CN107217530A - A kind of inclined-wire form method prepares the industrial method of polyimide fiber insulating paper - Google Patents
A kind of inclined-wire form method prepares the industrial method of polyimide fiber insulating paper Download PDFInfo
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- CN107217530A CN107217530A CN201710651799.4A CN201710651799A CN107217530A CN 107217530 A CN107217530 A CN 107217530A CN 201710651799 A CN201710651799 A CN 201710651799A CN 107217530 A CN107217530 A CN 107217530A
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- pulp
- chopped strand
- polyimides
- wire form
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Classifications
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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
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/26—Polyamides; Polyimides
-
- 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
- D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
-
- 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
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
-
- 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
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
- D21H15/10—Composite fibres
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Insulating Materials (AREA)
- Paper (AREA)
Abstract
The invention discloses the industrial method that a kind of inclined-wire form method prepares polyimide fiber insulating paper, comprise the following steps：Polyimides chopped strand is disperseed in scattered pond to obtain the suspension containing chopped strand, polyimides chopped strand suspension concentration is diluted with water to for the 6wt ‰ of 0.5wt ‰；Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniform mixing obtains pulp suspension；Described pulp is the one or more in Fanglun slurry cake, PSA fiber pulp or polyimides pulp；Pulp suspension is obtained into polyimides body paper using inclined-wire form technique；Body paper is carried out to obtain polyimides paper product after hot-pressing processing, cooling；The present invention uses inclined-wire form technique, realizes under low online concentration, the purpose that long fibre is manufactured paper with pulp.Any chemical addition agent is not used in preparation process, production cost can effectively be reduced, wastewater treatment difficulty and the pollution to environment are reduced, while avoiding influence of the addition to product dielectric properties because of chemical addition agent, the range of choice of high-temperature insulation composite industry is added.
Description
Technical field
The invention belongs to paper industry and material industry interleaving techniques field, and in particular to a kind of inclined-wire form method prepares poly-
The industrial method of imide fiber insulating paper.
Background technology
As an important kind of high-performance fiber, polyimide fiber has superior insulating properties, heat-resisting quantity
Can, good mechanical property, chemical resistance, thermo oxidative stability and radiation resistance etc..Using polyimide fiber as original
The high-temperature insulation composite prepared is expected, compared with traditional insulator materials, with more preferable high temperature resistant, high intensity, high insulation
Property etc., it is mainly used in electric insulation and honeycomb enhancing field, including generating equipment, power transmission and transforming equipment, motor, aviation boat
My god, track traffic, traction locomotive, electrical equipment, electronics, household electrical appliances, multiple rows such as communication and new energy (wind energy, solar energy and nuclear energy)
Industry.Aramid fiber and PSA fiber pulp, are the differentiated products of aramid fiber and PSA fiber, and it inherits the high-strength of respective pulp, Gao Mo, resistance to
The good excellent characteristic of warm nature, surface is in villiform, and fento is grown thickly, and filoplume enriches, with the wire-dividing broom purification similar with string
Phenomenon, therefore the compound resin formation hydrogen bond easily with allied fiber, water and amide-type so that the entanglement capability of pulp is strong, with
More preferably, the composite property of preparation is more preferably for evenness when other fibers prepare composite.Polyimides pulp is by polyamides
Imine fiber is prepared from, the various excellent characteristics for possessing polyimide fiber.
The preparation method of current polyimide insulative paper both at home and abroad, mostly laboratory lab scale, real industrialized production is not yet
Appear in the newspapers.In addition, the mode that the insulating composite material occurred in the market employs chemical addition agent mostly realizes composite wood
The shaping of material, and the use of additive can increase water process difficulty, pollute environment, and the dielectric properties of product can be produced not again
Profit influence.
The content of the invention
Composite is influenceed it is an object of the invention to overcome in polyimide fiber paper preparation process slurry concentration low
It is sub- that the problem of addition environmental pollution and product dielectric properties of shaping and chemical addition agent influence prepares polyamides there is provided one kind
The new method of amine fibrous insulation paper, using wet therapy forming process, is molded in slope screen former, realizes low online concentration, high
The purpose of product evenness.
To realize object above, the present invention is adopted the following technical scheme that：The present invention is that a kind of inclined-wire form method prepares polyamides
The industrial method of imine fiber insulating paper, is characterized in, comprises the following steps：
（1）Polyimides chopped strand is disperseed in scattered pond to obtain the suspension containing chopped strand, is diluted with water；Dilution
It is 3-10us/cm with the electrical conductivity of water；The length of the chopped strand is 3 mm -10mm；Mixing time when scattered is 0.5
h -5h；Polyimides chopped strand suspension concentration is diluted with water to for-the 6wt ‰ of 0.5 wt ‰；
（2）Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniform mixing is obtained
Pulp suspension；Described pulp is the one or more in Fanglun slurry cake, PSA fiber pulp or polyimides pulp；Mashing
Concentration be 0.1%-0.8%, beating time be 5 min -100min；Chopped strand accounts for pulp suspension mass percent
60%-95%；
（3）Pulp suspension is obtained into polyimides body paper using inclined-wire form technique；Slurry passes through oblique after being starched by pulp distributor cloth
Net former is molded, and the online concentration of inclined wire is 0.01 ‰ -3 ‰, jet-wire ratio：0.3-1；Go out the mass dryness fraction of oblique-net part page：≥
15%；Operating speed：10-80m/min；
（4）Body paper is carried out to obtain polyimides paper product after hot-pressing processing, cooling；The temperature of the hot pressing is 160 DEG C -360
DEG C, the line pressure of the hot pressing is 50 kg/cm2-500kg/cm2, the speed of the hot pressing is 3 m/min -80m/min.
Inclined-wire form method of the present invention is prepared in the industrial method of polyimide fiber insulating paper, and it is further excellent
The technical scheme or technical characteristic of choosing be：
1st, step（3）In, the online concentration of inclined wire is 0.2 ‰；It is dehydrated pressure difference and keeps constant；Paper is finally quantitative：20-90g/
m2；The classification of head box is flowing full formula head box or open headbox.
2nd, step（1）The length of the chopped strand is 5 mm -7mm；Mixing time when scattered is 1h -3h.
3rd, step（1）In be diluted with water to polyimide fiber suspension concentration for the -3wt ‰ of 2wt ‰.
4th, step（2）The one kind or several of the pulp in Fanglun slurry cake, PSA fiber pulp or polyimides pulp
Kind.
5th, step（2）The concentration of the mashing is 0.4%-0.6%, and beating time is 20min -50min.
6th, step（2）The incorporation time of middle chopped strand and pulp is 0.5 h -4h.
7th, step（2）Middle chopped strand accounts for pulp suspension mass percent for 70%-85%.
8th, step（4）The temperature of the hot pressing is 200 DEG C -260 DEG C, and the line pressure of the hot pressing is 150 kg/cm2-
350kg/cm2, the speed of the hot pressing is 20m/min -50m/min.
Compared with prior art, beneficial effects of the present invention are：
1st, the present invention is using polyimide fiber and pulp as raw material, using wet therapy forming process, and system is molded in slope screen former
For polyimide fiber insulating paper is gone out, intensity is then finally prepared through heat pressing process and the good polyimides of electrical property is fine
Tie up insulating paper.
2nd, low dense shaping is realized using inclined-wire form equipment in preparation process of the present invention, improves product institutional framework equal
Even property；
3rd, the present invention is not added with any auxiliary agent among processing, it is to avoid influence of the additive to product dielectric properties, reduces
The intractability of waste water and the pollution to environment.
4th, the range of choice of high-temperature insulation composite has been widened in the exploitation of product made from the inventive method, meets high
Requirement of the science and technology of speed development to high-temperature insulation material.
5th, one of raw material used herein is polyimide fiber, and fiber is longer, the connectionless key in surface, and product into
The concentration of slurry is extremely low during type, can be due to the too low influence material shaping of slurry concentration using traditional composite former
With product structure structural homogenity, therefore present invention employs oblique net paper machine shaping.Oblique net paper machine and common long mesh paper making machine are not
It is with part：The forming table of long mesh paper making machine is almost parallel with bottom rail, and oblique net paper machine is then angled in bottom rail, oblique net paper machine
The characteristics of compatible fourdrinier wire, cylinder, it is particularly suitable for long fibre speciality paper of manufacturing paper with pulp, slope screen former online concentration makes long fibre exist
There are enough spaces to keep its suspended state during online to prevent wadding poly-.Because online concentration is low, this requires slope screen former
The substantial amounts of dehydration in sheet forming, and whole dehydration and shaping basic synchronization progress, multiple, for a long time filling fiber
Be molded in the case of point unfolding, unlike fourdrinier wire, cylinder mould machine in a short time, short distance internal shaping, this ensures that shaping
After have preferable evenness.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical scheme will be carried out below
Detailed description.Obviously, described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are resulting on the premise of creative work is not made to be owned
Other embodiment, belongs to the scope that the present invention is protected.
A kind of embodiment 1, inclined-wire form method prepares the industrial method of polyimide fiber insulating paper：
（1）Polyimides chopped strand is disperseed in scattered pond to obtain the suspension containing chopped strand, is diluted with water；It is dilute
It is 3us/cm to release with the electrical conductivity of water；The length of the chopped strand is 3 mm；Mixing time when scattered is 0.5 h；Add water
Polyimide fiber suspension concentration is diluted to for 0.5 wt ‰；
（2）Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniform mixing is obtained
Pulp suspension；Described pulp is the one or more in Fanglun slurry cake, PSA fiber pulp or polyimides pulp；Mashing
Concentration be 0.1%, beating time be 5 min；It is 60% that chopped strand, which accounts for pulp suspension mass percent,；The pulp is virtue
One kind in synthetic fibre pulp, PSA fiber pulp or polyimides pulp；
（3）Pulp suspension is obtained into polyimides body paper using inclined-wire form technique；Slurry passes through oblique after being starched by pulp distributor cloth
Net former is molded, and the online concentration of inclined wire is 0.01 ‰, jet-wire ratio：0.3；Go out the mass dryness fraction of oblique-net part page：15%；Operation
Speed：10m/min；
（4）Body paper is carried out to obtain polyimides paper product after hot-pressing processing, cooling；The temperature of the hot pressing is 160 DEG C, described
The line pressure of hot pressing is 50 kg/cm2, the speed of the hot pressing is 3 m/min.
A kind of embodiment 2, inclined-wire form method prepares the industrial method of polyimide fiber insulating paper：
（1）Polyimides chopped strand is disperseed in scattered pond to obtain the suspension containing chopped strand, is diluted with water；Dilution
It is 10us/cm with the electrical conductivity of water；The length of the chopped strand is 10mm；Mixing time when scattered is 5h；It is diluted with water
It is 6wt ‰ to polyimide fiber suspension concentration；
（2）Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniform mixing is obtained
Pulp suspension；Described pulp is the one or more in Fanglun slurry cake, PSA fiber pulp or polyimides pulp；Mashing
Concentration be 0.8%, beating time is 100min；It is 95% that chopped strand, which accounts for pulp suspension mass percent,；The pulp choosing
1 is pressed from Fanglun slurry cake and PSA fiber pulp：The mixture of 1 composition.
（3）Pulp suspension is obtained into polyimides body paper using inclined-wire form technique；After slurry is starched by pulp distributor cloth
It is molded through slope screen former, the online concentration of inclined wire is 3 ‰, jet-wire ratio：1；Go out the mass dryness fraction of oblique-net part page：18%；Run car
Speed： 80m/min；
（4）Body paper is carried out to obtain polyimides paper product after hot-pressing processing, cooling；The temperature of the hot pressing is 360 DEG C, described
The line pressure of hot pressing is 500kg/cm2, the speed of the hot pressing is 80m/min.
A kind of embodiment 3, inclined-wire form method prepares the industrial method of polyimide fiber insulating paper：
（1）Polyimides chopped strand is disperseed in scattered pond to obtain the suspension containing chopped strand, is diluted with water；It is dilute
It is 6us/cm to release with the electrical conductivity of water；The length of the chopped strand is 7mm；Mixing time when scattered is 1h；It is diluted with water
It is 3wt ‰ to polyimide fiber suspension concentration；
（2）Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniform mixing is obtained
Pulp suspension；Described pulp is the one or more in Fanglun slurry cake, PSA fiber pulp or polyimides pulp；It is chopped
The incorporation time of fiber and pulp is that 2h obtains pulp suspension；The concentration of mashing is 0.3%, and beating time is 20min；Be chopped fibre
It is 75% that dimension, which accounts for pulp suspension mass percent,；The pulp is selected from Fanglun slurry cake and polyimides pulp presses 1：2 compositions it is mixed
Compound;
（3）Pulp suspension is obtained into polyimides body paper using inclined-wire form technique；Slurry passes through oblique after being starched by pulp distributor cloth
Net former is molded, and the online concentration of inclined wire is 0.2 ‰, jet-wire ratio：0.6；Go out the mass dryness fraction of oblique-net part page：20%；Run car
Speed：40m/min；It is dehydrated pressure difference and keeps constant；Paper is finally quantitative：70g/m2；
（4）Body paper is carried out to obtain polyimides paper product after hot-pressing processing, cooling；The temperature of the hot pressing is 260 DEG C, described
The line pressure of hot pressing is 250kg/cm2, the speed of the hot pressing is 30m/min.
A kind of embodiment 4, inclined-wire form method prepares the industrial method of polyimide fiber insulating paper, including following step
Suddenly：
（1）Polyimides chopped strand is disperseed in scattered pond to obtain the suspension containing chopped strand, is diluted with water；It is dilute
It is 5us/cm to release with the electrical conductivity of water；The length of the chopped strand is 5mm；Mixing time when scattered is 2.5h；Add water dilute
It is 2wt ‰ to release to polyimide fiber suspension concentration；
（2）Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniform mixing is obtained
Pulp suspension；Described pulp is the one or more in Fanglun slurry cake, PSA fiber pulp or polyimides pulp；Mashing
Concentration be 0.5%, beating time is 50min；It is 85% that chopped strand, which accounts for pulp suspension mass percent,；The pulp is virtue
Synthetic fibre pulp, PSA fiber pulp or polyimides pulp press 3：2：The mixture of 1 composition.
（3）Pulp suspension is obtained into polyimides body paper using inclined-wire form technique；After slurry is starched by pulp distributor cloth
It is molded through slope screen former, the online concentration of inclined wire is 0.05 ‰, jet-wire ratio：0.5；Go out the mass dryness fraction of oblique-net part page：19%；
Operating speed 30m/min；
（4）Body paper is carried out to obtain polyimides paper product after hot-pressing processing, cooling；The temperature of the hot pressing is 200 DEG C, described
The line pressure of hot pressing is 100kg/cm2, the speed of the hot pressing is 35m/min.
A kind of embodiment 5, inclined-wire form method prepares the industrial method of polyimide fiber insulating paper：
（1）Polyimides chopped strand is disperseed in scattered pond to obtain the suspension containing chopped strand, is diluted with water；Dilution
It is 5us/cm with the electrical conductivity of water；The length of the chopped strand is 10mm；Mixing time when scattered is 40 min；Add water dilute
It is 2wt ‰ to release to polyimides chopped strand suspension concentration；
（2）Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniform mixing is obtained
Pulp suspension；Described pulp is Fanglun slurry cake；The concentration of mashing is 0.7%, and beating time is 45min；Chopped strand accounts for slurry
Pulp suspension mass percent is 95%；
（3）Pulp suspension is obtained into polyimides body paper using inclined-wire form technique；Slurry passes through oblique after being starched by pulp distributor cloth
Net former is molded, and the online concentration of inclined wire is 0.5 ‰, jet-wire ratio：0.6；Go out the mass dryness fraction of oblique-net part page：18%；Run car
Speed：40m/min；
（4）Body paper is carried out to obtain polyimides paper product after hot-pressing processing, cooling；The temperature of the hot pressing is 330 DEG C, described
The line pressure of hot pressing is 400kg/cm2, the speed of the hot pressing is 65m/min.
Through examining, polyimide fiber insulating paper transverse tensile strength >=39N/cm of preparation, longitudinal tensile strength >=
13N/cm, is provided simultaneously with good resistance to elevated temperatures, can continuously be used for a long time below 260 DEG C, is also equipped with splendid electricity absolutely
Edge, dielectric strength >=15kV/mm, dielectric constant is 1.5-2.5, close with dielectric constant of air, in high temperature, low temperature and humidity
Excellent electrical insulating property can be kept under environment.The fabulous electrical insulating property of polyimide high temperature-resistant insulating paper and chemical stability etc.
The demand in high-temperature insulation material field can be met, with the high speed development of science and technology, polyimide high temperature-resistant insulating composite material
With higher research and application value.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any to be familiar with this skill
The technical staff in art field the invention discloses technical scope in, change or replacement can be readily occurred in, should all be covered in this hair
Within bright protection domain.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
1. a kind of inclined-wire form method prepares the industrial method of polyimide fiber insulating paper, it is characterised in that including following step
Suddenly：
（1）Polyimides chopped strand is disperseed in scattered pond to obtain the suspension containing chopped strand, is diluted with water；Dilution
It is 3-10us/cm with the electrical conductivity of water；The length of the chopped strand is 3 mm -10mm；Mixing time when scattered is 0.5h
-5h；Polyimides chopped strand suspension concentration is diluted with water to for-the 6wt ‰ of 0.5 wt ‰；
（2）Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniform mixing is obtained
Pulp suspension；Described pulp is the one or more in Fanglun slurry cake, PSA fiber pulp or polyimides pulp；Mashing
Concentration be 0.1%-0.8%, beating time be 5 min -100min；Chopped strand accounts for pulp suspension mass percent
60%-95%；
（3）Pulp suspension is obtained into polyimides body paper using inclined-wire form technique；Slurry passes through oblique after being starched by pulp distributor cloth
Net former is molded, and the online concentration of inclined wire is 0.01 ‰ -3 ‰, jet-wire ratio：0.3-1；Go out the mass dryness fraction of oblique-net part page：≥
15%；Operating speed：10-80m/min；
（4）Body paper is carried out to obtain polyimides paper product after hot-pressing processing, cooling；The temperature of the hot pressing is 160 DEG C -360
DEG C, the line pressure of the hot pressing is 50 kg/cm2-500kg/cm2, the speed of the hot pressing is 3 m/min -80m/min.
2. inclined-wire form method according to claim 1 prepares the industrial method of polyimide fiber insulating paper, its feature
It is：Step（3）In, the online concentration of inclined wire is 0.2 ‰；It is dehydrated pressure difference and keeps constant；Paper is finally quantitative：20-90g/m2；
The classification of head box is flowing full formula head box or open headbox.
3. inclined-wire form method according to claim 1 prepares the industrial method of polyimide fiber insulating paper, its feature
It is, step（1）The length of the chopped strand is 5 mm -7mm；Mixing time when scattered is 1h -3h.
4. inclined-wire form method according to claim 1 prepares the industrial method of polyimide fiber insulating paper, its feature
It is, step（1）In be diluted with water to polyimide fiber suspension concentration for the -3wt ‰ of 2wt ‰.
5. inclined-wire form method according to claim 1 prepares the industrial method of polyimide fiber insulating paper, its feature
It is：Step（2）One or more of the pulp in Fanglun slurry cake, PSA fiber pulp or polyimides pulp.
6. inclined-wire form method according to claim 1 prepares the industrial method of polyimide fiber insulating paper, its feature
It is, step（2）The concentration of the mashing is 0.4%-0.6%, and beating time is 20min -50min.
7. inclined-wire form method according to claim 1 prepares the industrial method of polyimide fiber insulating paper, its feature
It is, step（2）The incorporation time of middle chopped strand and pulp is 0.5 h -4h.
8. inclined-wire form method according to claim 1 prepares the industrial method of polyimide fiber insulating paper, its feature
It is, step（2）Middle chopped strand accounts for pulp suspension mass percent for 70%-85%.
9. inclined-wire form method according to claim 1 prepares the industrial method of polyimide fiber insulating paper, its feature
It is：Step（4）The temperature of the hot pressing is 200 DEG C -260 DEG C, and the line pressure of the hot pressing is 150 kg/cm2-350kg/
cm2, the speed of the hot pressing is 20 m/min -50m/min.
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| CN107724140A (en) * | 2017-11-14 | 2018-02-23 | 宁波日新恒力科技有限公司 | A kind of polyarylate fiber base battery barrier film and its preparation method and application |
| CN109024094A (en) * | 2018-08-13 | 2018-12-18 | 华南理工大学 | A kind of micro nanometer fiber cellulose fiber/aramid fiber composite-insulating paper and preparation method thereof |
| CN110685188A (en) * | 2018-07-04 | 2020-01-14 | 康利源科技（天津）股份有限公司 | Production process of diamond lattice adhesive dispensing insulation paper |
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| CN107724140A (en) * | 2017-11-14 | 2018-02-23 | 宁波日新恒力科技有限公司 | A kind of polyarylate fiber base battery barrier film and its preparation method and application |
| CN110685188A (en) * | 2018-07-04 | 2020-01-14 | 康利源科技（天津）股份有限公司 | Production process of diamond lattice adhesive dispensing insulation paper |
| CN109024094A (en) * | 2018-08-13 | 2018-12-18 | 华南理工大学 | A kind of micro nanometer fiber cellulose fiber/aramid fiber composite-insulating paper and preparation method thereof |
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