CN114575194B - Magnetic material filter paper and production process and application thereof - Google Patents

Magnetic material filter paper and production process and application thereof Download PDF

Info

Publication number
CN114575194B
CN114575194B CN202210156011.3A CN202210156011A CN114575194B CN 114575194 B CN114575194 B CN 114575194B CN 202210156011 A CN202210156011 A CN 202210156011A CN 114575194 B CN114575194 B CN 114575194B
Authority
CN
China
Prior art keywords
pulp
paper
surface sizing
slurry
concentration
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.)
Active
Application number
CN202210156011.3A
Other languages
Chinese (zh)
Other versions
CN114575194A (en
Inventor
周振宇
占浩
张必强
郑蓉
何江
颜鲁呜
郭婉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Kan Special Paper Co ltd
Zhejiang Kan Specialties Material Co ltd
Zhejiang Kaien New Material Co ltd
Original Assignee
Zhejiang Kan Special Paper Co ltd
Zhejiang Kan Specialties Material Co ltd
Zhejiang Kaien New Material Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang Kan Special Paper Co ltd, Zhejiang Kan Specialties Material Co ltd, Zhejiang Kaien New Material Co ltd filed Critical Zhejiang Kan Special Paper Co ltd
Priority to CN202210156011.3A priority Critical patent/CN114575194B/en
Publication of CN114575194A publication Critical patent/CN114575194A/en
Application granted granted Critical
Publication of CN114575194B publication Critical patent/CN114575194B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/08—Filter paper
    • 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
    • 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
    • D21H11/14—Secondary 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
    • 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
    • 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
    • D21H17/36—Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
    • 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
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • 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
    • D21H21/16—Sizing or water-repelling agents
    • 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
    • D21H21/18—Reinforcing agents
    • D21H21/20—Wet strength agents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)

Abstract

The invention belongs to the technical field of filter materials required by permanent magnetic ferrite production, and particularly relates to magnetic material filter paper and a production process and application thereof. The magnetic material filter paper is prepared from the following pulp materials in percentage by mass: 75-85% of softwood pulp and 15-25% of hardwood pulp; or the slurry is selected from a second slurry: 65-75% of softwood pulp, 25-35% of bamboo pulp, and the beating degree of the first pulp is controlled as follows: 16-20 DEG SR, and the beating degree of the second slurry is controlled as follows: 18-25 ° SR; adding wet strength agent with the weight of 1.0-6.0% of the pulp into the pulp in the pulp preparation; after papermaking, drying paper surface sizing, wherein the dosage of the surface sizing solution is 10-60kg/t paper; the invention can meet the production requirements of magnetic tiles, namely, the filter screen has good water absorption and water filtering performance, the water filtering is stable in the whole process, but the slurry cannot leak, and meanwhile, the invention also has the characteristics of good tensile strength and wet strength, small aperture and the like of the filter screen, and can naturally degrade the magnetic material filter paper.

Description

Magnetic material filter paper and production process and application thereof
Technical Field
The invention belongs to the technical field of filter materials required by permanent magnetic ferrite production, and particularly relates to magnetic material filter paper and a production process and application thereof.
Background
The magnetic material filter paper is mainly used for producing a permanent magnetic ferrite molding blank, and is in direct contact with the magnetic shoe molding blank in the using process, so that the functions of water absorption and filtration molding are achieved. The permanent magnetic ferrite magnetic shoe is a novel non-metallic magnetic material, and can generate a stable magnetic field only by providing external magnetizing energy once, thereby continuously providing magnetic energy to the outside. The magnetic material has the characteristics of higher magnetic performance, good high and low temperature resistance, lower production cost of products and the like, and is widely applied to the fields of automobile permanent magnet motors, energy-saving household appliance motors, electroacoustic, mineral separation, magnetic transmission, sensors, microwave devices and the like. The production process flow chart of the permanent ferrite magnetic shoe comprises the following steps: ball-milling raw material powder (ball-milling) to obtain the granularity required by the process, adding formula material and water (precipitation) slurry into a centrifugal dehydrator, automatically controlling the water content of the slurry to meet the requirement (forming) specified by the process, injecting the precipitated slurry into a grinding tool through a conveying pipeline, after compression forming, checking the appearance of a green body, and putting the green body into a green body turnover box for (sintering) (grinding) (cleaning) (sorting and checking) (packaging and warehousing). After the slurry is injected into the grinding tool in the forming process, the upper part of the slurry is directly contacted with the filter screen cloth, the moisture in the slurry is greatly pumped out through vacuum suction, and then the slurry is pressed and formed under high pressure. The water content of the slurry for making the magnetic tile in the production flow is generally 30-40%, the particle size of the powder in the slurry is generally controlled to be 0.5-1.0 micron, when the slurry is pressed and formed in the production process, the whole pressing process (simultaneously, the filtration and dehydration process) needs 100-120 seconds, the highest pressing pressure needs to reach 10-15MP, and the pressure is very high. The filter mesh cloth plays a role in water absorption and filter forming, so that the filter mesh cloth is required to have good water absorption and water filtration performance, the water filtration is stable in the whole process, and the slurry cannot leak, and the filter cloth is required to have the characteristics of good tensile strength and wet strength, small pore diameter and the like. At present, the magnetic shoe manufacturers all use non-woven fabrics made of chemical fibers as filter screen cloth. The filter cloth produced by using chemical fibers as raw materials has the aperture reaching 80-100 microns, when the filter cloth is used, a part of slurry can seep in, and can penetrate through the non-woven filter cloth when the filter cloth is serious, and certain slurry is bonded on the non-woven filter cloth after the filter cloth is used, so that the raw materials are lost, and the quality is influenced. The non-woven fabric can not be regenerated and reused after being used, can only be discarded, and can not be naturally degraded to cause greater pollution to the environment. Therefore, it is desirable to develop a filter mesh cloth which can meet the production requirements of the magnetic tiles and can be naturally degraded.
Disclosure of Invention
The invention aims to provide the magnetic material filter paper which can meet the production requirements of magnetic tiles, namely, the filter screen has good water absorption and water filtration performance, the water filtration is stable in the whole process, but the pulp cannot leak, and the filter screen has the characteristics of good tensile strength, wet strength, small aperture and the like and can be naturally degraded.
In order to achieve the purpose, the invention adopts the following technical scheme:
the magnetic material filter paper is prepared from the following pulp materials in percentage by mass: 75-85% of softwood pulp and 15-25% of hardwood pulp; or the slurry is selected from the following second slurry: 65-75% of softwood pulp, 25-35% of bamboo pulp, and the beating degree of the first pulp is controlled as follows: 16-20 DEG SR, and the beating degree of the second slurry is controlled as follows: 18-25 ° SR; and adding wet strength agent with the weight of 1.0-6.0% of the pulp into the pulp in the pulp preparation; after the paper making is finished, the paper surface is dried and sized, and the dosage of the surface sizing solution is 10-60kg/t paper; quantification of the magnetic material filter paper: 55-65g/m 2 Air permeability: 80-1000CU, longitudinal tensile Strength: not less than 3.0kN/m, transverse tensile strength: not less than 1.0kN/m 2 Longitudinal wet strength: not less than 1.0kN/m 2 Transverse wet strength: more than or equal to 0.4kN/m, water absorption: not less than 150g/m 2 The pore diameter: 2-5 μm.
Preferably, one or both of PAE and PPE are used as the wet strength agent.
As a further preference, the wet strength agent is added in an amount of 3.0% to 4.0%.
Preferably, the surface sizing solution is a PVA solution, a starch solution, or a hydrophilic acrylate solution.
Preferably, the PVA solution has the mass percentage concentration of 1-4% and the use amount of 10-50kg/t paper; the mass percentage concentration of the starch solution is 1-5%, and the dosage is 10-50kg/t paper; the mass percentage concentration of the acrylate solution is 1-6%, and the dosage is 10-60kg/t paper.
Preferably, the PVA solution has a mass percent concentration of 1.5-3.0%; the mass percentage concentration of the starch solution is 2.0-4.0%; the mass percentage concentration of the hydrophilic acrylate solution is 3.0-5.0%.
Preferably, the starch is one or more of native starch and modified starch.
Furthermore, the invention also discloses a production process of the magnetic material filter paper, which comprises the following steps:
1) Proportioning the slurry: selecting 75-85% of softwood pulp and 15-25% of hardwood pulp as pulp according to mass percentage;
2) Fluffing and pulping: mixing and pulping various pulp plates by a pulper, soaking, then performing defibering and pulping, and controlling the pulp grinding concentration to be 5.5-6.0%; the beating degree is controlled as follows: SR at 16-20 degrees, and the wet weight is more than or equal to 6.5g;
3) Slurry preparation: preparing ground wood pulp in a pulp preparing pool according to a certain proportion, mixing, adding a wet strength agent, and diluting to a concentration of 0.8% -1.0%; wet strength agent addition amount: 1.0 to 3.0 percent.
4) Manufacturing paper: diluting the prepared slurry to 0.1-0.5%, pumping the slurry to a front pool, forming the slurry on a net by a fan pump, squeezing and drying;
5) Surface sizing: feeding the paper sheet dried in the previous process into a surface sizing device for surface sizing; the concentration of the surface sizing liquid is 1.0-4.0%, and the dosage is 10-60kg/t paper;
6) Paper dosing controlPrepared at 55-65g/m 2 ；
7) Drying, coiling, cutting and packaging.
Furthermore, the invention also discloses another production process of the magnetic material filter paper, which comprises the following steps:
1) Proportioning the slurry: 65-75% of softwood pulp and 25-35% of bamboo pulp are selected as pulp according to the mass percentage;
2) Defibering and pulping: mixing and pulping various pulp boards by a pulper, soaking, then performing defibering and pulping, and controlling the pulp grinding concentration to be 4.5-6.0%; the beating degree is controlled as follows: SR at 18-25 degrees, and wet weight is more than or equal to 6g;
3) Slurry preparation: preparing ground wood pulp in a pulp preparing pool according to a certain proportion, mixing, adding a wet strength agent, and diluting to the concentration of 0.8-1.0%; wet strength agent addition amount: 2.0 to 6.0 percent.
4) Manufacturing paper: diluting the prepared slurry to 0.1-0.5%, pumping the slurry to a front pool, forming the slurry on a net by a fan pump, squeezing and drying;
5) Surface sizing: feeding the paper sheet dried in the previous process into a surface sizing device for surface sizing; the concentration of the surface sizing solution is 2.0-6.0%, and the dosage is 10-60kg/t paper;
6) The quantitative control of paper is 55-65g/m 2 ；
7) Drying, coiling, cutting and packaging.
Furthermore, the invention also discloses application of the magnetic material filter paper in slurry powder filtration in permanent magnetic ferrite production.
The invention has the beneficial effects that: the invention provides magnetic material filter paper which is prepared by the method of the technical scheme. Paper index: and (3) quantification: 55-65g/m 2 Air permeability: 80-800CU, tensile strength (machine direction): not less than 3.0kN/m, tensile strength (transverse direction): not less than 1.0kN/m 2 Wet strength (machine direction): not less than 1.0kN/m 2 Wet strength (cross direction): not less than 0.4kN/m, water absorption: not less than 150g/m 2 The pore diameter: 2-5 μm. The invention provides a filter screen of the magnetic material filter paper prepared by the preparation method in the technical scheme in the production of the permanent magnetic ferrite magnetic shoeThe application of the filter screen ensures that the paper has proper water filtering performance, can prevent excessive slurry from seeping into or permeating through the paper serving as the filter screen, and can meet the use requirements of the paper. The magnetic material filter paper is made of 100% of plant fibers, and can be naturally degraded in nature after being used.
Detailed Description
The following examples are included to further illustrate the practice of the invention, but the practice and scope of the invention is not limited thereto.
A production process of magnetic material filter paper comprises the following steps: wood pulp disintegrating, fiber dispersing, defibering and pulping, adding auxiliary agents, pulp mixing, deslagging, net-screening forming (papermaking), squeezing, drying in the front process, surface sizing, drying in the rear process, reeling, inspecting, slitting and packaging and the like.
The present invention is further illustrated by the following specific examples.
Example 1
1) Proportioning the slurry: adding 80% of softwood pulp and 20% of hardwood pulp in percentage by mass into a pulper for pulping;
2) Fluffing and pulping: mixing and pulping various pulp boards by a pulper, soaking, then performing defibering and pulping, and controlling the pulp grinding concentration to be 5.5-6.0%; the beating degree is controlled as follows: 16-18 DEG SR, and the wet weight is more than or equal to 6.5g. After the defibering and pulping are finished, placing the pulp into a pulping tank;
3) Slurry preparation: preparing ground wood pulp in a pulp preparing pool according to a certain proportion, mixing, adding a wet strength agent, and diluting to the concentration of 0.8-1.0%; wet strength agent addition amount: 2.0 percent.
4) Manufacturing paper: diluting the prepared slurry to 0.1-0.3%, pumping the slurry to a front pool, forming the slurry on a net by a fan pump, squeezing and drying;
5) Surface sizing: the paper sheet dried in the previous process enters a surface sizing device for surface sizing, the surface sizing liquid completely immerses the paper sheet, and the surface sizing liquid is uniformly coated on the paper sheet through uniform extrusion of the surface sizing roller; the surface sizing solution is PVA solution, and the concentration of the surface sizing solution is 2-3%.
6) The quantitative rate of paper is controlled to be 55-58g/m 2 。
7) Drying, coiling, cutting and packaging.
The detection results are shown in the attached table.
Example 2
1) Proportioning the slurry: adding softwood pulp with the mass percentage of 85% and hardwood pulp with the mass percentage of 15% into a pulper for pulping;
2) Fluffing and pulping: mixing and pulping various pulp boards by a pulper, soaking, then performing defibering and pulping, and controlling the pulp grinding concentration to be 5.5-6.0%; the beating degree is controlled as follows: 18-20 0 SR, wet weight is more than or equal to 7g. After the defibering and pulping are finished, placing the pulp into a pulping tank;
3) Slurry preparation: preparing ground wood pulp in a pulp preparing pool according to a certain proportion, mixing, adding a wet strength agent, and diluting to a concentration of 0.8-1.0%; wet strength agent addition amount: 2.0 percent
4) Manufacturing paper: diluting the prepared slurry to 0.1-0.3%, pumping the slurry to a front pool, forming the slurry on a net by a fan pump, squeezing and drying;
5) Surface sizing: the paper sheet dried in the previous process enters a surface sizing device for surface sizing, the surface sizing liquid completely immerses the paper sheet, and the surface sizing liquid is uniformly coated on the paper sheet through uniform extrusion of the surface sizing roller; the surface sizing solution is starch solution, and the concentration of the surface sizing solution is 2-3%.
6) The quantitative rate of paper is controlled at 57-60g/m 2 。
7) Drying, coiling, cutting and packaging.
The detection results are shown in the attached table.
Example 3
1) Proportioning the slurry: adding 65% of softwood pulp and 35% of bamboo pulp in percentage by mass into a pulper for pulping;
2) Fluffing and pulping: mixing and pulping various pulp boards by a pulper, soaking, then performing defibering and pulping, and controlling the pulp grinding concentration to be 5.5-6.0%; the beating degree is controlled as follows: 21-23 DEG SR, and the wet weight is more than or equal to 6g. After the defibering and pulping are finished, placing the pulp into a pulping tank;
3) Slurry preparation: preparing ground wood pulp in a pulp preparing pool according to a certain proportion, mixing, adding a wet strength agent, and diluting to the concentration of 0.8-1.0%; wet strength agent addition amount: 2.0 percent
4) Manufacturing paper: diluting the prepared slurry to 0.1-0.3%, pumping the slurry to a front pool, forming the slurry on a net by a fan pump, squeezing and drying;
5) Surface sizing: the paper sheet dried in the previous process enters a surface sizing device for surface sizing, the surface sizing liquid completely immerses the paper sheet, and the surface sizing liquid is uniformly coated on the paper sheet through uniform extrusion of the surface sizing roller; the surface sizing solution is hydrophilic acrylic latex solution, and the concentration of the surface sizing solution is 4-5%.
6) The quantitative control of paper is 62-65g/m 2 。
7) Drying, coiling, cutting and packaging.
The detection results are shown in the attached table.
Example 4
1) Proportioning the slurry: adding 70% of softwood pulp and 30% of bamboo pulp in percentage by mass into a pulper for pulping;
2) Fluffing and pulping: mixing and pulping various pulp boards by a pulper, soaking, then performing defibering and pulping, and controlling the pulp grinding concentration to be 4.5-5.5%; the beating degree is controlled as follows: 20-22 0 SR, wet weight is more than or equal to 6g. After the defibering and pulping are finished, placing the pulp into a pulping tank;
3) Slurry preparation: preparing ground wood pulp in a pulp preparing pool according to a certain proportion, mixing, adding a wet strength agent, and diluting to the concentration of 0.8-1.0%; wet strength agent addition amount: 3.0 percent
4) Manufacturing paper: diluting the prepared slurry to 0.2-0.4% concentration, pumping to a front papermaking pool, forming by a fan pump, squeezing and drying;
5) Surface sizing: feeding the paper sheet dried in the previous process into a surface sizing device for surface sizing, completely immersing the paper sheet by surface sizing liquid, and uniformly coating the surface sizing liquid on the paper sheet through uniform extrusion of the surface sizing roller; the surface sizing liquid is hydrophilic acrylic latex solution, and the concentration of the surface sizing liquid is 4-5%.
6) The quantitative rate of paper is controlled at 60-63g/m 2 。
7) Drying, coiling, cutting and packaging.
The detection results are shown in the attached table.
Example 5
1) Proportioning the slurry: adding 75% of softwood pulp and 25% of bamboo pulp in percentage by mass into a pulper for pulping;
2) Fluffing and pulping: mixing and pulping various pulp boards by a pulper, soaking, then performing defibering and pulping, and controlling the pulp grinding concentration to be 4.5-5.5%; the beating degree is controlled as follows: 19-21 0 SR, wet weight is more than or equal to 7g. After the defibering and pulping are finished, placing the pulp into a pulping tank;
3) Slurry preparation: preparing ground wood pulp in a pulp preparing pool according to a certain proportion, mixing, adding a wet strength agent, and diluting to the concentration of 0.8-1.0%; wet strength agent addition amount: 4.0 percent
4) Manufacturing paper: diluting the prepared slurry to 0.2-0.4% concentration, pumping to a front papermaking pool, forming by a fan pump, squeezing and drying;
5) Surface sizing: the paper sheet dried in the previous process enters a surface sizing device for surface sizing, the surface sizing liquid completely immerses the paper sheet, and the surface sizing liquid is uniformly coated on the paper sheet through uniform extrusion of the surface sizing roller; the surface sizing solution is PVA solution, and the concentration of the surface sizing solution is 2-3%.
6) The quantitative rate of paper is controlled to be 58-61g/m 2 。
6) Drying, coiling, cutting and packaging.
The detection results are shown in the attached table.
Comparative example 1
Non-woven fabrics which are taken as filter screen cloth on the existing magnetic shoe production line.
The detection results are shown in the attached table.
Comparative example 2
Non-woven fabrics which are taken as filter screen cloth on the existing magnetic shoe production line.
The detection results are shown in the attached table.
Comparative example 3
1) Proportioning the slurry: adding 100 mass percent of softwood pulp into a pulper for pulping;
2) Fluffing and pulping: various pulpsMixing and disintegrating the board by a pulper, soaking, then performing defibering and pulping, and controlling the concentration of the pulp grinding to be 4.0-5.0%; the beating degree is controlled as follows: 18-20 0 SR, wet weight is more than or equal to 7g. After the defibering and pulping are finished, placing the pulp into a pulping tank;
3) Slurry preparation: preparing ground wood pulp in a pulp preparing pool according to a certain proportion, mixing, adding a wet strength agent, and diluting to the concentration of 0.8-1.0%; wet strength agent addition amount: 3.0 percent
4) Manufacturing paper: diluting the prepared slurry to 0.2-0.4% concentration, pumping to a front papermaking pool, forming by a fan pump, squeezing and drying;
5) Surface sizing: the paper sheet dried in the previous process enters a surface sizing device for surface sizing, the surface sizing liquid completely immerses the paper sheet, and the surface sizing liquid is uniformly coated on the paper sheet through uniform extrusion of the surface sizing roller; the surface sizing solution is starch solution, and the concentration of the surface sizing solution is 2-4%.
6) The quantitative ratio of the paper is controlled to be 60-63g/m 2 。
7) Drying, coiling, cutting and packaging.
The detection results are shown in the attached table.
Comparative example 4
1) Proportioning the slurry: adding 75% of softwood pulp and 35% of hardwood pulp in percentage by mass into a pulper for pulping;
2) Fluffing and pulping: mixing and pulping various pulp boards by a pulper, soaking, then performing defibering and pulping, and controlling the pulp grinding concentration to be 5.5-6.0%; the beating degree is controlled as follows: 16-18 DEG SR, and the wet weight is more than or equal to 6.5g. After the defibering and pulping are finished, placing the pulp into a pulping tank;
3) Slurry preparation: preparing ground wood pulp in a pulp preparing pool according to a certain proportion, mixing, adding a wet strength agent, and diluting to the concentration of 0.8-1.0%; wet strength agent addition amount: 2.0 percent.
4) Manufacturing paper: diluting the prepared slurry to 0.1-0.3%, pumping the slurry to a front pool, forming the slurry on a net by a fan pump, squeezing and drying;
5) Surface sizing: the paper sheet dried in the previous process enters a surface sizing device for surface sizing, the surface sizing liquid completely immerses the paper sheet, and the surface sizing liquid is uniformly coated on the paper sheet through uniform extrusion of the surface sizing roller; the surface sizing solution is PVA solution, and the concentration of the surface sizing solution is 2-3%.
6) The quantitative rate of paper is controlled to be 55-58g/m 2 。
7) Drying, coiling, cutting and packaging.
Comparative example 5
1) Proportioning the slurry: adding 55 mass percent of softwood pulp and 45 mass percent of bamboo pulp into a pulper for pulping;
2) Fluffing and pulping: mixing and pulping various pulp boards by a pulper, soaking, then performing defibering and pulping, and controlling the pulp grinding concentration to be 5.5-6.0%; the beating degree is controlled as follows: 21-23 DEG SR, and the wet weight is more than or equal to 6g. After the defibering and pulping are finished, placing the pulp into a pulping tank;
3) Slurry preparation: preparing ground wood pulp in a pulp preparing pool according to a certain proportion, mixing, adding a wet strength agent, and diluting to the concentration of 0.8-1.0%; wet strength agent addition amount: 2.0 percent
4) Manufacturing paper: diluting the prepared slurry to 0.1-0.3% concentration, pumping to a front papermaking pool, forming by a fan pump, squeezing and drying;
5) Surface sizing: feeding the paper sheet dried in the previous process into a surface sizing device for surface sizing, completely immersing the paper sheet by surface sizing liquid, and uniformly coating the surface sizing liquid on the paper sheet through uniform extrusion of the surface sizing roller; the surface sizing solution is hydrophilic acrylic latex solution, and the concentration of the surface sizing solution is 4-5%.
6) The quantitative control of paper is 62-65g/m 2 。
7) Drying, coiling, cutting and packaging.
Comparative example 6
1) Proportioning the slurry: adding 95% of softwood pulp and 5% of bamboo pulp in percentage by mass into a pulper for pulping;
2) Fluffing and pulping: mixing and pulping various pulp boards by a pulper, soaking, then performing defibering and pulping, and controlling the pulp grinding concentration to be 5.5-6.0%; the beating degree is controlled as follows: 15-18 DEG SR, and the wet weight is more than or equal to 7g. After defibering and pulping are finished, placing the pulp into a pulping pool;
3) Slurry preparation: preparing ground wood pulp in a pulp preparing pool according to a certain proportion, mixing, adding a wet strength agent, and diluting to a concentration of 0.8-1.0%; wet strength agent addition amount: 2.0 percent
4) Manufacturing paper: diluting the prepared slurry to 0.1-0.3%, pumping the slurry to a front pool, forming the slurry on a net by a fan pump, squeezing and drying;
5) Surface sizing: the paper sheet dried in the previous process enters a surface sizing device for surface sizing, the surface sizing liquid completely immerses the paper sheet, and the surface sizing liquid is uniformly coated on the paper sheet through uniform extrusion of the surface sizing roller; the surface sizing liquid is hydrophilic acrylic latex solution, and the concentration of the surface sizing liquid is 4-5%.
6) The quantitative rate of paper is controlled to be 55-58g/m 2 。
7) Drying, coiling, cutting and packaging.
The detection results are shown in the attached table.
The specific quality indexes of the oleophobic anti-seepage high-permeability filter stick forming paper produced by the embodiments of the invention are as follows:
Figure BDA0003512646190000081
the previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention, including any reference to the above-mentioned embodiments. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. The magnetic material filter paper is characterized in that 65-75% of softwood pulp and 25-35% of bamboo pulp are selected as pulp according to mass percentage, and the beating degree is controlled as follows: 18-25 ° SR; and is being equipped withAdding wet strength agent with the weight of 1.0-6.0% of the pulp into the pulp; after the paper making is finished, the paper surface is dried and sized, and the dosage of the surface sizing solution is 10-60kg/t paper; quantification of the magnetic material filter paper: 55-65g/m 2 Air permeability: 80-1000CU, longitudinal tensile Strength: not less than 3.0kN/m, transverse tensile strength: not less than 1.0kN/m 2 Longitudinal wet strength: not less than 1.0kN/m 2 Transverse wet strength: more than or equal to 0.4kN/m, water absorption: not less than 150g/m 2 The pore diameter: 2-5 μm;
the production process of the filter paper comprises the following steps:
1) Proportioning the slurry: 65-75% of softwood pulp and 25-35% of bamboo pulp are selected as pulp according to the mass percentage;
2) Defibering and pulping: mixing and pulping various pulp boards by a pulper, soaking, then performing defibering and pulping, and controlling the pulp grinding concentration to be 4.5-6.0%; the beating degree is controlled as follows: SR at 18-25 degrees, and wet weight is more than or equal to 6g;
3) Slurry preparation: preparing ground wood pulp in a pulp preparing pool according to a certain proportion, mixing, adding a wet strength agent, and diluting to the concentration of 0.8-1.0%; wet strength agent addition amount: 2.0 to 6.0 percent;
4) Manufacturing paper: diluting the prepared slurry to 0.1-0.5% concentration, pumping to a front papermaking pool, forming by a fan pump, squeezing and drying;
5) Surface sizing: feeding the paper sheet dried in the previous process into a surface sizing device for surface sizing; the concentration of the surface sizing solution is 2.0-6.0%, and the dosage is 10-60kg/t paper;
6) The quantitative control of paper is 55-65g/m 2 ；
7) Drying, coiling, cutting and packaging.
2. The magnetic filter paper as claimed in claim 1, wherein the wet strength agent is one or both of PAE and PPE.
3. A magnetic material filter paper as claimed in claim 2, wherein the wet strength agent is added in an amount of 3.0% to 4.0%.
4. The magnetic material filter paper as claimed in claim 1, wherein the surface sizing solution is a PVA solution, a starch solution or a hydrophilic acrylate solution.
5. The magnetic material filter paper according to claim 4, wherein the PVA solution has a mass percent concentration of 1-4% and is used in an amount of 10-50kg/t paper; the mass percentage concentration of the starch solution is 1-5%, and the dosage is 10-50kg/t paper; the mass percentage concentration of the acrylate solution is 1-6%, and the dosage is 10-60kg/t paper.
6. The magnetic material filter paper as claimed in claim 5, wherein the PVA solution has a concentration of 1.5-3.0% by mass; the mass percentage concentration of the starch solution is 2.0-4.0%; the mass percentage concentration of the hydrophilic acrylate solution is 3.0-5.0%.
7. A magnetic material filter paper as claimed in claim 4, 5 or 6, wherein the starch is one or more of native starch and modified starch.
8. A process for the production of a magnetic filter paper according to any of claims 1 to 7, characterized in that it comprises the following steps:
1) Proportioning the slurry: selecting 65-75% of softwood pulp and 25-35% of bamboo pulp according to mass percentage;
2) Fluffing and pulping: mixing and pulping various pulp plates by a pulper, soaking, then performing defibering and pulping, and controlling the pulp grinding concentration to be 4.5-6.0%; the beating degree is controlled as follows: SR at 18-25 degrees, and wet weight is more than or equal to 6g;
3) Slurry preparation: preparing ground wood pulp in a pulp preparing pool according to a certain proportion, mixing, adding a wet strength agent, and diluting to the concentration of 0.8-1.0%; wet strength agent addition amount: 2.0 to 6.0 percent;
4) Manufacturing paper: diluting the prepared slurry to 0.1-0.5%, pumping the slurry to a front pool, forming the slurry on a net by a fan pump, squeezing and drying;
5) Surface sizing: feeding the paper sheet dried in the previous path into a surface sizing device for surface sizing; the concentration of the surface sizing solution is 2.0-6.0%, and the dosage is 10-60kg/t paper;
6) The quantitative control of paper is 55-65g/m 2 ；
7) Drying, coiling, cutting and packaging.
9. Use of a magnetic material filter paper according to any one of claims 1 to 7 for filtering slurry powder in the production of permanent magnetic ferrites.
CN202210156011.3A 2022-02-21 2022-02-21 Magnetic material filter paper and production process and application thereof Active CN114575194B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210156011.3A CN114575194B (en) 2022-02-21 2022-02-21 Magnetic material filter paper and production process and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210156011.3A CN114575194B (en) 2022-02-21 2022-02-21 Magnetic material filter paper and production process and application thereof

Publications (2)

Publication Number Publication Date
CN114575194A CN114575194A (en) 2022-06-03
CN114575194B true CN114575194B (en) 2022-12-16

Family

ID=81773218

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210156011.3A Active CN114575194B (en) 2022-02-21 2022-02-21 Magnetic material filter paper and production process and application thereof

Country Status (1)

Country Link
CN (1) CN114575194B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116446222B (en) * 2023-05-08 2024-04-09 浙江凯恩新材料有限公司 Three-layer-structured high-internal-bonding-strength heat-seal tea filter paper, preparation method and application

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1286607A (en) * 1997-12-15 2001-03-07 宝洁公司 Absorbent articles having liquid shrinkable breathable backsheets
JP5910048B2 (en) * 2011-12-06 2016-04-27 富士ゼロックス株式会社 Paper and paper manufacturing method
CN103243611B (en) * 2013-05-09 2016-06-08 杭州特种纸业有限公司 Wrinkle filter paper and manufacture craft thereof
CN105155329B (en) * 2015-07-22 2017-07-11 浙江惠同新材料股份有限公司 With Japanese paper adhesive tape base paper and its production method
CN105755904A (en) * 2016-04-26 2016-07-13 杭州特种纸业有限公司 Nano qualitative filter paper and preparing method thereof
CN108179654A (en) * 2018-01-04 2018-06-19 浙江凯恩特种纸业有限公司 A kind of common filter stick shaping paper of oleophobic property antiseepage
CN109989296B (en) * 2019-04-01 2020-09-15 华南理工大学 Multilayer filter paper and preparation method thereof
CN110924231A (en) * 2019-11-29 2020-03-27 浙江凯恩特种纸业有限公司 Preparation process of non-heat-sealing type tea filter paper

Also Published As

Publication number Publication date
CN114575194A (en) 2022-06-03

Similar Documents

Publication Publication Date Title
CN102656316B (en) Cellulose nanofibers
US2962415A (en) Specialty papers containing a resin dispersant and retention aid and process for producing the same
CN104911945B (en) High-precision diesel oil composite filter paper, and production method and application thereof
CN109440533B (en) Method for producing high-transparency paper bag paper by using bamboo pulp
CN114575194B (en) Magnetic material filter paper and production process and application thereof
CN108867149A (en) A kind of preparation method using cylinder mould machine Compound Machining blotting paper
CN106012658B (en) Breathable medical adhesive tape base material and its manufacture method
CN107558291A (en) Semi-transparent film support non-woven fabrics
CN104631198A (en) Diaphragm paper for mercury-free alkaline zinc-manganese dioxide battery and preparation method thereof
CN104631196A (en) Single-layer superlow-gram-weight liner cardboard paper production method
CN103015258A (en) Manufacturing process for macerative masking tape
CN104942960B (en) A kind of fire-retardant plant multifilament is modified the production method of plate
CN110373945A (en) A kind of ML kraft inner paper and its preparation process
CN102031723A (en) Preparation method of high-performance wear-resistant paper
CN109972454A (en) A kind of FB(is explosion-proof) paper tube base paper and its preparation process
CN104213469A (en) Micro scalable printing type decorative base paper and preparation method thereof
CN115045138A (en) Production process based on non-woven fabric composite paper
CN110924231A (en) Preparation process of non-heat-sealing type tea filter paper
CN107190559A (en) Plant oil filter paper and its preparation method and application
CN109024054A (en) High-air-permeability filter stick shaping paper and its production method
CN106049183B (en) A kind of flat bed filter paper and preparation method thereof
CN105064124B (en) Apply paperboard and its production method
CN110258155B (en) TF series paper tube base paper and preparation process thereof
CN110924230A (en) Non-heat-sealing type tea filter paper and preparation method thereof
CN110552235A (en) Production method of black facial mask 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