CN102051833B - Preparation method of straw matter mechanical pulp - Google Patents
Preparation method of straw matter mechanical pulp Download PDFInfo
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- CN102051833B CN102051833B CN 201010543703 CN201010543703A CN102051833B CN 102051833 B CN102051833 B CN 102051833B CN 201010543703 CN201010543703 CN 201010543703 CN 201010543703 A CN201010543703 A CN 201010543703A CN 102051833 B CN102051833 B CN 102051833B
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Abstract
The invention relates to a preparation method of straw matter mechanical pulp, comprising the following steps of: (1) preparing a straw raw material; (2) adding a certain amount of water to the straw raw material to ensure that the concentration by weight percentage of a straw raw material water solution is 10-60%; and (3) heating the water solution concentrated in the step (2) to the temperature higher than 140 DEG C, and softening lignin and pulping. The pulp prepared with the preparation method can be used for preparing paper with favorable softness without adding any softening agent and is especially suitable for making crepe paper.
Description
Technical field
The present invention relates to a kind of manufacturing approach of utilizing the straw-like materials mechanical pulp, belong to pulp technology for making paper.
Background technology
Paper product is daily necessities indispensable in the human daily life, and papermaking is an industry that investment is big, energy consumption is high, seriously polluted, raw materials consumption is bigger.As far as paper industry, raw material resources are the most key problems.At present, what paper making raw material generally adopted is timber, but the timber that can cut down as paper making raw material generally all needs the age of tree at least 30 years, the particularly anxiety so the supply of paper making raw material just seems.In order to address the above problem; China has implemented the medium-term and long-term development plan of " the living poplar of extensive development speed; it is integrated to carry out woods slurry paper " at northern area, built the living poplar papermaking of a collection of speed woods base, and it has alleviated the particularly nervous situation of paper making raw material supply to a certain extent; But give birth to Yang Shengchang for this speed, its growth cycle also need just can reach at least in 10 years can cut down the age of tree, so it can't fundamentally solve paper making raw material problem in short supply equally.
In addition; Use timber as paper making raw material; After forming paper pulp in order to improve the paper aesthetic property; All adopt bleaching process that paper is bleached processing, no matter be bleachings such as element chlorine free bleaching technology (being called for short the ECF technology) comparatively advanced in traditional chlorine bleach or the prior art and ozone, hydrogen peroxide, biology enzyme, in the waste water after the bleaching processing, all contain certain content absorbed organohalogen compounds (Absorbable Organic Halogen---AOX); There is certain side effect in the existence of this material to human body, so this content of material has been worked out one of quality detecting index for paper.
Because the lignin content in the wood type fiber is very high, and structure is tight, when the wood type fiber was carried out slurrying, energy consumption was very big; Lignin content in the straw plant fiber is low than the wood type fiber, and short texture, so when it was carried out slurrying, energy consumption was low; So except that the timber paper making raw material, straw-like materials is used as paper making raw material and uses in the prior art.Especially China is the big producing country of rice class and wheat; Straw class resource is very abundant; If can this a part of resource be made full use of, so not only can increase peasant's income, nor can be owing to need straw-like materials carried out burning disposal and atmospheric environment is polluted.
In the prior art; Chinese patent document CN101718049A just discloses a kind of clean pulping process for straws by mechanical method; This technology utilization stalk is as pulping raw material, utilizes that lignin makes fiber obtain separation at a certain temperature by the characteristic of glass transition for soft partially rubbery state between fiber.This technology comprises the steps:
The first, chopping is got the raw materials ready, and on stalk, adds water and carry out wettingly, and piles up the nature saccharification;
The second, the stalk after the nature saccharification is delivered in the stalk preprocessor adds entry, stalk is carried out moistening, swelling, and utilize the inner blade of preprocessor that stalk is carried out further size degradation;
Three, will be moistening through above-mentioned steps, the stalk water mixed liquid after the swelling, size degradation is transported to spiral dewater and carries out processed; It is 38～42% o'clock that water takes off stalk water mixed liquid weight percent concentration, stalk is sent in the stalk disassembler again it is carried out lignin degradation; Wherein, the stalk disassembler adopts two mill settings, wherein; Fixed millstone adopts nonmetal boart boart mill, and movable grinding disc adopts the steel mill, under the rubbing action of two-layer mill; Can produce 120～140 degrees centigrade high temperature in the mill; Thereby the moisture that makes forage carry becomes steam condition, is equivalent to the effect of boiling, thereby makes lignin in the stalk soften and degrade;
Four, will the stalk water mixed liquid behind lignin degradation carry out stalk and unfold processing, the laggard row filter of defibrination obtains good slurry, anhydrates afterwards, obtains the finished product slurry.
Adopt the softening or degradation treatment temperature of above-mentioned 120～140 ℃ lignin in this technology; Making lignin in the paper making raw material such as stalk appear by glass transition is the situation of inclined to one side soft rubber attitude; Need to prove the category of the glassy state that said soft partially rubbery state still belongs to field of papermaking and defined.The usual understanding of those skilled in the art is; When the lignin in paper making raw material appears by glass transition for the situation of soft partially rubbery state; Promptly can realize bonding between the fiber through the said lignin that is rubbery state; Thereby obtain the adhesion between the neither big nor small fiber, so just can utilize this neither big nor small adhesion to prepare fluting medium, spool fiber board and disposable tableware described in above-mentioned technology with big hardness.
As everyone knows, the preparation key of paper pulp is the softening processing to paper making raw material, promptly to the softening or degradation treatment of lignin, will consider the characteristic of fiber material when lignin is carried out above-mentioned processing.Microfibre in the straw plant fiber then be with the fiber axis be the center in the shape of a spiral shape closely be wound on the fiber axis; The arrangement of this arrangement mode microfibre in the wood type fiber along fiber axis to almost parallel arrangement mode; Make microfibre be difficult to fibrillating (being usually said " going out hair "); Owing to its fibrillating is had certain degree of difficulty,, is difficult for fibrillating so the adhesion between the fiber should be low than the wood type fiber according to basic principle; But because the straw plant fiber has bigger length-width ratio from its profile, so the adhesion that shows between the fiber is not low yet.In addition, be provided with intercellular layer between the cell membrane of fiber and fiber, wherein, the lignin concentration of intercellular layer is the highest.In the straw plant fiber; Also include in the intercellular layer than the more hemicellulose of wood type fiber; Because hemicellulose can provide a large amount of hydroxyls; The existence of hydroxyl provides the condition of hydrogen bonded, makes that the adhesion between the fiber improves, so the fiber combining power that yet makes the straw plant fiber show is not low.
In the process of pulp preparation,, still carry out semichemical pulping or chemical-mechanical pulping no matter be to carry out machinery pulping; The treatment step that all need relate to machinery pulping comes defibrating; When carrying out this machinery pulping, the temperature that the softening or degradation treatment of lignin in the paper making raw material stalk is selected all is 120～140 ℃, and to those skilled in the art; It is when utilizing paper making raw material to carry out slurrying; All be to adopt such as 120～140 ℃ lignin treatment temperature in the above-mentioned technology, this point is the common practise of pulp technology for making paper, also is the unified technological means that generally adopts of field of papermaking for many years." also clearly put down in writing " the time of decatize before the temperature that the form of fiber separation depends on system during defibrination and the defibrination; if be higher than lignin vitrification point (120～135 ℃) defibrination; then the separation of fiber is between the primary wall and intercellular layer of cell membrane; the fiber surface of generation is smooth like this, the lignin that is hardened by one deck is covered with in the 175th page of the pulping and paper-making handbook what China Light Industry Press published.If yet being lower than defibrination under the lignin vitrification point, fiber mainly separates in primary wall, and fiber surface is coarse like this; Have more cellulose character ", from above-mentioned record content, explain, when lignin is softened processing; be higher than the above defibrination of lignin vitrification point; the fiber surface after the separation is too smooth, and the adhesion between the fiber is not strong, so be inappropriate for papermaking; The slurry that only has cellulose character just is suitable for papermaking.
Owing to adopt the softening treatment temperature of above-mentioned lignin; Make that the burble point of the pulp fiber of preparation mechanical is not to be arranged in the highest intercellular layer of lignin concentration under this condition, so fiber is prone to be cut off, and it is higher to process the fibre bundle content of slurry; So prepare the stronger paper of flexibility that uses in the daily life if use above-mentioned finished product to starch; Such as sanitary paper, in the so above-mentioned finished product slurry between the fiber bigger adhesion then can't satisfy its demand to flexibility, so just have in the finished product slurry, add a certain amount of softener to stop interfibrous excessive combination; The interpolation of softener has improved the cost of papermaking on the one hand; As the use of the softener of chemical reagent, in fact human body skin also there is certain side effect on the other hand, especially is not suitable for easy allergic constitution.
The applicant is through discovering, above-mentioned characteristic is applicable to the wood type fiber fully, and for the straw plant fiber, can utilize above-mentioned characteristic to prepare flexible good paper fully and use paper pulp.
Summary of the invention
Technical problem to be solved by this invention is when utilizing straw-like materials as paper making raw material in the prior art; Being chosen in 120～140 ℃ softens or degradation treatment lignin; Adhesion in the finished product slurry that obtains after under this temperature, handling between the fiber is stronger; Need to add softener and just can make flexible stronger paper; The interpolation of defective softener is easy to cause the human allergy, and the interpolation of softener also improved the manufacturing cost of paper, and then provides a kind of and need not extra adding softener and just can obtain the blank preparation technics that flexible stronger paper for daily use is opened.
For solving the problems of the technologies described above, the invention provides a kind of preparation method of stalk class slurry, it comprises the steps:
(1) stalk raw materials is got the raw materials ready and transfer dense processing;
(2) stalk raw materials after step (1) is handled is carried out at least one section machinery pulping, the temperature of said machinery pulping is regulated, the temperature when guaranteeing at least one section machinery pulping is softened also machinery pulping greater than 140 ℃ to lignin.
In said step (1), in stalk raw materials, add certain water gaging, said stalk raw materials is transferred dense, to the weight percent concentration of the said stalk raw materials aqueous solution be 10～60%.
In said step (2), the temperature during said machinery pulping is greater than or equal to 145 ℃.
Temperature during said machinery pulping is preferably 150～180 ℃.
In said step (1), one or both in the stalk raw materials after accent is dense in adding chemical treatments or the enzyme finishing agent carry out chemistry or biological treatment to it.
Chemical treatment ℃ is carried out in heating-up temperature to 80～180, ℃ carries out a biological disposal upon in heating-up temperature to 30～100, and the processing time is 5min～2h.
In said step (2), add vapours and exchange the adjusting that heats up of stalk raw materials after dense.
In conjunction with the heat release of mechanical defibrating, the temperature when externally exchanging stalk raw materials after dense under the thermal source effect and being warming up to machinery pulping during at least one section machinery pulping is greater than 140 ℃.
With transferring the stalk raw materials after dense to join in the mechanical disassembler, and input temp is 100～130 ℃ a steam in said mechanical disassembler, in said disassembler, under the rotation exothermic effects of mill, steam further is warming up to greater than 140 ℃.
Said slurry is used to prepare crepe paper.
The preparation method of stalk class slurry of the present invention at first will be to the raw material processing of getting the raw materials ready, so that raw material can successfully be put into the follow-up equipment that carries out preliminary treatment and decomposition; In the stalk raw materials of getting ready, add certain water gaging then; Transfer dense processing, wherein the addition of water is conditional, is 10～60% to be as the criterion to add behind the water weight percent concentration of mixed liquor; Its addition can not be too big or too little, otherwise can't prepare the suitable slurry of concentration; The temperature of stalk raw materials aqueous solution temperature adjustment after at last will be with above-mentioned accent dense during to machinery pulping is greater than 140 ℃; Under this temperature, lignin being softened and carry out machinery pulping handles; Wherein, set the above-mentioned temperature that is higher than the lignin vitrification point lignin is softened, lignin becomes the slightly liquid state of thickness; Make its restraining force diminish to fiber; Thereby make that when slurrying the separation of fiber is between the primary wall of cell membrane and intercellular layer, to carry out, the fiber surface that generates like this by one deck slightly the liquid lignin of thickness be covered with; The liquid lignin of above-mentioned slightly thickness is being solidificated in after the cooling on the fiber surface, has stoped the adhesion between the fiber to make it not too large; Also little just because of this adhesion, thus the flexibility of paper also just guaranteed.Simultaneously, because the length-width ratio of straw plant fiber is bigger, that is to say that its fiber is very thin, so above-mentioned little adhesion also is enough to satisfy the working strength of this fibrid.
The present invention has the advantage that is described below:
(1) preparation method of stalk class slurry of the present invention; Be set in and be higher than the lignin vitrification point promptly greater than under 140 ℃ the condition lignin being softened processing and machinery pulping; Because the lignin of stalk raw materials has surmounted the category of glassy state under this temperature, has become the liquid that has a little viscosity, this moment, the existence of liquid lignin reduced for the restraining force between the fiber; The adhesion that shows as between the raw fiber reduces; The raw fiber made from this understanding is difficult for cutting off, and the length-width ratio of the raw fiber of promptly processing is maximum, and the energy consumption of machinery pulping is also minimum; In addition, the paper that utilizes this pulp preparation to obtain need not to add softener promptly can possess fabulous flexibility, thereby has reduced the cost that paper is made, and has avoided in the paper chemical addition agent to the side effect of human body.
(2) preparation method of stalk class slurry of the present invention; Can select to transfer the stalk raw materials aqueous solution after dense to join in the disassembler; And input temp is 100～130 ℃ a steam in said disassembler; In said disassembler, under the rotation exothermic effects of mill, steam further is warming up to greater than 140 ℃.During defibrination; Charging into temperature to said disassembler inside is 100～130 ℃ vapours, but the vapours of this temperature can not satisfy the design temperature of wanting required for the present invention, but after disassembler is opened; Its inner mill rotation carrying out defibrination; Mill work heating this moment, thus further improved the temperature of disassembler internal heat steam, through test shows its can be so that the vapours temperature reaches more than 140 ℃.Can guarantee promptly that under this temperature intrastitial lignin surmounts the category of glassy state, become the liquid that has a little viscosity, the liquid state that this moment, lignin became thickness makes the adhesion between the fiber reduce, and guarantees that fiber has flexibility preferably.
(3) slurry for preparing of the preparation method through stalk class slurry of the present invention, the adhesion between the fiber is less, so its be easy to destroy the adhesion between the fiber through scraper, thereby be more suitable for making the higher crepe paper of pliability; In addition, much all need be through wrinkling certain pliability of paper and the bulking intensity of giving, so the preparation method of stalk class slurry of the present invention is suitable for preparing above-mentioned paper too such as toilet paper, face tissue, napkin paper, toilet paper etc.
(4) preparation method of stalk class slurry of the present invention, it does not carry out any chemical bleaching to slurry handles, because bleaching agent commonly used mostly belongs to alkaline reagent; Especially for daily paper, alkaline reagent provides alkaline environment to human body, and alkaline environment is unfavorable for suppressing fungi; The present invention does not add any bleaching agent; Thereby guaranteed the wholesomeness and the security of daily paper, also reduced cost simultaneously, can not pollute environment.
The specific embodiment
The present invention will combine following examples that the preparation method of stalk class slurry of the present invention is further described:
Embodiment 1
The preparation method of stalk class described in this embodiment machinery slurry comprises the steps: that (1) get the raw materials ready, and stalk raw materials is sent in the shredder, said stalk raw materials is carried out chopping handle;
Stalk raw materials after chopping is put into preprocessor, and add water in the stalk raw materials after said chopping and transfer dense processing, make that the weight percent concentration of the aqueous solution of said stalk raw materials is 10%;
(2) will join in the mechanical disassembler through the raw material after step (1) accent is dense; Open said mechanical disassembler, and input temp is 100 ℃ a steam in said mechanical disassembler, in said mechanical disassembler under the turning effort of mill; Open in the short time of back at said mechanical disassembler; Temperature in the said mechanical disassembler has just reached 145 ℃, under this temperature, said stalk raw materials is carried out the softening and machinery pulping of lignin, obtains mechanical slurry.
Embodiment 2
The preparation method of stalk class described in this embodiment machinery slurry comprises the steps: that (1) get the raw materials ready, and stalk raw materials is sent in the shredder, said stalk raw materials is carried out chopping handle;
Stalk raw materials after chopping is put into preprocessor, and add water in the stalk raw materials after said chopping and transfer dense processing, make that the weight percent concentration of the aqueous solution of said stalk raw materials is 20%;
(2) will transfer the raw material after dense to join in the mechanical disassembler through step (1), heating-up temperature to 150 ℃ be carried out the softening and machinery pulping of lignin to said stalk raw materials under this temperature, obtain mechanical slurry.
Embodiment 3
The preparation method of stalk class described in this embodiment machinery slurry comprises the steps: that (1) get the raw materials ready, and stalk raw materials is sent in the shredder, said stalk raw materials is carried out chopping handle;
Stalk raw materials after chopping is put into preprocessor, and add water in the stalk raw materials after said chopping and transfer dense processing, make that the weight percent concentration of the aqueous solution of said stalk raw materials is 30%;
(2) will join in the mechanical disassembler through the raw material after step (1) accent is dense, open said mechanical disassembler, utilize mill that stalk raw materials is carried out first section mechanical jordaning; Afterwards; Input temp is 130 ℃ a steam in said mechanical disassembler; In said mechanical disassembler under the rotation exothermic effects of mill; Temperature in the said mechanical disassembler has just reached 160 ℃, and it is softening and carry out second section mechanical jordaning under this temperature, said stalk raw materials to be carried out lignin, obtains mechanical slurry;
(3) the mechanical slurry that obtains in the said step (2) is cleaned; To put into pressurized screen through the slurry after cleaning screens; And will put into press master through the good slurry after the screening, said good slurry is carried out processed, the mechanical slurry after the dehydration back obtains to make with extra care.
Embodiment 4
The preparation method of stalk class described in this embodiment machinery slurry comprises the steps: that (1) get the raw materials ready, and stalk raw materials is sent in the shredder, said stalk raw materials is carried out slitting handle;
Stalk raw materials behind slitting is put into preprocessor, and add water in the stalk raw materials after said chopping and transfer dense processing, make that the weight percent concentration of the aqueous solution of said stalk raw materials is 60%;
(2) will join in the mechanical disassembler through the raw material after step (1) accent is dense; Open said mechanical disassembler, and input temp is 130 ℃ a steam in said mechanical disassembler, in said mechanical disassembler under the turning effort of mill; Open in the short time of back at said mechanical disassembler; Temperature in the said mechanical disassembler has just reached 180 ℃, under this temperature, said stalk raw materials is carried out the softening and machinery pulping of lignin, obtains mechanical slurry;
(3) the mechanical slurry that obtains in the said step (2) is cleaned; Above-mentioned slurry after cleaning is carried out concentration, is 20% until the weight percent concentration of the slurry after concentrating, and the slurry after will concentrating is at this moment put into mechanical disassembler and carried out further defibrination; Repeat at least once said step (2); The mechanical slurry that will finally obtain afterwards cleans once more, and will put into pressurized screen through the slurry after cleaning and screen, and will put into press master through the good slurry after the screening; Said good slurry is carried out processed, the mechanical slurry after the dehydration back obtains to make with extra care.
Embodiment 5
The preparation method of the said stalk class semi-chemical pulp material that provides among this embodiment; Said semi-chemical pulp material is meant that delignification is abundant inadequately in the chemical steaming operation; Fiber separates fully, need carry out mechanical treatment subsequently and the paper pulp that makes, and this method comprises the steps:
(1) gets the raw materials ready, stalk raw materials is sent in the shredder, said stalk raw materials is carried out chopping handle;
Stalk raw materials after chopping is put into preprocessor, and add water in the stalk raw materials after said chopping and transfer dense processing, make that the weight percent concentration of the aqueous solution of said stalk raw materials is 10～60%; In the above-mentioned stalk raw materials aqueous solution after accent is dense, add chemical treatments it is carried out the chemical treatment delignification; In this processing procedure, can select to carry out at normal temperatures; Also can heating-up temperature to 80～180 ℃ carry out chemical steaming and handle 5min～2h, wherein this temperature is preferably 100～150 ℃.
Wherein, what said chemical treatments adopted is alkalescence or the acidic treatment agent of using in the prior art, wherein basic treatment agent of using such as NaOH more.
(2) will join in the mechanical disassembler through the raw material after step (1) accent is dense, this aqueous solution temperature adjustment to temperature greater than 140 ℃, is softened and and machinery pulping lignin.
When if desired the temperature in the mechanical disassembler being heated up in the present embodiment, select to use vapours to heat up.
Also can in said mechanical disassembler, be merely 100～130 ℃ steam by input temp; In said mechanical disassembler under the turning effort of mill; Open in the short time of back at said mechanical disassembler; Temperature in the said mechanical disassembler just can reach more than 145 ℃, just can under this temperature, carry out the softening or degraded of lignin to said stalk raw materials, obtains the semi-chemical pulp material.
Embodiment 6
The preparation method of the said stalk class chemical machinery slurry that provides among this embodiment, said chemical machinery slurry is meant and adopts chemical treatment and machinery mill to separate the paper pulp that makes that this method comprises the steps:
(1) gets the raw materials ready, stalk raw materials is sent in the shredder, said stalk raw materials is carried out chopping handle;
Stalk raw materials after chopping is put into preprocessor, and add water in the stalk raw materials after said chopping and transfer dense processing, make that the weight percent concentration of the aqueous solution of said stalk raw materials is 10～60%; In the above-mentioned stalk raw materials aqueous solution after accent is dense, add the chemical treatments described in the previous embodiment 5 it is carried out the chemical treatment delignification, the processing time is for handling 5min～2h.When carrying out above-mentioned chemical treatment, the temperature in the time of also can selecting to be provided with said chemical treatment is not for being higher than 150 ℃.
(2) will join in the mechanical disassembler through the raw material after step (1) accent is dense, this aqueous solution is warming up to temperature greater than 140 ℃, lignin is softened and and machinery pulping.
Select in the present embodiment to use vapours to heat up.
Also can in said mechanical disassembler, be merely 100～130 ℃ steam by input temp; In said mechanical disassembler under the turning effort of mill; Open in the short time of back at said mechanical disassembler; Temperature in the said mechanical disassembler just can reach more than 140 ℃, just can under this temperature, carry out the softening or degraded of lignin to said stalk raw materials, obtains the chemical machinery slurry.
From the foregoing description, can see; The method of utilizing stalk raw materials to prepare slurry of the present invention; Not only go for the preparation of pure mechanical pulp; And be applicable to the preparation of semi-chemical pulp or chemi-mechanical pulp; So long as utilize the straw plant fiber, so just can use and of the present inventionly lignin softened the processing method of handling being higher than more than the stalk raw materials lignin vitrification point, thereby obtain the fabulous slurry of flexibility as relating to machinery pulping in steps in pulping raw material and the preparation process.And pulping process of the present invention more is applicable to the preparation of pure mechanical pulp.
The predecomposition machine and the mechanical disassembler that use in the above-described embodiments are the commercially available prod, and arbitrary commercially available this series products all is suitable for.
As embodiment that can conversion; Also can adopt the enzyme finishing agent to replace chemical treatments perhaps in said chemical treatments, to add a certain amount of enzyme finishing agent in the above-described embodiments carries out a biological disposal upon; When carrying out a biological disposal upon; Can carry out at normal temperatures, also can be chosen in temperature and be under 30～100 ℃ the environment and carry out, the reaction time is preferably 5min～2h.
Experimental example
Base set: adopt described 145～155 ℃ of machinery pulpings of the embodiment of the invention to carry out slurrying, with the crepe paper of manufacturing paper with pulp after the slotted screen screening of the slurry for preparing through 0.15mm; The paper quality each item standard that records is:
Quantitatively: 22g/cm
2
Tensile strength (in length and breadth to average): 65N/m
Pliability (in length and breadth to average): 290mN
Contrast groups: carry out slurrying according to the embodiment in the base set equally, just the temperature of machinery pulping is 125～135 ℃, equally with the crepe paper of manufacturing paper with pulp after the slotted screen screening of the slurry for preparing through 0.15mm;
Quantitatively: 22g/cm
2
Tensile strength (in length and breadth to average): 66N/m
Pliability (in length and breadth to average): 560mN
Relatively can find out from above-mentioned data; The tensile strength of the paper that the pulp preparation that obtains after the same employing of the one-tenth paper tensile strength high-temperature machinery slurrying of the paper that the pulp preparation that obtains behind the employing low temperature machinery pulping obtains obtains is basic identical; Explanation is protected finely to fiber when high-temperature machinery slurrying; The length-width ratio of fiber is maximum during pulping; The power that interweaves naturally when processing paper like this between the fiber has remedied the reduction of the paper strength that the minimizing of hydrogen bonded quantity causes between fiber; Because the minimizing of bonding quantity between fiber when becoming paper, so become the twice (the pliability test number is high more, become paper pliability poor more) of paper pliability when becoming during the low temperature machinery pulping pliability of paper to be approximately high-temperature machinery slurrying.
Though the present invention has carried out detailed elaboration through above-mentioned specific embodiment to it; But; Any form that does not exceed the claim protection domain that those skilled in the art should be understood that on this basis to be made and the variation of details all belong to invention which is intended to be protected.
Claims (13)
1. the preparation method of a stalk class slurry, it comprises the steps:
(1) stalk raw materials is got the raw materials ready, in stalk raw materials, adds certain water gaging, said stalk raw materials is transferred dense, to the weight percent concentration of the said stalk raw materials aqueous solution be 10～60%;
(2) stalk raw materials after step (1) is handled is carried out at least one section machinery pulping, the temperature when guaranteeing at least one section machinery pulping is greater than or equal to 145 ℃, and lignin is softened also machinery pulping.
2. preparation method according to claim 1 is characterized in that, the temperature during said machinery pulping is 150～180 ℃.
3. preparation method according to claim 1 and 2 is characterized in that, in said step (1), one or both in the stalk raw materials after accent is dense in adding chemical treatments or the enzyme finishing agent carry out chemistry or biological treatment to it.
4. preparation method according to claim 3 is characterized in that, chemical treatment ℃ is carried out in heating-up temperature to 80～180, ℃ carries out a biological disposal upon in heating-up temperature to 30～100, and the processing time is 5min～3h.
5. according to claim 1 or 2 or 4 described preparation methods, it is characterized in that, in said step (2), add vapours and exchange the adjusting that heats up of stalk raw materials after dense.
6. preparation method according to claim 3 is characterized in that, in said step (2), adds vapours and exchanges the adjusting that heats up of stalk raw materials after dense.
7. according to claim 1 or 2 or 4 or 6 described preparation methods; It is characterized in that; With transferring the stalk raw materials after dense to join in the mechanical disassembler; And input temp is 100～130 ℃ a steam in said mechanical disassembler, in said disassembler, under the rotation exothermic effects of mill, steam further is warming up to greater than 145 ℃.
8. preparation method according to claim 3; It is characterized in that; With transferring the stalk raw materials after dense to join in the mechanical disassembler; And input temp is 100～130 ℃ a steam in said mechanical disassembler, in said disassembler, under the rotation exothermic effects of mill, steam further is warming up to greater than 145 ℃.
9. preparation method according to claim 5; It is characterized in that; With transferring the stalk raw materials after dense to join in the mechanical disassembler; And input temp is 100～130 ℃ a steam in said mechanical disassembler, in said disassembler, under the rotation exothermic effects of mill, steam further is warming up to greater than 145 ℃.
10. according to claim 1 or 2 or 4 or 6 or 8 described preparation methods, it is characterized in that said slurry is used to prepare crepe paper.
11. preparation method according to claim 3 is characterized in that, said slurry is used to prepare crepe paper.
12. preparation method according to claim 5 is characterized in that, said slurry is used to prepare crepe paper.
13. preparation method according to claim 7 is characterized in that, said slurry is used to prepare crepe paper.
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|---|---|---|---|---|
| CN1156772A (en) * | 1996-11-25 | 1997-08-13 | 董金狮 | Technique for manufacturing straw pulp and its product by machining |
| CN1310258A (en) * | 2001-03-16 | 2001-08-29 | 山东大学 | Biological pretreatment process of preparing chemical mechanical straw pulp |
| CN1920167A (en) * | 2005-08-24 | 2007-02-28 | 边静 | Pulping method of non-wood-fiber enzymatic slurry |
| CN101718049A (en) * | 2009-10-30 | 2010-06-02 | 邹平县海华纸业有限公司 | Clean pulping process for straws by mechanical method |
| CN201516353U (en) * | 2009-10-30 | 2010-06-30 | 邹平县海华纸业有限公司 | Composite millstone device |
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2010
- 2010-11-15 CN CN 201010543703 patent/CN102051833B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1156772A (en) * | 1996-11-25 | 1997-08-13 | 董金狮 | Technique for manufacturing straw pulp and its product by machining |
| CN1310258A (en) * | 2001-03-16 | 2001-08-29 | 山东大学 | Biological pretreatment process of preparing chemical mechanical straw pulp |
| CN1920167A (en) * | 2005-08-24 | 2007-02-28 | 边静 | Pulping method of non-wood-fiber enzymatic slurry |
| CN101718049A (en) * | 2009-10-30 | 2010-06-02 | 邹平县海华纸业有限公司 | Clean pulping process for straws by mechanical method |
| CN201516353U (en) * | 2009-10-30 | 2010-06-30 | 邹平县海华纸业有限公司 | Composite millstone device |
Non-Patent Citations (1)
| Title |
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| 吴养育等.利用农作物秸秆原料生产包装用纸板.<<中国造纸学报2005年增刊>>.2005,335-339. * |
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| CN102051833A (en) | 2011-05-11 |
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