CN107419592A - A kind of preparation method of environment-friendly type polyimide high temperature-resistant insulating composite material - Google Patents
A kind of preparation method of environment-friendly type polyimide high temperature-resistant insulating composite material Download PDFInfo
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- CN107419592A CN107419592A CN201710646748.2A CN201710646748A CN107419592A CN 107419592 A CN107419592 A CN 107419592A CN 201710646748 A CN201710646748 A CN 201710646748A CN 107419592 A CN107419592 A CN 107419592A
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- Prior art keywords
- pulp
- high temperature
- composite material
- suspension
- insulating composite
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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
- 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
-
- 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
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/48—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances fibrous materials
- H01B3/52—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances fibrous materials wood; paper; press board
Abstract
The present invention is a kind of preparation method of environment-friendly type polyimide high temperature-resistant insulating composite material：Polyimide fiber is disperseed in fiber discrete device, obtains the suspension containing polyimides chopped strand, and be diluted with water；Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniformly mixing, obtains pulp suspension；Pulp suspension is used into wet processing, is molded to obtain polyimide high temperature-resistant insulating composite material intermediate products in slope screen former；Intermediate products are subjected to hot-pressing processing, polyimide high temperature-resistant insulating composite material finished product is obtained after cooling；The inventive method realizes low online concentration, the high purpose of product institutional framework evenness in product preparation process using slope screen former shaping.Any chemical addition agent is not used in preparation process, can effectively reduce production cost, reduce wastewater treatment difficulty and the pollution to environment, while avoids influence of the addition to product dielectric properties because of chemical addition agent.
Description
Technical field
The invention belongs to insulating composite material and paper industry interleaving techniques field, and in particular to a kind of environment-friendly type polyamides is sub-
The preparation method of amine high-temperature insulation composite.
Background technology
Polyimide fiber is a kind of high-performance fiber new material, has excellent heat-resistant stable, high voltage withstanding, nothing
Poison, fire-retardant and fabulous insulating properties etc., have become Aero-Space, nuclear submarine, satellite and railroad tracks traffic, electrically absolutely
The indispensable high performance material in the field such as edge, fire-retardant.Aramid fiber or PSA fiber pulp, inherit aramid fiber or PSA fiber it is high-strength,
The good excellent characteristic of Gao Mo, temperature tolerance, surface are in villiform, and fento is grown thickly, and filoplume enriches, and have point similar with string
Silk brooming phenomenon, therefore the compound resin easily with allied fiber, water and amide-type forms hydrogen bond, improves the entanglement energy of pulp
Power, evenness is more preferable when preparing composite with other fibers, the composite property of preparation more preferably, and polyimides pulp
It is to be prepared by raw material of polyimide fiber, the good characteristic for possessing polyimide fiber, the resistance to height of polyimides can be strengthened
The intensity of warm insulating composite material.
The high-performance fiber high-temperature insulation composite being prepared by polyimide fiber and pulp has merged polyamides
The good characteristic of imine fiber and pulp, make it in generating equipment, power transmission and transforming equipment, traction locomotive, motor, electrical equipment, electronics, family
Multiple industries such as electricity, communication and new energy (wind energy, solar energy and nuclear energy) are by with boundless application.
Because polyimide fiber is chemical fibre, fiber is more thick and stiff and tool is elastic, in addition product slurry in forming process
Concentration it is extremely low, using traditional composite former can due to slurry concentration it is too low influence material shaping and product structure group
Uniformity is knitted, and then influences product strength and electrical property.In addition, the insulating composite material occurred in the market is adopted mostly
The shaping of composite is realized with the mode of chemical addition agent, and the use of additive can increase water process difficulty, pollute ring
Border, and can have a negative impact again to the dielectric properties of product.
The content of the invention
It is an object of the invention to overcome in composite preparation process slurry concentration low and influence composite shaping with
And chemical addition agent addition environmental pollution and product dielectric properties influence the problem of, there is provided one kind prepare environment-friendly type polyamides Asia
The new method of amine high-temperature insulation composite, using wet therapy forming process, is molded in slope screen former, realizes low online
Concentration, the high purpose of product evenness.
The purpose of the present invention is realized by following technical scheme；The present invention is that a kind of environment-friendly type polyimides is resistance to
The preparation method of high-temperature insulation composite, is characterized in, comprises the following steps：
（1）Polyimide fiber is disperseed in fiber discrete device, obtains the suspension containing polyimides chopped strand
Liquid, and be diluted with water；
（2）Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniformly mixing, is obtained
Pulp suspension；
（3）Pulp suspension is used into wet processing, is molded to obtain polyimide high temperature-resistant insulated compound material in slope screen former
Expect intermediate products；
（4）Intermediate products are subjected to hot-pressing processing, polyimide high temperature-resistant insulating composite material finished product is obtained after cooling.
In the preparation method technical scheme of environment-friendly type polyimide high temperature-resistant insulating composite material of the present invention, it enters
The preferable technical scheme of one step or technical characteristic are：
1st, step（1）Described in the length of chopped strand be 3 mm -10mm；The concentration of suspension is the -6wt ‰ of 0.5 wt ‰.
2nd, step（2）The concentration of the mashing is 0.1%-0.8%, and beating time is 5 min -100min；Suspension and slurry
The incorporation time of the dregs of rice is 0.5 h -4h；The mass percent that chopped strand accounts for pulp suspension is 60%-95%.
3rd, step（2）The pulp is the mixture of Fanglun slurry cake, PSA fiber pulp and polyimides pulp.During mixing,
The percentage of each raw material is preferably not below the 10% of pulp gross weight.
4th, step（4）The temperature of the hot pressing is 160 DEG C -360 DEG C, and the line pressure of the hot pressing is 50 kg/cm2-
500kg/cm2, the speed of the hot pressing is 3m/min -80m/min.
Compared with prior art, beneficial effects of the present invention are：
1st, the present invention is using polyimide fiber as raw material, using pulp as auxiliary material, using wet therapy forming process, in slope screen former
Shaping prepare polyimide high temperature-resistant insulating composite material intermediate products, then finally prepared through heat pressing process intensity and
The good polyimide high temperature-resistant insulating composite material of electrical property.In preparation process using inclined-wire form equipment realize it is low it is dense into
Type, by the preferred of molding parameter, improving product tissue structural homogeneity.
2nd, the inventive method is not added with any auxiliary agent among processing, can effectively reduce production cost, reduce at waste water
Difficulty and the pollution to environment are managed, influence of the additive to product dielectric properties is avoided, reduces the intractability of waste water
And the pollution to environment.
3rd, product made from the inventive method, the range of choice of high-temperature insulation composite has been widened, has met to send out at a high speed
Requirement of the science and technology of exhibition to high-temperature insulation material.
4th, polyimide high temperature-resistant insulating composite material strong innovation prepared by the inventive method, has promoted the industry of product
Change, have a extensive future, for breaking overseas market monopolization, realize domestic composite polyimide material large-scale production, improve
Polyimides promotes the development of new and high technology to have very important significance in the application in high-temperature insulation field.
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 part of the embodiment of the present 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, belong to the scope that the present invention is protected.
Embodiment 1, a kind of preparation method of environment-friendly type polyimide high temperature-resistant insulating composite material：
（1）Polyimide fiber is disperseed in fiber discrete device, obtains the suspension containing polyimides chopped strand
Liquid, and be diluted with water；
（2）Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniformly mixing, is obtained
Pulp suspension；
（3）Pulp suspension is used into wet processing, is molded to obtain polyimide high temperature-resistant insulated compound material in slope screen former
Expect intermediate products；
（4）Intermediate products are subjected to hot-pressing processing, polyimide high temperature-resistant insulating composite material finished product is obtained after cooling；
Embodiment 2, a kind of preparation method of environment-friendly type polyimide high temperature-resistant insulating composite material：Comprise the following steps：
（1）Polyimide fiber is disperseed in fiber discrete device, obtains the suspension containing polyimides chopped strand
Liquid, and be diluted with water；The length of the chopped strand is 3 mm；The concentration of suspension is 0.5 wt ‰；
（2）Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniformly mixing, is obtained
Pulp suspension；Described pulp is Fanglun slurry cake and PSA fiber pulp mixing composition, and the mass ratio of the two is 1：2；It is described to beat
The concentration of slurry is 0.1%, and beating time is 5 min；The incorporation time of suspension and pulp is 0.5 h；Chopped strand accounts for slurry and hanged
The mass percent of supernatant liquid is 60%；
（3）Pulp suspension is used into wet processing, is molded to obtain polyimide high temperature-resistant insulated compound material in slope screen former
Expect intermediate products；
（4）Intermediate products are subjected to hot-pressing processing, polyimide high temperature-resistant insulating composite material finished product is obtained after cooling；The heat
The temperature of pressure is 160 DEG C, and the line pressure of the hot pressing is 50 kg/cm2, the speed of the hot pressing is 3 m/min.
Embodiment 3, a kind of preparation method of environment-friendly type polyimide high temperature-resistant insulating composite material：Comprise the following steps：
（1）Polyimide fiber is disperseed in fiber discrete device, obtains the suspension containing polyimides chopped strand
Liquid, and be diluted with water；The length of the chopped strand is 10mm；The concentration of suspension is 6wt ‰；
（2）Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniformly mixing, is obtained
Pulp suspension；Described pulp is that Fanglun slurry cake and polyimides pulp are mixed, and the mass ratio of the two is 2：1；It is described
The concentration of mashing is 0.8%, beating time 100min；The incorporation time of suspension and pulp is 4h；Chopped strand accounts for slurry and hanged
The mass percent of supernatant liquid is 95%.
（3）Pulp suspension is used into wet processing, is molded to obtain polyimide high temperature-resistant insulation again in slope screen former
Condensation material intermediate products；
（4）Intermediate products are subjected to hot-pressing processing, polyimide high temperature-resistant insulating composite material finished product is obtained after cooling；The heat
The temperature of pressure is 360 DEG C, and the line pressure of the hot pressing is 500kg/cm2, the speed of the hot pressing is 80m/min.
Embodiment 4, a kind of preparation method of environment-friendly type polyimide high temperature-resistant insulating composite material：Comprise the following steps：
（1）Polyimide fiber is disperseed in fiber discrete device, obtains the suspension containing polyimides chopped strand
Liquid, and be diluted with water；The length of the chopped strand is 4mm；The concentration of suspension is 3.5 wt ‰;
（2）Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniformly mixing, is obtained
Pulp suspension；Described pulp is one kind in Fanglun slurry cake, PSA fiber pulp or polyimides pulp；The mashing
Concentration is 0.5%, beating time 15min；The incorporation time of suspension and pulp is 2h；Chopped strand accounts for pulp suspension
Mass percent is 85%.
（3）Pulp suspension is used into wet processing, is molded to obtain polyimide high temperature-resistant insulation again in slope screen former
Condensation material intermediate products；
（4）Intermediate products are subjected to hot-pressing processing, polyimide high temperature-resistant insulating composite material finished product is obtained after cooling；The heat
The temperature of pressure is 200 DEG C, and the line pressure of the hot pressing is 150kg/cm2, the speed of the hot pressing is 20m/min.
Embodiment 5, a kind of preparation method of environment-friendly type polyimide high temperature-resistant insulating composite material：Comprise the following steps：
（1）Polyimide fiber is disperseed in fiber discrete device, obtains the suspension containing polyimides chopped strand
Liquid, and be diluted with water；The length of the chopped strand is 7mm；The concentration of suspension is 2.5wt ‰;
（2）Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniformly mixing, is obtained
Pulp suspension；Described pulp is the mixture of Fanglun slurry cake, PSA fiber pulp and polyimides pulp composition, and three is by weight
Amount 1：1：1 proportioning；The concentration of the mashing is 0.2%, beating time 60min；The incorporation time of suspension and pulp is 1h；
The mass percent that chopped strand accounts for pulp suspension is 65%.
（3）Pulp suspension is used into wet processing, is molded to obtain polyimide high temperature-resistant insulation again in slope screen former
Condensation material intermediate products；
（4）Intermediate products are subjected to hot-pressing processing, polyimide high temperature-resistant insulating composite material finished product is obtained after cooling；The heat
The temperature of pressure is 320 DEG C, and the line pressure of the hot pressing is 250kg/cm2, the speed of the hot pressing is 10m/min.
Embodiment 6, a kind of preparation method of environment-friendly type polyimide high temperature-resistant insulating composite material：
（1）Polyimide fiber is disperseed in fiber discrete device, obtains the suspension containing polyimides chopped strand
Liquid, and be diluted with water；The length of the chopped strand is 10mm；The concentration of suspension is 2.5wt ‰;Separation dissipates processing time
For 40min；
（2）Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniformly mixing, is obtained
Pulp suspension；Described pulp is the mixture of Fanglun slurry cake, PSA fiber pulp and polyimides pulp composition, and three is by weight
Amount 1：1：1 proportioning；The concentration of the mashing is 0.7%, beating time 45min；The incorporation time of suspension and pulp is 3h；
The ratio of polyimide fiber and pulp is 95:5；
（3）Pulp suspension is used into wet processing, is molded to obtain polyimide high temperature-resistant insulated compound material in slope screen former
Expect intermediate products；Well mixed slurry is diluted after slag removal equipment purifies, and through head box pulp distributor in slope screen former
Middle shaping, by dehydrating, form quantification of 60g/m2Intermediate products；Concentration after pulp dilution is 1.5 ‰.
（4）Intermediate products are subjected to hot-pressing processing, polyimide high temperature-resistant insulating composite material finished product is obtained after cooling；Institute
The temperature for stating hot pressing is 330 DEG C, and the line pressure of the hot pressing is 400kg/cm2, the speed of the hot pressing is 65m/min.
Through examining, polyimide fiber insulating paper transverse tensile strength >=25N/cm of preparation, longitudinal tensile strength >=
12N/cm, good resistance to elevated temperatures is provided simultaneously with, can be used continuously for a long time below 260 DEG C, be also equipped with splendid electricity absolutely
Edge, dielectric strength >=8kV/mm, dielectric constant 1.5-2.5, approached 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 composite material and chemistry are steady
Qualitative grade can meet the needs of high-temperature insulation material field, and with the high speed development of science and technology, polyimide high temperature-resistant insulation is multiple
Condensation material has 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.
Claims (5)
1. a kind of preparation method of environment-friendly type polyimide high temperature-resistant insulating composite material, it is characterised in that comprise the following steps：
（1）Polyimide fiber is disperseed in fiber discrete device, obtains the suspension containing polyimides chopped strand,
It is diluted with water, obtains the suspension containing chopped strand；
（2）Pulp is beaten using beater, is then added in the suspension containing chopped strand, uniformly mixing, is obtained
Pulp suspension；
（3）Pulp suspension is used into wet processing, is molded to obtain polyimide high temperature-resistant insulated compound material in slope screen former
Expect intermediate products；
（4）Intermediate products are subjected to hot-pressing processing, polyimide high temperature-resistant insulating composite material finished product is obtained after cooling.
2. the preparation method of environment-friendly type polyimide high temperature-resistant insulating composite material according to claim 1, its feature exist
In：Step（1）Described in the length of chopped strand be 3 mm -10mm；The concentration of suspension is the -6wt ‰ of 0.5 wt ‰.
3. the preparation method of environment-friendly type polyimide high temperature-resistant insulating composite material according to claim 1, its feature exist
In：Step（2）The concentration of the mashing is 0.1%-0.8%, and beating time is 5 min -100min；Suspension and pulp it is mixed
The conjunction time is 0.5 h -4h；The mass percent that chopped strand accounts for pulp suspension is 60%-95%.
4. the preparation method of environment-friendly type polyimide high temperature-resistant insulating composite material according to claim 1, its feature exist
In：Step（2）The pulp is the mixture of Fanglun slurry cake, PSA fiber pulp and polyimides pulp.
5. the preparation method of environment-friendly type polyimide high temperature-resistant insulating composite material according to claim 1, its feature exist
In：Step（4）The temperature of the hot pressing is 160 DEG C -360 DEG C, and 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.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710646748.2A CN107419592A (en) | 2017-08-01 | 2017-08-01 | A kind of preparation method of environment-friendly type polyimide high temperature-resistant insulating composite material |
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| CN201710646748.2A CN107419592A (en) | 2017-08-01 | 2017-08-01 | A kind of preparation method of environment-friendly type polyimide high temperature-resistant insulating composite material |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010007919A1 (en) * | 2008-07-18 | 2010-01-21 | 東レ株式会社 | Polyphenylene sulfide fiber, process for producing the same, wet-laid nonwoven fabric, and process for producing wet-laid nonwoven fabric |
| CN102953288A (en) * | 2012-11-02 | 2013-03-06 | 陕西科技大学 | Para-aramid pulp enhanced polyimide fiber paper preparation method |
| CN106436441A (en) * | 2016-12-05 | 2017-02-22 | 江南大学 | Preparation method of polyimide fiber paper |
| CN106638114A (en) * | 2015-11-02 | 2017-05-10 | 北京化工大学 | Polyimide paper and preparation method thereof |
-
2017
- 2017-08-01 CN CN201710646748.2A patent/CN107419592A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010007919A1 (en) * | 2008-07-18 | 2010-01-21 | 東レ株式会社 | Polyphenylene sulfide fiber, process for producing the same, wet-laid nonwoven fabric, and process for producing wet-laid nonwoven fabric |
| CN102953288A (en) * | 2012-11-02 | 2013-03-06 | 陕西科技大学 | Para-aramid pulp enhanced polyimide fiber paper preparation method |
| CN106638114A (en) * | 2015-11-02 | 2017-05-10 | 北京化工大学 | Polyimide paper and preparation method thereof |
| CN106436441A (en) * | 2016-12-05 | 2017-02-22 | 江南大学 | Preparation method of polyimide fiber paper |
Non-Patent Citations (1)
| Title |
|---|
| 张运展: "《加工纸与特种纸》", 31 May 2001 * |
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Application publication date: 20171201 |
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