CN111270339A - Production process of rapidly biodegradable microporous polyester fiber - Google Patents
Production process of rapidly biodegradable microporous polyester fiber Download PDFInfo
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- CN111270339A CN111270339A CN202010300559.1A CN202010300559A CN111270339A CN 111270339 A CN111270339 A CN 111270339A CN 202010300559 A CN202010300559 A CN 202010300559A CN 111270339 A CN111270339 A CN 111270339A
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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
- D01F6/92—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 polyesters
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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
- D01D1/00—Treatment of filament-forming or like material
- D01D1/04—Melting filament-forming substances
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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
- D01D13/00—Complete machines for producing artificial threads
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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
- D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
- D01D5/247—Discontinuous hollow structure or microporous structure
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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
- 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
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Abstract
The invention discloses a production process of a fast biodegradable microporous polyester fiber, which is characterized in that a high-temperature foaming agent and a biodegradable additive are added, so that the biodegradable additive is fully dispersed and uniformly distributed in the microporous polyester fiber in the high-temperature foaming and decomposing process of the biodegradable additive, and the microporous polyester fiber becomes a porous fiber material, so that the microporous polyester fiber becomes a loose-structure fiber with the fully dispersed and uniformly distributed biodegradable additive, the fiber is easy to biodegrade, the biodegradation speed is accelerated, and the degradation period is shortened by times.
Description
Technical Field
The invention relates to the technical field of fiber degradation, in particular to a production process of a micro-porous polyester fiber capable of being rapidly biodegraded.
Background
The biological degradation of terylene by using microorganisms to protect the environment has been studied and applied for many years. In the prior method, in the production of polyester fiber, a certain proportion of biodegradable additives and polyester chips are mixed and granulated into biodegradable additive master batches, and the master batches are added in the spinning process of the polyester fiber so as to enable the polyester fiber to become the biodegradable polyester fiber.
The biodegradable additive has certain hydrophilicity, can cause the polyester fiber to generate chain forging hydrolysis within a certain time, and can be cooperated with microorganisms to decompose the polyester fiber into micromolecular compounds in the environment with the existence of the microorganisms, thereby achieving the effect of biodegradation. And the degradation time and the degradation speed are the most critical factors. Currently, substantial degradation can generally occur at unequal times ranging from 30 weeks to 30 months. And has no good degradation effect on the polyester for recycling having high Intrinsic Viscosity (IV).
However, the following factors affect the biodegradation speed and efficiency of the polyester fiber and the recycled polyester:
1. biodegradable additives are difficult to distribute sufficiently uniformly in the fibers.
At present, the master batches of the biodegradable additives are added into the spinning fluid, but the adding proportion is not high, and is generally in the range of 1-5%, which is caused by the spinnability of spinning and the cost of the biological additives, so that the biological additives are added in low proportion. The degradable biological additive with small proportion is naturally mixed in the spinning fluid and is mixed under the action of a spinning screw. Due to the viscosity of the spinning fluid, the small proportion of the components of the biodegradable additives and the natural mixing mode, the biological additives are difficult to be fully and uniformly dispersed in the fiber, and certain areas are lack of the biodegradable additives. Resulting in a longer biodegradation time.
2. Dense fiber structure problem
The spinning fluid is a closed aggregate having a dense crystalline structure after the primary fiber is drawn and heat-set-molded. This results in the microorganism contacting the dense structure, which only starts from the surface of the fiber, slowly degrades from the outside to the inside, and has high crystallinity, and also makes the fracture of the chain forging and the microorganism touch difficult, and the degradation speed of the microorganism is slow.
Therefore, the existing polyester fiber biodegradation technology still needs to be improved and developed.
Disclosure of Invention
The invention aims to provide a production process of a microporous polyester fiber capable of being quickly biodegraded, which is characterized in that in the fiber production and forming process, internal biodegradation additives are fully dispersed and uniformly distributed in the fiber, meanwhile, the fiber becomes a porous fiber material, external microorganisms easily touch the inside, and accordingly, the fiber becomes a fiber with fully dispersed and uniformly distributed biodegradation additives and a porous structure, so that the fiber is easy to biodegrade, and the biodegradation speed is accelerated.
The technical scheme of the invention is as follows: a production process of a micro-porous polyester fiber capable of being rapidly biodegraded comprises the following steps:
s1: adding a high-temperature-resistant foaming agent in the process of polymerization reaction of a first monomer and a second monomer to obtain a polyester polymer containing the high-temperature foaming agent;
s2: pre-crystallizing the polymer, and then drying;
s3: feeding the dried polymer into a spinning screw, and injecting a biodegradable additive from a spinning injector to prepare a polyester polymer fluid containing the biodegradable additive and a high-temperature-resistant foaming agent;
s4: after being discharged from a spinning screw, the polyester polymer fluid is foamed and decomposed at high temperature to obtain a spinning fluid which is fully dispersed and uniformly distributed with biodegradable additives and has a bubble structure;
s5: and preparing the spinning fluid into corresponding microporous polyester fibers according to production requirements.
The production process of the rapidly biodegradable microporous polyester fiber comprises the following steps of (1) preparing a first monomer, wherein the first monomer is terephthalic acid; the second monomer is ethylene glycol.
The production process of the rapidly biodegradable microporous polyester fiber comprises the steps that the decomposition temperature of the high-temperature-resistant foaming agent is more than or equal to 300 ℃, and the high-temperature-resistant foaming agent is released after high-temperature thermal decomposition
And nitrogen.
The production process of the rapidly biodegradable microporous polyester fiber comprises the following steps of: (first monomer + second monomer): blowing agent = X/100-X, wherein X is 0.1 to 3.
The production process of the rapidly biodegradable microporous polyester fiber comprises the step of preparing a first monomer and a second monomer, wherein the melting points of the first monomer and the second monomer are lower than 280 ℃.
The production process of the rapidly biodegradable microporous polyester fiber comprises the step of spinning at a temperature lower than 300 ℃ in a spinning screw.
The production process of the rapidly biodegradable microporous polyester fiber comprises the following steps of S4: discharging polyester polymer fluid containing biodegradable additives and high-temperature-resistant foaming agent from a spinning screw, allowing the discharged polyester polymer fluid to enter a foaming area for high-temperature foaming, wherein the high-temperature-resistant foaming agent is subjected to chemical foaming, the biodegradable additives are more uniformly dispersed in the spinning fluid due to the impact force of foaming, and the high-temperature-resistant foaming agent is released after foaming
And nitrogen, so that the polymer forms a microporous polymer, and the biodegradable additives are uniformly distributed in the porous polymer to obtain the spinning fluid with a bubble structure, wherein the biodegradable additives are fully dispersed and uniformly distributed.
The production process of the rapidly biodegradable microporous polyester fiber comprises the step of preparing a foaming zone, wherein the foaming zone is a pipeline zone without a spinning screw, and the temperature of the foaming zone is more than or equal to 300 ℃.
In the step S5, the spinning fluid is processed by a spinneret, by drawing, shaping, and cutting to obtain short fibers, which are microporous fibers with rapid biodegradation.
In the step S5, the spinning fluid is processed by a spinneret, drafting and shaping to obtain filaments, which are the microporous fibers with rapid biodegradation; or the spinning fluid is processed by processes of spinning, drafting, sizing and curling through a spinneret plate to prepare the filament which is the microporous fiber with quick biodegradation.
The invention has the beneficial effects that: the invention provides a production process of a fast biodegradable microporous polyester fiber, which is characterized in that a high-temperature foaming agent and a biodegradable additive are added, so that the biodegradable additive is fully dispersed and uniformly distributed in the microporous polyester fiber in the high-temperature foaming and decomposing process of the biodegradable additive, and the microporous polyester fiber becomes a porous fiber material, so that the microporous polyester fiber becomes a loose-structure fiber with the fully dispersed and uniformly distributed biodegradable additive, the fiber is easy to biodegrade, the biodegradation speed is accelerated, and the degradation period is shortened by times.
Drawings
FIG. 1 is a flow chart showing the steps of the process for producing a rapidly biodegradable microporous polyester fiber according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and 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 considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
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; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
As shown in fig. 1, a process for producing a rapidly biodegradable microporous polyester fiber specifically comprises the following steps:
s1: adding a high-temperature-resistant foaming agent in the process of polymerization reaction of a first monomer and a second monomer to obtain a polyester polymer containing the high-temperature foaming agent, wherein the adding ratio of the first monomer to the second monomer is 2: 1-4: 1.
in some embodiments, the high temperature foaming agent is formed by compounding an anionic surfactant with other additives (such as AGES, AGS8, PMP-1, commercial foaming agent F240B, and the like), or a sulfonate anionic surfactant with other additives (such as a high temperature drilling fluid foaming agent disclosed in patent CN 107841295A), or a KGF-1 high temperature foaming agent (such as a heavy oil steam huff and puff high temperature foaming agent, and the like), and the like.
In certain embodiments, the first monomer is terephthalic acid; the second monomer is ethylene glycol.
In some embodiments, the decomposition temperature of the high-temperature-resistant foaming agent is more than or equal to 300 ℃, and the high-temperature-resistant foaming agent is released after high-temperature thermal decomposition
And nitrogen.
In certain embodiments, the weight ratio of the first monomer, the second monomer, and the high temperature resistant blowing agent is: (first monomer + second monomer): blowing agent = X/100-X, wherein X is in the range of 0.1-3, i.e. (first monomer + second monomer): blowing agent =0.1/99.9~ 3/97.
In certain embodiments, the melting points of the first and second monomers are less than 280 degrees.
S2: the polymer is subjected to a pre-crystallization treatment and then dried.
S3: and (2) feeding the dried polymer into a spinning screw, and injecting a biodegradable additive from a spinning injector to prepare the polyester polymer fluid containing the biodegradable additive and the high-temperature-resistant foaming agent, wherein the addition proportion of the biodegradable additive is 0.5-5% of the total weight of the rapidly biodegradable microporous polyester fiber.
In certain embodiments, the spinning temperature within the spinning screw is less than 300 ℃.
In some embodiments, the biodegradable additive includes any one or more of natural polymer cellulose, synthetic polycaprolactone, polyvinyl alcohol, aliphatic-aromatic ester, modified polylactic acid, monosaccharide, and aldohexose, and the like, and the conventional biodegradable additive (such as a biodegradable agent, biodegradable fiber and preparation method disclosed in CN 110644066 a) can also be used.
S4: the polyester polymer fluid is discharged from the spinning screw and then foamed and decomposed at high temperature to obtain the spinning fluid which is fully dispersed and uniformly distributed with the biodegradable additives and has a bubble structure.
In certain embodiments, the step S4 specifically includes the following steps: discharging polyester polymer fluid containing biodegradable additives and high-temperature-resistant foaming agent from a spinning screw, allowing the discharged polyester polymer fluid to enter a foaming area for high-temperature foaming, wherein the high-temperature-resistant foaming agent is subjected to chemical foaming, the biodegradable additives are more uniformly dispersed in the spinning fluid due to the impact force of foaming, and the high-temperature-resistant foaming agent is released after foaming
And nitrogen to make the polymer form a microporous porous polymer, so that the biodegradable additive is uniformly distributed in the porous polymer to obtain the biodegradable additiveFully dispersed and uniformly distributed spinning fluid with a bubble structure.
In certain embodiments, the foaming zone is a tube zone without a spinning screw, the temperature of the zone being greater than or equal to 300 ℃.
Preferably, the foaming area adopts a foaming box, and the temperature in the foaming box is more than or equal to 300 ℃.
S5: and preparing the spinning fluid into corresponding microporous polyester fibers according to production requirements.
In some embodiments, in step S5, the spinning fluid is processed by spinning, drawing, shaping, and cutting through a spinneret to obtain short fibers, which are rapidly biodegradable and microporous fibers.
YARN, synthetic fiber filaments further produced by spin drawing), which are rapidly biodegradable, microporous fibers. DRAW in some embodiments, in step S5, the spinning fluid is processed by spinning, drawing and shaping through a spinneret to obtain filament (FDY (fully drawn yarn, FULL: FULL)
YARN, which is made by drawing and false twist texturing POY) from a raw YARN), which is a rapidly biodegradable microporous fiber. TEXTURED in some embodiments, in step S5, the spinning fluid is passed through a spinneret to be spun, drawn, sized, and crimped to produce filaments (DTY (drawn TEXTURED yarn, general name: DRAW)
The fiber with loose structure and fully dispersed and uniformly distributed microorganisms prepared by the production process has greatly increased biodegradable speed and shortened degradation period by more than one time (the traditional degradation period is different from several weeks to 30 months, while the biodegradable speed of the fiber prepared by the technical scheme is 1/2 of the traditional degradation speed).
The process for producing the rapidly biodegradable microporous polyester fiber according to the above is illustrated by the following examples:
example 1
(1) Preparation of polymers
Wherein the first monomer is terephthalic acid: the second monomer is ethylene glycol: 2/1. During the polymerization reaction of the first monomer and the second monomer, a high-temperature-resistant commercial blowing agent F240B was added. The decomposition temperature of the high-temperature-resistant foaming agent is more than or equal to 300 ℃, and the high-temperature-resistant foaming agent is released after high-temperature thermal decomposition
And nitrogen. The proportion of the foaming agent was 1/97.
(2) The polymer is subjected to a pre-crystallization treatment and then dried.
(3) And (2) feeding the dried polymer into a spinning screw, and injecting a biodegradable additive from a spinning injector, wherein the biodegradable additive is a biodegradable agent disclosed in patent CN 110644066A, a biodegradable fiber and a biodegradable agent disclosed in the preparation method, and the addition amount of the biodegradable additive is 2% of the total weight of the rapidly biodegradable microporous polyester fiber, so as to prepare the polyester polymer fluid containing the biodegradable additive and the high-temperature-resistant foaming agent.
(4) The spinning temperature of the polyester polymer fluid spinning screw containing the biodegradable additive and the high-temperature-resistant foaming agent is 290 ℃, the polyester polymer fluid spinning screw enters a foaming area for high-temperature foaming after being discharged, and the temperature of the foaming area is 305 ℃; the high-temperature resistant foaming agent is chemically foamed, the impact force of foaming enables the biodegradable additive to be more uniformly diffused in the spinning fluid, and the high-temperature resistant foaming agent is released after foaming
And nitrogen, so that the polymer forms a microporous polymer, and the biodegradable additives are uniformly distributed in the porous polymer to obtain the spinning fluid with a bubble structure, wherein the biodegradable additives are fully dispersed and uniformly distributed.
(5) The spinning fluid with the bubble structure is subjected to a conventional spinning process to prepare DTY.
(6) DTY was 100D/96F, the strength was 3.1cn/dtex, and the elongation at break was 33%.
(7) The fiber can be biodegraded by 90 percent in 90 days under the common soil environment.
Example 2
(1) Preparation of polymers
Wherein the first monomer is terephthalic acid: the second monomer is ethylene glycol 3/1. Adding a high-temperature KGF-1 foaming agent with high temperature resistance in the process of polymerizing the first monomer and the second monomer. The decomposition temperature of the high-temperature-resistant foaming agent is more than or equal to 300 ℃, and the high-temperature-resistant foaming agent is released after high-temperature thermal decomposition
And nitrogen. The proportion of the foaming agent was 1/95.
(2) The polymer is subjected to a pre-crystallization treatment and then dried.
(3) The dried polymer is fed into a spinning screw, and a biodegradable additive is injected from a spinning injector, wherein the biodegradable additive is a biodegradable agent disclosed in patent CN 110644066A, a biodegradable fiber and a biodegradable agent disclosed in the preparation method, and the addition amount of the biodegradable additive is 5% of the total weight of the rapidly biodegradable microporous polyester fiber. The polyester polymer fluid containing the biodegradable additive and the high-temperature-resistant foaming agent is prepared.
(4) The spinning temperature of the polyester polymer fluid spinning screw containing the biodegradable additive and the high-temperature-resistant foaming agent is 290 ℃, the polyester polymer fluid spinning screw enters a foaming area for high-temperature foaming after being discharged, and the temperature of the foaming area is 305 ℃; the high-temperature resistant foaming agent is chemically foamed, the impact force of foaming enables the biodegradable additive to be more uniformly diffused in the spinning fluid, and the high-temperature resistant foaming agent is released after foaming
And nitrogen, so that the polymer forms a microporous polymer, and the biodegradable additives are uniformly distributed in the porous polymer to obtain the spinning fluid with a bubble structure, wherein the biodegradable additives are fully dispersed and uniformly distributed.
(5) The spinning fluid with the bubble structure is subjected to a conventional spinning process to prepare FDY.
(6) FDY 100D/96F strength 2.9cn/dtex, elongation at break 35%.
(7) The fiber can be biodegraded by 90% in 80 days under the common soil environment.
Example 3
(1) Preparation of polymers
Wherein the first monomer is terephthalic acid: the second monomer is ethylene glycol 4/1. Adding a high-temperature-resistant PMP-1 type foaming agent in the process of carrying out polymerization reaction on a first monomer and a second monomer. The decomposition temperature of the high-temperature-resistant foaming agent is more than or equal to 300 ℃, and the high-temperature-resistant foaming agent is released after high-temperature thermal decomposition
And nitrogen. The proportion of the foaming agent was 1/98.
(2) The polymer is subjected to a pre-crystallization treatment and then dried.
(3) And (2) feeding the dried polymer into a spinning screw, and injecting a biodegradable additive from a spinning injector, wherein the biodegradable additive comprises a mixture of artificially synthesized polycaprolactone, polyvinyl alcohol, aliphatic-aromatic ester, modified polylactic acid, monosaccharide and aldohexose, and the addition of the biodegradable additive is 3% of the total weight of the rapidly biodegradable microporous polyester fiber. The polyester polymer fluid containing the biodegradable additive and the high-temperature-resistant foaming agent is prepared.
(4) The spinning temperature of the polyester polymer fluid spinning screw containing the biodegradable additive and the high-temperature-resistant foaming agent is 290 ℃, the polyester polymer fluid spinning screw enters a foaming area for high-temperature foaming after being discharged, and the temperature of the foaming area is 305 ℃; the high-temperature resistant foaming agent is chemically foamed, the impact force of foaming enables the biodegradable additive to be more uniformly diffused in the spinning fluid, and the high-temperature resistant foaming agent is released after foaming
And nitrogen to make the polymer form a porous polymer with micro-pores, so that the biodegradable additive is uniformly distributed in the porous polymer to obtain the gas with the biodegradable additive fully dispersed and uniformly distributedA bubble structured spinning fluid.
(5) The spinning fluid with the bubble structure is prepared into short fibers through a conventional spinning process.
(6) The staple fiber was 1.5D 38mm. strength was 3.5cn/dtex, elongation at break 29%.
(7) The fiber can be biodegraded by 90% in 102 days under the common soil environment.
In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. A production process of a micro-porous polyester fiber capable of being rapidly biodegraded is characterized by comprising the following steps:
s1: adding a high-temperature-resistant foaming agent in the process of polymerization reaction of a first monomer and a second monomer to obtain a polyester polymer containing the high-temperature foaming agent;
s2: pre-crystallizing the polymer, and then drying;
s3: feeding the dried polymer into a spinning screw, and injecting a biodegradable additive from a spinning injector to prepare a polyester polymer fluid containing the biodegradable additive and a high-temperature-resistant foaming agent;
s4: after being discharged from a spinning screw, the polyester polymer fluid is foamed and decomposed at high temperature to obtain a spinning fluid which is fully dispersed and uniformly distributed with biodegradable additives and has a bubble structure;
s5: and preparing the spinning fluid into corresponding microporous polyester fibers according to production requirements.
2. The process for producing a rapidly biodegradable microporous polyester fiber according to claim 1, wherein the first monomer is terephthalic acid; the second monomer is ethylene glycol.
3. The process for producing a rapidly biodegradable microporous polyester fiber according to claim 1, wherein the decomposition temperature of the high temperature resistant foaming agent is not less than 300 ℃, and the high temperature resistant foaming agent is released after thermal decomposition at high temperature
And nitrogen.
4. The process for producing a rapidly biodegradable microporous polyester fiber according to claim 1, wherein the weight ratio of the first monomer, the second monomer and the high temperature resistant foaming agent is: (first monomer + second monomer): blowing agent = X/100-X, wherein X is 0.1 to 3.
5. The process for producing rapidly biodegradable microporous polyester fiber according to any one of claims 1 to 4, wherein the melting points of the first monomer and the second monomer are less than 280 ℃.
6. The process for the production of rapidly biodegradable microporous polyester fibers according to any of claims 1 to 4, characterized in that the spinning temperature inside the spinning screw is lower than 300 ℃.
7. The process for the production of the rapidly biodegradable microporous polyester fiber according to any one of claims 1 to 4, wherein the step S4 specifically comprises the following stepsThe process: discharging polyester polymer fluid containing biodegradable additives and high-temperature-resistant foaming agent from a spinning screw, allowing the discharged polyester polymer fluid to enter a foaming area for high-temperature foaming, wherein the high-temperature-resistant foaming agent is subjected to chemical foaming, the biodegradable additives are more uniformly dispersed in the spinning fluid due to the impact force of foaming, and the high-temperature-resistant foaming agent is released after foaming
And nitrogen, so that the polymer forms a microporous polymer, and the biodegradable additives are uniformly distributed in the porous polymer to obtain the spinning fluid with a bubble structure, wherein the biodegradable additives are fully dispersed and uniformly distributed.
8. The process for producing rapidly biodegradable microporous polyester fiber according to any one of claims 1 to 4, wherein the foaming zone is a non-spinning screw pipe zone having a temperature of 300 ℃ or higher.
9. The process for producing rapidly biodegradable microporous polyester fiber according to any one of claims 1 to 4, wherein the spinning fluid is processed by spinning, drawing, sizing and cutting through a spinneret to obtain short fiber, which is rapidly biodegradable microporous fiber, in step S5.
10. The process for producing rapidly biodegradable microporous polyester fiber according to any one of claims 1 to 4, wherein the spinning fluid is processed by spinning, drawing and shaping through a spinneret to obtain filaments, which are rapidly biodegradable microporous fibers, in step S5; or the spinning fluid is processed by processes of spinning, drafting, sizing and curling through a spinneret plate to prepare the filament which is the microporous fiber with quick biodegradation.
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| CN202010300559.1A CN111270339A (en) | 2020-04-16 | 2020-04-16 | Production process of rapidly biodegradable microporous polyester fiber |
| PCT/CN2020/092413 WO2021208192A1 (en) | 2020-04-16 | 2020-05-26 | Production process for rapid biodegradable microporous polyester fiber |
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| CN113304081A (en) * | 2021-06-10 | 2021-08-27 | 龙青容 | Degradable moisturizing self-heating polyester-based dry facial mask |
| CN113318044A (en) * | 2021-05-28 | 2021-08-31 | 龙青容 | Polypropylene dry-state non-woven mask capable of softening dead skin |
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| CN115852515B (en) * | 2022-11-29 | 2024-06-11 | 上海水星家用纺织品股份有限公司 | Hypoallergenic antibacterial polyester fiber and preparation method thereof |
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