IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0826734
(2010-06-30)
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등록번호 |
US-8252373
(2012-08-28)
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발명자
/ 주소 |
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출원인 / 주소 |
- International Paper Company
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
78 |
초록
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The invention relates to a gloss coated multifunctional printing paper that can be used with a variety of office printing equipment including inkjet and electrophotographic and to processes of making and using the paper, a paper substrate; and a pigmented composition coated on at least one surface o
The invention relates to a gloss coated multifunctional printing paper that can be used with a variety of office printing equipment including inkjet and electrophotographic and to processes of making and using the paper, a paper substrate; and a pigmented composition coated on at least one surface of the substrate, said pigmented coating composition comprising (1) a first pigment having a BET surface area in the range of from about 50 to about 750 m2/g; (2) a second pigment having a BET surface area in the range of from about 5 to about 49 m2/g; and (3) a polymeric binder. Said coated paper having a coating gloss equal to or greater than about 30% at 75° and a Bristow Absorption length of less than about 180 mm. The coating compositions may contain other additives such as lubricants, optical brighteners and coating rheology modifiers. The coating formulations can be applied to the base stock using any of a large number of coating techniques including application roll with bent blade, rod, air knife, slot die, curtain spray and gravure. The paper can be used with various inkjet and electrophotographic printing apparatus and techniques.
대표청구항
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1. A method of producing a coated paper, comprising: (a) preparing an aqueous coating formulation comprising: (i) water;(ii) a first pigment having a BET surface area in the range of from about 50 to about 750 m2/g and selected from the group consisting of silica, silica sol, fine (sub micron) parti
1. A method of producing a coated paper, comprising: (a) preparing an aqueous coating formulation comprising: (i) water;(ii) a first pigment having a BET surface area in the range of from about 50 to about 750 m2/g and selected from the group consisting of silica, silica sol, fine (sub micron) particles of precipitated calcium carbonate, fine (sub micron) particles of kaolin clay, synthetic clay, calcium silicate fine powder, and a mixture thereof;(iii) a second pigment having a BET surface area in the range of from about 5 to about 49 m2/g and selected from the group consisting of ground calcium carbonate, precipitated calcium carbonate, kaolin clay, calcined clay, titanium dioxide, plastic pigment, talc, wax particles, polymeric beads, and a mixture thereof; and(iv) a polymeric binder;(b) applying the aqueous coating formulation to one or both surfaces of a paper substrate, to form a coated paper;(c) drying the coated paper, to form a dried coated paper; and(d) calendaring the dried coated paper to form a dried calendared paper suitable for multifunctional printing, said dried calendared paper comprising: a paper substrate; anda pigmented composition coated on at least one surface of the substrate, said pigmented coating composition comprising a mixture of: (a) a first pigment having a BET surface area in the range of from about 50 to about 750 m2/g, wherein said first pigment is silica, silica sol, fine (sub micron) particles of precipitated calcium carbonate, fine (sub micron) particles of kaolin clay, synthetic clay, calcium silicate fine powder, or a mixture thereof;(b) a second pigment having a BET surface area in the range of from about 5 to about 49 m2/g, wherein said second pigment is ground calcium carbonate, precipitated calcium carbonate, kaolin clay, calcined clay, titanium dioxide, plastic pigment; talc, wax particles, polymeric beads, or a mixture thereof; andc) a polymeric binder,said dried calendared paper having a coating gloss equal to or greater than about 30% at 75° and a Bristow Absorption length of less than about 180 mm. 2. The method of claim 1, further comprising: (a) incorporating the dried calendared paper into an inkjet or electrophotographic printing apparatus; and(b) forming with said apparatus an image on a surface of said dried calendared paper to form a dried calendared paper having an image on a surface thereof. 3. The method according to claim 1, wherein said (b) applying the aqueous coating formulation to one or both surfaces of the paper substrate is performed with a size press. 4. The method according to claim 1, wherein (c) drying the coated paper is performed until the dried coated paper has a moisture content of less than or equal to about 10% by weight. 5. The method according to claim 1, wherein said (d) calendaring of the dried coated paper to form the dried calendared paper is performed at a pressure ranging from about 1000 to about 2000 pounds per linear inch. 6. The method according to claim 1, wherein said (d) calendaring of the dried coated paper to form the dried calendared paper is performed at a temperature ranging from about 150 to about 200° F. 7. The method according to claim 1, wherein the dried calendared paper comprises: (a) about 40 to about 99 weight % of said first pigment based on the total weight of said first and second pigments in the coating; (b) about 1 to about 60 weight % of said second pigment based on the total amount of said first and second pigments in the coating; and (c) about 5 to about 40 parts (dry basis) of polymeric binders based on 100 parts (dry basis) of said first and second pigments. 8. The method according to claim 1, wherein the first pigment is fine (sub micron) particles of precipitated calcium carbonate, and wherein the second pigment is precipitated calcium carbonate, ground calcium carbonate, kaolin clay, calcined clay, hollow sphere plastic pigment, or a mixture thereof. 9. A method of producing a coated paper, comprising: (a) preparing an aqueous coating formulation comprising: (i) water;(ii) a first pigment having a BET surface area in the range of from about 50 to about 750 m2/g and selected from the group consisting of silica, alumina sol, silica sol, alumina, zeolites, fine (sub micron) particles of precipitated calcium carbonate, fine (sub micron) particles of kaolin clays, synthetic clays, mixed oxides of aluminum and silicon, calcium silicate fine powders, and mixtures thereof;(iii) a second pigment having a BET surface area in the range of from about 5 to about 49 m2/g and selected from the group consisting of ground calcium carbonates, precipitated calcium carbonates, kaolin clays, calcined clays, titanium dioxide, plastic pigments, aluminum trihydrates, talc, polytetrafluoroethylene, polyethylene, polypropylene, wax particles, and polymethylmethacrylate beads, and mixtures thereof; and(iv) a polymeric binder selected from the group consisting of styrene butadiene rubber latex, styrene acrylate, polyvinyl alcohol and copolymers, polyvinyl acetates and copolymers, vinyl acetate polymers and copolymers, carboxylated SBR latex, styrene/butadiene copolymers, styrene acrylate copolymers, styrene/butadiene/acrylonitrile, styrene/butadiene/acrylate/acrylonitrile, polyvinyl pyrrolidone and copolymers, polyethylene oxide, poly(2-ethyl-2-oxazoline), polyester resins, gelatins, casein, alginate, cellulose derivatives, acrylic vinyl polymers, soy protein polymer, hydroxymethyl cellulose, hydroxypropyl cellulose, starches, ethoxylated, oxidized and enzyme converted starches, cationic starches, water soluble gums, mixtures of water soluble and water-insoluble resins or polymer latex;(b) applying the aqueous coating formulation to one or both surfaces of a paper substrate, to form a coated paper;(c) drying the coated paper, to form a dried coated paper; and(d) calendaring the dried coated paper to form a dried calendared paper suitable for multifunctional printing comprising: a paper substrate; anda pigmented composition coated on at least one side of the substrate, said pigmented coating composition comprising a mixture of: (a) a first pigment selected from the group consisting of silica, alumina sol, silica sol, alumina, zeolites, fine (sub micron) particles of precipitated calcium carbonate, fine (sub micron) particles of kaolin clays, synthetic clays, mixed oxides of aluminum and silicon, calcium silicate fine powders, and mixtures thereof, and having a BET surface area in the range of from 50 to 750 m2/g;(b) a second pigment selected from the group consisting of ground calcium carbonates, precipitated calcium carbonates, kaolin clays, calcined clays, titanium dioxide, plastic pigments, aluminum trihydrates, talc, polytetrafluoroethylene, polyethylene, polypropylene, wax particles, and polymethylmethacrylate beads, and mixtures thereof, and having a BET surface area in the range of from 5 to 49 m2/g; and(c) a polymeric binder selected from the group consisting of styrene butadiene rubber latex, styrene acrylate, polyvinyl alcohol and copolymers, polyvinyl acetates and copolymers, vinyl acetate polymers and copolymers, carboxylated SBR latex, styrene/butadiene copolymers, styrene acrylate copolymers, styrene/butadiene/acrylonitrile, styrene/butadiene/acrylate/acrylonitrile, polyvinyl pyrrolidone and copolymers, polyethylene oxide, poly(2-ethyl-2-oxazoline), polyester resins, gelatins, casein, alginate, cellulose derivatives, acrylic vinyl polymers, soy protein polymer, hydroxymethyl cellulose, hydroxypropyl cellulose, starches, ethoxylated, oxidized and enzyme converted starches, cationic starches, water soluble gums, mixtures of water soluble and water-insoluble resins or polymer latex; wherein the amount of the first pigment is from 50 to 90 weight % based on the total amount of the first and second pigments in the coating and the amount of the second pigment is from 10 to 50 weight % based on the total amount of the first and second pigments in the coating; the amount of the polymeric binder is from 5 to 40 parts based on 100 parts of the first and second pigments in the coating where all parts are on a dry weight basis;said dried calendared paper having a coating gloss equal to or greater than about 30% at 75° and a Bristow Absorption length of less than about 180 mm. 10. The method of claim 9, further comprising: (a) incorporating the dried calendared paper into an inkjet or electrophotographic printing apparatus; and(b) forming with said apparatus an image on a surface of said dried calendared paper to form a dried calendared paper having an image on a surface thereof. 11. The method according to claim 9, wherein said (b) applying the aqueous coating formulation to one or both surfaces of the paper substrate is performed with a size press. 12. The method according to claim 9, wherein (c) drying the coated paper is performed until the dried coated paper has a moisture content of less than or equal to about 10% by weight. 13. The method according to claim 9, wherein said (d) calendaring of the dried coated paper to form the dried calendared paper is performed at a pressure ranging from about 1000 to about 2000 pounds per linear inch. 14. The method according to claim 9, wherein said (d) calendaring of the dried coated paper to form the dried calendared paper is performed at a temperature ranging from about 150 to about 200° F. 15. The method according to claim 9, wherein the second pigment is selected from the group consisting of precipitated calcium carbonate, kaolin clay, calcined clay, hollow sphere plastic pigment, and a mixture thereof. 16. The method according to claim 9, wherein the first pigment is selected from the group consisting of fine (sub micron) particles of precipitated calcium carbonate and wherein the second pigment is selected from the group consisting of precipitated calcium carbonate, kaolin clay, calcined clay, hollow sphere plastic pigment, and mixture thereof.
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