CN106498810A - A kind of preparation method of high heat conduction electric insulation paper - Google Patents
A kind of preparation method of high heat conduction electric insulation paper Download PDFInfo
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- CN106498810A CN106498810A CN201611169020.7A CN201611169020A CN106498810A CN 106498810 A CN106498810 A CN 106498810A CN 201611169020 A CN201611169020 A CN 201611169020A CN 106498810 A CN106498810 A CN 106498810A
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- electric insulation
- heat conduction
- high heat
- conduction electric
- insulation paper
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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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F13/00—Making discontinuous sheets of paper, pulpboard or cardboard, or of wet web, for fibreboard production
- D21F13/10—Making discontinuous sheets of paper, pulpboard or cardboard, or of wet web, for fibreboard production using board presses
-
- 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
- D21H11/08—Mechanical or thermomechanical pulp
-
- 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
- D21H17/37—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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/06—Paper forming aids
- D21H21/10—Retention agents or drainage improvers
Abstract
The invention discloses a kind of preparation method of high heat conduction electric insulation paper, including：1）True qualities needlebush pulpboard is pre-processed；2）Heat filling particle is pre-processed；3）Slurry after pretreatment is carried out to discongest in fluffer for the first time；It is subsequently adding through step 2）The filler grain of process, is discongested for the second time；Retention agent is added finally, third time is carried out and is discongested, obtain suspension；4）By step 3）Dehydration forming is carried out in the suspension injection sheet forming apparatus for obtaining, and high heat conduction electric insulation paper is obtained after squeezing, dried process.The present invention is using true qualities softwood pulp fiber and hexagonal boron nitride particles as raw material, adopt amphoteric starch and PAMC as retention agent to improve the retention of filler and tiny component, through being beaten, being filled with, discongest, be molded, squeeze, drying process high heat conduction electric insulation paper is obtained.The high heat conduction electric insulation paper of the present invention has the advantage of high thermal conductivity coefficient, can improve its heat dispersion when being applied in electrical equipment.
Description
Technical field
The invention belongs to paper industry and material industry interleaving techniques field, and in particular to a kind of high heat conduction electric insulation paper
Preparation method.
Background technology
Paper has long history as the insulating materials of electrical equipment, is widely used as motor, cable, capacitor and change
Insulating materials in depressor, and the main composition material of insulating materials such as laminated product, composite and preimpregnation material.Traditional
Electric insulation paper is string, mineral fibres, synthetic fibers or its blend, is used as medium by water and is deposited on fiber and makes
The thin laminated material formed on paper machine.
In actual use, big-and-middle-sized high-voltage generator, motor can produce substantial amounts of heat in running.Such as
Heat is not derived electrical equipment by fruit in time, will directly affect its operating efficiency, is shortened equipment life, is reduced its reliability.Cause
This, electrical equipment radiating has become one of modern electrical machine technology development urgent problem.Conventional electrical insulating paper due to
The characteristic of its raw material itself and its lacunose three-dimensional network-like structure, cause its heat conductivility not good enough, so as to electrically set
The standby internal heat dispersion for producing a very important thermal resistance, affecting equipment.Therefore, develop a kind of new with high-termal conductivity
The insulating paper of energy has huge market potential.
Hexagonal boron nitride (H-BN) is a kind of non-oxide ceramic material, and its crystal structure is very much like with graphite.H-BN
It is one of best material of heat conductivility in ceramic material, its thermal conductivity reaches 180～200w/ (m k)；Its thermal coefficient of expansion
It is 41 × 10 on c-axis direction-6/ DEG C, it is -2.3 × 10 on d direction of principal axis-6/ DEG C, it is minimum in ceramic material.H-BN is pottery
Best high temperature insulating material in ceramic material, room temperature resistivity is 1014Ω cm, can reach 10 when 2000 DEG C3Ω cm are high
Warm breakdown voltage 3kV/mm, low-dielectric loss, 108It is 2.5 × 10 during Hz-4, dielectric constant is 4.Therefore, can be with H-BN as leading
Heat insulation filler, string are manufactured paper with pulp prepared new high heat conduction electric insulation paper using wet papermaking technology as raw material.
Content of the invention
For the deficiency of conventional insulator paper heat conductivility difference, the purpose of the present invention prepares a kind of with high thermal conductivity coefficient
High heat conduction electric insulation paper, had both met the strength character of insulating paper and insulating properties in electrical equipment and had required, and can have been made inside which again
Heat is more rapidly conducted, and improves the heat dispersion of equipment.
The technical solution used in the present invention is：
A kind of preparation method of high heat conduction electric insulation paper, comprises the following steps：
1) true qualities needlebush pulpboard is pre-processed, standby；
2) heat filling particle is pre-processed；
3) slurry after pretreatment is carried out discongesting in fluffer for the first time；It is subsequently adding through step 2) filling out of processing
Material particle, is discongested for the second time；Retention agent is added finally, third time is carried out and is discongested, obtain suspension；
4) by step 3) carry out dehydration forming in the suspension that obtains injection sheet forming apparatus, through squeezing, dried process after
Obtain high heat conduction electric insulation paper.
Step 1) in, preprocessing process is：Tear and take true qualities needlebush pulpboard and soak 4h in deionized water, be then torn into
The little lodicule of 25mm × 25mm.Then lodicule is poured in watt power beater, deionized water is added in tank so that slurry is dense to be reached
To 2.5%, start beater and discongested to without little lumps.Weight thallium is hung up lever arm finally to start to be beaten, in beating
Degree stops after reaching 50～55 ° of SR.
Step 2) in, heat filling is hexagonal boron nitride (H-BN), and preprocessing process is：H-BN filler grains are dispersed in
In deionized water, 5000r～10000r is discongested with fluffer；Then amphoteric starch is added in filler dispersion liquid, addition is
The 5% of packing quality, discongests 5000r～10000r with fluffer.
Step 3) in, retention agent is PAMC (CPAM), and the parameter of discongesting that discongests for the first time is：Fluffer
Discongest 15000r～20000r；The parameter of discongesting that discongests for the second time is：10000r discongested by fluffer；What third time was discongested discongests ginseng
Number is：10000r discongested by fluffer.
Step 4), detailed process is：By step 3) in the suspension of gained injection sheet forming apparatus, prepare quantification of
80g/m2Heat conductive insulating paper humidity strip, then process 1min～2min through hydraulic press squeezing, remove unnecessary moisture in wet sheet,
Wet sheet after finally processed squeezing is dried in vacuum desiccator.Wherein, the pressure of hydraulic press is 0.5MPa.Paper
Drying temperature in paper dryer is 98 DEG C, and vacuum is 0.1MPa, and drying time is 10min.
Beneficial effect：The preparation method that the present invention is provided is using true qualities softwood pulp fiber and hexagonal boron nitride particles conduct
Raw material, using amphoteric starch and PAMC as retention agent, make filler grain and paper pulp fiber, paper pulp fiber
Wadding is produced by charge effect between paper pulp fiber to gather, the retention of filler and tiny component is improved.And using at oil pressure
Reason, makes paper density improve under the conditions of certain pressure, ties between heat filling and filler, filler and fiber, fiber and fiber
Close more closely, increase contact area, make into paper tensile index, folding strength and increase substantially and make the thermal conductivity factor of paper also big
Amplitude is improved.The advantage of boron nitride filling insulating paper is to be filled with that boron nitride, as filler, is ensureing which in insulating paper body paper
Can strengthen its electrical insulation properties on the premise of intensity, and can significantly lift the thermal conductivity factor of paper, expand which and leading
The application in hot material field.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.
Embodiment 1
True qualities needlebush pulpboard is pre-processed, preprocessing process is：Tear 632.5g true qualities needlebush pulpboards are taken in 5L
4h is soaked in deionized water, be then torn into the little lodicule of 25mm × 25mm.Then lodicule is poured in watt power beater, to tank
Middle addition 17L deionized waters so that slurry is dense to reach 2.5%, starts beater and is discongested to without little lumps.Finally by matter
Measure the weight thallium for 5kg hang up lever arm to start to be beaten to beating degree is 53 ° of SR, standby；H-BN heat fillings particle is carried out pre-
Process, preprocessing process is：0.455g H-BN filler grains are disperseed in deionized water, packing quality fraction in dispersion liquid
For 2%, 10000r is stirred with mixer；Then in filler dispersion liquid, add amphoteric starch, addition to be packing quality
5%, 10000r is discongested with fluffer；Weigh slurry oven dry weight 2.25g after pretreatment 10000r is discongested in fluffer,
Discongest concentration to control in mass percent 2%～2.5%；Pretreated filler dispersion liquid is subsequently adding, 5000r is discongested；Most
Add the PAMC solution 1mL that mass fraction is 0.1% afterwards, discongest 5000r, obtain suspension；Suspension is noted
Entering in sheet forming apparatus carries out dehydration forming, prepares quantification of 80g/m2Wet sheet, then through hydraulic press 0.5MPa press
Under power, squeezing processes 2min, removes in wet sheet unnecessary moisture and improves its tightness, wet after finally processed squeezing
The scraps of paper are put in paper dryer and dry, 98 DEG C of baking temperature, vacuum 0.1MPa, and high heat conduction electric insulation paper is obtained, and which is filled out
Material mass fraction is 9.6%, and thermal conductivity factor is 0.374w/ (m k), and disruptive field intensity is 7.7kV/m.
Embodiment 2
True qualities needlebush pulpboard is pre-processed, preprocessing process is：Tear 632.5g true qualities needlebush pulpboards are taken in 5L
4h is soaked in deionized water, be then torn into the little lodicule of 25mm × 25mm.Then lodicule is poured in watt power beater, to tank
Middle addition 17L deionized waters so that slurry is dense to reach 2.5%, starts beater and is discongested to without little lumps.Finally by matter
Measure the weight thallium for 5kg hang up lever arm to start to be beaten to beating degree is 53 ° of SR, standby；H-BN heat fillings particle is carried out pre-
Process, preprocessing process is：0.910g H-BN filler grains are disperseed in deionized water, packing quality fraction in dispersion liquid
For 2%, 10000r is stirred with mixer；Then in filler dispersion liquid, add amphoteric starch, addition to be packing quality
5%, 10000r is discongested with fluffer；Weigh slurry oven dry weight 2.00g after pretreatment 10000r is discongested in fluffer,
Discongest concentration to control in mass percent 2%～2.5%；Pretreated filler dispersion liquid is subsequently adding, 5000r is discongested；Most
Add the PAMC solution 1mL that mass fraction is 0.1% afterwards, discongest 5000r, obtain suspension；Suspension is noted
Entering in sheet forming apparatus carries out dehydration forming, prepares quantification of 80g/m2Wet sheet, then through hydraulic press 0.5MPa press
Under power, squeezing processes 2min, removes in wet sheet unnecessary moisture and improves its tightness, wet after finally processed squeezing
The scraps of paper are put in paper dryer and dry, 98 DEG C of baking temperature, vacuum 0.1MPa, and high heat conduction electric insulation paper is obtained, and which is filled out
Material mass fraction is 20.2%, and thermal conductivity factor is 0.483w/ (m k), and disruptive field intensity is 7.7kV/m.
Embodiment 3
True qualities needlebush pulpboard is pre-processed, preprocessing process is：Tear 632.5g true qualities needlebush pulpboards are taken in 5L
4h is soaked in deionized water, be then torn into the little lodicule of 25mm × 25mm.Then lodicule is poured in watt power beater, to tank
Middle addition 17L deionized waters so that slurry is dense to reach 2.5%, starts beater and is discongested to without little lumps.Finally by matter
Measure the weight thallium for 5kg hang up lever arm to start to be beaten to beating degree is 53 ° of SR, standby；H-BN heat fillings particle is carried out pre-
Process, preprocessing process is：1.364g H-BN filler grains are disperseed in deionized water, packing quality fraction in dispersion liquid
For 2%, 10000r is stirred with mixer；Then in filler dispersion liquid, add amphoteric starch, addition to be packing quality
5%, 10000r is discongested with fluffer；Weigh slurry oven dry weight 1.75g after pretreatment 10000r is discongested in fluffer,
Discongest concentration to control in mass percent 2%～2.5%；Pretreated filler dispersion liquid is subsequently adding, 5000r is discongested；Most
Add the PAMC solution 1mL that mass fraction is 0.1% afterwards, discongest 5000r, obtain suspension；Suspension is noted
Entering in sheet forming apparatus carries out dehydration forming, prepares quantification of 80g/m2Wet sheet, then through hydraulic press 0.5MPa press
Under power, squeezing processes 2min, removes in wet sheet unnecessary moisture and improves its tightness, wet after finally processed squeezing
The scraps of paper are put in paper dryer and dry, 98 DEG C of baking temperature, vacuum 0.1MPa, and high heat conduction electric insulation paper is obtained, and which is filled out
Material mass fraction is 31.4%, and thermal conductivity factor is 0.654w/ (m k), and disruptive field intensity is 7.8kV/m.
The heat conductive insulating paper performance and conventional insulator paper that examples detailed above 1, example 2 and 3 preparation methods of experiment are prepared is entered
Row contrast, as a result as shown in table 1 below.
1 comparing result of table
Wherein, thermal conductivity factor is promoted to relative to conventional insulator paper.
By above-described embodiment 1～3 as can be seen that using h-BN particles to add in insulating paper as filler, composite-insulating paper
Thermal conductivity factor with H-BN content increase and rises, H-BN contents for 9.6%, 20.2%%, 31.4% when, paper
Thermal conductivity factor is respectively 0.374,0.483,0.654w/ (m k), lift 54.5% respectively compared to conventional insulator paper,
99.6%th, 170.2%；Its disruptive field intensity is slightly lifted relative to conventional insulator paper.
Claims (7)
1. a kind of preparation method of high heat conduction electric insulation paper, it is characterised in that comprise the following steps：
1）True qualities needlebush pulpboard is pre-processed, standby；
2）Heat filling particle is pre-processed；
3）Slurry after pretreatment is carried out to discongest in fluffer for the first time；It is subsequently adding through step 2）The filler grain of process
Son, is discongested for the second time；Retention agent is added finally, third time is carried out and is discongested, obtain suspension；
4）By step 3）Dehydration forming is carried out in the suspension injection sheet forming apparatus for obtaining, is obtained after squeezing, dried process high
Heat conduction electric insulation paper.
2. the preparation method of high heat conduction electric insulation paper according to claim 1, it is characterised in that step 1）In, pre- place
Reason process is：Tear and take true qualities needlebush pulpboard and soak 4h in deionized water, be then torn into the little lodicule of 25mm × 25mm；Then
Lodicule is poured in watt power beater, deionized water is added in tank so that slurry is dense to reach 2.5%, starts beater and is dredged
Solve to without little lumps；Weight thallium is hung up lever arm finally to start to be beaten, is stopped after beating degree reaches 50 ~ 55 ° of SR.
3. the preparation method of high heat conduction electric insulation paper according to claim 1, it is characterised in that step 2）In, pre- place
Reason process is：Disperse in deionized water, to discongest 5000r ~ 10000r with fluffer by H-BN filler grains；Then to filler point
Amphoteric starch, addition is added to be the 5% of packing quality, discongest 5000r ~ 10000r with fluffer in dispersion liquid.
4. the preparation method of high heat conduction electric insulation paper according to claim 1, it is characterised in that step 3）In, retention
Agent is PAMC；The parameter of discongesting that discongests for the first time is：15000r ~ 20000r discongested by fluffer；Dredge for second
Solution parameter of discongesting be：10000r discongested by fluffer；The parameter of discongesting discongested of third time is：10000r discongested by fluffer.
5. the preparation method of high heat conduction electric insulation paper according to claim 1, it is characterised in that step 4）In, specifically
Process is：By step 3）In the suspension injection sheet forming apparatus of gained, quantification of 80g/m is prepared2Heat conductive insulating paper wet
Piece, then processes 1min ~ 2min through hydraulic press squeezing, removes unnecessary moisture in wet sheet, wet after finally processed squeezing
The scraps of paper are dried in vacuum desiccator.
6. the preparation method of high heat conduction electric insulation paper according to claim 5, it is characterised in that step 4）In, oil pressure
The pressure of machine is 0.5MPa.
7. the preparation method of high heat conduction electric insulation paper according to claim 1, it is characterised in that step 4）In, middle paper
The drying temperature that opens in paper dryer is 98 DEG C, and vacuum is 0.1MPa, and drying time is 10min.
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| CN201611169020.7A CN106498810B (en) | 2016-12-16 | 2016-12-16 | A kind of preparation method of high thermal conductivity electric insulation paper |
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| CN201611169020.7A CN106498810B (en) | 2016-12-16 | 2016-12-16 | A kind of preparation method of high thermal conductivity electric insulation paper |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107099045A (en) * | 2017-06-13 | 2017-08-29 | 南京林业大学 | A kind of preparation method of high heat conducting nano cellulose base electric insulation composite membrane |
| CN109629336A (en) * | 2018-10-29 | 2019-04-16 | 万玉梅 | A kind of preparation method of the flexible insulating paper of tension |
| CN112062527A (en) * | 2020-08-24 | 2020-12-11 | 华南理工大学 | Fireproof high-strong acid calcium board and preparation method and application thereof |
| CN115305740A (en) * | 2022-08-31 | 2022-11-08 | 国网黑龙江省电力有限公司电力科学研究院 | Heat-conducting insulating material for high-voltage dry-type direct-current sleeve and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107099045A (en) * | 2017-06-13 | 2017-08-29 | 南京林业大学 | A kind of preparation method of high heat conducting nano cellulose base electric insulation composite membrane |
| CN109629336A (en) * | 2018-10-29 | 2019-04-16 | 万玉梅 | A kind of preparation method of the flexible insulating paper of tension |
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| CN115305740A (en) * | 2022-08-31 | 2022-11-08 | 国网黑龙江省电力有限公司电力科学研究院 | Heat-conducting insulating material for high-voltage dry-type direct-current sleeve and preparation method thereof |
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| CN106498810B (en) | 2018-11-16 |
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