CN102782216B - Coated printing paper and process for producing same - Google Patents
Coated printing paper and process for producing same Download PDFInfo
- Publication number
- CN102782216B CN102782216B CN201180010809.7A CN201180010809A CN102782216B CN 102782216 B CN102782216 B CN 102782216B CN 201180010809 A CN201180010809 A CN 201180010809A CN 102782216 B CN102782216 B CN 102782216B
- Authority
- CN
- China
- Prior art keywords
- coating
- coating fluid
- printing
- coated paper
- 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.)
- Expired - Fee Related
Links
- 238000007639 printing Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000008569 process Effects 0.000 title abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 235
- 239000011248 coating agent Substances 0.000 claims abstract description 219
- 239000012530 fluid Substances 0.000 claims abstract description 140
- 229920000642 polymer Polymers 0.000 claims abstract description 26
- 239000011247 coating layer Substances 0.000 claims abstract description 21
- 239000000178 monomer Substances 0.000 claims abstract description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003607 modifier Substances 0.000 claims description 63
- 239000000049 pigment Substances 0.000 claims description 57
- 239000003513 alkali Substances 0.000 claims description 43
- 230000008719 thickening Effects 0.000 claims description 40
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 27
- 238000004519 manufacturing process Methods 0.000 claims description 21
- 239000012528 membrane Substances 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 15
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 10
- 238000009826 distribution Methods 0.000 claims description 10
- 238000004438 BET method Methods 0.000 claims description 7
- 229940088417 precipitated calcium carbonate Drugs 0.000 claims description 7
- 229910021532 Calcite Inorganic materials 0.000 claims description 3
- 238000002425 crystallisation Methods 0.000 claims description 3
- 230000008025 crystallization Effects 0.000 claims description 3
- 238000007766 curtain coating Methods 0.000 abstract description 52
- 239000004034 viscosity adjusting agent Substances 0.000 abstract 1
- 239000000123 paper Substances 0.000 description 150
- 239000007787 solid Substances 0.000 description 24
- 229920002472 Starch Polymers 0.000 description 17
- 239000010410 layer Substances 0.000 description 17
- 235000019698 starch Nutrition 0.000 description 17
- 239000008107 starch Substances 0.000 description 17
- 239000007788 liquid Substances 0.000 description 15
- 239000007767 bonding agent Substances 0.000 description 13
- 239000000976 ink Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 8
- 241000276489 Merlangius merlangus Species 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 239000000839 emulsion Substances 0.000 description 6
- 239000004816 latex Substances 0.000 description 6
- 229920000126 latex Polymers 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
- 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
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000006266 etherification reaction Methods 0.000 description 4
- 238000003786 synthesis reaction Methods 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
- 238000009825 accumulation Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 3
- 238000009499 grossing Methods 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000000243 solution 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 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
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 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
- 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
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 239000011111 cardboard Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011156 evaluation 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
- 238000007561 laser diffraction method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 230000037230 mobility Effects 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
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000000790 scattering method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010345 tape casting Methods 0.000 description 2
- 241000345998 Calamus manan Species 0.000 description 1
- -1 Chloroalkyl Acrylates Chemical class 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
- 241000243251 Hydra Species 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
- 239000002174 Styrene-butadiene Substances 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
- 230000001154 acute effect Effects 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910021418 black silicon Inorganic materials 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 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
- 238000003490 calendering Methods 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
- 229920006184 cellulose methylcellulose 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
- 239000013530 defoamer Substances 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
- 239000004744 fabric Substances 0.000 description 1
- 238000005187 foaming Methods 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
- QRXWMOHMRWLFEY-UHFFFAOYSA-N isoniazide Chemical compound NNC(=O)C1=CC=NC=C1 QRXWMOHMRWLFEY-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- HTEAGOMAXMOFFS-UHFFFAOYSA-N methyl 2-methylprop-2-enoate;prop-2-enoic acid Chemical class OC(=O)C=C.COC(=O)C(C)=C HTEAGOMAXMOFFS-UHFFFAOYSA-N 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000000203 mixture Substances 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
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 235000012950 rattan cane Nutrition 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 238000007790 scraping Methods 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
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 235000019710 soybean protein Nutrition 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000011115 styrene butadiene 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
- 238000012546 transfer Methods 0.000 description 1
- 238000010023 transfer printing Methods 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
Landscapes
- Paper (AREA)
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 manufacture method of coated paper for printing and coated paper for printing, particularly relate to the manufacture method adopting curtain coating mode and the coated paper for printing that obtains and coated paper for printing.
Background technology
At present, in the manufacture of coated paper for printing, usually adopt the scraper type coating process and the roller coating method that belong to contact coating method.
As the feature 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 contact with body paper via coating, and therefore, the load putting on body paper increases, and the possibility that disconnected paper occurs is high.Coating speed this trend faster is larger, and the frequency of disconnected paper increases tremendously.In addition, the equipment come in contact during coating, scraper or roller are inevitably depleted, and need to carry out regular replacing as running stores.And in the coating method of contact, coating apparatus contacts with coating fluid always, therefore, easily on coating apparatus, adhere to dirt, its result, there will be the disadvantages such as coating defects occurs, therefore need regular cleaning.Like this, the problem that the operating efficiency that can there is contact coating method has the faster efficiency of the limit, particularly coating speed poorer.
In addition, as the feature of the quality aspect of contact coating method, following point is had.That is, scraper for coating be by coating solution after body paper, with scraper, the coating fluid of surplus is struck off and formed required coating weight levelling coating (smoothing coating), be the coating process of so-called rear metering method.Therefore, the flatness of coated face becomes good, but coating weight can be subject to the concavo-convex impact of body paper, therefore easily becomes the coated face of mottling.Time serious, coating fluid is scraped to owing to scraping body paper surface with scraper and is caused the degree that fiber exposes at body paper protuberance.Due to the deviation of such coating weight, the infiltration that can produce ink during printing is poor, because printing ink concentration is uneven, gloss uneven, can produces and be difficult to obtain good this problem of printing surface.On the other hand, roller coat cloth the coating measured on roller is in advance transferred to body paper to carry out coating process that be coated with, so-called front metering method.Therefore, there are the following problems: need to be expanded to equably on roller by the coating of aequum in advance, needs complicated device, operation.In addition, easily produce the pattern of muscle shape during coating, obtain and do not have the coated face of crawling to be very difficult, viscosity, the concentration of the coating fluid that can use are limited.In addition, when the roller of print-on coating liquid is mixed into foreign matter, the part not transferred with the coating fluid on roller on body paper likely can be produced.
Relative to contact coating method as above, there will be a known the contact-free applicator method such as curtain coating mode, spraying coating method.Curtain coating mode be formed coating fluid film and on this film logical body paper thus the coating method of coating layer is set on body paper, when being coated with, equipment does not contact completely with body paper.Therefore, in operation, disconnected paper during coating reduces, and also can not produce running stores.In addition, even if coating speed rises, also constant to the load of body paper, therefore, it is possible to carry out ultrahigh speed coating.In addition, curtain coating is the coating method of front metering, and the coating fallen all transfers to body paper.Therefore, the management of coating weight is easy, just can be obtained the coated paper of required coating weight by management concentration, flow.On the other hand, in quality, by forming the curtain type membrane of uniform coating, the coating weight of width, flow direction becomes even.In addition, owing to being noncontact, so coating can not be carried out transfer printing with being pressed into body paper, the coating layer of uniform thickness can be obtained, the coating property of body paper is also become good.Like this, owing to adopting curtain coating mode can obtain uniform coating layer, so when printing, there is advantages such as not easily producing the pit that causes because absorption of inks is uneven.And then gas permeability also becomes good, so resistance to foaming characteristic (Block リ ス タ ー Fitness) improves.
As mentioned above, curtain coating mode is very excellent rubbing method, proposes the application in pressure-sensitive carbon paper (patent document 1), heat-sensitive paper (patent document 2), cardboard coating wax etc.
In addition, also proposed the scheme common printed coated paper being imported to curtain coating mode.Such as, add the auxiliary agent such as tackifier to be stretched also the coating of the not proterties (stringiness) of easy fracture even if also proposed to use, reduce the manufacture method (patent document 3) of the coated paper for printing that pitfall (crater) produces.But by adding specific tackifier, although the stringiness of coating can be made to a certain extent to improve, viscosity rises sometimes, and the deaeration of coating can be deteriorated.
In addition, propose the method (patent document 4) of the high body paper of use flatness, because the flatness of body paper is high, so the coating that the wiring that body paper and curtain type membrane touch can be called as swingboat ripple (パ De リ Application グ) accumulates, easily produce coating defects (non-patent literature 1).In addition, carry out the processing such as calendering process to improve the flatness of body paper, the qualities such as therefore density rises, opacity reduction reduce.
Prior art document
Patent document
Patent document 1: JP 54-85811 publication
Patent document 2: JP 54-74761 publication
Patent document 3: Unexamined Patent 6-294099 publication
Patent document 4: Unexamined Patent 5-247890 publication
Non-patent literature
Non-patent literature 1: her rattan one acute hearing waits " adopting the research of the pigment coated paper of high speed curtain coating ", the 70th paper pulp research presentations main idea collection, 130 ~ 133 pages, in September, 2003
Summary of the invention
As mentioned above, import curtain coating mode to common printed coated paper and there is Railway Project, require the good workability of harmless curtain coating, also can stably manufacture when manufacturing with higher speed the method for the common printed coated paper of high-quality.
Even if problem of the present invention is to provide one high-speed coating and also not easily produces small uncoated portion (hereinafter also referred to " pitfall "), curtain coating can be adopted to manufacture the technology of the coated paper for printing of blank sheet of paper quality and press quality excellence efficiently.
From the view point of quality, drying energy, coating speed, the coating fluid for common coated paper for printing cannot reduce concentration, viscosity.Such as, the general viscosity of coating of the chromonic layer of heat-sensitive paper, pressure-sensitive carbon paper is about 100 ~ 400mPas, on the other hand, manufactures coating fluid during common coated paper for printing, and viscosity is about 1000 ~ 4000mPas.If directly used as the coating fluid of curtain coating by the full-bodied coating fluid of this common coated paper for printing, then curtain type membrane easily invades bubble, sometimes because bubble causes uncoated portion to present pockmarks shape at coated face.
In addition, if the difference of the speed of fall of curtain type membrane adopting coating fluid to be formed and the gait of march (coating speed) of body paper is large, then small uncoated portion (pitfall) is sometimes produced.As the main cause of pitfall, can enumerate the difference due to the speed of fall of curtain type membrane and the gait of march of body paper, stretch coating fluid at direct of travel with the speed of several times, therefore, curtain type membrane has just contacted with body paper and has just ruptured.And, this bubble trace is stretched due to the speed of fall of curtain type membrane and the differing from of gait of march (coating speed) of body paper, become the several times length of the size of the bubble produced originally, so king-sized problem can be become when carrying out high-speed coating as common printed coated paper.As other main causes producing pitfall, can enumerate the flatness of body paper coarse time, no matter whether body paper advances at a high speed, all can there is gap between body paper and coating fluid in the coating of coating fluid, time dry because coated film is shunk or the air in gap expands coating fluid by film rupture, coated film produces pitfall.
In addition, also there are the following problems: the flowing of the air of movement owing to advancing along with body paper, and the curtain type membrane of coating fluid is disorderly, and then forms coating defects.Coating speed is faster, and this problem is more obvious.
The present inventor is studied from the aspect of coating fluid formula repeatedly to the workability of curtain coating and quality, found that: in the pitfall caused at the speed of fall of curtain type membrane eliminated owing to being formed by coating fluid and the differing from of gait of march (coating speed) of body paper, the aqueous character of coating fluid is important.
Particularly the present inventor finds: have the coating fluid of specific fracture characteristics and viscosity by using, curtain coating can be adopted to manufacture efficiently coated paper for printing that pitfall produces the high-quality be inhibited, thus completes the present invention.
But be not limited thereto, the present invention contains following invention (1) ~ (3).
(1) a kind of manufacture method of coated paper for printing, body paper is led to the curtain type membrane in coating fluid and on body paper, forms coating layer, the rupture time of described coating fluid is more than 500ms, the Type B viscosity of 30 DEG C is 1000mPas ~ 3000mPas, and, described coating fluid comprises viscous modifier, and it is the polymer of more than 400,000 that this viscous modifier contains the molecular weight formed based on acrylic monomer unit.Described viscous modifier is preferably alkali thickening type or non-alkali thickening type.In addition, it is the pigment of less than 2.0 that described coating fluid preferably contains flat ratio, and described flat ratio following formula represents:
The specific area of flat ratio=obtain by BET method/suppose that particle is the specific area that desirable spheroid is obtained by laser diffraction formula size distribution.
(2) a kind of coating fluid for carrying out curtain coating to coated paper for printing, wherein, the rupture time of coating fluid is more than 500ms, the Type B viscosity of 30 DEG C is 1000mPas ~ 3000mPas, and, described coating fluid contains viscous modifier, and it be the main molecular weight formed is the polymer of more than 400,000 that this viscous modifier contains by acrylic monomer unit.
(3) coated paper for printing, adopts curtain coating to obtain on described coating solution to body paper.
According to the present invention, even curtain coating can be adopted to manufacture high-speed coating efficiently also not easily produce all excellent coated paper for printing of small uncoated portion (pitfall), blank sheet of paper quality and press quality.
Detailed description of the invention
［ coating fluid ］
The rupture time of the coating fluid used in the present invention is more than 500ms, and the Type B viscosity of 30 DEG C is 1000 ~ 3000mPas.By using the curtain coating liquid with this characteristic, the generation of pitfall particularly during high-speed coating, also can be suppressed.
The rupture time of so-called coating fluid in the present invention is the value of the stretching easiness (stringiness) representing coating fluid.This value is larger, will become the coating fluid that stringiness is higher.Rupture time in the present invention is obtained in the following way, namely, 1) coating fluid that liquid temperature is 30 DEG C is enclosed being configured to (spacing 3mm) between the circular slab that coaxial with viscosimeter and that axle is vertical a pair diameter is 8mm, 2) plate of top is vertically drawn high 6mm with the speed of 300mm/ second and keeps this state, 3) measure and draw high the time of start time to coating fluid fibril ruptures from described plate.Time before fibril ruptures preferably uses laser determination, preferred about the 2ms of temporal resolution now.The example that can carry out the device of this mensuration comprises the elongation viscosity meter (machine name: CaBER1) of Thermo Haake Inc..
If the rupture time of coating fluid is shorter than 500ms, then due to the difference of the speed of fall of curtain type membrane that formed by coating fluid and the gait of march (coating speed) of body paper, coating fluid cannot follow the elongation occurred instantaneously when curtain type membrane contacts with body paper, and curtain type membrane ruptures and produces the small uncoated portion of pitfall shape.That is, preferred coating speed is faster, and the stringiness of coating fluid is also higher.
Therefore, the rupture time of the coating fluid used when manufacturing coated paper for printing is more long more preferred, more preferably more than 500ms, further preferred more than 700ms.
But, even if rupture time is more than 500ms, if but coating fluid the Type B viscosity of 30 DEG C more than 3000mPas, then the deaeration of coating fluid is deteriorated, and then the stability of curtain type membrane reduces, and, perforate because bubble causes can be generated at coating layer, produce pitfall, therefore, the quality of coated paper is significantly deteriorated.In addition, if the described Type B viscosity of coating fluid is more than 3000mPas, then the liquor charging of coating fluid becomes difficult, is therefore not suitable for.In addition, if described Type B viscosity is lower than 1000mPas, then exists and be difficult to maintenance stringiness, the quality variation of coated paper, the trend of workability variation.In the present invention, the Type B viscosity of coating fluid preferably uses the rotor of No.4, measures with the rotary speed of 60rpm.
In order to prepare in the present invention the coating fluid with above-mentioned characteristic, preferably viscous modifier can be used.The viscous modifier used in so-called the present invention has the medicament to the effect that the mobility of coating fluid adjusts, by the coating fluid coordinating viscous modifier easily can prepare the rupture time with more than 500ms.
The rupture time of the coating fluid used in the present invention, the characteristic of viscosity mainly can be adjusted by the addition of viscous modifier, if viscosity adjustment a little, then also can be adjusted by the solid component concentration improving coating fluid.This is because by improving solid component concentration, the pigment particles easily in generation coating fluid and the interaction between other complexs, can extend the rupture time of coating fluid.
Viscous modifier of the present invention, owing to giving the viscosity of not too high appropriateness to curtain coating liquid, so can improve the solid component concentration of coating fluid, can also improve the press quality of coated paper.In this case, the solid component concentration of coating fluid is not particularly limited, and preferably more than 60 % by weight, more preferably more than 63 % by weight.The upper limit of solid component concentration is also not particularly limited, if consider liquor charging etc., then and preferably less than 75 % by weight, more preferably less than 70 % by weight.
［ viscous modifier ］
As the viscous modifier used in the present invention, the molecular weight can enumerated containing the formation based on acrylic monomer unit is the viscous modifier of the polymer of more than 400,000.The so-called polymer formed based on acrylic monomer unit, refers to the polymer formed by the acrylic monomer unit of more than 50 % by weight.Residual monomer unit in polymer can be known monomeric unit.
As this viscous modifier, the viscous modifier of alkali thickening type or non-alkali thickening type can be enumerated.The viscous modifier of so-called alkali thickening type, to refer in the aqueous solution of viscous modifier or be scattered at viscous modifier and add arbitrary alkali in the dispersion liquid in water and make the pH of aforesaid liquid be after alkaline range, the viscous modifier that the viscosity of aforesaid liquid rises.Polymer contained in the viscous modifier of alkali thickening type can be water-soluble, or also can disperse in water and form emulsion.But the viscous modifier of alkali thickening type is preferably the emulsion of polymer dispersed in water, the micella of the polymer in above-mentioned emulsion destroys, becomes full-bodied liquid by adding alkali by this emulsion.
Like this, the viscous modifier of alkali thickening type has the effect that the viscosity of coating fluid entirety is increased.And, the viscous modifier of alkali thickening type also has following effect: after thickening (micella destroy after) viscous modifier in the polymer (polymer) that exists be adsorbed onto coordinate in coating fluid pigment, latex particle forms tridimensional network, thus to coating fluid imparting mechanism viscosity.
The coating fluid used in the manufacture of coated paper for printing, in general, pH meta-alkali side, therefore, if use the viscous modifier of alkali thickening type, then can improve the rupture time of coating fluid, Type B viscosity effectively.In addition, the molecular weight of the polymer in viscous modifier is larger, make the rupture time of coating fluid, Type B viscosity, particularly stringiness increase effect higher, therefore, the molecular weight of the polymer in the viscous modifier used in the present invention is more than 400,000.But the too high then viscosity meeting of coating fluid sometimes of molecular weight is excessively risen, and therefore the molecular weight of preferred above-mentioned polymer is less than 4,000,000.In the present invention, the molecular weight of polymer refers to and in gel permeation chromatography, is converted into polystyrene and the weight average molecular weight of trying to achieve.
The addition of the viscous modifier of alkali thickening type is preferably 0.1 ~ 1.0 weight portion relative to the pigment total solid composition in coating fluid, more preferably 0.1 ~ 0.5 weight portion.If addition is less than 0.1 weight portion, then cannot give enough rupture times to coating fluid, if added more than 1.0 weight portions, then the viscosity of coating fluid rises, and the deaeration of coating fluid significantly reduces.
On the other hand, the viscous modifier of so-called non-alkali thickening type, to refer in the aqueous solution of viscous modifier or viscous modifier be scattered in add arbitrary alkali in the dispersion liquid of water and make the pH of aforesaid liquid be alkaline range time, the viscous modifier that the viscosity of aforesaid liquid increases hardly.
With regard to the viscous modifier of this non-alkali thickening type, even if preferably add alkali in the aqueous solution of polymer or in the emulsion of polymer dispersed in water, also there is not chemical change etc. in polymer.As non-alkali thickening type viscous modifier contained by polymer, preferably enumerate to pH stable, the polycarboxylate that formed by acrylic monomer unit is main polymer.This polymer can be water-soluble, also can be dispersed in water formation emulsion.
The molecular weight of above-mentioned polymer is higher, and the viscosity under shearing force reduces less, and therefore, the effect of coating fluid being given to stringiness is higher.Therefore, the molecular weight of the polymer contained by viscous modifier of non-alkali thickening type is more than 400,000, preferably more than 800,000.But the viscosity raising coating fluid due to molecular weight also rises, and therefore the molecular weight of preferred above-mentioned polymer is less than 4,000,000.
As mentioned above, the viscous modifier of alkali thickening type is neutralized and thickening at alkaline range.Therefore in the system that there is free metal ion, system not easily becomes alkalescence, and Efficient Adhesive Promotion is not remarkable sometimes, and particularly high concentration is combined with the coating fluid of calcium carbonate, and Efficient Adhesive Promotion is not remarkable sometimes.On the other hand, for the viscous modifier of non-alkali thickening type, even there is the system of free metal ion, Efficient Adhesive Promotion does not also change, even the coating fluid that therefore high concentration is combined with calcium carbonate also can give stringiness effectively.
Also the viscous modifier that can be used together the natural polysaecharides such as starch, CMC system in the present invention, as viscous modifier, can adjust the mobility of coating fluid by adding various starch.As the starch used in the present invention, be not particularly limited, can use such as with the starch that edible tapioca starch, corn etc. are raw material.Wherein, the effect that the acetylated starch being raw material with edible tapioca starch gives stringiness is high, is preferred.
［ pigment ］
In the present invention, the coating fluid of supply curtain coating contains pigment.The pigment coordinated in coating fluid does not limit, and can use all the time for the pigment of coated paper purposes.Such as, can use the organic pigment such as inorganic pigment, plastic pigment, the Organic-inorganic composite pigment etc. such as kaolin, clay, powdered whiting, precipitated calcium carbonate, titanium dioxide, barium sulfate, calcium sulfate, zinc oxide, silicic acid, silicate, cataloid, satin white, these pigment can be used alone or used in combination by more than two kinds as required.
In the present invention, on this aspect of deaeration of coated paper quality, coating fluid, compared with the pigment with plate-like shape, in coating fluid, preferably coordinate the pigment close to spherical shape.Specifically, the preferred specific area that adopts BET method to obtain of using is divided by being supposed that by the size distribution adopting laser diffraction formula to measure particle be the value (flat ratio) that specific area that desirable spheroid calculates obtain is the pigment of less than 2.0, and more preferably use flat ratio is the pigment of less than 1.5.Flat ratio can represent with following formula.
Flat ratio=employing BET method obtain specific area/by laser diffraction formula size distribution suppose particle be the specific area that desirable spheroid calculates
The numerical value of flat ratio is higher, and the flatness of pigment is higher, and the numerical value of flat ratio, more close to 1, means that pigment is more close to desirable spheroid.If use flat ratio to be the pigment of less than 2.0, although then coated paper quality becomes good detailed reason and clearly do not limit, following reason can be thought of as.With regard to the curtain coating of contact-free applicator mode, think compared with contact coating method, there is when using flat pigment the trend that pigment is difficult to carry out at the direct of travel of body paper orientation, use flat pigment if a large amount of, then pigment cannot orientation regularly, and the flatness on coated paper surface reduces, in addition, the space of coating layer is increased, then the infiltration aggravation of ink when printing, print gloss can reduce.
In addition, if use flat ratio to be the pigment of less than 2.0, then the deaeration of coating fluid improves, and the generation of pitfall is also inhibited.That is, if use the flat pigment of flat ratio more than 2.0, then during deaeration, the mobile of bubble can be hindered therefore deaeration easily to reduce by flat pigment, on the other hand, if use flat ratio is the torulose pigment of less than 2.0, then not easily hinder the movement of bubble, deaeration is difficult to reduce.
In addition, in the present invention, as pigment, be the calcium carbonate obtained by the precipitated calcium carbonate of fusiform calcite crystallization is carried out case of wet attrition, preferably use that the average grain diameter (d50: the particle diameter of accumulation 50 % by weight) measured by X-ray transmission formula particle size distribution device is 0.1 ~ 0.5 μm, BET specific surface area is 10 ~ 30m
2the scope of/g, the sharpness of the size distribution represented with following formula measured with X-ray transmission formula particle size distribution device are the calcium carbonate of more than 50.If use this calcium carbonate as pigment, then can obtain the coated paper for printing of ink bleed excellence.
Sharpness=(d30/d70) × 100
［ in formula, d30 is the particle diameter of accumulation 30 % by weight, and d70 is the particle diameter of accumulation 70 % by weight ］
In addition, when using above-mentioned calcium carbonate in the present invention, as the precipitated calcium carbonate before pulverizing, preferably use fusoid primary particle aggegation and form the offspring of rose (ロ ゼ ッ タ) shape and the calcite crystallization that obtains.Now, the average grain diameter (d50) that the precipitated calcium carbonate X-ray transmission formula particle size distribution device before more preferably pulverizing measures is 1.4 ~ 3.0 μm, BET specific surface area is 4 ~ 12m
2/ g.And then, when using above-mentioned calcium carbonate in the present invention, preferably use multi-pass type pulverizer to carry out case of wet attrition.Through the calcium carbonate of this pulverizing use level preferably every 100 weight portion pigment be 40 ~ 100 weight portions, more preferably 60 ~ 90 weight portions.
［ bonding agent ］
In the present invention, preferably in curtain coating liquid, bonding agent (binding agent) is coordinated.The bonding agent used is not particularly limited, can uses all the time for the bonding agent of coated paper purposes.Such as, more than in following bonding agent a kind can be suitably selected to use, that is, the synthesis of various copolymer and polyvinyl alcohol, copolymer-maleic anhydride, the acrylic acid-methacrylic acid methyl esters based copolymer etc. such as styrene-butadiene system, Styrene And Chloroalkyl Acrylates system, ethane-acetic acid ethyenyl ester system, butadiene-methyl methacrylate system, vinyl acetate-acrylic butyl ester system is bonding agent; Casein, soybean protein, synthetic proteins etc. are protein-based; The starch based such as etherification starch, dextrin such as oxidized starch, positive starch, urea organic phosphate starch, ethoxy etherification starch; The coated paper bonding agent that the cellulose derivatives such as carboxymethyl cellulose, hydroxyethylcellulose, Carboxymethyl Cellulose etc. are common.In these bonding agents, the polyvinyl alcohol of low polymerization degree (degree of polymerization is about 500) significantly improves adhesive effect with rising owing to can not make viscosity, therefore preferably.
These bonding agents preferably every 100 weight portion pigment are 5 ~ 50 weight portions, use in the scope more preferably about 8 ~ 30 weight portions.
In addition, as described later, curtain coating layer can be made in the present invention to form multilayer.Particularly when being set to by curtain coating layer near the orlop of body paper, intermediate layer and the distance body paper the superiors these three layers farthest, the weight ratio of the bonding agent of preferred each layer is 1:0.5 ~ 0.8:0.7 ~ 1.0.By being set to such cooperation, the amount of used bonding agent can be reduced, can manufacturing cost be reduced.
［ other ］
In the present invention, the various auxiliary agents that dispersant, tackifier, water retention agent, defoamer, resistance to hydrated agent, colouring agent, surfactant etc. coordinate usually in coated paper pigment can also suitably be used as required.
［ body paper ］
The body paper used in the present invention is not particularly limited, and can use the general fine paper, intermediate paper, coarse paper, machine-coated paper, art paper, cast-coated paper, synthetic paper, resin coated paper, plastic film etc. that use bar none.
In addition, even if the flatness of body paper is low in the present invention also play required effect, therefore also can use the body paper that flatness is low, in the scope that the coating not being called as swingboat ripple accumulates, the body paper that flatness is high can be used when curtain coating.In addition, as the method for flatness improving body paper, process is effective before curtain coating, to carry out that precompressed is prolonged etc.
And the body paper that as the method improving body paper flatness, to be coated with in advance before can being used in curtain coating with starch be the clear dope of principal component, the coating containing pigment obtains.In addition, about the pre-coating before curtain coating, the state of carrying out the body paper after curtain coating etc., pre-coating under the state of the material wets of drying process directly on body paper can be used bar none.
［ curtain coating layer ］
In the present invention, as long as more than 1 layer, curtain coating layer.When curtain coating layer is multilayer, the coating fluid with specific fracture characteristics and viscosity characteristics in the present invention, may be used for random layer, may be used for more than one deck, coating fluid preferably as the undermost coating fluid connected with body paper or the superiors uses, and most preferably uses as the undermost coating fluid connected with body paper.
［ curtain coating ］
So-called curtain coating in the present invention, be coating fluid is flowed down with curtain shape and form film and on this film logical body paper thus the coating method of coating layer is set on body paper.Curtain coating is the profile coating forming coating layer along body paper, in addition, owing to being so-called front metering method, therefore has the feature easily controlling coating weight.
In the present invention, coated paper manufactures by adopting curtain coating to carry out single or multiple lift coating on the two sides of body paper or one side.When carrying out multi-layer coated, also the coating process except curtain coating can be adopted in the coating of any layer, such as, can after employing curtain coating device carries out the coating of pigment application liquid, adopt knife coating apparatus to carry out the coating of pigment application liquid, or carry out curtain coating after carrying out scraper for coating.
In curtain coating, wet pressing wet (wet-on-wet) coating carrying out upper strata coating when moist lower floor's coating part can be carried out.Particularly as previously mentioned, when arranging three layers by curtain coating, the match ratio preferably making the bonding agent of each layer as previously mentioned, coating orlop after, in moist undermost situation, form intermediate layer, and form the superiors when moist intermediate layer.If form three layers in this wise, then can form good curtain coating film while reduction bonding agent use level.
The every one side of coating weight of the coating layer in the present invention counts 3 ~ 30g/m with dry weight
2suitable.Coating weight is less than 3g/m
2time, owing to cannot fully cover the concavo-convex of paper base material surface, so the acceptance of printing-ink significantly reduces sometimes.On the other hand, if the coating weight of a layer is more than 30g/m
2, then the workability such as drying property variation when being coated with reduces, or becomes binding agent migration and cause printing uneven reason, therefore not preferred.When coating layer is made up of multilayer, also preferably the coating weight of every one side is 30g/m
2below.
In addition, when carrying out curtain coating in the present invention, the known device used in curtain coating can be used.Such as, for carrying the pump of coating fluid, for carrying out degassed defoaming device etc. to coating fluid.
In the present invention, coated paper manufactures through common drying process after passing through to arrange coating layer on body paper, can as required by smoothingization process such as surface treatment procedures.In preferred embodiment, coated paper is dried be processed into manufacture after coated paper moisture be 3 ~ 10 % by weight, be more preferably 4 ~ 8 about % by weight.
And during smoothingization process, the smoothing techniques device such as common supercalender, gloss calender, soft press-polishing machine, hot pressing ray machine, shoe calender (shoe calender) can be used.Smoothing techniques device with on machine or the mode of off line suitably use, also suitably the form of adjustment pressue device, press fixture number, heat.
In the present invention, the coating speed of curtain coating can be arbitrary speed, is set to and just can plays more excellent effect in less than 1000m/ minute, therefore preferably.
The manufacture method of coated paper for printing of the present invention can be applied to the cardboards such as white board.
Embodiment
Below, enumerate embodiment and specifically describe the present invention, but the invention is not restricted to following example.In addition, unless otherwise specified, number range comprises its end points in this manual.
< evaluation method >
(1) rupture time: for Thermo Haake Inc. elongation viscosity meter (machine name: CaBER1), between the circular slab being configured to coaxial and a pair diameter 8mm that axle is vertical, (spacing 3mm) encloses the coating fluid that liquid temperature is 30 DEG C, the plate of top is vertically drawn high 6mm with the speed of 300mm/ second and keeps this state, measure the time to the fracture of coating fluid fibril from above-mentioned plate draws high, as rupture time.
(2) Type B viscosity: adopt Tokyo Keiki Inc. Brookfield viscometer, 30 DEG C, the rotor of use No.4,60rpm condition under measure.
(3) flat ratio: ultrasonic wave dispersion treatment is carried out to the pigment slurry that solid component concentration is 8 % by weight, measures for pigment.Be that the value that specific area that desirable spheroid calculates obtains is defined as flat ratio by the value of the specific area adopting BET method to obtain divided by the size distribution supposition particle by the pigment adopting laser diffraction and scattering method (using Malvern Mastersizer to measure) to measure.The specific area that the specific area of the reality adopting BET method to obtain more is greater than employing laser diffraction and scattering method mensuration particle is assumed to desirable spheroid and calculates, represent the shape more different from spheroid, therefore, the numerical value of above-mentioned flat ratio is higher, the flatness of pigment is higher, close to 1, the numerical value of flat ratio more means that pigment is close to desirable spheroid.
The supposition particle of the specific area of flat ratio=obtain by BET method/calculated by laser diffraction formula size distribution is the specific area that desirable spheroid calculates
The flat ratio of the various pigment obtained by the method is shown in the following table.
[table 1]
Table 1
(4) deaeration: during curtain coating, the state of the curtain type membrane adopting coating fluid to be formed by viewed in transmitted light, carries out visual valuation.Metewand is as follows.
◎: do not have bubble, zero completely: almost do not have bubble, △: residual a little bubble, ×: residual bubble in a large number
(5) degree that produces of pitfall (micro-uncoated portion): dip coated paper in the aqueous solution containing ammonium chloride 2.5 % by weight, isopropyl alcohol 47.5 % by weight, make its air dry after solution by rag wiping surplus, be encased in the drying machine being heated to 200 DEG C and make it burn 30 minutes.Then, adopt image analysis apparatus, the ratio of the body paper (paper pulp fiber) of the coating layer remained by white and black silicon carbide confirms to judge whether to possess the quality as coated paper for printing by the situation occurred of pitfall.In addition, the defect due to the bubble of coating fluid on the long ellipse extended of machine direct of travel is not very among covering rate.Evaluate and undertaken by visual, its benchmark is as follows.
◎: do not have pitfall, zero completely: almost do not have pitfall, △: pitfall is few, ×: pitfall is many
(6) smoothness (PPS): according to ISO 8791, measures the smoothness of coated paper under the condition of Hard Roll lining, 1000kPa.
(7) press quality (pit): adopt ROLAND company offset lithographic printing press (4 look), make offscreen to use ink (Toyo Ink HY Unity M), after printing with print speed printing speed 8000/hour, adopt pit (attached wall is uneven) situation during following benchmark visual valuation halftoning.
◎: very good, zero: good, △: slightly poor, ×: poor
(8) printing surface sense (print gloss, printing surface sense): adopt ROLAND company offset lithographic printing press (4 look), make offscreen to use ink (Toyo Ink HY Unity M), after printing with print speed printing speed 8000/hour, comprehensively in the print gloss ink attached wall printing surface sense in portion on the spot, following benchmark is adopted to carry out visual valuation.
◎: very good, zero: good, △: slightly poor, ×: poor
(9) intensity (print face glossiness) is printed: adopt ROLAND company offset lithographic printing press (2 look), make offscreen to use ink (Toyo Ink HY Unity Y), after printing with print speed printing speed 8000/hour, adopt fuzzing (picking) situation in following benchmark evaluation portion on the spot.
◎: do not have fuzzing, zero completely: almost do not have fuzzing, △: slightly fuzzing, ×: fuzzing is many
［ embodiment 1 ］
(preparation of coating fluid)
As pigment, preparation is 1.0 μm by average grain diameter, flat ratio is the powdered whiting (trade name: FMT-97 of 1.0, FIMATEC Inc.) after the pigment slurry that formed, relative to pigment 100 weight portion, add styrene butadiene copolymers latex (trade name: PA7082, A & L Inc. of Japan) 12 weight portions, viscous modifier (the trade name: SNTHICKENER 929S of non-alkali thickening type, SAN NOPCO Inc., molecular weight 600,000) 0.1 weight portion, surfactant (trade name: Newcol2308LY, emulsifying agent Inc. of Japan) 0.2 weight portion, suitable printing improving agent (trade name: SPI-106N, SUMIKA CHEMTEX Inc.) after 0.25 weight portion, prepare the coating fluid that solid component concentration is 66 % by 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 every one side 12g/m
2the mode of coating weight adopt curtain coating device 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 is set to 1200m/ minute, in addition, obtains coated paper for printing similarly to Example 1.
［ embodiment 3 ］
The cooperation number of viscous modifier is set to 0.2 weight portion, prepares the coating fluid that final solid component concentration is 58 % by weight, in addition, obtain coated paper for printing similarly to Example 1.The viscosity of coating fluid is 1019mPas, and rupture time is 1593ms.
［ embodiment 4 ］
Use acetyloxide helping digestion tapioca (trade name: Genesize80; GSL Inc.) 2 weight portions, alkali thickening type viscous modifier (trade name: SOMAREX270; SOMAR Inc.; molecular weight 950,000) 0.2 weight portion replaces viscous modifier 0.1 weight portion of non-alkali thickening type; prepare the coating fluid that final solid component concentration is 64 % by weight; in addition, coated paper for printing is obtained similarly to Example 1.The viscosity of coating fluid is 1330mPas, and rupture time is 737ms.
［ embodiment 5 ］
Coating speed is set to 1200m/ minute, in addition, obtains coated paper for printing similarly to Example 4.
［ embodiment 6 ］
Use the viscous modifier (trade name: SN THICKENER641 of alkali thickening type, SANNOPCO Inc., molecular weight 470,000) 0.1 weight portion replaces viscous modifier 0.1 weight portion of non-alkali thickening type, prepare the coating fluid that final solid component concentration is 66 % by weight, in addition, coated paper for printing is obtained similarly to Example 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 thickening type, SANNOPCO Inc., molecular weight 470,000) 0.2 weight portion replaces the viscous modifier of non-alkali thickening type, prepare the coating fluid that final solid component concentration is 62 % by weight, in addition, coated paper for printing is obtained similarly to Example 1.The viscosity of coating fluid is 1300mPas, and rupture time is 1495ms.
［ embodiment 8 ］
Coating speed is set to 1200m/ minute, in addition, obtains coated paper for printing similarly to Example 7.
［ embodiment 9 ］
In the manufacture of the coated paper of embodiment 6, senior body paper uses coating fluid lock roll coater with 9g/m
2body paper (the grammes per square metre 80g/m that (two sides) is carried out primary coat and obtained
2), described coating fluid is hydroxide precipitated calcium carbonate 100 weight portion, the urea organic phosphate starch (trade name: PLV500 of 1.2 μm by the average grain diameter as pigment, three and Starch Company's system) 17.5 weight portions, styrene butadiene copolymers latex (trade name: SL-14, Nippon Paper chemical company system) 6.5 weight portion compositions, in addition, coated paper for printing is obtained similarly to Example 6.Above-mentioned hydroxide precipitated calcium carbonate manufactures according to conventional methods.
［ embodiment 10 ］
Use the viscous modifier (trade name: SN THICKENER641 of alkali thickening type, SANNOPCO Inc., molecular weight 470,000) 0.4 weight portion replaces the viscous modifier of non-alkali thickening type, prepare the coating fluid that final solid component concentration is 54 % by weight, in addition, coated paper for printing is obtained similarly to Example 1.The viscosity of coating fluid is 1021mPas, and rupture time is 574ms.
［ embodiment 11 ］
Use the particulate kaolin (trade name: HydraGloss that average grain diameter is 0.2 μm, flat ratio is 0.8, KaMin Inc.) replace powdered whiting as pigment, prepare the coating fluid that final solid component concentration is 68 % by weight, in addition, coated paper for printing is obtained similarly to Example 6.The viscosity of coating fluid is 2430mPas, and rupture time is 580ms.
［ embodiment 12 ］
Use the powdered whiting (trade name: FMT-97 that average grain diameter is 1.0 μm, flat ratio is 1.0, FIMATEC Inc.) 50 weight portions and average grain diameter are 0.2 μm, flat ratio is 0.8 particulate kaolin (trade name: Hydra Gloss, KaMin Inc.) 50 weight portions are as pigment, prepare the coating fluid that final solid component concentration is 67 % by weight, in addition, coated paper for printing is obtained similarly to Example 6.The viscosity of coating fluid is 2090mPas, and rupture time is 510ms.
［ embodiment 13 ］
Use the engineered kaolin (trade name: CAPIM DG that average grain diameter is 2.6 μm, flat ratio is 2.9, Imerys Inc.) replace powdered whiting as pigment, prepare the coating fluid that final solid component concentration is 67 % by weight, in addition, coated paper for printing is obtained similarly to Example 6.The viscosity of coating fluid is 1114mPas, and rupture time is 720ms.
［ embodiment 14 ］
Use average grain diameter be 1.0 μm, flat ratio be 1.0 powdered whiting (trade name: FMT-97, FIMATEC Inc.) 50 weight portions and average grain diameter be 2.6 μm, flat ratio be 2.9 engineered kaolin (trade name: CAPIMDG, Imerys Inc.) 50 weight portions are as pigment, prepare the coating fluid that final solid component concentration is 67 % by weight, in addition, coated paper for printing is obtained similarly to Example 6.The viscosity of coating fluid is 1250mPas, and rupture time is 620ms.
［ embodiment 15 ］ (there is the coated paper of three layers of curtain coating layer)
(preparation of coating fluid)
As pigment, preparation is by average grain diameter 1.0 μm, powdered whiting (the trade name: FMT-97 of flat ratio 1.0, FIMATEC Inc.) after the pigment slurry that formed, relative to pigment 100 weight portion, add the synthesis viscous modifier (trade name: SNTHICKENER641 of alkali thickening type, SAN NOPCO Inc., molecular weight 470,000) 0.2 part, styrene butadiene copolymers latex (trade name: PA7082, A & L Inc. of Japan) 13 parts, surfactant (trade name: Newcol2308LY, emulsifying agent Inc. of Japan) 0.2 weight portion, suitable printing improving agent (trade name: SPI-106N, SUMIKA CHEMTEX Inc.) after 0.25 weight portion, prepare the orlop coating fluid that solid component concentration is 60 % by weight.The viscosity of this coating fluid is 1220mPas, and rupture time is 745ms.
Synthesis viscous modifier (the trade name: SN THICKENER641 of alkali thickening type, SANNOPCO Inc., molecular weight 470,000) be 0.2 part, relative to pigment 100 parts, styrene butadiene copolymers latex (trade name: PA7082, Japanese A & L Inc.) is 8 parts, and make final solid component concentration be 63%, in addition, operate in the same manner as orlop coating fluid, obtain intermediate layer coating fluid.The viscosity of this coating fluid is 1610mPas, and rupture time is 1660ms.
Synthesis viscous modifier (the trade name: SN THICKENER641 of alkali thickening type, SANNOPCO Inc., molecular weight 470,000) be 0.2 part, relative to pigment 100 parts, styrene butadiene copolymers latex (trade name: PA7082, A & L Inc. of Japan) be 10 parts, make final solid component concentration be 61%, in addition, obtain coating fluid in the same manner as orlop coating fluid.The viscosity of this coating fluid is 1350mPas, and rupture time is 790ms.
(making of coated paper)
Adopt the curtain coating device of slidingtype, with every one side 12g/m
2coating weight (orlop: 2g/m
2, intermediate layer: 8g/m
2, the superiors: 2g/m
2) mode curtain coating device with the coating speed of 900m/ minute at senior body paper (grammes per square metre 66.5g/m
2) on be coated with, implement dry, obtain coated paper for printing.
［ comparative example 1 ］ (alkali thickening type viscosity improver)
In the preparation of the coating fluid of embodiment 7, prepare the coating fluid that final solid component concentration is 54 % by weight, in addition, obtain coated paper for printing similarly to Example 1.The viscosity of coating fluid is 821mPas, and rupture time is 374ms.
［ comparative example 2 ］ (ethoxy etherification starch)
Use ethoxy etherification starch (trade name: ETHYLEX2005, Tate & Lyle Inc.) 4 weight portions replacement viscous modifiers, prepare the coating fluid that final solid component concentration is 66 % by weight, in addition, obtain coated paper for printing similarly to Example 1.The viscosity of coating fluid is 1000mPas, and rupture time is 277ms.
［ comparative example 3 ］ (alkali thickening type viscosity improver)
In the preparation of the coating fluid of embodiment 1, use the viscous modifier (trade name: SN THICKENER641 of alkali thickening type, SAN NOPCO Inc., molecular weight 470,000) 0.6 weight portion replaces the viscous modifier of non-alkali thickening type, prepare the coating fluid that final solid component concentration is 62 % by weight, in addition, coated paper for printing is obtained similarly to Example 1.The viscosity of coating fluid is 3667mPas, and rupture time is 2140ms.
［ comparative example 4 ］ (non-alkali thickening type viscosity improver)
In the preparation of the coating fluid of embodiment 1, use the viscous modifier (trade name: SN THICKENER929S of non-alkali thickening type, SAN NOPCO Inc., molecular weight 600,000) 0.4 weight portion, prepare the coating fluid that final solid component concentration is 54 % by weight, in addition, coated paper for printing is obtained similarly to Example 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 thickening type, prepare the coating fluid that final solid component concentration is 69 % by weight, in addition, obtain coated paper for printing similarly to Example 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, be used in the bodystock paper used in embodiment 9, in addition, obtain coated paper for printing in the same manner as comparative example 5.
［ comparative example 7 ］
Use coating fluid supply to replace curtain coating device for the knife coating apparatus of fountain (jet-fountain) mode, in addition, obtain coated paper for printing similarly to Example 6.
These results are shown in table.As seen from table, according to the present invention, pitfall can be obtained and occur less and the printing of blank sheet of paper quality and press quality excellence coating paper using.
[table 2-1]
[table 2-2]
Claims (5)
1. a manufacture method for coated paper for printing, leads to the curtain type membrane in coating fluid by body paper and on body paper, forms coating layer,
The coating speed forming described coating layer is less than 1000m/ minute,
The rupture time of described coating fluid is more than 500ms, and the Type B viscosity of 30 DEG C is 1000mPas ~ 3000mPas, and,
Described coating fluid comprises viscous modifier, and it is the polymer of more than 400,000 that this viscous modifier contains the molecular weight formed based on acrylic monomer unit,
Described coating fluid contains the pigment that flat ratio is less than 2.0, and described flat ratio following formula represents:
The specific area of flat ratio=obtain by BET method/suppose that particle is the specific area that desirable spheroid is obtained by laser diffraction formula size distribution.
2. the manufacture method of coated paper for printing as claimed in claim 1, wherein, described viscous modifier is the viscous modifier of alkali thickening type.
3. the manufacture method of coated paper for printing as claimed in claim 1, wherein, described viscous modifier is the viscous modifier of non-alkali thickening type.
4. the manufacture method of the coated paper for printing according to any one of claims 1 to 3, wherein, described pigment is the calcium carbonate obtained by the precipitated calcium carbonate of fusiform calcite crystallization is carried out case of wet attrition, and the content of this calcium carbonate in coating fluid is 40 ~ 100 weight portions in whole pigment 100 weight portion.
5. a coated paper for printing, adopts the method according to any one of Claims 1 to 4 to obtain.
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 CN102782216A (en) | 2012-11-14 |
| CN102782216B true 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 |
| JP6212457B2 (en) * | 2014-09-24 | 2017-10-11 | 北越紀州製紙株式会社 | Inkjet printing paper |
| JP6212458B2 (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 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2841923B2 (en) * | 1991-06-07 | 1998-12-24 | 日本製紙株式会社 | Manufacturing method of coated paper for printing |
| EP1249533A1 (en) * | 2001-04-14 | 2002-10-16 | The Dow Chemical Company | 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 |
| DE102004045171A1 (en) * | 2004-09-17 | 2006-03-23 | Basf Ag | Process for the preparation of mono- and / or multicoated substrates |
-
2011
- 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
- 2011-02-25 JP JP2012501882A patent/JP5694287B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102782216A (en) | 2012-11-14 |
| JPWO2011105552A1 (en) | 2013-06-20 |
| WO2011105552A1 (en) | 2011-09-01 |
| JP5694287B2 (en) | 2015-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102782216B (en) | Coated printing paper and process for producing same | |
| US6547929B2 (en) | Paper having improved print quality and method of making the same | |
| EP2814890B1 (en) | Pigment compositions | |
| US20140004340A1 (en) | Light and smooth coating for paper or board, or a paint coating, formed using a composite structure | |
| JP2009041131A (en) | Method for producing coated white paperboard and coated white paperboard | |
| JP2011011447A (en) | Inkjet recording medium | |
| JP2008527181A (en) | COATED PAPER PRODUCT AND METHOD AND APPARATUS FOR PRODUCING COATED PAPER PRODUCT | |
| AU2008219820B2 (en) | Pigment composition | |
| US20210348337A1 (en) | Print-medium paper and method | |
| US20130011553A1 (en) | Processes for preparing coated printing paper | |
| CN104169496B (en) | Coated manila and manufacture method thereof | |
| CN100560866C (en) | The photogravure coated paper | |
| JP4918746B2 (en) | Manufacturing method of coated paper for offset printing and coated paper | |
| JP3394404B2 (en) | Backing base material for flooring and method of manufacturing the same | |
| JP2006233371A (en) | Coated paper and method for producing the same | |
| JPH09158085A (en) | Production of coated paper for offset printing and coated paper | |
| JP3328922B2 (en) | Coated paper for offset printing and method for producing the same | |
| JPH0921092A (en) | Printing paper and its production | |
| JP2004162198A (en) | Gloss lightweight coated paper for rotary offset printing | |
| JP2011021286A (en) | Method for forming wet double coating layer and coated paper for printing using the same | |
| JP4377425B2 (en) | Manufacturing method of fine coated paper | |
| JP2005248351A (en) | Coated paper for printing | |
| JP5135855B2 (en) | Method for producing coated paper for printing | |
| KR20160125508A (en) | Inorganic particulate suspension having improved high shear viscosity | |
| JPH1096193A (en) | Coated paper and production of the same |
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 |