CN114892289A - Production method of multi-hollow regenerated wool-like fiber - Google Patents
Production method of multi-hollow regenerated wool-like fiber Download PDFInfo
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- CN114892289A CN114892289A CN202210461021.8A CN202210461021A CN114892289A CN 114892289 A CN114892289 A CN 114892289A CN 202210461021 A CN202210461021 A CN 202210461021A CN 114892289 A CN114892289 A CN 114892289A
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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
- D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
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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
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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
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The invention discloses a production method of multi-hollow regenerated wool-like fibers, which comprises the following steps: putting the regenerated PET slices into a crystallization drying device for crystallization and drying; then conveying the filament bundle to a screw extruder for melt extrusion and spinning through a spinning box, and performing side-blowing cooling, bundling and oiling, pre-networking, drafting and shaping, main networking and winding forming on the filament bundle to obtain finished filaments; the spinneret plate used in spinning is provided with a plurality of spinneret orifices, each spinneret orifice comprises five groups of single orifices which are arranged in a straight line at intervals, and each group of single orifices is arranged by a pair of C-shaped grooves at intervals relatively. The invention can prepare fluffy, elastic and soft wool-like fibers and meet higher market demands.
Description
Technical Field
The invention relates to the technical field of fiber production, in particular to a method for producing multi-hollow regenerated wool-like fibers.
Background
With the improvement of living standard, the consumption demand is also improved, the conventional fiber is more and more difficult to meet the market demand, and the functional fiber can quickly adapt to the market with various fabric styles and application effects and is accepted by the public. Most of wool-like fibers on the market at present are single hollow fibers or multi-hollow fibers, the fluffing effect is not good, the soft touch feeling of the fabric is different from that of a natural wool fabric, and the higher market demand is difficult to meet. In addition, as the environmental protection concept is increasingly developed, the wool-like products of the primary fibers do not meet the current consumption concept, and thus, new fiber products with the performance closer to that of natural wool fabrics and environmental protection need to be developed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a production method of multi-hollow regenerated wool-like fibers, which can prepare fluffy, elastic and soft wool-like fibers and meet higher market demands.
In order to achieve the purpose, the invention adopts the following technical scheme:
a production method of multi-hollow regenerated wool-like fibers comprises the following steps: putting the regenerated PET slices into a crystallization drying device for crystallization and drying; then conveying the filament bundle to a screw extruder for melt extrusion and spinning through a spinning box, and performing side-blowing cooling, bundling and oiling, pre-networking, drafting and shaping, main networking and winding forming on the filament bundle to obtain finished filaments; the spinneret plate used in spinning is provided with a plurality of spinneret orifices, each spinneret orifice comprises five groups of single orifices which are arranged in a straight line at intervals, and each group of single orifices is arranged by a pair of C-shaped grooves at intervals relatively.
The viscosity of the regenerated PET slice is 0.72-0.75dl/g, the crystallization and drying temperatures are both 155-160 ℃, and the drying time is 8 h.
The temperatures of the first zone to the sixth zone of the screw extruder are 260-.
The temperature of the spinning box body is controlled to be 285-300 ℃ during spinning.
When drafting and setting, the speed of the first drafting roller is 850-1100m/min, and the temperature is 82-100 ℃; the speed of the second drawing roller is 3000-4000m/min, and the temperature is 125-145 ℃.
The winding speed during winding molding is 3200-5200 m/min.
Crystallization drying device includes the barrel, locates vertical first stirring rake in the barrel, slides and locates the horizontal second stirring rake in the barrel, still be equipped with in the barrel and drive rotatory pivot through first stirring rake, the movable sleeve is equipped with a pair of piece that pushes away in the pivot, and pushes away the axial region spiro union of a one end and first stirring rake, the cover is equipped with in the pivot can be along with pivot pivoted scroll bar spare, and scroll bar spare circumferential direction clamp is established between a pair of piece that pushes away, fixed cover is equipped with the turbine with scroll bar spare meshing on the second stirring rake.
First stirring rake includes the last A axle and lower A axle that connect through electromagnetic clutch, the pivot includes last B axle and lower B axle that connect through electromagnetic clutch, go up and be connected through a pair of gear drive between A axle and last B axle.
The lower shaft B and the vortex rod piece slide up and down and are in circumferential limit connection.
The invention has the beneficial effects that: the method takes the regenerated PET slices as raw materials, successfully prepares fluffy, elastic and soft wool-like fibers through the innovative design of the five-hollow spinneret plate structure and the optimization and improvement of process parameters, has the crease-resistant, shape-preserving and high-strength wear-resisting properties of the polyester fibers, and can meet higher market demands.
Drawings
FIG. 1 is a schematic representation of a cross-section of a spinneret orifice of the present invention;
FIG. 2 is a schematic view showing the structure of a crystal drying apparatus according to the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
fig. 4 is an enlarged view at B in fig. 2.
In the figure: spinneret orifice 1, single hole 11, barrel 2, first partition plate 21, second partition plate 22, motor 23, slide rail 24, fixing plate 25, first stirring paddle 3, upper shaft A31, lower shaft A32, second stirring paddle 4, rotating shaft 5, upper shaft B51, lower shaft B52, key 53, scroll bar member 6, key groove 61, convex ring 62, pushing member 7, sliding groove 71, turbine 8, electromagnetic clutch 9 and gear 91.
Detailed Description
The invention is further described with reference to the accompanying drawings and the detailed description below:
example 1
A production method of multi-hollow regenerated wool-like fibers comprises the following steps: putting the regenerated PET slices into a crystallization drying device for crystallization and drying treatment, wherein the viscosity of the regenerated PET slices is 0.73dl/g, the crystallization and drying temperatures are both 155 ℃ and 160 ℃, and the drying time is 8 h.
Then conveying the mixture to a screw extruder for melt extrusion and spinning through a spinning box, wherein the temperatures of first to sixth areas of the screw extruder are 260 ℃, 270 ℃, 285 ℃, 295 ℃ in sequence, and the temperature of the spinning box body during spinning is controlled to be 285 ℃. The spinneret plate used in spinning is provided with a plurality of spinneret orifices 1, each spinneret orifice 1 comprises five groups of single orifices 11 which are arranged in a straight line at intervals, and each group of single orifices 11 is arranged by a pair of C-shaped grooves at intervals relatively, as shown in figure 1.
Performing side-blowing cooling, bundling and oiling, pre-networking, drafting and shaping, main networking and winding forming on the tows to obtain finished filaments; when drafting and setting, the speed of the first drafting roller is 900m/min, and the temperature is 90 ℃; the speed of the second drawing roll was 3500m/min and the temperature was 130 ℃. The winding speed during winding molding was 4000 m/min.
Example 2
A production method of multi-hollow regenerated wool-like fibers comprises the following steps: putting the regenerated PET slices into a crystallization drying device for crystallization and drying treatment, wherein the viscosity of the regenerated PET slices is 0.72dl/g, the crystallization and drying temperatures are both 155 ℃ and 160 ℃, and the drying time is 8 h.
Then conveying the mixture to a screw extruder for melt extrusion and spinning through a spinning box, wherein the temperatures of first to sixth areas of the screw extruder are 260 ℃, 285 ℃, 295 ℃ and 300 ℃ in sequence, and the temperature of the spinning box body is controlled to be 300 ℃ during spinning. The spinneret plate used in spinning is provided with a plurality of spinneret orifices 1, each spinneret orifice 1 comprises five groups of single orifices 11 which are arranged in a straight line at intervals, and each group of single orifices 11 is arranged by a pair of C-shaped grooves at intervals relatively, as shown in figure 1.
Performing side-blowing cooling, bundling and oiling, pre-networking, drafting and shaping, main networking and winding forming on the tows to obtain finished filaments; when drafting and setting, the speed of the first drafting roller is 1100m/min, and the temperature is 82 ℃; the speed of the second draw roll was 4000m/min and the temperature was 145 ℃. The winding speed in the winding was 5200 m/min.
Example 3
A production method of multi-hollow regenerated wool-like fibers comprises the following steps: putting the regenerated PET slices into a crystallization drying device for crystallization and drying treatment, wherein the viscosity of the regenerated PET slices is 0.75dl/g, the crystallization and drying temperatures are both 155 and 160 ℃, and the drying time is 8 h.
Then conveying the mixture to a screw extruder for melt extrusion and spinning through a spinning box, wherein the temperatures of first to sixth areas of the screw extruder are 270 ℃, 275 ℃, 290 ℃, 295 ℃ and 300 ℃ in sequence, and the temperature of the spinning box body is controlled to be 300 ℃ during spinning. The spinneret plate used in spinning is provided with a plurality of spinneret orifices 1, each spinneret orifice 1 comprises five groups of single orifices 11 which are arranged in a straight line at intervals, and each group of single orifices 11 is arranged by a pair of C-shaped grooves at intervals relatively, as shown in figure 1.
Performing side-blowing cooling, bundling and oiling, pre-networking, drafting and shaping, main networking and winding forming on the tows to obtain finished filaments; when drafting and setting, the speed of the first drafting roller is 850m/min, and the temperature is 100 ℃; the speed of the second draw roll was 3000m/min and the temperature was 125 ℃. The winding speed during winding was 3800 m/min.
Example 4
A production method of multi-hollow regenerated wool-like fibers comprises the following steps: putting the regenerated PET slices into a crystallization drying device for crystallization and drying treatment, wherein the viscosity of the regenerated PET slices is 0.72dl/g, the crystallization and drying temperatures are both 155 ℃ and 160 ℃, and the drying time is 8 h.
Then conveying the mixture to a screw extruder for melt extrusion and spinning through a spinning box, wherein the temperatures of first to sixth areas of the screw extruder are 260 ℃, 270 ℃, 285 ℃, 295 ℃ in sequence, and the temperature of the spinning box body is controlled to be 300 ℃ during spinning. The spinneret plate used in spinning is provided with a plurality of spinneret orifices 1, each spinneret orifice 1 comprises five groups of single orifices 11 which are arranged in a straight line at intervals, and each group of single orifices 11 is arranged by a pair of C-shaped grooves at intervals relatively, as shown in figure 1.
Performing side-blowing cooling, bundling and oiling, pre-networking, drafting and shaping, main networking and winding forming on the tows to obtain finished filaments; when drafting and setting are carried out, the speed of the first drafting roller is 1100m/min, and the temperature is 90 ℃; the speed of the second drawing roll was 3500m/min and the temperature was 130 ℃. The winding speed during winding was 3200 m/min.
The properties of the fibers produced in the above examples are shown in the following table.
The water-containing slices are in an amorphous structure, the softening point is low, the phenomenon of ring-shaped material blocking is easily caused in the feeding section of the screw, the normal production is influenced, hydrolysis can also occur during melting, the molecular weight of the polymer is reduced, and the water is vaporized at high temperature to form bubbles, so that the broken ends or broken filaments of spinning are easily caused, and the quality of fibers is poor. But adopt current pre-crystallization drying equipment to carry out the crystal drying to the section, have high-temperature gas and the insufficient problem of section contact, drying efficiency is low, and drying time is long, and production efficiency can not effectively be promoted.
As shown in fig. 2 to 4, the crystallization drying device adopted in the embodiment of the present invention includes a cylinder 2, a longitudinal first stirring paddle 3 disposed in the cylinder 2, and a transverse second stirring paddle 4 slidably disposed in the cylinder 2, a rotating shaft 5 driven to rotate by the first stirring paddle 3 is further disposed in the cylinder 2, a pair of pushing members 7 is movably sleeved on the rotating shaft 5, one end of each pushing member 7 is screwed with a shaft portion of the first stirring paddle 3, a scroll member 6 capable of rotating along with the rotating shaft 5 is sleeved on the rotating shaft 5, the scroll member 6 is circumferentially rotatably clamped between the pair of pushing members 7, and a turbine 8 engaged with the scroll member 6 is fixedly sleeved on the second stirring paddle 4.
The lower part of the cylinder body 2 is fixedly provided with a fixed plate 25, the arrangement direction of the fixed plate 25 is vertical to the fixed plate 25, the lower end of a lower B shaft 52 of the rotating shaft 5 is rotatably arranged on the fixed plate 25, a lower A shaft 32 of the second stirring paddle 4 rotatably penetrates through the fixed plate 25, and the second stirring paddle 4 comprises a paddle which is positioned below the fixed plate 25.
The inner wall of the cylinder body 2 is provided with a pair of longitudinal slide rails 24, and two ends of the shaft of the second stirring paddle 4 are slidably connected with the pair of slide rails 24.
The upper end surface and the lower end surface of the vortex rod piece 6 are respectively provided with a convex ring 62, and the lower surface of the pushing piece 7 above and the upper surface of the pushing piece 7 below are provided with an annular sliding groove 71 which is matched with the convex ring 62 and is in sliding connection.
The first stirring paddle 3 comprises an upper A shaft 31 and a lower A shaft 32 which are connected through an electromagnetic clutch 9, the rotating shaft 5 comprises an upper B shaft 51 and a lower B shaft 52 which are connected through the electromagnetic clutch 9, and the upper A shaft 31 and the upper B shaft 51 are in transmission connection through a pair of gears 91. Namely, the gear 91 is fixedly arranged on the upper A shaft 31 and the upper B shaft 51, the two gears 91 are meshed with each other, and the upper A shaft 31 is driven to rotate by the motor 23.
A first partition plate 21 and a second partition plate 22 which are spaced up and down are arranged in the upper portion of the cylinder 2, the upper A shaft 31 and the upper B shaft 51 penetrate through the first partition plate 21 in a rotating mode, the lower A shaft 32 and the lower B shaft 52 penetrate through the second partition plate 22 in a rotating mode, and the electromagnetic clutch 9 is located between the first partition plate 21 and the second partition plate 22.
The lower B shaft 52 and the scroll member 6 are connected in a circumferential limiting manner by sliding up and down. The lower B shaft 52 is provided with a plurality of axially arranged keys 53, and the inner wall of the scroll member 6 is provided with a key groove 61 for the keys 53 to be clamped into, so that the scroll member 6 can rotate along with the lower B shaft 52 and can move up and down under the pushing of the pushing member 7. The connection mode of the worm wheel 6 and the worm wheel 8 is actually the existing worm wheel and worm rod connection.
This crystal drying device during operation, motor 23 drives first stirring rake 3 and just reverses rotation, first stirring rake 3 drives pivot 5 through a pair of gear 91 and rotates, scroll bar piece 6 rotates and drives second stirring rake 4 along with pivot 5 and rotates, meanwhile, first stirring rake 3 rotates and still makes pushing away 7 and rise or descend, pushing away 7 promotion scroll bar piece 6 and go up and down, and then drive second stirring rake 4 and go up and down, be at the stirring of first stirring rake 3 at the horizontal plane promptly, realize the stirring of 4 limits of second stirring rake on vertical face simultaneously, thereby make steam and section abundant contact, promote the crystal drying effect. Further, the electromagnetic clutch 9 connection of the upper B shaft 51 and the lower B shaft 52 may be disconnected first, the second paddle 4 may be lifted up and down to a desired height by the first paddle 3, the electromagnetic clutch 9 connection of the upper B shaft 51 and the lower B shaft 52 may be connected, the electromagnetic clutch 9 connection of the upper a shaft 31 and the lower a shaft 32 may be disconnected, the stirring may be performed solely by the second paddle 4, or the electromagnetic clutch 9 connection of the upper B shaft 51 and the lower B shaft 52 may be disconnected, the stirring may be performed solely by the first paddle 3, and thus, a desired stirring manner may be selected according to actual conditions.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A production method of multi-hollow regenerated wool-like fibers is characterized by comprising the following steps: the method comprises the following steps: putting the regenerated PET slices into a crystallization drying device for crystallization and drying; then conveying the filament bundle to a screw extruder for melt extrusion and spinning through a spinning box, and performing side-blowing cooling, bundling and oiling, pre-networking, drafting and shaping, main networking and winding forming on the filament bundle to obtain finished filaments; a plurality of spinneret orifices (1) are arranged on a spinneret plate used in spinning, each spinneret orifice (1) comprises five groups of single orifices (11) which are arranged in a straight line at intervals, and each group of single orifices (11) is arranged by a pair of C-shaped grooves at intervals relatively.
2. The method for producing a multiple hollow regenerated wool-like fiber according to claim 1, wherein: the viscosity of the regenerated PET slices is 0.72-0.75dl/g, the crystallization and drying temperatures are both 155 ℃ and 160 ℃, and the drying time is 8 h.
3. The method for producing a multiple hollow regenerated wool-like fiber according to claim 1, wherein: the temperatures of the first zone to the sixth zone of the screw extruder are 260-.
4. The method for producing a multiple hollow regenerated wool-like fiber according to claim 1, wherein: the temperature of the spinning box body is controlled to be 285-300 ℃ during spinning.
5. The method for producing a multiple hollow regenerated wool-like fiber according to claim 1, wherein: when drafting and setting, the speed of the first drafting roller is 850-1100m/min, and the temperature is 82-100 ℃; the speed of the second drawing roller is 3000-4000m/min, and the temperature is 125-145 ℃.
6. The method for producing a multiple hollow regenerated wool-like fiber according to claim 1, wherein: the winding speed during winding molding is 3200-5200 m/min.
7. The method for producing a multiple hollow regenerated wool-like fiber according to claim 1, wherein: crystallization drying device includes barrel (2), locates vertical first stirring rake (3), the horizontal second stirring rake (4) of sliding in barrel (2) are located to barrel (2), still be equipped with in barrel (2) and drive rotatory pivot (5) through first stirring rake (3), the activity cover is equipped with a pair of piece (7) that pushes away on pivot (5), and pushes away the axial region spiro union of piece (7) one end and first stirring rake (3), the cover is equipped with and can follows pivot (5) pivoted vortex member (6) on pivot (5), and vortex member (6) circumferential direction presss from both sides and establish a pair of between pushing away piece (7), fixed cover is equipped with turbine (8) with vortex member (6) meshing on second stirring rake (4).
8. The method for producing a multiple hollow regenerated wool-like fiber according to claim 7, wherein: first stirring rake (3) are including last A axle (31) and lower A axle (32) that connect through electromagnetic clutch (9), pivot (5) are including last B axle (51) and lower B axle (52) that connect through electromagnetic clutch (9), go up A axle (31) and go up between B axle (51) and be connected through a pair of gear (91) transmission.
9. The method for producing a multiple hollow regenerated wool-like fiber according to claim 8, wherein: the lower B shaft (52) and the scroll rod piece (6) slide up and down and are in circumferential limit connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210461021.8A CN114892289A (en) | 2022-04-28 | 2022-04-28 | Production method of multi-hollow regenerated wool-like fiber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210461021.8A CN114892289A (en) | 2022-04-28 | 2022-04-28 | Production method of multi-hollow regenerated wool-like fiber |
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Citations (8)
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|---|---|---|---|---|
| CN204869340U (en) * | 2015-07-28 | 2015-12-16 | 楼德荣 | Improvement drying on coloured production line of dacron POY is crystallization case in advance |
| JP2017131844A (en) * | 2016-01-28 | 2017-08-03 | 竹本油脂株式会社 | Agitator |
| CN108159936A (en) * | 2018-02-28 | 2018-06-15 | 苏州市吴中区双龙油漆涂料有限公司 | A kind of hand paint agitating device |
| CN207996585U (en) * | 2017-10-27 | 2018-10-23 | 南京卓铭化工有限公司 | A kind of agitator arm movable type chemical raw material mixing device |
| CN208161407U (en) * | 2017-12-25 | 2018-11-30 | 泉州市蜀行者贸易有限公司 | A kind of high-efficiency mixing tank adaptively defoamed |
| CN110640935A (en) * | 2019-08-23 | 2020-01-03 | 张家港锦亿化纤有限公司 | Pre-crystallization device with drying function for polyester yarn production and processing |
| CN110938904A (en) * | 2019-11-20 | 2020-03-31 | 浙江佳人新材料有限公司 | Production method of regenerated crimped yarn |
| CN212030096U (en) * | 2020-02-24 | 2020-11-27 | 湖州东尼新材有限公司 | Crystallization dryer for producing terylene chemical fiber |
-
2022
- 2022-04-28 CN CN202210461021.8A patent/CN114892289A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204869340U (en) * | 2015-07-28 | 2015-12-16 | 楼德荣 | Improvement drying on coloured production line of dacron POY is crystallization case in advance |
| JP2017131844A (en) * | 2016-01-28 | 2017-08-03 | 竹本油脂株式会社 | Agitator |
| CN207996585U (en) * | 2017-10-27 | 2018-10-23 | 南京卓铭化工有限公司 | A kind of agitator arm movable type chemical raw material mixing device |
| CN208161407U (en) * | 2017-12-25 | 2018-11-30 | 泉州市蜀行者贸易有限公司 | A kind of high-efficiency mixing tank adaptively defoamed |
| CN108159936A (en) * | 2018-02-28 | 2018-06-15 | 苏州市吴中区双龙油漆涂料有限公司 | A kind of hand paint agitating device |
| CN110640935A (en) * | 2019-08-23 | 2020-01-03 | 张家港锦亿化纤有限公司 | Pre-crystallization device with drying function for polyester yarn production and processing |
| CN110938904A (en) * | 2019-11-20 | 2020-03-31 | 浙江佳人新材料有限公司 | Production method of regenerated crimped yarn |
| CN212030096U (en) * | 2020-02-24 | 2020-11-27 | 湖州东尼新材有限公司 | Crystallization dryer for producing terylene chemical fiber |
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