# US 12,110,371 B2 · Oriented polyethylene films and a method for making the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,110,371 B2 - Document ID: US12110371B2 - Status: Granted - Kind: B2 - Application number: 17/206,918 - Filed: 2021-03-19 - Published: 2021-07-08 - Granted: 2024-10-08 - Earliest claimed: 2019-09-17 - Assignees: Dow Global Technologies LLC - Applicants: Dow Global Technologies LLC - Inventors: Yijian Lin; Mehmet Demirors; Jianping Pan; Xiao B. Yun - Web page: https://patentgrep.com/patent/US12110371B2 ## CPC - C08J 5/18: Manufacture of films or sheets - B29C 48/08: flexible, e.g. films - B29C 48/21: the layers being joined at their surfaces - B32B 27/08: of synthetic resin - B32B 27/16: specially treated, e.g. irradiated - B32B 27/205: {the fillers creating voids or cavities, e.g. by stretching} - B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} - C08L 23/06: Polyethylene - B29C 48/0018: {combined with shaping by orienting, stretching or shrinking, e.g. film blowing (B29C48/0017 takes precedence)} - B29K 2023/0625: {LLDPE, i.e. linear low density polyethylene} - B32B 2250/242: All polymers belonging to those covered by group B32B27/32 - B32B 2307/518: bi-axially - B32B 2307/54: Yield strength; Tensile strength - B32B 2307/72: Density - C08J 2323/06: Polyethene - C08J 2423/06: Polyethene - C08L 2203/16: used for films - C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure - C08L 2314/02: Ziegler natta catalyst - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS ## Abstract A first oriented film comprising a first polyethylene composition which comprises: from 20 to 50 wt % of a first linear low density polyethylene polymer having a density greater than 0.925 g/cc and an I2 lower than 2 g/10 min; and from 80 to 50 wt % of a second linear low density polyethylene polymer having a density lower than or equal to 0.925 g/cc and an I2 greater than or equal to 2 g/10 min; wherein the first polyethylene composition has an I2 from 0.5 to 10 g/10 min and a density from 0.910 to 0.940 g/cc is provided. ## Claims ### Claim 1 An oriented film comprising a polyethylene composition comprising: 75 to less than 100 wt % of a first polyethylene composition; and greater than 0 to 25 wt % of at least one resin selected from the group consisting of linear low density polyethylene, low density polyethylene, ethylene copolymers, propylene copolymers and high density polyethylene; wherein the first polyethylene composition comprises from 20 to 50 wt % of a first linear low density polyethylene polymer having a density greater than 0.925 g/cc and an I2 lower than 2 g/10 min; and from 80 to 50 wt % of a second linear low density polyethylene polymer having a density lower than 0.925 g/cc and an I2 greater than 2 g/10 min; wherein the first polyethylene composition has an I2 from 0.5 to 10 g/10 min and a density from 0.910 to 0.940 g/cc. ### Claim 2 (depends on 1) The oriented film according to claim 1, wherein the first polyethylene composition has an MWHDF>95 greater than 135 kg/mol and IHDF>95 greater than 42 kg/mol. ### Claim 3 (depends on 1) The oriented film according to claim 1, wherein the oriented film is oriented below the melting point of the first polyethylene composition. ### Claim 4 (depends on 1) The oriented film according to claim 1, wherein the first polyethylene composition comprises from 20 to 45 wt. % of the first linear low density polyethylene polymer. ### Claim 5 (depends on 1) The oriented film according to claim 1, wherein the at least one resin is selected from the group consisting of low density polyethylene, ethylene copolymers, propylene copolymers and high density polyethylene. ### Claim 6 (depends on 1) The oriented film according to claim 1, wherein the at least one resin is a propylene copolymer. ### Claim 7 (depends on 1) The oriented film according to claim 1, wherein the polyethylene composition further comprises a second polyethylene composition, wherein the second polyethylene composition comprises from 50 to 80 wt % of a third linear low density polyethylene polymer having a density greater than 0.925 g/cc and an I2 less than 2 g/10 min; and from 50 to 20 wt % of a fourth linear low density polyethylene polymer having a density lower than 0.920 g/cc and an I2 greater than 2 g/10 min; wherein the second polyethylene composition has an I2 from 0.5 to 10 g/10 min and a density from 0.910 to 0.940 g/cc. ### Claim 8 (depends on 1) The oriented film according to claim 1, wherein the oriented film is a biaxially oriented film. ### Claim 9 (depends on 8) The biaxially oriented film according to claim 8 which has been oriented via a sequential orientation process with an MD draw ratio greater than 3 and a TD draw ratio greater than 5. ### Claim 10 (depends on 8) The biaxially oriented film according to claim 8 which has been oriented via a simultaneous orientation process with an MD draw ratio greater than 4 and a TD draw ratio greater than 4. ### Claim 11 (depends on 1) A co-extruded film comprising at least one film layer comprising the oriented film according to claim 1. ### Claim 12 (depends on 1) The oriented film according to claim 1, wherein the oriented film exhibits one or more of the following properties: ultimate tensile strength averaged in MD and TD, measured according to ASTM D882, greater than or equal to 40 MPa; and 2% secant modulus averaged in MD and TD, measured according to ASTM D882, greater than or equal to 350 MPa.