CN112853534A - Process for manufacturing regenerated nylon 6 fiber - Google Patents
Process for manufacturing regenerated nylon 6 fiber Download PDFInfo
- Publication number
- CN112853534A CN112853534A CN202110026882.9A CN202110026882A CN112853534A CN 112853534 A CN112853534 A CN 112853534A CN 202110026882 A CN202110026882 A CN 202110026882A CN 112853534 A CN112853534 A CN 112853534A
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- Prior art keywords
- nylon
- fiber
- regenerated
- waste
- temperature
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/90—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyamides
-
- 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
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/16—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with inorganic material
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- 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
- C08J2377/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention relates to a fiber manufacturing process, in particular to a manufacturing process of regenerated nylon 6 fibers, which comprises the following steps: step one, crushing nylon 6 waste; adding a catalyst and a mixed solvent of ethanol and dichloroethane; step three, filtering undissolved solids in the solution after the dissolution is finished; step four, cooling and crystallizing the nylon 6 in the filtered solution at a certain temperature to obtain a nylon 6 solid; step five, drying the nylon 6 solid in an oven at the temperature of 100-120 ℃ for 3-4h to ensure that the water content is less than 5%; step six, adding an additive to obtain a mixture; and seventhly, carrying out melt spinning to obtain the regenerated nylon 6 fiber. The invention adopts the nylon 6 waste material to prepare the regenerated nylon 6 fiber, thereby realizing the recycling of the nylon 6 waste material and fully avoiding the waste of resources and the pollution of the environment.
Description
Technical Field
The invention relates to a fiber manufacturing process, in particular to a manufacturing process of regenerated nylon 6 fiber.
Background
The nylon 6 inevitably generates a large amount of leftover materials and waste materials in the production process, the leftover materials and the waste materials contain a plurality of additives which are difficult to separate, and the waste materials are generally used as fuels at present, so that the waste of resources and the pollution of the environment are caused, and a method for recycling the nylon 6 is needed.
In the prior art, a regeneration method of nylon 6 waste is provided, but nylon 6 is difficult to dissolve in a common dissolving solution, so that the difficulty in purifying nylon 6 from the waste is high.
Disclosure of Invention
The invention provides a manufacturing process of regenerated nylon 6 fibers, aiming at the problems existing in the prior art about the manufacturing of the regenerated nylon 6 fibers.
In order to solve the technical problem, the invention is solved by the following technical scheme:
a process for making regenerated nylon 6 fiber comprising the steps of:
step one, crushing nylon 6 waste;
step two, adding a catalyst and a mixed solvent of ethanol and dichloroethane into a closed stirring container, and stirring and dissolving for 4-5 hours at the temperature of 100-150 ℃;
step three, filtering undissolved solids in the solution after the dissolution is finished;
step four, cooling and crystallizing the nylon 6 in the filtered solution at a certain temperature to obtain a nylon 6 solid;
step five, drying the nylon 6 solid in an oven at the temperature of 100-120 ℃ for 3-4h to ensure that the water content is less than 5%;
step six, adding a plasticizer, an antioxidant, a lubricant, a heat stabilizer, an anti-hydrolysis agent, a nucleating agent and a chain extender into the dried nylon 6 solid to obtain a mixture;
various additives are added into the nylon 6 solid, so that the performance of the nylon 6 solid can be effectively improved, and the nylon 6 fiber with better performance is obtained.
And step seven, carrying out melt spinning on the mixture obtained in the step six to obtain the regenerated nylon 6 fiber.
Preferably, the mass ratio of the catalyst to the nylon 6 waste in the second step is 0.2-0.4%.
Preferably, the catalyst in step two is a mixture of 30% sodium chloride and 70% ferric chloride.
The catalyst adopts a mixture of sodium chloride and ferric chloride, wherein the sodium chloride is used as a polar reagent, so that a polar condition can be provided for the reaction, and the time required by the reaction is greatly shortened; ferric chloride is a strong acidic aqueous solution that can increase the degree of decomposition of nylon 6 waste.
Preferably, the mass ratio of the mixed solvent to the nylon 6 waste in the step two is 1: 1.
preferably, the mixed solvent in the second step is a mixture of 60% ethanol and 40% dichloroethane.
The ethanol and the dichloroethane are used as solvents, so that the nylon 6 in the nylon 6 waste can be dissolved to a greater extent.
Preferably, in the fourth step, the nylon 6 is placed in a crystallization kettle for crystallization, and the temperature in the crystallization kettle is 35-45 ℃.
Preferably, the melt spinning process in the seventh step adopts a linear spinneret and the melting temperature is 280 ℃.
Due to the adoption of the technical scheme, the invention has the remarkable technical effects that:
the invention adopts the nylon 6 waste material to prepare the regenerated nylon 6 fiber, thereby realizing the recycling of the nylon 6 waste material and fully avoiding the waste of resources and the pollution of the environment.
Detailed Description
Example 1
A process for making regenerated nylon 6 fiber comprising the steps of:
step one, crushing nylon 6 waste;
step two, adding a catalyst and a mixed solvent of ethanol and dichloroethane into a closed stirring container, and stirring and dissolving for 4 hours at the temperature of 100 ℃;
wherein the catalyst is a mixture of 30% of sodium chloride and 70% of ferric chloride, and the mass ratio of the catalyst to the nylon 6 waste material in the embodiment is 0.2%.
In addition, in the present embodiment, the mixed solvent is a mixture of 60% ethanol and 40% dichloroethane, and the mass ratio of the mixed solvent to the nylon 6 waste is 1: 1.
through the mixed catalyst that sodium chloride and ferric chloride constitute in this embodiment, reuse the mixed solvent that ethanol and dichloroethane constitute and realize dissolving nylon 6 waste material, it dissolves fully, can carry out greater degree with nylon 6 waste material and dissolve, and the waste water discharge after dissolving is very few, can effectively avoid the secondary pollution to the environment.
Step three, filtering undissolved solids in the solution after the dissolution is finished;
step four, placing the nylon 6 in the filtered solution in a crystallization kettle for crystallization at a certain temperature, wherein the temperature in the crystallization kettle is 35 ℃, and cooling and crystallizing to obtain a nylon 6 solid;
in the embodiment, the nylon 6 waste is well dissolved by adopting the special catalyst and the special solvent, part of undissolved solids are filtered, and then the dissolved solution is crystallized to obtain the nylon 6 solids.
Step five, drying the nylon 6 solid in an oven at 100 ℃ for 3 hours to ensure that the water content is less than 5%;
step six, adding a plasticizer, an antioxidant, a lubricant, a heat stabilizer, an anti-hydrolysis agent, a nucleating agent and a chain extender into the dried nylon 6 solid to obtain a mixture;
in the embodiment, various additives are added to the nylon 6 solid, so that the finally prepared regenerated nylon 6 fiber has good thermal stability and hydrolysis resistance, and good oxidation resistance, and the condition of poor performance of the final product caused by poor material fluidity or incompliance under high-temperature processing conditions can be overcome.
And seventhly, performing melt spinning on the mixture in the step six by using a linear spinneret plate at 280 ℃ to obtain the regenerated nylon 6 fiber.
The regenerated nylon 6 fiber finally prepared in the embodiment has good wear resistance, heat resistance, oil resistance and chemical resistance, greatly reduces the water absorption rate and shrinkage rate of raw materials, and has excellent dimensional stability and excellent mechanical strength.
Example 2
A process for making regenerated nylon 6 fiber comprising the steps of:
step one, crushing nylon 6 waste;
step two, adding a catalyst and a mixed solvent of ethanol and dichloroethane into a closed stirring container, and stirring and dissolving for 5 hours at the temperature of 150 ℃;
wherein the catalyst is a mixture of 30% of sodium chloride and 70% of ferric chloride, and the mass ratio of the catalyst to the nylon 6 waste material in the embodiment is 0.4%.
In addition, in the present embodiment, the mixed solvent is a mixture of 60% ethanol and 40% dichloroethane, and the mass ratio of the mixed solvent to the nylon 6 waste is 1: 1.
step three, filtering undissolved solids in the solution after the dissolution is finished;
step four, placing the nylon 6 in the filtered solution in a crystallization kettle for crystallization at a certain temperature, wherein the temperature in the crystallization kettle is 45 ℃, and cooling and crystallizing to obtain a nylon 6 solid;
step five, drying the nylon 6 solid in an oven at the temperature of 100-;
step six, adding a plasticizer, an antioxidant, a lubricant, a heat stabilizer, an anti-hydrolysis agent, a nucleating agent and a chain extender into the dried nylon 6 solid to obtain a mixture;
and seventhly, performing melt spinning on the mixture in the step six by using a linear spinneret plate at 280 ℃ to obtain the regenerated nylon 6 fiber.
In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.
Claims (7)
1. The manufacturing process of the regenerated nylon 6 fiber is characterized by comprising the following steps:
step one, crushing nylon 6 waste;
step two, adding a catalyst and a mixed solvent of ethanol and dichloroethane into a closed stirring container, and stirring and dissolving for 4-5 hours at the temperature of 100-150 ℃;
step three, filtering undissolved solids in the solution after the dissolution is finished;
step four, cooling and crystallizing the nylon 6 in the filtered solution at a certain temperature to obtain a nylon 6 solid;
step five, drying the nylon 6 solid in an oven at the temperature of 100-120 ℃ for 3-4h to ensure that the water content is less than 5%;
step six, adding a plasticizer, an antioxidant, a lubricant, a heat stabilizer, an anti-hydrolysis agent, a nucleating agent and a chain extender into the dried nylon 6 solid to obtain a mixture;
and step seven, carrying out melt spinning on the mixture obtained in the step six to obtain the regenerated nylon 6 fiber.
2. The process of making regenerated nylon 6 fiber of claim 1, characterized by: the mass ratio of the catalyst to the nylon 6 waste in the second step is 0.2-0.4%.
3. The process of manufacturing regenerated nylon 6 fiber according to claim 1 or 2, characterized in that: the catalyst in the second step is a mixture of 30% sodium chloride and 70% ferric chloride.
4. The process of making regenerated nylon 6 fiber of claim 1, characterized by: in the second step, the mass ratio of the mixed solvent to the nylon 6 waste is 1: 1.
5. process for the manufacture of recycled nylon 6 fiber according to claim 1 or 4, characterized in that: in the second step, the mixed solvent is a mixture of 60% of ethanol and 40% of dichloroethane.
6. The process of making regenerated nylon 6 fiber of claim 1, characterized by: in the fourth step, the nylon 6 is put into a crystallization kettle for crystallization, and the temperature in the crystallization kettle is 35-45 ℃.
7. The process of making regenerated nylon 6 fiber of claim 1, characterized by: in the step seven, a linear spinneret plate is adopted in the melt spinning process, and the melting temperature is 280 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110026882.9A CN112853534A (en) | 2021-01-09 | 2021-01-09 | Process for manufacturing regenerated nylon 6 fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110026882.9A CN112853534A (en) | 2021-01-09 | 2021-01-09 | Process for manufacturing regenerated nylon 6 fiber |
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| Publication Number | Publication Date |
|---|---|
| CN112853534A true CN112853534A (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110026882.9A Pending CN112853534A (en) | 2021-01-09 | 2021-01-09 | Process for manufacturing regenerated nylon 6 fiber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113774508A (en) * | 2021-09-15 | 2021-12-10 | 嘉兴市富达化学纤维厂 | Spinning method for regenerating nylon 66 fibers based on air bag leftover materials |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103450678A (en) * | 2013-08-28 | 2013-12-18 | 宁波伊德尔新材料有限公司 | Waterproof alcoholysis high-temperature resistant renewable nylon 66 composite material and preparation method thereof |
| CN105367818A (en) * | 2015-11-08 | 2016-03-02 | 韶关市连邦环保新材料股份有限公司 | Method for preparing pure product nylon 6 by taking nylon 6 waste material as raw material |
-
2021
- 2021-01-09 CN CN202110026882.9A patent/CN112853534A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103450678A (en) * | 2013-08-28 | 2013-12-18 | 宁波伊德尔新材料有限公司 | Waterproof alcoholysis high-temperature resistant renewable nylon 66 composite material and preparation method thereof |
| CN105367818A (en) * | 2015-11-08 | 2016-03-02 | 韶关市连邦环保新材料股份有限公司 | Method for preparing pure product nylon 6 by taking nylon 6 waste material as raw material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113774508A (en) * | 2021-09-15 | 2021-12-10 | 嘉兴市富达化学纤维厂 | Spinning method for regenerating nylon 66 fibers based on air bag leftover materials |
| CN113774508B (en) * | 2021-09-15 | 2023-08-08 | 嘉兴市富达化学纤维厂 | Spinning method based on air bag leftover material regenerated nylon 66 fiber |
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Application publication date: 20210528 |