EP2719826A1 - Verfahren zum Herstellen eines Fasernetzes und Anordnung zum Herstellen eines Fasernetzes - Google Patents

Verfahren zum Herstellen eines Fasernetzes und Anordnung zum Herstellen eines Fasernetzes Download PDF

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Publication number
EP2719826A1
EP2719826A1 EP12187736.9A EP12187736A EP2719826A1 EP 2719826 A1 EP2719826 A1 EP 2719826A1 EP 12187736 A EP12187736 A EP 12187736A EP 2719826 A1 EP2719826 A1 EP 2719826A1
Authority
EP
European Patent Office
Prior art keywords
starch
arrangement
sizing
web
fiber web
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP12187736.9A
Other languages
English (en)
French (fr)
Inventor
Topi Tynkkynen
Reijo PIETIKÄINEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valmet Technologies Oy
Original Assignee
Metso Paper Oy
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 Metso Paper Oy filed Critical Metso Paper Oy
Priority to EP12187736.9A priority Critical patent/EP2719826A1/de
Priority to CN201310467563.7A priority patent/CN103711038B/zh
Publication of EP2719826A1 publication Critical patent/EP2719826A1/de
Withdrawn legal-status Critical Current

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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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/54—Starch
    • 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
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • 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
    • D21H21/14—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 characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents
    • 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
    • D21H23/50—Spraying or projecting
    • 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
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls

Definitions

  • present invention relates to producing fiber web in a fiber web machine. More especially the present invention relates to a process according to preamble part of claim 1 and to an arrangement according to preamble part of claim 7.
  • a typical production and treatment line comprises a head box, a wire section and a press section as well as a subsequent drying section and a reel-up.
  • the production and treatment line can further comprise other devices and sections for finishing the fiber web, for example, a sizer, a calender, a coating section.
  • the production and treatment line also comprises at least one winder for forming customer rolls as well as a roll packaging apparatus.
  • fiber webs are meant for example paper and board webs.
  • sizing is used to alter the properties of a fiber web by adding sizing agents, for example glue chemicals.
  • Sizing can be divided to internal sizing and surface sizing.
  • internal sizing the sizing agent is added to pulp in the wet end of the fiber web machine before forming.
  • surface sizing the sizing agent is added onto the surface of the fiber web at the dry end of the fiber web machine.
  • Internal sizing is done in the beginning of the wet end of the fiber web machine by using different kinds of chemical treatments in order to influence the penetration of a liquid, for example of water into the fiber web.
  • surface sizing is used to alter the properties of a fiber web by adding sizing agents, for example starch or other glue chemicals.
  • sizing agents for example starch or other glue chemicals.
  • the sizing agent is added onto the surface of the fiber web at the dry end of the fiber web machine.
  • Surface sizing is used in production of many fiber web grades, for example of uncoated fine papers and of several board grades.
  • the sizing of paper and board web typically utilise a separate sizer. In connection with the sizer different kinds of sizing technology are employed in prior art arrangements, for example pond sizing technology or film transfer technology or spray sizing technology.
  • WO publication 03/004770 A1 discloses a further method for manufacturing a surface sized web of paper of paperboard, the method comprising a step of applying to at least one side of the web an aqueous furnish of size and according to the method the solids content of the size furnish being applied is at least 15% and the size furnish is applied to one side of the web by amount not greater than 5 g/m2 as aqueous furnish of size applied to the web.
  • applicator apparatus for the method disclosed the publication mentions spray applicators.
  • WO publication 2006/058961 A1 discloses a method and arrangement for processing a paper or board web or similar fiber web. In this prior art method a processing mixture is spread on the surface of the web with spray nozzles.
  • the web to be processed is lead from a press nip and between rolls in this nip. Before the web enters the nip such an amount of processing mixture is spread onto at least one side of the web that the processing mixture is still wet when it enters the nip.
  • the arrangement comprises at least one press nip, elements for taking the web to the press nip an elements for spreading the processing mixture and the element for spreading the processing mixture are spray nozzles which are arranged at an adjustable distance in the arrival direction of the web from the press nip to feed the processing mixture to at least one surface of the web.
  • the solid contents of the web In surface sizing with a size press for increasing the strength of the web the solid contents of the web must be sufficiently high in order to achieve good runnability of the web and infiltrating of cooked starch. Due to this the solid contents of the web are to be at least 90 % before surface sizing, which decreases the solid content level to 70 % or even below. Low solid content of the web raises runnability problems and may cause web breaks.
  • a process of coating paper in the form of a web or sheet which comprises applying thereto an aqueous slurry containing raw starch and contacting the wet coated paper with steam.
  • the aqueous slurry may also contain a pigment and the coated paper is subjected to sufficient heat without substantial drying to gelatinize the starch and the coated paper is dried and finished.
  • the heating of the coated paper to gelatinizing temperature of the starch is performed in the presence of sufficient moisture to effect the gelatinization of the starch.
  • the wet coated paper may be contacted with steam or with saturated or slightly superheated steam. In this process only raw starch is used as binding agent in coatings.
  • DE patent application publication 102008040057 is disclosed a process for surface treatment, preferably for surface sizing, of material web, preferably paper or board.
  • the process comprises applying a starch containing surface treatment agent as a pre-dosed film on assigned surface of the material web using a film applying device.
  • the starch is a thermally-chemically modified starch and the solid content of the surface treatment agent is reduced, when compared to native starch viscosity.
  • the object is to decrease the need for drying of the material web after the surface sizing.
  • sizing agent in the internal sizing at highest about 2 % of sizing agent can be added since too high amount of sixing agent added at the wet end lowers the drying properties of the web as the moisture infiltrates into the starch granules during drying.
  • native i.e. raw i.e. uncooked starch in internal sizing but its retention is rather low as mentioned only up to 2 %. For improving the retention agents are used.
  • Native starch is used as sizing agent in single webs but it can also be used in multilayer forming to improve the adherence of layers.
  • the capability of native starch to form hydrogen bonds is based on the presence of heat and moisture, which swell the starch granules, whereby the infiltrated moisture creates hydrogen bonds. By the heat also the moisture is evaporated and the stabile bonds are created as the starch dries.
  • An object of the invention is to create a process for producing fiber web and an arrangement for producing fiber web, in which the problems and disadvantages of prior art are eliminated or at least minimized.
  • inventive process is mainly characterized by the features of claim 1.
  • inventive arrangement in turn is mainly characterized by the features of claim 7.
  • the fiber web by surface sizing of the web sizing agent is applied onto the fiber web, which sizing agent comprises a mixture of at least two different starch solutions, which mixture comprises at least a starch solution with high viscosity and a starch solution with low viscosity.
  • the starch mixture has low viscosity, advantageously less than 100 mPas (Br100) which improves the sizing of starch mixture of high starch content, for example starch content is 8-20 % solids content.
  • the mixture comprises as one starch solution native i.e. uncooked i.e. raw starch and water.
  • the sizing agent mixture preferably comprises a native i.e. uncooked starch solution and a cooked starch solution.
  • a native starch solution is native starch and 30-70 % of the starch content is cooked starch.
  • the temperature of the mixture in sizing is held below the gelatinization temperature of 30-55 °C.
  • uncooked starch is modified, oxygenized or enzymatically converted cooked starch.
  • the size content of the web can be adjusted in the thickness direction of the web.
  • starch solutions may also function as carrier agent for hydrophilic agents, optical brighteners etc. in case in particular the surface properties of the web are to be modified.
  • the sizing agent may also comprise fines for improving or pigmenting the surface of the web.
  • the sizing agent mixture comprises a native i.e. uncooked starch solution and a cooked solution.
  • the native starch is dispersed into a lye solution of 0,1 - 0,5 %.
  • the gelatinization temperature of native starch is lowered to a desired level and a fast reaction and early gelatinization is achieved thus creating a longer time, more moisture and more heat for sizing reaction.
  • the viscosity is adjusted.
  • mixture of pearl starch, borax, caustic soda and water can be suspended in a paste of cooked starch.
  • the addition of caustic soda helps gelatinize the starch.
  • the primary value of borax is to buffer the caustic soda present in the formula. It also provides viscosity control and adds tack to the finished adhesive.
  • 15-20 % of the starch is fully cooked in part of the water with caustic to provide a carrier for the pearl starch.
  • Starch solids levels usually are 23-35 % to achieve finished adhesive viscosity of 30-50 Stein Hall seconds.
  • the arrangement for producing fiber web comprises means to apply sizing agent that comprises partially native starch on the surface of the fiber web and means for heating and/or drying the web.
  • the means to apply sizing agent are micro jet or film or bond or spray sizing means.
  • the means for drying and/or heating are belt and/or cylinder and/or infra and/or air-borne and/or steam and/or other drying means in such known to one skilled in the art.
  • a heated belt nip or roll nip is used for gelatinization of starch before drying.
  • a blade or a rod is located after means to apply sizing agent that is a mixture of at least two different starch solutions for smoothening the applied sizing agent.
  • the arrangement comprises means for applying the native starch solution directly after sizing, for example the arrangement comprises a spray device without nip.
  • the location of the means to apply sizing agent that comprises partially native starch are located at wire section, at press section or at drying section of the fiber web production line.
  • the means to apply sizing agent could even be located at head box section, for example the means to apply sizing agent could be a water jet of a double (twin) head box.
  • the invention can be utilized in production of different fiber web grades, for example container boards.
  • the fiber web is advantageously already internally sized.
  • strength and/or surface strength and/or rigidity of the web can be optimized by rationing the starch solutions, for example raw material costs can be decreased by using bigger ratio of native starch that is less expensive than cooked starch and for example the surface of the web can be modified by filling and/or coating and/or sizing it by native starch.
  • the sizing agent is applied in or directly before a treatment zone in which the web is threated by pressure and heat.
  • the sizing agent is applied by a spray sizing device or corresponding spraying device and the web is guided into a nip formed between a roll or a cylinder and a belt, advantageously a metal belt.
  • the surface pressure of the belt provides for the sizing agent to penetrate into the web.
  • the belt provides for heating of the web surface, by which the moisture evaporates and rises the temperature of the sizing agent over the gelatinization temperature. The moisture evaporation also provides for the sizing agent to penetrate further into the web.
  • the web is surface sized on at least one surface during closed web transfer, with sizing agent mixture of at least two different starch solutions as explained above.
  • the belt can be heated or not heated and also the roll or the cylinder can provide for the heat.
  • the web can be supported by a fabric and one-sidedness created by the fabric can be used in creating the properties of the final fiber web product or it can be modified by coating and/or calendering.
  • the fabric can also be porous such that is receives moisture.
  • the fabric can also be provided with a coating for decreasing adherence of the web.
  • the roll or the cylinder can also be provided with suction for increasing the moisture removal and penetrating of the sizing agent.
  • the location of the sizing means and the treatment zone can be for example in connection with a press section, a drying section, a metal belt drying device, a sizing press, a calender or a reel-up of the fiber web production line.
  • the sizing agent mixture comprising at least two starch solutions is applied onto the web before drying section of the fiber web production line such that the solid content of the fiber web after applying the sizing agent is below 80% and thus there is high amount of moisture which as it evaporates due to the heat of a treatment zone in which the web is threated by pressure and heat the sizing agent is activated.
  • the temperature in the treatment zone is such that the gelatinization temperature is reached, for example 60-85 °C, advantageously 80-100 °C, and also the drying is efficient and bonds are created is the sizing agent and the strength properties of the web are improved.
  • the treatment time in the treatment zone is advantageously over 50 ms and the surface pressure in the treatment zone is 20 - 500 kPa, in case where metal belt is used and 2 - 20 kPa if a fabric is used.
  • a cooling device may follow the treatment zone.
  • FIG 1 is schematically shown an example of cooking and mixing of starch.
  • FIG. 1 At left side of the figure is shown how the microstructure of starch changes as the temperature increases and decreases and as how the properties of the starch develop during the cooking and mixing of the starch.
  • the viscosity increases and starch chains associate.
  • two starch solutions are mixed one with high viscosity at temperature of 20 °C from uncooked stage 30 and one with low viscosity at temperature of 95 °C from cooked stage 40 and mixed in mixing stage 50 with temperature of 55 °C.
  • the starch agent as mixture of the two starch solution are applied in sizing process 60, in which by the energy obtained from the fiber web and from drying in drying stage the starch is gelatinized and strong bonding is created.
  • the solutions of native and cooked starch in stages 30, 40 into the native starch is dispersed into a lye solution of 0,1 - 0,5 % (NaOH).
  • the gelatinization temperature of native starch is lowered to a desired level of 60 °C and a fast reaction and early gelatinization is achieved thus creating a longer time, more moisture and more heat for sizing reaction.
  • Figures 2A - 2G show schematically examples of starch microstructure during corn starch gelling process when the temperature increases from 30 °C to 90 °C. As can be seen from the figures first the starch begins to swell and from the gelling temperatures of about 65 °C the dispersing begins.
  • the fiber web W is supported by a fabric F.
  • the fiber web sizing agent mixture comprising at least two starch solutions is applied by a sizing device 11 after which the web is guided into a nip or treatment zone formed in between a heated cylinder 10 and a belt B.
  • the guide rolls 13 guide the belt B and by a roll 12 further pressure is provided in the treatment zone.
  • the fiber web sizing agent mixture comprising at least two starch solutions is applied by a sizing devices 11 after which the web is guided into a nip or treatment zone formed in between a heated cylinder 10 and a belt B.
  • the guide rolls 13 guide the belt B.
  • the example comprises three sizing devices 11 and three treatment zones.

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  • Paper (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
EP12187736.9A 2012-10-09 2012-10-09 Verfahren zum Herstellen eines Fasernetzes und Anordnung zum Herstellen eines Fasernetzes Withdrawn EP2719826A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12187736.9A EP2719826A1 (de) 2012-10-09 2012-10-09 Verfahren zum Herstellen eines Fasernetzes und Anordnung zum Herstellen eines Fasernetzes
CN201310467563.7A CN103711038B (zh) 2012-10-09 2013-10-09 制造纤维幅材的方法和制造纤维幅材的配置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12187736.9A EP2719826A1 (de) 2012-10-09 2012-10-09 Verfahren zum Herstellen eines Fasernetzes und Anordnung zum Herstellen eines Fasernetzes

Publications (1)

Publication Number Publication Date
EP2719826A1 true EP2719826A1 (de) 2014-04-16

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EP12187736.9A Withdrawn EP2719826A1 (de) 2012-10-09 2012-10-09 Verfahren zum Herstellen eines Fasernetzes und Anordnung zum Herstellen eines Fasernetzes

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EP (1) EP2719826A1 (de)
CN (1) CN103711038B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3617403B1 (de) * 2018-08-30 2021-09-01 Valmet Technologies Oy Verfahren zur behandlung eines faservlieses und behandlungssystem zur behandlung eines faservlieses
FI20185867A1 (fi) * 2018-10-15 2020-04-16 Valmet Technologies Oy Menetelmä monikerrosrainan liimaamiseksi ja muodostusosa monikerrosrainaa varten
EP3910103A1 (de) * 2020-05-15 2021-11-17 Valmet Technologies Oy Verfahren und vorrichtung zum aufbringen einer substanzschicht auf eine bewegte faserbahn durch schaumauftrag

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB333226A (en) 1929-05-03 1930-08-05 Champion Coated Paper Co Coating paper
JPH05195489A (ja) * 1992-01-22 1993-08-03 Honen Corp 紙塗工用澱粉組成物
US5340405A (en) * 1993-06-14 1994-08-23 National Starch And Chemical Investment Holding Corporation High solids liquid starch prepared by batch cooking
US5972167A (en) * 1993-11-16 1999-10-26 Nippon Paper Industries Co., Ltd. Transfer roll coating color and a coated paper
WO2003004770A1 (en) 2001-07-03 2003-01-16 Metso Paper, Inc. Method for producing sized paper or cardboard
WO2003018638A1 (en) * 2001-08-28 2003-03-06 Raisio Chemicals Ltd Method for modification of starch, starch and its use
WO2004074367A1 (en) * 1999-03-08 2004-09-02 Valerie Ann Bailey Melt processable starch compositions
WO2006058961A1 (en) 2004-12-01 2006-06-08 Metso Paper, Inc. Method and apparatus for treating a fibre web
WO2009047233A1 (de) * 2007-10-08 2009-04-16 Basf Se Wässrige polymerdispersionen auf basis von copolymerisaten aus vinylaromaten und konjugierten aliphatischen dienen, verfahren zu ihrer herstellung und ihre verwendung
DE102008040057A1 (de) 2008-07-01 2010-01-07 Voith Patent Gmbh Verfahren zur Oberflächenbehandlung, insbesondere Oberflächenleimung, mit einem thermisch-chemisch modifizierte Stärke enthaltenden Oberflächenbehandlungsmittel
US20100159104A1 (en) * 2006-03-21 2010-06-24 Roquette Freres Method for cooking a starchy material with a high content of dry matter for the preparation of an adhesive composition
US8088209B2 (en) * 2003-07-08 2012-01-03 Roquette Freres Cationic liquid starchy composition and uses thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ508191A (en) * 1999-11-23 2002-03-28 Nat Starch Chem Invest A method of modulating surface sizing properties such as porosity reduction, resistance to liquid penetration and surface strength when used as surface size on paper
US7381300B2 (en) * 2006-10-31 2008-06-03 International Paper Company Process for manufacturing paper and paperboard products

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB333226A (en) 1929-05-03 1930-08-05 Champion Coated Paper Co Coating paper
JPH05195489A (ja) * 1992-01-22 1993-08-03 Honen Corp 紙塗工用澱粉組成物
US5340405A (en) * 1993-06-14 1994-08-23 National Starch And Chemical Investment Holding Corporation High solids liquid starch prepared by batch cooking
US5972167A (en) * 1993-11-16 1999-10-26 Nippon Paper Industries Co., Ltd. Transfer roll coating color and a coated paper
WO2004074367A1 (en) * 1999-03-08 2004-09-02 Valerie Ann Bailey Melt processable starch compositions
WO2003004770A1 (en) 2001-07-03 2003-01-16 Metso Paper, Inc. Method for producing sized paper or cardboard
WO2003018638A1 (en) * 2001-08-28 2003-03-06 Raisio Chemicals Ltd Method for modification of starch, starch and its use
US8088209B2 (en) * 2003-07-08 2012-01-03 Roquette Freres Cationic liquid starchy composition and uses thereof
WO2006058961A1 (en) 2004-12-01 2006-06-08 Metso Paper, Inc. Method and apparatus for treating a fibre web
US20100159104A1 (en) * 2006-03-21 2010-06-24 Roquette Freres Method for cooking a starchy material with a high content of dry matter for the preparation of an adhesive composition
WO2009047233A1 (de) * 2007-10-08 2009-04-16 Basf Se Wässrige polymerdispersionen auf basis von copolymerisaten aus vinylaromaten und konjugierten aliphatischen dienen, verfahren zu ihrer herstellung und ihre verwendung
DE102008040057A1 (de) 2008-07-01 2010-01-07 Voith Patent Gmbh Verfahren zur Oberflächenbehandlung, insbesondere Oberflächenleimung, mit einem thermisch-chemisch modifizierte Stärke enthaltenden Oberflächenbehandlungsmittel

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Publication number Publication date
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CN103711038B (zh) 2016-06-01

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