# US 8,541,074 B2 · Packaging materials with enhanced thermal-insulating performance > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,541,074 B2 - Document ID: US8541074B2 - Status: Granted - Kind: B2 - Application number: 13/080,064 - Filed: 2011-04-05 - Published: 2011-09-01 - Granted: 2013-09-24 - Earliest claimed: 2009-05-05 - Assignees: MeadWestvaco Corporation - Applicants: Vladislav Babinsky; Sven Samuel Arenander; Dobridge Celeste Newman; Bruce W. Babcock; David H. Hawes - Inventors: Vladislav Babinsky; Sven Samuel Arenander; Dobridge Celeste Newman; Bruce W. Babcock; David H. Hawes - Web page: https://patentgrep.com/patent/US8541074B2 ## CPC - 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)} - B31B 50/62: by adhesives - B32B 3/26: characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids {(foam layer B32B5/18; layer of synthetic resin characterised by fillers that create voids or cavities B32B27/205); characterised by an apertured layer} - 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)} - B32B 5/20: foamed in situ - B32B 9/02: comprising animal or vegetable substances {, e.g. cork, bamboo, starch} - B32B 9/06: of paper or cardboard - B32B 15/12: of paper or cardboard - B32B 23/06: of paper or cardboard - B32B 27/10: of paper or cardboard - B32B 27/18: characterised by the use of special additives - B32B 27/205: {the fillers creating voids or cavities, e.g. by stretching} - B32B 27/22: using plasticisers - B32B 27/302: {comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers} - 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 29/005: {next to another layer of paper or cardboard layer} - B32B 29/007: {next to a foam layer} - B32B 29/02: next to a fibrous or filamentary layer - B32B 29/04: next to a particulate layer - B65D 3/06: essentially conical or frusto-conical - B65D 3/28: Other details of walls - B65D 81/3874: {formed of different materials, e.g. laminated or foam filling between walls} - B32B 2255/12: on paper layer - B32B 2255/26: Polymeric coating - B32B 2260/025: Particulate layer - B32B 2260/046: Synthetic resin - B32B 2262/06: Vegetal fibres - B32B 2264/06: Vegetal particles - B32B 2266/0207: Materials belonging to B32B25/00 - B32B 2266/0228: Aromatic vinyl resin, e.g. styrenic (co)polymers - B32B 2266/0242: Acrylic resin - B32B 2266/025: Polyolefin - B32B 2270/00: Resin or rubber layer containing a blend of at least two different polymers - B32B 2307/304: Insulating - B32B 2307/7163: Biodegradable - B32B 2307/7246: Water vapor barrier - B32B 2439/70: Food packaging - Y02A 40/90: in food processing or handling, e.g. food conservation - Y10T 156/10: Methods of surface bonding and/or assembly therefor - Y10T 428/13: Hollow or container type article [e.g., tube, vase, etc.] - Y10T 428/1303: Paper containing [e.g., paperboard, cardboard, fiberboard, etc.] - Y10T 428/1352: Polymer or resin containing [i.e., natural or synthetic] - Y10T 428/1393: Multilayer [continuous layer] - Y10T 428/24851: Intermediate layer is discontinuous or differential - Y10T 428/2495: Thickness [relative or absolute] - Y10T 428/249953: Composite having voids in a component [e.g., porous, cellular, etc.] - Y10T 428/249962: Void-containing component has a continuous matrix of fibers only [e.g., porous paper, etc.] - Y10T 428/249974: Metal- or silicon-containing element - Y10T 428/253: Cellulosic [e.g., wood, paper, cork, rayon, etc.] - Y10T 428/26: Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension - Y10T 428/31703: Next to cellulosic - Y10T 428/31895: Paper or wood - Y10T 428/31899: Addition polymer of hydrocarbon[s] only - Y10T 428/31902: Monoethylenically unsaturated - Y10T 428/31975: Of cellulosic next to another carbohydrate - Y10T 428/31982: Wood or paper - Y10T 428/31993: Of paper - Y10T 428/31996: Next to layer of metal salt [e.g., plasterboard, etc.] - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - B31B: MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER (making wound articles, e.g. wound tubes, B31C; combined making and filling B65B) - 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 - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A packaging material including a paper-based substrate having a first surface and a second surface and a thermal-insulating composition on the first surface of the substrate, wherein the thermal-insulating composition includes, based on the total weight of the composition, filler in an amount of 20% to 70% by weight, organic binder in an amount of 15% to 70% by weight, and plasticizer in an amount of 0.5% to 10% by weight. ## Claims ### Claim 1 A packaging material comprising: (A) a paper-based substrate including a first surface and a second surface; and (B) a thermal-insulating composition on the first surface of the substrate, wherein the thermal-insulating composition comprises, based on total weight of the composition: (a) filler in an amount of 10% to 70% by weight; (b) organic binder in an amount of 15% to 70% by weight; and (c) plasticizer. ### Claim 2 (depends on 1) The packaging material of claim 1, wherein the filler comprises, based on total weight of the filler: (i) inorganic filler in an amount of 0% to 90% by weight; and (ii) organic filler in an amount of 10% to 100% by weight. ### Claim 3 (depends on 1) The packaging material of claim 1, wherein the filler comprises, based on total weight of the filler: (i) inorganic filler in an amount of 40% to 90% by weight; and (ii) organic filler in an amount of 10% to 60% by weight. ### Claim 4 (depends on 1) The packaging material of claim 1, wherein the thermal-insulating composition is applied onto the substrate in a form of coalesced droplets, longitudinally-extending sinuous strands, or combinations thereof. ### Claim 5 (depends on 1) The packaging material of claim 1, wherein the thermal-insulating composition further comprises borax. ### Claim 6 (depends on 1) The packaging material of claim 1, wherein the thermal-insulating composition comprises sodium silicate in an amount of 1% to 15% by weight based on total weight of the composition. ### Claim 7 (depends on 1) The packaging material of claim 1, wherein the thermal-insulating composition comprises corn fibers as the filler in an amount of 0.5% to 1% by weight based on total weight of the composition. ### Claim 8 (depends on 1) The packaging material of claim 1, wherein the filler comprises insulating particles selected from the group consisting of ceramic air-containing particles, pearlite particles, and combinations thereof. ### Claim 9 (depends on 1) The packaging material of claim 1, wherein the organic binder includes a member selected from the group consisting of styrene-butadiene polymer, an acrylic-styrene butadiene polymer, starch, polyvinyl alcohol, polyvinyl acetate, and combinations thereof. ### Claim 10 (depends on 1) The packaging material of claim 1, wherein the plasticizer comprises 0.5% to 10% by weight of the composition. ### Claim 11 (depends on 1) The packaging material of claim 1, characterized by a thickness of the thermal-insulating composition in a range of 0.05 mm to 5 mm. ### Claim 12 (depends on 1) The packaging material of claim 1, wherein the thermal-insulating composition has a pseudoplasticity index in a range of 0.03 to 0.5. ### Claim 13 (depends on 1) The packaging material of claim 1, wherein the thermal-insulating composition has a low shear viscosity in a range of 2,000 to 50,000 cps, and a high shear viscosity in a range of 100 to 5,000 cps. ### Claim 14 (depends on 1) The packaging material of claim 1, characterized by a porosity of the paper-based substrate in a range 20 to 150 Gurley units. ### Claim 15 (depends on 1) The packaging material of claim 1, wherein the material is able to hold pressure in a range of 0.1 kgf/cm2 to 1.0 kgf/cm2. ### Claim 16 (depends on 1) A beverage cup including the packaging material of claim 1. ### Claim 17 (depends on 1) The packaging material of claim 1, wherein the filler comprises particles having an irregular shape. ### Claim 18 (depends on 1) The packaging material of claim 1 further comprising a paper-based top layer, the thermal-insulating composition being positioned between the first surface of the paper-based substrate and the paper-based top layer. ### Claim 19 (depends on 18) The packaging material of claim 18 further comprising a moisture barrier layer positioned on the paper-based top layer. ### Claim 20 (depends on 19) A beverage cup including the packaging material of claim 19. ### Claim 21 (depends on 18) The packaging material of claim 18 further comprising: a first moisture barrier layer positioned on the paper-based top layer, and a second moisture barrier layer positioned on the second surface of the paper-based substrate. ### Claim 22 (depends on 18) The packaging material of claim 18, characterized by a porosity of the paper-based top layer in a range 20 to 150 Gurley units. ### Claim 23 (depends on 18) The packaging material of claim 18, wherein the paper-based substrate and the top composition have a combined thickness associated therewith, and the thermal-insulating composition has a thickness associated therewith, and wherein the thickness of the thermal-insulating composition is in a range of 20-100% of the combined thickness of the paper-based substrate and the top layer. ### Claim 24 (depends on 23) The packaging material of claim 23, wherein the thermal-insulating composition provides space for separating the paper-based substrate and the top layer. ### Claim 25 (depends on 18) A beverage cup including the packaging material of claim 18. ### Claim 26 (depends on 1) The packaging material of claim 1, wherein the thermal-insulating composition comprises no more than 20% by weight of starch binder based on total weight of the thermal-insulating composition. ### Claim 27 (depends on 26) The packaging material of claim 26, wherein the starch binder comprises, based on total weight of the starch binder: (i) gelatinized starch in an amount of 10% to 50% by weight, and (ii) ungelatinized starch in an amount of 50% to 90% by weight. ### Claim 28 (depends on 26) The packaging material of claim 26, wherein the starch binder comprises, based on total weight of the starch binder: (i) gelatinized starch in an amount of 0% to 70% by weight, and (ii) ungelatinized starch in an amount of 30% to 100% by weight. ### Claim 29 (depends on 26) The packaging material of claim 26, wherein the starch binder comprises, based on total weight of the starch binder: (i) gelatinized starch in an amount of 50% to 100% by weight, and (ii) ungelatinized starch in an amount of 0% to 50% by weight. ### Claim 30 (depends on 1) The packaging material of claim 1, wherein the thermal-insulating composition comprises at least 20% by weight of starch binder based on total weight of the composition. ### Claim 31 (depends on 30) The packaging material of claim 30, wherein the starch binder comprises, based on total weight of the starch binder: (i) gelatinized starch in an amount of 10% to 50% by weight, and (ii) ungelatinized starch in an amount of 50% to 90% by weight. ### Claim 32 (depends on 1) The material of claim 1, wherein the thermal-insulating composition comprises ungelatinized starch and sodium silicate. ### Claim 33 (depends on 32) The packaging material of claim 32, wherein the thermal-insulating composition comprises, based on total weight of the composition: (i) ungelatinized starch in an amount of 5% to 32% by weight, and (ii) sodium silicate in an amount of 1% to 15% by weight. ### Claim 34 (depends on 1) The packaging material of claim 1, wherein the thermal-insulating composition comprises cellulosic solids as the filler in an amount of 2% to 50% by weight based on total weight of the composition. ### Claim 35 (depends on 34) The packaging material of claim 34, wherein a particle size of the cellulosic solids is more than 100 microns. ### Claim 36 (depends on 34) The packaging material of claim 34, wherein the cellulosic solids includes a member selected from the group consisting of cellulosic fibers, wood flour, wood dust, gluten feed, and combinations thereof. ### Claim 37 (depends on 36) The packaging material of claim 36, wherein the cellulosic fiber is characterized by a length of no greater than 2 mm and an aspect ratio of no greater than 25:1. ### Claim 38 (depends on 1) The packaging material of claim 1, wherein the thermal-insulating composition includes a void structure. ### Claim 39 (depends on 38) The packaging material of claim 38, wherein the void structure comprises air space between at least some of the filler, the organic binder, and the plasticizer. ### Claim 40 (depends on 38) A beverage cup including the packaging material of claim 38. ### Claim 41 (depends on 1) The packaging material of claim 1, wherein the thermal-insulating composition is positioned on the first surface in a random pattern. ### Claim 42 (depends on 41) A beverage cup including the packaging material of claim 41. ### Claim 43 (depends on 1) The packaging material of claim 1, wherein the thermal-insulating composition comprises a foam. ### Claim 44 (depends on 43) The packaging material of claim 43, wherein the foam is mechanically-induced. ### Claim 45 (depends on 43) The packaging material of claim 43, wherein the foam comprises a mechanically-whipped latex. ### Claim 46 (depends on 43) The packaging material of claim 43, wherein the foam comprise an emulsion polymer binder and a foam stabilizer. ### Claim 47 (depends on 43) A beverage cup including the packaging material of claim 43.