WO2011019786A2 - Application of chemical aids after a headbox of a papermaking process - Google Patents

Application of chemical aids after a headbox of a papermaking process Download PDF

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Publication number
WO2011019786A2
WO2011019786A2 PCT/US2010/045116 US2010045116W WO2011019786A2 WO 2011019786 A2 WO2011019786 A2 WO 2011019786A2 US 2010045116 W US2010045116 W US 2010045116W WO 2011019786 A2 WO2011019786 A2 WO 2011019786A2
Authority
WO
WIPO (PCT)
Prior art keywords
papermaking process
chemicals
headbox
sizing
sheet
Prior art date
Application number
PCT/US2010/045116
Other languages
French (fr)
Other versions
WO2011019786A3 (en
Inventor
Tommy Jacobson
Aleksandar Todorovic
Kaj A. Kokko
James L. Thomas
Original Assignee
Nalco Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nalco Company filed Critical Nalco Company
Publication of WO2011019786A2 publication Critical patent/WO2011019786A2/en
Publication of WO2011019786A3 publication Critical patent/WO2011019786A3/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/06—Paper forming aids
    • D21H21/10—Retention agents or drainage improvers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/14—Carboxylic acids; Derivatives thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/14—Carboxylic acids; Derivatives thereof
    • D21H17/15—Polycarboxylic acids, e.g. maleic acid
    • D21H17/16—Addition products thereof with hydrocarbons
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/17—Ketenes, e.g. ketene dimers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/62—Rosin; Derivatives thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/24—Addition to the formed paper during paper manufacture
    • D21H23/26—Addition to the formed paper during paper manufacture by selecting point of addition or moisture content of the paper

Landscapes

  • Paper (AREA)

Abstract

A method for improving RDF aids efficacy, paper machine performance and sheet properties formed during a papermaking process is disclosed. The methodology includes the following steps: (a) applying one or more RDF aids to the papermaking process to a point between after the headbox and on or before the first drainage element of a papermaking process.

Description

APPLICATION OF CHEMICAL AIDS AFTER A HEADBOX OF
A PAPERMAKING PROCESS
CROSS REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of U.S. Serial No. 12/274,682, which is herein incorporated by reference.
BACKGROUND OF THE INVENTION Sizing chemicals play an important role in the papermaking process, e.g. prevents the penetration of liquids into a paper sheet and/or improves the receipt of ink onto a paper sheet. A more efficacious way of applying sizing agents is sought by the papermaking industry.
SUMMARY OF THE INVENTION
The present invention provides for a method of applying one or more chemicals to a papermaking process comprising: applying said chemicals between a headbox slice opening and a first drainage element of said papermaking process, wherein said chemicals include at least one of the following: sizing chemicals; internal sizing chemicals; surface sizing chemicals; rosin; alkenyl succinic anhydride (ASA); alkyl ketene dimmer (AKD); styrene-maleic anhydride (SMA); and ethylene-acrylic acid (EAA).
The present invention also provides for a method of improving sheet and/or web properties formed from a cellulosic suspension of a papermaking process comprising: applying one or more chemicals between a headbox slice opening and a first drainage element of said papermaking process, wherein said chemicals are selected from the group consisting of: sizing chemicals, internal sizing chemicals, surface sizing chemicals, rosin, alkenyl succinic anhydride (ASA), alkyl ketene dimmer (AKD), styrene-maleic anhydride (SMA), and ethylene-acrylic acid (EAA); optionally performing one or more measurements of the sizing properties of a sheet and/or web of said papermaking process; optionally wherein a plurality of said measurements provide a cross-directional profile of said web and/or said sheet properties in said papermaking process; and optionally controlling said web and/or sheet properties by adjusting the application of said chemicals to the papermaking process in response to said one or more measurements.
The present invention also provides for a method to activate a papermaking process chemical program containing a plurality of chemical components that are applied to said papermaking process comprised of: applying a first chemical component before a headbox slice opening and wherein a second chemical component is applied between a headbox slice opening and a first drainage element of said papermaking process, wherein said first chemical component contains at least one of the following: sizing chemicals; internal sizing chemicals; surface sizing chemicals; rosi; alkenyl succinic anhydride (ASA); alkyl ketene dimmer (AKD); styrene-maleic anhydride (SMA); and ethylene-acrylic acid (EAA).
DETAILED DESCRIPTION OF THE INVENTION
Definitions:
"Papermaking process'V'papermaking processes" refer to a method(s) of making any kind of paper products (e.g. paper, tissue, board, etc.) from pulp comprising forming an aqueous cellulosic papermaking furnish, draining the furnish to form a sheet and drying the sheet. The steps of forming the papermaking furnish, draining and drying may be carried out in any manner known to those skilled in the art. The papermaking process/processes may also include a pulping stage, e.g. making pulp from wood and/or non-wood raw material and bleaching stage, e.g. chemical treatment of the pulp for brightness improvement.
"Wet end" refers to papermaking process operations in the approach system, sheet forming section and pressing section.
"Sheet'V'sheets" refer to sheet(s) formed as a result of or during a papermaking process/papermaking processes.
The selection and application scheme of sizing chemicals, which is appropriate for a papermaking process, would be appreciated by one of ordinary skill in the art. By choosing various sizing chemistries and schemes for applying these chemistries the sheets structural and/or physical properties can be controlled.
How much sizing chemicals are added to a papermaking process depends on various factors, which would be appreciated by one of ordinary skill in the art. For example, factors such as the type of papermaking process, e.g. board, paper sheet, or tissue may impact the amount of chemistry added to a papermaking process.
A. Effective Application of Sizing Chemicals
As stated above, the sizing chemicals are applied between a headbox slice opening and a first drainage element of a papermaking process.
In one embodiment, the chemicals are applied to a papermaking process location that is proximate to a headbox slice opening.
In a further embodiment, proximate refers to a distance from 0 cm to about 20 cm. In a further embodiment, proximate refers to a distance from 0 cm to about 10 cm.
In another embodiment, the papermaking process contains a foudrinier paper machine. In another embodiment, the papermaking process contains a gap forming paper machine. The application of the sizing chemicals to the papermaking process can take place in various ways, e.g. non-contact ways or through a non-contact applicator, which would be appreciated by one of ordinary skill in the art.
In one embodiment, the chemicals are applied to the papermaking process by a spray bar, optionally wherein the spray bar is installed onto a headbox top slice cover.
In another embodiment, the chemicals are applied to the papermaking process by a curtain applicator.
In another embodiment, the chemicals are applied to a papermaking process by using a slice blade, which is associated with the papermaking process.
In another embodiment, the methodology further comprises adding sizing chemicals to an additional area of the papermaking process aside from between a headbox slice opening and a first drainage element. These areas include typical application areas, including, but not limited to, the dilution headbox stream or channels inside the headbox installed hardware.
B. Improving Sheet and Web Quality
The application of sizing agents between a headbox slice opening and a first drainage element of said papermaking process can be utilized to improve sheet qualities, e.g. the improvement in sheet and/or web properties can result in a given amount of chemicals imparting a better sheet/web property compared to a situation when the chemicals are added only to an area before the free jet, e.g. into dilution lines leading to the headbox and/or the headbox itself.
This disclosure, therefore, can encompass a method of improving sheet and/or web properties formed from a cellulosic suspension of a papermaking process. The method comprises: applying one or more chemicals between a headbox slice opening and a first drainage element of said papermaking process, wherein said chemicals are selected from the group consisting of: sizing chemicals, internal sizing chemicals, surface sizing chemicals, rosin, alkenyl succinic anhydride (ASA), alkyl ketene dimmer (AKD), styrene-maleic anhydride (SMA), and ethylene-acrylic acid (EAA); optionally performing one or more measurements of the sizing properties of a sheet and/or web of said papermaking process; optionally wherein a plurality of said measurements provide a cross-directional profile of said web and/or said sheet properties in said papermaking process; and optionally controlling said web and/or sheet properties by adjusting the application of said chemicals to the papermaking process in response to said one or more measurements. In one embodiment, the chemicals are applied to a papermaking process location that is proximate to a headbox slice opening. In a further embodiment, proximate refers to a distance from 0 cm to about 20 cm. In a further embodiment, proximate refers to a distance from 0 cm to 10 cm.
In another embodiment, the chemicals are applied to a headbox free jet of a papermaking process. One of ordinary skill in the art would appreciate the scope of what is meant by a free jet of a papermaking process, e.g. a free jet is the fluid that flows out from the headbox, typically the free jet is 5 cm in length from the headbox and can be 2 cm in height, depending upon the slice opening that is associated with the headbox.
In another embodiment, the papermaking process contains a foudrinier paper machine.
In another embodiment, the papermaking process contains a gap forming paper machine.
The application of the chemicals to the papermaking process can take place in various ways, e.g. non-contact ways or through a non-contact applicator, which would be appreciated by one of ordinary skill in the art.
In one embodiment, the chemicals are applied to said papermaking process by a spray bar, optionally wherein the spray bar is installed onto a headbox top slice cover.
In another embodiment, the chemicals are applied to said papermaking process by a curtain applicator.
In another embodiment, the chemicals are applied to a papermaking process by using a slice blade, which is associated with the papermaking process.
In another embodiment, the methodology further comprises adding chemicals to an additional area of the papermaking process aside from between a headbox slice opening and a first drainage element. These areas include typical application areas, including, but not limited to, the dilution headbox stream or channels inside the headbox installed hardware of said papermaking process.
In another embodiment, the methodology provides for performing the measurement of the sizing properties of a forming section and/or formation properties of the sheet and/or web and optionally wherein a plurality of said measurement(s) provide a cross-directional profile of said web and/or said sheet properties in said papermaking process.
In a further embodiment, the plurality of measurements of the sheet properties (e.g. formation, ash, and air permeability) is practically done by taking a dry-sheet CD strip from the reel and the properties are measured in the lab.
In another embodiment, the web profile allows an operator to control the distribution of chemicals added to a web/sheet and pinpoint the application of chemical in one area over the other to produce a sheet that has an even application of chemicals, e.g. sizing chemicals, applied to it.
In a further embodiment, the basis weight CD profile is controlled.
In a further embodiment, the ash CD profile is controlled.
In a further embodiment, the sheet formation CD profile is controlled.
In a further embodiment, the sheet permeability CD profile is controlled.
C. Program Management
As stated above, the present invention also provides for a method to activate a papermaking process chemical program containing a plurality of chemical components that are applied to said papermaking process comprised of: applying a first chemical component before a headbox slice opening and wherein a second chemical component is applied between a headbox slice opening and a first drainage element of said papermaking process, wherein said first chemical component contains at least one of the following: sizing chemicals; internal sizing chemicals; surface sizing chemicals; rosin; alkenyl succinic anhydride (ASA); alkyl ketene dimmer (AKD); styrene-maleic anhydride (SMA); and ethylene-acrylic acid (EAA).
In one embodiment, the second chemical component is applied to a forming wire that contains a papermaking furnish and wherein said application is optionally applied across the whole forming wire width.
In another embodiment, the second component is at least one of the following: alum or
PAC.

Claims

CLAIMS We claim:
1. A method of applying one or more chemicals to a papermaking process comprising: applying said chemicals between a headbox slice opening and a first drainage element of said papermaking process, wherein said chemicals include at least one of the following: sizing chemicals; internal sizing chemicals; surface sizing chemicals; rosin; alkenyl succinic anhydride (ASA); alkyl ketene dimmer (AKD); styrene-maleic anhydride (SMA); and ethylene-acrylic acid (EAA).
2. The method of claim 1, wherein said chemicals are applied to a papermaking process location that is proximate to a headbox slice opening.
3. The method of claim 2, wherein said proximate refers to a distance from 0 cm to about 20 cm.
4. The method of claim 2, wherein said proximate refers to a distance from 0 cm to about 10 cm.
5. The method of claim 1 , wherein said papermaking process contains a foudrinier paper machine.
6. The method of claim 1 , wherein said papermaking process contains a gap forming paper machine.
7. The method of claim 1, wherein said chemicals are applied to said papermaking process by a spray bar, optionally wherein the spray bar is installed onto a headbox top slice cover.
8. The method of claim 1 , wherein said chemicals are applied to a papermaking process by using a slice blade, which is associated with the papermaking process.
9. A method of improving sheet and/or web properties formed from a cellulosic suspension of a papermaking process: applying one or more chemicals between a headbox slice opening and a first drainage element of said papermaking process, wherein said chemicals are selected from the group consisting of: sizing chemicals, internal sizing chemicals, surface sizing chemicals, rosin, alkenyl succinic anhydride (ASA); alkyl ketene dimmer (AKD), styrene-maleic anhydride (SMA), and ethylene-acrylic acid (EAA); optionally performing one or more measurements of the sizing properties of a sheet and/or web of said papermaking process; optionally wherein a plurality of said measurements provide a cross-directional profile of said web and/or said sheet properties in said papermaking process; and optionally controlling said web and/or sheet properties by adjusting the application of said chemicals to the papermaking process in response to said one or more measurements.
10. A method to activate a papermaking process chemical program containing a plurality of chemical components that are applied to said papermaking process comprised of:
applying a first chemical component before a headbox slice opening and wherein a second chemical component is applied between a headbox slice opening and a first drainage element of said papermaking process, wherein said first chemical component contains at least one of the following: sizing chemicals; internal sizing chemicals; surface sizing chemicals; rosin; alkenyl succinic anhydride (ASA); alkyl ketene dimmer (AKD); styrene-maleic anhydride (SMA); and ethylene-acrylic acid (EAA).
11. The method of claim 10, wherein said second chemical component is applied to a forming wire that contains a papermaking furnish and wherein said application is optionally applied across the whole forming wire width.
12. The method of claim 10, wherein said second component is at least one of the following: alum or PAC.
PCT/US2010/045116 2009-08-12 2010-08-11 Application of chemical aids after a headbox of a papermaking process WO2011019786A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/540,068 2009-08-12
US12/540,068 US20100122787A1 (en) 2008-11-20 2009-08-12 Application of chemical aids after a headbox of a papermaking process

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Publication Number Publication Date
WO2011019786A2 true WO2011019786A2 (en) 2011-02-17
WO2011019786A3 WO2011019786A3 (en) 2011-06-09

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2647761A1 (en) * 2012-04-02 2013-10-09 Metso Paper Inc. Method for influencing the hydrophobic properties of a fiber web in connection with production of the fiber web and production process for fiber webs and device for application of hydrophobic glue chemical to the fiber web

Citations (3)

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US6423183B1 (en) * 1997-12-24 2002-07-23 Kimberly-Clark Worldwide, Inc. Paper products and a method for applying a dye to cellulosic fibers
US20030056917A1 (en) * 2000-06-07 2003-03-27 Kimberly-Clark Worldwide, Inc. Paper products and methods for applying chemical additives to fibers in the manufacture of paper
US20030085009A1 (en) * 2001-11-05 2003-05-08 Capizzi Joseph George Method of using a nozzle apparatus for the application of the foam treatment of tissue webs

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US4152202A (en) * 1976-08-02 1979-05-01 Westvaco Corporation Method and apparatus for leveling the cross-direction profile of stock slurry on a paper machine
GB2252984A (en) * 1991-01-21 1992-08-26 Exxon Chemical Patents Inc Novel compositions and their use for sizing paper
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CA2116609C (en) * 1993-11-12 2003-09-09 Troy Alan Sprang Adsorbent fibrous nonwoven composite structure
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Publication number Priority date Publication date Assignee Title
US6423183B1 (en) * 1997-12-24 2002-07-23 Kimberly-Clark Worldwide, Inc. Paper products and a method for applying a dye to cellulosic fibers
US20030056917A1 (en) * 2000-06-07 2003-03-27 Kimberly-Clark Worldwide, Inc. Paper products and methods for applying chemical additives to fibers in the manufacture of paper
US20030085009A1 (en) * 2001-11-05 2003-05-08 Capizzi Joseph George Method of using a nozzle apparatus for the application of the foam treatment of tissue webs

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US20100122787A1 (en) 2010-05-20
WO2011019786A3 (en) 2011-06-09

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