# US 2013/0153166 A1 · Paper substrates useful in wallboard tape applications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0153166 A1 - Document ID: US20130153166A1 - Status: Published application - Kind: A1 - Application number: 13/766,091 - Filed: 2013-02-13 - Published: 2013-06-20 - Earliest claimed: 2005-02-11 - Assignees: International Paper Company - Inventors: Stephen A. Buzza; Dennis W. Anderson; Yufeng Xu; Bruce Richard Mc Gaffin; Christopher Michael Wilson - Web page: https://patentgrep.com/patent/US20130153166A1 ## CPC - D21H 21/20: Wet strength agents - D21H 17/74: {of organic and inorganic material} - D21H 21/16: Sizing or water-repelling agents - D21H 17/42: anionic - D21H 21/18: Reinforcing agents - D21H 27/20: Flexible structures being applied by the user, e.g. wallpaper (printed wallpapers B41M3/18; paperhanging B44C7/00; pregummed wallpaper C09J7/21) - Y10T 428/249921: Web or sheet containing structurally defined element or component - 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 This invention relates to paper products and/or substrates suitable for being made and/or converted into wallboard tape; which also may be known as joint tape and/or drywall tape, having a pH of at least 7.0 and containing a plurality of cellulose fibers, a wet strength additive, an alkaline sizing agent, and an anionic promoter, as well as methods of making and using the same. ## Claims ### Claim 1 A paper substrate, comprising a plurality of cellulose fibers, a wet strength additive, and an alkaline sizing agent, wherein said substrate has a pH of from 7.0 to 14.0. ### Claim 2 (depends on 1) The paper substrate according to claim 1 having a basis weight of from 50 to 120 lbs/3000 sq. ft. ### Claim 3 (depends on 1) The paper substrate according to claim 1, having an apparent density of from 5.0 to 20 lb/1000 sq. ft. per 0.001 inch thickness. ### Claim 4 (depends on 1) The paper substrate according to claim 1, having a MD Tensile of from 25 to 100 lbf/inch width. ### Claim 5 (depends on 1) The paper substrate according to claim 1, having a CD Tensile of from 5 to 50 lbf/inch width. ### Claim 6 (depends on 1) The paper substrate according to claim 1, wherein at least a majority of the plurality of cellulose fibers is softwood fibers. ### Claim 7 (depends on 1) The paper substrate according to claim 1, further comprising calcium carbonate. ### Claim 8 (depends on 1) The paper substrate according to claim 1, wherein the alkaline sizing agent is at least one member selected from the group consisting of alkyl ketene dimer, alkenyl ketene dimer and alkenyl succinic anhydride. ### Claim 9 (depends on 1) The paper substrate according to claim 1, further comprising an anionic promoter. ### Claim 10 (depends on 9) The paper substrate according to claim 9, wherein the anionic promoter is at least one member selected from the group consisting of a polyacrylate, sulfonate, carboxymethyl cellulose, galactomannan hemicellulose and polyacrylamide. ### Claim 11 (depends on 1) The paper substrate according to claim 1, further comprising at least one member selected from the group consisting of a binder, filler, thickener, and preservative. ### Claim 12 (depends on 1) The paper substrate according to claim 1, wherein the substrate is abraded. ### Claim 13 (depends on 1) The paper substrate according to claim 1, wherein the substrate is sanded. ### Claim 14 (depends on 1) A paper substrate according to claim 1, wherein said substrate has a width off a winder of a paper machine of from 15 to 100 inches. ### Claim 15 (depends on 1) A paper substrate according to claim 1, wherein said paper substrate is abraded or sanded and has a cut width of from 1.5 to 3.25 inches. ### Claim 16 (depends on 1) The paper substrate according to claim 1, wherein the wet strength agent is at least one member or combinations selected from the group consisting of a polymeric amine epichlorohydrin, urea formaldehyde, melamine formaldehyde and glyoxylated polyacrylamide resins. ### Claim 17 (depends on 1) The paper substrate according to claim 1, further comprising calcium carbonate in at least one form selected from the group consisting of precipitated calcium carbonate and ground calcium carbonate. ### Claim 18 (depends on 1) The paper substrate according to claim 1, wherein the alkaline sizing agent is at least one unsaturated hydrocarbon having from 16 to 20 carbon atoms. ### Claim 19 (depends on 1) The paper substrate according to claim 1, further comprising a binder. ### Claim 20 (depends on 1) A method of making the paper substrate according to claim 1, comprising contacting a plurality of cellulose fibers with a wet strength additive, an alkaline sizing agent, and optionally an anionic promoter consecutively and/or simultaneously. ### Claim 21 (depends on 20) The method according to claim 20, wherein said contacting occurs within an aqueous environment having a pH of from 7.0 to 14.0. ### Claim 22 A paper substrate, comprising a plurality of cellulose fibers; a wet strength additive; an alkaline sizing agent; and optionally an anionic promoter, wherein said substrate has a pH of from 7.0 to 14.0; and said substrate has an internal bond of from about 25 to about 350 milli ft-lb/sq. in. as measured by TAPPI method 541. ### Claim 23 (depends on 22) The paper substrate according to claim 22, wherein the substrate has an internal bond of from about 50 to about 250 milli ft-lb/sq. in. as measured by TAPPI method 541. ### Claim 24 (depends on 22) A method of making the paper substrate according to claim 22, comprising contacting a plurality of cellulose fibers with a wet strength additive, an alkaline sizing agent, and optionally an anionic promoter consecutively and/or simultaneously.