Thermoplastic polyester elastomer yarn and preparation method therefor

Abstract

The present invention provides a thermoplastic polyester elastomer yarn and a preparation method thereof.SOLUTION: A method for preparing a thermoplastic polyester elastomer yarn includes providing a thermoplastic polyester elastomer and performing a melt spinning process with the thermoplastic polyester elastomer to prepare the thermoplastic polyester elastomer yarn. The polyester elastomer includes 50% to 70% by weight of a soft segment and 30% to 50% by weight of a hard segment, and has an intrinsic viscosity of 1. 1dL / g to 1. 6dL / g. A spinneret used in the melt spinning process is formed with a patterned nozzle, the patterned nozzle comprises a splicing zone and a plurality of sliver treatment zones, the plurality of sliver treatment zones are arranged symmetrically about the splicing zone, each sliver treatment zone is communicated with the splicing zone, and the number of the sliver treatment zones is not less than 3.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a thermoplastic polyester elastomer yarn and a method for producing the same, and more particularly to a high denier thermoplastic polyester elastomer yarn and a method for producing the same. [Background technology]

[0002] Currently, the majority of fibers are produced by dry spinning. In the dry spinning process, a polymer is dissolved in a solvent to form a spinning solution, which is then passed through an extruder and a die to form the spinning solution. The spinning solution then enters a heated gas atmosphere, where the solvent in the spinning solution evaporates at high temperatures, forming polymer filaments. However, traditional dry spinning requires the use of large amounts of solvent during the process, which creates numerous environmental issues.

[0003] To ensure complete evaporation of the solvent, the thickness of the single yarn must not be too high, generally between 10 and 20 denier (den). To obtain a yarn with a higher denier, multiple yarns must be combined to form a ply yarn by thickening with friction or by air pressure. However, depending on the bonding method, the appearance of each ply yarn will vary greatly, and quality will generally vary.

[0004] When melt spinning is used to produce yarn, it is possible to produce yarn with a high denier, but during the weaving process, the contact area is small and the frictional force is insufficient, which can cause the yarn to slip off the cake and break.

[0005] Therefore, improving the quality of high denier yarns and their subsequent processing by improving the manufacturing method is one of the important issues that this project aims to solve. Summary of the Invention [Problem to be solved by the invention]

[0006] The technical problem to be solved by the present invention is to provide a thermoplastic polyester elastomer yarn and a method for producing the same in response to the shortcomings of the prior art. [Means for solving the problem]

[0007] To solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a method for producing a thermoplastic polyester elastomer yarn. The method for producing the thermoplastic polyester elastomer yarn includes providing a thermoplastic polyester elastomer and producing a thermoplastic polyester elastomer yarn by performing a melt spinning process using the thermoplastic polyester elastomer. The thermoplastic polyester elastomer contains 50% to 70% by weight of a soft segment and 30% to 50% by weight of a hard segment, and the intrinsic viscosity of the thermoplastic polyester elastomer is 1.1 dL / g to 1.6 dL / g. The spinneret used in the melt spinning process is formed with a patterned nozzle, which includes a yarn combining zone and multiple sliver treatment zones. The multiple sliver treatment zones are arranged symmetrically around the yarn combining zone, and each sliver treatment zone is connected to the yarn combining zone. The number of sliver treatment zones is three or more.

[0008] In some embodiments, the hard segment of the thermoplastic polyester elastomer comprises polyethylene terephthalate, polybutylene terephthalate, or a combination thereof.

[0009] In one embodiment, the hard segments of the thermoplastic polyester elastomer are derived from recycled waste.

[0010] In some embodiments, the soft segment of the thermoplastic polyester elastomer comprises polyethylene glycol, polyether polyol, polytetramethylene ether glycol, or a combination thereof.

[0011] In one embodiment, the diameter of the sliver treatment zone is between 0.4 mm and 3.0 mm.

[0012] In one embodiment, the distance between two adjacent sliver processing zones is 0.05 mm to 3.0 mm.

[0013] In one embodiment, the ratio of the diameter of the sliver processing zone to the distance between two adjacent sliver processing zones is 0.133 to 60.

[0014] In one embodiment, the yarn combining zone has a plurality of interconnecting connecting segments, the number of connecting segments being equal to the number of sliver processing zones, and each connecting segment being interconnected to one of the sliver processing zones.

[0015] In one embodiment, the length of the connecting segment is between 0.1 mm and 0.3 mm.

[0016] In one embodiment, the width of the connection segment is between 0.01 mm and 0.5 mm.

[0017] In one embodiment, the ratio of the diameter of the sliver treatment zone to the length of the connection segment is between 0.133 and 30.

[0018] In one embodiment, the ratio of the diameter of the sliver treatment zone to the width of the connection segment is between 0.8 and 300.

[0019] In one embodiment, the radius of curvature of the sliver treatment portion is 10 μm to 45 μm.

[0020] Another technical means adopted by the present invention to solve the above technical problems is to provide a thermoplastic polyester elastomer yarn. The thermoplastic polyester elastomer yarn is manufactured by the above manufacturing method, and the thermoplastic polyester elastomer yarn is integrally molded. The thermoplastic polyester elastomer yarn has a plurality of sliver-processed portions protruding outward, and has an outer radius and an inner radius, the outer radius being larger than the inner radius, and the ratio of the outer radius to the inner radius is 1.2 to 5.

[0021] In one embodiment, the thermoplastic polyester elastomer yarn has a denier of 15-100.

[0022] In one embodiment, the outer radius is between 40 μm and 170 μm.

[0023] In one embodiment, the inner radius is between 25 μm and 115 μm. [Effects of the Invention]

[0024] One of the advantageous effects of the present invention is that the thermoplastic polyester elastomer yarn and its manufacturing method according to the present invention produce a thermoplastic polyester elastomer yarn with a high surface area and a high denier number due to the following technical features: "the intrinsic viscosity of the thermoplastic polyester elastomer is 1.1 dL / g to 1.6 dL / g," "the patterned nozzle includes a yarn combining zone and multiple sliver treatment zones," and "the multiple sliver treatment zones are arranged symmetrically around the yarn combining zone, and each sliver treatment zone is in communication with the yarn combining zone." [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 1 is a three-dimensional schematic diagram of a spinneret of the present invention. [Figure 2] FIG. 1 is a schematic diagram of a patterned nozzle according to a first embodiment of the method for producing a thermoplastic polyester elastomer yarn of the present invention. [Figure 3]1 is a schematic diagram of a thermoplastic polyester elastomer yarn of the present invention. [Figure 4] FIG. 2 is a schematic diagram of a patterned nozzle according to a second embodiment of the method for producing a thermoplastic polyester elastomer yarn of the present invention. [Figure 5] FIG. 10 is a schematic diagram of a patterned nozzle according to a third embodiment of the method for producing a thermoplastic polyester elastomer yarn of the present invention. [Figure 6] FIG. 10 is a schematic diagram of a patterned nozzle according to a third embodiment of the present invention. [Figure 7] FIG. 2 is a schematic diagram of a patterned nozzle according to Comparative Example 1 of the present invention. [Figure 8] FIG. 1 is a schematic diagram of a patterned nozzle according to Comparative Example 2 of the present invention. [Figure 9] FIG. 10 is a schematic diagram of a patterned nozzle according to Comparative Example 3 of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] To better understand the features and technical contents of the present invention, please refer to the following detailed description of the present invention and the accompanying drawings, which are provided for reference and explanation only and do not limit the scope of the present invention.

[0027] The following describes the implementation of the "thermoplastic polyester elastomer yarn and its manufacturing method" according to the present invention through certain specific embodiments, and those skilled in the art will be able to understand the advantages and effects of the present invention based on the content disclosed herein. The present invention can be implemented or applied in other different specific embodiments, and various modifications and changes can be made to the details herein based on different perspectives and applications without departing from the concept of the present invention. It should be noted in advance that the accompanying drawings of the present invention are for simple schematic illustrations and are not drawn to scale. The technical content of the present invention will be described in more detail based on the following embodiments, but the disclosed content does not limit the scope of protection of the present invention. Furthermore, the term "or" used in this specification may include any one or more combinations of the related listed items, depending on the actual situation.

[0028] In order to solve the above problems, the present invention provides a thermoplastic polyester elastomer yarn and a manufacturing method thereof, which can produce high-denier yarn with uniform quality by selecting materials and designing nozzle patterns.

[0029] In the present invention, the thermoplastic polyester elastomer yarn is produced by melt spinning, and the produced thermoplastic polyester elastomer yarn is integrally molded, eliminating the need to combine multiple yarns to form a laminated yarn by friction thickening or air pressurization. Therefore, the method for producing the thermoplastic polyester elastomer yarn of the present invention has the advantage of being simplified. Furthermore, the thermoplastic polyester elastomer yarn of the present invention has an appropriate surface area, which provides sufficient friction during the weaving process and makes it less likely to slip off the cake and break.

[0030] The method for producing a thermoplastic polyester elastomer yarn according to the present invention includes a step of providing a thermoplastic polyester elastomer (step S1), and a step of producing a thermoplastic polyester elastomer yarn by performing a melt spinning process using the thermoplastic polyester elastomer (step S2).

[0031] In step S1, the selected thermoplastic polyester elastomer contains 50% to 70% by weight of soft segments and 30% to 50% by weight of hard segments. In a preferred embodiment, the content of the soft segments in the thermoplastic polyester elastomer is higher than the content of the hard segments.

[0032] That is, the soft segment content in the thermoplastic polyester elastomer is more than 50% by weight and not more than 70% by weight, for example, the soft segment content is a positive number in the range of 50% by weight to 70% by weight. The hard segment content in the thermoplastic polyester elastomer is 30% by weight to less than 50% by weight, for example, the hard segment content is a positive number in the range of 30% by weight to less than 50% by weight.

[0033] In an exemplary embodiment, the soft segment in the thermoplastic polyester elastomer may be formed of polyethylene glycol (PEG), polyether polyol (PPG), polytetramethylene ether glycol (PTMEG), or a combination thereof. The weight average molecular weight of the monomer for constituting the soft segment may be 500 g / mol to 4000 g / mol, for example, any positive integer between 500 g / mol and 4000 g / mol.

[0034] In one exemplary embodiment, the hard segments of the thermoplastic polyester elastomer may be formed of polyethylene terephthalate, polybutylene terephthalate, or a combination thereof, but the present invention is not limited thereto. In another exemplary embodiment, the hard segments of the thermoplastic polyester elastomer may be derived from recycled waste. Specifically, the hard segments of the thermoplastic polyester elastomer may be recycled thermoplastic polyester elastomer (rTPEE) obtained by depolymerizing recycled PET waste such as PET bottles.

[0035] The intrinsic viscosity of the thermoplastic polyester elastomer may be 1.1 dL / g to 1.6 dL / g, for example, 1.15 dL / g, 1.20 dL / g, 1.25 dL / g, 1.30 dL / g, 1.35 dL / g, 1.40 dL / g, 1.45 dL / g, 1.50 dL / g, or 1.55 dL / g. Within this intrinsic viscosity range, thermoplastic polyester elastomers are particularly suitable for producing the high denier thermoplastic polyester elastomer yarns of the present invention.

[0036] In step S2, the melt spinning process involves feeding thermoplastic polyester elastomer particles into the feed tank of the melt spinning machine, transferring them via a screw to a heating section, and heating them to a temperature of 190°C to 270°C to form a molten thermoplastic polyester elastomer. The molten thermoplastic polyester elastomer passes through a filtration device and is transported to a spinning box via a raw material tube. The molten thermoplastic polyester elastomer is extruded in a fixed amount through a spinning nozzle at a spinning temperature of 200°C to 270°C, cooled with cold air, oiled, and wound at a winding speed of 500 m / min to 2000 m / min to obtain a thermoplastic polyester elastomer yarn.

[0037] As shown in Figures 1 and 2, in the spinning box, the pressurized molten thermoplastic polyester elastomer is injected through a patterned nozzle 1 in a spinneret Z, and after cooling, a thermoplastic polyester elastomer yarn is obtained.

[0038] In the present invention, the design includes a patterned nozzle 1 in the spinneret Z, multiple sliver treatment zones 10, and a yarn combining zone 20, and the multiple sliver treatment zones 10 are arranged symmetrically around the yarn combining zone 20, and each sliver treatment zone 10 is connected to the yarn combining zone 20.

[0039] In the first embodiment (the structure shown in FIG. 2 ), the patterned nozzle 1 includes four sliver processing zones 10, which are arranged symmetrically around the yarn combining zone 20. The yarn combining zones 20 include connecting segments 21 that communicate with each other, and the connecting segments 21 are distributed radially symmetrically. Specifically, the number of connecting segments 21 is the same as the number of sliver processing zones 10, i.e., the yarn combining zone 20 includes four connecting segments 21. Each connecting segment 21 communicates with one of the sliver processing zones 10.

[0040] It should be noted that the pressurized molten thermoplastic polyester elastomer has a shape corresponding to the patterned nozzle 1 immediately after passing through the patterned nozzle 1. After leaving the patterned nozzle 1, the external pressure is reduced, causing the thermoplastic polyester elastomer to expand and balance the pressure inside and outside the material. Therefore, the external shape of the thermoplastic polyester elastomer yarn may not be completely identical to the shape of the patterned nozzle 1, but may partially correspond to it.

[0041] To explain further, given the original shape of the patterned nozzle, the thermoplastic polyester elastomer yarn theoretically has an arc surface (sliver treatment zone 10) with an angle of more than 270°, but due to the influence of expansion, the actual thermoplastic polyester elastomer yarn may only maintain an arc surface with an angle of less than 200°. The arc portion of the thermoplastic polyester elastomer yarn can increase the surface area of ​​the thermoplastic polyester elastomer yarn and improve the frictional force between the thermoplastic polyester elastomer yarns in subsequent processes.

[0042] According to the above design, after passing through the multiple sliver treatment zones 10, the thermoplastic polyester elastomer expands to form a structure (sliver treatment zone) similar to a single yarn. After passing through the yarn combining zone 20, the thermoplastic polyester elastomer expands to communicate with the multiple sliver treatment zones, and the interior of the thermoplastic polyester elastomer yarn becomes solid. As a result, the thermoplastic polyester elastomer yarn of the present invention is integrally molded and has a solid state.

[0043] In the first embodiment, the patterned nozzle 1 has four sliver processing zones 10, and therefore, by going through the steps S1 and S2, a structure similar to a structure in which four yarns are combined together is obtained.

[0044] 3, in the cross section of the thermoplastic polyester elastomer yarn 3, the thermoplastic polyester elastomer yarn 3 has four outwardly protruding sliver treatment sections 30, each having an arcuate surface 31, which can increase the surface area of ​​the thermoplastic polyester elastomer yarn 3. As described above, the sliver treatment sections 30 are mainly formed of the thermoplastic polyester elastomer that has passed through the sliver treatment zone 10.

[0045] The radius of curvature of the sliver processing section 30 can be measured based on the arcuate surface 31 of the thermoplastic polyester elastomer yarn 3. In an exemplary embodiment, the radius of curvature of the sliver processing section 30 is any number between 10 μm and 45 μm, for example, the radius of curvature of the sliver processing section 30 may be any positive integer between 10 μm and 45 μm.

[0046] Furthermore, as shown in FIG. 2, in designing the size of the patterned nozzle 1, the sliver processing zone 10 may be circular or have another geometric shape. When the sliver processing zone 10 is circular, the diameter x of the sliver processing zone 10 may be 0.4 mm to 3.0 mm. For example, the diameter x of the sliver processing zone 10 may be 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.4 mm, 2.6 mm, or 2.8 mm. When the sliver processing zone 10 has another geometric shape, the major axis of the geometric shape is 0.4 mm to 3.0 mm.

[0047] The distance y between two adjacent sliver processing zones 10 may be 0.05 mm to 3.0 mm. For example, the distance y between two adjacent sliver processing zones 10 may be 0.1 mm, 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.4 mm, 2.6 mm, or 2.8 mm.

[0048] The length L of the connection segment 21 may be 0.1 mm to 0.3 mm. For example, the length L of the connection segment 21 may be 0.15 mm, 0.2 mm, or 0.25 mm. The width z of the connection segment 21 may be 0.01 mm to 0.5 mm. For example, the width z of the connection segment 21 may be 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, or 0.45 mm.

[0049] In one exemplary embodiment, in order to provide a large surface area for the thermoplastic polyester elastomer yarn, the ratio of the diameter x of the sliver treatment zone 10 to the length L of the connection segment 21 may be controlled to a value in the range of 1.33 to 30. For example, the ratio of the diameter x of the sliver treatment zone 10 to the length L of the connection segment 21 may be any positive integer between 1.33 and 30, and it should be noted that any positive integer in this range is included within the scope of the present application.

[0050] In another embodiment, the value of the ratio between the diameter x of the sliver processing zone 10 and the width z of the connection segment may be further controlled to be 0.8 to 300. For example, the value of the ratio between the diameter x of the sliver processing zone 10 and the width z of the connection segment may be a number between 0.8 and 300. For example, the value of the ratio between the diameter x of the sliver processing zone 10 and the width z of the connection segment may be any positive integer between 0.8 and 300.

[0051] In yet another embodiment, the value of the ratio between the diameter x of the sliver processing zone 10 and the distance y between two adjacent sliver processing zones 10 is 0.133 to 60. For example, the value of the ratio between the diameter x of the sliver processing zone 10 and the distance y between two adjacent sliver processing zones 10 may be any positive integer between 0.133 and 60.

[0052] Furthermore, in the structure of the thermoplastic polyester elastomer yarn, as shown in Figure 3, the cross section of the thermoplastic polyester elastomer yarn includes an outer radius r1 and an inner radius r2. The outer radius r1 is the maximum distance from the center to the outer edge of the thermoplastic polyester elastomer yarn, and the inner radius r2 is the minimum distance from the center to the outer edge of the thermoplastic polyester elastomer yarn. Therefore, the outer radius r1 is longer than the inner radius r2.

[0053] In an exemplary embodiment, the outer radius r1 is any number between 40 μm and 170 μm, and the inner radius r2 is any number between 25 μm and 115 μm. For example, the outer radius r1 may be any positive integer between 40 μm and 170 μm, and the inner radius r2 may be any positive integer between 25 μm and 115 μm.

[0054] Since the outer radius r1 is longer than the inner radius r2, the ratio between the outer radius r1 and the inner radius r2 is 1.2 to 5. For example, the ratio between the outer radius r1 and the inner radius r2 may be 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, or 4.5.

[0055] 4, the patterned nozzle 1 of the second embodiment of the present invention includes three sliver processing zones 10, which are arranged symmetrically around the yarn combining zone 20. The yarn combining zone 20 includes three radially symmetrically distributed connecting segments 21 that communicate with each other, and each connecting segment 21 communicates with one of the sliver processing zones 10. In this way, the patterned nozzle 1 of the second embodiment can produce a structure similar to a yarn combination of three yarns.

[0056] In the second embodiment, the diameter x of the sliver processing zone 10, the length L of the connection segment 21, and the width z of the connection segment 21 are similar to those in the first embodiment, and therefore will not be described again here. It is worth noting that the distance y between two adjacent sliver processing zones 10 may be 0.5 mm to 3.0 mm. For example, the distance y between two adjacent sliver processing zones 10 may be 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.4 mm, 2.6 mm, or 2.8 mm.

[0057] In an exemplary embodiment, because the thermoplastic polyester elastomer yarn has a large surface area, the ratio of the diameter x of the sliver processing zone 10 to the distance y between two adjacent sliver processing zones 10 may be further controlled to be 0.133 to 6. For example, the ratio of the diameter x of the sliver processing zone 10 to the distance y between two adjacent sliver processing zones 10 may be any positive integer between 0.133 and 6.

[0058] 5, the patterned nozzle 1 of the third embodiment of the present invention includes five sliver treatment zones 10, which are arranged symmetrically around the yarn combining zone 20. The yarn combining zone 20 includes five connecting segments 21 that are radially symmetrically distributed and communicate with each other, and each connecting segment 21 communicates with one of the sliver treatment zones 10. In this way, the patterned nozzle 1 of the third embodiment can produce a structure similar to a combination of five yarns.

[0059] In the third embodiment, the diameter x of the sliver processing zone 10, the length L of the connection segment 21, and the width z of the connection segment 21 are similar to those in the first embodiment, and therefore will not be described again here. It is worth noting that the distance y between two adjacent sliver processing zones 10 may be 0.05 mm to 2.0 mm. For example, the distance y between two adjacent sliver processing zones 10 may be 0.1 mm, 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, 1.6 mm, or 1.8 mm.

[0060] In an exemplary embodiment, because the thermoplastic polyester elastomer yarn has a large surface area, the value of the ratio between the diameter x of the sliver processing zone 10 and the distance y between two adjacent sliver processing zones 10 may be further controlled to a positive number between 0.2 and 60. For example, the value of the ratio between the diameter x of the sliver processing zone 10 and the distance y between two adjacent sliver processing zones 10 may be any positive number between 0.2 and 6. [Example]

[0061] [Experimental data] To prove that the manufacturing method of the present invention can produce high-denier thermoplastic polyester elastomer yarns that are less likely to slip off in the subsequent process, a commercially available thermoplastic polyester elastomer (product number Hytrel (registered trademark) 4056) is used as a raw material, which is heated and melted, and then extruded in a fixed amount from a spinning nozzle at a spinning temperature of 190°C to 260°C, thereby producing the thermoplastic polyester elastomer yarns of Examples 1 to 3 and Comparative Examples 1 to 3.

[0062] The difference between Examples 1 to 3 and Comparative Examples 1 to 3 is that the spinnerets have different patterned nozzles. The patterned nozzle of the spinneret in Example 1 includes four sliver treatment zones, as shown in FIG. 2 (first embodiment). The patterned nozzle of the spinneret in Example 2 includes three sliver treatment zones, as shown in FIG. 4 (second embodiment). The patterned nozzle of the spinneret in Example 3 includes four sliver treatment zones, as shown in FIG. 6, and the diameters of the sliver treatment zones and the width of the connecting segments are the same. The patterned nozzle of the spinneret in Comparative Example 1 includes two sliver treatment zones, as shown in FIG. 7. The patterned nozzle of the spinneret in Comparative Example 2 includes two sliver treatment zones, as shown in FIG. 8, and the diameters of the sliver treatment zones and the width of the connecting segments are the same. The patterned nozzle of the spinneret in Comparative Example 3 is circular, as shown in FIG. 9, i.e., the patterned nozzle of Comparative Example 3 does not have a division between the so-called sliver treatment zone and the yarn joining zone.

[0063] The thermoplastic polyester elastomer yarns of Examples 1 to 3 and Comparative Examples 1 to 3 have similar yarn strengths, which were measured using an automatic tensile tester, model number STATIMAT 4, manufactured by Textechno, in accordance with the standard measurement method of ASTM D 885. Specific yarn strengths are shown in Table 1. Furthermore, the elongation of the thermoplastic polyester elastomer yarns was measured using the automatic tensile tester in accordance with the standard measurement method of ASTM D 885, and the yarn elongation is shown in Table 1.

[0064] To measure whether the thermoplastic polyester elastomer yarn tends to slip off during subsequent processes, 128 axes of 500g thermoplastic polyester elastomer yarn were woven on a circular knitting machine. The number of times the thermoplastic polyester elastomer yarn slipped off during each weaving was counted, and the average value was used as the measurement value. The average number of times the thermoplastic polyester elastomer yarn slipped off is shown in Table 1.

[0065] [Table 1]

[0066] As can be seen from the results in Table 1, when the patterned nozzle includes three or more sliver treatment zones, the thermoplastic polyester elastomer yarn has a relatively large surface area, and in the subsequent process, it does not slip off due to lack of friction, which leads to production interruptions.

[0067] [Advantageous Effects of the Embodiments] One of the advantageous effects of the present invention is that the thermoplastic polyester elastomer yarn and its manufacturing method according to the present invention produce a thermoplastic polyester elastomer yarn with a high surface area and a high denier number due to the technical features that "the intrinsic viscosity of the thermoplastic polyester elastomer is 1.1 dL / g to 1.6 dL / g," "the patterned nozzle includes a yarn combining zone and multiple sliver treatment zones," and "the multiple sliver treatment zones are arranged symmetrically around the yarn combining zone, and each sliver treatment zone is connected to the yarn combining zone."

[0068] The above disclosure is merely a preferred embodiment of the present invention, and the scope of the claims of the present invention is not limited thereto. Therefore, any equivalent technical modifications made by utilizing the specification and drawings of the present invention are included in the scope of the claims of the present invention. [Explanation of symbols]

[0069] Z...Spinneret 1...Patterned nozzle 10...Sliver processing zone 20...Thread matching zone 21...connection segment 3...Thermoplastic polyester elastomer yarn 30...Sliver processing section 31...Arc surface x...diameter y...distance between sliver processing zones z...width L...length r1...outer radius r2...inner radius

Claims

1. A thermoplastic polyester elastomer comprising 50% by weight to 70% by weight of a soft segment and 30% by weight to 50% by weight of a hard segment, wherein the intrinsic viscosity of the thermoplastic polyester elastomer is 1.1 dL / g to 1.6 dL / g; and producing a thermoplastic polyester elastomer yarn by performing a melt spinning process using the thermoplastic polyester elastomer, A method for producing thermoplastic polyester elastomer yarn, characterized in that a spinneret used in the melt spinning process is formed with a patterned nozzle, the patterned nozzle including a yarn joining zone and a plurality of sliver treatment zones, the plurality of sliver treatment zones are arranged symmetrically around the yarn joining zone, each of the sliver treatment zones is connected to the yarn joining zone, and the number of sliver treatment zones is three or more.

2. The method for producing a thermoplastic polyester elastomer yarn according to claim 1 , wherein the hard segment of the thermoplastic polyester elastomer comprises polyethylene terephthalate, polybutylene terephthalate, or a combination thereof.

3. The method for producing a thermoplastic polyester elastomer yarn according to claim 1 , wherein the hard segments of the thermoplastic polyester elastomer are derived from recycled waste.

4. 2. The method for producing a thermoplastic polyester elastomer yarn according to claim 1, wherein the soft segment of the thermoplastic polyester elastomer comprises polyethylene glycol, polyether polyol, polytetramethylene ether glycol, or a combination thereof.

5. The method for producing thermoplastic polyester elastomer yarn according to claim 1, wherein the diameter of the sliver treatment zone is 0.4 mm to 3.0 mm.

6. The method for producing thermoplastic polyester elastomer yarn according to claim 1, wherein the distance between two adjacent sliver treatment zones is 0.05 mm to 3.0 mm.

7. 2. The method for producing thermoplastic polyester elastomer yarn according to claim 1, wherein the ratio of the diameter of the sliver processing zone to the distance between two adjacent sliver processing zones is 0.133 to 60.

8. the yarn gathering zone having a plurality of interconnecting connection segments; the number of said connection segments is equal to the number of said sliver processing zones; The method of claim 1 , wherein each of said connection segments communicates with one of said sliver treatment zones.

9. The method for producing thermoplastic polyester elastomer yarn according to claim 8, wherein the length of the connection segment is 0.1 mm to 0.3 mm.

10. The method for producing thermoplastic polyester elastomer yarn according to claim 8, wherein the width of the connection segment is 0.01 mm to 0.5 mm.

11. The method for producing thermoplastic polyester elastomer yarn according to claim 8, wherein the ratio of the diameter of the sliver treatment zone to the length of the connection segment is 0.133 to 30.

12. The method for producing thermoplastic polyester elastomer yarn according to claim 8, wherein the ratio of the diameter of the sliver treatment zone to the width of the connection segment is 0.8 to 300.

13. A thermoplastic polyester elastomer yarn produced by the production method according to any one of claims 1 to 12, wherein the thermoplastic polyester elastomer yarn is integrally molded, The thermoplastic polyester elastomer yarn has a plurality of sliver processed portions protruding outward, and has an outer radius and an inner radius, the outer radius is larger than the inner radius, and the ratio of the outer radius to the inner radius (outer radius / inner radius) is 1.2 to 5.

14. The thermoplastic polyester elastomer yarn according to claim 13, wherein the denier of the thermoplastic polyester elastomer yarn is 15 to 100.

15. The thermoplastic polyester elastomer yarn of claim 13, wherein the outer radius is between 40 μm and 170 μm.

16. The thermoplastic polyester elastomeric yarn of claim 13, wherein the inner radius is between 25 μm and 115 μm.

17. The thermoplastic polyester elastomer yarn according to claim 13, wherein the radius of curvature of the sliver processing portion is 10 μm to 45 μm.

Images