# US 2013/0156983 A1 · Low Noise Flexible Barrier Films > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0156983 A1 - Document ID: US20130156983A1 - Status: Published application - Kind: A1 - Application number: 13/529,356 - Filed: 2012-06-21 - Published: 2013-06-20 - Earliest claimed: 2010-04-14 - Assignees: Avery Dennison Corporation - Inventors: Hoang T. PHAM; Thomas LANEY; Farid F. GHIAM; Kevin O. HENDERSON - Web page: https://patentgrep.com/patent/US20130156983A1 ## CPC - B32B 27/08: of synthetic resin - B32B 1/00: Layered products having a non-planar shape - B32B 27/18: characterised by the use of special additives - B32B 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers} - B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} - B32B 27/325: {comprising polycycloolefins} - B32B 2250/40: Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA - B32B 2270/00: Resin or rubber layer containing a blend of at least two different polymers - B32B 2274/00: Thermoplastic elastomer material - B32B 2307/10: having particular acoustical properties - B32B 2307/72: Density - B32B 2307/7242: Non-permeable - B32B 2307/746: Slipping, anti-blocking, low friction - B32B 2439/70: Food packaging - B32B 2439/80: Medical packaging - B32B 2535/00: Medical equipment, e.g. bandage, prostheses or catheter - Y10T 428/1383: Vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit is sandwiched between layers [continuous layer] - Y10T 428/31855: Of addition polymer from unsaturated monomers - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Various barrier films are described that include barrier layers that contain ethylene vinyl alcohol copolymers and elastomers. Polyolefin elastomers can be used such as ethylene octene copolymers. The barrier films can also include secondary barrier layers that contain one or more norbornene copolymers. ## Claims ### Claim 1 A barrier layer comprising: a blend including ethylene vinyl alcohol copolymer (EVOH) and at least one elastomer in a weight ratio of from about 99:1 to about 3:1, respectively; from about 0% to about 20% of a tie agent. ### Claim 2 (depends on 1) The barrier layer of claim 1 wherein the at least one elastomer is selected from the group consisting of an olefinic elastomer, a styrenic elastomer, a urethane elastomer, and combinations thereof. ### Claim 3 (depends on 2) The barrier layer of claim 2 wherein the elastomer is an olefinic elastomer. ### Claim 4 (depends on 3) The barrier layer of claim 3 wherein the olefinic elastomer is an ethylene octene copolymer. ### Claim 5 (depends on 4) The barrier layer of claim 4 wherein the ethylene octene copolymer has a density of from about 0.85 g/cm3 to about 0.90 g/cm3. ### Claim 6 (depends on 5) The barrier layer of claim 5 wherein the ethylene octene copolymer has a density of from about 0.853 g/cm3 to about 0.897 g/cm3. ### Claim 7 (depends on 6) The barrier layer of claim 6 wherein the ethylene octene copolymer has a density of from about 0.855 g/cm3 to about 0.895 g/cm3. ### Claim 8 (depends on 4) The barrier layer of claim 4 wherein the ethylene octene copolymer has a melt flow index (MFR) of from about 0.1 to about 100 g/10 minutes at 2.16 kg and 190° C. ### Claim 9 (depends on 8) The barrier layer of claim 8 wherein the ethylene octene copolymer has a melt flow index (MFR) of from about 0.2 to about 50 g/10 minutes at 2.16 kg and 190° C. ### Claim 10 (depends on 9) The barrier layer of claim 9 wherein the ethylene octene copolymer has a melt flow index (MFR) of from about 0.3 to about 25 g/10 minutes at 2.16 kg and 190° C. ### Claim 11 (depends on 1) The barrier layer of claim 1 wherein the tie agent includes low density polyethylene (LDPE) grafted maleic anhydride. ### Claim 12 A multilayer barrier assembly, the assembly comprising: a primary barrier layer including ethylene vinyl alcohol (EVOH) and at least one elastomer in a weight ratio of from about 99:1 to about 3:1, respectively, and from about 0% to about 20% of a tie agent; and at least one secondary barrier layer disposed along the primary barrier layer, the secondary barrier layer including at least one norbornene copolymer. ### Claim 13 (depends on 12) The multilayer barrier assembly of claim 12 wherein the at least one elastomer is selected from the group consisting of an olefinic elastomer, a styrenic elastomer, a urethane elastomer, and combinations thereof. ### Claim 14 (depends on 13) The multilayer barrier assembly of claim 13 wherein the elastomer is an olefinic elastomer. ### Claim 15 (depends on 14) The multilayer barrier assembly of claim 14 wherein the olefinic elastomer is an ethylene octene copolymer. ### Claim 16 (depends on 15) The multilayer barrier assembly of claim 15 wherein the ethylene octene copolymer has a density of from about 0.85 g/cm3 to about 0.90 g/cm3. ### Claim 17 (depends on 16) The multilayer barrier assembly of claim 16 wherein the ethylene octene copolymer has a density of from about 0.853 g/cm3 to about 0.897 g/cm3. ### Claim 18 (depends on 17) The multilayer barrier assembly of claim 17 wherein the ethylene octene copolymer has a density of 0.855 g/cm3 to about 0.895 g/cm3. ### Claim 19 (depends on 15) The multilayer barrier assembly of claim 15 wherein the ethylene octene copolymer has a melt flow index (MFR) of from about 0.1 to about 100 g/10 minutes at 2.16 kg and 190° C. ### Claim 20 (depends on 19) The multilayer barrier assembly of claim 19 wherein the ethylene octene copolymer has a melt flow index (MFR) of from about 0.2 to about 50 g/10 minutes at 2.16 kg and 190° C. ### Claim 21 (depends on 20) The multilayer barrier assembly of claim 20 wherein the ethylene octene copolymer has a melt flow index (MFR) of from about 0.3 to about 25 g/10 minutes at 2.16 kg and 190° C. ### Claim 22 (depends on 12) The multilayer barrier assembly of claim 12 wherein the tie agent includes low density polyethylene (LDPE) grafted maleic anhydride. ### Claim 23 (depends on 12) The multilayer barrier assembly of claim 12 wherein the at least one secondary barrier layer includes a first secondary barrier layer and a second secondary barrier layer disposed such that the primary barrier layer is positioned between the first and the second secondary barrier layers. ### Claim 24 (depends on 14) The multilayer barrier assembly of claim 14 wherein the at least one secondary barrier layer includes a first secondary barrier layer and a second secondary barrier layer disposed such that the primary barrier layer is positioned between the first and the second secondary barrier layers. ### Claim 25 (depends on 15) The multilayer barrier assembly of claim 15 wherein the at least one secondary barrier layer includes a first secondary barrier layer and a second secondary barrier layer disposed such that the primary barrier layer is positioned between the first and the second secondary barrier layers. ### Claim 26 (depends on 23) The multilayer barrier assembly of claim 23 wherein the first and the second secondary barrier layers are disposed immediately adjacent to the primary barrier layer. ### Claim 27 (depends on 12) The multilayer barrier assembly of claim 12 wherein the at least one secondary barrier layer further includes at least one elastomer. ### Claim 28 (depends on 14) The multilayer barrier assembly of claim 14 wherein the at least one secondary barrier layer further includes at least one elastomer. ### Claim 29 (depends on 15) The multilayer barrier assembly of claim 15 wherein the at least one secondary barrier layer further includes at least one elastomer. ### Claim 30 (depends on 27) The multilayer barrier assembly of claim 27 wherein the at least one elastomer is selected from the group consisting of an olefinic elastomer, a styrenic elastomer, a urethane elastomer, and combinations thereof. ### Claim 31 (depends on 27) The multilayer barrier assembly of claim 27 wherein the at least one elastomer is present in an amount of from about 1% to about 50% based upon the total weight of the norbornene copolymer and the at least one elastomer. ### Claim 32 (depends on 12) The multilayer barrier assembly of claim 12 wherein the at least one secondary barrier layer further includes from 0% to about 30% of a tie agent. ### Claim 33 (depends on 32) The multilayer barrier assembly of claim 32 wherein the tie agent includes low density polyethylene (LDPE) grafted maleic anhydride. ### Claim 34 (depends on 12) The multilayer barrier assembly of claim 12 further comprising: at least one skin layer comprising an RF weldable agent. ### Claim 35 (depends on 14) The multilayer barrier assembly of claim 14 further comprising: at least one skin layer comprising an RF weldable agent. ### Claim 36 (depends on 15) The multilayer barrier assembly of claim 15 further comprising: at least one skin layer comprising an RF weldable agent. ### Claim 37 (depends on 34) The multilayer barrier assembly of claim 34 wherein the RF weldable agent is selected from the group consisting of ethylene vinyl acetate (EVA), ethylene butyl acrylate (EBA), ethyl methyl acrylate (EMA), and combinations thereof. ### Claim 38 (depends on 34) The multilayer barrier assembly of claim 34, wherein the at least one skin layer includes at least one of a slip agent, an anti-block agent, and combinations thereof. ### Claim 39 (depends on 38) The multilayer barrier assembly of claim 38 wherein the at least one skin layer includes from about 0.1% to about 5% of a slip agent. ### Claim 40 (depends on 38) The multilayer barrier assembly of claim 38 wherein the at least one skin layer includes from about 0.1% to about 2% of an anti-block agent. ### Claim 41 (depends on 38) The multilayer barrier assembly of claim 38 wherein the slip agent is selected from the group consisting of erucamide, beheamide, secondary amides and combinations thereof. ### Claim 42 (depends on 41) The multilayer barrier assembly of claim 41 wherein the slip agent includes at least one secondary amide. ### Claim 43 (depends on 38) The multilayer barrier assembly of claim 38 wherein the anti-block agent is selected from the group consisting of silica, talc, calcium carbonate, and combinations thereof. ### Claim 44 (depends on 34) The multilayer barrier assembly of claim 34 wherein the at least one skin layer is disposed immediately adjacent to the at least one secondary barrier layer. ### Claim 45 (depends on 34) The multilayer barrier assembly of claim 34 wherein the at least one skin layer includes a first skin layer and a second skin layer. ### Claim 46 (depends on 45) The multilayer barrier assembly of claim 45 wherein the first skin layer is disposed adjacent to the first secondary barrier layer and the second skin layer is disposed adjacent to the second secondary barrier layer. ### Claim 47 (depends on 12) The multilayer barrier assembly of claim 12 wherein the norbornene copolymer is a cyclic olefin copolymer (COC). ### Claim 48 (depends on 14) The multilayer barrier assembly of claim 14 wherein the norbornene copolymer is a cyclic olefin copolymer (COC). ### Claim 49 (depends on 15) The multilayer barrier assembly of claim 15 wherein the norbornene copolymer is a cyclic olefin copolymer (COC). ### Claim 50 An article comprising a film interconnected to define a cavity, the film having at least one layer comprising: ethylene vinyl alcohol copolymer (EVOH) and at least one elastomer in a weight ratio of from about 99:1 to about 3:1, respectively. ### Claim 51 (depends on 50) The article of claim 50 wherein the at least one elastomer is selected from the group consisting of an olefinic elastomer, a styrenic elastomer, a urethane elastomer, and combinations thereof. ### Claim 52 (depends on 51) The article of claim 51 wherein the elastomer is an olefinic elastomer. ### Claim 53 (depends on 52) The article of claim 52 wherein the olefinic elastomer is an ethylene octene copolymer. ### Claim 54 (depends on 53) The article of claim 53 wherein the ethylene octene copolymer has a density of from about 0.85 g/cm3 to about 0.90 g/cm3. ### Claim 55 (depends on 53) The article of claim 53 wherein the ethylene octene copolymer has a melt flow index (MFR) of from about 0.1 to about 100 g/10 minutes at 2.16 kg and 190° C. ### Claim 56 An article comprising a multilayer film interconnected to define a cavity, the multilayer film comprising: a primary barrier layer including ethylene vinyl alcohol (EVOH) and at least one elastomer in a weight ratio of from about 99:1 to about 3:1, respectively; and at least one secondary barrier layer disposed along the primary barrier layer, the secondary barrier layer including at least one norbornene copolymer. ### Claim 57 (depends on 56) The article of claim 56 wherein the at least one elastomer is selected from the group consisting of an olefinic elastomer, a styrenic elastomer, a urethane elastomer, and combinations thereof. ### Claim 58 (depends on 56) The article of claim 56 wherein the elastomer is an olefinic elastomer. ### Claim 59 (depends on 58) The article of claim 58 wherein the olefinic elastomer is an ethylene octene copolymer. ### Claim 60 (depends on 59) The article of claim 59 wherein the ethylene octene copolymer has a density of from about 0.85 g/cm3 to about 0.90 g/cm3. ### Claim 61 (depends on 59) The article of claim 59 wherein the ethylene octene copolymer has a melt flow index (MFR) of from about 0.1 to about 100 g/10 minutes at 2.16 kg and 190° C. ### Claim 62 (depends on 56) The article of claim 56 wherein the at least one secondary barrier layer includes a first secondary barrier layer and a second secondary barrier layer disposed such that the primary barrier layer is positioned between the first and the second secondary barrier layers. ### Claim 63 (depends on 62) The article of claim 62 wherein the first and the second secondary barrier layers are disposed immediately adjacent to the primary barrier layer. ### Claim 64 (depends on 56) The article of claim 56 wherein the at least one secondary barrier layer further includes at least one elastomer. ### Claim 65 (depends on 64) The article of claim 64 wherein the at least one elastomer is selected from the group consisting of an olefinic elastomer, a styrenic elastomer, a urethane elastomer, and combinations thereof. ### Claim 66 (depends on 64) The article of claim 64 wherein the at least one elastomer is present in an amount of from about 1% to about 50% based upon the total weight of the norbornene copolymer and the at least one elastomer. ### Claim 67 (depends on 56) The article of claim 56 further comprising: at least one skin layer comprising an RF weldable agent. ### Claim 68 (depends on 58) The article of claim 58 further comprising: at least one skin layer comprising an RF weldable agent. ### Claim 69 (depends on 59) The article claim 59 further comprising: at least one skin layer comprising an RF weldable agent. ### Claim 70 (depends on 67) The article of claim 67 wherein the RF weldable agent is selected from the group consisting of ethylene vinyl acetate (EVA), ethylene butyl acrylate (EBA), ethyl methyl acrylate (EMA), and combinations thereof. ### Claim 71 (depends on 67) The article of claim 67 wherein the at least one skin layer includes at least one of a slip agent, an anti-block agent, and combinations thereof. ### Claim 72 (depends on 71) The article of claim 71 wherein the at least one skin layer includes a slip agent. ### Claim 73 (depends on 72) The article of claim 72 wherein the slip agent includes at least one secondary amine. ### Claim 74 (depends on 56) The article of claim 56 wherein the norbornene copolymer is a cyclic olefin copolymer (COC).