WO2003004768A1 - Papier d'impression et son procede de fabrication - Google Patents

Papier d'impression et son procede de fabrication Download PDF

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Publication number
WO2003004768A1
WO2003004768A1 PCT/FI2002/000580 FI0200580W WO03004768A1 WO 2003004768 A1 WO2003004768 A1 WO 2003004768A1 FI 0200580 W FI0200580 W FI 0200580W WO 03004768 A1 WO03004768 A1 WO 03004768A1
Authority
WO
WIPO (PCT)
Prior art keywords
paper
surface sizing
base paper
printing
printing paper
Prior art date
Application number
PCT/FI2002/000580
Other languages
English (en)
Inventor
Timo Koskinen
Pekka Aho
Seppo SÄRELÄ
Original Assignee
Upm-Kymmene Corporation
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 Upm-Kymmene Corporation filed Critical Upm-Kymmene Corporation
Priority to GB0329167A priority Critical patent/GB2397309A/en
Priority to DE10296949T priority patent/DE10296949T5/de
Publication of WO2003004768A1 publication Critical patent/WO2003004768A1/fr
Priority to US10/747,810 priority patent/US20040200593A1/en

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • 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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/08—Mechanical or thermomechanical pulp
    • 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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/14—Secondary fibres
    • 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
    • D21H23/30—Pretreatment of the paper

Definitions

  • the present invention relates to a method for manufacturing a printing paper.
  • the method comprises the surface sizing and calendering of base paper containing mechanical pulp and/or recycled fibre.
  • the invention also relates to surface-sized printing paper, in which the base paper contains mechanical pulp and/or recycled fibre and filler 10 to 40 wt-% of the total fibre content, the surface roughness of the printing paper being 2.0 ⁇ m at the highest (PPS-10 method).
  • Publication US 3,982,056 discloses a paper coated on one side, the printability of which paper is improved by moistening the uncoated side of the paper and conveying the paper thereafter to a gloss calender, in which the coated side is brought in contact with the smooth surface of a hot roll.
  • the aim is to obtain printing properties of similar quality than those of supercalendered paper.
  • Publication US 6,013,359 discloses a printing paper, especially a newsprint coated either with polyacrylamide or acrylamide/metacrylamide copolymer.
  • the amount of coating is 0.01 to 0.2 g/m 2 per side. After the coating process the paper is supercalendered.
  • the printing paper according to the invention is characterized in that the amount of surface treatment agent is under 2.0 g/m 2 per side.
  • the method according to the invention is characterized in that the base paper is calendered before surface sizing in a calender that comprises at least one nip that is formed between a hard-faced roll and a soft-faced roll.
  • a priting paper is attained the properties of which are better than those of conventional supercalendered paper, and the paper according to the invention can be utilized to replace known coated paper grades, such as LWC paper.
  • the printing paper according to the invention can be printed by offset with printing inks used in connection with LWC papers. It is also possible to use so-called dry offset method when printing said paper.
  • the above- mentioned advantages of printing paper are mainly based on the good dry surface strength of paper attained by means of the method according to the invention.
  • the consumption of the surface treatment agent is very small.
  • the need for drying the paper is very small as well.
  • the advantage of gravure papers is that the pores of the printing paper manufactured with the method according to the invention are closed in such a manner that the evenness of absorption of the printing ink is improved.
  • coated printing papers can be at least partly replaced with uncoated, surface-sized printing paper manufactured by means of the method according to the invention, investments in the papermaking line in connection with surface sizing are small when compared to investments required by coated printing papers.
  • the basic idea of the method according to the invention is to calender the base paper before coating the same with the surface sizing agent so that the base paper obtains such a smooth and pore-free structure that as small amount of surface sizing agent as possible is consumed, and nevertheless, a printing paper with good printing properties is obtained.
  • the paper according to the invention can be used both as an offset paper and gravure paper.
  • the raw material content of the base paper can correspond to typical supercalendered (SC) printing paper.
  • the fibre content of the base paper is typically 70 to 90 % by weight of mechanical pulp, such as groundwood or refiner groundwood, and 10 to 30% by weight of pulp. Part of the mechanical pulp can be replaced with recycled fibres.
  • the fibre content can contain 15 to 40 % by weight of filler, such as clay mineral, talc or calcium carbonate.
  • the grammage typically varies between 39 to 80 g/m 2 .
  • the base paper can also be such paper that comprises mechanical pulp and/or recycled fibre over 90% by weight, advantageously over 95% by weight of the total fibre content of paper.
  • the fibre content of the base paper may also consist entirely of mechanical pulp and/or recycled fibre. Because the use of chemical pulp in paper improves for example the strength properties of the paper, the use of fillers, in turn, weakens the paper, as the amount of chemical pulp is reduced, the amount of filler is advantageously also smaller, for example 10 to 15 % by weight of the fibre content.
  • the base paper is calendered before it is coated with the surface sizing agent in such a manner that the surface roughness is typically 1.0 to 1.3 ⁇ m.
  • the calendered base paper is coated with a surface sizing agent that is used 3.0 g/m 2 per side, advantageously under 2.0 g/m 2 per side, most advantageously 0.5 to 1.5 g/m 2 per side.
  • the amount of 0.5 g/m 2 per side is not necessarily the minimum value of the most advantageous area, but the minimum value can be even 0.3 g/m 2 per side.
  • Advantageous results have been attained for example in the range of 0.3 to 1.0 g/m 2 per side.
  • the presented amounts of surface sizing agent represent dry matter contents.
  • the base paper is first treated with a calendering treatment to reduce the surface roughness. Thereafter the base paper is surface sized with a surface sizing agent, and the attained surface-sized paper is calendered again lightly so that a suitable smoothness of the surface is attained after the surface sizing.
  • the surface sizing agent is substantially free of mineral substances, such as kaolin. Suitable surface sizing agents include water-soluble adhesives, such as carboxy-methyl cellulose (CMC) or starch, different kinds of latexes, different kinds of waxes and mixtures of the above-mentioned agents.
  • starch Especially the mixtures of starch and some other agents such as plastic pigments (for example styrene/acrylic copolymer particles, particle diameter 1.0 ⁇ m, such as Ropaque HP-1055, Rohm & Haas), styrene/acrylate latex or styrene/butadiene latex are especially advantageous in relation to the printability of offset paper.
  • plastic pigments for example styrene/acrylic copolymer particles, particle diameter 1.0 ⁇ m, such as Ropaque HP-1055, Rohm & Haas
  • styrene/acrylate latex or styrene/butadiene latex are especially advantageous in relation to the printability of offset paper.
  • starch is an especially advantageous option as a surface sizing agent.
  • the base paper is calendered before it is surface sized with the surface sizing agent in a calender with more than one nip.
  • the calender comprises at least one nip that is formed between a hard-faced roll and a soft counter surface.
  • the hard-faced roll is typically a heated metal roll.
  • the soft counter surface can be for example a roll with a paper surface, a roll with an elastic surface, a belt or a shoe roll.
  • the surface of an elastic roll is typically composed of a polymer surface.
  • the calendering is conducted in a supercalender or multinip calender.
  • the term super- calender refers to a calender with several nips in which hard and soft rolls alternate.
  • the supercalender may also contain nips, typically only one, in which the nip is composed between two soft-faced rolls.
  • the soft roll can be a roll with a paper surface (filled roll), or a resilient roll with a polymer surface.
  • the same calender may contain both rolls with a paper surface and rolls with a polymer surface.
  • the supercalender typically comprises 9 to 12 rolls.
  • the supercalender is typically an off-line calender.
  • multinip calender refers to calenders that contain several nips and that comprise nips formed between a hard-faced heated roll and a roll with an elastic surface.
  • the roll with an elastic surface is typically a polymer coated roll.
  • the multinip calenders can be on-line or off-line calenders.
  • Such calenders include for example Janus calenders (Voith- Sulzer) Prosoft calenders (K ⁇ sters-Beloit) ans OptiLoad calenders (Metso Paper).
  • the base paper whose surface roughness after calendering is typically 1.0 to 1.3 ⁇ m, is surface sized with a surface sizing agent.
  • the surface sizing is typically two-sided.
  • the surface sizing is advantageously conducted as film coating.
  • the concept of film coating refers to all such methods in which a determined amount of surface sizing agent is portioned in a suitable manner on the surface or the roll, and the surface sizing agent is transferred from the surface of the roll on the surface of the base paper.
  • Another alternative is spray coating, and surprisingly, it was detected that blade coating is also suitable to be used in the method according to the invention, although earlier it was not possible to use blade coating in surface sizing by methods of prior art because of the tendency of the web to break. Gravure coating is also a suitable method.
  • the printing paper is dried and calendered to restore the smoothness of the surface after surface sizing, advantageously the printing paper is treated lightly in a calender with one or two nips.
  • the calender advantageoulsy comprises a nip that is formed between a hard- faced roll and a soft-faced roll.
  • the manufacturing line of the printing paper according to the invention can be for example the following.
  • the base paper can consist of normal supercalendered paper (SC) which has already been treated in a super- calender or in a multinip calender into a suitable surface roughness.
  • SC supercalendered paper
  • the base paper is unwound from the reel in the beginning of the surface sizing line and it is surface sized with a surface sizing agent for example in a film coating unit or blade coating unit.
  • the surface sizing agent is dried and the printing paper is calendered in a calender with one or two nips. Thereafter the printing paper that is surface-sized with surface sizing agent is reeled up.
  • the devices necessary for surface sizing and drying can also be added in connection with the calender.
  • the calendered paper is conveyed from the calender to the surface sizing and drying, whereafter it is calendered lightly in a calender with one or two nips.
  • printing paper with a maximum surface roughness of 2.0 ⁇ m is advantageously manufactured.
  • the surface roughness is under 2.0 ⁇ m, advantageously it is 1.0 to 1.2 ⁇ m.
  • the density of printing paper is typically at least 900 kg/m 3 .
  • aqueous acrylic copolymer dispersion (Baso- plast 335 D, BASF AG) was used as surface sizing agent, in samples 03 and 04 carboxy-methyl cellulose (in sample 03 Finnfix 10, Noviant Oy, in sample 04 Finnfix 5, Noviant Oy), in samples 05 ja 06 starch (Raisamyl 404N, Raisio Chemicals Oy) ja in samples 07 ja 08 cationic wax dispersion (Raibond 23 CA, Raisio Chemicals Oy).
  • Table 1 The test results are shown in Table 1.
  • samples 09 to 016 that are examples of papers surface sized with a surface sizing agent after calendering
  • calendered paper was used as base paper. After coating the paper was calendered only lightly.
  • the cal- endering humidity was 5.5 to 6.0%, the number of nips was 2, the temperature of the heated rolls 75°C and the nip pressure 200 kN/m.
  • the surface sizing agents were in sample 09 aqueous acrylic copolymer dispersion (Basoplast 335 D, BASF AG), in sample 010 carboxy-methyl cellulose (Finnfix 5, Noviant Oy), in sample 011 starch (Raisamyl 404 N, Raisio Chemicals Oy), in sample 012 cationic wax dispersion (Raibond 23 CA, Raisio Chemicals Oy), in sample 013 a mixture of carboxy-methyl cellulose and acrylic copolymer dispersion (Finnfix 5 and Basoplast 335 D), in sample 014 a mixture of starch and acrylic copolymer dispersion (Raisamyl 404 N and Basoplast 335 D), in sample 015 a mixture of starch and styrene acrylate latex (Raisamyl 404 N and XZ 94329.02, DOW Oy) and in sample 016 a mixture of starch and styrene butadiene late
  • the printing properties of offset printing papers manufactured by means of the method according to the invention were examined in samples manu- factured in pilot scale.
  • the base paper in the samples OP1 to OP16 was supercalendered 56g/m 2 paper.
  • the samples Ref. 1 and Ref. 2 are reference samples.
  • Ref. 1 is LWC paper intended for offset printing and
  • Ref. 2 is SC paper intended for off- set printing.
  • the surface treatment agent is wax dispersion (Raibond 35 CA), in samples OP3 and OP4 carboxy-methyl cellulose (Finnfix 5), in samples OP5 and OP6 cationic surface sizing starch (Raisamyl 404 N), in samples OP7 and OP8 a mixture of starch and acrylic copolymer dispersion in a ratio of 80/20% by weight (Raisamyl 404 N and Basoplast 335 D), in samples OP9 and OP10 a mixture of starch and styrene/butadiene latex in a ratio of 80/20 % by weight (Raisamyl 404 N and DL 966), in samples OP11 ja OP12 a mixture of starch and styrene/acrylate latex in
  • Samples Ref. 3 and Ref. 4 and Ref. 5 are reference samples that are manufactured by conventional methods to be used as gravure papers.
  • Ref 3 is 52 g/m 2 SC-paper
  • Ref .4 is 56 g/m 2 SC-paper
  • Ref.5 is 51 g/m 2 LWC-paper.
  • PPS 10) surface roughness
  • the paper was calendered in two nips, the temperature was 75°C and the pressure 4 MPa.
  • the paper was surface sized in a blade coating unit in a laboratory in such a manner that only one side of the paper was surface sized.
  • the surface sizing agent was only water, in sample R2 carboxy-methyl cellolose (Finnfix 5, Noviant Oy), in sample R3 cationic wax dispersion (Raibond 35 CA, Raisio Chemicals Oy), in sample R4 a mixture of carboxy-methyl cellulose and cationic wax dispersion (Finnfix 5 and Raibond 35 CA in a ratio of 50% / 50%), in sample R5 a mixture of carboxy-methyl cellulose (Finnfix 5) and polyethylene glykol in a ratio of 50 % / 50 % and in sample R6 a mixture of carboxy methyl cellulose (Finnfix 5) and basic paste in a ratio of 50 % / 50 %.
  • the basic paste contains 55 parts of talc, 45 parts of kaoline and 5.5 parts of polyvinyl acetate acrylate latex, in which the acrylate is butylacrylate (Raisional 388, Raisio Chemicals Oy).
  • the target pH in the surface treatment agent of sample R6 was 9.5.
  • the results of the tests are shown in tables 4 to 6.
  • the absorption values of the printing paper manufactured by means of the method according to the invention were considerably reduced when compared to the reference sample. The reduction in the values was at least 75 %.
  • the tensile index remained the same or improved slightly when compared to conventional supercalendered gravure paper, the tensile energy absorption index, in turn, was significantly improved.
  • the tear index was dependent on the surface sizing agent that was used, and it was at its highest when cationic wax dispersion was used as surface sizing agent, said wax dispersion being an aqueous mixture of starch and calcium stearate. The amount of starch in the wax dispersion was 10 %.
  • the effect of the surface sizing agent on the optical properties was moni- tored by measuring brightness and opacity.
  • the brightness was dependent on the chemical that was used.
  • the surface sizing agent did not have much effect on opacity.
  • Table 6 shows the results of the printability of the printing paper according to the invention.
  • gravure tests a GRI gravure machine, Shell Cup S2 ink viscosity measurement and black test ink (Sun Chemical) were used.
  • the printing ink was manufactured in such a manner that 700 ml of toluene was added in 1800 grammes of test ink supplied by the factory.
  • the viscosity was measured with a viscometer and time measurement. The time should be 25 seconds.
  • the printing ink was poured in a water container.
  • the sample was attached on a printing base and it was printed.
  • the results show that the tone level of the printing ink and the gloss of the print are improved when the method according to the invention is used in the manufacture.
  • the amount of missing dots largely depends on the surface sizing agent that is used.
  • the structure of the paper coated with surface sizing agent is very closed, because print through is reduced.
  • the results obtained from the air permeance, water penetration speed and printing ink absorption also refer to the closed quality of the surface.
  • the act of supplementing the sample R6 with a mineral agent did not result in considerable advantages in the printing properties.
  • the invention is not restricted to the description above, but it may vary within the scope of the claims.
  • the main aspect in the present invention is that by calendering the base paper sufficiently before surface sizing in such a manner that a permanent change in the surface roughness is attained, it is possible to attain printing paper with good quality with only a small amount of surface sizing agent.
  • a suitable surface sizing agent it is possible to make the printing paper suitable for offset or gravure printing.

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  • Paper (AREA)

Abstract

Procédé servant à fabriquer du papier d'impression dont le papier de base contient de la pâte mécanique et/ou des fibres recyclées. Ce procédé englobe également l'encollage de surface et le calandrage du papier de base. Ce procédé consiste à calandrer le papier de base avant l'encollage de surface dans une calandre comportant au moins un pincement situé entre un rouleau à face dure et une contre-surface molle. L'invention concerne également un papier d'impression fabriqué au moyen de ce procédé.
PCT/FI2002/000580 2001-07-02 2002-06-28 Papier d'impression et son procede de fabrication WO2003004768A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB0329167A GB2397309A (en) 2001-07-02 2002-06-28 Printing paper and a method for its manufacture
DE10296949T DE10296949T5 (de) 2001-07-02 2002-06-28 Druckpapier und Verfahren zu seiner Herstellung
US10/747,810 US20040200593A1 (en) 2001-07-02 2003-12-29 Printing paper and a method for manufacturing the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20011429A FI20011429A0 (fi) 2001-07-02 2001-07-02 Painopaperi ja menetelmä sen valmistamiseksi
FI20011429 2001-07-02

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/747,810 Continuation US20040200593A1 (en) 2001-07-02 2003-12-29 Printing paper and a method for manufacturing the same

Publications (1)

Publication Number Publication Date
WO2003004768A1 true WO2003004768A1 (fr) 2003-01-16

Family

ID=8561557

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2002/000580 WO2003004768A1 (fr) 2001-07-02 2002-06-28 Papier d'impression et son procede de fabrication

Country Status (5)

Country Link
US (1) US20040200593A1 (fr)
DE (1) DE10296949T5 (fr)
FI (1) FI20011429A0 (fr)
GB (1) GB2397309A (fr)
WO (1) WO2003004768A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010018302A1 (fr) 2008-08-11 2010-02-18 Upm-Kymmene Corporation Procédé de fabrication de papier d'impression
US8349443B2 (en) 2006-02-23 2013-01-08 Meadwestvaco Corporation Method for treating a substrate
US11051937B2 (en) 2015-07-14 2021-07-06 Edwards Lifesciences Corporation Prosthetic heart valve

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
US7691231B2 (en) * 2003-07-07 2010-04-06 Nippon Paper Industries Co., Ltd. Newsprint paper treated with cationic surface sizing agent
SE535270C2 (sv) * 2010-08-12 2012-06-12 Stora Enso Oyj En metod för ytbehandling av papper eller kartong
EP2701920B1 (fr) 2011-04-28 2016-07-27 Hewlett-Packard Development Company, L.P. Support utilisé lors de l'impression par presse à bobines à jet d'encre à vitesse élevée numérique
FI124859B (fi) * 2011-06-21 2015-02-27 Upm Kymmene Corp Painopaperituote sekä menetelmä ja järjestelmä painopaperituotteen valmistamiseksi
WO2024040257A2 (fr) * 2022-08-18 2024-02-22 J & J Green Paper, Inc. Ustensiles en papier étanches à l'eau et procédé de fabrication d'ustensiles en papier étanches à l'eau

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JPH0411090A (ja) * 1990-04-26 1992-01-16 Oji Paper Co Ltd オフセット用印刷用紙の製造方法
WO2000055424A1 (fr) * 1999-03-12 2000-09-21 Metso Paper, Inc. Procede et dispositif permettant de fabriquer du papier couche, et papier couche
WO2001098585A1 (fr) * 2000-06-20 2001-12-27 Metso Paper, Inc. Procede de calandrage, plus specifiquement de precalandrage et calandre permettant de mettre en oeuvre ledit procede

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JPH0411090A (ja) * 1990-04-26 1992-01-16 Oji Paper Co Ltd オフセット用印刷用紙の製造方法
WO2000055424A1 (fr) * 1999-03-12 2000-09-21 Metso Paper, Inc. Procede et dispositif permettant de fabriquer du papier couche, et papier couche
WO2001098585A1 (fr) * 2000-06-20 2001-12-27 Metso Paper, Inc. Procede de calandrage, plus specifiquement de precalandrage et calandre permettant de mettre en oeuvre ledit procede

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8349443B2 (en) 2006-02-23 2013-01-08 Meadwestvaco Corporation Method for treating a substrate
US8673398B2 (en) 2006-02-23 2014-03-18 Meadwestvaco Corporation Method for treating a substrate
WO2010018302A1 (fr) 2008-08-11 2010-02-18 Upm-Kymmene Corporation Procédé de fabrication de papier d'impression
US11051937B2 (en) 2015-07-14 2021-07-06 Edwards Lifesciences Corporation Prosthetic heart valve

Also Published As

Publication number Publication date
US20040200593A1 (en) 2004-10-14
FI20011429A0 (fi) 2001-07-02
GB2397309A (en) 2004-07-21
DE10296949T5 (de) 2004-07-22
GB0329167D0 (en) 2004-01-21

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