HARD / RIGID MULTILAYER POLYOLEFINS WITH PLASTOMER AND LAMINATES COMPRISING THEM

Abstract

This description provides a multilayer film having a sealing layer and a first layer, wherein the first layer is formed from a first polyolefin composition and a laminate that includes the multilayer film. The first polyolefin composition of the first layer consists essentially of a high-density polyethylene (HDPE) resin and a propylene-ethylene copolymer thermoplastic elastomer (TPE). In addition to the first layer of the first polyolefin composition and the sealing layer, the laminate also includes a substrate film and an adhesive layer comprising polyurethane in adherent contact with the substrate film and the first layer, wherein, when the adhesive layer is formed from a solvent-free adhesive, the adhesive layer has an elastic modulus greater than 25 MPa, and when the adhesive layer is formed from a solvent-based adhesive, the adhesive layer has an elastic modulus greater than 0.30 MPa, where the elastic modulus is measured for polyurethane according to ASTM D412.

Description

DETAILED DESCRIPTION OF THE INVENTION This description provides a multilayer film comprising a first layer and a sealing layer, and a laminate incorporating the multilayer film. The multilayer film described herein can contribute to achieving high stiffness and toughness in the laminate, due in part to the first layer being formed from a polyolefin composition. The balance of stiffness and toughness provided by the first layer is also significantly improved compared to the use of other elastomers, as discussed herein. A primary application of the laminate incorporating the multilayer film is in stand-up pouches, where an improved balance of stiffness and toughness is required. The laminate incorporating the multilayer film can also be useful for other applications such as heavy-duty shipping bags. For the various embodiments, the multilayer film described herein includes a first layer formed from a first polyolefin composition and a sealing layer over the first layer. The first polyolefin composition described herein consists essentially of a high-density polyethylene (HDPE) resin and a propylene ethylene copolymer thermoplastic elastomer (TPE). Specifically, the first layer is formed from a first polyolefin composition consisting essentially of (a) 80 to 99.9 percent by weight (wt.%) of the HDPE resin having a density of 0.935 to 0.966 g / cm³ measured according to ASTM D792 and a melt index (I²) of 0.3 to 8 q / 10 minutes measured at 190 °C / 2.16 kg according to ASTM D-1238, the wt.% being based on the total weight of the first polyolefin composition, and (b) 0.1 to 20% by weight of propylene-ethylene copolymer TPE comprising at least 60% by weight of propylene-derived units and at least 0.1% by weight of ethylene-derived units and having a density of 0.850 to 0.900 g / cm3 measured according to ASTM D792 and a melt index, I2, of 0.1 to 15 g / 10 minutes measured at 230 °C / 2.16 kg according to ASTM D-1238, the weight % being based on the total weight of the first polyolefin composition. For the various embodiments, the sealing layer of the multilayer film may comprise a polyethylene or a blend of polyethylenes. In some embodiments, the sealing layer of the multilayer film comprises 50 to 100 percent by weight of a polyethylene having a density of 0.880 to 0.915 g / cid, a melt index, I2, of 0.5 to 5 g / 10⁻⁵ minutes measured at 190 UC / 2.16 kg according to ASTM D-1238, a maximum melting point in the range of 85 °C to 105 °C taken at a maximum DSC temperature, and a molecular weight distribution, Mw / Mn range, of 2.0 to 3.0. In some embodiments, the sealing layer comprises a blend of linear low-density polyethylene and a polyolefin plastomer. It is understood, however, that the sealing layer may comprise only a single polyolefin component for the sealing layer (e.g., I read sealing layer is made of 100 percent by weight of linear low-density polyethylene or 100 percent by weight of polyolefin plastomer). As used herein, which essentially consists of or consists essentially of are intended to limit the scope of this description to the specified materials of the first polyolefin composition provided herein and those that do not significantly affect the basic characteristics of the first polyolefin composition used in the first layer of this description. As provided herein, the basic and novel characteristics are provided in the HDPE resins section of the description, as indicated below. The term composition, as used herein, includes a mixture of materials comprising the composition, as well as reaction products and decomposition products formed from the materials of the composition. As used herein, the term multilayer film refers to a sheet, mesh, or similar material, or combinations thereof, having length and width dimensions and having two principal surfaces with an intermediate thickness. A multilayer film has two or more layers bonded together by one or more of the following methods: coextrusion, extrusion coating, vapor deposition coating, solvent coating, emulsion coating, or suspension coating. As used herein, the term laminate refers to a combination of two or more individually formed films and / or multilayer films that are then bonded together, e.g., with an adhesive. The term polymer, as used herein, refers to a polymeric compound prepared by the polymerization of monomers, whether of the same or different types. Therefore, the generic term polymer encompasses the term homopolymer, commonly used to refer to polymers prepared from a single type of monomer, as well as copolymer, which refers to polymers prepared from two or more different monomers. Polyethylene means polymers comprising more than 50% by weight of units derived from ethylene monomers. 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), very low-density polyethylene (VLDPE), single-site catalyzed linear low-density polyethylene, which includes linear and substantially linear low-density resins (m-LLDPE), and high-density polyethylene (HDPE). These polyethylene materials are generally known in the art; however, the following descriptions may be helpful in understanding the differences between some of these different polyethylene resins. The term LDPE may also be called high-pressure ethylene polymer or highly branched polyethylene and is defined as the polymer that is homopolymerized or partially or completely copolymerized in autoclaves 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 incorporated herein by reference). LDPE resins typically have a density in the range of 0.916 to 0.940 g / cm³. The term polyolefin plastomer, as used herein, refers to a polymeric material that has the qualities of both an elastomer and a plastic, where examples of polyolefin plastomers include linear low-density polyethylenes, propylene-ethylene copolymers, and ethylene-alpha-olefin copolymers having a density of 0.870 to 0.905 g / cm3 and a melting point (determined by DSC, DOW method) of 55 °C to 108 °C. The term LLDPE includes both resin made using traditional Ziegler-Natta catalytic systems and single-site catalysts such as metallocenes (sometimes referred to as m-LLDPE) and includes linear, substantially linear, or heterogeneous polyethylene copolymers or homopolymers. LLDPEs contain fewer long-chain branches than LDPEs and include substantially linear ethylene polymers, which are further defined in U.S. Patent No. 5,272,236, U.S. Patent No. 5,278,272, U.S. Patent No. 5,582,923, and U.S. Patent No. 5,733,155; and 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 described in the United States Patent United States Patent No. 4,076,698; and / or mixtures thereof (such as those described in US Patent No. 3,914,342 or US Patent No. 5,854,045). Linear PE may be manufactured by gas-phase, solution-phase, or suspension-phase polymerization, or any combination thereof, using any type of reactor or reactor configuration known in the art, gas-phase and suspension-phase reactors being the most preferred. The term HDPE refers to polyethylenes that have densities greater than approximately 0.940 g / cm3, which are generally prepared with Ziegler-Natta catalysts, chromium catalysts, or even metallocene catalysts. The following analytical methods are used in the present invention: Density is determined according to ASTM D792. The melting index also referred to as I2 is determined according to ASTM D-1238 (measured at 230 °C, 2.16 kg or 190 °C, 2.16 kg as provided in this document). The maximum melting point is determined using a differential scanning calorimeter (DSC) where the film (0.1 to 0.2 mil thick, 3-10 mg, 6 mm diameter sample) is conditioned at 180 UC for 5 minutes before cooling at a rate of 10 °C per minute to a temperature of -40 °C. After the film is held at -40 °C for 5 minutes, it is heated to 200 °C at a rate of 10 °C per minute. The term molecular weight distribution or MWD is defined as the ratio of weight average molecular weight to number average molecular weight (Mw / Mn) - Mw and Mn are determined according to methods known in the technique using conventional gel permeation chromatography (conventional GPC). First layer HDPE resin The HDPE resin of the first layer has a density of 0.935 to 0.966 g / cm³ measured according to ASTM D7 92 and a melting point (I²) of 0.3 to 8 g / 10 minutes measured at 190 °C / 2.16 kg according to ASTM D-1238. For various applications, the HDPE resin may have additional I² and density values. For example, the HDPE resin of the first layer may have a density of 0.945 to 0.966 g / cm³ measured according to ASTM D7 92 and an I² of 0.3 to 2 g / 10 minutes measured at 190 °C / 2.16 kg according to ASTM D-1238. Preferably, HDPE resin has a density of 0.955 to 0.966 g / cm³ measured according to ASTM D792 and an I² of 0.4 to 1 g / 10 minutes measured at 190 °C / 2.16 kg according to ASTM D-1238. In some embodiments, HDPE resin has a density of 0.955 to 0.966 g / cm³ measured according to ASTM D792 and an I² of 0.5 to 1 g / 10 minutes measured at 190 °C / 2.16 kg according to ASTM D-1238. In some embodiments, HDPE resin has a density of 0.962 to 0.966 g / cm3 measured according to ASTM D7 92 and an I2 of 0.8 to 0.9 g / 10 minutes measured at 190 °C / 2.16 kg according to ASTM D-1238. For various grades, HDPE resin also has a modulus of elasticity of 500 to 2000 MPa, where the modulus of elasticity is measured according to ASTM D882-18. The modulus of elasticity tested according to ASTM D882-18 provides an index of the stiffness of a thin sheet (e.g., 0.1 mm to 0.25 mm) of HDPE resin, where the stiffness of the HDPE resin can be taken as the total energy absorbed per unit volume of the thin sheet of HDPE resin up to the point of rupture. In some grades, HDPE resin has a modulus of elasticity of 700 to 1500 MPa, where the modulus of elasticity is measured according to ASTM D882-18. In some grades, HDPE resin has a modulus of elasticity of 1000 to 1200 MPa, where the modulus of elasticity is measured according to ASTM D882-18. The HDPE resin described herein may have a unimodal or bimodal molecular weight distribution. For the various forms, the HDPE resin described herein may be formed by gas-phase polymerization, solution-phase polymerization, or suspension polymerization, or combinations thereof, using reactors or reactor configurations known in the art. The HDPE may be formed as substantially linear ethylene polymers; homogeneously branched linear ethylene polymers; heterogeneously branched ethylene polymers; and / or mixtures thereof. Commercial examples of HDPE resin include those sold under the ELITE™ brand name, available from The Dow Chemical Company. Specific examples of ELITE™ HDPE resins include ELITE™ 5960G, among others. First layer propylene-ethylene copolymer thermoplastic elastomer (TPE) The propylene-ethylene copolymer thermoplastic elastomer (TPE) described herein is a non-functionalized propylene-ethylene copolymer, which may include alternating propylene-ethylene copolymers. A TPE contains at least two segments, one thermoplastic and one elastomeric, which helps provide the propylene-ethylene copolymer TPE with the properties of an elastomer that can be stretched beyond its original length and also has the ability to shrink substantially to its original length when released. The propylene-ethylene copolymer TPE thermoplastic elastomer can also be processed as a thermoplastic with the ability to soften when exposed to heat and return substantially to its original condition when cooled to room temperature. As discussed herein, the first polyolefin composition described herein is formulated with propylene-ethylene copolymer TPE resin to improve the overall balance between hardness and stiffness of the multilayer films formed with the composition. The propylene-ethylene copolymer TPE constitutes 0.1 to 20% by weight of the first polyolefin composition. In some embodiments, the propylene-ethylene copolymer TPE constitutes 5 to 15% by weight of the first polyolefin composition. For the various forms, the propylene-ethylene copolymer TPE resin includes at least 60 wt% of propylene-derived units and at least 0.1 wt% of ethylene-derived units. For example, the propylene-ethylene copolymer TPE resin may include from 60 wt% to 99.9 wt% of propylene-derived units and from 40 wt% to 0.1 wt% of ethylene-derived units. All individual values ​​and sub-ranges from 60 wt% to 99.9 wt% of propylene-derived units and from 40 wt% to 0.1 wt% of ethylene-derived units are included and described herein. For example, propylene-ethylene copolymer TPE units derived from propylene may have a lower limit of 60, 65, 70 or 75% by weight up to an upper limit of 80, 85, 90, 95 or 99.9% by weight, while the units of the ethylene-derived propylene-ethylene copolymer TPE resin can range from a lower limit of 0.1, 5, 10, 15, or 20% by weight to an upper limit of 25, 30, 35, or 40% by weight. Specific examples include propylene-derived propylene-ethylene copolymer TPE resin ranging from 60 to 99.9% by weight, with ethylene-derived units from 0.1 to 40% by weight. Preferably, propylene-derived propylene-ethylene copolymer TPE resin ranging from 65 to 95% by weight, with ethylene-derived units from 5 to 35% by weight. More preferably, the propylene-ethylene copolymer TPE resin is derived from propylene in a range of 65 to 95% by weight, and the ethylene-derived units are from 5 to 35% by weight. The propylene-ethylene copolymer TPE resin has a density of 0.850 to 0.900 g / cm3 measured according to ASTM D792 and a melt index, I2, of 0.1 to 15 g / 10 minutes measured at 230 °C / 2.16 kg according to ASTM D-1238. All individual values ​​and sub-intervals of the density from 0.850 to 0.900 g / cm3 and the melt index, I2, from 0.1 to 15 g / 10 minutes measured at 230 °C / 2.16 kg are provided. For example, propylene-ethylene copolymer TPE resin can have a density ranging from a lower limit of 0.850, 0.855, or 0.860 g / cm³ measured according to ASTM D792 to a maximum of 0.865, 0.870, 0.875, 0.880, 0.885, or 0.900 g / cm³ measured according to ASTM D792. Specific examples include a density in the range of 0.855 to 0.895 g / cm³ measured according to ASTM D792; 0.860 to 0.885 g / cm³ measured according to ASTM D792; or 0.862 to 0.865 g / cm³ measured according to ASTM D792. Propylene-ethylene copolymer TPE resin may have a melt index (I2) in the range of 0.1 to 5 g / 10 min, measured according to ASTM D-1238 (at 230 °C / 2.16 kg). All individual values ​​and sub-ranges from 0.1 to 5 g / 10 min are included and described herein; for example, the I2 may range from a lower limit of 0.1, 0.2, 0.5, 1.0, or 1.5 to an upper limit of 5, 4, 3, or 2.5 g / 10 min. For example, propylene-ethylene copolymer TPE resin may have an I2 in the range of 0.5 to 3 g / 10 min, or alternatively, from 1.5 to 2.5 g / 10 min. The propylene-ethylene copolymer PTE resin has a molecular weight distribution (MWD), defined as weight average molecular weight divided by number average molecular weight (Mw / Mn), of 3.5 or less; alternatively, 3.0 or less; or alternatively, from 1.8 to 3.0. Propylene-ethylene copolymer TPE resin can have a flexural modulus (1% secant) of 20 to 60 megapascals (MPa) measured according to ASTM D790. All individual values ​​and sub-intervals from 20 to 60 MPa are included and described; for example, the flexural modulus can range from a lower limit of 20, 25, 30, or 35 to an upper limit of 60, 55, 50, or 45 MPa. For example, propylene-ethylene copolymer TPE resin can have a flexural modulus in the range of 25 to 55 MPa, or alternatively, from 35 to 45 MPa. Particularly desirable propylene-ethylene copolymer TPEs have a melting temperature of 50 to 130 °C measured using differential scanning calorimetry (DSC) as known in the art, where the melting temperature (Tm) is taken as the DSC maximum. The melting temperature at the DSC maximum is determined by a differential scanning calorimeter (DSC), where the film (0.1 to 0.2 mil thick, 3–10 mg, 6 mm diameter sample) is conditioned at 180 °C for 5 minutes before being cooled at a rate of 10 °C per minute to a temperature of -40 °C. After the film is held at -40 °C for 5 minutes, it is heated to 200 °C at a rate of 10 °C per minute. Examples of such a non-functionalized propylene-ethylene copolymer include, but are not limited to, VERSIFY™ DE 2400.05, available from The Dow Chemical Company. Sealing Layer For the various modalities, the sealing layer refers to at least one of the outer or external layers of the multilayer film and / or laminate, as set out in this document, where the sealing layer is involved in sealing the multilayer film and / or laminate to itself or to a package (e.g., stand-up pouches) to be in contact with the package and close it. For various models, the sealing layer of the multilayer film may comprise a polyethylene or a mixture of polyethylenes. For example, for the various embodiments, the sealing layer comprises 50 to 100 percent, preferably at least 60, 70, 80, 90, or even 100 percent by weight of a polyethylene having a density of 0.880 to 0.915 g / cm³, preferably 0.895 to 0.905 g / cm³, a melt index, I², of 0.5 to 5 g / 10 mins, preferably 0.8 to 1.2 dg / min, more preferably 0.9 to 1.1 dg / min, measured at 190 °C / 2.16 kg according to ASTM D-1238, and a maximum melting point in the range of 85 °C to 105 °C, preferably 90 °C to 100 °C, taken at a maximum Tm of DSC, and a molecular weight distribution, Mw / Mn range, of 2.0 to 3.0. In some embodiments, the sealing layer comprises a mixture of linear low-density polyethylene and polyolefin plastomer.Preferably, when the polyolefin plastomer is present, it is preferably a polyethylene plastomer. However, it is understood that the sealing layer may comprise only a single polyethylene component (e.g., the sealing layer is made of 100 percent by weight of linear low-density polyethylene or 100 percent by weight of a polyolefin plastomer). Preferably, the polyethylene or polyethylene blend provides the sealing layer with a heat-sealing strength of at least 25 N / 25 mm, more preferably at least 30 N / 25 mm, and even more preferably at least 35 N / 25 mm at 90 °C. It is also preferred that the sealing layer have a thickness in the range of 5 to 15 micrometers, preferably in the range of 10 to 15 micrometers. The sealing layer may also comprise other possible polyolefin compositions. Examples of these other polyolefin compositions include ethylene vinyl acetate (EVA) and ethylene methyl acrylate (EMA) copolymers, which are known to provide heat-sealing properties and can be made peelable by incorporating polybutylene or ionomers. Propylene-based elastomers or plastomers (such as the VERSIFY™ family of resins available from Dow Chemical Company), particularly when blended with a second polymer from a group preferably consisting of polyethylene and styrenic polymers, have a sealing strength in the range that makes them suitable for use as a sealing layer in some applications. Linear low-density polyethylene (LLDPE) layers may also be used as a sealing layer, after which the thickness of the sealing layer can be used to determine the peel strength required to break the seal. First polyolefin composition For the various embodiments, the first polyolefin composition described herein consists essentially of (a) 80 to 99.9 percent by weight (wt.%) of HDPE resin and (b) 0.1 to 20 wt. of propylene-ethylene copolymer TPE, both provided herein, where the wt.% values ​​are based on the total weight of the first polyolefin composition. All individual values ​​and sub-ranges of (a) 80 to 99.9 wt. of HDPE resin and (b) 0.1 to 20 wt. of propylene-ethylene copolymer TPE are included and described herein. For example, preferably the first polyolefin composition of the present description consists essentially of (a) 90 to 98 wt% of HDPE resin and (b) 2 to 10 wt% of propylene-ethylene copolymer TPE, both as provided herein, where the wt% values ​​are based on the total weight of the first polyolefin composition.In one specific modality, the first polyolefin composition has 90% by weight of HDPE resin and 10% by weight of propylene-ethylene copolymer TPE. As discussed above, the first polyolefin composition of this description consists essentially of (a) HDPE resin and (b) the propylene-ethylene copolymer TPE, both provided herein. The expressions "consisting essentially of" or "consisting essentially of" limit the scope of this description to the specified materials of the first polyolefin composition provided herein and those that do not significantly affect the basic characteristics of the first polyolefin composition used in the first layer of this description.Other components that may be added to the first polyolefin composition of the present description that do not significantly affect the basic characteristics of the first polyolefin composition used in the first layer of the present description include additives known in the art such as inorganic fillers, conductive fillers, pigments, nucleators, clarifiers, antioxidants, acid scavengers, oxygen scavengers, flame retardants, ultraviolet absorbers, processing aids such as zinc stearate, extrusion aids, slip additives, permeability modifiers, antistatic agents, antiblocking additives, and combinations thereof. The additives may be present in typical amounts of up to 10 percent by weight of the first polyolefin composition. As discussed herein, the multilayer film described herein comprises two or more layers bonded by one or more of the following methods: coextrusion, extrusion coating, vapor deposition coating, solvent coating, emulsion coating, or suspension coating. The multilayer film described herein comprises the first layer formed from the first polyolefin composition and the sealing layer over the first layer. For the various embodiments, the multilayer film may include more than one (e.g., two or more) of each of the first layers and the sealing layer. For example, the sealing layer may be an outer first layer of the multilayer film, where a first layer of the first layer may be an outer second layer, and a second layer of the first layer may be a middle layer between the first and second outer layers of the multilayer film.In this embodiment, the first polyolefin composition of the first layer and the second polyolefin composition of the first layer may be the same or different, depending on the intended purpose of the multilayer film. In a further embodiment, the multilayer film may include one or more of the first layers, the sealing layer, and an additional layer, where the sealing layer and the first layer provide the outer layers of the multilayer film, and the additional layer provides one or more core layers. For these embodiments, the additional layer may be a polyolefin whose composition is different from that of the first polyolefin composition of the first layer(s) and that of the sealing layer. In a further embodiment, the multilayer film may include one or more of the first layers, the sealing layer, and the additional layer, where the sealing layer and the additional layer provide the outer layers of the multilayer film, and the first layer provides one or more core layers.For such embodiments, the additional layer may be a polyolefin whose composition differs from that of the first polyolefin composition of the first layer(s) and that of the sealing layer. The additional layer(s) may advantageously comprise a polymeric material selected from the group consisting of propylene-based plastomers or elastomers, propylene homopolymers, medium-density polyethylene (MDPE), high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), ethylene-based plastomers or elastomers, or mixtures thereof. Such additional layers, when present, may be selected to provide additional functionality as is generally known in the art. The multilayer film described herein may have a total thickness in the range of 10 µm to 400 µm. All individual values ​​and sub-ranges from 50 µm to 400 µm are included and described herein; for example, the total thickness may have a lower limit of 50, 60, 70, or 80 µm up to an upper limit of 200, 300, 350, or 400 µm. For example, the multilayer film may be from 60 µm to 350 µm, or alternatively from 70 µm to 300 µm, or alternatively from 0 pm to 2:00 pm. As discussed herein, the first layer formed from the first polyolefin composition has a thickness of 30 to 150 micrometers (µm). For the various embodiments, the first layer formed from the first polyolefin composition can represent from 30 to 70% of the total thickness of the multilayer film. All individual values ​​and sub-intervals from 30 to 70% are included and described; for example, the first layer can represent a percentage thickness of the total thickness of the multilayer film from a lower limit of 30, 35, or 40% to an upper limit of 55, 65, or 70%. For example, the first layer can be 30 to 70% of the total film thickness, or alternatively 40 to 65%, or alternatively 50 to 65%. The multilayer film described herein can be formed using processes generally known in the art, including blown film and melt film, in which the individual layers can be coextruded. In some embodiments, the multilayer film described herein can also be oriented in the machine direction or the transverse direction, or both in the machine direction and the transverse direction, after the film forming stage. Laminate The present description also provides a laminate that includes (i) a substrate film comprising a biaxially oriented polyethylene terephthalate film, a biaxially oriented polypropylene film, or an oriented polyethylene film; (ii) the multilayer film as provided herein; and (iii) an adhesive layer comprising polyurethane in adherent contact with the substrate film and the first layer of the multilayer film as provided herein, wherein when the adhesive layer is formed from a solvent-free adhesive, the adhesive layer has an elastic modulus greater than 25 MPa, and when the adhesive layer is formed from a solvent-based adhesive, the adhesive layer has an elastic modulus greater than 0.30 MPa, wherein the elastic modulus is measured for polyurethane according to ASTM D412. As used herein, the term laminate refers to a combination of two or more individually formed films and / or multilayer films that are then bonded together, for example, with the adhesive layer. The term adhesive layer means an inner layer whose primary purpose is to provide adhesion between layers directly adjacent or contiguous, for example, between the layers of the multilayer film and the substrate film, both as provided herein. For the various embodiments, the laminate described herein can be formed by laminating (i) the substrate film, (ii) the multilayer film, and (iii) the adhesive layer, which is in adherent contact with the substrate film and the first layer of the multilayer film, each of (i), (ii), and (iii) as provided herein. Processes for such a lamination process include extrusion lamination processes as known in the art. Substrate film The substrate film of the laminate can be a biaxially oriented polyethylene terephthalate film, a biaxially oriented polypropylene film, or a monoaxially oriented polyethylene film. For the various embodiments, the substrate film may preferably be a biaxially oriented polyethylene terephthalate film with a thickness of 8 to 20 µm. In an alternative embodiment, the substrate film may be a biaxially oriented polypropylene film with a thickness of 15 to 50 µm. The substrate film may also be a biaxially oriented polyethylene film or a monoaxially oriented polyethylene film with a thickness of 15 to 50 µm. Adhesive layer As provided herein, the adhesive layer comprises a polyurethane in adherent contact with the substrate film and the first layer. In some embodiments, the adhesive layer can be formed from a solvent-free adhesive or a solvent-based adhesive. In these embodiments, the adhesive layer is located between and in direct contact with the substrate film and the first layer of the first polyolefin composition, without any intermediate layers or coatings being applied between the substrate film and the first layer. The film surfaces to be coated with the adhesive layer can be corona-treated to increase surface energy and provide sufficient wettability for the adhesive components. In some embodiments, the adhesive layer comprises a polyurethane. In one or more embodiments, the adhesive is a two-component mixture of polyol and isocyanate with optional components such as catalysts and diluents. An exemplary solventless laminated two-component adhesive includes a polyurethane comprising a first component that is an isocyanate-terminated prepolymer. The second component of the polyurethane is a polyester / polyether fabricated from linear and difunctional polyols. An example of a solvent-based adhesive layer comprises a polyurethane comprising a first component that is 100% polyester-based with methyl ethyl ketone as a diluent. The second component is an isocyanate-terminated prepolymer. For example, suitable solventless adhesives may include, by way of example and without limitation, two-component polyurethane adhesive systems using commercially available components from The Dow Chemical Company (Midland, MI, USA) under the names MOR-FREE™, including (1) MOR-FREE™ 698A + MOR-FREE™ C79 or (2) MOR-FREE™ 698A + polypropylene glycol (e.g., Mn 446).Examples of suitable solvent-based adhesives for use may include, but are not limited to, two-component polyurethane adhesive systems using commercially available components from The Dow Chemical Company, such as (1) ADCOTE™ 563EA + Catalyst for (2) ADCOTE™ 811 + MOR-FREE™ 2000. The above bond layer compositions provide a bond layer with an elastic modulus greater than 25 MPa when formed from a solvent-free adhesive, and when formed from a solvent-based adhesive, the bond layer has an elastic modulus greater than 0.30 MPa. The elastic modulus for polyurethane is measured according to ASTM D412. For the various forms, the adhesive layer can have a thickness of 1 to 5 µm. In certain forms, the adhesive layer has a weight per square meter of approximately 0.5 g / m² to 5 g / m², more preferably 1 g / m² to 3 g / m². The adhesive layer can be applied to the first and second films in any suitable manner. For example, the methods described herein may include, but are not limited to, the use of a laminating machine, gravure coating, roller coating, wire coating, flexographic printing, spray coating, screen printing, and similar methods. Film forming techniques The laminate and / or multilayer film described herein can be formed using techniques known in the art. For example, the multilayer film with the first layer made of the first polyolefin composition and the sealing layer made of the polyolefin composition provided herein can be manufactured using conventional melt extrusion or single-bubble techniques, as well as by using more elaborate techniques such as the tension-frame or double-bubble process. "Stretching" and "orienting" are used interchangeably in the art and herein, although orientation is actually the result of stretching a film by, for example, internal air pressure pressing the tube or by a tensioning arm stretching the edges of the film. Simple blown bubble film processes are described, for example, in The Encyclopedia of Chemical Technology, Kirk-Othmer, third edition, John Wiley & Sons, New York, 1981, vol. 16, pp. 416-417 and vol. 18, pp. 191-192, whose descriptions are incorporated herein by reference. Processes for the manufacture of biaxially oriented films, such as the double bubble process described in U.S. Patent No. 3,456,044 (Pahlke), and other processes suitable for preparing a stretched or biaxially oriented film are described in U.S. Patent No. 4,865,902 (Golike et al.), U.S. Patent No. 4,352,849 (Mueller), U.S. Patent No. 4,820,557 (Warren), and U.S. Patent No. 4,927,708 (Herran et al.), U.S. patent no. 4,963,419 (Lustig et al.), and U.S. patent no. 4,952,451 (Mueller), the descriptions of which are incorporated herein by reference.Multilayer film structures can also be made as described in a tensioned structure technique, such as that used for oriented polypropylene. For bubble blowing processes, the multilayer film described herein can be formed using high blow ratios, for example, greater than or equal to 2.5:1. The blow ratio, abbreviated herein as BUR, is calculated using the equation: BUR = bubble diameter / die diameter. Other multilayer film manufacturing techniques include those described in Packaging Foods With Plastics, by Wilmer A. Jenkins and James P. Harrington (1991), pp. 19-27, and in Coextrusion Basics by Thomas I. Butler, Film Extrusion Manual: Process, Materials, Properties, pp. 31-80 (published by TAPPI Press (1992)), whose descriptions are incorporated herein by reference. The laminate described herein can also be formed using known techniques. Processes for such lamination include extrusion lamination processes as known in the art, where the lamination process for bonding the layers is performed as a secondary operation to the multilayer film forming process. The lamination process bonds the multilayer film to the substrate film using the adhesive layer, each as provided herein, where the processes are as described by KR Osborn and WA Jenkins in Blastic Films. Technology and Packaging Applications (Technomic Publishing Co., Inc. (1992)). Laminate and / or multilayer film can also undergo other post-extrusion techniques, such as a biaxial orientation process. Other layers can also be included in this laminate formation process. For example, the laminate described herein may also include other layers, including but not limited to barrier layers, bonding layers, and / or structural layers. Various materials can be used for these layers, and some of these may be used in more than one layer within the same laminate structure. Some of these materials include: sheets, nylon, ethylene / vinyl alcohol copolymers (EVOH), polyvinylidene chloride (PVDC), polyethylene terephthalate (PET), oriented polypropylene (OPP), ethylene / vinyl acetate copolymers (EVA), ethylene / acrylic acid copolymers (EAA), ethylene / methacrylic acid copolymers (EMAA), LLDPE, HDPE, LDPE, nylon, grafting adhesive polymers (e.g., polyethylene grafted with maleic anhydride), and paper. For the various laminate types, the laminate may also include a toner or ink image printed on at least one layer. In certain types, an outer surface of the laminate may include printing. Other surfaces of one or more of the laminate's films and / or multilayer films may also include printing. Printing on the laminate can be achieved using machinery and processes known in the art, such as corona printing, a digital press, and liquid toner / ink. The embodiments described herein also provide a package comprising the laminate as provided herein, where the packaging can be used for liquids, solids, and / or particles, such as beverages, food, cosmetics, and pharmaceuticals. The package can be any format suitable for containing liquids and / or solids, including, but not limited to, flexible packaging, pouches, bags, and stand-up pouches. In one embodiment, the package comprising the laminate is a stand-up pouch. Other packaging structures include, but are not limited to, flexible packaging formed from any of the first layer and / or laminate described herein. In one particular aspect, the package can be processed on conventional packaging equipment, including, for example, VFFS, HFFS, and Doypack equipment. Examples Some variations of the above description will be detailed in the following Examples, where all parts and percentages are by weight unless otherwise specified. The following materials and tests are used in the Examples. Table 1: Materials Polymer Producer Type Module1 MFI2 (g / 10min) Density3 (g / cm3) ELITE™ 5960 The Dow Chemical Company (Dow) Polyethylene resin -1100 MPa (drier, MD, 1%) 0.85 (190°C, 2.16 kg) 0.962 ELITE™ 5940ST (DOW) Polyethylene resin Polyolefin elastomer ENGAGE™ 8842 DOW Ethylene / o-olefin (EO) copolymer 4.0 MPa (drier) 1 (190°C, 2.16 kg) 0.857 Polyolefin elastomer ENGAGE XLT™ 8677 DOW EO block copolymer 6.6 MPa (drier) 1 (190°C, 2.16 kg) 0.866 INFUSE™ 9107 DOW Polyolefin Elastomer EO Block Copolymer 4.0 MPa (drying) 2.8 (190 °C, 2.16 kg) 0.862 VERSIFY™ DE2400.05 DOW Elastomer Propylene / Ethylene Copolymer 41 MPa (flexural) 2 (230 °C, 2.16 kg) 0.863 VERSIFY™ DOW Elastomer Propylene / Ethylene Copolymer 62 MPa (flexural) 2 (230 °C, 2.16 kg) 0.867 2300 AFFINITY™ PL1881G DOW Ethyl / octeno copolymer 80 MPa (Secant) 1 (190 °C, 2.16 kg) 0.904 5 DOWLEX™ NG 5056G DOW Low density linear polyethylene (LLDPE) 198 MPa (secant, 2 %, MD) 1.1 (190°C, 2.16 kg) 0.919 10 MOR-FREE™ 698 A (MF 698) DOW Two-component polyurethane adhesive system without solvents 15 MOR-FREE™ C79 (MF C79) DOW Two-component polyurethane adhesive system without solvents 20 MOR-FREE™ 200C (MF 200C) DOW MOR-FREE™ L-PLUS (L+) Two-Component Solvent-Free Polyurethane Adhesive System DOW MOR-FREE™ L-PLUS (L+) Two-Component Solvent-Free Polyurethane Adhesive System — — — 5 CR 121 DOW System component polyester / isocyanate two-part solvent adhesive PPG 400 Polyether polyol — — — ADCOTE™ DOW System _ _ _ 563 EA 10 two-part polyester / isocyanate solvent adhesive Catalyst F DOW System component (CatF) 15 ADCOTE™ DOW two-part solvent polyester / isocyanate adhesive system component System 20 811 EA two-component polyester / isocyanone solvent adhesive 1- Module measured according to ASTM D882. IVIA / a / ¿U¿¿ / UUO I 11 2- MFI measured according to ASTM D-1238. 3- Density measured according to ASTM D792. Polyolefin composition, first layers and description of methods Table 2: Polyolefin compositions CE1 A CEB CEC CED CEE Ex.1 ELITE™ 5960 100 90 80 90 90 90 ENGAGE™ 8842 10 20 ENGAGE XLT™ 8677 10 INFUSE™ 9107 10 VERSIFY™ DE2400.05 10 - Reference polyolefin compositions (Comparative Example - EC; Example = Ej; Values ​​in weight percent based on the total weight of the polyolefin composition) Composition of polyolefin compositions Compound the polyolefin compositions of the Comparative Examples (CE) and the Example (Ej.) shown in Table 2 using a Buss Compounder MDK / E46 (Buss AG, Switzerland) with a single mixing screw having an L / D ratio of 46 mm. The temperature profile of the Buss Compounder was 190 / 200 / 210 / 210 °C and the production rate was 12 kg / h, with underwater granulation and granule drying before collection. Production of the first layer Produce the first layer on a laboratory scale using a Dr. Collin line (60 mm nozzle, 9 kg / h output, 230 °C nozzle temperature, and 2.5 expansion ratio) and the CE and Ej polyolefin compositions shown in Table 2, or on a large scale using an Alpine Line 3-layer extrusion line (200 mm nozzle, 100 kg / h output, 230 °C nozzle temperature, and 2.5 expansion ratio) where the weight percentage of HDPE resin and propylene ethylene copolymer TPE shown in Table 2 is dry-mixed directly in the blown film line extruder. The first layers are 100 gm thick. Dart drop impact test Test the first layers using the dart drop impact test according to ISO 6603-4. The dart drop impact test evaluates the impact resistance or toughness of a plastic film. The dart drop impact test uses a single dart configuration and a single drop height, while varying the dart weight. Flexion tests Test the stress-strain behavior of the first layers using a universal testing machine Zwick Z010 (Zwick / Roell) according to ISO 178. Module / secant module tests Determine the secant modulus using a Zwick Z010 universal testing machine (Zwick / Roell) according to ASTM D882. High-speed traction tests Record high voltage tests on a Zwick Roell HIT25P (Zwick / Roell) at a speed of up to 2 m / sec and with a force of 2.5 kN. Drop test Perform the drop test as follows. Use a ladder method consisting of twenty (20) drop events from different heights, where the drop height increases in 200 cm increments until failure occurs. Repeat the test, but this time reduce the height of each drop event by 200 cm until the sample (e.g., the bag) shows no failure. The ladder method (ASTM D2463-10b test) provides the maximum height without failure, the minimum height without failure, and the mean failure height. The mean failure height represents the height at which half of the tested bags are most likely to fail and is used to compare samples. Yield strength, necking strength, and relative reduction of yield strength tests to necking strength Perform yield strength, necking strength, and relative reduction of yield strength to necking strength tests on flows. Prepare 70 mm x 15 mm CE A, CE B, and Ej. 1 film samples. On a vibration-resistant table, set up a pendulum tensile impact test (25J ceramic pendulum impact measuring instrument) instrumented to control the impact velocity up to 3.8 m / s, which is within the strain rate range for packaging applications. Perform two different impact tests on the pendulum tensile impact test setup: one for pure film impact tensile strength and one for heat-sealed film impact tensile strength. Place each sample in its predefined location and adjust the pendulum to the desired velocity (position or angle).Measure the stress-strain curves, maximum test force, energy, displacement, and other test parameters of the samples at arbitrary speeds up to 3.8 m / s and a force of 2.5 kN. The measurement frequency is up to 4 MHz per channel. Table 3 provides the results of these tests. Table 3 - Yield strength, necking strength, and relative reduction of yield strength tests to necking strength MD Direction Yield Strength (MPa) Necking Strength (MPa) Yield-Necking Difference (%) CEA 28.498 18.5 35.1 % CEB 25.26 19.44 23.0 % Ex.1 24.92 16.22 34.9 % Figure 1 presents the tensile strength curves of a 100 µm thick film prepared on a large scale using each of the polyolefin compositions for CE A, CE B, and Ej. 1, as provided herein. The data for CE C, CE D, and CE E showed tensile properties similar to those of CE B. Furthermore, the machine direction (MD) data shown in Table 3 are provided only for films prepared with CE A, CE B, and Ej. 1, since the results obtained in the transverse direction (CD) were very similar to those for MD. Hardness / rigidity balance Figure 2 presents the hardness / stiffness balance of a 100 µm thick film (single films and coextruded films) prepared on a large scale and at a laboratory scale, as discussed above, using each of the composite formulations for CE A, CE B, and Ej. 1, as provided in this document. The 100 µm thick film is either a single 100 µm layer formed with each of the composite formulations for CE A, CE B, and Ej. 1, or a multilayer film formed by coextruding three separate layers of the same composite formulations for CE A, CE B, or Ej. 1. As seen in Fig. 2, there is a large and surprising increase in the hardness of the films formed with the composite formulation of Ex. 1 compared to the films formed with CE A or CE B. This observation is valid for films made on a laboratory scale: single 100 pm film (dart drop energy X 2.90), coextruded films (dart drop energy X 2.59) or on a large scale: single 100 pm film (dart drop energy X 1.75), coextruded films (dart drop energy X 2.39). These data highlight the toughness performance of VERSIFY™ DE2400.05 (Ex. 1) compared to other polyolefin thermoplastic elastomers (TPE) such as ENGACE™ 8842 (CE B), with which the dart drop performance is only multiplied by 1.17 to 1.22, depending on the type of film studied. The addition of TPE also affects stiffness. The addition of 10% VERSIFY™ DE2400.05 in Ex. 1 leads to a 20% decrease in the large-scale Young's modulus, which is within the range of the expected decrease in stiffness iviA / a / zuzz / uuo i 11 with the use of this concentration of TPE in an HDPE matrix. Laminates with PET / Monoextruded Films and PET / Coextruded Films Commercially available biaxially oriented PET (BOPET) films with a thickness of 12 microns were used. The films were purchased from Mitsubishi Polyester Film under the trade name HOSTAPHAN. The BOPET laminates with the coextruded and monoextruded films were produced on a NORDMECCANICA LABOCOMBI L400 using the lamination adhesive systems in Table 1. BOPET / monoextruded and BOPET / coextruded films were produced using various solvent-free and solvent-based adhesives; both rigid and flexible. Details of the adhesives used are described in Table 4. Table 4 - References for polyurethane adhesives for laminations Supplier Matrix Mixing Ratio Type [MOR-FREE™ 698 A : MOR-FREE™ C79] Dow [100:50] Rigid solvent-free [MOR-FREE™ 698 A: PPG 400] Dow [100:55] Flexible solvent-free [ADCOTE™ 563 EA: Cat F] Dow [100:14] Rigid solvent-based [ADCOTE™A 811 EA / MOR-FREE™ 2000] Dow [100:4.5] Flexible solvent-based In Table 4, polyurethane adhesives were classified from rigid to flexible based on the following characteristics: (1) Average functionality – the higher the average functionality, the more rigid the adhesive, and vice versa; (2) Weight percent of aromatics / aliphatics – the higher the concentration of aromatics, the more rigid the adhesive, and vice versa; (3) Mole percent fractions of ether groups, ester groups, and urethane groups: the higher the concentration of ether, the more flexible the adhesive. Conversely, the higher the concentration of ester and urethane, the more rigid the adhesive; (4) Hansen's theoretical solubility parameter: this parameter describes the polarity of the system. The higher the Hansen's solubility parameter, the better the adhesive will adhere to a polar substrate. Laminates with BOPET / Monoextruded films Table 5: Critical fall height properties Formulation Average bag failure height [cm] Ex. 1 - Rigid adhesive SB / BOPET 193 Ex. 1 - Rigid adhesive SL / BOPET 192 CE A - Rigid adhesive SB / BOPET 150 CE A - Rigid adhesive SL / BOPET 116 Figure 3 compares the critical drop heights of the laminates prepared with the range of adhesives described in the Table 4. The laminates were prepared with a 12 µm thick BOPET film and a 100 µm thick film of either the CE A composite formulation, the CE B composite formulation, or the Ej. 1 composite formulation, as shown in Table 5 above. As illustrated in Fig. 3, higher drop performance values ​​are achieved when using a laminate containing a TPE, associated with the use of a rigid adhesive (solvent-based or solvent-free). Sealing performance PET laminates / coextruded films: performance of tensile properties and drop height Drop height performance can be linked to seal performance. The performance of the test seal using the high-speed tensile test was discussed earlier. The results obtained for seals using the laminates used for drop height tests are summarized in Table 6 and Table 7. Table 6: Critical Drop Height / Sealing Performance Properties Formulation Bag sealing energy absorption (J) Ex. 1 - Rigid adhesive SB / BOPET 0.71 Ex. 1 - Rigid adhesive SL / BOPET 0.32 CE A - Rigid adhesive SB / BOPET 0.26 CE A - Rigid adhesive SL / BOPET 0.14 Table 7: Formulation Critical drop height of the bag (cm) LLDPE / Ex. 1 / LLDPE-RIGID SL-BOPET 373 LLDPE / CE A / LLDPE-RIGID SL-BOPET 320 The sealing strength study highlights that the highest sealing performances were observed when using a film made from the composite formulation of Ex. 1 as seen in Tables 6 and 7 above, together with a rigid solvent-based adhesive. Figure 4 summarizes the tensile properties of laminates made from PET / coextruded films with various adhesives. Similar to the study on laminates made from monoextruded films, this study highlights that higher performance in terms of tensile strength, strain at break, and, most importantly, failure height is achieved when using a combination of a laminate containing VERSIFY™ DE2400.05 Elastomer in its coextruded film (Example 1) with a solvent-free adhesive. As seen previously, the addition of thermoplastic polyolefin elastomer, and especially VERSIFY™ TPE, to thin films (up to 100 µm) allows for a significant increase in the impact resistance of HDPE films, with a limited decrease in stiffness. Furthermore, the addition of a TPE (e.g., VERSIFY™ TPE) to a monolayer or coextruded layer, laminated with a PET layer to form a bag, results in a significant and remarkable improvement in the drop performance of a stand-up pouch, particularly when the films are laminated with a rigid, solvent-free adhesive as described herein. An additional example of a multilayer film of the present description includes one having a three-layer structure (A / B / C) with a total thickness of 100 micrometers, formed on the Alpine 3-layer extrusion line with an expansion ratio of 2.5 and having a thickness percentage of each layer of 25 / 50 / 25, where A is ELITE™ 5940ST + 10% VERSIFY™ 2300; B is ELITE™ 5940ST + 10% VERSIFY™ 2300; and C is the AFFINITY™ 1881G sealant. Laminate this multilayer example on a Nordmeccanica pilot line with 12-micron BOPET films using a MOR-FREE™ adhesive system: L+ / CR 121. Convert the laminates into a stand-up pouch (SUP) filled with 370 ml of water. Perform a drop test of these bags in a bag drop tester using the ladder method to determine the critical height for survival when dropped from this height (50% of the bags fail or break when dropped from this height).The average survival drop height of the bag for the example was 291 millimeters, demonstrating that with the inventive system of a medium-to-high density core layer modified with a small amount of elastomeric material such as Versify 2300, a very similar critical drop height can be achieved for a much stiffer PE film (compared to the 0.920 g / cm³ reference film made of DOWLEX™ 50656G), which is not possible with the medium-to-high density film alone. Furthermore, this data shows the need for a suitable sealing layer such as AFFINITY™ 1881 or DOWLEX™ 5056G (LLDPE) to ensure adequate drop test performance of stiffer PE films. Stiffer PE films allow for a reduction in the thickness of the PE films without compromising the drop test performance of the liquid-filled SUP. It is hereby stated that, as of this date, the best method known to the applicant for putting the aforementioned invention into practice is the one that is clear from the present description of the invention.

Claims

Having described the invention as above, the following claims are claimed as property:

1. A multilayer film characterized in that it comprises: a first layer formed from a first polyolefin composition consisting essentially of: (a) 80 to 99.9 percent by weight (% wt) of a high-density polyethylene (HDPE) resin having a density of 0.935 to 0.966 g / cm3 measured in accordance with ASTM D792 and a melt index (I2) of 0.3 to 8 g / 10 minutes measured at 190 °C / 2.16 kg according to ASTM D-1238, the % wt being based on the total weight of the first polyolefin composition; and (b) 0.1 to 20% by weight of a propylene-ethylene copolymer thermoplastic elastomer (TPE) comprising at least 60% by weight of propylene-derived units and at least 0.1% by weight of ethylene-derived units and having a density of 0.850 to 0.900 g / cm3 as measured according to ASTM D792 and a melt index, I2, of 0.1 to 15 g / 10 minutes measured at 230 °C / 2.16 kg according to ASTM D-1238, the % by weight based on the total weight of the first polyolefin composition; and a sealing layer over the first layer.

2. The multilayer film according to claim 1, characterized in that the propylene-ethylene copolymer TPE has a melting temperature of 50 to 130 °C taken at a maximum Tm of DSC, or wherein the propylene-ethylene copolymer TPE has a flexural modulus of 20 to 60 megapascals (MPa) measured according to ASTM D790.

3. The multilayer film according to any of claims 1-2, characterized in that the first polyolefin composition has between 90 and 98% by weight of HDPE resin and between 2 and 10% by weight of propylene-ethylene copolymer TPE.

4. The multilayer film according to any of claims 1-3, characterized in that the first layer formed from the first polyolefin composition has a thickness of 30 to 150 micrometers (µm), or wherein the sealing layer comprises 50 to 100 percent by weight of a polyethylene sealing layer having a density of 0.880 to 0.915 g / cm3 and a melt index, I2, of 0.5 to 5 g / 10 minutes measured at 190 °C / 2.16 kg according to ASTM D-1238, and a maximum melting point in the range of 85 °C to 105 °C, and a molecular weight distribution, Mw / Mn range, of 2.0 to 3.

0. 5.A laminate characterized in that it comprises, (i) a substrate film comprising a biaxially oriented polyethylene terephthalate film, a biaxially oriented polypropylene film, or an oriented polyethylene film; (ii) the multilayer film according to any one of claims 1-6; and (iii) an adhesive layer comprising polyurethane in adherent contact with the substrate film and the first layer of the multilayer film according to any one of claims 1-6, wherein when the adhesive layer is formed from a solvent-free adhesive, the adhesive layer has an elastic modulus greater than 25 MPa, and when the adhesive layer is formed from a solvent-based adhesive, the adhesive layer has an elastic modulus greater than 0.30 MPa, wherein the elastic modulus for polyurethane is measured according to ASTM D412.

6. The laminate according to claim 5, characterized in that the substrate film is a biaxially oriented polyethylene terephthalate film having a thickness of 8 to 20 pm, or wherein the substrate film is a biaxially oriented polypropylene film having a thickness of 15 to 50 pm, or wherein the substrate film is a biaxially oriented polyethylene film or a monoaxially oriented polyethylene film having a thickness of 15 to 50 µm, or wherein the adhesive layer has a thickness of 1 to 5 pm.

7. The laminate according to any of claims 5-6, characterized in that the first polyolefin composition of the first layer of the multilayer film includes 5 to 15% by weight of propylene-ethylene copolymer TPE.

8. A package characterized in that it comprises the laminate in accordance with any of claims 5-7.

9. The package according to claim 8, characterized in that the package is a stand-up pouch.

10. The multilayer film according to any of claims 1-4, characterized in that it is a blown film or a cast film.