CN101748647B - Method for regenerating mica paper through reinforcement of aramid precipitated fiber - Google Patents
Method for regenerating mica paper through reinforcement of aramid precipitated fiber Download PDFInfo
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- CN101748647B CN101748647B CN2010101083910A CN201010108391A CN101748647B CN 101748647 B CN101748647 B CN 101748647B CN 2010101083910 A CN2010101083910 A CN 2010101083910A CN 201010108391 A CN201010108391 A CN 201010108391A CN 101748647 B CN101748647 B CN 101748647B
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Abstract
The invention discloses a method for regenerating mica paper through reinforcement of aramid precipitated fiber. The method comprises the following steps: pulverizing mica flakes through high-pressure waterpower, selecting a conical hydrocyclone for hydraulic classification of the mica flakes, introducing the mica flakes to a second-stage conical hydrocyclone for classification and selection to make the mica flakes form a sizing agent suitable for papermaking; according to the requirement of the mica paper, selecting a proper classifying screen for further classification, selecting mica slurry with proper size and distribution, adding 2 to 20 percent aramid precipitated fiber into the mica slurry, uniformly mixing, performing certain beating treatment on the aramid precipitated fiber, and controlling the beating degree between 30 and 50 degree SR; introducing the aramid precipitated fiber to a front-net approach flow system of a paper machine, adding 0.005 to 0.1 percent of polyethylene oxide before a head box or a flow box of the approach flow system; and finally, performing papermaking on an uphill wire or cylinder mould paper machine, drying, and producing qualified paper. The method reduces the paper breaking in papermaking and improves the speed of the paper machine and the production efficiency.
Description
Technical field
Belong to paper industry and insulation industry crossing domain.
Background technology
Regenerating mica paper is a kind of insulating materials of high-quality, has nontoxic, tasteless, high temperature resistant, high pressure, ageing-resistant, corrosion-resistant.Product is a raw material with high quality white mica, phlogopite and artificial synthetic mica, uses mechanical feedback, copies paper, the more continuous roll web that becomes through cutting and rewinding.China's MICA is contained very abundant, all there are mineral products in provinces such as Xinjiang, Inner Mongol, Sichuan, Henan, Hebei, Jilin, Liaoning, but to being processed into various mica splitting goods, its utilization rate only about 3%～10%, has accumulated a large amount of mica flake slags to mica for many years from raw ore.Utilizing the papermaking technology to make the mica paper of the various models of raw material production with mica flake, make the mica flake more than 90% obtain comprehensive utilization, is a very important problem.Muscovite is thermal weight loss 0.4% in the time of 700 ℃, and phlogopite is thermal weight loss 0.3% in the time of 900 ℃.The characteristic that regenerating mica paper has not only kept the natural mica sheet to be had, and production cost is low, thickness deviation is little, is the regeneration product of expensive natural mica sheet therefore.Being applicable to domestic and international mica pressing plate, mica tape, fireproof cable, heavy and light industry and various household electrical appliance, is optimal in the world at present high-temperature insulation material.
Today, the manufacturing technology of mica paper and large scale integrated circuit, high temperature plastics, optical fiber are described as one of four electric to the present age, that electronics industry is made contributions big technology.Mica paper is to be raw material with fractus master slice (muscovite, phlogopite, artificial synthetic mica), under the slower speed of a motor vehicle of cylinder mould machine, copy into paper roll with the waterpower machinery pulping, cut into roll web or sheet paper again, it has kept the multiple good characteristic of natural mica, and thickness is even, the dielectric strength fluctuation range is little, can replace natural mica in a lot of Application Areass, for comprehensive utilization mica resource has been opened up wide prospect.
But regenerating mica paper is owing to be to be manufactured paper with pulp and form with copying the paper method by mica flake, has only atomic weak active force such as Van der Waals force and charge attraction power between mica flake, the intensity that does not have the natural mica sheet material, though in use compound base materials such as glass, polyester, copy in paper and the recombination process but also exist, because Strength of Mica-paper is low excessively, easily broken paper, and the speed of a motor vehicle is difficult to promote, and causes production efficiency very low.
This seminar is through long-term experimental study, discovery adds an amount of aramid fiber fibrid in the mica paper making pulp, can significantly increase the intensity of mica paper, manufacturing paper with pulp property is improving Strength of Mica-paper, when getting composite performance with other materials, reduce the disconnected paper when manufacturing paper with pulp, improve paper machine speed, enhance productivity, improve the product dielectric properties simultaneously.
Summary of the invention
The present invention invents the method that proposes a kind of regenerating mica paper through reinforcement of aramid precipitated fiber, improves the intensity of mica paper, the manufacturing paper with pulp property on paper machine.Reduce the disconnected paper when manufacturing paper with pulp, improve paper machine speed, enhance productivity, improve mica paper product dielectric properties simultaneously.
Technical scheme of the present invention is:
1) mica flake is with the high-pressure hydraulic fragmentation, and the pressure of the High-Pressure Water of nozzle ejection obtains the mica sheet slurry at 1-4MPa, and the mica flake radius-thickness ratio accounts for total more than 85% of mass fraction of mica slurry greater than 50, and pulping rate is more than 80%;
2) selecting φ 250, cone angle is that 10 °-30 ° taper hydrocyclone is further removed scale, calculus, sand grains by hydraulic classiciation with above mica slurry, greater than the thick sheet more than the 0.3mm, sand grains is discharged from slag-drip opening, mouthful flow out less than the slurry of the 0.3mm slurry of getting married and start a new life, entering second level taper hydrocyclone, to carry out classification selected, obtains 120 orders-200 order and account for the mica sheet slurry of mass fraction more than 95%;
3) choose the aramid fiber 1313 fibrid, with mill or Cao Shi beater aramid fiber fibrid is handled through beating process, beating degree is controlled at 30-50 ° of SR, and the slurry mass concentration is controlled at 3-5%;
4) aramid fiber fibrid of adding mica sheet quality 2%-20% in the mica slurry mixes;
5) will mix full and uniform aramid fiber fibrid mica slurry and send into approach system, and add polyethylene glycol oxide before header box in approach system or the head box, the polyethylene glycol oxide addition is the 0.005-0.1% of mica flake and aramid fiber quality summation;
6) moulding of manufacturing paper with pulp on tiltedly net or garden net paper machine, drying is produced qualified paper.
The present invention is improving the mica paper physical strength, when promoting mica paper production efficiency, has improved the dielectric strength and the dielectric properties of mica paper.
The environment-friendly and energy-efficient new product that the present invention adopts new technology, prescription research and development are newly produced, with high content of technology, strong innovation, have a extensive future, to promoting Hi-tech Industry Development, promote the upgrading of conventional industries, promote the class of insulating materials product, promote the development of related industry to be of great immediate significance.
Description of drawings
Accompanying drawing is a process chart of the present invention.
The specific embodiment
The technological process of production of the present invention as shown in the figure, concrete technology is as follows:
Mica flake is with the high-pressure hydraulic fragmentation, and the pressure of the High-Pressure Water of nozzle ejection is chosen in φ 250, cone angle is 20 ° about 2MPa.The taper hydrocyclone further remove scale, calculus, sand grains by hydraulic classiciation.Discharge from slag-drip opening greater than thick sheet, sand grains more than the 0.3mm, and the thin thinner slurry of the little dried 0.3mm slurry of getting married and start a new life mouthful flows out, entering second level taper hydrocyclone, to carry out classification selected, becomes the slurry that is fit to papermaking.Require to select suitable classifying screen to carry out further classification according to mica paper then, choose the mica slurry of suitable size and distribution, the aramid fiber fibrid (with respect to the mass ratio of mica flake) that adds 2%-20% therein, mix, aramid fiber is handled through certain making beating, beating degree is controlled at 30-50 ° of SR, then, enter the preceding approach system of paper machine net, add polyethylene glycol oxide before approach system header box or the head box, addition is 0.005-0.1% (with respect to the mass ratio of mica flake and aramid fiber), at last, the moulding of manufacturing paper with pulp on tiltedly net or garden net paper machine, drying is produced qualified paper.
Claims (1)
1. the method for a regenerating mica paper through reinforcement of aramid precipitated fiber is characterized in that, concrete steps are as follows:
1) mica flake is with the high-pressure hydraulic fragmentation, and the pressure of the High-Pressure Water of nozzle ejection obtains the mica sheet slurry at 1-4MPa, and the mica flake radius-thickness ratio accounts for more than 85% of total mica sheet stock quality mark greater than 50, and pulping rate is more than 80%;
2) selecting ф 250, cone angle is that 10 °-30 ° taper hydrocyclone is further removed scale, calculus, sand grains by hydraulic classiciation with above mica sheet slurry, 0.3mm above thick sheet, sand grains are discharged from slag-drip opening, mouthful flow out less than the slurry of the 0.3mm slurry of getting married and start a new life, entering second level taper hydrocyclone, to carry out classification selected, obtains 120 orders-200 order and account for the mica sheet slurry of mass fraction more than 95%;
3) choose aramid fiber fibrid, with mill or Cao Shi beater aramid fiber fibrid is handled through beating process, beating degree is controlled at 30-50 ° of SR, and the slurry mass concentration is controlled at 3-5%;
4) aramid fiber fibrid of adding mica sheet quality 2%-20% in the mica sheet slurry mixes;
5) will mix full and uniform aramid fiber fibrid mica slurry and send into approach system, and add polyethylene glycol oxide before header box in approach system or the head box, the polyethylene glycol oxide addition is the 0.005-0.1% of mica flake and aramid fiber fibrid quality summation;
6) moulding of manufacturing paper with pulp on tiltedly net or cylinder mould machine, drying is produced qualified paper.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101083910A CN101748647B (en) | 2010-02-09 | 2010-02-09 | Method for regenerating mica paper through reinforcement of aramid precipitated fiber |
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| CN2010101083910A CN101748647B (en) | 2010-02-09 | 2010-02-09 | Method for regenerating mica paper through reinforcement of aramid precipitated fiber |
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| CN101748647A CN101748647A (en) | 2010-06-23 |
| CN101748647B true CN101748647B (en) | 2011-09-14 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102328478A (en) * | 2010-07-13 | 2012-01-25 | 上海同立电工材料有限公司 | Polysulfonamide fiber-containing dry mica tape and application thereof |
| CN102330380A (en) * | 2010-07-13 | 2012-01-25 | 上海同立电工材料有限公司 | Mica paper and production method and application thereof |
| CN102760513B (en) * | 2012-07-16 | 2014-10-15 | 四川美丰云母工业有限责任公司 | Fibre mica paper and production method thereof |
| CN103469673B (en) * | 2013-09-11 | 2016-01-27 | 湖南南杰电材科技股份有限公司 | A kind of preparation method of heat conduction mica paper and application |
| CN105369672B (en) * | 2015-10-20 | 2017-06-09 | 陕西科技大学 | A kind of polyimide fiber mica paper and preparation method thereof |
| CN110106737B (en) * | 2019-06-10 | 2022-01-14 | 陕西科技大学 | Preparation method of aramid nanofiber/mica composite insulating paper |
| CN113652900A (en) * | 2021-07-27 | 2021-11-16 | 通城县云水云母科技有限公司 | Basalt/aramid/mica paper and production method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1932148A (en) * | 2006-09-30 | 2007-03-21 | 烟台氨纶股份有限公司 | Aryl fibre paper with aryl fibre choped stand as raw material and producing method thereof |
| CN101003959A (en) * | 2007-01-16 | 2007-07-25 | 陕西科技大学 | Multiple proportional layered composite manufactured amide paper of aramid fiber |
| CN101144253A (en) * | 2007-08-17 | 2008-03-19 | 钟洲 | High-temperature resistant insulation continuous sheet and manufacturing method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1932148A (en) * | 2006-09-30 | 2007-03-21 | 烟台氨纶股份有限公司 | Aryl fibre paper with aryl fibre choped stand as raw material and producing method thereof |
| CN101003959A (en) * | 2007-01-16 | 2007-07-25 | 陕西科技大学 | Multiple proportional layered composite manufactured amide paper of aramid fiber |
| CN101144253A (en) * | 2007-08-17 | 2008-03-19 | 钟洲 | High-temperature resistant insulation continuous sheet and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
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| 俞锦红等.特种纸用的非植物纤维.《纸和造纸》.2006,第25卷(第1期),53-55. * |
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