CN101680188A - a printing substrate - Google Patents

a printing substrate Download PDF

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Publication number
CN101680188A
CN101680188A CN200880006955A CN200880006955A CN101680188A CN 101680188 A CN101680188 A CN 101680188A CN 200880006955 A CN200880006955 A CN 200880006955A CN 200880006955 A CN200880006955 A CN 200880006955A CN 101680188 A CN101680188 A CN 101680188A
Authority
CN
China
Prior art keywords
printing
printing substrate
substrate
ink
paper
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.)
Pending
Application number
CN200880006955A
Other languages
Chinese (zh)
Inventor
奥利·哈基拉
保罗-海因茨·迪林
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.)
Stora Enso Oyj
Original Assignee
Stora Enso Oyj
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
Priority claimed from FI20070100A external-priority patent/FI122186B/en
Application filed by Stora Enso Oyj filed Critical Stora Enso Oyj
Publication of CN101680188A publication Critical patent/CN101680188A/en
Pending 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
    • D21H19/38—Coatings with pigments characterised by the pigments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
    • B41M5/508—Supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • 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
    • D21H19/62—Macromolecular organic compounds or oligomers thereof obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5218—Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5263—Macromolecular coatings characterised by the use of polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • 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

Abstract

The invention relates to a printing substrate for gravure and offset printing, which substrate exhibits a Cobb(wl5) water absorption value below 15 g/m<2>, preferably below 12 g/m<2>, a Cobb(o,C10) oil absorption value below 1.2 g/m2, preferably below 1 g/m<2>, and an Ink setting below 0.5, preferably below 0.3. The low water and oil absorption in combination with the quite fast ink setting of thesubstrate according to the invention gives rise to a printed substrate with improved printing qualities.

Description

Printing substrate
Technical field
The present invention relates to contain the printing substrate (printing substrate) of xylon.The invention still further relates to the printing process that comprises described printing substrate.
Background of invention
Hectographic printing is one of current the most frequently used printing process, and the blanket cylinder in the middle of this printing process is used is transferred to image on the printing substrate (being generally paper) from image-carrier (forme).The hectographic printing unit comprises plate cylinder, printing ink and dampening roller, blanket cylinder and impression cylinder.Forme comprises hydrophily suction part and hydrophobicity blotting part.The suction of forme partly forms the no image area territory, and blotting partly forms image-region.Dampening roller is the no image area territory that so-called fountain solution imposes on forme with chemical modification water, subsequently printing ink is imposed on the image-region of forme.Change blanket cylinder by the wheel that is coated with smooth hectographic printing blanket, printing ink and fountain solution are needed on printing substrate from forme.
In thermosetting roll web hectographic printing method (heatset web offset printing method), printing substrate accepts to print continuously also the dry printing ink that is printed on the surface with oven dry in hot-air drying device subsequently in one or more printing units.At last, printing ink is hardened on chill roll.Printing is accepted on the two sides of Move Volumes coil paper simultaneously in the nip that is formed by the blanket cylinder that prints unit up and down.In the four-color process of routine, need 8 printing units, the both sides of roll web respectively have 4.Before carrying out drying, will be transferred on the printing substrate from all printing ink that prints unit.This means, from ink printing of first printing unit on the paper surface of drying, and from printing ink transfer printing of last printing unit by formerly printing unit on the printing substrate wetting with fountain solution.
Printing-ink mainly by coloring pigment, pigment is fixed in the adhesive on printing substrate surface and the solvent composition of proper flow is provided.In drying device, most of printing ink solvents are evaporation rapidly in hot blast.The lip-deep ink film of printing substrate obtains its final hardness at cooling stage on chill roll.Subsequently, print roll web and enter folding apparatus usually, in this device, print roll web and accept folding and be cut into to print signature (printed signature).
Need fountain solution that image-region on the hectographic printing version and no image area territory are separated.Yet after printing ink was transferred on the printing substrate, fountain solution may cause some problems.The fountain solution that is needed on the coating printing substrate may make the intensity of coating reduce.In the polychrome thermosetting roll web hectographic printing of coating printing substrate, printing substrate is wetting in first printing unit.In follow-up printing unit, printing ink is transferred on the wetting printing substrate surface.When viscosity printing ink is needed on the coating of intensity reduction, the plucking that the coated particle that may occur becoming flexible causes.These particles have in the accumulation mode builds up trend in printing blanket, and then causes and need clean blanket.
Previous identification printing substrate for example printing needs porosity high and hydrophilic, so that absorb the fountain solution that is needed on printing substrate.Yet fountain solution infiltrates porous fibrous material and may cause xylon to expand.Filament expansion causes antiquarian to increase, and makes the image that prints in first pair of printing unit to mate fully with the image that prints in the 4th pair of printing unit.This problem of edge at the wide volume coil paper is particularly outstanding.This so-called alignment or left-falling stroke paper problem show as prints lip-deep ghost image coloured image.The mackle ghost image (dot doubling) that causes bad tone in printing image also may be owing to the printing substrate change in size between the printing unit.
In addition, the porous water-absorbing printing substrate needs at high temperature dry.The temperature of roll web can surpass 100 ℃ go through 0.2s in drying device after, and roll web outlet temperature (web exit temperature) can reach 150 ℃.Under so high temperature drying cause fiber coarse, rill (fluting) occurs, bubble.Paper this problem when printing that comprises mechanical fiber (mechanical fiber) is particularly outstanding.A reason that fiber rising (fiber rising) occurs is, opens in conjunction with (fiber bond) along with vapour pressure makes fiber, and moisture is rapid evaporation from the substrate (base sheet) of porous coating printing substrate.The permanent formation that rill is meant wave pattern when printing appears.Although also do not understand the mechanism that rill occurs fully, be the result that high temperature drying causes the moisture inequality all to be overflowed from printing substrate really.The foaming that high temperature drying causes sometimes may be seriously to causing the substrate layering.Bubble and also may cause roll web fracture when printing.Current thermosetting roll web hectographic printing method is very power consumption also.Air themperature in the drying device can reach 250 ℃ usually.
Thereby expectation provides the printing substrate that overcomes these problems.
In the prior art, attempted by providing printing substrate to overcome these problems with atresia lipophilic surface.WO2004030917 relates to the coating printing substrate with lipophilic surface, when this printing substrate has greater than the Gurley-Hill osmotic value of 5000s/100ml and time-delay 30s greater than the IGT ink set-off value (ink set-off value) of 0.6 printing density unit (printing density unit).The lipophilic surface means the exclusion fountain solution, thereby the contact angle of obviously surperficial and water is greater than 90 °.
Yet the steam that comes from the moisture in the base paper is not easy to for example be evaporated the described printing substrate of WO2004030917 from the atresia printing substrate of densification.This causes that the vapour pressure in the printing substrate raises, and then causes the serious printing quality problem of like fibrous rising and foaming.As described in WO2004003293, even the roll web outlet temperature when leaving drying device is lower than 115 ℃, still these problems may appear, because the highest roll web temperature is not somewhere in the roll web outlet but in drying device usually.
In addition, some lipophilic surfaces for example the surface described in the WO2004030917 is often still very hydrophobic.If pore-free surface is too hydrophobic, then fountain solution is obstructed via the continuous-flow that blanket arrives paper from forme.Damping water concentrates on and prints among the unit, this can be considered as the printing defects in some image-region.On the other hand, if the surface is too hydrophilic, then the power between printing substrate and the water is higher than the power between printing substrate and the oil.Thereby the lip-deep water of printing substrate repels printing ink, can cause lower intensity of colour and inhomogeneous printing thus.
The printing substrate that discloses among the WO2004003293 is coated with flake pigment (plate like pigment), for example kaolin and talcum.It is the relative higher pigment of price that kaolin is for example compared with calcium carbonate with talcum.In addition, for example compare with calcium carbonate, flake pigment such as kaolin and talcum cause printing to have lower brightness.
Summary of the invention
An object of the present invention is to provide the printing substrate that does not have those problems of prior art.
Another object of the present invention provides the thermosetting roll web hectographic printing printing substrate that has good dimensional stability and allow the low energy drying.
The thermosetting roll web hectographic printing printing substrate that a further object of the present invention provides the rill of generation and fiber is less coarse and crack resistance is improved.
A further object of the present invention provides the printing quality with improvement and the printing substrate of paper feed.
Above-mentioned purpose and other advantage realize by the described printing substrate of claim 1 is provided.This printing substrate for example can be fibrous printing substrate, and the printing substrate of preferred cellulose fiber is paper or cardboard for example.
Printing substrate of the present invention shows and is lower than 15g/m 2, preferably be lower than 12g/m 2Cobb (w15) hygroscopicity value, be lower than 1.2g/m 2, preferably be lower than 1g/m 2Cobb (o, C10) oil factor are lower than 0.5, preferably are lower than 0.3 printing ink and solidify (Ink setting).Cobb (w15) hygroscopicity value is preferably 1-15g/m 2, 2-15g/m more preferably 2, (o C10) is preferably 0.2-1.2g/m to Cobb 2, 0.3-1g/m more preferably 2
The printing quality of giving the improvement of printing printing substrate is solidified in water imbibition that printing substrate of the present invention is low and oil absorption combination printing ink very fast.Although printing substrate of the present invention shows low water imbibition, it allows steam to see through from structure, thereby has avoided being similar to the problem of foaming.In addition, the fountain solution of having avoided being transferred on the printing substrate owing to low water imbibition infiltrates the printing substrate structure.Thus, the bad variation of printing substrate size that causes because of filament expansion do not occur, and can avoid register trouble and mackle ghost image.Good DIMENSIONAL STABILITY also allows to use the wide volume coil paper to realize clear picture (alignment is good) and the good printing of tone rendering, and certain effect has been played in this development to wide cut thermosetting roll web offset press.Low water imbibition is also given the productive rate of improvement, and blanket needing of cleaning reduced, because paper surface keeps good profit wet strength.In addition, because fountain solution does not have the infiltrated fiber internal structure and cause fiber to change in conjunction with (fiber bonding), thereby the problem of other wet roll paper, for example problem of roll web pulling force and web breakage have been avoided.Thereby the paper feed of hectographic printing improves.The consumption of fountain solution reduces because of water imbibition is low, and this is favourable economically.
In a kind of preferred embodiment, printing substrate also shows contact angle with water less than 90 °.Thus, transfer on the hydrophily printing substrate, thereby can realize the continuous-flow of fountain solution from the printing unit to paper from the water of printing blanket.Most preferably, with the contact angle of water less than 90 ° and greater than 60 °.Prevent that thus printing substrate is too hydrophilic.Thereby intensity of colour is low and print uneven problem and avoided.
In another embodiment of the present invention, printing substrate is fibre-bearing printing substrate for example paper or the cardboard that is coated with coating composition, and described coating composition comprises color compositions.
Preferably, color compositions comprises calcium carbonate.Using calcium carbonate is favourable as pigment economically, because calcium carbonate is relatively inexpensive coating pigment.In addition, calcium carbonate has the potential that improves paper brightness.Most preferably, the content of calcium carbonate is greater than 10%, most preferably greater than 20% in the color compositions.This has further improved the optical property of printing substrate.
In a kind of preferred embodiment; color compositions comprise particulate talcum with micron-scale spherical diameter, nano-scale calcium carbonate granule, comprise the adhesive of copolymer, described copolymer comprises as at least one dicarboxylic acids of monomer and is selected from least one monomers of diamines, triamine, dioxane hydramine and three alkanolamines.Because calcium carbonate granule was avoided with separating of talc particle, thereby this specific color compositions makes the water imbibition and the porosity of control paper become possibility.In addition, the nano-sized pigments in the coated structure of little water that printing substrate of the present invention absorbed and solvent is caught and is avoided moving in the substrate of printing substrate.
Color compositions comprises that ratio is preferably about 3: 1 to about 1: 3, most preferably is 2: 1 talcum and calcium carbonate.The talcum component is improved the repellency on surface and is made printing ink solidify the maintenance proper level.
Printing substrate of the present invention has good dry strength and wet strength, and this combines with the low water absorbable of printing substrate and has further suppressed coating material is piled China ink on the hectographic printing blanket trend.Thereby allow printing substrate to solidify with printing ink fast and easily the dry type low viscosity ink use, this makes dryly at low temperatures prints printing substrate and becomes possibility.Thereby reduced the relevant problem of high temperature drying, for example fiber rising and rippleization.The special surface characteristic of printing substrate of the present invention allows to use easy dry type printing ink, for example is similar to a kind of printing ink that EP 1602696A1 discloses.This makes that dry printed matter becomes possibility under chosen temperature, so that the maximum web temperature that reaches when dry keeps below 130 ℃, preferably is lower than 100 ℃.Printing printing substrate of the present invention carries out the dry printing printing substrate that makes and has higher moisture under this low temperature.The printing printing substrate that moisture is high has better cracking resistance and electrostatic problem do not occur when handling the printing signature when carrying out folding in the bookbinding stage.The wire stabbing stage at magazine bookbinding production line particularly needs crack resistance, because the iron wire nail passes the folding of the printing signature that derives from different printings (print run) and closed overleaf subsequently.In addition, even also residual in substrate moisture arranged, this makes rill of printing signature reduce.Owing to print the moisture height of printing substrate, thereby also avoided the problem of internal paper from the front cover expansion.Owing to making the high vapour pressure in the printing substrate, low temperature drying further reduces.Improved printing quality thus, because the substrate that the fiber rising reduces and can use z intensity to reduce in view of the risk that does not have foaming.
The invention still further relates to the printing printing substrate, this printing printing substrate comprises described printing substrate and the thermosetting cement painting plate ink that is printed on this printing substrate, the present invention relates to thermosetting roll web hectographic printing printing process, this method is included at least one thermosetting roll web hectographic printing unit prints described printing substrate and the step of dry described printing substrate at least one drying device.Preferably, drying is carried out under chosen temperature, so that the maximum web temperature that reaches when drying is lower than 130 ℃, preferably is lower than 100 ℃.
Printing substrate of the present invention is suitable for the printing of thermosetting hectograph most, but for example also can advantageously accept printing in sheet-fed offset printing and gravure process.Although the above-mentioned discussion about the printing substrate advantage relates generally to the hectographic printing of thermosetting roll web, but should be understood that, the low water absorbable of printing printing substrate in sheet-fed offset printing is given good DIMENSIONAL STABILITY and water proofing property equally, and this is particularly favourable to the goods that are similar to map or packaging material for food.This printing substrate is used for intaglio printing allows to use water-based inks, because low water imbibition produces the required good dimensional stability of wide volume coil paper.
The specific embodiment
Having disclosed the printing quality improved can be low but allow the printing substrate of vapour transmission to realize by using water imbibition.According to the present invention, this printing substrate obtains by body paper and coating composition are provided, described coating composition through design provide low Cobb hygroscopicity value and Cobb oil factor and fast printing ink solidify.
In one embodiment of the present invention, this printing substrate obtains by the coating composition that comprises color compositions is provided to body paper, and this color compositions comprises inorganic or organic micron particles, inorganic nanoparticles and adhesive.Preferably, the adhesive in the color compositions is a copolymer, and this copolymer comprises at least one dicarboxylic acids and at least one monomer that is selected from diamines, triamine, dioxane hydramine and three alkanolamines as monomer.Thus, micron particles is covered by nano particle, and the separation between nano particle and the micron particles is avoided, thereby water imbibition and pore structure can be controlled.
In this article, micron particles is meant that particle has the spherical diameter of micron-scale, for example 0.3-100 μ m, more preferably 1-25 μ m.Micron particles is preferably granular talcum, most preferably is foliated talc, because talcum improves the repellency on surface and make printing ink solidify the level that keeps suitable.
Nano particle is meant that particle has the spherical diameter of nanometer size, for example less than 200nm.Preferably, nano particle is a granular calcium carbonate.Calcium carbonate is for low price pigment and give the good optical characteristic.Calcium carbonate can be winnofil (PCC) or powdered whiting (GCC).
In one embodiment of the present invention, nano-calcium carbonate be water-repelling agent for example ethylene-acrylic acid copolymer (EAA) in the presence of powdered whiting (GCC) through grinding.Water-repelling agent reduces the water imbibition of nano-calcium carbonate, thereby further reduces the water imbibition of printing substrate.
Other pigment is calcined clay, TiO for example 2With plastic pigment replaceability ground or be used for color compositions extraly.
Prevent that the pigment adhesive that nano particle separates with micron particles from for example can be adipic acid and N-2-aminoethyl-1, the copolymer of 2-ethylenediamine and chloropropylene oxide.Calculate according to micron particles, the content of adhesive is preferably about 2% of total amount in the color compositions.
Coating composition also can comprise one or more adhesives that color compositions are bonded in the printing substrate surface.Adhesive can be natural or synthetic, and can include but not limited to starch, protein and emulsion.
Also can add other additive such as lubricant in the composition.
Body paper can be the body paper of any kind.Coating composition can be wide coating weight scope (for example every 5-40gsm, preferred every 10-20gsm) be applied over the one or both sides of body paper.Can adopt the coating technique of any kind for example to be coated with, coating is applied over body paper by sizing applicator, roller coat, spraying, blade coating or curtain.Body paper can be multi-layer coated, for example double-deck coating, and one of them coating is a coating composition as herein described, another coating is conventional coating composition.For example, printing paper of the present invention promptly is coated with and is used to provide the body paper of the coating composition that low Cobb value and quick printing ink solidifies also can be coated with extra conventional coating composition.Alternatively, body paper can at first be coated with conventional coating composition, is used to provide the coating composition that low Cobb value and quick printing ink solidify to form the top layer that is positioned on this first conventional coating on it.Thus, can further improve the optical property of printing substrate.Coated paper can be in press polish in the supercalender for example.
With reference to following examples the present invention is described in more detail.Should be understood that, the invention is not restricted to concrete processing step and material that this paper discloses.
Measure and evaluation method
According to SCAN 37:77, and CU 10 measurement Cobb Unger (o, CU10).This method is measured the oil absorption of paper or cardboard.According to this method, measure the castor oil quality that the one side unit are of the time paper go through 10s under given conditions or cardboard is absorbed.
Utilize ISO 535:1991 (E) to measure Cobb Unger (w15).According to this method, measure the time 1m that goes through 15s under given conditions 2Paper or cardboard in the water yield that particular moment absorbed.Air conditioning atmosphere (conditioning atmosphere) according to ISO 187 (23 °/50%RH).
According to Pr ü fung von Druckpapieren, Merkblatt V/32/99 measures printing ink and solidifies.Sticking China ink is the measuring of printing ink setting rate on the printing substrate.In the printing unit, under the line pressure that limits and with the regular time interval, make and print the instantaneous contact counting of printing substrate printing (counterprinting paper).Subsequently, use opacimeter to measure printing ink and be needed on painted that tally sheet produces.According to Zellcheming standard V/31793 with 1.5g/m on the paper surface 2The China ink amount measure.The printing ink set value is more little, and printing ink solidifies fast more.In following examples, employed printing ink is Wegschlagtestfarbe Michael Huber M ü nchen 52006806.09.06,0.100.Employed tally sheet is Scheufelen APCO II/II.Air conditioning according to ISO 187 (23 °/50%RH).Measurement direction is the print direction that is parallel to machine direction.The time interval is 15s; 30s; 60s; 120s; 300s.When 60s, provide the printing ink set value.Employed printing machine is Pr ü fbau Probeandruckgerat.In the printing of printing substrate, using Shore hardness is that 65 ° no seam vulcanized rubber is as forme.In the printing of tally sheet, use aluminium matter forme.The pressure of printing substrate/counting version is 200N/cm.
Use the automatic porosimeter Auto of micronic dust Pore III 9405 to measure porosity.Range of value is 0.01-0.001 μ m, measures according to the pressure intervals shown in the appendix I.According to mercury hole method, apply in various degree pressure by the sample in being dipped in mercury, characterize porosity.Along with pressure in the analytic process raises, calculate pore-size at each pressure spot, and measure and fill the required corresponding mercury volume of these holes.
Use SCAN P 18:66 to measure contact angle.According to this method, measure the shape of water droplet on the printing substrate surface.If printing substrate is scolded water, then drop is spherical.If the water infiltration printing substrate, then drop is more flat.Can determine repellency or hydrophily by measuring contact angle, a limit of contact angle is to be positioned at the lip-deep drop baseline of printing substrate, and another limit is the tangent of neighbouring surface.In embodiment shown below, after 0.1s, measure contact angle, air conditioning atmosphere according to ISO187 (23 °/50%RH).
Use K﹠amp according to SCAN-P 70:95; The special ink that N provides is measured K﹠amp; The N absorbency is to estimate the absorbency on printing substrate surface.At K﹠amp; When using 2 minutes and removed subsequently, N printing ink measures K﹠amp according to surface brightness decline percentage; The N absorbency.The numerical value of expression absorbency is more little, and the porosity of coating is more little, thereby the degree of printing ink infiltration coating is low more.
Use the graceful talysurf AS300 of thunder to measure rill.This instrument uses laser to carry out work, writes down and prints lip-deep corrugated contours.According to the steepness of each ripple square calculate rill index (fluting index), and get the mean value of several ripples in the different printing areas.The rill index is low more, and rill is few more.
According to ISO 12634, use Tack-O-Scop measurement device printing-ink viscosity.Test condition is as follows: quantity of ink 0.4ml, stabilization time 30s, stabilized speed 50m/min, test speed 150m/min, 30 ℃ of temperature.Obtain maximum ink viscosity and reach the used time of maximum ink viscosity from viscograph, the drying property of printing ink is described.It is short more to reach the used time of peak viscosity, and ink setting must be fast more.Viscosity number characterizes and peel off the required power of ink film when printing ink shifts between printing substrate and printing blanket.Lower viscosity number means that peeling force is lower and require lower to strength of paper.
Use Prufba ü Deltack device measuring Passes to fail.In the method, printing ink is transferred on the papery printing substrate, the China ink layer that will form on this papery printing substrate was peeled off once in per 3 seconds.The viscosity of printing-ink is solidified on paper along with printing ink in test process and is increased.Can carry out the how many times ink detachment before the fracture of operator's perusal paper surface.The ink detachment number of times is called Passes tofail.This numerical value is high more, and the surface strength of printing substrate is good more.This tests employed printing ink is HuberWegschlagtestfarbe printing ink 520068.Predetermined force of impression (unit A) is 800N, and force of impression (B of Unit) is 250N, and print speed printing speed is 0.5m/, and temperature is 18 ℃, and quantity of ink is 190 μ L.
Plucking is defined as from paper surface and shuts down each particle, promptly tears paper or paperboard surface in the typography process.
Use Prufba ü, the multi-functional printability tester that Munich makes is measured dried plucking, sets value as follows:
Ink device temperature: 23 ℃
Application pressure: 150N/cm
Flexographic galley: 4cm is wide
Short sample stock (Short sample print carrier)
Print speed printing speed: 0-3.0m/s quickens
According to this test, use Pr ü fbau Probeandruck equipment that paper is quickened printing.Ink detachment power raises along with the transfer speed of printing ink on paper and increases.When reaching a certain printing ink transfer speed, ink detachment power surpasses surface strength of paper, this can be considered as shut down each particle from paper.In this test, the speed when providing plucking and begin in the m/s of unit.Surface strength of paper is high more, and the speed when plucking begins is high more.
In following examples, use available from Michael Huber the following printing ink of Munich:
Nr.2 (408002) typical set value *(Inko 14.8)
Nr.3 (408003) high viscosity value *(Inko 19.5)
Use Pr ü fbau, the multi-functional printability tester with damping device that Munich provides is measured wet plucking, sets value as follows:
Ink device temperature: 23 ℃
Application pressure: 15kp/cm
Flexographic galley: 4cm is wide
Long sample stock
Print speed printing speed: 0.5-4.0m/s (constant)
With the 0.5m/s alternation
The time interval=1s between damping device and the printing unit
In wet plucking test, at first that paper is wetting.After 1s, use Pr ü fbauProbeandruck equipment, with constant speed wetting paper is printed.Under a certain printing ink transfer speed, ink detachment power surpasses the wet strength of paper surface, this can be considered as shutting down coating granule from printing substrate.In this test, provide speed when noticing wet plucking first in the m/s of unit.The paper surface wet strength is high more, and the speed when plucking takes place is high more.In following examples, use available from Michael Huber the following test ink of Munich:
Nr.2 (408002) normal viscosity value *(Inko 14.8)
Nr.3 (408003) high viscosity value *(Inko 19.5)
Embodiment 1
The body paper that uses in following examples does not have the coating body paper as NeoPress G, and 36gsm comprises 50% northern bleached softwood kraft (NBSK) paper pulp and 50% mechanical pulp.
Use comprises three body paper samples of coating composition coating of color compositions, and as shown in table 1, described color compositions comprises the talc particle and the powdered whiting particle of different proportion.
Table 1
??P1 ??P2 ??P3
Talcum: CaCO 3 ??25∶75 ??33∶66 ??50∶50
The talc particle that is used for color compositions has the spherical diameter of micron-scale, and the powdered whiting particle has the spherical diameter of nanometer size.Color compositions also comprises adipic acid and N-2-aminoethyl-1, and the copolymer of 2-ethylenediamine and chloropropylene oxide is as adhesive.
Prepared color compositions according to following examples 1a and 1b.Described embodiment shows the preparation of P1 and P3.Prepared color compositions P2 according to the mode identical, but calcium carbonate is different with the ratio of talcum with P3.In the preparation of P2, according to preparation identical ratio during P3, recomputate additional additive and reacted constituent.
Embodiment 1a, the preparation of P1
Granular talcum 1:
The granular talcum that uses among the embodiment 1a is Finntalc P 05 Pulver, MONDO Minerals, Finland.
Adhesive 1:
Adhesive is adipic acid and N-2-aminoethyl-1,15% the aqueous solution of the copolymer of 2-ethylenediamine and chloropropylene oxide, and feature is as follows:
The total content of chlorine: 1.5w%
The content of organochlorine:＜0.5w%
MW＞1000g/mol
The brookfield viscosity of the aqueous solution: 80mPas+/-30mPas
pH：3.0
Described adhesive for example can react in deionized water by diethylenetriamines, monoethanolamine and adipic acid and make intermediate product (1) and prepare.Use sulfuric acid and calcium sorbate as catalyst, make the intermediate product (1) and chloropropylene oxide reaction of gained.Subsequently, solids content is adjusted to 12-20w%, pH is adjusted to 3 by adding sulfuric acid by adding water.
Nano-granular calcium carbonate 1:
Have the isodiametric Norwegien Marmor of 45 μ m particle by continuously grinding, make nano-granular calcium carbonate.Under existence, grind as the 0.85w% sodium/magnesium-polyacrylate (based on the total dry weight of compound, MW is 6000g/mol) of grinding agent and 1w% polyethylene-polypropylene acid copolymer-sodium salt (based on the total dry weight of compound).To be ground to dried content be 72w% and have particle diameter as shown in table 2 with nano-calcium carbonate.
Table 2
Diameter (nm) Granule number (N) is in N% ??w％
??＜200 ??96.5 ??26.1
??200-400 ??2.7 ??20
??400-600 ??0.5 ??17.8
??600-800 ??0.1 ??13.3
??800-1000 ??＜0.1 ??8.8
The preparation of color compositions P1:
In KFM 2000D batch of material mixer/drying device, in the presence of the aqueous solution of 53.3kg adhesive 1, the granular talcum 1 of 400kg is carried out 10 minutes grinding.Subsequently, make the other homogenizing of mixture 10 minutes, thereby obtain intermediate product (2).
77.5kg nano-granular calcium carbonate 1 is mixed with 17.5kg water.Then, (MW:4000g/mol pH:8.5) adds in the solution and homogenizing 2 minutes with the Sodium Polyacrylate saline solution of 180g 42w%.Slurry was mixed 30 minutes with intermediate product (2).Subsequently, the sieve via 104 μ m filters this mixture.
The gained compound has the brookfield viscosity (after 5 days) of 108/109/112mPas, 8.86 pH and the solid content of 64.76w%.
In the compound of gained, nano-granular calcium carbonate does not separate with the granular talcum of micron.
Embodiment 1b, the preparation of P3
Granular talcum 1
The granular talcum that this embodiment uses is Finntalc P 05 Pulver, MONDO Minerals, Finland.
Adhesive 1:
Adhesive is adipic acid described in the embodiment 1a and N-2-aminoethyl-1,15% the aqueous solution of the copolymer of 2-ethylenediamine and chloropropylene oxide.
Nano-granular calcium carbonate 2:
Have the isodiametric Norwegien Marmor of 45 μ m particle by continuously grinding, make nano-granular calcium carbonate.Under existence, grind as the 0.85w% sodium/magnesium-polyacrylate (based on the total dry weight of compound, MW is 6000g/mol) of grinding agent.To be ground to dried content be 72w% and have particle diameter as shown in table 3 with nano-calcium carbonate:
Table 3
Diameter (nm) Granule number (N) is in N% ??w％
??＜200 ??97.4 ??23.6
??200-400 ??2.0 ??22.4
??400-600 ??0.4 ??18.7
??600-800 ??0.1 ??14
??800-1000 ??＞0.1 ??9.3
The preparation of color compositions P1:
In KFM 2000D batch of material mixer/drying device, in the presence of the aqueous solution of 53.3kg adhesive 1, the granular talcum 1 of 400kg is carried out grinding in 10 minutes.Subsequently, make the other homogenizing of mixture 10 minutes, thereby obtain intermediate product (3).
522.6kg nano-granular calcium carbonate 2 is mixed with 388kg water.Then, Sodium Polyacrylate saline solution and the 3kg NaOH (10w%) with 8.9kg 42w% adds in the solution.Slurry is mixed with intermediate product (3).Subsequently, the sieve via 104 μ m filters this mixture.
The compound of gained has the brookfield viscosity (after 5 days) of 76/75/77mPa (measuring), 8.65 pH and the solid content of 58.6w% after 5/60/170 minute.
In the compound of gained, nano-granular calcium carbonate does not separate with the granular talcum of micron.
Embodiment 1b, the preparation of printing substrate
Use color compositions P1, P2 to prepare three kinds of different coating compositions with P3.
Prepared coating composition as shown in the following Table 4.
Table 4
??C1 ??C2 ??C3
The pigment part Umber/weight Umber/weight Umber/weight
??P1 ??100 ??0 ??0
??P2 ??0 ??100 ??0
??P3 ??0 ??0 ??100
The adhesive part Umber/the weight of pigment Umber/the weight of pigment Umber/the weight of pigment
Latex DL 950 (styrene-butadiene latex) ??12 ??12 ??12
Nopcote C104 (calcium stearate lubricant) ??0.2 ??0.2 ??0.2
Mowiol 6-98 (PVA adhesive) ??0.3 ??0.3 ??0.3
Sterocoll HT (synthetic thickening agent) ??0.8 ??0.5 ??0.2
The coating pigment characteristic
Coating pigment solid matter (%) ??53.5 ??61.1 ??62.6
Brookfield viscosity (mPas) ??1230 ??790 ??1060
??pH ??8.6 ??8.5 ??8.6
In thermosetting roll web offset press, the printing substrate that makes is thus printed.Employed printing machine is the Albert-Frankenthal A 101S thermosetting roll web offset press with four blanket cylinder relative rolling type printing units and the 4 groups of long MEG Sigma of 8m hot-air drying devices.Print speed printing speed be 50000cpls/h (=6.2m/s), print the roll web outlet temperature through after the drying device be 90 ℃ and passing through chill roll after be 18.1 ℃.The damping water that uses in the printing is made of 3%HuberHit Redufix-R and 5%IPA, and its temperature is 10 ℃, and electrical conductivity is 740 μ S/cm, and pH is 5.6.Printing blanket is Day Durazone 5000.Employed printing-ink is a Huber Group 25H series ink, this printing ink has the following performance of using Tack-O-Scope to measure, and on the other side is another kind of commercially available printing ink (figure printing ink A is the 29H 3800 Rollo-Therm series of Huber Group).By as can be known following, the printing ink that uses in the printing is the ultrafast dry type that reaches peak viscosity the short time, and ink viscosity is low.
Reach the used time peak viscosity of peak viscosity
25H printing ink A 25H printing ink A
Black 251s 961s 152 192
Cyan 158s 444s 114 152
Pinkish red 124s 769s 94 169
Yellow 143s 761s 127 209
According to above-described measurement and evaluation method, to the printing substrate performance of all printing substrate S1, S2 and S3, promptly printing ink solidify, Cobb (w15), Cobb (o, C10), with contact angle, surface pore size and the K﹠amp of water; The N absorptivity is measured.In order to compare, at reference printing substrate NovaPress (R1), carry out identical measurement on the 70gsm, this reference printing substrate is Stora EnsoPublication Paper, the commercially available MWC hectographic printing paper that Veitsiluoto mill produces.NovaPress is coated with coating composition and the press polish in the supercalender with 12 stacked rollers that comprises calcium carbonate and clay.
The performance of printing substrate S1 of the present invention, S2 and S3 and reference printing substrate R1 is shown in table 5.
Table 5
??S1 ??S2 ??S3 ??R1
??Cobb(wl?5) ??(g/m 2) ??9.9 ??10.3 ??3.8 ??26
??Cobb(o，C10) ??(g/m 2) ??0.84 ??0.96 ??0.63 ??2.7
Printing ink solidifies (60s) ??0.02 ??0.02 ??0.12 ??0.14
Porosity (cm 2/m 3) ??2.9 ??2.9 ??2.7 ??5.5
The moisture (%) of paper before the printing ??4.3 ??4.0 ??4.0 ??3.5
The K﹠N absorptivity ??2.7 ??3 ??3.7 ??7.7
Is 86.1 ° for S3 through recording contact angle after the 0.1s.
Rill by measuring printing substrate S1, S3 and R1 is according to the method described above also identified by naked eyes, is estimated printing quality.For paper printing substrate S1, S2 and S3, dried plucking and wet plucking have also been measured.For paper printing substrate S2 and R1, measured passes to fail according to the method described above.Rill, plucking and passes to fail the results are shown in table 6.
Table 6
??S1 ??S2 ??S3 ??R1
Rill ??11.6 ??11.6 ??15.6
Wet plucking *) resistance FS (m/s) ??2.0 ??2.5 ??＞4.0
Dried plucking resistance FS (m/s) ??0.8 ??＞3.0 ??＞3.0
??passes?to?fail ??(Nr.) ??8 ??5
*) use the printing ink described in wet plucking test and the explanation of dried plucking method of testing n.2 n.3 S1 and S3 to be measured with printing ink respectively.
As shown in Table 5, compare with the reference printing substrate of prior art, the tendency that rill appears in paper of the present invention is obviously lower.Paper of the present invention also has high dried plucking resistance and wet plucking resistance and surface of good intensity (passes to fail), and this combines with low water imbibition and makes it possible to use rapid solidification printing ink.In addition, compare with R1, the printing surface of S1, S2 and S3 is more smooth and roughness is lower.
Although example has also been described the specific embodiments and the embodiment of product of the present invention and method, it should be recognized by those skilled in the art that and aspect wideer and to make changes and improvements as claimed in claim without departing from the invention.
Appendix I
Numbering pressure (MPa) numbering pressure (MPa) numbering pressure (MPa)
1?????0.0351????????41????1.9991????81????13.9311
2?????0.0406????????42????2.1967????82????14.2148
3?????0.0604????????43????2.3592????83????14.5709
4?????0.0803????????44????2.5239????84????14.8596
5?????0.1003????????45????2.6554????85????15.2299
6?????0.1252????????46????2.8544????86????15.5721
7?????0.1501????????47????3.0295????87????16.3823
8?????0.185?????????48????3.2629????88????16.9829
9?????0.2099????????49????3.4937????89????17.5186
10????0.2413????????50????4.0492????90????18.1955
11????0.2768????????51????4.5916????91????18.8334
12????0.2873????????52????5.4959????92????20.1199
13????0.3008????????53????5.7921????93????21.1192
14????0.3186????????54????6.1855????94????23.9643
15????0.3492????????55????6.6149????95????24.4351
16????0.4055????????56????6.983?????96????25.0901
17????0.4546????????57????7.6079????97????28.9628
18????0.5019????????58????7.9799????98????32.2049
19????0.553?????????59????8.3988????99????34.2826
20????0.5977????????60????8.7862????100????36.7433
21????0.6507????????61????9.0198????101????39.0274
22????0.6989????????62????9.3084????102????41.4373
23????0.7509????????63????9.6878????103????46.1483
24????0.7974????????64????10.0456???104????48.4397
25????0.85??????????65????10.3432???105????50.852
26????0.9012????????66????10.509????106????53.2377
27????0.9509????????67????10.724????107????55.6331
28????0.9992????????68????10.9551???108????58.1834
29????1.0475????69????11.158?????109????60.4795
30????1.1267????70????11.3517????110????65.1204
31????1.2053????71????11.5598????111????67.6779
32????1.2508????72????11.7114????112????69.8604
33????1.2727????73????11.8947
34????1.3025????74????12.0943
35????1.4483????75????12.3066
36????1.574?????76????12.4522
37????1.6299????77????12.6887
38????1.7063????78????12.9838
39????1.8493????79????13.3224
40????1.9533????80????13.5873

Claims (11)

1. printing substrate that is used for intaglio printing and hectographic printing, this printing substrate has:
(i) be lower than 15g/m 2Cobb (w15) value;
(ii) be lower than 1.2g/m 2, preferably be lower than 1g/m 2Cobb (o, C10) value; With
(iii) be lower than 0.5, preferably be lower than 0.3 printing ink and solidify.
2. the printing substrate of claim 1, wherein this printing substrate also has and is not more than 90 ° and contact angle water.
3. according to each printing substrate in the aforementioned claim, wherein this printing substrate is coated with the coating composition that comprises color compositions.
4. according to the printing substrate of claim 4, wherein said color compositions comprises calcium carbonate.
5. according to the printing substrate of claim 5, wherein said color compositions comprises quantity and is at least 10% of this color compositions, most preferably at least 20% calcium carbonate.
6. according to each printing substrate in the aforementioned claim; wherein said color compositions comprises the calcium carbonate granule of particulate talcum that spherical diameter is a micron-scale, nano-scale and comprises the adhesive of copolymer, and this copolymer comprises at least a dicarboxylic acid monomer and at least a monomer that is selected from diamines, triamine, dioxane hydramine or three alkanolamines.
7. according to each printing substrate in the claim 3～6, wherein said color compositions comprises about 3: 1 to about 1: 3 calcium carbonate and talcum.
8. the printing substrate of a printing comprises: according to each printing substrate in the claim 1 to 7, and be printed in thermosetting roll web offset printing ink on this printing substrate.
9. a thermosetting roll web offset printing method may further comprise the steps: at least one thermosetting cement printing machine group, to printing according to each printing substrate in the claim 1～7; And dry this printing substrate.
10. according to the thermosetting roll web offset printing method of claim 9, wherein said drying is to make the maximum web temperature that is reached in the drying be lower than 130 ℃, preferably is lower than to carry out under 100 ℃ the temperature.
11. a piece of paper offset printing method comprises the steps: printing according to each printing substrate in the claim 1～7.
CN200880006955A 2007-02-05 2008-02-04 a printing substrate Pending CN101680188A (en)

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FI20070635A FI20070635A0 (en) 2007-02-05 2007-08-22 Press Substrates
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US6641875B2 (en) * 2001-08-31 2003-11-04 Eastman Kodak Company Ink jet recording element
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