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WO2025231142A1 - Stratifié avec film multicouche orienté dans le sens machine - Google Patents

Stratifié avec film multicouche orienté dans le sens machine

Info

Publication number
WO2025231142A1
WO2025231142A1 PCT/US2025/027108 US2025027108W WO2025231142A1 WO 2025231142 A1 WO2025231142 A1 WO 2025231142A1 US 2025027108 W US2025027108 W US 2025027108W WO 2025231142 A1 WO2025231142 A1 WO 2025231142A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
ethylene
olefin copolymer
density
film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/US2025/027108
Other languages
English (en)
Inventor
Prem K. CHATURVEDI
Nrusingh SAHU
Nimisha Rahul PATHARE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dow Global Technologies LLC
Original Assignee
Dow Global Technologies LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dow Global Technologies LLC filed Critical Dow Global Technologies LLC
Publication of WO2025231142A1 publication Critical patent/WO2025231142A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/242—All polymers belonging to those covered by group B32B27/32
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2272/00—Resin or rubber layer comprising scrap, waste or recycling material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • B32B2307/516—Oriented mono-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/72—Density
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B32B2307/734—Dimensional stability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B32B2307/737—Dimensions, e.g. volume or area
    • B32B2307/7375—Linear, e.g. length, distance or width
    • B32B2307/7376—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/748—Releasability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/75—Printability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/02—Open containers
    • B32B2439/06—Bags, sacks, sachets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/80—Medical packaging

Definitions

  • the present disclosure relates to laminates, and more specifically, laminates comprising machine direction oriented multilayer films.
  • Polyolefin films are widely used in flexible packaging, either as stand-alone packaging or in lamination film.
  • the flexible packaging market is moving toward mono-material solutions based on ethylenebased polymers (commonly referred to "polyethylenes").
  • polyethylenes commonly referred to "polyethylenes”
  • 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).
  • OPET oriented polyethylene terephthalate
  • OPP oriented polypropylene
  • OPA oriented polyamide
  • 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.
  • MDO-polyethylene MDO-polyethylene
  • MDO-PE MDO-polyethylene
  • stand-up spouted zipper pouches for holding greater than 3kg bulk material
  • 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.
  • 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.
  • PET polyethylene terephthalate
  • BOPP biaxially oriented polypropylene
  • MDO-PE laminates that do not de-laminate, particularly for bulk flexible packaging applications (contents from 3 kg to 40 kg).
  • 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.
  • FIG. 1 is a graph showing average bond strength performance for comparative samples and inventive examples.
  • FIG. 2 is a graph showing average seal strength performance for comparative samples and inventive examples.
  • the numerical ranges disclosed herein include all values from, and including, the lower and upper value.
  • 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.).
  • blend 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).
  • 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.
  • 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.
  • 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.
  • 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.
  • 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).
  • LDPE Low Density Polyethylene
  • LLDPE Linear Low Density Polyethylene
  • ULDPE Ultra Low Density Polyethylene
  • POP ethylene-based plastomers
  • POE ethylene-based elastomers
  • MDPE Medium Density Polyethylene
  • HDPE High Density Polyethylene
  • LDPE low density polyethylene polymer
  • 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/cm 3 to 0.935 g/cm 3 .
  • 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.
  • 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.
  • MDPE refers to polyethylenes having densities from 0.926 g/cm 3 to 0.935 g/cm 3 .
  • 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.
  • MWD molecular weight distribution
  • HDPE refers to polyethylenes having densities from 0.935 g/cm 3 and up to about 0.980 g/cm 3 , 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).
  • ULDPE refers to polyethylenes having densities of 0.855 to 0.912 g/cm 3 , 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/cm 3 to 0.912 g/cm 3 .
  • 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.
  • heteroatom is an atom other than carbon or hydrogen.
  • the heteroatom can be a 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.
  • 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.
  • 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.
  • 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.
  • a "multilayer structure” is a structure having more than one layer.
  • 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.
  • a three layer structure having a core layer B, and two external layers A and C may be designated as A/B/C.
  • An "olefin” is an unsaturated, aliphatic hydrocarbon having a carbon-carbon double bond.
  • 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.
  • olefin-based polymer include ethylene-based polymer and propylene- based polymer.
  • 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, usually employed to refer to polymers prepared from at least two types of monomers. It also embraces all forms of copolymer, e.g., random, block, etc.
  • 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.
  • 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.
  • polymers herein are referred to as being based on “units” that are the polymerized form of a corresponding monomer.
  • 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.
  • 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 0.900 g/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.
  • 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.
  • 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).
  • ethylene-based polymers or ethylene/a-olefin copolymers
  • 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.
  • 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.
  • 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.
  • the comonomer is butene, hexene, or octene.
  • 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 density from 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.
  • 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.
  • 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.
  • 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).
  • 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 from 125°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.
  • 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).
  • 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.
  • 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).
  • 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).
  • 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 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 100°C to 125°C, or from 115°C to 125°C, or from 120°C to 125°C.
  • 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).
  • the composition and structure (/.e., layer volume) of the interior layer (e) is identical to the composition and structure of the skin layer (a).
  • 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).
  • 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.
  • the 1MD0 multilayer film consists of, or consists essentially of, ethylene-based polymers (and optional additives).
  • 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.
  • the second film can have two, or three, or four, or five, or six, or seven, or eight, or nine, or more layers.
  • 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 inner layer (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).
  • 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.
  • 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.
  • 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.
  • 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 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 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.
  • 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.
  • 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.
  • 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.
  • Each layer in the 1MD0 multilayer film and/or in the second film may include one or more optional additives.
  • 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.
  • 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).
  • 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 the second film.
  • suitable adhesive material for the adhesive layer include solvent-based adhesives, solvent-less adhesives, aqueous adhesives, polyurethane, epoxy, acrylic, extruded polyethylene or the like.
  • the laminate includes an adhesive layer composed of a polyurethane adhesive.
  • the polyurethane adhesive may be solventfree, waterborne or sumble-based.
  • 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.
  • heat seal conditions 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/cm 2 ("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.
  • 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.
  • an "all-polyethylene” substrate all-polyethylene 1MD0 and all-polyethylene second film
  • PET polyethylene terephthalate
  • 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 sachets to large bulk pouches for containing from 3 kg to 40 kg, or from 10 kg to 40 kg material content.
  • Bond strength was measured in accordance with ASTM F88. Results were reported in g/15 mm.
  • 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.
  • 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).
  • Laminates were prepared with solvent-free (SF) and solvent-based (SB) lamination process using SF adhesive MORFREETM 899A/C99, SB adhesive -ADCOTETM 545EA/COREACTANT F Adhesive by using K Bar coated and hot roll laminator.
  • 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 MORFREETM 899A/C99 or PacAcelTM 968/C108.
  • PET polyethylene terephthalate
  • Table 4 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.
  • GSM grams per square meter
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • laminates with PacAcel 1209A/B as adhesive layer yields greater bond strength compared to laminates with MORFREE 899A/C99 as adhesive layer.
  • 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.
  • Comparative samples made with MORFREE 899A/C99 adhesive layer 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.
  • Laminate structures with PM-l and PM-2 as 1MD0 multilayer film showed improvement in bond strength compared to the same laminate structures with PM as multilayer film (100% ELITE AT6900 in skin layer).
  • 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.

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Abstract

La présente divulgation concerne un stratifié. Dans un mode de réalisation, le stratifié comprend (1) un premier film multicouche orienté dans le sens machine (1MDO), (2) un second film et (3) une couche adhésive entre le film 1MDO et le second film. Le film 1MDO comprend (a) une couche de peau ayant (i) un premier copolymère d'éthylène/α-oléfine de couche de peau (SL) ayant une masse volumique de 0,940 g/cm3 à 0,980 g/cm3 et (ii) un second copolymère d'éthylène/α-oléfine de couche de peau (SL) ayant une masse volumique de 0,900 g/cm3 à 0,940 g/cm3. Le film 1MDO comprend (b) une première couche intermédiaire (FIL) en contact direct avec la couche de peau. La première couche intermédiaire comprend un premier copolymère d'éthylène/α-oléfine de couche FIL ayant une masse volumique de 0,920 g/cm3 à 0,980 g/cm3. Le film 1MDO comprend (c) une couche d'âme (CL) en contact direct avec la première couche intermédiaire (b). La couche d'âme (c) comprend (i) un premier copolymère d'éthylène/α-oléfine de couche d'âme (CL) ayant une masse volumique de 0,920 g/cm3 à 0,980 g/cm3 et (ii) un second copolymère d'éthylène/α-oléfine de couche d'âme (CL) ayant une masse volumique de 0,900 g/cm3 à 0,940 g/cm3. Le film 1MDO comprend (d) une seconde couche intermédiaire (SIL) en contact direct avec la couche d'âme. La seconde couche intermédiaire comprend un copolymère d'éthylène/α-oléfine de couche SIL ayant une masse volumique de 0,920 g/cm3 à 0,980 g/cm3. Le film 1MDO comprend (e) une couche intérieure (IL) en contact direct avec la seconde couche intermédiaire. La couche intérieure comprend (i) un premier copolymère d'éthylène/α-oléfine de couche intérieure (IL) ayant une masse volumique de 0,940 g/cm3 à 0,980 g/cm3 et (ii) un second copolymère d'éthylène/α-oléfine de couche intérieure (IL) ayant une masse volumique de 0,900 g/cm3 à 0,940 g/cm3.
PCT/US2025/027108 2024-04-30 2025-04-30 Stratifié avec film multicouche orienté dans le sens machine Pending WO2025231142A1 (fr)

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645992A (en) 1967-03-02 1972-02-29 Du Pont Canada Process for preparation of homogenous random partly crystalline copolymers of ethylene with other alpha-olefins
US3914342A (en) 1971-07-13 1975-10-21 Dow Chemical Co Ethylene polymer blend and polymerization process for preparation thereof
US4076698A (en) 1956-03-01 1978-02-28 E. I. Du Pont De Nemours And Company Hydrocarbon interpolymer compositions
US4599392A (en) 1983-06-13 1986-07-08 The Dow Chemical Company Interpolymers of ethylene and unsaturated carboxylic acids
US5272236A (en) 1991-10-15 1993-12-21 The Dow Chemical Company Elastic substantially linear olefin polymers
US5278272A (en) 1991-10-15 1994-01-11 The Dow Chemical Company Elastic substantialy linear olefin polymers
US5582923A (en) 1991-10-15 1996-12-10 The Dow Chemical Company Extrusion compositions having high drawdown and substantially reduced neck-in
US5733155A (en) 1995-07-28 1998-03-31 The Whitaker Corporation Female contact
US5854045A (en) 1994-05-12 1998-12-29 The Rockefeller University Transmembrane tyrosine phosphatase and methods of use thereof
US20230347629A1 (en) * 2019-09-20 2023-11-02 Nova Chemicals (International) S.A. Stand up pouch with recycled polyethylene
WO2024086201A1 (fr) * 2022-10-18 2024-04-25 Dow Global Technologies Llc Stratifié avec film multicouche orienté dans le sens de défilement

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4076698A (en) 1956-03-01 1978-02-28 E. I. Du Pont De Nemours And Company Hydrocarbon interpolymer compositions
US4076698B1 (fr) 1956-03-01 1993-04-27 Du Pont
US3645992A (en) 1967-03-02 1972-02-29 Du Pont Canada Process for preparation of homogenous random partly crystalline copolymers of ethylene with other alpha-olefins
US3914342A (en) 1971-07-13 1975-10-21 Dow Chemical Co Ethylene polymer blend and polymerization process for preparation thereof
US4599392A (en) 1983-06-13 1986-07-08 The Dow Chemical Company Interpolymers of ethylene and unsaturated carboxylic acids
US5272236A (en) 1991-10-15 1993-12-21 The Dow Chemical Company Elastic substantially linear olefin polymers
US5278272A (en) 1991-10-15 1994-01-11 The Dow Chemical Company Elastic substantialy linear olefin polymers
US5582923A (en) 1991-10-15 1996-12-10 The Dow Chemical Company Extrusion compositions having high drawdown and substantially reduced neck-in
US5854045A (en) 1994-05-12 1998-12-29 The Rockefeller University Transmembrane tyrosine phosphatase and methods of use thereof
US5733155A (en) 1995-07-28 1998-03-31 The Whitaker Corporation Female contact
US20230347629A1 (en) * 2019-09-20 2023-11-02 Nova Chemicals (International) S.A. Stand up pouch with recycled polyethylene
WO2024086201A1 (fr) * 2022-10-18 2024-04-25 Dow Global Technologies Llc Stratifié avec film multicouche orienté dans le sens de défilement

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