CN114575190A - Preparation method of student exercise book paper capable of efficiently releasing negative oxygen ions - Google Patents
Preparation method of student exercise book paper capable of efficiently releasing negative oxygen ions Download PDFInfo
- Publication number
- CN114575190A CN114575190A CN202210278144.8A CN202210278144A CN114575190A CN 114575190 A CN114575190 A CN 114575190A CN 202210278144 A CN202210278144 A CN 202210278144A CN 114575190 A CN114575190 A CN 114575190A
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- China
- Prior art keywords
- negative oxygen
- coating
- pulp
- parts
- exercise book
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- Pending
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- -1 oxygen ions Chemical class 0.000 title claims abstract description 126
- 239000001301 oxygen Substances 0.000 title claims abstract description 109
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 109
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 79
- 238000000576 coating method Methods 0.000 claims abstract description 79
- 239000000123 paper Substances 0.000 claims description 110
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 66
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 63
- 239000011122 softwood Substances 0.000 claims description 46
- 239000011121 hardwood Substances 0.000 claims description 45
- 239000002002 slurry Substances 0.000 claims description 37
- 239000002131 composite material Substances 0.000 claims description 35
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 33
- 238000002156 mixing Methods 0.000 claims description 32
- 238000004537 pulping Methods 0.000 claims description 24
- 238000010009 beating Methods 0.000 claims description 22
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical class [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 20
- 239000000945 filler Substances 0.000 claims description 19
- 238000004513 sizing Methods 0.000 claims description 17
- 238000001035 drying Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 13
- 239000001254 oxidized starch Substances 0.000 claims description 13
- 235000013808 oxidized starch Nutrition 0.000 claims description 13
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 13
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 13
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 10
- 230000014759 maintenance of location Effects 0.000 claims description 8
- 239000002518 antifoaming agent Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000007822 coupling agent Substances 0.000 claims description 4
- 239000002270 dispersing agent Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000003607 modifier Substances 0.000 claims description 4
- 229920002401 polyacrylamide Polymers 0.000 claims description 4
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 4
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000010297 mechanical methods and process Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- AVBJHQDHVYGQLS-AWEZNQCLSA-N (2s)-2-(dodecanoylamino)pentanedioic acid Chemical compound CCCCCCCCCCCC(=O)N[C@H](C(O)=O)CCC(O)=O AVBJHQDHVYGQLS-AWEZNQCLSA-N 0.000 claims description 2
- 229920001732 Lignosulfonate Polymers 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 229910021536 Zeolite Inorganic materials 0.000 claims description 2
- 238000006136 alcoholysis reaction Methods 0.000 claims description 2
- 150000004645 aluminates Chemical class 0.000 claims description 2
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 claims description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 2
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 2
- 125000000129 anionic group Chemical group 0.000 claims description 2
- VBICKXHEKHSIBG-UHFFFAOYSA-N beta-monoglyceryl stearate Natural products CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims description 2
- 125000002091 cationic group Chemical group 0.000 claims description 2
- IKNAJTLCCWPIQD-UHFFFAOYSA-K cerium(3+);lanthanum(3+);neodymium(3+);oxygen(2-);phosphate Chemical compound [O-2].[La+3].[Ce+3].[Nd+3].[O-]P([O-])([O-])=O IKNAJTLCCWPIQD-UHFFFAOYSA-K 0.000 claims description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 2
- 239000011268 mixed slurry Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229910052590 monazite Inorganic materials 0.000 claims description 2
- 229910052652 orthoclase Inorganic materials 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 2
- 235000011152 sodium sulphate Nutrition 0.000 claims description 2
- 229910052613 tourmaline Inorganic materials 0.000 claims description 2
- 239000011032 tourmaline Substances 0.000 claims description 2
- 229940070527 tourmaline Drugs 0.000 claims description 2
- 239000010457 zeolite Substances 0.000 claims description 2
- 229910021489 α-quartz Inorganic materials 0.000 claims description 2
- 208000003464 asthenopia Diseases 0.000 abstract description 2
- 210000004556 brain Anatomy 0.000 abstract description 2
- 208000001491 myopia Diseases 0.000 abstract description 2
- 230000004379 myopia Effects 0.000 abstract description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 20
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 12
- 229910052710 silicon Inorganic materials 0.000 description 12
- 239000010703 silicon Substances 0.000 description 12
- 238000003490 calendering Methods 0.000 description 11
- 239000013530 defoamer Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 239000002904 solvent Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000002655 kraft paper Substances 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 3
- 239000012855 volatile organic compound Substances 0.000 description 3
- 231100000357 carcinogen Toxicity 0.000 description 2
- 239000003183 carcinogenic agent Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 230000003908 liver function Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 210000001772 blood platelet Anatomy 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000009982 effect on human Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 210000003743 erythrocyte Anatomy 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000003394 haemopoietic effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 208000020016 psychiatric disease Diseases 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004202 respiratory function Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 239000003039 volatile agent 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
-
- 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
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/17—Ketenes, e.g. ketene dimers
-
- 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
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
- D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
- D21H17/45—Nitrogen-containing groups
-
- 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
- D21H17/675—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
- D21H19/385—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
- D21H19/54—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
- D21H19/60—Polyalkenylalcohols; Polyalkenylethers; Polyalkenylesters
-
- 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
- D21H19/64—Inorganic compounds
-
- 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
-
- 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
- D21H21/22—Agents rendering paper porous, absorbent or bulky
- D21H21/24—Surfactants
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Paper (AREA)
Abstract
The invention provides a preparation method of student exercise book paper capable of efficiently releasing negative oxygen ions, which comprises the following indexes: the indexes of the exercise book paper are as follows: the smoothness is averaged for 50-100 s on the front side and the back side; the release amount of negative oxygen ions is 3600-4500/cm3(ii) a The coating weight of the coating is 2-4 g/m2. The negative oxygen ions are applied to the exercise book paper, so that on one hand, the negative oxygen ions can be released, organic volatile matters such as formaldehyde, TVOC and the like in printing ink are inhibited, and the pungent smell of the printing ink is reduced. On the other hand, the content of local negative oxygen ions in the air is improved, so that people can have fresh air when writing or reading, the eye fatigue is relieved, and the myopia is prevented; meanwhile, higher negative oxygen ions can relieve brain fatigue and improve work and learning efficiency.
Description
Technical Field
The invention belongs to the technical field of papermaking, and particularly relates to a preparation method of student exercise book paper capable of efficiently releasing negative oxygen ions.
Background
The exercise book paper is relatively thin paper, the paper sheet of the exercise book paper is relatively soft, and the basis weight is generally 50g/m2～80g/m2In the meantime. Its fibrous tissue is relatively homogeneous, the color is pure white, two sides are smooth, the texture is compact, does not bleed while writing, and the mechanical strength is also relatively great.
Currently, the ink used for printing exercise book paper is mainly solvent-based ink. In the solvent-based ink, the used organic solvent mainly comprises aromatic hydrocarbons, alcohols, ketones, esters and the like, the volatilized organic substances not only pollute the environment, but also are harmful to human bodies, if people touch the solvent-based ink for a long time, the skin is easy to have a chapping symptom, and even the organic solvents can permeate into the skin and blood of the people, reach all parts of the human bodies along with the blood circulation, damage the organs of the human bodies, and cause certain damage to the liver functions of the people after the organic solvents are inhaled into the human bodies.
The negative oxygen ion can concentrate the mind of people, is beneficial to improving the working efficiency of individuals, and can help to improve the sleep and treat mental diseases and the like. After the negative oxygen ions are inhaled into the human body, the lung capacity of the human body can be increased, and the respiratory function of the human body can be effectively improved. In addition, the negative oxygen ions can increase red blood cells and blood platelets, improve the hematopoietic function of the organism, promote the metabolism of the human body, and further have the effects of promoting the growth and development of the organism and the like. In the prior art, negative oxygen ions are applied to wallpaper, but are rarely applied to cultural paper, particularly exercise book paper. The negative oxygen ion powder is a high-density inorganic material, is easy to settle and poor in dispersibility when being used for preparing low-concentration coating, is not suitable for preparing cultural paper by surface coating, and can seriously affect the surface smoothness of the cultural paper and the service performance.
Disclosure of Invention
The invention provides a method for manufacturing exercise book paper beneficial to a human body, aiming at the problem that the student exercise book paper has a lot of ink organic volatile matters. The negative oxygen ions are applied to the exercise book paper, so that on one hand, the negative oxygen ions can be released, organic volatile matters such as formaldehyde and TVOC in printing ink are inhibited, and the pungent smell of the printing ink is reduced. On the other hand, the content of local negative oxygen ions in the air is improved, so that people can have fresh air when writing or reading, the eye fatigue is relieved, and the myopia is prevented; meanwhile, higher negative oxygen ions can relieve brain fatigue and improve work and study efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
use of a negative oxygen ion releasable coating on exercise book paper, said exercise book paper having the following criteria: the smoothness is averaged for 50-100 s on the front side and the back side; the release amount of negative oxygen ions is 3600-4500/cm3(ii) a The coating weight of the coating is 2-4 g/m2。
Preferably, the coating consists of the following components in parts by weight: 70-80 parts of light calcium carbonate, 10-20 parts of modified barium sulfate, 10-20 parts of negative oxygen ion composite material, 180-200 parts of adhesive, 0.5-2 parts of dispersing agent, 0.3-0.8 part of defoaming agent and water until the total mass concentration of the mixture is 20%. The coating can be coated in a trace amount in a surface sizing device, has simple process and convenient operation, and can meet the requirements of good coating adhesion and high paper smoothness. Preferably, the negative oxygen ion composite material consists of the following components in percentage by weight: 75-90% of negative oxygen ion powder and 10-25% of surface modifier.
Preferably, the surface modifier is one or more of titanate coupling agent, silane coupling agent, aluminate coupling agent, fatty alcohol-polyoxyethylene ether sodium sulfate, fatty alcohol-polyoxyethylene ether ammonium sulfate, lauroyl glutamic acid, stearic acid monoglyceride, lignosulfonate and heavy alkylbenzene sulfonate.
Preferably, the negative oxygen ion powder is one or more of tourmaline, monazite, zeolite, medical stone, orthoclase and alpha-quartz stone. The particle diameters of the light calcium carbonate, the modified barium sulfate and the negative oxygen ion powder are less than or equal to 2 mu m.
Preferably, the moisture content of the exercise book paper releasing the negative oxygen ions is 5.9-6.0%; the tightness is 0.8-0.9 g/cm3. The opacity is 81-85%; the formaldehyde volatilization amount is 0.01-0.04 mg/m3(ii) a The volatile amount of TVOC is 0.08-0.20 mg/m3。
The printing ink used for printing the exercise book paper is mainly solvent-based printing ink, the solvent-based printing ink is not environment-friendly, and can volatilize organic matters, and the volatilized organic matters not only can pollute the environment, but also can be harmful to the human body. Two indexes of formaldehyde volatilization amount and TVOC volatilization amount are mainly detected when detecting the organic volatile matters. Wherein, the formaldehyde is colorless and irritant gas, and has irritation effect on human eyes, nose and the like. In the list of carcinogens published by the world health organization international agency for research on cancer, formaldehyde is placed on a list of carcinogens.
Indoor air quality researchers often refer to the indoor organic gaseous substances they sample for analysis as VOCs; the various VOCs measured are collectively referred to as total Volatile organics TVOC (Total Volatile Organic Compounds). The measurement of formaldehyde and TVOC is that a certain amount of printing ink is coated on dictionary paper of 4 x 15cm, and the detection is carried out in a certain closed space by using an air quality detector.
The invention also provides a preparation method of the negative oxygen ion releasing exercise book paper, which comprises the following steps:
(1) respectively pulping the disintegrated native softwood pulp and native hardwood pulp to prepare pulped softwood pulp and hardwood pulp;
(2) preparing 55-70% of softwood pulp and 30-45% of hardwood pulp by mass percent, and uniformly mixing to prepare mixed pulp;
(3) adding filler, retention and filtration aid and alkyl ketene dimer into the mixed slurry, wherein the using amount of the filler is 12-15% of the mass of the slurry, the using amount of the retention and filtration aid is 0.05-0.1% of the mass of the filler, and the using amount of the alkyl ketene dimer is 0.6-0.8% of the mass of the slurry;
(4) a fourdrinier machine is used for papermaking, and the paper is pressed and dehydrated and then enters a front drying part;
(5) coating the dried paper in a surface sizing device in a micro-coating manner;
(6) and (5) secondary drying, press polishing and coiling to obtain the product.
Preferably, the raw softwood pulp in the step (1) is bleached softwood pulp prepared by a chemical method, a semi-chemical method or a chemical-mechanical method. The primary hardwood pulp is bleached hardwood pulp prepared by a chemical method, a semi-chemical method or a chemical-mechanical method. The beating degree of the raw softwood pulp in the step (1) is 60-70 DEG SR; the beating degree of the primary hardwood pulp is 50-65 DEG SR.
Preferably, in the step (2), the content of the softwood pulp is 60-70% by mass, and the content of the hardwood pulp is 30-40% by mass.
Preferably, the filler added in the step (3) is calcium carbonate. More preferably, the calcium carbonate added in the step (3) is ground calcium carbonate. The retention and drainage aid added in the step (3) is a binary retention system consisting of one or two of Cationic Polyacrylamide (CPAM) and Anionic Polyacrylamide (APAM).
Preferably, the pressing in the step (4) adopts a combination of four-roller double pressing and one-roller positive pressing.
Preferably, the surface sizing device in the step (5) is a film transfer sizing device.
Preferably, the negative oxygen ion release amount of the negative oxygen ion composite material in the step (5) is 8000-12000 negative oxygen ion/cm3。
Preferably, the adhesive in the step (5) is one or more of oxidized starch and polyvinyl alcohol. Further preferably, the polyvinyl alcohol has the following indexes: the polymerization degree is 1700-2000, and the alcoholysis degree is 88-99%.
Preferably, the dispersant in the step (5) is one or two of sodium polyacrylate and sodium hexametaphosphate. The defoaming agent is an organic silicon defoaming agent.
The invention has the beneficial effects that:
1. the negative oxygen ion composite material is added into the coating, so that negative oxygen ions which are beneficial to human bodies can be released. And the emission of organic volatile matters in the printing ink can be inhibited, and the current policy requirements of energy conservation, emission reduction and environmental friendliness are met.
2. The coating is prepared by modifying and coating negative oxygen ions and compounding the negative oxygen ions with modified barium sulfate, light calcium carbonate and the like, so that the problems of easy sedimentation and uneven dispersion of the coating containing inorganic particles are solved, the coating can be coated in a micro-scale manner in a surface sizing device, the process is simple, the operation is convenient, and the requirements of good coating adhesion and high paper smoothness can be met; higher concentration coating can also be achieved by film transfer coating.
3. The negative oxygen ion composite material with the particle size less than or equal to 2 mu m and the light calcium carbonate are used in the coating, so that the smoothness of the exercise book paper can be further improved, and the surface is more exquisite.
Detailed description of the invention
The technical solution of the present invention is further described with reference to the following examples, but the scope of the present invention is not limited thereto.
The modified barium sulfate powder in the embodiment of the invention is purchased from Shanyang Oko powder Co., Ltd. The negative oxygen ion composite material is prepared by compounding and coating common commercial negative oxygen ion powder and is ground by grinding equipment until the grain diameter is less than or equal to 2 mu m. Other raw materials are ordinary commercial products unless otherwise specified. The determination of the moisture content of paper and paperboard is described in GB/T451.2-1989; paper and board smoothness is measured in GB/T456-1989; paper and board opacity is measured in GB/T1543-1988; the determination of paper and board moisture is described in GB/T462-1989.
Example 1
A preparation method of exercise book paper releasing negative oxygen ions comprises the following steps:
(1) pulping: respectively pulping the two types of pulp which are crushed, wherein the beating degree of bleached sulfate softwood pulp is 65 DEG SR, and the beating degree of bleached sulfate hardwood pulp is 60 DEG SR, and respectively preparing softwood pulp and hardwood pulp;
(2) uniformly mixing 60% of softwood pulp and 40% of hardwood pulp to prepare mixed pulp;
(3) to the slurry were added 13% (relative to the slurry) of ground calcium carbonate, 0.08% (relative to the filler) CPAM and 0.7% (relative to the slurry) of alkyl ketene dimer.
(4) The wet web is press dewatered and then fed to a pre-dryer section.
(5) The dried paper is coated in trace amount in surface sizing. The formula of the coating comprises the following components in parts by weight: 80 parts of light calcium carbonate, 10 parts of modified barium sulfate, 10 parts of negative oxygen ion composite material, 194 parts of oxidized starch, 0.8 part of PVA-17996 part of sodium hexametaphosphate and 0.5 part of organic silicon defoamer; supplementing water until the total mass concentration of the coating is 20%, and uniformly mixing at a high speed and coating; the coating weight was 3.8g/m2. Wherein the negative oxygen ion composite material is obtained by mixing 80 mass percent of negative oxygen ion powder and 20 mass percent of silane coupling agent.
(6) And drying, calendaring and reeling the wet paper web for the second time to obtain the paper web.
The physical indexes of the exercise book paper prepared in this embodiment are as follows:
| physical index | Example exercise book paper |
| Quantitative (g/m)2) | 50.2 |
| Tightness (g/cm)3) | 0.86 |
| Smoothness front and back average(s) | 68 |
| Opacity (%) | 81.5 |
| Moisture (%) | 5.9 |
| Negative oxygen ion (per/cm)3) | 3800 |
| Formaldehyde (mg/m)3) | 0.032 |
| TVOC(mg/m3) | 0.182 |
Wherein the negative oxygen ion release amount is obtained by placing 15cm x 20cm exercise book paper in a 50L sealed box, standing for 5min, and detecting the content of negative oxygen ions with a negative oxygen ion detector. The detection of the organic volatile matter mainly comprises formaldehyde and TVOC, and the formaldehyde and TVOC are measured by coating 2g of ink on 4 x 15cm exercise book paper, and standing for 30min in a 50L closed box by using an air quality detector for detection. The organic volatiles detected were mainly formaldehyde and TVOC.
Example 2
A preparation method of exercise book paper releasing negative oxygen ions comprises the following steps:
(1) pulping: respectively pulping the two types of pulp which are crushed, wherein the beating degree of bleached sulfate softwood pulp is 65 DEG SR, and the beating degree of bleached sulfate hardwood pulp is 60 DEG SR, and respectively preparing softwood pulp and hardwood pulp;
(2) uniformly mixing 65% of softwood pulp and 35% of hardwood pulp to prepare mixed pulp;
(3) to the slurry was added 13% (with respect to the slurry) of ground calcium carbonate, 0.08% (with respect to the filler) CPAM and 0.8% (with respect to the slurry) of alkyl ketene dimer.
(4) The wet web is press dewatered and then passed to a pre-dryer section.
(5) The dried paper is coated in trace amount in surface sizing. The formula of the coating comprises the following components in parts by weight: 80 parts of light calcium carbonate, 10 parts of modified barium sulfate, 10 parts of negative oxygen ion composite material, 194 parts of oxidized starch, 0.8 part of PVA-17996 part of sodium hexametaphosphate and 0.5 part of organic silicon defoamer. Adding water to the coating concentration of 20%, uniformly mixing at high speed, and coating with a coating weight of 3.8g/m2. Wherein the negative oxygen ion composite material is obtained by mixing 80 mass percent of negative oxygen ion powder and 20 mass percent of silane coupling agent.
(6) And drying, calendaring and reeling the wet paper web for the second time to obtain the paper web.
The physical indexes of the exercise book paper prepared in this embodiment are as follows:
| physical index | Example exercise book paper |
| Quantitative (g/m)2) | 50.5 |
| Tightness (g/cm)3) | 0.85 |
| Smoothness front and back average(s) | 61 |
| Opacity (%) | 81.9 |
| Moisture (%) | 5.9 |
| Negative oxygen ion (per/cm)3) | 3720 |
| Formaldehyde (mg/m)3) | 0.029 |
| TVOC(mg/m3) | 0.176 |
Example 3
A preparation method of exercise book paper releasing negative oxygen ions comprises the following steps:
(1) pulping: respectively pulping the two types of pulp which are crushed, wherein the beating degree of bleached sulfate softwood pulp is 65 DEG SR, and the beating degree of bleached sulfate hardwood pulp is 60 DEG SR, and respectively preparing softwood pulp and hardwood pulp;
(2) uniformly mixing 70% of softwood pulp and 30% of hardwood pulp to prepare mixed pulp;
(3) to the slurry was added 13% (with respect to the slurry) of ground calcium carbonate, 0.08% (with respect to the filler) CPAM and 0.8% (with respect to the slurry) of alkyl ketene dimer.
(4) The wet web is press dewatered and then passed to a pre-dryer section.
(5) The dried paper is coated in trace amount in surface sizing. The formula of the coating comprises the following components in parts by weight: 80 parts of light calcium carbonate, 10 parts of modified barium sulfate, 10 parts of negative oxygen ion composite material, 194 parts of oxidized starch, 0.8 part of PVA-17996 part of sodium hexametaphosphate and 0.5 part of organic silicon defoamer. Supplementing water to the coating concentration of 20%, and uniformly mixing at a high speed and then coating; the coating weight was 3.8g/m2. Wherein the negative oxygen ion composite material is obtained by mixing 80 mass percent of negative oxygen ion powder and 20 mass percent of silane coupling agent.
(6) And drying, calendaring and reeling the wet paper web for the second time to obtain the paper web.
The physical indexes of the exercise book prepared in this embodiment are as follows:
| physical index | Example exercise book paper |
| Quantitative (g/m)2) | 50.4 |
| Tightness (g/cm)3) | 0.83 |
| Smooth front and backAll(s) | 54 |
| Opacity (%) | 82.6 |
| Moisture (%) | 5.8 |
| Negative oxygen ion (per/cm)3) | 3640 |
| Formaldehyde (mg/m)3) | 0.034 |
| TVOC(mg/m3) | 0.179 |
It can be seen from examples 1-3 that as the proportion of bleached kraft softwood pulp increases, the caliper and smoothness of the book decrease, but the opacity increases.
Example 4
A preparation method of exercise book paper releasing negative oxygen ions comprises the following steps:
(1) pulping: pulping the two crushed pulps respectively, wherein the beating degree of bleached sulfate softwood pulp is 65 DEG SR, and the beating degree of bleached sulfate hardwood pulp is 60 DEG SR, and preparing softwood pulp and hardwood pulp respectively;
(2) uniformly mixing 60% of softwood pulp and 40% of hardwood pulp to prepare mixed pulp;
(3) to the slurry was added 13% (with respect to the slurry) of ground calcium carbonate, 0.08% (with respect to the filler) CPAM and 0.8% (with respect to the slurry) of alkyl ketene dimer.
(4) The wet web is press dewatered and then passed to a pre-dryer section.
(5) The dried paper is coated in trace amount in surface sizing. The formula of the coating comprises the following components in parts by weight: 75 parts of light calcium carbonate, 15 parts of modified barium sulfate, 10 parts of negative oxygen ion composite material, 194 parts of oxidized starch, 0.8 part of PVA-17996 part of sodium hexametaphosphate and 0.5 part of organic silicon defoamer. Adding water to the coating concentration of 20%, uniformly mixing at high speed, and coating with a coating weight of 3.8g/m2. Wherein the negative oxygen ion composite material is obtained by mixing 80 mass percent of negative oxygen ion powder and 20 mass percent of silane coupling agent.
(6) And drying, calendaring and reeling the wet paper web for the second time to obtain the paper web.
The physical indexes of the exercise book paper prepared in this embodiment are as follows:
| physical index | Example exercise book paper |
| Quantitative (g/m)2) | 50.3 |
| Tightness (g/cm)3) | 0.86 |
| Smoothness front and back average(s) | 83 |
| Opacity (%) | 82.9 |
| Moisture (%) | 6.0 |
| Negative oxygen ion (per/cm)3) | 3690 |
| Formaldehyde (mg/m)3) | 0.031 |
| TVOC(mg/m3) | 0.169 |
Example 5
A preparation method of exercise book paper releasing negative oxygen ions comprises the following steps:
(1) pulping: respectively pulping the two types of pulp which are crushed, wherein the beating degree of bleached sulfate softwood pulp is 65 DEG SR, and the beating degree of bleached sulfate hardwood pulp is 60 DEG SR, and respectively preparing softwood pulp and hardwood pulp;
(2) uniformly mixing 60% of softwood pulp and 40% of hardwood pulp to prepare mixed pulp;
(3) to the slurry was added 13% (with respect to the slurry) of ground calcium carbonate, 0.08% (with respect to the filler) CPAM and 0.8% (with respect to the slurry) of alkyl ketene dimer.
(4) The wet web is press dewatered and then fed to a pre-dryer section.
(5) The dried paper is coated in trace amount in surface sizing. The formula of the coating comprises the following components in parts by weight: 70 parts of light calcium carbonate, 20 parts of modified barium sulfate, 10 parts of negative oxygen ion composite material, 194 parts of oxidized starch, PVA-17996 parts, 0.8 part of sodium hexametaphosphate and 0.5 part of organic silicon defoamer. Adding water to the coating concentration of 20%, uniformly mixing at high speed, and coating with a coating weight of 3.8g/m2. Wherein the negative oxygen ion composite material is obtained by mixing 80 mass percent of negative oxygen ion powder and 20 mass percent of silane coupling agent.
(6) And drying, calendaring and reeling the wet paper web for the second time to obtain the paper web.
The physical indexes of the exercise book paper prepared in this embodiment are as follows:
| physical index | Example exercise book paper |
| Quantitative (g/m)2) | 50.0 |
| Tightness (g/cm)3) | 0.87 |
| Smoothness front and back average(s) | 99 |
| Opacity (%) | 83.7 |
| Moisture (%) | 5.9 |
| Negative oxygen ion (per cm)3) | 3890 |
| Formaldehyde (mg/m)3) | 0.032 |
| TVOC(mg/m3) | 0.173 |
From examples 1,4 and 5, it can be seen that as the amount of modified barium sulfate is increased, the smoothness and opacity of the exercise book paper are improved. This is because the modified barium sulfate has relatively good suspension stability, and the coating material is uniformly dispersed, and the smoothness obtained is improved. And the modified barium sulfate can improve the opacity of the exercise book paper.
Example 6
A preparation method of exercise book paper releasing negative oxygen ions comprises the following steps:
(1) pulping: respectively pulping the two types of pulp which are crushed, wherein the beating degree of bleached sulfate softwood pulp is 65 DEG SR, and the beating degree of bleached sulfate hardwood pulp is 60 DEG SR, and respectively preparing softwood pulp and hardwood pulp;
(2) uniformly mixing 60% of softwood pulp and 40% of hardwood pulp to prepare mixed pulp;
(3) to the slurry was added 13% (with respect to the slurry) of ground calcium carbonate, 0.08% (with respect to the filler) CPAM and 0.8% (with respect to the slurry) of alkyl ketene dimer.
(4) The wet web is press dewatered and then passed to a pre-dryer section.
(5) The dried paper is coated in trace amount in surface sizing. The formula of the coating comprises the following components in parts by weight: 75 parts of light calcium carbonate, 10 parts of modified barium sulfate, 15 parts of negative oxygen ion composite material, 194 parts of oxidized starch, 0.8 part of PVA-17996 part of sodium hexametaphosphate and 0.5 part of organic silicon defoamer. Adding water to the coating concentration of 20%, uniformly mixing at high speed, and coating with a coating weight of 3.8g/m2. Wherein the negative oxygen ion composite material is obtained by mixing 80 mass percent of negative oxygen ion powder and 20 mass percent of silane coupling agent.
(6) And drying, calendaring and reeling the wet paper web for the second time to obtain the paper web.
The physical indexes of the exercise book paper prepared in this embodiment are as follows:
| physical index | Example exercise book paper |
| Quantitative (g/m)2) | 50.4 |
| Tightness (g/cm)3) | 0.86 |
| Smoothness front and back average(s) | 71 |
| Opacity (%) | 81.7 |
| Moisture (%) | 6.0 |
| Negative oxygen ion (per/cm)3) | 4420 |
| Formaldehyde (mg/m)3) | 0.012 |
| TVOC(mg/m3) | 0.142 |
Example 7
A preparation method of exercise book paper releasing negative oxygen ions comprises the following steps:
(1) pulping: respectively pulping the two types of pulp which are crushed, wherein the beating degree of bleached sulfate softwood pulp is 65 DEG SR, and the beating degree of bleached sulfate hardwood pulp is 60 DEG SR, and respectively preparing softwood pulp and hardwood pulp;
(2) uniformly mixing 60% of softwood pulp and 40% of hardwood pulp to prepare mixed pulp;
(3) to the slurry was added 13% (with respect to the slurry) of ground calcium carbonate, 0.08% (with respect to the filler) CPAM and 0.8% (with respect to the slurry) of alkyl ketene dimer.
(4) The wet web is press dewatered and then passed to a pre-dryer section.
(5) The dried paper is coated in trace amount in surface sizing. The formula of the coating comprises the following components in parts by weight: 70 parts of light calcium carbonate, 10 parts of modified barium sulfate, 20 parts of negative oxygen ion composite material, 194 parts of oxidized starch, 0.8 part of PVA-17996 part of sodium hexametaphosphate and 0.5 part of organic silicon defoamer. Adding water to the coating concentration of 20%, uniformly mixing at high speed, and coating with a coating weight of 3.8g/m2. Wherein the negative oxygen ion composite material is obtained by mixing 80 mass percent of negative oxygen ion powder and 20 mass percent of silane coupling agent.
(6) And drying, calendaring and reeling the wet paper web for the second time to obtain the paper web.
The physical indexes of the exercise book paper prepared in this embodiment are as follows:
| physical index | Example exercise book paper |
| Quantitative (g/m)2) | 50.4 |
| Tightness (g/cm)3) | 0.86 |
| Smoothness front and back average(s) | 71 |
| Opacity (%) | 82.0 |
| Moisture (%) | 5.9 |
| Negative oxygen ion (per/cm)3) | 4890 |
| Formaldehyde (mg/m)3) | 0.011 |
| TVOC(mg/m3) | 0.091 |
As can be seen from examples 1,6 and 7, with the increase of the dosage of the negative oxygen ion composite material, the negative oxygen ion release amount of the exercise book paper is increased, and the formaldehyde and TVOC contents of the exercise book paper are obviously reduced, which shows that the addition of the negative oxygen ion composite material has an inhibiting effect on organic volatile matters in the ink and reduces pollution. The opacity also increased, indicating that the oxygen anion composite used was able to increase the opacity.
Comparative example 1
A preparation method of exercise book paper releasing negative oxygen ions comprises the following steps:
(1) pulping: pulping the disintegrated bleached sulfate softwood pulp to 60 DEG SR to prepare softwood pulp.
(2) To the slurry was added 13% (with respect to the slurry) of ground calcium carbonate, 0.08% (with respect to the filler) CPAM and 0.8% (with respect to the slurry) of alkyl ketene dimer.
(3) The wet web is press dewatered and then passed to a pre-dryer section.
(4) Drying the paper on the surfaceAnd micro coating is carried out in sizing. The formula of the coating comprises the following components in parts by weight: 80 parts of light calcium carbonate, 10 parts of modified barium sulfate, 10 parts of negative oxygen ion composite material, 194 parts of oxidized starch, 0.8 part of PVA-17996 part of sodium hexametaphosphate and 0.5 part of organic silicon defoamer. Adding water to the coating concentration of 20%, uniformly mixing at high speed, and coating with a coating weight of 3.8g/m2. Wherein the negative oxygen ion composite material is obtained by mixing 80 mass percent of negative oxygen ion powder and 20 mass percent of silane coupling agent.
(5) And drying, calendaring and reeling the wet paper web for the second time to obtain the paper web.
The physical indexes of the prepared exercise book paper are as follows:
comparative example 2
A preparation method of exercise book paper releasing negative oxygen ions comprises the following steps:
(1) pulping: pulping the disintegrated bleached sulfate hardwood pulp to 60 DEG SR to prepare hardwood pulp.
(2) To the slurry was added 13% (with respect to the slurry) of ground calcium carbonate, 0.08% (with respect to the filler) CPAM and 0.8% (with respect to the slurry) of alkyl ketene dimer.
(3) The wet web is press dewatered and then passed to a pre-dryer section.
(4) The dried paper is coated in a trace amount in surface sizing. The formula of the coating comprises the following components in parts by weight: 80 parts of light calcium carbonate, 10 parts of modified barium sulfate, 10 parts of negative oxygen ion composite material, 194 parts of oxidized starch, 0.8 part of PVA-17996 part of sodium hexametaphosphate and 0.5 part of organic silicon defoamer. Adding water to the coating concentration of 20%, uniformly mixing at high speed, and coating with a coating weight of 3.8g/m2. Wherein the negative oxygen ion composite material consists of80 percent of negative oxygen ion powder and 20 percent of silane coupling agent.
(5) And (4) drying, calendering and coiling the wet paper web for the second time to obtain the finished product.
The physical indexes of the prepared exercise book paper are as follows:
it can be seen from example 1 and comparative examples 1 and 2 that the reduction in the tightness and smoothness of the practice book paper is significant but the opacity is increased by using bleached kraft softwood pulp alone. Only bleached kraft hardwood pulp was used, the tightness and smoothness of the exercise book paper increased, but the opacity decreased significantly.
Comparative example 3
A preparation method of exercise book paper releasing negative oxygen ions comprises the following steps:
(1) pulping: respectively pulping the two types of pulp which are crushed, wherein the beating degree of bleached sulfate softwood pulp is 65 DEG SR, and the beating degree of bleached sulfate hardwood pulp is 60 DEG SR, and respectively preparing softwood pulp and hardwood pulp;
(2) uniformly mixing 60% of softwood pulp and 40% of hardwood pulp to prepare mixed pulp;
(3) to the slurry was added 13% (with respect to the slurry) of ground calcium carbonate, 0.08% (with respect to the filler) CPAM and 0.8% (with respect to the slurry) of alkyl ketene dimer.
(4) The wet web is press dewatered and then passed to a pre-dryer section.
(5) The dried paper is coated in trace amount in surface sizing. The formula of the coating comprises the following components in parts by weight: 90 parts of light calcium carbonate, 10 parts of negative oxygen ion composite material, 194 parts of oxidized starch, PVA-17996 parts, 0.8 part of sodium hexametaphosphate and 0.5 part of organic silicon defoaming agent. Replenishing water to the concentration of 20 percent of the coating, uniformly mixing at high speed, and coating, wherein the coating weight is 3.8g/m2. Wherein the negative oxygen ion composite material is obtained by mixing 80 mass percent of negative oxygen ion powder and 20 mass percent of silane coupling agent.
(6) And drying, calendaring and reeling the wet paper web for the second time to obtain the paper web.
The physical indexes of the prepared exercise book paper are as follows:
as can be seen from example 1 and comparative example 3, the opacity and smoothness of the exercise book paper can be improved by adding the modified barium sulfate.
Comparative example 4
A preparation method of exercise book paper releasing negative oxygen ions comprises the following steps:
(1) pulping: respectively pulping the two types of pulp which are crushed, wherein the beating degree of bleached sulfate softwood pulp is 65 DEG SR, and the beating degree of bleached sulfate hardwood pulp is 60 DEG SR, and respectively preparing softwood pulp and hardwood pulp;
(2) uniformly mixing 60% of softwood pulp and 40% of hardwood pulp to prepare mixed pulp;
(3) to the slurry was added 13% (with respect to the slurry) of ground calcium carbonate, 0.08% (with respect to the filler) CPAM and 0.8% (with respect to the slurry) of alkyl ketene dimer.
(4) The wet web is press dewatered and then passed to a pre-dryer section.
(5) The dried paper is coated in trace amount in surface sizing. The formula of the coating comprises the following components in parts by weight: 90 parts of light calcium carbonate, 10 parts of modified barium sulfate, 194 parts of oxidized starch, PVA-17996 parts of sodium hexametaphosphate and 0.5 part of organic silicon defoaming agent. Supplementing water to 20 percent of the coating concentrationUniformly mixing at high speed, and coating at a coating weight of 3.8g/m2. Wherein the negative oxygen ion composite material is obtained by mixing 80 mass percent of negative oxygen ion powder and 20 mass percent of silane coupling agent.
(6) And drying, calendaring and reeling the wet paper web for the second time to obtain the paper web.
The physical indexes of the prepared exercise book paper are as follows:
| physical index | Example exercise book paper |
| Quantitative determination (g/m)2) | 50.0 |
| Tightness (g/cm)3) | 0.87 |
| Smoothness front and back average(s) | 71 |
| Opacity (%) | 81.4 |
| Moisture (%) | 6.2 |
| Negative oxygen ion (per/cm)3) | 20 |
| Formaldehyde (mg/m)3) | 0.093 |
| TVOC(mg/m3) | 0.621 |
As can be seen from the examples 1 and the comparative examples 4, the addition of the negative oxygen ion composite material can inhibit the release amount of formaldehyde and TVOC in the exercise book paper, reduce the possibility of skin chapping caused by long-term contact with ink, damage the organs of the human body, and cause certain damage to the liver function of the human body after being inhaled into the human body. According to the technical scheme, the modified nano barium sulfate and negative oxygen ion composite material is added, so that the smoothness and the surface fineness of the exercise book paper are improved, and the generation of organic volatile matters is inhibited. Meanwhile, the indexes are further balanced by modes of proportioning softwood pulp and hardwood pulp, squeezing, micro-coating and the like.
Comparative example 5
The preparation method of the exercise book paper capable of releasing the negative oxygen ions is different from the embodiment 1 in that the negative oxygen ion powder is not coated, and the negative oxygen ion powder is directly added into the coating formula. As a result, the coating material has poor coating uniformity and the finished paper has reduced opacity and smoothness.
The physical indexes of the prepared exercise book paper are as follows:
| physical index | Example exercise book paper |
| Quantitative (g/m)2) | 50.1 |
| Tightness (g/cm)3) | 0.79 |
| Smoothness front and back average(s) | 24 |
| Opacity (%) | 71 |
| Moisture (%) | 6.0 |
| Negative oxygen ion (per/cm)3) | 3500 |
| Formaldehyde (mg/m)3) | 0.031 |
| TVOC(mg/m3) | 0.167 |
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the embodiments, and any other changes, modifications, combinations, substitutions and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.
Claims (10)
1. Use of a negative oxygen ion releasable coating on exercise book paper, wherein the exercise book paper has the following criteria: the smoothness is averaged for 50-100 s on the front side and the back side; the release amount of negative oxygen ions is 3600-4500/cm3(ii) a The coating weight of the coating is 2-4 g/m2。
2. The use according to claim 1, wherein the coating consists of the following components in parts by weight: 70-80 parts of light calcium carbonate, 10-20 parts of modified barium sulfate, 10-20 parts of negative oxygen ion composite material, 180-200 parts of adhesive, 0.5-2 parts of dispersing agent, 0.3-0.8 part of defoaming agent and water until the total mass concentration of the mixture is 20%.
3. The use according to claim 1, wherein the negative oxygen ion composite material consists of the following components in parts by weight: 75-90% of negative oxygen ion powder and 10-25% of surface modifier;
preferably, the surface modifier is one or more of titanate coupling agent, silane coupling agent, aluminate coupling agent, fatty alcohol-polyoxyethylene ether sodium sulfate, fatty alcohol-polyoxyethylene ether ammonium sulfate, lauroyl glutamic acid, stearic acid monoglyceride, lignosulfonate and heavy alkylbenzene sulfonate;
preferably, the negative oxygen ion powder is one or more of tourmaline, monazite, zeolite, medical stone, orthoclase and alpha-quartz stone.
4. The application of claim 1, wherein the water content of the exercise book paper is 5.9-6.0%; the tightness is 0.8-0.9 g/cm3(ii) a The opacity is 81-85%; the formaldehyde volatilization amount is 0.01-0.04 mg/m3(ii) a The volatile amount of TVOC is 0.08-0.20 mg/m3。
5. The method of making exercise book paper according to any one of claims 1 to 4, wherein the method of making exercise book paper comprises the steps of:
(1) pulping the crushed native softwood pulp and native hardwood pulp respectively to prepare pulped softwood pulp and hardwood pulp;
(2) preparing 55-70% of softwood pulp and 30-45% of hardwood pulp by mass percent, and uniformly mixing to prepare mixed pulp;
(3) adding filler, retention and filtration aid and alkyl ketene dimer into the mixed slurry, wherein the using amount of the filler is 12-15% of the mass of the slurry, the using amount of the retention and filtration aid is 0.05-0.1% of the mass of the filler, and the using amount of the alkyl ketene dimer is 0.6-0.8% of the mass of the slurry;
(4) making paper by using a fourdrinier machine, squeezing and dehydrating, and then entering a front drying part;
(5) coating the dried paper in a surface sizing device in a micro-coating manner by using a coating;
(6) and (5) secondary drying, press polishing and coiling to obtain the product.
6. The method according to claim 5, wherein the raw softwood pulp in step (1) is a bleached softwood pulp produced by a chemical or semi-chemical or chemimechanical process; the primary hardwood pulp is bleached hardwood pulp prepared by a chemical method, a semi-chemical method or a chemical-mechanical method.
Preferably, the beating degree of the raw softwood pulp in the step (1) is 60-70 DEG SR; the beating degree of the primary hardwood pulp is 50-65 DEG SR.
7. The preparation method according to claim 5, characterized in that the softwood pulp in the step (2) is 60-70% by mass, and the hardwood pulp is 30-40% by mass.
8. The method according to claim 5, wherein the filler added in the step (3) is calcium carbonate.
Preferably, the calcium carbonate added in the step (3) is ground calcium carbonate.
Preferably, the retention and drainage aid added in the step (3) is a binary retention system consisting of one or two of cationic polyacrylamide and Anionic Polyacrylamide (APAM).
9. The method of claim 5, wherein the pressing in the step (4) is performed by a combination of a four-roll double pressing and a single forward pressing.
10. The method according to claim 5, wherein the oxygen anion of the oxygen anion composite in the step (5)The sub-release amount is 8000-12000/cm3。
Preferably, the adhesive in the step (5) is one or more of oxidized starch and polyvinyl alcohol; further preferably, the polyvinyl alcohol has the following indexes: the polymerization degree is 1700-2000, and the alcoholysis degree is 88-99%.
Preferably, the dispersant in the step (5) is one or two of sodium polyacrylate and sodium hexametaphosphate.
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| CN114108377A (en) * | 2021-12-02 | 2022-03-01 | 齐鲁工业大学 | Preparation method of environment-friendly dictionary paper |
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| CN111691229A (en) * | 2020-06-19 | 2020-09-22 | 齐鲁工业大学 | Negative ion electrostatic dust removal paper base paper and preparation method thereof |
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