CN106894281B - A kind of paper grade (stock) light calcium covered fiber filler and its preparation method and application - Google Patents
A kind of paper grade (stock) light calcium covered fiber filler and its preparation method and application Download PDFInfo
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- CN106894281B CN106894281B CN201510955220.4A CN201510955220A CN106894281B CN 106894281 B CN106894281 B CN 106894281B CN 201510955220 A CN201510955220 A CN 201510955220A CN 106894281 B CN106894281 B CN 106894281B
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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
- D21H17/71—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes
- D21H17/74—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes of organic and inorganic material
-
- 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
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
- D21H17/29—Starch cationic
-
- 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
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/52—Epoxy resins
-
- 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
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
- D21H17/55—Polyamides; Polyaminoamides; Polyester-amides
-
- 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
- D21H17/63—Inorganic compounds
- D21H17/70—Inorganic compounds forming new compounds in situ, e.g. within the pulp or paper, by chemical reaction with other substances added separately
Abstract
The invention discloses a kind of paper grade (stock) light calcium covered fiber fillers, according to parts by weight, including following components: 100 parts of calcium hydroxide, 30-40 parts of pulp, 200-300 parts of carbon dioxide gas, 0.01-0.1 parts of Polyamide Epoxy, 0.04-0.1 parts of polyacrylamide, 0.03-0.05 parts of cationic starch；A kind of preparation method and application of paper grade (stock) light calcium covered fiber filler are also disclosed simultaneously.The calcium carbonate covered fiber filler can be improved filler retention, reduce white water consistency, improve the plain boiled water circulatory system, and the quantitative of paper, ash, tensile strength can be improved into, and retention rate etc. saves fiber consumption, reduces cost.
Description
Technical field
The present invention relates to pulp technology for making paper more particularly to a kind of paper grade (stock) light calcium covered fiber filler and preparation method thereof
With the application in papermaking.
Background technique
With the development of paper technology, it is to make that filler, which has become an essential component in most paper kinds,
One of basic component of paper.The purpose that filler is added in the paper making process mainly reduces cost, so that paper is obtained certain specific
Performance or improve its original performance.
Paper grade (stock) inorganic filler mainly has calcium carbonate, talcum powder, titanium dioxide, calcium carbonate etc., and the addition of filler can replace
Fiber can improve the performance and production cost of paper, save paper pulp, drop low environmental impact, mitigate ecological environment
Load.It is on the one hand because the reduction of proportion of fibers leads to Hydrogenbond point quantity between fiber but with the increase of amount of filler
Reduction；On the other hand be because Hydrogen bonding forces cannot be formed between filler and filler or between filler and fiber, and
Filler is clipped between fiber and fiber, spatially also prevents fiber and interfibrous Hydrogenbond, thus the intensity of paper
It will receive larger impact with cohesive force, while filler retention is often declined.Make the tiny component in mthod of white water from paper making system
Content dramatically increases, and thus increases the difficulty of practical application to a certain extent, and also making to be filled with measurer has certain limitation
(usually 15%~25%).
Therefore, light calcium covered fiber filler is developed, the retention rate of filler is improved, fiber consumption is reduced, is China and foreign countries' papermaking row
Industry all compares this direction of concern at present；The present invention, which just overcomes, is filled with rear white water consistency height, retention using conventional filler
Low, paper strength is increased the disadvantages of impacted larger by the filler amount of being filled with.
Summary of the invention
For solve present in above-mentioned existing paper technology " conventional filler is filled with that rear white water consistency is high, retention is low, at
Paper intensity is increased impacted larger by the filler amount of being filled with " the problem of.
The present invention provides a kind of paper grade (stock) light calcium covered fiber fillers can after calcium carbonate covered fiber filler
It improves filler retention, reduce white water consistency, improve the plain boiled water circulatory system, and it is strong that the quantitative of paper, ash, anti-tensile can be improved into
Degree, retention rate etc. save fiber consumption, reduce cost.
The present invention also provides a kind of preparation methods of paper grade (stock) light calcium covered fiber filler, and this method is easy to operate, at
Product rate is high, saves cost of labor, improves economic benefit.
The present invention also provides a kind of application of paper grade (stock) light calcium covered fiber filler in papermaking, by light to paper grade (stock)
Calcium filler carries out processing to improve retention, improves the quantitative of paper, ash, tensile strength, and retention rate etc. is saved fiber and used
Amount increases product competitiveness in the market to reduce production cost.
To achieve the above object, the invention adopts the following technical scheme:
The first aspect of the invention provides a kind of paper grade (stock) light calcium covered fiber filler, using the original of following parts by weight
Material preparation:
Further, the paper grade (stock) light calcium covered fiber filler is prepared using the raw material of following parts by weight:
Further, the paper grade (stock) light calcium covered fiber filler is prepared using the raw material of following parts by weight:
Further, the calcium hydroxide is configured to the solution that concentration is 15%~25%, and 2 μm of particle contents below are high
In 35%, whiteness is higher than 87.
Further, the pulp is needle slurry: broad-leaved slurry=1:4~1:5, and beating degree is 40 ° of SR~45 ° SR's
Mixed slurry.
Further, the Polyamide Epoxy molecular weight is 3~60,000.
Further, the Molecular Weight for Polyacrylamide is 300-1000 ten thousand.
The second aspect of the invention provides a kind of preparation method of paper grade (stock) light calcium covered fiber filler, specifically include with
Lower step:
Step 1, Polyamide Epoxy solution, polyacrylamide solution and cationic starch solution are added in order
In pulp solution, stir；
Step 2, the mixed component of step 1 after mixing evenly is added in calcium hydroxide solution, passes through carbon dioxide gas
Body (intake is converted into pure carbon dioxide amount)；
Step 3, control reaction temperature is 10-35 DEG C, reaction time 1-3, and after abundant carburizing reagent, pH value reaches 8-9, mistake
Filter, distillation, are made paper grade (stock) light calcium covered fiber filler.
The paper grade (stock) light calcium covered fiber filler of the preparation method preparation, solid content is 20%~30%, viscosity is
15~60cps, pH are that 8~9 and 2 μm or less particle contents are higher than 35%.
Further, the density of carbon dioxide gas is 45%-60%.
Further, the density of carbon dioxide gas is 50%.
Further, reaction temperature is 18 DEG C in the step 3, reaction time 2h.
Further, the calcium hydroxide solution solid content is 15%~25%, and 2 μm or less particle contents are higher than 35%,
Whiteness is higher than 87.Butt additive amount is 100 parts, and other components are added by calcium hydroxide component.
Further, the pulp is needle slurry: broad-leaved slurry=1:4~1:5, and beating degree 400SR~450SR's is mixed
Slurry is closed, the pulp solution that concentration is 0.7%~1.2% is configured to, opposite additive amount of giving money as a gift is 30~40 parts.
Further, the pulp is needle slurry: broad-leaved slurry=1:4.5, the mixing of beating degree 400SR~450SR
Slurry is configured to the mixed slurry solution that concentration is 1.0%.
Further, the Polyamide Epoxy molecular weight is 3~60,000, is configured to the polyamides that concentration is 3%~8%
Amine epoxy resin solution；Preferably, it is configured to the Polyamide Epoxy solution that concentration is 4-6%, pH value is 8~11, is given money as a gift
Opposite additive amount is 0.05-0.10 parts；It is highly preferred that being configured to the Polyamide Epoxy that concentration is 5%, pH value is 8~11
Solution.
Further, the Molecular Weight for Polyacrylamide is 300-1000 ten thousand, and being configured to concentration is the poly- of 0.1%-0.5%
Acrylamide solution, opposite additive amount of giving money as a gift is 0.05-0.1 parts；Preferably, it is configured to the polyacrylamide that concentration is 0.3%
Solution.
Further, the cationic starch is configured to the cationic starch solution that concentration is 0.8%~1.5%, gives money as a gift
Opposite additive amount is 0.03-0.05 parts；Preferably, it is molten to be configured to the cationic starch that concentration is 1.0% for the cationic starch
Liquid.
Further, the density of carbon dioxide gas is 45%-60%.
Further, the density of carbon dioxide gas is 50%
It is above-mentioned, Polyamide Epoxy, mixed slurry, polyacrylamide, cationic starch respectively with water, toluene, diformazan
Benzene, alcohols (ethyl alcohol) and ketone (acetone) equal solvent be configured to the Polyamide Epoxy solution of respective concentration, mixed slurry solution,
Polyacrylamide solution, cationic starch solution are preferably configured to corresponding aqueous solution.
The third aspect of the invention provides a kind of application of light calcium covered fiber filler in papermaking.
The fiberfill of light calcium cladding produced by the present invention, is filled with, plain boiled water reduces by 21~25 percentages as paper making wet part
Point, filler retention improve 4~15 percentage points.Paper basis weight improves 1~5g/m2, and ash improves 6~22 percentage points, resists
Zhang Qiangdu improves 5~11 percentage points, and total retention rate improves 2~5 percentage points；
Light calcium covered fiber filler of the invention can replace fiber, and save the cost can reduce white water consistency, improve white
Water circulation, mitigates ecological environment load.
The method for testing performance of paper grade (stock) light calcium covered fiber filler of the present invention:
(1) dynamic drainage is tested
Load weighted paper pulp is stirred 5 by online concentration 0.6% (paper stock 3g over dry), design speed 750r/min by design
After second, filler is stirred 5 seconds, and retention agent is then added and stirs 5 seconds, machine water 100ml is taken after opening drain valve 10 seconds, is detected white
Water concentration, ash, parallel laboratory test 3 times.
(2) handsheet is tested
Design copy paper slurry 70g/m2, by load weighted paper pulp stir 1 minute after, be added filler stir 2 minutes, finally plus
CPAM is stirred 2 minutes and is removed, the semi-automatic sheet forming apparatus handsheet of LABTECH73-62, through LABTECH 73-50 standard page pressure
Natural air drying after crusher squeezing, the indexs such as detection pattern whiteness, opacity, intensity, ash.
The present invention by adopting the above technical scheme, compared with prior art, has the following technical effect that
Light calcium covered fiber applying filler of the invention is in papermaking, and plain boiled water reduces by 21~25 percentage points, and filler retains
Rate improves 4~15 percentage points, hence it is evident that reduces white water consistency, increases white water recycling rate, saves part rinse dosage；(2) at
Paper quantitatively improves 1~5g/m2, and ash improves 6~22 percentage points, and tensile strength improves 5~11 percentage points, and total retention rate mentions
It is 2~5 percentage points high；(3) increase of filler retention, the raising of paper basis weight, ash content can reduce fiber consumption, save paper
Slurry reduces cost, protects environment；(4) raising of tensile strength improves the quality of paper.
Light calcium covered fiber filler of the invention can replace fiber, and save the cost can reduce white water consistency, improve white
Water circulation, mitigates ecological environment load.Quantitative, ash content, total retention rate etc. can also be improved simultaneously, reduces fiber consumption, reduced
Cost increases product competitiveness in the market.
Specific embodiment
Application the present invention provides a kind of paper grade (stock) light calcium covered fiber filler and preparation method thereof and in papermaking.Make
After calcium carbonate covered fiber filler, it can be improved filler retention, reduce white water consistency, improve the plain boiled water circulatory system, and
The quantitative of paper, ash, tensile strength can be improved into, retention rate etc. saves fiber consumption, reduces cost.
The present invention is described in more detail below by specific embodiment, for a better understanding of the present invention,
But following embodiments are not intended to limit the scope of the invention.
The preparation of 1 paper grade (stock) light calcium covered fiber filler of embodiment
Step 1: be needle slurry by pulp: the mixed slurry of broad-leaved slurry=1:4 paper pulp, beating degree 400SR is prepared
At the dense pulp solution 5kg for being 0.8% of slurry, be added sequentially in reaction kettle, the daiamid epoxy that concentration is 5% be added
Resin solution 1g, the polyacrylamide solution 16.5g that concentration is 0.3%, the cationic starch solution 5g that concentration is 0.8%,
Revolving speed is that 450r/min stirs 20min, is uniformly mixed it.
Step 2: the calcium hydroxide solution for being 20% by 500g solid content is added in the fiber mixed component of step 1, is turned
Speed is 500r/min, pressure 0.3Mpa, and stirring 30min is uniformly mixed it, is down to normal pressure, revolving speed 300r/min.
Step 3: being passed through the gas that gas concentration lwevel is 45%, at 18 DEG C ± 2 DEG C or so, abundant carburizing reagent makes pH
Reach 8.5 or so, by filtering, distillation, obtaining solid content is 25% light calcium covered fiber filler.
The preparation of 2 paper grade (stock) light calcium covered fiber filler of embodiment
Step 1: being needle slurry: broad-leaved slurry=1:4 paper pulp by pulp, the mixed slurry of beating degree 400SR is prepared
At the dense pulp solution 3.75kg for being 0.8% of slurry, be added in reaction kettle, sequentially add the polyamide that concentration is 5%
Epoxy resin solution 1g, the polyacrylamide solution 16.5g that concentration is 0.3%, the cationic starch solution that concentration is 0.8%
5g is that 450r/min stirs 20min in revolving speed, is uniformly mixed it.
Step 2: the calcium hydroxide solution for being 20% by 500g solid content is added in the fiber mixed component of step 1, is turned
Speed is 500r/min, pressure 0.3Mpa, and stirring 30min is uniformly mixed it, is down to normal pressure, revolving speed 300r/min.
Step 3: being passed through the gas that gas concentration lwevel is 45%, at 18 DEG C ± 2 DEG C or so, abundant carburizing reagent makes pH
Reach 8.5 or so, by filtering, distillation, obtaining solid content is 25% light calcium covered fiber filler.
Embodiment 3 dynamically considers water experiment:
3.1 laboratory samples:
Select east rise new material (Shandong) Co., Ltd production paste light calcium filler (trade mark: SSTL-PCC GZ40) and
The fiberfill of light calcium cladding.
3.2 experiment conditions:
Wet end furnish: needle starches 20%+ broad-leaved and starches 80% (mixing slurry beating degree 400SR)
Surabaja cream calcium filler, the fiberfill of light calcium calcium cladding, CPAM retention；
Experimental technique: slurry (75%)+filler (25%)+CPAM (200ppm)；
(the above additive amount is dry/dry)
Design 750 turns of design speed, load weighted paper pulp is stirred 5 seconds by online concentration 0.6% (paper stock 3g over dry)
Afterwards, filler stirs 5 seconds, and retention agent is then added and stirs 5 seconds, machine water 100ml is taken after opening drain valve 10 seconds, detects plain boiled water
Concentration, ash, parallel laboratory test 3 times.
3.3 experimental data
Experimental data (1) experimental technique: slurry (75%)+filler (25%)+CPAM (200ppm)；
Experimental data (2) experimental technique: slurry (75%)+filler (25%)+CPAM (200ppm)；
Experimental data (3)
3.4 conclusions:
1, after the fiberfill that can be seen that addition light calcium cladding by testing (1,2) result, white water consistency is had dropped
21.4%~25.7%, average total retention rate improves 2.5%~3.7%, and plain boiled water filter residue ash reduces 2.6%~4.3%, fibre
It ties up retention rate and improves 1.2%~2.1%, filler retention improves 4.1%~14.6%.
2, it can be seen that by experimental data (3) result after improving partial filler additive amount, white water consistency decline is average
Total retention rate improves, and plain boiled water filter residue ash reduces, and fiber retention improves, and trend is consistent.
Embodiment 4
4.1 laboratory samples:
East is selected to rise the Surabaja cream calcium filler of new material (Shandong) Co., Ltd production and the fiberfill of light calcium cladding.
4.2 needles starch 20%+ broad-leaved and starch 80% (mixing slurry beating degree 400SR)
Technique one: slurry (75%)+filler (25%)+CPAM (200ppm)；
Technique two: slurry (70%)+filler (30%)+CPAM (200ppm)；
(the above additive amount is dry/dry)
The fiberfill of common light calcium filler, light calcium cladding
Design copy paper slurry 70g/m2, by load weighted paper pulp stir 1 minute after, be added filler stir 2 minutes, finally plus
CPAM is stirred 2 minutes and is removed, the semi-automatic sheet forming apparatus handsheet of LABTECH73-62, through LABTECH 73-50 standard page pressure
Natural air drying after crusher squeezing, the indexs such as detection pattern whiteness, opacity, intensity, ash.
4.3 experimental datas:
Experimental data (4) technique one: slurry (75%)+filler (25%)+CPAM (200ppm)；
Experimental data (5) technique one: slurry (75%)+filler (25%)+CPAM (200ppm)；
Experimental data (6)
4.4 conclusions:
1, by test data (4,5) result can be seen that addition light calcium cladding fiberfill after, quantitatively improve 1~
5g/m2, calcination ash improve 6.2%~22.5%, and tensile strength improves 5.7%~10.7%, and total retention rate improves 1.8~
5.1, whiteness, opacity are close.
2, after can be seen that the fiberfill ratio for increasing light calcium cladding by experimental data (6) result, quantitative, ash content
The total retention rate of tensile strength has the raising of different amplitudes, and whiteness, opacity are close.
Experimental analysis:
1, it can be seen that when identical as former additive amount by test result, it is white after the fiberfill of addition light calcium cladding
Water concentration is decreased obviously 21~25 percentage points, and average total retention rate improves 2~4 percentage points, and plain boiled water filter residue ash reduces
22~4 percentage points, fiber retention improves 1~2 percentage point, and filler retention improves 4~15 percentage points.Paper basis weight
1~5g/m2 is improved, ash improves 6~22 percentage points, and tensile strength improves 5~11 percentage points, and total retention rate improves 2~5
Percentage point.
2, constant in other conditions, amount of filler increases (increasing to 30% by 25%), and white water consistency, plain boiled water filter residue ash are equal
Decrease, average total retention rate, fiber retention, filler retention have a raising of different amplitudes, paper basis weight, ash,
Tensile strength, total retention rate increase, and trend is consistent.
3, white water consistency declines, and retention rate improves, and increases white water recycling rate, saves the consumption of rinse dosage, dry steam,
Help to save papermaking cost, mitigates ecological environment load.
The present invention passes through a series of research, experiment, it was demonstrated that the fiberfill of the cladding of the light calcium made from this method is used as
Paper making wet part is filled with, and plain boiled water reduces by 21~25 percentage points, and filler retention improves 4~15 percentage points.Paper basis weight improves 1
~5g/m2, ash improve 6~22 percentage points, and tensile strength improves 5~11 percentage points, and total retention rate improves 2~5 hundred
Branch；After increasing filler additive amount, white water consistency, plain boiled water filter residue ash decrease, and filler retention increases, at paper
Indices have the raising of different amplitudes
Therefore, white water consistency is significantly reduced using light calcium covered fiber filler of the invention, increases white water recycling rate, section
About part rinse dosage；The increase of filler retention, the raising of paper basis weight, ash content can reduce fiber consumption, save paper pulp,
Cost is reduced, environment, the raising of tensile strength, moreover it is possible to improve the quality of paper are protected.
Specific embodiments of the present invention are described in detail above, but it is merely an example, the present invention is simultaneously unlimited
It is formed on particular embodiments described above.To those skilled in the art, any couple of present invention carries out equivalent modifications and
Substitution is also all among scope of the invention.Therefore, without departing from the spirit and scope of the invention made by equal transformation and
Modification, all should be contained within the scope of the invention.
Claims (6)
1. a kind of paper grade (stock) light calcium covered fiber filler, which is characterized in that prepared using the raw material of following parts by weight:
The Polyamide Epoxy molecular weight is 3~60,000, and the Molecular Weight for Polyacrylamide is 300-1000 ten thousand；Specific system
It is standby that steps are as follows:
Step 1, Polyamide Epoxy solution, polyacrylamide solution and cationic starch solution are added to paper pulp in order
In pulp solution, stir；
Step 2, the mixed component of step 1 after mixing evenly is added in calcium hydroxide solution, passes through carbon dioxide gas；
Step 3, control reaction temperature is 10-35 DEG C, reaction time 1-3h, and after abundant carburizing reagent, pH value reaches 8-9, filters, and is steamed
It evaporates, paper grade (stock) light calcium covered fiber filler is made.
2. paper grade (stock) light calcium covered fiber filler according to claim 1, which is characterized in that the calcium hydroxide is configured to
The solution that concentration is 15%~25%, 2 μm of particle contents below are higher than 35%, and whiteness is higher than 87% 。
3. paper grade (stock) light calcium covered fiber filler according to claim 1, which is characterized in that the pulp is needle
Slurry: broad-leaved slurry=1:4~1:5, beating degree are the mixed slurry of 40 ° of SR~45 ° SR.
4. paper grade (stock) light calcium covered fiber filler according to claim 1, which is characterized in that the carbon dioxide gas is dense
Degree is 45%-60%.
5. paper grade (stock) light calcium covered fiber filler according to claim 1, the paper grade (stock) light calcium covered fiber filler is solid
Content is 20%~30%, viscosity is 15~60cps, pH is that 8~9 and 2 μm or less particle contents are higher than 35%.
6. a kind of application of paper grade (stock) light calcium covered fiber filler according to claim 1-4 in papermaking.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101031686A (en) * | 2004-07-14 | 2007-09-05 | 国际纸业公司 | Method to manufacture paper |
| CN101492893A (en) * | 2009-03-03 | 2009-07-29 | 金东纸业（江苏）股份有限公司 | Process for manufacturing calcium carbonate composite fiber and uses thereof |
| CN103154369A (en) * | 2010-08-20 | 2013-06-12 | 芬欧汇川集团公司 | A method and a system for precipitation of calcium carbonate and a product comprising calcium carbonate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10335751A1 (en) * | 2003-08-05 | 2005-03-03 | Voith Paper Patent Gmbh | Method for loading a pulp suspension and arrangement for carrying out the method |
| FI125836B (en) * | 2013-04-26 | 2016-03-15 | Wetend Tech Oy | A method of providing paper or board making furnish with filler and paper or board |
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2015
- 2015-12-17 CN CN201510955220.4A patent/CN106894281B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101031686A (en) * | 2004-07-14 | 2007-09-05 | 国际纸业公司 | Method to manufacture paper |
| CN101492893A (en) * | 2009-03-03 | 2009-07-29 | 金东纸业（江苏）股份有限公司 | Process for manufacturing calcium carbonate composite fiber and uses thereof |
| CN103154369A (en) * | 2010-08-20 | 2013-06-12 | 芬欧汇川集团公司 | A method and a system for precipitation of calcium carbonate and a product comprising calcium carbonate |
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