CN114703554A - Efficient and practical preparation method for aramid raw pulp stretch-solidification molding - Google Patents
Efficient and practical preparation method for aramid raw pulp stretch-solidification molding Download PDFInfo
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- CN114703554A CN114703554A CN202210452337.0A CN202210452337A CN114703554A CN 114703554 A CN114703554 A CN 114703554A CN 202210452337 A CN202210452337 A CN 202210452337A CN 114703554 A CN114703554 A CN 114703554A
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- aramid fiber
- solidification
- aramid
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/06—Wet spinning methods
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
- D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-blowing
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Artificial Filaments (AREA)
Abstract
The invention discloses a high-efficiency and practical preparation method for stretching, solidifying and forming aramid fiber virgin pulp, which belongs to the technical field of aramid fiber preparation, wherein a device used in the method comprises a solidifying tank and a solidifying liquid inside the solidifying tank, a spinning head assembly is arranged at the bottom of the solidifying tank and is immersed in the solidifying liquid, the spinning head assembly is communicated through an aramid fiber virgin pulp input pipe, the aramid fiber virgin pulp is introduced into the spinning head assembly through the aramid fiber virgin pulp input pipe, a godet roller is arranged above the solidifying tank, the aramid fiber virgin pulp sprayed out from the spinning head assembly is solidified through the solidifying liquid to form aramid fiber, the aramid fiber is wound on the godet roller, the solidifying liquid concentration is 1.4-1.5g/cm3 during the solidification of the aramid fiber, the godet roller is positioned right above the spinning head assembly, and the filament outlet direction of the spinning head assembly is vertically upward and faces the godet roller. According to the method, the density of the solidification liquid is increased by adding the auxiliary agent into the original solidification liquid, so that the sprayed aramid fiber can float on the surface layer of the solidification liquid after being formed, is obvious and visible, and is convenient for workers to find.
Description
Technical Field
The invention relates to the technical field of aramid fiber preparation, in particular to a high-efficiency and practical preparation method for stretching, solidifying and forming aramid raw pulp.
Background
Aramid fiber belongs to a key strategic material of the country and is an industry which is mainly supported and developed by the country. The state has come out of a series of industrial policies to encourage and support the development of the aromatic paper material industry. At present, the field of high-end aramid paper in China is almost monopolized by foreign countries, most of the high-end aramid paper mainly depends on import, and the high-end aramid paper is widely applied to important fields of national economic development, such as: high temperature transformers, motors, generators, cables, wires and nuclear power equipment insulation; high-end electronic appliances and circuit boards; the honeycomb material is applied to the fields of honeycomb parts of lightweight high-rigidity secondary stress parts such as aerospace, rail traffic, yacht ships and warships, building materials and the like, and the fields of protective tooling fabrics such as special fire fighting, metallurgy, chemical engineering, electric power, petroleum, combat and the like.
In the production and manufacturing process of the aramid fiber, the process of spinning, stretching and solidifying the aramid fiber raw pulp in a solidifying bath tank through a spinneret plate is an extremely important link. Because the density of the aramid fiber is 1.3-1.4 and the density of the solidification liquid is 1.0-1.1, when the aramid fiber raw stock is sprayed out of a large number of aramid fiber filaments in a solidification bath through a spinneret plate in a spinneret assembly, the aramid fiber raw stock is easy to sink to the bottom of the solidification bath when being stretched, solidified and formed, a worker needs to use a long clamp to clamp the filaments, and the filaments are slowly pulled upwards and horizontally pulled above a godet roller to complete the head stretching process.
Firstly, after the sprayed filaments sink to the bottom, turbid coagulating liquid influences the sight, which is not beneficial to the filament clamping of workers and is not easy to operate; secondly, the working personnel can not pull out the filaments quickly after the filament clamping process is too long, so that the aramid raw stock can not be pulled into filaments, and the aramid raw stock is accumulated together to easily block the fine holes of a spinneret plate, so that the spinning is not uniform, the CV value is large, and the doubling phenomenon (namely 2 or a plurality of filaments are stuck together) is easy to occur, and the quality is seriously influenced; and thirdly, a plurality of groups of spinneret assemblies are distributed in the coagulation bath tank and are used for producing aramid fibers, if one of the groups of spinneret assemblies is broken or abnormal, aramid virgin pulp can directly sink through the spinneret plate due to lack of traction force and is not easy to be perceived by an operator, so that a large amount of aramid virgin pulp is wasted, once the aramid virgin pulp sinks too much, a solvent in the aramid polymer cannot be released, the concentration of a coagulation liquid in the coagulation bath tank changes, and normal spinning of other spinneret assemblies in the coagulation bath tank can also be influenced.
Disclosure of Invention
The invention aims to provide an efficient and practical preparation method for stretching, solidifying and forming aramid raw pulp, so as to solve various technical problems in a solidification bath tank for preparing aramid fibers in the prior art.
The invention provides a high-efficiency practical preparation method for stretching, solidifying and forming aramid fiber virgin stock, which comprises a solidifying tank, wherein the solidifying tank is filled with solidifying liquid, the bottom of the solidifying tank is provided with a spinning nozzle assembly, the spinning nozzle assembly is immersed in the solidifying liquid, the spinning nozzle assembly is communicated through an aramid fiber virgin stock input pipe, the aramid fiber virgin stock is introduced into the spinning nozzle assembly through the aramid fiber virgin stock input pipe, a godet roller is arranged above the solidifying tank, the aramid fiber virgin stock sprayed out from the spinning nozzle assembly is solidified through the solidifying liquid to form aramid fiber, the aramid fiber is wound on the godet roller, the concentration of the solidifying liquid used in the solidification and wire drawing of the aramid fiber is 1.4-1.5g/cm3, the godet roller is positioned right above the spinning nozzle assembly, and the wire outlet direction of the spinning nozzle assembly is vertically upward, towards the godet roll.
Furthermore, the solidification liquid is added with an auxiliary agent to increase the density of the solidification liquid from 1.0-1.1g/cm3 to 1.4-1.5g/cm 3. The auxiliary agent is added into the solidification liquid, so that the density of the solidification liquid reaches 1.4-1.5g/cm3 and is higher than that of aramid fiber by 1.3-1.4g/cm3, the aramid raw pulp can quickly float on the surface layer of the solidification liquid after being sprayed and solidified into the aramid fiber, and workers can find the aramid fiber.
Further, aramid fiber magma single spouts at 5000-.
Furthermore, in the normal thread guiding process of the godet roller, when white aramid pulp and aramid fiber are converged on the surface of the solidification liquid right above the spinneret assembly, thread breakage is illustrated. When the godet roller conducts yarn to the aramid fiber, the broken aramid fiber can float on the surface of the solidification liquid due to lack of traction force, and bottom sinking can not occur to influence the concentration of the solidification liquid.
Further, the solidification liquid is a DMAC (dimethylacetamide) aqueous solution, wherein the DMAC content is 30-70%, the temperature is 10-50 ℃, and the auxiliary agent is a salt, sodium chloride or calcium chloride.
Compared with the prior art, the invention has the beneficial effects that:
firstly, in the prior art, after the aramid fiber raw pulp is sprayed out through a spinneret, a plurality of problems are easy to occur in a coagulating tank, such as the problem that sprayed filaments are not easy to clamp in turbid coagulating liquid, the problem that sprayed filaments are easy to pile and merge, and the problem that broken filaments are not easy to find and cause raw material waste, aiming at the problems, the invention designs a novel method for coagulating and stretching aramid fibers in the coagulating liquid, and the method increases the density of the coagulating liquid by adding an auxiliary agent into the original coagulating liquid, so that the density of the coagulating liquid is greater than the density (1.3-1.4g/cm3) of the aramid fibers, thereby leading the aramid fiber raw pulp sprayed out from a spinneret component at the bottom of the coagulating tank, the aramid fibers formed by coagulation to float on the surface layer of the coagulating liquid after being formed, being obvious and visible, being convenient for workers to find and clamp on a godet, simultaneously, when the broken silk condition appears, the fibre broken end that is not guided the silk by the godet roller can collect on the solidification liquid surface, the comparatively obvious condition appears, the staff of being convenient for handles the broken silk, thereby avoid the waste of aramid fiber magma raw materials, on the other hand, because the godet roller is located spinneret component directly over, the distance of godet roller and spinneret component has been shortened, make aramid fiber carry out the seal wire directly through the godet roller directly over after being spout, be difficult for taking place the broken silk on the way of carrying the godet roller, the probability of broken silk has been reduced.
Secondly, in the invention, the auxiliary agent is added into the solidification liquid, so that the density of the solidification liquid reaches 1.4-1.5g/cm3 and is higher than that of aramid fiber by 1.3-1.4g/cm3, and the aramid raw pulp can quickly float on the surface layer of the solidification liquid after being sprayed and solidified into the aramid fiber, thereby being convenient for workers to find.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of a raw spinning coagulation extension;
FIG. 2 is a schematic view of the structure of the spinneret coagulation extension head of the present invention.
Reference numerals are as follows:
1. an aramid fiber raw pulp input pipe; 2. a spinneret assembly; 3. solidifying liquid; 4. a coagulating tank; 5. a godet roller; 6. aramid fibers.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment of the invention provides a high-efficiency and practical preparation method for aramid fiber virgin stock stretch-solidification forming, which is shown by combining a graph 1 and a graph 2, and the method uses a device comprising a solidification tank 4, wherein solidification liquid 3 is contained in the solidification tank 4, a spinneret assembly 2 is arranged at the bottom of the solidification tank 4, the spinneret assembly 2 is immersed in the solidification liquid 3, the spinneret assembly 2 is communicated through an aramid fiber virgin stock input pipe 1, the aramid fiber virgin stock is introduced into the spinneret assembly 2 through the aramid fiber virgin stock input pipe 1, a godet 5 is arranged above the solidification tank 4, the aramid fiber virgin stock sprayed by the spinneret assembly 2 is solidified by the solidification liquid 3 to form aramid fibers 6, the aramid fibers 6 are wound on the godet 5, the concentration of the solidification liquid 3 used in the solidification of the aramid fibers 6 is 1.4-1.5g/cm3, the godet 5 is positioned right above the spinneret assembly 2, the direction of the output of the spinneret assembly 2 is vertically upward, towards the godet roll 5. In the prior art, after the aramid fiber raw pulp is sprayed out through a spinneret, a plurality of problems are easy to occur in a coagulating tank 4, such as the problem that sprayed filaments are not easy to clamp in turbid coagulating liquid 3, the problem that sprayed filaments are easy to pile and merge, and the problem that broken filaments are not easy to find and cause raw material waste, aiming at the problems, the invention designs a novel method for coagulating and stretching aramid fibers 6 in the coagulating liquid 3, and the method increases the density of the coagulating liquid 3 by adding an auxiliary agent into the original coagulating liquid 3, so that the density of the coagulating liquid 3 is greater than the density of the aramid fibers 6 by 1.3-1.4g/cm3, and the aramid fiber raw pulp sprayed out from a spinneret assembly 2 at the bottom of the coagulating tank 4 and the aramid fibers 6 formed by coagulation can float on the surface layer of the coagulating liquid 3 after being formed, are obvious and visible, and are convenient for workers to find, and press from both sides and get the winding overlap joint on godet 5, simultaneously, when the disconnected silk condition appears, the fibre broken end of not being guided wire by godet 5, can collect on coagulating liquid 3 surfaces, the more obvious condition appears, the staff of being convenient for handles disconnected silk, thereby avoid the waste of aramid fiber magma raw materials, on the other hand, because godet 5 is located spinning pack 2 directly over, the distance of godet 5 with spinning pack 2 has been shortened, make aramid fiber 6 carry out the seal wire directly through godet 5 directly over after being spout, be difficult for taking place disconnected silk on the way of carrying godet 5, the probability of disconnected silk has been reduced.
Specifically, the auxiliary agent is added into the solidification liquid 3, so that the density of the solidification liquid 3 is improved from 1.0-1.1g/cm3 to 1.4-1.5g/cm 3. The auxiliary agent is added into the solidification liquid 3, so that the density of the solidification liquid reaches 1.4-1.5g/cm3 and is 1.3-1.4g/cm3 higher than that of the aramid fiber 6, the aramid fiber raw pulp can quickly float on the surface layer of the solidification liquid 3 after being sprayed and solidified into the aramid fiber 6, and workers can conveniently find the aramid fiber raw pulp.
Specifically, aramid fiber magma single spouts at 5000-.
Specifically, in the normal yarn guiding process of the godet roller 5, when white aramid virgin pulp and aramid fiber 6 are gathered on the surface of the solidification liquid 3 right above the spinneret assembly 2, yarn breakage is indicated. When the godet roller 5 conducts the yarn on the aramid fiber 6, the broken aramid fiber 6 floats on the surface of the solidification liquid 3 due to lack of traction force, and bottom sinking cannot occur to influence the concentration of the solidification liquid 3.
Specifically, the solidification liquid 3 adopts a DMAC aqueous solution, wherein the DMAC content is 30-70%, the temperature is 10-50 ℃, and the auxiliary agent is salt, sodium chloride or calcium chloride.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. The utility model provides a high-efficient practical aramid fiber magma tensile solidification fashioned preparation method, the device that this method used includes coagulating basin (4), splendid attire has coagulating liquid (3) in coagulating basin (4), the bottom of coagulating basin (4) is provided with spinneret subassembly (2), and spinneret subassembly (2) submergence in coagulating liquid (3), spinneret subassembly (2) are through aramid fiber magma input tube (1) intercommunication, and aramid fiber magma lets in spinneret subassembly (2) through aramid fiber magma input tube (1), the top of coagulating basin (4) is provided with godet (5), aramid fiber magma of spinneret subassembly (2) spun forms aramid fiber (6) through the solidification of coagulating liquid (3), aramid fiber (6) twine on godet (5), its characterized in that: in the solidification and drawing of the aramid fiber (6), the concentration of the solidification liquid (3) used is 1.4-1.5g/cm3The godet roller (5) is located right above the spinning nozzle assembly (2), and the yarn outlet direction of the spinning nozzle assembly (2) is vertically upward and faces the godet roller (5).
2. The efficient and practical preparation method for the stretch-solidification forming of the aramid raw pulp as claimed in claim 1, is characterized in that: the auxiliary agent is added into the solidification liquid (3) to ensure that the density of the solidification liquid (3) is 1.0-1.1g/cm3Lifting to 1.4-1.5g/cm3。
3. The efficient and practical preparation method for the stretch-solidification forming of the aramid raw pulp as claimed in claim 1, is characterized in that: aramid raw stock single spouts at 5000-.
4. The efficient and practical preparation method for the stretch-solidification forming of the aramid raw pulp as claimed in claim 1, is characterized in that: during the normal yarn guiding process of the yarn guiding roller (5), when white aramid raw pulp and aramid fiber (6) are collected on the surface of the solidification liquid (3) right above the spinning nozzle assembly (2), yarn breakage is indicated.
5. The efficient and practical preparation method for the stretch-solidification forming of the aramid raw pulp as claimed in claim 2, characterized by comprising the following steps: the solidification liquid (3) adopts DMAC water solution, wherein the DMAC content is 30-70%, the temperature is 10-50 ℃, and the auxiliary agent is salt, sodium chloride or calcium chloride.
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| CN202210452337.0A CN114703554B (en) | 2022-04-27 | 2022-04-27 | Preparation method for aramid fiber primary pulp stretch solidification molding |
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| CN202210452337.0A CN114703554B (en) | 2022-04-27 | 2022-04-27 | Preparation method for aramid fiber primary pulp stretch solidification molding |
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