Thermoplastic polyester elastomer yarn and method for producing same

Abstract

The invention discloses a thermoplastic polyester elastomer yarn and a manufacturing method thereof. The manufacturing method of the thermoplastic polyester elastomer yarn comprises the following steps: providing a thermoplastic polyester elastomer; and performing a melt spinning procedure using a thermoplastic polyester elastomer to produce the thermoplastic polyester elastomer yarn. The thermoplastic polyester elastomer comprises 50 to 70 weight percent of soft segments and 30 to 50 weight percent of hard segments, and the intrinsic viscosity of the thermoplastic polyester elastomer is 1.1 to 1.6 dl / g. Patterned spraying holes are formed in a spinneret plate used in the melt spinning procedure, each patterned spraying hole comprises a doubling area and a plurality of imitated yarn areas, the imitated yarn areas are symmetrically distributed with the doubling area as the center, each imitated yarn area is communicated with the doubling area, and the number of the imitated yarn areas is larger than or equal to three. According to the thermoplastic polyester elastomer yarn and the manufacturing method thereof, the thermoplastic polyester elastomer yarn with high surface area and high denier number can be manufactured.

Description

TECHNICAL FIELD

[0001] The present application relates to a thermoplastic polyester elastomer yarn and a manufacturing method thereof, in particular, to a high denier thermoplastic polyester elastomer yarn and a manufacturing method thereof. BACKGROUND

[0002] Currently, most of the fibers are produced by dry spinning. In the process of dry spinning, the polymer is dissolved by solvent to form a spinning solution. After the spinning solution is formed by the extruder and the die, it enters the heated gas. The solvent in the spinning solution volatilizes due to high temperature, and the polymer filament is formed. However, the traditional dry spinning method needs to use a large amount of solvent in the process, which raises environmental concerns.

[0003] In order to make the solvent volatilize completely, the thickness of the single yarn cannot be too high, and the thickness of the single yarn is generally about 10 denier to 20 denier (denier, den, denier). If a higher denier yarn is required, a plurality of yarns need to be combined to form a multi-yarn by rubbing and sticking or air pressure. However, due to the influence of the sticking method, each multi-yarn has a great difference in appearance, so the multi-yarn usually has the problem of uneven quality.

[0004] If the yarn is produced by melting spinning, a higher denier yarn can be manufactured, but the yarn will slip off the cake during weaving due to small contact area and insufficient friction, resulting in the problem of breakage.

[0005] Therefore, how to improve the quality of high denier yarn and improve the subsequent processing conditions by improving the manufacturing method has become one of the important problems to be solved in this industry. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a thermoplastic polyester elastomer yarn and a manufacturing method thereof to overcome the shortcomings of the prior art.

[0007] To address the aforementioned technical problems, one technical solution adopted by the present invention is to provide a method for manufacturing thermoplastic polyester elastomer yarn. The method for manufacturing thermoplastic polyester elastomer yarn includes: providing a thermoplastic polyester elastomer; and performing a melt spinning process using the thermoplastic polyester elastomer to obtain thermoplastic polyester elastomer yarn. The thermoplastic polyester elastomer comprises 50 to 70% by weight of soft segments and 30 to 50% by weight of hard segments, and the intrinsic viscosity of the thermoplastic polyester elastomer is 1.1 dL / g to 1.6 dL / g. Patterned nozzles are generated on the spinneret used in the melt spinning process. The patterned nozzles include a doubling zone and multiple yarn-simulating zones, which are symmetrically distributed around the doubling zone, and each yarn-simulating zone is connected to the doubling zone. The number of yarn-simulating zones is greater than or equal to three.

[0008] Furthermore, the hard segments of the thermoplastic polyester elastomer include polyethylene terephthalate, polybutylene terephthalate, or combinations thereof.

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

[0010] Furthermore, the soft segments of thermoplastic polyester elastomers include polyethylene glycol, polyether polyol, polytetramethylene ether glycol, or combinations thereof.

[0011] Furthermore, the diameter of the simulated yarn area is 0.4 mm to 3.0 mm.

[0012] Furthermore, the spacing between two adjacent yarn-like areas is 0.05 mm to 3.0 mm.

[0013] Furthermore, the ratio of the diameter of the simulated yarn area to the distance between two adjacent simulated yarn areas is 0.133 to 60.

[0014] Furthermore, the yarn-doping zone has multiple interconnected connecting segments, the number of which is the same as the number of yarn-doping zones, with each connecting segment connected to one of the yarn-doping zones.

[0015] Furthermore, the length of the connecting segment is 0.1 mm to 0.3 mm.

[0016] Furthermore, the width of the connecting segment is 0.01 mm to 0.5 mm.

[0017] Furthermore, the ratio of the diameter of the simulated yarn area to the length of the connecting section is 1.33 to 30.

[0018] Furthermore, the ratio of the diameter of the simulated yarn area to the width of the connecting section is 0.8 to 300.

[0019] Furthermore, the radius of curvature of the yarn-like part is 10 micrometers to 45 micrometers.

[0020] To address the aforementioned technical problems, another technical solution adopted by the present invention is to provide a thermoplastic polyester elastomer yarn. The thermoplastic polyester elastomer yarn is manufactured by the aforementioned manufacturing method and is integrally formed. The thermoplastic polyester elastomer yarn has multiple outwardly protruding yarn-like portions, and has an outer radius and an inner radius, with the outer radius being larger than the inner radius, and the ratio of the outer radius to the inner radius being 1.2 to 5.

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

[0022] Furthermore, the outer radius ranges from 40 micrometers to 170 micrometers.

[0023] Furthermore, the inner radius ranges from 25 micrometers to 115 micrometers.

[0024] One of the beneficial effects of the present invention is that the thermoplastic polyester elastomer yarn and its manufacturing method provided by the present invention can produce thermoplastic polyester elastomer yarn with high surface area and high denier number by means of the technical solutions of "the intrinsic viscosity of the thermoplastic polyester elastomer is 1.1 dL / g to 1.6 dL / g", "the patterned nozzle includes a doubling area and multiple simulated yarn areas" and "the multiple simulated yarn areas are symmetrically distributed around the doubling area, and each simulated yarn area is connected to the doubling area".

[0025] To further understand the features and technical content of the present invention, please refer to the following detailed description and accompanying drawings. However, the drawings provided are for reference and illustration only and are not intended to limit the present invention. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the spinneret of the present invention.

[0027] Figure 2 This is a schematic diagram of the patterned nozzles in the first embodiment of the method for manufacturing thermoplastic polyester elastomer yarn of the present invention.

[0028] Figure 3 This is a schematic diagram of the thermoplastic polyester elastomer yarn of the present invention.

[0029] Figure 4 This is a schematic diagram of the patterned nozzles in the second embodiment of the method for manufacturing thermoplastic polyester elastomer yarn of the present invention.

[0030] Figure 5 This is a schematic diagram of the patterned nozzles in the third embodiment of the method for manufacturing thermoplastic polyester elastomer yarn of the present invention.

[0031] Figure 6This is a schematic diagram of the patterned nozzles in Embodiment 3 of the present invention.

[0032] Figure 7 This is a schematic diagram of the patterned nozzles in Comparative Example 1 of the present invention.

[0033] Figure 8 This is a schematic diagram of the patterned nozzles in Comparative Example 2 of the present invention.

[0034] Figure 9 This is a schematic diagram of the patterned nozzles in Comparative Example 3 of the present invention.

[0035] Reference numerals: Z: spinneret; 1: patterned nozzle; 10: yarn imitation area; 20: yarn doubling area; 21: connecting section; 3: thermoplastic polyester elastomer yarn; 30: yarn imitation part; 31: arc surface; x: diameter; y: spacing; z: width; L: length; r1: outer radius; r2: inner radius. Detailed Implementation

[0036] The following specific embodiments illustrate the implementation of the "thermoplastic polyester elastomer yarn and its manufacturing method" disclosed in this invention. Those skilled in the art can understand the advantages and effects of this invention from the content disclosed in this specification. This invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this invention. Furthermore, the accompanying drawings of this invention are for simple illustrative purposes only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this invention in detail, but the disclosed content is not intended to limit the scope of protection of this invention. In addition, the term "or" used herein should be interpreted to include, depending on the actual situation, any combination of any one or more of the associated listed items.

[0037] To address the aforementioned problems, this invention provides a thermoplastic polyester elastomer yarn and its manufacturing method, which produces high-denier yarn with uniform quality through material selection and patterned nozzle design.

[0038] This invention utilizes melt spinning to produce yarn, resulting in a one-piece thermoplastic polyester elastomer yarn that eliminates the need for additional steps of friction bonding or air pressurization to combine multiple yarns into a ply. Therefore, the manufacturing method of this invention for thermoplastic polyester elastomer yarn is significantly simpler. Furthermore, the thermoplastic polyester elastomer yarn of this invention has an appropriate surface area, providing sufficient friction during weaving and preventing breakage due to slippage from the yarn cake.

[0039] The method for manufacturing thermoplastic polyester elastomer yarn of the present invention includes the following steps: providing a thermoplastic polyester elastomer (step S1); performing a melt spinning process using the thermoplastic polyester elastomer to obtain thermoplastic polyester elastomer yarn (step S2).

[0040] In step S1, the selected thermoplastic polyester elastomer comprises 50 to 70 percent by weight of soft segments and 30 to 50 percent by weight of hard segments. In an optional embodiment, the content of soft segments in the thermoplastic polyester elastomer is higher than the content of hard segments.

[0041] In other words, the content of soft segments in thermoplastic polyester elastomers is greater than 50% to 70% by weight, for example, the content of soft segments is a positive integer between 50% and 70% by weight. The content of hard segments in thermoplastic polyester elastomers is 30% to less than 50% by weight, for example, the content of hard segments is a positive integer between 30% and less than 50% by weight.

[0042] In exemplary embodiments, the soft segments in the thermoplastic polyester elastomer may be generated from polyethylene glycol (PEG), polyether polyol (PPG), polytetramethylene ether glycol (PTMEG), or combinations thereof. The weight-average molecular weight of the monomers constituting the soft segments may be from 500 g / mol to 4000 g / mol, for example, a positive integer between 500 g / mol and 4000 g / mol.

[0043] In an exemplary embodiment, the hard segments in the thermoplastic polyester elastomer may be generated from polyethylene terephthalate, polybutylene terephthalate, or combinations thereof, but the invention is not limited thereto. In another exemplary embodiment, the hard segments in the thermoplastic polyester elastomer may be derived from recycled waste. Specifically, the hard segments in the thermoplastic polyester elastomer may be recycled thermoplastic polyester elastomer (rTPEE) obtained by depolymerization of PET waste such as PET bottles.

[0044] The intrinsic viscosity of the thermoplastic polyester elastomer can be from 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 the above intrinsic viscosity range, the thermoplastic polyester elastomer is particularly suitable for manufacturing the high denier thermoplastic polyester elastomer yarn of the present invention.

[0045] In step S2, the melt spinning process involves feeding thermoplastic polyester elastomer granules into the feed trough of a melt spinning machine. The granules are conveyed to the heating zone via a screw and heated at a temperature of 190°C to 270°C to generate molten thermoplastic polyester elastomer. The molten thermoplastic polyester elastomer is then passed through a screening device and conveyed to the spinning box via a feed pipe. At a spinning temperature of 200°C to 270°C, it is quantitatively extruded through a spinning nozzle, cooled by cold air, and oiled before being wound at a take-up speed of 500 m / min to 2000 m / min to obtain thermoplastic polyester elastomer yarn.

[0046] Please refer to both together. Figure 1 and Figure 2 As shown, in the spinning box, the pressurized molten thermoplastic polyester elastomer is ejected through the patterned nozzles 1 on the spinneret Z, and after cooling, thermoplastic polyester elastomer yarn can be obtained.

[0047] In this invention, the patterned nozzles 1 on the spinneret Z are designed to have multiple yarn-simulating areas 10 and a yarn-combining area 20. The multiple yarn-simulating areas 10 are symmetrically distributed around the yarn-combining area 20, and each yarn-simulating area 10 is connected to the yarn-combining area 20.

[0048] In the first embodiment ( Figure 2 (As shown in the structure), the patterned nozzle 1 has four yarn-simulating areas 10, which are symmetrically distributed around the yarn-combining area 20. The yarn-combining area 20 has multiple interconnected connecting segments 21, which are radially symmetrically distributed. Specifically, the number of connecting segments 21 is the same as the number of yarn-simulating areas 10, that is, the yarn-combining area 20 has four connecting segments 21. Furthermore, each connecting segment 21 is connected to one of the yarn-simulating areas 10.

[0049] It should be noted that the pressurized molten thermoplastic polyester elastomer has a shape corresponding to the patterned nozzle 1 when it first passes through the nozzle. After leaving the nozzle, the thermoplastic polyester elastomer expands due to the decrease in external pressure, bringing the internal and external pressures of the material into equilibrium. Therefore, the shape of the thermoplastic polyester elastomer yarn is not exactly the same as the shape of the patterned nozzle, but there are still some correspondences.

[0050] To further explain, theoretically, the thermoplastic polyester elastomer yarn should have an arc surface with an angle greater than 270 degrees (pseudo-yarn area 10) in terms of the original shape of the patterned nozzles. However, due to expansion, the actual thermoplastic polyester elastomer yarn may only retain an arc surface with an angle less than 200 degrees. The arc-shaped portion on the thermoplastic polyester elastomer yarn can increase the surface area of ​​the thermoplastic polyester elastomer yarn, thereby increasing the friction between the thermoplastic polyester elastomer yarn and its surroundings in subsequent processes.

[0051] According to the above design, after passing through multiple yarn-like zones 10, the thermoplastic polyester elastomer expands to form a structure similar to a single yarn (yarn-like portion). After passing through the yarn-doping zone 20, the thermoplastic polyester elastomer expands to connect multiple yarn-like portions, making the interior of the thermoplastic polyester elastomer yarn solid. Therefore, the thermoplastic polyester elastomer yarn of the present invention is integrally formed and has a solid structure.

[0052] In the first embodiment, the patterned nozzle has four yarn-like areas 10. Therefore, after the above steps S1 and S2, a structure similar to that of four yarns combined can be obtained.

[0053] Please see Figure 3 As shown, in the cross-section of the thermoplastic polyester elastomer yarn 3, the thermoplastic polyester elastomer yarn 3 has four outwardly protruding yarn-like portions 30, each yarn-like portion 30 having an arc surface 31, which increases the surface area of ​​the thermoplastic polyester elastomer yarn 3. As mentioned above, the yarn-like portions 30 are mainly formed by the thermoplastic polyester elastomer passing through the yarn-like region 10.

[0054] The radius of curvature of the simulated yarn portion 30 can be measured based on the arc surface 31 of the thermoplastic polyester elastomer yarn 3. In the exemplary embodiment, the radius of curvature of the simulated yarn portion 30 is between 10 micrometers and 45 micrometers, for example, the radius of curvature of the simulated yarn portion 30 can be a positive integer between 10 micrometers and 45 micrometers.

[0055] Please refer to the following: Figure 2 As shown, in the dimensional design of the patterned nozzle 1, the simulated yarn area 10 can be circular or other geometric shapes. When the simulated yarn area 10 is circular, its diameter x can be from 0.4 mm to 3.0 mm. For example, the diameter x of the simulated yarn area 10 can 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 simulated yarn area 10 is other geometric shapes, the major axis of the geometric shape is from 0.4 mm to 3.0 mm.

[0056] The spacing y between two adjacent simulated yarn areas 10 can be from 0.05 mm to 3.0 mm. For example, the spacing y between two adjacent simulated yarn areas 10 can 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.

[0057] The length L of the connecting segment 21 can be from 0.1 mm to 0.3 mm. For example, the length L of the connecting segment 21 can be 0.15 mm, 0.2 mm, or 0.25 mm. The width z of the connecting segment 21 can be from 0.01 mm to 0.5 mm. For example, the width z of the connecting segment 21 can 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.

[0058] In an exemplary embodiment, to allow the thermoplastic polyester elastomer yarn to have a large surface area, the ratio of the diameter x of the simulated yarn region 10 to the length L of the connecting segment 21 can be further controlled to be between 1.33 and 30. For example, the ratio of the diameter x of the simulated yarn region 10 to the length L of the connecting segment 21 can be a positive integer between 1.33 and 30.

[0059] In other embodiments, the ratio of the diameter x of the simulated yarn area 10 to the width z of the connecting segment can be further controlled to be between 0.8 and 300. For example, the ratio of the diameter x of the simulated yarn area 10 to the width z of the connecting segment can be a positive integer between 0.8 and 300.

[0060] In other embodiments, the ratio of the diameter x of the simulated yarn area 10 to the distance y between two adjacent simulated yarn areas 10 can be further controlled to be between 0.133 and 60. For example, the ratio of the diameter x of the simulated yarn area 10 to the distance y between two adjacent simulated yarn areas 10 can be a positive integer between 0.133 and 60.

[0061] Please refer to the following: Figure 3 As shown, in the structure of thermoplastic polyester elastomer yarn, the cross-section of the thermoplastic polyester elastomer yarn has an outer radius r1 and an inner radius r2. The outer radius r1 refers to the maximum distance from the center of the thermoplastic polyester elastomer yarn to its outer edge, and the inner radius r2 refers to the minimum distance from the center of the thermoplastic polyester elastomer yarn to its outer edge. Therefore, the outer radius r1 is greater than the inner radius r2.

[0062] In the exemplary embodiment, the outer radius r1 is from 40 micrometers to 170 micrometers, and the inner radius r2 is from 25 micrometers to 115 micrometers. For example, the outer radius r1 can be a positive integer between 40 micrometers and 170 micrometers, and the inner radius r2 can be a positive integer between 25 micrometers and 115 micrometers.

[0063] Since the outer radius r1 is greater 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 can be 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, or 4.5.

[0064] Please see Figure 4As shown, the patterned nozzle 1 of the second embodiment of the present invention has three yarn-simulating areas 10, which are symmetrically distributed around the yarn-combining area 20. The yarn-combining area 20 has three radially symmetrically distributed and interconnected connecting segments 21, each connecting segment 21 being connected to one of the yarn-simulating areas 10. In this way, a structure similar to that of three yarns combined can be obtained through the patterned nozzle 1 of the second embodiment.

[0065] In the second embodiment, the diameter x of the simulated yarn area 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 therefore will not be described again here. It should be noted that the spacing y between two adjacent simulated yarn areas 10 can be from 0.5 mm to 3.0 mm. For example, the spacing y between two adjacent simulated yarn areas 10 can 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.

[0066] In an exemplary embodiment, to give the thermoplastic polyester elastomer yarn a larger surface area, the ratio of the diameter x of the simulated yarn region 10 to the distance y between two adjacent simulated yarn regions 10 can be further controlled to be between 0.133 and 6. For example, the ratio of the diameter x of the simulated yarn region 10 to the distance y between two adjacent simulated yarn regions 10 can be a positive integer between 0.133 and 6.

[0067] Please see Figure 5 As shown, the patterned nozzle 1 of the third embodiment of the present invention has five yarn-simulating areas 10, which are symmetrically distributed around the yarn-combining area 20. The yarn-combining area 20 has five radially symmetrically distributed and interconnected connecting segments 21, each connecting segment 21 being connected to one of the yarn-simulating areas 10. In this way, a structure similar to that of five yarns combined can be obtained through the patterned nozzle 1 of the third embodiment.

[0068] In the third embodiment, the diameter x of the simulated yarn area 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 therefore will not be described again here. It should be noted that the spacing y between two adjacent simulated yarn areas 10 can be from 0.05 mm to 2.0 mm. For example, the spacing y between two adjacent simulated yarn areas 10 can 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.

[0069] In an exemplary embodiment, to give the thermoplastic polyester elastomer yarn a larger surface area, the ratio of the diameter x of the simulated yarn region 10 to the distance y between two adjacent simulated yarn regions 10 can be further controlled to be between 0.2 and 60. For example, the ratio of the diameter x of the simulated yarn region 10 to the distance y between two adjacent simulated yarn regions 10 can be a positive integer between 0.2 and 6.

[0070] [Experimental Data]

[0071] To demonstrate that the manufacturing method of the present invention can produce high-denier thermoplastic polyester elastomer yarn that is not prone to slippage in subsequent processes, a commercially available thermoplastic polyester elastomer (model number: [model number missing]) was used. Using 4056 as raw material, after heating and melting, the thermoplastic polyester elastomer yarns of Examples 1 to 3 and Comparative Examples 1 to 3 are obtained by quantitative extrusion through a spinning nozzle at a spinning temperature of 190°C to 260°C.

[0072] The difference between Examples 1 to 3 and Comparative Examples 1 to 3 lies in the different patterned nozzles on the spinneret. The patterned nozzles of the spinneret in Example 1 are as follows: Figure 2 As shown in the first embodiment, the patterned nozzle has four yarn-like zones. The patterned nozzle of the spinneret in Embodiment 2 is as follows... Figure 4 As shown in the second embodiment, the patterned nozzle has three yarn-like zones. The patterned nozzle of the spinneret in Embodiment 3 is as follows: Figure 6 As shown, the patterned nozzle has four yarn-like zones, and the diameter of each zone is the same as the width of the connecting section. The patterned nozzle of the spinneret in Comparative Example 1 is as follows: Figure 7 As shown, the patterned nozzle has two yarn-like regions. The patterned nozzle of the spinneret in Comparative Example 2 is as follows: Figure 8 As shown, the patterned nozzle has two yarn-like regions, and the diameter of the yarn-like regions is the same as the width of the connecting section. The patterned nozzle of the spinneret in Comparative Example 3 is shown below. Figure 9 As shown, the patterned nozzles are circular, meaning that the patterned nozzles in Comparative Example 3 do not distinguish between the simulated yarn area and the doubling yarn area.

[0073] The thermoplastic polyester elastomer yarns of Examples 1 to 3 and Comparative Examples 1 to 3 have similar yarn strengths. The yarn strengths of the thermoplastic polyester elastomer yarns were measured using an automatic tensile testing instrument, model STATIMAT 4, manufactured by Textechno, according to the ASTM D 885 standard test method. The specific yarn strengths are listed in Table 1. The elongation of the thermoplastic polyester elastomer yarns was also measured using the automatic tensile testing instrument according to the ASTM D885 standard test method, and the results are listed in Table 1.

[0074] To test whether thermoplastic polyester elastomer yarn is prone to slippage in subsequent processes, 128 yarns, each weighing 500 grams, were woven on a circular knitting machine. The number of slippages of the thermoplastic polyester elastomer yarn in a single weaving cycle was counted and averaged. The average number of slippages is listed in Table 1.

[0075] Table 1

[0076]

[0077]

[0078] The results in Table 1 show that when the patterned nozzles have three or more simulated yarn areas, the thermoplastic polyester elastomer yarn can have a large surface area and will not easily slip off due to insufficient friction in subsequent processes, thus preventing production interruptions.

[0079] [Beneficial Effects of the Examples]

[0080] One of the beneficial effects of the present invention is that the thermoplastic polyester elastomer yarn and its manufacturing method provided by the present invention can produce thermoplastic polyester elastomer yarn with high surface area and high denier number by means of the technical solutions of "the intrinsic viscosity of the thermoplastic polyester elastomer is 1.1 dL / g to 1.6 dL / g", "the patterned nozzle includes a doubling area and multiple simulated yarn areas" and "the multiple simulated yarn areas are symmetrically distributed around the doubling area, and each simulated yarn area is connected to the doubling area".

[0081] The content disclosed above is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of protection of the claims of the present invention. Therefore, all equivalent technical changes made based on the content of the present invention specification and drawings are included within the scope of protection of the claims of the present invention.

Claims

1. A method for manufacturing thermoplastic polyester elastomer yarn, characterized in that, The method for manufacturing the thermoplastic polyester elastomer yarn includes: A thermoplastic polyester elastomer is provided, comprising 50 to 70 wt% soft segments and 30 to 50 wt% hard segments, wherein the intrinsic viscosity of the thermoplastic polyester elastomer is 1.1 dL / g to 1.6 dL / g; and The thermoplastic polyester elastomer is used in a melt spinning process to produce thermoplastic polyester elastomer yarn. Patterned nozzles are generated on the spinneret used in the melt spinning process. The patterned nozzles include a doubling zone and a plurality of simulated yarn zones. The plurality of simulated yarn zones are symmetrically distributed around the doubling zone. Each simulated yarn zone is connected to the doubling zone. The number of simulated yarn zones is greater than or equal to three.

2. The method for manufacturing thermoplastic polyester elastomer yarn according to claim 1, characterized in that, The hard segments of the thermoplastic polyester elastomer include polyethylene terephthalate, polybutylene terephthalate, or combinations thereof.

3. The method for manufacturing thermoplastic polyester elastomer yarn according to claim 1, characterized in that, The hard segments of the thermoplastic polyester elastomer are derived from recycled waste.

4. The method for manufacturing thermoplastic polyester elastomer yarn according to claim 1, characterized in that, The soft segments of the thermoplastic polyester elastomer include polyethylene glycol, polyether polyol, polytetramethylene ether glycol, or combinations thereof.

5. The method for manufacturing thermoplastic polyester elastomer yarn according to claim 1, characterized in that, The diameter of the simulated yarn area is 0.4 mm to 3.0 mm.

6. The method for manufacturing thermoplastic polyester elastomer yarn according to claim 1, characterized in that, The distance between two adjacent yarn-like areas is 0.05 mm to 3.0 mm.

7. The method for manufacturing thermoplastic polyester elastomer yarn according to claim 1, characterized in that, The ratio of the diameter of the simulated yarn area to the distance between two adjacent simulated yarn areas is 0.133 to 60.

8. The method for manufacturing thermoplastic polyester elastomer yarn according to claim 1, characterized in that, The yarn-dotting area has multiple interconnected connecting segments, the number of which is the same as the number of the yarn-dotting areas, and each connecting segment is connected to one of the yarn-dotting areas.

9. The method for manufacturing thermoplastic polyester elastomer yarn according to claim 8, characterized in that, The length of the connecting segment is 0.1 mm to 0.3 mm.

10. The method for manufacturing thermoplastic polyester elastomer yarn according to claim 8, characterized in that, The width of the connecting segment is 0.01 mm to 0.5 mm.

11. The method for manufacturing thermoplastic polyester elastomer yarn according to claim 8, characterized in that, The ratio of the diameter of the simulated yarn area to the length of the connecting segment is 1.33 to 30.

12. The method for manufacturing thermoplastic polyester elastomer yarn according to claim 8, characterized in that, The ratio of the diameter of the simulated yarn area to the width of the connecting segment is 0.8 to 300.

13. A thermoplastic polyester elastomer yarn, characterized in that, The thermoplastic polyester elastomer yarn is manufactured by the manufacturing method according to any one of claims 1 to 12, and the thermoplastic polyester elastomer yarn is integrally molded; wherein, the thermoplastic polyester elastomer yarn has a plurality of outwardly protruding yarn-like portions, the thermoplastic polyester elastomer yarn 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 is 1.2 to 5.

14. The thermoplastic polyester elastomer yarn according to claim 13, characterized in that, The thermoplastic polyester elastomer yarn has a denier number of 15 to 100.

15. The thermoplastic polyester elastomer yarn according to claim 13, characterized in that, The outer radius is 40 micrometers to 170 micrometers.

16. The thermoplastic polyester elastomer yarn according to claim 13, characterized in that, The inner radius is between 25 micrometers and 115 micrometers.

17. The thermoplastic polyester elastomer yarn according to claim 13, characterized in that, The radius of curvature of the yarn-like part is 10 micrometers to 45 micrometers.

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