CN115449904B - Preparation method of spandex with excellent unwinding property for sanitary material - Google Patents
Preparation method of spandex with excellent unwinding property for sanitary material Download PDFInfo
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- CN115449904B CN115449904B CN202211189022.8A CN202211189022A CN115449904B CN 115449904 B CN115449904 B CN 115449904B CN 202211189022 A CN202211189022 A CN 202211189022A CN 115449904 B CN115449904 B CN 115449904B
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- 229920002334 Spandex Polymers 0.000 title claims abstract description 61
- 239000004759 spandex Substances 0.000 title claims abstract description 61
- 239000000463 material Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000004005 microsphere Substances 0.000 claims abstract description 74
- 229920000642 polymer Polymers 0.000 claims abstract description 48
- 238000009987 spinning Methods 0.000 claims abstract description 31
- 239000000243 solution Substances 0.000 claims abstract description 30
- 239000000835 fiber Substances 0.000 claims abstract description 22
- 239000006185 dispersion Substances 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 239000004814 polyurethane Substances 0.000 claims abstract description 16
- 229920002635 polyurethane Polymers 0.000 claims abstract description 16
- 239000003960 organic solvent Substances 0.000 claims abstract description 14
- 239000011550 stock solution Substances 0.000 claims abstract description 14
- 239000002736 nonionic surfactant Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 238000001704 evaporation Methods 0.000 claims abstract description 7
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims abstract description 3
- 229920002845 Poly(methacrylic acid) Polymers 0.000 claims description 11
- -1 polypropylene Polymers 0.000 claims description 11
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 10
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 8
- 241001589086 Bellapiscis medius Species 0.000 claims description 7
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 7
- 239000000194 fatty acid Substances 0.000 claims description 7
- 229930195729 fatty acid Natural products 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 229920001214 Polysorbate 60 Polymers 0.000 claims description 4
- 150000002191 fatty alcohols Chemical class 0.000 claims description 4
- 229920001610 polycaprolactone Polymers 0.000 claims description 4
- 239000004632 polycaprolactone Substances 0.000 claims description 4
- 239000004417 polycarbonate Substances 0.000 claims description 4
- 229920000515 polycarbonate Polymers 0.000 claims description 4
- ZORQXIQZAOLNGE-UHFFFAOYSA-N 1,1-difluorocyclohexane Chemical compound FC1(F)CCCCC1 ZORQXIQZAOLNGE-UHFFFAOYSA-N 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- 150000004665 fatty acids Chemical class 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000001593 sorbitan monooleate Substances 0.000 claims description 3
- 229940035049 sorbitan monooleate Drugs 0.000 claims description 3
- 235000011069 sorbitan monooleate Nutrition 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 abstract description 2
- 230000010355 oscillation Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 5
- 230000032683 aging Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- 239000008041 oiling agent Substances 0.000 description 1
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 1
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- 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
- D01D1/02—Preparation of spinning solutions
-
- 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
- D01D1/06—Feeding liquid to the spinning head
-
- 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
- D01D1/10—Filtering or de-aerating the spinning solution or melt
- D01D1/106—Filtering
-
- 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
- D01D5/04—Dry spinning methods
-
- 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
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/30—Moistening, sizing, oiling, waxing, colouring, or drying yarns or the like as incidental measures during spinning or twisting
- D01H13/306—Moistening, sizing, oiling, waxing, colouring, or drying yarns or the like as incidental measures during spinning or twisting by applying fluids, e.g. steam or oiling liquids
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
- D02G1/04—Devices for imparting false twist
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Artificial Filaments (AREA)
Abstract
The invention relates to a preparation method of spandex for a sanitary material with excellent unwinding property, which selects a polymer microsphere material as an auxiliary agent for improving the unwinding property of the spandex for the sanitary material; firstly mixing the polymer microsphere with an organic solvent, adding a nonionic surfactant, forming uniform polymer microsphere dispersion liquid by means of an ultrasonic oscillation technology, and then mixing the polymer microsphere dispersion liquid with a polyurethane solution to obtain a spinning stock solution; filtering the spinning solution, and evaporating to remove the organic solvent by using a high Wen Yongdao to form a nascent fiber; and performing false twisting and oiling treatment on the primary fiber to finally obtain the spandex for the sanitary material. The polymer microspheres can form arc-shaped protruding structures on the surfaces of the spandex fibers, so that the contact area between fibers can be reduced, and the formation of adhesion effect is lightened; by utilizing the special self-lubricating effect of the polymer microsphere, the fiber can still have good mutual isolation under the condition of low oil content, thereby ensuring that the filament coil is completely and smoothly unwound from the outside to the inside.
Description
Technical Field
The invention belongs to a preparation method of spandex, and particularly relates to a preparation method of spandex for a sanitary material with excellent unwinding property.
Background
Generally, spandex used for sanitary articles such as diapers and pull-ups is called sanitary spandex. The spandex for the sanitary material is different from the common spandex in two aspects: firstly, the package forming is large. The paper diaper has high production speed, and the use speed of spandex reaches hundreds to thousands of meters per minute. In order to match with the efficient and rapid production mode, the frequent stop of production workers for receiving and changing materials is avoided, and the coiling weight of the spandex for the sanitary material is generally 3.0-4.5 kg. Secondly, the oil content is low. In the production process of paper diapers, spandex is fixed on a base material such as non-woven fabrics through hot melt adhesives. The excessively high oil content on the surface of the spandex can cause that the spandex can not form firm bonding effect with a base material, so that the problems of the disposable diaper such as spring losing, side leakage and the like caused by slippage and falling of the spandex are caused. However, the larger the package weight of the spandex product for sanitary materials is, the lower the self oil content is, the larger the mutual stacking and extrusion effect inside the silk roll is, and the more serious the adhesion effect between the silk is, so that the spandex for sanitary materials is easily transported at the height Wen Changtu or placed for a long time, the middle-inner silk thread cannot be normally and smoothly unwound, and further the production faults such as silk breakage and shutdown are frequently caused.
To solve this problem, conventional stearate (CN 101778644 a) and oleamide type lubricants are used to prepare spandex for sanitary use. However, the use of such lubricants in large amounts solves the problem of unwinding, but also easily causes a series of other problems such as "splitting", "spider-web" of the product and loosening and slipping of the surface threads. To improve unwinding smoothness, 0.1 to 25wt% of cellulose ester was added by Inward/Widada (CN 102362020A). The addition of the cellulose ester can effectively reduce the viscosity of the spandex, improve the shelf life of the spandex, ensure smooth and uniform delivery of the spandex in the unwinding process and reduce the possibility of yarn breakage.
Polymeric microsphere materials refer to polymeric particles having a spherical shape and a particle size in the scale range of tens of nanometers to hundreds of micrometers. The polymer microsphere has the characteristics of small particle size, large specific surface area, good dispersibility, strong hydrophobicity and the like, and has good application and development prospects in the fields of biological medicines, papermaking, rubber, auxiliary agents, adhesives, cosmetics, building materials and the like. However, no document has reported the use of polymeric microspheres as an additive for spandex production to improve the unwindability of spandex.
Disclosure of Invention
Technical problems: the invention provides a preparation method of spandex for a sanitary material with excellent unwinding property, and aims to solve the problems that the spandex for the sanitary material is easy to adhere, poor in unwinding smoothness, easy to break and the like after being placed for a long time under the conditions of large package and low oil content.
The technical scheme is as follows: in order to solve the technical problems, the preparation method of the spandex for the sanitary material with excellent unwinding property comprises the following steps: polymer microsphere materials are selected as an auxiliary agent for improving the unwinding property of spandex for the sanitary material; firstly, mixing the polymer microsphere, a nonionic surfactant and an organic solvent to form uniform polymer microsphere dispersion liquid, and then mixing the polymer microsphere dispersion liquid with a polyurethane solution to obtain a spinning stock solution; filtering the spinning solution, and evaporating to remove the organic solvent by using a high Wen Yongdao to form a nascent fiber; and performing false twisting and oiling treatment on the primary fiber to finally obtain the spandex for the sanitary material.
The preparation method comprises the following specific steps:
Step 1, adding polymer microspheres, a nonionic surfactant and an organic solvent into a container, uniformly mixing by using a mechanical stirrer, and then treating by using an ultrasonic vibration dispersing instrument to obtain uniformly mixed polymer microsphere dispersion;
Step 2, adding the polymer microsphere dispersion liquid into polyurethane solution, and stirring for 12-24 hours at a constant temperature of 40-50 ℃ to obtain spandex spinning stock solution;
Step 3, removing agglomerated polymer microspheres and other impurities from the spandex spinning stock solution through a filter, and conveying the polymer microspheres and other impurities to a spinneret plate assembly through a conveying pump to form stock solution trickles; evaporating the organic solvent from the stock solution fine flow through a high-temperature spinning channel to obtain nascent fibers;
And 4, twisting and embracing the primary fibers by an air false twister to form a bundle, coating the bundle with a spinning oil solution cooled in advance by an oiling roller, and winding the bundle by a winding machine to obtain the spandex for the sanitary material.
The polymer microsphere is one or a combination of more of polypropylene microsphere, polymethacrylic acid microsphere, polycarbonate microsphere, polylactic acid-glycolic acid microsphere or polycaprolactone microsphere.
The diameter of the polymer microsphere is 1.0-5.0 micrometers.
The nonionic surfactant is one or a combination of more of fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, alkylphenol polyoxyethylene ether, fatty amine polyoxyethylene ether, sorbitan monooleate or polyoxyethylene sorbitan fatty acid ester.
The mass ratio of the nonionic surfactant to the polymer microsphere is 1: 200-1: 20.
The mass concentration of the polymer microsphere dispersion liquid is 5.0-20.0%.
The viscosity of the polyurethane solution is 1000-2000 poise, and the mass concentration is 25-35%; the viscosity of the polyurethane spinning solution after constant temperature stirring is 3000-4000 poise.
The mass ratio of the polymer microsphere dispersion liquid to the polyurethane solution is 0.5:99.5 to 5.0:95.0.
The length of the false twist balloon of the air false twister is 10-20 mm.
The use temperature of the spinning oil is 5-15 ℃, and the mass ratio of the spinning oil coated on the spandex is 0.1-1.0%.
The beneficial effects are that: the invention adopts polymer microspheres as an auxiliary agent for improving the unwinding property of spandex for sanitary materials. By adding the polymer microspheres, an arc-shaped protruding structure is formed on the surface of the spandex fiber, so that the contact area between the fibers is effectively reduced, and the formation of adhesion is lightened; by utilizing the special self-lubricating effect of the polymer microsphere, the fiber can still have good mutual isolation under the condition of low oil content, thereby ensuring that the filament coil is completely and smoothly unwound from the outside to the inside. In addition, the long balloon length is used for false twisting and the low-temperature oiling agent is used for coating the spandex in the spinning process, so that the residues of the organic solvent in the fiber are reduced, the cooling and shaping of each component in the fiber are accelerated, and the phenomenon of bottom adhesion in a silk roll is reduced.
Detailed Description
The specific implementation of the invention comprises the following steps:
And step 1, adding the polymer microsphere, the nonionic surfactant and the organic solvent into a container according to a proportion, mixing for 1-2 hours by using a mechanical stirrer, and then treating for 1-3 hours by using an ultrasonic vibration dispersing instrument to obtain a polymer microsphere dispersion liquid.
Step 2, adding the polymer microsphere dispersion liquid into polyurethane solution according to a proportion, and stirring for 12-24 hours at a constant temperature of 40-50 ℃ to obtain spinning solution;
step 3, the spandex spinning dope is passed through a filter with a filter diameter of 20-50 microns and then is conveyed to a spinneret plate assembly through a conveying pump to form dope trickles; evaporating the organic solvent from the stock solution trickle through a spinning channel at the temperature of 250-260 ℃ to obtain nascent fibers;
And 4, twisting and embracing the primary fibers by an air false twister to form a bundle, coating the bundle with a spinning oil solution cooled in advance by an oiling roller, and finally winding the bundle by a winding machine to obtain the spandex for the sanitary material.
Wherein:
the adopted polymer microsphere is one or a combination of more of polypropylene microsphere, polymethacrylic acid microsphere, polycarbonate microsphere, polylactic acid-glycolic acid microsphere and polycaprolactone microsphere; the diameter of the polymer microsphere is 1.0-5.0 micrometers.
The adopted nonionic surfactant is one or a combination of more of fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, alkylphenol polyoxyethylene ether, fatty amine polyoxyethylene ether, sorbitan monooleate and polyoxyethylene sorbitan fatty acid ester; the mass ratio of the nonionic surfactant to the polymer microsphere is 1: 200-1: 20.
The mass concentration of the prepared polymer microsphere dispersion liquid is 5.0-20.0%.
The viscosity of the polyurethane solution is 1000-2000 poise, and the mass concentration is 25-35%; the viscosity of the spinning solution after constant temperature stirring is 3000-4000 poise.
The mass ratio of the adopted polymer microsphere solution to the polyurethane solution is 0.5/99.5-5.0/95.0.
The false twist balloon length of the adopted air false twister is 10-20 mm.
The use temperature of the adopted spinning oil is 5-15 ℃, and the mass ratio of the oil coated on the spandex is 0.1-1.0%.
Example 1
100G of polymethacrylic acid microsphere with the diameter of 2 microns and 1g of fatty alcohol polyoxyethylene ether are taken and added into a container with 1000g of ethanol, the mixture is stirred and mixed for 1 hour at a high speed, and then ultrasonic oscillation treatment is carried out for 1 hour, so as to obtain the polymethacrylic acid microsphere dispersion liquid with the mass concentration of 10%. Adding the polymethacrylic acid microsphere dispersion liquid into a polyurethane solution with the viscosity of 1250 poise, wherein the mass ratio of the polymethacrylic acid microsphere dispersion liquid to the polyurethane solution is 2.0/98.0, and stirring and mixing for 24 hours at the constant temperature of 45 ℃ to obtain a spinning solution. Removing impurities and agglomerated polymethacrylic acid microspheres from the spinning solution through a filter with a filter diameter of 20 microns, and conveying the solution to a spinneret plate assembly through a conveying pump to form a stock solution trickle; evaporating the organic solvent from the stock solution trickle through a spinning channel at 260 ℃ to obtain nascent fibers; twisting and embracing the primary fiber by a false twister with a balloon length of 20mm to form a bundle, coating spinning oil solution with a mass ratio of 0.5% and a temperature of 10 ℃ by an oiling roller, and finally winding by a winding machine to obtain the spandex sample 1 for the sanitary material.
Example 2
The same experimental method as in example 1 was used, except that the polymer microsphere selected was polycaprolactone microsphere, to obtain spandex sample 2 for sanitary material.
Example 3
The same experimental method as in example 1 was employed, except that the polymer microsphere selected was a polycarbonate microsphere and the nonionic surfactant selected was a polyoxyethylene sorbitan fatty acid ester, to obtain a spandex sample 3 for sanitary ware.
Example 4
The same experimental method as in example 1 was used, except that the mass ratio of the dispersion of the polymethacrylic acid microspheres to the polyurethane solution was 4.0/96.0, to obtain a spandex sample for sanitary ware 4.
Comparative example 1
The same experimental method as in example 1 was employed, except that the polymethacrylic acid microspheres were not added, and a comparative spandex sample 1 for sanitary materials was obtained.
Comparative example 2
The same experimental method as in example 1 was employed, except that a non-microsphere-structured polymethacrylic acid was added, to obtain a comparative spandex sample 2 for sanitary materials.
The test of unwinding tension was performed on the example samples and the comparative samples. The unwinding tension represents the interaction force between the wires in the unwinding process, and the smaller the tension value is, the smaller the adhesion effect is, and the better the unwinding property is. Unwinding tension was measured at three locations of the surface layer, middle layer and inner layer of the sample, respectively, as shown in table 1 below:
table 1 example sample and comparative sample unwind tension control table
The samples of the examples and the comparative samples were subjected to high temperature aging treatment at 50℃for 30 days, the simulated samples were left to stand at room temperature for 1 year, and the unwinding tension of the inner layer in the surface of the samples after aging was also measured, and the results are shown in Table 2:
TABLE 2 comparative sample unwind tension Table for example samples and comparative samples after aging treatment
。
Claims (7)
1. A preparation method of spandex for sanitary materials with excellent unwinding property is characterized in that polymer microsphere materials are selected as an auxiliary agent for improving the unwinding property of the spandex for sanitary materials; firstly, mixing the polymer microsphere, a nonionic surfactant and an organic solvent to form uniform polymer microsphere dispersion liquid, and then mixing the polymer microsphere dispersion liquid with a polyurethane solution to obtain a spinning stock solution; filtering the spinning solution, and evaporating to remove the organic solvent by using a high Wen Yongdao to form a nascent fiber; performing false twisting and oiling treatment on the primary fiber to finally obtain spandex for the sanitary material;
The polymer microsphere is one or a combination of more of polypropylene microsphere, polymethacrylic acid microsphere, polycarbonate microsphere, polylactic acid-glycolic acid microsphere or polycaprolactone microsphere; the diameter of the polymer microsphere is 1.0-5.0 micrometers;
the nonionic surfactant is one or a combination of more of fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, alkylphenol polyoxyethylene ether, fatty amine polyoxyethylene ether, sorbitan monooleate or polyoxyethylene sorbitan fatty acid ester;
The mass ratio of the nonionic surfactant to the polymer microsphere is 1: 200-1: 20.
2. The method for preparing spandex for sanitary ware with excellent unwinding property according to claim 1, characterized by comprising the following specific steps:
Step 1, adding polymer microspheres, a nonionic surfactant and an organic solvent into a container, uniformly mixing by using a mechanical stirrer, and then treating by using an ultrasonic vibration dispersing instrument to obtain uniformly mixed polymer microsphere dispersion;
Step 2, adding the polymer microsphere dispersion liquid into polyurethane solution, and stirring for 12-24 hours at the constant temperature of 40-50 ℃ to obtain spandex spinning stock solution;
step 3, removing agglomerated polymer microspheres and other impurities from the spandex spinning stock solution through a filter, and conveying the polymer microspheres and other impurities to a spinneret plate assembly through a conveying pump to form stock solution trickles; evaporating the organic solvent from the stock solution fine flow through a high-temperature spinning channel to obtain nascent fibers;
and 4, twisting and embracing the primary fibers by an air false twister to form a bundle, coating the bundle with a spinning oil solution cooled in advance by an oiling roller, and winding the bundle by a winding machine to obtain the spandex for the sanitary material.
3. The method for producing spandex for sanitary ware having excellent unwinding property according to claim 2, wherein the mass concentration of the polymer microsphere dispersion is 5.0 to 20.0%.
4. The method for preparing spandex for sanitary ware with excellent unwinding property according to claim 2, wherein the polyurethane solution has a viscosity of 1000-2000 poise and a mass concentration of 25-35%; the viscosity of the spandex spinning solution after constant temperature stirring is 3000-4000 poise.
5. The method for preparing spandex for sanitary ware with excellent unwinding property according to claim 2, wherein the mass ratio of the polymer microsphere dispersion liquid to the polyurethane solution is 0.5:99.5 to 5.0:95.0.
6. The method for producing spandex for sanitary ware having excellent unwinding property according to claim 2, wherein the false twist balloon length of the air false twister is 10 to 20mm.
7. The method for preparing spandex for a sanitary material with excellent unwinding property according to claim 2, wherein the use temperature of the spinning oil is 5-15 ℃, and the mass ratio of the spinning oil coated on the spandex is 0.1-1.0%.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110453305A (en) * | 2019-09-26 | 2019-11-15 | 浙江华峰氨纶股份有限公司 | A kind of preparation method of the compound polyurethane elastomeric fiber of low cost |
| CN113005559A (en) * | 2021-03-05 | 2021-06-22 | 华峰重庆氨纶有限公司 | Preparation method of nano-modified spandex easy to unwind |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100200423B1 (en) * | 1997-02-17 | 1999-06-15 | 한형수 | The manufacture method of the polyurethane elastic fiber |
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