A kind of super matte special-shaped colored polyester fiber and preparation method thereof

Abstract

The invention discloses an ultra-matte profiled colored polyester fiber and a preparation method thereof, belonging to the technical field of fiber materials. The technical scheme thereof mainly comprises an ultra-matte profiled colored polyester fiber, wherein the polyester fiber comprises the following raw materials in parts by weight: 50-90 parts of polyester chips, 20-50 parts of matting agent, 2-4 parts of calcium stearate, 3-6 parts of polyacrylamide, and 5-20 parts of modified masterbatch, so as to achieve the effect that the polyester fiber has both UV protection and oil resistance.

Description

Technical Field

[0001] The invention relates to the technical field of fiber materials, and in particular to an ultra-matte special-shaped colored polyester fiber and a preparation method thereof. Background Art

[0002] Polyester fiber, referred to as PET fiber, is a synthetic fiber formed by connecting the chain segments in the macromolecular chain through ester groups. In my country, fibers with a polyester fiber content greater than 85% are called polyester. Polyester is widely used in the field of clothing due to its high strength, good wear resistance, smooth surface, heat setting, stable physical and chemical properties, etc. As people put forward higher requirements for the comfort and beauty of clothing, on the basis of maintaining the excellent properties of polyester, further improving the moisture absorption and perspiration management, easy dyeing, coolness, UV resistance, oil resistance, flame retardancy and other properties of polyester fibers are currently the goals that polyester fiber manufacturers are striving to pursue.

[0003] The oil-proof performance of existing yarns is mainly achieved by covering the surface of the fabric woven from the yarn with a PU film, and the anti-ultraviolet effect is achieved by adding costly UV to the fiber, which not only increases the preparation cost of the fabric, but also makes the preparation process more complicated. Summary of the invention

[0004] In order to solve the problems in the prior art, the present invention provides an ultra-matte special-shaped colored polyester fiber and a preparation method thereof. Through the combination of the raw materials in the present application, the polyester fiber has both UV protection and oil resistance properties.

[0005] The first aspect provided by the present invention is to provide an ultra-matte special-shaped colored polyester fiber, which adopts the following technical scheme: an ultra-matte special-shaped colored polyester fiber, wherein the polyester fiber comprises the following raw materials in parts by weight: 50-90 parts of polyester chips, 20-50 parts of matting agent, 2-4 parts of calcium stearate, 3-6 parts of polyacrylamide, and 5-20 parts of modified masterbatch.

[0006] In a preferred embodiment, the polyester comprises 65-80 parts, the matting agent comprises 30-40 parts, the calcium stearate comprises 2.5-3.5 parts, the polyacrylamide comprises 4-5 parts, and the modified masterbatch comprises 10-15 parts.

[0007] In a preferred embodiment, the modified masterbatch is composed of the following raw materials in parts by weight: 0.1-1 part of dispersant, 0.1-1 part of antioxidant, 0.1-1 part of compatibilizer, 0.5-3 parts of pigment, and 90-95 parts of polyester.

[0008] In a preferred embodiment, the dispersant is a combination of one or more of polyacrylamide, vinyl bisstearamide, tristearic acid glyceryl, and sodium methylnaphthalene sulfonate.

[0009] In a preferred embodiment, the compatibilizer is a combination of one or more of methacrylate, polyethylene wax, calcium carbonate, and calcium stearate.

[0010] In a preferred embodiment, the modified masterbatch is obtained by the following preparation method: after the pigment and the compatibilizer are mixed evenly, a dispersant and an antioxidant are added and mixed evenly, and then the polyester is added and mixed evenly to obtain a mixture, and the mixture is extruded and drawn at 200-255°C, cooled and pelletized to obtain a masterbatch with a particle size of 1.6-2.7 mm.

[0011] In a preferred embodiment, the matting agent is one or more of titanium dioxide, silicon dioxide, and calcium carbonate.

[0012] The second aspect of the present invention is to provide a method for preparing the above-mentioned ultra-matte special-shaped colored polyester fiber, comprising the following preparation steps: S1. Dry the modified masterbatch and the matting agent at 130°C for 3 hours, and dry the polyester chips at 135°C for 4 hours; S2, the modified masterbatch, matting agent, polyester chips, calcium stearate and polyacrylamide dried in step S1 are mixed at 135° C. for 30 min, and then spun by melt spinning, melted at 280-288° C., the molten liquid is ejected from a special-shaped spinneret, and cooled to obtain a pre-oriented yarn of 100-150D; S3, preparing polyester fibers from pre-oriented yarns.

[0013] In a preferred embodiment, the special-shaped spinneret is one of a cross shape, a triangle shape, an octagon shape, an I-shape, and a circle shape.

[0014] In summary, the present invention has the following beneficial effects: In the present application, the addition of matting agent plays a dual role. First, it makes the polyester fiber have excellent matte performance. Compared with semi-matte polyester fiber, full matte polyester fiber has greater advantages in post-dyeing performance and cotton-type feeling, and its market application potential is very large. Moreover, the wool-like fabric obtained by blending full matte polyester fiber with wool, cotton, etc. has the characteristics of crispness, fullness, soft light feeling, and strong wool-type feeling of pure wool fabric, and the characteristics of durability, dimensional stability, easy washing and quick drying of chemical fiber fabric, which is very suitable for the needs of all consumer levels; secondly, after adding polyacrylamide to the polyester fiber in the present application, the combination between polyacrylamide and matting agent makes the polyester fiber have the performance of anti-ultraviolet and anti-oil pollution at the same time. In addition, the addition of calcium stearate in the present application can not only improve the dispersion effect of modified masterbatch, but also the inventors have found that the addition of calcium stearate solves the problem of high hair rate when using special-shaped spinnerets, and improves the production quality of polyester fiber.

[0015] The present application improves the dispersibility of the masterbatch in the polyester chips by modifying the masterbatch, thereby ensuring the uniformity of the color of the polyester fiber. At the same time, after the masterbatch is modified, the masterbatch can be dispersed more evenly in the polyester chips, so that the color of the finally obtained colored polyester fiber is brighter, thereby improving the coloring ability and coloring effect of the masterbatch on the polyester fiber. In addition, a large amount of polyester is added to the masterbatch during the modification. The polyester is added as a carrier, which has a good wetting and dispersing effect on the pigment, and the modified masterbatch has good compatibility with the polyester chips. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below with reference to the embodiments.

[0017] Disclosed is an ultra-matte special-shaped colored polyester fiber, which comprises the following raw materials in parts by weight: 50-90 parts of polyester chips, 20-50 parts of matting agents, 2-4 parts of calcium stearate, 3-6 parts of polyacrylamide, and 5-20 parts of modified masterbatch.

[0018] In a preferred embodiment, the polyester comprises 65-80 parts, the matting agent comprises 30-40 parts, the calcium stearate comprises 2.5-3.5 parts, the polyacrylamide comprises 4-5 parts, and the modified masterbatch comprises 10-15 parts.

[0019] In a preferred embodiment, the modified masterbatch is composed of the following raw materials in parts by weight: 0.1-1 part of dispersant, 0.1-1 part of antioxidant, 0.1-1 part of compatibilizer, 0.5-3 parts of pigment, and 90-95 parts of polyester.

[0020] In a preferred embodiment, the dispersant is a combination of one or more of polyacrylamide, vinyl bisstearamide, tristearic acid glyceryl, and sodium methylnaphthalene sulfonate.

[0021] In a preferred embodiment, the compatibilizer is a combination of one or more of methacrylate, polyethylene wax, calcium carbonate, and calcium stearate.

[0022] In a preferred embodiment, the modified masterbatch is obtained by the following preparation method: after the pigment and the compatibilizer are mixed evenly, a dispersant and an antioxidant are added and mixed evenly, and then the polyester is added and mixed evenly to obtain a mixture, and the mixture is extruded and drawn at 200-255°C, cooled and pelletized to obtain a masterbatch with a particle size of 1.6-2.7 mm.

[0023] In a preferred embodiment, the matting agent is one or more of titanium dioxide, silicon dioxide, and calcium carbonate.

[0024] In a preferred embodiment, the pigment is one of pink, green, yellow, blue, black, etc., and can be either an inorganic pigment or an organic pigment. In the embodiment of the present application, the pigment is an inorganic yellow pigment.

[0025] A method for preparing ultra-matte special-shaped colored polyester fiber, comprising the following preparation steps: S1. Dry the modified masterbatch and the matting agent at 130°C for 3 hours, and dry the polyester chips at 135°C for 4 hours; S2, the modified masterbatch, matting agent, polyester chips, calcium stearate and polyacrylamide dried in step S1 are mixed at 135° C. for 30 min, and then spun by melt spinning, melted at 280-288° C., the molten liquid is ejected from a special-shaped spinneret, and cooled to obtain a pre-oriented yarn of 100-150D; S3, preparing polyester fibers from pre-oriented yarns.

[0026] In a preferred embodiment, the special-shaped spinneret is one of a cross shape, a triangle shape, an octagon shape, an I-shape, and a circle shape.

[0027] The raw materials used in this application are all commercially available.

[0028] Preparation Example 1 A method for preparing a modified masterbatch comprises the following steps: After 0.05kg of pigment and 0.01kg of methacrylate are mixed evenly, 0.01kg of dispersant vinyl bisstearamide and 0.01kg of antioxidant 1010 are added and mixed evenly, and then 9kg of polyester PBT is added and mixed evenly to obtain a mixture, which is extruded into a twin-screw extruder. The temperature of the extrusion zones 1, 2 and 3 is 210±5°C, the temperature of the zones 4, 5 and 6 is 235±5°C, and the temperature of the zones 7, 8, 9 and 10 is 250±5°C. After extrusion, the mixture is drawn into strips, cooled and pelletized to obtain a masterbatch with a particle size of 1.6mm.

[0029] Preparation Example 2 A method for preparing a modified masterbatch comprises the following steps: After 0.18kg of pigment and 0.06kg of methacrylate are mixed evenly, 0.05kg of dispersant vinyl bisstearamide and 0.06kg of antioxidant 1010 are added and mixed evenly, and then 9kg of polyester PBT is added and mixed evenly to obtain a mixture, which is extruded into a twin-screw extruder. The temperature of the extrusion zones 1, 2 and 3 is 210±5°C, the temperature of the zones 4, 5 and 6 is 235±5°C, and the temperature of the zones 7, 8, 9 and 10 is 250±5°C. After extrusion, the mixture is drawn into strips, cooled and pelletized to obtain a masterbatch with a particle size of 1.6mm.

[0030] Preparation Example 3 A method for preparing a modified masterbatch comprises the following steps: After 0.3kg of pigment and 0.1kg of methacrylate are mixed evenly, 0.1kg of dispersant vinyl bisstearamide and 0.1kg of antioxidant 1010 are added and mixed evenly, and then 9.5kg of polyester PBT is added and mixed evenly to obtain a mixture, which is extruded into a twin-screw extruder. The temperature of the extrusion zones 1, 2 and 3 is 210±5°C, the temperature of the zones 4, 5 and 6 is 235±5°C, and the temperature of the zones 7, 8, 9 and 10 is 250±5°C. After extrusion, the mixture is drawn into strips, cooled and pelletized to obtain a masterbatch with a particle size of 1.6mm.

[0031] Preparation Example 4 A method for preparing a modified masterbatch comprises the following steps: After uniformly mixing 0.18 kg of pigment and 0.06 kg of calcium stearate, add 0.05 kg of dispersant polyacrylamide and 0.06 kg of antioxidant 1010 and mix evenly, then add 9 kg of polyester PBT and mix evenly to obtain a mixture, which is extruded into a twin-screw extruder. The temperature of the extrusion zones 1, 2 and 3 is 210 ± 5 °C, the temperature of the zones 4, 5 and 6 is 235 ± 5 °C, and the temperature of the zones 7, 8, 9 and 10 is 250 ± 5 °C. After extrusion, the mixture is drawn into strips, cooled and pelletized to obtain a masterbatch with a particle size of 1.6 mm.

[0032] Preparation Example 5 A method for preparing a modified masterbatch comprises the following steps: After 0.18kg of pigment and 0.06kg of polyethylene wax are mixed evenly, 0.05kg of dispersant tristearate glyceryl and 0.06kg of antioxidant 1010 are added and mixed evenly, and then 9kg of polyester PBT is added and mixed evenly to obtain a mixture, which is extruded into a twin-screw extruder. The temperature of the extrusion zones 1, 2 and 3 is 210±5°C, the temperature of the zones 4, 5 and 6 is 235±5°C, and the temperature of the zones 7, 8, 9 and 10 is 250±5°C. After extrusion, the mixture is drawn into strips, cooled and pelletized to obtain a masterbatch with a particle size of 1.6mm.

[0033] Preparation Example 6 A method for preparing a modified masterbatch comprises the following steps: After uniformly mixing 0.18 kg of pigment and 0.06 kg of calcium carbonate, 0.05 kg of dispersant sodium methyl naphthalene sulfonate and 0.06 kg of antioxidant 1010 were added and mixed evenly, and then 9 kg of polyester PBT was added and mixed evenly to obtain a mixture, which was extruded into a twin-screw extruder. The temperature of the extrusion zones 1, 2 and 3 was 210 ± 5 °C, the temperature of the zones 4, 5 and 6 was 235 ± 5 °C, and the temperature of the zones 7, 8, 9 and 10 was 250 ± 5 °C. After extrusion, the mixture was drawn into strips, cooled and pelletized to obtain a masterbatch with a particle size of 1.6 mm.

[0034] Preparation Example 7 A method for preparing a modified masterbatch, wherein an equal amount of epoxy resin is used to replace methacrylate, an equal amount of sodium dodecyl sulfate is used to replace vinyl bisstearamide, and the rest are the same as those in Preparation Example 2.

[0035] Example 1 A method for preparing super matte special-shaped colored polyester fiber comprises the following preparation steps: S1, 0.5 kg of the modified masterbatch obtained in Preparation Example 1 and 2 kg of the matting agent titanium dioxide were dried at 130 ° C for 3 hours for later use, and 5 kg of PBT polyester chips were dried at 135 ° C for 4 hours for later use; S2, the modified masterbatch dried in step S1, the matting agent, the polyester chips, 0.2kg calcium stearate, and 0.3kg polyacrylamide are mixed at 135°C for 30min, and then spun by melt spinning. The main process parameters of spinning are melting at 280-288°C, the side blowing cooling temperature is 25°C, the side blowing wind speed is 0.65m / s, the winding spinning speed is 3200m / min, and the molten liquid is ejected from the special-shaped spinneret and cooled to obtain 100-150D pre-oriented yarn; S3. The pre-oriented yarn is hung according to the requirements of Z twist and S twist, passed through the first roller and entered into the first hot box, stretched and deformed at 195°C, and then cooled through the cooling plate to make the yarn have sufficient rigidity. After passing through the false twister and the second roller, it is pre-networked through the network nozzle under the action of air pressure, entered into the second hot box, shrunk and shaped at 165°C, wound onto the oil tanker through the third roller, and then the oil tanker rolls and oils the network yarn, and then winds and forms it to obtain polyester fiber.

[0036] Example 2 A method for preparing super matte special-shaped colored polyester fiber comprises the following preparation steps: S1, 1kg of the modified masterbatch obtained in Preparation Example 1 and 3kg of the matting agent titanium dioxide were dried at 130°C for 3h for later use, and 6.5kg of PBT polyester chips were dried at 135°C for 4h for later use; S2, the modified masterbatch dried in step S1, the matting agent, the polyester chips, 0.25kg calcium stearate, and 0.4kg polyacrylamide are mixed at 135°C for 30min, and then spun by melt spinning. The main process parameters of spinning are melting at 280-288°C, the side blowing cooling temperature is 25°C, the side blowing wind speed is 0.65m / s, the winding spinning speed is 3200m / min, and the molten liquid is ejected from the special-shaped spinneret and cooled to obtain 100-150D pre-oriented yarn; S3. The pre-oriented yarn is hung according to the requirements of Z twist and S twist, passed through the first roller and entered into the first hot box, stretched and deformed at 195°C, and then cooled through the cooling plate to make the yarn have sufficient rigidity. After passing through the false twister and the second roller, it is pre-networked through the network nozzle under the action of air pressure, entered into the second hot box, shrunk and shaped at 165°C, wound onto the oil tanker through the third roller, and then the oil tanker rolls and oils the network yarn, and then winds and forms it to obtain polyester fiber.

[0037] Example 3 A method for preparing super matte special-shaped colored polyester fiber comprises the following preparation steps: S1, 1.5 kg of the modified masterbatch obtained in Preparation Example 1 and 4 kg of the matting agent titanium dioxide were dried at 130 ° C for 3 h for later use, and 8 g of PBT polyester chips were dried at 135 ° C for 4 h for later use; S2, the modified masterbatch dried in step S1, the matting agent, the polyester chips, 0.35kg calcium stearate, and 0.5kg polyacrylamide are mixed at 135°C for 30min, and then spun by melt spinning. The main process parameters of spinning are melting at 280-288°C, the side blowing cooling temperature is 25°C, the side blowing wind speed is 0.65m / s, the winding spinning speed is 3200m / min, and the molten liquid is ejected from the special-shaped spinneret and cooled to obtain 100-150D pre-oriented yarn; S3. The pre-oriented yarn is hung according to the requirements of Z twist and S twist, passed through the first roller and entered into the first hot box, stretched and deformed at 195°C, and then cooled through the cooling plate to make the yarn have sufficient rigidity. After passing through the false twister and the second roller, it is pre-networked through the network nozzle under the action of air pressure, entered into the second hot box, shrunk and shaped at 165°C, wound onto the oil tanker through the third roller, and then the oil tanker rolls and oils the network yarn, and then winds and forms it to obtain polyester fiber.

[0038] Example 4 A method for preparing super matte special-shaped colored polyester fiber comprises the following preparation steps: S1, 2kg of the modified masterbatch obtained in Preparation Example 1 and 5kg of the matting agent titanium dioxide were dried at 130°C for 3h for later use, and 9g of PBT polyester chips were dried at 135°C for 4h for later use; S2, the modified masterbatch dried in step S1, the matting agent, the polyester chips, 0.4kg calcium stearate, and 0.6kg polyacrylamide are mixed at 135°C for 30min, and then spun by melt spinning. The main process parameters of spinning are melting at 280-288°C, the side blowing cooling temperature is 25°C, the side blowing wind speed is 0.65m / s, the winding spinning speed is 3200m / min, and the molten liquid is ejected from the special-shaped spinneret and cooled to obtain 100-150D pre-oriented yarn; S3. The pre-oriented yarn is hung according to the requirements of Z twist and S twist, passed through the first roller and entered into the first hot box, stretched and deformed at 195°C, and then cooled through the cooling plate to make the yarn have sufficient rigidity. After passing through the false twister and the second roller, it is pre-networked through the network nozzle under the action of air pressure, entered into the second hot box, shrunk and shaped at 165°C, wound onto the oil tanker through the third roller, and then the oil tanker rolls and oils the network yarn, and then winds and forms it to obtain polyester fiber.

[0039] Example 5 A method for preparing ultra-matte special-shaped colored polyester fiber, which is different from Example 3 in that the modified masterbatch uses the modified masterbatch obtained in Preparation Example 2, and the rest is the same as Example 3.

[0040] Example 6 A method for preparing ultra-matte special-shaped colored polyester fiber, which is different from Example 3 in that the modified masterbatch adopts the modified masterbatch obtained in Preparation Example 3, and the rest is the same as Example 3.

[0041] Example 7 A method for preparing ultra-matte special-shaped colored polyester fiber, which is different from Example 3 in that the modified masterbatch uses the modified masterbatch obtained in Preparation Example 4, and the rest is the same as Example 3.

[0042] Example 8 A method for preparing super matte special-shaped colored polyester fiber, which is different from Example 3 in that the modified masterbatch uses the modified masterbatch obtained in Preparation Example 5, and the rest is the same as Example 3.

[0043] Example 9 A method for preparing ultra-matte special-shaped colored polyester fiber, which is different from Example 3 in that the modified masterbatch uses the modified masterbatch obtained in Preparation Example 6, and the rest is the same as Example 3.

[0044] Example 10 A method for preparing ultra-matte special-shaped colored polyester fiber, which is different from Example 3 in that the modified masterbatch uses the modified masterbatch obtained in Preparation Example 7, and the rest is the same as Example 3.

[0045] Comparative Example 1 A method for preparing super matte special-shaped colored polyester fiber, which is different from Example 3 in that calcium stearate is missing from the raw materials, and the rest is the same as Example 3.

[0046] Comparative Example 2 A method for preparing super matte special-shaped colored polyester fiber, which is different from Example 3 in that polyacrylamide is missing from the raw materials, and the rest is the same as Example 3.

[0047] Comparative Example 3 A method for preparing super matte special-shaped colored polyester fiber, which is different from Example 3 in that calcium stearate and polyacrylamide are missing from the raw materials, and the rest are the same as Example 3.

[0048] Performance Testing The polyester fibers obtained in the above examples and comparative examples were tested for breaking strength, breaking elongation, UV resistance, oil resistance and lint rate. The test results are shown in Table 1.

[0049] The index of anti-ultraviolet detection is UPF, which is a level for evaluating the protection of clothing and other textiles against ultraviolet B (UV-B). The higher the UPF label value, the stronger the protection of the clothing. Usually the UPF level is between 15 and 50+, among which UPF50+ indicates the strongest protection against UV-B. The test method for anti-oil performance is based on the method in AATCC-118, oil number 1-8, first starting from the lowest oil number, use a dropper to absorb the oil and drop a drop of 5mm in diameter or 5ml in volume on 5 positions of the sample. After 30 seconds, observe the shape of the oil drop at a 45° angle. The same situation of more than 3 drops shall prevail, and the samples in AATCC-118 shall be graded, among which A is qualified, the liquid is clear and round, B is qualified, the liquid is round and partially loses its gloss, C is unqualified, and obvious wetting or infiltration occurs; D is unqualified and all infiltration occurs.

[0050] Table 1 Polyester fiber performance test results From the table above we can see that: The polyester fibers obtained in Examples 1-4 of the present application have good breaking strength, breaking elongation and oil resistance. At the same time, as the content of each raw material increases, the hair rate gradually decreases and the anti-ultraviolet performance increases, indicating that the formula of the present application can make the polyester fiber have good oil resistance and anti-ultraviolet effects.

[0051] Compared with Example 3, when the modified masterbatch is the modified masterbatch obtained in Preparation Example 2-3, the various properties of the polyester fiber obtained in Example 5-6 are basically close to those in Example 3, indicating that the modified masterbatch obtained in Preparation Example 2-3 can effectively guarantee the various properties of the polyester fiber.

[0052] Compared with Example 3, when the compatibilizer and dispersant are changed in the preparation of the modified masterbatch, the breaking strength and elongation at break of the polyester fiber obtained in Example 7 are increased, and the fuzziness rate is further reduced, while the breaking strength and elongation at break of the polyester fiber obtained in Examples 8-9 are reduced, and the fuzziness rate is increased. It can be seen that when calcium stearate is used as the compatibilizer and polyacrylamide is used as the dispersant, the tensile properties and production quality of the polyester fiber can be further improved.

[0053] Compared with Example 3, when the compatibilizer and dispersant in the preparation of the modified masterbatch do not use the compatibilizer and dispersant specified in the present application, the tensile properties of the polyester fiber obtained in Example 10 are reduced, the lint rate is increased, and the anti-oil performance is also reduced. It can be seen that the combined use of the compatibilizer and dispersant in the present application can effectively ensure the tensile properties and product quality of the polyester fiber.

[0054] Compared with Example 3, when calcium stearate or polyacrylamide or both substances are lacking in the raw materials, the various properties of the polyester fibers obtained in Comparative Examples 1-3 are significantly reduced compared with those in Example 3. It can be seen that the combined use of the raw materials in the present application effectively guarantees the various properties of the polyester fibers.

[0055] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultra-matte special-shaped colored polyester fiber, characterized in that: The polyester fiber comprises the following raw materials in parts by weight: 50-90 parts of polyester chips, 20-50 parts of matting agent, 2-4 parts of calcium stearate, 3-6 parts of polyacrylamide, and 5-20 parts of modified masterbatch.

2. The super matte special-shaped colored polyester fiber according to claim 1, characterized in that: The polyester is 65-80 parts, the matting agent is 30-40 parts, the calcium stearate is 2.5-3.5 parts, the polyacrylamide is 4-5 parts, and the modified masterbatch is 10-15 parts.

3. The super matte special-shaped colored polyester fiber according to claim 1, characterized in that: The modified masterbatch is composed of the following raw materials in parts by weight: 0.1-1 part of a dispersant, 0.1-1 part of an antioxidant, 0.1-1 part of a compatibilizer, 0.5-3 parts of a pigment, and 90-95 parts of a polyester.

4. The super matte special-shaped colored polyester fiber according to claim 3, characterized in that: The dispersant is a combination of one or more of polyacrylamide, vinyl bisstearamide, tristearate glyceryl, and sodium methylnaphthalene sulfonate.

5. The super matte special-shaped colored polyester fiber according to claim 3, characterized in that: The compatibilizer is a combination of one or more of methacrylate, polyethylene wax, calcium carbonate and calcium stearate.

6. The super matte special-shaped colored polyester fiber according to claim 3, characterized in that: The modified masterbatch is obtained by the following preparation method: after the pigment and the compatibilizer are mixed evenly, a dispersant and an antioxidant are added and mixed evenly, and then the polyester is added and mixed evenly to obtain a mixture, and the mixture is extruded and drawn at 200-255° C., cooled and pelletized to obtain a masterbatch with a particle size of 1.6-2.7 mm.

7. The super matte special-shaped colored polyester fiber according to claim 1, characterized in that: The matting agent is one or more of titanium dioxide, silicon dioxide and calcium carbonate.

8. A method for preparing the ultra-matte special-shaped colored polyester fiber according to any one of claims 1 to 7, characterized in that: The method comprises the following preparation steps: S1. Dry the modified masterbatch and the matting agent at 130°C for 3 hours, and dry the polyester chips at 135°C for 4 hours; S2, the modified masterbatch, matting agent, polyester chips, calcium stearate and polyacrylamide dried in step S1 are mixed at 135° C. for 30 min, and then spun by melt spinning, melted at 280-288° C., the molten liquid is ejected from a special-shaped spinneret, and cooled to obtain a pre-oriented yarn of 100-150D; S3, preparing polyester fibers from pre-oriented yarns.

9. The method for preparing super matte special-shaped colored polyester fiber according to claim 8, characterized in that: The special-shaped spinneret is one of a cross shape, a triangle shape, an octagon shape, an I shape and a circle shape.

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