C99 adhesive layer shows an increase in average bond strength - compare 310 g / 15 mm and 340 g / 15mm for respective IE1 and IE5 to 115g / 15 mm and 133g / 15mm for respective CS3 and CS4.

[0079] Laminate with PM-2 as 1MDO multilayer film and with MORFREE 899 / C99 adhesive layer shows an increase in average bond strength - see 432 g / 15 mm and 420 g / 15mm for respective IE3 and IE7.

[0080] All things being equal, laminates with PacAcel 1209A / B as adhesive layer yields greater bond strength compared to laminates with MORFREE 899A / C99 as adhesive layer.

[0081] All things being equivalent, laminates with 140 micron HS-2 as second film have heat seal strength that is greater than laminates with 110 micron HS-1 as second film.

[0082] Comparative samples made with MORFREE 899A / C99 adhesive layer (CS3, CS4) showed the lowest bond strength (115 g / 15mm and 133 gm / 15mm respectively). Interlayer separation at the seal area was also observed in CS3 and CS4.

[0083] Laminate structures with PM-l and PM-2 as 1MD0 multilayer film (with 90-85% ELITE AT6900 and 10-15% ELITE™5400G in skin layers), showed improvement in bond strength compared to the same laminate structures with PM as multilayer film (100% ELITEAT6900 in skin layer).

[0084] Laminate structures with PM-1 or PM-2 for 1MD0 multilayer film, PacAcel 1209A / B as adhesive layer and HS-2 (140 micron) for second film exhibit the greatest bond strength (greater than 400g / 15mm) compared to CS1-CS6 having bond strength of 115-133 g / 15 mm.

[0085] Laminate structures with PM-2 as 1MD0 multilayer film, PacAcel 1209A / B as adhesive layer, and HS-2 (140 micron) as second film (IE4 and IE8) exhibited high bond strength (450 g / 15 mm and 458 g / 15mm respectively).

[0086] It is specifically intended that the present disclosure not be limited to the embodiments and illustrations contained herein, but include modified forms of those embodiments including portions of the embodiments and combinations of elements of different embodiments as come within the scope of the following claims.

Claims

CLAIMS1. A laminate comprising:(1) a first machine direction oriented multilayer film (1MD0) comprising:(a) a skin layer comprising(i) a skin layer (SL) first ethylene / a-olefin copolymer having a density from 0.940 g / cc to 0.980 g / cc, and(ii) a skin layer (SL) second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc;(b) a first intermediate layer (FIL) in direct contact with the skin layer, the first intermediate layer comprising an FIL ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc;(c) a core layer (CL) in direct contact with the first intermediate layer (b), the core layer (c) comprising(i) a core layer (CL) first ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc, and(ii) a core layer (CL) second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc;(d) a second intermediate layer (SIL) in direct contact with the core layer, the second intermediate layer comprising an SIL ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc;(e) an interior layer (IL) in direct contact with the second intermediate layer, the interior layer comprising(i) an interior layer (IL) first ethylene / a-olefin copolymer having a density from 0.940 g / cc to 0.980 g / cc, and(ii) an interior layer (IL) second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc;(2) a second film; and(3) an adhesive layer between the 1MD0 and the second film.

2. The laminate of claim 1 wherein the skin layer (a) comprisesthe SL first ethylene / a-olefin copolymer having a density from 0.940 g / cc to 0.980 g / cc, a melt index from 0.5 g / 10 min to 1.5 g / 10 min, and a melt temperature from 130°C to 135°C, and(ii) the SL second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc, a melt index from 0.5 g / 10 min to 1.5 g / 10 / min, and a melt temperature from 100°C to 130°C.

3. The laminate of any of claims 1-2 wherein the skin layer (a) comprises(i) from 80 wt% to 95 wt% of the SL first ethylene / a-olefin copolymer, and(ii) from 20 wt% to 5 wt% of the SL second ethylene / a-olefin copolymer.

4. The laminate of any of claims 1-3 wherein the interior layer (e) comprises(i) the IL ethylene / a-olefin copolymer having a density from 0.940 g / cc to 0.980 g / cc, a melt index from 0.5 g / 10 min to 1.5 g / 10 min, and a melt temperature from 130°C to 135°C, and(ii) the IL second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc, a melt index from 0.5 g / 10 min to 1.5 g / 10 / min, and a melt temperature from 100°C to 130°C.

5. The laminate of any of claims 1-4 wherein the interior layer (e) comprises(i) from 80 wt% to 95 wt% of the IL first ethylene / a-olefin copolymer, and(ii) from 20 wt% to 5 wt% of the IL second ethylene / a-olefin copolymer.

6. The laminate of any of claims 1-5 wherein the core layer (c) comprises(i) the CL first ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc, a melt index from 0.5 g / 10 min to 1.5 g / 10 min, and a melt temperature from 110°C to 135°C, and(ii) the CL second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc, a melt index from 0.5 g / 10 min to 1.5 g / 10 / min, and a melt temperature from 100°C to less than 130°C.

7. The laminate of any of claims 1-6 wherein the core layer (c) comprises(i) from 60 wt% to 80 wt% of the CL first ethylene / a-olefin copolymer, and(ii) from 40 wt% to 20 wt% of the CL second ethylene / a-olefin copolymer.

8. The laminate of any of claims 1-7 comprising(1) the 1MD0 comprising(a) the skin layer comprising(i) from 80 wt% to 95 wt% of the SL first ethylene / a-olefin copolymer having a density from 0.940 g / cc to 0.980 g / cc, a melt index from 0.5 g / 10 min to 1.5 g / 10 min, and a melt temperature from 130°C to 135°C, and(ii) from 20 wt% to 5 wt% of the SL second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc, a melt index from 0.5 g / 10 min to 1.5 g / 10 / min, and a melt temperature from 100°C to 130°C;(b) the first intermediate layer in direct contact with the skin layer, the first intermediate layer comprising the FIL ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc, a melt index from 0.5 g / 10 min to 1.5 g / 10 min, and a melt temperature from 110°C to 135°C;(c) the core layer in direct contact with the first intermediate layer (b), the core layer (c) comprising(i) from 60 wt% to 80 wt% of the CL first ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc, a melt index from 0.5 g / 10 min to 1.5 g / 10 min, and a melt temperature from 110°C to 135°C; and(ii) from 40 wt% to 20 wt% of the CL second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc, a melt index from 0.5 g / 10 min to 1.5 g / 10 / min, and a melt temperature from 100°C to 130°C;(d) the second intermediate layer (SIL) in direct contact with the core layer, the second intermediate layer comprising the SIL ethylene / a-olefin copolymer having adensity from 0.920 g / cc to 0.980 g / cc, a melt index from 0.5 g / 10 min to 1.5 g / 10 min, and a melt temperature from 110°C to 135°C;(e) the interior layer (IL) in direct contact with the second intermediate layer, the interior layer comprising(i) from 80 wt% to 95 wt% of the IL first ethylene / a-olefin copolymer having a density from 0.940 g / cc to 0.980 g / cc and a melt index from 0.5 g / 10 min to 1.5 g / 10 min and a melt temperature from 130°C to 135°C, and(ii) from 20 wt% to 5 wt% of the IL second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc and a melt index from 0.5 g / 10 min to 1.5 g / 10 / min, and a melt temperature from 100°C to 130°C.

9. The laminate of any of claims 1-8 wherein the second film comprises an outermost layer (ol); a middle layer (ml) in direct contact with the outermost layer (ol); and an inner layer (in) in direct contact with the middle layer (ml).

10. The laminate of claim 9 wherein the second film is composed solely of one or more ethylene-based polymers.

11. The laminate of any of claims 1-10 wherein the 1MD0 is composed solely of one or more ethylene-based polymers.

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