# US 2022/0034040 A1 · Recyclable paper barrier laminate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0034040 A1 - Document ID: US20220034040A1 - Status: Published application - Kind: A1 - Application number: 17/386,586 - Filed: 2021-07-28 - Published: 2022-02-03 - Earliest claimed: 2020-07-30 - Assignees: The Procter & Gamble Company - Applicants: The Procter & Gamble Company - Inventors: Emily Charlotte Boswell; Pier-Lorenzo Caruso; Uwe Bolz - Web page: https://patentgrep.com/patent/US20220034040A1 ## CPC - B32B 5/16: characterised by features of a layer formed of particles, e.g. chips, powder {or granules (layer formed of natural mineral particles B32B19/00; layer being formed of wood fibres, chips or particles B32B21/02)} - D21H 19/84: on both sides of the substrate - B32B 19/00: Layered products comprising {a layer of} natural mineral fibres or particles, e.g. asbestos, mica - B32B 23/06: of paper or cardboard - B32B 23/12: next to a particulate layer - B32B 27/10: of paper or cardboard - B32B 27/14: next to a particulate layer - B32B 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers} - B32B 27/308: {comprising acrylic (co)polymers} - D21F 11/002: {by using a foamed suspension} - D21H 19/12: applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds - D21H 19/40: siliceous, e.g. clays - D21H 19/60: Polyalkenylalcohols; Polyalkenylethers; Polyalkenylesters - D21H 27/10: Packing paper (packaging materials of special type or form B65D65/38) - B32B 2250/04: 4 layers - B32B 2250/42: Alternating layers, e.g. ABAB(C), AABBAABB(C) - B32B 2255/28: Multiple coating on one surface - B32B 2260/025: Particulate layer - B32B 2260/028: Paper layer - B32B 2272/00: Resin or rubber layer comprising scrap, waste or recycling material - B32B 2307/4023: on the layer surface, e.g. ink - B32B 2307/7163: Biodegradable - B32B 2307/718: Weight, e.g. weight per square meter - B32B 2307/7246: Water vapor barrier - B32B 2307/732: Dimensional properties - B32B 2439/00: Containers; Receptacles - B32B 2439/70: Food packaging - B32B 2439/80: Medical packaging - B32B 2554/00: Paper of special types, e.g. banknotes - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - D21H: PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR - D21F: PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON ## Abstract A recyclable paper laminate comprising a water-dispersible barrier against any permeation. ## Claims ### Claim 1 A recyclable barrier paper laminate comprising: a) a recyclable paper layer having an outer surface and an inner surface b) a first water-soluble polymeric layer having an outer surface and an inner surface, said outer surface disposed on said inner surface of said paper layer c) a water-dispersible barrier layer having an outer surface and an inner surface, said outer surface disposed on said inner surface of said water-soluble polymeric layer d) a second water-soluble polymeric layer having an outer surface and an inner surface, said outer surface disposed on said inner surface of said water-dispersible barrier layer ### Claim 2 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the grammage of the recyclable paper barrier laminate is from about 20 to about 1000 g/m2, preferably from about 20 to about 200 g/m2. ### Claim 3 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the WVTR of the recyclable paper barrier laminate is from about 0.1 g/m2/day to about 100 g/m2/day when measured at 40° C. temperature and 50% relative humidity according to the ASTM method F1249-13. ### Claim 4 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the WVTR of the recyclable paper barrier laminate is from about 0.1 g/m2/day to about 200 g/m2/day when measured at 38° C. temperature and 90% relative humidity according to the ASTM method F1249-13. ### Claim 5 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the WVTR of the recyclable paper barrier laminate is from about 0.1 g/m2/day to about 200 g/m2/day when measured at 40° C. temperature and 50% relative humidity according to the ASTM method F1249-13, even after mechanical stress. ### Claim 6 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the WVTR of the recyclable paper barrier laminate is from about 0.1 g/m2/day to about 200 g/m2/day when measured at 40° C. temperature and 50% relative humidity according to the ASTM test method F1249-13, even after exposure to several variation cycles of the environmental relative humidity between 10% and 90%. ### Claim 7 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the recyclable paper barrier laminate has at least 60% biodegradation within 60 days in the OECD 301B test. ### Claim 8 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the paper barrier laminate is recyclable and exhibits a recyclable percentage of at least 50 percent as determined by the test method PTS-RH:021/97 (draft oct. 2019). ### Claim 9 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the paper barrier laminate is recyclable and exhibits an overall “pass” result, as determined by the test method PTS-RH:021/97 (draft oct. 2019). ### Claim 10 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the recyclable paper barrier laminate comprises between about 50 percent and about 100 percent, by weight, of natural fibers, preferably between about 65 percent and about 99 percent, by weight, of natural fibers, more preferably between about 75 percent and about 95 percent, by weight, of natural fibers. ### Claim 11 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the recyclable paper includes natural fibers comprising at least one of cellulose-based fibers, bamboo fibers, cotton, abaca, kenaf, sabai grass, flax, esparto grass, straw, jute, hemp, bagasse, milkweed floss fibers, pineapple leaf fibers, wood fibers, pulp fibers, or combinations thereof. ### Claim 12 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the recyclable paper comprises at least one of natural fibers comprising wood fibers or pulp fibers. ### Claim 13 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the recyclable paper comprises at least one recycled natural fibers as determined by visual inspection. ### Claim 14 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the recyclable paper is at least one of sized, machine-glazed on at least one surface, glassine, or vellum paper. ### Claim 15 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the recyclable paper is made via foam-forming process, a paper-making process replacing water by water-based foam. ### Claim 16 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the average thickness of the water-soluble polymeric layers is from about 1 μm to about 200 μm. ### Claim 17 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein at least one of the first or the second water-soluble polymeric layers comprises different water-soluble polymers. ### Claim 18 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein at least one of the first or the second water-soluble polymeric layers comprise more than one water-soluble polymeric sublayer. ### Claim 19 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the water-soluble polymeric layers comprise at least one water-soluble polymer. ### Claim 20 (depends on 19) The water-soluble polymeric layers of claim 19, wherein the water-soluble polyvinyl alcohol is either a homopolymer or copolymer and either partially or fully hydrolysed. ### Claim 21 (depends on 19) The water-soluble polymeric layers of claim 19, wherein the water-soluble polyvinyl alcohol has an average molecular weight from about 20,000 Da to about 150,000 Da. ### Claim 22 (depends on 19) The water-soluble polymeric layers of claim 19, wherein the water-soluble polyvinyl alcohol is a homopolymer with a degree of hydrolyzation from about 70% to about 100%. ### Claim 23 (depends on 19) The water-soluble polymeric layers of claim 19, wherein the water-soluble polyethylene oxide has an average molecular weight from about 50,000 Da to about 400,000 Da. ### Claim 24 (depends on 19) The water-soluble polymeric layers of claim 19, wherein the water-soluble methylcellulose has an average molecular weight from about 10,000 Da to about 100,000 Da. ### Claim 25 (depends on 19) The water-soluble polymeric layers of claim 19, wherein the water-soluble methylcellulose is methoxyl substituted from about 18% to about 32% and hydroxy-propoxyl substituted from about 4% to about 12%. ### Claim 26 (depends on 19) The water-soluble polymeric layers of claim 19, wherein the water-soluble sodium alginate has an average molecular weight from about 10,000 Da to about 240,000 Da. ### Claim 27 (depends on 1) The water-soluble polymeric layers of claim 1, wherein the water-soluble polymeric layers comprise at least one plasticizer. ### Claim 28 (depends on 27) The water-soluble polymeric layers of claim 27, wherein the plasticizer is at least one of water, glycerol, sorbitol, propylene glycol (PG), trimethylene glycol (PDO), trimethylolpropane (TMP), methylpropanediol (MPD), 2-methyl-1,3 propanediol (MPO), or mixtures thereof. ### Claim 29 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the water-dispersible barrier layer is distinct from the water-soluble polymeric layers observed via optical microscopy or scanning electron microscopy. ### Claim 30 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the average thickness of the water-dispersible barrier layer is from about 0.1 μm to about 20 μm. ### Claim 31 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the water-dispersible barrier layer comprises more than one water-dispersible barrier sublayer. ### Claim 32 (depends on 1) The recyclable paper barrier laminate of claim 1, wherein the water-dispersible barrier layer comprises hydrophilic nanoplatelets. ### Claim 33 (depends on 32) The recyclable paper barrier laminate of claim 32, wherein the average aspect ratio of the hydrophilic nanoplatelets is greater than about 100. ### Claim 34 (depends on 32) The recyclable paper barrier laminate of claim 32, wherein the average aspect ratio of the hydrophilic nanoplatelets is from about 100 to about 20,000. ### Claim 35 (depends on 32) The recyclable paper barrier laminate of claim 32, wherein the hydrophilic nanoplatelets are at least one of clay nanoplatelets or graphene oxide nanoplatelets. ### Claim 36 (depends on 35) The recyclable paper barrier laminate of claim 35, wherein the clay nanoplatelets are smectites. ### Claim 37 (depends on 35) The recyclable paper barrier laminate of claim 35, wherein the clay nanoplatelets are purified cation-exchanged bentonite. ### Claim 38 (depends on 1) The recyclable paper barrier laminate according to claim 1, wherein the recyclable paper barrier laminate is comprised in the package material for one or more absorbent articles. ### Claim 39 (depends on 1) Method of making a recyclable paper barrier laminate of claim 1 comprising: a) applying a first aqueous solution of a water-soluble polymeric composition onto the surface of a removeable flat carrier, such as PET films or steel belts b) removing the water from the first aqueous solution of a water-soluble polymeric composition to obtain a first water-soluble polymeric layer c) applying an aqueous dispersion of hydrophilic nanoplatelets onto the outer surface of the first water-soluble polymeric layer d) removing the water from the aqueous dispersion of hydrophilic nanoplatelets to obtain a water-dispersible barrier layer e) applying a second aqueous solution of a water-soluble polymeric composition onto the inner surface of the recyclable paper layer f) combining the outer surface of the water-dispersible barrier layer onto the second aqueous solution of a water-soluble polymeric composition g) removing the water from the second aqueous solution of a water-soluble polymeric composition to obtain a second water-soluble polymeric layer h) removing the flat carrier from the resulting recyclable paper barrier laminate. ### Claim 40 (depends on 1) Method of making a recyclable paper barrier laminate of claim 1 comprising: a) applying a first aqueous solution of a water-soluble polymeric composition onto the inner surface of the recyclable paper layer b) removing the water from the first aqueous solution of a water-soluble polymeric composition to obtain a first water-soluble polymeric layer c) applying an aqueous dispersion of hydrophilic nanoplatelets onto the inner surface of the first water-soluble polymeric layer d) removing the water from the aqueous dispersion of hydrophilic nanoplatelets to obtain a water-dispersible barrier layer e) applying a second aqueous solution of a water-soluble polymeric composition onto the inner surface of the recyclable paper layer f) removing the water from the second aqueous solution of a water-soluble polymeric composition to obtain a second water-soluble polymeric layer. ### Claim 41 (depends on 39) The method of claim 39, wherein the water transferred from the applied aqueous nanoplatelets dispersion onto the water-soluble polymeric layer is below the dissolution point of the water-soluble polymeric layer in water. ### Claim 42 (depends on 39) The method of claim 39, wherein the water transferred from the applied aqueous polymeric solution onto the water-dispersible nanoplatelets layer is below the dispersion point of the water-dispersible nanoplatelets layer in water. ### Claim 43 (depends on 39) The method of claim 39, wherein the aqueous polymeric solution is applied via coating processes. ### Claim 44 (depends on 39) The method of claim 39, wherein the aqueous nanoplatelets dispersion is applied via coating processes.