CN102782216A - Coated printing paper and process for producing same - Google Patents
Coated printing paper and process for producing same Download PDFInfo
- Publication number
- CN102782216A CN102782216A CN2011800108097A CN201180010809A CN102782216A CN 102782216 A CN102782216 A CN 102782216A CN 2011800108097 A CN2011800108097 A CN 2011800108097A CN 201180010809 A CN201180010809 A CN 201180010809A CN 102782216 A CN102782216 A CN 102782216A
- Authority
- CN
- China
- Prior art keywords
- coating
- coating fluid
- printing
- paper
- coated 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.)
- Granted
Links
- 238000007639 printing Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 285
- 239000011248 coating agent Substances 0.000 claims abstract description 260
- 239000012530 fluid Substances 0.000 claims abstract description 148
- 229920000642 polymer Polymers 0.000 claims abstract description 27
- 239000011247 coating layer Substances 0.000 claims abstract description 20
- 239000000178 monomer Substances 0.000 claims abstract description 10
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003607 modifier Substances 0.000 claims description 65
- 239000000049 pigment Substances 0.000 claims description 55
- 239000003513 alkali Substances 0.000 claims description 43
- 239000012528 membrane Substances 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 15
- 238000013459 approach Methods 0.000 claims description 12
- 238000009826 distribution Methods 0.000 claims description 10
- 238000004438 BET method Methods 0.000 claims description 7
- 238000007766 curtain coating Methods 0.000 abstract 1
- 239000004034 viscosity adjusting agent Substances 0.000 abstract 1
- 239000000123 paper Substances 0.000 description 149
- 239000007787 solid Substances 0.000 description 24
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 22
- 229920002472 Starch Polymers 0.000 description 17
- 235000019698 starch Nutrition 0.000 description 17
- 239000008107 starch Substances 0.000 description 17
- 239000010410 layer Substances 0.000 description 16
- 239000007767 bonding agent Substances 0.000 description 13
- 239000007788 liquid Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 239000000839 emulsion Substances 0.000 description 11
- 239000000976 ink Substances 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 229910000019 calcium carbonate Inorganic materials 0.000 description 8
- 241000276489 Merlangius merlangus Species 0.000 description 7
- 229920001577 copolymer Polymers 0.000 description 7
- 239000002174 Styrene-butadiene Substances 0.000 description 6
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 229940088417 precipitated calcium carbonate Drugs 0.000 description 6
- 239000011115 styrene butadiene Substances 0.000 description 6
- 229920003048 styrene butadiene rubber Polymers 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000005995 Aluminium silicate Substances 0.000 description 5
- 235000012211 aluminium silicate Nutrition 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000005021 gait Effects 0.000 description 5
- 238000009499 grossing Methods 0.000 description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 240000003183 Manihot esculenta Species 0.000 description 3
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000007645 offset printing Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 229910021532 Calcite Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 241000243251 Hydra Species 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011111 cardboard Substances 0.000 description 2
- 229920006184 cellulose methylcellulose Polymers 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- QRXWMOHMRWLFEY-UHFFFAOYSA-N isoniazide Chemical compound NNC(=O)C1=CC=NC=C1 QRXWMOHMRWLFEY-UHFFFAOYSA-N 0.000 description 2
- 238000007561 laser diffraction method Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 235000018102 proteins Nutrition 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000000790 scattering method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010023 transfer printing Methods 0.000 description 2
- 241000345998 Calamus manan Species 0.000 description 1
- 201000007336 Cryptococcosis Diseases 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 108010073771 Soybean Proteins Proteins 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- LCJHLOJKAAQLQW-UHFFFAOYSA-N acetic acid;ethane Chemical compound CC.CC(O)=O LCJHLOJKAAQLQW-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 230000003254 anti-foaming effect Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- FXBZWPXBAZFWIY-UHFFFAOYSA-N butyl prop-2-enoate;ethenyl acetate Chemical compound CC(=O)OC=C.CCCCOC(=O)C=C FXBZWPXBAZFWIY-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000009193 crawling Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- SDIXRDNYIMOKSG-UHFFFAOYSA-L disodium methyl arsenate Chemical compound [Na+].[Na+].C[As]([O-])([O-])=O SDIXRDNYIMOKSG-UHFFFAOYSA-L 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000006266 etherification reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005227 gel permeation chromatography Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- HTEAGOMAXMOFFS-UHFFFAOYSA-N methyl 2-methylprop-2-enoate;prop-2-enoic acid Chemical compound OC(=O)C=C.COC(=O)C(C)=C HTEAGOMAXMOFFS-UHFFFAOYSA-N 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 239000001254 oxidized starch Substances 0.000 description 1
- 235000013808 oxidized starch Nutrition 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- YARNEMCKJLFQHG-UHFFFAOYSA-N prop-1-ene;styrene Chemical compound CC=C.C=CC1=CC=CC=C1 YARNEMCKJLFQHG-UHFFFAOYSA-N 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 235000012950 rattan cane Nutrition 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 235000019710 soybean protein Nutrition 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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
- 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
- D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
- D21H23/48—Curtain coaters
Abstract
A process is provided in which fine uncoated spots (craters) are less apt to result even from high-speed coating and by which coated printing paper having excellent white-sheet quality and bringing about excellent print quality is efficiently produced through curtain coating. The process for producing coated printing paper comprises passing base paper through a curtain of a coating fluid to form a coating layer on the base paper, the coating fluid having a breakage time of 500 ms or longer and a Brookfield viscosity at 30 DEG C of 1,000-3,000 MPa.s and containing a viscosity modifier which comprises a polymer consisting mainly of acrylic monomer units and having a molecular weight of 400,000 or higher.
Description
Technical field
The present invention relates to the manufacturing approach of coated paper for printing and coated paper for printing, particularly relate to the coated paper for printing that adopts curtain formula coating method and obtain and the manufacturing approach of coated paper for printing.
Background technology
At present, in the manufacturing of coated paper for printing, adopt scraper type coating process and the print roll coating method that belongs to the contact coating method usually.
As the characteristic of the scope of operation of these contact coating methods, can enumerate operating efficiency has this point of the limit.That is, in the coating method of contact, scraper or nip rolls are situated between and are contacted with body paper by coating, and therefore, the load that puts on body paper increases, and the possibility that disconnected paper takes place is high.Faster this trend of coating speed is big more, and the frequency of disconnected paper increases tremendously.In addition, the equipment that comes in contact during coating, scraper or roller are depleted unavoidablely, need carry out regular replacing as running stores.And in the coating method of contact, coating apparatus contacts with coating fluid always, therefore, on coating apparatus, adheres to dirt easily, and disadvantages such as coating defects can appear taking place in its result, therefore needs regular cleaning.Like this, can exist the operating efficiency of contact coating method that the poor more problem of the faster efficient of the limit, particularly coating speed is arranged.
In addition, the characteristic as the quality aspect of contact coating method has following point.That is, scraper coating is that coating fluid is coated after the body paper, the coating fluid of surplus is struck off and formed the levelling coating (smoothing coating) of required coating weight with scraper, is the so-called coating process of metering method afterwards.Therefore, the flatness of coated face becomes well, but coating weight can receive the concavo-convex influence of body paper, therefore becomes the coated face of mottling easily.When serious, coating fluid is scraped owing to scrape the degree that the body paper surface causes fiber to expose at the body paper protuberance with scraper.Because the deviation of such coating weight, the infiltration that can produce printing ink during printing is poor, because printing ink density unevenness, gloss uneven, can produce and is difficult to obtain this problem of good printing surface.On the other hand, roller coat cloth be with the coating that on roller, measures in advance be transferred to that body paper is coated with, so-called before the coating process of metering method.Therefore, have following problem: needs expand to the coating of aequum on the roller in advance equably, need complicated apparatus, operation.In addition, be easy to generate the pattern of muscle shape during coating, it is very difficult obtaining there is not the coated face of crawling, and viscosity, the concentration of employable coating fluid are limited.In addition, when on the roller of print-on coating liquid, sneaking into foreign matter, might be created in the part that does not have transfer printing that the coating fluid on the roller is arranged on the body paper.
With respect to aforesaid contact coating method, known have curtain formula coating method, contactless coating processes such as spraying coating method etc.Thereby curtain formula coating method is to form the film of coating fluid and on this film, lead to body paper is provided with coating layer on body paper coating method, and equipment does not contact with body paper fully when coating.Therefore, aspect operation, the disconnected paper during coating reduces, and also can not produce running stores.In addition, also constant even coating speed rises to the load of body paper, therefore can carry out the ultrahigh speed coating.In addition, the coating of curtain formula is the coating method of preceding metering, and the coating that falls is all transferred to body paper.Therefore, the management of coating weight is easy, just can obtain the coated paper of required coating weight through management concentration, flow.On the other hand, aspect quality, through forming the curtain type membrane of uniform coating, it is even that the coating weight of width, flow direction becomes.In addition, owing to be noncontact, carry out transfer printing, can obtain the coating layer of uniform thickness, the lining property of body paper is also become good so can coating be pressed into body paper ground.Like this, owing to adopt curtain formula coating method can obtain uniform coating layer, when printing, have difficult the generation because of the uneven advantages such as pit that cause of absorption of inks.And then gas permeability also becomes well, so anti-foaming characteristic (Block リ ス タ ー fits property) improves.
As stated, curtain formula coating method is very excellent rubbing method, has proposed the application in pressure-sensitive carbon paper (patent documentation 1), heat-sensitive paper (patent documentation 2), cardboard coating wax etc.
In addition, also proposed common printed scheme with coated paper importing curtain formula coating method.For example, even also proposed use to add auxiliary agent such as the tackifier not coating of the proterties of easy fracture (stringiness) that is stretched also, reduce the manufacturing approach (patent documentation 3) of the coated paper for printing that pitfall (crater) produces.Yet through adding specific tackifier, though the stringiness of coating is improved, viscosity rises sometimes, and the deaeration property of coating can variation.
In addition; Proposed to use the method (patent documentation 4) of the high body paper of flatness; Because the flatness of body paper is high, accumulates so the wiring meeting that body paper and curtain type membrane touch is called as the coating of swingboat ripple (パ De リ Application グ), is easy to generate coating defects (non-patent literature 1).In addition, roll processing such as processing for the flatness that improves body paper, so density rises the reduction of qualities such as opacity reduction.
The prior art document
Patent documentation
Patent documentation 1: the spy opens clear 54-85811 communique
Patent documentation 2: the spy opens clear 54-74761 communique
Patent documentation 3: the spy opens flat 6-294099 communique
Patent documentation 4: the spy opens flat 5-247890 communique
Non-patent literature
Non-patent literature 1: her rattan one acute hearing etc. " adopt the research of the pigment coated paper of high speed curtain formula coating ", the 70th paper pulp is studied presentations main idea collection, 130～133 pages, in September, 2003
Summary of the invention
As stated, import curtain formula coating method with coated paper and have several problems common printed, require harmless curtain formula coating good operation property, also can stably make high-quality common printed method when making with coated paper with higher speed.
Even problem of the present invention provides a kind of high-speed coating and also be difficult for to produce small uncoated (below be also referred to as " pitfall "), can adopt curtain formula coating high-efficient ground to make the technology of the coated paper for printing of blank sheet of paper quality and press quality excellence.
From the viewpoint of quality, drying energy, coating speed, the coating fluid that is used for common coated paper for printing can't reduce concentration, viscosity.For example, the general viscosity of coating that the chromonic layer of heat-sensitive paper, pressure-sensitive carbon paper is used is about 100～400mPas, and is relative therewith, the coating fluid when making common coated paper for printing, and viscosity is about 1000～4000mPas.If the full-bodied coating fluid that this common coated paper for printing is used directly uses as the coating fluid of curtain formula coating, then curtain type membrane is invaded bubble easily, causes uncoated to present the pockmarks shape at coated face because of bubble sometimes.
In addition, if the difference of the gait of march (coating speed) of the speed of fall of the curtain type membrane that the employing coating fluid forms and body paper is big, then produce small uncoated (pitfall) sometimes.As the main cause of pitfall, can enumerate because the gait of march of the speed of fall of curtain type membrane and body paper poor, stretch coating fluid at direct of travel with several times speed, therefore, curtain type membrane has just just contacted with body paper and has ruptured.And; This bubble trace is owing to the differing from of gait of march (coating speed) of the speed of fall and the body paper of curtain type membrane is stretched; Become originally the several times length of the size of the bubble that produces, so can become king-sized problem when with coated paper, carrying out high-speed coating as common printed.As other main causes that produce pitfall; Can enumerate the flatness of body paper when coarse; No matter whether body paper advances at a high speed; The lining of coating fluid all can the gap occur between body paper and coating fluid, shrink because of coated film when dry or the air in gap expand coating fluid by film rupture, coated film produces pitfall.
In addition, also have following problem: owing to being accompanied by body paper the flowing of the air that moves of advancing, the curtain type membrane of coating fluid is disorderly, and then forms coating defects.Coating speed is fast more, and this problem is obvious more.
The inventor studies the operation property and the quality of the coating of curtain formula from the aspect of coating fluid prescription repeatedly; The result finds: eliminating owing to the differing from aspect the pitfall that causes of the gait of march (coating speed) of the speed of fall and the body paper of the curtain type membrane that is formed by coating fluid, the aqueous character of coating fluid is important.
Particularly the inventor finds: through the coating fluid that use has specific fracture characteristics and viscosity, can adopt curtain formula coating high-efficient ground to make pitfall and produce the high-quality coated paper for printing that is inhibited, thereby accomplish the present invention.
But be not limited thereto, the present invention contains following invention (1)～(3).
(1) a kind of manufacturing approach of coated paper for printing; Body paper is led in the curtain type membrane of coating fluid and on body paper, form coating layer; The rupture time of said coating fluid is that 500ms Type B viscosity above, 30 ℃ is 1000mPas～3000mPas; And said coating fluid comprises viscous modifier, and it serves as that the main molecular weight that forms is the polymer more than 400,000 that this viscous modifier contains with the acrylic monomer unit.Said viscous modifier is preferably alkali tackify type or non-alkali tackify type.In addition, it is the pigment below 2.0 that said coating fluid preferably contains flat ratio, and said flat ratio is represented with following formula:
The specific area that flat ratio=use BET method is obtained/suppose that by laser diffraction formula size distribution particle is the specific area that desirable spheroid is obtained.
(2) a kind of coating fluid that is used for coated paper for printing is carried out the coating of curtain formula; Wherein, The rupture time of coating fluid is that 500ms Type B viscosity above, 30 ℃ is 1000mPas～3000mPas; And said coating fluid contains viscous modifier, and it is that the main molecular weight that forms is the polymer more than 400,000 that this viscous modifier contains by the acrylic monomer unit.
(3) a kind of coated paper for printing adopts the coating of curtain formula that said coating fluid is applied on the body paper and obtains.
According to the present invention, also be difficult for producing all excellent coated paper for printing of small uncoated (pitfall), blank sheet of paper quality and press quality even can adopt curtain formula coating high-efficient ground to make high-speed coating.
The specific embodiment
［ coating fluid ］
The rupture time of the coating fluid that uses among the present invention is as more than the 500ms, and 30 ℃ Type B viscosity is 1000～3000mPas.The curtain formula coating fluid that has this specific character through use particularly also can suppress the generation of pitfall during high-speed coating.
The rupture time of so-called coating fluid among the present invention is the value of the easy property of stretching (stringiness) of expression coating fluid.This value is big more, will become the high more coating fluid of stringiness.Rupture time among the present invention is obtained through following mode; Promptly; 1) be configured to and axle vertical a pair of diameter coaxial with viscosimeter be between the circular slab of 8mm (spacing 3mm) to enclose the liquid temperature be 30 ℃ coating fluid; 2) plate of the top speed with 300mm/ second is vertically drawn high 6mm and keeps this state, 3) measure drawing high the time till rupture to the coating fluid fibril zero hour from said plate.The time that fibril takes place before the fracture is preferably used laser determination, about the preferred 2ms of temporal resolution of this moment.The example that can carry out the device of this mensuration comprises elongation viscosity meter (the machine name: CaBER1) of Thermo Haake corporate system.
If the rupture time of coating fluid is shorter than 500ms; Then because the gait of march (coating speed) of the speed of fall of the curtain type membrane that forms by coating fluid and body paper poor; Coating fluid can't be followed the curtain type membrane elongation that moment takes place when contacting with body paper, curtain type membrane fracture and produce the small uncoated portion of pitfall shape.That is, preferred coating speed is fast more, and the stringiness of coating fluid is also high more.
Therefore, the rupture time of the coating fluid that uses when making coated paper for printing is long more preferred more, more preferably more than the 500ms, more than the further preferred 700ms.
Yet, even rupture time is more than the 500ms, if but coating fluid surpasses 3000mPas 30 ℃ Type B viscosity; The deaeration property variation of coating fluid then; And then the reduction of the stability of curtain type membrane, and, can generate perforate, generation pitfall at coating layer because of bubble causes; Therefore, the remarkable variation of the quality of coated paper.In addition, if the said Type B viscosity of coating fluid surpasses 3000mPas, then the liquor charging of coating fluid becomes difficult, and is therefore unsuitable.In addition, if said Type B viscosity is lower than 1000mPas, then exists and be difficult to keep the quality variation of stringiness, coated paper, the trend of operation property variation.The Type B viscosity of coating fluid is preferably used the rotor of No.4 among the present invention, measures with the rotary speed of 60rpm.
In order to prepare the coating fluid that has above-mentioned characteristic among the present invention, can preferably use viscous modifier.The viscous modifier that uses among so-called the present invention is the medicament with effect that the flowability of coating fluid is adjusted, and can easily prepare the coating fluid with the rupture time more than the 500ms through cooperating viscous modifier.
The rupture time of the coating fluid that uses among the present invention, the characteristic of viscosity mainly can be adjusted through the addition of viscous modifier, if the adjustment of viscosity a little then also can be adjusted through the solid component concentration that improves coating fluid.This be because, through improving solid component concentration, be easy to generate pigment particles and the interaction between other complexs in the coating fluid, can prolong the rupture time of coating fluid.
Viscous modifier of the present invention so can improve the solid component concentration of coating fluid, can also improve the press quality of coated paper owing to give the viscosity of not too high appropriateness to curtain formula coating fluid.In this case, the solid component concentration of coating fluid is not special to be limited, more than the preferred 60 weight %, more preferably more than the 63 weight %.The also not special restriction of the upper limit of solid component concentration is if consider liquor charging property etc., below the then preferred 75 weight %, more preferably below the 70 weight %.
［ viscous modifier ］
As the viscous modifier that uses among the present invention, can enumerate that to contain with the acrylic monomer unit serve as that the main molecular weight that forms is the viscous modifier of the polymer more than 400,000.So-called serves as the main polymer that forms with the acrylic monomer unit, is meant the polymer that is formed by the acrylic monomer unit more than the 50 weight %.Residual monomer unit in the polymer can be known monomeric unit.
As this viscous modifier, can enumerate the viscous modifier of alkali tackify type or non-alkali tackify type.The viscous modifier of so-called alkali tackify type; Be meant in the aqueous solution of viscous modifier, or be scattered at viscous modifier and add after alkali makes the pH of aforesaid liquid be alkaline range arbitrarily the viscous modifier that the viscosity of aforesaid liquid rises in the dispersion liquid that forms in the water.Contained polymer can be water-soluble in the viscous modifier of alkali tackify type, perhaps also can in water, disperse and forms emulsion.Yet the viscous modifier of alkali tackify type is the emulsion that in water, forms of polymer dispersed preferably, and full-bodied liquid is destroyed, become to this emulsion through adding alkali with the micella of the polymer in the above-mentioned emulsion.
Like this, the viscous modifier of alkali tackify type has the effect that the whole viscosity of coating fluid is increased.And; The viscous modifier of alkali tackify type also has following effect: the polymer (polymer) that exists in the viscous modifier of (micella destroy back) behind the tackify is adsorbed onto on the pigment that cooperates in the coating fluid, the latex particle and forms tridimensional network, thereby gives structural viscosity to coating fluid.
The coating fluid that in the manufacturing of coated paper for printing, uses, in general, therefore the inclined to one side alkali side of pH, if use the viscous modifier of alkali tackify type, then can improve rupture time, the Type B viscosity of coating fluid effectively.In addition, the molecular weight of the polymer in the viscous modifier is big more, and the effect that the rupture time, Type B viscosity of coating fluid, particularly stringiness are increased is high more, and therefore, the molecular weight of the polymer in the viscous modifier that uses among the present invention is more than 400,000.But, the too high then excessively rising of the viscosity of coating fluid sometimes of molecular weight, therefore the molecular weight of preferred above-mentioned polymer is below 4,000,000.The molecular weight of polymer is meant the weight average molecular weight that in gel permeation chromatography, is converted into polystyrene and tries to achieve among the present invention.
The addition of the viscous modifier of alkali tackify type is 0.1～1.0 weight portion with respect to the pigment total solid composition in the coating fluid preferably, more preferably 0.1～0.5 weight portion.If addition is less than 0.1 weight portion, then can't give enough rupture times to coating fluid, if add more than 1.0 weight portions, then the viscosity of coating fluid rises, the deaeration property of coating fluid significantly reduces.
On the other hand; The viscous modifier of so-called non-alkali tackify type; Be meant in the aqueous solution of viscous modifier, or when viscous modifier is scattered in the pH that adds alkali arbitrarily in the dispersion liquid that water forms and make aforesaid liquid and is alkaline range, the viscous modifier that the viscosity of aforesaid liquid increases hardly.
With regard to the viscous modifier of this non-alkali tackify type, though preferred in the aqueous solution of polymer, or in the emulsion that polymer dispersed forms, add alkali in water, chemical change etc. does not take place in polymer yet.As the contained polymer of viscous modifier of non-alkali tackify type, preferably enumerating pH polycarboxylate stable, that formed by the acrylic monomer unit is main polymer.This polymer can be water-soluble, also can be dispersed in and form emulsion in the water.
The molecular weight of above-mentioned polymer is high more, and the viscosity under the shearing force reduces more little, and therefore, the effect of coating fluid being given stringiness is high more.Therefore, the molecular weight of the polymer that viscous modifier contained of non-alkali tackify type is more than 400,000, and is preferred more than 800,000.But because the viscosity of molecular weight rising coating fluid also rises, therefore the molecular weight of preferred above-mentioned polymer is below 4,000,000.
As stated, the viscous modifier of alkali tackify type is neutralized and tackify at alkaline range.Therefore in having the system of free metal ion, system is difficult for becoming alkalescence, and the tackify effect is not remarkable sometimes, and particularly high concentration is combined with the coating fluid of calcium carbonate, and the tackify effect is not remarkable sometimes.On the other hand, for the viscous modifier of non-alkali tackify type, even there is the system of free metal ion, the tackify effect does not change yet, even therefore the high concentration coating fluid that is combined with calcium carbonate also can be given stringiness effectively.
The viscous modifier that also can and be with natural polysaecharides such as starch, CMC among the present invention can be adjusted the flowability of coating fluid as viscous modifier through adding various starch.As the starch that uses among the present invention, not special restriction can be used for example with the starch as raw material such as edible tapioca starch, corn.Wherein, it is high to be with edible tapioca starch that the acetylated starch of raw material is given the effect of stringiness, is preferred.
［ pigment ］
Among the present invention, the coating fluid of supplying with the coating of curtain formula contains pigment.The pigment that in coating fluid, cooperates is restriction not, can use the pigment that all the time is used for the coated paper purposes.For example; Can use organic pigments such as inorganic pigments such as kaolin, clay, powdered whiting, precipitated calcium carbonate, titanium dioxide, barium sulfate, calcium sulfate, zinc oxide, silicic acid, silicate, cataloid, satin white, plastic pigment, organic and inorganic composite pigment etc., these pigment can use separately as required or use mixing more than two kinds.
Among the present invention, on this aspect of deaeration property of coated paper quality, coating fluid, compare, preferably in coating fluid, cooperate pigment near spherical shape with pigment with plate-like shape.Specifically; The preferred use adopts specific area that the BET method obtains divided by being that the value (flat ratio) that specific area that desirable spheroid calculates gets is the pigment below 2.0 by the size distribution supposition particle that adopts the laser diffraction formula to measure, and more preferably using flat ratio is the pigment below 1.5.Flat ratio can be represented with following formula.
The specific area that flat ratio=employing BET method is obtained/suppose that by laser diffraction formula size distribution particle is the specific area that desirable spheroid is calculated
The numerical value of flat ratio is high more, and the flatness of pigment is high more, and the numerical value of flat ratio approaches 1 more, means that pigment approaches desirable spheroid more.If using flat ratio is the pigment 2.0 below,, can be thought of as following reason though then the coated paper quality becomes good the clearly qualification of detailed reason.With regard to the coating of the curtain formula of contactless coating method, think and compare when using flat pigment, to have pigment and be difficult to the trend that the direct of travel at body paper is orientated with the contact coating method; If use flat pigment in a large number, then pigment can't be orientated regularly, and the flatness on coated paper surface reduces; In addition; Increase in the space of coating layer, the infiltration aggravation of the printing ink when then printing, and print gloss can reduce.
In addition, be the pigment below 2.0 if use flat ratio, the then deaeration property raising of coating fluid, the generation of pitfall also is inhibited.That is, if use flat ratio to surpass 2.0 flat pigment, then therefore the mobile meeting of bubble is hindered by flat pigment that deaeration property reduces easily during deaeration; Relative therewith; If using flat ratio is the torulose pigment below 2.0, then be difficult for hindering moving of bubble, deaeration property is difficult to reduce.
In addition; Among the present invention; As pigment; Be to carry out the calcium carbonate that case of wet attrition obtains through precipitated calcium carbonate with the crystallization of spindle shape calcite, the preferred average grain diameter (d50: be that 0.1～0.5 μ m, BET specific area are 10～30m the particle diameter of accumulating 50 weight %) that measures through X ray transmission-type particle size distribution device that uses
2The sharpness of the size distribution that the scope of/g, the use following formula that uses X ray transmission-type particle size distribution device to measure are represented is the calcium carbonate more than 50.If use this calcium carbonate, then can obtain the excellent coated paper for printing of ink bleed as pigment.
Sharpness=(d30/d70) * 100
［ in the formula, d30 is the particle diameter of accumulation 30 weight %, and d70 is the particle diameter of accumulation 70 weight % ］
In addition, when using above-mentioned calcium carbonate among the present invention, as the precipitated calcium carbonate before pulverizing, preferably use fusoid primary particle aggegation and form rose (ロ ゼ ッ タ) shape offspring and the calcite crystallization.At this moment, the precipitated calcium carbonate before more preferably pulverizing is that 1.4～3.0 μ m, BET specific area are 4～12m with the average grain diameter (d50) of X ray transmission-type particle size distribution device mensuration
2/ g.And then, when using above-mentioned calcium carbonate among the present invention, preferably use the multi-pass type pulverizer to carry out case of wet attrition.Through the preferred per 100 weight portion pigment of the use level of the calcium carbonate of this pulverizing is 40～100 weight portions, more preferably 60～90 weight portions.
［ bonding agent ］
In the present invention, preferably in curtain formula coating fluid, cooperate bonding agent (binding agent).For the not special restriction of the bonding agent that uses, can use the bonding agent that all the time is used for the coated paper purposes.For example; Can suitably select in the following bonding agent a kind with on use; That is, various copolymers such as styrene-butadiene system, styrene-propene acid system, ethane-acetic acid ethyenyl ester system, butadiene-methyl methacrylate system, vinyl acetate-butyl acrylate system and polyvinyl alcohol, copolymer-maleic anhydride, acrylic acid-methyl methacrylate based copolymer etc. are synthetic is bonding agent; Casein, soybean protein, synthetic proteins etc. are protein-based; Starch based such as etherification starch, dextrin such as oxidized starch, positive starch, urea organic phosphate starch, ethoxy etherificate starch; Common coated papers such as cellulose derivative such as carboxymethyl cellulose, hydroxyethylcellulose, CMC are used bonding agent.In these bonding agents, the polyvinyl alcohol of low polymerization degree (degree of polymerization is about 500) owing to can not making viscosity significantly improve adhesive effect with rising, and is therefore preferred.
The preferred per 100 weight portion pigment of these bonding agents are 5～50 weight portions, more preferably use in the scope about 8～30 weight portions.
In addition, of the back, can make curtain formula coating layer form multilayer among the present invention.Particularly curtain formula coating layer is being made as orlop near body paper, intermediate layer and during apart from these three layers of the body paper the superiors farthest, preferably the weight ratio of the bonding agent of each layer is 1:0.5～0.8:0.7～1.0.Through being made as such cooperation, can reduce the amount of employed bonding agent, can reduce manufacturing cost.
［ other ］
In the present invention, the various auxiliary agents that also can be as required suitably use dispersant, tackifier, water retention agent, antifoaming agent, anti-hydrated agent, colouring agent, surfactant etc. to cooperate at coated paper usually with pigment.
［ body paper ］
The not special restriction of the body paper that uses among the present invention can be used the fine paper of general use, intermediate paper, coarse paper, machine-coated paper, art paper, cast-coated paper, synthetic paper, resin coated paper, plastic film etc. bar none.
In addition, also bring into play required effect, therefore also can use the low body paper of flatness, when the curtain formula is coated with, be not called as in the scope that the coating of swingboat ripple accumulates, can use the high body paper of flatness even the flatness of body paper is low in the present invention.In addition, as the method for the flatness that improves body paper, processing is effective before the coating of curtain formula, to carry out that precompressed is prolonged etc.
And, as the method for improving the body paper flatness, can use before curtain formula coating, be coated with in advance with starch as the clear dope of principal component, contain the body paper that the coating of pigment obtains.In addition, about the pre-coating before the curtain formula coating, can use bar none without the direct state of the body paper after carrying out curtain formula coating etc., pre-coating under the moistening state of the coating on the body paper of drying process.
［ curtain formula coating layer ］
In the present invention, curtain formula coating layer is so long as get final product more than 1 layer.When curtain formula coating layer is multilayer; Have the specific fracture characteristics and a coating fluid of viscosity characteristics among the present invention; Can be used for random layer; Can be used for more than one deck, preferably the undermost coating fluid that joins of conduct and body paper or the coating fluid of the superiors use, and most preferably conduct is used with the undermost coating fluid that body paper joins.
［ coating of curtain formula ］
So-called curtain formula coating among the present invention, thus be coating fluid is flowed down with the curtain shape and to form film and logical body paper is provided with coating layer on body paper on this film coating method.The coating of curtain formula is the profile coating that forms coating layer along body paper, in addition, owing to be so-called preceding metering method, therefore has the characteristic of easy control coating weight.
In the present invention, coated paper through on the two sides of body paper or single face adopt the coating of curtain formula to carry out single or multiple lift to be coated with and to make.Carry out when multi-layer coated; Also can adopt the coating process except that the coating of curtain formula in the coating of one deck in office; For example; Can after adopting curtain formula apparatus for coating to carry out the coating of pigment application liquid, adopt the scraper apparatus for coating to carry out the coating of pigment application liquid, perhaps after carrying out the scraper coating, carry out the coating of curtain formula.
In the coating of curtain formula, can carry out under the situation of moist lower floor coating part, carrying out wet pressing wet (wet-on-wet) coating of upper strata coating.Particularly as previously mentioned; When being provided with three layers through curtain formula coating, preferably make each layer bonding agent match ratio as previously mentioned, after the coating orlop; Under moist undermost situation, form the intermediate layer, and under the situation in moist intermediate layer, form the superiors.If form three layers in this wise, then can when reducing the bonding agent use level, form good curtain formula coated film.
Each face of the coating weight of the coating layer among the present invention is counted 3～30g/m with dry weight
2Suit.Coating weight is less than 3g/m
2The time, because abundant covering paper substrate surface concavo-convex, so the acceptance of printing-ink significantly reduces sometimes.On the other hand, if the coating weight of a layer surpasses 30g/m
2, operation property reductions such as the drying property variation when then being coated with perhaps become the binding agent migration and cause printing uneven reason, and are therefore not preferred.When coating layer was made up of multilayer, also the coating weight of preferred each face was 30g/m
2Below.
In addition, when carrying out the coating of curtain formula among the present invention, can use the known device that uses in the coating of curtain formula.For example, be used to carry coating fluid pump, be used for defoaming device that coating fluid is outgased etc.
In the present invention, coated paper is through after being provided with coating layer on the body paper, makes through common drying process, can be as required carries out smoothing through surface treatment procedure etc. and handles.In optimal way, coated paper is dried and is processed into coated paper moisture after the manufacturing is 3～10 weight %, more preferably about 4～8 weight %.
And when carrying out smoothing and handling, can use common supercalender, gloss calender, soft press-polishing machine, hot pressing ray machine, boots formula calender smoothing treating apparatus such as (shoe calender).The smoothing treating apparatus with on the machine or the mode of off line suitably use, also suitably the number of the form of adjustment pressue device, press fixture, heat etc.
In the present invention, the coating speed of curtain formula coating can be arbitrary speed, is made as below 1000m/ minute and just can brings into play more excellent effect, and is therefore preferred.
The manufacturing approach of coated paper for printing of the present invention can be applied to cardboards such as white board.
Embodiment
Below, enumerate embodiment the present invention is described particularly, but the invention is not restricted to following example.In addition, short of special instruction, number range comprises its end points in this manual.
＜evaluation method＞
(1) rupture time: for Thermo Haake corporate system elongation viscosity meter (machine name: CaBER1); (spacing 3mm) inclosure liquid temperature is 30 ℃ a coating fluid between the circular slab that is configured to coaxial and a pair of diameter 8mm that axle is vertical; The plate of the top speed with 300mm/ second is vertically drawn high 6mm and keeps this state; Mensuration draws high the time that begins till the coating fluid fibril fracture from above-mentioned plate, as rupture time.
(2) Type B viscosity: adopt Tokyo Keiki Inc.'s system Brookfield viscometer, 30 ℃, use under the condition of rotor, 60rpm of No.4 and measure.
(3) flat ratio: to solid component concentration is that the pigment slurry of 8 weight % is carried out ultrasonic dispersing and handled, and is used for pigment and measures.With the value of the specific area that adopts the BET method to obtain divided by supposing that by the size distribution of the pigment that adopts laser diffraction and scattering method (using Malvern system Mastersizer to measure) to measure the value defined that specific area that particle calculates for desirable spheroid obtains is flat ratio.The specific area that the specific area of the reality that employing BET method is obtained is calculated greater than adopting laser diffraction and scattering method mensuration particle is assumed to desirable spheroid more; Represent the shape different more with spheroid; Therefore; The numerical value of above-mentioned flat ratio is high more, and the flatness of pigment is high more, and the numerical value of flat ratio means the more approaching desirable spheroid of pigment near 1 more.
The supposition particle of the specific area that flat ratio=use BET method is obtained/calculated by laser diffraction formula size distribution is the specific area that desirable spheroid is calculated
Flat ratio at the various pigment of obtaining with this method shown in the following table.
[table 1]
Table 1
(4) deaeration property: curtain formula when coating, adopt the state of the curtain type membrane that coating fluid forms through viewed in transmitted light, carry out visual valuation.Metewand is as follows.
◎: do not have bubble, zero fully: almost do not have bubble, △: residual a little bubble, *: a large amount of residual bubbles
(5) degree of pitfall (micro-uncoated portion) generation: dip coated paper in the aqueous solution that contains ammonium chloride 2.5 weight %, isopropyl alcohol 47.5 weight %; Make its burning 30 minutes in the drying machine that is heated to 200 ℃ with making its air dry behind the superfluous solution of rag wiping, being encased in.Then, adopt image analysis apparatus,, judge whether to possess quality as coated paper for printing by the situation occurred of the residual coating layer of white with the ratio affirmation pitfall of the body paper (paper pulp fiber) of black carbonization.In addition, the defective on the long ellipse that extends of machine direct of travel does not include among the lining rate owing to the bubble of coating fluid.Evaluation is carried out through visual, and its benchmark is as follows.
◎: do not have pitfall, zero fully: almost do not have pitfall, △: pitfall is few, *: pitfall is many
(6) smoothness (PPS):, under the condition of Hard Roll lining, 1000kPa, measure the smoothness of coated paper according to ISO 8791.
(7) press quality (pit): adopt ROLAND company's offset printing offset press (4 look); Make and offscreen use printing ink (Toyo Ink system HY Unity M); After printing with 8000/hour of print speed printing speeds, pit (the attaching the wall inequality) situation during benchmark visual valuation halftoning below adopting.
◎: very good, zero: good, △: poor slightly, *: poor
(8) printing surface sense (print gloss, printing surface sense): adopt ROLAND company's offset printing offset press (4 look); Make and offscreen use printing ink (Toyo Ink system HY Unity M); After printing with 8000/hour of print speed printing speeds; Comprehensively the print gloss printing ink of portion attaches the sense of wall property printing surface on the spot, and the benchmark below adopting carries out visual valuation.
◎: very good, zero: good, △: poor slightly, *: poor
(9) printing intensity (seal face glossiness): adopt ROLAND company's offset printing offset press (2 look); Make and offscreen use printing ink (Toyo Ink system HY Unity Y); After printing with 8000/hour of print speed printing speeds, the benchmark evaluation fuzzing of portion on the spot (picking) situation below adopting.
◎: do not have fuzzing, zero fully: almost do not have fuzzing, △: have slightly fuzzing, *: fuzzing is many
［ embodiment 1 ］
(preparation of coating fluid)
As pigment; Preparation is that 1.0 μ m, flat ratio are 1.0 powdered whiting (trade name: FMT-97 by average grain diameter; The FIMATEC corporate system) after the pigment slurry that forms,, adds styrene-butadiene emulsion copolymer (trade name: PA7082 with respect to pigment 100 weight portions; Japan A&L corporate system) viscous modifier (trade name: SNTHICKENER 929S of 12 weight portions, non-alkali tackify type; SAN NOPCO corporate system, molecular weight 600,000) 0.1 weight portion, surfactant (trade name: Newcol2308LY, Japanese emulsifying agent corporate system) 0.2 weight portion, fit printing improving agent (trade name: SPI-106N; SUMIKA CHEMTEX corporate system) behind 0.25 weight portion, the preparation solid component concentration is the coating fluid of 66 weight %.The viscosity of coating fluid is 2250mPas, and rupture time is 553ms.
(making of coated paper)
At senior body paper (grammes per square metre 66.5g/m
2) on, with each face 12g/m
2The mode of coating weight adopt curtain formula apparatus for coating to be coated with above-mentioned coating fluid with coating speed 900m/ minute, carry out drying, obtain coated paper for printing.
［ embodiment 2 ］
Coating speed was made as 1200m/ minute, in addition, likewise obtains coated paper for printing with embodiment 1.
［ embodiment 3 ］
The cooperation umber of viscous modifier is made as 0.2 weight portion, prepares the coating fluid that final solid component concentration is 58 weight %, in addition, likewise obtain coated paper for printing with embodiment 1.The viscosity of coating fluid is 1019mPas, and rupture time is 1593ms.
［ embodiment 4 ］
Use the acetyloxide helping digestion with tapioca (trade name: Genesize80; The GSL corporate system) viscous modifier (trade name: SOMAREX270 of 2 weight portions, alkali tackify type; SOMAR corporate system, molecular weight 950,000) 0.2 weight portion replaces viscous modifier 0.1 weight portion of non-alkali tackify type, prepares the coating fluid that final solid component concentration is 64 weight %; In addition, likewise obtain coated paper for printing with embodiment 1.The viscosity of coating fluid is 1330mPas, and rupture time is 737ms.
［ embodiment 5 ］
Coating speed was made as 1200m/ minute, in addition, likewise obtains coated paper for printing with embodiment 4.
［ embodiment 6 ］
Use the viscous modifier (trade name: SN THICKENER641 of alkali tackify type; SAN NOPCO corporate system; Molecular weight 470,000) 0.1 weight portion replaces viscous modifier 0.1 weight portion of non-alkali tackify type; Prepare the coating fluid that final solid component concentration is 66 weight %, in addition, likewise obtain coated paper for printing with embodiment 1.The viscosity of coating fluid is 2300mPas, and rupture time is 505ms.
［ embodiment 7 ］
Use the viscous modifier (trade name: SN THICKENER641 of alkali tackify type; The SANNOPCO corporate system; Molecular weight 470,000) 0.2 weight portion replaces the viscous modifier of non-alkali tackify type; Prepare the coating fluid that final solid component concentration is 62 weight %, in addition, likewise obtain coated paper for printing with embodiment 1.The viscosity of coating fluid is 1300mPas, and rupture time is 1495ms.
［ embodiment 8 ］
Coating speed was made as 1200m/ minute, in addition, likewise obtains coated paper for printing with embodiment 7.
［ embodiment 9 ］
In the manufacturing of the coated paper of embodiment 6, senior body paper uses coating fluid with braking club formula coating machine with 9g/m
2Primary coat is carried out and body paper (the grammes per square metre 80g/m that obtains in (two sides)
2); Said coating fluid is hydroxide precipitated calcium carbonate 100 weight portions, the urea organic phosphate starch (trade name: PLV500 of 1.2 μ m by the average grain diameter as pigment; Three with the starch corporate system) 17.5 weight portions, styrene-butadiene emulsion copolymer (trade name: SL-14; Nippon Paper chemical company system) 6.5 weight portions are formed, and in addition, likewise obtain coated paper for printing with embodiment 6.Above-mentioned hydroxide precipitated calcium carbonate is made according to conventional methods.
［ embodiment 10 ］
Use the viscous modifier (trade name: SN THICKENER641 of alkali tackify type; SAN NOPCO corporate system; Molecular weight 470,000) 0.4 weight portion replaces the viscous modifier of non-alkali tackify type; Prepare the coating fluid that final solid component concentration is 54 weight %, in addition, likewise obtain coated paper for printing with embodiment 1.The viscosity of coating fluid is 1021mPas, and rupture time is 574ms.
［ embodiment 11 ］
Using average grain diameter is that 0.2 μ m, flat ratio are 0.8 particulate kaolin (trade name: Hydra Gloss; The KaMin corporate system) replace powdered whiting as pigment; Prepare the coating fluid that final solid component concentration is 68 weight %; In addition, likewise obtain coated paper for printing with embodiment 6.The viscosity of coating fluid is 2430mPas, and rupture time is 580ms.
［ embodiment 12 ］
Using average grain diameter is that 1.0 μ m, flat ratio are 1.0 powdered whiting (trade name: FMT-97; The FIMATEC corporate system) 50 weight portions and average grain diameter are that 0.2 μ m, flat ratio are 0.8 particulate kaolin (trade name: Hydra Gloss; The KaMin corporate system) 50 weight portions are as pigment; Prepare the coating fluid that final solid component concentration is 67 weight %, in addition, likewise obtain coated paper for printing with embodiment 6.The viscosity of coating fluid is 2090mPas, and rupture time is 510ms.
［ embodiment 13 ］
Using average grain diameter is that 2.6 μ m, flat ratio are 2.9 engineering kaolin (trade name: CAPIM DG; The Imerys corporate system) replace powdered whiting as pigment; Prepare the coating fluid that final solid component concentration is 67 weight %; In addition, likewise obtain coated paper for printing with embodiment 6.The viscosity of coating fluid is 1114mPas, and rupture time is 720ms.
［ embodiment 14 ］
Using average grain diameter is that 1.0 μ m, flat ratio are that 1.0 powdered whiting (trade name: FMT-97, FIMATEC corporate system) 50 weight portions and average grain diameter are that 2.6 μ m, flat ratio are 2.9 engineering kaolin (trade name: CAPIMDG; The Imerys corporate system) 50 weight portions are as pigment; Prepare the coating fluid that final solid component concentration is 67 weight %; In addition, likewise obtain coated paper for printing with embodiment 6.The viscosity of coating fluid is 1250mPas, and rupture time is 620ms.
［ embodiment 15 ］ (coated paper) with three layers of curtain formula coating layer
(preparation of coating fluid)
As pigment; Preparation is by the powdered whiting (trade name: FMT-97 of average grain diameter 1.0 μ m, flat ratio 1.0; The FIMATEC corporate system) after the pigment slurry that forms,, adds the synthetic viscous modifier (trade name: SN THICKENER641 of alkali tackify type with respect to pigment 100 weight portions; SAN NOPCO corporate system; Molecular weight 470,000) 0.2 part, 13 parts of styrene-butadiene emulsion copolymers (trade name: PA7082, Japanese A&L corporate system), surfactant (trade name: Newcol2308LY, Japanese emulsifying agent corporate system) 0.2 weight portion, fits printing improving agent (trade name: SPI-106N; SUMIKA CHEMTEX corporate system) behind 0.25 weight portion, the preparation solid component concentration is that the orlop of 60 weight % is used coating fluid.The viscosity of this coating fluid is 1220mPas, and rupture time is 745ms.
The synthetic viscous modifier of alkali tackify type (trade name: SN THICKENER641, SANNOPCO corporate system, molecular weight 470,000) is 0.2 part; With respect to 100 parts of pigment, styrene-butadiene emulsion copolymer (trade name: PA7082, Japanese A&L corporate system) is 8 parts; And to make final solid component concentration be 63%; In addition, likewise operate with coating fluid, obtain the intermediate layer and use coating fluid with orlop.The viscosity of this coating fluid is 1610mPas, and rupture time is 1660ms.
The synthetic viscous modifier of alkali tackify type (trade name: SN THICKENER641; The SANNOPCO corporate system, molecular weight 470,000) be 0.2 part, with respect to 100 parts of pigment, styrene-butadiene emulsion copolymer (trade name: PA7082; Japan A&L corporate system) it is 10 parts; Making final solid component concentration is 61%, in addition, likewise obtains coating fluid with orlop with coating fluid.The viscosity of this coating fluid is 1350mPas, and rupture time is 790ms.
(making of coated paper)
Adopt the curtain formula apparatus for coating of slidingtype, with each face 12g/m
2Coating weight (orlop: 2g/m
2, intermediate layer: 8g/m
2, the superiors: 2g/m
2) mode with curtain formula apparatus for coating with 900m/ minute coating speed at senior body paper (grammes per square metre 66.5g/m
2) on be coated with, implement dryly, obtain coated paper for printing.
［ comparative example 1 ］ (alkali tackify type viscosity improver)
In the preparation of the coating fluid of embodiment 7, prepare the coating fluid that final solid component concentration is 54 weight %, in addition, likewise obtain coated paper for printing with embodiment 1.The viscosity of coating fluid is 821mPas, and rupture time is 374ms.
［ comparative example 2 ］ (ethoxy etherificate starch)
Use ethoxy etherificate starch (trade name: ETHYLEX2005; The Tate&Lyle corporate system) 4 weight portions replace viscous modifier; Prepare the coating fluid that final solid component concentration is 66 weight %, in addition, likewise obtain coated paper for printing with embodiment 1.The viscosity of coating fluid is 1000mPas, and rupture time is 277ms.
［ comparative example 3 ］ (alkali tackify type viscosity improver)
In the preparation of the coating fluid of embodiment 1; Use the viscous modifier (trade name: SN THICKENER641 of alkali tackify type; SAN NOPCO corporate system, molecular weight 470,000) 0.6 weight portion replaces the viscous modifier of non-alkali tackify type, prepares the coating fluid that final solid component concentration is 62 weight %; In addition, likewise obtain coated paper for printing with embodiment 1.The viscosity of coating fluid is 3667mPas, and rupture time is 2140ms.
［ comparative example 4 ］ (non-alkali tackify type viscosity improver)
In the preparation of the coating fluid of embodiment 1; Use the viscous modifier (trade name: SN THICKENER929S of non-alkali tackify type; SAN NOPCO corporate system, molecular weight 600,000) 0.4 weight portion, prepare the coating fluid that final solid component concentration is 54 weight %; In addition, likewise obtain coated paper for printing with embodiment 1.The viscosity of coating fluid is 821mPas, and rupture time is 574ms.
［ comparative example 5 ］
In the preparation of the coating fluid of embodiment 1, do not add the viscous modifier of non-alkali tackify type, prepare the coating fluid that final solid component concentration is 69 weight %, in addition, likewise obtain coated paper for printing with embodiment 1.The viscosity of coating fluid is 1100mPas, and rupture time is 68ms.
［ comparative example 6 ］
In the making of the coated paper of comparative example 5, use the bodystock paper that in embodiment 9, uses, in addition, likewise obtain coated paper for printing with comparative example 5.
［ comparative example 7 ］
The scraper apparatus for coating that uses coating fluid to supply with to fountain (jet-fountain) mode replaces curtain formula apparatus for coating, in addition, likewise obtains coated paper for printing with embodiment 6.
These results are shown in the table.Can know by table,, can obtain that pitfall takes place less and paper is used in blank sheet of paper quality and the excellent printing coating of press quality according to the present invention.
[table 2-1]
[table 2-2]
Claims (6)
1. the manufacturing approach of a coated paper for printing is led to body paper in the curtain type membrane of coating fluid and on body paper, is formed coating layer,
The rupture time of said coating fluid is more than the 500ms, and 30 ℃ Type B viscosity is 1000mPas～3000mPas, and,
Said coating fluid comprises viscous modifier, and it serves as that the main molecular weight that forms is the polymer more than 400,000 that this viscous modifier contains with the acrylic monomer unit.
2. the manufacturing approach of coated paper for printing as claimed in claim 1, wherein, said viscous modifier is the viscous modifier of alkali tackify type.
3. the manufacturing approach of coated paper for printing as claimed in claim 1, wherein, said viscous modifier is the viscous modifier of non-alkali tackify type.
4. like each described manufacturing approach in the claim 1～3, wherein, it is the pigment below 2.0 that said coating fluid contains flat ratio, and said flat ratio is represented with following formula:
The specific area that flat ratio=use BET method is obtained/suppose that by laser diffraction formula size distribution particle is the specific area that desirable spheroid is obtained.
5. one kind is used for coated paper for printing is carried out the coating fluid that the curtain formula is coated with, and wherein, the rupture time of coating fluid is more than the 500ms, and 30 ℃ Type B viscosity is 1000mPas～3000mPas, and,
Said coating fluid comprises viscous modifier, and it serves as that the main molecular weight that forms is the polymer more than 400,000 that this viscous modifier contains with the acrylic monomer unit.
6. coated paper for printing adopts the coating of curtain formula that the described coating fluid of claim 5 is applied on the body paper and obtains.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-040032 | 2010-02-25 | ||
| JP2010040032 | 2010-02-25 | ||
| PCT/JP2011/054289 WO2011105552A1 (en) | 2010-02-25 | 2011-02-25 | Coated printing paper and process for producing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102782216A true CN102782216A (en) | 2012-11-14 |
| CN102782216B CN102782216B (en) | 2015-04-22 |
Family
ID=44506949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180010809.7A Expired - Fee Related CN102782216B (en) | 2010-02-25 | 2011-02-25 | Coated printing paper and process for producing same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5694287B2 (en) |
| CN (1) | CN102782216B (en) |
| WO (1) | WO2011105552A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6116811B2 (en) * | 2012-03-28 | 2017-04-19 | 日本製紙株式会社 | Coated white paperboard and method for producing the same |
| JP2014198919A (en) * | 2013-03-29 | 2014-10-23 | 日本製紙株式会社 | Method of producing pigment-coated paper |
| JP6041755B2 (en) * | 2013-05-24 | 2016-12-14 | 北越紀州製紙株式会社 | Coated paper for printing |
| JP6212458B2 (en) * | 2014-09-24 | 2017-10-11 | 北越紀州製紙株式会社 | Inkjet printing paper |
| JP6212457B2 (en) * | 2014-09-24 | 2017-10-11 | 北越紀州製紙株式会社 | Inkjet printing paper |
| JP6284504B2 (en) * | 2015-06-29 | 2018-02-28 | 北越紀州製紙株式会社 | On-demand inkjet printing paper |
| JP6490543B2 (en) * | 2015-09-01 | 2019-03-27 | 北越コーポレーション株式会社 | Inkjet recording paper manufacturing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5447753A (en) * | 1991-06-07 | 1995-09-05 | Nippon Paper Industries Co., Ltd. | Method of manufacturing coated paper for printing |
| CN1526043A (en) * | 2001-04-14 | 2004-09-01 | Process for making multilayer coated paper or paperboard | |
| JP2005299068A (en) * | 2004-03-17 | 2005-10-27 | Oji Paper Co Ltd | Coated paper for printing and method for producing coated paper for printing |
| US20080248321A1 (en) * | 2004-09-17 | 2008-10-09 | Basf Aktiengesellsschaft | Method for the Production of Single-and/or Multiple-Coated Substrates |
-
2011
- 2011-02-25 JP JP2012501882A patent/JP5694287B2/en not_active Expired - Fee Related
- 2011-02-25 WO PCT/JP2011/054289 patent/WO2011105552A1/en active Application Filing
- 2011-02-25 CN CN201180010809.7A patent/CN102782216B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5447753A (en) * | 1991-06-07 | 1995-09-05 | Nippon Paper Industries Co., Ltd. | Method of manufacturing coated paper for printing |
| CN1526043A (en) * | 2001-04-14 | 2004-09-01 | Process for making multilayer coated paper or paperboard | |
| JP2005299068A (en) * | 2004-03-17 | 2005-10-27 | Oji Paper Co Ltd | Coated paper for printing and method for producing coated paper for printing |
| US20080248321A1 (en) * | 2004-09-17 | 2008-10-09 | Basf Aktiengesellsschaft | Method for the Production of Single-and/or Multiple-Coated Substrates |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2011105552A1 (en) | 2013-06-20 |
| WO2011105552A1 (en) | 2011-09-01 |
| JP5694287B2 (en) | 2015-04-01 |
| CN102782216B (en) | 2015-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102782216A (en) | Coated printing paper and process for producing same | |
| CN101680192B (en) | Paper coating compositions, coated papers, and methods | |
| CA2480825C (en) | Composition for surface treatment of paper | |
| TWI453320B (en) | Production method of coated base paper and coated paper | |
| EP1987195B1 (en) | Base paper and production thereof | |
| CN102877365A (en) | Manufacturing method of high-bulk coating printing paper | |
| US20140004340A1 (en) | Light and smooth coating for paper or board, or a paint coating, formed using a composite structure | |
| CN1878912B (en) | Cast coated paper and process for producing the same | |
| CN101063282B (en) | Process for making coated paper or paperboard | |
| JP2008527181A (en) | COATED PAPER PRODUCT AND METHOD AND APPARATUS FOR PRODUCING COATED PAPER PRODUCT | |
| CN103459721A (en) | Coated white paperboard and method for manufacturing same | |
| EP1937895B1 (en) | A photobase material | |
| EP2024563B1 (en) | Composition for improving the printability of coated paper | |
| JP5949168B2 (en) | Coated fancy paper | |
| US20130011553A1 (en) | Processes for preparing coated printing paper | |
| JP2007262639A (en) | Coated printing sheet | |
| CN100560866C (en) | The photogravure coated paper | |
| CN103459722A (en) | Coated paper for printing and method for manufacturing same | |
| CN104169496A (en) | Coated white paperboard and method for producing same | |
| JP2006233371A (en) | Coated paper and method for producing the same | |
| JPH09158085A (en) | Production of coated paper for offset printing and coated paper | |
| JP2011021286A (en) | Method for forming wet double coating layer and coated paper for printing using the same | |
| JP2004162198A (en) | Gloss lightweight coated paper for rotary offset printing | |
| JP5135855B2 (en) | Method for producing coated paper for printing | |
| JP4566598B2 (en) | Cast coated paper and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20180225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |