CN113897702A - Production process of high-strength spandex filament - Google Patents
Production process of high-strength spandex filament Download PDFInfo
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- CN113897702A CN113897702A CN202111214078.XA CN202111214078A CN113897702A CN 113897702 A CN113897702 A CN 113897702A CN 202111214078 A CN202111214078 A CN 202111214078A CN 113897702 A CN113897702 A CN 113897702A
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- stirring
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- diisocyanate
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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
- D01F6/94—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 other polycondensation products
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4825—Polyethers containing two hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6685—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Artificial Filaments (AREA)
Abstract
The application discloses a production process of high-strength spandex filaments, which comprises the following steps: preparation of a copolymer: selecting polyether glycol, diisocyanate and diamine as raw materials, stirring and mixing the polyether glycol and the diisocyanate according to a molar ratio of 1-2:2 to obtain a copolymer solution, wherein the diamine is filled in a plurality of hot-melt capsules; the preparation method has the technical key points that in the process of preparing the copolymer, polyether glycol, diisocyanate and diamine are mixed and stirred, the polyether glycol and the diisocyanate are fully mixed by primary stirring, and the diamine and the mixture obtained by primary stirring are fully mixed by secondary stirring, so that the operation step of adding the diamine again is saved; according to the invention, two times of filtration treatment are carried out in the process of mixing the auxiliary agent and the copolymer solution, the macromolecular gel in the mixed solution can be dispersed by one-time filtration, larger impurities can be removed, and the micromolecular gel can be dispersed by the second-time filtration.
Description
Technical Field
The invention belongs to the technical field of spandex yarn processing, and particularly relates to a production process of high-strength spandex yarn.
Background
The spandex filament full-name spandex fiber is short for polyurethane fiber and is formed by polymerizing PTMEG and MDI; is a modern clothing industrial material; the garment material spandex filament is covered with short fiber yarn, namely spandex core-spun yarn, and the elastic fabric woven by the spandex filament is comfortable, fit and strong in elasticity, and has the reputation of the second skin of a human body;
according to the characteristics of a spinning process, the existing spandex production process route comprises four processes of solution dry method, solution wet method, reaction spinning and melt spinning; when traditional spandex silk is processed, the raw materials that use are: polyether diol and diisocyanate are mixed according to a certain proportion and then dissolved to obtain a spinning solution, and then the spinning solution is subjected to spinning, cohesion and oiling treatment to obtain final spandex filaments;
the following technical problems can occur in the specific operation process:
firstly, after polyether diol and diisocyanate are mixed, diamine needs to be added again for treatment; secondly, after the auxiliary agent and the copolymer solution are mixed, precipitation treatment is carried out, and more sol particles appear in the process, so that the quality of the final spandex filament is influenced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a production process of high-strength spandex yarns, which solves the problems in the prior art.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
a production process of high-strength spandex filaments comprises the following steps:
preparation of a copolymer: selecting polyether diol, diisocyanate and diamine as raw materials, stirring and mixing the polyether diol and the diisocyanate according to a molar ratio of 1-2:2 to obtain a copolymer solution,
wherein, the diamine is filled in a plurality of capsules with hot melt;
preparing a spinning solution: adding an auxiliary agent into the copolymer solution, and then processing to obtain spinning stock solution with uniform and consistent performance;
wire pressing and collecting: and quantitatively and uniformly pressing the spinning solution into a spinning nozzle by using a metering pump to obtain a plurality of multifilaments, cohering the multifilaments by using a twisting device, oiling and rolling the multifilaments on the surface of a winding roller.
Further, in the process of preparing the copolymer,
the proportion of the polyether glycol and the diisocyanate is 1:1, a stirring drum with a stirring motor is used during stirring treatment, the rotating speed of the stirring motor is 100-500r/min, the total stirring time is 10min, and a heater for heating materials is further arranged on the stirring drum.
Further, during the stirring:
firstly, fully stirring polyether glycol, diisocyanate and a plurality of unbroken capsules at the speed of 500 r/min;
then, when the set stirring time is up, automatically starting a heater, and stirring the polyether glycol, the diisocyanate and the damaged capsules at the speed of 100 r/min;
finally, a copolymer solution was obtained after the set stirring time was reached.
Further, a chain extension reaction is generated between the diamine and the polyether diol and diisocyanate which are preliminarily mixed,
the copolymer solution formed is a block copolymer solution.
Further, in the process of preparing the spinning solution,
the added auxiliary agent comprises an antioxidant, a cross-linking agent, an anti-yellowing agent and thermoplasticity, and the preparation method of the auxiliary agent comprises the following specific steps:
s1, mixing the antioxidant, the cross-linking agent and the anti-yellowing agent according to the mass part ratio of 1:1: 2;
s2, standing the mixture obtained in the step S1 at the temperature of 40-50 ℃;
and S3, obtaining the final auxiliary agent.
Furthermore, the cross-linking agent accounts for 1-10% of the whole spinning solution by mass.
Further, in the process of preparing the spinning solution,
and mixing the auxiliary agent and the copolymer solution, then carrying out primary filtration, carrying out defoaming treatment, and carrying out secondary filtration to finally obtain the spinning solution.
The method comprises the following steps of:
s1, primary filtration, wherein a 200-mesh and 300-mesh filter screen is used, and stainless steel sand is added into the filter screen;
s2, defoaming, namely feeding the mixed solution after primary filtration into a defoaming machine to obtain a defoamed solution;
and S3, secondary filtration, namely, passing the defoamed solution through a filter screen with 100-200 meshes, heating the filter screen, and carrying out primary preheating treatment on the obtained spinning solution.
Furthermore, in the process of pressing and collecting the silk,
a plurality of filament trickle is sprayed from a spinning nozzle and taken away by inert gas, the concentration of the filament is improved until the filament is solidified, and a twisting device is used before the solidification;
just rolling up to the winding up roller surface after oiling through the crosswind region, installing the crosswind blower in this department crosswind region, the wind speed of this fan is: 0.1-0.2 m/s.
Furthermore, in the process of pressing and collecting the silk,
the oil is prepared from 100% pure oil.
(III) advantageous effects
Firstly, in the process of preparing the copolymer, the polyether glycol, the diisocyanate and the diamine are mixed and stirred, the polyether glycol and the diisocyanate are fully mixed by primary stirring, and the diamine and the mixture during primary stirring are fully mixed by secondary stirring, so that the operation step of adding the diamine again is saved, and the working efficiency of the production process is improved;
secondly, the auxiliary agent and the copolymer solution are subjected to filtration twice in the mixing process, the macromolecular gel in the mixed solution can be dispersed by one-time filtration, larger impurities can be removed, the micromolecular gel can be dispersed by the second-time filtration, and the influence on the product quality caused by the large amount of gel particles mixed in the obtained spinning solution can be avoided;
thirdly, the side blowing treatment is carried out before the wound multifilament is wound, so that on one hand, the strength of the multifilament can be detected, unqualified multifilament can be removed, on the other hand, the drying treatment of the oiled spandex filament can be completed, the uniformity of the oiled spandex filament can be ensured, and meanwhile, the oil content of the spandex filament can be controlled.
Drawings
FIG. 1 is a flow chart of the overall production process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 addition, for the convenience of description, the terms "upper", "lower", "left" and "right" are used to refer to the same direction as the upper, lower, left, right, etc. of the drawings, and the terms "first", "second", etc. are used for descriptive distinction and have no special meaning.
Example (b):
the embodiment provides a specific process of spandex filament, and as shown in fig. 1, a production process of high-strength spandex filament comprises the following steps:
preparation of a copolymer: selecting polyether diol, diisocyanate and diamine as raw materials, stirring and mixing the polyether diol and the diisocyanate according to a molar ratio of 1-2:2 to obtain a copolymer solution,
wherein, the diamine is filled in a plurality of capsules with hot melt;
the proportion of the polyether glycol to the diisocyanate is 1:1, a stirring drum with a stirring motor is used during stirring treatment, the rotating speed of the stirring motor is 100-500r/min, the total stirring time is 10min, and a heater for heating materials is further arranged on the stirring drum.
During the stirring:
firstly, fully stirring polyether glycol, diisocyanate and a plurality of unbroken capsules at the speed of 500 r/min;
then, when the set stirring time is up, automatically starting a heater, and stirring the polyether glycol, the diisocyanate and the damaged capsules at the speed of 100 r/min;
finally, a copolymer solution was obtained after the set stirring time was reached.
Specifically, a chain extension reaction occurs between the diamine and the polyether diol and diisocyanate which are preliminarily mixed, and the resulting copolymer solution is a block copolymer solution.
Preparing a spinning solution: adding an auxiliary agent into the copolymer solution, and then processing to obtain spinning stock solution with uniform and consistent performance;
in the process of preparing the spinning dope,
the added auxiliary agent comprises an antioxidant, a cross-linking agent, an anti-yellowing agent and thermoplasticity, and the preparation method of the auxiliary agent comprises the following specific steps:
s1, mixing the antioxidant, the cross-linking agent and the anti-yellowing agent according to the mass part ratio of 1:1: 2;
s2, standing the mixture obtained in the step S1 at the temperature of 40 ℃;
and S3, obtaining the final auxiliary agent.
Table 1:
the cross-linking agent accounts for 1-10% of the whole spinning solution by mass.
The table above shows the spinning temperature of spandex filament at different mass fractions of cross-linking agent,
from the above table it can be seen that:
the mass fraction of the cross-linking agent is in inverse proportion to the spinning temperature;
specifically, when the amount of the crosslinking agent added is 5 parts, the crosslinking agent is added
In the process of preparing the spinning dope,
and mixing the auxiliary agent and the copolymer solution, then carrying out primary filtration, carrying out defoaming treatment, and carrying out secondary filtration to finally obtain the spinning solution.
In the process of mixing the auxiliary agent and the copolymer solution, the method comprises the following specific steps:
s1, primary filtering, namely using a 300-mesh filter screen, wherein the filter screen is added with stainless steel sand;
s2, defoaming, namely feeding the mixed solution after primary filtration into a defoaming machine to obtain a defoamed solution;
s3, secondary filtration, namely, enabling the defoamed solution to pass through a 200-mesh filter screen, heating the filter screen, and carrying out primary preheating treatment on the obtained spinning solution;
by adopting the technical scheme:
according to the invention, two times of filtering treatment are carried out in the process of mixing the auxiliary agent and the copolymer solution, the macromolecular gel in the mixed solution can be dispersed by one-time filtering, larger magazines can be removed, the micromolecular gel can be dispersed by the second-time filtering, and the problem that the quality of the product is influenced by mixing a large amount of gel particles in the obtained spinning solution is avoided.
Wire pressing and collecting: and quantitatively and uniformly pressing the spinning solution into a spinning nozzle by using a metering pump to obtain a plurality of multifilaments, cohering the multifilaments by using a twisting device, oiling and rolling the multifilaments on the surface of a winding roller.
In the process of pressing and collecting the silk,
a plurality of filament trickle is sprayed from a spinning nozzle and taken away by inert gas, the concentration of the filament is improved until the filament is solidified, and a twisting device is used before the solidification;
just rolling up to the winding up roller surface after oiling through the crosswind region, installing the crosswind blower in this department crosswind region, the wind speed of this fan is: 0.1 m/s.
By adopting the technical scheme:
the side blowing treatment is carried out before the wound multifilament is wound, so that the strength of the multifilament can be detected, unqualified multifilament can be removed, the drying treatment of the oiled spandex filament can be completed, the oiled uniformity of the spandex filament can be ensured, and the oil content of the spandex filament can be controlled
Specifically, within a certain range, the spinning speed is increased, which is beneficial to improving the strength and elastic recovery rate of finished yarns; in the production of spandex yarn, the spinning speed of 700m/min is selected in the embodiment in consideration of the factors in the operation performance of equipment;
the cross air blowing condition has great influence on the evenness unevenness and the elongation unevenness of the spandex yarn; the side blowing conditions mainly comprise side blowing wind speed, wind temperature and humidity; in the actual production, the side blowing condition is controlled to be 0.1-0.2 mls of wind speed, 25 ℃ of wind temperature and 65% of relative humidity, and the produced spandex strand silk is low in unevenness rate.
In the process of pressing and collecting the silk, 100% pure oil is used for oiling.
Finally, the performance of the spandex filament is detected as follows:
meanwhile, the elongation at break of the spandex filament at different spinning temperatures in the example is also detected as follows:
table 2:
from the test results it can be seen that:
when the spinning temperature is 180-189 ℃, the breaking elongation and the modulus of the spandex are relatively stable, which is beneficial to the smooth proceeding of subsequent processing.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A production process of high-strength spandex filaments is characterized by comprising the following steps:
preparation of a copolymer: selecting polyether diol, diisocyanate and diamine as raw materials, stirring and mixing the polyether diol and the diisocyanate according to a molar ratio of 1-2:2 to obtain a copolymer solution,
wherein, the diamine is filled in a plurality of capsules with hot melt;
preparing a spinning solution: adding an auxiliary agent into the copolymer solution, and then processing to obtain spinning stock solution with uniform and consistent performance;
wire pressing and collecting: and quantitatively and uniformly pressing the spinning solution into a spinning nozzle by using a metering pump to obtain a plurality of multifilaments, cohering the multifilaments by using a twisting device, oiling and rolling the multifilaments on the surface of a winding roller.
2. The process for producing high-strength spandex filaments according to claim 1, wherein: in the process for the preparation of the copolymer,
the proportion of the polyether glycol and the diisocyanate is 1:1, a stirring drum with a stirring motor is used during stirring treatment, the rotating speed of the stirring motor is 100-500r/min, the total stirring time is 10min, and a heater for heating materials is further arranged on the stirring drum.
3. The process for producing high-strength spandex filaments according to claim 2, wherein: during the stirring:
firstly, fully stirring polyether glycol, diisocyanate and a plurality of unbroken capsules at the speed of 500 r/min;
then, when the set stirring time is up, automatically starting a heater, and stirring the polyether glycol, the diisocyanate and the damaged capsules at the speed of 100 r/min;
finally, a copolymer solution was obtained after the set stirring time was reached.
4. The process for producing high-strength spandex filaments according to claim 1, wherein: the diamine generates a chain extension reaction with the polyether diol and diisocyanate which are preliminarily mixed,
the copolymer solution formed is a block copolymer solution.
5. The process for producing high-strength spandex filaments according to claim 1, wherein: in the process of preparing the spinning dope,
the added auxiliary agent comprises an antioxidant, a cross-linking agent, an anti-yellowing agent and thermoplasticity, and the preparation method of the auxiliary agent comprises the following specific steps:
s1, mixing the antioxidant, the cross-linking agent and the anti-yellowing agent according to the mass part ratio of 1:1: 2;
s2, standing the mixture obtained in the step S1 at the temperature of 40-50 ℃;
and S3, obtaining the final auxiliary agent.
6. The process for producing high-strength spandex filaments according to claim 1, wherein: the cross-linking agent accounts for 1-10% of the whole spinning solution in parts by mass.
7. The process for producing high-strength spandex filaments according to claim 1, wherein: in the process of preparing the spinning dope,
and mixing the auxiliary agent and the copolymer solution, then carrying out primary filtration, carrying out defoaming treatment, and carrying out secondary filtration to finally obtain the spinning solution.
8. The process for producing high-strength spandex filaments according to claim 7, wherein: in the process of mixing the auxiliary agent and the copolymer solution, the method comprises the following specific steps:
s1, primary filtration, wherein a 200-mesh and 300-mesh filter screen is used, and stainless steel sand is added into the filter screen;
s2, defoaming, namely feeding the mixed solution after primary filtration into a defoaming machine to obtain a defoamed solution;
and S3, secondary filtration, namely, passing the defoamed solution through a filter screen with 100-200 meshes, heating the filter screen, and carrying out primary preheating treatment on the obtained spinning solution.
9. The process for producing high-strength spandex filaments according to claim 1, wherein: in the process of the wire pressing and winding-up,
a plurality of filament trickle is sprayed from a spinning nozzle and taken away by inert gas, the concentration of the filament is increased until the filament is solidified, and the twister is used before the solidification;
just rolling up to the winding up roller surface after oiling through the crosswind region, installing the crosswind blower in this department crosswind region, the wind speed of this fan is: 0.1-0.2 m/s.
10. The process for producing high-strength spandex filaments according to claim 1, wherein: in the process of the wire pressing and winding-up,
the oil is prepared from 100% pure oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111214078.XA CN113897702A (en) | 2021-10-19 | 2021-10-19 | Production process of high-strength spandex filament |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111214078.XA CN113897702A (en) | 2021-10-19 | 2021-10-19 | Production process of high-strength spandex filament |
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| CN113897702A true CN113897702A (en) | 2022-01-07 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1038739A (en) * | 1964-05-05 | 1966-08-10 | Ncr Co | Polyurethane foam-producing composition |
| CN109487361A (en) * | 2018-11-23 | 2019-03-19 | 万华化学集团股份有限公司 | Spandex fibre and preparation method with good heat resistance and low temperature shape stability |
-
2021
- 2021-10-19 CN CN202111214078.XA patent/CN113897702A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1038739A (en) * | 1964-05-05 | 1966-08-10 | Ncr Co | Polyurethane foam-producing composition |
| CN109487361A (en) * | 2018-11-23 | 2019-03-19 | 万华化学集团股份有限公司 | Spandex fibre and preparation method with good heat resistance and low temperature shape stability |
Non-Patent Citations (2)
| Title |
|---|
| DETLEF GNEUΒ: ""弹性纤维生产中的过滤"", 《合成纤维》, pages 48 - 49 * |
| 梁斌等: ""氨纶生产工艺技术研究进展"", 《广州化工》, vol. 44, no. 2, pages 9 * |
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Application publication date: 20220107 |