CN103572666A - Coated white paperboard - Google Patents
Coated white paperboard Download PDFInfo
- Publication number
- CN103572666A CN103572666A CN201210260036.4A CN201210260036A CN103572666A CN 103572666 A CN103572666 A CN 103572666A CN 201210260036 A CN201210260036 A CN 201210260036A CN 103572666 A CN103572666 A CN 103572666A
- Authority
- CN
- China
- Prior art keywords
- surface layer
- layer
- paper
- calcium carbonate
- coated manila
- 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
- 239000011087 paperboard Substances 0.000 title abstract 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 131
- 239000002344 surface layer Substances 0.000 claims abstract description 123
- 239000010410 layer Substances 0.000 claims abstract description 103
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 60
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 47
- 239000000049 pigment Substances 0.000 claims description 56
- 241000276489 Merlangius merlangus Species 0.000 claims description 38
- 239000002245 particle Substances 0.000 claims description 30
- 229940088417 precipitated calcium carbonate Drugs 0.000 claims description 29
- 239000001023 inorganic pigment Substances 0.000 claims description 14
- 238000010276 construction Methods 0.000 claims description 4
- 239000010893 paper waste Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 37
- 239000002994 raw material Substances 0.000 description 33
- 239000011248 coating agent Substances 0.000 description 30
- 238000000576 coating method Methods 0.000 description 30
- 239000011247 coating layer Substances 0.000 description 24
- 230000015572 biosynthetic process Effects 0.000 description 18
- 238000005755 formation reaction Methods 0.000 description 18
- 239000000843 powder Substances 0.000 description 17
- 238000007639 printing Methods 0.000 description 17
- 238000010298 pulverizing process Methods 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 12
- 239000007787 solid Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 description 9
- 239000011707 mineral Substances 0.000 description 9
- 235000010755 mineral Nutrition 0.000 description 9
- 239000005995 Aluminium silicate Substances 0.000 description 8
- 235000012211 aluminium silicate Nutrition 0.000 description 8
- 238000011156 evaluation Methods 0.000 description 8
- 239000000945 filler Substances 0.000 description 8
- 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 8
- 238000004513 sizing Methods 0.000 description 8
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 7
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 7
- 238000005469 granulation Methods 0.000 description 7
- 230000003179 granulation Effects 0.000 description 7
- 239000000454 talc Substances 0.000 description 7
- 235000012222 talc Nutrition 0.000 description 7
- 229910052623 talc Inorganic materials 0.000 description 7
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 7
- 238000004061 bleaching Methods 0.000 description 6
- 230000007935 neutral effect Effects 0.000 description 6
- 239000012744 reinforcing agent Substances 0.000 description 6
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 5
- 239000002761 deinking Substances 0.000 description 5
- 229920002401 polyacrylamide Polymers 0.000 description 5
- 239000004408 titanium dioxide Substances 0.000 description 5
- 238000005189 flocculation Methods 0.000 description 4
- 230000016615 flocculation Effects 0.000 description 4
- 229920003048 styrene butadiene rubber Polymers 0.000 description 4
- 241001343274 Dichrostachys spicata Species 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 3
- 239000002174 Styrene-butadiene Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 238000010009 beating Methods 0.000 description 3
- 239000007844 bleaching agent Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000008107 starch Substances 0.000 description 3
- 235000019698 starch Nutrition 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- 241001417490 Sillaginidae Species 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000005703 Whiting synthesis reaction Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 2
- 235000010216 calcium carbonate Nutrition 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000011121 hardwood Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 239000011115 styrene butadiene Substances 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000004438 BET method Methods 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- GKPXMGUNTQSFGA-UHFFFAOYSA-N but-2-ynyl 1-methyl-3,6-dihydro-2h-pyridine-5-carboxylate;4-methylbenzenesulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1.CC#CCOC(=O)C1=CCCN(C)C1 GKPXMGUNTQSFGA-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- MMCOUVMKNAHQOY-UHFFFAOYSA-N carbonoperoxoic acid Chemical compound OOC(O)=O MMCOUVMKNAHQOY-UHFFFAOYSA-N 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000007766 curtain coating Methods 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001254 oxidized starch Substances 0.000 description 1
- 235000013808 oxidized starch Nutrition 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- ZSDSQXJSNMTJDA-UHFFFAOYSA-N trifluralin Chemical compound CCCN(CCC)C1=C([N+]([O-])=O)C=C(C(F)(F)F)C=C1[N+]([O-])=O ZSDSQXJSNMTJDA-UHFFFAOYSA-N 0.000 description 1
- 229940089401 xylon Drugs 0.000 description 1
Images
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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/06—Layered products comprising a layer of paper or cardboard specially treated, e.g. surfaced, parchmentised
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
Landscapes
- Paper (AREA)
Abstract
The invention provides a coated white paperboard without obvious hickie. Through use of 3-10wt% of calcium carbonate in a surface layer prepared from surface layer paper pulp, the coated white paperboard which has a multilayer papermaking structure and uniformly hides a dark gray color caused by waste paper closer to the inner side than a lining layer is obtained.
Description
Technical field
The present invention relates to a kind of coated manila, especially sandwich layer is used the coated manila of secondary stock, more specifically, relates to and a kind ofly has appearance without the obvious coated manila of the blank sheet of paper outward appearance of hickie.
Background technology
White board can print, and as package paper, uses.Therefore, on white board, just need printing adaptability energy.In addition, when white board is white, do not have hickie to become important problem yet.Said white board is that every weight per square meter is at 150g/m herein
2above ground paper, the general sandwich construction by 3 layers～9 layers forms.For example, the multilayer white board that is known as surface layer, lining, sandwich layer, bottom of producing by copy paper.The formation of 1 routine this white board as shown in Figure 1.Fig. 1 is the sectional view of white board.101 finger white boards in Fig. 1,110 finger surface layers, 120 finger linings, 130 finger sandwich layers, 140 finger bottoms.In addition, in Fig. 1, the ratio of each layer is not necessarily directly proportional to actual (real) thickness.Particularly, in Fig. 1, form outermost surface layer (110) and conventionally use the bleached pulp that whiteness is high.In abutting connection with the lining (120) of surface layer (110) inner side and the bottom (140) of formation internal layer, conventionally use the secondary stock that whiteness is higher.And the sandwich layer (130) that forms la m is used secondary stock conventionally.The secondary stock using in general sandwich layer (130) is dimmed.In order to hide the lead of sandwich layer, surface layer can be manufactured paper with pulp into high whiteness layer conventionally with lining.Utilize this formation, when seeking waste paper recycling, also can obtain white white board.Yet, even if utilize surface layer or lining, also cannot fully hide the lead of sandwich layer, there is the problem of hickie in appearance that produces.
Therefore, disclose by every weight per square meter weight range of regulation surface layer, lining, and poor between surface layer whiteness and lining whiteness, thereby reduced the method (for example, patent documentation 1) of white board hickie.
The hickie of giving printing adaptability energy, improve blank sheet of paper surface whiteness, improving blank sheet of paper surface of take is object, has produced the coated manila that is provided with pigment application layer at least one side of white board.As this coated manila, the method (for example, patent documentation 2) of using the inorganic pigments such as titanium dioxide with high hiding at pigment application layer is disclosed.Yet, must use in a large number higher-priced titanium dioxide, there is the problem that production cost uprises.In addition,, because the every weight per square meter of white board is large, so the difference of the every weight per square meter of part also easily becomes greatly, when so-called smoothing coating machines such as using scraper or excellent coating machine is coated with, easily cause the change of part coating weight.Therefore,, even if the pigment application layer containing titanium dioxide with high hiding is set, the situation that the apparent hickie of coated manila cannot be eliminated also can occur.
[patent documentation 1] TOHKEMY 2005-298998 communique
[patent documentation 2] TOHKEMY 2006-328574 communique
Summary of the invention
The object of the present invention is to provide a kind of coated manila that makes the minimizing of hickie in appearance on surface.
In order to solve above-mentioned problem, the present invention adopts following formation.; coated manila of the present invention is that the coated manila of the pigment application layer that contains inorganic pigment is set at least one face of white board of sandwich construction at least with surface layer, sandwich layer and bottom; it is characterized in that; surface layer contains calcium carbonate as inorganic pigment; the calcium carbonate content of surface layer is 3 quality %～20 quality % with respect to the paper pulp amount of surface layer; pigment application layer is arranged on the surface of surface layer, and the inorganic pigment as containing in pigment application layer, contains powdered whiting.According to this formation, can obtain when printing the possibility that comes off from paper surface of paper powder little, in appearance without the coated manila of hickie.
In addition, about coated manila of the present invention, the content of the calcium carbonate of surface layer can be above with respect to 3 quality % of the paper pulp amount of surface layer, be less than 10 quality %.According to this formation, can obtain at when printing coated manila of further reducing of the possibility that comes off from paper surface of paper powder.
In addition,, about coated manila of the present invention, in surface layer, contained calcium carbonate can be BET specific area 6.0m
2/ g is above, be less than 10.0m
2the precipitated calcium carbonate of/g.According to this formation, can obtain when printing paper powder from paper surface, come off few, in appearance without the coated manila of hickie.
In addition, about coated manila of the present invention, the calcium carbonate containing in surface layer can be contain 70 quality % above～be less than the powdered whiting of the particle below the particle diameter 2 μ m of 95 quality %.According to this formation, can obtain whiteness high, and in appearance without the coated manila of hickie.
In addition,, about coated manila of the present invention, surface layer is above with the 60 quality % that are arranged at whole inorganic pigments contained in the pigment application layer of facing surface can be calcium carbonate.According to this formation, can be when reducing costs, obtain that whiteness is high, outward appearance is without the coated manila of hickie.
According to the present invention, can obtain when printing possibility of coming off from paper surface of paper powder little, in appearance without the coated manila of hickie.Thus, for example, can improve like this aesthetic property of coated manila, meanwhile, even if manufacture to arrange, take the coated manila of the coating layer that pigment is main body, also can improve hickie in appearance.In addition,, when manufacturing coated manila of the present invention, the pH during due to copy paper is in neutrality or alkalescent scope, so can use in a large number waste paper.That is,, in the neutralized paper of paper, newspaper carries out, because the calcium carbonate that wherein used dissolves in acid copy paper, thereby in being used, a large amount of waste paper is restricted.If but as the present invention, copy paper within the scope of neutrality or alkalescent, is limited by this type of no longer, can use in a large number waste paper.
The specific embodiment
Below explain embodiments of the present invention.
Coated manila of the present invention is the sandwich construction that following layer is formed by the order copy paper of surface layer/lining/sandwich layer/bottom, wherein, contains magma, high whiteness bleaching secondary stock in surface layer; In lining and bottom, contain than the low secondary stock of paper pulp whiteness contained in surface layer, in sandwich layer, contain than the low secondary stock of paper pulp whiteness contained in lining and bottom.Wherein, although be provided with lining in order to hide the lead of sandwich layer, by making the weight of every square metre of surface layer become the large processing that waits, while making only to rely on surface layer just can fully guarantee hiding, also can manufacture paper with pulp into the structure that lining is not set.1 routine coated manila of the present invention as shown in Figure 2.Fig. 2 is the sectional view of coated manila of the present invention.In Fig. 2,10 is white board, and 1 is surface layer, and 2 is lining, and 3 is sandwich layer, and 4 is bottom, and 5 is pigment application layer.In addition, in Fig. 2, the ratio of each layer is not necessarily directly proportional to actual (real) thickness.Enumerate a concrete structure example, the formation of coated manila is that the weight of every square metre of sandwich layer is 50g/m
2～500g/m
2, whiteness is 35%～60%; The weight of every square metre of lining is 20g/m
2～80g/m
2, whiteness is 55%～75%; The weight of every square metre of surface layer is 15g/m
2～60g/m
2, whiteness is 70%～85%.The formation of bottom can be according to the use variation of coated manila, but also can manufacture paper with pulp into same formation with lining or surface layer.Pigment application layer is at least arranged at the surface of surface layer.Because coated manila is widely used in front cover, the paper-made vessel of book, therefore, its weight of every square metre has contained 150g/m
2～600g/m
2on a large scale.When the weight of change every square metre of coated manila, from effectively utilizing waste paper, reduce the angle of manufacturing cost, can mainly select to change the sandwich layer number of plies, the weight of every square metre.In addition, according to purposes, expectation face bottom indiscriminate coated manila on whiteness, in this case, for the paper pulp kind that makes surface layer and bottom there is the whiteness of same degree, adjust to use in each layer of raw material and the weight of every square metre of each layer.For example, at surface layer and bottom, use same materials paper pulp, while obtaining face bottom without the poor white board of whiteness, because must improve the hiding of the sandwich layer that whiteness is lower, so the weight of every square metre of bottom is larger than the weight of every square metre of surface layer.Or, also can the bottom lining layer with lining with identical formation be set between sandwich layer and bottom, manufacture paper with pulp into the structure of surface layer/lining/sandwich layer/bottom lining layer/bottom.In addition,, in not requiring the purposes of white board one side whiteness, in bottom, also can use the raw material identical with lining to form.And, not only on the surface of the surface layer of above-mentioned arbitrary structure, and on the surface of bottom, also can arrange pigment coated.Be to arrange in pigment coated situation on two surfaces of surface layer and bottom, by change the coating amount of a side face and the opposing party's face can on whiteness, arrange table bottom poor.These formations can be carried out suitable change according to the purposes of coated manila.
The whiteness of coated manila and apparent hickie are according to its purposes, and the necessity of its improvement becomes higher.When paper-made vessel for hard-cover, be necessary for whiteness high, and the few coated manila of hickie visually.When adjusting whiteness and apparent hickie, can mainly by adjusting the weight of every square metre of surface layer, realize.By increasing the weight of every square metre of surface layer, whiteness is improved, hickie improves, and but then, can produce the problem that can not effectively utilize waste paper and cost also cannot cut down.As the ratio of surface layer, it is little that expectation can realize the weight of every square metre, and whiteness is high simultaneously, for without significant hickie, hiding is high.
As everyone knows, in order to improve the hiding of paper when maintaining whiteness, as filler contained in surface layer, use kaolin, talcum, calcium carbonate, titanium etc.High but the whiteness of kaolin hiding is not as good as calcium carbonate, and cost is also expensive.Talcum whiteness is not as good as calcium carbonate, and hiding is also poor.Titanium is best aspect whiteness, hiding, but yield rate on copy paper production line is low and price height is its application difficult point.From the angle of whiteness, hiding, calcium carbonate is that low price adds filler in easy-to-use.
Yet in coated manila in the past, the filler contained as surface layer seldom used calcium carbonate.Particularly in manufacture, have while take the coated manila of the pigment application layer that kaolin is main body, in the surface layer of coated manila, never use percarbonic acid calcium as the interior filler that adds.As reason, can enumerate, owing to take, the hiding of the pigment application layer that kaolin is main body is high, so do not contain the necessity of calcium carbonate in surface layer.In addition, can enumerate, while containing calcium carbonate in surface layer, easily reduce the degree of sizing of the acid rosin sizing agent all the time using as sizing agent, must use neutral rosin sizing agent.In addition, can also enumerate, compare with kaolin, talcum, calcium carbonate itself also easily causes yield rate reduction etc.In addition, it is generally acknowledged, utilize the plain boiled water blackout of the lining of waste paper, therefore affected by it, even if use calcium carbonate on surface layer, especially use the powdered whiting of hiding and talcum same degree, can not improve whiteness hickie.Although there are these results of study, make people surprised, in the present invention, by the calcium carbonate with the performance of whiteness and hiding excellence is added in surface layer, can improve whiteness and hickie.
Coated manila of the present invention, is characterized in that, contains calcium carbonate as inorganic pigment in surface layer, and the content of this calcium carbonate is the 3 quality %～20 quality % with respect to the paper pulp amount of surface layer.When the content of calcium carbonate is less than 3 quality % with respect to the paper pulp amount of surface layer, lack the raising of whiteness that caused by calcium carbonate, the improvement of covering power can not improve apparent hickie.On the other hand, the content of calcium carbonate when many, improves although be accompanied by whiteness than 20 quality % with respect to the paper pulp amount of surface layer, and covering power is improved, and apparent hickie is significantly improved, and when printing, may occur that paper powder comes off from paper surface.In the present invention, can make the contained calcium carbonate content of surface layer be more than 3 quality %, be less than 10 quality %, can further obtain the coated manila that does not exist paper powder to come off from paper surface when printing.
As the calcium carbonate using in the present invention, preferred powdered whiting and/or precipitated calcium carbonate.Powdered whiting is to adopt dry method or wet pulverizing to process and obtain in lime stone.Precipitated calcium carbonate is that lime stone is sintered into for the time being to lime in kiln etc., then adds water digestion, passes into carbon dioxide and utilizes carburizing reagent to be synthesized into.Although powdered whiting is poorer than precipitated calcium carbonate aspect whiteness and hiding, to compare with kaolin and talcum, its whiteness is high, also can improve apparent hickie.In addition, although powdered whiting is the filler that production line abrasiveness is high, adopts wet pulverizing and particle diameter diminished and can improve abrasiveness, in the relatively slow paper-making process of copy paper speed, can make full use of powdered whiting can as in add filler.Precipitated calcium carbonate is compared with powdered whiting, and owing to having higher whiteness and hiding, production line abrasiveness is also low, so can utilize aptly precipitated calcium carbonate as the interior filler that adds.
In coated manila of the present invention, in surface layer, contained calcium carbonate can be used the specific area 6.0m that BET method is measured
2/ g is above, be less than 10.0m
2the precipitated calcium carbonate of/g.The not enough 6.0m of BET specific area of precipitated calcium carbonate
2during/g, improving the effect of hickie in appearance has the tendency diminishing.BET specific area is at 10.0m
2although precipitated calcium carbonate hickie more than/g to improve effect remarkable, because the particle diameter of precipitated calcium carbonate attenuates, ply of paper intensity also reduces, so may cause paper powder to come off from paper surface during printing.
In coated manila of the present invention, in surface layer contained calcium carbonate can be contain 70 quality % above～be less than the powdered whiting of the particle below 95 quality % particle diameter 2 μ m.During the ratio less than 70 quality % of the powdered whiting below particle diameter 2 μ m, may occur that whiteness improves reduces, and can not substantially improve hickie.And its ratio is while surpassing 95 quality %, although the improvement of hickie is good, because particle diameter attenuates, ply of paper intensity also reduces, so paper powder comes off from paper surface in the time of may causing printing.In addition, as previously mentioned, as powdered whiting contained in surface layer, consider the abrasiveness of production line, preferably use the powdered whiting of being processed by wet pulverizing.Because the powdered whiting size distribution that the powdered whiting that wet pulverizing was processed was processed than dry pulverization process is more tending towards sharply, so easily process, also can improve the abrasiveness of production line.
In coated manila of the present invention, in the pigment application layer of surface layer and facing surface setting, all contain calcium carbonate.At surface layer and pigment application layer, can contain separately calcium carbonate inorganic pigment in addition, but weight of calcium carbonate is preferably with respect to more than whole inorganic pigments contained in surface layer and pigment application layer 60 quality %.By this formation, can cheap produce whiteness high and without the coated manila of hickie.
There is no particular limitation for the raw material paper pulp using in surface layer of the present invention.For example, derive from the bleaching leaf wood sulfate wood pulp (L-BKP) that the natural pulps such as xylon, bast fiber, bast fiber are main body and can be used as principal component use.The concrete example of wood pulp in addition has bleaching needlebush sulfate wood pulp (N-BKP), bleaching needlebush sulphite wood pulp (N-BSP), bleaching leaf wood sulphite wood pulp (L-BSP) etc.In addition, mechanical pulp (GP), chemical thermomechanical paper pulp (CTMP), de inked pulp (DIP) also can carry out according to purposes the mixing of arbitrary proportion.Although also can use secondary stock, for fear of causing that whiteness reduces, the secondary stock of the high whiteness high-quality of necessary use system etc., or use on a small quantity.In the present invention, for example, all in paper pulp, can contain bleaching leaf wood sulfate wood pulps (L-BKP) more than 70 quality %, such as content is 75～98 quality %.In addition, (Canadian Standard Freeness CSF) is preferably adjusted to 250～600cc scope to the drainability of paper pulp.
In lining, use than the low secondary stock of surface layer paper pulp whiteness, sandwich layer is used the lower secondary stock of whiteness, but the drainability of paper pulp has no particular limits.In addition, particularly about filler, add, so long as add in the scope that does not reduce ply of paper intensity, have no particular limits.The formation of bottom can be carried out suitable change according to the purposes of coated manila, can have identical formation with lining or surface layer.
In not damaging the scope of effect of the present invention, in surface layer, lining, sandwich layer and bottom, can use flocculation aid, paper strength reinforcing agent, painted taste dyestuff, painted taste pigment, sizing agent.In addition the operability when improving copy paper, use yield rate improving agent, drainability improving agent, defoamer that can be suitable.For example in the present invention, can add the above-mentioned additive with respect to 0.001～5 quality % of the paper pulp amount of surface layer.Specifically, as flocculation aid, can be enumerated as aluminum sulfate, for example can add in the present invention 0.01～2 quality % with respect to the paper pulp amount of surface layer.As paper strength reinforcing agent, can be enumerated as polyacrylamide, for example can add in the present invention 0.01～2 quality % with respect to the paper pulp amount of surface layer.As sizing agent, can be enumerated as neutral rosin, for example can add 0.01～2 quality % with respect to the paper pulp amount of surface layer.
Copy paper makes surface layer, lining, sandwich layer and bottom respectively, then manufactures paper with pulp, and produces the white board that forms coated manila body paper.Now, preferred copy paper under neutrality or alkalescent scope, for example pH6.8～8.5 condition.Copy paper method can be used the known copy paper methods such as fourdrinier wire formula, cylinder.To give the objects such as this white board printing adaptability, be provided with pigment application layer.Pigment application layer is to form by coating, the dry coating being comprised of pigment and adhesive.
Inorganic pigment as in pigment application layer, contains powdered whiting.In addition, although can suitably be used in combination the public pigment such as clay, precipitated calcium carbonate, titanium dioxide, plastic pigment, the main powdered whiting that preferably uses.Even the solid state component of coating is more than 64 quality % in pigment application layer, in order to make good fluidity, suppress the generation of striped, more than powdered whiting can at least be used 60 quality % in pigment, preferably use 65～95 quality %.Powdered whiting used herein, because the powdered whiting size distribution that the powdered whiting that uses wet pulverizing processing to obtain obtains than dry pulverization process processing is more sharp-pointed, easily processes, therefore preferably.
As the sticker in pigment application layer, be enumerated as the cellulose derivatives such as styrene butadiene copolymer rubber (SBR), MMB methyl methacrylate butadiene copolymer rubber equiconjugate dienes polyrubber, polyvinyl alcohol, oxidized starch, carboxymethyl cellulose, hydroxyethylcellulose, can be separately or two or more mix and use.The consumption of sticker can be for example 5～30 weight portions with respect to 100 weight portion pigment.
In addition, as required, in the coating using in pigment application layer, also can suitably use the pH adjusting agents such as dispersant, caustic soda, ammoniacal liquor, defoamer, illuminating colour pigment, hydrophober, flow ability modifying agent etc.
Forming pigment application layer on the white board of body paper and be generally by 2 layers of lower coating layers, upper coating layer and form, but also can be individual layer, can be also more than 3 layers.The coating weight of pigment application layer is by every layer of average dry mass, conventionally at 5g/m
2～15g/m
2scope.For example, when the pigment application layer that is set to 2 layers, the coating weight of lower coating layer is at 5g/m by dry mass
2～15g/m
2scope in implement coating, the coating weight of upper coating layer is at 5g/m
2～13g/m
2scope in implement coating.In addition, curling in order to prevent in the generation of the surface of white board bottom, also can arrange by dry mass scope at 1g/m
2～15g/m
2single coating layer, this coating layer can be pigment application layer, can be also the coating layer mainly not consisting of adhesive containing pigment.When particularly bottom copy paper becomes to contain the layer of waste paper, in order to reach the impurity of hiding the waste paper origin containing in this layer, and prevent the object that it comes off, can coating layer be set on the surface of bottom.
As the not restriction of coating machine that forms coating layer, can appropriately combined use such as roll coaters such as air doctor blade coating machine, knife type coater, rod coater (rod coater), curtain coating machine and door roll coater (gate roll coater), screening machines etc.When being provided with double-deck above coating layer, as lower coating, form device and preferably use rod coater, as upper coating formation device, preferably use rod coater, knife type coater.Can be coated with respectively, for example, form undermost coating layer and adopt rod coater, the second layer coating layer that forms intermediate layer adopts rod coater, forms outermost the 3rd layer of coating layer and adopts knife type coater.
Embodiment
Below enumerate embodiment, the present invention is described more specifically, but the present invention is not limited in these certainly.In addition, in following embodiment and comparative example, so-called part and % represent respectively solid state component parts by mass, solid state component quality %.
Each evaluation method is implemented according to following method.
1) mensuration of whiteness
In accordance with ISO 2470:1999 Paper, board and pulps-Measurement of diffuse blue reflectance factor (ISO brightness) measures the pigment application layer that facing surface arranges.
2) mensuration of precipitated calcium carbonate BET specific area
Adopt nitrogen adsorption method (Micromeritics company system, TriStar II 3020) to measure.
3) mensuration of wet method powdered whiting particle diameter
Adopt laser beam diffraction/diffuse transmission type particle size distribution device (LA-920/ hole field makes made) to measure the mass accumulation % below particle diameter 2 μ m.
4) hickie
By range estimation, adopt the hickie in the pigment application aspect that 5 level evaluation facing surfaces arrange.In 5 ranks, by the good average evaluation that does not observe hickie completely, be 5, the most serious average evaluation of hickie is 1.In 5 ranks, be evaluated as 3～5, it is qualified to be judged to be, be rank no problem in practice; Be evaluated as 1 or 2, so because hickie is seriously judged to be defective.
5) the paper powder in when printing evaluation that comes off
Use the made RI printing of bright making testing machine, adopt 0.4cc Toyo Ink Co., Ltd. SMX-25 tusche processed, under 60rpm, in the pigment application aspect of facing surface setting, print the degree that comes off of visual assessment paper powder.Evaluation is undertaken by 4 ranks.In 4 ranks, by not observing the good average evaluation that paper powder comes off completely, be 4; What occur that a large amount of paper powder come off is evaluated as 1.In 4 ranks, be evaluated as 2～4, it is qualified to be judged to be, be rank no problem in practice; Be evaluated as 1, thus due to occur a large amount of paper powder come off be judged to be defective.
Embodiment
The making > of coating for coating layer under <
3 parts of 20 parts of kaolin (hydrasperse processed of KEIMIN company), 80 parts of wet method powdered whitings (Imerys Minerals Japan K.K. carbital 60 processed), 15 parts of styrene butadiene polyrubbers, organic phosphate starch are scattered in water, obtain the coating that the lower coating layer of solid component concentration 64 quality % is used.
The making > of coating for the upper coating layer of <
By 30 parts of kaolin (CADAM company system, Amazon SB), 60 parts of wet method powdered whitings (Imerys Minerals Japan K.K. carbital 90 processed), titanium dioxide (DuPont Co., Ltd. 15 parts of RPS-Vantage processed) 10 parts, styrene butadiene polyrubber are scattered in water, obtain the coating that the upper coating layer of solid component concentration 64 quality % is used.
(embodiment 1)
90 parts of hardwood pulps (L-BKP) are scattered in water with 10 parts, needlebush oar (N-BKP), be adjusted to CSF350cc and obtain stream slurry, in starching to stream, mixture content is the precipitated calcium carbonate (trade name: the BET specific area processed 7.0m of TP121-6S/ Okutama Kogyo Co., Ltd. with respect to paper pulp amount 4%
2/ g) obtain the raw material of surface layer.Then in water, disperse the deinking of not making beating to bleach the raw material that secondary stock obtains lining and bottom.Then in water, disperse the useless magazine paper pulp of deinking to obtain the raw material of sandwich layer.Adopt fourdrinier paper machine under pH7.7 condition, utilize various raw materials to manufacture paper with pulp into by 4 layers of surface layer/lining/sandwich layer/bottoms and form, every weight per square meter is 310g/m
2white board.Every weight per square meter of the surface layer of the white board obtaining is 25g/m
2, whiteness is 78%; Every weight per square meter of lining is 40g/m
2, whiteness is 66%; Every weight per square meter of sandwich layer is 190g/m
2, whiteness is 55%; Every weight per square meter of bottom is 55g/m
2, whiteness is 66%.In addition, in surface layer, add respectively polyacrylamide as paper strength reinforcing agent, as the aluminum sulfate of flocculation aid, neutral rosin as sizing agent, wherein, the addition of polyacrylamide is with respect to 0.2% of the paper pulp amount of surface layer, aluminum sulfate is with respect to 0.2% of the paper pulp amount of surface layer, and neutral rosin is with respect to 0.3% of the paper pulp amount of surface layer.In addition, added the starch as paper strength reinforcing agent in lining, sandwich layer, bottom, its addition is with respect to 0.2% of each layer of paper pulp amount.On the surface of surface layer that as above operates the white board obtaining, be provided with the pigment application layer that forms lower floor, this pigment application layer is that to adopt excellent coating machine to be coated with to plant coating layer to make solid state component with coating be 10g/m
2and be dried and form.Then, the pigment application layer that forms upper strata is set on the pigment application layer surface that forms lower floor, thereby obtains coated manila, wherein, the pigment application layer that forms upper strata is that to adopt the upper coating layer of knife type coater coating to make solid state component with coating be 10g/m
2and be dried and form.
(embodiment 2)
By the precipitated calcium carbonate mixing in white board surface layer raw material (trade name: the BET specific area processed 7.0m of TP121-6S/ Okutama Kogyo Co., Ltd.
2/ g) be added into respect to 9% of paper pulp amount, in addition, by embodiment 1, with method copy paper, obtain coated manila.
(embodiment 3)
The calcium carbonate mixing in white board surface layer raw material is changed to precipitated calcium carbonate (preproduction ABET specific area 9.5m
2/ g), in addition, by embodiment 1, with method copy paper, obtain coated manila.
(embodiment 4)
The calcium carbonate mixing in white board surface layer raw material is changed to precipitated calcium carbonate (preproduction BBET specific area 6.0m
2/ g), its addition is with respect to 9% of paper pulp amount, in addition, by embodiment 1, with method copy paper, obtains coated manila.
(embodiment 5)
By the precipitated calcium carbonate mixing in white board surface layer raw material (trade name: the BET specific area processed 7.0m of TP121-6S/ Okutama Kogyo Co., Ltd.
2/ g) combined amount is added to respect to 10.5% of paper pulp amount, in addition, by embodiment 1, with method copy paper, obtains coated manila.
(embodiment 6)
The calcium carbonate mixing in white board surface layer raw material is changed to precipitated calcium carbonate (preproduction CBET specific area 5.0m
2/ g), its addition is with respect to 9% of paper pulp amount, in addition, by embodiment 1, with method copy paper, obtains coated manila.
(embodiment 7)
The calcium carbonate mixing in white board surface layer raw material is changed to precipitated calcium carbonate (preproduction DBET specific area 11.0m
2/ g), its addition is with respect to 9% of paper pulp amount, in addition, by embodiment 1, with method copy paper, obtains coated manila.
(embodiment 8)
The calcium carbonate mixing in white board surface layer raw material is changed to precipitated calcium carbonate (preproduction CBET specific area 5.0m
2/ g), its addition is with respect to 3% of paper pulp amount, in addition, by embodiment 1, with method copy paper, obtains coated manila.
(embodiment 9)
The calcium carbonate mixing in white board surface layer raw material is changed to precipitated calcium carbonate (preproduction DBET specific area 11.0m
2/ g), its addition is with respect to 20% of paper pulp amount, in addition, by embodiment 1, with method copy paper, obtains coated manila.
(embodiment 10)
The surface of the coated manila bottom obtaining in embodiment 1, adopting knife type coater to be coated with to plant coating layer to make solid state component with coating is 10g/m
2and be dried to arrange pigment application layer, obtain the two-layer coated manila that all has pigment application layer of surface layer and bottom.
(embodiment 11)
Use each raw material in embodiment 1, adopting fourdrinier paper machine to manufacture paper with pulp into the every weight per square meter consisting of 3 layers of surface layer/sandwich layer/bottoms is 350g/m
2white board, every weight per square meter of its surface layer is 55g/m
2, every weight per square meter of sandwich layer is 220g/m
2, every weight per square meter of bottom is 75g/m
2, in addition, by embodiment 1, with method copy paper, obtain coated manila.
(embodiment 12)
The surface of the coated manila bottom obtaining in embodiment 11, is coated with and is planted coating layer with coating, to make solid state component be 10g/m by knife type coater
2and be dried to arrange pigment application layer, obtain the two-layer coated manila that all has pigment application layer of surface layer and bottom.
(embodiment 13)
10 parts of 60 parts of high-quality secondary stocks, 30 parts of hardwood pulps (L-BKP) and softwood pulps (N-BKP) are scattered in water, be adjusted to CSF350cc and obtain stream slurry, to mixture content in stream slurry for the wet pulverizing powdered whiting with respect to paper pulp amount 7% (trade name: the particle below the 2 μ m of carbital90/Imerys Minerals Japan K.K. granulation footpath containing proportional be 90 quality %) obtain the raw material of surface layer.Then in water, disperse the deinking of not making beating to bleach the raw material that pulp from ONP obtains lining.Then in water, disperse the useless magazine paper pulp of deinking to obtain the raw material of sandwich layer.Then in water, disperse the deinking of not making beating to bleach the raw material that pulp from ONP obtains bottom.Adopt fourdrinier paper machine under pH7.5 condition, utilize various raw materials manufacture paper with pulp into by 4 layers of surface layer/lining/sandwich layer/bottoms form, every weight per square meter is 260g/m
2white board.Every weight per square meter of the surface layer of the white board obtaining is 30g/m
2, whiteness is 78%; Every weight per square meter of lining is 45g/m
2, whiteness is 60%; Every weight per square meter of sandwich layer is 140g/m
2, whiteness is 50%; Every weight per square meter of bottom is 45g/m
2, whiteness is 60%.In addition, in surface layer, add respectively polyacrylamide as paper strength reinforcing agent, as the aluminum sulfate of flocculation aid, neutral rosin as sizing agent, wherein, the addition of polyacrylamide is with respect to 0.2% of the paper pulp amount of surface layer, aluminum sulfate is with respect to 0.3% of the paper pulp amount of surface layer, and neutral rosin is with respect to 0.3% of the paper pulp amount of surface layer.In addition, added the starch as paper strength reinforcing agent in lining, sandwich layer, bottom, its addition is with respect to 0.2% of each layer of paper pulp amount.On the surface of surface layer that as above operates the white board obtaining, be provided with the pigment application layer that forms lower floor, this pigment application layer is that to adopt excellent coating machine to be coated with to plant coating layer to make solid state component with coating be 10g/m
2and be dried and form.Then, be provided with the pigment application layer that forms upper strata, thereby obtain coated manila on the pigment application layer surface that forms lower floor, wherein, the pigment application layer that forms upper strata is that to adopt the upper coating layer of knife type coater coating to make solid state component with coating be 10g/m
2and be dried and form.
(embodiment 14)
The wet pulverizing powdered whiting mixing in white board surface layer raw material (trade name: it is 90 quality % that the particle below the 2 μ m of carbital90/Imerys Minerals Japan K.K. granulation footpath contains proportional) is added to respect to 9% of paper pulp amount, in addition, press embodiment 13 with method copy paper, obtain coated manila.
(embodiment 15)
The wet pulverizing powdered whiting mixing in white board surface layer raw material (trade name: it is 90 quality % that the particle below the 2 μ m of carbital90/Imerys Minerals Japan K.K. granulation footpath contains proportional) is added to respect to 4% of paper pulp amount, in addition, press embodiment 13 with method copy paper, obtain coated manila.
(embodiment 16)
The calcium carbonate mixing in white board surface layer raw material is changed to wet pulverizing powdered whiting (it is 75 quality % that the particle below preproduction X particle diameter 2 μ m contains proportional), in addition, by embodiment 13, with method copy paper, obtain coated manila.
(embodiment 17)
The calcium carbonate mixing in white board surface layer raw material is changed to wet pulverizing powdered whiting (it is 93 quality % that the particle below preproduction Y particle diameter 2 μ m contains proportional), in addition, by embodiment 13, with method copy paper, obtain coated manila.
(embodiment 18)
The wet pulverizing powdered whiting mixing in white board surface layer raw material (trade name: it is 90 quality % that the particle below the 2 μ m of carbital90/Imerys Minerals Japan K.K. granulation footpath contains proportional) is added to respect to 11% of paper pulp amount, in addition, press embodiment 13 with method copy paper, obtain coated manila
(embodiment 19)
The calcium carbonate mixing in white board surface layer raw material is changed to wet pulverizing powdered whiting (it is 65 quality % that the particle below preproduction Z particle diameter 2 μ m contains proportional), its addition is with respect to 3% of paper pulp amount, in addition, by embodiment 13, with method copy paper, obtain coated manila.
(embodiment 20)
The wet pulverizing powdered whiting mixing in white board surface layer raw material (trade name: it is 90 quality % that the particle below the 2 μ m of carbital90/Imerys Minerals Japan K.K. granulation footpath contains proportional) is added to respect to 20% of paper pulp amount, in addition, press embodiment 13 with method copy paper, obtain coated manila.
(comparative example 1)
By the precipitated calcium carbonate mixing in white board surface layer raw material (trade name: the BET specific area processed 7.0m of TP121-6S/ Okutama Kogyo Co., Ltd.
2/ g) change to talcum, its addition is with respect to 10% of paper pulp amount, in addition, by embodiment 1, with method copy paper, obtains coated manila.
(comparative example 2)
By the precipitated calcium carbonate mixing in white board surface layer raw material (trade name: the BET specific area processed 7.0m of TP121-6S/ Okutama Kogyo Co., Ltd.
2/ g) combined amount is added to respect to 2% of paper pulp amount, in addition, by embodiment 1, with method copy paper, obtains coated manila.
(comparative example 3)
The wet pulverizing powdered whiting mixing in white board surface layer raw material (trade name: it is 90 quality % that the particle below the 2 μ m of carbital90/Imerys Minerals Japan K.K. granulation footpath contains proportional) is added to respect to 2% of paper pulp amount, in addition, press embodiment 13 with method copy paper, obtain coated manila.
(comparative example 4)
By the precipitated calcium carbonate mixing in white board surface layer raw material (trade name: the BET specific area processed 7.0m of TP 121-6S/ Okutama Kogyo Co., Ltd.
2/ g) combined amount is added to respect to 25% of paper pulp amount, in addition, by embodiment 1, with method copy paper, obtains coated manila.
(comparative example 5)
The wet pulverizing powdered whiting mixing in white board surface layer raw material (trade name: it is 90 quality % that the particle below the 2 μ m of carbital90/Imerys Minerals Japan K.K. granulation footpath contains proportional) is added to respect to 25% of paper pulp amount, in addition, press embodiment 13 with method copy paper, obtain coated manila.
The white board being obtained by each embodiment and comparative example or the evaluation result of coated manila are as shown in table 1.From table 1, can clearly learn, the coated manila being obtained by embodiment 1～20, any one is all difficult to observe hickie, and visual observation is good, the paper powder that also can the meet when printing requirement that comes off.
The coated manila being obtained by embodiment 8, because the precipitated calcium carbonate adding in surface layer is fewer, in addition, the precipitated calcium carbonate BET specific area of using is also little, so compare with other embodiment, its whiteness is low, hickie is serious in appearance, but still is no problem in actual applications rank.
The coated manila being obtained by embodiment 9, because the precipitated calcium carbonate adding in surface layer is many, in addition, the precipitated calcium carbonate BET specific area of using is also large, so compare with other embodiment, paper powder obscission during its printing is serious, but still is no problem in actual applications rank.
The coated manila being obtained by embodiment 19, because the powdered whiting adding in surface layer is fewer, in addition, particle below the powdered whiting particle diameter 2 μ m that use is containing proportional also low, so compare with other embodiment, its whiteness is low, and hickie is serious in appearance, but still is no problem in actual applications rank.
The coated manila being obtained by embodiment 20, because the powdered whiting adding in surface layer is many, in addition, particle below the powdered whiting particle diameter 2 μ m that use is containing proportional also high, so compare with other embodiment, paper powder obscission during its printing is serious, but still is no problem in actual applications rank.
The coated manila being obtained by comparative example 1, because the inorganic pigment as containing in surface layer has been used talcum, so in the ratio of addition, its whiteness is low, and hickie is serious, can not meet practical application.
The coated manila being obtained by comparative example 2 and comparative example 3, because the amount of the calcium carbonate adding to surface layer is very few, so can not meet the disguise of surface layer, cause its whiteness low, and hickie is serious, can not meet practical application.
The coated manila being obtained by comparative example 4 and comparative example 5, because the amount of the calcium carbonate adding to surface layer is too much, so the paper powder while causing printing comes off obviously, can not meet practical application.
Claims (5)
1. a coated manila, described coated manila at least have surface layer, lining, sandwich layer and bottom sandwich construction white board at least in one side, be provided with the pigment application layer that contains inorganic pigment, it is characterized in that,
Described surface layer contains calcium carbonate as inorganic pigment;
The content of the calcium carbonate of described surface layer is 3 quality %～20 quality % with respect to the paper pulp amount of surface layer;
Described pigment application layer is arranged on the surface of surface layer;
Inorganic pigment as containing in described pigment application layer, contains powdered whiting.
2. coated manila as claimed in claim 1, is characterized in that, the content of the calcium carbonate of described surface layer with respect to the paper pulp amount of surface layer be 3 quality % above, be less than 10 quality %.
3. coated manila as claimed in claim 1 or 2, is characterized in that, the calcium carbonate containing in described surface layer is BET specific area 6.0m
2/ g is above, be less than 10.0m
2the precipitated calcium carbonate of/g.
4. coated manila as claimed in claim 1 or 2, is characterized in that, the calcium carbonate containing in described surface layer is to contain that 70 quality % are above, the powdered whiting of the particle below the particle diameter 2 μ m that are less than 95 quality %.
5. the coated manila as described in any one in claim 1～4, is characterized in that, at described surface layer and being arranged in the pigment application layer of facing surface, 60 quality % of contained whole inorganic pigments are calcium carbonate above.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610425234.XA CN105951531B (en) | 2012-07-20 | 2012-07-20 | Coated manila |
| CN201210260036.4A CN103572666B (en) | 2012-07-20 | 2012-07-20 | Coated manila |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210260036.4A CN103572666B (en) | 2012-07-20 | 2012-07-20 | Coated manila |
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| CN105951531A (en) | 2016-09-21 |
| CN105951531B (en) | 2019-06-18 |
| CN103572666B (en) | 2017-12-12 |
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