CN101892611A - Processing technology of polysulfonamide insulation paper - Google Patents
Processing technology of polysulfonamide insulation paper Download PDFInfo
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- CN101892611A CN101892611A CN2010102560372A CN201010256037A CN101892611A CN 101892611 A CN101892611 A CN 101892611A CN 2010102560372 A CN2010102560372 A CN 2010102560372A CN 201010256037 A CN201010256037 A CN 201010256037A CN 101892611 A CN101892611 A CN 101892611A
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Abstract
The invention relates to a processing technology of polysulfonamide insulation paper, which comprises the preparation of fibrid pulp and the preparation of long fibered pulp, and then the polysulfonamide insulation paper is prepared by a paper making process and a hot pressed splicing process. The preparation of the fibrid pulp comprises the steps of: filtering a precipitant water solution; filter-pressing a polysulfonamides resin slurry; mixing in a precipitation machine with ratio of the inflow of the polysulfonamides resin slurry to the inflow of dimethylacetylamide to be 1:12-28; introducing the mixture into a centrifugal washer through a fibrid collecting tank; and eliminating water by centrifugation. The preparation of the long fibered pulp comprises the steps of: adding long fibers into a centrifugal washer; washing the long fibers repeatedly, and eliminating water by centrifugation. The paper making process comprises the steps of: pulping and beating the fibrid pulp, pulping the long fibered pulp, and blending the two pulps with 30-70% of the fibrid pulp and 30-70% of the long fibered pulp; introducing the blended pulp of fiber paper into a high-level box, a three-stage grit catcher, a stock tank, a pulp stabilizing box and a flow box in sequence; making paper by passing an inclined wire, pressing and drying; and splicing the paper by hot press.
Description
Technical field
The invention belongs to insulating paper and make field, especially a kind of processing technology of polysulfonamide insulation paper.
Background technology
The main chemical substance of polysulfonamide insulation paper is PPSU terephthalamide (an abbreviation polysulfonamides), has good heat resistance, flame resistance, the DIMENSIONAL STABILITY of (general 180 ℃) under the high temperature, electrical insulating property, resistance to ag(e)ing, radiation resistance, resistance to acids and bases is also good to the stability of bleaching agent, reductant, organic solvent etc.Virtue sulfone synthetic fibre can be used as high-temperature insulation material and is applied to the field that motor, corona machine, transformer, cable etc. need high-temperature insulation, also can be used for aircraft, guided missile, aerospace craft, satellite, early warning plane etc. as heat insulation support protective material.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of processing technology of polysulfonamide insulation paper.
The present invention solves the problems of the technologies described above the technical scheme of being taked: a kind of processing technology of polysulfonamide insulation paper, comprise the preparation of fibrid pulp and the preparation of long fiber pulp, fibrid pulp and long fiber pulp are made polysulfonamide insulation paper through paper-making process and hot pressing fusion process again, wherein
1) preparation of fibrid pulp, fibrid pulp comprise polysulfonamides resin slurries, precipitating agent dimethylacetylamide and water, and the preparation method is:
The first step: with concentration be respectively 10～15% and relative viscosity be that 1.3～1.7 polysulfonamides paste resin hydraulic pressure filters 200～400 mesh filter screens and obtains polysulfonamides resin slurries, concentration is that 30～40% the precipitating agent aqueous solution filters through 400～500 mesh filter screens and obtains the precipitating agent aqueous solution;
Second step: the polysulfonamides resin slurries and the precipitating agent aqueous solution are mixed formation fibrid mixed slurry in precipitation machine, wherein, the influx of polysulfonamides resin slurries is 1:12～28 with the ratio of the influx of dimethylacetylamide;
The 3rd step: the fibrid mixed slurry enters centrifugal scrubber through the fibrid feeder, adds the centrifugal moisture of removing after the water washing, makes the fibrid pulp, and concentration is 75～85%, and is standby;
2) described long fiber pulp comprises long fiber and water, and the preparation method is:
Long fiber adds centrifugal scrubber, adds warm water and repeatedly washs the also centrifugal moisture of removing, and makes the long fiber pulp, and concentration is 80～90%, and is standby;
3) described paper-making process is:
The first step: the fibrid pulp enters hydrabrusher and adds the water pulping, and through two mill making beating, making the fibrid dispersion liquid concentration is 2～3% again; The long fiber pulp enters hydrabrusher and adds the water pulping, and making the long fiber dispersion liquid concentration is 0.5～1%;
Second step: fibrid pulp dispersion liquid after pulping, the making beating and the long fiber pulp dispersion liquid behind the pulping are mixed into fiber paper mixed slurry in stock tank, are by weight percentage:
Fibrid pulp 30～70%;
Long fiber pulp 30～70%;
The 3rd step: the fibrous paper mixed slurry enters header box, three grades of desanders, stock tank, slurry-stablizing case and head boxs successively;
The 4th step: cross oblique net and manufacture paper with pulp, online concentration is 0.4～1 ‰;
The 5th step: squeezing obtains fibrous paper 70～100 ℃ of oven dry;
4) hot pressing fusion process is carried out the hot pressing welding to fibrous paper at 200～300 ℃, and linear pressure is 0.98～2.45KN/cm, and fibrous paper makes the finished paper polysulfonamide insulation paper through the hot pressing welding, and finished paper is quantitatively at 20～200g/m
2, even higher.
Described polysulfonamide insulation paper insulating paper is made up of microfibre (abbreviation fibrid) and long fiber two major parts, the proportioning of its fibrid is 30～70%, and long stapled proportioning is 30～70%, and can adjust fibrid and long stapled proportioning according to the difference of purposes, concrete fibrid and long fiber the proportioning meter of percentage amounts by weight can be 30:70,35:65,40:60,45:55,50:50,55:45,60:40,65:35 or 70:30.
On the such scheme basis, the concentration of described fibrid pulp can be 75,78,80,82 or 85%, in preparation fibrid pulp process, the ratio of the influx of the influx of described polysulfonamides resin slurries and dimethylacetylamide (DMAC) can be 1:12,14,16,18,20,22,24,26 or 28.
On the such scheme basis, the concentration of described long fiber pulp can be 80,82,84,86,88 or 90%.
In paper-making process, the fibrid dispersion liquid concentration after pulping and making beating can be 2,2.2,2.5,2.8 or 3%; The long fiber dispersion liquid concentration can be 0.5,0.6,0.7,0.8,0.9 or 1% behind pulping.
The online concentration of fibrous paper mixed slurry is specifically as follows 0.4,0.5,0.6,0.7,0.8,0.9 or 1 ‰.
In addition insulating paper can also can MULTILAYER COMPOSITE for individual layer, has improved improved strength evenness thereby play, and reduces the effect of pin hole.
On the basis of such scheme, in the preparation of fibrid pulp, the concentration of concrete polysulfonamides resin slurries can be 10,11,12,13,14 or 15%, and relative viscosity can be 1.3,1.4,1.5,1.6 or 1.7.
On the basis of such scheme, in the preparation of fibrid pulp, the concentration of the concrete precipitating agent aqueous solution can be 30,32,35,38 or 40%.
On the basis of such scheme, in the preparation of fibrid pulp, the rotating speed of described precipitation machine rotor is 2900～7000rmp/min.
On the basis of such scheme, the fibrid mixed slurry concentration in precipitation machine exit is 0.5～1%, and beating degree is 36～58 ° of SR.
On the basis of such scheme, in the preparation of long fiber pulp, described long stapled length 6～8mm, fiber number 1.5～2denier, elongation at break 20～30%.
On the basis of such scheme, in the preparation of long fiber pulp, the water temperature of described warm water is 55～65 ℃, and centrifugal scrubber adds the water centrifuge washing 3～5 times.
On the basis of such scheme, in the first step of paper-making process, the beating degree of fibrid pulp in two mills exit is 65～75 ° of SR.
On the basis of such scheme, in the described paper-making process, the coiling speed of fibrous paper is 30～80m/min.
On the basis of such scheme, in the described hot pressing fusion process, the coiling speed of finished paper is 20～70m/min.
The invention has the beneficial effects as follows: because the original beating degree of fibrid increases to 35 ° more than the SR from general 20 ° of SR.From the tensile strength and the electric breakdown strength that form paper raising (seeing Table) is arranged all; Because the raising of the rotating speed of precipitation machine has the phenomenon of clogging the precipitation machine spout when having solved high viscosity slurry, improve drawing-off and cut off ability, guaranteed the fibrid quality of stability; By adapting to the oblique net paper machine (tiltedly the characteristics of net are online concentration paper) that long fiber is manufactured paper with pulp, change formation of sheet; By the hot pressing welding, make the tensile strength, folding strength, electric breakdown strength etc. all be significantly increased (seeing Table two) of paper; Heat resistance is than U.S. Nomex paper good (seeing Table three).
Fibre furnish: fibrid 40%, long fiber 60%.
Fibre furnish: fibrid: 50%, 25 ° of SR of beating degree;
Long fiber: 50%.
Condition determination: the heavy 78mg of sample, 10 °/min of programming rate, nitrogen flow 200ml/min.
Description of drawings
Fig. 1 is the process chart of fibrid pulp preparation among the present invention.
Fig. 2 is the process chart of medium-length fibre pulp preparation of the present invention.
Fig. 3 is the process chart of paper-making process among the present invention.
The specific embodiment
Embodiment 1
A kind of processing technology of polysulfonamide insulation paper comprises the preparation of fibrid pulp and the preparation of long fiber pulp, and fibrid pulp and long fiber pulp are made polysulfonamide insulation paper through paper-making process and hot pressing fusion process again, wherein,
1) preparation of fibrid pulp sees also Fig. 1 for shown in the process chart of fibrid pulp preparation among the present invention, and described fibrid pulp comprises polysulfonamides resin slurries, precipitating agent dimethylacetylamide and water, and the preparation method is:
The first step: with concentration be 10～15% and relative viscosity be that 1.3～1.7 polysulfonamides paste resin hydraulic pressure filters 200～400 mesh filter screens, be that 30～40% the precipitating agent aqueous solution filters through 400～500 mesh filter screens with concentration;
Second step: the polysulfonamides resin slurries after will filtering and the precipitating agent aqueous solution are in precipitation machine, the rotating speed of precipitation machine rotor is 4000rmp/min, mix and form the fibrid mixed slurry, wherein, the influx of polysulfonamides resin slurries is 1:20 with the ratio of the influx of dimethylacetylamide, and the fibrid mixed slurry concentration in precipitation machine exit is 0.5～1%, and beating degree is 36～58 ° of SR;
The 3rd step: the fibrid mixed slurry enters centrifugal scrubber through the fibrid feeder, adds entry and the centrifugal moisture of removing, and makes concentration and be 75～85% fibrid pulp, and is standby;
2) preparation of long fiber pulp sees also Fig. 2 for shown in the process chart of medium-length fibre pulp preparation of the present invention, and described long fiber pulp comprises long fiber and water, and the preparation method is:
Long fiber adds centrifugal scrubber, adds 60 ℃ of left and right sides warm water washings and the centrifugal moisture of removing, and this washing centrifugal process 3～5 times is repeatedly made concentration and be 80～90% long fiber pulp, and is standby;
3) paper-making process sees also Fig. 3 for shown in the process chart of paper-making process among the present invention, and described paper-making process is:
The first step: the fibrid pulp enters hydrabrusher and adds the water pulping, enters stock tank, and through two mill making beating, making the beating degree of fibrid pulp in two mills exit is 65～75 ° of SR again, and it is 2～3% that fibrid disperses concentration, enters blending chest;
The long fiber pulp enters hydrabrusher and adds the water pulping, and making long fiber disperse concentration is 0.5～1%, enters blending chest;
Second step: fibrid pulp and the long fiber pulp behind the pulping after pulping and the making beating are mixed into fiber paper mixed slurry in blending chest, are by weight percentage:
Fibrid pulp 50%;
Long fiber pulp 50%;
The 3rd step: the fibrous paper mixed slurry enters header box, three grades of desanders, stock tank, slurry-stablizing case and head boxs successively;
The 4th step: cross oblique net, online concentration is 0.4～1 ‰;
The 5th the step: the squeezing, 70～100 ℃ dry fibrous paper, the coiling speed of fibrous paper is 30～80m/min;
4) hot pressing fusion process 200～300 ℃ of hot pressing weldings, makes finished paper polysulfonamide insulation paper through the hot pressing welding to fibrous paper, and the coiling speed of finished paper is 20～70m/min, and linear pressure is 0.98～2.45KN/cm, and paper basis weight is at 20～200g/m
2
Embodiment 2
Step is all identical with embodiment 1, and difference is:
In fibrid pulp preparation process, the influx of polysulfonamides resin slurries is 1:12 with the ratio of the influx of dimethylacetylamide in the precipitation machine.
In paper-making process, the fibrous paper mixed slurry is by weight percentage:
Fibrid pulp 30%;
Long fiber pulp 70%.
Embodiment 3
Step is all identical with embodiment 1, and difference is:
In fibrid pulp preparation process, the influx of polysulfonamides resin slurries is 1:28 with the ratio of the influx of dimethylacetylamide in the precipitation machine.
In paper-making process, the fibrous paper mixed slurry is by weight percentage:
Fibrid pulp 70%;
Long fiber pulp 30%.
Claims (8)
1. the processing technology of a polysulfonamide insulation paper comprises the preparation of fibrid pulp and the preparation of long fiber pulp, and fibrid pulp and long fiber pulp are made polysulfonamide insulation paper through paper-making process and hot pressing fusion process again, it is characterized in that:
1) preparation of fibrid pulp, described fibrid pulp comprises polysulfonamides resin slurries, precipitating agent dimethylacetylamide and water, the preparation method is:
The first step: with concentration be 10～15% and relative viscosity be that 1.3～1.7 polysulfonamides paste resin hydraulic pressure filters 200～400 mesh filter screens, concentration is that 30～40% the precipitating agent aqueous solution filters through 400～500 mesh filter screens;
Second step: the polysulfonamides resin slurries and the precipitating agent aqueous solution are mixed formation fibrid mixed slurry in precipitation machine, wherein, the influx of polysulfonamides resin slurries is 1:12～28 with the ratio of the influx of dimethylacetylamide;
The 3rd step: the fibrid mixed slurry enters centrifugal scrubber through the fibrid feeder, adds the centrifugal moisture of removing after the water washing, makes the fibrid pulp, and concentration is 75～85%, and is standby;
2) preparation of long fiber pulp, described long fiber pulp comprises long fiber and water, the preparation method is: long fiber adds centrifugal scrubber, adds that warm water repeatedly washs and the centrifugal moisture of removing, and makes concentration and be 80～90% long fiber pulp, and is standby;
3) paper-making process may further comprise the steps:
The first step: the fibrid pulp enters hydrabrusher and adds the water pulping, and through two mill making beating, the dispersion liquid concentration that makes fibrid is 2～3% again; The long fiber pulp enters hydrabrusher and adds the water pulping, and making long stapled dispersion liquid concentration is 0.5～1%;
Second step: fibrid pulp and the long fiber pulp behind the pulping after pulping and the making beating are mixed into fiber paper mixed slurry in stock tank, are by weight percentage: fibrid pulp 30～70%; Long fiber pulp 30～70%;
The 3rd step: the fibrous paper mixed slurry enters header box, three grades of desanders, stock tank, slurry-stablizing case and head boxs successively;
The 4th step: cross oblique net, online concentration is 0.4～1 ‰;
The 5th step: squeezing;
The 6th step: obtain fibrous paper 70～100 ℃ of oven dry;
4) hot pressing fusion process: fibrous paper is carried out the hot pressing welding at 200～300 ℃, and linear pressure is 0.98～2.45KN/cm, makes the finished paper polysulfonamide insulation paper through the hot pressing welding, and finished paper is quantitatively at 20～200g/m
2
2. the processing technology of polysulfonamide insulation paper according to claim 1, it is characterized in that: in the preparation of fibrid pulp, the rotating speed of described precipitation machine rotor is 2900～7000rmp/min.
3. the processing technology of polysulfonamide insulation paper according to claim 1 and 2, it is characterized in that: the fibrid mixed slurry concentration in precipitation machine exit is 0.5～1%, beating degree is 36～58 ° of SR.
4. the processing technology of polysulfonamide insulation paper according to claim 1 is characterized in that: in the preparation of long fiber pulp, and described long stapled length 6～8mm, fiber number 1.5～2denier, elongation at break 20～30%.
5. the processing technology of polysulfonamide insulation paper according to claim 1, it is characterized in that: in the preparation of long fiber pulp, the water temperature of described warm water is 55～65 ℃, and centrifugal scrubber adds the water centrifuge washing 3～5 times.
6. the processing technology of polysulfonamide insulation paper according to claim 1, it is characterized in that: in the first step of paper-making process, the beating degree of fibrid pulp in two mills exit is 65～75 ° of SR.
7. the processing technology of polysulfonamide insulation paper according to claim 1, it is characterized in that: in the described paper-making process, the coiling speed of fibrous paper is 30～80m/min.
8. the processing technology of polysulfonamide insulation paper according to claim 1, it is characterized in that: in the described hot pressing fusion process, the coiling speed of finished paper is 20～70m/min.
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| CN104246044A (en) * | 2012-03-30 | 2014-12-24 | 沙伯基础创新塑料知识产权有限公司 | Transformer insulation paper and other non-conductive transformer components |
| CN105986506A (en) * | 2015-02-11 | 2016-10-05 | 上海特安纶纤维有限公司 | Paper material applicable to electrical insulation, and preparation method and application thereof |
| CN106223104A (en) * | 2016-07-27 | 2016-12-14 | 陕西科技大学 | A kind of method using PSA fiber to prepare aramid fiber extrusion coating paper |
| CN112342832A (en) * | 2020-11-04 | 2021-02-09 | 株洲时代新材料科技股份有限公司 | Preparation method of aromatic polyamide insulating paper |
| CN112709096A (en) * | 2019-10-26 | 2021-04-27 | 南通亚振电力科技有限公司 | High-tensile-strength insulating crepe paper and processing technology thereof |
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| CN104246044A (en) * | 2012-03-30 | 2014-12-24 | 沙伯基础创新塑料知识产权有限公司 | Transformer insulation paper and other non-conductive transformer components |
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| CN112709096A (en) * | 2019-10-26 | 2021-04-27 | 南通亚振电力科技有限公司 | High-tensile-strength insulating crepe paper and processing technology thereof |
| CN112342832A (en) * | 2020-11-04 | 2021-02-09 | 株洲时代新材料科技股份有限公司 | Preparation method of aromatic polyamide insulating paper |
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