# US 11,897,231 B2 · Package film having foil layers with intervening multilayer structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,897,231 B2 - Document ID: US11897231B2 - Status: Granted - Kind: B2 - Application number: 16/309,538 - Filed: 2016-06-15 - Published: 2019-10-17 - Granted: 2024-02-13 - Earliest claimed: 2016-06-15 - Assignees: Amcor Flexibles North America, Inc. - Applicants: Amcor Flexibles North America, Inc. - Inventors: Ross K Gruetzmacher; Brent G. Martins - Web page: https://patentgrep.com/patent/US11897231B2 ## CPC - B32B 15/085: comprising polyolefins - B32B 7/022: Mechanical properties - B32B 7/12: using interposed adhesives or interposed materials with bonding properties - B32B 15/08: of synthetic resin - B32B 15/082: comprising vinyl resins; comprising acrylic resins - B32B 15/088: comprising polyamides - B32B 15/09: comprising polyesters - B32B 15/20: comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)} - B32B 27/08: of synthetic resin - B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} - B32B 27/34: comprising polyamides - B32B 27/36: comprising polyesters - B32B 29/002: {as the main or only constituent of a layer, which is next to another layer of the same or of a different material (next to a layer of a particular substance B32B9/06; next to a bituminous or tarry layer B32B11/06; next to a water-setting substance layer B32B13/08; next to a metal layer B32B15/12; next to a glass layer B32B17/065; next to a layer formed of natural mineral fibres or particles B32B19/046; next to a wood layer B32B21/06; next to a cellulosic plastic layer B32B23/06; next to a natural or synthetic rubber layer B32B25/06; next to a synthetic resin layer B32B27/10)} - B32B 37/12: characterised by using adhesives - B65D 65/14: with areas coated with adhesive - H10W 72/00: Interconnections or connectors in packages - B32B 2250/05: 5 or more layers - B32B 2255/06: on metal layer - B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer - B32B 2255/26: Polymeric coating - B32B 2270/00: Resin or rubber layer containing a blend of at least two different polymers - B32B 2307/31: Heat sealable - B32B 2307/518: bi-axially - B32B 2307/54: Yield strength; Tensile strength - B32B 2307/5825: Tear resistant - B32B 2307/732: Dimensional properties - B32B 2309/105: Thickness - B32B 2311/24: Aluminium - B32B 2435/02: for containers - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A package film is described. The package film comprises a first foil layer having a thickness of 0.5 mil or less but greater than 0 mil and a second foil layer having a thickness of 0.5 mil or less but greater than 0 mil. The package film also comprises a multilayer structure positioned between the first foil layer and the second foil layer. The multilayer structure has a thickness of from 0.75 mil to 2 mil and comprises (a) a high modulus layer having a secant modulus in each of the machine direction and the transverse direction of greater than 120,000 psi or having an elongation at break in each of the machine direction and the transverse direction of less than 150% and (b) a bulk layer comprising polyethylene, polypropylene, ionomer, or blends thereof. The package film further comprises a sealant film, and the sealant film is positioned interior the second foil layer. Various embodiments of the package film are also described. ## Claims ### Claim 1 A package film comprising a first foil layer having a thickness of 0.5 mil or less but greater than 0 mil, a second foil layer having a thickness of 0.5 mil or less but greater than 0 mil, a multilayer structure positioned between the first foil layer and the second foil layer, wherein the multilayer structure has a thickness of from 0.75 mil to 2 mil and comprises (a) a high modulus layer having a secant modulus in each of the machine direction and the transverse direction of greater than 120,000 psi or having an elongation at break in each of the machine direction and the transverse direction of less than 150% and (b) a multilayer bulk layer comprising a polyethylene layer, the multilayer bulk layer having a lower modulus than the high modulus layer; an adhesive layer, the adhesive layer directly attached to the high modulus layer and one of the first foil layer or the second foil layer, and a sealant film, wherein the sealant film is positioned interior the second foil layer. ### Claim 2 (depends on 1) The package film of claim 1, wherein the first foil layer has a thickness of from 0.25 mil to 0.5 mil and the second foil layer has a thickness of from 0.25 mil to 0.5 mil. ### Claim 3 (depends on 1) The package film of claim 1, wherein the high modulus layer has a thickness of from 0.35 mil to 1 mil. ### Claim 4 (depends on 1) The package film of claim 1, wherein the high modulus layer comprises biaxially oriented nylon film, biaxially oriented polyethylene terephthalate film, or biaxially oriented polypropylene film. ### Claim 5 (depends on 1) The package film of claim 1, wherein the multilayer bulk layer has a thickness of from 0.4 mil to 1 mil. ### Claim 6 (depends on 1) The package film of claim 1, wherein the multilayer bulk layer further comprises an ethylene acid copolymer layer. ### Claim 7 (depends on 1) The package film of claim 1, wherein the sealant film comprises a blown film sealant or an extrusion coated sealant and has a thickness of from 0.5 mil to 3 mil. ### Claim 8 (depends on 7) The package film of claim 7, wherein the sealant film has a thickness of from 0.75 mil to 1.5 mil. ### Claim 9 (depends on 1) The package film of claim 1, wherein the high modulus layer is positioned exterior the multilayer bulk layer and the multilayer bulk layer is positioned interior the high modulus layer. ### Claim 10 (depends on 1) The package film of claim 1, wherein the multilayer bulk layer is positioned exterior the high modulus layer and the high modulus layer is positioned interior the multilayer bulk layer. ### Claim 11 (depends on 1) A die cut lid comprising the package film of claim 1. ### Claim 12 (depends on 11) The die cut lid of claim 11, wherein the die cut lid is embossed. ### Claim 13 A package film comprising: a first foil layer having a thickness of from 0.25 mil to 0.5 mil, a second foil layer having a thickness of from 0.25 mil to 0.5 mil, a multilayer structure positioned between the first foil layer and the second foil layer, wherein the multilayer structure has a thickness of from 0.75 mil to 2 mil and comprises (a) a high modulus layer comprising a biaxially oriented nylon film or a biaxially oriented polyethylene terephthalate film, the high modulus layer having a secant modulus in each of the machine direction and the transverse direction of greater than 120,000 psi or having an elongation at break in each of the machine direction and the transverse direction of less than 150% and (b) a multilayer bulk layer comprising at least: a low density polyethylene layer and an ethylene acid copolymer layer; wherein the high modulus layer is positioned exterior the multilayer bulk layer and the multilayer bulk layer is positioned interior the high modulus layer; an adhesive layer positioned between the first foil layer and the high modulus layer, wherein the adhesive layer is directly attached to the first foil layer and the high modulus layer; and an extrusion coated sealant, wherein the extrusion coated sealant is positioned interior the second foil layer. ### Claim 14 (depends on 13) The package film of claim 13, wherein the high modulus layer has a thickness of from 0.35 mil to 1 mil and comprises biaxially oriented polyethylene terephthalate film. ### Claim 15 (depends on 13) The package film of claim 13, wherein the multilayer bulk layer has a thickness of from 0.4 mil to 1 mil. ### Claim 16 (depends on 13) The package film of claim 13, wherein the extrusion coated sealant has a thickness of from 0.75 mil to 1.5 mil. ### Claim 17 (depends on 13) The package film of claim 13, wherein the first foil layer is coated with primer or indicia. ### Claim 18 (depends on 13) A die cut lid comprising the package film of claim 13. ### Claim 19 (depends on 18) The die cut lid of claim 18, wherein the die cut lid is embossed. ### Claim 20 A package film comprising a first foil layer having a thickness of from 0.25 mil to 0.5 mil, a second foil layer having a thickness of from 0.25 mil to 0.5 mil, a multilayer structure positioned between the first foil layer and the second foil layer, wherein the multilayer structure has a thickness of from 0.75 mil to 2 mil and comprises (a) a high modulus layer comprising a biaxially oriented nylon film or a biaxially oriented polyethylene terephthalate film, the high modulus layer having a secant modulus in each of the machine direction and the transverse direction of greater than 120,000 psi or having an elongation at break in each of the machine direction and the transverse direction of less than 150% and (b) a multilayer bulk layer comprising processing aid, low density polyethylene (LDPE) and ethylene acrylic acid copolymer (EAA); wherein the high modulus layer is positioned interior the multilayer bulk layer and the multilayer bulk layer is positioned exterior the high modulus layer; an adhesive layer positioned between the second foil layer and the high modulus layer, wherein the adhesive layer is directly attached to the second foil layer and the high modulus layer; and an extrusion coated sealant, wherein the extrusion coated sealant is positioned interior the second foil layer.