CN117385484A - Melt spinning phase-change fiber preparation method, melt spinning equipment and phase-change fiber - Google Patents
Melt spinning phase-change fiber preparation method, melt spinning equipment and phase-change fiber Download PDFInfo
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- CN117385484A CN117385484A CN202311125023.0A CN202311125023A CN117385484A CN 117385484 A CN117385484 A CN 117385484A CN 202311125023 A CN202311125023 A CN 202311125023A CN 117385484 A CN117385484 A CN 117385484A
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- 239000000835 fiber Substances 0.000 title claims abstract description 63
- 238000002074 melt spinning Methods 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000000155 melt Substances 0.000 claims abstract description 50
- 239000011347 resin Substances 0.000 claims abstract description 44
- 229920005989 resin Polymers 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000010008 shearing Methods 0.000 claims abstract description 32
- 238000001125 extrusion Methods 0.000 claims abstract description 28
- 238000009987 spinning Methods 0.000 claims abstract description 22
- 239000012792 core layer Substances 0.000 claims abstract description 10
- 239000010410 layer Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 230000008859 change Effects 0.000 claims description 36
- 238000002844 melting Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 16
- 230000008018 melting Effects 0.000 claims description 13
- 229920000728 polyester Polymers 0.000 claims description 11
- 238000004898 kneading Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 239000012782 phase change material Substances 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 5
- 239000003094 microcapsule Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000002202 Polyethylene glycol Substances 0.000 claims description 2
- 230000009471 action Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229920002961 polybutylene succinate Polymers 0.000 claims description 2
- 239000004631 polybutylene succinate Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920001223 polyethylene glycol Polymers 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 239000012071 phase Substances 0.000 description 21
- 239000000306 component Substances 0.000 description 6
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 229920006052 Chinlon® Polymers 0.000 description 3
- 229920004933 Terylene® Polymers 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229920013716 polyethylene resin Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- 229920002292 Nylon 6 Polymers 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- ZOMSMJKLGFBRBS-UHFFFAOYSA-N bentazone Chemical compound C1=CC=C2NS(=O)(=O)N(C(C)C)C(=O)C2=C1 ZOMSMJKLGFBRBS-UHFFFAOYSA-N 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000010128 melt processing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate 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
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/34—Core-skin structure; Spinnerette packs therefor
-
- 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
-
- 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
- D01D1/065—Addition and mixing of substances to the spinning solution or to the melt; Homogenising
-
- 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
- D01D5/08—Melt 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
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
-
- 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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
-
- 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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The invention discloses a preparation method of melt spinning phase-change fibers, melt spinning equipment and phase-change fibers, wherein the preparation method of the melt spinning phase-change fibers comprises the following steps: s1, adding resin A into a multiple high-frequency shearing melt extrusion system to melt; s2, mixing the resin A with the phase-change modified material when the resin A is in a semi-molten state, shearing the resin A melt and the phase-change modified material at a high speed in a melt pipeline of a multiple high-frequency shearing and melt extrusion system to form a uniform mixed melt, removing water and micromolecular volatile matters volatilized in the melt, pressurizing by a melt pump and metering by a metering pump, and conveying to a spinning box; s3, conveying the resin B to a spinning box body through a single screw extruder; s4, co-extruding the resin A and the resin B to form the phase-change fiber with the sheath-core structure, wherein the resin A forms a core layer containing the phase-change modified material, and the resin B forms a skin layer.
Description
Technical Field
The invention relates to a method and a material for preparing a phase-change modified resin melt and a phase-change fiber by utilizing a melt spinning online addition devolatilization technology, belonging to the technical fields of material processing molding and fiber preparation. .
Background
The energy-storage temperature-regulating textile is a novel functional textile with a bidirectional temperature regulating function, which is manufactured by utilizing a phase-change technology, and can automatically absorb or release heat according to the change of the external temperature so as to reduce the temperature fluctuation of the body surface microenvironment, thereby ensuring the comfort of a human body, avoiding pathological reaction caused by the temperature fluctuation, saving energy and reducing emission and realizing the recycling of energy. The product has been industrialized in solution spinning at home and abroad, and the produced heat-accumulating temperature-regulating acrylic fiber and viscose fiber have been widely applied to the fields of high-end, special clothing, home textile and the like. However, the technology does not make an industrial breakthrough on chemical fibers such as terylene, chinlon and the like with the market ratio of up to 70 percent.
The existing method for preparing terylene and chinlon phase-change fibers by melt spinning in China mainly comprises the steps of preparing phase-change modified resin slices, and further preparing the phase-change fibers by melt spinning. However, the method and the process have poor slicing stability, and the phenomenon of phase change material precipitation occurs when the temperature exceeds a certain temperature, which is unfavorable for storage and transportation. In addition, this characteristic also results in the chips not being fed and transported normally at the feed inlet of the melt spinning machine. The problems restrict the application of the phase change modified material in melt spinning fiber, and greatly restrict the development of terylene and chinlon phase change fiber. How to prepare a high-homogenization phase-change melt through a melt spinning process, so as to prepare the phase-change fiber becomes a difficult point to be solved in the field.
Disclosure of Invention
The invention aims at solving the problems existing in the prior art and discloses a preparation method of melt spinning phase-change fibers, which comprises the following steps:
s1, adding resin A into a multiple high-frequency shearing melt extrusion system to melt;
s2, mixing the resin A with the phase change modified material when the resin A is in a semi-molten state, shearing the resin A melt and the phase change modified material at a high speed in a melt pipeline of a multiple high-frequency shearing and melt extrusion system to form uniform mixed melt, pressurizing by a melt pump and metering by a metering pump, and conveying to a spinning box;
s3, conveying the resin B to a spinning box body through a single screw extruder;
s4, co-extruding the resin A and the resin B to form the phase-change fiber with the sheath-core structure, wherein the resin A forms a core layer containing the phase-change modified material, and the resin B forms a skin layer.
In a preferred scheme, the resin A is one or a mixture of more than one of polyethylene, low-melting polyester and polybutylene succinate.
In the preferred scheme, the phase change modified material is in a liquid state, the melting point of the phase change material is between 30 and 50 ℃, and the molecular weight of the phase change material is between 20000 and 100000.
In a preferred embodiment, the phase change modifying material is selected from the group consisting of phase change microcapsules, polyethylene glycol PEG-2000.
In the preferred scheme, when the phase-change fiber with the sheath-core structure is extruded, the fiber with expected fineness is formed under the action of side blowing and cooling, and the melt-spun phase-change temperature-regulating fiber with the sheath-core structure is prepared after oiling, hot drawing and winding.
In a preferred embodiment, the melt A and the phase change modifying material are sheared by kneading shear blocks and conveying flighted blocks in a multiple high frequency shearing melt extrusion system, which is a three screw extruder.
The invention also discloses a melt spinning device for the phase-change fiber, which comprises:
the multiple high-frequency shearing and melting extrusion system comprises a melt pipeline, wherein a thread block, a kneading block, a shearing conveying screw, a feed inlet and an online adding port are arranged in the melt pipeline, the feed inlet is communicated with the melt pipeline, the online adding port is communicated with the melt pipeline, and the resin at the online adding port is in a semi-molten state;
the multiple high-frequency shearing melting extrusion system also comprises a melt pump pressurizing system and a metering pump;
a single screw extruder;
and the spinning box body is connected with the multiple high-frequency shearing and melting extrusion system and the single-screw extruder.
In a preferred scheme, the multiple high-frequency shearing and melting extrusion system further comprises an online devolatilization port, wherein the online devolatilization port is communicated with the melt pipeline and is used for removing air in the melt pipeline.
The invention also discloses a phase-change fiber prepared by the method, wherein the phase-change fiber comprises a skin layer and a core layer, the skin layer wraps the core layer, and the core layer is dispersed with a phase-change modified material.
The invention realizes the online composite modification of the phase-change modified material and the resin melt by the online addition and devolatilization method, prepares the phase-change modified resin melt with high uniformity, realizes the stable melt spinning production of the phase-change temperature-regulating fiber, has good fiber mechanical properties, and solves the problems of poor slice stability, difficult feeding, uneven melt, poor mechanical properties and the like in the prior art that the melt-spun phase-change fiber is prepared by the phase-change modified slice.
The phase-change modified melt preparation process can eliminate the drying process of phase-change components, and can remove the water and small molecular volatile matters volatilized in the melt by vacuumizing through the negative pressure port, thereby reducing the energy loss in the slicing and drying link and lowering the production cost. Compared with the solution method for preparing the phase-change fiber, the melt method has the advantages of short process flow, inapplicability to organic solvents, environmental protection and the like, and can further expand the application of the phase-change material in the fields of spinning and new materials.
Drawings
Fig. 1 is a schematic structural view of the apparatus of the present embodiment;
FIG. 2 is a photomicrograph of a phase change fiber
The marks in the figure: 1. a feed inlet; 2. an online adding port; 3. an online devolatilization port; 4. shearing a conveying screw; 5. a screw block; 6. kneading blocks; 7, a melt pump pressurizing system; 8. a metering pump; 9. a spinning manifold; 10. a single screw extruder.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, this embodiment discloses a melt spinning apparatus for phase change fibers, comprising: multiple high frequency shear melt extrusion systems, single screw extruder 10, and spinning beam.
As shown in fig. 1, the multiple high-frequency shearing and melt extrusion system is a three-screw extruder and comprises a melt pipeline, wherein a thread block 5, a kneading block 6, a shearing and conveying screw 4, a feed inlet 1 and an online adding port 2 are arranged in the melt pipeline, the feed inlet is communicated with the melt pipeline, the online adding port 2 is communicated with the melt pipeline, and the resin at the online adding port is in a semi-molten state; the multiple high-frequency shearing melt extrusion system also comprises a melt pump pressurizing system 7 and a metering pump 8; the inside three screw rods that is equipped with of multiple high frequency shearing melting extrusion system, feed inlet 1 is located the tip of multiple high frequency shearing melting extrusion system, and the shape of feed inlet 1 is the shape of common feed inlet, and feed inlet 1 can add the resin material to the melt pipeline.
The online adding port 2 is used for adding liquid phase change modified materials, resin entering from the feeding port 1 is just melted into a semi-molten state below the online adding port 2, the resin can be mixed with the phase change modified materials, and the resin materials and the phase change modified materials are better mixed by shearing through the kneading blocks 6 in a melt pipeline, so that the problems of difficult feeding, poor blending effect, uneven melt and the like caused by mixing of the phase change modified materials and the solid resin materials are avoided.
The multiple high-frequency shearing melting extrusion system is also provided with a plurality of online devolatilization ports 3, the online devolatilization ports 3 are communicated with the melt pipeline, and in the online devolatilization ports 3, the moisture and small molecular volatile matters volatilized from the melt in the melt pipeline can be removed through the online devolatilization ports 3, so that the manual operation is reduced. The online devolatilization port 3 is of a channel structure, the size of the online devolatilization port is properly set according to the needs, and materials in a melt pipeline are sheared, so that on one hand, moisture and small molecules are volatilized when being mixed on the other hand.
The melt pipeline is connected with a melt pump pressurizing system 7 and a metering pump 8, the melt pump pressurizing system 7 can increase the melt, the metering pump 8 performs material metering, and the material is conveyed to the spinning box body after metering.
The single screw extruder 10 is of conventional construction, with a metering pump downstream thereof, and is capable of delivering material to a spinning beam.
And (3) spinning the phase-change fiber with the sheath-core structure in a spinning box body.
Example 1, melt spinning Process for preparing melt of on-line addition devolatilizing phase-change modified resin
The first step: 5kg of polyethylene resin chips and 5kg of polyester chips (polyethylene terephthalate) were weighed respectively, and the polyester chips were dried in a vacuum oven at a set temperature of 120℃for 4 hours of pre-crystallization, followed by heating to 180℃and drying for 24 hours.
And a second step of: as shown in fig. 1, polyethylene resin pellets were fed through a feeder into the feed port of a multiple high frequency shear melt extrusion system, and dried polyester pellets were fed into a single screw melt extrusion system. The temperature of each heating area of the multiple high-frequency shearing and melt extrusion system is as follows: second region 100 ℃, third region 110 ℃, fourth region 120 ℃, fifth region 130 ℃, sixth region 160 ℃, seventh region 160 ℃, eighth region 190 ℃, ninth region 190 ℃, tenth region 190 ℃, eleventh region 190 ℃, twelfth region 190 ℃, head 190 ℃, melt pump 210, metering pump 220 ℃, and pipeline a temperature 220 ℃. The addition temperature of each zone of the single screw is set as follows: primary zone 265 ℃, secondary zone 285 ℃, tertiary zone 285 ℃, quaternary zone 285 ℃, penta zone 285 ℃, metering pump 285 ℃, conduit B temperature 285 ℃, spinning manifold 285 ℃. The pipeline A is a pipeline connected with the multiple high-frequency shearing and melting extrusion system and the spinning box, and the pipeline B is a pipeline connected with the single-screw extruder and the spinning box.
And a third step of: and (3) online adding the phase-change microcapsule dispersion liquid into a multiple high-frequency shearing and melting extrusion system by utilizing a liquid meter, wherein the liquid adding amount is 30mL/min, wherein according to parts by weight, 100 parts of polyethylene resin slices need 40 parts of the phase-change microcapsule dispersion liquid, the shearing rotating speed of a multi-screw is set to be 210r/min, and the pressure of a negative pressure vacuumizing port is set to be 0.6Mpa.
Fourth step: the phase change modified melt and the polyester melt prepared by the process are conveyed to a melt pump and a metering pump for metering through a material path, the pressure of the melt pump after pressurization is 7.5Mpa, the volume ratio of the two components is set to be 1:1, the rotating speeds of the two metering pumps are set to be 15Hz, and the melt and the polyester melt are conveyed to a spinning box body after metering by the metering pump.
Fifth step: the pressure of the spinning component is regulated by regulating the feeding amount, the component pressures of the two components are respectively 6.9Mpa and 7.1Mpa, and the melt is extruded into fiber through the skin core component.
Sixth step: preparing 10% of polyester spinning oil, setting the size of an oil pump to be 10Hz, setting the temperature of lateral blowing to be 25 ℃, setting the wind speed to be 0.36m/s, setting the stretching multiple to be 3.5 times, and setting the temperature of a hot roller to be: GR1 at 80 ℃, GR2 at 110 ℃, GR3 at 160 ℃, and winding speed at 2000m/min.
As shown in FIG. 2, the prepared melt-spun phase-change fiber sample is tested, and the result shows that the fiber diameter is 15-20 mu m, the fiber has an obvious sheath-core structure, the breaking strength of the fiber is 1.3cN/dtex, the elongation at break is 20.6%, the phase-change temperature of the fiber is 32-48 ℃, and the latent heat value of the fiber is 22.3J/g.
Example 2: preparation method of melt spinning online addition devolatilization phase change modified resin melt and phase change fiber
The preparation process was essentially the same as in example 1, except that: replacing the polyester chip with a nylon 6 chip to prepare the nylon phase-change fiber, wherein the phase-change core layer comprises the following two components in proportion: nylon 6 skin layer was 4:6. The prepared melt-spun phase-change fiber sample is tested, the breaking strength of the fiber is 2.7cN/dtex, the breaking elongation is 30.1%, the phase-change temperature range of the fiber is 32-48 ℃, and the latent heat value of the fiber is 20.9J/g.
Example 3: preparation method of melt spinning online addition devolatilization phase change modified resin melt and phase change fiber
The preparation process was essentially the same as in example 1, except that: the polyolefin used as the phase change modified substrate is changed into low-melting Polyester (PET), the temperature of each heating area of the melt processing temperature is reduced by 10 ℃, and the prepared melt spinning phase change fiber sample is tested, wherein the breaking strength of the fiber is 3.8cN/dtex, the elongation at break is 33.2%, the phase change temperature range of the fiber is 32-49 ℃, and the latent heat value of the fiber is 21.7J/g.
Claims (9)
1. The preparation method of the melt spinning phase-change fiber is characterized by comprising the following steps:
s1, adding resin A into a multiple high-frequency shearing melt extrusion system to melt;
s2, mixing the resin A with the phase-change modified material when the resin A is in a semi-molten state, shearing the resin A melt and the phase-change modified material at a high speed in a melt pipeline of a multiple high-frequency shearing and melt extrusion system to form a uniform mixed melt, removing water and micromolecular volatile matters volatilized in the melt, pressurizing by a melt pump and metering by a metering pump, and conveying to a spinning box;
s3, conveying the resin B to a spinning box body through a single screw extruder;
s4, co-extruding the resin A and the resin B to form the phase-change fiber with the sheath-core structure, wherein the resin A forms a core layer containing the phase-change modified material, and the resin B forms a skin layer.
2. The method for preparing melt spinning phase change fibers according to claim 1, wherein the resin A is one or a mixture of several of polyethylene, low-melting polyester and polybutylene succinate.
3. The method for preparing melt-spun phase-change fibers according to claim 2, wherein the phase-change modifying material is in a liquid state, the melting point of the phase-change material is 30-50 ℃, and the molecular weight of the phase-change material is 20000-100000.
4. The method for preparing melt-spun phase change fibers of claim 3, wherein the phase change modifying material is selected from the group consisting of phase change microcapsules and polyethylene glycol PEG-2000.
5. The method for preparing melt spinning phase change fiber according to claim 4, wherein when the phase change fiber with a sheath-core structure is extruded, the fiber with expected fineness is formed under the action of side blowing and cooling, and the melt spinning phase change temperature regulating fiber with the sheath-core structure is prepared after oiling, hot drawing and winding.
6. The method of producing melt spun phase change fibers of claim 5 wherein the melt a and phase change modifying material are sheared by kneading shear blocks and conveying flighted blocks in a multiple high frequency shearing melt extrusion system, the multiple high frequency shearing melt extrusion system being a three screw extruder.
7. A melt spinning apparatus for phase change fibers, comprising:
the multiple high-frequency shearing and melting extrusion system comprises a melt pipeline, wherein a thread block (5), a kneading block (6), a shearing conveying screw (4), a feed inlet (1) and an online adding port (2) are arranged in the melt pipeline, the feed inlet is communicated with the melt pipeline, the online adding port (2) is communicated with the melt pipeline, and the resin at the online adding port is in a semi-molten state;
the multiple high-frequency shearing melting extrusion system also comprises a melt pump pressurizing system (7) and a metering pump (8);
a single screw extruder (10);
a spinning beam connected to a multiple high frequency shear melt extrusion system and a single screw extruder (10).
8. The apparatus according to claim 5, wherein the multiple high frequency shear melt extrusion system further comprises an in-line devolatilizer (3), the in-line devolatilizer (3) being in communication with the melt conduit, the in-line devolatilizer (3) being configured to remove air from the melt within the melt conduit.
9. A phase change fiber prepared by the method of any one of claims 1-6, wherein the phase change fiber comprises a sheath layer and a core layer, the sheath layer surrounds the core layer, and the core layer is dispersed with a phase change modifying material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311125023.0A CN117385484A (en) | 2023-09-03 | 2023-09-03 | Melt spinning phase-change fiber preparation method, melt spinning equipment and phase-change fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311125023.0A CN117385484A (en) | 2023-09-03 | 2023-09-03 | Melt spinning phase-change fiber preparation method, melt spinning equipment and phase-change fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117385484A true CN117385484A (en) | 2024-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311125023.0A Pending CN117385484A (en) | 2023-09-03 | 2023-09-03 | Melt spinning phase-change fiber preparation method, melt spinning equipment and phase-change fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117385484A (en) |
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- 2023-09-03 CN CN202311125023.0A patent/CN117385484A/en active Pending
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