A preparation device and preparation method of ultra-fine denier porous high-elastic polyester filament

Abstract

The present invention belongs to the field of polyester chemical fiber production and relates to an apparatus and method for producing ultrafine denier porous, highly elastic polyester filament. The apparatus comprises a first deformation heat box comprising two semicircular shapes mounted one above the other, with heating tubes arranged in a serpentine pattern within the first deformation heat box. The nozzle of the interwoven device is truncated into a cone-shaped orifice. The interwoven device comprises two airflow channels at an angle of 25° to 35° relative to each other. After the filament exits the channels, the airflow passing through the two channels converges onto the filament to form a sheet-like interwoven point. The guide bracket of the oil tanker guide is constructed as a cylindrical structure. The bottom of the grooved guide is provided with a guide bearing. The guide bearing seat is disposed at the bottom of the guide bearing. The guide bearing seat is positioned in the second circular hole through a third circular hole. The grooved guide is fixed to the guide bracket, and the guide bearing rotates synchronously with the main bearing. Through the improvements to the equipment, this solution can produce ultrafine denier porous polyester filament with high elasticity.

Description

Technical Field

[0001] The invention belongs to the field of polyester chemical fiber production, and particularly relates to a preparation device and a preparation method for ultra-fine denier porous high-elastic polyester filaments. Background Art

[0002] With the rapid development of my country's economy and the continuous improvement of people's living standards, higher demands are being placed on the comfort of clothing fabrics. Polyester, as the most common synthetic fiber, is widely used in the textile industry. However, due to the inherent properties of polyester fiber macromolecules, fabrics made from polyester fiber suffer from poor elasticity, poor moisture absorption and breathability, susceptibility to pilling, stiffness, and a waxy feel. To overcome these shortcomings of polyester fiber, a viable solution is to develop differentiated polyester filaments. Ultrafine denier porous high-elastic polyester filament is a differentiated polyester filament with high added value. It has a low single-filament linear density (in my country, fibers with a single-filament linear density less than 0.5 dtex are generally referred to as ultrafine denier fibers), a low overall density, high elasticity, and a porous structure that imparts moisture absorption and breathability. As a result, fabrics woven from it have a soft and fluffy feel, excellent elasticity, good moisture absorption and breathability, and offer excellent wearability.

[0003] Due to the low density of the individual filaments, the production of fine-denier, porous, and highly elastic polyester filaments is also very challenging. During processing, due to the low linear density, low strength, and large specific surface area of ​​the individual filaments, the high-speed movement of the filaments on the spinning wheel is subject to air resistance and increased friction from components such as the yarn guide, which can easily lead to broken and tangled filaments and damage to the filaments. Furthermore, the large number of strands required for plying and the need for uniform cooling during cooling also add to the complexity of processing. Under current production conditions, the correct selection of process parameters and equipment improvements are crucial for the production of fine-denier, porous, and highly elastic polyester filaments.

[0004] Several existing patents address the production of fine-denier, porous, and highly elastic polyester yarns. Patent CN101649517 discloses a method for preparing fine-denier, porous, and highly elastic false-twist textured polyester yarns. The method employs the addition of a copolymer component, PTT (poly(trimethylene terephthalate)), or high-viscosity polyester, to enhance the fiber's curl, improving the fabric's breathability and elasticity. Generally speaking, altering the polyester component significantly impacts polyester filament production, making implementation challenging.

[0005] In the development of elastic yarns, if polyester is used to produce elastic yarns, generally only low-elasticity elastic yarns can be produced. In existing actual production, the crimp shrinkage of conventional fine-denier porous polyester false-twist textured yarns is generally less than 10%, with poor crimp stability and relatively low elasticity. However, the crimp shrinkage of high-elastic yarns is usually required to be greater than or equal to 25%. For single-component conventional polyester yarns, the DTY process is a conventional method to achieve high elasticity and crimp stability of polyester filaments, but the process technology still needs to be improved. For ultra-fine denier porous high-elastic polyester yarns, not only do the filaments need to have high elasticity, but their single-filament linear density is also required to be less than 0.5dtex, with excellent wearability, but the processing is more difficult.

[0006] Given the current level of processing technology, ultrafine denier polyester yarn is difficult to process, conventional polyester false twist textured yarn has relatively low elasticity and poor elastic stability. It is of great significance to improve the existing process parameters and production equipment and study a method for preparing ultrafine denier porous high-elastic polyester filament with stable performance indicators. Summary of the Invention

[0007] In order to solve the above technical problems, the present application discloses a preparation device and a preparation method for ultrafine denier porous high-elastic polyester filament to solve the problems in the prior art that the preparation of ultrafine denier porous high-elastic polyester filament is difficult and the performance of ultrafine denier porous high-elastic polyester filament is poor.

[0008] According to one aspect of the present application, a preparation device for ultra-fine denier porous high-elastic polyester filament is disclosed. The device includes a pre-netting device, a first feeding roller, a first deformation hot box, a cooling device, a false twister, a second feeding roller, a middle netting device, a second setting hot box, a setting superfeeding roller, a yarn detector, an upper oiling wheel, an oiling wheel yarn guide, and a winding device, which are arranged according to the polyester preparation process. The device is characterized in that:

[0009] The first deformation heat box includes two upper and lower semicircles installed in an open and closed manner, and heating tubes are distributed in a serpentine pattern inside the first deformation heat box;

[0010] The shape of the nozzle of the network nozzle of the middle network device is constructed as a truncated cone, and the bottom of the middle network device is provided with a cylindrical wire guide; the middle network device includes two air flow channels with an angle of 25° to 35° between each other, and before the wire strip enters the wire-traveling channel adjacent to the middle network device, the movement direction of the wire strip is at an angle of 100° to 110° with the direction of the wire-traveling channel. When the wire strip just comes out of the wire-traveling channel, the movement direction of the wire strip is at an angle of 100° to 110° with the direction of the wire-traveling channel and passes through the cylindrical wire guide. After the wire strip comes out of the wire-traveling channel, the airflow flowing through the two air flow channels converges on the wire strip, so that the wire strip forms a sheet-like network point.

[0011] The oil tanker wire guide comprises a main shaft, a groove wire guide and a wire guide bracket, the groove wire guide and the wire guide bracket are both sleeved and installed on the main shaft, the groove wire guide is fixedly installed on the wire guide bracket, the wire guide bracket is constructed as a cylindrical structure, a first circular hole, a second circular hole and a third circular hole are opened on the wire guide bracket, the first circular hole and the second circular hole both pass through the height direction of the wire guide bracket, the axis of the first circular hole coincides with the axis of the cylindrical wire guide bracket, and the second circular hole is circumferentially around the first circular hole. The third circular holes are distributed at intervals, and are arranged along the circumference of the wire guide bracket, and each of the third circular holes is connected to one of the second circular holes; a wire guide bearing is provided at the bottom of the groove wire guide, and a wire guide bearing seat is provided at the bottom of the wire guide bearing, and the wire guide bearing seat is placed in the second circular hole through the third circular hole, and the groove wire guide is fixed on the wire guide bracket after passing through one end of the second circular hole, the wire guide bearing seat, and the other end of the second circular hole in sequence through the groove wire guide shaft, and the wire guide bearing rotates synchronously with the main bearing.

[0012] In some embodiments, the oil tanker wire guide also includes a main bearing, an anti-slip wire ring, a spacer, an oil rack, a gasket and a nut. The wire guide bracket is fixed to the outer ring of the main bearing through the first circular hole, one end of the main shaft is fixed to the inner ring of the main bearing, and the other end of the main shaft passes through the anti-slip wire ring, the spacer, the oil rack, the gasket and the nut in sequence, and is fixed to the oil rack through the nut.

[0013] In some embodiments, the diameter of the small opening of the network nozzle is 0.7 mm ± 0.05 mm, and the diameter of the large opening of the network nozzle is 0.9 mm ± 0.05 mm.

[0014] In some embodiments, the cooling device is constructed as a truncated cone-shaped hollow water cooling device, including a hollow inner truncated cone and a hollow outer truncated cone arranged inside and outside, and a pipeline arrangement space with upper and lower sealing plates is formed between the hollow inner truncated cone and the hollow outer truncated cone. A plurality of interconnected cold pipes are evenly distributed in the pipeline arrangement space, and the plurality of cold pipes are arranged in contact with the hollow inner truncated cone. An upper opening is provided on the upper sealing plate of the pipeline arrangement space, and a lower opening is provided on the lower sealing plate of the pipeline arrangement space. The upper opening and the lower opening are respectively connected to the two ends of the cold pipe.

[0015] In some embodiments, the diameter of the small opening of the inner frustum is 3cm-5cm, the diameter of the large opening of the inner frustum is 4cm-6cm, the diameter of the small opening of the outer frustum is 5cm-7cm, and the diameter of the large opening of the outer frustum is 6cm-8cm.

[0016] In some embodiments, the false twister includes a ceramic disc, a polyurethane disc and a knife-edge disc, the ceramic disc includes 1, the polyurethane disc includes 6, and the knife-edge disc includes 1. Based on the false twist effect, the false twister forms a 1-6-1 combination of the ceramic disc, the polyurethane disc and the knife-edge disc. The hardness of the polyurethane disc is 78A / D-80A / D, and the thickness is 6mm-6.8mm.

[0017] According to another aspect of the present application, a method for preparing ultrafine denier porous high-elastic polyester filament is also disclosed. The method is implemented based on the ultrafine denier porous high-elastic polyester filament preparation device as described in any of the above items, and the method comprises:

[0018] Select the target polyester of the target raw material;

[0019] The target polyester is provided to the preparation equipment of the ultra-fine denier porous high-elastic polyester filament, so that the target polyester is prepared into the ultra-fine denier porous high-elastic polyester filament according to the following process flow:

[0020] Target polyester → pre-intertwining device → first feeding roller → first texturing hot box → cooling device → false twister → second feeding roller → middle intertwining device → second setting hot box → setting overfeed roller → yarn detector → upper oil wheel → oil wheel yarn guide → winding device → ultra-fine denier porous high-elastic polyester filament.

[0021] In some embodiments, the target polyester is polyester POY, and the specification of the polyester POY is 25dtex / 48f, the elongation at break is 113%, the breaking strength is 2.8cN / dtex, and the thermal stress is 20cN.

[0022] In some embodiments, the air pressure of the pre-net is 0.03-0.05 MPa, the air pressure of the mid-net is 0.1-0.18 MPa, and the oil loading rate of the oil tanker is 3.3-3.8%.

[0023] In some embodiments, the temperature of the first deformation hot box is 170~180℃; the temperature of the second setting hot box is 30~50℃; the cooling temperature is 20~25℃; the ratio of the speed of the second feeding roller to the speed of the first feeding roller is 1.5~1.6; the speed ratio of the false twister is 1.7~1.9; the processing speed of the second feeding roller is 500~600 m / min; the overfeed rate of the setting overfeed roller is -2~-3.0%.

[0024] This solution includes but is not limited to the following beneficial effects: (1) A method for preparing ultra-fine denier porous high-elastic polyester filament of the present invention, by changing the disc combination and adopting a 1-6-1 combination method, increases the grip of the disc on the filament, improves the false twist effect, reduces friction damage to the filament, reduces hair, and maintains the strength of the filament from being damaged; (2) A method for preparing ultra-fine denier porous high-elastic polyester filament of the present invention, adopts a double-channel network nozzle with a truncated cone-shaped hole shape, ensures that the ultra-fine denier porous high-elastic network is clear and easy to spread, and the filament is not easily damaged; (3) A method for preparing ultra-fine denier porous high-elastic polyester filament of the present invention The method adopts a double-rotating oil wheel yarn guide to reduce the broken ends and hairy yarns caused by the large running resistance of the yarn; (4) A method for preparing ultra-fine denier porous high-elastic polyester filament of the present invention adopts a double semi-circular closed hot box with a serpentine distribution heating tube on the inner wall; the yarn is not in contact with the hot box, so that the yarn is heated more evenly and the dyeing uniformity is improved; (5) A method for preparing ultra-fine denier porous high-elastic polyester filament of the present invention adopts a truncated cone-shaped hollow water cooling device; the yarn is not in contact with the cooling device, and cold water passes through the hollow cooling tube, and the yarn is cooled by changing the temperature of the hollow cooling tube, so that the cooling effect is obvious and the stretching effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments or the prior art.

[0026] Figure 1 Schematic diagram of the structure of the equipment for preparing ultra-fine denier porous high-elastic polyester filament of the present invention;

[0027] Figure 2 A schematic diagram of an angle of a tanker yarn guide of the equipment for preparing ultra-fine denier porous high-elastic polyester filament of the present invention;

[0028] Figure 3 A schematic diagram of another angle of the oil tanker yarn guide of the equipment for preparing ultra-fine denier porous high-elastic polyester filament of the present invention;

[0029] Figure 4 This is a schematic diagram of another angle of the oil tanker yarn guide of the equipment for preparing ultra-fine denier porous high-elastic polyester filament of the present invention;

[0030] Figure 5 This is a schematic diagram of another angle of the oil tanker yarn guide of the equipment for preparing ultra-fine denier porous high-elastic polyester filament of the present invention;

[0031] Figure 6 A schematic diagram of an angle of a network nozzle of an apparatus for preparing ultra-fine denier porous high-elastic polyester filaments of the present invention;

[0032] Figure 7This is a schematic diagram of another angle of the network nozzle of the equipment for preparing ultra-fine denier porous high-elastic polyester filaments of the present invention;

[0033] Figure 8 A schematic diagram of a false twister assembly of an apparatus for preparing ultra-fine denier porous high-elastic polyester filament of the present invention;

[0034] Figure 9 A schematic diagram of a heat box of an apparatus for preparing ultra-fine denier porous high-elastic polyester filaments according to the present invention from one angle;

[0035] Figure 10 A schematic diagram of a heat box of the equipment for preparing ultra-fine denier porous high-elastic polyester filaments according to the present invention from another angle;

[0036] Figure 11 A schematic diagram of a cooling device of an apparatus for preparing ultra-fine denier porous high-elastic polyester filaments according to the present invention from one angle;

[0037] Figure 12 This is a schematic diagram of a cooling device of the equipment for preparing ultra-fine denier porous high-elastic polyester filaments according to the present invention from another angle;

[0038] Figure 13 This is a schematic diagram of the silk strip passing through the network device;

[0039] In the figure, 1-polyester POY, 2-pre-network device, 3-first feeding roller, 4-first deformation hot box, 41-heating tube, 5-cooling device, 51-hollow inner cone, 52-hollow outer cone, 53-cold tube, 54-upper opening, 55-lower opening, 6-false twister, 7-second feeding roller, 8-middle network device, 9-second setting hot box, 10-setting overfeed roller, 11-spindle Device, 12-upper oil wheel, 13-oil wheel wire guide, 14-winding device, 15-gasket, 16-main shaft, 17-anti-slip wire ring, 18-groove wire guide, 181-groove wire guide shaft, 19-wire guide bracket, 191-first circular hole, 192-second circular hole, 193-third circular hole, 20-spacer, 21-nut, 22-ceramic disc, 23-polyurethane disc, 24-knife-edge disc. DETAILED DESCRIPTION

[0040] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] According to one aspect of the present application, a device for preparing ultra-fine denier porous high-elastic polyester filament is disclosed. The device includes: Figure 1The shown device is a pre-network device 2, a first silk feeding roller 3, a first deformation hot box 4, a cooling device 5, a false twister 6, a second silk feeding roller 7, a middle network device 8, a second shaping hot box 9, a shaping superfeed roller 10, a silk detector 11, an upper oil wheel 12, an oil wheel yarn guide 13 and a winding device 14, which are arranged correspondingly based on the polyester preparation process.

[0042] The first deformation heat box 4 includes two semicircles installed up and down, and the heating tubes 41 are distributed in a serpentine shape inside the first deformation heat box 4;

[0043] The nozzle shape of the network nozzle of the middle network device 8 is constructed in a truncated cone shape, and the bottom of the middle network device is provided with a cylindrical wire guide; the middle network device includes two air flow channels with an angle of 25° to 35° between each other. Before the silk thread enters the wire running channel adjacent to the middle network device, the movement direction of the silk thread is at an angle of 100° to 110° with the direction of the wire running channel. When the silk thread just exits the wire running channel, the movement direction of the silk thread is at an angle of 100° to 110° with the direction of the wire running channel and passes through the cylindrical wire guide. After the silk thread exits the wire running channel, the airflow flowing through the two air flow channels converges on the silk thread, so that the silk thread forms a sheet-like network point;

[0044] The tanker wire guide 13 includes a main shaft 16, a groove wire guide 18 and a wire guide bracket 19. The groove wire guide 18 and the wire guide bracket 19 are both sleeved and installed on the main shaft 16. The wire guide bracket 19 is constructed as a cylindrical structure. A first circular hole 191, a second circular hole 192 and a third circular hole 193 are opened on the wire guide bracket 19. The first circular hole 191 and the second circular hole 192 both pass through the height direction of the wire guide bracket 19. The axis of the first circular hole 191 coincides with the axis of the cylindrical wire guide bracket 19. The second circular hole 192 is circumferentially spaced around the first circular hole 191. The third circular holes 193 are arranged along the circumference of the wire guide bracket 19, and each third circular hole 193 is connected to a second circular hole 192; a wire guide bearing is provided at the bottom of the groove wire guide 18, and a wire guide bearing seat is provided at the bottom of the wire guide bearing, and the wire guide bearing seat is placed in the second circular hole 192 through the third circular hole 193, and the groove wire guide 18 passes through one end of the second circular hole 192, the wire guide bearing seat, and the other end of the second circular hole 192 in sequence through the groove wire guide shaft 181 and is fixed on the wire guide bracket 19, and the wire guide bearing rotates synchronously with the main bearing.

[0045] In some embodiments, the oil tanker wire guide 13 also includes a main bearing, an anti-slip wire ring 17, a spacer 20, an oil rack, a gasket and a nut 21. The wire guide bracket 19 is fixed to the outer ring of the main bearing through the first circular hole 191. One end of the main shaft 16 is fixed to the inner ring of the main bearing, and the other end of the main shaft 16 passes through the anti-slip wire ring 17, the spacer, the oil rack, the gasket and the nut 21 in sequence, and is fixed to the oil rack through the nut 21.

[0046] In some embodiments, the diameter of the small opening of the network nozzle is 0.7 mm ± 0.05 mm, and the diameter of the large opening of the network nozzle is 0.9 mm ± 0.05 mm.

[0047] In some embodiments, the cooling device 5 is constructed as a truncated cone-shaped hollow water cooling device, including a hollow inner truncated cone 51 and a hollow outer truncated cone 52 arranged inside and outside. A pipeline arrangement space with upper and lower sealing plates is formed between the hollow inner truncated cone 51 and the hollow outer truncated cone 52. A plurality of interconnected cold pipes 53 are evenly distributed in the pipeline arrangement space. The plurality of cold pipes 53 are arranged in contact with the hollow inner truncated cone 51. An upper opening 54 is provided on the upper sealing plate of the pipeline arrangement space, and a lower opening 55 is provided on the lower sealing plate of the pipeline arrangement space. The upper opening 54 and the lower opening 55 are respectively connected to the two ends of the cold pipe 53.

[0048] In some embodiments, the small opening diameter of the hollow inner frustum body 51 is 4 cm, the large opening diameter of the hollow inner frustum body 51 is 5 cm, the small opening diameter of the hollow outer frustum body 52 is 6 cm, and the large opening diameter of the hollow outer frustum body 52 is 7 cm.

[0049] In some embodiments, the false twister 6 includes a ceramic disc 22, a polyurethane disc 23 and a knife-edge disc 24. The ceramic disc 22 includes 1, the polyurethane disc 23 includes 6, and the knife-edge disc 24 includes 1. Based on the false twist effect, the false twister 6 is formed into a 1-6-1 combination of the ceramic disc 22, the polyurethane disc 23 and the knife-edge disc 24. The hardness of the polyurethane disc 23 is 78A / D--80A / D, and the thickness is 6mm-6.8mm.

[0050] According to another aspect of the present application, a method for preparing ultrafine denier porous high-elastic polyester filament is also disclosed. The method is implemented based on the preparation device of any of the above ultrafine denier porous high-elastic polyester filaments, and the method comprises:

[0051] Select the target polyester of the target raw material;

[0052] The target polyester is provided to the preparation equipment of ultra-fine denier porous high-elastic polyester filament, so that the target polyester is prepared into ultra-fine denier porous high-elastic polyester filament according to the following process flow:

[0053] Target polyester → pre-netting device 2 → first feeding roller 3 → first texturing hot box 4 → cooling device 5 → false twister 6 → second feeding roller 7 → intermediate netting device 8 → second setting hot box 9 → setting superfeeding roller 10 → yarn detector 11 → upper oil wheel 12 → oil wheel yarn guide 13 → winding device 14 → ultra-fine denier porous high-elastic polyester filament.

[0054] In some embodiments, the target polyester is polyester POY1, and the specification of polyester POY1 is 25dtex / 48f, the elongation at break is 113%, the breaking strength is 2.8cN / dtex, and the thermal stress is 20cN.

[0055] In some embodiments, the air pressure of the pre-network device 2 is 0.03-0.05 MPa, the air pressure of the intermediate network device 8 is 0.1-0.18 MPa, and the oil loading rate of the oil tanker is 3.3-3.8%.

[0056] In some embodiments, the temperature of the first deformation hot box 4 is 170~180℃; the temperature of the second setting hot box 9 is 30~50℃; the cooling temperature is 20~25℃; the ratio of the speed of the second feeding roller 7 to the speed of the first feeding roller 3 is 1.5~1.6; the false twister speed ratio is 1.7~1.9; the processing speed of the second feeding roller 7 is 500~600 m / min; the overfeed rate of the setting overfeed roller 10 is -2~-3.0%.

[0057] Specifically, for ease of understanding, the following is an explanation of a specific example of a method for preparing ultra-fine denier porous high-elastic polyester filament in conjunction with the preparation of ultra-fine denier porous high-elastic polyester filament:

[0058] In one example, ultra-fine denier porous high-elastic polyester filament is produced using polyester POY 1 as raw material through the DTY process;

[0059] Among them, the specification of polyester POY 1 is 33dtex / 72f, the elongation at break is 115%, the breaking strength is 2.8cN / dtex, and the thermal stress is 26cN.

[0060] like Figure 1 As shown in the figure, the DTY process includes: polyester POY 1 → pre-netting device 2 → first feeding roller 3 → first deformation hot box 4 → cooling device 5 → false twister 6 → second feeding roller 7 → middle netting device → second setting hot box 9 → setting overfeed roller 10 → yarn detector 11 → upper oil wheel 12 → oil wheel yarn guide 13 → winding device 14.

[0061] The devices used in the DTY process include a first deformation hot box 4, a cooling device 5, a false twister 6, a middle netting device 8, a tanker yarn guide 13 and a winding device 14.

[0062] like Figure 9 and Figure 10 As shown, the first deformed heat box 4 is a double semicircular structure, an upper and lower openable and closable heat box, and a circular heat box formed by closing two semicircular heat boxes of the same size; the inner wall of the first deformed heat box 4 has a serpentine distribution heating tube 41.

[0063] like Figure 11 and Figure 12As shown, the cooling device 5 is constructed as a truncated cone-shaped hollow water cooling device, including a hollow inner truncated cone 51 and a hollow outer truncated cone 52 arranged inside and outside, and a pipeline arrangement space with upper and lower sealing plates is formed between the hollow inner truncated cone 51 and the hollow outer truncated cone 52. A plurality of interconnected cold pipes 53 are evenly distributed in the pipeline arrangement space, and the plurality of cold pipes 53 are arranged in contact with the hollow inner truncated cone 51. An upper opening 54 is provided on the upper sealing plate of the pipeline arrangement space, and a lower opening 55 is provided on the lower sealing plate of the pipeline arrangement space. The upper opening 54 and the lower opening 55 are respectively connected to the two ends of the cold pipe 53.

[0064] like Figure 8 As shown, the false twister 6 uses a ceramic disc 22, a polyurethane disc 23, and a knife-edge disc 24 in a 1-6-1 combination mode, and the hardness of the polyurethane disc 23 is 80A / D.

[0065] like Figure 6 and Figure 7 As shown, the middle network device 8 adopts a double-channel network nozzle with a truncated cone-shaped hole. The diameter of the small hole of the truncated cone-shaped network nozzle is 0.7 mm, and the diameter of the large hole is 0.9 mm. Figure 13 As shown, the wire strips are at an angle of 15° with the dual channels in the middle network device 8, and the airflow is collected on the wire strips through the dual channels to form sheet-like network points. Before the wire strips enter the wire-travel channel, the angle between the direction of movement of the wire strips and the direction of the wire-travel channel is 100°~110°; when the wire strips just leave the wire-travel channel, the angle between the direction of movement of the wire strips and the direction of the wire-travel channel is 100°~110° and passes through the cylindrical wire guide; the angle is designed within this range to make the wire strips tightened in the wire-travel channel to facilitate the formation of network points, while reducing the friction with the wire guide of the wire-travel channel. The airflow passes through the large diameter of the truncated cone-shaped dual-channel network nozzle to the small diameter of the mouth, and the two airflows are collected at a certain angle to form sheet-like nodes on the wire strips. Because the wire strips are relatively thin, the truncated cone-shaped dual-channel network nozzle makes the airflow more concentrated during operation, ensuring that the ultra-fine denier porous high-elastic network is clear and easy to disperse, and the wire strips are not easily damaged.

[0066] like Figures 2 to 5 As shown, the oil tanker wire guide 13 adopts a double-rotating oil tanker wire guide; the double-rotating oil tanker wire guide includes a groove wire guide 18, a wire guide bracket 19, a main shaft 16, a main bearing, an anti-slip wire ring 17, a spacer 20, a nut 21 and a gasket 15; one end of the main shaft 16 is fixedly connected to the inner ring of the main bearing; the other end of the main shaft 16 passes through the anti-slip wire ring 17, the spacer 20, the oil rack, the gasket 15 and the nut 21 in sequence, and the main shaft 16 is fixed to the oil rack with the nut 21;

[0067] The wire guide holder 19 is a cylindrical structure. Round holes penetrate the cylinder along its height. The round holes include a first round hole 191 and a second round hole 192. The central axis of the first round hole 191 coincides with the central axis of the cylinder, and the second round holes 192 are evenly distributed around the central axis of the cylinder around the first round hole 191. Third round holes 193 are provided on the circumference of the cylinder. The number of third round holes 193 is the same as that of second round holes 192, and each third round hole 193 is connected to a second round hole 192.

[0068] The wire guide bracket 19 is fixed to the outer ring of the main bearing through the first circular hole 192; a wire guide bearing is provided at the bottom of the groove wire guide 18, and a wire guide bearing seat is provided at the bottom of the wire guide bearing; the wire guide bearing seat is placed in the second circular hole 192 through the third circular hole 193, and a groove wire guide shaft 181 passes through one end of the second circular hole 192, the wire guide bearing seat, and the other end of the second circular hole 192 in sequence to fix the groove wire guide 18 on the wire guide bracket 19.

[0069] As the yarn passes through the rotating yarn guide, the main bearing rotates simultaneously with the grooved yarn guide, driven by its own bearings, resulting in a dual rotation. The yarn makes point contact with the grooved yarn guide, which reduces the contact surface compared to surface contact. This small contact area, combined with the dual rotation, reduces frictional resistance. Compared to existing rotating yarn guides, this solves the problem of increased resistance caused by the low winding tension of ultra-fine porous, highly elastic fibers passing through the tanker yarn guide, resulting in a large contact area and large travel angle. This reduces the breakage rate during casting and also reduces the rate of lint.

[0070] The process parameters involved in the process flow are: the air pressure of the pre-network device 2 is 0.05MPa, the air pressure of the middle network device 8 is 0.12MPa; the temperature of the first deformation hot box 4 is 175℃; the temperature of the second setting hot box 9 is 30℃; the cooling temperature is 20℃; the speed ratio of the second wire feeding roller 7 to the speed of the first wire feeding roller 3 is 1.55; the speed ratio of the false twister 6 is 1.8; the processing speed of the second wire feeding roller 7 is 520m / min; the overfeed rate of the setting overfeed roller 10 is -2.5%.

[0071] Furthermore, after the preparation is completed, the prepared ultrafine denier porous high-elastic polyester filament is tested, and the test process is as follows:

[0072] This test method refers to GB / T 14460-2015 for polyester low-stretch yarn; the broken yarn rate and dyeing M rate are based on a machine with 288 spindles.

[0073] Linear density: Fix the yarn end on the length measuring instrument, set the number of winding turns to 100 (1 turn = 1 meter), turn on the switch, and after the yarn is wound 100 times, weigh it with an electronic scale. Linear density (dtex) or fineness = measured value × 100

[0074] Oil content = [(weight of oiled wire - weight of non-oiled wire) / weight of oiled wire] × 100%

[0075] Strength and elongation: Connect the yarn end to the tensile tester, open the test program, set the pre-tension to 0.2CN, the speed to 350mm / min, the clamping length to 500mm, enter the batch number, machine number, specification, number of samples, stretching times and sample linear density value, click the OK button to confirm, and press the up key on the tensile tester keyboard to automatically test the breaking strength and elongation at break;

[0076] Network point uniformity: Take 1m long yarn, count the number of network points to get the network degree, measure the minimum distance between network points, calculate the theoretical number of network points in 1m yarn, and divide the actual number of network points by the theoretical number of network points to get the network uniformity;

[0077] Wire breakage rate: the number of broken wires per machine during one weighing process / the total number of spindles on the machine;

[0078] Dyeing M rate: After the yarn tubes are dyed for hosiery, the number of yarn tubes that are inconsistent with the standard color / the total number of yarn tubes for hosiery.

[0079] The total fineness of the tested micro-denier polyester filament is 22dtex, the elongation at break is 23.5%, the breaking strength is 4.1cN / dtex, the network point uniformity is 99.1%, the broken wire rate is 1.4%, the coefficient of variation of the elongation at break is 5%, the online tension coefficient is 1.4%, the oiling rate is 3.35%, the dyeing M rate (qualified rate) is 99.4%, the shrinkage rate is 50.6%, the residual twist is 16.8%, the appearance has no hair, snags, or tight spots, the unwinding performance is good, the post-spinning product has few broken ends, and the fabric surface is good without horizontal stripes.

[0080] In another example:

[0081] Using polyester POY as raw material, DTY process is used to produce fine denier polyester filaments;

[0082] Among them, the specification of polyester POY is 49dtex / 144f, the elongation at break is 112%, the breaking strength is 2.8cN / dtex, and the thermal stress is 38cN;

[0083] The DTY process flow includes: polyester POY 1 → pre-netting device 2 → first feeding roller 3 → first deformation hot box 4 → cooling device 5 → false twister 6 → second feeding roller 7 → middle netting device 8 → second setting hot box 9 → setting overfeed roller 10 → yarn detector 11 → upper oil wheel 12 → oil wheel yarn guide 13 → winding device 14.

[0084] The devices used in the DTY process include a first deformation hot box 4, a cooling device 5, a false twister 6, a middle netting device 8, a tanker yarn guide 13 and a winding device 14.

[0085] The first deformed heat box 4 is a double semicircular open and close heat box, which is a circular heat box formed by closing two semicircular heat boxes of the same size. The circular heat box forms two seams, and a latch is used to connect the two semicircular heat boxes at one of the seams, and the latch is used as the axis to realize the opening and closing of the heat box; the interior of the first deformed heat box 4 is a serpentine distribution heating pipe;

[0086] The cooling device 5 is constructed as a truncated cone-shaped hollow water cooling device, including a hollow inner truncated cone 51 and a hollow outer truncated cone 52 arranged inside and outside. A pipeline arrangement space with upper and lower sealing plates is formed between the hollow inner truncated cone 51 and the hollow outer truncated cone 52. A plurality of interconnected cold pipes 53 are evenly distributed in the pipeline arrangement space. The plurality of cold pipes 53 are arranged in contact with the hollow inner truncated cone 51. An upper opening 54 is provided on the upper sealing plate of the pipeline arrangement space, and a lower opening 55 is provided on the lower sealing plate of the pipeline arrangement space. The upper opening 54 and the lower opening 55 are respectively connected to the two ends of the cold pipe 53.

[0087] like Figure 8 As shown, the false twister 6 uses a ceramic disc 22, a polyurethane disc 23, and a knife-edge disc 24 in a 1-6-1 combination mode, and the hardness of the polyurethane disc 23 is 80A / D.

[0088] like Figure 6 and Figure 7 As shown, the middle network device 8 adopts a double-channel network nozzle with a truncated cone-shaped hole. The diameter of the small hole of the truncated cone-shaped network nozzle is 0.7 mm, and the diameter of the large hole is 0.9 mm. Figure 13 As shown, the wire strips form an angle of 15° with the dual channels in the middle network device 8, and the air flow is collected on the wire strips through the dual channels to form sheet-like network points. Before the wire strips enter the wire-feeding channel, the angle between the moving direction of the wire strips and the direction of the wire-feeding channel is 100°~110°; when the wire strips just leave the wire-feeding channel, the angle between the moving direction of the wire strips and the direction of the wire-feeding channel is 100°~110° and passes through the cylindrical wire guide.

[0089] like Figures 2 to 5 As shown, the oil tanker wire guide 13 adopts a double-rotating oil tanker wire guide; the double-rotating oil tanker wire guide includes a groove wire guide 18, a wire guide bracket 19, a main shaft 16, a main bearing, an anti-slip wire ring 17, a spacer 20, a nut 21 and a gasket 15; one end of the main shaft 16 is fixedly connected to the inner ring of the main bearing; the other end of the main shaft 16 passes through the anti-slip wire ring 17, the spacer 20, the oil rack, the gasket 15 and the nut 21 in sequence, and the main shaft 16 is fixed to the oil rack with the nut 21;

[0090] The wire guide holder 19 is a cylindrical structure. Round holes penetrate the cylinder along its height. The round holes include a first round hole 191 and a second round hole 192. The central axis of the first round hole 191 coincides with the central axis of the cylinder, and the second round holes 192 are evenly distributed around the central axis of the cylinder around the first round hole 191. Third round holes 193 are provided on the circumference of the cylinder. The number of third round holes 193 is the same as that of second round holes 192, and each third round hole 193 is connected to a second round hole 192.

[0091] The wire guide bracket is fixed on the outer ring of the main bearing through the large circular hole; a wire guide bearing is provided at the bottom of the groove wire guide, and a wire guide bearing seat is provided at the bottom of the wire guide bearing; the wire guide bearing seat is placed in the second circular hole through the third circular hole 193, and a groove wire guide shaft passes through one end of the second circular hole, the wire guide bearing seat, and the other end of the second circular hole in sequence to fix the groove wire guide on the wire guide bracket.

[0092] As the yarn passes through the rotating yarn guide, the main bearing rotates simultaneously with the grooved yarn guide, driven by its own bearings, resulting in a dual rotation. The yarn makes point contact with the grooved yarn guide, which reduces the contact surface compared to surface contact. This small contact area, combined with the dual rotation, reduces frictional resistance. Compared to existing rotating yarn guides, this solves the problem of increased resistance caused by the low winding tension of ultra-fine porous, highly elastic fibers passing through the tanker yarn guide, resulting in a large contact area and large travel angle. This reduces the breakage rate during casting and also reduces the rate of lint.

[0093] The process parameters involved in the process flow are: the air pressure of the pre-network device 2 is 0.04MPa, and the air pressure of the middle network device 8 is 0.15MPa; the temperature of the first deformation hot box 4 is 178℃; the temperature of the second setting hot box 9 is 35℃; the cooling temperature is 21℃; the speed ratio of the second wire feeding roller 7 to the speed of the first wire feeding roller 3 is 1.54; the speed ratio of the false twister 6 is 1.75; the processing speed of the second wire feeding roller 7 is 540m / min; the overfeed rate of the setting overfeed roller 10 is -3.0%.

[0094] Furthermore, after the preparation is completed, the prepared ultrafine denier porous high-elastic polyester filament is tested, and the test process is as follows:

[0095] This test method refers to GB / T 14460-2015 for polyester low-stretch yarn; the broken yarn rate and dyeing M rate are based on a machine with 288 spindles.

[0096] Linear density: Fix the yarn end on the length measuring instrument, set the number of winding turns to 100 (1 turn = 1 meter), turn on the switch, and after the yarn is wound 100 times, weigh it with an electronic scale. Linear density (dtex) or fineness = measured value × 100;

[0097] Oil content = [(weight of oiled wire - weight of non-oiled wire) / weight of oiled wire] × 100%;

[0098] Strength and elongation: Connect the yarn end to the tensile tester, open the test program, set the pre-tension to 0.2CN, the speed to 350mm / min, the clamping length to 500mm, enter the batch number, machine number, specification, number of samples, stretching times and sample linear density value, click the OK button to confirm, and press the up key on the tensile tester keyboard to automatically test the breaking strength and elongation at break;

[0099] Network point uniformity: Take 1m long yarn, count the number of network points to get the network degree, measure the minimum distance between network points, calculate the theoretical number of network points in 1m yarn, and divide the actual number of network points by the theoretical number of network points to get the network uniformity;

[0100] Wire breakage rate: the number of broken wires per machine during one weighing process / the total number of spindles on the machine;

[0101] Dyeing M rate: After the yarn tubes are dyed for hosiery, the number of yarn tubes that are inconsistent with the standard color / the total number of yarn tubes for hosiery.

[0102] The ultra-fine denier porous high-elastic polyester filament produced through testing has a total fineness of 35dtex, an elongation at break of 23.2%, a breaking strength of 4.18cN / dtex, a network point uniformity of 99.3%, a broken wire rate of 1.4%, a coefficient of variation of elongation at break of 4.6%, an online tension coefficient of 1.36%, an oiling rate of 3.26%, a dyeing M rate (qualified rate) of 99.2%, a shrinkage rate of 49.6%, a residual twist of 17.4%, and an appearance without hairy wires, snagged wires, or tight spots. After textile production, the yarn has few broken ends, and the fabric surface is good without horizontal stripes.

[0103] In another example:

[0104] Using polyester POY as raw material, DTY process is used to produce fine denier polyester filaments;

[0105] Among them, the specification of polyester POY is 25dtex / 48f, the elongation at break is 113%, the breaking strength is 2.8cN / dtex, and the thermal stress is 20cN.

[0106] The DTY process flow includes: polyester POY 1 → pre-netting device 2 → first feeding roller 3 → first deformation hot box 4 → cooling device 5 → false twister 6 → second feeding roller 7 → middle netting device 8 → second setting hot box 9 → setting overfeed roller 10 → yarn detector 11 → upper oil wheel 12 → oil wheel yarn guide 13 → winding device 14.

[0107] The devices used in the DTY process include a first deformation hot box 4, a cooling device 5, a false twister 6, a middle netting device 8, a tanker yarn guide 13 and a winding device 14.

[0108] like Figure 9 and Figure 10 As shown, the first deformed heat box 4 is a double semicircular open and close heat box, which is a circular heat box formed by closing two semicircular heat boxes of the same size. The circular heat box forms two seams, and a pin is used to connect the two semicircular heat boxes at one of the seams, and the opening and closing of the heat box are realized with the pin as the axis; the interior of the first deformed heat box 4 is a serpentine distributed heating tube.

[0109] like Figure 11 and Figure 12 As shown, the cooling device 5 is constructed as a truncated cone-shaped hollow water cooling device, including a hollow inner truncated cone 51 and a hollow outer truncated cone 52 arranged inside and outside, and a pipeline arrangement space with upper and lower sealing plates is formed between the hollow inner truncated cone 51 and the hollow outer truncated cone 52. A plurality of interconnected cold pipes 53 are evenly distributed in the pipeline arrangement space, and the plurality of cold pipes 53 are arranged in contact with the hollow inner truncated cone 51. An upper opening 54 is provided on the upper sealing plate of the pipeline arrangement space, and a lower opening 55 is provided on the lower sealing plate of the pipeline arrangement space. The upper opening 54 and the lower opening 55 are respectively connected to the two ends of the cold pipe 53.

[0110] like Figure 8 As shown, the false twister 6 uses a ceramic disc 22, a polyurethane disc 23, and a knife-edge disc 24 in a 1-6-1 combination mode, and the hardness of the polyurethane disc 23 is 80A / D.

[0111] like Figure 6 and Figure 7 As shown, the middle network device 8 adopts a double-channel network nozzle with a truncated cone-shaped hole. The diameter of the small hole of the truncated cone-shaped network nozzle is 0.7 mm, and the diameter of the large hole is 0.9 mm. Figure 13 As shown, the wire strips are at an angle of 15° with the dual channels in the middle network device 8, and the airflow is collected on the wire strips through the dual channels to form sheet-like network points. Before the wire strips enter the wire-travel channel, the angle between the direction of movement of the wire strips and the direction of the wire-travel channel is 100°~110°; when the wire strips just leave the wire-travel channel, the angle between the direction of movement of the wire strips and the direction of the wire-travel channel is 100°~110° and passes through the cylindrical wire guide; the angle is designed within this range to make the wire strips tightened in the wire-travel channel to facilitate the formation of network points, while reducing the friction with the wire guide of the wire-travel channel. The airflow passes through the large diameter of the truncated cone-shaped dual-channel network nozzle to the small diameter of the mouth, and the two airflows are collected at a certain angle to form sheet-like nodes on the wire strips. Because the wire strips are relatively thin, the truncated cone-shaped dual-channel network nozzle makes the airflow more concentrated during operation, ensuring that the ultra-fine denier porous high-elastic network is clear and easy to disperse, and the wire strips are not easily damaged.

[0112] like Figures 2 to 5 As shown, the oil tanker wire guide 13 adopts a double-rotating oil tanker wire guide; the double-rotating oil tanker wire guide includes a groove wire guide 18, a wire guide bracket 19, a main shaft 16, a main bearing, an anti-slip wire ring 17, a spacer 20, a nut 21 and a gasket 15; one end of the main shaft 16 is fixedly connected to the inner ring of the main bearing; the other end of the main shaft 16 passes through the anti-slip wire ring 17, the spacer 20, the oil rack, the gasket 15 and the nut 21 in sequence, and the main shaft 16 is fixed to the oil rack with the nut 21;

[0113] The wire guide holder 19 is a cylindrical structure. Round holes penetrate the cylinder along its height. The round holes include a first round hole 191 and a second round hole 192. The central axis of the first round hole 191 coincides with the central axis of the cylinder, and the second round holes 192 are evenly distributed around the central axis of the cylinder around the first round hole 191. Third round holes 193 are provided on the circumference of the cylinder. The number of third round holes 193 is the same as that of second round holes 192, and each third round hole 193 is connected to a second round hole 192.

[0114] The wire guide bracket 19 is fixed to the outer ring of the main bearing through the first circular hole 192; a wire guide bearing is provided at the bottom of the groove wire guide 18, and a wire guide bearing seat is provided at the bottom of the wire guide bearing; the wire guide bearing seat is placed in the second circular hole 192 through the third circular hole 193, and a groove wire guide shaft 181 passes through one end of the second circular hole 192, the wire guide bearing seat, and the other end of the second circular hole 192 in sequence to fix the groove wire guide 18 on the wire guide bracket 19.

[0115] As the yarn passes through the rotating yarn guide, the main bearing rotates simultaneously with the grooved yarn guide, driven by its own bearings, resulting in a dual rotation. The yarn makes point contact with the grooved yarn guide, which reduces the contact surface compared to surface contact. This small contact area, combined with the dual rotation, reduces frictional resistance. Compared to existing rotating yarn guides, this solves the problem of increased resistance caused by the low winding tension of ultra-fine porous, highly elastic fibers passing through the tanker yarn guide, resulting in a large contact area and large travel angle. This reduces the breakage rate during casting and also reduces the rate of lint.

[0116] The process parameters involved in the process flow are: the air pressure of the pre-network device 2 is 0.03MPa, and the air pressure of the middle network device 8 is 0.13MPa; the temperature of the first deformation hot box 4 is 172℃; the temperature of the second setting hot box 9 is 33℃; the cooling temperature is 22℃; the speed ratio of the second wire feeding roller 7 to the speed of the first wire feeding roller 3 is 1.56; the speed ratio of the false twister 6 is 1.78; the processing speed of the second wire feeding roller 7 is 520m / min; the overfeed rate of the setting overfeed roller 10 is -2.8%.

[0117] Furthermore, after the preparation is completed, the prepared ultrafine denier porous high-elastic polyester filament is tested, and the test process is as follows:

[0118] This test method refers to GB / T 14460-2015 for polyester low-stretch yarn; the broken yarn rate and dyeing M rate are based on a machine with 288 spindles.

[0119] Linear density: Fix the yarn end on the length measuring instrument, set the number of winding turns to 100 (1 turn = 1 meter), turn on the switch, and after the yarn is wound 100 times, weigh it with an electronic scale. Linear density (dtex) or fineness = measured value × 100;

[0120] Oil content = [(weight of oiled wire - weight of non-oiled wire) / weight of oiled wire] × 100%;

[0121] Strength and elongation: Connect the yarn end to the tensile tester, open the test program, set the pre-tension to 0.2CN, the speed to 350mm / min, the clamping length to 500mm, enter the batch number, machine number, specification, number of samples, stretching times and sample linear density value, click the OK button to confirm, and press the up key on the tensile tester keyboard to automatically test the breaking strength and elongation at break;

[0122] Network point uniformity: Take 1m long yarn, count the number of its network points to get the network degree, measure the minimum distance between the network points, calculate the theoretical number of networks in 1m yarn, and divide the actual number of networks by the theoretical number of networks to get the network uniformity.

[0123] Wire breakage rate: the number of broken wires per machine during one weighing process / the total number of spindles on the machine;

[0124] Dyeing M rate: After the yarn tubes are dyed for hosiery, the number of yarn tubes that are inconsistent with the standard color / the total number of yarn tubes for hosiery.

[0125] The ultra-fine denier porous high-elastic polyester filament produced through testing has a total fineness of 16.4dtex, an elongation at break of 23%, a breaking strength of 4.15cN / dtex, a network point uniformity of 99.2%, a broken wire rate of 1.6%, a coefficient of variation of elongation at break of 4.5%, an online tension coefficient of 1.32%, an oiling rate of 3.3%, a dyeing M rate (qualified rate) of 99.3%, a shrinkage rate of 50.2%, a residual twist of 18.1%, and an appearance without hairy wires, snagged wires, or tight spots. After textile production, the fabric has few broken ends, a good surface, and no horizontal stripes.

[0126] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0127] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A production equipment for ultra-fine denier porous high-elastic polyester filament, comprising a pre-netting device, a first feeding roller, a first deformation hot box, a cooling device, a false twister, a second feeding roller, a middle netting device, a second setting hot box, a setting overfeed roller, a yarn detector, an oiling wheel, an oiling wheel yarn guide, and a winding device, which are arranged according to the polyester production process. The equipment is characterized by: The first deformation heat box includes two semicircles installed up and down, and heating tubes are distributed in a serpentine shape inside the first deformation heat box; The shape of the nozzle of the network nozzle of the middle network device is constructed as a truncated cone, and the bottom of the middle network device is provided with a cylindrical wire guide; the middle network device includes two air flow channels with an angle of 25° to 35° between each other. Before the wire strip enters the wire travel channel adjacent to the middle network device, the movement direction of the wire strip is at an angle of 100° to 110° with the direction of the wire travel channel. When the wire strip just comes out of the wire travel channel, the movement direction of the wire strip is at an angle of 100° to 110° with the direction of the wire travel channel and passes through the cylindrical wire guide. After the wire strip comes out of the wire travel channel, the airflow flowing through the two air flow channels converges on the wire strip, so that the wire strip forms a sheet-like network point. The oil tanker wire guide includes a main shaft, a groove wire guide and a wire guide bracket. The groove wire guide and the wire guide bracket are both sleeved and mounted on the main shaft. The wire guide bracket is constructed as a cylindrical structure. A first circular hole, a second circular hole and a third circular hole are opened on the wire guide bracket. The first circular hole and the second circular hole both pass through the height direction of the wire guide bracket. The axis of the first circular hole coincides with the axis of the cylindrical wire guide bracket. The second circular holes are spaced apart around the first circular hole. The third circular holes are arranged along the circumference of the wire guide bracket, and each third circular hole is connected to one of the second circular holes. A wire guide bearing is provided at the bottom of the groove wire guide. A wire guide bearing seat is provided at the bottom of the wire guide bearing. The wire guide bearing seat is placed in the second circular hole through the third circular hole. The groove wire guide is fixed to the wire guide bracket after the groove wire guide shaft passes through one end of the second circular hole, the wire guide bearing seat and the other end of the second circular hole in sequence. The wire guide bearing rotates synchronously with the main bearing.

2. The equipment for preparing ultra-fine denier porous high-elastic polyester filament according to claim 1, characterized in that: The oil tanker wire guide also includes a main bearing, an anti-slip wire ring, a spacer, an oil rack, a gasket and a nut. The wire guide bracket is fixed to the outer ring of the main bearing through the first circular hole. One end of the main shaft is fixed to the inner ring of the main bearing. The other end of the main shaft passes through the anti-slip wire ring, the spacer, the oil rack, the gasket and the nut in sequence, and is fixed to the oil rack through the nut.

3. The equipment for preparing ultra-fine denier porous high-elastic polyester filament according to claim 1, characterized in that: The diameter of the small opening of the network nozzle is 0.7mm±0.05mm, and the diameter of the large opening of the network nozzle is 0.9mm±0.05mm.

4. The equipment for preparing ultra-fine denier porous high-elastic polyester filament according to claim 1, characterized in that: The cooling device is constructed as a truncated cone-shaped hollow water cooling device, including a hollow inner truncated cone and a hollow outer truncated cone arranged inside and outside, a pipeline arrangement space with upper and lower sealing plates formed between the hollow inner truncated cone and the hollow outer truncated cone, a plurality of interconnected cold pipes are evenly distributed in the pipeline arrangement space, and the plurality of cold pipes are arranged in contact with the hollow inner truncated cone, an upper opening is provided on the upper sealing plate of the pipeline arrangement space, and a lower opening is provided on the lower sealing plate of the pipeline arrangement space, and the upper opening and the lower opening are respectively connected to the two ends of the cold pipe.

5. The equipment for preparing ultra-fine denier porous high-elastic polyester filament according to claim 4, characterized in that: The diameter of the small opening of the inner frustum is 3cm-5cm, the diameter of the large opening of the inner frustum is 4cm-6cm, the diameter of the small opening of the outer frustum is 5cm-7cm, and the diameter of the large opening of the outer frustum is 6cm-8cm.

6. The equipment for preparing ultra-fine denier porous high-elastic polyester filament according to claim 1, characterized in that: The false twister includes a ceramic disc, a polyurethane disc and a knife-edge disc. The ceramic disc includes one, the polyurethane discs include six, and the knife-edge disc includes one. Based on the false twist effect, the false twister forms a 1-6-1 combination of the ceramic disc, the polyurethane disc and the knife-edge disc. The hardness of the polyurethane disc is 78A / D-80A / D, and the thickness is 6mm-6.8mm.

7. A method for preparing ultra-fine denier porous high-elastic polyester filament, characterized in that: The method is implemented based on the preparation equipment of the ultra-fine denier porous high-elastic polyester filament according to any one of claims 1 to 6, and the method comprises: Select the target polyester of the target raw material; The target polyester is provided to the preparation equipment of the ultra-fine denier porous high-elastic polyester filament, so that the target polyester is prepared into the ultra-fine denier porous high-elastic polyester filament according to the following process flow: Target polyester → pre-intertwining device → first feeding roller → first texturing hot box → cooling device → false twister → second feeding roller → middle intertwining device → second setting hot box → setting overfeed roller → yarn detector → upper oil wheel → oil wheel yarn guide → winding device → ultra-fine denier porous high-elastic polyester filament.

8. The method for preparing ultra-fine denier porous high-elastic polyester filament according to claim 7, characterized in that: The target polyester is polyester POY, and the specification of the polyester POY is 25dtex / 48f, the elongation at break is 113%, the breaking strength is 2.8cN / dtex, and the thermal stress is 20cN.

9. The method for preparing ultra-fine denier porous high-elastic polyester filament according to claim 7, characterized in that: The air pressure of the pre-net is 0.03~0.05MPa, the air pressure of the mid-net is 0.1~0.18MPa, and the oil filling rate of the oil tanker is 3.3-3.8%.

10. The method for preparing ultra-fine denier porous high-elastic polyester filament according to claim 7, characterized in that: The temperature of the first deformation hot box is 170~180℃; the temperature of the second setting hot box is 30~50℃; the cooling temperature is 20~25℃; the ratio of the speed of the second feeding roller to the speed of the first feeding roller is 1.5~1.6; the speed ratio of the false twister is 1.7~1.9; the processing speed of the second feeding roller is 500~600 m / min; the overfeed rate of the setting overfeed roller is -2~-3.0%.

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