# US 9,775,377 B2 · Tobacco product wrapping material with controlled burning properties > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,775,377 B2 - Document ID: US9775377B2 - Status: Granted - Kind: B2 - Application number: 14/529,530 - Filed: 2014-10-31 - Published: 2015-04-30 - Granted: 2017-10-03 - Earliest claimed: 2013-10-31 - Assignees: Julius Glatz GmbH - Applicants: Julius Glatz GmbH - Inventors: Thomas Fritzsching; Christoph Nover; Marijan Vucak - Web page: https://patentgrep.com/patent/US9775377B2 ## CPC - A24D 1/02: with special covers - D21H 17/66: Salts, e.g. alums - D21H 17/675: {Oxides, hydroxides or carbonates} - D21H 17/69: modified, e.g. by association with other compositions prior to incorporation in the pulp or paper - A24D 1/025: {the covers having material applied to defined areas, e.g. bands for reducing the ignition propensity} - A24D: CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES - 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 ## Abstract A tobacco product wrapping, material comprising composite particles is described, the composite particles being obtainable by a method in which an aqueous suspension containing calcium carbonate particles is prepared, and a metal salt comprising an aluminum cation is added. The metal salt is able to form a basic metal component in the suspension; and has a solubility of greater than 9.0 mg/L in water, measured at the pH value of the prepared suspension and at a temperature of 20° C. The invention further relates to a method for the production of the tobacco product wrapping material, the use of such tobacco product wrapping material for the production of tobacco products, and the tobacco products produced with the tobacco product wrapping material. ## Claims ### Claim 1 A tobacco product wrapping material comprising composite particles obtained according to a method comprising: (a) preparing an aqueous suspension containing calcium carbonate particles; and (b) adding a metal salt to the aqueous suspension, wherein the metal salt comprises at least one of aluminum nitrate, polyaluminum chloride, and aluminum nitrate sulfate and further wherein the metal salt: (i) forms a basic metal component in the suspension; and (ii) has a solubility of greater than 9.0 mg/L in water, measured at the pH value of the prepared suspension and at a temperature of 20° C. ### Claim 2 (depends on 1) A tobacco product wrapping material according to claim 1, characterized in that, in an x-ray diffractogram of the composite particles, the signal intensity at 2θ=18.3±1.0 is less than 100.0%, wherein the intensity of the signal at 2θ=29.5±1.0 is defined as 100.0%. ### Claim 3 (depends on 1) A tobacco product wrapping material according to claim 1, characterized in that, in an x-ray diffractogram of the composite particles, the signal intensity at 2θ=18.3±1.0 is less than 100.0%, wherein the intensity of the signal at 2θ=26.2±1.0 is defined as 100.0%. ### Claim 4 (depends on 1) A tobacco product wrapping material according to claim 1, characterized in that the composite particles have a BET surface area in the range from 0.1 m2/g to less than 25 m2/g. ### Claim 5 (depends on 1) A tobacco product wrapping material according to claim 1, characterized in that the composite particles are present in amounts of 1-50 wt. % based on the total weight of the tobacco product wrapping material. ### Claim 6 (depends on 1) A tobacco product wrapping material according to claim 1, characterized in that the tobacco product wrapping material is a tipping paper. ### Claim 7 (depends on 1) A tobacco product wrapping material according to claim 1, characterized in that the tobacco product wrapping material is a filter wrapping paper. ### Claim 8 (depends on 1) A tobacco product wrapping material according to claim 1, characterized in that the tobacco product wrapping material is a cigarette paper. ### Claim 9 (depends on 8) A tobacco product wrapping material according to claim 8, characterized in that the cigarette paper contains discrete zones of reduced air permeability. ### Claim 10 (depends on 9) A tobacco product wrapping material according to claim 9, characterized in that the discrete zones of the cigarette paper contain a mechanically fragmented, chemically crosslinked polysaccharide with a particle size, defined as the weight-average particle size of the dry product, in the range of 1-1,000 μm. ### Claim 11 (depends on 10) A tobacco product wrapping material according to claim 10, wherein the mechanically fragmented and chemically crosslinked polysaccharide is a mechanically fragmented and chemically crosslinked starch. ### Claim 12 (depends on 1, 10) A tobacco product wrapping material according to claim 10, characterized in that the discrete zones of the cigarette paper also contain composite particles according to the definition of claim 1 and possibly additional fillers in addition to the mechanically fragmented, chemically crosslinked polysaccharide with a particle size, defined as the weight-average particle size of the dry product, in the range of 1-1,000 μm. ### Claim 13 (depends on 11) A tobacco product wrapping material according to claim 11, characterized in that the discrete zones of the cigarette paper also contain said composite particles and, optionally, additional fillers in addition to the mechanically fragmented, chemically crosslinked polysaccharide with a particle size, defined as the weight-average particle size of the dry product, in the range of 1-1,000 μm. ### Claim 14 (depends on 1) The method of claim 1, wherein the pH value of the prepared aqueous suspension is between 6.0 and 13.0. ### Claim 15 A method for the production of a tobacco product wrapping material, wherein the method comprises: forming a pulp suspension, wherein the pulp suspension comprises a cellulose pulp and composite particles, wherein the composite particles are obtained according to a method comprising: (a) preparing an aqueous suspension containing calcium carbonate particles; and (b) adding a metal salt to the aqueous suspension, wherein the metal salt comprises an aluminum cation, and further wherein the metal salt: (i) forms a basic metal component in the suspension; and (ii) has a solubility of greater than 9.0 mg/L, in water, measured at the pH value of the prepared suspension and at a temperature of 20° C.; draining the pulp suspension; and drying the pulp suspension. ### Claim 16 (depends on 15) The method of claim 15, wherein the pH of the prepared aqueous suspension is between 6.0 and 13.0. ### Claim 17 A tobacco product, characterized in that it comprises a tobacco product wrapping material comprising composite particles obtained according to a method comprising: (a) preparing an aqueous suspension containing calcium carbonate particles; and (b) adding a metal salt to the aqueous suspension, wherein the metal salt comprises at least one aluminum nitrate, polyaluminum chloride, and aluminum nitrate sulfate, and further wherein the metal salt: (i) forms a basic metal component in the suspension; and (ii) has a solubility of greater than 9.0 mg/L in water, measured at the pH value of the prepared suspension and at a temperature of 20° C. ### Claim 18 A method for the production of a tobacco product wrapping material, wherein the method comprises: forming a cellulose pulp suspension; draining the cellulose pulp suspension to form a wet fiber network; drying the wet fiber network to form a fiber network; providing composite particles formed according to a method comprising: (a) preparing an aqueous suspension containing calcium carbonate particles; and (b) adding a metal salt to the aqueous suspension, wherein the metal salt comprises at least one of aluminum nitrate, polyaluminum chloride, and aluminum nitrate sulfate, and further wherein the metal salt: (i) forms a basic metal component in the suspension; and (ii) has a solubility of greater than 9.0 mg/L in water, measured at the pH value of the prepared suspension and at a temperature of 20° C.; and applying the composite particles to the fiber network using at least one of a sizing press application, a spray application, and a spray nozzle application. ### Claim 19 (depends on 18) The method of claim 18, wherein the pH of the prepared aqueous suspension is between 6.0 and 13.0.