CN106368030A - Method for preparing food packaging paper through hemp core stalk total chloride-free bleached pulp - Google Patents
Method for preparing food packaging paper through hemp core stalk total chloride-free bleached pulp Download PDFInfo
- Publication number
- CN106368030A CN106368030A CN201610830542.0A CN201610830542A CN106368030A CN 106368030 A CN106368030 A CN 106368030A CN 201610830542 A CN201610830542 A CN 201610830542A CN 106368030 A CN106368030 A CN 106368030A
- Authority
- CN
- China
- Prior art keywords
- paper pulp
- pulp
- bleaching
- slurry
- paper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 60
- 235000013305 food Nutrition 0.000 title claims abstract description 51
- 244000025254 Cannabis sativa Species 0.000 title claims abstract description 38
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 title claims abstract description 38
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 title claims abstract description 38
- 235000009120 camo Nutrition 0.000 title claims abstract description 38
- 235000005607 chanvre indien Nutrition 0.000 title claims abstract description 38
- 239000011487 hemp Substances 0.000 title claims abstract description 38
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 37
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 147
- 238000004061 bleaching Methods 0.000 claims abstract description 86
- 239000000835 fiber Substances 0.000 claims abstract description 40
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 239000002002 slurry Substances 0.000 claims description 94
- 239000000123 paper Substances 0.000 claims description 55
- 238000005406 washing Methods 0.000 claims description 39
- 230000008569 process Effects 0.000 claims description 37
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 claims description 32
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 32
- 238000003756 stirring Methods 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 28
- 239000001301 oxygen Substances 0.000 claims description 28
- 229910052760 oxygen Inorganic materials 0.000 claims description 28
- 239000012153 distilled water Substances 0.000 claims description 20
- 239000001913 cellulose Substances 0.000 claims description 18
- 239000003223 protective agent Substances 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 15
- 229920002472 Starch Polymers 0.000 claims description 13
- 235000019698 starch Nutrition 0.000 claims description 13
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 12
- 239000000460 chlorine Substances 0.000 claims description 12
- 239000008107 starch Substances 0.000 claims description 12
- 229910052801 chlorine Inorganic materials 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 11
- 239000007844 bleaching agent Substances 0.000 claims description 10
- 229920002678 cellulose Polymers 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 7
- 239000012752 auxiliary agent Substances 0.000 claims description 7
- 125000002091 cationic group Chemical group 0.000 claims description 7
- 230000009920 chelation Effects 0.000 claims description 7
- 239000001117 sulphuric acid Substances 0.000 claims description 7
- 235000011149 sulphuric acid Nutrition 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 claims description 6
- 239000003814 drug Substances 0.000 claims description 6
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 claims description 6
- 229940048086 sodium pyrophosphate Drugs 0.000 claims description 6
- 238000010025 steaming Methods 0.000 claims description 6
- 235000019818 tetrasodium diphosphate Nutrition 0.000 claims description 6
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 6
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 4
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- -1 alkyl ketene dimer Chemical compound 0.000 claims description 3
- 239000004115 Sodium Silicate Substances 0.000 claims description 2
- 238000010009 beating Methods 0.000 claims description 2
- 239000012467 final product Substances 0.000 claims description 2
- 239000004519 grease Substances 0.000 claims description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 2
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 2
- 238000004078 waterproofing Methods 0.000 claims description 2
- 241000218236 Cannabis Species 0.000 description 9
- 238000010411 cooking Methods 0.000 description 9
- 238000012216 screening Methods 0.000 description 8
- 239000003153 chemical reaction reagent Substances 0.000 description 7
- 238000009897 hydrogen peroxide bleaching Methods 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 4
- 238000004821 distillation Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 239000000284 extract Substances 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 3
- 150000004056 anthraquinones Chemical class 0.000 description 3
- 235000014633 carbohydrates Nutrition 0.000 description 3
- 150000001720 carbohydrates Chemical class 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- 238000004076 pulp bleaching Methods 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 235000008098 Oxalis acetosella Nutrition 0.000 description 1
- 241001119522 Paullinia pinnata Species 0.000 description 1
- 235000010240 Paullinia pinnata Nutrition 0.000 description 1
- 235000005018 Pinus echinata Nutrition 0.000 description 1
- 241001236219 Pinus echinata Species 0.000 description 1
- 235000017339 Pinus palustris Nutrition 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 235000013877 carbamide Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 229910001902 chlorine oxide Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000002761 deinking Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 235000011167 hydrochloric acid Nutrition 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 235000019794 sodium silicate Nutrition 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000002351 wastewater 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
- D21H27/10—Packing paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
- D21C3/022—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes in presence of S-containing compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
- D21C3/026—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes in presence of O2, e.g. air
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1026—Other features in bleaching processes
- D21C9/1042—Use of chelating agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
-
- 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
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
-
- 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
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
- D21H15/10—Composite fibres
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
The invention discloses a method for preparing food packaging paper through hemp core stalk total chloride-free bleached pulp. Hemp core stalk is adopted as a raw material to prepare chemical pulp, then TCF bleaching is carried out to prepare the bleached pulp, and finally the bleached pulp and part of proportional long-fiber market pulp plates are blended to prepare the food packaging paper. The common food packaging paper prepared through the hemp core stalk TCF bleached pulp meets the industrial standard (QBT 1014-2010).
Description
Technical field
The invention belongs to non-wood raw material prepares food wrapper technical field, particularly to a kind of hemp's woody-core completely without chlorine
(tcf) method that bleached pulp prepares Food Packaging Paper.
Background technology
With the fast development of food processing industry, the packaging being used also increasingly increases, and packaging for foodstuff is directly connect with food
Touch, its package materials selection whether appropriate, be directly connected to the healthy of people.And in terms of development trend, paper wrapper
Consumption will be increasing, expand paper grade (stock) raw material resources cultivar origin seem extremely important.Fiber with Fructus Cannabiss Cortex Cannabis is
Papermaking, the primary raw material of textile industry, and Fructus Cannabiss go core-skin stalk to be then belonging to papermaking, the clout of textile industry raw material.Fructus Cannabiss are tough
From the point of view of skin zone is with regard to chemical analysis and fibre morphology, high-quality high-grade of manufacturing paper with pulp out paper and speciality paper are reasonable, and it is also
There is necessarily antibacterial and antibacterial ability, and its core stalk is short and small due to its fiber, and the shortcoming containing some heteroproteose cells, as
Paper making raw material development be subject to certain restricting, but it is done clout be developed still significant.And paper pulp makes
With being not only the requirement of environmental conservation instantly completely without chlorine (tcf) bleaching, it is also the guarantee further of food wrapper safety.Its
It is entirely free of elemental chlorine in the drift agent of association with pulp bleaching, completely using agent containing oxygen bleaching, be inherently eliminated the harm of organochlorine.But
It is that often viscosity degradation is more for the tcf bleaching commonly used at present, and loss of strength is larger.
Content of the invention
Present invention aim at providing a kind of method that hemp's woody-core prepares food wrapper completely without chlorine (tcf) bleached pulp,
Food Packaging Paper standard (qbt 1014-2010) is reached using the Food Packaging Paper that the method is obtained.
The present invention is prepared in Food Packaging Paper method, is with hemp's woody-core as raw material, after conventional chemical methods slurrying,
Using oxygen delignification's bleaching technology (o), chelation treatment technology (q), peracetic acid bleaching technology (pa) and two sections of hydrogen peroxide
The oqpapp multistage bleaching technique that bleaching technology (pp) forms, carries out bleaching and bleached pulp is obtained to chemical pulp；Bleached pulp
Join with commercially available long fibre tcf bleached pulp after material washing and copy, and add auxiliary agent, make bread and cheese bag using small-sized fourdrinier paper machine
Dress paper.
The method that hemp's woody-core tcf bleached pulp of the present invention prepares Food Packaging Paper is carried out according to step in detail below,
In literary composition, percentage ratio is mass percent, and in bleaching process, the consumption of each section of reagent is all with the paper pulp over dry matter before oxygen delignification
Amount is calculated, and in paper-making process, the consumption of each section of reagent is all calculated with paper pulp absolute dry mass after bleaching:
(1) carried out after conventional chemistry slurrying for raw material with hemp's woody-core, hemp's woody-core chemical pulp oxygen delignification is processed:
Pulp density is naoh, the bleaching of paper pulp absolute dry mass 1-3% adding paper pulp absolute dry mass 2.0-3.0% in 8%-12% paper pulp
Auxiliary agent na2sio3Cellulose protective agent mgso with paper pulp absolute dry mass 0.4-0.8%4, after stirring temperature be 100 DEG C,
Oxygen pressure is process 60min under the conditions of 0.4-0.6mpa, processes disposed slurry and is washed to ph=6.5 ~ 7.5 with clear water；
(2) chelation treatment: adjust oxygen delignification's disposed slurry ph value to 3.0-7.0 with sulphuric acid or hydrochloric acid, and in pulp density be
Add diethylene triamine pentacetic acid (DTPA) (dtpa) or the ethylenediaminetetraacetic acid of paper pulp absolute dry mass 0.3-0.8% in the paper pulp of 6-12%
(edta) process 30-60min after, stirring at temperature 70-90 DEG C；
(3) slurry after step (2) is processed is washed with distilled water to ph=6.5 ~ 7.5；
(4) step (3) is washed disposed slurry and carry out peracetic acid bleaching；
(5) slurry that step (4) was processed is washed with distilled water to ph=6.5 ~ 7.5；
(6) step (5) is washed disposed slurry and carry out hydrogen peroxide two-stage bleaching, between two sections, all use distilled water afterwards with two sections
Wash to ph=6.5 ~ 7.5, obtain final product paper pulp after bleaching；
(7) paper pulp after step (6) bleaching is joined with commercially available long fibre tcf bleached pulp and copy, and add auxiliary agent, copied using small-sized fourdrinier wire
Food Packaging Paper made by paper machine.
The requirement of whiteness and strength character according to needed for finally copied Food Packaging Paper, step (4), step (6)
Bleaching condition can be adjusted, and the copy paper condition of step (7) can be adjusted.Above-mentioned steps (4) peracetic acid bleaching section (pa)
Process conditions are: wash disposed slurry starting ph 3-7 with naoh regulating step (2)；In pulp density in the paper pulp of 8%-12%
Add the stabilizer sodium pyrophosphate of peracetic acid and the ch of 0.6-1.2% of paper pulp absolute dry mass 0.05-0.15%3Coooh(is with work
Property oxygen ao metering), after stirring at temperature 60-80 DEG C bleach 60-120min.
Above-mentioned steps (6) hydrogen peroxide bleaching section (p) process conditions are: washed at the beginning of disposed slurry with naoh regulating step (3)
Beginning ph value, to 10.5-11.5, adds the h of paper pulp absolute dry mass 1.5-2.0% in the paper pulp for 8-12% for the slurry concentration2o2, 1-3%
Bleaching assistant na2sio3Cellulose protective agent mgso with 0.2-0.8%4, at temperature 70-90 DEG C, after stirring, bleach 120-
180min, is washed with distilled water to ph=6.5-7.5 after first paragraph drift；After washing again with naoh adjust paper pulp starting ph to
10.5-11.5, adds the h of paper pulp absolute dry mass 1.0-1.5% in the paper pulp for 8-12% for the slurry concentration2o2, the bleaching assistant of 1-3%
na2sio3Cellulose protective agent mgso with 0.2-0.8%4, at temperature 70-90 DEG C, after stirring, bleach 120-180min.
After above-mentioned steps (7) bleaching, paper pulp and commercial goods long fibre tcf bleached pulp join the work copying Food Packaging Paper
Skill condition is: after step (6) is bleached paper pulp and commodity long fibre tcf bleached pulp respectively defibrination to 50-70oSr, identical
Under the premise of beating degree, long fibre tcf bleached pulp presses 15-30%(with respect to total oven dry stock quality, that is, paper pulp and long fibre after bleaching
The absolute dry mass of tcf bleached pulp total amount) carry out proportioning mixing；After mixing, slurry is broken up, make slurry dense for 2g/l, sequentially add paper
The cationic starch of slurry absolute dry mass 1.0-2.0%, the alkyl ketene dimer (akd) of paper pulp absolute dry mass 0.2-0.3%, paper pulp
The PAMC (cpam) of absolute dry mass 0.02-0.04%, paper pulp absolute dry mass 0.2-0.6% shitosan, paper pulp are exhausted
Dry mass 0.02-0.05% grease-proof and waterproof agent；Every kind of medicament and slurry mix and blend time 5-15min, fully stir during dosing
Mix and break up；Plus the slurry of good auxiliary agent will make Food Packaging Paper using small-sized fourdrinier paper machine as early as possible.
Reagent no specified otherwise in the present invention, is commercially available conventional reagent, the diethylene triamine pentacetic acid (DTPA) of use, second two
The reagent such as amine tetraacethyl, peracetic acid, hydrogen peroxide, sodium hydroxide, sodium silicate, magnesium sulfate, sulphuric acid, hydrochloric acid are to analyze pure examination
Agent.
When auxiliary agent in step (7) uses, can be configured to solution and add, the such as sun of mass percent concentration 0.5% from
Sub- starch solution, 1%akd emulsion, 0.1% cpam, 5% shitosan, 5% grease-proof and waterproof agent；Wherein grease-proof and waterproof agent is conventional commercial
For food wrapper preparation in additive.
The present invention is with respect to the advantage of prior art:
(1) pass through the present invention to technical process effective control, make the universal inferior position of the properties such as fiber in the fiber of wood raw material
With hemp's woody-core in order to environmental conservation and food safety are using more cleaning, but there is certain loss to physical property of pulp
On the premise of tcf method for bleaching, simultaneously with addition of the tcf long fibre market pulp board of less ratio, prepare Food Packaging Paper
This functional high quality paper kind；
(2) hemp's woody-core chemical pulp adopts tcf method for bleaching, the drift agent peracetic acid of use and hydrogen peroxide to be environment-friendly type drift
White agent, has certain protective effect: peracetic acid bleaching environment is near-neutral sulfite deinking, and peroxide simultaneously to the strength character of slurry
Acetic acid is a kind of strong oxidizer, and its normal reduction potential and chlorine and chlorine dioxide quite, and are higher than the peroxidating in alkaline medium
Hydrogen and oxygen, have stronger delignification's effect, and bleach and to the especially follow-up hydrogen peroxide bleaching of following bleaching
" activation " acts on, and while delignification, viscosity loss is less, protects the strength character of fiber；And its catabolite is
Acetic acid and oxygen, environmental sound.And hydrogen peroxide for association with pulp bleaching have easy to use, drift after pulp brightness good stability, work
Many advantages, such as skill strong adaptability, contaminated wastewater are light, itself oxidisability is relatively mild, and reacting with carbohydrate only makes it damage
Lose less viscosity；And finally using two sections of hydrogen peroxide bleachings, enter one by the control of technique while improving whiteness
The loss of step protection carbohydrate.Agent and the cooperation of oxygen and chelating agen are floated by both, protects Fructus Cannabiss as far as possible
The physical strength of core stalk tcf bleached pulp.
In a word, hemp's woody-core chemical pulp is using first by oxygen delignification, then coordinates the process of peracetic acid and two sections
The terminal section bleaching of hydrogen peroxide, it is contemplated that in delignification as far as possible and guarantor on the premise of environmental friendliness and food safety
While shield carbohydrate, paper pulp is made to reach high whiteness and the target of better quality in shorter driftage.Again pass through with addition of
The tcf long fibre pulpboard commodity of less ratio, can prepare this functional high quality paper kind of Food Packaging Paper, adopt
With the Food Packaging Paper that the inventive method is obtained, there is whiteness height, the good feature of intensity, paper meets industry standard (qbt
1014-2010).
Specific embodiment
Below by embodiment the invention will be further described explanation, but the scope of the present invention be not limited to described interior
Hold, grease-proof and waterproof agent used in embodiment is food stage c6 grease-proof and waterproof agent (Daikin), the commodity long fibre tcf of use
Bleached pulp starches (U.S.'s Southern Pine) for bleached softwood wooden chemistry, but is not limited to using the type product.All percentages in embodiment
Ratio is mass percent, in terms of in bleaching process, the consumption of each section of reagent is all carried out by the paper pulp absolute dry mass before oxygen delignification
Calculate, in paper-making process, the consumption of each section of reagent is all calculated with paper pulp absolute dry mass after bleaching:
Embodiment 1: the method that this hemp's woody-core tcf bleached pulp prepares Food Packaging Paper, particular content is as follows:
In embodiment, hemp's woody-core tcf bleached pulp is with the hemp's woody-core divesting Cortex Cannabis as raw material, for being about the one-tenth section of 3-5cm
Xylem core；Raw material carries out alkali-AQ pulping through screening in zql type electric cooking pot, and conditions of cooking is: liquor ratio 1:
4, alkali charge 20%(is in terms of naoh), then add the anthraquinone of paper pulp absolute dry mass 0.15%, use 30min after digester idle running 10min
Rise to 85 DEG C from initial temperature, then rise to 165 DEG C with 100min, and be incubated 150min at 165 DEG C；After steaming and decocting dissociates the feedstock into fiber
It is placed in 300 mesh nylon wire slurry bags, washed with clear water becoming clear non-foam to washings, then with pulp screen, paper pulp fiber is entered
Row screening the pulp, extracts bleaching fibrous raw material, enters bleaching process, and step is as follows:
(1) oxygen delignification: be naoh, the paper pulp over dry matter adding paper pulp absolute dry mass 2.5% in 10% paper pulp in pulp density
The bleaching assistant na of amount 2%2sio3Cellulose protective agent mgso with paper pulp absolute dry mass 0.6%4, after stirring in temperature it is
100 DEG C, oxygen pressure be 0.5mpa under the conditions of process 60min；
(2) slurry being processed with clear water washing step (1), washs to ph=6.5-7.5；
(3) chelation treatment: with sulphuric acid adjust slurry starting ph be 7.0, and pulp density be 10% paper pulp in add paper pulp
The dtpa of absolute dry mass 0.6%, processes 60min at 80 DEG C of temperature after stirring；
(4) slurry being processed with distilled water wash step (3), washs to ph=6.5-7.5；
(5) step (4) is washed disposed slurry and carry out peracetic acid process, adjust paper pulp ph value to 6 with naoh, in pulp density be
Add the bleaching stibilizer sodium pyrophosphate of paper pulp absolute dry mass 0.1% and 1.0% ch in 10% paper pulp3Coooh(is with active oxygen
Ao measures), process 90min after stirring under temperature 70 C；
(6) slurry being processed with distilled water wash step (5), washs to ph=6.5-7.5；
(7) step (6) is washed disposed slurry and carry out two sections of hydrogen peroxide bleachings process: adjusting paper pulp ph value with naoh is 11.5,
Starch the bleaching assistant na adding paper pulp absolute dry mass 2.5% in the paper pulp that concentration is 10%2sio3, 0.5% cellulose protective agent
mgso4With 2.0% h2o2, bleach 120min after stirring at 80 DEG C of temperature, slurrying distillation washing after first paragraph bleaching
Wash to ph=6.5-7.5；Washing disposed slurry adjusts paper pulp starting ph to 11.5 with naoh again, is in 10% paper pulp in slurry concentration
Add the bleaching assistant na of paper pulp absolute dry mass 2.5%2sio3, 0.5% cellulose protective agent mgso4With 1.0% h2o2, stirring
120min is bleached at 80 DEG C of temperature after uniformly；
(8) slurry being processed with distilled water wash step (7), washs to ph=6.5-7.5；
(9) paper pulp after step (8) bleaching is joined with commodity long fibre bleached pulp and copy: washing after bleaching slurry and commodity long fibre tcf
Bleached pulp respectively defibrination to 65oSr, by the commodity long fiber pulp of milled according to 25% proportioning (with respect to total oven dry stock quality) with
The washing after bleaching slurry mixing of milled；Mixing disposed slurry is broken up, and makes slurry dense for 2g/l, sequentially adds paper pulp absolute dry mass 2.0%
Cationic starch (0.5% strength solution), the akd(1% strength solution of paper pulp absolute dry mass 0.3%), paper pulp absolute dry mass 0.03%
Cpam(0.1% strength solution), paper pulp absolute dry mass 0.5% shitosan (5% strength solution), paper pulp absolute dry mass 0.03% grease proofing
Waterproofing agent (5% strength solution)；Every kind of medicament and slurry mix and blend time 10min, are sufficiently stirred for during dosing breaing up；
(10) paper pulp handling step (9) well is copied on small-sized fourdrinier paper machine and is made Food Packaging Paper.
Result: gained Food Packaging Paper reaches Food Packaging Paper standard (qbt 1014-2010) Grade A.
Embodiment 2: the method that this hemp's woody-core tcf bleached pulp prepares Food Packaging Paper, particular content is as follows:
In embodiment, hemp's woody-core tcf bleached pulp is with the hemp's woody-core divesting Cortex Cannabis as raw material, for being about the one-tenth section of 3 ~ 5cm
Xylem core；Raw material carries out kraft cooking through screening in zql type electric cooking pot, and conditions of cooking is: liquor ratio 1:4,
Alkali charge 20%(is in terms of naoh), sulphidity 22%, rise to 85 DEG C with 30min from initial temperature after digester idle running 10min, then use
100min rises to 165 DEG C, and is incubated 150min at 165 DEG C.Steaming and decocting is placed in 300 mesh nylon wire slurry bags after dissociating the feedstock into fiber
In, washed with clear water becoming clear non-foam to washings, then with pulp screen, screening the pulp is carried out to paper pulp fiber, extract bleaching and use
Fibrous raw material, enters bleaching process, and step is as follows:
(1) oxygen delignification: be naoh, the paper pulp over dry matter adding paper pulp absolute dry mass 3.0% in 12% paper pulp in pulp density
The bleaching assistant na of amount 3%2sio3Cellulose protective agent mgso with paper pulp absolute dry mass 0.5%4, after stirring in temperature it is
100℃, oxygen pressure be 0.6mpa under the conditions of process 60min；
(2) slurry being processed with clear water washing step (1), washs to ph=6.5-7.5；
(3) chelation treatment: with sulphuric acid adjust slurry starting ph be 6.0, and pulp density be 10% paper pulp in add paper pulp
The dtpa of absolute dry mass 0.5%, processes 30min under temperature 70 C after stirring；
(4) slurry being processed with distilled water wash step (3), washs to ph=6.5-7.5；
(5) step (4) is washed disposed slurry and carry out peracetic acid process, adjust paper pulp ph value to 5 with naoh, in pulp density be
Add the bleaching stibilizer sodium pyrophosphate of paper pulp absolute dry mass 0.15% and 1.2% ch in 10% paper pulp3Coooh(is with active oxygen
Ao measures), process 60min after stirring at 80 DEG C of temperature；
(6) slurry being processed with distilled water wash step (5), washs to ph=6.5-7.5；
(7) step (6) is washed disposed slurry and carry out two sections of hydrogen peroxide bleachings process: adjusting paper pulp ph value with naoh is 11.0,
Starch the bleaching assistant na adding paper pulp absolute dry mass 2.0% in the paper pulp that concentration is 10%2sio3, 0.5% cellulose protective agent
mgso4With 1.5% h2o2, bleach 150min after stirring at 80 DEG C of temperature, slurrying distillation washing after first paragraph bleaching
Wash to ph=6.5-7.5.Washing disposed slurry adjusts paper pulp starting ph to 11.5 with naoh again, is in 10% paper pulp in slurry concentration
Add the bleaching assistant na of paper pulp absolute dry mass 2.0%2sio3, 0.5% cellulose protective agent mgso4With 1.0% h2o2, stirring
150min is bleached at 80 DEG C of temperature after uniformly；
(8) slurry being processed with distilled water wash step (7), washs to ph=6.5-7.5；
(9) paper pulp after step (8) bleaching is joined with commodity long fibre bleached pulp and copy: washing after bleaching slurry and commodity long fibre tcf
Bleached pulp respectively defibrination to 65oSr, by the commodity long fiber pulp of milled according to 15% proportioning (with respect to total oven dry stock quality) with
The hemp's woody-core bleached pulp mixing of milled.Mixing disposed slurry is broken up, and makes slurry dense for 2g/l, sequentially adds paper pulp absolute dry mass 1.0%
Cationic starch (0.5% strength solution), the akd(1% strength solution of paper pulp absolute dry mass 0.3%), paper pulp absolute dry mass
0.02% cpam(0.1% strength solution), paper pulp absolute dry mass 0.3% shitosan (5% strength solution), paper pulp absolute dry mass
0.02% grease-proof and waterproof agent (5% strength solution)；Every kind of medicament and slurry mix and blend time 15min, fully stir during dosing
Mix and break up；
(10) paper pulp handling step (9) well is copied on small-sized fourdrinier paper machine and is made Food Packaging Paper.
Result: gained Food Packaging Paper reaches Food Packaging Paper standard (qbt 1014-2010) certified products.
Embodiment 3: the method that this hemp's woody-core tcf bleached pulp prepares Food Packaging Paper, particular content is as follows:
In embodiment, hemp's woody-core tcf bleached pulp is with the hemp's woody-core divesting Cortex Cannabis as raw material, for being about the one-tenth section of 3 ~ 5cm
Xylem core；Raw material carries out ammonium sulfite steaming and decocting through screening in zql type electric cooking pot, and conditions of cooking is: liquor ratio 1:
4, the anthraquinone of the ammonium sulfite of interpolation paper pulp absolute dry mass 19%, 5% carbamide and 0.2%, use 30min after digester idle running 10min
Rise to 85 DEG C from initial temperature, then rise to 150 DEG C with 100min, and be incubated 45min at 150 DEG C, then rise to 165 DEG C with 30min, and
It is incubated 150min at 165 DEG C.Steaming and decocting is placed in after dissociating the feedstock into fiber in 300 mesh nylon wires slurry bags, is washed with clear water to washing
Till washing the water clear non-foam of change, then with pulp screen, screening the pulp is carried out to paper pulp fiber, extract bleaching fibrous raw material, enter bleaching
Operation, step is as follows:
(1) oxygen delignification: be naoh, the paper pulp absolute dry mass adding paper pulp absolute dry mass 2% in 8% paper pulp in pulp density
1.0% bleaching assistant na2sio3Cellulose protective agent mgso with paper pulp absolute dry mass 0.4%4, after stirring in temperature it is
100 DEG C, oxygen pressure be 0.5mpa under the conditions of process 60min；
(2) slurry being processed with clear water washing step (1), washs to ph=6.5-7.5；
(3) chelation treatment: with sulphuric acid adjust slurry starting ph be 5.0, and pulp density be 8% paper pulp in add paper pulp
The dtpa of absolute dry mass 0.4%, processes 60min under temperature 70 C after stirring；
(4) slurry being processed with distilled water wash step (3), washs to ph=6.5-7.5；
(5) step (4) is washed disposed slurry and carry out peracetic acid process, adjust paper pulp ph value to 4 with naoh, be 8% in pulp density
Paper pulp in add the bleaching stibilizer sodium pyrophosphate of paper pulp absolute dry mass 0.05% and 0.6% ch3Coooh(is with active oxygen ao
Metering), process 120min after stirring under temperature 60 C；
(6) slurry being processed with distilled water wash step (5), washs to ph=6.5-7.5；
(7) step (6) is washed disposed slurry and carry out two sections of hydrogen peroxide bleachings process: adjusting paper pulp ph value with naoh is 11.0,
Starch the bleaching assistant na adding paper pulp absolute dry mass 3.0% in the paper pulp that concentration is 8%2sio3, 0.8% cellulose protective agent
mgso4With 2.0% h2o2, bleach 120min after stirring at 90 DEG C of temperature, slurrying distillation washing after first paragraph bleaching
Wash to ph=6.5-7.5.Washing disposed slurry adjusts paper pulp starting ph to 11.0 with naoh again, is in 8% paper pulp in slurry concentration
Add the bleaching assistant na of paper pulp absolute dry mass 3.0%2sio3, 0.8% cellulose protective agent mgso4With 1.5% h2o2, stirring
150min is bleached at 80 DEG C of temperature after uniformly；
(8) slurry being processed with distilled water wash step (7), washs to ph=7.5；
(9) step (8) is washed after bleaching slurry join with commodity long fibre bleached pulp and copy: washing after bleaching slurry and commodity long fibre tcf
Bleached pulp respectively defibrination to 55oSr, by the commodity long fiber pulp of milled according to 30% proportioning (with respect to total oven dry stock quality) with
The hemp's woody-core bleached pulp mixing of milled.Mixing disposed slurry is broken up, and makes slurry dense for 2g/l, sequentially adds paper pulp absolute dry mass 1.5%
Cationic starch (0.5% strength solution), the akd(1% strength solution of paper pulp absolute dry mass 0.25%), paper pulp absolute dry mass
0.04% cpam(0.1% strength solution), paper pulp absolute dry mass 0.6% shitosan (5% strength solution), paper pulp absolute dry mass
0.05% grease-proof and waterproof agent (5% strength solution)；Every kind of medicament and slurry mix and blend time 8min, are sufficiently stirred for during dosing
Break up；
(10) paper pulp handling step (9) well is copied on small-sized fourdrinier paper machine and is made Food Packaging Paper.
Result: gained Food Packaging Paper reaches Food Packaging Paper standard (qbt 1014-2010) Grade A.
Embodiment 4: the method that this hemp's woody-core tcf bleached pulp prepares Food Packaging Paper, particular content is as follows:
In embodiment, hemp's woody-core tcf bleached pulp is with the hemp's woody-core divesting Cortex Cannabis as raw material, for being about the one-tenth section of 3 ~ 5cm
Xylem core；Raw material carries out alkali-AQ pulping through screening in zql type electric cooking pot, and conditions of cooking is: liquor ratio 1:
4.5, alkali charge 21%(is in terms of naoh), then add the anthraquinone of paper pulp absolute dry mass 0.2%, use 30min after digester idle running 10min
Rise to 85 DEG C from initial temperature, then rise to 165 DEG C with 120min, and be incubated 120min at 165 DEG C.After steaming and decocting dissociates the feedstock into fiber
It is placed in 300 mesh nylon wire slurry bags, washed with clear water becoming clear non-foam to washings, then with pulp screen, paper pulp fiber is entered
Row screening the pulp, extracts bleaching fibrous raw material, enters bleaching process, and step is as follows:
(1) oxygen delignification: be naoh, the paper pulp over dry matter adding paper pulp absolute dry mass 2.0% in 10% paper pulp in pulp density
The bleaching assistant na of amount 3.0%2sio3Cellulose protective agent mgso with paper pulp absolute dry mass 0.8%4, in temperature after stirring
For 100 DEG C, oxygen pressure for bleaching 60min under the conditions of 0.6mpa；
(2) slurry being processed with clear water washing step (1), washs to ph=6.5-7.5；
(3) chelation treatment: with sulphuric acid adjust slurry starting ph be 4.0, and pulp density be 10% paper pulp in add paper pulp
The edta of absolute dry mass 0.8%, processes 30min at 90 DEG C of temperature after stirring；
(4) slurry being processed with distilled water wash step (3), washs to ph=6.5-7.5；
(5) step (4) is washed disposed slurry and carry out peracetic acid process, adjust paper pulp ph value to 7 with naoh, in pulp density be
Add the bleaching stibilizer sodium pyrophosphate of paper pulp absolute dry mass 0.15% and 1.2% ch in 12% paper pulp3Coooh(is with active oxygen
Ao measures), process 90min after stirring at 80 DEG C of temperature；
(6) slurry being processed with distilled water wash step (5), washs to ph=6.5-7.5；
(7) step (6) is washed disposed slurry and carry out two sections of hydrogen peroxide bleachings process: adjusting paper pulp ph value with naoh is 11.5,
Starch the bleaching assistant na adding paper pulp absolute dry mass 2.0% in the paper pulp that concentration is 12%2sio3, 0.8% cellulose protective agent
mgso4With 2.0% h2o2, bleach 150min after stirring at 90 DEG C of temperature, slurrying distillation washing after first paragraph bleaching
Wash to ph=6.5-7.5.Washing disposed slurry adjusts paper pulp starting ph to 11.5 with naoh again, is in 12% paper pulp in slurry concentration
Add the bleaching assistant na of paper pulp absolute dry mass 2.0%2sio3, 0.8% cellulose protective agent mgso4With 1.5% h2o2, stirring
120min is bleached at 80 DEG C of temperature after uniformly；
(8) slurry being processed with distilled water wash step (7), washs to ph=6.5-7.5；
(9) step (8) is washed after bleaching slurry join with commodity long fibre bleached pulp and copy: washing after bleaching slurry and commodity long fibre tcf
Bleached pulp respectively defibrination to 65oSr, by the commodity long fiber pulp of milled according to 15% proportioning (with respect to total oven dry stock quality) with
The hemp's woody-core bleached pulp mixing of milled.Mixing disposed slurry is broken up, and makes slurry dense for 2g/l, sequentially adds paper pulp absolute dry mass 1.5%
Cationic starch (0.5% strength solution), the akd(1% strength solution of paper pulp absolute dry mass 0.3%), paper pulp absolute dry mass
0.02% cpam(0.1% strength solution), paper pulp absolute dry mass 0.4% shitosan (5% strength solution), paper pulp absolute dry mass
0.04% grease-proof and waterproof agent (5% strength solution)；Every kind of medicament and slurry mix and blend time 5min, are sufficiently stirred for during dosing
Break up；
(10) paper pulp handling step (9) well is copied on small-sized fourdrinier paper machine and is made Food Packaging Paper.
Result: gained Food Packaging Paper reaches Food Packaging Paper standard (qbt 1014-2010) certified products.
Claims (5)
1. a kind of hemp's woody-core total chlorine free bleaching slurry prepare food wrapper method it is characterised in that: be former with hemp's woody-core
After material carries out conventional chemistry slurrying, hemp's woody-core chemical pulp is carried out with total chlorine free bleaching, gained bleached pulp is with addition of long fibre tcf
Bleached pulp, defibrination, and add shitosan, cationic starch, PAMC, alkyl ketene dimer, grease-proof and waterproof
Agent makes Food Packaging Paper.
2. the hemp's woody-core total chlorine free bleaching slurry according to claim 1 prepare food wrapper method it is characterised in that
Step is as follows:
(1) carried out after conventional chemistry slurrying for raw material with hemp's woody-core, hemp's woody-core chemical pulp oxygen delignification processed:
In pulp density in 8%-12% paper pulp, adding sodium hydroxide, the paper pulp absolute dry mass of paper pulp absolute dry mass 2.0-3.0%
The cellulose protective agent magnesium sulfate of the bleaching assistant sodium silicate of 1-3% and paper pulp absolute dry mass 0.4-0.8%, in temperature after stirring
Spend for 100 DEG C, oxygen pressure for processing 60min under the conditions of 0.4-0.6mpa；Process disposed slurry clear water to wash to ph=6.5-
7.5；
(2) chelation treatment: adjust oxygen delignification's disposed slurry ph value to 3.0-7.0 with sulphuric acid or hydrochloric acid, and in pulp density be
Add diethylene triamine pentacetic acid (DTPA) or the ethylenediaminetetraacetic acid of paper pulp absolute dry mass 0.3-0.8%, stirring is all in the paper pulp of 6-12%
Process 30-60min at temperature 70-90 DEG C after even, process disposed slurry and be washed with water to ph=6.5 ~ 7.5；
(3) washing disposed slurry carries out peracetic acid bleaching, is washed with distilled water to ph=6.5 ~ 7.5 after bleaching；
(4) washing disposed slurry carries out hydrogen peroxide two-stage bleaching, is all washed with distilled water to afterwards with two sections between two sections
Ph=6.5 ~ 7.5, finally obtain final product paper pulp after bleaching；
(5) after bleaching, paper pulp is joined with addition of long fibre tcf bleached pulp and is copied, and adds auxiliary agent, is made general using small-sized fourdrinier paper machine
Logical food wrapper.
3. hemp's woody-core total chlorine free bleaching slurry according to claim 2 prepare food wrapper method it is characterised in that
Step (3) peracetic acid bleaching condition is: washs disposed slurry ph value with naoh regulating step (2) to 3-7, in pulp density
For adding the sodium pyrophosphate of paper pulp absolute dry mass 0.05-0.15% and the peracetic acid of 0.6-1.2% in the paper pulp of 8%-12%, wherein
The amount of peracetic acid is measured with active oxygen ao, bleaches 60-120min after stirring at temperature 60-80 DEG C, with steaming after bleaching
Distilled water is washed to ph=6.5-7.5.
4. hemp's woody-core total chlorine free bleaching slurry according to claim 2 prepare food wrapper method it is characterised in that
Step (4) hydrogen peroxide two-stage bleaching process condition is: washs disposed slurry starting ph with naoh regulating step (3) to 10.5-
11.5, the paper pulp for 8-12% for the slurry concentration adds the h of paper pulp absolute dry mass 1.5-2.0%2o2, the bleaching assistant of 1-3%
na2sio3Cellulose protective agent mgso with 0.2-0.8%4, bleach 120-180min at temperature 70-90 DEG C after stirring,
It is washed with distilled water to ph=6.5-7.5 after first paragraph drift；Paper pulp starting ph is adjusted to 10.5-11.5 with naoh again after washing,
Add the h of paper pulp absolute dry mass 1.0-1.5% in the paper pulp for 8-12% for the slurry concentration2o2, the bleaching assistant na of 1-3%2sio3With
The cellulose protective agent mgso of 0.2-0.8%4, at temperature 70-90 DEG C, after stirring, bleach 120-180min.
5. hemp's woody-core total chlorine free bleaching slurry according to claim 2 prepare food wrapper method it is characterised in that
The step that step (5) prepares Food Packaging Paper is: after step (4) is bleached, paper pulp and long fibre tcf bleached pulp be respectively
Defibrination is to 50-70oSr, under the premise of identical beating degree, long fibre tcf bleached pulp is pressed with respect to total oven dry stock quality 15-30%
Ratio carries out proportioning and mixes with paper pulp after bleaching, after mixing breaks up slurry, makes slurry dense for 2g/l, sequentially adds paper pulp over dry matter
The cationic starch of amount 1.0-2.0%, the alkyl ketene dimer of paper pulp absolute dry mass 0.2-0.3%, paper pulp absolute dry mass 0.02-
0.04% PAMC, paper pulp absolute dry mass 0.2-0.6 shitosan, absolute dry mass 0.02-0.05% is grease proofing for paper pulp
Waterproofing agent；Every kind of medicament and slurry mix and blend time 5-15min, are sufficiently stirred for during dosing breaing up, plus the slurry of good auxiliary agent
Material makes Food Packaging Paper using small-sized fourdrinier paper machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610830542.0A CN106368030B (en) | 2016-09-19 | 2016-09-19 | The method that hemp's woody-core total chlorine free bleaching slurry prepares food wrapper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610830542.0A CN106368030B (en) | 2016-09-19 | 2016-09-19 | The method that hemp's woody-core total chlorine free bleaching slurry prepares food wrapper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106368030A true CN106368030A (en) | 2017-02-01 |
| CN106368030B CN106368030B (en) | 2018-12-14 |
Family
ID=57897509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610830542.0A Active CN106368030B (en) | 2016-09-19 | 2016-09-19 | The method that hemp's woody-core total chlorine free bleaching slurry prepares food wrapper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106368030B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653012A (en) * | 2017-10-12 | 2019-04-19 | 中国科学院青岛生物能源与过程研究所 | A method of dissolving pulp is prepared using stalk or energy-source plant |
| CN110331614A (en) * | 2019-07-15 | 2019-10-15 | 云南华麻生物开发有限公司 | A kind of slurry being used to prepare suction pipe paper |
| CN110747681A (en) * | 2019-10-31 | 2020-02-04 | 齐鲁工业大学 | Paper pulp bleaching protective agent based on ionic liquid |
| CN111851106A (en) * | 2019-04-26 | 2020-10-30 | 云南汉盟制药有限公司 | Preparation method of industrial hemp stalk paper pulp and application of industrial hemp stalk paper pulp in paper preparation |
| CN112663375A (en) * | 2020-12-21 | 2021-04-16 | 华南理工大学 | Method for pretreating hydrogen peroxide bleaching paper pulp by virtue of micromolecule acid and chitosan |
| WO2021151904A1 (en) | 2020-01-28 | 2021-08-05 | Rbx Creations | Method for obtaining a hemp-based cellulosic pulp, cellulosic pulp obtained using the method and product obtained using the cellulosic pulp |
| CN114134748A (en) * | 2021-11-25 | 2022-03-04 | 牡丹江恒丰纸业股份有限公司 | Chlorine-free bleaching method for hemp pulp |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1290786A (en) * | 2000-11-21 | 2001-04-11 | 沈阳市天然纤维研究所 | Method for producing chlorine-free bleached pulp, paper and paper board by using hemp stem |
| CN1560359A (en) * | 2004-02-20 | 2005-01-05 | 刘海博 | High strength packing paper board by mixed fibre of bluish dogbane and sorghum stalks and preparation method thereof |
| CN1600989A (en) * | 2004-10-26 | 2005-03-30 | 田新 | Method for fabrication food wrap paper and cultural paper by using corn stalk to make no chlorin bleached pulp |
| CN106245452A (en) * | 2016-07-26 | 2016-12-21 | 浙江恒达新材料股份有限公司 | A kind of food-level antibacterial wrapping paper preparation technology |
-
2016
- 2016-09-19 CN CN201610830542.0A patent/CN106368030B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1290786A (en) * | 2000-11-21 | 2001-04-11 | 沈阳市天然纤维研究所 | Method for producing chlorine-free bleached pulp, paper and paper board by using hemp stem |
| CN1560359A (en) * | 2004-02-20 | 2005-01-05 | 刘海博 | High strength packing paper board by mixed fibre of bluish dogbane and sorghum stalks and preparation method thereof |
| CN1600989A (en) * | 2004-10-26 | 2005-03-30 | 田新 | Method for fabrication food wrap paper and cultural paper by using corn stalk to make no chlorin bleached pulp |
| CN106245452A (en) * | 2016-07-26 | 2016-12-21 | 浙江恒达新材料股份有限公司 | A kind of food-level antibacterial wrapping paper preparation technology |
Non-Patent Citations (1)
| Title |
|---|
| 李雪球: "薄型食品包装纸的工艺初探", 《纸和造纸》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653012A (en) * | 2017-10-12 | 2019-04-19 | 中国科学院青岛生物能源与过程研究所 | A method of dissolving pulp is prepared using stalk or energy-source plant |
| CN109653012B (en) * | 2017-10-12 | 2021-01-12 | 中国科学院青岛生物能源与过程研究所 | Method for preparing dissolving pulp by using straws or energy plants |
| CN111851106A (en) * | 2019-04-26 | 2020-10-30 | 云南汉盟制药有限公司 | Preparation method of industrial hemp stalk paper pulp and application of industrial hemp stalk paper pulp in paper preparation |
| CN110331614A (en) * | 2019-07-15 | 2019-10-15 | 云南华麻生物开发有限公司 | A kind of slurry being used to prepare suction pipe paper |
| CN110747681A (en) * | 2019-10-31 | 2020-02-04 | 齐鲁工业大学 | Paper pulp bleaching protective agent based on ionic liquid |
| WO2021082306A1 (en) * | 2019-10-31 | 2021-05-06 | 齐鲁工业大学 | Ionic-liquid-based bleaching protective agent for paper pulp |
| WO2021151904A1 (en) | 2020-01-28 | 2021-08-05 | Rbx Creations | Method for obtaining a hemp-based cellulosic pulp, cellulosic pulp obtained using the method and product obtained using the cellulosic pulp |
| CN112663375A (en) * | 2020-12-21 | 2021-04-16 | 华南理工大学 | Method for pretreating hydrogen peroxide bleaching paper pulp by virtue of micromolecule acid and chitosan |
| CN112663375B (en) * | 2020-12-21 | 2022-12-16 | 华南理工大学 | Method for pretreating hydrogen peroxide bleaching paper pulp by virtue of micromolecule acid and chitosan |
| CN114134748A (en) * | 2021-11-25 | 2022-03-04 | 牡丹江恒丰纸业股份有限公司 | Chlorine-free bleaching method for hemp pulp |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106368030B (en) | 2018-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106368030A (en) | Method for preparing food packaging paper through hemp core stalk total chloride-free bleached pulp | |
| KR102559550B1 (en) | Method for producing pulp for dissolution and pulp for dissolution | |
| DE2420381A1 (en) | METHOD OF DELIGNIFICATION OF LIGNOCELLULOSE MATERIAL | |
| CN108474173A (en) | Cellulase improves the purposes of the viscosity control of dissolving pulp | |
| CN102877346B (en) | Totally chlorine-free bleaching process using coniferous and broadleaf mixed sulfate chemical pulp | |
| CN102587186B (en) | Method for bleaching dendrocalamus giganteus chemical pulp | |
| US11066784B2 (en) | Method for manufacturing dissolving pulp | |
| Abrantes et al. | Hydrogen peroxide bleaching of Arundo donax L. kraft-anthraquinone pulp—Effect of a chelating stage | |
| JPH04507118A (en) | Method for bleaching lignocellulosic materials | |
| AU653467B2 (en) | Bleaching of sulphate pulp | |
| CN105556030B (en) | The method of ozone treatment chemical pulp is used in the presence of magnesium ion | |
| CN102154926B (en) | Method for improving whiteness of paper | |
| US20040200589A1 (en) | Method of making pulp having high hemicellulose content | |
| US1890179A (en) | Preparing refined bleached pulp | |
| US1809286A (en) | Pulp of high whiteness and strength and process of producing same | |
| US2687352A (en) | Process of refining hardwood pulp | |
| García-Fuentevilla et al. | Refining and urea pretreatments to enhance biobleaching of eucalyptus kraft pulp | |
| KR20010049536A (en) | Oxygen delignification of lignocellulosic material | |
| US1824837A (en) | Papermaking composition | |
| CA1153161A (en) | Method for the production of greaseproof paper | |
| US20040200587A1 (en) | Cellulose pulp having increased hemicellulose content | |
| US1987212A (en) | Bleaching of cellulose fiber | |
| CN102493260A (en) | Mixed paper pulp of reed and poplar as well as its production method | |
| Lopez et al. | Hydrogen peroxide and sodium perborate bleaching of pulp from olive tree residues | |
| KR100228740B1 (en) | The bleaching method for mechanical pulp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |