CN104594094B - A kind of method of continuous seepage PPTA-pulp - Google Patents
A kind of method of continuous seepage PPTA-pulp Download PDFInfo
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- CN104594094B CN104594094B CN201410842635.6A CN201410842635A CN104594094B CN 104594094 B CN104594094 B CN 104594094B CN 201410842635 A CN201410842635 A CN 201410842635A CN 104594094 B CN104594094 B CN 104594094B
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- slurries
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- fanglun slurry
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
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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
- 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
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Abstract
The invention discloses a kind of method of continuous seepage PPTA-pulp.The method comprises the steps: 1) para-aramid fiber is dropped in fiber pulper, add water, obtaining length through cut-out and wire-dividing broom purification is 0.5 ~ 8mm, and specific area is 3 ~ 5m
2the slurries of the Fanglun slurry cake of/g; 2) by step 1) in the slurries that obtain be transported in high-energy mill, add the mass percentage that water regulates Fanglun slurry cake in slurries, through discongesting brooming, to obtain length be 0.8 ~ 3mm, and specific area is 5 ~ 7m
2the slurries of the Fanglun slurry cake of/g; 3) by step 2) in the slurries that obtain add in grinder, add the mass percentage that water regulates Fanglun slurry cake in slurries, obtaining length through wire-dividing broom purification is 0.5 ~ 1.5mm, and specific area is 7 ~ 12m
2the Fanglun slurry cake of/g.The inventive method realizes the feeding of continous-stable by the control of screw feeder; Solve the cutting difficult problem of aramid fiber; Continuous prodution, production efficiency is high, and cost of labor is low, and the quality of production is stablized.
Description
Technical field
The invention belongs to technical field of fiber preparation, be specifically related to a kind of method of continuous seepage PPTA-pulp.
Background technology
Fanglun slurry cake is succeeded in developing in phase early 1980s by Dupont company of the U.S. on aramid filament basis, realizes industrialization subsequently.Fanglun slurry cake just obtains after carrying out surface fibrillation process to aramid fiber, and the surface texture of its uniqueness drastically increases the grasping force of mixture, is therefore suitable as very much a kind of fortifying fibre and is applied in friction and sealed product.Fanglun l414 pulp (PPTA-pulp) for light yellow wadding flower-shaped, in lint shape, its filoplume enriches, intensity is high, good stability of the dimension, and without fragility, high temperature resistant, corrosion-resistant, flexible, shrinkage factor are little, ABRASION RESISTANCE good, surface area is large, can well be combined with other material, it is a kind of supporting material, regain is 8%, and average length is 2-2.5mm, and specific area is 8m
2/ g.Fanglun l414 pulp is used as pad reinforcing material, there is good rebound performance and sealing property, to health and environment without harm, can be used as the sealing of the media such as the soda acid of Yu Shui, oil, hydro carbons and moderate strength, the pad produced has excellent sealing property and creep resistant relaxation property.Fact proved, usually only need add the pulp being less than 5%, the intensity obtaining product is equivalent to the product of 50-60% asbestos fibre enhancing.Meanwhile, Fanglun l414 pulp, for strengthening the manufactured goods such as friction, encapsulant, can be used as the substitute of asbestos for rubbed sealing material, high performance heat resistant insulating paper and reinforced composite.
The manufacture method (as No. 3767756, United States Patent (USP)) of Fanglun slurry cake becomes polymer through monomer polymerization, be dissolved in the concentrated sulfuric acid and make high molecule liquid crystal spinning solution, dry-wet spinning is shaped, winding cuts off, to pull an oar again the processing steps such as beating, technological process is long, needs solvent recovery, and special spinning equipment thus cost is high.Also there is direct polycondensation fibroblast legal system to make Fanglun slurry cake in recent years, as E.I.Du Pont Company's patent " Unexamined Patent 4-245908 " etc., but have again the problem of solvent recovery.Domestic also have more waste aramid material to process the technique of Fanglun slurry cake, but due to the intensity of aramid fiber large, modulus is high, processing difficulties, and the cutting problem of waste material hampers the output of Fanglun slurry cake always.
Summary of the invention
The object of this invention is to provide a kind of method of continuous seepage PPTA-pulp.The method has that production efficiency is high, steady quality, production cost are low, automaticity is high and the advantage such as suitable application area is wide, the inventive method is utilized to produce having a very wide distribution of the length of the Fanglun slurry cake obtained, specific area is comparatively large, and dispersive property is good, can be applicable to insulating composite material field.
The method of continuous seepage PPTA-pulp provided by the invention, comprises the steps:
(1) dropped in fiber pulper by para-aramid fiber, add water, obtaining length through cut-out and wire-dividing broom purification is 0.5 ~ 8mm, and specific area is 3 ~ 5m
2the slurries of the Fanglun slurry cake of/g;
(2) be transported in mill by the slurries obtained in step (1), add the mass percentage that water regulates Fanglun slurry cake in slurries, through discongesting brooming, to obtain length be 0.8 ~ 3mm, and specific area is 5 ~ 7m
2the slurries of the Fanglun slurry cake of/g;
(3) add in grinder by the slurries obtained in step (2), add the mass percentage that water regulates Fanglun slurry cake in slurries, obtaining length through wire-dividing broom purification is 0.5 ~ 1.5mm, and specific area is 7 ~ 12m
2the slurries of the Fanglun slurry cake of/g.
The method of above-mentioned continuous seepage PPTA-pulp, also comprises and to be carried out by the slurries of the Fanglun slurry cake obtained in step (3) dewatering, dries and the step of shredding,
Described dehydration is carried out in vacuum press filter;
Described oven dry is carried out in chain-and-slat drying machine;
Described shredding is carried out in fibre opening machine.
The method of above-mentioned continuous seepage PPTA-pulp, in step (1), described p-aramid fiber can be aramid filament, the waste silk of aramid fiber or the leftover bits and pieces of aramid fiber goods.
The method of above-mentioned continuous seepage PPTA-pulp, in step (1), described fiber pulper can be high energy fiber pulper, and the power of described fiber pulper can be 50 ~ 80KW, specifically can be 50KW, 70KW or 80KW.
Screw feeder can be adopted to be dropped into by described p-aramid fiber in described fiber pulper, the speed of described screw feeder be at full capacity time 20% ~ 100%, specifically can be 20% ~ 50%, 50% ~ 100%, 20%, 50% or 100%;
The frequency of described screw feeder is 20 ~ 50Hz, specifically can be 20Hz, 40Hz or 50Hz.
The method of above-mentioned continuous seepage PPTA-pulp, in step (1), the addition of described water can be 50% ~ 80% of described para-aramid fiber quality, specifically can be 50%.
The method of above-mentioned continuous seepage PPTA-pulp, in step (2), described mill can be high-energy mill, and the power of described mill is 30 ~ 60KW, specifically can be 30KW, 50KW or 60KW;
Add water, the mass percentage of Fanglun slurry cake described in the slurries obtained in step (2) is adjusted to 5 ~ 10%, specifically can be 5%.
The method of above-mentioned continuous seepage PPTA-pulp, in step (3), described grinder can be the grinder of two-stage or thtee-stage shiplock, specifically can be the grinder of two-stage series connection;
The power of described grinder is 30 ~ 50KW, specifically can be 30KW, 40KW or 50KW.
The method of above-mentioned continuous seepage PPTA-pulp, in step (3), adds water, the mass percentage of Fanglun slurry cake described in the slurries obtained in step (2) is adjusted to 0.2 ~ 8%, specifically can be 1.5%.
The method tool of continuous seepage PPTA-pulp of the present invention has the following advantages:
(1) feeding realizing continous-stable by the control of screw feeder realizes continuous prodution;
(2) solve the cutting difficult problem of aramid fiber, high energy fiber pulper is disposable by fibre cutting and the obtained thick slurry of wire-dividing broom purification;
(3) raw material adopts the long filament of aramid fiber or the method for pieces of cloth Physical Processing and need not the method for chemistry, does not have the generation of the three wastes to solve the problem of environmental pollution;
(4) this method is continuous prodution, and production efficiency is high, and cost of labor is low, and the quality of production stablizes the problem solving product quality fluctuation between Batch Process every batch.
Accompanying drawing explanation
Fig. 1 is the stereoscan photograph of the Fanglun slurry cake prepared in embodiment 1.
Detailed description of the invention
The experimental technique used in following embodiment if no special instructions, is conventional method.
Material used in following embodiment, reagent etc., if no special instructions, all can obtain from commercial channels.
In following embodiment, the measuring method of the performance of Fanglun slurry cake is as follows:
The specific area of Fanglun slurry cake: adopt BET nitrogen adsorption method to measure, the concrete full-automatic N2 adsorption specific surface instrument of 3H-2000BET-A type that adopts is tested;
The length of Fanglun slurry cake: adopt the graduated microscope of band or ESEM to carry out observation to sample and detect.
Embodiment 1, continuous seepage PPTA-pulp
Continuous seepage PPTA-pulp as follows:
(1) the aramid fiber waste silk getting 20 kilograms puts into the funnel of screw feeder, adjustment screw feeder speed be at full capacity time 20%, the frequency of screw feeder is 20Hz, add the water yield of aramid fiber quality 50% in high energy fiber pulper (the high energy fiber pulper of the DFHN8 type of east, Dandong Machinery Plant of Light Industry), high energy fiber pulper power is 80KW, obtaining length is 1 ~ 3.5mm, and specific area is 4.5m
2the rough slurry of the Fanglun slurry cake of/g.
(2) be transported in high-energy mill by the above-mentioned rough slurry prepared, add water, in adjustment slurries, the mass percentage of Fanglun slurry cake is 5%, and the power of high-energy mill is 60KW, and obtaining length is 0.8 ~ 3mm, and specific area is 6.5m
2the slurries of the Fanglun slurry cake of/g.
(3) by the slurries of the above-mentioned Fanglun slurry cake prepared through two-stage series connection grinder, add water, the mass percentage controlling Fanglun slurry cake in slurries is 1.5%, and the power regulating grinder is 50KW, obtaining length is 0.5 ~ 1.5mm, and specific area is 12m
2the slurries of the Fanglun slurry cake of/g.
(4) divide by belt vacuum filter press filtrate the slab obtaining Fanglun slurry cake by above-mentioned slurries.
(5) above-mentioned slab is obtained the Fanglun slurry cake slab done by chain-and-slat drying machine continuous drying at 150 DEG C.
(6) in the fibre opening machine of constant temperature and humidity (temperature is 50 DEG C, and relative humidity is 80%), by the slab shredding of the Fanglun slurry cake after above-mentioned oven dry, finally pack shaping.
Fig. 1 is the stereoscan photograph of the Fanglun slurry cake that the present embodiment prepares, and as seen from Figure 1, the length of the Fanglun slurry cake prepared in the present embodiment is between 0.5 ~ 1.5mm.
Embodiment 2, continuous seepage PPTA-pulp
Continuous seepage PPTA-pulp as follows:
(1) the aramid fiber waste silk getting 20 kilograms puts into the funnel of screw feeder, adjustment screw feeder speed be at full capacity time 50%, the frequency of screw feeder is 40Hz, add the water yield of aramid fiber quality 50% in high energy fiber pulper (the high energy fiber pulper of the DFHN8 type of east, Dandong Machinery Plant of Light Industry), the power of high energy fiber pulper is 70KW, obtaining length is 2 ~ 4mm, and specific area is 3.5m
2the rough slurry of the Fanglun slurry cake of/g.
(2) be transported in high-energy mill by the above-mentioned rough slurry prepared, add water, in adjustment slurries, the mass percentage of Fanglun slurry cake is 5%, and the power of high-energy mill is 50KW, and obtaining length is 1 ~ 3.5mm, and specific area is 5m
2the slurries of the Fanglun slurry cake of/g.
(3) by the slurries of the above-mentioned Fanglun slurry cake prepared through two-stage series connection grinder, add water, the mass percentage controlling Fanglun slurry cake in slurries is 1.5%, and the power regulating grinder is 40KW, obtaining length is 1 ~ 2.5mm, and specific area is 10m
2the slurries of the Fanglun slurry cake of/g.
(4) divide by belt vacuum filter press filtrate the slab obtaining Fanglun slurry cake by above-mentioned slurries.
(5) above-mentioned slab is obtained the Fanglun slurry cake slab done by chain-and-slat drying machine continuous drying at 150 DEG C.
(6) at the fibre opening machine of constant temperature and humidity (temperature is 50 DEG C, and relative humidity is 80%), by the slab shredding of the Fanglun slurry cake after above-mentioned oven dry, finally pack shaping.
Embodiment 3, continuous seepage PPTA-pulp
Continuous seepage PPTA-pulp as follows:
(1) the aramid fiber waste silk getting 20 kilograms puts into the funnel of screw feeder, adjustment screw feeder speed be at full capacity time 100%, the frequency of screw feeder is 50Hz, add the water yield of aramid fiber quality 50% in high energy fiber pulper (the high energy fiber pulper of the DFHN8 type of east, Dandong Machinery Plant of Light Industry), the power of high energy fiber pulper is that to obtain length be 2 ~ 6mm to 50KW, and specific area is 3m
2the rough slurry of the Fanglun slurry cake of/g.
(2) be transported in high-energy mill by above-mentioned rough slurry, add water, in adjustment slurries, the mass percentage of Fanglun slurry cake is 5%, and the power of high-energy mill is 30KW, and obtaining length is 1 ~ 4mm, and specific area is 4.5m
2the slurries of the Fanglun slurry cake of/g.
(3) by the slurries of the above-mentioned Fanglun slurry cake prepared through two-stage series connection grinder, add water, controlling the mass percentage of Fanglun slurry cake in slurries is 1.5%, and the power regulating grinder is 30KW, and obtaining length is 1 ~ 3mm, and specific area is 8.5m
2the slurries of the Fanglun slurry cake of/g.
(4) divide by belt vacuum filter press filtrate the slab obtaining Fanglun slurry cake by above-mentioned slurries.
(5) above-mentioned slab is obtained the Fanglun slurry cake slab done by chain-and-slat drying machine continuous drying at 150 DEG C.
(6) in the fibre opening machine of constant temperature and humidity (temperature is 50 DEG C, and relative humidity is 80%), by the slab shredding of the Fanglun slurry cake after above-mentioned oven dry, finally pack shaping.
Claims (5)
1. a method for continuous seepage PPTA-pulp, comprises the steps:
(1) dropped in fiber pulper by para-aramid fiber, add water, obtaining length through cut-out and wire-dividing broom purification is 0.5 ~ 8mm, and specific area is 3 ~ 5m
2the slurries of the Fanglun slurry cake of/g;
Adopt screw feeder to be dropped into by described p-aramid fiber in described fiber pulper, the speed of described screw feeder be at full capacity time 20% ~ 100%;
The addition of described water is 50% ~ 80% of described para-aramid fiber quality;
(2) be transported in mill by the slurries obtained in step (1), add the mass percentage that water regulates Fanglun slurry cake in slurries, through discongesting brooming, to obtain length be 0.8 ~ 3mm, and specific area is 5 ~ 7m
2the slurries of the Fanglun slurry cake of/g;
Add water, the mass percentage of Fanglun slurry cake described in the slurries obtained in step (1) is adjusted to 5 ~ 10%;
(3) add in grinder by the slurries obtained in step (2), add the mass percentage that water regulates Fanglun slurry cake in slurries, obtaining length through wire-dividing broom purification is 0.5 ~ 1.5mm, and specific area is 7 ~ 12m
2the slurries of the Fanglun slurry cake of/g;
Add water, the mass percentage of Fanglun slurry cake described in the slurries obtained in step (2) is adjusted to 0.2 ~ 8%.
2. method according to claim 1, is characterized in that: described method also comprises to be undertaken the slurries of the Fanglun slurry cake obtained in step (3) dewatering, dries and the step of shredding;
Described dehydration is carried out in vacuum press filter;
Described oven dry is carried out in chain-and-slat drying machine;
Described shredding is carried out in fibre opening machine.
3. method according to claim 1 and 2, is characterized in that: in step (1), and described fiber pulper power is 50 ~ 80KW;
The frequency of described screw feeder is 20 ~ 50Hz.
4. method according to claim 1 and 2, is characterized in that: in step (2), and the power of described mill is 30 ~ 60KW.
5. method according to claim 1 and 2, is characterized in that: in step (3), and described grinder is the grinder of two-stage or thtee-stage shiplock;
The power of described grinder is 30 ~ 50KW.
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| CN108330743A (en) * | 2017-05-22 | 2018-07-27 | 海宁永欣科技咨询有限公司 | The production technology of improved fibrous paper |
| CN114775263A (en) * | 2022-05-07 | 2022-07-22 | 润华(江苏)新材料有限公司 | Preparation method of aramid pulp, aramid pulp and aramid paper |
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| CN1191397C (en) * | 2003-06-05 | 2005-03-02 | 上海依极科技有限公司 | Production of aromatic copolymide fiber dissolving pulp |
| US7740741B2 (en) * | 2005-12-21 | 2010-06-22 | E.I. Du Pont De Nemours And Company | Para-aramid pulp including meta-aramid fibrids and processes of making same |
| CN100593594C (en) * | 2008-04-01 | 2010-03-10 | 上海依极科技有限公司 | Method for producing aramid fiber pulp by aramid fiber waste material |
| CN101457405A (en) * | 2008-10-28 | 2009-06-17 | 烟台氨纶股份有限公司 | Method for preparing para-aramid dissolving pulp and products |
| CN101550613A (en) * | 2009-05-15 | 2009-10-07 | 宋福如 | Novel technique for manufacturing pulp with non-pollution waste aramid material |
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