CN106498796B - The method that a kind of biochemical process ECF bleaching NaOH AQ slurries of Fast growth poplar prepare paper base material - Google Patents

The method that a kind of biochemical process ECF bleaching NaOH AQ slurries of Fast growth poplar prepare paper base material Download PDF

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CN106498796B
CN106498796B CN201611258173.9A CN201611258173A CN106498796B CN 106498796 B CN106498796 B CN 106498796B CN 201611258173 A CN201611258173 A CN 201611258173A CN 106498796 B CN106498796 B CN 106498796B
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paper
paper pulp
base material
pulp
beating degree
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CN106498796A (en
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吉兴香
陈嘉川
杨桂花
田中建
马浩
袁素娟
肖燕
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Qilu University of Technology
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Qilu University of Technology
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    • 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
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • 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
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
    • 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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
    • 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
    • D21C9/1063—Bleaching ; Apparatus therefor with compounds not otherwise provided for, e.g. activated gases
    • 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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/123—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with Cl2O
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/02—Methods of beating; Beaters of the Hollander type

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Microbiology (AREA)
  • Paper (AREA)

Abstract

The invention discloses the method that a kind of biochemical process ECF of Fast growth poplar bleaching NaOH AQ slurries prepare paper base material, it is characterized in that, comprise the following steps：The biochemical process ECF bleaching NaOH AQ slurries of Fast growth poplar are subjected to gradient mashing respectively, the beating degree of the first paper pulp is 10 25 ° of SR, and the beating degree of second of paper pulp is 30 55 ° of SR, and the beating degree of the third paper pulp is 60 70 ° of SR；Then by the paper pulp of prepare three kinds of gradients according to mass ratio 15 ~ 30：65~80：5 ~ 10 carry out preparing paper base material after being well mixed.In paper-making process, the present invention is beaten technology and from two key technologies of adding technique using gradient, solves the deficiency of single mashing technology in the prior art, it is to avoid the use of additional additive.

Description

A kind of biochemical process ECF bleaching NaOH-AQ slurries of Fast growth poplar prepare paper base material Method
Technical field
The invention belongs to pulp technology for making paper, and in particular to a kind of biochemical process ECF bleaching NaOH-AQ slurries of Fast growth poplar The method for preparing paper base material.
Background technology
Since 2012, the total output of China's paper and cardboard has exceeded a quarter of global yield, is sure to occupy the first in the world. With the fast development of China's paper industry, timber biological matter turns into the main raw material(s) of China's pulp and paper industry, accounts for The 60% of raw material of papermaking fiber.With the continuous improvement of pulp and paper industry production technology level, leaf wood is in pulping and paper-making Shared proportion is continued to increase.Currently, the extensive Fast growth poplar woods of northern China has provided scale, is the hair of pulp and paper industry Good raw material has been laid in exhibition., will using the component isolation technics of wood fibre paper making raw material with the development of society and science and technology Its separation prepare chemical pulp except use it for preparing traditional paper and cardboard while, redevelop series prepare paper base material The new technology of material, widens traditional paper industry to new material industry, is that the transition and upgrade of traditional paper industry has been widened newly Thinking and approach.
The process of papermaking is broadly divided into two basic processes of slurrying and papermaking.Now in production generally by single starting pulps Or mixed material paper pulp is after simple mashing, then it is various toward filler, sizing material, sizing agent of addition improvement paper performance etc. in paper pulp Auxiliary material, then carries out copying the type of being made or compressing.Wherein, papermaking filler refers to that some added in paper pulp are substantially insoluble in The solia particle of water, the purpose of addition be improve paper opacity, brightness, smoothness, flexibility, uniformity and size it is steady It is qualitative.The good hand touch of paper can also be made, its hygroscopicity is reduced, fiber consumption is reduced.The paper pulp for adding filler is easily dehydrated, easily Dry, energy resource consumption can be reduced, reduce papermaking cost.But, the easy dry linting of filled paper, hair loss, these shortcomings are also needed To be made up by intensive and top sizing.The addition of a large amount of chemicals, can be right while making the raising or change of paper Using more or less causing certain harm with environment.
The biochemical process ECF bleaching NaOH-AQ slurries on Fast growth poplar are prepared using conventional paper-making technique at present Paper base material, which exists, is prepared into the problem of every physical index after paper is relatively low, especially on art post paperboard is prepared, Bai Ka Paper has higher requirement in whiteness, deflection, bursting strength and smoothness etc..
The content of the invention
For problems of the prior art, the present invention is beaten technology and from two crucial skills of adding technique using gradient Art, using the type of being made is copied and compressing two methods prepare the new method of senior paper base material, obtains series high strength The new preparation technology of paper base material.
The technical solution adopted by the present invention is as follows：
The biochemical process ECF bleaching NaOH-AQ slurries that first purpose of the present invention is to provide a kind of Fast growth poplar prepare paper The method of sill, comprises the following steps：
The biochemical process ECF bleaching NaOH-AQ slurries of Fast growth poplar are subjected to gradient mashing, the mashing of the first paper pulp respectively Spend for 10~25 ° of SR, the beating degree of second of paper pulp is 30~55 ° of SR, and the beating degree of the third paper pulp is 60~70 ° of SR；
Then by the paper pulp of prepare three kinds of gradients according to mass ratio 15~30：65~80：5~10 mix Paper base material is prepared after even.
Because energy consumption needed for different beating degrees is different, the present invention can in proportion enter according to the characteristic of required paper base material Paper base material is prepared after row is well mixed, can play in the performance of paper base material needed for ensureing to reach, make energy resource consumption most It is low.
It is preferred that, the beating degree of the first paper pulp is 15~25 ° of SR, and the beating degree of second of paper pulp is 35~50 ° SR, the beating degree of the third paper pulp is 60~65 ° of SR.
It is preferred that, according to paper pulp raw material of the invention specific, for cause the physical property of paper base material for preparing compared with Good, the mass ratio of the first paper pulp, second of paper pulp and the third paper pulp is 20~30：65~75：5~10.
Most preferably, the mass ratio of the first paper pulp, second of paper pulp and the third paper pulp is 25：70：5.
It is preferred that, the preparation method referenced patents of the biochemical process ECF bleaching NaOH-AQ slurries of the Fast growth poplar Preparation method in ZL201310301253.8.
The preparation method of the biochemical process ECF bleaching NaOH-AQ slurries of Fast growth poplar, comprises the following steps：
(1) boiling：Fast growth poplar wood chip is taken, boiling in digester is put into, magma is obtained, is then washed, screened, obtain paper Slurry；
(2) xylanase pretr eatment；
(3) ECF is bleached：The paper pulp of above-mentioned process ferment treatment is bleached, and bleaching process is ODED, and step is：First, it is right Deoxidation lignin or reinforcing deoxidation lignin are carried out by the paper pulp of ferment treatment；After oxygen delignification terminates, paper pulp is washed, then Carry out D sections of ClO 2 bleachings；After D sections of ClO 2 bleachings terminate, paper pulp is washed, E sections are then carried out；E sections are terminated Afterwards, paper pulp is washed, then carries out second D sections, completed.
Design parameter is：Oxygen Delignification of Fast-Growing is：Starch dense 10%, NaOH consumptions 2.5%, oxygen pressure 0.6MPa, temperature 100 DEG C, time 80min, MgSO4Consumption 0.5%；D sections：ClO2Consumption is 0.5%, initial pH value 5, temperature 70 C, slurry dense 10%, when Between 120min；E sections：NaOH consumptions 2%, slurry dense 10%, temperature 70 C；Second D sections：ClO2Consumption is 0.5%, initial pH value 5, temperature 70 C, slurry dense 10%, time 120min.
The concrete mode of the boiling is：Take 15~25mm of length, 10~20mm of width, 3~5mm of thickness quick growth poplar wood After piece, natural air drying, boiling is carried out, Fast growth poplar sodium hydroxide anthraquinone magma is made, the condition of boiling is：Alkali charge 22%, it is right Over dry raw material, NaOH meters；AQ consumptions 0.05%, liquor ratio 1:4,165 DEG C of boiling maximum temperature carries out deflation 10- at 105 DEG C 15min, heating-up time 90min, soaking time 90min；Boiling disposed slurry is scrubbed, screening, obtains paper pulp, the Kappa number 16 of paper pulp ~21.
The concrete mode of the xylanase pretr eatment is：It is 10% to adjust pulp density, then uses zytase X1、X2 Or X3Handled, in processing procedure, rubbed once at interval of 10~15min；Take out, be put into boiling water bath after processing 10min, makes zytase inactivate terminating reaction, paper pulp is cleaned with running water.
The zytase X1、X2Or X3The concrete technology condition handled is as follows：Dextranase X1Process conditions be： Enzyme dosage 10IU/L, temperature 50 C, pH8-9, time 90-120min；Zytase X2Process conditions be：Enzyme dosage 8IU/g, 55 DEG C of temperature, pH8-9, time 90-120min；Zytase X3Process conditions be：Enzyme dosage 10IU/g, temperature 50 C, PH8-9, time 120min.
It is preferred that, obtain after well mixed paper pulp, using copying the type of being made or compressing prepare paper base material.Copy and be made Type and it is compressing be conventional technique in pulp technology for making paper.
Second object of the present invention is to provide the paper base material that a kind of use above method is prepared.The paper base material It can make a living and apply flexibly paper base material and white card body paper paper base material.
It is preferred that, it is more suitable for preparing white card body paper using the method for the present invention, obtained white card body paper uniform ground, it is thick It is thin consistent, not dry linting.
Third object of the present invention is to provide a kind of application of gradient mixed pulp in white card body paper is prepared, the ladder The preparation method for spending mixed pulp is as follows：The biochemical process ECF bleaching NaOH-AQ slurries of Fast growth poplar are carried out into gradient respectively to beat Slurry, the beating degree of the first paper pulp is 10~25 ° of SR, the beating degree of second of paper pulp is 30~55 ° of SR, and the third paper pulp is beaten The degree of beating is 60~70 ° of SR；
Then by the paper pulp of prepare three kinds of gradients according to mass ratio 15~30：65~80：5~10 mix Gradient mixed pulp is obtained after even.
It is preferred that, the beating degree of the first paper pulp is 15~25 ° of SR, and the beating degree of second of paper pulp is 35~50 ° SR, the beating degree of the third paper pulp is 60~65 ° of SR；
It is preferred that, the mass ratio of the first paper pulp, second of paper pulp and the third paper pulp is 20~30：65~75：5~ 10；
It is further preferred that the mass ratio of the first paper pulp, second of paper pulp and the third paper pulp is 25：70：5.
Art post paperboard is because its whiteness is high, intensity turns into greatly a kind of widely used package paper, and it is by the white card body paper knot of multilayer Close and constitute, a kind of paper manufactured through multi-roller rolling.Need to add filler and auxiliary agent in slurries after general mashing.
The white card body paper prepared using the method for the present invention, there is higher deflection, bursting strength and smoothness.
Because the paper pulp used in the present invention is that biochemical process is bleached in gained Fast growth poplar chemical pulp, pulp bleaching process By the effect of biology enzyme, the flexibility of paper pulp fiber strengthens, and pulping process energy consumption is substantially reduced, the holding of the paper pulp after mashing Preferable flexibility and manufacturing paper with pulp property.
The purpose of gradient mashing is paper pulp is kept the good water filtering performance of paper pulp fiber when preparing paper base material, Also to cause the exposed enough hydroxyls of paper pulp fiber shaping paper base material is possessed enough hydrogen bonds, Covalent bonding together, make Obtain paper base material one chain-shaped network structure staggeredly of formation, it is ensured that the excellent physical strength of shaping paper base material.This is in production White card body paper has played obvious action.
Beating degree and fibrous binding force, fracture length, folding strength, tearability, deflection, smoothness etc. have complicated relation, For different pulp varieties, this relation does not have specific rule, so needing to touch by substantial amounts of experiment progress research Rope, obtains preparing paper base material preferably beating degree.For the biochemical process ECF bleaching NaOH-AQ slurries of specific Fast growth poplar, Present invention optimization obtains the beating degree and its respective content ratio of three kinds of gradients, the slurry of different ratio and gradient beating degree it Between play a part of cooperative compensating, requirement to beating degree reduction can avoid conditions of beating control bad, easily occur it is quantitative not The problem of.The physical property of paper substrate and the retention of mashing, the addition of filler and filler prepared due to tradition has larger Relation, if to prepare a kind of specific paper substrate, it is necessary to get hold of each link.And through research, for specific raw material, sheet Invention can prepare preferable paper base material by regulating and controlling mashing gradient and its respective content.
The present invention is starched for the biochemical process ECF bleachings NaOH-AQ of specific Fast growth poplar, through analysis and research, beating degree (10~25 ° of SR) relatively low paper pulp fiber is longer, wire-dividing broom purification lesser extent, and certain support is played in paper base material and is made With, and ensure water filtering performance good in paper base material preparation process, the consumption of this part paper pulp fiber it is general 15%~ 30%；Beating degree (30~55 ° of SR) moderate paper pulp fiber has been cut off, and fiber wire-dividing broom purification preferably, is preparing paper base material During, playing a part of interweaving fibre compact combines, and the consumption proportion of this part paper pulp fiber is maximum, and usually 65 ~80%；The higher paper pulp fiber of beating degree (60~70 ° of SR), the cut-out of fiber in itself is more, wire-dividing broom purification degree is very high, fine Dimension attenuates short and small, and the hydroxyl and hydrogen bond exposed is more, during paper base material is prepared, and plays link and interweaves more hydrogen bonds With covalent bond, the effect in filling paper base material space, the consumption proportion of this part paper pulp fiber is less, usually 5~ 10%.
Refer to from adding technique, it is not necessary to extra additive, chemical pulp need to only be carried out to gradient mashing respectively, and part is few The beating degree for measuring chemical pulp is improved, and it is short tiny that fiber becomes, and coordinates according to a certain percentage, can replace the use of additive.
Above-mentioned technical proposal has the advantages that：
(1) in paper-making process, the present invention is beaten technology and from two key technologies of adding technique using gradient, solves Single mashing technology and the deficiency of mixing plurality of raw materials mashing in the prior art, it is to avoid the use of additional additive.
(2) physical properties of gradient of the invention mashing technology and the paper base material prepared from adding technique are excellent It is different, especially prepare white card body paper.
Embodiment
With reference to embodiment, the present invention is further described.
Embodiment 1
It is prepared by the method that a kind of biochemical process ECF bleaching NaOH-AQ slurries of Fast growth poplar prepare paper base material, the embodiment White card body paper paper base material, the white card body paper material can be directly as environmental protection package paper base material.
Step is as follows：
(1) by patent ZL201310301253.8 " a kind of NaOH-AQ of Fast growth poplar starches biochemical process ECF bleaching process " The high-performance element-free chlorine Fast growth poplar bleach chemical pulp that technology is obtained, pulp brightness 86.2%ISO takes three parts of paper pulp to utilize PFI Mill carries out accurate defibrination so that the beating degree of paper pulp is 25 ° of SR, 45 ° of SR, 65 ° of SR respectively.
Wherein, pulp brightness is the preparation method of 86.2%ISO chemical pulp, is comprised the following steps：
1) boiling：Fast growth poplar wood chip is taken, boiling in digester is put into, magma is obtained, is then washed, screened, obtain paper pulp；
The concrete mode of the boiling is：Take 15~25mm of length, 10~20mm of width, 3~5mm of thickness quick growth poplar wood After piece, natural air drying, boiling is carried out, Fast growth poplar sodium hydroxide anthraquinone magma is made, the condition of boiling is：Alkali charge 22%, it is right Over dry raw material, NaOH meters；AQ consumptions 0.05%, liquor ratio 1:4,165 DEG C of boiling maximum temperature is deflated at 105 DEG C 10min, heating-up time 90min, soaking time 90min；Boiling disposed slurry is scrubbed, screening, obtains paper pulp.
2) xylanase pretr eatment；
The concrete mode of the xylanase pretr eatment is：It is 10% to adjust pulp density, is then entered with zytase X1 Row processing, in processing procedure, is rubbed once at interval of 15min；Taken out after processing, be put into 10min in boiling water bath, make xylan Enzyme inactivates terminating reaction, and paper pulp is cleaned with running water；
Zytase X1 process conditions are：Enzyme dosage 10IU/L, temperature 50 C, pH8-9, time 90-120min.
3) ECF is bleached：The paper pulp of above-mentioned process ferment treatment is bleached, and bleaching process is ODED, and step is：First, it is right Oxygen delignification is carried out by the paper pulp of ferment treatment；After oxygen delignification terminates, paper pulp is washed, D sections of titanium dioxides are then carried out Chlorine bleaching；After D sections of ClO 2 bleachings terminate, paper pulp is washed, E sections are then carried out；After E sections are terminated, paper pulp is carried out Washing, then carries out second D sections, completes；
Design parameter is：Oxygen Delignification of Fast-Growing is：Starch dense 10%, NaOH consumptions 2.5%, oxygen pressure 0.6MPa, temperature 100 DEG C, time 80min, MgSO4Consumption 0.5%；D sections：ClO2Consumption is 0.5%, initial pH value 5, temperature 70 C, slurry dense 10%, when Between 120min；E sections：NaOH consumptions 2%, slurry dense 10%, temperature 70 C；Second D sections：ClO2Consumption is 0.5%, initial pH value 5, temperature 70 C, slurry dense 10%, time 120min；
(2) the standby paper pulp fiber starched of mashing or defibrination according to 25 ° of SR of beating degree, 45 ° of SR, 65 ° of SR paper pulp fiber Raw material mixing quality ratio 15:75:10 discongest device and discongest and it is uniformly mixed through fiber, are then pressed on sheet forming apparatus Type 120g/m2Environmental protection package paper base material.
(3) at the same time, a, 45 ° of SR of selection beating degree 100% paper pulp fiber raw material, b, selection beating degree are 25 ° SR, 45 ° of SR paper pulp raw material, according to mass ratio 20：80 mixing；
Above-mentioned raw materials are discongested device and discongested through fiber makes it uniformly mix, then the compressing 120g/ on sheet forming apparatus m2Environmental protection package paper base material, does control sample use.
(4) 120g/m for being molded both the above2Environmental protection package paper base material is put on electrothermal drying cylinder and dried, then The moisture that environmentally friendly wrapping paper sill is balanced in drier is put into, makes its water tariff collection 8%, then determines the thing of paper base material Manage intensity.
(5) the indices such as table 1 of gained environmental protection package paper base material, under identical paper pulp fiber raw material, according to gradient The indices of the environmental protection package paper base material prepared are beaten to place an order the paper pulp fiber raw material system of a beating degree better than normal condition Standby environmental protection package paper base material.
The biochemical process ECF bleaching NaOH-AQ slurries of the Fast growth poplar of table 1 prepare the physical property of environmental protection package paper base material Indexes Comparison list
The method that a kind of biochemical process ECF bleaching NaOH-AQ slurries of the Fast growth poplar of embodiment 2 prepare paper base material, the reality Apply example and prepare white card body paper paper base material, the white card body paper material can be directly as environmental protection package paper base material.
Step is as follows：
(1) by patent ZL201310301253.8 " a kind of NaOH-AQ of Fast growth poplar starches biochemical process ECF bleaching process " The high-performance element-free chlorine Fast growth poplar bleach chemical pulp (using the chemical pulp described in embodiment 1) that technology is obtained, takes three parts of paper Slurry carries out accurate defibrination using PFI mills so that the beating degree of paper pulp is 20 ° of SR, 40 ° of SR, 60 ° of SR respectively.
(2) the standby paper pulp fiber raw material starched of mashing or defibrination according to 20 ° of SR of beating degree, 40 ° of SR, 60 ° of SR paper pulp Fibrous raw material mixing quality ratio 20:70:10 discongest device and discongest and it is uniformly mixed through fiber, are then pressed on sheet forming apparatus Type 130g/m is made2Environmental protection package paper base material.
(3) at the same time, a, 40 ° of SR of selection beating degree 100% paper pulp fiber raw material, b, selection beating degree are 20 ° SR, 40 ° of SR paper pulp raw material, according to mass ratio 30：70 mixing；Above-mentioned raw materials are discongested device and discongested through fiber makes it uniformly mix Close, then the compressing 130g/m on sheet forming apparatus2Environmental protection package paper base material, does control sample use.
(4) 130g/m for being molded both the above2Environmental protection package paper base material is put on electrothermal drying cylinder and dried, then The moisture that environmentally friendly wrapping paper sill is balanced in drier is put into, makes its water tariff collection 8%, then determines the thing of paper base material Manage intensity.
(5) the indices such as table 2 of gained environmental protection package paper base material, under identical paper pulp fiber raw material, according to gradient The indices of the environmental protection package paper base material prepared are beaten to place an order the paper pulp fiber raw material system of a beating degree better than normal condition Standby environmental protection package paper base material.
The biochemical process ECF bleaching NaOH-AQ slurries of the Fast growth poplar of table 2 prepare the physical property of environmental protection package paper base material Indexes Comparison list
The method that a kind of biochemical process ECF bleaching NaOH-AQ slurries of the Fast growth poplar of embodiment 3 prepare paper base material, the reality Apply example and prepare paper for daily use sill.
Step is as follows：
(1) by patent ZL201310301253.8 " a kind of NaOH-AQ of Fast growth poplar starches biochemical process ECF bleaching process " The high-performance element-free chlorine Fast growth poplar bleach chemical pulp (using the chemical pulp described in embodiment 1) that technology is obtained, takes three parts of paper Slurry carries out accurate defibrination using PFI mills so that the beating degree of paper pulp is 15 ° of SR, 35 ° of SR, 60 ° of SR respectively.
(2) the standby paper pulp fiber raw material starched of mashing or defibrination according to 15 ° of SR of beating degree, 35 ° of SR, 60 ° of SR paper pulp Fibrous raw material mixing quality ratio 20:70:10 discongest device and discongest and it is uniformly mixed through fiber, are then pressed on sheet forming apparatus Type 30g/m is made2Paper for daily use sill.
(3) at the same time, 35 ° of SR of selection beating degree 100% paper pulp fiber raw material, discongesting device through fiber and discongest makes it Uniformly mix, then the compressing 30g/m on sheet forming apparatus2Paper for daily use sill, does control sample use.
(4) 30g/m for being molded both the above2Paper for daily use sill is put on electrothermal drying cylinder and dried, Ran Houfang The moisture of balanced life paper base material into drier, makes its water tariff collection 8%, the physics for then determining paper base material is strong Degree.
(5) the indices such as table 3 of gained paper for daily use sill, under identical paper pulp fiber raw material, beats according to gradient Starch prepare paper for daily use sill indices better than normal condition place an order a beating degree paper pulp fiber raw material prepare Paper for daily use sill.
The physical property that the biochemical process ECF bleaching NaOH-AQ slurries of the Fast growth poplar of table 3 prepare paper for daily use sill refers to Mark compares list
The method that a kind of biochemical process ECF bleaching NaOH-AQ slurries of the Fast growth poplar of embodiment 4 prepare paper base material, the reality Apply example and prepare paper for daily use sill.
Step is as follows：
(1) by patent ZL201310301253.8 " a kind of NaOH-AQ of Fast growth poplar starches biochemical process ECF bleaching process " The high-performance element-free chlorine Fast growth poplar bleach chemical pulp (using the chemical pulp described in embodiment 1) that technology is obtained, takes three parts of paper Slurry carries out accurate defibrination using PFI mills so that the beating degree of paper pulp is 20 ° of SR, 40 ° of SR, 60 ° of SR respectively.
(2) the standby paper pulp fiber raw material starched of mashing or defibrination according to 20 ° of SR of beating degree, 40 ° of SR, 60 ° of SR paper pulp Fibrous raw material mixing quality ratio 15:70:15 discongest device and discongest and it is uniformly mixed through fiber, are then pressed on sheet forming apparatus Type 35g/m is made2Paper for daily use sill.
(3) at the same time, 40 ° of SR of selection beating degree 100% paper pulp fiber raw material, discongesting device through fiber and discongest makes it Uniformly mix, then the compressing 35g/m on sheet forming apparatus2Paper for daily use sill, does control sample use.
(4) 35g/m for being molded both the above2Paper for daily use sill is put on electrothermal drying cylinder and dried, Ran Houfang The moisture of balanced life paper base material into drier, makes its water tariff collection 8%, the physics for then determining paper base material is strong Degree.
(5) the indices such as table 4 of gained paper for daily use sill, under identical paper pulp fiber raw material, beats according to gradient Starch prepare paper for daily use sill indices better than normal condition place an order a beating degree paper pulp fiber raw material prepare Paper for daily use sill.
The physical property that the biochemical process ECF bleaching NaOH-AQ slurries of the Fast growth poplar of table 4 prepare paper for daily use sill refers to Mark compares list
The method that a kind of biochemical process ECF bleaching NaOH-AQ slurries of the Fast growth poplar of embodiment 5 prepare paper base material, the reality Apply example and prepare white card body paper paper base material.
Step is as follows：
(1) by patent ZL201310301253.8 " a kind of NaOH-AQ of Fast growth poplar starches biochemical process ECF bleaching process " The high-performance element-free chlorine Fast growth poplar bleach chemical pulp (using the chemical pulp described in embodiment 1) that technology is obtained, takes three parts of paper Slurry carries out accurate defibrination using PFI mills so that the beating degree of paper pulp is 20 ° of SR, 40 ° of SR, 60 ° of SR respectively.
(2) the standby paper pulp fiber starched of mashing or defibrination according to 20 ° of SR of beating degree, 40 ° of SR, 60 ° of SR paper pulp fiber Raw material mixing quality ratio 10:80:10 discongest device and discongest and it is uniformly mixed through fiber, are then pressed on sheet forming apparatus Type 120g/m2White card body paper paper base material.
(3) at the same time, a, 40 ° of SR of selection beating degree 100% paper pulp fiber raw material, b, selection beating degree are 20 ° SR, 40 ° of SR paper pulp raw material, according to mass ratio 20：80 mixing；
Above-mentioned raw materials are discongested device and discongested through fiber makes it uniformly mix, then the compressing 120g/ on sheet forming apparatus m2White card body paper paper base material, does control sample use.
(4) 120g/m for being molded both the above2White card body paper paper base material, which is put on electrothermal drying cylinder, is dried, then The moisture that white card body paper paper base material is balanced in drier is put into, makes its water tariff collection 8%, then determines the thing of paper base material Manage intensity.
(5) the indices such as table 5 of the white card body paper paper base material of gained, under identical paper pulp fiber raw material, according to gradient The indices of the white card body paper paper base material prepared are beaten to place an order the paper pulp fiber raw material system of a beating degree better than normal condition Standby white card body paper paper base material.
The biochemical process ECF bleaching NaOH-AQ slurries of the Fast growth poplar of table 5 prepare white card body paper paper base material physical property and referred to Mark compares list
Above-described embodiment is preferably embodiment, but embodiments of the present invention are not by above-described embodiment of the invention Limitation, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification, Equivalent substitute mode is should be, is included within protection scope of the present invention.

Claims (12)

1. the method that a kind of biochemical process ECF bleaching NaOH-AQ slurries of Fast growth poplar prepare paper base material, it is characterized in that, including Following steps：
The biochemical process ECF bleaching NaOH-AQ slurries of Fast growth poplar are subjected to gradient mashing respectively, the beating degree of the first paper pulp is 10 ~ 25 ° of SR, the beating degree of second of paper pulp is 30 ~ 55 ° of SR, and the beating degree of the third paper pulp is 60 ~ 70 ° of SR；
Then by the paper pulp of prepare three kinds of gradients according to mass ratio 15 ~ 30：65~80：5 ~ 10 made after being well mixed Standby paper base material.
2. the method as described in claim 1, it is characterized in that：The beating degree of the first paper pulp is 15 ~ 25 ° of SR, second The beating degree of paper pulp is 35 ~ 50 ° of SR, and the beating degree of the third paper pulp is 60 ~ 65 ° of SR.
3. the method as described in claim 1, it is characterized in that：The quality of the first paper pulp, second of paper pulp and the third paper pulp Ratio is 20 ~ 30：65~75：5~10.
4. the method as described in claim 1, it is characterized in that：The quality of the first paper pulp, second of paper pulp and the third paper pulp Ratio is 25：70：5.
5. the method as described in claim 1, it is characterized in that：Obtain after well mixed paper pulp, using copying the type of being made or compacting Shaping prepares paper base material.
6. the paper base material prepared using the method any one of claim 1 ~ 5.
7. paper base material as claimed in claim 6, it is characterized in that：The paper base material, which is made a living, applies flexibly paper base material and white card body paper Paper base material.
8. paper base material as claimed in claim 7, it is characterized in that：The paper base material is white card body paper paper base material.
9. a kind of application of gradient mixed pulp in white card body paper is prepared, it is characterized in that：The preparation of the gradient mixed pulp Method is as follows：The biochemical process ECF of Fast growth poplar bleaching NaOH-AQ slurries are subjected to gradient mashing respectively, the first paper pulp is beaten The degree of beating is 10 ~ 25 ° of SR, and the beating degree of second of paper pulp is 30 ~ 55 ° of SR, and the beating degree of the third paper pulp is 60 ~ 70 ° of SR；
Then by the paper pulp of prepare three kinds of gradients according to mass ratio 15 ~ 30：65~80：5 ~ 10 obtained after being well mixed To gradient mixed pulp.
10. application as claimed in claim 9, it is characterized in that：The beating degree of the first paper pulp is 15 ~ 25 ° of SR, second The beating degree of paper pulp is 35 ~ 50 ° of SR, and the beating degree of the third paper pulp is 60 ~ 65 ° of SR.
11. application as claimed in claim 9, it is characterized in that：The quality of the first paper pulp, second of paper pulp and the third paper pulp Ratio is 20 ~ 30：65~75：5~10.
12. application as claimed in claim 11, it is characterized in that：The matter of the first paper pulp, second of paper pulp and the third paper pulp Amount ratio is 25：70：5.
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