WO1992022016A1 - Papier pour copie sous forme de feuilles - Google Patents

Papier pour copie sous forme de feuilles Download PDF

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Publication number
WO1992022016A1
WO1992022016A1 PCT/SE1992/000385 SE9200385W WO9222016A1 WO 1992022016 A1 WO1992022016 A1 WO 1992022016A1 SE 9200385 W SE9200385 W SE 9200385W WO 9222016 A1 WO9222016 A1 WO 9222016A1
Authority
WO
WIPO (PCT)
Prior art keywords
paper
parts
copying
calcium carbonate
copying paper
Prior art date
Application number
PCT/SE1992/000385
Other languages
English (en)
Inventor
Nils Åke KARLIN
Original Assignee
Mo Och Domsjö Aktiebolag
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 Mo Och Domsjö Aktiebolag filed Critical Mo Och Domsjö Aktiebolag
Priority to DE69217942T priority Critical patent/DE69217942T2/de
Priority to EP92911826A priority patent/EP0587692B1/fr
Publication of WO1992022016A1 publication Critical patent/WO1992022016A1/fr
Priority to FI935441A priority patent/FI103366B/fi
Priority to NO934400A priority patent/NO307487B1/no

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
    • D21H21/50—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 form
    • D21H21/52—Additives of definite length or shape
    • 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
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/385—Oxides, hydroxides or carbonates
    • 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
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
    • 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
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
    • G03G7/0006—Cover layers for image-receiving members; Strippable coversheets
    • G03G7/0013—Inorganic components thereof
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
    • G03G7/006—Substrates for image-receiving members; Image-receiving members comprising only one layer

Definitions

  • the present invention relates to copying paper in sheet
  • the copying paper is comprised of base paper and coating layer applied to at least one side of the base paper, preferably to both sides thereof.
  • the coating layer has a surface
  • range of surface weight of from 80 to 200 g/m refers to the surface weight of the base paper plus the surface weight of the coating layer, alternatively, of the coating layers.
  • the present invention provides a solution to the afore ⁇ said problems and relates to a copying paper which com ⁇ prises a base paper based on a fibre starting material of which at least 60% is comprised of short fibre pulp refined to 17-22°SR and of at least 20% long fibre pulp refined to 25-38° SR, together with filler in an amount of 19-28%, calculated on the base paper, and on at least one side of the base paper a coating layer of a surface weight of 12-18 2 g/m , characterized in that the base component(s) of the coating layer (include) either a) 100 parts of calcium carbonate distributed according to 60-80 parts of calcium carbonate of which 90% have a particle size beneath 2 um and 40-20 parts of calcium carbonate of which 95% have a particle size beneath 2 um; or b) 60-90 parts of calcium carbonate of which 90% have a particle size beneath 2 um and 40-10 parts of kaolin clay of SPC (selected particle size) quality; and in that the surface coating also includes at least binder and harden
  • the binder preferably consists of starch and/or latex. It is especially preferred that the starch is oxidized and that the latex is of the open styrene butadiene type.
  • the starch is preferably added in an amount of 5-7% calculated on dry pigment or base component(s) .
  • Latex is preferably added in an amount of 6-8%, calculated on dry pigment or base component(s) . This applies to the addition of both of these chemicals to the coating color and later the paper. If only one of these chemicals is used, the aforesaid quan ⁇ tity must be increased. It is preferred that the hardener is free from formalin. For instance, glyoxal can be used in an amount of 0.5-1.5% calculated on dry pigment or base component(s) .
  • the coating layer, and therewith the paper contains 1-3 parts of stearate, preferably calcium stearate or ammonium stearate, calculated on 100 parts of base component(s) .
  • the dry solids content of the coating color, and there- with also of the newly applied coating layer shall lie within the range 65-70%.
  • the copying paper shows a coating layer on its both sides.
  • the filler present in the copying paper may be any known filler whatsoever, although calcium carbonate is preferred.
  • Coating colors of the aforedescribed kind primarily result in a mat paper, i.e. a paper whose gloss is beneath 20% measured in accordance with Lehman (70-degree incident light).
  • composition of the coating color will differ slightly from the composition which provides an optimal mat copying paper and possibly prefers an extra chemical addition.
  • the copying paper according to the invention has good printability as well as good runability in copying machines.
  • By choosing the correct base paper and a coating layer of correct composition it has been found possible to achieve the same reliability in the copying machine with regard to preprinted copying paper as that achieved with conventional copying paper.
  • the frequency at which stoppages occur in the machine when using the copying paper according to the invention is extremely low.
  • the paper according to the invention can be run efficiently and effectively through copying machines as unprinted paper.
  • the chemicals from which the coating layer is comprised are relatively inexpensive in combination, therewith enabling the price of the copying paper to be kept at a relatively low level.
  • the fibre com ⁇ position of the base paper shall comprise at least 60% of short fibre pulp and at least 20% of long fibre pulp.
  • short fibre pulp is meant chemical pulp, preferably sulphate pulp, manufactured for instance from hardwood, such as birch, eucalyptus, beech, aspen, and similar types of wood.
  • long fibre pulp is meant chemical pulp, pre ⁇ ferably sulphate pulp, manufactured for instance from soft ⁇ wood, such as pine, spruce, and other types of wood.
  • Another usable chemical pulp is sulphite pulp.
  • the remaining 20% of the fibre composition may consist of one of the two aforesaid types of pulp or of a mixture thereof. It is also fully possible to mix in other types of pulps, such as sulphite pulp and/or high yield pulp, such as mechanical pulp for instance.
  • the fibre composition of the base paper, refinement of the different pulps and the filler content of the paper shall be adapted so that the finished paper has low curling tendencies (reactivity) .
  • curling is meant that the paper deviates from the flat shape and adopts varying curved shapes.
  • the pulps shall be refined only to a moderate extent, i.e. the paper shall be imparted other refinement dependent properties to the best possible extent, while at the same time fulfilling the aforesaid conditions.
  • the various pulps are refined separately to the refinement levels earlier mentioned in °SR, i.e. degrees Schopper-Riegler.
  • the filler shall be present in an amount of 19-28%, preferably 20-25%, calculated on the base paper.
  • the filler is preferably calcium carbonate in different forms, such as chalk, ground marble and calcium carbonate precipitates. It is also possible, however, to use other fillers, either totally or partially, such as kaolin clay, talcum and gypsum (CaSO.).
  • the manner in which the base paper is constructed and produced is highly significant to the ability to run the finished paper in copying machines.
  • the composition of the coating layer is highly significant to the runability of the paper in copying machines, and sometimes a decisive significance.
  • the quantity of coating substance applied is also significant to some extent.
  • the coating layer or layers of the inventive copying paper is/are produced from one of two coating colors.
  • the pigment or base component of one color consists of 100 parts calcium carbonate.
  • Calcium carbonate having different particle size distributions is available and the calcium carbonate is said to have different degrees of fineness, such as fine, superfine, etc.
  • 60-80 parts of such calcium carbonate is used, of which 90% of the particles have a size beneath 2 um and 40-20 parts of a still finer calcium carbonate, namely a calcium carbonate of which 95% of the particles have a size beneath 2 um.
  • the color may also include an opti- cal whitener, different types of tinting colours, and a substance for adjusting the pH of the color. Examples of such substances include sodium hydroxide and ammonium.
  • binder and hardener are present have been given in the aforegoing.
  • the remaining chemicals are present in a very small quantity, i.e. in an amount of 1 part or less. Additional chemicals may also be added to the color.
  • the pigment or base component of the other color com ⁇ prises 60-90 parts calcium carbonate, where 90% of the particles have a size smaller than 2 um, and 40-10 parts of kaolin clay of SPS quality.
  • SPS is an acronym of the English language designation "selected particle size”.
  • This color also includes binder and hardener in the aforesaid quantities.
  • the color may also include an optical whitener, tinting color and an alkali for adjusting the pH of the color, etc.
  • the color will also preferably include a com- paratively large quantity of stearate. Mentioned additive has been found to provide the copying paper with good runability in copying machines. The stearate probably assists in imparting the correct surface property to the paper and above all the correct friction. Stearate may also be added to the first color.
  • starch as a binder in top coatings is normally avoided, since starch causes pronounc ⁇ ed binder migration, which results in mottling.
  • starch causes pronounc ⁇ ed binder migration, which results in mottling.
  • One advan- tage afforded by the addition of starch is that the paper obtains good stiffness and good toner adhesion, and starch
  • both sides of the copying paper are provided with a coating layer.
  • the paper is coated in a two station coating machine.
  • the coating color shall have a relatively high dry solids content, namely within the interval 65-70%.
  • the paper is dried first on the one coated side and then on the other side.
  • the first coated side of the paper is dried in a manner such that the paper will include 6-9% water and drying of the other side of the paper is continu ⁇ ed until the paper has a water content of 4-5%.
  • a base paper was produced on a 6.5 m wide Valmet type paper machine in the following manner:
  • Birch sulphate pulp 70%
  • pine sulphate pulp 24%
  • spruce sulphite pulp 6%.
  • Filler mainly calcium carbonate, was supplied in an amount of 21.2% in finished paper. 131 kg of filler were supplied for each tonne of paper in dispersion while the remaining filler was supplied via incoming paper broke.
  • the stock also contained the following chemicals:
  • the paper was surface sized with an 8%-surface sizing
  • the aforedescribed base paper had a surface weight of 2 97 g/m and the coating colors A, B and C were applied to the paper.
  • the coating color A was applied to the base paper both in a pilot coating machine and in a full scale test, whereas the coating colors B and C were applied to the base paper solely in the pilot coating machine.
  • the three coating colors had the following compositions.
  • the color had a dry solids content of 65%.
  • the color had a dry solids content of 68%.
  • Added to the clay were: 6 parts styrene butadiene latex retailed under the trade name Dow 905; and 6 parts oxidized starch retailed under the trade name Cere ⁇ star 05595, boiled to a dry solids content of about 32%. Added in the following order were: 0.8 parts hardener (glyoxal);
  • the color had a dry solids content of 59%.
  • the coatings were applied under realistic conditions, partly on a pilot coating machine (the colors A, B and C) having curved blades, at a speed of 800 m/minute and partly on a full-scale Jagenberg coating machine (color A) having a width of 3.3 m and curved blads at a speed of 800 m/- minute.
  • the base paper was coated on both sides in all instances, with an amount of color corresponding to 16 2 g/m .
  • the finished, coated paper had a surface weight of
  • the friction between the feed belt and the paper shall be greater than the friction between the retard belt and the paper, which in turn shall be greater than the friction between paper and paper.
  • the friction between the different materials was measured according to ASTM (Americal Society for Testing and Materials) D1894.
  • friction was measured by measuring the friction generated between the feed belt and the felt side of the paper (FS) and, in the other case, between the feed belt and the wire side (WS) of the paper. Similar measure ⁇ ment was made with regard to the retard belt and the paper. Both static and kinetic friction were measured on the papers. The results are set forth in the following Table 1.
  • the first three papers in the above Tables are in accordance with the invention, whereas the fourth paper was not, i.e. the coating color C was applied to this fourth paper.
  • the difference between the static and kinetic fric ⁇ tion of the inventive papers is 23 or more, whereas the corresponding difference of the non Inventive paper (0-sample) is as small as 1.
  • a standard has been set whereby 5 000 copies (simplex) and 3 000 copies (duplex) can be copied in sequence without causing a machine stoppage.
  • simplex Is meant that copies are made on only one side of the paper, while duplex means that copies are made on both sides of the paper.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Laminated Bodies (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Electrotherapy Devices (AREA)

Abstract

La présente invention concerne un papier pour copie qui en même temps possède une bonne imprimabilité et peut être utilisé de manière satisfaisante dans les machines à copier à feuilles. L'invention concerne un papier pour copie qui comprend un papier de base formé à partir d'un matèriau de départ fibreux dont au moins 60% sont constitués d'une pâte à fibres courtes raffinée à 17-22 °SR et au moins 20% sont constitués d'une pâte à fibre longues raffinée à 25-38 °SR et une charge correspondant à 19-28%, lesdits pourcentages étant calculés par rapport au papier de base. Au moins un côté du papier de base est couché jusqu'à obtention d'un grammage de 12-18 g/m2. Le papier pour copie est caractérisé par le fait que le ou les composant(s) de base de la couche comprennent soit a) 100 parties de carbonate de calcium réparties en 60-80 parties de carbonate de calcium dont 90% ont une dimension de particule inférieure à 2 ν, et en 40-20 parties de carbonate de calcium dont 95% ont une dimension de particule inférieure à 2 ν; soit b) 60-90 parties de carbonate de calcium dont 90% ont une dimension de particule inférieure à 2 ν, et 40-10 parties de kaolin de qualité TPS (Taille de Particule Sélectionnée); et par le fait que la couche comprend aussi au moins un liant et un durcisseur.
PCT/SE1992/000385 1991-06-05 1992-06-05 Papier pour copie sous forme de feuilles WO1992022016A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE69217942T DE69217942T2 (de) 1991-06-05 1992-06-05 Kopierpapier in blattform
EP92911826A EP0587692B1 (fr) 1991-06-05 1992-06-05 Papier pour copie sous forme de feuilles
FI935441A FI103366B (fi) 1991-06-05 1993-12-03 Kopiopaperi arkkimuodossa
NO934400A NO307487B1 (no) 1991-06-05 1993-12-03 Kopieringspapir i arkform

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9101699-8 1991-06-05
SE9101699A SE468531C (sv) 1991-06-05 1991-06-05 Kopieringspapper i arkform

Publications (1)

Publication Number Publication Date
WO1992022016A1 true WO1992022016A1 (fr) 1992-12-10

Family

ID=20382930

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1992/000385 WO1992022016A1 (fr) 1991-06-05 1992-06-05 Papier pour copie sous forme de feuilles

Country Status (9)

Country Link
EP (1) EP0587692B1 (fr)
AT (1) ATE149702T1 (fr)
DE (1) DE69217942T2 (fr)
DK (1) DK0587692T3 (fr)
ES (1) ES2098513T3 (fr)
FI (1) FI103366B (fr)
NO (1) NO307487B1 (fr)
SE (1) SE468531C (fr)
WO (1) WO1992022016A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4324028C1 (de) * 1993-07-17 1994-12-01 Feldmuehle Ag Stora Beidseitig gestrichenes Rollendruckpapier und Verfahren zu seiner Herstellung
EP0718700A2 (fr) * 1994-12-20 1996-06-26 Fuji Xerox Co., Ltd. Papier de transfert électrophotographique
WO2000004231A1 (fr) * 1998-07-17 2000-01-27 Ecc International Ltd Materiaux de pigmentation et leur mise en application dans des compositions de revetement
AU726536B2 (en) * 1996-01-16 2000-11-09 Haindl Papier Gmbh & Co. Kg Roll printing paper suitable for cold set and process for its production
WO2008023092A1 (fr) * 2006-08-24 2008-02-28 Stora Enso Oyj Procédé de contrôle de la surface de contact d'un substrat de papier ou de carton
EP2949477B1 (fr) 2014-05-26 2016-11-30 Omya International AG Carbonate de calcium pour support d'impression de rotogravure
US10647143B2 (en) 2014-05-26 2020-05-12 Omya International Ag Calcium carbonate for rotogravure printing medium

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7758690B2 (en) 2002-05-03 2010-07-20 Imerys Minerals, Ltd. Paper coating pigments
BR102017028522A2 (pt) * 2017-12-28 2019-07-16 Klabin S/A Papel kraftliner de fibra química curta

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE350083B (fr) * 1967-02-08 1972-10-16 English Clays Lovering Pochin
DE2453910A1 (de) * 1973-11-15 1975-05-28 Rhone Progil Waessrige streichmassen fuer papier und karton
NO154017B (no) * 1978-02-27 1986-03-24 Pluss Stauffer Ag Mineralsk fyllstoff i form av naturlig kalsiumkarbonat.
SE446201B (sv) * 1978-10-30 1986-08-18 Omya Sa Bestrykningsmassa for papper med hog torrsubstanshalt innehallande kalciumkarbonat och styrenakrylatlatex
NO161073B (no) * 1979-10-29 1989-03-20 Pluss Stauffer Ag Mineralsk fyllstoff.
DE3214808C2 (fr) * 1981-04-24 1989-08-17 Kanzaki Paper Mfg. Co., Ltd., Tokio/Tokyo, Jp

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE350083B (fr) * 1967-02-08 1972-10-16 English Clays Lovering Pochin
DE2453910A1 (de) * 1973-11-15 1975-05-28 Rhone Progil Waessrige streichmassen fuer papier und karton
NO154017B (no) * 1978-02-27 1986-03-24 Pluss Stauffer Ag Mineralsk fyllstoff i form av naturlig kalsiumkarbonat.
SE446201B (sv) * 1978-10-30 1986-08-18 Omya Sa Bestrykningsmassa for papper med hog torrsubstanshalt innehallande kalciumkarbonat och styrenakrylatlatex
NO161073B (no) * 1979-10-29 1989-03-20 Pluss Stauffer Ag Mineralsk fyllstoff.
DE3214808C2 (fr) * 1981-04-24 1989-08-17 Kanzaki Paper Mfg. Co., Ltd., Tokio/Tokyo, Jp

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4324028C1 (de) * 1993-07-17 1994-12-01 Feldmuehle Ag Stora Beidseitig gestrichenes Rollendruckpapier und Verfahren zu seiner Herstellung
EP0718700A2 (fr) * 1994-12-20 1996-06-26 Fuji Xerox Co., Ltd. Papier de transfert électrophotographique
EP0718700A3 (fr) * 1994-12-20 1997-05-28 Fuji Xerox Co Ltd Papier de transfert électrophotographique
AU726536B2 (en) * 1996-01-16 2000-11-09 Haindl Papier Gmbh & Co. Kg Roll printing paper suitable for cold set and process for its production
WO2000004231A1 (fr) * 1998-07-17 2000-01-27 Ecc International Ltd Materiaux de pigmentation et leur mise en application dans des compositions de revetement
WO2008023092A1 (fr) * 2006-08-24 2008-02-28 Stora Enso Oyj Procédé de contrôle de la surface de contact d'un substrat de papier ou de carton
US8455057B2 (en) 2006-08-24 2013-06-04 Stora Enso Oyj Method for controlling surface contact area of a paper or board substrate
EP2949477B1 (fr) 2014-05-26 2016-11-30 Omya International AG Carbonate de calcium pour support d'impression de rotogravure
US10647143B2 (en) 2014-05-26 2020-05-12 Omya International Ag Calcium carbonate for rotogravure printing medium

Also Published As

Publication number Publication date
FI935441A0 (fi) 1993-12-03
SE468531C (sv) 1995-06-12
SE9101699L (sv) 1992-12-06
NO307487B1 (no) 2000-04-10
FI103366B1 (fi) 1999-06-15
DK0587692T3 (da) 1997-07-21
EP0587692B1 (fr) 1997-03-05
ATE149702T1 (de) 1997-03-15
SE468531B (sv) 1993-02-01
NO934400L (no) 1993-12-03
NO934400D0 (no) 1993-12-03
DE69217942T2 (de) 1997-10-16
DE69217942D1 (de) 1997-04-10
EP0587692A1 (fr) 1994-03-23
ES2098513T3 (es) 1997-05-01
FI103366B (fi) 1999-06-15
FI935441A (fi) 1993-12-03
SE9101699D0 (sv) 1991-06-05

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