# US 2013/0280545 A1 · Compositions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0280545 A1 - Document ID: US20130280545A1 - Status: Published application - Kind: A1 - Application number: 13/884,279 - Filed: 2011-11-09 - Published: 2013-10-24 - Earliest claimed: 2010-11-15 - Assignees: Imerys Minerals Limited - Inventors: John Claude Husband; Per Svending; David Robert Skuse - Web page: https://patentgrep.com/patent/US20130280545A1 ## CPC - D21H 19/34: comprising cellulose or derivatives thereof - D21H 17/25: Cellulose - D21H 17/63: Inorganic compounds - D21H 19/22: Polyalkenes, e.g. polystyrene - D21H 19/38: characterised by the pigments - D21H 19/52: Cellulose; Derivatives thereof - D21H 23/48: Curtain coaters - D21H 27/10: Packing paper (packaging materials of special type or form B65D65/38) - D21H 11/04: Kraft or sulfate pulp - Y10T 428/31703: Next to cellulosic - Y10T 428/31982: Wood or paper - Y10T 428/31993: Of paper - 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 - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Compositions such as filled and coated papers may include microfibrillated cellulose and inorganic particulate material. ## Claims ### Claim at position 1 1-26. (canceled) ### Claim 27 A paper product comprising a co-processed microfibrillated cellulose and inorganic particulate material composition, wherein the paper product has: i) a first tensile strength greater than a second tensile strength of the paper product devoid of the co-processed microfibrillated cellulose and inorganic particulate material composition; ii) a first tear strength greater than a second tear strength of the paper product devoid of the co-processed microfibrillated cellulose and inorganic particulate material composition; and/or iii) a first burst strength greater than a second burst strength of the paper product devoid of the co-processed microfibrillated cellulose and inorganic particulate material composition; and/or iv) first sheet light scattering coefficient greater than a second sheet light scattering coefficient of the paper product devoid of the co-processed microfibrillated cellulose and inorganic particulate material composition; and/or v) a first porosity less than a second porosity of the paper product devoid of the co-processed microfibrillated cellulose and inorganic particulate material composition; and/or vi) a first z-direction (internal bond) strength greater than a second z-direction (internal bond) strength of the paper product devoid of the co-processed microfibrillated cellulose and inorganic particulate material composition. ### Claim 28 (depends on 27) The paper product of claim 27, further comprising a paper coating composition which comprises a functional coating for liquid packaging, barrier coatings, or printed electronics applications. ### Claim 29 (depends on 27) The paper product of claim 27, further comprising a second coating comprising a polymer, a metal, an aqueous composition, or a combination thereof. ### Claim 30 (depends on 27) The paper product of claim 27, further having a first moisture vapour transmission rate (MVTR) lower than a second MVTR of the paper product devoid of the co-processed microfibrillated cellulose and inorganic particulate material composition. ### Claim 31 (depends on 27) The paper product of claim 27, wherein the paper comprises from about 0.5 wt. % to about 50 wt. % of the co-processed microfibrillated cellulose and inorganic particulate material composition. ### Claim 32 (depends on 27) The paper product of claim 27, wherein the paper comprises from about 25 wt. % to about 35 wt. % of the co-processed microfibrillated cellulose and inorganic particulate material composition. ### Claim 33 (depends on 27) The paper product of claim 27, which is coated with a paper coating composition, where the coated paper product has a first gloss greater than a second gloss of the coated paper product devoid of the co-processed microfibrillated cellulose and inorganic particulate material composition. ### Claim 34 (depends on 27) The paper product of claim 27, further comprising a coating composition which comprises a co-processed microfibrillated cellulose and inorganic particulate material composition. ### Claim 35 (depends on 34) The paper product of claim 34, wherein the inorganic particulate material composition of the coating composition is kaolin. ### Claim 36 (depends on 27) The paper product of claim 27, further comprising one or more functional coatings on the paper product. ### Claim 37 (depends on 36) The paper product of claim 36, wherein the one or more functional coatings is a polymer, a metal, an aqueous composition, or a combination thereof. ### Claim 38 (depends on 36) The paper product of claim 36, wherein the one or more functional coatings is a liquid barrier layer. ### Claim 39 (depends on 36) The paper product of claim 36, wherein the functional coating is a printed electronics layer. ### Claim 40 A papermaking composition comprising a co-processed microfibrillated cellulose and inorganic particulate material composition, wherein the papermaking composition has: (i) a first cationic demand lower than a second cationic demand of the papermaking composition devoid of the co-processed microfibrillated cellulose and inorganic particulate material composition; and/or (ii) a first, first-pass retention greater than a second, first-pass retention of the papermaking composition devoid of the co-processed microfibrillated cellulose and inorganic particulate material composition; and/or (iii) a first ash retention greater than a second ash retention of the papermaking composition devoid of the co-processed microfibrillated cellulose and inorganic particulate material composition. ### Claim 41 A papermaking composition comprising a co-processed microfibrillated cellulose and inorganic particulate material composition, wherein the papermaking composition is substantially devoid of retention aids. ### Claim 42 A paper product comprising a co-processed microfibrillated cellulose and inorganic particulate material composition, wherein the paper product has a first formation index lower than a second formation index of the paper product devoid of the co-processed microfibrillated cellulose and inorganic particulate material composition. ### Claim 43 (depends on 27) The paper product of claim 27, wherein the inorganic particulate material comprises an alkaline earth metal carbonate or sulphate, such as calcium carbonate, magnesium carbonate, dolomite, gypsum, a hydrous kandite clay such as kaolin, halloysite or ball clay, an anhydrous (calcined) kandite clay such as metakaolin or fully calcined kaolin, talc, mica, huntite, hydromagnesite, ground glass, perlite or diatomaceous earth, or combinations thereof. ### Claim 44 (depends on 27) The paper product of claim 27, wherein the microfibrillated cellulose has a d50 ranging from about 25 μm to about 250 μm, more preferably from about 30 μm to about 150 μm, even more preferably from about 50 μm to about 140 μm, still more preferably from about 70 μm to about 130 μm, and most preferably from about 50 μm to about 120 μm. ### Claim 45 (depends on 27) The paper product of claim 27, wherein the microfibrillated cellulose has a monomodal particle size distribution. ### Claim 46 (depends on 27) The paper product of claim 27, wherein the microfibrillated cellulose has a multimodal particle size distribution.