CN104213462B - Application method of white clay in papermaking filling - Google Patents
Application method of white clay in papermaking filling Download PDFInfo
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- CN104213462B CN104213462B CN201410437906.XA CN201410437906A CN104213462B CN 104213462 B CN104213462 B CN 104213462B CN 201410437906 A CN201410437906 A CN 201410437906A CN 104213462 B CN104213462 B CN 104213462B
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Abstract
The invention discloses an application method of white clay in papermaking filling. The method comprises the following steps: (1) dispersing the white clay in water to form a suspension with the mass percent of 1%; (2) sequentially adding cationic polyacrylamide, cationic starch and AKD into the white clay suspension and stirring for 10 to 15 minutes under the revolving speed of 500rpm to 1000rpm so as to obtain a white clay flocculant polymer suspension; and (3) pouring the white clay flocculant polymer suspension obtained in the step (2) into a defibered pulp, evenly stirring and then manually dehydrating the pulp on a rapid sheet former. The method is simple, convenient and effective, low in cost and strong in operability, and ensures that the sizing efficiency of the AKD in the paper added with the white clay is obviously improved while the strength of the paper and the retention rate of the white clay are improved, thereby greatly improving the application performance of the white clay taken as a papermaking filler.
Description
Technical field
The present invention relates to pulp and paper technology field, be specifically related to a kind of white clay application process in papermaking is filled with.
Background technology
White clay is a kind of by-product in the black liquor of pulp making alkali recovery process of paper mill, and it is mainly composed of calcium carbonate.According to
The difference of pulping raw material, white clay can be divided into wood pulp white clay and the big class of non-wood pulp white clay two.Wood pulp white clay is relative due to impurity content
Relatively low, can recycle by the way of Calx is reclaimed in calcining.Rather than wood pulp white clay cannot repeat owing to silicone content is higher
Utilize.China is a non-wood pulping big country, thus has a large amount of non-wood pulp white clay to produce every year.In order to avoid the wasting of resources and
Environmental pollution, after some domestic paper mills are refined into calcium carbonate white clay, is filled with for paper.
From the point of view of white clay is relative to pulp fiber, low price is a lot, thus white clay is used for paper and is filled with and can reduce production
Cost.The whiteness of paper, opacity, smoothness etc. can also be promoted simultaneously, reduce the energy consumption in paper dry run.But
Being filled with in application process discovery actual, white clay is filled with the sizing efficiency that can seriously reduce AKD.Additionally increase white clay consumption also can
Cause paper strength to reduce, be primarily due to the combination that white clay hinders between fiber and fiber.The retention of white clay is also simultaneously
There is the space of lifting further.
In recent years, domestic and international papermaker has carried out research work for the problems referred to above.Including cell lumen loading, fill out
Although material/fiber fines is compounded in some interior technology and can improve the paper strength of filled paper to a certain extent and filler is kept
Rate, but cannot reduce and be filled with the adverse effect brought to applying glue.There are some researches show, modified with starch-sodium stearate complex
White clay, can improve to a certain extent AKD sizing efficiency (Hu Jianrong, Zhao Lihong, what North Sea. modified white clay prepared calcium carbonate
Calcium is filled with and sizing property research [J]. Paper Science & Technology, and 2012,31 (2): 46-51), but this method effect has
Limit.And said method all exists a same problem, it is simply that owing to complex operation or production cost are higher, it is difficult to
Industrially realize application.
Therefore, develop a kind of method simple and easy to operate and with low cost, improve the applying glue effect of AKD in white clay filled paper
Rate, improves intensity and the white clay retention of paper simultaneously, is papermaker's difficult problem urgently to be resolved hurrily.
Summary of the invention
It is an object of the invention to provide a kind of white clay application process in papermaking is filled with.The method technique is simple, cost
Cheap, workable, the sizing efficiency that can significantly improve AKD in white clay filled paper can also improve the intensity of paper simultaneously
With white clay retention, there is application prospect widely.
The purpose of the present invention is achieved by the following technical programs:
A kind of white clay application process in papermaking is filled with, is realized by following steps:
(1) it is the suspension of 1% that white clay is dispersed in water formation mass fraction；
(2) in above-mentioned white clay suspension, it is sequentially added into PAMC, cationic starch and AKD；And
Stir 10～15min under the speed conditions of 500～1000rpm, obtain white clay wadding aggressiveness suspension；
(3) white clay obtained in step (2) wadding aggressiveness suspension is poured in the Plant fiber's suspension discongested, stir
Mix after uniformly handsheet on quick sheet former.
White clay described in step (1) is non-wood pulping black liquor alkali recovery white slime.
Described in step (2), the consumption of PAMC is 0.04～0.08%；The consumption of cationic starch is
0.6～1.0%；AKD consumption is 0.2～0.3%.Described consumption is based on the absolute dry mass of plant fiber material.
Described in step (2), the consumption of white clay is 15～40%, absolute dry mass based on plant fiber material.
The consumption of described white clay is 30～40%.
Described in step (2), cationic starch is the cationic starch through gelatinizing.
Described in step (2), the condition of gelatinizing is: starch quality concentration 1%, gelatinization point 90～95 DEG C, gelatinization time
30min。
Compared with prior art, the present invention has the advantage that and beneficial effect:
Different from the addition manner of wet-end chemicals in tradition copy paper technique, the present invention be by white clay filler with used other
It is poly-that auxiliary agent mixes wadding in advance, then adds copy paper in paper pulp.White clay after wadding is poly-increases due to particle diameter, and specific surface area reduces,
Zeta current potential raises, and the absorption to AKD significantly reduces, thus the AKD being retained on fiber increases, and sizing efficiency significantly improves,
And white clay retention also increases.When white clay after wadding is poly-simultaneously is filled with, the obstruction to fiber in paper with fiber combining subtracts
Little, thus the intensity of paper have also been obtained improvement.
Present invention process is simple, it is not necessary to heating cooling or dry, workable, production cost is low, and can realize
Line produces and simplification of flowsheet continuously.Compared with traditional handicraft, the present invention need not add any extra auxiliary agent and just can show
Write ground and improve the sizing efficiency of AKD, the intensity of paper and the retention of white clay can also be improved simultaneously, substantially increase white clay conduct
The serviceability of papermaking filler.
Detailed description of the invention
Below in conjunction with example, the enforcement of the present invention is described further, but the enforcement of the present invention and protection are not limited to this.
Comparative examples 1
(1) by 2g (over dry) plant fiber material (reducing rules: change reed pulp: bleached sulphate softwood pulp mass ratio=4:
3:3) add in 1500ml water, discongest 5000 turns with fluffer.
(2) in the slurry that step (1) obtains, 31.5% (absolute dry mass based on plant fiber material) is added successively white
Mud, 0.75% (absolute dry mass based on plant fiber material) cationic starch, 0.25% (over dry based on plant fiber material
Quality) AKD, 0.04% (absolute dry mass based on plant fiber material) PAMC, quickly after stirring
Handsheet on handshcet former.
(3) by the handsheet that obtains in (2) equilibrium water conten under conditions of (23 ± 1) DEG C and (50 ± 2) % relative humidity
After 24h, according to GB/T 1540-2002, GB/T 12914-2008, GB/T 454-2002, GB/T 455-2002 and GB/T
22877-2008 measures paper Cobb value, tensile strength, pop strength, tearing strength and white clay retention.For measuring Cobb
First ripening 15min under conditions of 105 DEG C before the handsheet equilibrium water conten of value.
Embodiment 1
(1) by 2g (over dry) plant fiber material (reducing rules: change reed pulp: bleached sulphate softwood pulp mass ratio=4:
3:3) add in 1500ml water, discongest 5000 turns with fluffer.
(2) 31.5% (absolute dry mass based on plant fiber material) white clay is dispersed in water formation mass fraction is
The suspension of 1%.Then 0.04% (absolute dry mass based on plant fiber material) PAMC it is sequentially added into,
0.75% (absolute dry mass based on plant fiber material) cationic starch, 0.25% (over dry matter based on plant fiber material
Amount) AKD.Stir 10min with magnetic stirring apparatus with the rotating speed of 600rpm, obtain white clay wadding aggressiveness suspension.
(3) pouring in the slurry obtained in step (1) by the white clay obtained in step (2) wadding aggressiveness suspension, stirring is all
By quick handshcet former handsheet after even.
(4) handsheet obtained in step (3) equilibrium water under conditions of (23 ± 1) DEG C and (50 ± 2) % relative humidity
After dividing 24h, according to GB/T 1540-2002, GB/T 12914-2008, GB/T 454-2002, GB/T 455-2002 and GB/T
22877-2008 measures paper Cobb value, tensile strength, pop strength, tearing strength and white clay retention.For measuring Cobb
First ripening 15min under conditions of 105 DEG C before the handsheet equilibrium water conten of value.Measurement result such as following table:
Table 1
The technique that comparative examples 1 simulates tradition handsheet.Compared with comparative examples 1, obtain in embodiment 1 is white
Mud filled paper Cobb value under the identical amount of being filled with have dropped 70.3%, i.e. AKD sizing efficiency improves 70.3%.Anti-tensile simultaneously
Index improves 36.9%, and burst index improves 25.3%, and tear index improves 4.87%, and white clay retention improves
3.85%.
Comparative examples 2
(1) by 2g (over dry) plant fiber material (reducing rules: change reed pulp: bleached sulphate softwood pulp mass ratio=4:
3:3) add in 1500ml water, discongest 5000 turns with fluffer.
(2) successively in the slurry that step (1) obtains add 39% (absolute dry mass based on plant fiber material) white clay,
0.75% (absolute dry mass based on plant fiber material) cationic starch, 0.25% (over dry matter based on plant fiber material
Amount) AKD, 0.04% (absolute dry mass based on plant fiber material) PAMC, quickly copying after stirring
Handsheet on sheet device.
(3) by the handsheet that obtains in (2) equilibrium water conten under conditions of (23 ± 1) DEG C and (50 ± 2) % relative humidity
After 24h, according to GB/T 1540-2002, GB/T 12914-2008, GB/T 454-2002, GB/T 455-2002 and GB/T
22877-2008 measures paper Cobb value, tensile strength, pop strength, tearing strength and white clay retention.For measuring Cobb
First ripening 15min under conditions of 105 DEG C before the handsheet equilibrium water conten of value.
Embodiment 2
(1) by 2g (over dry) plant fiber material (reducing rules: change reed pulp: bleached sulphate softwood pulp mass ratio=4:
3:3) add in 1500ml water, discongest 5000 turns with fluffer.
(2) it is 1% that 39% (absolute dry mass based on plant fiber material) white clay is dispersed in water formation mass fraction
Suspension.Then 0.04% (absolute dry mass based on plant fiber material) PAMC it is sequentially added into,
0.75% (absolute dry mass based on plant fiber material) cationic starch, 0.25% (over dry matter based on plant fiber material
Amount) AKD.Stir 10min with magnetic stirring apparatus with the rotating speed of 600rpm, obtain white clay wadding aggressiveness suspension.
(3) pouring in the slurry obtained in step (1) by the white clay obtained in step (2) wadding aggressiveness suspension, stirring is all
By quick handshcet former handsheet after even.
(4) handsheet obtained in step (3) is balanced under conditions of (50 ± 2) % relative humidity in (23 ± 1) DEG C
After moisture 24h, according to GB/T 1540-2002, GB/T 12914-2008, GB/T 454-2002, GB/T 455-2002 and GB/
T 22877-2008 measures paper Cobb value, tensile strength, pop strength, tearing strength and white clay retention.For measuring
First ripening 15min under conditions of 105 DEG C before the handsheet equilibrium water conten of Cobb value.Measurement result such as following table:
Table 2
The technique that comparative examples 2 simulates tradition handsheet.Compared with comparative examples 2, obtain in embodiment 2 is white
Mud filled paper Cobb value under the identical amount of being filled with have dropped 70%, i.e. AKD sizing efficiency improves 70%.Tensile index simultaneously
Improve 33.3%, burst index improves 18.7%, and tear index improves 2.06%, and white clay retention improves
1.45%.
Embodiment 3
(1) by 2g (over dry) plant fiber material (reducing rules: change reed pulp: bleached sulphate softwood pulp mass ratio=4:
3:3) add in 1500ml water, discongest 5000 turns with fluffer.
(2) it is 1% that 19% (absolute dry mass based on plant fiber material) white clay is dispersed in water formation mass fraction
Suspension.Then 0.04% (absolute dry mass based on plant fiber material) PAMC it is sequentially added into,
0.75% (absolute dry mass based on plant fiber material) cationic starch, 0.25% (over dry matter based on plant fiber material
Amount) AKD.Stir 10min with magnetic stirring apparatus with the rotating speed of 600rpm, obtain white clay wadding aggressiveness suspension.
(3) pouring in the slurry obtained in step (1) by the white clay obtained in step (2) wadding aggressiveness suspension, stirring is all
By quick handshcet former handsheet after even.
(4) handsheet obtained in step (3) is balanced under conditions of (50 ± 2) % relative humidity in (23 ± 1) DEG C
After moisture 24h, according to GB/T 1540-2002, GB/T 12914-2008, GB/T 454-2002, GB/T 455-2002 and GB/
T 22877-2008 measures paper Cobb value, tensile strength, pop strength, tearing strength and white clay retention.For measuring
First ripening 15min under conditions of 105 DEG C before the handsheet equilibrium water conten of Cobb value.Measurement result such as following table:
Table 3
Embodiment 4
(1) by 2g (over dry) plant fiber material (reducing rules: change reed pulp: bleached sulphate softwood pulp mass ratio=4:
3:3) add in 1500ml water, discongest 5000 turns with fluffer.
(2) it is 1% that 25% (absolute dry mass based on plant fiber material) white clay is dispersed in water formation mass fraction
Suspension.Then 0.04% (absolute dry mass based on plant fiber material) PAMC it is sequentially added into,
0.75% (absolute dry mass based on plant fiber material) cationic starch, 0.25% (over dry matter based on plant fiber material
Amount) AKD.Stir 10min with magnetic stirring apparatus with the rotating speed of 600rpm, obtain white clay wadding aggressiveness suspension.
(3) pouring in the slurry obtained in step (1) by the white clay obtained in step (2) wadding aggressiveness suspension, stirring is all
By quick handshcet former handsheet after even.
(4) handsheet obtained in step (3) is balanced under conditions of (50 ± 2) % relative humidity in (23 ± 1) DEG C
After moisture 24h, according to GB/T 1540-2002, GB/T 12914-2008, GB/T 454-2002, GB/T 455-2002 and GB/
T 22877-2008 measures paper Cobb value, tensile strength, pop strength, tearing strength and white clay retention.For measuring
First ripening 15min under conditions of 105 DEG C before the handsheet equilibrium water conten of Cobb value.Measurement result such as following table:
Table 4
Claims (6)
1. the white clay application process in papermaking is filled with, it is characterised in that comprise the steps:
(1) it is the suspension of 1% that white clay is dispersed in water formation mass fraction；
(2) in above-mentioned white clay suspension, it is sequentially added into PAMC, cationic starch and AKD；And 500～
Stir 10～15min under the speed conditions of 1000rpm, obtain white clay wadding aggressiveness suspension；
(3) white clay obtained in step (2) wadding aggressiveness suspension is poured in the slurry discongested, quickly after stirring
Handsheet on sheet former；The consumption of described white clay is 15～40%, absolute dry mass based on plant fiber material.
Method the most according to claim 1, it is characterised in that described white clay is non-wood pulping black liquor alkali recovery white slime.
Method the most according to claim 1 and 2, it is characterised in that the consumption of described PAMC is 0.04
～0.08%, the consumption of cationic starch is 0.6～1.0%, and AKD consumption is 0.2～0.3%, and above-mentioned consumption is based on plant
The absolute dry mass of fibrous raw material.
Method the most according to claim 3, it is characterised in that the consumption of described white clay is 30～40%.
Method the most according to claim 4, it is characterised in that described cationic starch is the cationic starch through gelatinizing.
Method the most according to claim 5, it is characterised in that the condition of described gelatinizing is: starch quality concentration 1%, sticks with paste
Change temperature 90～95 DEG C, gelatinization time 30min.
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| CN201410437906.XA CN104213462B (en) | 2014-08-29 | 2014-08-29 | Application method of white clay in papermaking filling |
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| CN1546789A (en) * | 2003-12-12 | 2004-11-17 | 山东博汇纸业股份有限公司 | Improved lime mud recovering process and its application for producing neutral glue blending paper |
| CN102677543A (en) * | 2012-06-11 | 2012-09-19 | 岳阳林纸股份有限公司 | Method for fill feeding in papermaking |
| CN103343479A (en) * | 2013-06-27 | 2013-10-09 | 华南理工大学 | Method for improving AKD (Alkyl Ketene Dimer) sizing efficiency for white mud filled paper material |
| CN103397561A (en) * | 2013-07-30 | 2013-11-20 | 中国制浆造纸研究院 | Method for increasing ash content of paper |
| CN103882765A (en) * | 2012-12-24 | 2014-06-25 | 造纸工业生产力促进中心 | Method for improving sizing performance of white mud calcium carbonate filled paper |
-
2014
- 2014-08-29 CN CN201410437906.XA patent/CN104213462B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546789A (en) * | 2003-12-12 | 2004-11-17 | 山东博汇纸业股份有限公司 | Improved lime mud recovering process and its application for producing neutral glue blending paper |
| CN102677543A (en) * | 2012-06-11 | 2012-09-19 | 岳阳林纸股份有限公司 | Method for fill feeding in papermaking |
| CN103882765A (en) * | 2012-12-24 | 2014-06-25 | 造纸工业生产力促进中心 | Method for improving sizing performance of white mud calcium carbonate filled paper |
| CN103343479A (en) * | 2013-06-27 | 2013-10-09 | 华南理工大学 | Method for improving AKD (Alkyl Ketene Dimer) sizing efficiency for white mud filled paper material |
| CN103397561A (en) * | 2013-07-30 | 2013-11-20 | 中国制浆造纸研究院 | Method for increasing ash content of paper |
Non-Patent Citations (1)
| Title |
|---|
| 造纸助剂的预混合工艺对纸张性能的影响;何柳等;《造纸科学与技术》;20121015;第31卷(第5期);第68-71页 * |
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