Elastic cool color cool silk soft polyester material and preparation method thereof

Abstract

The application belongs to the technical field of textile fabrics, and specifically provides a polyester material for elastic cool color cool silk and a preparation method thereof.The polyester material contains the following raw materials in parts by weight: polyester chip 100 parts, color master batch 5-10 parts, antioxidant 1-3 parts, functional filler 1-5 parts, and coupling agent 1-3 parts.The polyester material has excellent moisture permeability and quick drying property, and has a wide application prospect.

Description

Technical Field

[0001] This invention belongs to the field of textile fabric technology, specifically relating to a polyester material for elastic, colorful, and silky cotton and its preparation method. Background Technology

[0002] Polyester, a major type of synthetic fiber, scientifically known as polyethylene terephthalate (PET) fiber, has rapidly developed into the world's largest-produced and most widely used synthetic fiber since its industrial production began in the 1940s, thanks to the excellent properties conferred by its molecular chain structure. Statistics show that polyester accounts for more than 60% of global synthetic fiber production.

[0003] However, polyester fiber has inherent performance defects. The polyester molecular chain is composed of benzene rings and methylene groups, with a regular structure and low polarity. It lacks hydrophilic groups such as hydroxyl and amino groups, making it difficult to form hydrogen bonds with water molecules, resulting in extremely poor moisture absorption. Under standard conditions (20℃, 65% relative humidity), the moisture regain of polyester is only about 0.4%, far lower than cotton's 8.5% and wool's approximately 15%. This characteristic means that polyester products cannot effectively absorb and diffuse sweat from the skin's surface during wear, especially during exercise or in high-temperature environments. Sweat accumulates between the skin and the fabric, leading to a stuffy and sticky feeling, severely limiting its expansion in high-end applications such as intimate apparel and sportswear. Besides its insufficient moisture-wicking properties, the rigidity and aggregated structure of polyester molecules also cause a significant difference in feel compared to natural fibers. Conventional polyester fibers have a round cross-section and a smooth surface, resulting in a stiff feel and a harsh luster, lacking the fluffy and soft touch of cotton fibers' natural twisted structure. Meanwhile, the lack of active groups in polyester molecular chains makes dyeing difficult, typically requiring the use of disperse dyes under high temperature and pressure conditions, and color fastness issues are frequent. Furthermore, although polyester itself has a certain degree of elastic recovery, it is still prone to plastic deformation after repeated stretching or prolonged wear; the elastic recovery performance of ordinary polyester is insufficient to meet the demands of highly elastic clothing. Simultaneously, with consumers' increasing demands for textile comfort and the rise of the athleisure trend, the market demand for composite functional materials that combine the advantages of polyester with the comfort of natural fibers is becoming increasingly urgent.

[0004] Invention patent CN117535820B discloses a moisture-absorbing ultrafine polyester fiber, comprising the following components: 100 parts PET polyester chips; 10-15 parts color masterbatch; 2-5 parts antioxidant; 3-5 parts multifunctional modifier; and 1-2 parts coupling agent. The multifunctional modifier is a product obtained by thermal condensation reaction of the amino group of tetra-arm polyethylene glycol amino with the carboxyl group of graphene oxide and carboxyl silicone oil. However, although the graphene oxide used in the functional modifier improves the moisture absorption of the polyester fiber, it may affect the color and thus limit its applicability. Summary of the Invention

[0005] To address the existing technical problems, the present invention aims to provide a polyester material for elastic, colorful, and breathable fabrics and its preparation method. The polyester material of the present invention exhibits excellent moisture permeability and quick-drying properties, and has broad application prospects.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention provides a polyester material for elastic cool color cool silk cotton, which, by weight, comprises the following raw materials: 100 parts polyester chips, 5-10 parts color masterbatch, 1-3 parts antioxidant, 1-5 parts functional filler and 1-3 parts coupling agent.

[0007] In some embodiments of the present invention, the moisture content of the polyester chips is ≤40ppm.

[0008] In some embodiments of the present invention, the color masterbatch is a mixture of matrix powder, colorant and toughening agent, with a mass ratio of 70:(10-30):(5-10).

[0009] In some embodiments of the present invention, the matrix powder is polyester powder.

[0010] In some embodiments of the present invention, the colorant is one of phthalocyanine blue pigment, titanium dioxide, ultramarine, cobalt blue, and chrome yellow.

[0011] In some embodiments of the present invention, the toughening agent is an ethylene-propylene copolymer.

[0012] In some embodiments of the present invention, the preparation steps of the color masterbatch are as follows: Colorant, matrix powder and toughening agent are added in sequence and mixed at high speed for 10-30 minutes to obtain a mixture. The mixture is then melt-blended in a twin-screw extruder, cooled with water and granulated to obtain the color masterbatch.

[0013] In some embodiments of the present invention, the antioxidant is at least one of antioxidant 1076, antioxidant 1010 and antioxidant 264.

[0014] In some embodiments of the present invention, the preparation steps of the functional filler are as follows: (1) Mix titanium dioxide and anhydrous ethanol evenly, then add γ-aminopropylmethyldimethoxysilane, stir at 55-70℃ for 1-3 hours, and then centrifuge, wash and dry to obtain pretreated titanium dioxide. (2) The pretreated titanium dioxide from step (1) and polyethylene glycol monomethyl ether are mixed, a catalyst is added, and the mixture is heated to 110-120℃ under an inert atmosphere for 3-6 hours. After cooling to room temperature, it is separated by centrifugation, washed and dried to obtain secondary modified titanium dioxide. (3) Mix the secondary modified titanium dioxide from step (2) with deionized water, add sodium 3-chloro-2-hydroxypropanesulfonate, adjust the pH to 8-9, react at 70-85℃ for 3-5 hours, and obtain the functional filler by centrifugation, washing and drying.

[0015] In some embodiments of the present invention, in step (1), the mass ratio of the titanium dioxide and γ-aminopropylmethyldimethoxysilane is 1:(0.1-0.2).

[0016] In some embodiments of the present invention, in step (1), the particle size of the titanium dioxide is 30-50 nm.

[0017] In some embodiments of the present invention, in step (2), the mass ratio of the pretreated titanium dioxide and polyethylene glycol monomethyl ether is 1:(4-6).

[0018] In some embodiments of the present invention, in step (2), the number average molecular weight of the polyethylene glycol monomethyl ether is 1000-2000.

[0019] In some embodiments of the present invention, in step (3), the mass ratio of the secondary modified titanium dioxide and sodium 3-chloro-2-hydroxypropanesulfonate is 1:(0.5-1.2).

[0020] This invention effectively improves the moisture permeability and quick-drying properties of polyester materials through chemical modification of nano-titanium dioxide and multiple synergistic effects. Specifically, the applicant first modified titanium dioxide with γ-aminopropylmethyldimethoxysilane, then grafted long chains of polyethylene glycol monomethyl ether and introduced sulfonic acid groups to obtain a functional filler with excellent applicability. At this point, the siloxane segments bonded to the surface of titanium dioxide possess both hydrophobicity and flexibility. On the one hand, this significantly reduces the interfacial tension between the inorganic filler and the polyester matrix, allowing the filler to be uniformly dispersed in the polyester melt system, avoiding processing defects and mechanical property degradation caused by agglomeration. On the other hand, this flexible segment acts as a buffer between rigid particles and polyester molecular chains, effectively alleviating the impact of the inorganic filler on the molecular structure. The physical constraint of chain motion allows the fiber's elastic recovery rate to be well maintained while adding fillers to improve hydrophilicity, overcoming the technical resistance of conventional inorganic fillers that damage elasticity. Furthermore, the hydrophilic flexible segments rich in ether bonds introduced on the surface of the functional filler not only endow the filler with excellent hydrophilic properties, but also construct continuous water molecule transfer channels inside the fiber, enabling liquid water to be quickly adsorbed and spread on the fiber surface, laying the foundation for improving moisture permeability and quick-drying performance. The applicant also found that sulfonic acid groups also improve the moisture absorption rate of the system to a certain extent, playing a synergistic role.

[0021] In some embodiments of the present invention, the coupling agent is at least one of a silane coupling agent, an aluminate coupling agent, and a titanate coupling agent.

[0022] A second aspect of the present invention also provides a method for preparing a polyester material for elastic, colorful, and silky fabric, comprising the following steps: The functional filler and coupling agent are mixed and pretreated in a high-speed mixer at 80-100℃ for 10-20 minutes. Then, polyester chips, color masterbatch and antioxidant are added and mixed. The mixture is then transferred to a screw extruder and subjected to melt spinning, ring blowing, bundling and oiling, and stretching to obtain the elastic cool color cool silk cotton polyester material.

[0023] In some embodiments of the present invention, the temperature of the melt blending is 260-280°C.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The polyester material of the present invention has excellent moisture permeability and quick-drying properties, and has broad application prospects.

[0025] 2. This invention first modifies titanium dioxide with γ-aminopropylmethyldimethoxysilane, then grafts polyethylene glycol monomethyl ether long chains and introduces sulfonic acid groups to prepare functional fillers. Through multiple synergistic effects, the moisture permeability and quick-drying properties of polyester materials are effectively improved. Detailed Implementation

[0026] The present invention will be described below with reference to specific embodiments. It should be noted that the following embodiments are examples of the present invention and are used only to illustrate the invention, not to limit it. Other combinations and various modifications within the scope of the present invention can be made without departing from its spirit or scope.

[0027] To facilitate the implementation of this invention by those skilled in the art, the sources of some raw materials in the specific embodiments are described as follows: the particle size of the titanium dioxide used is 20-30nm; the polyester chips used are all CH-610 with a water content ≤40ppm, purchased from Far Eastern Textile Industry (Shanghai) Co., Ltd.; the antioxidants used are all antioxidant 1010; and the coupling agents used are all γ-methacryloyloxypropyltrimethoxysilane.

[0028] Unless otherwise specified, all other raw materials can be purchased from the market.

[0029] Unless otherwise specified, the post-processing steps such as "water cooling", "granulation", "mixing", "centrifugal separation", "washing" and "drying" in the following specific embodiments are routine operations for those skilled in the art, and can be selected according to actual operation.

[0030] Preparation Example 1 The masterbatch consists of a base powder (polyester powder, moisture content ≤60ppm, intrinsic viscosity 0.65dL / g), a colorant (titanium dioxide), and a toughening agent (ethylene-propylene copolymer, melt index (190°C, 2.16 kg) of 6000g / 10min, ethylene content 15wt%, density 0.861g / cm³). 3 A mixture of three substances (with a Vicat softening point of 48°C) in a mass ratio of 70:20:8; The preparation steps of color masterbatch are as follows: Colorant, matrix powder and toughening agent are added in sequence and mixed for 20 minutes under high-speed stirring at 1500 r / min to obtain a mixture. The mixture is then melt-blended in a twin-screw extruder, cooled with water and granulated to obtain the color masterbatch. The processing temperature is 280℃ and the screw speed is 200 r / min.

[0031] Preparation Example 2 The preparation steps of functional fillers are as follows: (1) Mix 20g of titanium dioxide and 200mL of anhydrous ethanol evenly, then add 3g of γ-aminopropylmethyldimethoxysilane, stir at 60℃ for 2h, centrifuge, wash 3 times with anhydrous ethanol and dry to obtain pretreated titanium dioxide. (2) Mix 5g of pretreated titanium dioxide from step (1) with 25g of polyethylene glycol monomethyl ether (number average molecular weight of 1500), add 0.1g of p-toluenesulfonic acid, heat to 115℃ under nitrogen atmosphere and react for 5h, cool to room temperature, centrifuge, wash three times with anhydrous ethanol and dry to obtain secondary modified titanium dioxide. (3) Mix 5g of the secondary modified titanium dioxide from step (2) with 150mL of deionized water, add 4g of sodium 3-chloro-2-hydroxypropanesulfonate, adjust the pH to 8-9 with 10wt% sodium hydroxide solution, react at 80℃ for 4h, and then centrifuge, wash with deionized water until neutral and dry to obtain the functional filler.

[0032] Preparation Example 3 The specific preparation steps of the functional filler are the same as those in Preparation Example 2, except that the amount of polyethylene glycol monomethyl ether (number average molecular weight of 1500) added in step (2) is 32.5g.

[0033] Preparation Example 4 The specific preparation steps of the functional filler are the same as those in Preparation Example 2, except that the amount of sodium 3-chloro-2-hydroxypropanesulfonate added in step (3) is 7g.

[0034] Preparation Example 5 The preparation steps of functional fillers are as follows: 20g of titanium dioxide and 200mL of anhydrous ethanol were mixed evenly, and then 3g of γ-aminopropylmethyldimethoxysilane was added. The mixture was stirred at 60℃ for 2h, and then centrifuged, washed three times with anhydrous ethanol, and dried to obtain pretreated titanium dioxide.

[0035] Preparation Example 6 The preparation steps of functional fillers are as follows: (1) Mix 20g of titanium dioxide and 200mL of anhydrous ethanol evenly, then add 3g of γ-aminopropylmethyldimethoxysilane, stir at 60℃ for 2h, centrifuge, wash 3 times with anhydrous ethanol and dry to obtain pretreated titanium dioxide. (2) Mix 5g of pretreated titanium dioxide from step (1) with 25g of polyethylene glycol monomethyl ether (number average molecular weight of 1500), add 0.1g of p-toluenesulfonic acid, heat to 115℃ under nitrogen atmosphere and react for 5h, cool to room temperature, centrifuge, wash three times with anhydrous ethanol and dry to obtain functional filler. Example 1

[0036] A type of elastic, colorful, and silky polyester material, by weight, comprises the following raw materials: 100 parts polyester chips, 8 parts color masterbatch, 2 parts antioxidant, 3 parts functional filler, and 2 parts coupling agent.

[0037] The preparation method of the elastic, colorful, silky polyester material in this embodiment includes the following steps: The functional filler and coupling agent are mixed and pretreated in a high-speed mixer at 1200 r / min and 85℃ for 15 min. Then, polyester chips, color masterbatch, and antioxidant are added and mixed for 20 min. The mixture is then transferred to a screw extruder and subjected to melt spinning (270℃, metering pump controlled feed of 4000 g / min, spinning speed of 3500 m / min), ring blowing (air temperature of 23℃, air speed controlled at 0.6 m / s, air humidity of RH 60%), bundled oiling (oiling rate controlled at 0.5%), and stretching (first hot roller stretching speed of 1200 m / min, temperature of 83℃, second hot roller stretching speed of 3500 m / min, temperature of 126℃, stretching ratio of 3.5 times) to obtain the elastic cool color cool silk cotton polyester material.

[0038] The color masterbatch used was obtained from Preparation Example 1, and the functional filler was obtained from Preparation Example 2. Example 2

[0039] A type of elastic, colorful, and silky polyester material, by weight, comprises the following raw materials: 100 parts polyester chips, 5 parts color masterbatch, 1 part antioxidant, 1 part functional filler, and 1 part coupling agent.

[0040] The preparation method of the elastic, colorful, silky polyester material in this embodiment includes the following steps: The functional filler and coupling agent are mixed and pretreated in a high-speed mixer at 1200 r / min and 85℃ for 15 min. Then, polyester chips, color masterbatch, and antioxidant are added and mixed for 20 min. The mixture is then transferred to a screw extruder and subjected to melt spinning (270℃, metering pump controlled feed of 4000 g / min, spinning speed of 3500 m / min), ring blowing (air temperature of 23℃, air speed controlled at 0.6 m / s, air humidity of RH 60%), bundled oiling (oiling rate controlled at 0.5%), and stretching (first hot roller stretching speed of 1200 m / min, temperature of 83℃, second hot roller stretching speed of 3500 m / min, temperature of 126℃, stretching ratio of 3.5 times) to obtain the elastic cool color cool silk cotton polyester material.

[0041] The color masterbatch used was obtained from Preparation Example 1, and the functional filler was obtained from Preparation Example 2. Example 3

[0042] A type of elastic, colorful, and silky polyester material, by weight, comprises the following raw materials: 100 parts polyester chips, 10 parts color masterbatch, 3 parts antioxidant, 5 parts functional filler, and 3 parts coupling agent.

[0043] The preparation method of the elastic, colorful, silky polyester material in this embodiment includes the following steps: The functional filler and coupling agent are mixed and pretreated in a high-speed mixer at 1200 r / min and 85℃ for 15 min. Then, polyester chips, color masterbatch, and antioxidant are added and mixed for 20 min. The mixture is then transferred to a screw extruder and subjected to melt spinning (270℃, metering pump controlled feed of 4000 g / min, spinning speed of 3500 m / min), ring blowing (air temperature of 23℃, air speed controlled at 0.6 m / s, air humidity of RH 60%), bundled oiling (oiling rate controlled at 0.5%), and stretching (first hot roller stretching speed of 1200 m / min, temperature of 83℃, second hot roller stretching speed of 3500 m / min, temperature of 126℃, stretching ratio of 3.5 times) to obtain the elastic cool color cool silk cotton polyester material.

[0044] The color masterbatch used was obtained from Preparation Example 1, and the functional filler was obtained from Preparation Example 2. Example 4

[0045] A type of elastic, colorful, and cool polyester material and its preparation method are disclosed. The specific implementation method is the same as that in Example 1, except that the functional filler used in this example is obtained from Preparation Example 3. Example 5

[0046] A type of elastic, colorful, and cool polyester material and its preparation method are disclosed. The specific implementation method is the same as that in Example 1, except that the functional filler used in this example is obtained from Preparation Example 4. Example 6

[0047] A type of elastic, colorful, and cool polyester material and its preparation method are disclosed. The specific implementation method is the same as that in Example 1, except that the functional filler used in this example is obtained from Preparation Example 5. Example 7

[0048] A type of elastic, colorful, and cool polyester material and its preparation method are disclosed. The specific implementation method is the same as that in Example 1, except that the functional filler used in this example is obtained from Preparation Example 6. Example 8

[0049] A type of elastic, colorful, and cool polyester material and its preparation method are disclosed. The specific implementation method is the same as that in Example 1, except that the functional filler used in this example is titanium dioxide.

[0050] Performance testing: The polyester materials prepared in Examples 1-8 above were subjected to the following performance tests, and the specific test results are shown in Table 1: Moisture absorption and wicking properties: The water absorption rate (%) and drying rate (g / h) of polyester materials were tested in accordance with GB / T 21655.1-2023.

[0051] Table 1 As shown in Table 1, the polyester materials prepared in Examples 1-3 have excellent moisture permeability and quick-drying properties. Comparing Examples 4 and 1, it can be seen that changing the amount of polyethylene glycol monomethyl ether added during the preparation of the functional filler slightly decreases the water absorption rate, but the drying rate remains basically unchanged. This may be because the polyether segments are entangled with each other, affecting the exposure of sulfonic acid groups, thereby reducing the moisture absorption performance. Comparing Examples 5 and 1, it can be seen that changing the amount of sodium 3-chloro-2-hydroxypropanesulfonate added during the preparation of the functional filler increases the water absorption rate, but slightly decreases the drying rate. This may be because the sulfonic acid groups form a thicker water film on the material surface, hindering the evaporation and diffusion of moisture, resulting in a decrease in performance. Comparing Examples 6 and 8 with Example 1, it can be seen that when the functional filler used is coupling agent-modified titanium dioxide or commercially available titanium dioxide, its performance in this system is limited, and the moisture permeability and quick-drying properties of the polyester material decrease to varying degrees. Comparing Examples 7 and 1, it can be seen that when coupling agent and polyethylene glycol monomethyl ether-modified titanium dioxide are used as functional fillers, its moisture absorption performance decreases significantly.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present application in any way. Although the present application discloses the preferred embodiment as described above, it is not intended to limit the present application. Any changes or modifications made by those skilled in the art without departing from the scope of the technical solution of the present application using the disclosed technical content are equivalent to equivalent implementation cases. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention are still within the scope of the technical solution.

Claims

1. A polyester material for use with elastic, colorful, and silky fabrics, characterized in that, By weight, the polyester material comprises the following raw materials: 100 parts polyester chips, 5-10 parts color masterbatch, 1-3 parts antioxidant, 1-5 parts functional filler, and 1-3 parts coupling agent.

2. The polyester material for elastic, colorful, and silky fabrics according to claim 1, characterized in that, The moisture content of the polyester chips is ≤40ppm.

3. The polyester material for elastic, colorful, and silky fabric as described in claim 1, characterized in that, The masterbatch is a mixture of matrix powder, colorant and toughening agent, with a mass ratio of 70:(10-30):(5-10).

4. The polyester material for elastic, colorful, and silky fabric according to claim 1, characterized in that, The antioxidant is at least one of antioxidant 1076, antioxidant 1010 and antioxidant 264.

5. The polyester material for elastic, colorful, and silky fabric according to claim 1, characterized in that, The preparation steps of the functional filler are as follows: (1) Mix titanium dioxide and anhydrous ethanol evenly, then add γ-aminopropylmethyldimethoxysilane, stir at 55-70℃ for 1-3 hours, and then centrifuge, wash and dry to obtain pretreated titanium dioxide. (2) The pretreated titanium dioxide from step (1) and polyethylene glycol monomethyl ether are mixed, a catalyst is added, and the mixture is heated to 110-120℃ under an inert atmosphere for 3-6 hours. After cooling to room temperature, it is separated by centrifugation, washed and dried to obtain secondary modified titanium dioxide. (3) Mix the secondary modified titanium dioxide from step (2) with deionized water, add sodium 3-chloro-2-hydroxypropanesulfonate, adjust the pH to 8-9, react at 70-85℃ for 3-5 hours, and obtain the functional filler by centrifugation, washing and drying.

6. The polyester material for elastic, colorful, and silky fabric according to claim 5, characterized in that, In step (1), the mass ratio of titanium dioxide to γ-aminopropylmethyldimethoxysilane is 1:(0.1-0.2).

7. The polyester material for elastic, colorful, and silky fabric according to claim 5, characterized in that, In step (2), the mass ratio of the pretreated titanium dioxide to polyethylene glycol monomethyl ether is 1:(4-6).

8. The polyester material for elastic, colorful, and silky fabric according to claim 1, characterized in that, In step (3), the mass ratio of the secondary modified titanium dioxide and sodium 3-chloro-2-hydroxypropanesulfonate is 1:(0.5-1.2).

9. The polyester material for elastic, colorful, and silky fabric according to claim 1, characterized in that, The coupling agent is at least one of silane coupling agents, aluminate coupling agents, and titanate coupling agents.

10. A method for preparing a polyester material for elastic, colorful, silky fabric as described in any one of claims 1-9, characterized in that, It includes the following steps: The functional filler and coupling agent are mixed and pretreated in a high-speed mixer at 80-100℃ for 10-20 minutes. Then, polyester chips, color masterbatch and antioxidant are added and mixed. The mixture is then transferred to a screw extruder and subjected to melt spinning, ring blowing, bundling and oiling, and stretching to obtain the elastic cool color cool silk cotton polyester material.

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