CN113106775A - Method for improving papermaking water filtering performance by adopting microfibrillated fiber - Google Patents
Method for improving papermaking water filtering performance by adopting microfibrillated fiber Download PDFInfo
- Publication number
- CN113106775A CN113106775A CN202010025723.2A CN202010025723A CN113106775A CN 113106775 A CN113106775 A CN 113106775A CN 202010025723 A CN202010025723 A CN 202010025723A CN 113106775 A CN113106775 A CN 113106775A
- Authority
- CN
- China
- Prior art keywords
- paper
- fiber
- pulp
- microfibrillated
- improving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
- D21H11/18—Highly hydrated, swollen or fibrillatable fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
- D21H11/20—Chemically or biochemically modified fibres
- D21H11/22—Chemically or biochemically modified fibres cationised
-
- 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
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
-
- 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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/06—Paper forming aids
- D21H21/10—Retention agents or drainage improvers
-
- 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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/22—Agents rendering paper porous, absorbent or bulky
- D21H21/24—Surfactants
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Dispersion Chemistry (AREA)
- Paper (AREA)
Abstract
The invention provides a method for improving the water filtering performance of paper by adopting microfibrillated fiber, and particularly relates to a method for improving the water filtering performance of paper by adopting microfibrillated fiber and fine components to form a compound, and then filling the compound into a papermaking process, so that the water filtering and retention performance of the paper can be improved, the ash content in the paper can be effectively improved, and the using amount of paper pulp fiber can be reduced. Under the same paper making process condition, the invention can not only improve the filler content in the paper on the premise of ensuring the strength performance of the paper, but also effectively improve the water filtration and retention performance of the paper making, and effectively solve the problem of reduced water filtration performance caused by the use of microfibrillated fiber in a paper making system. The usage amount of fresh paper pulp can be effectively reduced by adopting the microfibrillated fiber and the fine components obtained by recovering the white water to form a compound and then using the compound for filling paper.
Description
Technical Field
The invention belongs to the technical field of pulping and papermaking, and particularly relates to a method for improving the water filtering performance of paper by adopting microfibrillated fiber.
Background
With the growing consumption of paper and paperboard and the rapid increase in the production capacity of the paper making industry, the supply of fiber raw materials has become a bottleneck restricting the development of the industry. Currently, the global paper-making raw material is still under tension, and how to replace paper pulp with as much mineral filler as possible and improve the utilization rate of fiber has become a development trend of paper-making technology.
Conventional fillers and filling methods tend to reduce the strength of the bond between the fibers in the slurry. Currently, conventional filler loading is used in papermaking, and by optimizing the retention and drainage aid system and increasing the amount of retention and drainage aids and optimizing the more efficient reinforcing agents and increasing the amount, the paper ash content achievable in actual production is around 28%. A common method of increasing paper strength is to add high molecular weight polymers, such as cationic starch or cationic synthetic polymers, to the pulp furnish. These high molecular weight polymers, while improving the interfiber bond strength in the paper, still result in reduced interfiber interactions due to the presence of the filler. To further increase the ash content in the paper, more high molecular weight polymer must be added to the pulp furnish, one of the adverse effects of which is to cause a drastic deterioration in the formation of the paper.
Microfibrillated cellulose, also known as nanofibrillated cellulose, has emerged to provide a new technical approach to increase pulp fiber utilization and to increase the amount of inorganic filler used.
CN201180047539.7 'cellulose-enhanced high mineral content product and a preparation method thereof', relates to a paper pulp ingredient with filler content of 50-90% used in papermaking and a paper filling method thereof. The technical scheme includes that an anionic adhesive is used for irreversibly fixing filler particles on the surface of fibers, the fibers are composed of chemical pulp of softwood and thermomechanical pulp of softwood, and one or more of cellulose nanofibrils, microfibrillated cellulose and nanofibril fibers, and the composition can be used for producing 80-400 g/m by using a conventional papermaking method2The ultra-high filled paper. Patent CN201110058981.1 'cationization modification method of nanocellulose and preparation method of high-strength cigarette paper', the patent cationizes nanocellulose by etherification, and when the nanocellulose is used in cigarette paper, on one hand, the paper strength and wet part retention can be improved, and on the other hand, the dosage of softwood pulp can be reduced, and the devillicate and brooming of hardwood pulp can be reduced, so that the aim of reducing production cost is achieved. Patent CN 201510232381.0' for producing ingredientsThe technical scheme adopted is that during the preparation of the furnish, the surface of the filler is modified by adsorbing cationic polyelectrolyte and nanofibrillated cellulose (NFC), and the modification mode can be that the filler is firstly modified with cationic polyelectrolyte and nanofibrillated cellulose and then added into a fiber suspension, or can be that the cationic polyelectrolyte and NFC are firstly added into the fiber suspension and then the filler is added into the fiber suspension. CN201180020953.9 "method for making a structured material using nanofibrillar cellulose gel" combines fibrillated fibres containing fillers with non-fibrillated fibres to obtain a structured material, which is paper, with the aim of increasing the strength properties of the paper and increasing the filler content in the paper.
The microfibrillated fiber can effectively improve the strength performance of paper, but the microfibrillated fiber contains abundant hydrophilic groups on the surface, so that the problem of water drainage can be caused when the microfibrillated fiber is directly used.
Disclosure of Invention
The invention aims to provide a method for improving the water filtering performance of papermaking, which adopts microfibrillated fiber and fine components to form a compound, and then the compound is added into the papermaking process, so that the water filtering and retention performance of the paper can be improved, the ash content in the paper can be effectively improved, and the using amount of paper pulp fiber can be reduced. The fine components include fillers for papermaking and fine components obtained by recovering white water.
In order to realize the purpose of the invention, the adopted technical scheme is as follows:
(1) and pulping the fully defibered paper pulp fibers by a pulping machine, adjusting the concentration of the fully defibered paper pulp fibers to 2-10%, adding a cationic surfactant into the paper pulp suspension, and fully and uniformly mixing, wherein the dosage of the cationic surfactant is 0.1-1% of the absolutely dry paper pulp cellulose. And grinding the uniformly mixed pulp fiber suspension in a grinder to prepare the microfibrillated fiber with the cationized surface, wherein the median particle size of the cationized microfibrillated fiber is controlled to be 1-100 mu m.
(2) Fully mixing the cationized microfibrillated fiber obtained by grinding with the fine component, and continuously grinding in a grinding machine until the microfibrillated fiber and the fine component form a stable compound, wherein the dosage of the microfibrillated fiber is 1-100% of the content of the absolutely dry fine component.
(3) The microfibrillated fiber-fine component compound is added into paper pulp to be uniformly mixed, and a paper making auxiliary agent is added to prepare paper.
The cationic surfactant comprises cationic amino and imino groups, and comprises low molecular weight cationic polyacrylamide, polydiallyldimethylammonium chloride and polyamine.
The pulp fiber comprises softwood pulp, hardwood pulp, bamboo pulp and other non-wood pulp.
The filler for papermaking is mainly inorganic pigment, and comprises ground calcium carbonate, precipitated calcium carbonate, white mud calcium carbonate, porcelain clay, talcum powder and calcium sulfate. Among the preferred fillers are precipitated calcium carbonate and ground calcium carbonate.
The grinder is an upper and a lower nonporous millstone mortar type ultramicron grinder with adjustable clearance, and the clearance is in micron level.
Under the same paper making process condition, the invention can not only improve the filler content in the paper on the premise of ensuring the strength performance of the paper, but also effectively improve the water filtration and retention performance of the paper making, and effectively solve the problem of reduced water filtration performance caused by the use of microfibrillated fiber in a paper making system. The usage amount of fresh paper pulp can be effectively reduced by adopting the microfibrillated fiber and the fine components obtained by recovering the white water to form a compound and then using the compound for filling paper.
Drawings
FIG. 1 dynamic drainage profiles for the stocks of examples 1-4.
Detailed Description
The present invention is further described below with reference to specific examples, but the embodiments of the present invention are not limited thereto.
Example 1
(1) Fully defibering hardwood chemical pulp in a beating machine, adjusting the solid content of defibered fiber to 3.5%, grinding the defibered fiber on a grinder to prepare microfibrillated cellulose, and selecting a grinding gap of-2 microns to obtain the microfibrillated cellulose with the median particle size of 21 microns.
(2) Mixing bleached sulfate softwood pulp (the beating degree is 40-45 DEG SR) and bleached sulfate hardwood pulp (the beating degree is 37-42 DEG SR) according to the mass ratio of 30: 70, sequentially adding 5% of microfibrillated cellulose, 50% of GCC, 1% of cationic starch, 0.2% of AKD sizing agent and 0.03% of cationic polyacrylamide retention aid, uniformly mixing, adding water to dilute until the pulp concentration is 0.5%, papermaking by using a standard paper sheet former, and quantifying 60g/m of paper sheet2. The drainage properties of the stock are shown in figure 1 and table 1, and the paper properties are shown in table 2.
The drainage performance of the paper stock is expressed by the suction filtration dryness. The method for measuring the suction filtration dryness comprises the following steps: 200g of paper material with pulp concentration of 0.5% is taken, and after the paper material is stably filtered for 30s under the condition that the vacuum degree is-0.1 MPa, the dryness of the wet paper material filter cake is measured, namely the filtration dryness. Under the same suction filtration condition, the higher the suction filtration dryness, the better the water filtration performance.
Example 2
(1) Fully defibering hardwood chemical pulp in a pulping machine, adjusting the solid content of defibered fiber to 3.0%, adding 0.5% of poly (diallyl dimethyl ammonium chloride) into the suspension, and fully and uniformly mixing. And grinding the uniformly mixed pulp fiber suspension on a grinding machine to prepare microfibrillated cellulose, wherein the median particle size of the microfibrillated cellulose obtained by selecting a grinding gap of-2 um is 16.3 um.
(2) After the ground microfibrillated cellulose was thoroughly mixed with GCC, the grinding was continued in a grinder until a composite of microfibrillated cellulose and filler was formed, the amount of microfibrillated cellulose being 5% based on the absolutely dry GCC.
(3) Mixing bleached sulfate softwood pulp (beating degree of 40-45 DEG SR) and bleached sulfate hardwood pulp (beating degree of 37-42 DEG SR) according to a mass ratio of 30: 70, sequentially adding 55% of microfibrillated fiber-filler compound, 1% of cationic starch, 0.2% of AKD sizing agent and 0.03% of cationic polyacrylamide retention aid, uniformly mixing, adding water to dilute until the concentration of pulp is 0.5%, and performing standard paper sheet forming by using a standard paper sheet formerPapermaking, the basis weight of paper sheet is 60g/m2. The drainage properties of the stock are shown in figure 1 and table 1, and the paper properties are shown in table 2.
Example 3
(1) Fully defibering bleached bamboo pulp in a pulping machine, adjusting the solid content of defibered fiber to 4.5%, adding 0.25% of polyamine into the suspension, and fully and uniformly mixing. And grinding the uniformly mixed pulp fiber suspension on a grinding machine to prepare microfibrillated cellulose, wherein the median particle size of the obtained microfibrillated cellulose is 68.9um, and the grinding gap is selected to be-5 um.
(2) And (3) fully mixing the ground microfibrillated cellulose and the porcelain clay, and continuously grinding in a grinding machine until a microfibrillated fiber and filler compound is formed, wherein the dosage of the microfibrillated cellulose is 10 percent of the amount of the absolutely dry porcelain clay.
(3) Mixing bleached sulfate softwood pulp (the beating degree is 40-45 DEG SR) and bleached sulfate hardwood pulp (the beating degree is 37-42 DEG SR) according to the mass ratio of 30: 70, sequentially adding 55% of microfibrillated fiber-filler compound, 1% of cationic starch, 0.2% of AKD sizing agent and 0.03% of cationic polyacrylamide retention aid, uniformly mixing, adding water to dilute until the concentration of pulp is 0.5%, papermaking by using a standard paper sheet former, and quantitatively making paper sheets with the paper sheets of 60g/m2. The drainage properties of the stock are shown in figure 1 and table 1, and the paper properties are shown in table 2.
Example 4
(1) Fully defibering the softwood chemical pulp in a pulping machine, then adjusting the solid content of the defibered fiber to 2%, adding 0.35% of polyamine into the suspension, and fully and uniformly mixing. And grinding the uniformly mixed pulp fiber suspension on a grinding machine to prepare microfibrillated cellulose, wherein the median particle size of the microfibrillated cellulose obtained by selecting a grinding gap of-2 um is 70.7 um.
(2) After the ground microfibrillated cellulose was thoroughly mixed with GCC, the grinding was continued in a grinder until a composite of microfibrillated cellulose and filler was formed, the amount of microfibrillated cellulose being 5% based on the absolutely dry GCC.
(3) Bleaching sulfate softwood pulp (beating degree of 40-45 DEG SR) and bleaching sulfateBroad-leaved wood pulp (beating degree 37-42 DEG SR) is mixed according to the mass ratio of 30: 70, 55% of microfibrillated fiber-filler compound, 1% of cationic starch, 0.2% of AKD sizing agent and 0.03% of cationic polyacrylamide retention aid are sequentially added, the mixture is uniformly mixed, water is added for dilution until the concentration of pulp is 0.5%, a standard paper sheet former is used for papermaking, the paper sheet ration is 60g/m2. The drainage properties of the stock are shown in figure 1 and table 1, and the paper properties are shown in table 2.
TABLE 1 dryness of the stock from the examples
| Numbering | Example 1 | Example 2 | Example 3 | Example 4 |
| The dryness of the paper stock is filtered | 30.8 | 35.0 | 40.4 | 40.0 |
TABLE 2 paper Properties
The invention is implemented according to the above specific embodiments, all achieving the desired effect.
Claims (7)
1. A method for improving the water filtering performance of paper making by using microfibrillated fiber includes such steps as preparing the composite of microfibrillated fiber and fine component, and filling it in paper making process.
2. The method for improving the water filtering performance of papermaking according to claim 1, wherein the microfibrillation process of the fiber comprises the steps of pulping the fully defibered pulp fiber by a pulping machine, adjusting the concentration to 2-10%, adding a cationic surfactant into the pulp suspension, fully and uniformly mixing, wherein the dosage of the cationic surfactant is 0.1-1% of the amount of absolutely dry pulp cellulose, grinding the uniformly mixed pulp fiber suspension in a grinding machine to obtain the surface cationized microfibrillated fiber, and controlling the median particle size of the cationized fiber to be 1-100 μm.
3. A method of improving drainage on a paper sheet as claimed in claim 1 wherein said fines include papermaking filler and white water recovered fines.
4. The method for improving the drainage performance of papermaking according to claim 1, wherein the microfibrillated fiber forms a stable composite with the fine component, and the amount of the microfibrillated fiber is 1 to 100% based on the content of the oven-dried fine component.
5. A method of improving water drainage in papermaking as set forth in claim 1 wherein said pulp fibers comprise softwood pulp, hardwood pulp, bamboo pulp, and other non-wood pulps.
6. The method of claim 1, wherein the cationic surfactant comprises cationic amino and imino groups, including low molecular weight cationic polyacrylamides, polydiallyldimethylammonium chloride, and polyamines.
7. A method of improving the drainage of papermaking as claimed in claim 1 wherein the papermaking filler is mainly an inorganic pigment including ground calcium carbonate, precipitated calcium carbonate, white clay calcium carbonate, china clay, talc and calcium sulfate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010025723.2A CN113106775B (en) | 2020-01-10 | 2020-01-10 | Method for improving papermaking drainage performance by adopting microfibrillated fibers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010025723.2A CN113106775B (en) | 2020-01-10 | 2020-01-10 | Method for improving papermaking drainage performance by adopting microfibrillated fibers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113106775A true CN113106775A (en) | 2021-07-13 |
| CN113106775B CN113106775B (en) | 2023-05-12 |
Family
ID=76709880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010025723.2A Active CN113106775B (en) | 2020-01-10 | 2020-01-10 | Method for improving papermaking drainage performance by adopting microfibrillated fibers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113106775B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115075047A (en) * | 2022-06-17 | 2022-09-20 | 牡丹江恒丰纸业股份有限公司 | Papermaking method for improving retention rate of titanium dioxide in paper sheet |
| CN116263035A (en) * | 2023-02-20 | 2023-06-16 | 浙江景兴纸业股份有限公司 | Method for recycling secondary starch in OCC pulping process and application |
| CN116695486A (en) * | 2022-02-25 | 2023-09-05 | 中国制浆造纸研究院有限公司 | Method for improving dispersion uniformity of pigment in decorative base paper |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103966888A (en) * | 2013-02-05 | 2014-08-06 | 金东纸业（江苏）股份有限公司 | Compound and preparation method thereof, and pulp and paper using compound |
| CN104452425A (en) * | 2014-11-06 | 2015-03-25 | 陕西科技大学 | Microfiber cellulose enveloped and retained high filling papermaking process |
| CN104863008A (en) * | 2015-04-23 | 2015-08-26 | 中国制浆造纸研究院 | Method using microfibrillated cellulose modified filling material for improving paper nontransparency |
| CN105887555A (en) * | 2016-04-13 | 2016-08-24 | 陕西科技大学 | Papermaking method capable of improving paper forming strength performance |
| US20160273165A1 (en) * | 2011-01-20 | 2016-09-22 | Upm-Kymmene Corporation | Method for improving strength and retention, and paper product |
| WO2016185397A1 (en) * | 2015-05-21 | 2016-11-24 | Stora Enso Oyj | Production of nanosized precipitated calcium carbonate and use in improving dewatering of fiber webs |
| CN108797182A (en) * | 2018-06-14 | 2018-11-13 | 华南理工大学 | A method of paper pulp fiber retention and intensity are improved based on fibrillation fiber |
-
2020
- 2020-01-10 CN CN202010025723.2A patent/CN113106775B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160273165A1 (en) * | 2011-01-20 | 2016-09-22 | Upm-Kymmene Corporation | Method for improving strength and retention, and paper product |
| CN103966888A (en) * | 2013-02-05 | 2014-08-06 | 金东纸业（江苏）股份有限公司 | Compound and preparation method thereof, and pulp and paper using compound |
| CN104452425A (en) * | 2014-11-06 | 2015-03-25 | 陕西科技大学 | Microfiber cellulose enveloped and retained high filling papermaking process |
| CN104863008A (en) * | 2015-04-23 | 2015-08-26 | 中国制浆造纸研究院 | Method using microfibrillated cellulose modified filling material for improving paper nontransparency |
| WO2016185397A1 (en) * | 2015-05-21 | 2016-11-24 | Stora Enso Oyj | Production of nanosized precipitated calcium carbonate and use in improving dewatering of fiber webs |
| CN105887555A (en) * | 2016-04-13 | 2016-08-24 | 陕西科技大学 | Papermaking method capable of improving paper forming strength performance |
| CN108797182A (en) * | 2018-06-14 | 2018-11-13 | 华南理工大学 | A method of paper pulp fiber retention and intensity are improved based on fibrillation fiber |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116695486A (en) * | 2022-02-25 | 2023-09-05 | 中国制浆造纸研究院有限公司 | Method for improving dispersion uniformity of pigment in decorative base paper |
| CN115075047A (en) * | 2022-06-17 | 2022-09-20 | 牡丹江恒丰纸业股份有限公司 | Papermaking method for improving retention rate of titanium dioxide in paper sheet |
| CN116263035A (en) * | 2023-02-20 | 2023-06-16 | 浙江景兴纸业股份有限公司 | Method for recycling secondary starch in OCC pulping process and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113106775B (en) | 2023-05-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113106775B (en) | Method for improving papermaking drainage performance by adopting microfibrillated fibers | |
| US9506197B2 (en) | Method for producing furnish, furnish and paper | |
| CA2113740C (en) | Production of filled paper | |
| FI68283C (en) | FOERFARANDE FOER PAPPERSTILLVERKNING | |
| FI126216B (en) | Method for making board | |
| FI126041B (en) | Method for controlling retention and intermediate used in the process | |
| US20130180680A1 (en) | Paper or paperboard product and a process for production of a paper or paperboard product | |
| EP0960236B1 (en) | Lumen loading of mineral filler into cellulose fibers for papermaking | |
| US20100218908A1 (en) | Fibrous web and process for the preparation thereof | |
| CA2637192A1 (en) | Papermaking processes using coagulants and optical brighteners | |
| US20160273165A1 (en) | Method for improving strength and retention, and paper product | |
| Ankerfors et al. | The use of microfibrillated cellulose in fine paper manufacturing–Results from a pilot scale papermaking trial | |
| CN113195827B (en) | Method for producing paper or board and product thereof | |
| CN101725074B (en) | Method for increasing retention of paper filler | |
| CN104863008A (en) | Method using microfibrillated cellulose modified filling material for improving paper nontransparency | |
| Chauhan et al. | Energy savings through increased filler loading in paper | |
| EP3458646B1 (en) | Treatment system for making of paper | |
| Nordström et al. | Effect of fiber length on formation and strength efficiency in twin-wire roll forming | |
| EP3066260B1 (en) | Manufacture of paper and paperboard containing wood free pulp | |
| CA2405649C (en) | Papermaking furnish comprising solventless cationic polymer retention aid combined with phenolic resin and polyethylene oxide | |
| US20240026606A1 (en) | Method for separating cellulosic particulates out of fiber suspensions and/or filtrates | |
| CN116815540A (en) | Packing coating method, paper and preparation method thereof | |
| WO2023111804A1 (en) | Strength enhancement agent for paper and paperboard | |
| CN117926614A (en) | Recycled paper pulp preparation method, recycled paper pulp and paper preparation method | |
| JP2003278091A (en) | Bulky paper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |