Cationic dyeable super-moisture-absorption super-warm-keeping super-cotton-like polyester DTY and preparation method thereof

Abstract

The invention discloses a cationic dyeable super-moisture-absorption super-warm-keeping super-cotton-like polyester DTY and a preparation method thereof, and relates to the field of spinning, the preparation method comprises the following steps: step S10, plying and holding a first silk yarn and a second silk yarn to form a cationic polyester plied yarn; the first silk yarn is a fully drawn yarn, and a plurality of grooves are formed outside the first silk yarn; the second silk yarns are cationic pre-oriented yarns; s20, heating the cationic polyester plied yarn in a first hot box, cooling, feeding into a false twister for false twisting, stretching between a first roller and a second roller, and feeding into a second hot box through a third roller for secondary heating and shaping; and S30, enabling the third silk yarn to enter a fourth roller through an external yarn guide tube from a third roller, compounding the third silk yarn and the cationic polyester plied yarn between the third roller and the fourth roller through a bottom net, and winding to obtain the cationic dyeable super-moisture-absorption super-warm-keeping super-cotton-like polyester DTY. A through hole is formed in the third silk thread. According to the DTY and the preparation method thereof, the fiber has better hygroscopicity, heat retention property and cotton feeling.

Description

Technical Field

[0001] This specification relates to the field of spinning technology, and in particular to a cationic dyeable, super-hygroscopic, super-warm, and super-cotton-like polyester DTY and its preparation method. Background Technology

[0002] Cotton is a natural fiber. Its natural flexural structure gives cotton yarn fabric its unique texture and breathability. The main structure of cotton fiber is cellulose, rich in hydroxyl groups, and its water absorption can reach 8%-10%; it also possesses excellent warmth retention due to its unique cavity structure. With its unique texture, strong water absorption, and warmth retention, cotton fiber has become an important raw material for underwear.

[0003] In recent years, outdoor sports have become increasingly popular. Although cotton fiber has good water absorption and warmth retention properties, it is rarely used in outdoor fabrics because of its low strength, susceptibility to acids and alkalis, and tendency to wrinkle.

[0004] Polyester-based cotton-like fabrics mimic the tumbled structure of natural cotton, resulting in a texture and feel nearly identical to cotton. Compared to cotton fibers, polyester is more resistant to acids and alkalis, wrinkle less easily, and is less expensive, making it more suitable for outdoor fabrics. However, polyester itself does not absorb water, with an absorption rate of only 0.4%. It also lacks warmth retention, relying solely on its tumbled structure to create a microporous structure that provides physical absorbency, which is far inferior to the natural absorbency and warmth retention properties of cotton fibers.

[0005] Currently, polyester imitation cotton is mainly made by using a texturing machine to twist polyester POY (Partially Oriented Yarn) and polyester DTY (Draw Textured Yarn) together. In terms of texture and feel, it is almost the same as cotton, but in terms of functionality such as water absorption and warmth retention, it is still far behind cotton fiber fabric. Summary of the Invention

[0006] In view of the shortcomings of the prior art, one object of this specification is to provide a cationic dyeable super-hygroscopic, super-warm, and super-cotton-like polyester DTY and its preparation method, so that the fiber has better moisture absorption, warmth retention and cotton feel.

[0007] To achieve the above objectives, this specification provides a method for preparing cationic dyeable super-hygroscopic, super-warm, and super-cotton-like polyester DTY, comprising the following steps: Step S10: The first and second filaments are twisted together to form a cationic polyester twisted yarn; the first filament is a fully drawn yarn (FDY) with multiple grooves extending along its length on its outer surface; the second filament is a cationic pre-oriented yarn. Step S20: The anodized polyester filament is heated in the first heating box, then cooled and then false-twisted in the false twister and stretched between the first and second rollers, and then passed through the third roller to the second heating box for secondary heating and shaping; Step S30: The third yarn is fed to the third roller and then into the fourth roller through an external guide tube. The third yarn and the cationic polyester filament are bonded together between the third roller and the fourth roller through a bottom mesh, and then wound to obtain cationic dyeable super absorbent, super warm, and super cotton-like polyester DTY. The third yarn is a fully drawn yarn, and the interior of the third yarn has through holes extending along the length direction.

[0008] In a preferred embodiment, step S10 includes: drawing the first wire and the second wire out from the first guide tube and the second guide tube respectively and feeding them into the fifth roller simultaneously, passing through the pre-net nozzle and then exiting through the first roller; the first wire and the second wire are stranded and intertwined between the fifth roller and the first roller through the pre-net nozzle; the orifice diameter of the pre-net nozzle is 1.4mm~1.8mm, and the pre-net air pressure is 1.5bar~3.2bar.

[0009] In a preferred embodiment, step S20 includes: heating the anodized polyester filament via a lifting screw to the first heating box, cooling it via a cooling plate, and then false-twisting it in a false twister and stretching it between the first and second rollers; after exiting the second roller, it passes through the third roller to the second heating box for shaping; the temperature of the first heating box is 160℃~180℃, and the temperature of the second heating box is 150℃~170℃.

[0010] In a preferred embodiment, the speed of the second roller is 500 m / min to 550 m / min; the ratio of the linear speed of the second roller to that of the first roller is 1.02 to 1.1.

[0011] In a preferred embodiment, step S30 includes: drawing the third yarn out through the lifting screw support to the third roller, then entering the fourth roller through an external guide tube; the third yarn and the cationic polyester ply yarn are compounded between the third roller and the fourth roller through a bottom mesh, and then wound by a black roller to obtain cationic dyeable super absorbent, super warm, and super cotton-like polyester DTY; the nozzle orifice diameter of the bottom mesh is 1.4mm~2.2mm, and the air pressure of the bottom mesh is 2.0bar~4.0bar.

[0012] In a preferred embodiment, the ratio of the difference in linear velocity between the second roller and the fifth roller to the linear velocity of the second roller is -0.02 to -0.04; the ratio of the difference in linear velocity between the second roller and the third roller to the linear velocity of the second roller is -0.001 to 0; and the ratio of the difference in linear velocity between the second roller and the fourth roller to the linear velocity of the second roller is 0.02 to 0.04.

[0013] In a preferred embodiment, the first filament has a cross-shaped cross section and four grooves; the first filament has a breaking strength greater than or equal to 3.5 cn / dtex, a breaking elongation of 20% to 25%, and a boiling water shrinkage rate of 1.5% to 3%.

[0014] In a preferred embodiment, the second filament has a breaking strength greater than or equal to 1.8 cn / dtex, a breaking elongation of 100% to 120%, and a boiling water shrinkage rate of 40% to 60%.

[0015] In a preferred embodiment, the cross-section of the through hole is circular, the breaking strength of the third wire is greater than or equal to 3.0 cn / dtex, the breaking elongation of the third wire is 60%~80%, and the boiling water shrinkage rate of the third wire is 25%~40%.

[0016] This application also provides a cationic dyeable super absorbent, super warm, and super cotton-like polyester DTY, which is prepared by the preparation method described in any of the above embodiments. Beneficial effects

[0017] The method for preparing cationic dyeable super absorbent, super warm, and super cotton-like polyester DTY provided in this embodiment enhances the absorbency, warmth, and cotton feel of the cotton-like material by introducing a first filament with multiple grooves on the outside and a third filament with through holes in the inside; and enriches the cotton-like dyeing style by introducing cationic POY (i.e., the second filament), giving it a two-color function.

[0018] The first filament, with its abundant grooves, creates a capillary effect, providing the fiber with strong moisture-wicking properties while also providing rigid support for the composite fiber. The false twisting of the first and second filaments (cationic POY) solves the spinnability issue of POY in its unstretched state. Because the first filament is rigid and has high tension, it can be properly untwisted after false twisting, resulting in a fluffy filament that envelops the second filament. The second filament, being unstretched and blended with the rigid first filament, cannot be properly untwisted during false twisting, resulting in a stiff, non-fluffy filament with a fixed twist direction, and is thus encased by the first filament.

[0019] The third yarn provides warmth and high shrinkage performance to the composite yarn. Its hollow structure allows it to store more air, significantly improving the insulation performance of the composite yarn. It was chosen as the base layer composite primarily because its hollow structure is susceptible to damage from the false twisting device, resulting in a loss of insulation performance. Due to its need for high shrinkage performance, it can only be achieved through an external guide tube to prevent the third yarn from being prematurely crystallized and solidified by heating in the second heating box, which would affect its shrinkage performance.

[0020] After the composite yarn (i.e. the final cationic dyeable super absorbent, super warm, and super cotton-like polyester DTY) is treated with boiling water, the shrinkage of the second yarn and the solidified twist direction will shrink into a twisted structure, while the third yarn will intensify the shrinkage in this twisted direction, resulting in more twists and a more cotton-like feel than ordinary cotton.

[0021] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope as a result.

[0022] Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0023] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, whole, step, or component, but does not exclude the presence or addition of one or more other features, wholes, steps, or components. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a flowchart of the steps in the preparation method of cationic dyeable super-hygroscopic, super-warm, and super-cotton-like polyester DTY provided in this embodiment; Figure 2 To implement Figure 1 A simplified diagram illustrating the on-site work during the manufacturing process. Figure 3 This is a schematic diagram of the cross-section of the multiple first wires in this embodiment; Figure 4 for Figure 3 A schematic diagram of the cross-section of the first filament in the middle; Figure 5 This is a schematic diagram of the cross-section of the multiple third wires in this embodiment; Figure 6 for Figure 5 A schematic diagram of the cross-section of a third filament.

[0026] Explanation of reference numerals in the attached figures: 1. First yarn; 101. Groove; 2. Second yarn; 3. Third yarn; 301. Through hole; 4. First guide tube; 5. Second guide tube; 6. Fifth roller; 7. Pre-net; 8. First roller; 9. First heating box; 10. False twister; 11. Second roller; 12. Third roller; 13. Second heating box; 14. Lifting screw support; 15. External guide tube; 16. Fourth roller; 17. Bottom net; 18. Cationic dyeable super absorbent, super warm, super cotton-like polyester DTY. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0028] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or may be interposed with another element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or may be interposed with another element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Please see Figure 1 and Figure 2 This application provides a method for preparing cationic dyeable, super absorbent, super warm, and super cotton-like polyester DTY, including the following steps (steps S10, S20, and S30): Step S10: Twist the first thread 1 and the second thread 2 together to form a positively bonded yarn.

[0031] Among them, such as Figure 3 and Figure 4As shown, the first filament 1 is a fully drawn filament, and the outer surface of the first filament 1 has multiple grooves 101 extending along its length. The grooves 101 can form a capillary effect, providing the fiber with strong moisture absorption and wicking properties, while also enhancing rigidity support. The second filament 2 is a cationic pre-oriented filament.

[0032] Specifically, step S10 includes: drawing the first filament 1 and the second filament 2 from the first guide tube 4 and the second guide tube 5 respectively, feeding them simultaneously from the fifth roller 6, passing through the pre-net nozzle 7, and then exiting from the first roller 8. The first filament 1 and the second filament 2 are intertwined and bonded between the fifth roller 6 and the first roller 8 through the pre-net nozzle 7. The false twisting of the first filament 1 and the second filament 2 (cationic POY) solves the spinnability problem of POY in its unstretched state. Because the first filament 1 is rigid and has high tension, it can be untwisted normally after false twisting, and the fluffy filament wraps around the second filament 2; the second filament 2, because it is unstretched and intertwined with the rigid first filament 1, cannot be untwisted normally, the filament is stiff and not fluffy, the twist direction is solidified, and it is wrapped around the first filament 1.

[0033] Preferably, the orifice diameter of the nozzle of the pre-net 7 is 1.4mm to 1.8mm, and the air pressure of the pre-net 7 is 1.5bar to 3.2bar.

[0034] In a preferred embodiment, the first wire 1 has a cross-shaped cross section, and the number of grooves 101 is four. Of course, the number of grooves 101 can be designed according to actual needs, and this application does not impose a unique limitation.

[0035] Preferably, the depth of the groove 101 is 20% to 40% of the radius of the first filament 1. If the depth of the groove 101 is too low, the moisture absorption will decrease. If the depth of the groove 101 is too high, the rigid support will be insufficient and the spinnability will decrease.

[0036] Specifically, the breaking strength of the first filament 1 is greater than or equal to 3.5 cm / dtex, the breaking elongation of the first filament 1 is 20%~25%, and the boiling water shrinkage rate of the first filament 1 is 1.5%~3%. The first filament 1 plays a rigid supporting role in the composite fiber and is the key to the spinnability of the composite fiber. Therefore, it should have the characteristics of high strength and low boiling water shrinkage. If the strength is too low or the boiling water shrinkage is too large, it will cause insufficient twisting, reduced cotton feel, or even failure to weave normally.

[0037] The second filament 2 has a breaking strength greater than or equal to 1.8 cm / dtex, a breaking elongation of 100%~120%, and a boiling water shrinkage rate of 40%-60%. The second filament 2 plays a crucial role in the composite fiber's active shrinkage and moisture-wicking properties, which is key to its cotton-like feel. Therefore, it should possess low strength and high boiling water shrinkage. If the strength is too high or the boiling water shrinkage is too low, insufficient twisting will result in an inability to achieve a cotton-like effect.

[0038] Step S20: The anodized polyester filament is heated in the first heating box 9, then cooled and false twisted in the false twister 10 and stretched between the first roller 8 and the second roller 11, and then passed through the third roller 12 to the second heating box 13 for secondary heating and shaping.

[0039] Specifically, step S20 includes: heating the anodized polyester filament via a lifting screw to the first heating box 9, cooling it via a cooling plate, and then false-twisting it in the false twister 10 and stretching it between the first roller 8 and the second roller 11; after exiting the second roller 11, it passes through the third roller 12 to the second heating box 13 for shaping. The first heating box 9 is positioned higher than the second heating box 13.

[0040] Preferably, the temperature of the first heating box 9 is 160℃~180℃, and the temperature of the second heating box 13 is 150℃~170℃. The speed of the second roller 11 is the machine speed, which is 500m / min~550m / min. The ratio of the linear velocity of the second roller 11 to that of the first roller 8 (i.e., the stretch ratio) is 1.02~1.1. The false twister 10 has a 1-5-1 disc assembly.

[0041] Step S30: The third yarn 3 is fed to the third roller 12 and then enters the fourth roller 16 through the external guide tube 15. The third yarn 3 and the cationic polyester ply yarn are combined between the third roller 12 and the fourth roller 16 through the bottom net 17, and then wound to obtain cationic dyeable super absorbent, super warm and super cotton-like polyester DTY18.

[0042] Among them, such as Figure 5 and Figure 6 As shown, the third wire 3 is a fully drawn wire, and the interior of the third wire 3 has through holes 301 extending along its length. This application does not impose a unique limitation on the number of through holes 301, such as... Figure 6 As shown, the number of through holes 301 can be two. Preferably, the hollow ratio of the third wire 3 is 20% to 30%, that is, the cross-sectional area of ​​the through hole 301 accounts for 20% to 30% of the cross-sectional area of ​​the third wire 3, mainly providing supplementary shrinkage and heat preservation functions. If the hollow ratio is too low, the heat preservation will decrease.

[0043] Preferably, the cross-section of the through hole 301 is circular. The breaking strength of the third filament 3 is greater than or equal to 3.0 cm / dtex, the breaking elongation of the third filament 3 is 60%~80%, and the boiling water shrinkage rate of the third filament 3 is 25%~40%. The strength and boiling water shrinkage of the third filament 3 are between those of the first filament 1 and the second filament 2. If its strength is too high and its boiling water shrinkage is too low, it will lead to insufficient twisting and a decrease in cotton feel; conversely, if the composite fiber shrinks too much, the rigid support will be insufficient and the spinnability will decrease.

[0044] Specifically, step S30 includes: drawing the third yarn 3 out through the lifting screw support 14 to the third roller 12, and then entering the fourth roller 16 through the external guide tube 15. The third yarn 3 and the cationic polyester ply yarn are combined between the third roller 12 and the fourth roller 16 through the bottom net 17, and then wound by a black roller to obtain cationic dyeable super absorbent, super warm, and super cotton-like polyester DTY18. After the third yarn 3 is drawn out from the third roller 12, it does not pass through the second heating box 13, but is directly introduced into the fourth roller 16 through the external guide tube 15, which is independently set outside the second heating box 13, to avoid high-temperature setting damaging its hollow structure. If the third yarn 3 passes through the second heating box 13, its shrinkage performance will be significantly reduced due to premature crystallization and setting, thereby weakening the bending and warmth retention effects.

[0045] Preferably, the nozzle orifice diameter of the bottom mesh 17 is 1.4mm~2.2mm, and the air pressure of the bottom mesh 17 is 2.0bar~4.0bar. The ratio of the difference in linear velocity between the second roller 11 and the fifth roller 6 to the linear velocity of the second roller 11 is -0.02~-0.04 (i.e., one overfeed is -2%~-4%). ​​The ratio of the difference in linear velocity between the second roller 11 and the third roller 12 to the linear velocity of the second roller 11 is -0.001~0 (i.e., two overfeeds are -0.1%~0%). The ratio of the difference in linear velocity between the second roller 11 and the fourth roller 16 to the linear velocity of the second roller 11 is 0.02~0.04 (i.e., three overfeeds are 2%~4%).

[0046] It should be noted that the "super absorbent" in this application refers to the DTY fiber or its fabric prepared by the method of this invention having a wicking height (according to FZ / T01071-2008 "Test Method for Capillary Effect of Textiles") greater than 85 mm in 10 minutes, which is more than 102% higher than that of ordinary round cross-section polyester DTY. The "super warm" refers to the fabric having a thermal resistance (or clo value) greater than 0.4, which is more than 50% higher than that of ordinary cotton-like polyester DTY. The "super cotton-like" refers to the fiber cross-section exhibiting an irregular or shaped appearance similar to natural cotton fibers, and after boiling water treatment, the fiber's crimp shrinkage rate can reach more than 20%, possessing a twisted structure and feel similar to cotton fibers.

[0047] The method for preparing cationic dyeable super absorbent, super warm, and super cotton-like polyester DTY provided in this embodiment enhances the absorbency, warmth, and cotton feel of cotton-like fabric by introducing a first filament 1 with multiple grooves 101 on the outside and a third filament 3 with through holes 301 in the inside; and enriches the cotton-like dyeing style by introducing cationic POY (i.e., the second filament 2), giving it a two-color function.

[0048] The first filament 1, with its abundant grooves 101, creates a capillary effect, providing the fiber with strong moisture-wicking properties while also providing rigid support for the composite fiber. The false twisting of the first filament 1 and the second filament 2 (cationic POY) solves the spinnability issue of POY in its unstretched state. Because the first filament 1 is rigid and has high tension, it can be properly untwisted after false twisting, resulting in a fluffy filament that encapsulates the second filament 2. The second filament 2, being unstretched and falsely twisted with the rigid first filament 1, cannot be properly untwisted, resulting in a stiff, non-fluffy filament with a fixed twist direction, and is thus encapsulated by the first filament 1.

[0049] The third thread 3 provides warmth and high shrinkage performance to the composite yarn. Its hollow structure allows it to store more air, significantly improving the warmth retention of the composite yarn. It was chosen as the base yarn for the composite yarn 17 primarily because its hollow structure would be damaged by the false twister 10, resulting in a loss of warmth retention. Due to its need for high shrinkage performance, it can only be achieved through an external guide tube 15 to prevent the third thread 3 from being prematurely crystallized and solidified by heating in the second heating box 13, which would affect its shrinkage performance.

[0050] After the composite yarn (i.e. the final cationic dyeable super absorbent, super warm, and super cotton-like polyester DTY) is treated with boiling water, the shrinkage of the second yarn 2 and the solidified twist direction will shrink into a twisted structure, while the third yarn 3 will intensify the shrinkage in this twisted direction, resulting in more twists and a more cotton-like feel than ordinary cotton.

[0051] In a specific embodiment 1, following steps S10, S20, and S30, the first filament 1 is selected as a cross-shaped FDY with a breaking strength of 3.6 cm / dtex, an elongation at break of 22%, and a boiling water shrinkage rate of 2%; the second filament 2 is a cationic POY with a breaking strength of 1.9 cm / dtex, an elongation at break of 110%, and a boiling water shrinkage rate of 50%; and the third filament 3 is a hollow FDY with a breaking strength of 3.2 cm / dtex, an elongation at break of 70%, and a boiling water shrinkage rate of 30%. Specific process parameters are: pre-net air pressure 2.0 bar, first hot box temperature 170°C, second hot box temperature 160°C, machine speed 520 m / min, draw ratio 1.05, bottom net air pressure 3.0 bar, first overfeed -3%, second overfeed -0.05%, and third overfeed 3%.

[0052] For comparison, Comparative Example 1 was set up: it was basically the same as Example 1, except that the third yarn 3 was not added, and DTY was made only by twisting the first yarn 1 and the second yarn 2. The fabrics made in Example 1 and Comparative Example 1 were subjected to performance tests, and the results are shown in Table 1 below: Table 1 Test Project Example 1 Comparative Example 1 Test Standards Cubic suction height (mm) 120 100 FZ / T01071-2008 "Test Method for Capillary Effect in Textiles" CLO (Crow Value) 0.5 0.25 GB / T18398-2001 "Clothing Thermal Resistance Test Method - Warm Body Dummy Method" Curl shrinkage rate (%) 21 10 GB / T6506-2017 Test Method for Shrinkage Properties of Synthetic Fiber Textured Yarn As can be seen from the table above, the DTY prepared in Example 1 of the present invention is significantly better than that in Comparative Example 1 in terms of moisture absorption, warmth retention and cotton-like feel (curling shrinkage rate), which proves the excellent effect of the technical solution of the present invention.

[0053] Based on the same concept, this embodiment of the invention also provides a cationic dyeable super absorbent, super warm, and super cotton-like polyester DTY, which is prepared by the preparation method provided in any of the above embodiments.

[0054] In this embodiment, the embodiment of the cationic dyeable super-hygroscopic super-warm super-cotton-like polyester DTY corresponds to the embodiment of the preparation method. It can solve the technical problems solved by the embodiment of the preparation method and achieve the technical effects of the embodiment of the preparation method. The specific details will not be repeated here.

[0055] It should be noted that in the description of this specification, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this specification, unless otherwise stated, "a plurality of" means two or more.

[0056] Any numerical values ​​cited herein include all values ​​ranging from a lower limit to an upper limit, increasing by one unit, with at least two units between any lower and any higher value. For example, if the quantity of a component or the value of a process variable (e.g., temperature, pressure, time, etc.) is described as being from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, the purpose is to illustrate that values ​​such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also explicitly listed in this specification. For values ​​less than 1, a unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1, etc. These are merely examples intended for explicit expression, and it can be assumed that all possible combinations of values ​​listed between the minimum and maximum values ​​are explicitly described in this specification in a similar manner.

[0057] Unless otherwise stated, all ranges include the endpoints and all numbers between them. The terms "approximately" or "about" used with ranges apply to both endpoints of the range. Thus, "approximately 20 to 30" is intended to cover "approximately 20 to approximately 30," including at least the specified endpoints.

[0058] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified elements, components, parts, or steps, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute included by “may” is optional.

[0059] Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The use of "a" or "an" to describe an element, component, part, or step does not imply the exclusion of other elements, components, parts, or steps.

[0060] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this teaching should not be determined by reference to the above description, but rather by reference to the appended claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the inventors have not considered that subject matter as part of the disclosed inventive subject matter.

Claims

1. A method for preparing cationic dyeable super-hygroscopic, super-warm, and super-cotton-like polyester DTY, characterized in that, Includes the following steps: step S10: The first and second filaments are twisted together to form a positive polyester twisted filament; The first filament is a fully drawn filament, and the exterior of the first filament has multiple grooves extending along its length. The second filament is a cationic pre-oriented filament; Step S20: The anodized polyester filament is heated in the first heating box, then cooled and then false-twisted in the false twister and stretched between the first and second rollers, and then passed through the third roller to the second heating box for secondary heating and shaping; Step S30: The third yarn is fed to the third roller and then into the fourth roller through an external guide tube. The third yarn and the cationic polyester filament are bonded together between the third roller and the fourth roller through a bottom mesh, and then wound to obtain cationic dyeable super absorbent, super warm, and super cotton-like polyester DTY. The third yarn is a fully drawn yarn, and the interior of the third yarn has through holes extending along the length direction.

2. The preparation method of cationic dyeable super-hygroscopic, super-warm, and super-cotton-like polyester DTY according to claim 1, characterized in that, Step S10 includes: drawing the first wire and the second wire out from the first guide tube and the second guide tube respectively and feeding them into the fifth roller at the same time, passing through the pre-net nozzle and then exiting through the first roller; the first wire and the second wire are stranded and intertwined between the fifth roller and the first roller through the pre-net nozzle; the orifice diameter of the pre-net nozzle is 1.4mm~1.8mm, and the pre-net air pressure is 1.5bar~3.2bar.

3. The preparation method of cationic dyeable super-hygroscopic, super-warm, and super-cotton-like polyester DTY according to claim 2, characterized in that, Step S20 includes: heating the anodized polyester filament via a lifting screw to the first heating box, cooling it via a cooling plate, and then false-twisting it in a false twister and stretching it between the first and second rollers; after exiting the second roller, it passes through the third roller to the second heating box for shaping; the temperature of the first heating box is 160℃~180℃, and the temperature of the second heating box is 150℃~170℃.

4. The preparation method of cationic dyeable super-hygroscopic, super-warm, and super-cotton-like polyester DTY according to claim 3, characterized in that, The speed of the second roller is 500 m / min to 550 m / min; the ratio of the linear velocity of the second roller to that of the first roller is 1.02 to 1.

1.

5. The preparation method of cationic dyeable super-hygroscopic, super-warm, and super-cotton-like polyester DTY according to claim 3, characterized in that, Step S30 includes: drawing the third yarn out through the lifting screw support to the third roller, and then entering the fourth roller through the external guide tube; the third yarn and the cationic polyester ply yarn are compounded between the third roller and the fourth roller through a bottom mesh, and then wound by a black roller to obtain cationic dyeable super absorbent, super warm, and super cotton-like polyester DTY; the nozzle orifice diameter of the bottom mesh is 1.4mm~2.2mm, and the air pressure of the bottom mesh is 2.0bar~4.0bar.

6. The preparation method of cationic dyeable super-hygroscopic, super-warm, and super-cotton-like polyester DTY according to claim 5, characterized in that, The ratio of the difference in linear velocity between the second and fifth rollers to the linear velocity of the second roller is -0.02 to -0.04; the ratio of the difference in linear velocity between the second and third rollers to the linear velocity of the second roller is -0.001 to 0; the ratio of the difference in linear velocity between the second and fourth rollers to the linear velocity of the second roller is 0.02 to 0.

04.

7. The preparation method of cationic dyeable super-hygroscopic, super-warm, and super-cotton-like polyester DTY according to claim 1, characterized in that, The first filament has a cross-shaped cross section and four grooves; the first filament has a breaking strength greater than or equal to 3.5 cn / dtex, a breaking elongation of 20% to 25%, and a boiling water shrinkage rate of 1.5% to 3%.

8. The preparation method of cationic dyeable super-hygroscopic, super-warm, and super-cotton-like polyester DTY according to claim 1, characterized in that, The second filament has a breaking strength greater than or equal to 1.8 cn / dtex, a breaking elongation of 100% to 120%, and a boiling water shrinkage rate of 40% to 60%.

9. The preparation method of cationic dyeable super-hygroscopic, super-warm, and super-cotton-like polyester DTY according to claim 1, characterized in that, The cross-section of the through hole is circular, the breaking strength of the third wire is greater than or equal to 3.0 cn / dtex, the breaking elongation of the third wire is 60%~80%, and the boiling water shrinkage rate of the third wire is 25%~40%.

10. A cationic dyeable, super absorbent, super warm, and super cotton-like polyester DTY, characterized in that, The cationic dyeable, super absorbent, super warm, and super cotton-like polyester DTY is prepared by the preparation method described in any one of claims 1 to 9.

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