CN115161787A - Preparation method of low linear density deviation special-shaped polyester POY (polyester pre-oriented yarn) filament - Google Patents
Preparation method of low linear density deviation special-shaped polyester POY (polyester pre-oriented yarn) filament Download PDFInfo
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- CN115161787A CN115161787A CN202210931806.7A CN202210931806A CN115161787A CN 115161787 A CN115161787 A CN 115161787A CN 202210931806 A CN202210931806 A CN 202210931806A CN 115161787 A CN115161787 A CN 115161787A
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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
- D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/04—Melting filament-forming substances
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
- D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys
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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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- 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 preparation method of low linear density deviation special-shaped polyester POY (polyester pre-oriented yarn) filament, which relates to the field of polyester yarn processing, wherein the temperature of each temperature control area is monitored in real time by a temperature monitor, the monitored temperature data is fed back to a temperature control module, and the temperature of each temperature control area is regulated by a temperature control resistance yarn, so that the temperature of polymer melt is kept consistent in the transmission process, the fluctuation of melt viscosity is greatly reduced, the linear density deviation is reduced, cooling air is input into a channel through a cooling air hole arranged on a circular blowing device, and the spinning yarn is cooled and then returns to a cooling air system through an exhaust pipeline at the upper end for circulation, the moving direction of air flow in the whole cooling process is ordered, strong vortex is not easy to generate at a spinneret plate, and then yarn shaking patches are avoided, so that the linear density deviation is reduced.
Description
Technical Field
The invention relates to the field of polyester yarn processing, in particular to a preparation method of a special-shaped polyester POY (polyester pre-oriented yarn) filament with low linear density deviation.
Background
The deviation of the linear density of the yarn, which is one of the important indicators for evaluating the quality of the yarn and affects the consumption of raw materials of the yarn and the yield, thickness, fastness, etc. of the fabric, is the deviation degree between the actual linear density of the yarn and the required linear density or the designed linear density. If the actual yarn is finer than the designed yarn, the woven fabric tends to be thinner and lighter, and the fastness tends to be poor.
For chemical fibers, the ring blowing air speed and the air volume are important factors influencing spinning forming, when the air speed is low, air flow is dragged by high-speed moving tows after contacting the tows, and only can contact the outer layers of the tows, so that the cooling conditions of the inner layers and the outer layers of the tows are greatly different, the linear density deviation of the protofilaments is increased, when the air speed is increased, the penetration capacity of the air flow is increased, the cooling conditions of the inner layers and the outer layers of the tows are uniform, the non-uniformity rate is reduced, but because the air flow speed is too high, the air flow blown out of the ring blowing device has residual kinetic energy to cause turbulent mixing of the centers of the tows, meanwhile, the upward air flow forms strong vortex close to a spinneret plate, the filaments are shaken irregularly, the forming conditions of the filaments are changed constantly, the fineness of the filaments is non-uniform, and the linear density deviation is increased.
Disclosure of Invention
The invention aims to provide a preparation method of special-shaped polyester POY (polyester pre-oriented yarn) filaments with low linear density deviation, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of low linear density deviation profiled polyester POY filament comprises the following steps:
s1, carrying out melt extrusion, namely, loading the dried and primarily filtered polyester chips into a hopper, controlling the polyester chips in the hopper to enter a spiral feeder through a control valve, heating the polyester chips in the spiral feeder to raise the temperature to form a molten state, and conveying the molten polyester chips into a spinning box under the action of a spiral feeding rod;
s2, filtering, wherein some gels and fine solid particles in the molten polymer melt are filtered by a filter layer arranged in the spinning box in the process of entering the spinning box;
s3, static mixing, namely uniformly mixing the polymer melt by using a static mixer in a polymer melt conveying pipeline, and changing the flowing state of the fluid in the pipe by using the static mixer fixed in the pipe so as to achieve the aims of good dispersion and full mixing of different fluids;
s4, metering and distributing the melt, wherein the passing speed of the melt is controlled by a metering pump arranged in the spinning box, so that the yield and the limiting fineness are controlled, and the linear density of fibers can be ensured;
s5, performing special-shaped spinning, namely spraying the polymer melt in a molten state into a channel through a special-shaped spinning nozzle at a certain spraying speed V1, wherein two areas are arranged in the channel and are respectively a deformation area which is 10-15cm below the special-shaped spinning nozzle and a stable area which is 40-80cm below the special-shaped spinning nozzle;
s6, stretching in a deformation zone, wherein after spinning leaves a spinneret plate and enters a channel, the temperature in the deformation zone is high, the fluidity is good, the spinning is stretched under the stretching action of a winding roller, the speed is high, the winding speed of the winding roller is V2, and the stretching multiple is the ratio of the winding speed to the melt ejection speed V1;
s7, cooling, namely conveying cooling air into the channel through a cooling air system, wherein the cooling air can quickly take away the heat of spinning to quickly cool the spinning;
in the step S1 of melt extrusion, temperature control areas are arranged in the screw feeder, a temperature monitor is arranged on the upper side of each temperature control area to monitor the temperature of each temperature control area in real time, a heating device is arranged on the lower side surface of the screw feeder, segmented temperature control resistance wires are arranged in the heating device, the temperature control resistance wires and the temperature monitors are correspondingly arranged, a temperature control module is arranged outside the device, the temperature control module is in information transmission with the temperature control resistance wires and the temperature monitors, the temperature of each temperature control area is monitored in real time through the temperature monitors, monitored temperature data are fed back to the temperature control modules, and temperature regulation is carried out on each temperature control area through the temperature control resistance wires to ensure that the temperature of polymer melt is kept consistent in the transmission process, so that the fluctuation of melt viscosity is greatly reduced, and the linear density deviation is further reduced;
the cooling air system is connected with the channel, a circular blowing device is arranged in the channel, the cooling air system is communicated with the circular blowing device, a cooling air hole is formed in the circular blowing device, cooling air is guided into the circular blowing device through the cooling air system, and fibers are cooled through the circular blowing device;
the topmost of corridor is equipped with exhaust duct, exhaust duct's the position that sets up is higher than the highest one row cooling air hole, exhaust duct and cooling air headtotail, cooling air is inputed to through the cooling air hole that sets up on the circular blowing device inside the corridor cools off the back to the spinning, and the exhaust duct through the upper end is got back to again and is circulated in the cooling air headtotail, and the moving direction of air current is orderly in the whole cooling process, is difficult to produce strong vortex in spinneret department to avoid the strand silk to rock the patch, thereby reduce the linear density deviation.
Preferably, the length of each temperature control area in the screw feeder is not more than 5cm, and the temperature of each section of the melt can be controlled more accurately by improving the density of the arranged temperature control areas, so that the fluctuation of the viscosity of the melt is reduced, and the deviation of linear density is reduced.
Preferably, the temperature fluctuation of each section of the temperature control area is controlled by the temperature control resistance wire to be not more than 0.1 ℃, and meanwhile, the temperature fluctuation of each section of the temperature control area is reduced through real-time feedback adjustment, so that the deviation of linear density is reduced.
Preferably, the temperature of the cooling air introduced into the ring blowing device by the cooling air system is not higher than 10 ℃ and the humidity is not higher than 25%, so that the filament can be rapidly cooled, and the filament is prevented from absorbing moisture.
Preferably, the included angle between the cooling air holes arranged on the circular blowing device is consistent, so that the blown cooling air is uniform.
Preferably, the special-shaped spinneret can be a C-shaped hollow spinneret, a cross spinneret, a double cross spinneret, a dumbbell-shaped spinneret, a flat spinneret, a triangular spinneret, a quincunx spinneret, a hollow spinneret and an I-shaped spinneret, and can meet the preparation requirements of most special-shaped filaments.
In conclusion, the beneficial effects of the invention are as follows:
1. the temperature of each temperature control area is monitored in real time through a temperature monitor, the monitored temperature data is fed back to a temperature control module, and the temperature of each temperature control area is regulated through a temperature control resistance wire, so that the temperature of polymer melt is kept consistent in the transmission process, the fluctuation of the viscosity of the melt is greatly reduced, and the deviation of linear density is further reduced;
2. cooling air is input into the channel through cooling air holes formed in the circular blowing device, the spinning is cooled, and then returns to the cooling air system through an air exhaust pipeline at the upper end to circulate, the moving direction of air flow in the whole cooling process is orderly, strong vortex is not easy to generate at a spinneret plate, and therefore the situation that patches are shaken by strands is avoided, and the density deviation of the strands is reduced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a front view of a preparation device adopted in the preparation method of the low linear density deviation profiled polyester POY filament yarn of the invention;
FIG. 2 is a schematic view of the heating apparatus of FIG. 1 according to the present invention.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The invention will now be described in detail with reference to fig. 1-2, wherein for ease of description the orientations described hereinafter are defined as follows: the up, down, left, right, front and rear directions described below correspond to the front, back, left, right, top and bottom directions of the view direction of fig. 1, fig. 1 is a front view of the apparatus of the present invention, and the directions shown in fig. 1 correspond to the front, back, left, right, top and bottom directions of the apparatus of the present invention.
Referring to fig. 1-2, an embodiment of the present invention is shown: a preparation method of low linear density deviation special-shaped polyester POY (polyester pre-oriented yarn) filaments comprises the following steps:
s1, carrying out melt extrusion, namely, loading the dried and primarily filtered polyester chips into a hopper, controlling the polyester chips in the hopper to enter a spiral feeder through a control valve, heating the polyester chips in the spiral feeder to raise the temperature to form a molten state, and conveying the molten polyester chips into a spinning box under the action of a spiral feeding rod;
s2, filtering, wherein some gels and fine solid particles in the molten polymer melt are filtered by a filter layer arranged in the spinning box in the process of entering the spinning box;
s3, static mixing, namely uniformly mixing the polymer melt by using a static mixer in a polymer melt conveying pipeline, and changing the flowing state of the fluid in the pipe by using the static mixer fixed in the pipe so as to achieve the aims of good dispersion and full mixing of different fluids;
s4, metering and distributing the melt, wherein the passing speed of the melt is controlled by a metering pump arranged in the spinning box, so that the yield and the limiting fineness are controlled, and the linear density of fibers can be ensured;
s5, performing special-shaped spinning, namely spraying the polymer melt in a molten state into a channel through a special-shaped spinning nozzle at a certain spraying speed V1, wherein two areas are arranged in the channel and are respectively a deformation area which is 10-15cm below the special-shaped spinning nozzle and a stable area which is 40-80cm below the special-shaped spinning nozzle;
s6, stretching in a deformation zone, wherein after spinning leaves a spinneret plate and enters a channel, the temperature in the deformation zone is high, the fluidity is good, the spinning is stretched under the stretching action of a winding roller, the speed is high, the winding speed of the winding roller is V2, and the stretching multiple is the ratio of the winding speed to the melt ejection speed V1;
s7, cooling, namely conveying cooling air into the channel through a cooling air system, wherein the cooling air can quickly take away the heat of spinning to quickly cool the spinning;
in the step S1 of melt extrusion, temperature control areas are arranged in the screw feeder, a temperature monitor is arranged on the upper side of each temperature control area to monitor the temperature of each temperature control area in real time, a heating device is arranged on the lower side surface of the screw feeder, segmented temperature control resistance wires are arranged in the heating device, the temperature control resistance wires and the temperature monitors are correspondingly arranged, a temperature control module is arranged outside the device, the temperature control module is in information transmission with the temperature control resistance wires and the temperature monitors, the temperature of each temperature control area is monitored in real time through the temperature monitors, monitored temperature data are fed back to the temperature control modules, and temperature regulation is carried out on each temperature control area through the temperature control resistance wires to ensure that the temperature of polymer melt is kept consistent in the transmission process, so that the fluctuation of melt viscosity is greatly reduced, and the linear density deviation is further reduced;
the cooling air system is connected with the channel, a circular blowing device is arranged in the channel, the cooling air system is communicated with the circular blowing device, a cooling air hole is formed in the circular blowing device, cooling air is guided into the circular blowing device through the cooling air system, and fibers are cooled through the circular blowing device;
the annular blowing air speed and the air volume are important factors influencing spinning forming, when the air speed is low, air flow is dragged by high-speed moving tows after contacting the tows, and only can contact the outer layers of the tows, so that the difference of the cooling conditions of the inner layers and the outer layers of the tows is large, the linear density deviation of the precursor is increased, when the air speed is increased, the penetration capacity of the air flow is enhanced, the cooling conditions of the inner layers and the outer layers of the tows are uniform, the non-uniformity rate is reduced, but because the air flow speed is too high, the air flow blown out of the annular blowing device has residual kinetic energy to cause turbulent mixing of the centers of the tows, and meanwhile, the upward air flow forms strong vortex close to a spinneret plate to cause indefinite shaking, so that the forming condition of filament is changed constantly, the titer of the monofilament is non-uniform, and the linear density deviation is increased;
the topmost of corridor is equipped with exhaust duct, exhaust duct's the position that sets up is higher than the highest one row cooling air hole, exhaust duct and cooling air headtotail, cooling air is inputed to through the cooling air hole that sets up on the circular blowing device inside the corridor cools off the back to the spinning, and the exhaust duct through the upper end is got back to again and is circulated in the cooling air headtotail, and the moving direction of air current is orderly in the whole cooling process, is difficult to produce strong vortex in spinneret department to avoid the strand silk to rock the patch, thereby reduce the linear density deviation.
In addition, in one embodiment, the length of each temperature control area in each section of the screw feeder is not more than 5cm, and the temperature of each section of the melt can be more accurately controlled by increasing the density of the arranged temperature control areas, so that the fluctuation of the viscosity of the melt is reduced, and the deviation of linear density is further reduced.
In addition, in one embodiment, the temperature fluctuation of each section of the temperature control area is controlled by the temperature control resistance wire to be not more than 0.1 ℃, and meanwhile, the temperature fluctuation of each section of the temperature control area is reduced through real-time feedback adjustment so as to reduce the deviation of linear density.
In addition, in one embodiment, the temperature of the cooling air introduced into the circular blowing device by the cooling air system is not higher than 10 ℃, the humidity is not higher than 25%, and the filament strips can be rapidly cooled while avoiding the moisture absorption of the filament strips.
In addition, in one embodiment, the included angles between the cooling air holes arranged on the circular blowing device are consistent, so that the blown cooling air is uniform.
In addition, in one embodiment, the profile spinneret can be a C-shaped hollow spinneret, a cross spinneret, a double cross spinneret, a dumbbell spinneret, a flat spinneret, a triangular spinneret, a quincunx spinneret, a hollow spinneret and an I-shaped spinneret, and can meet the preparation requirements of most profile filaments.
In the specific embodiment, the polyester chip after primary filtration is firstly put into a hopper in the preparation process, the polyester chip in the hopper is controlled by a control valve to enter a spiral feeder, the polyester chip in the spiral feeder is heated to rise to form a molten state, the polyester chip is conveyed into a spinning box under the action of a spiral feeding rod, some gels and fine solid particles in a polymer melt in the molten state are filtered by a filter layer arranged in the spinning box in the process of entering the spinning box, a static mixer in a polymer melt conveying pipeline uniformly mixes the polymer melt, the flowing state of a fluid in a pipe is changed by using the static mixer fixed in the pipe so as to achieve the purposes of good dispersion and full mixing of different fluids, the passing speed of the melt is controlled by a metering pump arranged in the spinning box, and thus the yield and the limiting fineness are controlled, simultaneously, the linear density of the fiber can be ensured, then the polymer melt in a molten state is sprayed into a channel at a certain spraying speed through a profiled spinning nozzle, two areas are arranged in the channel, namely a deformation area and a stable area, wherein the deformation area is 10-15cm below the profiled spinning nozzle, the stable area is 40-80cm below the profiled spinning nozzle, after the spinning leaves the spinning nozzle and enters the channel, the temperature in the deformation area is higher, the fluidity is better, the spinning is elongated under the drawing action of a winding roller, the speed is higher, the cooling air in the channel can rapidly take away the heat of the spinning to rapidly cool the spinning, meanwhile, a temperature monitor monitors the temperature of each temperature control area in real time, and feeds back the monitored temperature data to a temperature control module, temperature regulation is carried out on each temperature control area through a temperature control resistance wire, and the temperature of the polymer melt in the transmission process is kept consistent, thereby reduce the fluctuation of fuse-element viscosity greatly, and then reduce the linear density deviation, be equipped with the exhaust duct in the top of corridor, the exhaust duct set up the position and be higher than the cooling wind hole of the highest one row, the exhaust duct is connected with the cooling wind system, cooling wind inputs to inside the corridor through the cooling wind hole that sets up on the circular blowing device, cool off the back to the spinning, get back to the cooling wind system again through the exhaust duct of upper end and circulate, the direction of motion of air current is orderly among the whole cooling process, be difficult to produce strong vortex at spinneret department, thereby avoid rocking strand silk, thereby reduce the linear density deviation, the contained angle between the cooling wind hole that the circular blowing device was last to set up is unanimous, can make the cooling wind that blows off comparatively even.
The above description is only an embodiment of the invention, but the scope of the invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the invention. Therefore, the protection scope of the invention should be subject to the protection scope defined by the claims.
Claims (6)
1. A preparation method of low linear density deviation special-shaped polyester POY (polyester pre-oriented yarn) filaments is characterized by comprising the following steps:
s1, carrying out melt extrusion, namely, loading the dried and primarily filtered polyester chips into a hopper, controlling the polyester chips in the hopper to enter a spiral feeder through a control valve, heating the polyester chips in the spiral feeder to raise the temperature to form a molten state, and conveying the molten polyester chips into a spinning box under the action of a spiral feeding rod;
s2, filtering, wherein some gels and fine solid particles in the molten polymer melt are filtered by a filter layer arranged in the spinning box in the process of entering the spinning box;
s3, static mixing, namely uniformly mixing the polymer melt by using a static mixer in the polymer melt conveying pipeline, and changing the flow state of the fluid in the pipe by using the static mixer fixed in the pipe;
s4, metering and distributing the melt, wherein the passing rate of the melt is controlled by a metering pump arranged in the spinning box;
s5, performing special-shaped spinning, namely spraying the polymer melt in a molten state into a channel through a special-shaped spinning nozzle at a certain spraying speed V1, wherein two areas are arranged in the channel and are respectively a deformation area which is 10-15cm below the special-shaped spinning nozzle and a stable area which is 40-80cm below the special-shaped spinning nozzle;
s6, stretching in a deformation zone, wherein after spinning leaves a spinneret plate and enters a channel, the temperature in the deformation zone is high, the fluidity is good, the spinning is stretched under the stretching action of a winding roller, the speed is high, the winding speed of the winding roller is V2, and the stretching multiple is the ratio of the winding speed to the melt ejection speed V1;
s7, cooling, namely conveying cooling air into the channel through a cooling air system, wherein the cooling air can quickly take away the heat of spinning to quickly cool the spinning;
in the step S1, in the step of melt extrusion, temperature control areas are arranged in the screw feeder, a temperature monitor is arranged on the upper side of each temperature control area for monitoring the temperature of each temperature control area in real time, a heating device is arranged on the lower side surface of the screw feeder, segmented temperature control resistance wires are arranged in the heating device, the temperature control resistance wires are arranged corresponding to the temperature monitors, a temperature control module is arranged outside the device, and the temperature control module transmits information with the temperature control resistance wires and the temperature monitors;
the cooling air system is connected with the channel, a circular blowing device is arranged in the channel, the cooling air system is communicated with the circular blowing device, and a cooling air hole is formed in the circular blowing device;
the topmost of corridor is equipped with exhaust duct, exhaust duct sets up the position and is higher than the highest one row of cooling air hole, exhaust duct and cooling air system connection.
2. The method for preparing the profiled polyester POY filament with low linear density deviation as claimed in claim 1, wherein the method comprises the following steps: the length of each temperature control area in the screw feeder is not more than 5cm.
3. The method for preparing the profiled polyester POY filament with low linear density deviation as claimed in claim 1, wherein the method comprises the following steps: the temperature fluctuation of each section of the temperature control area is controlled by the temperature control resistance wire to be not more than 0.1 ℃.
4. The method for preparing the profiled polyester POY filament with low linear density deviation as claimed in claim 1, wherein the method comprises the following steps: the temperature of the cooling air introduced into the circular blowing device by the cooling air system is not higher than 10 ℃, and the humidity is not higher than 25%.
5. The method for preparing the profiled polyester POY filament with low linear density deviation as claimed in claim 1, wherein the method comprises the following steps: and included angles between cooling air holes arranged on the circular blowing device are consistent.
6. The method for preparing the profiled polyester POY filament with low linear density deviation as claimed in claim 1, wherein the method comprises the following steps: the special-shaped spinneret can be a C-shaped hollow spinneret, a cross spinneret, a double cross spinneret, a dumbbell-shaped spinneret, a flat spinneret, a triangular spinneret, a quincunx spinneret, a hollow spinneret and an I-shaped spinneret.
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|---|---|---|---|
| CN202210931806.7A CN115161787A (en) | 2022-08-04 | 2022-08-04 | Preparation method of low linear density deviation special-shaped polyester POY (polyester pre-oriented yarn) filament |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210931806.7A CN115161787A (en) | 2022-08-04 | 2022-08-04 | Preparation method of low linear density deviation special-shaped polyester POY (polyester pre-oriented yarn) filament |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117187969A (en) * | 2023-11-08 | 2023-12-08 | 中润科技股份有限公司 | Breakage-proof forming process for polyester fiber spinning |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117187969A (en) * | 2023-11-08 | 2023-12-08 | 中润科技股份有限公司 | Breakage-proof forming process for polyester fiber spinning |
| CN117187969B (en) * | 2023-11-08 | 2024-01-30 | 中润科技股份有限公司 | Breakage-proof forming process for polyester fiber spinning |
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