Highly warm-keeping clothing fabric and preparation method thereof

Abstract

The application relates to the technical field of textile fabrics, in particular to high-efficiency warm-keeping garment fabric and a preparation method thereof, which comprises the following raw materials in parts by weight: polyester resin 78-82 parts, composite powder 4-6 parts, composite additive liquid 5-7 parts, plasticizer 1.5-2.5 parts, compatibility agent 1.2-1.6 parts, antioxidant 0.5-0.8 parts and lubricant 0.3-0.5 parts. In the application, the porous hollow structure of cattail down fine powder in the composite powder and the micropore adsorption structure of the powder construct an air heat insulation system, stationary air is retained, a low thermal conductivity barrier layer is formed, the outward conduction and diffusion of body surface heat are effectively blocked, meanwhile, the composite additive liquid forms a uniform and dense flexible coating on the fiber surface, further blocks the heat convection channel among the fibers, cooperatively reduces the overall heat conduction coefficient of the fabric, improves the static heat storage and dynamic heat insulation capacity of the fabric, and effectively improves the defects of the insufficient warm-keeping performance of traditional polyester.

Description

Technical Field

[0001] This invention relates to the field of textile fabric technology, specifically to a high-efficiency warm clothing fabric and its preparation method. Background Technology

[0002] Polyester clothing fabric is a synthetic fiber fabric with polyethylene terephthalate as the core raw material. It is first made into fibers through melt spinning, and then woven and dyed. This fabric is widely used in clothing, home textiles, industrial textiles and other fields. It has advantages such as high strength, good abrasion resistance, low cost and excellent weaving performance. It is one of the fabrics with the largest output and widest applicability in the current textile industry.

[0003] In existing technologies, polyester fibers have a dense structure and high thermal conductivity, resulting in weak heat storage and insulation capabilities, easy heat loss from the body surface, and poor warmth retention in autumn and winter. Therefore, this invention provides a highly efficient warm clothing fabric and its preparation method. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency thermal insulation clothing fabric and its preparation method. The high-efficiency thermal insulation clothing fabric prepared by this invention not only has good thermal insulation performance, but also excellent water resistance, effectively improving the performance of clothing fabrics.

[0005] To achieve the above objectives, the present invention provides the following technical solution: In a first aspect, the present invention provides a highly efficient and warm clothing fabric, comprising the following raw materials in parts by weight: 78-82 parts polyester resin, 4-6 parts composite powder, 5-7 parts composite additive liquid, 1.5-2.5 parts plasticizer, 1.2-1.6 parts compatibilizer, 0.5-0.8 parts antioxidant, and 0.3-0.5 parts lubricant.

[0006] Furthermore, the composite powder is prepared from cattail fluff and powder.

[0007] Furthermore, the composite additive liquid is prepared from tea saponin and additives, and the tea saponin is pretreated before preparing the composite additives.

[0008] Further, the preparation method of the composite powder is as follows: pyrolyze cattail fluff at 290-310℃ for 40-60 min under a nitrogen atmosphere, cool naturally to room temperature, and then pulverize to 15μm to obtain cattail fluff fine powder. Mix the cattail fluff fine powder with the powder at a mass ratio of (2-2.5):1, and place in a high-speed grinder. Grind at 2000-2200rpm for 30-40 min at 20-30℃. After mixing evenly, dry in an oven at 55-65℃ for 1.5-2.5 h to obtain the composite powder.

[0009] Further, the preparation method of the powder is as follows: Coconut shell activated carbon powder is soaked in a 5% sodium bicarbonate aqueous solution at a mass ratio of (3-4):1 for 15-20 minutes. The filtered coconut shell activated carbon powder is rinsed with deionized water until neutral and dried in an oven at 60-70℃ for 1.5-2.5 hours to obtain dried coconut shell activated carbon powder. Then, shellac is heated at 85-95℃ for 10-20 minutes to obtain molten shellac. The molten shellac is mixed with the dried coconut shell activated carbon powder and stirred at 85-95℃ and 300 rpm for 25-35 minutes. After natural cooling and solidification, it is pulverized to 15 μm to obtain the powder. The particle size of the coconut shell activated carbon powder is 50 μm, and the mass ratio of molten shellac to dried coconut shell activated carbon powder is 1:(4-5).

[0010] Further, the preparation method of the composite additive solution is as follows: the additive and tea saponin are mixed at a mass ratio of 1:(1.5-2), and deionized water is added. The mixture is stirred at 40-50℃ and 300-400rpm for 30-40 minutes, then naturally cooled to room temperature and allowed to stand for defoaming for 20-30 minutes to obtain the composite additive solution. The mass of the deionized water is 8-10 times the mass of the additive and the tea saponin.

[0011] Further, the pretreatment method for tea saponin is as follows: tea saponin and ethyl chloroacetate are mixed at a mass ratio of 1:(9-11), stirred at 20-30℃ and 200rpm for 8-12min, and then placed in a sealed reaction vessel. The temperature is increased to 55-65℃ at a rate of 3-5℃ / min, and the mixture is stirred at 250rpm for 1.5-2h. After the reaction is completed, the mixture is naturally cooled to room temperature and then rotary evaporated at 45-55℃ and -0.08MPa for 30-40min. The solid product obtained by rotary evaporation is purified by recrystallization with ethanol, and finally vacuum dried at 55-65℃ and 0.09MPa for 1.5-2.5h to obtain pretreated tea saponin.

[0012] Further, the preparation method of the additive is as follows: xylan powder is added to an 8-12% sodium hydroxide aqueous solution at a mass ratio of 1:(15-17), stirred at 35-45℃ and 250rpm for 30-50min, then sodium chloroacetate is added, and the temperature is raised to 55-65℃ at a rate of 2-4℃ / min and reacted at a constant temperature for 2-3h. After the reaction is completed, the pH value of the system is adjusted to neutral, and the precipitate is allowed to stand for 1-2h. The precipitate is collected by filtration and washed 3-5 times with deionized water. The precipitate is then vacuum dried at 55-65℃ and 0.09MPa for 3-5h and pulverized to 15μm to obtain the additive, wherein the mass of sodium chloroacetate is 0.8-1.2 times the mass of xylan powder.

[0013] Furthermore, the polyester resin is PET polyester chips, and is vacuum dried at 120-130℃ and 0.09MPa for 8-12 hours before preparing the high-efficiency warm clothing fabric.

[0014] Furthermore, the plasticizer is polyethylene glycol diacrylate, and the compatibilizer is POE-g-MAH.

[0015] Furthermore, the antioxidant is antioxidant 1010, and the lubricant is zinc stearate.

[0016] Secondly, the present invention provides a method for preparing a highly efficient and warm clothing fabric, comprising the following steps: S1: Add polyester resin and composite powder into a high-speed mixer and stir at 20-30℃ and 350-450rpm for 15-20min to obtain a premix. Slowly add composite additive liquid to the premix at a rate of 2-3mL / s, and then add plasticizer, compatibilizer, antioxidant and lubricant in sequence. Heat to 40-50℃ at a rate of 2-4℃ / min and continue stirring for 25-35min to obtain a mixture. S2: The mixture is fed into a twin-screw extruder for melt extrusion. The temperatures of each section are set as follows: feeding section 215-225℃, compression section 225-235℃, metering section 235-245℃, screw speed 250-350 rpm. After water cooling and pelletizing, it is placed in an oven at 55-65℃ and dried for 2.5-3.5 hours to obtain polyester masterbatch. S3: Polyester masterbatch is produced by melt spinning process, with spinning temperature set at 230-250℃, spinning speed at 800-1200m / min, air-cooled to room temperature at 20-25℃, and draw ratio at 1.8-2.2 times to obtain polyester filament; S4: Polyester filaments are hot-air low-temperature set at 80-90℃ for 10-15 minutes, with an ambient humidity of 40-50%, and then cooled and wound to obtain polyester fibers. The polyester fibers are then warped, woven, dyed and finished, and softened and set to obtain a highly efficient and warm clothing fabric.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, an air insulation system is constructed by combining the porous hollow structure of the cattail fluff powder in the composite powder with the microporous adsorption structure of the powder. This system traps still air and forms a low thermal conductivity barrier layer, effectively blocking the conduction and diffusion of heat from the body surface. At the same time, the composite additive liquid forms a uniform and dense flexible film on the fiber surface, further sealing the heat convection channels between fibers. This synergistically reduces the overall thermal conductivity of the fabric, improves the static heat storage and dynamic heat insulation capabilities of the fabric, and effectively improves the shortcomings of traditional polyester in terms of insufficient warmth retention.

[0018] 2. In this invention, the tea saponin pretreated in the composite additive liquid reduces hydrophilic activity and improves the interfacial compatibility between the remaining components and the polyester matrix. Combined with the hydrogen bond cross-linking anchoring of the additives, the functional components are more firmly bound to the inside of the fiber matrix. The shellac in the powder can effectively block water flow penetration and erosion, preventing the porous powder from falling off and the functional additives from dissolving. The two work together to improve the interfacial compatibility and structural stability of the fabric, making the functional filler of the fabric less prone to falling off and more resistant to washing. Attached Figure Description

[0019] Figure 1 The present invention provides a flowchart of a highly efficient and warm clothing fabric and its preparation method. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that the raw materials used in the following embodiments are all commercially available.

[0022] Example 1

[0023] Prepare the following raw materials by weight: 78 parts polyester resin, 4 parts composite powder, 5 parts composite additive liquid, 1.5 parts plasticizer, 1.2 parts compatibilizer, 0.5 parts antioxidant, and 0.3 parts lubricant. The polyester resin is PET polyester chips, which are vacuum dried at 120℃ and 0.09MPa for 8 hours before preparing the high-efficiency thermal insulation clothing fabric.

[0024] Powder preparation: Coconut shell activated carbon powder was soaked in a 5% sodium bicarbonate aqueous solution at a mass ratio of 3:1 for 15 minutes. The filtered coconut shell activated carbon powder was rinsed with deionized water until neutral and dried in an oven at 60℃ for 1.5 hours to obtain dried coconut shell activated carbon powder. Then, shellac was heated at 85℃ for 10 minutes to obtain molten shellac. The molten shellac was mixed with the dried coconut shell activated carbon powder and stirred at 300 rpm at 85℃ for 25 minutes. After natural cooling and solidification, it was pulverized to 15 μm to obtain powder. The particle size of the coconut shell activated carbon powder was 50 μm, and the mass ratio of molten shellac to dried coconut shell activated carbon powder was 1:4.

[0025] Preparation of composite powder: Cattail fluff was pyrolyzed at 290℃ for 40 min under nitrogen atmosphere, and after natural cooling to room temperature, it was pulverized to 15 μm to obtain cattail fluff fine powder. The cattail fluff fine powder was mixed with the powder at a mass ratio of 2:1 and placed in a high-speed grinder. It was ground at 2000 rpm for 30 min at 20℃. After homogenization, it was placed in an oven at 55℃ and dried for 1.5 h to obtain composite powder.

[0026] Tea saponin pretreatment: Tea saponin and ethyl chloroacetate were mixed at a mass ratio of 1:9 and stirred at 20℃ and 200 rpm for 8 min. After stirring, the mixture was placed in a sealed reaction vessel and heated to 55℃ at a rate of 3℃ / min. The mixture was stirred at 250 rpm for 1.5 h. After the reaction was completed, the mixture was naturally cooled to room temperature and then rotary evaporated at 45℃ and -0.08 MPa for 30 min. The solid product obtained by rotary evaporation was purified by recrystallization with ethanol and finally vacuum dried at 55℃ and 0.09 MPa for 1.5 h to obtain pretreated tea saponin.

[0027] Preparation of additive: Xylan powder was added to an 8% sodium hydroxide aqueous solution at a mass ratio of 1:15. The mixture was stirred at 35℃ and 250 rpm for 30 min. Then sodium chloroacetate was added, and the temperature was increased to 55℃ at a rate of 2℃ / min and kept at a constant temperature for 2 h. After the reaction was completed, the pH of the system was adjusted to neutral, and the mixture was allowed to stand for 1 h to precipitate. The precipitate was collected by filtration and washed three times with deionized water. The mixture was then vacuum dried at 55℃ and 0.09 MPa for 3 h and pulverized to 15 μm to obtain the additive. The mass of sodium chloroacetate was 0.8 times the mass of xylan powder.

[0028] Preparation of composite additive solution: Mix the additive with tea saponin at a mass ratio of 1:1.5, add deionized water, stir at 40℃ and 300rpm for 30min, cool naturally to room temperature, and let stand for 20min to defoam to obtain composite additive solution. The mass of deionized water is 8 times the mass of the additive and tea saponin.

[0029] Preparation of highly efficient and warm clothing fabrics: S1: Add polyester resin and composite powder to a high-speed mixer and stir at 20°C and 350 rpm for 15 min to obtain a premix. Slowly add composite additive liquid to the premix at a rate of 2 mL / s, and then add plasticizer, compatibilizer, antioxidant and lubricant in sequence. Heat to 40°C at a rate of 2°C / min and continue stirring for 25 min to obtain a mixture. S2: The mixture is fed into a twin-screw extruder for melt extrusion. The temperatures of each section are set as follows: feeding section 215℃, compression section 225℃, metering section 235℃, screw speed 250rpm. After water cooling and pelletizing, the mixture is placed in a 55℃ oven and dried for 2.5h to obtain polyester masterbatch. S3: The polyester masterbatch is produced by melt spinning process, with a spinning temperature of 230℃, a spinning speed of 800m / min, and air cooling at 20℃ to room temperature. The draw ratio is 1.8 times to obtain polyester filament. S4: Polyester filaments are hot-air low-temperature set at 80℃ for 10 minutes with an ambient humidity of 40%, and then cooled and wound to obtain polyester fibers. The polyester fibers are then warped, woven, dyed and finished, softened and set to obtain a highly efficient and warm clothing fabric.

[0030] Example 2

[0031] Prepare the following raw materials by weight: 80 parts polyester resin, 5 parts composite powder, 6 parts composite additive liquid, 2.0 parts plasticizer, 1.4 parts compatibilizer, 0.6 parts antioxidant, and 0.4 parts lubricant. The polyester resin is PET polyester chips, which are vacuum dried at 125℃ and 0.09MPa for 10 hours before preparing the high-efficiency thermal insulation clothing fabric.

[0032] Powder preparation: Coconut shell activated carbon powder was soaked in a 5% sodium bicarbonate aqueous solution at a mass ratio of 3.5:1 for 18 minutes. The filtered coconut shell activated carbon powder was rinsed with deionized water until neutral and dried in an oven at 65℃ for 2 hours to obtain dried coconut shell activated carbon powder. Then, shellac was heated at 90℃ for 15 minutes to obtain molten shellac. The molten shellac was mixed with the dried coconut shell activated carbon powder and stirred at 300 rpm at 90℃ for 30 minutes. After natural cooling and solidification, it was pulverized to 15 μm to obtain powder. The particle size of the coconut shell activated carbon powder was 50 μm, and the mass ratio of molten shellac to dried coconut shell activated carbon powder was 1:4.5.

[0033] Preparation of composite powder: Cattail fluff was pyrolyzed at 300℃ for 50 min under nitrogen atmosphere, and after natural cooling to room temperature, it was pulverized to 15 μm to obtain cattail fluff fine powder. The cattail fluff fine powder was mixed with the powder at a mass ratio of 2.2:1 and placed in a high-speed grinder. It was ground at 2100 rpm for 35 min at 25℃. After homogenization, it was placed in a 60℃ oven and dried for 2 h to obtain composite powder.

[0034] Tea saponin pretreatment: Tea saponin and ethyl chloroacetate were mixed at a mass ratio of 1:10 and stirred at 25℃ and 200 rpm for 10 min. After stirring, the mixture was placed in a sealed reaction vessel and heated to 60℃ at a rate of 4℃ / min. The mixture was stirred at 250 rpm for 1.8 h. After the reaction was completed, the mixture was naturally cooled to room temperature and then rotary evaporated at 50℃ and -0.08 MPa for 35 min. The solid product obtained by rotary evaporation was purified by recrystallization with ethanol and finally vacuum dried at 60℃ and 0.09 MPa for 2 h to obtain pretreated tea saponin.

[0035] Preparation of additive: Xylan powder was added to a 10% sodium hydroxide aqueous solution at a mass ratio of 1:16. The mixture was stirred at 40℃ and 250 rpm for 40 min. Then sodium chloroacetate was added, and the temperature was increased to 60℃ at a rate of 3℃ / min and reacted at a constant temperature for 2.5 h. After the reaction was completed, the pH of the system was adjusted to neutral, and the mixture was allowed to stand for 1.5 h to precipitate. The precipitate was collected by filtration and washed 4 times with deionized water. The mixture was then vacuum dried at 60℃ and 0.09 MPa for 4 h and pulverized to 15 μm to obtain the additive. The mass of sodium chloroacetate was 1.0 times the mass of xylan powder.

[0036] Preparation of composite additive solution: Mix the additive with tea saponin at a mass ratio of 1:1.8, add deionized water, stir at 45℃ and 350rpm for 35min, cool naturally to room temperature, and let stand for 25min to defoam to obtain the composite additive solution. The mass of deionized water is 9 times the mass of the additive and tea saponin.

[0037] Preparation of highly efficient and warm clothing fabrics: S1: Add polyester resin and composite powder to a high-speed mixer and stir at 25°C and 400 rpm for 18 min to obtain a premix. Slowly add composite additive liquid to the premix at a rate of 2.5 mL / s, and then add plasticizer, compatibilizer, antioxidant and lubricant in sequence. Heat to 45°C at a rate of 3°C / min and continue stirring for 30 min to obtain a mixture. S2: The mixture is fed into a twin-screw extruder for melt extrusion. The temperatures of each section are set as follows: feeding section 220℃, compression section 230℃, metering section 240℃, screw speed 300rpm. After water cooling and pelletizing, the mixture is placed in a 60℃ oven for drying for 3 hours to obtain polyester masterbatch. S3: The polyester masterbatch is produced by melt spinning process, with a spinning temperature of 240℃, a spinning speed of 1000m / min, and air cooling at 23℃ to room temperature. The draw ratio is 2.0 times to obtain polyester filament. S4: Polyester filaments are hot-air low-temperature set at 85℃ for 12 minutes with an ambient humidity of 45%, and then cooled and wound to obtain polyester fibers. The polyester fibers are then warped, woven, dyed and finished, softened and set to obtain a highly efficient and warm clothing fabric.

[0038] Example 3

[0039] Prepare the following raw materials by weight: 82 parts polyester resin, 6 parts composite powder, 7 parts composite additive liquid, 2.5 parts plasticizer, 1.6 parts compatibilizer, 0.8 parts antioxidant, and 0.5 parts lubricant. The polyester resin is PET polyester chips, which are vacuum dried at 130℃ and 0.09MPa for 12 hours before preparing the high-efficiency heat-insulating clothing fabric.

[0040] Powder preparation: Coconut shell activated carbon powder was soaked in a 5% sodium bicarbonate aqueous solution at a mass ratio of 4:1 for 20 min. The filtered coconut shell activated carbon powder was rinsed with deionized water until neutral and dried in a 70℃ oven for 2.5 h to obtain dried coconut shell activated carbon powder. Then, shellac was heated at 95℃ for 20 min to obtain molten shellac. The molten shellac was mixed with the dried coconut shell activated carbon powder and stirred at 300 rpm at 95℃ for 35 min. After natural cooling and solidification, it was pulverized to 15 μm to obtain powder. The particle size of the coconut shell activated carbon powder was 50 μm, and the mass ratio of molten shellac to dried coconut shell activated carbon powder was 1:5.

[0041] Preparation of composite powder: Cattail fluff was pyrolyzed at 310℃ for 60 min under nitrogen atmosphere, and after natural cooling to room temperature, it was pulverized to 15 μm to obtain cattail fluff fine powder. The cattail fluff fine powder was mixed with the powder at a mass ratio of 2.5:1 and placed in a high-speed grinder. It was ground at 2200 rpm at 30℃ for 40 min. After homogenization, it was placed in an oven at 65℃ and dried for 2.5 h to obtain composite powder.

[0042] Tea saponin pretreatment: Tea saponin and ethyl chloroacetate were mixed at a mass ratio of 1:11 and stirred at 30℃ and 200 rpm for 12 min. After stirring, the mixture was placed in a sealed reaction vessel and heated to 65℃ at a rate of 5℃ / min. The mixture was stirred at 250 rpm for 2 h. After the reaction was completed, the mixture was naturally cooled to room temperature and then rotary evaporated at 55℃ and -0.08 MPa for 40 min. The solid product obtained by rotary evaporation was purified by recrystallization from ethanol and finally vacuum dried at 65℃ and 0.09 MPa for 2.5 h to obtain pretreated tea saponin.

[0043] Preparation of additive: Xylan powder was added to a 12% sodium hydroxide aqueous solution at a mass ratio of 1:17. The mixture was stirred at 45℃ and 250 rpm for 50 min. Then sodium chloroacetate was added, and the temperature was increased to 65℃ at a rate of 4℃ / min and kept at a constant temperature for 3 h. After the reaction was completed, the pH of the system was adjusted to neutral, and the mixture was allowed to stand for 2 h to precipitate. The precipitate was collected by filtration and washed 5 times with deionized water. The mixture was then vacuum dried at 65℃ and 0.09 MPa for 5 h and pulverized to 15 μm to obtain the additive. The mass of sodium chloroacetate was 1.2 times the mass of xylan powder.

[0044] Preparation of composite additive solution: Mix the additive with tea saponin at a mass ratio of 1:2, add deionized water, stir at 50℃ and 400rpm for 40min, cool naturally to room temperature, and let stand for 30min to defoam to obtain composite additive solution, wherein the mass of deionized water is 10 times the mass of additive and tea saponin.

[0045] Preparation of highly efficient and warm clothing fabrics: S1: Add polyester resin and composite powder to a high-speed mixer and stir at 30°C and 450 rpm for 20 min to obtain a premix. Slowly add composite additive liquid to the premix at a rate of 3 mL / s, and then add plasticizer, compatibilizer, antioxidant and lubricant in sequence. Heat to 50°C at a rate of 4°C / min and continue stirring for 35 min to obtain a mixture. S2: The mixture is fed into a twin-screw extruder for melt extrusion. The temperatures of each section are set as follows: feeding section 225℃, compression section 235℃, metering section 245℃, screw speed 350rpm. After water cooling and pelletizing, the mixture is placed in a 65℃ oven and dried for 3.5h to obtain polyester masterbatch. S3: The polyester masterbatch is produced by melt spinning process, with a spinning temperature of 250℃, a spinning speed of 1200m / min, and air cooling at 25℃ to room temperature. The draw ratio is 2.2 times to obtain polyester filament. S4: Polyester filaments are hot-air low-temperature set at 90℃ for 15 minutes with an ambient humidity of 50%, and then cooled and wound to obtain polyester fibers. The polyester fibers are then warped, woven, dyed and finished, softened and set to obtain a highly efficient and warm clothing fabric.

[0046] Comparative Example 1: The difference between this comparative example and Example 1 is that this comparative example does not contain composite powder.

[0047] Comparative Example 2: The difference between this comparative example and Example 1 is that this comparative example does not contain the compound additive liquid.

[0048] Comparative Example 3: The difference between this comparative example and Example 1 is that the tea saponin in this comparative example is not pretreated.

[0049] Performance testing: The high-efficiency thermal insulation clothing fabrics prepared in Examples 1-3 and Comparative Examples 1-3 were subjected to performance testing, and the test data are recorded in the table below: Table 1

[0050] In the performance tests, the heat retention test was conducted in accordance with GB / T 46396-2025, and the water washability test was conducted in accordance with FZ / T72001-2009.

[0051] The thermal insulation ratings of the high-efficiency thermal insulation clothing fabrics prepared in Examples 1-3 and Comparative Examples 1-3 were Level 3, Level 4, Level 3, Level 2, Level 3, and Level 3, respectively.

[0052] The vertical dimensional change rate test results of the high-efficiency heat-insulating clothing fabrics prepared in Examples 1-3 and Comparative Examples 1-3 were -0.5%, -0.3%, -0.4%, -0.9%, -1.2%, and -0.7%, respectively.

[0053] The transverse dimensional change rate of the highly efficient heat-insulating clothing fabrics prepared in Examples 1-3 and Comparative Examples 1-3 were -0.4%, -0.3%, -0.4%, -0.8%, -1.1%, and -0.7%, respectively.

[0054] It is evident that the high-efficiency thermal insulation clothing fabrics prepared in Comparative Examples 1-3 have lower thermal insulation performance and washability than those in Examples 1-3. This indicates that in the composite powder, the cattail fluff powder, with its porous hollow structure, locks still air inside the pores, forming a low thermal conductivity insulating medium layer that effectively blocks heat transfer. Shellac has certain hydrophobic and low thermal conductivity properties. When combined with microporous coconut shell activated carbon, it forms a hydrophobic coating layer, reducing the heat carried away by water adsorption and evaporation, blocking water flow erosion and penetration, preventing porous powder from falling off and the fiber structure from becoming loose, thus improving the fabric's thermal insulation and reducing the dimensional change rate after washing. In the composite additive liquid, tea saponin and the additives form a cross-linked network through hydrogen bonding, firmly anchoring the functional components inside the fiber. Among them, the tea saponin, through pretreatment, introduces hydrophobic ethyl segments to improve the interfacial compatibility with the hydrophobic polyester matrix, reducing the separation of functional components and structural defects during washing, reducing the dimensional change rate after washing, and improving washability. Comparative Example 1 does not contain composite powder and lacks a porous structure to block heat conduction and a hydrophobic coating layer, resulting in a significant decrease in heat retention and washability. Comparative Example 2 does not contain composite additive liquid, and the functional components are easily washed off, leading to a decrease in washability, but without affecting the heat retention performance. Comparative Example 3 has no pre-treated tea saponin, resulting in weak interfacial bonding with the polyester matrix. The separation of functional components during washing will affect the washability.

[0055] By comparing and analyzing the relevant data in the table, it can be seen that the high-efficiency thermal insulation clothing fabric prepared by this invention not only has good thermal insulation performance but also excellent washability. This indicates that the high-efficiency thermal insulation clothing fabric provided by this invention has a broader market prospect and is more suitable for promotion.

[0056] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A highly efficient and warm clothing fabric, characterized in that, The raw materials include the following parts by weight: 78-82 parts polyester resin, 4-6 parts composite powder, 5-7 parts composite additive liquid, 1.5-2.5 parts plasticizer, 1.2-1.6 parts compatibilizer, 0.5-0.8 parts antioxidant, and 0.3-0.5 parts lubricant; The composite powder is prepared from cattail fluff and powder; The composite additive solution is prepared from tea saponin and other additives, and the tea saponin is pretreated before the composite additive is prepared.

2. The high-efficiency thermal insulation clothing fabric according to claim 1, characterized in that, The preparation method of the composite powder is as follows: pyrolysis of cattail fluff at 290-310℃ for 40-60 min under a nitrogen atmosphere, followed by natural cooling to room temperature, and then pulverizing to 15 μm to obtain fine cattail fluff powder. The fine cattail fluff powder is mixed with the powder at a mass ratio of (2-2.5):1 and placed in a high-speed grinder. The mixture is then ground at 2000-2200 rpm for 30-40 min at 20-30℃. After uniform mixing, the mixture is dried in an oven at 55-65℃ for 1.5-2.5 h to obtain the composite powder.

3. The high-efficiency thermal insulation clothing fabric according to claim 1, characterized in that, The preparation method of the powder is as follows: Coconut shell activated carbon powder is soaked in a 5% sodium bicarbonate aqueous solution for 15-20 minutes at a mass ratio of (3-4):

1. The filtered coconut shell activated carbon powder is rinsed with deionized water until neutral and dried in an oven at 60-70℃ for 1.5-2.5 hours to obtain dried coconut shell activated carbon powder. Then, shellac is heated at 85-95℃ for 10-20 minutes to obtain molten shellac. The molten shellac is mixed with the dried coconut shell activated carbon powder and stirred at 85-95℃ and 300 rpm for 25-35 minutes. After natural cooling and solidification, it is pulverized to 15μm to obtain the powder. The particle size of the coconut shell activated carbon powder is 50μm, and the mass ratio of molten shellac to dried coconut shell activated carbon powder is 1:(4-5).

4. The high-efficiency thermal insulation clothing fabric according to claim 1, characterized in that, The preparation method of the composite additive solution is as follows: the additive and tea saponin are mixed at a mass ratio of 1:(1.5-2), and deionized water is added. The mixture is stirred at 40-50℃ and 300-400rpm for 30-40 minutes, then naturally cooled to room temperature and allowed to stand for defoaming for 20-30 minutes to obtain the composite additive solution. The mass of deionized water is 8-10 times the mass of the additive and tea saponin.

5. The high-efficiency thermal insulation clothing fabric according to claim 1, characterized in that, The pretreatment method for tea saponin is as follows: tea saponin and ethyl chloroacetate are mixed at a mass ratio of 1:(9-11), stirred at 20-30℃ and 200rpm for 8-12 minutes, and then placed in a sealed reaction vessel. The temperature is increased to 55-65℃ at a rate of 3-5℃ / min, and the mixture is stirred at 250rpm for 1.5-2 hours. After the reaction is completed, the mixture is naturally cooled to room temperature and then rotary evaporated at 45-55℃ and -0.08MPa for 30-40 minutes. The solid product obtained by rotary evaporation is purified by recrystallization with ethanol, and finally vacuum dried at 55-65℃ and 0.09MPa for 1.5-2.5 hours to obtain pretreated tea saponin.

6. The high-efficiency thermal insulation clothing fabric according to claim 1, characterized in that, The preparation method of the additive is as follows: xylan powder is added to an 8-12% sodium hydroxide aqueous solution at a mass ratio of 1:(15-17), stirred at 35-45℃ and 250rpm for 30-50min, then sodium chloroacetate is added, and the temperature is raised to 55-65℃ at a rate of 2-4℃ / min and reacted at a constant temperature for 2-3h. After the reaction is completed, the pH value of the system is adjusted to neutral, and the precipitate is allowed to stand for 1-2h. The precipitate is collected by filtration and washed 3-5 times with deionized water. The precipitate is then vacuum dried at 55-65℃ and 0.09MPa for 3-5h and pulverized to 15μm to obtain the additive. The mass of sodium chloroacetate is 0.8-1.2 times the mass of xylan powder.

7. The high-efficiency thermal insulation clothing fabric according to claim 1, characterized in that, The polyester resin is PET polyester chips, which are vacuum dried at 120-130℃ and 0.09MPa for 8-12 hours before being used to prepare high-efficiency warm clothing fabric.

8. The high-efficiency thermal insulation clothing fabric according to claim 1, characterized in that, The plasticizer is polyethylene glycol diacrylate, and the compatibilizer is POE-g-MAH.

9. The high-efficiency thermal insulation clothing fabric according to claim 1, characterized in that, The antioxidant is antioxidant 1010, and the lubricant is zinc stearate.

10. The method for preparing the high-efficiency thermal insulation clothing fabric according to claim 1, characterized in that, Includes the following steps: S1: Add polyester resin and composite powder into a high-speed mixer and stir at 20-30℃ and 350-450rpm for 15-20min to obtain a premix. Slowly add composite additive liquid to the premix at a rate of 2-3mL / s, and then add plasticizer, compatibilizer, antioxidant and lubricant in sequence. Heat to 40-50℃ at a rate of 2-4℃ / min and continue stirring for 25-35min to obtain a mixture. S2: The mixture is fed into a twin-screw extruder for melt extrusion. The temperatures of each section are set as follows: feeding section 215-225℃, compression section 225-235℃, metering section 235-245℃, screw speed 250-350 rpm. After water cooling and pelletizing, it is placed in an oven at 55-65℃ and dried for 2.5-3.5 hours to obtain polyester masterbatch. S3: Polyester masterbatch is produced by melt spinning process, with spinning temperature set at 230-250℃, spinning speed at 800-1200m / min, air-cooled to room temperature at 20-25℃, and draw ratio at 1.8-2.2 times to obtain polyester filament; S4: Polyester filaments are hot-air low-temperature set at 80-90℃ for 10-15 minutes, with an ambient humidity of 40-50%, and then cooled and wound to obtain polyester fibers. The polyester fibers are then warped, woven, dyed and finished, and softened and set to obtain a highly efficient and warm clothing fabric.

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