CN113718556A - Coated paper and preparation method thereof - Google Patents
Coated paper and preparation method thereof Download PDFInfo
- Publication number
- CN113718556A CN113718556A CN202111083525.2A CN202111083525A CN113718556A CN 113718556 A CN113718556 A CN 113718556A CN 202111083525 A CN202111083525 A CN 202111083525A CN 113718556 A CN113718556 A CN 113718556A
- Authority
- CN
- China
- Prior art keywords
- coating
- paper
- pulp
- drying
- coated paper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 60
- 239000011248 coating agent Substances 0.000 claims abstract description 58
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 44
- 238000001035 drying Methods 0.000 claims abstract description 39
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 37
- 229920002472 Starch Polymers 0.000 claims abstract description 25
- 239000008107 starch Substances 0.000 claims abstract description 25
- 235000019698 starch Nutrition 0.000 claims abstract description 25
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 22
- 238000003490 calendering Methods 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 238000004513 sizing Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 14
- 244000166124 Eucalyptus globulus Species 0.000 claims abstract description 13
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 12
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 12
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004816 latex Substances 0.000 claims abstract description 12
- 229920000126 latex Polymers 0.000 claims abstract description 12
- 125000002091 cationic group Chemical group 0.000 claims abstract description 11
- 239000011121 hardwood Substances 0.000 claims abstract description 10
- 239000000314 lubricant Substances 0.000 claims abstract description 10
- 239000005871 repellent Substances 0.000 claims abstract description 10
- 230000002940 repellent Effects 0.000 claims abstract description 10
- 239000011122 softwood Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000000945 filler Substances 0.000 claims abstract description 6
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 5
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 5
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 5
- 230000014759 maintenance of location Effects 0.000 claims abstract description 5
- -1 alkyl ketene dimer Chemical compound 0.000 claims description 12
- 239000000440 bentonite Substances 0.000 claims description 10
- 229910000278 bentonite Inorganic materials 0.000 claims description 10
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 10
- 229920002401 polyacrylamide Polymers 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000011268 mixed slurry Substances 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 claims description 2
- 229920002396 Polyurea Polymers 0.000 claims description 2
- 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 claims description 2
- 239000002174 Styrene-butadiene Substances 0.000 claims description 2
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 2
- 241000276425 Xiphophorus maculatus Species 0.000 claims description 2
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 claims description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 2
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical group [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 2
- 235000013539 calcium stearate Nutrition 0.000 claims description 2
- 239000008116 calcium stearate Substances 0.000 claims description 2
- 239000000839 emulsion Substances 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 239000011115 styrene butadiene Substances 0.000 claims description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 229940014800 succinic anhydride Drugs 0.000 claims description 2
- 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 claims description 2
- 238000007639 printing Methods 0.000 description 27
- 238000007872 degassing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- 238000004537 pulping Methods 0.000 description 5
- 238000007645 offset printing Methods 0.000 description 4
- 241001397809 Hakea leucoptera Species 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 239000008199 coating composition Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011002 quantification Methods 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000021197 fiber intake Nutrition 0.000 description 1
- 238000010002 mechanical finishing Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002699 waste material 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
-
- 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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
- D21H17/29—Starch cationic
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/52—Cellulose; Derivatives thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/54—Starch
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/06—Paper forming aids
- D21H21/10—Retention agents or drainage improvers
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
The application discloses a preparation method of coated paper, which comprises the following steps: mixing the softwood chemical pulp, the hardwood chemical pulp and the eucalyptus chemi-mechanical pulp to obtain mixed pulp; adding auxiliary materials into the mixed pulp, uniformly mixing, wherein the auxiliary materials comprise a filler, a sizing agent, cationic starch and a retention aid, and papermaking is carried out on the mixed pulp uniformly mixed with the auxiliary materials to obtain wet paper; squeezing and first drying the wet paper to obtain coating base paper; coating raw paper with a coating, drying secondarily, and performing calendaring to obtain coated paper, wherein the coating comprises kaolin, heavy calcium carbonate, latex, coating starch, carboxymethyl cellulose, a lubricant and a water repellent agent. The present application also provides a coated paper. The bulk of the coated paper and the preparation method thereof can reach 1.35-1.45cm3The gloss is 5-15 percent, and the requirement of the market on high-bulk light-weight coated paper can be met.
Description
Technical Field
The application relates to the technical field of papermaking, in particular to coated paper and a preparation method thereof.
Background
Lightweight coated paper generally refers to double coated printing paper made with 25% or more mechanical or chemimechanical pulp, generally coated on each side in an amount not exceeding 10g/m2The total amount of the catalyst is generally not more than 70g/m2The paper is a medium-grade coated paper with printing effect between that of uncoated printing paper and that of coated paper. The light-weight coated paper is a new product developed in 80 years from Japan, Europe and America and the like, and the surface coating treatment and mechanical finishing are generally carried out on paper sheets by adopting a method of machine-in coating and machine-in calendering so as to improve the surface performance of the paper sheets.
Compared with uncoated printing paper, the light-weight coated paper obviously improves the printing glossiness of the paper and improves the printability of the paper. The light-weight coated paper is widely used for color printing of high-grade magazines, advertisements, paintings and periodicals, textbooks, leaflets, trademarks, product catalogs and specifications of primary and secondary school students, is developed very quickly, and is a paper type with a relatively high market growth rate.
In the domestic manufacturers for producing light-weight coated paper, most of the used raw materials are chemical pulp, and have certain difference with foreign products in the technical indexes such as paper printing glossiness, printability and the like, particularly the level of coating and calendaring equipment in the machine is not very high, and the product quality cannot be compared with the foreign similar products.
The bulk of the light-weight coated paper on the market is more than 0.85-0.95cm3Between/g. However, low paper quantification is an important trend in the development of printing paper, and the low quantification promotes the demand of the industry for high-bulk printing paper products. The high bulk means that the basis weight of paper can be reduced under a certain thickness, the fiber consumption is reduced, and the purpose of saving cost is achieved; meanwhile, the high bulk can improve the stiffness performance of the printing paper, enable book publishers to maintain the thickness of the whole book with fewer pages, and also increase the opacity and printability of the paper and reduce the strike-through of the printing ink. Therefore, the bulk has important significance on the cost control of the printing paper, the product performance and the added value of the product.
Disclosure of Invention
In order to solve the above technical problems, a first object of the present invention is to provide a method for producing a coated paper; a second object of the present invention is to provide a coated paper; the bulk of the coated paper and the preparation method thereof can reach 1.35-1.45cm3The gloss is 5-15 percent, and the requirement of the market on high-bulk light-weight coated paper can be met.
The technical scheme provided by the invention is as follows:
a method of making coated paper comprising the steps of:
mixing the softwood chemical pulp, the hardwood chemical pulp and the eucalyptus chemi-mechanical pulp to obtain mixed pulp;
adding auxiliary materials into the mixed slurry, and uniformly mixing, wherein the auxiliary materials comprise a filler, a sizing agent, cationic starch and a retention aid;
making the mixed pulp uniformly mixed with the auxiliary materials to obtain wet paper;
squeezing and first drying the wet paper to obtain coating base paper;
coating raw paper with a coating, drying secondarily, and performing calendaring to obtain coated paper, wherein the coating comprises kaolin, heavy calcium carbonate, latex, coating starch, carboxymethyl cellulose, a lubricant and a water repellent agent.
Preferably, the chemical pulp of the softwood, the chemical pulp of the hardwood and the chemical pulp of the eucalyptus are prepared by the following steps in parts by weight: (20-30): (20-30): 40-60), and the sum of the softwood chemical pulp, the hardwood chemical pulp and the eucalyptus chemical pulp is 100 parts by weight;
the freeness of the softwood chemical pulp is 280-320 ml; the freeness of the hardwood chemical pulp is 300-360 ml; the freeness of the eucalyptus chemi-mechanical pulp is 225ml and 275 ml.
Preferably, in the auxiliary materials, the filler is large-particle-size light calcium carbonate, and the average particle size is 3-5 um;
the sizing agent is any one of alkyl ketene dimer, alkenyl succinic anhydride and dispersed rosin size;
the retention aid is polyacrylamide and bentonite.
Preferably, the auxiliary materials are calculated by weight percentage of oven-dried pulp: 20-22% of large-particle-size light calcium carbonate; 0.8-1.5% of alkyl ketene dimer; cationic starch 0.9-1.1%; 0.06-0.08% of polyacrylamide and 0.2-0.4% of bentonite.
Preferably, in the coating, the heavy calcium carbonate is 65-grade coated heavy calcium carbonate, wherein the content of the particle size of-2 um is 63-67%;
the kaolin is platy kaolin;
the latex is carboxylic styrene-butadiene latex;
the coating starch is one of acetate starch or phosphate starch;
the lubricant is calcium stearate emulsion; the water repellent agent is one of polyamide polyurea resin or urea-formaldehyde resin;
in the coating, the dosage of each substance is as follows: 85-95 parts of heavy calcium carbonate, 5-15 parts of kaolin, 10-15 parts of starch, 6-8 parts of latex, 0.4-0.6 part of carboxymethyl cellulose, 0.5-1.0 part of lubricant and 0.5-1.0 part of water repellent agent; the solid content of the coating is 55-60%.
Preferably, the wet paper is pressed to dryness not less than 39% and then subjected to primary drying; during the first drying, the temperature of the drying equipment is controlled to be 90-130 ℃, and the drying is carried out until the dryness is more than or equal to 95%;
and when the coated base paper is dried for the second time, controlling the temperature of the drying equipment to be 40-130 ℃, and drying until the dryness is more than or equal to 93%.
Preferably, when the coating is applied, the coating weight is 6-10g/m2。
Preferably, the temperature of the press rolls is 50-55 ℃ and the linear pressure is 10-15kN/m when calendering.
A coated paper characterized by being produced by any one of the production methods described above.
Preferably, the grammage of the coated paper is 60-70g/m2The whiteness is ISO 81-83%, and the bulk is 1.35-1.45cm3G, gloss 5-15%.
The applicant improves the bulk of the coated paper in the aspects of slurry structure, filler characteristic improvement, beating process and coating process. By adopting a light-weight coating technology, the color printing effect is improved under the condition of ensuring the bulk; the coating formula is researched, so that the problems of weak covering power and insufficient printing color reduction of the traditional light-weight coated paper are solved; a large amount of formula design and optimization experimental research are carried out on the aspects of slurry raw materials and the proportion thereof, pulping process parameter control, coating formula, coating process, equipment and the like, so that the bulk of the preparation method of the coated paper and the prepared coated paper can reach 1.35-1.45cm3The printing paper has the advantages of high gloss of 5-15%, high bulk, smooth and fine surface, high stiffness, high surface strength, accurate overprinting, clear printing pattern, full color and good printing effect, is suitable for high-speed eight-color commercial rotary printing and flat offset printing, can meet the market demand for high-bulk light-weight coated paper, can meet the high-quality printing quality required by customers, and improves the bulk. The high-bulk light-weight coated paper provided by the application has great significance for reducing the quantitative amount of printing paper, improving the utilization rate of fiber resources, reducing energy consumption and reducing the treatment cost of three wastes.
The softwood chemical pulp, hardwood chemical pulp, and eucalyptus chemi-mechanical pulp used in the present application are obtained by conventional pulping methods in the art.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" or "a plurality" means two or more unless specifically limited otherwise.
Example 1
Pulping needle wood chemical pulp (freeness 320ml), broad leaf wood chemical pulp (freeness 350ml) and eucalyptus chemimechanical pulp (freeness 260ml) according to the weight part ratio of 20: 20: blending the slurry according to the proportion of 60 to obtain mixed slurry;
then adding 20% of large-particle-size light calcium carbonate into the mixed slurry, sending the mixed slurry into a first-stage four-section conical slag remover through a fan pump for purifying and removing slag, and then entering a degassing tank for degassing; adding 0.06% of polyacrylamide, 1.0% of cationic starch and 1.2% of alkyl ketene dimer into an inlet of a pressure sieve, and adding 0.25% of bentonite into an outlet of the pressure sieve; wherein, the dosage of the large-particle-size light calcium carbonate, the polyacrylamide, the cationic starch, the alkyl ketene dimer and the bentonite is calculated by the weight percentage of the oven-dried pulp. Then the mixture enters a pressure screen for screening treatment.
Then feeding the paper into a head box to be netted, adjusting the flow rate of netted paper, and controlling the scanned paper ration before sizing to be 62g/m2Left and right; after the wet paper leaves the net part, the wet paper enters a press part for five-roll three-press-area combined pressing, and the wet paper enters a front drying part after being pressed until the dryness is more than or equal to 39%; controlling the surface temperature of a drying cylinder at 90-130 ℃ to carry out first drying treatment on the paper sheet until the dryness of the paper sheet is more than or equal to 95 percent;
then entering a sizing press for coating surface treatment: coating 90 parts by weight of heavy calcium carbonate, 10 parts by weight of flaky kaolin, 15 parts by weight of coating starch, 6 parts by weight of latex, 0.4 part by weight of carboxymethyl cellulose (CMC), 0.5 part by weight of lubricant, 0.5 part by weight of water repellent agent and 55% of solid content of the coating according to 65-grade to prepare the coating; stirring the coating evenly, coating the reverse side of the paper sheet entering from the front drying part by a metering rod type surface sizing machine, and controlling the coating weight to be 6g/m2Then the paper leaves the coating machine and enters a second drying treatment, the temperature of a drying cylinder is controlled to be 40-130 ℃, and the dryness of the paper sheet of the drying part after the paper leaves is more than or equal to 93 percent;
the second dried paper sheet enters a calendering area to carry out calendering treatment on the paper sheet, a calender selects a 1+7 nip, the temperature of a hot roller is 50 ℃, and the linear pressure is 10kN/m and 15kN/m respectively; after calendering, the paper is reeled to obtain the gram weight of 68g/m2Whiteness of 82% ISO, bulk of 1.45cm3The bulk of the product is higher than that of the common light-weight coated paper, and meanwhile, the surface of the paper is smooth and fine, overprinting is accurate, printed patterns are clear, colors are full, the printing effect is good, and the high-bulk light-weight coated paper is suitable for high-speed eight-color commercial rotary printing and sheet offset printing.
Example 2
Pulping needle wood chemical pulp (freeness 300ml), broad leaf wood chemical pulp (freeness 330ml) and eucalyptus chemimechanical pulp (freeness 255ml) according to the weight part ratio of 25: 25: mixing the pulp according to the proportion of 50 to obtain mixed pulp;
then adding 20% of large-particle-size light calcium carbonate into the mixed slurry, sending the mixed slurry into a first-stage four-section conical slag remover through a fan pump for purifying and removing slag, and then entering a degassing tank for degassing; adding 0.06% of polyacrylamide, 1.0% of cationic starch and 1.2% of alkyl ketene dimer into an inlet of a pressure sieve, and adding 0.25% of bentonite into an outlet of the pressure sieve; wherein, the dosage of the large-particle-size light calcium carbonate, the polyacrylamide, the cationic starch, the alkyl ketene dimer and the bentonite is calculated by the weight percentage of the oven-dried pulp.
Then the paper enters a pressure screen for screening treatment, then the paper is sent to a pulp flowing box for net surfing, the net surfing flow is adjusted, and the scanned paper basis weight before sizing is controlled at 60g/m2Left and right; after the wet paper leaves the net part, the wet paper enters a press part for five-roll three-press-area combined pressing, and the wet paper enters a front drying part after being pressed until the dryness is more than or equal to 39%; the surface temperature of the drying cylinder is controlled at 90-130 ℃ to carry out first drying treatment on the paper sheet until the dryness of the paper sheet is more than or equal to 95 percent;
then entering a sizing press for coating surface treatment: coating 90 parts by weight of heavy calcium carbonate, 10 parts by weight of flaky kaolin, 13 parts by weight of coating starch, 7 parts by weight of latex, 0.4 part by weight of carboxymethyl cellulose (CMC), 0.5 part by weight of lubricant, 0.5 part by weight of water repellent agent and 58% of solid content of the coating according to 65-grade to prepare the coating; stirring the coating evenly, coating the reverse side of the paper sheet entering from the front drying part by a metering rod type surface sizing machine, and controlling the coating weight to be 8g/m2Then the paper leaves the coating machine and enters a second drying treatment, the temperature of a drying cylinder is controlled to be 40-130 ℃, and the dryness of the paper sheet of the drying part after the paper leaves is more than or equal to 93 percent; the second dried paper sheet enters a calendering area to carry out calendering treatment on the paper sheet, a calender selects a 1+7 nip, the temperature of a hot roller is 50 ℃, and the linear pressure is 10kN/m and 15kN/m respectively; after calendering, the paper is reeled to obtain the gram weight of 68g/m2Whiteness of 82% ISO, bulk of 1.40cm3The bulk of the product is higher than that of the common light-weight coated paper, and meanwhile, the surface of the paper is smooth and fine, overprinting is accurate, printed patterns are clear, colors are full, the printing effect is good, and the high-bulk light-weight coated paper is suitable for high-speed eight-color commercial rotary printing and sheet offset printing.
Example 3
Pulping needle wood chemical pulp (freeness 280ml), broad leaf wood chemical pulp (freeness 300ml) and eucalyptus chemimechanical pulp (freeness 225ml) according to the weight part ratio of 30: 30: 40 to obtain mixed pulp;
then adding 21% of large-particle-size light calcium carbonate into the mixed slurry, sending the mixed slurry into a first-stage four-section conical slag remover through a fan pump for purifying and removing slag, and then entering a degassing tank for degassing; adding 0.06% of polyacrylamide, 1.0% of cationic starch and 1.2% of alkyl ketene dimer serving as a sizing agent into an inlet of a pressure screen, and adding 0.25% of bentonite into an outlet of the pressure screen; wherein, the dosage of the large-particle-size light calcium carbonate, the polyacrylamide, the cationic starch, the alkyl ketene dimer and the bentonite is calculated by the weight percentage of the oven-dried pulp.
Then the mixture enters a pressure screen for screening treatment. Then feeding the paper into a pulp flowing box to be netted, adjusting the flow rate of netted paper, and controlling the scanned paper ration to be about 58g/m2 before sizing; after the wet paper leaves the net part, the wet paper enters a press part for five-roll three-press-area combined pressing, and the wet paper enters a front drying part after being pressed until the dryness is more than or equal to 39%; the surface temperature of the drying cylinder is controlled at 90-130 ℃ to carry out first drying treatment on the paper sheet until the dryness of the paper sheet is more than or equal to 95 percent;
then entering a sizing press for coating surface treatment: coating 90 parts by weight of heavy calcium carbonate, 10 parts by weight of flaky kaolin, 11 parts by weight of coating starch, 8 parts by weight of latex, 0.4 part by weight of carboxymethyl cellulose (CMC), 0.5 part by weight of lubricant, 0.5 part by weight of water repellent agent and 60% of solid content of the coating according to 65-grade to prepare the coating; stirring the coating evenly, coating the reverse side of the paper sheet entering from the front drying part by a metering rod type surface sizing machine, and controlling the coating weight to be 10g/m2Then the paper leaves the coating machine and enters a second drying treatment, the temperature of a drying cylinder is controlled to be 40-130 ℃, and the dryness of the paper sheet of the drying part after the paper leaves is more than or equal to 93 percent; the second dried paper sheet enters a calendering area to carry out calendering treatment on the paper sheet, a calender selects a 1+7 nip, the temperature of a hot roller is 50 ℃, and the linear pressure is 10kN/m and 15kN/m respectively; after calendering, the paper is reeled to obtain the gram weight of 68g/m2Whiteness of 82% ISO, bulk of 1.35cm3High bulk, light weight coated paper with a gloss of 15%/g, the product being bulkyThe thickness is higher than that of common light-weight coated paper, and meanwhile, the surface of the paper is smooth and fine, the overprinting is accurate, the printing patterns are clear, the color is full, the printing effect is good, and the method is suitable for high-speed eight-color commercial rotary printing and flat offset printing.
Claims (10)
1. A method for preparing coated paper is characterized by comprising the following steps:
mixing the softwood chemical pulp, the hardwood chemical pulp and the eucalyptus chemi-mechanical pulp to obtain mixed pulp;
adding auxiliary materials into the mixed slurry, and uniformly mixing, wherein the auxiliary materials comprise a filler, a sizing agent, cationic starch and a retention aid;
making the mixed pulp uniformly mixed with the auxiliary materials to obtain wet paper;
squeezing and first drying the wet paper to obtain coating base paper;
coating raw paper with a coating, drying secondarily, and performing calendaring to obtain coated paper, wherein the coating comprises kaolin, heavy calcium carbonate, latex, coating starch, carboxymethyl cellulose, a lubricant and a water repellent agent.
2. The preparation method of claim 1, wherein the softwood chemical pulp, hardwood chemical pulp and eucalyptus chemical-mechanical pulp are prepared from the following raw materials in parts by weight: (20-30): (20-30): 40-60), and the sum of the softwood chemical pulp, the hardwood chemical pulp and the eucalyptus chemical pulp is 100 parts by weight;
the freeness of the softwood chemical pulp is 280-320 ml; the freeness of the hardwood chemical pulp is 300-360 ml; the freeness of the eucalyptus chemi-mechanical pulp is 225ml and 275 ml.
3. The preparation method according to claim 1, wherein in the auxiliary materials, the filler is large-particle-size light calcium carbonate with an average particle size of 3-5 um;
the sizing agent is any one of alkyl ketene dimer, alkenyl succinic anhydride and dispersed rosin size;
the retention aid is polyacrylamide and bentonite.
4. The preparation method according to claim 3, wherein the amount of the auxiliary materials is, in weight percent of the oven-dried pulp: 20-22% of large-particle-size light calcium carbonate; 0.8-1.5% of alkyl ketene dimer; cationic starch 0.9-1.1%; 0.06-0.08% of polyacrylamide and 0.2-0.4% of bentonite.
5. The preparation method of claim 1, wherein in the coating, the ground calcium carbonate is 65-grade coated ground calcium carbonate, and the content of the grain diameter-2 um is 63-67%;
the kaolin is platy kaolin;
the latex is carboxylic styrene-butadiene latex;
the coating starch is one of acetate starch or phosphate starch;
the lubricant is calcium stearate emulsion;
the water repellent agent is one of polyamide polyurea resin or urea-formaldehyde resin;
in the coating, the dosage of each substance is as follows: 85-95 parts of heavy calcium carbonate, 5-15 parts of kaolin, 10-15 parts of coating starch, 6-8 parts of latex, 0.4-0.6 part of carboxymethyl cellulose, 0.5-1.0 part of lubricant and 0.5-1.0 part of water repellent; the solid content of the coating is 55-60%.
6. The production method according to claim 1, wherein the wet paper is pressed to a dryness of not less than 39% and subjected to first drying; during the first drying, the temperature of the drying equipment is controlled to be 90-130 ℃, and the drying is carried out until the dryness is more than or equal to 95%;
and when the coated base paper is dried for the second time, controlling the temperature of the drying equipment to be 40-130 ℃, and drying until the dryness is more than or equal to 93%.
7. The method according to claim 1, wherein the amount of the coating material applied is 6 to 10g/m2。
8. The process according to claim 1, wherein the temperature of the press roll is 50 to 55 ℃ and the linear pressure is 10 to 15kN/m when the press roll is pressed.
9. Coated paper, characterized in that it is prepared by the process according to any one of claims 1 to 8.
10. Coated paper according to claim 9, characterized in that the grammage of the coated paper is 60-70g/m2The whiteness is ISO 81-83%, and the bulk is 1.35-1.45cm3G, gloss 5-15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111083525.2A CN113718556A (en) | 2021-09-15 | 2021-09-15 | Coated paper and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111083525.2A CN113718556A (en) | 2021-09-15 | 2021-09-15 | Coated paper and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113718556A true CN113718556A (en) | 2021-11-30 |
Family
ID=78683939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111083525.2A Pending CN113718556A (en) | 2021-09-15 | 2021-09-15 | Coated paper and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113718556A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892445A (en) * | 2022-05-07 | 2022-08-12 | 岳阳林纸股份有限公司 | Special light-weight coated paper for water-based ink digital printing, coating material and application thereof |
| CN116732811A (en) * | 2023-06-12 | 2023-09-12 | 岳阳林纸股份有限公司 | Matte light-weight coated paper and manufacturing process thereof |
| CN116876258A (en) * | 2023-08-18 | 2023-10-13 | 岳阳林纸股份有限公司 | DM single paper manufacturing method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220727A (en) * | 2011-06-09 | 2011-10-19 | 金东纸业（江苏）股份有限公司 | Coated paper and manufacture method thereof |
| CN104805729A (en) * | 2015-04-24 | 2015-07-29 | 岳阳林纸股份有限公司 | Method for producing industrial precoating body paper |
| CN106192552A (en) * | 2016-08-12 | 2016-12-07 | 海南金海浆纸业有限公司 | A kind of high bulk is coated with white kraft paper and preparation method thereof |
| CN106283856A (en) * | 2016-08-26 | 2017-01-04 | 岳阳林纸股份有限公司 | A kind of on-line coater telegraphy paper and manufacture method thereof |
| CN107012738A (en) * | 2017-05-23 | 2017-08-04 | 岳阳林纸股份有限公司 | A kind of manufacture method of high bulk art paper |
| CN107059462A (en) * | 2017-05-23 | 2017-08-18 | 岳阳林纸股份有限公司 | A kind of micro- manufacture method for applying offset paper of high bulk |
| CN112195683A (en) * | 2020-10-09 | 2021-01-08 | 岳阳林纸股份有限公司 | In-machine coated color drawing paper and manufacturing method and application thereof |
-
2021
- 2021-09-15 CN CN202111083525.2A patent/CN113718556A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220727A (en) * | 2011-06-09 | 2011-10-19 | 金东纸业（江苏）股份有限公司 | Coated paper and manufacture method thereof |
| CN104805729A (en) * | 2015-04-24 | 2015-07-29 | 岳阳林纸股份有限公司 | Method for producing industrial precoating body paper |
| CN106192552A (en) * | 2016-08-12 | 2016-12-07 | 海南金海浆纸业有限公司 | A kind of high bulk is coated with white kraft paper and preparation method thereof |
| CN106283856A (en) * | 2016-08-26 | 2017-01-04 | 岳阳林纸股份有限公司 | A kind of on-line coater telegraphy paper and manufacture method thereof |
| CN107012738A (en) * | 2017-05-23 | 2017-08-04 | 岳阳林纸股份有限公司 | A kind of manufacture method of high bulk art paper |
| CN107059462A (en) * | 2017-05-23 | 2017-08-18 | 岳阳林纸股份有限公司 | A kind of micro- manufacture method for applying offset paper of high bulk |
| CN112195683A (en) * | 2020-10-09 | 2021-01-08 | 岳阳林纸股份有限公司 | In-machine coated color drawing paper and manufacturing method and application thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892445A (en) * | 2022-05-07 | 2022-08-12 | 岳阳林纸股份有限公司 | Special light-weight coated paper for water-based ink digital printing, coating material and application thereof |
| CN116732811A (en) * | 2023-06-12 | 2023-09-12 | 岳阳林纸股份有限公司 | Matte light-weight coated paper and manufacturing process thereof |
| CN116876258A (en) * | 2023-08-18 | 2023-10-13 | 岳阳林纸股份有限公司 | DM single paper manufacturing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113718556A (en) | Coated paper and preparation method thereof | |
| LU102253B1 (en) | Method for making of coated two side art paper with high bulk and high gloss | |
| FI101820B (en) | Roll printing paper and process for its manufacture | |
| EP2576900B1 (en) | Method for producing a coated multilayer fibrous web | |
| JP5288062B2 (en) | Non-coated paper and coated paper | |
| JP5332501B2 (en) | Coated paper for printing | |
| CN102864675B (en) | The manufacture method of coated paper for printing | |
| WO2011151238A1 (en) | Method for producing a coated multilayer fibrous web | |
| CN107059462A (en) | A kind of micro- manufacture method for applying offset paper of high bulk | |
| JP2010116646A (en) | Method for producing coated printing paper | |
| CN105672054B (en) | Manila board for red packet paper and preparation method of Manila board for red packet paper | |
| WO2015166426A1 (en) | Process for producing at least one ply of a paper or board and a paper or board produced according to the process | |
| JPH0544192A (en) | Production of lightweight pigment-coated paper | |
| JP5016353B2 (en) | Coated paper for printing | |
| CN107287977B (en) | Manufacturing process of high-speed rotary light-weight coating digital paper | |
| CN113564957B (en) | Preparation process of micro-coated printing paper | |
| CN112160182B (en) | Pizza box facial tissue and preparation method thereof | |
| CN112195683A (en) | In-machine coated color drawing paper and manufacturing method and application thereof | |
| CN116732811A (en) | Matte light-weight coated paper and manufacturing process thereof | |
| JPH07189168A (en) | Bulky paper | |
| JP4961688B2 (en) | Coated paper for offset printing | |
| JP2015110848A (en) | Manufacturing method of coated paper for printing | |
| JP4333015B2 (en) | Matte coated paper | |
| JP4377425B2 (en) | Manufacturing method of fine coated paper | |
| CN106049180A (en) | Preparation method of high-bulk offset paper made from all wood pulp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211130 |
|
| RJ01 | Rejection of invention patent application after publication |