CN102953292A - Method for adding surfactant and preparing fluffy para-aramid pulp - Google Patents
Method for adding surfactant and preparing fluffy para-aramid pulp Download PDFInfo
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- CN102953292A CN102953292A CN2011102370442A CN201110237044A CN102953292A CN 102953292 A CN102953292 A CN 102953292A CN 2011102370442 A CN2011102370442 A CN 2011102370442A CN 201110237044 A CN201110237044 A CN 201110237044A CN 102953292 A CN102953292 A CN 102953292A
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Abstract
The invention discloses a method for adding a surfactant and for preparing a fluffy para-aramid pulp. According to the invention, para-aramid chopped fiber and/or para-aramid waste filament chopped fiber is adopted as a raw material, and beater direct beating or pulp grinding machine grinding is carried out, such that aramid pulp is prepared. In a later-phase of beating or grinding, the surfactant accounting for 0.5-20% by mass of the pulp is added into the pulp; the mixture is mixed and subjected to a reaction for 1-30min; and the pulp is dehydrated and dried, such that para-aramid pulp with a fiber loose bulk density smaller than 50kg/m<3> is obtained. The pulp has excellent performance, and is ultra-fluffy, soft, and easy to disperse. The para-aramid pulp has good interface properties and processing performances. The method provided by the invention has the characteristics of reduced operation steps, reduced equipment investment, improved production efficiency, reduced energy consumption, and reduced dust pollution.
Description
Technical field
The invention belongs to polymeric material field, be specifically related to a kind of method for preparing fluffy PPTA-pulp.
Background technology
P-aramid fiber (PPTA) is a kind of have high strength and modulus and stable on heating macromolecular fibre, and the sixties in 20th century is by du pont company invention and invested in plant.PPTA-pulp (PPTA-Pulp) is PPTA fiber differentiated product newly developed over nearly 30 years, it is the PPTA product of fibrillation of early 1980s a kind of high dispersion of at first developing of du pont company, it has stronger composite effect when having kept PPTA fiber excellent mechanical properties.Be widely used in the high-tech industry fields such as asbestos-free friction material, encapsulant, reinforced plastics and high-performance engineering paper (paper honeycomb structure material) as the asbestos substitute.
One of production method of the PPTA-pulp of selling on the domestic market is that the para-aramid fiber tow or the aramid fiber waste silk fiber that adopt the aramid fiber polymeric compound fiber spinning from crystalline state to be shaped are raw material, again it is cut into staple fiber, then adopt making beating or disc mill grinding method to prepare Fanglun slurry cake.After making beating or defibrination processing, p-aramid fiber staple fiber generation swollen, fibrillation produce wire-dividing broom purification, and specific area increases, and more amido link is exposed.Because amido link is easy to form hydrogen bond, in preparation PPTA-pulp process, para-aramid fiber through making beating has more amido link to expose, in situation about dehydrating, be easy to form Hydrogenbond, make the very strong adhesion of generation between the fiber, dried pulp product caking, hardening, namely produce so-called " keratinization " phenomenon, as not carrying out further shredding and the processing of dissociating, then can not get to be used for friction material, encapsulant, reinforced plastics, having of prepare composite is fluffy, soft, fine hair aspect and the PPTA-pulp product that is easy to disperse.And the beating degree of pulp is higher, and the wire-dividing broom purification degree of fiber is then higher, and the hydrogen bond that the drying and dehydrating process forms is also more, and dry rear product lumps, sclerosis is just more serious.In order to address this problem, the at present domestic technology that generally adopts is to add one section shredding operation after the PPTA-pulp drying again.Such as China Patent Publication No. CN101550613, report a kind of manufacturing pulp with non-pollution waste aramid material technique, the technique of employing is: waste aramid material is made pulp through operations such as cut-out, beating, grinding, dehydration, drying, shreddings; China Patent Publication No. CN101457405 reports a kind of preparation method and product of PPTA-pulp, and its method is: the p-aramid fiber staple fiber through disc mill discongest, cut-out, brooming, dehydration, drying, fibre separating machine are loose etc., and operation is made pulp; China Patent Publication No. CN101250771 reports a kind of method of producing Fanglun slurry cake by waste aramid material, and waste aramid material is made pulp through operations such as chopping, making beating, grinding, beating, brooming, dehydration, drying, shreddings.All behind drying process, adopted the shredding operation to prepare PPTA-pulp in the above-mentioned patent.Need special-purpose shredding equipment during shredding, not only increased equipment investment, and the shredding process is easy to produce the problems such as flyings and dust pollution.
At present domestic have a bibliographical information (China Patent Publication No. CN101550613 for preparing pulp take p-aramid fiber staple fiber or p-aramid fiber waste material as raw material through making beating or refining process; CN101457405; CN101250771; CN101058895; Paper and papermaking, 2008, (3): 45-47; 3rd International symposium on emerging technologies of pulping and papermaking.Research progress in pulping and papermaking, 8-10 Oct. Guangzhou, 2006:570-574.), do not add surfactant but mention in making beating or defibrination later stage.External also have the fiber of making take para-aramid fiber or the spinning of p-aramid fiber polymer as raw material, prepare the patent literature (US20070137818A1 of pulp through making beating or refining process, US20050287344A1, US20050284595A1, WO2002070796A1, EP392559A2, US4836507, but also do not mention in making beating or defibrination later stage and add nonionic or siliceous cationic surfactant JP08337920A).Therefore be showed no both at home and abroad at present take p-aramid fiber staple fiber or p-aramid fiber waste silk chopped fiber as raw material, add nonionic polyethenoxy ether class or cationic silicone surfactant in making beating or defibrination later stage, dry behind the de-watering of slurries, need or not discongest the directly bibliographical information of the fluffy PPTA-pulp of preparation of operation through shredding.
Sign for the pulp performance can adopt the indexs such as beating degree, specific area, water retention value, brooming rate, but these indexs can't characterize the shredding degree.In the present invention, for shredding degree and the fluffy effect of PPTA-pulp product, we have introduced fiber loose bulk density (claiming again the fiber coefficient of volumetric expansion, hereinafter to be referred as bulk density) and have estimated.Fiber accumulations density means without compacting, fiber and is loose shape, freely is filled in a certain container, is just filling afterwards without the measured unit volume quality of jolt ramming.This value can reflect the three dimensions of fiber and the separation degree of fiber indirectly, and can characterize quantitatively bulkiness and the shredding effect of PPTA-pulp: bulk density is less, and the shredding effect is better, and pulp is more fluffy.The bulk density of the PPTA-pulp product for preparing with import or all kinds of staple fiber raw materials of domestic p-aramid fiber on the domestic market is less than 50kg/m
3, be 25 ° of SR such as certain import friction material with the beating degree of PPTA-pulp, moisture is 8%, bulk density is 33.9kg/m
3The beating degree of domestic certain commercially available PPTA-pulp product is 18 ° of SR, and moisture is 7.5%, and bulk density is 44.5kg/m
3
Summary of the invention
The present invention produces the technical problem of " keratinization " and lump in dehydrating process in order to solve PPTA-pulp, a kind of method that surfactant prepares fluffy PPTA-pulp of adding is provided, the method need not the shredding operation, so that the PPTA-pulp of preparation is fluffy, soft, can improve the pulp interface performance simultaneously.This PPTA-pulp can be used for friction material, encapsulant, prepare composite.
The present invention adopts and is different from the mechanical shredding equipment of general employing by shredding, discongesting operation prepares fluffy, soft, the method of disperseing PPTA-pulp, but utilize active group and the hydrophobic effect of surfactant, pass through to add nonionic polyethenoxy ether class or cationic silicone surfactant in the later stage of making beating or defibrination, make the amido link of PPTA-pulp can't form hydrogen bond in dry run, make simultaneously hydrophobic grouping be arranged in fiber surface, increase the flatness of fiber, thereby solve the caking in the PPTA-pulp drying and dehydrating process, sclerosis problem, slurry need not the shredding processing and can directly prepare fluffy after dehydrating, soft, fully without the PPTA-pulp product that lumps.
Purpose of the present invention can reach by following measures:
A kind ofly add the method that surfactant prepares fluffy PPTA-pulp, comprise take the p-aramid fiber staple fiber or/and the p-aramid fiber waste silk chopped fiber as raw material, the employing beater is directly pulled an oar or is processed the preparation Fanglun slurry cake with paste mill grinding, wherein: in the later stage of described making beating or defibrination, add surfactant and the hybrid reaction 1～30min of stock quality 0.5～20% in the slurry, dry behind the de-watering of slurries (need or not discongest operation through shredding after the drying) directly obtains bulk density less than 50kg/m
3PPTA-pulp super fluffy, soft and that easily disperse.
The beating degree of making beating or defibrination is controlled at 15～45 ° of SR among the present invention.The making beating of indication of the present invention or the later stage of defibrination refer to pull an oar or the beating degree of defibrination during to 15～45 ° of SR requiring.
After adding surfactant in the slurry, the cutter spacing of beater transferred to discongests the position, utilize beater discongest and immixture makes surfactant and slurry mix that also reagentia is complete.Wherein the addition of surfactant is 0.50～20% of stock quality, and is preferred 1～10%, and the reaction time after the adding is 1～30min.
Surfactant of the present invention is preferably nonionic polyethenoxy ether class or cationic silicone surfactant, and other surfactants are difficult to reach effect of the present invention.Wherein the lipophilic group of nonionic polyethenoxy ether class surfactant is selected from one or more in higher aliphatic, isomery alcohol, alkyl phenol or the polyol ester, and its hydrophilic group is epoxy vinyl; Nonionic polyethenoxy ether class surfactant is preferably fatty alcohol-polyoxyethylene ether.Wherein cationic silicone surfactant is the cationic silicone surfactant of siliceous quaternary ammonium salt, and its structure is as follows:
R wherein
1, R
2Or R
3Be alkyl, alkoxyl, aryl, aralkyl or organosilicon independently respectively, R
1, R
2And R
3Total carbon atom number be 2～150; R
4, R
5Be hydrogen or C independently respectively
1～6Alkyl; R
6, R
7Or R
8Be alkyl, aryl, aralkyl, carboxyalkyl or polyoxyethylene groups, wherein R independently respectively
6, R
7And R
8Total carbon atom number 〉=12; X is halogen atom, and n is 0～5.Aforementioned aryl is preferably phenyl, tolyl or halogenophenyl.
Drying mode among the present invention is vacuumize or constant pressure and dry, and vacuum drying condition is: vacuum for-0.02MPa～-0.1MPa, 40～60 ℃ of temperature; The condition of constant pressure and dry is: normal pressure, 80 ℃～110 ℃ of temperature.
The pulp sedimentating density measuring is with reference to the assay method of dry fibreboard bulk density among the present invention, and concrete grammar is as follows: the quality (m that claims volumetric standard
1), with the dry sample process funnel (discharging opening Φ 38mm) after processing, pack into inchmeal in the container, the funnel discharging opening is 5cm apart from vessel port, treat to form on the vessel top taper, unnecessary material is struck off to two opposite directions along the vessel port center line with steel ruler, claim container and material gross mass (m
2).Bulk density (kg/m
3) be calculated as follows:
M in the formula
2---container and sample gross mass (kg);
m
1---container mass (kg);
V '
0---the volume (m of container
3), the used vessel volume of the present invention is 500mL.
With the arithmetic mean of instantaneous value of three result of the tests result as sedimentating density measuring.
Product of the present invention is PPTA-pulp, and its beating degree is 15～45 ° of SR, and dry rear pulp need or not discongested operation through shredding, has fluffy effect domestic and the commercially available PPTA-pulp product of import, and the product bulk density is 20～50kg/m
3, fluffy, soft and easily dispersion has good interfacial combined function.This PPTA-pulp product reaches the shredding effect of present commercially available prod fully, and shredding effect and the bulk density size that can regulate and control product by kind and the consumption of suitable adjustment form surface-active agent according to pulp beating degree difference.
Compared with prior art, the present invention has following features:
(1) take p-aramid fiber staple fiber or p-aramid fiber waste silk chopped fiber as raw material, add nonionic polyethenoxy ether class or cationic silicone surfactant in making beating or defibrination later stage, dry behind the de-watering of slurries, need not pass through shredding or discongest operation can be for the preparation of fluffy, the soft PPTA-pulp product of friction material, encapsulant, prepare composite, do not need to increase new equipment, can reduce equipment investment, reduce equipment flowsheet and operating procedure, enhance productivity, simultaneously capable of reducing energy consumption and dust pollution.
(2) the PPTA-pulp function admirable that makes of this law, bulk density is little, and super fluffy, soft and easily disperse, beating degree is 15～45 ° of SR, and bulk density is 20～50kg/m
3, super fluffy, soft and easily dispersion has good interfacial combined function and processing characteristics.
(3) the used surfactant of the present invention is water-soluble, hypotoxicity, environmental protection.
The specific embodiment
For further specifying the present invention, be specifically addressed in conjunction with specific embodiment once, but the embodiment that provides is provided in the present invention.
Embodiment 1
The p-aramid fiber waste silk chopped fiber is made into the fibrous suspension slurry, adopts the trough-style pulp beater making beating, the control beating degree is 20.0 ° of SR.
When reaching set beating degree, slurry adds nonionic polyethenoxy ether class surfactant, this surfactant is fatty alcohol-polyoxyethylene ether, consumption is 3% of stock quality, the beater cutter spacing is transferred to discongest the position, makes surfactant mix, react 10min with slurry.
Pulp centrifuged dehydration, in 40 ℃ ,-dry under the 0.1MPa vacuum condition, make super fluffy, soft and easily disperse PPTA-pulp.The performance indications of this PPTA-pulp product: moisture 4.98%, beating degree are 20.0 ° of SR, and bulk density is 34.0kg/m
3
Pulp centrifuged dehydration, dry under 105 ℃ of condition of normal pressure, make super fluffy, the soft and easy PPTA-pulp that disperses.The performance indications of this PPTA-pulp product: moisture 4.10%, beating degree are 20.0 ° of SR, and bulk density is 35.5kg/m
3
Embodiment 2
The p-aramid fiber waste silk chopped fiber is made into the fibrous suspension slurry, adopts the trough-style pulp beater making beating, the control beating degree is 20.0 ° of SR.
Add cationic silicone surfactant when slurry reaches set beating degree, its structure is as follows:
[(CH
3O)
3Si-Si(CH
2)
3-N
+(CH
3)
2C
18H
37]Cl
-
Consumption is 3% of stock quality, the beater cutter spacing is transferred to discongest the position, makes surfactant mix, react 10min with slurry.
Pulp centrifuged dehydration, in 40 ℃ ,-dry under the 0.08MPa vacuum condition, make super fluffy, soft and easily disperse PPTA-pulp.The performance indications of this PPTA-pulp product: moisture 3.98%, beating degree are 20.0 ° of SR, and bulk density is 34.9kg/m
3
Pulp centrifuged dehydration, dry under 105 ℃ of condition of normal pressure, make super fluffy, the soft and easy PPTA-pulp that disperses.The performance indications of this PPTA-pulp product: moisture 4.10%, beating degree are 20.0 ° of SR, and bulk density is 36.1kg/m
3
Embodiment 3
The p-aramid fiber staple fiber is made into the fibrous suspension slurry, adopts the trough-style pulp beater making beating, the control beating degree is 25 ° of SR.
When reaching set beating degree, slurry adds nonionic polyethenoxy ether class surfactant, this surfactant is fatty alcohol-polyoxyethylene ether, addition is 3% (mass fraction) of slurry, the beater cutter spacing transferred to discongest the position, make surfactant mix, react 20min with slurry.
Pulp centrifuged dehydration, dry under 105 ℃ of condition of normal pressure, make super fluffy, the soft and easy PPTA-pulp that disperses.The performance indications of this PPTA-pulp product: moisture 8%, beating degree are 25 ° of SR, and bulk density is 42.9kg/m
3
Embodiment 4
The p-aramid fiber staple fiber is made into the fibrous suspension slurry, adopts the trough-style pulp beater making beating, the control beating degree is 25 ° of SR.
When reaching set beating degree, slurry adds nonionic polyethenoxy ether class surfactant, this surfactant is fatty alcohol-polyoxyethylene ether, addition is 6% (mass fraction) of slurry, the beater cutter spacing transferred to discongest the position, make surfactant mix, react 20min with slurry.
Pulp centrifuged dehydration, dry under 105 ℃ of condition of normal pressure, make super fluffy, the soft and easy PPTA-pulp that disperses.The performance indications of this PPTA-pulp product: moisture 8%, beating degree are 25 ° of SR, and bulk density is 41.0kg/m
3
Embodiment 5
The p-aramid fiber staple fiber is made into the fibrous suspension slurry, adopts the trough-style pulp beater making beating, the control beating degree is 37.0 ° of SR.
Add cationic silicone surfactant when slurry reaches set beating degree, its structure is as follows:
[(CH
3O)
3Si-Si(CH
2)
3-N
+(CH
3)
2C
18H
37]Cl
-
Consumption is 6% of stock quality, the beater cutter spacing is transferred to discongest the position, makes surfactant mix, react 10min with slurry.
Pulp centrifuged dehydration, dry under 105 ℃ of condition of normal pressure, make super fluffy, the soft and easy PPTA-pulp that disperses.The performance indications of this PPTA-pulp product: moisture 8%, beating degree are 37.0 ° of SR, and bulk density is 45.0kg/m
3
Embodiment 6
The p-aramid fiber waste silk chopped fiber is made into the fibrous suspension slurry, adopts the trough-style pulp beater making beating, the control beating degree is 37 ° of SR.
When reaching set beating degree, slurry adds nonionic polyethenoxy ether class surfactant, this surfactant is fatty alcohol-polyoxyethylene ether, consumption is 6% of stock quality, the beater cutter spacing is transferred to discongest the position, makes surfactant mix, react 10min with slurry.
Pulp centrifuged dehydration, in 40 ℃ ,-dry under the 0.1MPa vacuum condition, make super fluffy, soft and easily disperse PPTA-pulp.The performance indications of this PPTA-pulp product: moisture 7%, beating degree are 37 ° of SR, and bulk density is 43.6kg/m
3
Embodiment 7
The p-aramid fiber waste silk chopped fiber is made into the fibrous suspension slurry, adopts the trough-style pulp beater making beating, the control beating degree is 42 ° of SR.
When reaching set beating degree, slurry adds nonionic polyethenoxy ether class surfactant, this surfactant is fatty alcohol-polyoxyethylene ether, consumption is 8% of stock quality, the beater cutter spacing is transferred to discongest the position, makes surfactant mix, react 15min with slurry.
Pulp centrifuged dehydration, in 40 ℃ ,-dry under the 0.08MPa vacuum condition, make super fluffy, soft and easily disperse PPTA-pulp.The performance indications of this PPTA-pulp product: moisture 8%, beating degree are 42 ° of SR, and bulk density is 44.4kg/m
3
Claims (10)
1. one kind is added the method that surfactant prepares fluffy PPTA-pulp, comprise take the p-aramid fiber staple fiber or/and the p-aramid fiber waste silk chopped fiber as raw material, the employing beater is directly pulled an oar or is processed the preparation Fanglun slurry cake with paste mill grinding, it is characterized in that: in the later stage of described making beating or defibrination, add surfactant and the hybrid reaction 1～30min of stock quality 0.5～20% in the slurry, dry behind the de-watering of slurries, directly obtain the fiber loose bulk density less than 50kg/m
3PPTA-pulp.
2. interpolation surfactant according to claim 1 prepares the method for fluffy PPTA-pulp, it is characterized in that: the beating degree of described making beating or defibrination is controlled at 15～45 ° of SR.
3. interpolation surfactant according to claim 1 prepares the method for fluffy PPTA-pulp, it is characterized in that: the later stage of described making beating or defibrination refers to pull an oar or the beating degree of defibrination during to 15～45 ° of SR requiring.
4. interpolation surfactant according to claim 1 prepares the method for fluffy PPTA-pulp, it is characterized in that: after adding surfactant in the slurry, the cutter spacing of beater transferred to discongests the position, utilize beater discongest and immixture mixes surfactant and slurry and reagentia is complete.
According to claim 1 or 4 described interpolation surfactants prepare the method for fluffy PPTA-pulp, it is characterized in that: described surfactant is nonionic polyethenoxy ether class or cationic silicone surfactant.
6. interpolation surfactant according to claim 5 prepares the method for fluffy PPTA-pulp, it is characterized in that: the lipophilic group of described nonionic polyethenoxy ether class surfactant is selected from one or more in higher aliphatic, isomery alcohol, alkyl phenol or the polyol ester, and its hydrophilic group is epoxy vinyl.
7. interpolation surfactant according to claim 5 prepares the method for fluffy PPTA-pulp, it is characterized in that: described cationic silicone surfactant is the cationic silicone surfactant of siliceous quaternary ammonium salt, and its structure is as follows:
R wherein
1, R
2Or R
3Be alkyl, alkoxyl, aryl, aralkyl or organosilicon independently respectively, R
1, R
2And R
3Total carbon atom number be 2～150; R
4, R
5Be hydrogen or C independently respectively
1～6Alkyl; R
6, R
7Or R
8Be alkyl, aryl, aralkyl, carboxyalkyl or polyoxyethylene groups, wherein R independently respectively
6, R
7And R
8Total carbon atom number 〉=12; X is halogen atom, and n is 0～5.
8. interpolation surfactant according to claim 6 prepares the method for fluffy PPTA-pulp, it is characterized in that: described aryl is phenyl, tolyl or halogenophenyl.
9. interpolation surfactant according to claim 1 prepares the method for fluffy PPTA-pulp, it is characterized in that: the addition of described surfactant is stock quality 1～10%.
10. interpolation surfactant according to claim 1 prepares the method for fluffy PPTA-pulp, it is characterized in that: described drying mode is vacuumize or constant pressure and dry, vacuum drying condition is: vacuum for-0.02MPa～-0.1MPa, 40～60 ℃ of temperature; The condition of constant pressure and dry is: normal pressure, 80 ℃～110 ℃ of temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102370442A CN102953292A (en) | 2011-08-17 | 2011-08-17 | Method for adding surfactant and preparing fluffy para-aramid pulp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102370442A CN102953292A (en) | 2011-08-17 | 2011-08-17 | Method for adding surfactant and preparing fluffy para-aramid pulp |
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| CN102953292A true CN102953292A (en) | 2013-03-06 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103146193A (en) * | 2013-03-27 | 2013-06-12 | 中国科学院长春应用化学研究所 | Aramid fiber dispersion liquid and dispersion method and static sealing material of aramid fiber |
| CN103485234A (en) * | 2013-10-22 | 2014-01-01 | 陕西科技大学 | Preparation method of mixed fiber system aramid paper |
| CN112143226A (en) * | 2020-10-20 | 2020-12-29 | 株洲时代新材料科技股份有限公司 | Preparation method of fibrid reinforced nylon composite material |
| 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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|---|---|---|---|---|
| JP2001303026A (en) * | 2000-04-21 | 2001-10-31 | Akebono Brake Res & Dev Center Ltd | Reinforcing fiber for friction material and method for producing the same |
| 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 |
-
2011
- 2011-08-17 CN CN2011102370442A patent/CN102953292A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001303026A (en) * | 2000-04-21 | 2001-10-31 | Akebono Brake Res & Dev Center Ltd | Reinforcing fiber for friction material and method for producing the same |
| 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 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103146193A (en) * | 2013-03-27 | 2013-06-12 | 中国科学院长春应用化学研究所 | Aramid fiber dispersion liquid and dispersion method and static sealing material of aramid fiber |
| CN103146193B (en) * | 2013-03-27 | 2015-05-13 | 中国科学院长春应用化学研究所 | Aramid fiber dispersion liquid and dispersion method and static sealing material of aramid fiber |
| CN103485234A (en) * | 2013-10-22 | 2014-01-01 | 陕西科技大学 | Preparation method of mixed fiber system aramid paper |
| CN103485234B (en) * | 2013-10-22 | 2016-04-06 | 陕西科技大学 | A kind of preparation method of blended fiber system aramid paper |
| CN112143226A (en) * | 2020-10-20 | 2020-12-29 | 株洲时代新材料科技股份有限公司 | Preparation method of fibrid reinforced nylon composite material |
| CN112143226B (en) * | 2020-10-20 | 2023-03-31 | 株洲时代新材料科技股份有限公司 | Preparation method of fibrid reinforced nylon composite material |
| 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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Application publication date: 20130306 |