A kind of soft velvety polyester blended yarn and its manufacturing method

Abstract

This application discloses a velvety polyester blended yarn and its production method, relating to the field of polyester fiber manufacturing. The production method involves cooling a polyester melt spinneret to produce spun fibers. The spun fibers are then divided into two groups, oiled to produce FDY and POY yarns, respectively. The fibers are then blended and wound to produce a blended yarn. The POY yarn in the blended yarn has a finer fineness than the FDY yarn, with a difference of 10 to 30 dtex. The blended yarn has a boiling water shrinkage of 60 ± 5%. The polyester blended yarn of this application is suitable for producing jacquard fabrics, ensuring the fabrics have a good velvety feel.

Description

Technical Field

[0001] The present application relates to the field of polyester fibers, and in particular to a velvety polyester blended yarn and a method for manufacturing the same. Background Art

[0002] Traditional jacquard fabrics achieve diverse visual layers and tactile textures through yarn type combinations, innovative arrangements, and fabric structure design. Their unique dense yarn count structure places extremely high demands on the uniformity and stability of the raw materials, which also makes the finished fabrics have excellent morphological stability, easy care, and wearing comfort. The current mainstream process mostly uses a polyester filament and cotton yarn interwoven system. By taking advantage of the difference in dyeing properties of polyester and cotton two-component fibers, a natural color-dyed effect can be achieved in a single dyeing process, significantly improving production efficiency. However, the difference in shrinkage between polyester and cotton fibers in hot and humid environments leads to surface defects such as blistering and wrinkles on the fabric after dyeing, which seriously restricts the application and expansion of such products in the field of high-end home textiles.

[0003] In recent years, the industry has experimented with blending pre-oriented yarn (POY) and fully drawn yarn (FDY) to create polyester blended yarn (ITY) as a jacquard raw material. This technology effectively simplifies the yarn processing steps in traditional processes, reducing energy consumption and labor costs. Although POY and FDY are both polyester fibers, the difference in molecular orientation still results in differential thermal shrinkage. This differential shrinkage can form a spiral crimp structure after heat treatments such as dyeing and finishing, enhancing the fabric's fleece feel. However, excessive shrinkage differentials can also cause noticeable surface defects such as blistering and wrinkles, reducing the fabric's surface smoothness and preventing the creation of a smooth, plush, and velvety fabric. Summary of the Invention

[0004] The present application provides a soft and velvety polyester blended yarn and a manufacturing method thereof, wherein the manufacturing method can produce a blended jacquard fabric that has an excellent wooly feel after dyeing and finishing and does not bubble or wrinkle.

[0005] In the first aspect, the present application provides a method for manufacturing a soft and velvety polyester blended yarn, in which the polyester melt is spun and cooled to obtain spun fibers, which are divided into two groups and oiled to prepare FDY yarn and POY yarn respectively, which are then blended and wound through a network; the fineness of the POY yarn in the blended yarn is greater than that of the FDY yarn, and the difference is 10 to 30 dtex, and the boiling water shrinkage of the blended yarn is 60±5%.

[0006] In any of the above technical solutions, the specification of the mixed fiber yarn is 135dtex / 108F, wherein the fineness of the POY yarn is 70-80dtex, and the fineness of the FDY yarn is 50-65dtex.

[0007] This application reduces the difference in shrinkage between FDY and POY yarns in a blended yarn. By controlling the POY dtex to be greater than the FDY dtex, with the difference within a range of 10 to 30 dtex, a blended yarn with a moderate boiling water shrinkage can be obtained, resulting in a blended yarn that exhibits an excellent wooly feel after dyeing and finishing without blistering or wrinkling, and ultimately, a smooth, plush, and velvety jacquard fabric. It should be noted that when the difference between the POY and FDY dtex in the blended yarn is too high, the resulting blended yarn exhibits excessively high boiling water shrinkage, making the jacquard fabric susceptible to fuzzing and wrinkling. Conversely, when the difference is too low, the blended yarn exhibits excessively low boiling water shrinkage, resulting in an insufficient crimp structure formed after dyeing and finishing of the jacquard fabric, reducing its wooly feel.

[0008] It should be noted that the decitex of FDY yarn and POY yarn depends on the fineness of the single yarn before bundling, and the fineness of the single yarn (spun fiber) is controlled by a metering pump.

[0009] In any of the above technical solutions, the oil content of the mixed fiber yarn is 0.40±0.1%.

[0010] In any of the above technical solutions, the drawing temperature of the FDY yarn during drawing and setting is 82-88° C., the setting temperature is 105-120° C., and the stretching ratio after drawing and setting is 2.8-3.3.

[0011] In any of the above technical solutions, the number of network points of the mixed fiber yarn is 25 to 30 per meter.

[0012] The existing fiber blending process has a relatively loose network structure and a small number of network points (15-20 per meter), making it difficult to form a stable fiber synergy system during the subsequent weaving process. When subjected to external forces, excessive shrinkage differences can exacerbate displacement and misalignment between fibers, ultimately affecting the surface smoothness of the fabric. This application, by increasing the number of network points, can improve the firmness of the fiber blending and reduce the smoothness issues caused by fiber misalignment.

[0013] In any of the above technical solutions, the spinning speed is 3000-4000 m / min, the spinning temperature is 285-290°C, the cooling air pressure is 30±10 Pa, and the air temperature is 20±5°C.

[0014] In any of the above technical solutions, the polyester melt contains 1.5 to 2.5 wt% of modified nano-titanium dioxide, and ester groups are grafted onto the surface of the modified nano-titanium dioxide.

[0015] The modified nano titanium dioxide mentioned above in the present application is added into the polyester melt through an online adding system.

[0016] For example, the polyester melt contains 2 wt % of the modified nano-titanium dioxide, that is, the mass ratio of the modified nano-titanium dioxide to the polyester melt is 2:98.

[0017] In any of the above technical solutions, the D50 particle size of the nano-titanium dioxide is 50 to 500 nm, more preferably 100 to 300 nm.

[0018] In any of the above technical solutions, the ester group is obtained by grafting methacrylate onto the surface of modified nano-titanium dioxide.

[0019] In any of the above technical solutions, the raw materials of the modified nano-titanium dioxide include nano-titanium dioxide, methacryloxysiloxane, methacrylate, and an alkenyl compound having a nitrogen-containing heterocycle in a mass ratio of 1:0.15-0.25:0.8-1.2:0.3-0.5.

[0020] The methacryloyloxysiloxane is used to modify the surface of nano-titanium dioxide, and then undergoes free radical copolymerization reaction with methacrylate and an alkenyl compound having a nitrogen-containing heterocyclic ring.

[0021] In any of the above technical solutions, the methacryloxysiloxane is selected from one or more of methacryloxypropyltrimethoxysilane, methacryloxyethyltrimethoxysilane, methacryloxyphenyltrimethoxysilane, and methacryloxymethyldiethoxysilane.

[0022] In any of the above technical solutions, the methacrylate is selected from one or more of methyl methacrylate, ethyl methacrylate, propyl methacrylate or butyl methacrylate.

[0023] In any of the above technical solutions, the alkenyl compound having a nitrogen-containing heterocycle is selected from one or more of vinyl imidazole, allyl imidazole, vinyl pyrrolidone, and vinyl pyridine.

[0024] In any of the above technical solutions, the free radical copolymerization reaction is carried out in the presence of an initiator, and the initiator is selected from persulfate or benzoyl peroxide.

[0025] For example, the amount of the initiator is 1 to 2 wt % of the total weight of the methacryloxysiloxane, the methacrylate, and the alkenyl compound having a nitrogen-containing heterocyclic ring.

[0026] In any of the above technical solutions, the diluent oil for oiling contains 1 to 3 wt % of a water-soluble copper salt.

[0027] Exemplarily, the water-soluble copper salt is selected from copper chloride, copper sulfate or copper acetate.

[0028] When the POY decitex number is significantly higher than that of FDY, the FDY yarn is thinner in diameter and has a lower shrinkage rate. Under repeated friction or external stretching, it is easy for the fibers to slip or even break, resulting in fuzzing or broken ends. To overcome this problem, the present application adds an appropriate amount of modified nano-titanium dioxide to the polyester melt. The rigid core of the nano-titanium dioxide can induce local stress concentration during the fiber stretching process, promote the orientation of the polyester molecular chain, and improve the fiber breaking strength. In addition, the ester group grafted on its surface forms a hydrogen bond with the ester bond of the polyester molecular chain, significantly improving the dispersion stability of the nanoparticles in the melt and avoiding the problem of spinning broken ends caused by agglomeration.

[0029] Furthermore, nitrogen-containing heterocycles are introduced on the surface of modified nano-titanium dioxide. When the mixed fiber comes into contact with an oil containing copper ions during the oiling process, the copper ions diffuse into the interior of the fiber under the high-temperature environment of 82 to 120°C for drawing and shaping, and coordinate with the amino groups on the surface of the nanoparticles to form stable Cu-N coordination bonds. This strong coordination effect can construct three-dimensional cross-linking points inside the fiber, limit the slippage movement of the molecular chain, and reduce the phenomenon of floating fibers and broken ends caused by friction with the equipment.

[0030] It should be noted that polyester fiber oiling and bundling usually adopts emulsion-type diluent oil, which is prepared by dispersing and mixing oil, emulsifier and water.

[0031] Exemplarily, the emulsifier is fatty alcohol polyoxyethylene ether or alkylphenol polyoxyethylene ether.

[0032] In any of the above technical solutions, the content of oil agent in the diluent oil is 20 to 30 wt%.

[0033] In a second aspect, the present application provides a soft and velvety polyester blended yarn, which is produced by any of the above-mentioned manufacturing methods.

[0034] In summary, this application has the following beneficial effects:

[0035] This application achieves a moderate shrinkage differential during dyeing and finishing of blended yarns by regulating the fineness difference between POY and FDY (15-30 dtex) and the boiling water shrinkage (60±5%), creating a soft, velvety feel while avoiding excessive wrinkling. The introduction of ester / nitrogen-containing heterocyclic bifunctionalized nano-titanium dioxide synergizes with water-soluble copper salts to create a coordination-enhancing effect, improving the blended yarn's breaking strength and abrasion resistance. The resulting fabric exhibits reduced warp shrinkage fluctuations after high-temperature dyeing, achieving a surface smoothness rating of Class 4 (AATCC 124), and its comprehensive performance meets the requirements of high-end home textile fabrics. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the production process of the soft velvety polyester blended yarn of this application.

[0037] Description of reference numerals:

[0038] 1. FDY metering pump; 2. POY metering pump; 3. Spinning assembly; 4. Bellows; 5. Oiling device; 6. Godet GR0; 7. Five-roller hot roller box; 8. Godet GR1; 9. Pre-netter; 10. Godet GR2; 11. Main netter; 12. Godet GR3; 13. Winding machine. DETAILED DESCRIPTION

[0039] The polyester melt used in the following examples and comparative examples has an intrinsic viscosity of 0.640 dL / g, a terminal carboxyl group value of 44 mol / t, and a melting point of 254°C.

[0040] Preparation Example 1: Modified nano-titanium dioxide was prepared as follows:

[0041] 1 kg of nano-titanium dioxide (D50 = 200 nm) was dispersed in ethanol, and 0.15 kg of methacryloxypropyltrimethoxysilane was added. The mixture was refluxed at 80°C for 2 hours and centrifuged to obtain silanized TiO2. This mixture was then mixed with 0.9 kg of methyl methacrylate and 0.3 kg of vinylimidazole. 0.15 kg of a water / ethanol mixture containing 20 wt% ammonium persulfate (volume ratio 1:1) was added, and the mixture was reacted at 75°C under nitrogen for 5 hours. The product was washed with acetone and dried in vacuo to obtain modified nano-titanium dioxide with surface-grafted ester groups and nitrogen-containing heterocycles.

[0042] Preparation Example 2: Modified nano-titanium dioxide was prepared as follows:

[0043] 1 kg of nano-titanium dioxide (D50 = 100 nm) was dispersed in ethanol, and 0.25 kg of methacryloyloxyethyltrimethoxysilane was added. The mixture was refluxed at 80°C for 2 hours and centrifuged to obtain silanized TiO2. This mixture was then mixed with 1.2 kg of butyl methacrylate and 0.5 kg of allyl imidazole. 0.2 kg of a water / ethanol mixture containing 20 wt% benzoyl peroxide (volume ratio 1:1) was added, and the mixture was reacted at 80°C under nitrogen for 54 hours. The product was washed with acetone and dried in vacuo to obtain modified nano-titanium dioxide with surface-grafted ester groups and nitrogen-containing heterocycles.

[0044] Preparation Example 3: Modified nano-titanium dioxide was prepared as follows:

[0045] 1 kg of nano-titanium dioxide (D50 = 300 nm) was dispersed in ethanol, and 0.18 kg of methacryloxyphenyltrimethoxysilane was added. The mixture was refluxed at 80°C for 2 hours and centrifuged to obtain silanized TiO2. This mixture was then mixed with 1.0 kg of ethyl methacrylate and 0.4 kg of vinylpyridine. 0.25 kg of a water / ethanol mixture containing 10 wt% ammonium persulfate (volume ratio 1:1) was added, and the mixture was reacted at 82°C under nitrogen for 4 hours. The product was washed with acetone and dried in vacuo to obtain modified nano-titanium dioxide with surface-grafted ester groups and nitrogen-containing heterocycles.

[0046] Preparation Example 4, modified nano-titanium dioxide, differs from Preparation Example 1 in that vinyl imidazole is replaced by an equal amount of methyl methacrylate.

[0047] Preparation Example 5, modified nano-titanium dioxide, differs from Preparation Example 1 in that methyl methacrylate is replaced by an equal amount of vinylimidazole.

[0048] Example 1: A soft velvety polyester blended yarn is produced according to the following steps:

[0049] A polyester melt (containing 2.05 wt% of the modified nano-titanium dioxide from Preparation Example 1) was extruded from the spinneret of a spinning assembly (spinning manifold temperature 286-289°C) and cooled with annular airflow (air temperature 20±1°C, air velocity 28 pa) to form spun fibers. Half of the spun fibers produced at the spinning position were oiled and bundled using a diluent oil emulsion (25 wt% TK-1009 oil, 2.0 wt% emulsifier, 2.0 wt% copper sulfate, and the balance water, oil temperature 40°C). The resulting filaments passed through godet GR0 and then into a five-roll hot roll box for drafting and setting. The total draw ratio was 3.1, the drafting rollers HR1-HR3 were maintained at 85-87°C, and the setting rollers HR4-HR5 were maintained at 110±2°C. The resulting FDY yarn had a fineness of 60 dtex. The spun fibers produced at the other half of the spinning positions were oiled and bundled with diluent oil (TK-1009 oil 20wt%, fatty alcohol polyoxyethylene ether AEO-9 1.5wt%, copper sulfate 1.5wt%, water as the balance, oil temperature 40°C) to obtain POY yarns with a fineness of 75dtex.

[0050] The FDY yarns produced above passed through godet GR1 and into a pre-intertwining device with the POY yarns for primary intertwining and mixing (air pressure 0.2 MPa). The mixed fibers then passed through godet GR2 and into a primary intertwining device (air pressure 0.4 MPa) for secondary intertwining and mixing, resulting in a mixed fiber with 28 intertwining points per meter. The mixed fibers then passed through godet GR3 and into a winder (spinning speed 3400 m / min), producing a 135 dtex / 108F soft-velvet polyester blended yarn with a boiling water shrinkage of 60%.

[0051] Example 2: A soft velvety polyester blended yarn is produced according to the following steps:

[0052] A polyester melt (containing 1.6 wt% of the modified nano-titanium dioxide from Preparation Example 2) was extruded from the spinneret of a spinning assembly (spinning manifold temperature 285-287°C) and cooled with annular airflow (air temperature 23±1°C, air velocity 35 pa) to form spun fibers. Half of the spun fibers produced at the spinning position were oiled and bundled using a diluent oil emulsion (20 wt% TK-1009 oil, 2.0 wt% emulsifier, 1.5 wt% copper sulfate, and the balance water, oil temperature 40°C). The resulting filaments passed through godet GR0 and then into a five-roll hot roll box for drafting and setting. The total draw ratio was 3.4, the drafting rollers HR1-HR3 were maintained at 82-84°C, and the setting rollers HR4-HR5 were maintained at 108±2°C. The resulting FDY yarn had a fineness of 55 dtex. The spun fibers produced from the other half of the spinning positions were oiled and bundled with diluent oil (TK-1009 oil 20wt%, fatty alcohol polyoxyethylene ether AEO-9 1.5wt%, copper sulfate 1.0wt%, water as the balance, oil temperature 40°C) to obtain POY yarns with a fineness of 80 dtex.

[0053] The FDY yarns produced above passed through godet GR1 and into a pre-intertwining device with the POY yarns for primary intertwining and mixing (air pressure 0.3 MPa). The mixed fibers then passed through godet GR2 and into a primary intertwining device (air pressure 0.5 MPa) for secondary intertwining and mixing, resulting in a mixed fiber with 29 intertwining points per meter. The mixed fibers then passed through godet GR3 and into a winder (spinning speed 3100 m / min), producing a 135 dtex / 108F soft-feel polyester blend with a boiling water shrinkage of 64%.

[0054] Example 3: A soft velvety polyester blended yarn is produced according to the following steps:

[0055] A polyester melt (containing 2.5 wt% of the modified nano-titanium dioxide from Preparation Example 3) was extruded from the spinneret of a spinning assembly (spinning manifold temperature 286-289°C) and cooled with annular airflow (air temperature 20±1°C, air velocity 30 pa) to form spun fibers. Half of the spun fibers produced at the spinning position were oiled and bundled using a diluent oil emulsion (30 wt% TK-1009 oil, 2.5 wt% emulsifier, 3.0 wt% copper chloride, and the balance water, oil temperature 40°C). The resulting filaments passed through godet GR0 and then into a five-roll hot roll box for drafting and setting. The total draw ratio was 3.0, the drafting rollers HR1-HR3 were maintained at 85-87°C, and the setting rollers HR4-HR5 were maintained at 115±2°C. The resulting FDY yarn had a fineness of 65 dtex. The spun fibers produced at the other half of the spinning positions were oiled and bundled with diluent oil (TK-1009 oil 25wt%, fatty alcohol polyoxyethylene ether AEO-9 2.0wt%, copper chloride 2.5wt%, water as the balance, oil temperature 40°C) to obtain POY yarns with a fineness of 70 dtex.

[0056] The FDY yarns produced above passed through godet GR1 and into a pre-intertwining device with the POY yarns for primary intertwining and mixing (air pressure 0.1 MPa). The mixed fibers then passed through godet GR2 and into a primary intertwining device (air pressure 0.5 MPa) for secondary intertwining and mixing, resulting in a mixed fiber with 25 intertwining points per meter. The mixed fibers then passed through godet GR3 and into a winder (spinning speed 3400 m / min), producing a velvety polyester blended yarn with a 135 dtex / 108F diameter and a boiling water shrinkage of 56%.

[0057] Example 4 is a soft and plush polyester blended yarn. The difference from Example 1 is that the modified nano-titanium dioxide in Preparation Example 1 is replaced by an equal amount of modified nano-titanium dioxide in Preparation Example 4 in the polyester melt.

[0058] Example 5, a soft and plush polyester blended yarn, is different from Example 1 in that the modified nano-titanium dioxide in Preparation Example 1 is replaced by an equal amount of modified nano-titanium dioxide in Preparation Example 5 in the polyester melt.

[0059] Example 6, a soft and plush polyester blended yarn, is different from Example 1 and Preparation Example 1 in that copper sulfate is not added to the diluent oil of the FDY yarn and the POY yarn, and the amount of water used is increased accordingly.

[0060] Example 7, a soft and plush polyester blended yarn, is different from Example 4 and Preparation Example 1 in that copper sulfate is not added to the diluent oil of the FDY yarn and the POY yarn, and the amount of water used is increased accordingly.

[0061] Example 8, a soft and plush polyester blended yarn, is different from Example 1 and Preparation Example 1 in that modified nano-titanium dioxide is not added to the polyester melt.

[0062] Comparative Example 1 is a polyester blended yarn. The difference from Example 1 is that the decitex number of the spun fiber is controlled by a metering pump to obtain POY yarn with a fineness of 45 dtex and POY yarn with a fineness of 90 dtex, and a blended yarn with a boiling water shrinkage of 76% is prepared.

[0063] Comparative Example 2, a polyester blended yarn, differs from Example 1 in that the dtex of the spun fiber is controlled by a metering pump to obtain POY yarn with a fineness of 80 dtex and POY yarn with a fineness of 55 dtex, and a blended yarn with a boiling water shrinkage of 43.2% is obtained.

[0064] The performance results of the above embodiments and comparative examples are described below in conjunction with experiments.

[0065] 1. Boiling water shrinkage and network density test of mixed fiber yarn: The boiling water shrinkage shall be tested with reference to the provisions of FZ / T 54118-2019; the network density shall be tested in accordance with the provisions of FZ / T 50001-2016.

[0066] 2. Plush feeling test

[0067] Sample Preparation: Jacquard fabrics were made from the polyester blended yarns of the Examples and Comparative Examples. The fabrics adopted a plain weave structure with a warp and weft density of 120 × 80 yarns / cm². The jacquard fabrics were then dyed and set using disperse dyes, a bath ratio of 1:20, and a temperature of 130°C for 30 minutes. Setting conditions were 150°C for 30 seconds with an overfeed rate of 3%.

[0068] Hair feel test method: 10 trainees conduct a blind test (wearing eye masks) and score on a scale of 1-5 (1 point: smooth and velvety, 5 points: noticeably velvety), and the arithmetic mean is taken.

[0069] Smoothness test method: Refer to the fabric smoothness evaluation method in AATCC 124-2018 "Appearance Smoothness of Fabrics After Home Laundering" for rating, and rate on a scale of 1-5 (5 is the best). Rating results are allowed to be intermediate levels between two levels, such as 4.5 and 3.5.

[0070] 3. Test of mixed yarn strength performance

[0071] Sample: the polyester blended yarn obtained in the above examples and comparative examples.

[0072] (1) Breaking strength: Tested in accordance with the requirements of GB / T 14344-2008, with a clamp spacing of 500 mm and a tensile speed of 500 mm / min.

[0073] (2) Statistics of floating yarns and broken ends during the production process: Record the number of floating yarns and broken ends during 24 hours of continuous production at 108 spinning positions (times / day•108 positions).

[0074] Table 1. Performance test results

[0075]

[0076] Analysis of test results:

[0077] 1. Plush Fabric: Examples 1-3 controlled the POY / FDY fineness difference to 15-30 dtex and the boiling water shrinkage to 60±5%, resulting in jacquard fabrics with both a plush feel and smoothness rating greater than 4, meeting the requirements for a plush feel. However, in Comparative Example 1, the fineness difference was too high (45 dtex), resulting in excessive shrinkage and crimping (76%) in the blended fibers, resulting in a rough touch. In Comparative Example 2, the fineness was too low (25 dtex), resulting in an insufficient shrinkage and crimping structure (43.2%) in the blended fibers, resulting in a smooth touch but a poor plush feel, thus failing to meet the requirements for a plush fabric.

[0078] 2. Blended Fiber Strength Performance: Examples 1-3 used nano-TiO2 modified with ester groups and nitrogen-containing heterocycles, combined with copper salts in the oil, effectively reducing wear during processing, reducing drifting and broken ends, and thus improving the breaking strength of the polyester yarn. Example 4 did not graft amino groups onto the surface of the modified nano-TiO2, resulting in an inability to coordinate with the copper ions in the oil, and unable to effectively inhibit fiber damage caused by friction, resulting in reduced strength and increased drifting and broken ends. Example 5 did not graft ester groups onto the surface of the modified nano-TiO2, resulting in reduced compatibility of the nano-TiO2 with the polyester melt, easy agglomeration, increased frictional resistance, and caused drifting and broken ends.

[0079] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A method for producing a soft velvety polyester blended yarn, characterized in that: After the polyester melt is spun and cooled, spun fibers are obtained. The spun fibers are divided into two groups, and after oiling, FDY yarns and POY yarns are prepared respectively. The spun fibers are then mixed and wound to obtain mixed yarns. The fineness of the POY yarns in the mixed yarns is greater than that of the FDY yarns, and the difference is 15 to 30 dtex. The boiling water shrinkage of the mixed yarns is 60±5%. The polyester melt contains 1.5 to 2.5 wt% of modified nano-titanium dioxide, and the surface of the modified nano-titanium dioxide is grafted with ester groups. The raw materials of the modified nano-titanium dioxide include nano-titanium dioxide, methacryloxysiloxane, methacrylate, and an alkenyl compound with a nitrogen-containing heterocyclic ring in a mass ratio of 1:0.15 to 0.25:0.8 to 1.2:0.3 to 0.

5. The methacryloxysiloxane is used to modify the surface of the nano-titanium dioxide, and then a free radical copolymerization reaction is carried out with the methacrylate and the alkenyl compound with a nitrogen-containing heterocyclic ring.

2. The manufacturing method according to claim 1, characterized in that The specification of the mixed fiber yarn is 135dtex / 108F, wherein the fineness of the POY yarn is 70-80dtex, and the fineness of the FDY yarn is 50-65dtex.

3. The manufacturing method according to claim 1, characterized in that The oil content of the mixed yarn is 0.40±0.1%.

4. The manufacturing method according to claim 1, characterized in that The drawing temperature of the FDY yarn during drawing and setting is 82-88° C., the setting temperature is 105-120° C., and the stretching ratio after drawing and setting is 2.8-3.

3.

5. The manufacturing method according to claim 1, characterized in that The number of network points of the mixed fiber yarn is 25 to 30 per meter.

6. The manufacturing method according to claim 1, characterized in that The spinning speed of the mixed fiber yarn is 3000-4000 m / min, the spinning temperature is 285-290° C., the cooling air pressure is 30±10 Pa, and the air temperature is 20±5° C.

7. The manufacturing method according to claim 1, characterized in that The diluent oil for oiling contains 1 to 3 wt % of water-soluble copper salt.

8. A soft velvety polyester blended yarn, characterized in that: The invention is prepared by the method according to any one of claims 1 to 7.

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