# US 8,541,070 B2 · Media for inkjet web press printing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,541,070 B2 - Document ID: US8541070B2 - Status: Granted - Kind: B2 - Application number: 13/260,360 - Filed: 2009-04-03 - Published: 2012-02-09 - Granted: 2013-09-24 - Earliest claimed: 2009-04-03 - Assignees: Hewlett-Packard Development Company, L.P. - Applicants: Yongzhong Wang; Xi Zeng; Kelly Ronk - Inventors: Yongzhong Wang; Xi Zeng; Kelly Ronk - Web page: https://patentgrep.com/patent/US8541070B2 ## CPC - B41M 5/5218: {characterised by inorganic additives, e.g. pigments, clays} - B01D 67/0072: {by deposition from the gaseous phase, e.g. sputtering, CVD, PVD} - B41M 5/506: {Intermediate layers} - B41M 5/52: Macromolecular coatings - B41M 5/5254: {characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers} - B41M 5/529: {characterised by the use of fluorine- or silicon-containing organic compounds} - C04B 41/009: {characterised by the material treated} - D21H 19/36: Coatings with pigments (D21H19/66 takes precedence; metal powder D21H19/06) - B41M 5/5227: {characterised by organic non-macromolecular additives, e.g. UV-absorbers, plasticisers, surfactants} - B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE - 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 media suitable for inkjet web press printing is disclosed herein. The media includes a paper substrate and an ink receptive layer coated onto at least one surface of the paper substrate. The ink receptive layer includes: inorganic pigments; at least one water-based binder; a water-soluble metallic salt; a colorant durability enhancer selected from the group consisting of boric acid, borax, sodium tetraborate, phenyl boronic acid, butyl boronic acid and combinations thereof; and a coefficient of friction (COF) reducer selected from the group consisting of polyethylene wax, paraffin wax, carnauba wax, polypropylene wax, polytetrafluoroethylene wax, and combinations thereof. ## Claims ### Claim 1 A media for inkjet web press printing comprising: a paper substrate comprising cellulose fibers; an ink receptive layer coated on at least one surface of the paper substrate, said ink receptive layer comprising a coating composition that comprises: inorganic pigments including at least two different clays with different particle sizes; at least one water-based binder; a water-soluble metallic salt; a colorant durability enhancer selected from the group consisting of boric acid, borax, sodium tetraborate, phenyl boronic acid, butyl boronic acid and combinations thereof; and a coefficient of friction (COF) reducer selected from the group consisting of polyethylene wax, paraffin wax, carnauba wax, polypropylene wax, polytetrafluoroethylene wax, and combinations thereof. ### Claim 2 (depends on 1) The media of claim 1, wherein the inorganic pigments are present in an amount ranging from 60% to 95% by weight based on the total dry weight of the ink receptive layer; said at least one water-based binder is present in amount ranging from 4% to 25% by weight based on the dry weight of the ink receptive layer; said water-soluble metallic salt is present in an amount ranging from 5% to 25% by weight based on the dry weight of the ink receptive layer; said colorant durability enhancer is present in an amount ranging from 0.1% to 20% of the dry weight of the at least one binder; and said COF reducer is present in an amount ranging from 0.5% to 5% by weight based on the dry weight of the ink receptive layer. ### Claim 3 (depends on 1) The media of claim 1, wherein said inorganic pigments are selected from the group consisting of calcined clays, kaolin clays, calcium carbonate, talc, alumina, silica titanium dioxide, zeolite, and combinations thereof. ### Claim 4 (depends on 1) The media of claim 1, wherein said at least one water-based binder is selected from the group consisting of polyvinyl alcohol, styrene-butadiene emulsion, acrylonitrile-butadiene latex, and combinations thereof. ### Claim 5 (depends on 4) The media of claim 4, wherein said at least one water-based binder includes two different binders. ### Claim 6 (depends on 1) The media of claim 1, wherein said water-soluble metallic salt is a mono-valent or multi-valent metallic salt having metal cation selected from the group consisting of Group I metals, Group II metals, Group III metals, transitional metals, and combinations thereof, and anion selected from the group consisting of chloride, iodide, bromide, nitrate, sulfate, sulfite, phosphate, chlorate, acetate, and combination thereof. ### Claim 7 A method for forming a media for inkjet web press printing comprising: (a) preparing a coating composition, the coating composition comprising: inorganic pigments including at least two different clays with different particle sizes; at least one water-based binder; a water-soluble metallic salt; a boron-containing compound selected from the group consisting of boric acid, borax, sodium tetraborate, phenyl boronic acid, butyl boronic acid and combinations thereof; and an emulsion of wax particles selected from the group consisting of polyethylene wax particles, paraffin wax particles, carnauba wax particles, polypropylene wax particles, polytetrafluoroethylene wax particles, and combinations thereof; and (b) applying the coating composition to at least one surface of a paper substrate. ### Claim 8 (depends on 7) The method of claim 7, wherein said inorganic pigments are selected from the group consisting of calcined clays, kaolin clays, calcium carbonate, talc, alumina, silica titanium dioxide, zeolite, and combinations thereof. ### Claim 9 (depends on 7) The method of claim 7, wherein said at least one water-based binder is selected from the group consisting of polyvinyl alcohol, styrene-butadiene emulsion, acrylonitrile-butadiene latex, and combinations thereof. ### Claim 10 (depends on 7) The method of claim 7, wherein said water-soluble metallic salt is a mono-valent or multi-valent metallic salt having metal cation selected from the group consisting of Group I metals, Group II metals, Group III metals, transitional metals, and combinations thereof, and anion selected from the group consisting of chloride, iodide, bromide, nitrate, sulfate, sulfite, phosphate, chlorate, acetate, and combination thereof. ### Claim 11 (depends on 7) The method of claim 7, wherein the pH of the coating composition ranges from 5 to 7. ### Claim 12 (depends on 7) A coated media formed by the method of claim 7.