CN106592321B - The method that a kind of biochemical process ECF bleached kraft pulps of Fast growth poplar prepare paper base material - Google Patents
The method that a kind of biochemical process ECF bleached kraft pulps of Fast growth poplar prepare paper base material Download PDFInfo
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- CN106592321B CN106592321B CN201611256834.4A CN201611256834A CN106592321B CN 106592321 B CN106592321 B CN 106592321B CN 201611256834 A CN201611256834 A CN 201611256834A CN 106592321 B CN106592321 B CN 106592321B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
- D21H11/04—Kraft or sulfate pulp
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- 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
-
- 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
Abstract
The invention discloses the method that a kind of biochemical process ECF bleached kraft pulps of Fast growth poplar prepare paper base material, step is as follows：(1) paper pulp is prepared using the bleaching process of the kraft pulp biochemical process ECF of Fast growth poplar；(2) gradient mashing is carried out to the paper pulp of preparation, obtains the paper pulp of three kinds of beating degrees, wherein：The beating degree of the first paper pulp is in 10 30 ° of SR, and the beating degree of second of paper pulp is in 30 55 ° of SR, and the beating degree of the third paper pulp is in 55 70 ° of SR.Mixed slurry is copied into the type of being made or compression moulding, obtains paper base material.The present invention is using gradient mashing technology and from two key technologies of adding technique, solves the deficiency of single mashing technology in the prior art, avoid the use of additional additive, the paper substrate being prepared has many advantages, such as that folding strength is high, bursting strength is high and tear index, it is suitble to prepare a plurality of types of paper substrates, the preparation of particularly white card body paper paper base material.
Description
Technical field
The invention belongs to pulp technology for making paper, and in particular to a kind of biochemical process ECF bleached kraft pulps 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 been more than 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 has become the main raw material(s) of China's pulp and paper industry, accounts for about
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 continues to increase.Currently, the extensive Fast growth poplar woods of northern China has been begun to take shape, and is the hair of pulp and paper industry
Good raw material has been laid in exhibition.With the development of society and science and technology, traditional paper and cardboard are being prepared using chemical pulp
Meanwhile the new technology that series prepares paper base material is developed, traditional paper industry is widened to new material industry, is traditional papermaking row
One new thinking and approach of industry transition and upgrade.
Since paper pulp fiber is very flexible, unsegregated fibre bundle, these fibre bundles are contained in the paper pulp without mashing
Stiff, what is had is too long, and some is too thick, and shortage is necessary to be prescinded and detach, and such as with its copy paper, then products obtained therefrom is loose, porous, table
Face is coarse, intensity is very low, it is impossible to meet requirement；Therefore, it is necessary to carry out mashing processing, mashing is handled using mechanism
Float on the paper pulp fiber in water, make it have and adapt to produce required characteristic on a papermaking machine, and enable produced paper
Reach the operating process of prospective quality.Good water filtering performance should be had by being beaten the paper pulp fiber obtained, should also make paper pulp
The exposed enough hydroxyls of fiber make molding paper base material possess enough hydrogen bond Covalent bonding togethers, and paper base material is made to form one
A chain-shaped network structure staggeredly, it is ensured that the excellent physical strength of molding paper base material.But existing methods of beating all makes
With single beating degree, the distribution of the length, wire-dividing broom purification degree of the corresponding fiber of different beating degrees is different, it is difficult to ensure simultaneously
Good water filtering performance and physical strength.
In addition, the spectrophotometric datas such as smoothness, opacity to improve paper, will usually add into slurry and fill out
Material, such as precipitated calcium carbonate, powdered whiting or talcum powder, therefore, filler is the second largest raw material in addition to slurry in paper pulp.
But after adding in filler, sizing thickness, deflection and the intensity of paper can all decline, especially by the paper of superpressure, fall bigger.
In addition, the paper of addition filler easily loses powder, hair loss, these shortcomings also need to be made up by intensive and top sizing.
But the addition of a large amount of chemicals, make into and contain chemicals in paper, during Some paper sheets use there are potential security risk,
The addition of some chemicals so that paper is not degradable, and certain harm can be caused to environment.
Present inventor provides a kind of kraft pulp biochemical process ECF bleachings of Fast growth poplar in the research of early period
Technique (ZL201310300120.9), by with the good Fast growth poplar chemical pulp of kraft cooking after biological enzyme pretreatment, so
One section of oxygen delignification O is carried out afterwards1Or one section of reinforced-oxygen bleaching OpOr one section of oxygen delignification O1With one section of reinforced-oxygen bleaching
O2p, D sections of ClO 2 bleaching is then carried out, then chelation treatment Q sections, finally carries out one section of P sections of hydrogen peroxide bleaching, total drift
Sequence is XODQP, XOpDQP、XOpO2pThis bleaching process of DQP, does not generate harmful substance, after bleaching after bleached pulp
Pulp property it is excellent, pulp brightness can reach 86%ISO or so, and, stability higher than the pulp brightness after total chlorine free bleaching is more
It is high.
Invention content
For the above-mentioned prior art, the object of the present invention is to provide a kind of biochemical process ECF of Fast growth poplar to bleach sulfuric acid
The method that salt slurry prepares paper base material.The present invention utilizes the kraft pulp biochemistry of Fast growth poplar on the basis of early-stage study
The high whiteness paper pulp of high-performance that the bleaching process of method ECF obtains for the further paper properties for improving paper pulp, is beaten using gradient
Slurry technology and from adding technique, obtains the new preparation technology of the paper base material of series high strength.
To achieve the above object, the present invention uses following technical proposals：
The first aspect of the present invention, provides a kind of methods of beating of paper pulp, and step is as follows：
(1) paper pulp is prepared using the bleaching process of the kraft pulp biochemical process ECF of Fast growth poplar；
(2) gradient mashing is carried out to the paper pulp of preparation, obtains the paper pulp of three kinds of beating degrees, wherein：The first paper pulp is beaten
The degree of beating is 10-30 ° 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 55-70 ° of SR.
In step (1), the bleaching process referenced patent ZL201310300120.9 of the KP slurry biochemical process ECF of Fast growth poplar
It carries out.
In step (2), it is preferred that beating degree points three kinds, the beating degree of the first paper pulp are 10-25 ° of SR, second of paper pulp
Beating degree for 35-50 ° of SR, the beating degree of the third paper pulp is 60-70 ° of SR.
The second aspect of the present invention, the biochemical process ECF bleached kraft pulps for providing a kind of Fast growth poplar prepare paper base material
The method of material, step are as follows：
(1) it is beaten by the methods of beating of above-mentioned paper pulp, the paper pulp of three kinds of beating degrees is made；
(2) by the first paper pulp, second of paper pulp and the third paper pulp (5-30) in mass ratio：(60-85):(5-20) is mixed
It closes, obtains mixed slurry；
(3) mixed slurry is copied into the type of being made or compression moulding, obtains paper base material.
Preferably, in step (2), by the first paper pulp, second of paper pulp and the third paper pulp (10-25) in mass ratio：
(65-80):(5-10) is mixed.
The paper base material that the above method is prepared is also protection scope of the present invention.
The paper base material is white card body paper paper base material, environmental protection package paper base material and paper for daily use sill.
Wherein, the paper for daily use sill includes：Face tissue, toilet paper, tissue, lens wiping paper etc..
The present invention design concept be：It is difficult to ensure simultaneously asking for water filtering performance and physical strength for single beating degree
Topic, present invention firstly provides being beaten using gradient, the purpose of gradient mashing is to make paper pulp that should be kept when preparing paper base material
The good water filtering performance of paper pulp fiber will also cause the exposed enough hydroxyls of paper pulp fiber that molding paper base material is made to possess enough
More hydrogen bond, Covalent bonding together so that paper base material forms a chain-shaped network structure staggeredly, it is ensured that molding paper base material is excellent
Good physical strength.
In addition, the gradient of the present invention is beaten targeted object starches biochemical process ECF bleaching process for the KP of Fast growth poplar
The paper pulp of preparation, the paper pulp prepared relative to traditional chemical method is more energy saving, this is because paper pulp of the present invention passes through
Cross the processing of zytase, the hemicellulose small part degradation in paper pulp, bleaching liquid deeper into causing fiber softening when being impregnated with,
Easily it is beaten more energy efficient, avoiding problems by the increase of energy consumption that may bring of gradient mashing.
The present invention also to gradient mashing be classified, per level-one mashing when investigation is optimized for the control of beating degree,
As a result, it has been found that：Point three gradients are beaten, and the beating degree control of the first order is 10-30 ° of SR, the paper pulp fiber of this grade of slurry compared with
Long, wire-dividing broom purification lesser extent, certain supporting role is played in paper base material, ensure that in paper base material preparation process
With good water filtering performance；The beating degree control of the second level is 30-55 ° of SR, and the paper pulp fiber of this grade of slurry is cut off, fine
The wire-dividing broom purification of dimension is preferable, and during paper base material is prepared, playing the role of interweaving fibre compact combines, this part paper pulp
The dosage proportion of fiber is maximum, controls more than 60%；The beating degree control of the third level for 55-70 ° of SR, this grade of slurry
The cut-out of fiber in itself is more, and wire-dividing broom purification degree is very high, and fiber attenuates short and small, and the hydroxyl and hydrogen bond exposed is more, is making
During standby paper base material, play the role of the more hydrogen bonds of link intertexture and covalent bond, filling paper base material gap, so as to protect
The integral strength of the paper base material prepared is demonstrate,proved.Above three is beaten the division of gradient, the whole object of the paper base material prepared
Rationality can be more excellent, decreases or increases mashing gradient, the physical property of the paper base material of preparation can all declined.
Moreover, the slurry that beating degree is 55-70 ° of SR also is able to play the role of filling paper base material gap, can replace
The addition of most of chemicals filler during the conventional paper system of copying, manufactured paper base material intensity is high and degradable, avoids
Because paper caused by the addition of filler easily loses powder, hair loss the problem of, and reduce the addition of chemicals so that paper base material
It prepares more environmentally-friendly.
In addition, the slurry of above-mentioned three kinds of beating degrees is mixed, the first paper pulp, second of paper pulp and the third paper pulp
Mass ratio be (10-25)：(65-80):When (5-10), the paper base material of preparation has higher tear index and resistance to broken finger
Number can be adapted for many special occasions and use, the particularly preparation of environmental protection package paper base material.
Due to preparing paper substrate using the mixed slurry of three kinds of beating degrees, cooperative compensating is played between the slurry of different beating degrees
Effect, requirement to beating degree reduces, and can be controlled to avoid conditions of beating bad, the problem of quantitative uneven easily occurs.Due to
The tightness of paper substrate prepared by tradition has larger relationship with the retention of mashing, the addition of filler and filler, if to prepare
A kind of specific paper base material needs to get hold of each link.And the present invention is beaten gradient for specific raw material by regulation and control
Ideal paper base material can be prepared with its respective content, simplifies the preparation flow of paper base material.
Beneficial effects of the present invention are：
(1) paper pulp fiber of different beating degrees is mixed, it is ensured that paper substrate using the method for gradient mashing in the present invention
Material has good water filtering performance in preparation process, and the paper base material being prepared can be made to have higher intensity.
(2) addition of most of chemicals in paper preparation process is replaced using the higher paper pulp fiber of beating degree, makes paper
Preparing for sill is more environmentally-friendly, and the paper base material of preparation is more degradable.
(3) present invention has folding strength height, bursting strength by the paper substrate that the ratio of the slurry of different beating degrees is prepared
The advantages that high and tear index, is suitble to prepare a plurality of types of paper substrates, the preparation of particularly white card body paper paper base material.Bai Ka
The whiteness of paper is high, intensity is big, is bonded by the white card body paper of multilayer, is prepared through multi-roller rolling, is needed after general mashing
Filler and auxiliary agent are added in slurries；And method using the present invention, without adding filler and auxiliary agent, you can art post paperboard is obtained,
The art post paperboard has higher deflection, bursting strength, tear index and smoothness.
Specific embodiment
With reference to specific embodiment, the invention will be further described.
Analysis method employed in the embodiment of the present invention is as follows：
The measure of whiteness：Paper pulp is discongested through fiber after device discongests, and is copied into the scraps of paper on a buchner funnel, after air-drying with YQ-
Z -48BZ -48B whiteness instrument measures；
Folding number：Domestic MIT folding strength testers are measured in.
Burst index：It is measured with the swedish company L＆W Burst Testers produced.
Fracture length：It is measured with the swedish company L＆W anti-tensile testers produced.
Tear index：It is measured with the u s company TMI tearability testers produced.
Remaining experimental method not elaborated is the routine experiment method of this field.
The method that a kind of biochemical process ECF bleached kraft pulps of 1 Fast growth poplar of embodiment prepare paper base material, the implementation
Example prepares white card body paper paper base material.
Step is as follows：
(1) using patent ZL201310300120.9, " a kind of kraft pulp biochemical process ECF of Fast growth poplar bleaches work
The high-performance element-free chlorine Fast growth poplar bleach chemical pulp that skill " technology obtains, pulp brightness 86.5%ISO take three parts of paper pulp to utilize
PFI mills carry out accurate defibrination so that the beating degree of paper pulp is 20 ° of SR, 45 ° of SR, 60 ° of SR respectively.
The specific preparation method of above-mentioned whiteness 86.5.0%ISO paper pulp is as follows：
1) boiling：Take the Fast growth poplar wood chip of 15~25mm of length, 10~20mm of width, 3~5mm of thickness, after natural air drying,
Boiling is carried out, Fast growth poplar sulfate magma is made, the condition of boiling is：Alkali charge 20%, to over dry raw material, Na2O is counted；Vulcanization
Degree 24%, liquor ratio 1:4,165 DEG C of boiling maximum temperature carries out deflation 15min at 105 DEG C, heating-up time 120min, during heat preservation
Between 90min；It carries out fully washing after boiling, screen, obtain paper pulp.
2) xylanase pretr eatment：It is 10% to adjust pulp density, then with zytase X1、X2Or X3It is handled,
In processing procedure, rubbed at interval of 10~15min primary；It is taken out after processing, is put into 10min in boiling water bath, loses zytase
It is living to terminate reaction, clean paper pulp with tap water.The zytase X1、X2Or X3The concrete technology condition handled is as follows：X1
The process conditions of processing：Enzyme dosage 8IU/L, 50~55 DEG C, pH8, time 120min of temperature；X2The process conditions of processing：Enzyme is used
Measure 6IU/g, 55~60 DEG C of temperature, pH8~9, time 120min；X3The process conditions of processing：Enzyme dosage 8IU/g, temperature 50 C,
PH8~9, time 120min.
3) ECF is bleached：It is above-mentioned to be bleached by the paper pulp of enzymatic treatment, bleaching process ODQP, OPDQP or O1O2PDQP
The step of three kinds of drift one of sequences, bleaching process is：First, deoxidation lignin is carried out to the paper pulp by enzymatic treatment or strengthens deoxidation wood
Element；After oxygen delignification, paper pulp is washed, then carries out D sections of ClO 2 bleachings；D sections of ClO 2 bleachings terminate
Afterwards, paper pulp is washed, then carries out Q sections of chelation treatments；After Q sections of chelation treatments, paper pulp is washed, Ran Houjin
P sections of H of row2O2Bleaching is completed.
(2) the standby paper pulp fiber starched of mashing or defibrination according to 20 ° of SR of beating degree, 45 ° of SR, 60 ° of SR paper pulp fiber
Raw Material Blending Ratio 15:70:15 (mass ratioes) are discongested device and discongested through fiber makes it uniformly mix, and is then pressed on sheet forming apparatus
Type 120g/m is made2White card body paper paper base material.
(3) at the same time, 100% paper pulp fiber raw material of 45 ° of SR of selection beating degree, discongesting device through fiber and discongest makes it
It uniformly mixes, then the compression moulding 120g/m on sheet forming apparatus2White card body paper paper base material, does comparative sample use.
(4) by the molding 120g/m of 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 measures the object of paper base material
Manage intensity.
(5) the indices such as table 1 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 bleached kraft pulps of 1 Fast growth poplar of table prepare white card body paper paper base material physical performance index
Compare
The method that a kind of biochemical process ECF bleached kraft pulps of 2 Fast growth poplar of embodiment prepare paper base material, the implementation
Example prepares white card body paper paper base material.
Step is as follows：
(1) paper pulp prepared using embodiment 1 takes three parts of paper pulp to carry out accurate defibrination using PFI mills so that paper pulp is beaten
The degree of beating is 25 ° of SR, 45 ° of SR, 65 ° of SR respectively.
(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 Blending Ratio 15:80:5 (mass ratioes) are discongested device and discongested through fiber makes it uniformly mix, and is then pressed on sheet forming apparatus
Type 150g/m is made2White card body paper paper base material.
(3) at the same time, 100% paper pulp fiber raw material of 45 ° of SR of selection beating degree, discongesting device through fiber and discongest makes it
It uniformly mixes, then the compression moulding 150g/m on sheet forming apparatus2White card body paper paper base material, does comparative sample use.
(4) by the molding 150g/m of both the above2White card body paper paper base material, which is put on electrothermal drying cylinder, is dried, then
The moisture that environmentally friendly wrapping paper sill is balanced in drier is put into, makes its water tariff collection 8%, then measures the object 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 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 physical property that the biochemical process ECF bleached kraft pulps of 2 Fast growth poplar of table prepare environmental protection package paper base material refers to
Mark compares
The method that a kind of biochemical process ECF bleached kraft pulps of 3 Fast growth poplar of embodiment prepare paper base material, the implementation
Example prepares environmental protection package paper base material.
Step is as follows：
(1) paper pulp prepared using embodiment 1 takes three parts of paper pulp to carry out accurate defibrination using PFI mills so that paper pulp is beaten
The degree of beating 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 mixed proportion 15:70:15 (mass ratioes) are discongested device and discongested through fiber makes it uniformly mix, then in sheet forming apparatus
Upper compression moulding 130g/m2Environmental protection package paper base material.
(3) at the same time, 100% paper pulp fiber raw material of 40 ° of SR of selection beating degree, discongesting device through fiber and discongest makes it
It uniformly mixes, then the compression moulding 130g/m on sheet forming apparatus2Environmental protection package paper base material does comparative sample use.
(4) by the molding 130g/m of both the above2Environmental protection package paper base material is put on electrothermal drying cylinder and is dried, then
The moisture that environmentally friendly wrapping paper sill is balanced in drier is put into, makes its water tariff collection 8%, then measures the object of paper base material
Manage intensity.
(5) the indices such as table 3 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 physical property that the biochemical process ECF bleached kraft pulps of 3 Fast growth poplar of table prepare environmental protection package paper base material refers to
Mark compares
The method that a kind of biochemical process ECF bleached kraft pulps of 4 Fast growth poplar of embodiment prepare paper base material, the implementation
Example prepares paper for daily use sill.
Step is as follows：
(1) paper pulp prepared using embodiment 1 takes three parts of paper pulp to carry out accurate defibrination using PFI mills so that paper pulp is beaten
The degree of beating is 15 ° of SR, 35 ° of SR, 55 ° 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, 55 ° of SR paper pulp
Fibrous raw material mixed proportion 20:70:10 (mass ratioes) are discongested device and discongested through fiber makes it uniformly mix, then in sheet forming apparatus
Upper compression moulding 30g/m2Paper for daily use sill.
(3) at the same time, 100% paper pulp fiber raw material of 35 ° of SR of selection beating degree, discongesting device through fiber and discongest makes it
It uniformly mixes, then the compression moulding 30g/m on sheet forming apparatus2Paper for daily use sill does comparative sample use.
(4) by the molding 30g/m of both the above2Paper for daily use sill is put on electrothermal drying cylinder and is dried, Ran Houfang
The moisture of balanced life paper base material into drier makes its water tariff collection 8%, and the physics for then measuring 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 biochemical process ECF bleached kraft pulps of 4 Fast growth poplar of table prepare the physical performance index of paper for daily use sill
Compare
The method that a kind of biochemical process ECF bleached kraft pulps of 5 Fast growth poplar of embodiment prepare paper base material, the implementation
Example prepares paper for daily use sill.
Step is as follows：
(1) paper pulp prepared using embodiment 1 takes three parts of paper pulp to carry out accurate defibrination using PFI mills so that paper pulp is beaten
The degree of beating 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 mixed proportion 15:75:10 (mass ratioes) are discongested device and discongested through fiber makes it uniformly mix, then in sheet forming apparatus
Upper compression moulding 35g/m2Paper for daily use sill.
(3) at the same time, 100% paper pulp fiber raw material of 40 ° of SR of selection beating degree, discongesting device through fiber and discongest makes it
It uniformly mixes, then the compression moulding 35g/m on sheet forming apparatus2Paper for daily use sill does comparative sample use.
(4) by the molding 35g/m of both the above2Paper for daily use sill is put on electrothermal drying cylinder and is dried, Ran Houfang
The moisture of balanced life paper base material into drier makes its water tariff collection 8%, and the physics for then measuring paper base material is strong
Degree.
(5) the indices such as table 5 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 biochemical process ECF bleached kraft pulps of 5 Fast growth poplar of table prepare the physical performance index of paper for daily use sill
Compare
Embodiment 6：
To ensure the comparativity of paper properties, two methods are respectively adopted as raw material in the paper pulp prepared using in embodiment 1
It is tested, it is specific as follows：
Method one：Three parts of paper pulp is taken to carry out accurate defibrination using PFI mills so that the beating degree of paper pulp be respectively 25 ° of SR,
45 ° of SR, 65 ° of SR, are in mass ratio 20:70:10 are mixed, and mixed slurry is made, then copies and quantification of 60g/m is made2's
Paper.
Method two：Paper pulp is subjected to accurate defibrination using PFI mills so that the beating degree of paper pulp is 45 ° of SR, then copies and is made
Quantification of 60g/m2Paper.
The physical properties such as its folding strength, bursting strength, tear index, fracture length are detected, as a result such as table 6.
Table 6：Paper properties compare
Although the above-mentioned specific embodiment for combining the present invention is described, not to the limit of invention protection domain
System, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art do not need to pay
It is still within the scope of the present invention to go out the various modifications or changes that creative work can be made.
Claims (7)
1. the method that a kind of biochemical process ECF bleached kraft pulps of Fast growth poplar prepare paper base material, which is characterized in that step
It is as follows：
（1）Paper pulp is beaten, the paper pulp of three kinds of beating degrees is made；
（2）By the first paper pulp, second of paper pulp and the third paper pulp in mass ratio（5-30）：（60-85）:（5-20）Mixing,
Obtain mixed slurry；
（3）Mixed slurry is copied into the type of being made or compression moulding, obtains paper base material；
Step（1）In, it is as follows that the methods of beating includes step：
1）Paper pulp is prepared using the bleaching process of the kraft pulp biochemical process ECF of Fast growth poplar；
2）Gradient mashing is carried out to the paper pulp of preparation, obtains the paper pulp of three kinds of beating degrees, wherein：The beating degree of the first paper pulp is
10-30 ° 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 55-70 ° of SR.
2. according to the method described in claim 1, it is characterized in that, step 2）In, three kinds of beating degree point, 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 35-50 ° of SR, and the beating degree of the third paper pulp is 60-70 ° of SR.
3. according to the method described in claim 1, it is characterized in that, step（2）In, by the first paper pulp, second of paper pulp and
The third paper pulp is in mass ratio（10-25）：（65-80）:（5-10）Mixing.
4. the paper base material that claim 1-3 any one of them methods are prepared.
5. paper base material according to claim 4, which is characterized in that the paper base material is white card body paper paper base material, ring
Protect packaging paper base material and paper for daily use sill.
6. paper base material according to claim 5, which is characterized in that the paper base material is white card body paper paper base material.
7. paper base material according to claim 5, which is characterized in that the paper for daily use sill includes：Face tissue, health
Paper, tissue and lens wiping paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611256834.4A CN106592321B (en) | 2016-12-30 | 2016-12-30 | The method that a kind of biochemical process ECF bleached kraft pulps of Fast growth poplar prepare paper base material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611256834.4A CN106592321B (en) | 2016-12-30 | 2016-12-30 | The method that a kind of biochemical process ECF bleached kraft pulps of Fast growth poplar prepare paper base material |
Publications (2)
| Publication Number | Publication Date |
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| CN103343472A (en) * | 2013-07-17 | 2013-10-09 | 齐鲁工业大学 | Biochemical-method ECF (Extracellular Fluid) bleaching process for KP (Kraft Pulp) of fast growing poplars |
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| CN103343472A (en) * | 2013-07-17 | 2013-10-09 | 齐鲁工业大学 | Biochemical-method ECF (Extracellular Fluid) bleaching process for KP (Kraft Pulp) of fast growing poplars |
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