CN108219190A - A kind of utilize scraps the method that bulletproof halmet prepares Fanglun slurry cake - Google Patents
A kind of utilize scraps the method that bulletproof halmet prepares Fanglun slurry cake Download PDFInfo
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- CN108219190A CN108219190A CN201711370279.2A CN201711370279A CN108219190A CN 108219190 A CN108219190 A CN 108219190A CN 201711370279 A CN201711370279 A CN 201711370279A CN 108219190 A CN108219190 A CN 108219190A
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- aramid fiber
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- fanglun slurry
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
- C08J11/08—Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/02—Recovery or working-up of waste materials of solvents, plasticisers or unreacted monomers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2377/10—Polyamides derived from aromatically bound amino and carboxyl groups of amino carboxylic acids or of polyamines and polycarboxylic acids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
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Abstract
The present invention relates to a kind of methods for preparing Fanglun slurry cake using bulletproof halmet is scrapped, and belong to technical field of polymer materials.Disintegrate the helmet first, by its cutting and grinding into strips, then peels off the resin of fiber surface attachment after soaked in solvent with ball mill, resin is then removed by way of centrifugation, and aramid fiber finally is obtained Fanglun slurry cake by discongesting mill again.Compared with the prior art, almost all has recycled the aramid fiber in the helmet to this method, has accomplished that resource most efficiently utilizes；Resin is removed using the mode that solvent swell and physical shear are combined and fiber is not only efficient, but also mild condition, and equipment is simple, convenient for large-scale production.
Description
Technical field
The present invention relates to a kind of methods for preparing Fanglun slurry cake using bulletproof halmet is scrapped, and belong to high polymer material technology neck
Domain.
Background technology
Para-aramid fiber is a kind of high performance polymer material, has high intensity, high-modulus, high temperature resistant, corrosion-resistant, resistance
A series of excellent properties such as combustion, are widely used in the fields such as military affairs, aerospace, electromechanics, building.It is prepared using p-aramid fiber
The helmet largely equips various countries' army and police's system, plays the role of to guarantee army and police personnel fighting capacity and life security very important.But
It is since para-aramid fiber and its curing materials are high molecular polymers, all there are problems that service life, expire necessary
Scrap processing.
There are one the methods that bulletproof halmet is scrapped in general ripe processing at present.From the point of view of open report, at present
Mainly using open incineration, underground landfill, the disposal options such as stack and handle the retired helmet, but these methods all exist pollution,
The problems such as wasting, be of high cost.CN201710052354.4 provides a kind of method of new processing ballistic helmets for police, using height
The helmet of macromolecule material is done harmless treatment by the method for temperature drop solution gasification.But still there is waste in this method.
Because there is the aramid fiber used in arylon helmet important recycling to be worth, the aramid fiber in arylon helmet is entire
During one's term of military service, because having solidified resin protection and outer layer sunscreen protection, significant reduced performance can't occur, if so only
It is that Pintsch process handles or can cause huge waste to resource.
It is a feasible recycling method to do pulp using the fiber for scrapping the helmet, but this method is technically
Also there is very big challenge.Aramid fiber bulletproof halmet is usually to be combined by the curings such as aramid fiber and phenolic aldehyde or epoxy resin.
Aramid fiber is recycled, aramid fiber and resin must just be efficiently separated.And it is used for the phenolic aldehyde and asphalt mixtures modified by epoxy resin of the helmet
Fat is all cross-linked structure, it is difficult to be removed it with dissolution method, is also difficult to remove resin with the method that physics crushes, to carrying tree
The further application of the Fanglun slurry cake of fat forms serious obstacle.
Invention content
The purpose of the present invention is to propose to a kind of methods for preparing Fanglun slurry cake using bulletproof halmet is scrapped, it is intended to overcome existing
Technological deficiency, so that scrapping bulletproof halmet can be effectively treated and recycle aramid fiber.
Proposed by the present invention utilize scraps the method that bulletproof halmet prepares Fanglun slurry cake, includes the following steps：
(1) disintegrate and scrap bulletproof halmet：
The protection cloth on bulletproof halmet surface and head support structure are scrapped in removal, will scrap the main part of bulletproof halmet
Strip aramid fiber/the resin complexes for being ground into 1-5cm are cut in cutting；
(2) fiber and resin are removed：
Strip aramid fiber/resin complexes of above-mentioned steps (1) are dipped into amide solvent, amount of solvent with
It submerges subject to strip aramid fiber/resin complexes, soaking time is 1-2 hours, is then added in ball mill, ball milling 5-10
Hour discharging, the aramid fiber length after ball milling are controlled within 5cm, the amide solvent is N-Methyl pyrrolidone,
N,N-dimethylformamide or DMAC N,N' dimethyl acetamide；
(3) fiber and resin are detached：
Material after above-mentioned steps (2) ball milling is poured into 2-5 times of water, is stirring evenly and then adding into strainer mesh as 50-
Carry out centrifugal treating in the centrifuge of 100 mesh, the fibre material after centrifugal treating adds water dispensing laundry again, then centrifuges again
It handles, pure aramid fiber is obtained after multiple centrifugal treating, making the solvent content in aramid fiber, resin contains less than 500ppm
Amount is less than 3%；
(4) pulp is prepared：
The para-aramid fiber that above-mentioned steps (3) isolate and purify is dispersed back into 2-5 times of water, after stirring evenly, is used
Fluffer discongests into the staple fiber of dispersion, and then with double disc refiner beating into Fanglun slurry cake aqueous dispersions, control beating degree exists
30-50 ° of SR (Xiao Baierdu), dry after being dehydrated to Fanglun slurry cake water, control drying temperature makes to do between 60-120 DEG C
The moisture content of Fanglun slurry cake after dry is 3-7wt%, using shredding mechanical treatment after Fanglun slurry cake drying, obtains fluffy drying
Fanglun slurry cake；
(5) solvent recovery：
It, will by the solid impurity in filtering and removing mixture to the mixture repeatedly centrifuged in above-mentioned steps (3)
The mode of the liquid being obtained by filtration rectification under vacuum recycles, the solvent as above-mentioned steps (2).
Proposed by the present invention utilize scraps the method that bulletproof halmet prepares Fanglun slurry cake, and tool has the advantage that：
1st, the method for the present invention almost all has recycled the aramid fiber in the helmet, can effectively recycle the higher aramid fiber of purity
Staple fiber, and pulp is further prepared into, accomplish that the most efficient of resource utilizes.
2nd, the mode that the method for the present invention is combined using solvent swell and physical shear is removed resin and fiber, is not only imitated
Rate is high, and mild condition, and equipment is simple, convenient for large-scale production.
Specific embodiment
Proposed by the present invention utilize scraps the method that bulletproof halmet prepares Fanglun slurry cake, includes the following steps：
(1) disintegrate and scrap bulletproof halmet：
The protection cloth on bulletproof halmet surface and head support structure are scrapped in removal, will scrap the main part of bulletproof halmet
Strip aramid fiber/the resin complexes for being ground into 1-5cm are cut in cutting；
(2) fiber and resin are removed：
Strip aramid fiber/resin complexes of above-mentioned steps (1) are dipped into amide solvent, amount of solvent with
It submerges subject to strip aramid fiber/resin complexes, soaking time is 1-2 hours, is then added in ball mill, ball milling 5-10
Hour discharging, the aramid fiber length after ball milling are controlled within 5cm, the amide solvent is N-Methyl pyrrolidone,
N,N-dimethylformamide or DMAC N,N' dimethyl acetamide；
(3) fiber and resin are detached：
Material after above-mentioned steps (2) ball milling is poured into 2-5 times of water, is stirring evenly and then adding into strainer mesh as 50-
Carry out centrifugal treating in the centrifuge of 100 mesh, the fibre material after centrifugal treating adds water dispensing laundry again, then centrifuges again
It handles, pure aramid fiber is obtained after multiple centrifugal treating, making the solvent content in aramid fiber, resin contains less than 500ppm
Amount is less than 3%；
(4) pulp is prepared：
The para-aramid fiber that above-mentioned steps (3) isolate and purify is dispersed back into 2-5 times of water, after stirring evenly, is used
Fluffer discongests into the staple fiber of dispersion, and then with double disc refiner beating into Fanglun slurry cake aqueous dispersions, control beating degree exists
30-50 ° of SR (Xiao Baierdu), dry after being dehydrated to Fanglun slurry cake water, control drying temperature makes to do between 60-120 DEG C
The moisture content of Fanglun slurry cake after dry is 3-7wt%, using shredding mechanical treatment after Fanglun slurry cake drying, obtains fluffy drying
Fanglun slurry cake；
(5) solvent recovery：
The mixture that will repeatedly be centrifuged in above-mentioned steps (3) contains resin, solvent, water and micro virtue in mixture
By the solid impurity in filtering and removing mixture, the mode of the liquid being obtained by filtration rectification under vacuum is recycled for synthetic fibre fiber, is made
Solvent for above-mentioned steps (2).
The present invention is further described below by example, but content not thereby limiting the invention.
Embodiment 1：
Certain retired bulletproof halmet (para-aramid fiber adds phenolic resin curing) surfacecti proteon cloth and head are supported
By the cutting and grinding of helmet body part into 1cm bars after structure removal.Then by strip aramid fiber/phenolic resin compound
2h in N-Methyl pyrrolidone is dipped into, ball milling 5h in ball mill is then added to and discharges.Aramid fiber after ball milling is averagely long
Degree is in 5cm or so.Then the material after ball milling is poured into 2 times of water, is stirring evenly and then adding into strainer as in 50 mesh centrifuges
Centrifugal treating.Pure aramid fiber is obtained after 3 circular treatments.Solvent content about 300ppm in final fiber, phenol
Urea formaldehyde content about 0.5%.Then the aramid fiber isolated and purified is dispersed back into 2 times of water, with discongesting after stirring evenly
Machine first discongests into the staple fiber of dispersion, and then with double disc refiner beating into Fanglun slurry cake aqueous dispersions, control beating degree is at 40 °
SR or so.Dry after being dehydrated to Fanglun slurry cake, control drying temperature is between 60-120 DEG C, pulp moisture content control after drying
System is in 5wt% or so.Using obtaining the Fanglun slurry cake of fluffy drying after shredding mechanical treatment after pulp drying.By what is be centrifuged out
Mixture (containing phenolic resin, N-Methyl pyrrolidone, water and micro aramid fiber) is by filtering and removing solid impurity, by liquid
With the mode recycling design of rectification under vacuum.
Embodiment 2：
Certain retired bulletproof halmet (para-aramid fiber adds phenolic resin curing) surfacecti proteon cloth and head are supported
By the cutting and grinding of helmet body part into 5cm bars after structure removal.Then by strip aramid fiber/phenolic resin compound
2h in n,N-Dimethylformamide is dipped into, ball milling 10h in ball mill is then added to and discharges.Aramid fiber after ball milling is averaged
Length is in 3cm or so.Then the material after ball milling is poured into 5 times of water, is stirring evenly and then adding into strainer as 80 mesh centrifuges
Middle centrifugal treating.Pure aramid fiber is obtained after 5 circular treatments.Solvent content about 400ppm in final fiber,
Phenolic resin content about 1.5%.Then the aramid fiber isolated and purified is dispersed back into 2 times of water, with thin after stirring evenly
Solution machine first discongests into the staple fiber of dispersion, and then with double disc refiner beating into Fanglun slurry cake aqueous dispersions, control beating degree exists
30 ° of SR or so.Dry after being dehydrated to Fanglun slurry cake, control drying temperature is between 60-120 DEG C, and pulp is aqueous after drying
Rate is controlled in 7wt% or so.Using obtaining the Fanglun slurry cake of fluffy drying after shredding mechanical treatment after pulp drying.It will centrifugation
The mixture (containing phenolic resin, n,N-Dimethylformamide, water and micro aramid fiber) gone out by filtering and removing solid impurity,
By the mode recycling design of liquid rectification under vacuum.
Embodiment 3：
Certain retired bulletproof halmet (para-aramid fiber adds phenolic resin curing) surfacecti proteon cloth and head are supported
By the cutting and grinding of helmet body part into 3cm bars after structure removal.Then by strip aramid fiber/phenolic resin compound
1h in n,N-dimethylacetamide is dipped into, ball milling 6h in ball mill is then added to and discharges.Aramid fiber after ball milling is averaged
Length is in 4cm or so.Then the material after ball milling is poured into 3 times of water, is stirring evenly and then adding into strainer as 80 mesh centrifuges
Middle centrifugal treating.Pure aramid fiber is obtained after 5 circular treatments.Solvent content about 200ppm in final fiber,
Phenolic resin content about 1%.Then the aramid fiber isolated and purified is dispersed back into 5 times of water, with discongesting after stirring evenly
Machine first discongests into the staple fiber of dispersion, and then with double disc refiner beating into Fanglun slurry cake aqueous dispersions, control beating degree is at 50 °
SR or so.Dry after being dehydrated to Fanglun slurry cake, control drying temperature is between 60-120 DEG C, pulp moisture content control after drying
System is in 7wt% or so.Using obtaining the Fanglun slurry cake of fluffy drying after shredding mechanical treatment after pulp drying.By what is be centrifuged out
Mixture (containing phenolic resin, n,N-dimethylacetamide, water and micro aramid fiber) is by filtering and removing solid impurity, by liquid
The mode recycling design of body rectification under vacuum.
Embodiment 4：
Certain retired bulletproof halmet (para-aramid fiber adds epoxy resin cure) surfacecti proteon cloth and head are supported
By the cutting and grinding of helmet body part into 4cm bars after structure removal.Then by strip aramid fiber/epoxy resin composite
2h in N-Methyl pyrrolidone is dipped into, ball milling 5h in ball mill is then added to and discharges.Aramid fiber after ball milling is averagely long
Degree is in 4cm or so.Then the material after ball milling is poured into 5 times of water, is stirring evenly and then adding into strainer as in 50 mesh centrifuges
Centrifugal treating.Pure aramid fiber is obtained after 3 circular treatments.Solvent content about 400ppm in final fiber, ring
Oxygen resin content about 0.5%.Then the aramid fiber isolated and purified is dispersed back into 3 times of water, with discongesting after stirring evenly
Machine first discongests into the staple fiber of dispersion, and then with double disc refiner beating into Fanglun slurry cake aqueous dispersions, control beating degree is at 35 °
SR or so.Dry after being dehydrated to Fanglun slurry cake, control drying temperature is between 60-120 DEG C, pulp moisture content control after drying
System is in 4wt% or so.Using obtaining the Fanglun slurry cake of fluffy drying after shredding mechanical treatment after pulp drying.By what is be centrifuged out
Mixture (containing epoxy resin, N-Methyl pyrrolidone, water and micro aramid fiber) is by filtering and removing solid impurity, by liquid
With the mode recycling design of rectification under vacuum.
Embodiment 5：
Certain retired bulletproof halmet (para-aramid fiber adds epoxy resin cure) surfacecti proteon cloth and head are supported
By the cutting and grinding of helmet body part into 3cm bars after structure removal.Then by strip aramid fiber/epoxy resin composite
1h in n,N-Dimethylformamide is dipped into, ball milling 6h in ball mill is then added to and discharges.Aramid fiber after ball milling is averaged
Length is in 3cm or so.Then the material after ball milling is poured into 3 times of water, is stirring evenly and then adding into strainer as 80 mesh centrifuges
Middle centrifugal treating.Pure aramid fiber is obtained after 5 circular treatments.Solvent content about 200ppm in final fiber,
Epoxy resin content about 0.5%.Then the aramid fiber isolated and purified is dispersed back into 2 times of water, with thin after stirring evenly
Solution machine first discongests into the staple fiber of dispersion, and then with double disc refiner beating into Fanglun slurry cake aqueous dispersions, control beating degree exists
45 ° of SR or so.Dry after being dehydrated to Fanglun slurry cake, control drying temperature is between 60-120 DEG C, and pulp is aqueous after drying
Rate is controlled in 6wt% or so.Using obtaining the Fanglun slurry cake of fluffy drying after shredding mechanical treatment after pulp drying.It will centrifugation
The mixture (containing epoxy resin, n,N-Dimethylformamide, water and micro aramid fiber) gone out by filtering and removing solid impurity,
By the mode recycling design of liquid rectification under vacuum.
Embodiment 6：
Certain retired bulletproof halmet (para-aramid fiber adds epoxy resin cure) surfacecti proteon cloth and head are supported
By the cutting and grinding of helmet body part into 1cm bars after structure removal.Then by strip aramid fiber/epoxy resin composite
1h in n,N-dimethylacetamide is dipped into, ball milling 5h in ball mill is then added to and discharges.Aramid fiber after ball milling is averaged
Length is in 2cm or so.Then the material after ball milling is poured into 2 times of water, is stirring evenly and then adding into strainer as 80 mesh centrifuges
Middle centrifugal treating.Pure aramid fiber is obtained after 3 circular treatments.Solvent content about 200ppm in final fiber,
Epoxy resin content about 0.5%.Then the aramid fiber isolated and purified is dispersed back into 5 times of water, with thin after stirring evenly
Solution machine first discongests into the staple fiber of dispersion, and then with double disc refiner beating into Fanglun slurry cake aqueous dispersions, control beating degree exists
40 ° of SR or so.Dry after being dehydrated to Fanglun slurry cake, control drying temperature is between 60-120 DEG C, and pulp is aqueous after drying
Rate is controlled in 6wt% or so.Using obtaining the Fanglun slurry cake of fluffy drying after shredding mechanical treatment after pulp drying.It will centrifugation
The mixture (containing epoxy resin, n,N-dimethylacetamide, water and micro aramid fiber) gone out by filtering and removing solid impurity,
By the mode recycling design of liquid rectification under vacuum.
Claims (1)
1. a kind of utilize scraps the method that bulletproof halmet prepares Fanglun slurry cake, it is characterised in that this method includes the following steps：
(1) disintegrate and scrap bulletproof halmet：
The protection cloth on bulletproof halmet surface and head support structure are scrapped in removal, and the main part for scrapping bulletproof halmet is cut
Cut the strip aramid fiber/resin complexes for being ground into 1-5cm；
(2) fiber and resin are removed：
Strip aramid fiber/resin complexes of above-mentioned steps (1) are dipped into amide solvent, amount of solvent is to submerge
Subject to strip aramid fiber/resin complexes, soaking time is 1-2 hours, is then added in ball mill, ball milling 5-10 hours
It discharges, the aramid fiber length after ball milling is controlled within 5cm, and the amide solvent is N-Methyl pyrrolidone, N, N-
Dimethylformamide or DMAC N,N' dimethyl acetamide；
(3) fiber and resin are detached：
Material after above-mentioned steps (2) ball milling is poured into 2-5 times of water, is stirring evenly and then adding into strainer mesh as 50-100 mesh
Centrifuge in carry out centrifugal treating, the fibre material after centrifugal treating adds water dispensing laundry again, then centrifugal treating again,
Pure aramid fiber is obtained after multiple centrifugal treating, the solvent content in aramid fiber is made to be less than 500ppm, resin content is low
In 3%；
(4) pulp is prepared：
The para-aramid fiber that above-mentioned steps (3) isolate and purify is dispersed back into 2-5 times of water, after stirring evenly, with discongesting
Machine discongests into the staple fiber of dispersion, and then with double disc refiner beating into Fanglun slurry cake aqueous dispersions, control beating degree is in 30-
50 ° of SR, dry after being dehydrated to Fanglun slurry cake water, control drying temperature starches dried aramid fiber between 60-120 DEG C
The moisture content of the dregs of rice is 3-7wt%, using shredding mechanical treatment after Fanglun slurry cake drying, obtains the Fanglun slurry cake of fluffy drying；
(5) solvent recovery：
To the mixture repeatedly centrifuged in above-mentioned steps (3), by the solid impurity in filtering and removing mixture, will filter
The mode of obtained liquid rectification under vacuum recycles, the solvent as above-mentioned steps (2).
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| CN201711370279.2A CN108219190B (en) | 2017-12-19 | 2017-12-19 | Method for preparing aramid pulp by using scrapped bulletproof helmet |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711370279.2A CN108219190B (en) | 2017-12-19 | 2017-12-19 | Method for preparing aramid pulp by using scrapped bulletproof helmet |
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| CN108219190B CN108219190B (en) | 2020-07-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110760096A (en) * | 2019-10-29 | 2020-02-07 | 中国科学院山西煤炭化学研究所 | Method for dissolving para-aramid in waste bulletproof clothes |
| CN113635629A (en) * | 2021-09-17 | 2021-11-12 | 公安部第一研究所 | Safety shoe toe cap processed by utilizing scrapped armors |
| CN114226409A (en) * | 2021-12-08 | 2022-03-25 | 江苏安卡新材料科技有限公司 | Fiber recovery process |
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| CN101250771A (en) * | 2008-04-01 | 2008-08-27 | 上海依极科技有限公司 | Method for producing aramid fiber pulp by aramid fiber waste material |
| CN102391543A (en) * | 2011-09-02 | 2012-03-28 | 中国科学院宁波材料技术与工程研究所 | Method for recovering carbon-fiber enhanced epoxy resin composite material |
| WO2017021574A1 (en) * | 2015-08-06 | 2017-02-09 | Universidad De Alicante | Method for recovering inorganic fibres at room temperature in composite materials of fibre and resin |
| CN107082584A (en) * | 2016-02-15 | 2017-08-22 | 山东理工大学 | A kind of carbon fibre reinforced composite castoff regenerative carbon fiber method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1456719A (en) * | 2003-06-05 | 2003-11-19 | 上海依极科技有限公司 | Production of aromatic copolymide fiber dissolving pulp |
| CN101250771A (en) * | 2008-04-01 | 2008-08-27 | 上海依极科技有限公司 | Method for producing aramid fiber pulp by aramid fiber waste material |
| CN102391543A (en) * | 2011-09-02 | 2012-03-28 | 中国科学院宁波材料技术与工程研究所 | Method for recovering carbon-fiber enhanced epoxy resin composite material |
| WO2017021574A1 (en) * | 2015-08-06 | 2017-02-09 | Universidad De Alicante | Method for recovering inorganic fibres at room temperature in composite materials of fibre and resin |
| CN107082584A (en) * | 2016-02-15 | 2017-08-22 | 山东理工大学 | A kind of carbon fibre reinforced composite castoff regenerative carbon fiber method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110760096A (en) * | 2019-10-29 | 2020-02-07 | 中国科学院山西煤炭化学研究所 | Method for dissolving para-aramid in waste bulletproof clothes |
| CN113635629A (en) * | 2021-09-17 | 2021-11-12 | 公安部第一研究所 | Safety shoe toe cap processed by utilizing scrapped armors |
| CN114226409A (en) * | 2021-12-08 | 2022-03-25 | 江苏安卡新材料科技有限公司 | Fiber recovery process |
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| Publication number | Publication date |
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| CN108219190B (en) | 2020-07-03 |
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