CN101892611B - Processing technology of polysulfonamide insulation paper - Google Patents
Processing technology of polysulfonamide insulation paper Download PDFInfo
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- CN101892611B CN101892611B CN201010256037.2A CN201010256037A CN101892611B CN 101892611 B CN101892611 B CN 101892611B CN 201010256037 A CN201010256037 A CN 201010256037A CN 101892611 B CN101892611 B CN 101892611B
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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 manufacture field, especially a kind of processing technology of polysulfonamide insulation paper.
Background technology
The dominant chemical of polysulfonamide insulation paper is PPSU terephthalamide (abbreviation polysulfonamides), there is excellent heat resistance, flame resistance, the DIMENSIONAL STABILITY of (general 180 DEG C) under 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.PSA fiber can be applied to as high-temperature insulation material 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 the processing technology providing a kind of polysulfonamide insulation paper.
The present invention solves the problems of the technologies described above taked technical scheme: 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 make polysulfonamide insulation paper through paper-making process and hot pressing fusion process again, wherein
1) preparation of fibrid pulp, fibrid pulp comprises polysulfonamides resin grout liquid, precipitating agent dimethylacetylamide and water, and preparation method is:
The first step: respectively concentration is 10 ~ 15% and the polysulfonamides resin grout liquid press filtration that relative viscosity is 1.3 ~ 1.7 is crossed 200 ~ 400 mesh filter screens and obtained polysulfonamides resin grout liquid, concentration be 30 ~ 40% the precipitating agent aqueous solution filter through 400 ~ 500 mesh filter screens and obtain the precipitating agent aqueous solution;
Second step: polysulfonamides resin grout liquid and the precipitating agent aqueous solution are mixed to form fibrid mixed slurry in precipitation machine, wherein, the influx of polysulfonamides resin grout liquid is 1:12 ~ 28 with the ratio of the influx of dimethylacetylamide;
3rd step: fibrid mixed slurry enters centrifugal scrubber through fibrid feeder, after adding water washing, centrifugal removing moisture, makes fibrid pulp, and concentration is 75 ~ 85%, for subsequent use;
2) the long fiber pulp described in comprises long fiber and water, and preparation method is:
Long fiber adds centrifugal scrubber, and warm water is repeatedly washed and centrifugal removing moisture, makes long fiber pulp, and concentration is 80 ~ 90%, for subsequent use;
3) paper-making process described in is:
The first step: fibrid pulp enters hydrabrusher and to add water pulping, then through two mill making beating, make fibrid dispersion liquid concentration be 2 ~ 3%; Long fiber pulp enters hydrabrusher and to add water pulping, makes long fiber dispersion liquid concentration be 0.5 ~ 1%;
Second step: the fibrid pulp dispersions after pulping, making beating and the long fiber pulp dispersions after pulping are mixed into fibrous paper mixed slurry in stock tank, are by weight percentage:
Fibrid pulp 30 ~ 70%;
Long fiber pulp 30 ~ 70%;
3rd step: fibrous paper mixed slurry enters header box, three grades of desanders, stock tank, slurry-stablizing case and head boxs successively;
4th step: cross oblique net and manufacture paper with pulp, online concentration is 0.4 ~ 1 ‰;
5th step: squeezing, dries at 70 ~ 100 DEG C and obtains fibrous paper;
4) hot pressing fusion process, carries out hot pressing welding to fibrous paper at 200 ~ 300 DEG C, and linear pressure is 0.98 ~ 2.45KN/cm, and fibrous paper obtains finished paper polysulfonamide insulation paper through 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 part, the proportioning of its fibrid is 30 ~ 70%, and long stapled proportioning is 30 ~ 70%, and according to the different adjustable fibrid of purposes and long stapled proportioning, the proportioning meter of concrete fibrid and long fiber 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 such scheme basis, the concentration of described fibrid pulp can be 75,78,80,82 or 85%, preparing in fibrid pulp process, the ratio of the influx of described polysulfonamides resin grout liquid and the influx of dimethylacetylamide (DMAC) can be 1:12,14,16,18,20,22,24,26 or 28.
On 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%; After pulping, long fiber dispersion liquid concentration can be 0.5,0.6,0.7,0.8,0.9 or 1%.
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 ‰.
Another insulating paper can be that individual layer also can MULTILAYER COMPOSITE, thus plays and improve improved strength evenness, reduces the effect of pin hole.
On the basis of such scheme, in the preparation of fibrid pulp, the concentration of concrete polysulfonamides resin grout liquid 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 DEG C, and centrifugal scrubber adds water centrifuge washing 3 ~ 5 times.
On the basis of such scheme, in the first step of paper-making process, fibrid pulp is 65 ~ 75 ° of SR in the beating degree in two mill exit.
On the basis of such scheme, in described paper-making process, the coiling speed of fibrous paper is 30 ~ 80m/min.
On the basis of such scheme, in 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 ° of more than SR from general 20 ° of SR.All be improved (see table one) from the tensile strength and electric breakdown strength that form paper; Due to the raising of the rotating speed of precipitation machine, when solving high viscosity slurry, there is the phenomenon of filling precipitation machine spout, improve drawing-off and cut off ability, ensure that the stability of fibrid quality; By adapting to the oblique net paper machine (tiltedly the feature of net is online concentration paper) that long fiber is manufactured paper with pulp, change formation of sheet; By hot pressing welding, make all be significantly increased (see table two) such as the tensile strength of paper, folding strength, electric breakdown strengths; Heat resistance better than U.S. Nomex paper (see table three).
Fibre furnish: fibrid 40%, long fiber 60%.
Fibre furnish: fibrid: 50%, beating degree 25 ° of SR;
Long fiber: 50%.
Condition determination: the heavy 78mg of sample, programming rate 10 °/min, nitrogen flow 200ml/min.
Accompanying drawing explanation
Fig. 1 is the process chart that in the present invention prepared by fibrid pulp.
Fig. 2 is process chart prepared by medium-length fibre pulp of the present invention.
Fig. 3 is the process chart of paper-making process in the present invention.
Detailed description of the invention
Embodiment 1
A processing technology for polysulfonamide insulation paper, comprise the preparation of fibrid pulp and the preparation of long fiber pulp, fibrid pulp and long fiber pulp make polysulfonamide insulation paper through paper-making process and hot pressing fusion process again, wherein,
1) preparation of fibrid pulp, refer to shown in process chart that Fig. 1 prepared for fibrid pulp in the present invention, described fibrid pulp comprises polysulfonamides resin grout liquid, precipitating agent dimethylacetylamide and water, and preparation method is:
Concentration is that the precipitating agent aqueous solution of 30 ~ 40% filters through 400 ~ 500 mesh filter screens by the first step: concentration is 10 ~ 15% and 200 ~ 400 mesh filter screens are crossed in the polysulfonamides resin grout liquid press filtration that relative viscosity is 1.3 ~ 1.7;
Second step: by filter after polysulfonamides resin grout liquid and the precipitating agent aqueous solution in precipitation machine, the rotating speed of precipitation machine rotor is 4000rmp/min, be mixed to form fibrid mixed slurry, wherein, the influx of polysulfonamides resin grout liquid 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%, beating degree is 36 ~ 58 ° of SR;
3rd step: fibrid mixed slurry enters centrifugal scrubber through fibrid feeder, adds water and centrifugal removing moisture, makes the fibrid pulp that concentration is 75 ~ 85%, for subsequent use;
2) preparation of long fiber pulp, refer to shown in process chart that Fig. 2 prepared for medium-length fibre pulp of the present invention, described long fiber pulp comprises long fiber and water, and preparation method is:
Long fiber adds centrifugal scrubber, and add about 60 DEG C warm water washings and centrifugal removing moisture, this washing centrifugal process 3 ~ 5 times repeatedly, makes the long fiber pulp that concentration is 80 ~ 90%, for subsequent use;
3) paper-making process, refer to Fig. 3 for shown in the process chart of paper-making process in the present invention, described paper-making process is:
The first step: fibrid pulp enters hydrabrusher and to add water pulping, enters stock tank, then through two mill making beating, make fibrid pulp be 65 ~ 75 ° of SR in the beating degree in two mill exit, fibrid dispersion concentration is 2 ~ 3%, enters blending chest;
Long fiber pulp enters hydrabrusher and to add water pulping, makes long fiber dispersion concentration be 0.5 ~ 1%, enters blending chest;
Second step: the fibrid pulp after pulping also making beating and the long fiber pulp after pulping are mixed into fibrous paper mixed slurry in blending chest, are by weight percentage:
Fibrid pulp 50%;
Long fiber pulp 50%;
3rd step: fibrous paper mixed slurry enters header box, three grades of desanders, stock tank, slurry-stablizing case and head boxs successively;
4th step: cross oblique net, online concentration is 0.4 ~ 1 ‰;
5th step: squeezing, dry to obtain fibrous paper at 70 ~ 100 DEG C, the coiling speed of fibrous paper is 30 ~ 80m/min;
4) hot pressing fusion process, to fibrous paper 200 ~ 300 DEG C of hot pressing weldings, obtains finished paper polysulfonamide insulation paper through hot pressing welding, 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, in precipitation machine, the influx of polysulfonamides resin grout liquid is 1:12 with the ratio of the influx of dimethylacetylamide.
In paper-making process, 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, in precipitation machine, the influx of polysulfonamides resin grout liquid is 1:28 with the ratio of the influx of dimethylacetylamide.
In paper-making process, fibrous paper mixed slurry, is by weight percentage:
Fibrid pulp 70%;
Long fiber pulp 30%.
Claims (6)
1. the processing technology of a polysulfonamide insulation paper, the dominant chemical of polysulfonamide insulation paper is PPSU terephthalamide, comprise the preparation of fibrid pulp and the preparation of long fiber pulp, fibrid pulp and long fiber pulp make 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 grout liquid, precipitating agent dimethylacetylamide and water, and preparation method is:
The first step: concentration is 10 ~ 15% and 200 ~ 400 mesh filter screens are crossed in the polysulfonamides resin grout liquid press filtration that relative viscosity is 1.3 ~ 1.7, concentration be 30 ~ 40% the precipitating agent aqueous solution filter through 400 ~ 500 mesh filter screens;
Second step: polysulfonamides resin grout liquid and the precipitating agent aqueous solution are mixed to form fibrid mixed slurry in precipitation machine, wherein, the influx of polysulfonamides resin grout liquid is 1:12 ~ 28 with the ratio of the influx of dimethylacetylamide;
3rd step: fibrid mixed slurry enters centrifugal scrubber through fibrid feeder, after adding water washing, centrifugal removing moisture, makes fibrid pulp, and concentration is 75 ~ 85%, for subsequent use;
2) preparation of long fiber pulp, described long fiber pulp comprises long fiber and water, described long stapled length 6 ~ 8mm, fiber number 1.5 ~ 2denier, elongation at break 20 ~ 30%, preparation method is: long fiber adds centrifugal scrubber, and warm water is repeatedly washed and centrifugal removing moisture, make the long fiber pulp that concentration is 80 ~ 90%, for subsequent use;
3) paper-making process, comprises the following steps:
The first step: fibrid pulp enters hydrabrusher and to add water pulping, then through two mill making beating, make the dispersion liquid concentration of fibrid be 2 ~ 3%, wherein, fibrid pulp is 65 ~ 75 ° of SR in the beating degree in two mill exit; Long fiber pulp enters hydrabrusher and to add water pulping, makes long stapled dispersion liquid concentration be 0.5 ~ 1%;
Second step: the fibrid pulp after pulping also making beating and the long fiber pulp after pulping are mixed into fibrous paper mixed slurry in stock tank, are by weight percentage: fibrid pulp 30 ~ 70%; Long fiber pulp 30 ~ 70%;
3rd step: fibrous paper mixed slurry enters header box, three grades of desanders, stock tank, slurry-stablizing case and head boxs successively;
4th step: cross oblique net, online concentration is 0.4 ~ 1 ‰;
5th step: squeezing;
6th step: dry at 70 ~ 100 DEG C and obtain fibrous paper;
4) hot pressing fusion process: carry out hot pressing welding at 200 ~ 300 DEG C to fibrous paper, linear pressure is 0.98 ~ 2.45kN/cm, obtains finished paper polysulfonamide insulation paper through 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, is characterized in that: in the preparation of fibrid pulp, and 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, is characterized in that: the fibrid mixed slurry concentration in precipitation machine exit is 0.5 ~ 1%, and 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 the water temperature of described warm water is 55 ~ 65 DEG C, and centrifugal scrubber adds water centrifuge washing 3 ~ 5 times.
5. the processing technology of polysulfonamide insulation paper according to claim 1, is characterized in that: in described paper-making process, and the coiling speed of fibrous paper is 30 ~ 80m/min.
6. the processing technology of polysulfonamide insulation paper according to claim 1, is characterized in that: in described hot pressing fusion process, and the coiling speed of finished paper is 20 ~ 70m/min.
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| US8980053B2 (en) * | 2012-03-30 | 2015-03-17 | Sabic Innovative Plastics Ip B.V. | Transformer paper and other non-conductive transformer components |
| CN105986506B (en) * | 2015-02-11 | 2018-09-21 | 上海特安纶纤维有限公司 | It can be used for paper wood, the preparation method and the usage of electrical apparatus insulation |
| CN106223104B (en) * | 2016-07-27 | 2018-08-03 | 陕西科技大学 | A method of aramid fiber extrusion coating paper is prepared using PSA fiber |
| 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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| JP2008012494A (en) * | 2006-07-10 | 2008-01-24 | Toray Ind Inc | Sheet for filter, filter member, and bag filter |
| CN101392475A (en) * | 2008-09-26 | 2009-03-25 | 成都龙邦新材料有限公司 | Method for preparing synthetic paper containing polysulfone amide precipitation fibers |
| CN101718002A (en) * | 2009-10-21 | 2010-06-02 | 南通信一服饰有限公司 | Method for preparing ultrafine polysulfonainide fiber |
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Patent Citations (4)
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| CN1389604A (en) * | 2002-07-16 | 2003-01-08 | 上海纺织控股（集团）公司 | Production process of aromatic polysulfone amide fiber |
| JP2008012494A (en) * | 2006-07-10 | 2008-01-24 | Toray Ind Inc | Sheet for filter, filter member, and bag filter |
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Effective date of registration: 20160408 Address after: 226400 No. 1, the Yellow River Road, Rudong County, Nantong, Jiangsu Patentee after: Jiangsu Chun Xin new material Co., Ltd. Address before: 201707, No. 1739, Union Road, Qingpu Industrial Park, Qingpu District, Shanghai Patentee before: Spring source new material (Shanghai) Co., Ltd. |