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Paper surface sizing composition, sized paper, and method for sizing paper

a paper surface sizing and composition technology, applied in the field of paper surface sizing composition, can solve the problems of uncoated papers not having the properties desired in coated papers, uncoated papers often have significant increases in cost,

Inactive Publication Date: 2008-07-24
INT PAPER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While these coated papers have the above described desirable paper properties, these properties are often achieved at a significant increase in cost relative to uncoated papers.
While uncoated papers are significantly less expensive compared to coated papers, uncoated papers also may not have the properties desired in coated papers, for example, brightness, opacity, paper smoothness, print quality, etc.

Method used

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  • Paper surface sizing composition, sized paper, and method for sizing paper
  • Paper surface sizing composition, sized paper, and method for sizing paper
  • Paper surface sizing composition, sized paper, and method for sizing paper

Examples

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Effect test

example 1

[0154]A surface sizing composition is prepared according to the following formulation.

TABLE 1aSize press coating formulationsAragonite precipitated calcium carbonate(1)100 parts Starch60 partsVinyl acetate ethylene copolymer(2)10 partsSodium chloride30 partsLeucophor T-100(3)10 parts(1)Supplied by Mississippi Lime Company, Alton, Illinois, 62002(2)Supplied by Air Products and Chemicals, Inc, Allentown, PA 18195. Instead of vinyl acetate ethylene copolymer, a polyvinyl alcohol (PVOH) may be used.(3)Supplied by Clariant Corporation, Charlotte, NC 28205

[0155]The surface sizing solution containing the above ingredients is made at 16% solids. The Brookfield viscosity is measured to be 40 cps using #2 spindle, 100 rpm at 150 degrees F. The surface size composition is applied to a 75-gsm rawstock using a rod metering size press coater. The target pickup is 5.4 gsm total for both sides of the paper. Calendering is done on a steel-to-steel lab calender at room temperature with a nip pressure...

example 2

[0162]The surface sizing compositions are prepared according to the following formulations.

TABLE 2aSize press coating formulationsExampleExampleExampleExampleExampleExampleChemicals2a2b2c2d2e2fGround Calcium50100100carbonate(1)Aragonite50100100precipitated calciumcarbonate(2)Oxidized starch1001001001006060Vinyl acetate ethylene1010copolymer(3)NaCl5.255.257766OBA(4)141419191919Target size press140140140140140140pickuplb / tonlb / tonlb / tonlb / tonlb / tonlb / tonSolids, actual20.120.020.220.120.220.2Brookfield @ 50 rpm1358883686464PH8.18.58.18.47.68.1temp152150150152150152(1)Supplied by Omya, Inc, Proctor, VT 05765(2)Supplied by Mississippi Lime Company, Alton, Illinois, 62002(3)Supplied by Air Products and Chemicals, Inc, Allentown, PA 18195(4)Supplied by Clariant Corporation, Charlotte, NC 28205

[0163]The pigmented size press formulations are applied to an unsurface sized 75 gsm base paper using a rod metering size press. The target coat weight or pick up is 5-6 gsm. Calendering is done on a ...

example 3

[0165]The surface sizing compositions are prepared according to the following formulations.

TABLE 3aSize press coating formulationsExampleExampleExampleExampleExampleExampleExampleChemicals3a3b3c3d3e3f3gGround calcium100carbonate(1)Aragonite precipitated100100100100100calcium carbonate(2)Starch10010010060606060Vinyl acetate102020ethylene copolymer(3)Modified carboxylated20styrene butadienecopolymer(4)Carboxylated styrene20butadiene copolymer(5)NaCl4777777Fluorescence Optical60606060606060Brightener(6)Solids %20202020202020Brookfield @ 50 rpm115486434364130pH7.88.38.18.07.78.08.1Temp, F.150150149151148151150Target size140140140140140140140press pickuplb / tonlb / tonlb / tonlb / tonlb / tonlb / tonlb / ton(1)Supplied by Omya, Inc, Proctor, VT 05765(2)Supplied by Mississippi Lime Company, Alton, Illinois, 62002(3)Supplied by Air Products and Chemicals, Inc, Allentown, PA 18195. Instead of vinyl acetate ethylene copolymer, a polyvinyl alcohol (PVOH) may be used.(4)Supplied by RhomNova, Akron, Ohio 44...

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Abstract

Embodiments of the present invention provide a paper surface sizing composition, a paper web coated on one or more sides or surfaces with a paper surface sizing composition, and a method for treating one or more sides of the paper web with a paper surface sizing composition to impart benefits relating to one or more of the following properties: (1) brightness; (2) opacity; (3) paper smoothness; (4) print quality; (5) optionally ink dry time (e.g., for ink jet printing where the sizing composition has option); and (6) optionally minimizing or eliminating edge welding (e.g., for paper webs used in, for example, form printing).

Description

BACKGROUND[0001]1. Field of the Invention[0002]The present invention broadly relates to a paper sizing composition which may be used with uncoated or single-side coated paper webs. The present invention also broadly relates to paper webs treated on one or both sides with a paper surface sizing composition to impart benefits relating to one or more of the following properties: (1) brightness; (2) opacity; (3) paper smoothness; (4) print quality; (5) optionally ink dry time (e.g., for ink jet printing where the sizing composition has option); and (6) optionally minimizing or eliminating edge welding (e.g., for paper webs used in, for example, form printing). The present invention further broadly relates a method for treating one or more sides of an uncoated or a single-side coated paper web with a paper surface sizing composition.[0003]2. Related Art[0004]Conventional papermaking for calendered papers involves formation of a web of fibers on a papermaking machine using, for example, a...

Claims

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Application Information

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IPC IPC(8): D21H19/54C09D103/06D21H17/28
CPCC08L3/02C08L3/10D21H17/28D21H19/385D21H21/16D21H21/52Y10T428/277D21H19/84D21H19/44C08L2666/06C08L2666/02
Inventor SONG, JAY CHENYANG, SENHOLLMAIER, LARRYKOENIG, MICHAELHONG, YAOLIANGPAMIDIMUKKALA, KRISHNA M.RENFRO, MICHAELLIGUZINSKI, BENJAMIN T.
Owner INT PAPER CO
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