Thermoplastic polyester elastomer yarn and method for producing the same

Abstract

The present invention provides a thermoplastic polyester elastomer yarn and a method for making the same. [Solution] A method for producing a 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. A spinneret used in the melt spinning process is formed with a patterned nozzle, which includes a yarn combining zone and multiple sliver treatment zones, which are arranged symmetrically around the yarn combining zone, and each sliver treatment zone is connected to the yarn combining zone, and the number of sliver treatment zones is three or more.

Description

Technical Field

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

Background Art

[0002] Currently, most fibers are produced by dry spinning. In the process of dry spinning, a polymer is dissolved in a solvent to form a spinning solution. After the spinning solution is formed through an extruder and a die, it enters a heated gas, and the solvent in the spinning solution volatilizes due to high temperature to form polymer filaments. However, in the traditional dry spinning method, a large amount of solvent needs to be used during the process, resulting in many environmental problems.

[0003] In order to completely evaporate the solvent, the thickness of a single filament should not be too high, generally about 10 to 20 denier. To obtain yarns with a higher denier number, it is necessary to combine multiple yarns by thickening through friction or air pressurization to form a combined yarn. However, due to the influence of the bonding method, the appearance of each combined yarn is generally very different, and there are generally variations in quality.

[0004] When producing yarns by the method of melt spinning, yarns with a high denier number can be produced. However, in the process of weaving the yarns, due to the small contact area and insufficient frictional force, it may cause the yarns to slip off the cake and break.

[0005] Therefore, improving the manufacturing method to improve the quality of high-denier yarns and their subsequent processing conditions has become one of the important issues to be solved in this industry.

Summary of the Invention

Problems to be Solved by the Invention

[0006] The technical problem that this invention aims to solve is to provide 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 means employed by the present invention is to provide a method for producing thermoplastic polyester elastomer yarn. The method for producing thermoplastic polyester elastomer yarn includes providing a thermoplastic polyester elastomer and producing 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 has a patterned nozzle formed thereon, and the patterned nozzle includes a yarn matching zone and a plurality of sliver processing zones, the plurality of sliver processing zones are arranged symmetrically with respect to the yarn matching zone, each sliver processing zone is in communication with the yarn matching zone, and the number of sliver processing zones is three or more.

[0008] In one embodiment, the hard segment of the thermoplastic polyester elastomer includes 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 one embodiment, 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 processing zone is 0.4 mm to 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 a sliver processing zone to the distance between two adjacent sliver processing zones is between 0.133 and 60.

[0014] In one embodiment, the thread matching zone has a plurality of interconnecting segments, the number of which is the same as the number of sliver processing zones, and each interconnecting segment communicates with one of the sliver processing zones.

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

[0016] In one embodiment, the width of the connecting segment is 0.01 mm to 0.5 mm.

[0017] In one embodiment, the ratio of the diameter of the sliver processing zone to the length of the connecting segment is: 1.33 It is ~30.

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

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

[0020] To solve the above technical problems, another technical means adopted by the present invention is to provide a thermoplastic polyester elastomer yarn. The thermoplastic polyester elastomer yarn is manufactured by the above manufacturing method and is integrally formed. The thermoplastic polyester elastomer yarn has a plurality of sliver treatment portions protruding to the outside, and has an outer radius and an inner radius, the outer radius is larger than the inner radius, and the value of the ratio of the outer radius to the inner radius is 1.2 to 5.

[0021] In an embodiment, the denier number of the thermoplastic polyester elastomer yarn is 15 to 100.

[0022] In an embodiment, the outer radius is 40 μm to 170 μm.

[0023] In an embodiment, the inner radius is 25 μm to 115 μm.

Advantages 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 have 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 a plurality of sliver treatment zones", and "the plurality of sliver treatment zones are arranged symmetrically around the yarn combining zone, and each sliver treatment zone communicates with the yarn combining zone", so as to manufacture a thermoplastic polyester elastomer yarn with a high surface area and a high denier number.

Brief Description of the Drawings

[0025] [Figure 1] It is a three-dimensional schematic diagram of the spinneret of the present invention. [Figure 2] It is a schematic diagram of the patterned nozzle of the first embodiment in the manufacturing method of the thermoplastic polyester elastomer yarn of the present invention. [Figure 3]It is a schematic diagram of the thermoplastic polyester elastomer yarn of the present invention. [Figure 4] It is a schematic diagram of the patterned nozzle of the second embodiment of the method for producing the thermoplastic polyester elastomer yarn of the present invention. [Figure 5] It is a schematic diagram of the patterned nozzle of the third embodiment in the method for producing the thermoplastic polyester elastomer yarn of the present invention. [Figure 6] It is a schematic diagram of the patterned nozzle of Example 3 of the present invention. [Figure 7] It is a schematic diagram of the patterned nozzle of Comparative Example 1 of the present invention. [Figure 8] It is a schematic diagram of the patterned nozzle of Comparative Example 2 of the present invention. [Figure 9] It is a schematic diagram of the patterned nozzle of Comparative Example 3 of the present invention.

Embodiments for Carrying Out the Invention

[0026] In order to further deepen the understanding of the features and technical content of the present invention, please refer to the following detailed description of the present invention and the accompanying drawings. However, the provided accompanying drawings are only provided for reference and explanation, and do not limit the scope of the claims of the present invention.

[0027] The following describes how the "thermoplastic polyester elastomer yarn and method for producing the same" according to the present invention can be implemented by specific embodiments, and those skilled in the art will be able to understand the advantages and effects of the present invention based on the contents disclosed herein. The present invention can be implemented or applied by other different specific embodiments, and various modifications and changes can be made to each detail herein, based on different viewpoints and applications, as long as they do not deviate from the concept of the present invention. It should also be noted in advance that the accompanying drawings of the present invention are for simple schematic explanation and are not drawn to actual size. The following describes the technical content of the present invention in more detail based on embodiments, but the scope of protection of the present invention is not limited by the contents disclosed herein. The term "or" as used herein may include any one or more of the items listed in relation to the actual situation.

[0028] To solve the above problems, the present invention provides a thermoplastic polyester elastomer yarn and a method for producing the same, which produces a high denier yarn with uniform quality by selecting the material and designing the nozzle pattern.

[0029] In the present invention, yarn is manufactured by melt spinning, and the manufactured thermoplastic polyester elastomer yarn is integrally molded. Furthermore, there is no need to combine multiple yarns to form a bonded yarn through processes such as friction-induced thickening or air pressurization. Therefore, the method for manufacturing thermoplastic polyester elastomer yarn according to the present invention has the advantage of being simplified. In addition, because the thermoplastic polyester elastomer yarn of the present invention has an appropriate surface area, it has sufficient frictional force during the weaving process and is less likely to slip off the cake and break.

[0030] The method for producing thermoplastic polyester elastomer yarn according to the present invention includes the steps of providing a thermoplastic polyester elastomer (step S1) and producing 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 one preferred embodiment, the content of soft segments in the thermoplastic polyester elastomer is greater than the content of hard segments.

[0032] Specifically, the soft segment content in the thermoplastic polyester elastomer is greater than 50% by weight and less than or equal to 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 between 30% by weight and 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 one exemplary embodiment, the soft segment in the thermoplastic polyester elastomer may be formed from polyethylene glycol (PEG), polyether polyol (PPG), polytetramethylene ether glycol (PTMEG), or a combination thereof. The weight-average molecular weight of the monomers constituting the soft segment may be between 500 g / mol and 4000 g / mol, and may be any positive integer between 500 g / mol and 4000 g / mol, for example.

[0034] In one exemplary embodiment, the hard segment in the thermoplastic polyester elastomer may be formed from polyethylene terephthalate, polybutylene terephthalate, or a combination thereof, but the present invention is not limited thereto. In another exemplary embodiment, the hard segment in the thermoplastic polyester elastomer may be derived from recycled waste. Specifically, the hard segment in the thermoplastic polyester elastomer may be a 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 between 1.1 dL / g and 1.6 dL / g. For example, it may be 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 the range of intrinsic viscosity, the thermoplastic polyester elastomer is particularly suitable for the production of the high-denier thermoplastic polyester elastomer yarn of the present invention.

[0036] In step S2, the melt spinning process involves supplying thermoplastic polyester elastomer particles to the feed tank of a melt spinning machine, transferring the thermoplastic polyester elastomer particles to a heating area via a screw, and heating the thermoplastic polyester elastomer particles at a temperature of 190°C to 270°C to form 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 from a spinning nozzle at a spinning temperature of 200°C to 270°C, cooled with cold air, coated with oil, and then wound up at a winding speed of 500m / min to 2000m / min to obtain thermoplastic polyester elastomer yarn.

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

[0038] In the present invention, the design includes a patterned nozzle 1 in the spinneret Z, a plurality of sliver processing zones 10, and a yarn matching zone 20, wherein the plurality of sliver processing zones 10 are arranged symmetrically with respect to the yarn matching zone 20, and each sliver processing zone 10 is in communication with the yarn matching zone 20.

[0039] In the first embodiment (structure shown in Figure 2), the patterned nozzle 1 includes four sliver processing zones 10, which are arranged symmetrically around a thread matching zone 20. The thread matching zone 20 includes interconnecting segments 21, and the multiple interconnecting segments 21 exhibit a radially symmetrical distribution. Specifically, the number of interconnecting segments 21 is the same as the number of sliver processing zones 10; that is, the thread matching zone 20 includes four interconnecting segments 21. Furthermore, each interconnecting segment 21 communicates with one of the sliver processing zones 10.

[0040] What needs to be explained is that immediately after the pressurized molten thermoplastic polyester elastomer passes through the patterned nozzle 1, it has a shape corresponding to the patterned nozzle 1. After leaving the patterned nozzle 1, the external pressure decreases, and the thermoplastic polyester elastomer expands, balancing the pressure inside and outside the material. Therefore, although the external shape of the thermoplastic polyester elastomer yarn cannot be said to be completely identical to the shape of the patterned nozzle 1, it can be partially identical.

[0041] To elaborate further, given the original shape of the patterned nozzle, the thermoplastic polyester elastomer yarn theoretically has arcuate surfaces with angles exceeding 270° (sliver processing zone 10). However, due to the effects of expansion, the actual thermoplastic polyester elastomer yarn may only maintain arcuate surfaces with angles less than 200°. The arcuate portions in the thermoplastic polyester elastomer yarn can increase the surface area of ​​the yarn, improving the frictional force between the yarns in subsequent processes.

[0042] With the above design, after the thermoplastic polyester elastomer passes through multiple sliver processing zones 10, each expands to form a structure (sliver processing section) that approximates a single filament. After passing through the filament joining zone 20, the thermoplastic polyester elastomer expands to communicate with the multiple sliver processing sections, and the inside 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, so that by going through steps S1 and S2, a structure similar to a structure made of four threads joined together can be obtained.

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

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

[0046] Furthermore, as shown in Figure 2, in the design of the size of the patterned nozzle 1, the sliver processing zone 10 may be circular or have other geometric shapes. If 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. If the sliver processing zone 10 has other geometric shapes, 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 between 0.05 mm and 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 connecting segment 21 may be 0.1 mm to 0.3 mm. For example, the length L of the connecting segment 21 may be 0.15 mm, 0.2 mm, or 0.25 mm. The width z of the connecting segment 21 may be 0.01 mm to 0.5 mm. For example, the width z of the connecting 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, because the thermoplastic polyester elastomer yarn has a large surface area, the ratio of the diameter x of the sliver-treated zone 10 to the length L of the connecting segment 21 may be controlled to a range of 1.33 to 30. For example, the ratio of the diameter x of the sliver-treated zone 10 to the length L of the connecting segment 21 is any positive number between 1.33 and 30, and it should be noted that any positive integer within this range is included in the scope of this application.

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

[0051] In yet another embodiment, the ratio of the diameter x of the sliver processing zone 10 to the distance y between two adjacent sliver processing zones 10 is between 0.133 and 60. 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 60.

[0052] Furthermore, as shown in Figure 3, in the structure of a thermoplastic polyester elastomer yarn, 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 a model 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 of the outer radius r1 to the inner radius r2 is between 1.2 and 5. For example, the ratio of the outer radius r1 to the inner radius r2 may be 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, or 4.5.

[0055] As shown in Figure 4, the patterned nozzle 1 of the second embodiment of the present invention includes three sliver processing zones 10, which are arranged symmetrically around a thread joining zone 20. The thread joining zone 20 includes three radially symmetrically distributed and interconnected connecting segments 21, each connecting segment 21 communicating with one of the sliver processing zones 10. In this way, the patterned nozzle 1 of the second embodiment can be used to manufacture a structure similar to that of three threads joined together.

[0056] In the second embodiment, the diameter x of the sliver processing zone 10, the length L of the connecting segment 21, and the width z of the connecting segment 21 are similar to those in the first embodiment and will not be described again here. Notably, the distance y between two adjacent sliver processing zones 10 may be between 0.5 mm and 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 exemplary embodiments, because the thermoplastic polyester elastomer yarn has a large surface area, the ratio of the diameter x of the sliver-treated zone 10 to the distance y between two adjacent sliver-treated zones 10 may be further controlled to be between 0.133 and 6. For example, the ratio of the diameter x of the sliver-treated zone 10 to the distance y between two adjacent sliver-treated zones 10 may be any positive integer between 0.133 and 6.

[0058] As shown in Figure 5, the patterned nozzle 1 of the third embodiment of the present invention includes five sliver processing zones 10, which are arranged symmetrically around a yarn joining zone 20. The yarn joining zone 20 includes five radially symmetrically distributed and interconnected connecting segments 21, each connecting segment 21 communicating with one of the sliver processing zones 10. In this way, the patterned nozzle 1 of the third embodiment can be used to manufacture a structure similar to that of five yarns joined together.

[0059] In the third embodiment, the diameter x of the sliver processing zone 10, the length L of the connecting segment 21, and the width z of the connecting segment 21 are similar to those in the first embodiment and will not be described again here. Notably, the distance y between two adjacent sliver processing zones 10 may be between 0.05 mm and 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 exemplary embodiments, because the thermoplastic polyester elastomer yarn has a large surface area, the ratio of the diameter x of the sliver-treated zone 10 to the distance y between two adjacent sliver-treated zones 10 may be further controlled to a positive number between 0.2 and 60. For example, the ratio of the diameter x of the sliver-treated zone 10 to the distance y between two adjacent sliver-treated zones 10 may be any positive number between 0.2 and 6. [Examples]

[0061] [Experimental data] To demonstrate that the manufacturing method of the present invention can produce thermoplastic polyester elastomer yarns with a high denier count that are less likely to slip in subsequent processes, a commercially available thermoplastic polyester elastomer (product number Hytrel® 4056) is used as a raw material. After heating and melting, it is extruded in a fixed amount from a spinning nozzle at a spinning temperature of 190°C to 260°C to produce the thermoplastic polyester elastomer yarns according to Examples 1 to 3 and Comparative Examples 1 to 3.

[0062] The difference between Examples 1-3 and Comparative Examples 1-3 is that the spinneret has a different patterned nozzle. The patterned nozzle of the spinneret in Example 1 includes four sliver processing zones, as shown in Figure 2 (First Embodiment). The patterned nozzle of the spinneret in Example 2 includes three sliver processing zones, as shown in Figure 4 (Second Embodiment). The patterned nozzle of the spinneret in Example 3 includes four sliver processing zones, as shown in Figure 6, and the diameter of the sliver processing zones and the width of the connecting segments were the same. The patterned nozzle of the spinneret in Comparative Example 1 includes two sliver processing zones, as shown in Figure 7. The patterned nozzle of the spinneret in Comparative Example 2 includes two sliver processing zones, as shown in Figure 8, and the diameter of the sliver processing zones and the width of the connecting segments were the same. The patterned nozzle of the spinneret in Comparative Example 3 is circular, as shown in Figure 9; that is, the patterned nozzle in Comparative Example 3 does not have a distinction between the so-called sliver processing zone and the yarn matching zone.

[0063] The thermoplastic polyester elastomer yarns of Examples 1-3 and Comparative Examples 1-3 have similar yarn strengths. The strength of the thermoplastic polyester elastomer yarns was measured using an automated tensile testing machine (model number STATIMAT 4) manufactured by Textechno, according to the standard measurement method of ASTM D 885. The specific yarn strengths are shown in Table 1. Furthermore, the elongation of the thermoplastic polyester elastomer yarns was measured using an automated tensile testing machine according to the standard measurement method of ASTM D 885, and the yarn elongation is shown in Table 1.

[0064] To measure whether thermoplastic polyester elastomer yarn is prone to slipping during subsequent processes, 500g of thermoplastic polyester elastomer yarn was woven on a circular knitting machine using 128 axes. The number of times the thermoplastic polyester elastomer yarn slipped during a single weaving cycle was counted, and the average value was used as the measurement. The average number of slippages 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 processing zones, the thermoplastic polyester elastomer yarn has a relatively large surface area, and in subsequent processes, it does not slip off due to insufficient friction, which would interrupt the manufacturing process.

[0067] [Advantageous effects of the embodiment] 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 thermoplastic polyester elastomer yarn with a high surface area and high denier count 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 joining zone and a plurality of sliver processing zones", and "the plurality of sliver processing zones are arranged symmetrically around the yarn joining zone, and each sliver processing zone is in communication with the yarn joining zone".

[0068] The information disclosed above represents only preferred and implementable embodiments of the present invention, and the claims of the present invention are not limited thereto. Therefore, any equivalent technical modifications made using the description and drawings of the present invention are all included within the scope of the claims of the present invention. [Explanation of symbols]

[0069] Z... Spinner nozzle 1...Patterned nozzle 10...Sliver processing zone 20...Thread matching zone 21...Connection Segment 3... Thermoplastic polyester elastomer yarn 30...Sliver processing unit 31... Circular 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 is provided, comprising 50% to 70% by weight of a soft segment and 30% 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. A method for producing thermoplastic polyester elastomer yarn, comprising: producing thermoplastic polyester elastomer yarn by performing a melt spinning process using the thermoplastic polyester elastomer; The spinneret used in the melt spinning process has a patterned nozzle, the patterned nozzle includes a yarn joining zone and a plurality of sliver processing zones, the plurality of sliver processing zones are arranged symmetrically with respect to the yarn joining zone, each of the sliver processing zones is in communication with the yarn joining zone, and the number of sliver processing zones is three or more. The ratio of the diameter of the sliver processing zone to the distance between two adjacent sliver processing zones is between 0.133 and 6. The thread joining zone has a plurality of interconnecting segments that communicate with each other, The number of connection segments is the same as the number of sliver processing zones. Each of the aforementioned connecting segments communicates with one of the sliver processing zones, and the ratio of the diameter of the sliver processing zone to the length of the connecting segment is between 1.33 and 30. A method for producing thermoplastic polyester elastomer yarn, characterized by the above.

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 thermoplastic polyester elastomer yarn according to claim 1, wherein the hard segment of the thermoplastic polyester elastomer is derived from recycled waste.

4. 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 processing zone is 0.4 mm to 3.0 mm.

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

7. The method for producing thermoplastic polyester elastomer yarn according to claim 1, wherein the length of the connecting segment is 0.1 mm to 0.3 mm.

8. The method for producing thermoplastic polyester elastomer yarn according to claim 1, wherein the width of the connecting segment is 0.01 mm to 0.5 mm.

9. 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 width of the connecting segment is 0.8 to 300.

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