CN106592322B - A kind of preparation method of diaphragm paper of alkaline cell - Google Patents
A kind of preparation method of diaphragm paper of alkaline cell Download PDFInfo
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- CN106592322B CN106592322B CN201610882706.4A CN201610882706A CN106592322B CN 106592322 B CN106592322 B CN 106592322B CN 201610882706 A CN201610882706 A CN 201610882706A CN 106592322 B CN106592322 B CN 106592322B
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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
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/12—Organic non-cellulose fibres from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/14—Polyalkenes, e.g. polystyrene polyethylene
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
-
- 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
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/005—Mechanical treatment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/44—Fibrous material
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The present invention relates to a kind of preparation methods of diaphragm paper of alkaline cell, and steps are as follows: (1) weighing polypropylene fibre and ES fiber；(2) take polypropylene fibre to be put into standard fibre to discongest in device, water is added, then discongests；(3) take ES fiber to be put into the standard fibre equipped with polypropylene fibre slurry to discongest in device, water is added, then proceedes to discongest, obtains pulp suspension；(4) pulp suspension is moved into mud pit, added water, stir 10~30min, uniformly rear as composite fibre slurry to be mixed；By step (4) in composite fibre slurry carry out wet web of manufacturing paper with pulp to obtain, wet web, finally by being dried, obtains dry paper web after press dewatering is handled；(6) dry paper web is subjected to hot-pressing processing to get diaphragm paper of alkaline cell.This method is mixed with diaphragm paper of alkaline cell using polypropylene fibre and low-melting fiber, and the diaphragm paper of alkaline cell being prepared has the performances such as high intensity, high porosity, high alkali absorbing rate.
Description
Technical field
The invention belongs to extraordinary paper conversion and manufacturing technology field, especially a kind of preparation side of diaphragm paper of alkaline cell
Method.
Background technique
With getting worse for environmental problem, the research and development of clean type automobile (such as fuel cell car and electric car) are
Through being concerned.In clean type automobile, the hybrid vehicle of rechargeable type may be considered most promising.But
The battery of mixed motivity type automobile must have the features such as excellent output power, high capacity, long service life.Alkaline battery is excellent with its
Good performance and one of the power supply for becoming mixed motivity type automobile.Therefore, high performance alkaline battery is increasingly taken seriously.
Currently, common alkaline battery is mostly anode with manganese dioxide, zinc is cathode, and potassium hydroxide is electrolyte, positive and negative
There is the diaphragm material for playing buffer action between electrode, which is known as battery separator paper.Battery separator paper is the thinnest in battery
Weak part, between the positive and negative electrode of battery, effect is to allow ion to penetrate, referred to as the heart of battery electronic isolation
Dirty, the superiority and inferiority of physical property directly affects the use of battery, shelf characteric and service life.Therefore, conventional alkaline electro
Pond diaphragm paper need to have following characteristics: (1) good isolation performance separates the positive and negative electrode of battery, prevents positive and negative
The active material of pole directly contacts, and causes the internal short-circuit of battery；(2) good ion permeability, using certain aperture as
Ion channel, it is desirable that diaphragm paper shows high resistance to electronics, and is in low resistance to ion, i.e. guarantee Ion transfer is unobstructed；(3)
Good electrolyte absorbent properties and water retainability；(4) good chemical stability, alkali resistance especially in the electrolytic solution,
To ensure the stability of diaphragm paper under alkaline condition；(5) there is certain mechanical performance and toughness, to meet quantity-produced
It is required that；(6) Applicable temperature of battery is generally -20 DEG C~80 DEG C, it is desirable that diaphragm paper is stablized in use temperature range inside dimension, prevents
Only internal short-circuit of battery is caused because of deformation.
The big basic function of the two of diaphragm paper of alkaline cell is isolation performance and ionic conducting property." dendrite " phenomenon is generally deposited
It is in alkaline battery, and this " dendrite " readily penetrates through the biggish diaphragm paper in aperture, so that two interelectrode active matters
Upright contact, so as to cause internal short-circuit of battery, seriously affects the service life, battery capacity and cell safety of battery
Etc. performances.Internal short-circuit of battery caused by " dendrite ", diaphragm paper of alkaline cell should have lesser aperture, i.e. diaphragm in order to prevent
Sheet hole diameter is smaller, and isolation performance is better；Porosity is higher, and liquid storage performance is better, and ionic conducting property is also more preferable.Therefore, often
The diaphragm paper of alkaline cell of rule generallys use the good superfine synthesized fiber of chemical stability and is made, make its have low aperture and
The characteristics of high porosity.Polypropylene fibre diaphragm is high with porosity, aperture is small, chemical purity is high, objectionable impurities is few, Yi Jifei
Often good resistance to acid and alkali, inoxidizability and the small feature of resistance.But fiber associative key, fiber are not present between polypropylene fibre
Only mutual weave in, thus binding force is not present between diaphragm paper fiber, cause diaphragm paper bond strength extremely low.
It is disclosed in Chinese patent 02147638.1 " a kind of manufacturing method of diaphragm paper of alkaline cell ", this method utilizes roller
It presses compound method that a kind of nylon non-thermoplastic cloth and polypropylene nonwoven cloth composite membrane is made, is used as alkaline battery separator.But
This composite diaphragm is not effectively bonded together, and stability is limited.
Other data outside non-patent show that the techniques such as meltblown, dry method, wet process are used equally for production diaphragm paper.Melt-blown
The diaphragm paper fibre diameter of method preparation is small, but intensity difference；The diaphragm paper inferior quality of dry production；Using the alkalinity of wet production
Battery separator paper has the characteristics that tightness is high, evenness is good, at low cost.Therefore, the present invention with wet processing manufacture alkaline battery every
Film paper.
By retrieval, patent publication us relevant to present patent application is not yet found.
Summary of the invention
It is an object of the invention to provide a kind of preparation side of diaphragm paper of alkaline cell in place of overcome the deficiencies in the prior art
Method, this method use polypropylene fibre and ES fiber for raw material, prepare the preferable page of evenness using wet therapy forming process, then
Diaphragm paper of alkaline cell is prepared using the method for hot-pressing processing, the diaphragm paper of alkaline cell being prepared has high-intensitive, Gao Kong
The performances such as gap rate, high alkali absorbing rate.
The present invention solves its technical problem and adopts the following technical solutions to achieve:
A kind of preparation method of diaphragm paper of alkaline cell, steps are as follows:
(1) weigh polypropylene fibre and ES fiber, wherein polypropylene fibre: ES fiber quality portion rate is 3~8:1~6；
(2) take polypropylene fibre to be put into standard fibre to discongest in device, addition water, the mass ratio of polypropylene fibre and water is 1:
200~300,15000~20000r is then discongested, flocculence polypropylene fibre is made to scatter, to form polypropylene fibre slurry
Material；
(3) take ES fiber to be put into the standard fibre equipped with polypropylene fibre slurry to discongest in device, water is added, makes composite fibre
Mass concentration in water is 0.5%~1%, then proceedes to discongest 20000~25000r, fiber to be mixed is completely dispersed no wadding
Stop discongesting after accumulation, obtains pulp suspension；
(4) pulp suspension is moved into mud pit, adding water and being made into mass concentration is 0.2%~0.5%, stirring 10~
30min, uniformly rear as composite fibre slurry to be mixed；
(5) the composite fibre slurry in step (4) is subjected to wet web of manufacturing paper with pulp to obtain, wet web after press dewatering is handled,
Finally by being dried, dry paper web is obtained；The actual conditions of squeezing are as follows: 1~10min of positive pressure, 1~10min of back-pressure；It is dry
Temperature is 80 DEG C~98 DEG C, obtains dry paper web；
(6) dry paper web being subjected to hot-pressing processing, hot pressing temperature and hot-pressing strength are respectively set as 100~160 DEG C, 0.1~
1.2MPa is to get diaphragm paper of alkaline cell.
Moreover, the step (4) in plus water be made into mass concentration be 0.2%~0.5%, then, add different types of
Chemical assistant, then be stirred.
Moreover, the additional amount of the chemical assistant is 0.5~1.5% relative to bone dry fiber stock quality.
Moreover, the chemical assistant is polyacrylamide, polyethylene glycol oxide or carboxymethyl cellulose.
Moreover, the length of the polypropylene fibre is 1~6mm, fiber width is 2~4 μm；The length of the ES fiber is
1~4mm, fiber width are 10~16 μm.
The advantages of present invention obtains and good effect are:
1, this method is mixed with diaphragm paper of alkaline cell using polypropylene fibre and low-melting fiber, and wherein low melting point is fine
Dimension has selected polyethylene/polypropylene bicomponent sheath cored structure (Ethylene-Propylene Side By Side, abbreviation ES) fine
Dimension, the fusing point using the skin of ES fiber, sandwich layer is different, i.e., under certain temperature, the cortex of ES fiber melts, and sandwich layer is non-fusible,
The cortex of different fibers can be bonded together organically, to reach the strengthened purpose of diaphragm paper, the alkali being prepared
Property battery separator paper there are the performances such as high intensity, high porosity, high alkali absorbing rate.
2, the slurry of this method is mixed in a certain ratio by polypropylene fibre and ES fiber.The application of polypropylene fibre is advantageous
In the compactness and alkali resistance that improve alkaline battery separator, ultra-fine structure is conducive to ensure that battery separator paper aperture and chemistry are steady
It is qualitative；When preparing diaphragm paper using wet forming, since polypropylene fibre density is small, Yi Xuju, paper formation is poor, using ES fibre
Dimension mix with polypropylene fibre when manufacturing paper with pulp diaphragm paper, on the one hand, ES fiber rigidity is bigger than polypropylene fibre, if by ES fiber with gather
For tacryl with copying, rigid ES fiber can hinder polypropylene fibre wadding poly-, can improve paper formation；On the other hand, exist
During hot-pressing processing page, since ES fiber is under certain temperature and pressure, fiber skin fusing makes to stick between fiber
It ties together, the intensity of diaphragm paper gets a promotion, and two kinds of materials are provided with good corrosion resistance.
3, this method can prepare the diaphragm paper that tightness is high, evenness is good using wet therapy forming process, not only increase page
Intensity, also reduce the aperture of diaphragm paper, enhance battery separator paper and resist ZnO " dendrite " ability for penetrating, and the work
Skill is simple, convenient, and cost is relatively low.
Specific embodiment
Below with reference to embodiment, the present invention is further described；Following embodiments be it is illustrative, be not restrictive,
It cannot be limited the scope of protection of the present invention with following embodiments.
Raw material used in the present invention is unless otherwise specified conventional commercial product；Used in the present invention
Method is unless otherwise specified the conventional method of this field.
Embodiment 1
A kind of preparation method of diaphragm paper of alkaline cell, steps are as follows:
(1) taking mass fraction is 80 parts of polypropylene fibre, is put into standard fibre and discongests in device, and suitable quantity of water is added, makes to gather
The mass ratio of tacryl and water is 1:300；Then 20000r is discongested, flocculence polypropylene fibre is made to scatter, to be formed
Polypropylene fibre slurry；
(2) taking parts by weight is that 20 parts of ES fiber is put into and has dispersed to reunite the standard fibre of tacryl and discongest in device,
Suitable quantity of water is added, makes the mass concentration 0.5% of composite fibre in water, then proceedes to discongest 20000r, fiber to be mixed is complete
Full dispersion obtains pulp suspension without stopping discongesting after wadding accumulation；
(3) pulp suspension is transferred to mud pit, adding water and being made into mass concentration is 0.3%, and it is (opposite to be added 0.5%
In over dry stock quality) chemical assistant PEO, stir 10min, it is to be mixed uniformly after be composite fibre slurry；
(4) the composite fibre slurry in step (3) being subjected to wet web of manufacturing paper with pulp to obtain, wet web is handled by press dewatering,
Finally by being dried, dry paper web is obtained；Squeeze actual conditions are as follows: positive pressure 5min, back-pressure 2min；Drying temperature is 94
℃；
(5) paper web after drying is subjected to hot-pressing processing, hot pressing temperature and hot-pressing strength be respectively set as 135 DEG C and
0.3MPa finally obtains diaphragm paper of alkaline cell.
Testing result:
The diaphragm paper of alkaline cell prepared under the above conditions obtains the quantification of 50.12g/m of battery separator paper2,
Tensile index is 22.93Nm/g, and alkali absorbing rate 276.7%, resistance to alkali loss is 0.52%, and maximum diameter of hole is 37.92 μm, average
Aperture is 18.40 μm, air permeability 119.94L/m2S, porosity 47.7%.
Embodiment 2
A kind of preparation method of diaphragm paper of alkaline cell, steps are as follows:
(1) taking mass fraction is 70 parts of polypropylene fibre, is put into standard fibre and discongests in device, and suitable quantity of water is added, makes to gather
The mass ratio of tacryl and water is 1:300；Then 20000r is discongested, flocculence polypropylene fibre is made to scatter, to be formed
Polypropylene fibre slurry；
(2) taking parts by weight is that 30 parts of ES fiber is put into and has dispersed to reunite the standard fibre of tacryl and discongest in device,
Suitable quantity of water is added, makes the mass concentration 0.5% of composite fibre in water, then proceedes to discongest 20000r, fiber to be mixed is complete
Full dispersion obtains pulp suspension without stopping discongesting after wadding accumulation；
(3) pulp suspension is transferred to mud pit, adding water and being made into concentration is 0.3%, 15min is stirred, wait stir
It is composite fibre slurry after mixing uniformly；
(4) the composite fibre slurry in step (3) being subjected to wet web of manufacturing paper with pulp to obtain, wet web is handled by press dewatering,
Finally by being dried, dry paper web is obtained.Squeeze actual conditions are as follows: positive pressure 5min, back-pressure 2min；Drying temperature is 94
℃；
(5) dry paper web is subjected to hot-pressing processing, hot pressing temperature and hot-pressing strength are respectively set as 150 DEG C, 0.5MPa, most
After obtain diaphragm paper of alkaline cell.
Testing result:
The diaphragm paper of alkaline cell prepared under the above conditions obtains the quantification of 50.00g/m of battery separator paper2,
Tensile index is 38.81Nm/g, and alkali absorbing rate 248.1%, resistance to alkali loss is 0.82%, and maximum diameter of hole is 35.66 μm, average
Aperture is 15.23 μm, air permeability 49.83L/m2S, porosity 38.6%.
Embodiment 3
A kind of preparation method of diaphragm paper of alkaline cell, steps are as follows:
(1) taking mass fraction is 65 parts of polypropylene fibre, is put into standard fibre and discongests in device, and suitable quantity of water is added, makes to gather
The mass ratio of tacryl and water is 1:200；Then 15000r is discongested, flocculence polypropylene fibre is made to scatter, to be formed
Polypropylene fibre slurry；
(2) taking parts by weight is that 35 parts of ES fiber is put into and has dispersed to reunite the standard fibre of tacryl and discongest in device,
Suitable quantity of water is added, makes the mass concentration 0.7% of composite fibre in water, then proceedes to discongest 23000r, fiber to be mixed is complete
Full dispersion obtains pulp suspension without stopping discongesting after wadding accumulation；
(3) pulp suspension is transferred to mud pit, adding water and being made into mass concentration is 0.3%, and it is (opposite to be added 0.5%
In over dry stock quality) chemical assistant CMC, stir 10min, it is to be mixed uniformly after be composite fibre slurry；
(4) the composite fibre slurry in step (3) being subjected to wet web of manufacturing paper with pulp to obtain, wet web is handled by press dewatering,
Finally by being dried, dry paper web is obtained.Squeeze actual conditions are as follows: positive pressure 10min, back-pressure 10min；Drying temperature is 80
℃；
(5) dry paper web is subjected to hot-pressing processing, hot pressing temperature and hot-pressing strength are respectively set as 100 DEG C, 1MPa, finally
Obtain diaphragm paper of alkaline cell.
Testing result:
The diaphragm paper of alkaline cell prepared under the above conditions obtains the quantification of 50.00g/m of battery separator paper2,
Tensile index is 29.29Nm/g, and alkali absorbing rate 306.4%, resistance to alkali loss is 0.63%, and maximum diameter of hole is 45.65 μm, average
Aperture is 19 μm, air permeability 190.83L/m2S, porosity 48.7%.
Embodiment 4
A kind of preparation method of diaphragm paper of alkaline cell, steps are as follows:
(1) taking mass fraction is 30 parts of polypropylene fibre, is put into standard fibre and discongests in device, and suitable quantity of water is added, makes to gather
The mass ratio of tacryl and water is 1:250；Then 18000r is discongested, flocculence polypropylene fibre is made to scatter, to be formed
Polypropylene fibre slurry；
(2) taking parts by weight is that 10 parts of ES fiber is put into and has dispersed to reunite the standard fibre of tacryl and discongest in device,
Suitable quantity of water is added, makes the mass concentration 1% of composite fibre in water, then proceedes to discongest 25000r, fiber to be mixed is complete
Dispersion obtains pulp suspension without stopping discongesting after wadding accumulation；
(3) pulp suspension is transferred to mud pit, adding water and being made into mass concentration is 0.5%, addition 1% (relative to
Over dry stock quality) chemical assistant PAM, stir 30min, it is to be mixed uniformly after be composite fibre slurry；
(4) the composite fibre slurry in step (3) being subjected to wet web of manufacturing paper with pulp to obtain, wet web is handled by press dewatering,
Finally by being dried, dry paper web is obtained.Squeeze actual conditions are as follows: positive pressure 1min, back-pressure 1min；Drying temperature is 90
℃；
(5) dry paper web is subjected to hot-pressing processing, hot pressing temperature and hot-pressing strength are respectively set as 160 DEG C, 0.9MPa, most
After obtain diaphragm paper of alkaline cell.
Testing result:
The diaphragm paper of alkaline cell prepared under the above conditions obtains the quantification of 50.14g/m of battery separator paper2,
Tensile index is 38.66Nm/g, and alkali absorbing rate 287.3%, resistance to alkali loss is 0.83%, and maximum diameter of hole is 39.21 μm, average
Aperture is 15.50 μm, air permeability 176.67L/m2S, porosity 46.4%.
Embodiment 5
A kind of preparation method of diaphragm paper of alkaline cell, steps are as follows:
(1) taking mass fraction is 40 parts of polypropylene fibre, is put into standard fibre and discongests in device, and suitable quantity of water is added, makes to gather
The mass ratio of tacryl and water is 1:300；Then 20000r is discongested, flocculence polypropylene fibre is made to scatter, to be formed
Polypropylene fibre slurry；
(2) taking parts by weight is that 60 parts of ES fiber is put into and has dispersed to reunite the standard fibre of tacryl and discongest in device,
Suitable quantity of water is added, makes the mass concentration 0.5% of composite fibre in water, then proceedes to discongest 20000r, fiber to be mixed is complete
Full dispersion obtains pulp suspension without stopping discongesting after wadding accumulation；
(3) pulp suspension is transferred to mud pit, adding water and being made into mass concentration is 0.3%, and it is (opposite to be added 1.5%
In over dry stock quality) chemical assistant PEO, stir 15min, it is to be mixed uniformly after be composite fibre slurry；
(4) the composite fibre slurry in step (3) being subjected to wet web of manufacturing paper with pulp to obtain, wet web is handled by press dewatering,
Finally by being dried, dry paper web is obtained.Squeeze actual conditions are as follows: positive pressure 5min, back-pressure 2min；Drying temperature is 94
℃；
(5) dry paper web is subjected to hot-pressing processing, hot pressing temperature and hot-pressing strength are respectively set as 135 DEG C, 0.5MPa, most
After obtain diaphragm paper of alkaline cell.
Testing result:
The diaphragm paper of alkaline cell prepared under the above conditions obtains the quantification of 50.05g/m of battery separator paper2,
Tensile index is 44.01Nm/g, and alkali absorbing rate 357.4%, resistance to alkali loss is 0.78%, and maximum diameter of hole is 52.01 μm, average
Aperture is 16.15 μm, air permeability 195.61L/m2S, porosity 56.1%.
The foregoing describe basic principles and main features of the invention.The present invention is not limited to the above embodiments, above-mentioned
Embodiment description only illustrates basic principle of the invention, under the premise of not departing from spirit and scope of the invention, the present invention
It will will have various changes and improvements, these changes and improvements can all be fallen into scope of the claimed invention.
Claims (1)
1. a kind of preparation method of diaphragm paper of alkaline cell, it is characterised in that: steps are as follows:
(1) weigh polypropylene fibre and ES fiber, wherein polypropylene fibre: ES fiber quality portion rate is 3~8:1~6；
(2) take polypropylene fibre to be put into standard fibre to discongest in device, be added water, the mass ratio of polypropylene fibre and water be 1:200~
300,15000~20000r is then discongested, flocculence polypropylene fibre is made to scatter, to form polypropylene fibre slurry；
(3) take ES fiber to be put into the standard fibre equipped with polypropylene fibre slurry to discongest in device, water is added, makes composite fibre in water
In mass concentration be 0.5%~1%, then proceed to discongest 20000~25000r, fiber to be mixed is completely dispersed without wadding accumulation
Stop discongesting afterwards, obtains pulp suspension；
(4) pulp suspension is moved into mud pit, adding water and being made into mass concentration is 0.2%~0.5%, 10~30min is stirred,
Uniformly rear as composite fibre slurry to be mixed；
By step (4) in composite fibre slurry carry out wet web of manufacturing paper with pulp to obtain, wet web is after press dewatering is handled, finally
By being dried, dry paper web is obtained；The actual conditions of squeezing are as follows: 1~10min of positive pressure, 1~10min of back-pressure；Drying temperature
It is 80 DEG C~98 DEG C, obtains dry paper web；
(6) dry paper web being subjected to hot-pressing processing, hot pressing temperature and hot-pressing strength are respectively set as 100~160 DEG C, 0.1~
1.2MPa is to get diaphragm paper of alkaline cell；
The fibre length of the polypropylene fibre is 1~6mm, and fiber width is 2~4 μm；The fibre length of the ES fiber is 1
~4mm, fiber width are 10~16 μm；
The step (4) in plus water be made into mass concentration be 0.2%~0.5%, then, add different types of chemical assistant,
It is stirred again；
The chemical assistant is polyacrylamide, polyethylene glycol oxide or carboxymethyl cellulose；
The additional amount of the chemical assistant is 0.5~1.5% relative to bone dry fiber stock quality.
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| CN113430865B (en) * | 2021-06-11 | 2022-08-16 | 华南理工大学 | High-strength high-conductivity synthetic fiber/graphene composite paper and preparation method thereof |
| CN113502684B (en) * | 2021-06-21 | 2022-10-14 | 浙江鹏辰造纸研究所有限公司 | Auxiliary diaphragm for zinc-silver battery and preparation method thereof |
| CN114892443A (en) * | 2022-05-05 | 2022-08-12 | 华南理工大学 | High-strength high-permeability interlaminar toughened synthetic fiber paper base material and preparation method and application thereof |
| CN115838995A (en) * | 2022-11-25 | 2023-03-24 | 江苏盛纺纳米材料科技股份有限公司 | Flexible non-woven material and production process thereof |
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| CN101581054B (en) * | 2009-05-27 | 2012-02-15 | 安徽万邦高森造纸有限公司 | Paper pulp for gluing alkaline battery diaphragm paper and preparation process for preparing diaphragm paper by applying paper pulp |
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