CN102154912A - Continuous preparation method of organic fiber pulp - Google Patents
Continuous preparation method of organic fiber pulp Download PDFInfo
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Abstract
The invention discloses a continuous preparation method of organic fiber pulp, which comprises the following steps of: continuously chopping a long fiber into 2-millimeter to 20-millimeter chopped fibers; pretreating the chopped fibers in a pretreatment agent for 10-20 minutes; dispersing the pretreated chopped fibers in an aqueous solution to form a dispersive system with the content of chopped fibers being 0.1-6 percent, and microfibrillating the chopped fibers; washing, filtering and drying the microfibrillated chopped fibers to prepare the pulp. Through the continuous preparation method of the organic fiber pulp, continuous stable production can be realized, the chopped fibers obtained through continuous chopping have better uniformity, high production efficiency, high microfibrillation degree and good dispersibility; and the prepared fiber pulp has uniform structure trait, large specific surface area and stable trait and quality.
Description
Technical field
The invention belongs to chemical fibre and pulp and paper technology field, be specifically related to a kind of continuous preparation method of high-strength and high-modulus fire resistant organic fibre pulp product.
Background technology
Fanglun slurry cake is a kind of the earliest by development and production of U.S. DuPont company and the business-like a kind of high-performance fibre in differentiation material of success.Because it has heat-resistant, wear-resistant, high-strength and high-modulus, specific area is big, and excellent comprehensive performances such as antioxygen index height make it be widely used in various abrasiveses, reinforcing material, fields such as high-performance paper.
CN1456719 has introduced the method for utilizing the aramid fiber leftover pieces to prepare Fanglun slurry cake, and its trough-style pulp beater of using is a Batch Process equipment, and production efficiency is low.CN101250771 has introduced the method for utilizing the aramid fiber waste silk to prepare pulp, but it also only is semicontinuous production technology.CN101440589 has proposed a kind of preliminary treatment-unite making beating two-step method and has prepared the method for p-aramid fiber pulp by the p-aramid fiber waste silk chopped fiber, but its Batch Process technology that still adopts, production efficiency is low, and properties of product are also unstable.CN101457405 has proposed a kind of preparation method of p-aramid fiber pulp, being about to long filament cuts off, be dispersed in the water then, through disc mill discongest, brooming obtains Fanglun slurry cake, it is relatively poor that pulp directly is dispersed in the water dispersion effect in the method, and the pulp product that obtains makes that not through can decentralizedly handling pulp very difficult shredding in application is even.CN101058896, CN101381898 have introduced the preparation method of Fanglun slurry cake and pbo fiber pulp respectively, but the pulp that this method is produced makes the scattering problem in the pulp existence application equally not through can decentralizedly handling.The method that JP63190087 and JP01068511 provide a kind of laboratory intermittently to prepare pulp respectively, but these technical methods do not possess industrial application value.
CN1475514 has introduced a kind of non-spinning, and non-direct polycondensation becomes method for fiber to prepare aramid fiber precipitating pulp.US5028372 proposes the p-aramid fiber gel that preparation earlier has certain degree of orientation, obtains Fanglun slurry cake by milling apparatus again.US532059 proposes to add PVP in the p-aramid fiber polymerization system, and the gel that preparation has certain orientation after the polymerization obtains under certain shear action then that fibril is thin, the higher Fanglun slurry cake of original fiber degree.Above method all belongs to pulp straight forming method.The pulp inherent viscosity that this method obtains is lower, and intensity is lower, and morphosis that can't the better controlled pulp fibers.
Summary of the invention
The objective of the invention is to overcome existing organic fiber pulp preparation method and have the problems referred to above, a kind of continuous preparation method of organic fiber pulp is provided, the present invention can continous-stable production, the staple fibre uniformity that continuous weak point is cut obtain is better, the production efficiency height, fibrillation degree height, dispersibility is good, and the structural character of the fiber pulp of preparation is even, specific area big, the proterties steady quality.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of continuous preparation method of organic fiber pulp is characterized in that, comprises the steps:
A, with the continuously short staple fiber that obtains 2-20mm of cutting of long fiber;
B, with staple fiber preliminary treatment 10min-20min in pretreating agent;
C, pretreated staple fiber is dispersed in the aqueous solution, the content that forms staple fiber is 0.1%-6% dispersion, and staple fiber is carried out fibrillation handle;
D, the staple fiber washing after fibrillation handled are filtered, and make pulp after the drying.
In the described a step, adopt rotary cutting machine to cut to long fiber is short continuously.
In the described c step, add dispersant earlier in water, staple fiber is dispersed in the aqueous solution again, the mass percent of dispersant dosage is 0.05%-1% of a staple fiber dry weight.
In the described c step, adopting disc mill that staple fiber is carried out fibrillation handles, on disc mill abrasive disc working face, have a plurality of grooves, groove is multilayer concentric circle shape and distributes around the center of abrasive disc, groove on every layer of concentric circles evenly distributes, abrasive disc between adjacent two grooves on the same circumference forms roll flute, and the gap between the adjacent two layers forms baffle arbitrarily.
In the described c step, in being 9-13 the aqueous solution, pH value adds dispersant.
Described roll flute comprises the arcwall face part of joining the planar section that formed by the abrasive disc working face and a side and planar section opposite side and groove joining.
The diameter of described groove and abrasive disc forms 5 ℃～20 ℃ angles.
Described pretreating agent is the mixed solvent of organic polar solvent and water, and the shared mass ratio of organic solvent is 50%-80% in the mixed solvent.
Described pretreating agent is the aqueous slkali of organic polar solvent, and the content of alkali is 1%-10%.
Described organic polar solvent is N,N-dimethylacetamide, N-Methyl pyrrolidone, ethanol or methyl alcohol etc.
Described dispersant is anionic dispersing agents such as NNO, MF, is macromolecule dispersing agents such as PEO, PAM perhaps, perhaps is the mixed dispersant that anionic dispersing agents and macromolecule dispersing agent are pressed arbitrary proportion.
The present invention suppresses the step of packing after also comprising the pulp shredding that will make.
Described fiber is Fanglun 1414, poly-contraposition heteroaromatic polyamide fiber, polyparaphenylene's benzene and the contour performance fibers of two oxazole fibers.
Employing the invention has the advantages that:
One, the present invention is earlier with the short continuously staple fiber that is cut into 2-20mm of long fiber, preliminary treatment 10min-20min in pretreating agent, the content that forms staple fiber again is to carry out fibrillation behind 0.1%-6% the dispersion to handle, realized the production of continous-stable, the staple fibre uniformity that continuous weak point is cut obtain is better, production efficiency height, fibrillation degree height, dispersibility is good, and the structural character of the fiber pulp of preparation is even, specific area big, the proterties steady quality.
Two, among the present invention, adopt rotary cutting machine to cut to long fiber is continuously short, can be continuous the long fiber cutting is obtained staple fiber, and the staple fiber that obtains is even.
Three, among the present invention, in water, add earlier dispersant, again staple fiber is dispersed in the aqueous solution, the mass percent of dispersant dosage is 0.05%-1% of a staple fiber dry weight, the mutual winding kink phenomenon that adopts this mode to solve poly-the uniting of wadding between the fiber and form, fiber is evenly disperseed in dispersion, dispersion effect is better, strengthened the uniformity that fiber is subjected to conquassation, rubs, the cut-out rate of fiber when having reduced defibrination, improve the brooming rate of fiber, guaranteed the steady and continuous of technology, the pulp product quality homogeneity.
Four, adopt the disc mill among the present invention that staple fiber is carried out the fibrillation processing, can weaken the cut-out function of mill, increase its conquassation, rub fiber, the wire-dividing broom purification effect, increase substantially the fibrillation degree of pulp fibers, and, guarantee that material is by abundant fibrillation by the time of staying that the baffle of this structure further increases material.
Five, among the present invention, in pH value is 9-13 the aqueous solution, add dispersant, in alkaline solution, fiber is had part swollen and peptizaiton.
Six, the roll flute of disc mill of the present invention comprises the arcwall face part of joining the planar section that formed by the abrasive disc working face and a side and planar section opposite side and groove joining, with the advantages of right angle roll flute and arc roll flute together, both increased the contact area of roll flute and material, improved the degree that fiber is subjected to conquassation, rubs, reduced the cutting action of roll flute again fiber.
Seven, the diameter of the groove of disc mill of the present invention and abrasive disc forms 5 ℃～20 ℃ angles, and when moving plate rotated, the roll flute of abrasive disc formed certain inhibition to material movement, increases the milling time of material in the mill district.
Eight, among the present invention, pretreating agent is the mixed solvent of organic polar solvent and water, and the shared mass ratio of organic solvent is 50%-80% in the mixed solvent, the pretreating agent reusable edible, both solve the problem of pretreatment of staple fiber surface hydrophobicity finish, solved the recovery energy consumption problem of finishing agent again.
Nine, among the present invention, pretreating agent is the aqueous slkali of organic polar solvent, and the content of alkali is 1%-10%.Organic polar solvent and alkali have good removal effect to the surperficial finish of synthetic fiber, and the staple fiber after this pre-treatment treatment is easier even dispersion in water.
Ten, among the present invention, organic polar solvent is N, N-dimethylacetylamide, N-Methyl pyrrolidone, ethanol or methyl alcohol, this type of intensive polar solvent has dissolution to the fiber surface finish on the one hand, on the other hand staple fiber is also had and soak into and swelling action, be beneficial to the fibrillation processed of postorder.
11, among the present invention, dispersant is anionic dispersing agents such as NNO, MF, perhaps be macromolecule dispersing agents such as PEO, PAM, it perhaps is the mixed dispersant that anionic dispersing agents and macromolecule dispersing agent are pressed arbitrary proportion, these dispersants can significantly increase the zeta potential between the staple fiber in the dispersion, and fiber is evenly disperseed in dispersion, thus guarantee fiber in fibrillation equipment by evenly conquassation, rub, wire-dividing broom purification obtains the pulp product of qualitative character homogeneous.
12, the present invention suppresses the step of packing after also comprising the pulp shredding that will make, and has solved the dispersion problem of pulp in the downstream user use.
Description of drawings
Fig. 1 is the abrasive disc structural representation of the disc mill among the present invention
Fig. 2 is the cut-away section structural representation among Fig. 1
Be labeled as among the figure: 1, groove, 2, baffle, 3, roll flute, 4, charging hole.
The specific embodiment
Embodiment 1
A kind of continuous preparation method of organic fiber pulp comprises the steps:
A, with the continuously short staple fiber that obtains 2mm of cutting of long fiber;
B, with staple fiber preliminary treatment 10minmin in pretreating agent;
C, pretreated staple fiber is dispersed in the aqueous solution, the content that forms staple fiber is 0.1% dispersion, and staple fiber is carried out fibrillation handle;
D, the staple fiber washing after fibrillation handled are filtered, and make pulp after the drying.
In a step, adopt rotary cutting machine to cut to long fiber is short continuously.In the c step, in water, add dispersant earlier, again staple fiber is dispersed in the aqueous solution, the mass percent of dispersant dosage is 0.05% of a staple fiber dry weight.Not having the fiber of suction is dried fiber, and dry weight refers to not have the weight of the fiber that absorbs water,
In the c step, adopting disc mill that staple fiber is carried out fibrillation handles, on disc mill abrasive disc working face, have a plurality of grooves, groove is multilayer concentric circle shape and distributes around the center of abrasive disc, groove on every layer of concentric circles evenly distributes, abrasive disc between adjacent two grooves on the same circumference forms roll flute, and the gap between the adjacent two layers forms baffle arbitrarily.
Roll flute comprises the arcwall face part of joining the planar section that formed by the abrasive disc working face and a side and planar section opposite side and groove joining.And the diameter of groove and abrasive disc forms 5 ℃ of angles.
Pretreating agent adopts the mixed solvent of organic polar solvent and water, and the shared mass ratio of organic solvent is 50% in the mixed solvent.Organic polar solvent is a N,N-dimethylacetamide.Dispersant is anionic dispersing agents such as NNO, MF.
Fiber is Fanglun 1414, poly-contraposition heteroaromatic polyamide fiber, polyparaphenylene's benzene and the contour performance fibers of two oxazole fibers.What select for use among the preparation method all is wet fiber.
Embodiment 2
A kind of continuous preparation method of organic fiber pulp comprises the steps:
A, with the continuously short staple fiber that obtains 20mm of cutting of long fiber;
B, with staple fiber preliminary treatment 20min in pretreating agent;
C, pretreated staple fiber is dispersed in the aqueous solution, the content that forms staple fiber is 6% dispersion, and staple fiber is carried out fibrillation handle;
D, the staple fiber washing after fibrillation handled are filtered, and make pulp after the drying.
E, will be after the pulp shredding that makes compacting packing again.
In a step, adopt rotary cutting machine to cut to long fiber is short continuously, also can adopt similar cutting machine, as long as can guarantee continuously short cutting.
In the c step, in water, add dispersant earlier, again staple fiber is dispersed in the aqueous solution, the mass percent of dispersant dosage is 1% of a staple fiber dry weight.
In the c step, adopting disc mill that staple fiber is carried out fibrillation handles, on disc mill abrasive disc working face, have a plurality of grooves, groove is multilayer concentric circle shape and distributes around the center of abrasive disc, groove on every layer of concentric circles evenly distributes, abrasive disc between adjacent two grooves on the same circumference forms roll flute, and the gap between the adjacent two layers forms baffle arbitrarily.Roll flute comprises the arcwall face part of joining the planar section that formed by the abrasive disc working face and a side and planar section opposite side and groove joining.The diameter of groove and abrasive disc forms 20 ℃ of angles.
Pretreating agent is selected the mixed solvent of organic polar solvent and water for use, and the shared mass ratio of organic solvent is 80% in the mixed solvent.Organic polar solvent is selected N-Methyl pyrrolidone for use.
Dispersant is selected macromolecule dispersing agents such as PEO, PAM for use.
A kind of continuous preparation method of organic fiber pulp comprises the steps:
A, with the continuously short staple fiber that obtains 10mm of cutting of long fiber;
B, with staple fiber preliminary treatment 15min in pretreating agent;
C, pretreated staple fiber is dispersed in the aqueous solution, the content that forms staple fiber is 4% dispersion, and staple fiber is carried out fibrillation handle;
D, the staple fiber washing after fibrillation handled are filtered, and make pulp after the drying.
In a step, adopt rotary cutting machine to cut to long fiber is short continuously.In the c step, in water, add dispersant earlier, again staple fiber is dispersed in the aqueous solution, the mass percent of dispersant dosage is 0.6% of a staple fiber dry weight.
In the c step, adopting disc mill that staple fiber is carried out fibrillation handles, on disc mill abrasive disc working face, have a plurality of grooves, groove is multilayer concentric circle shape and distributes around the center of abrasive disc, groove on every layer of concentric circles evenly distributes, abrasive disc between adjacent two grooves on the same circumference forms roll flute, and the gap between the adjacent two layers forms baffle arbitrarily.
Roll flute comprises the arcwall face part of joining the planar section that formed by the abrasive disc working face and a side and planar section opposite side and groove joining.The diameter of groove and abrasive disc forms 15 ℃ of angles.
Pretreating agent is the mixed solvent of organic polar solvent and water, and the shared mass ratio of organic solvent is 60% in the mixed solvent.Organic polar solvent is an ethanol.
Dispersant can be selected NNO and the PEO mixed dispersant by arbitrary proportion for use.
A kind of continuous preparation method of organic fiber pulp comprises the steps:
A, with the continuously short staple fiber that obtains 17mm of cutting of long fiber;
B, with staple fiber preliminary treatment 18min in pretreating agent;
C, pretreated staple fiber is dispersed in the aqueous solution, the content that forms staple fiber is 2% dispersion, and staple fiber is carried out fibrillation handle;
D, the staple fiber washing after fibrillation handled are filtered, and make pulp after the drying.
In a step, adopt rotary cutting machine to cut to long fiber is short continuously.In the c step, in being 11 the aqueous solution, pH value adds dispersant, again staple fiber is dispersed in the aqueous solution, the mass percent of dispersant dosage is 0.07% of a staple fiber dry weight.
In the c step, adopting disc mill that staple fiber is carried out fibrillation handles, on disc mill abrasive disc working face, have a plurality of grooves, groove is multilayer concentric circle shape and distributes around the center of abrasive disc, groove on every layer of concentric circles evenly distributes, abrasive disc between adjacent two grooves on the same circumference forms roll flute, and the gap between the adjacent two layers forms baffle arbitrarily.Roll flute comprises the arcwall face part of joining the planar section that formed by the abrasive disc working face and a side and planar section opposite side and groove joining.The diameter of groove and abrasive disc forms 17 ℃ of angles.
Pretreating agent is the aqueous slkali of organic polar solvent, and the content of alkali is 1%.Organic polar solvent is selected methyl alcohol for use.
Dispersant is selected the NNO anionic dispersing agents for use.
Embodiment 5
A kind of continuous preparation method of organic fiber pulp comprises the steps:
A, with the continuously short staple fiber that obtains 2-20mm of cutting of long fiber;
B, with staple fiber preliminary treatment 10min-20min in pretreating agent;
C, pretreated staple fiber is dispersed in the aqueous solution, the content that forms staple fiber is 0.1%-6% dispersion, and staple fiber is carried out fibrillation handle;
D, the staple fiber washing after fibrillation handled are filtered, and make pulp after the drying;
E, pulp are carrying out shredding processing 1-10 clocks through airslide disintegrating mill again after super-dry.
In the c step, in being 13 the aqueous solution, pH value adds dispersant, again staple fiber is dispersed in the aqueous solution, the mass percent of dispersant dosage is 0.9% of a staple fiber dry weight.
Pretreating agent is the aqueous slkali of organic polar solvent, and the content of alkali is 10%.Organic polar solvent is selected N-Methyl pyrrolidone for use.
Dispersant is MF anionic dispersing agents and the PAM macromolecule dispersing agent mixed dispersant by arbitrary proportion.
Embodiment 6
A kind of continuous preparation method of organic fiber pulp comprises the steps:
A, with the continuously short staple fiber that obtains 5mm of cutting of long fiber;
B, with staple fiber preliminary treatment 13min in pretreating agent;
C, pretreated staple fiber is dispersed in the aqueous solution, the content that forms staple fiber is 4.5% dispersion, and staple fiber is carried out fibrillation handle;
D, the staple fiber washing after fibrillation handled are filtered, and make pulp after the drying.
E, pulp handle 10 clocks carrying out shredding through airslide disintegrating mill again after super-dry.
In the c step, in being 12 the aqueous solution, pH value adds dispersant, again staple fiber is dispersed in the aqueous solution, the mass percent of dispersant dosage is 1% of a staple fiber dry weight.
Pretreating agent is the aqueous slkali of organic polar solvent, and the content of alkali is 5%.
Embodiment 7
A kind of continuous preparation method of organic fiber pulp comprises the steps:
A, with the continuously short staple fiber that obtains 5mm of cutting of long fiber;
B, with staple fiber preliminary treatment 11min in pretreating agent;
C, pretreated staple fiber is dispersed in the aqueous solution, the content that forms staple fiber is 0.1% dispersion, and by disc mill staple fiber is carried out fibrillation and handle;
D, the staple fiber washing after fibrillation handled are filtered, and make pulp after the drying.
E, pulp handle 5 clocks carrying out shredding through airslide disintegrating mill again after super-dry.
Below the disc mill that adopts among the present invention is elaborated:
The mill of disc mill comprises abrasive disc, on the abrasive disc working face, have a plurality of grooves, groove is multilayer concentric circle shape and distributes around the center of abrasive disc, groove on every layer of concentric circles evenly distributes, abrasive disc between adjacent two grooves on the same circumference forms roll flute, and the gap between the adjacent two layers forms baffle arbitrarily.
Roll flute comprises the arcwall face part of joining the planar section that formed by the abrasive disc working face and a side and planar section opposite side and groove joining.
The diameter of groove and abrasive disc forms 5 ℃～20 ℃ angles.The charging hole place of abrasive disc is provided with around circular spill feeding channel of being of charging hole, and feeding channel is inboard to be communicated with charging hole, and the groove on the ground floor outside the outside and the abrasive disc center is communicated with, and adopts this structure to be convenient to material and enters between stator and the moving plate.
Abrasive disc comprises stator and moving plate, and the baffle during defibrination on stator and the moving plate overlaps, and is convenient to according to actual conditions by regulating the clearance distance control time of staying of material in abrasive disc of two abrasive discs, the fibrillation degree of controlling fiber.
The groove of moving plate is identical with the direction of rotation of moving plate with the incline direction of roll flute, make material avoid being thrown away fast abrasive disc mill district, can effectively increase the milling time of slurry between two abrasive discs, improve the wire-dividing broom purification effect of fiber, thereby improve the fibrillation degree of fiber.
Baffle is a plurality of concentric circles around the center of abrasive disc and evenly distributes, and the number of baffle is set to 2～6, the place is provided with the concentric circles baffle at the inner different-diameter of abrasive disc, can increase the time of staying of slurry in abrasive disc, improves the fibrillation degree of fiber.
The fluted degree of depth identical, adopt this version can guarantee homogeneity in the fiber fibrillation process.
Embodiment 8
It is feedstock production pulp product that the present invention adopts the waste silk with certain intensity that produces in aramid fiber II, aramid fiber III, the long fine substandard products of the contour performance fibers of PBO or the fibre spinning process.Detailed process comprises: the long fiber weak point is cut the staple fiber that obtains 2-20mm; Adopt pretreating agent that staple fiber is carried out preliminary treatment; Staple fiber is scattered in the water, adds dispersant, and employing is discongested, refining equipment carries out fibrillation to staple fiber and handles; Washing is filtered, and gets pulp after the drying; Pulp through compacting after the airslide disintegrating mill shredding pack finished product.
Pulp product of the present invention is widely used in preparing abrasives, encapsulant, and reinforcing material, material modified, special paper products, new materials such as comb core.The pulp product fibrillation degree height that the present invention produces, dispersibility is good, and structural character is even, the production efficiency height.
Get the long fine 2kg of aramid fiber II, adopt rotary cutter to cut into the short fiber of 9mm.Short fiber put into NMP aqueous solution preliminary treatment 10min～20min of 60%.Pretreated staple fiber adding pH value is 13 the aqueous solution, adds dispersant PAM 4g simultaneously, forms the suspension dispersion, discongests by three grades of disc mills, obtains pulp suspension behind the defibrination.Washing is filtered, and the pulp that obtains after the drying carries out shredding through airslide disintegrating mill to be handled, and obtains aramid fiber II pulp finished product.
Pulp product performance index: " Canadian standard " freedom: 255ml; Specific area: 9.5m2/g; Average fiber length: 1.23mm.
The method of testing of pulp properties of product among the present invention:
⑴ Canadian standard " freedom: measure according to GB/T12660.
⑵ dregs of rice specific area: measure according to GB/T19587.
⑶ dregs of rice average fiber length: measure according to GB/T10336.
Example 9
Get the long fine 2kg of aramid fiber III, adopt rotary cutter to cut into the short fiber of 7mm.Short fiber put into DMAC aqueous solution preliminary treatment 10min～20min of 60%.Pretreated staple fiber adding pH value is 9 the aqueous solution, adds dispersant NNO 5g simultaneously, forms the suspension dispersion, discongests by disc mill, obtains pulp suspension behind the defibrination.Washing is filtered, and the pulp that obtains after the drying carries out shredding through airslide disintegrating mill to be handled, and obtains aramid fiber III pulp finished product.
Pulp product performance index: " Canadian standard " freedom: 410ml; Specific area: 6.5m2/g; Average fiber length: 1.05mm.
Example 10
Get the long fine 2kg of pbo fiber, adopt rotary cutter to cut into the short fiber of 8mm.Short fiber put into MeOH aqueous solution preliminary treatment 10min～20min of 60%.Pretreated staple fiber adding pH value is 12 the aqueous solution, adds Dispersant MF 3g simultaneously, forms the suspension dispersion, discongests by three grades of disc mills, obtains pulp suspension behind the defibrination.Washing is filtered, and the pulp that obtains after the drying carries out shredding through airslide disintegrating mill to be handled, and obtains PBO pulp finished product.
Pulp product performance index: " Canadian standard " freedom: 320ml; Specific area: 7.6m2/g; Average fiber length: 1.12mm.
Washing among the present invention is filtered, and dry technological parameter can be same as the prior art.When forming the dispersion of staple fiber, can earlier staple fiber be added in the aqueous solution, add dispersant again, also can add dispersant earlier, add staple fiber again, can also add simultaneously, and the percentage that relates to does not have the mass percent that is of specified otherwise.
Obviously; those of ordinary skill in the art is according to technological know-how of being grasped and customary means; according to above said content, can also make the various ways that does not break away from basic technical scheme of the present invention, these pro forma conversion are all within protection scope of the present invention.
Claims (10)
1. the continuous preparation method of an organic fiber pulp is characterized in that, comprises the steps:
A, with the continuously short staple fiber that obtains 2-20mm of cutting of long fiber;
B, with staple fiber preliminary treatment 10min-20min in pretreating agent;
C, pretreated staple fiber is dispersed in the aqueous solution, the content that forms staple fiber is 0.1%-6% dispersion, and staple fiber is carried out fibrillation handle;
D, the staple fiber washing after fibrillation handled are filtered, and make pulp after the drying.
2. the continuous preparation method of organic fiber pulp according to claim 1 is characterized in that: in the described a step, adopt rotary cutting machine to cut long fiber is short continuously.
3. the continuous preparation method of organic fiber pulp according to claim 1 and 2, it is characterized in that: in the described c step, earlier add dispersant in water, staple fiber is dispersed in the aqueous solution again, the mass percent of dispersant dosage is 0.05%-1% of a staple fiber dry weight.
4. the continuous preparation method of organic fiber pulp according to claim 1 and 2, it is characterized in that: in the described c step, adopting disc mill that staple fiber is carried out fibrillation handles, on disc mill abrasive disc working face, have a plurality of grooves, groove is multilayer concentric circle shape and distributes around the center of abrasive disc, groove on every layer of concentric circles evenly distributes, and the abrasive disc between adjacent two grooves on the same circumference forms roll flute, and the gap between the adjacent two layers forms baffle arbitrarily.
5. the continuous preparation method of organic fiber pulp according to claim 1 and 2 is characterized in that: in the described c step, add dispersant in pH value is 9-13 the aqueous solution.
6. the continuous preparation method of organic fiber pulp according to claim 4 is characterized in that: described roll flute comprises the arcwall face part of joining the planar section that formed by the abrasive disc working face and a side and planar section opposite side and groove joining.
7. according to the continuous preparation method of claim 4 or 6 described organic fiber pulps, it is characterized in that: the diameter of described groove and abrasive disc forms 5 ℃～20 ℃ angles.
8. the continuous preparation method of organic fiber pulp according to claim 1 and 2 is characterized in that: described pretreating agent is the mixed solvent of organic polar solvent and water, and the shared mass ratio of organic solvent is 50%-80% in the mixed solvent.
9. the continuous preparation method of organic fiber pulp according to claim 1 and 2 is characterized in that: described pretreating agent is the aqueous slkali of organic polar solvent, and the content of alkali is 1%-10%.
10. the continuous preparation method of organic fiber pulp according to claim 1 and 2 is characterized in that: suppress the step of packing after also comprising the pulp shredding that will make.
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| CN103437233A (en) * | 2013-09-11 | 2013-12-11 | 顾德芹 | Polyacrylonitrile pulp type fibers as well as preparation method thereof |
| CN105220262A (en) * | 2015-08-24 | 2016-01-06 | 江苏先诺新材料科技有限公司 | A kind of polyimides (PI) pulp and preparation method thereof |
| 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 |
| CN113502685A (en) * | 2021-06-23 | 2021-10-15 | 华南理工大学 | Polyacrylonitrile pulp, preparation method thereof and application thereof in preparation of carbon rod filter element |
| CN113680116A (en) * | 2021-09-01 | 2021-11-23 | 安德里茨（中国）有限公司 | Sieve plate and pulp screen |
| CN115895252A (en) * | 2022-12-29 | 2023-04-04 | 烟台泰和兴材料科技股份有限公司 | Aramid fiber pulp, preparation method and application thereof |
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| CN103437233A (en) * | 2013-09-11 | 2013-12-11 | 顾德芹 | Polyacrylonitrile pulp type fibers as well as preparation method thereof |
| CN103437233B (en) * | 2013-09-11 | 2016-10-05 | 顾德芹 | A kind of polyacryl-nitrile dissolving pulp-like fibre and preparation method thereof |
| CN105220262A (en) * | 2015-08-24 | 2016-01-06 | 江苏先诺新材料科技有限公司 | A kind of polyimides (PI) pulp and preparation method thereof |
| CN105220262B (en) * | 2015-08-24 | 2019-11-08 | 江苏先诺新材料科技有限公司 | A kind of polyimides (PI) pulp and preparation method thereof |
| 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 |
| CN113502685A (en) * | 2021-06-23 | 2021-10-15 | 华南理工大学 | Polyacrylonitrile pulp, preparation method thereof and application thereof in preparation of carbon rod filter element |
| CN113502685B (en) * | 2021-06-23 | 2022-08-16 | 华南理工大学 | Polyacrylonitrile pulp, preparation method thereof and application thereof in preparation of carbon rod filter element |
| CN113680116A (en) * | 2021-09-01 | 2021-11-23 | 安德里茨（中国）有限公司 | Sieve plate and pulp screen |
| CN115895252A (en) * | 2022-12-29 | 2023-04-04 | 烟台泰和兴材料科技股份有限公司 | Aramid fiber pulp, preparation method and application thereof |
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| CN102154912B (en) | 2012-07-11 |
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