# US 8,784,610 B1 · Method for making paper from post-industrial packaging material > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,610 B1 - Document ID: US8784610B1 - Status: Granted - Kind: B1 - Application number: 13/337,861 - Filed: 2011-12-27 - Granted: 2014-07-22 - Earliest claimed: 2010-12-27 - Assignees: George A. Whiting Paper Company - Applicants: Thomas A. Danz - Inventors: Thomas A. Danz - Web page: https://patentgrep.com/patent/US8784610B1 ## CPC - D21H 11/14: Secondary fibres (working-up waste paper D21C5/02) - D21C 5/00: Other processes for obtaining cellulose, e.g. cooking cotton linters (obtaining fibres for spinning D01C); {Processes characterised by the choice of cellulose-containing starting materials} - D21C 5/02: Working-up waste paper (mechanical part D21B1/08, D21B1/32) - D21H 11/12: Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse - D21H 27/00: Special paper not otherwise provided for, e.g. made by multi-step processes - D21H 27/10: Packing paper (packaging materials of special type or form B65D65/38) - Y02W 30/64: Paper recycling - 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 - D21C: PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR - Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT ## Abstract A method is provided for making paper and paper products from post-industrial packaging materials. The post-industrial packaging materials may include used bulk packaging transportation bags that are made at least partially from sisal and/or jute, such as coffee bean bags or used cocoa bean bags for transporting bulk quantities of coffee beans or cocoa beans, or other materials that have sisal and/or jute constituents. The post-industrial packaging materials may be used to make a mixed fiber stock that includes the post-industrial packaging materials and the post consumer fiber stock and/or other wood-based fiber stock that is a combined with the post-industrial packaging stock prior to the mixed fiber stock being run through a paper machine to make paper and paper products that may be used back in the industry that created the waste. ## Claims ### Claim 1 A method of producing paper from post-industrial packaging material comprising the steps of: pulping a first material that includes post-industrial packaging (PIP) to make a volume of PIP containing stock; recirculating the PIP containing stock through a recirculation loop defined at least in part between a surge chest and a refiner during a first time period; pulping a second material that includes at least one of (i) post consumer fiber (PCF) to make a volume of PCF stock, and (ii) non-PCF wood based fiber (WBF) to make a volume of WBF stock; combining the volumes of PIP containing stock and the at least one of PCF stock and WBF stock to make a volume of mixed fiber stock during a second time period; and running the mixed fiber stock through a paper machine to produce paper having a wax pick value of about 13 or greater. ### Claim 2 (depends on 1) The method of claim 1, wherein the PIP containing stock includes at least one of (i) sisal fibers and (ii) jute fibers that define at least about 50% of a total fiber mass of the mixed fiber stock. ### Claim 3 (depends on 2) The method of claim 2, wherein at least one of used coffee bean bags and used cocoa bean bags provide the sisal and jute fibers of the PIP containing stock. ### Claim 4 (depends on 1) The method of claim 1, wherein the PIP containing stock further comprises a volume of at least one of PCF and WBF and wherein the at least one of PCF and WBF defines no more than about 25% of a total fiber mass of the PIP containing stock. ### Claim 5 (depends on 1) The method of claim 1, wherein, within the mixed fiber stock, the volume of PIP containing stock is less than the volume of the at least one of PCF stock and WBF stock. ### Claim 6 A method of producing paper from post-industrial packaging material comprising the steps of: pulping a first material that includes post-industrial packaging (PIP) having at least one of sisal fibers and jute fibers to make a volume of PIP containing stock; recirculating the PIP containing stock between a surge chest and a refiner during a first time period; pulping a second material that includes at least one of (i) post consumer fiber (PCF) to make a volume of PCF stock, and (ii) non-PCF wood-based fiber (WBF) to make a volume of WBF stock; combining the volumes of PIP containing stock and the at least one of PCF stock and WBF stock to make a volume of mixed fiber stock during a second time period; running the mixed fiber stock through a paper machine to produce paper incorporating at least one of sisal fibers and jute fibers; and making a paper product from the paper, wherein the paper product has a basis weight of less than about 65# per (24×36-500) area and has a wax pick value of about 13 or greater. ### Claim 7 (depends on 6) The method of claim 6, wherein the at least one of sisal fibers and jute fibers defines at least about 50% of a total fiber mass of the mixed fiber stock. ### Claim 8 (depends on 6) The method of claim 6, wherein the at least one of sisal fibers and jute fibers defines at least about 75% of a total fiber mass of the PIP containing stock. ### Claim 9 (depends on 8) The method of claim 8, wherein the at least one of sisal fibers and jute fibers defines at least about 85% of a total fiber mass of the PIP containing stock. ### Claim 10 (depends on 6) The method of claim 6, further comprising directing the PIP containing stock through a primary cleaner and to a headbox of the paper machine while bypassing a Selectifier pressure screen that is provided between the primary cleaner and the headbox. ### Claim 11 (depends on 6) The method of claim 6, further comprising removing a basket from a pressure screen and directing the PIP containing stock through the pressure screen with its basket removed while pumping the PIP containing stock from a surge chest to a refiner. ### Claim 12 (depends on 6) The method of claim 6, further comprising controlling a color of the paper by controlling an amount of sisal relative to at least one other component of the material loaded into a pulper. ### Claim 13 (depends on 6) The method of claim 6, wherein the paper has a SHEFFIELD smoothness value of about 400 or less. ### Claim 14 (depends on 6) The method of claim 6, wherein the paper has a GURLEY porosity value of about 10 seconds or greater. ### Claim 15 (depends on 6) The method of claim 6, wherein the paper has an HST value of about 200 seconds or greater. ### Claim 16 A method of producing paper from post-industrial packaging material comprising the steps of: pulping a first material that includes post-industrial packaging (PIP) having at least one of sisal fibers and jute fibers to make a volume of PIP containing stock; pulping a second material that includes at least one of (i) post consumer fiber (PCF) to make a volume of PCF stock, and (ii) non-PCF wood-based fiber (WBF) to make a volume of WBF stock; combining the volumes of PIP containing stock and the at least one of the PCF stock and the WBF stock to make a volume of mixed fiber stock wherein the at least one of the sisal and jute fibers defines at least about 50% of a total fiber mass of the mixed fiber stock; and running the mixed fiber stock through a paper machine to produce paper having a basis weight of less than about 65# per (24×36-500) area. ### Claim 17 (depends on 16) The method of claim 16, wherein the paper has a wax pick value of about 13 or greater and a SHEFFIELD smoothness value of about 400 or less. ### Claim 18 (depends on 17) The method of claim 17, wherein the paper has a GURLEY porosity value of about 10 seconds or greater and an HST value of about 200 seconds or greater.