CN106320064B - The production method of paper grade (stock) filler - Google Patents
The production method of paper grade (stock) filler Download PDFInfo
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- CN106320064B CN106320064B CN201610768042.9A CN201610768042A CN106320064B CN 106320064 B CN106320064 B CN 106320064B CN 201610768042 A CN201610768042 A CN 201610768042A CN 106320064 B CN106320064 B CN 106320064B
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- China
- Prior art keywords
- molecular weight
- paste
- cationic polyacrylamide
- calcium carbonate
- filler
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Classifications
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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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/675—Oxides, hydroxides or carbonates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
Abstract
The present invention relates to a kind of production methods of paper grade (stock) filler, include the following steps：（1）It is continuously added water into the first molecular weight cationic polyacrylamide, and heats and is stirred continuously mixing, until forming the first paste being made of the first molecular weight cationic polyacrylamide of water absorption and swelling；（2）The second molecular weight cationic polyacrylamide and water are continuously added into calcium carbonate paste, and it is heated, make the second molecular weight cationic polyacrylamide water absorption and swelling, it is stirred continuously mixing during heating, the second paste until forming uniformly mixed calcium carbonate and the second molecular weight cationic polyacrylamide；（3）It is mixed by the first paste and with the second paste, mixture is transferred to spray-drying installation, is the filler, the cationic polyacrylamide of two kinds of different molecular weights by powder made from spray drying, the package of approximate double-layer structure is formed, the turnover rate of calcium carbonate will substantially reduce.
Description
Technical field
The present invention relates to a kind of filler production method of papermaking more particularly to a kind of production methods of paper grade (stock) filler.
Background technology
Raw material of papermaking fiber critical shortage both at home and abroad at present, filler with its abundant raw material resources, cheap price and
Excellent optical property partial alternative fiber becomes the component part of paper stock.It is filled with and slurry water filtering performance and paper page drying position can be improved
Rate can improve paper machine speed, save energy consumption for drying, reduces papermaking cost to a certain extent.In addition, being filled with can also improve into
Opacity, whiteness and the printability of paper.
Traditional filler and being filled with mode can be such that the bond strength in slurry between fiber declines, the strength character of filled paper
Often it can decrease.It being filled with and also will produce negative effect to Process of Applying Glue, sizing agent is easy to be adsorbed on the surface of filler grain,
Under conditions of paper performance meets and is actually needed, the demand of sizing material is made to increase.In addition, be filled with can wet end generate friction and
The service life for shortening wire-cloth to a certain extent, is also easy to phenomena such as hair and powder dropping occur at paper, paper machine operation performance
It can become negatively affected.Therefore the tradition based on unmodified filler is filled with technology, and there is certain limitation, the amount of being filled with to be difficult to
To raising.Under the premise of the raising amount of being filled with, mitigation is filled with negative effect and has a very important significance.
In white-top kraft liner board production process, calcium carbonate is added into approach system in system as main filler,
But substantially reduced in the higher fiber retention of the amount of being filled with and at the strength character of paper, therefore this project is asked for this
Topic is researched and developed.Cationic polyacrylamide（CPAM it is) chain macromolecule compound, since it has a variety of active groups,
Can it is affine with many substances, absorption form hydrogen bond.Mainly flocculate negatively charged colloid, has turbidity removal, decoloration, absorption, glues
The functions such as conjunction.
It is then added to paper machine approach system after carrying out the poly- processing of pre- wadding to calcium carbonate using cationic polyacrylamide, because
Calcium carbonate is negative, and can be wrapped up under certain condition by cationic polyacrylamide, and paper pulp fiber is negative, can with by sun from
Calcium carbonate that sub- polyacrylamide tightly wraps up combines, can increase under the premise of ensureing that fiber loss amount is small fiber and filler it
Between bond strength, to improve paper strength.Simultaneously as the increase of amount of filler, paper-making fibre dosage reduces, to a certain degree
On can improve into paper optical property, reduce production cost.
White-top kraft liner board filler in the prior art using cationic polyacrylamide package calcium carbonate mode exist with
Lower problem：Cationic polyacrylamide leads to carbonic acid calcium current since strand is excessive and the combination of calcium carbonate package effect is bad
It loses, while filler gathers since cationic polyacrylamide is easy wadding, is not easy standing and preserves, therefore is in the configuration good rear short time
Using finishing, such case limits use condition, and one kind is needed to be easy to preserve, convenient for the filler of configuration.
Invention content
The present invention overcomes the deficiencies in the prior art, provide a kind of white-top kraft liner board packaging type being easy to preservation convenient for configuration
Filler and its manufacture craft.
In order to achieve the above objectives, the technical solution adopted by the present invention is：A kind of production method of paper grade (stock) filler, feature
It is, includes the following steps：
（1）It is continuously added water into the first molecular weight cationic polyacrylamide, and heats and is stirred continuously mixing, until shape
At the first paste being made of the first molecular weight cationic polyacrylamide of water absorption and swelling；
（2）It is continuously added the second molecular weight cationic polyacrylamide and water into calcium carbonate paste, and is heated,
Make the second molecular weight cationic polyacrylamide water absorption and swelling, is stirred continuously mixing during heating, it is equal until forming mixing
Second paste of even calcium carbonate and the second molecular weight cationic polyacrylamide；
（3）It is mixed by the first paste and with the second paste, mixture is transferred to spray-drying installation, passes through spraying
Dry powder obtained is the filler；
Wherein the first molecular weight is more than or equal to the second molecular weight.
In a preferred embodiment of the present invention, step（2）In heating stirring make to carry out in autoclave pressure, wherein pressure
At least more than 2 times standard atmospheric pressures of air pressure in kettle, and pressurize degradation a period of time.
In a preferred embodiment of the present invention, 2-5 times of standard atmospheric pressure of air pressure in autoclave pressure.
In a preferred embodiment of the present invention, pressurize degradation time is at least 30 minutes.
In a preferred embodiment of the present invention, first molecular weight and second molecular weight are average molecular weight,
First molecular weight is 100-250 ten thousand, and second molecular weight is 50-150 ten thousand.
In a preferred embodiment of the present invention, the spray-drying installation drives mixture by spraying using high pressure draught
Mouth sprays into mixture in the form of droplets particles in the chamber of cyclone separator, passes through dry air in cyclone separator.
In a preferred embodiment of the present invention, step（2）Middle calcium carbonate paste be by by dissolution of calcium carbonate in water
Fully impregnate and stir the paste of formation.
The invention solves the defect existing in the background technology, and the present invention has following advantageous effect：
（1）By in step（1）And step（2）Preparation respectively, formed two kinds of different molecular weights cation polypropylene
Amide, the molecular weight of the second molecular weight cationic polyacrylamide it is small can directly wrap up calcium carbonate, the first molecular weight substantially
The molecular weight of cationic polyacrylamide is big, is wrapped in the second molecular weight cationic polyacrylamide periphery, is just formed so close
Like the package of double-layer structure, the turnover rate of calcium carbonate will substantially reduce.
（2）Swelling the second molecular weight cationic polyacrylamide of degradation is carried out using high pressure mode, may be implemented second point
Son amount cationic polyacrylamide strand is swollen compared to normal pressure, and segment is broken more abundant, effectively reduces the second molecule
The molecular weight for measuring cationic polyacrylamide, cationic polyacrylamide can more fully wrap up carbonic acid after ensure that degradation
Calcium further increases the binding ability of calcium carbonate and fiber, reduces the turnover rate of calcium carbonate.Only the first molecular weight cationic
Polyacrylamide is difficult to be formed surrounds structure to calcium carbonate.
（3）Gelatin has the amphotericity of protein, can improve the strand contact between polyacrylamide and fiber,
Ensure the retention of cationic polyacrylamide and calcium carbonate.
（4）Pass through step（1）And step（2）In be all made of the configuration hybrid mode of paste, reduce to the greatest extent
Water content can greatly reduce in spray-drying process, dry to need to evaporate energy consumption used in water, play energy-saving and emission-reduction work
With.
（5）Using the mode of spray drying, preserved in the form of dried powder convenient for filler, the holding time is prolonged significantly
When growing, while configuring filler, it is only necessary to filler powder is dispersed in paper pulp, it is easy to use.
Specific implementation mode
The present invention is described in further detail for presently implemented example.
A kind of production method of paper grade (stock) filler, includes the following steps：（1）To the first molecular weight cationic polyacrylamide
In be continuously added water, and heat and be stirred continuously mixing, until formation is by the first molecular weight cationic polyacrylamide of water absorption and swelling
First paste of amine composition；
（2）It is continuously added the second molecular weight cationic polyacrylamide and water into calcium carbonate paste, and is heated,
Make the second molecular weight cationic polyacrylamide water absorption and swelling, is stirred continuously mixing during heating, it is equal until forming mixing
Second paste of even calcium carbonate and the second molecular weight cationic polyacrylamide；
（3）It is mixed by the first paste and with the second paste, mixture is transferred to spray-drying installation, passes through spraying
Dry powder obtained is the filler；
Wherein the first molecular weight is more than or equal to the second molecular weight.
By in step（1）And step（2）Preparation respectively, formed two kinds of different molecular weights cation polypropylene acyl
Amine, the molecular weight of the second molecular weight cationic polyacrylamide it is small can directly wrap up calcium carbonate, the first molecular weight sun substantially
The molecular weight of cationic polyacrylamide is big, is wrapped in the second molecular weight cationic polyacrylamide periphery, is just formed so approximate
The turnover rate of the package of double-layer structure, calcium carbonate will substantially reduce.
Step（2）In heating stirring make to carry out in autoclave pressure, the air pressure wherein in autoclave pressure is more than 2-5 times of standard
Atmospheric pressure, and pressurize degradation a period of time.Swelling the second molecular weight cationic polyacrylamide of degradation is carried out using high pressure mode,
The second molecular weight cationic polyacrylamide strand may be implemented to be swollen compared to normal pressure, segment is broken more abundant, is had
Effect reduces the molecular weight of the second molecular weight cationic polyacrylamide, and cationic polyacrylamide can be more after ensure that degradation
Adequately package calcium carbonate, further increases the binding ability of calcium carbonate and fiber, reduces the turnover rate of calcium carbonate.Only
One molecular weight cationic polyacrylamide is difficult to be formed surrounds structure to calcium carbonate.
Step（2）In a certain amount of gelatin can be added, gelatin has the amphotericity of protein, can improve cation
Strand contact between polyacrylamide and fiber, ensures the retention of cationic polyacrylamide and calcium carbonate.
Pressurize degradation time is at least 30 minutes.
First molecular weight and second molecular weight are average molecular weight, and first molecular weight is 100-250
Ten thousand, second molecular weight is 50-150 ten thousand.
The spray-drying installation drives mixture to pass through spray nozzle using high pressure draught, by mixture with droplets particles
Form sprays into the chamber of cyclone separator, passes through dry air in cyclone separator.Pass through step（1）And step（2）In
It is all made of the configuration hybrid mode of paste, reduces water content to the greatest extent, can be greatly reduced in spray-drying process,
It is dry to need to evaporate energy consumption used in water, it plays a role in energy conservation.Using the mode of spray drying, convenient for filler with drying
The form of powder preserves, and the holding time is greatly prolonged, while when configuring filler, it is only necessary to which filler powder is dispersed in paper pulp
In, it is easy to use.
Step（2）Middle calcium carbonate paste is the paste by the way that dissolution of calcium carbonate fully to be impregnated to and stirred formation in water
Object.
Based on the above description of the preferred embodiments of the present invention, through the above description, related personnel completely can be with
Without departing from the scope of the technological thought of the present invention', various changes and amendments are carried out.The technical scope of this invention
It is not limited to the contents of the specification, it is necessary to determine the technical scope according to the scope of the claims.
Claims (6)
1. a kind of production method of paper grade (stock) filler, which is characterized in that include the following steps：
（1）Be continuously added water into the first molecular weight cationic polyacrylamide, and heat and be stirred continuously mixing, until formation by
First paste of the first molecular weight cationic polyacrylamide composition of water absorption and swelling；
（2）Calcium carbonate is fully impregnated in water and is stirred to form paste, second point is continuously added into calcium carbonate paste
Son amount cationic polyacrylamide and water, and heated, make the second molecular weight cationic polyacrylamide water absorption and swelling, is adding
Mixing is stirred continuously in thermal process, the until forming uniformly mixed calcium carbonate and the second molecular weight cationic polyacrylamide
Two paste；
（3）It is mixed by the first paste and with the second paste, mixture is transferred to spray-drying installation, passes through spray drying
Powder obtained is the filler；
Wherein the first molecular weight is more than or equal to the second molecular weight；Step（2）In heating stirring carry out in autoclave pressure,
At least more than 2 times standard atmospheric pressures of air pressure wherein in autoclave pressure, and pressurize degradation a period of time.
2. the production method of paper grade (stock) filler according to claim 1, it is characterised in that：Air pressure is 2-5 times in autoclave pressure
Standard atmospheric pressure.
3. the production method of paper grade (stock) filler according to claim 1, it is characterised in that：Pressurize degradation time is at least 30
Minute.
4. the production method of paper grade (stock) filler according to claim 1, it is characterised in that：First molecular weight and described
Second molecular weight is average molecular weight, and first molecular weight is 100-250 ten thousand, and second molecular weight is 50-150 ten thousand.
5. the production method of paper grade (stock) filler according to claim 1, it is characterised in that：The spray-drying installation uses
High pressure draught drives mixture to pass through spray nozzle, and mixture is sprayed into the form of droplets particles in the chamber of cyclone separator,
Pass through dry air in cyclone separator.
6. the production method of paper grade (stock) filler according to claim 1, it is characterised in that：Step（2）Middle calcium carbonate paste
Object is the paste by the way that dissolution of calcium carbonate fully to be impregnated to and stirred formation in water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610768042.9A CN106320064B (en) | 2016-08-31 | 2016-08-31 | The production method of paper grade (stock) filler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610768042.9A CN106320064B (en) | 2016-08-31 | 2016-08-31 | The production method of paper grade (stock) filler |
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| Publication Number | Publication Date |
|---|---|
| CN106320064A CN106320064A (en) | 2017-01-11 |
| CN106320064B true CN106320064B (en) | 2018-09-25 |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570947B (en) * | 2009-05-25 | 2010-08-25 | 金东纸业（江苏）股份有限公司 | Method for applying starch modified stuffing in paper making |
| CN102363932B (en) * | 2011-09-30 | 2013-06-05 | 杭州纸友科技有限公司 | On-line surface modification method of papermaking filling material |
| CN103343480B (en) * | 2013-07-02 | 2016-06-01 | 金东纸业（江苏）股份有限公司 | Modified filler and its preparation method, apply its paper technology and paper |
| CN103790068B (en) * | 2014-02-18 | 2016-04-06 | 福建农林大学 | Starch spraying dry prepares the method for capsule-type papermaking filler |
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