Method for preparing cool microcapsules, cool polyester fiber fabric and method for producing the same

Abstract

The present application belongs to the technical field of household textiles, and particularly relates to a preparation method of cool microcapsules, cool polyester fiber fabric and a production method thereof. The preparation method of the cool microcapsules comprises the following steps: adding polymethyl methacrylate and an emulsifier into water to obtain a dispersion liquid; adding xylitol into the dispersion liquid to obtain a suspension liquid; and performing spray drying on the suspension liquid to obtain the cool microcapsules. In the present application, the xylitol is prepared into microcapsules, so that the technical problem that the xylitol is easily dissolved in water and the washability of the fabric is poor (i.e. the cool function rapidly decreases after washing) in the prior art is solved.

Description

Technical Field

[0001] This invention belongs to the field of textile technology, specifically relating to a method for preparing cooling microcapsules, a cooling polyester fiber fabric, and a method for producing the same. Background Technology

[0002] In recent years, with social development and technological progress, people have increasingly higher requirements for textiles, such as the desire for superior comfort, especially in the hot summer. Existing cooling materials are prepared by adding nano-sized natural mica, shells, graphene, and other substances with high thermal conductivity to the spinning solution to create cooling fibers. This method has a long preparation cycle and high production costs. CN202110830599.1 proposes a cooling finishing agent that imparts a cooling sensation to fabrics through post-treatment modification, giving it a strong competitive advantage in the market. This technology uses xylitol as the main cooling functional agent, leveraging its endothermic reaction with water to give the fabric a good and lasting cooling sensation. However, xylitol is easily soluble in water, and this finishing agent results in poor washability of the fabric (i.e., the cooling function rapidly decreases after washing). Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a method for preparing cooling microcapsules, a cooling polyester fabric and a method for producing the same, so as to solve the technical problem of poor washability of existing cooling fabrics (i.e., the cooling function rapidly declines after washing).

[0004] In a first aspect, the present invention provides a method for producing cooling microcapsules, comprising the following steps:

[0005] Polymethyl methacrylate and emulsifier are added to water to obtain a dispersion;

[0006] Xylitol was added to the dispersion to obtain a suspension, and the suspension was spray-dried to obtain the cooling microcapsules.

[0007] Optionally, the mass ratio of polymethyl methacrylate to water is 5-8:1, preferably 6-8:1.

[0008] Optionally, the emulsifier includes alkylphenol polyoxyethylene ether.

[0009] Optionally, the mass ratio of polymethyl methacrylate to emulsifier is 5-8:0.4-1.2, preferably 5-8:0.6-1.2.

[0010] Optionally, the mass ratio of polymethyl methacrylate to xylitol is 5-8:1, preferably 4-6:1.

[0011] Optionally, the inlet air temperature of the spray dryer is 100-120℃, preferably 105-120℃; the outlet air temperature is 80-100℃, preferably 85-120℃; and the feed flow rate is 3.5-7.5mL / min, preferably 3.5-6mL / min.

[0012] Optionally, the emulsifier may further include fatty alcohol polyoxyethylene ether.

[0013] Optionally, the mass ratio of the fatty alcohol polyoxyethylene ether to the alkylphenol polyoxyethylene ether is 2-4:4-9, preferably 2-4:5-9.

[0014] Secondly, the present invention provides a method for producing a cooling polyester fiber fabric, comprising the following steps:

[0015] S1. Preparation of cooling microcapsules:

[0016] Polymethyl methacrylate and emulsifier are added to water to obtain a dispersion;

[0017] Xylitol was added to the dispersion to obtain a suspension, and the suspension was spray-dried to obtain the cooling microcapsules;

[0018] S2. Preparation of finishing solution: Add penetrant and the cooling microcapsules to acetic acid, and stir evenly to obtain finishing solution;

[0019] S3. Preparation of cool-feeling polyester fiber fabric: The greige fabric made of polyester fiber is immersed in the finishing solution, dipped and rubbed twice, and then dried and baked to obtain the cool-feeling polyester fiber fabric.

[0020] Optionally, the concentration of the penetrant in the finishing solution in step S2 is 0.8wt%-1.3wt%, preferably 0.9wt%-1.3wt%.

[0021] Optionally, in step S2, the mass ratio of the penetrant to the cooling microcapsule is 0.8-1.3:15-20, preferably 0.9-1.3:15-20.

[0022] Optionally, in step S2, the penetrant comprises dioctyl sulfosuccinate salt.

[0023] Optionally, in step S2, the penetrant further includes alkylbenzene sulfate.

[0024] Optionally, in step S2, the mass ratio of the alkylbenzene sulfate to the dioctyl sulfonated succinate is 1:3-7, preferably 1:4-7.

[0025] Optionally, in step S3, the mass ratio of the greige fabric to the finishing liquid is 1:15-20, preferably 1:16-20.

[0026] Optionally, in step S3, the slurry yield is 70wt%-75wt%, preferably 72wt%-75wt%.

[0027] Optionally, in step S3, the drying temperature is 50-55°C, preferably 72-75°C.

[0028] Optionally, in step S3, the drying time is 5-10 minutes, preferably 6-10 minutes.

[0029] Optionally, in step S3, the drying time is 110-115℃, preferably 112-115℃; the drying time is 1-3 min, preferably 1.5-3 min.

[0030] Thirdly, the present invention also provides a cool-feeling polyester fiber fabric produced by the production method described above.

[0031] As described above, the preparation method of the cooling microcapsules, the cooling polyester fiber fabric, and the production method thereof of the present invention have the following beneficial effects:

[0032] (1) This application solves the technical problem in the prior art that xylitol is easily soluble in water and the fabric has poor washability (i.e., the cooling function decreases rapidly after washing) by preparing xylitol into microcapsules.

[0033] (2) In this application, the combination of fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene ether can reduce the surface tension between water and polymethyl methacrylate, thereby increasing the encapsulation rate of xylitol and further enhancing the cooling function of the polyester fiber fabric.

[0034] (3) In this application, the combination of alkylbenzene sulfate and dioctyl sulfosuccinate can improve the surface activity of the penetrant, further promote the penetrant to penetrate into the fabric, and thus further enhance the cooling function of the polyester fiber fabric. Detailed Implementation

[0035] The present invention will be further illustrated by specific examples below. However, it should be noted that the specific material ratios, process conditions and results described in the embodiments of the present invention are only for illustrating the present invention and cannot be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

[0036] This invention provides a method for preparing cooling microcapsules, comprising the following steps:

[0037] Polymethyl methacrylate and emulsifier are added to water at a mass ratio of 5-8:0.4-1.2 to obtain a dispersion; wherein the mass ratio of polymethyl methacrylate to water is 5-8:1, and the emulsifier includes alkylphenol polyoxyethylene ether;

[0038] Xylitol was added to the dispersion to obtain a suspension. The suspension was then spray-dried at an inlet air temperature of 100-120℃, an outlet air temperature of 80-100℃, and a feed flow rate of 3.5-7.5 mL / min to obtain cooling microcapsules.

[0039] In another exemplary embodiment of the present invention, the emulsifier further includes fatty alcohol polyoxyethylene ether, wherein the mass ratio of fatty alcohol polyoxyethylene ether to alkylphenol polyoxyethylene ether is 2-4:4-9.

[0040] The present invention also provides a method for producing a cooling polyester fiber fabric, comprising the following steps:

[0041] S1. Preparation of cooling microcapsules:

[0042] Polymethyl methacrylate and emulsifier are added to water at a mass ratio of 5-8:0.4-1.2 to obtain a dispersion; wherein the mass ratio of polymethyl methacrylate to water is 5-8:1, and the emulsifier includes alkylphenol polyoxyethylene ether;

[0043] Xylitol was added to the dispersion to obtain a suspension. The suspension was spray-dried at an inlet air temperature of 100-120℃, an outlet air temperature of 80-100℃, and a feed flow rate of 3.5-7.5 mL / min to obtain cooling microcapsules.

[0044] The mass ratio of polymethyl methacrylate to xylitol is 5-8:1;

[0045] S2. Preparation of finishing solution: Add penetrant and cooling microcapsules to acetic acid and stir evenly to obtain a finishing solution with a penetrant concentration of 0.8wt%-1.3wt%;

[0046] The mass ratio of the penetrant to the cooling microcapsules is 0.8-1.3:15-20, and the penetrant includes dioctyl sulfonated succinate salt;

[0047] S3. Preparation of Cooling Polyester Fiber Fabric: The greige fabric made of polyester fiber is immersed in a finishing solution with a weight of 15-20 times its weight, and then dipped and rubbed twice with a rub-to-liquid ratio of 70wt%-75wt%. It is then dried at 50-55℃ for 5-10 minutes, and then dried at 110-115℃ for 1-3 minutes to obtain the cooling polyester fiber fabric.

[0048] In another exemplary embodiment of the present invention, in step S2, the penetrant further includes alkylbenzene sulfate, wherein the mass ratio of alkylbenzene sulfate to dioctyl sulfosuccinate is 1:3-7.

[0049] In another aspect, the present invention also provides a cool-feeling polyester fiber fabric produced by the production method described above.

[0050] The present invention will be described in detail below through specific examples and embodiments. It should also be understood that the following embodiments are only for specific illustration of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention are within the scope of protection of the present invention. The specific process parameters, etc., in the following examples are merely examples within a suitable range; that is, those skilled in the art can make appropriate selections within the appropriate range based on the description herein, and are not intended to be limited to the specific values ​​in the examples below.

[0051] Example 1

[0052] A method for producing a cooling polyester fiber fabric, the specific steps of which are as follows:

[0053] S1. Preparation of cooling microcapsules:

[0054] Polymethyl methacrylate and emulsifier cetylphenol polyoxyethylene ether were added to water at a mass ratio of 8:0.4 to obtain a dispersion; wherein the mass ratio of polymethyl methacrylate to water was 8:1.

[0055] Xylitol was added to the dispersion to obtain a suspension. The suspension was then spray-dried at an inlet air temperature of 100°C, an outlet air temperature of 80°C, and a feed flow rate of 3.5 mL / min to obtain cooling microcapsules.

[0056] The mass ratio of polymethyl methacrylate to xylitol is 8:1;

[0057] S2. Preparation of finishing solution: Add sodium dioctyl sulfonate and cooling microcapsules to acetic acid and stir evenly to obtain a finishing solution with a concentration of 0.8 wt% sodium dioctyl sulfonate as the penetrant.

[0058] The mass ratio of sodium dioctyl sulfosuccinate, the penetrant, to the cooling microcapsules is 0.8:20.

[0059] S3. Preparation of cool-feeling polyester fiber fabric: Polyester fibers are spun (yarn count is 60S×60S) and woven to obtain a greige fabric with a warp density of 180 threads / inch and a weft density of 100 threads / inch.

[0060] The greige fabric was immersed in a finishing solution with a weight of 20 times its weight, and then dipped and rubbed twice with a rub-out ratio of 75 wt%. It was then dried at 50°C for 10 min and then dried at 115°C for 3 min to obtain a cool-feeling polyester fiber fabric.

[0061] Example 2

[0062] A method for producing a cooling polyester fiber fabric, the specific steps of which are as follows:

[0063] S1. Preparation of cooling microcapsules:

[0064] Polymethyl methacrylate and emulsifier cetylphenol polyoxyethylene ether were added to water at a mass ratio of 5:1.2 to obtain a dispersion; wherein the mass ratio of polymethyl methacrylate to water was 5:1.

[0065] Xylitol was added to the dispersion to obtain a suspension. The suspension was spray-dried at an inlet air temperature of 120°C, an outlet air temperature of 100°C, and a feed flow rate of 7.5 mL / min to obtain cooling microcapsules.

[0066] The mass ratio of polymethyl methacrylate to xylitol is 5:1;

[0067] S2. Preparation of finishing solution: Add sodium dioctyl sulfonate and cooling microcapsules to acetic acid and stir evenly to obtain a finishing solution with a concentration of 1.3 wt% sodium dioctyl sulfonate as the penetrant.

[0068] The mass ratio of sodium dioctyl sulfosuccinate, the penetrant, to the cooling microcapsules is 1.3:15.

[0069] S3. Preparation of cool-feeling polyester fiber fabric: Polyester fibers are spun (yarn count is 60S×60S) and woven to obtain a greige fabric with a warp density of 180 threads / inch and a weft density of 100 threads / inch.

[0070] The greige fabric is immersed in a finishing solution with a weight of 15 times its weight, and then dipped and rubbed twice with a rub-out rate of 70 wt%. It is then dried at 55°C for 5 min and then dried at 110°C for 1 min to obtain a cool-feeling polyester fiber fabric.

[0071] Example 3

[0072] A method for producing a cooling polyester fiber fabric, the specific steps of which are as follows:

[0073] S1. Preparation of cooling microcapsules:

[0074] Polymethyl methacrylate and emulsifier cetylphenol polyoxyethylene ether were added to water at a mass ratio of 6:0.8 to obtain a dispersion; wherein the mass ratio of polymethyl methacrylate to water was 6:1.

[0075] Xylitol was added to the dispersion to obtain a suspension. The suspension was spray-dried at an inlet air temperature of 110℃, an outlet air temperature of 90℃, and a feed flow rate of 5mL / min to obtain cooling microcapsules.

[0076] The mass ratio of polymethyl methacrylate to xylitol is 6:1;

[0077] S2. Preparation of finishing solution: Add sodium dioctyl sulfonate and cooling microcapsules to acetic acid and stir evenly to obtain a finishing solution with a concentration of 1 wt% of sodium dioctyl sulfonate.

[0078] The mass ratio of sodium dioctyl sulfosuccinate, the penetrant, to the cooling microcapsules is 1:17.

[0079] S3. Preparation of cool-feeling polyester fiber fabric: Polyester fibers are spun (yarn count is 60S×60S) and woven to obtain a greige fabric with a warp density of 180 threads / inch and a weft density of 100 threads / inch.

[0080] The greige fabric was immersed in a finishing solution with a weight of 18 times its weight, and then dipped and rubbed twice with a rub-out ratio of 72 wt%. It was then dried at 53°C for 8 minutes and then dried at 112°C for 2 minutes to obtain a cool-feeling polyester fiber fabric.

[0081] Example 4

[0082] A method for producing a cooling polyester fiber fabric, the specific steps of which are as follows:

[0083] S1. Preparation of cooling microcapsules:

[0084] Polymethyl methacrylate and emulsifier were added to water at a mass ratio of 6:0.8 to obtain a dispersion.

[0085] The emulsifier is composed of octadecyl alcohol polyoxyethylene ether and hexadecylphenol polyoxyethylene ether in a mass ratio of 2:8.

[0086] The mass ratio of emulsifier to water is 6:1;

[0087] Xylitol was added to the dispersion to obtain a suspension. The suspension was spray-dried at an inlet air temperature of 110℃, an outlet air temperature of 90℃, and a feed flow rate of 5mL / min to obtain cooling microcapsules.

[0088] The mass ratio of polymethyl methacrylate to xylitol is 6:1;

[0089] S2. Preparation of finishing solution: Add sodium dioctyl sulfonate and cooling microcapsules to acetic acid and stir evenly to obtain a finishing solution with a concentration of 1 wt% of sodium dioctyl sulfonate.

[0090] The mass ratio of sodium dioctyl sulfosuccinate, the penetrant, to the cooling microcapsules is 1:17.

[0091] S3. Preparation of cool-feeling polyester fiber fabric: Polyester fibers are spun (yarn count is 60S×60S) and woven to obtain a greige fabric with a warp density of 180 threads / inch and a weft density of 100 threads / inch.

[0092] The greige fabric was immersed in a finishing solution with a weight of 18 times its weight, and then dipped and rubbed twice with a rub-out ratio of 72 wt%. It was then dried at 53°C for 8 minutes and then dried at 112°C for 2 minutes to obtain a cool-feeling polyester fiber fabric.

[0093] The difference between this embodiment and Embodiment 3 is that the emulsifier is composed of octadecyl alcohol polyoxyethylene ether and hexadecylphenol polyoxyethylene ether in a mass ratio of 2:8.

[0094] Example 5

[0095] A method for producing a cooling polyester fiber fabric, the specific steps of which are as follows:

[0096] S1. Preparation of cooling microcapsules:

[0097] Polymethyl methacrylate and emulsifier were added to water at a mass ratio of 6:0.8 to obtain a dispersion.

[0098] The emulsifier is composed of octadecyl alcohol polyoxyethylene ether and hexadecylphenol polyoxyethylene ether in a mass ratio of 4:4.

[0099] The mass ratio of emulsifier to water is 6:1;

[0100] Xylitol was added to the dispersion to obtain a suspension. The suspension was spray-dried at an inlet air temperature of 110℃, an outlet air temperature of 90℃, and a feed flow rate of 5mL / min to obtain cooling microcapsules.

[0101] The mass ratio of polymethyl methacrylate to xylitol is 6:1;

[0102] S2. Preparation of finishing solution: Add sodium dioctyl sulfonate and cooling microcapsules to acetic acid and stir evenly to obtain a finishing solution with a concentration of 1 wt% of sodium dioctyl sulfonate.

[0103] The mass ratio of sodium dioctyl sulfosuccinate, the penetrant, to the cooling microcapsules is 1:17.

[0104] S3. Preparation of cool-feeling polyester fiber fabric: Polyester fibers are spun (yarn count is 60S×60S) and woven to obtain a greige fabric with a warp density of 180 threads / inch and a weft density of 100 threads / inch.

[0105] The greige fabric was immersed in a finishing solution with a weight of 18 times its weight, and then dipped and rubbed twice with a rub-out ratio of 72 wt%. It was then dried at 53°C for 8 minutes and then dried at 112°C for 2 minutes to obtain a cool-feeling polyester fiber fabric.

[0106] The difference between this embodiment and Embodiment 3 is that the emulsifier is composed of octadecyl alcohol polyoxyethylene ether and hexadecylphenol polyoxyethylene ether in a mass ratio of 4:4.

[0107] Example 6

[0108] A method for producing a cooling polyester fiber fabric, the specific steps of which are as follows:

[0109] S1. Preparation of cooling microcapsules:

[0110] Polymethyl methacrylate and emulsifier cetylphenol polyoxyethylene ether were added to water at a mass ratio of 6:0.8 to obtain a dispersion; wherein the mass ratio of polymethyl methacrylate to water was 6:1.

[0111] Xylitol was added to the dispersion to obtain a suspension. The suspension was spray-dried at an inlet air temperature of 110℃, an outlet air temperature of 90℃, and a feed flow rate of 5mL / min to obtain cooling microcapsules.

[0112] The mass ratio of polymethyl methacrylate to xylitol is 6:1;

[0113] S2. Preparation of finishing solution: Add penetrant and cooling microcapsules to acetic acid and stir evenly to obtain a finishing solution with a penetrant concentration of 1 wt%;

[0114] The penetrant is composed of sodium dodecylbenzene sulfate and sodium dioctyl sulfosuccinate in a mass ratio of 1:3.

[0115] The mass ratio of penetrant to cooling microcapsule is 1:17;

[0116] S3. Preparation of cool-feeling polyester fiber fabric: Polyester fibers are spun (yarn count is 60S×60S) and woven to obtain a greige fabric with a warp density of 180 threads / inch and a weft density of 100 threads / inch.

[0117] The greige fabric was immersed in a finishing solution with a weight of 18 times its weight, and then dipped and rubbed twice with a rub-out ratio of 72 wt%. It was then dried at 53°C for 8 minutes and then dried at 112°C for 2 minutes to obtain a cool-feeling polyester fiber fabric.

[0118] The difference between this embodiment and Embodiment 3 is that the penetrant is composed of sodium dodecylbenzene sulfate and sodium dioctyl sulfosuccinate in a mass ratio of 1:3.

[0119] Example 7

[0120] A method for producing a cooling polyester fiber fabric, the specific steps of which are as follows:

[0121] S1. Preparation of cooling microcapsules:

[0122] Polymethyl methacrylate and emulsifier cetylphenol polyoxyethylene ether were added to water at a mass ratio of 6:0.8 to obtain a dispersion; wherein the mass ratio of polymethyl methacrylate to water was 6:1.

[0123] Xylitol was added to the dispersion to obtain a suspension. The suspension was spray-dried at an inlet air temperature of 110℃, an outlet air temperature of 90℃, and a feed flow rate of 5mL / min to obtain cooling microcapsules.

[0124] The mass ratio of polymethyl methacrylate to xylitol is 6:1;

[0125] S2. Preparation of finishing solution: Add penetrant and cooling microcapsules to acetic acid and stir evenly to obtain a finishing solution with a penetrant concentration of 1 wt%;

[0126] The penetrant is composed of sodium dodecylbenzene sulfate and sodium dioctyl sulfosuccinate in a mass ratio of 1:7.

[0127] The mass ratio of penetrant to cooling microcapsule is 1:17;

[0128] S3. Preparation of cool-feeling polyester fiber fabric: Polyester fibers are spun (yarn count is 60S×60S) and woven to obtain a greige fabric with a warp density of 180 threads / inch and a weft density of 100 threads / inch.

[0129] The greige fabric was immersed in a finishing solution with a weight of 18 times its weight, and then dipped and rubbed twice with a rub-out ratio of 72 wt%. It was then dried at 53°C for 8 minutes and then dried at 112°C for 2 minutes to obtain a cool-feeling polyester fiber fabric.

[0130] The difference between this embodiment and the previous embodiment is that the penetrant is composed of sodium dodecylbenzene sulfate and sodium dioctyl sulfosuccinate in a mass ratio of 1:7.

[0131] Comparative Example 1

[0132] The fabric is from the same source as in Example 3.

[0133] Performance testing

[0134] The fabrics prepared in Examples 1-7 and Comparative Example 1 were sampled in the form of 500mm*500mm. The cooling coefficient of the cooling polyester fiber fabrics prepared in Examples 1-7 and the greige fabric of Comparative Example 1 was tested according to GBT 35263-2017 "Test and Evaluation of Cooling Performance of Textiles in Contact". The temperature of the heat testing plate was 35℃ and the temperature of the sample stage was 20℃. The results are shown in Table 1.

[0135] The samples were then machine washed at room temperature for 10 minutes, with the water level at full capacity, a stirring speed of 180 r / min, a spin-drying speed of 650 r / min, and a spin-drying time of 6 minutes. After that, they were air-dried. This washing-drying cycle was repeated 50 times. The cooling coefficient of each sample was then tested again according to GB / T 35263-2017 "Test and Evaluation of Instant Cooling Performance of Textiles in Contact". The temperature of the thermal test plate was 35℃ and the temperature of the sample stage was 20℃. The results are shown in Table 1.

[0136] Table 1 Test Results

[0137] Group Cooling coefficient (before washing), J / (cm 2 ·s) Cooling coefficient (after washing), J / (cm 2 ·s) Example 1 0.21 0.20 Example 2 0.25 0.25 Example 3 0.22 0.21 Example 4 0.28 0.27 Example 5 0.29 0.29 Example 6 0.27 0.27 Example 7 0.28 0.27 Comparative Example 1 0.11 0.10

[0138] As shown in Table 1, compared with Comparative Example 1, the cooling coefficient of the cooling polyester fiber fabrics prepared in Examples 1-7 was significantly improved. This indicates that the cooling polyester fiber fabric of the present invention has excellent cooling function.

[0139] As shown in Table 1, the cooling coefficient of the cooling polyester fiber fabrics prepared in Examples 1-7 did not change significantly before and after washing. This result indicates that the present invention solves the technical problem in the prior art that xylitol is easily soluble in water and the fabric has poor washability (i.e., the cooling function decreases rapidly after washing) by preparing xylitol into microcapsules.

[0140] As shown in Table 1, compared with Example 3 (before washing) (where the emulsifier was hexadecylphenol polyoxyethylene ether), the cooling coefficients of the cooling polyester fiber fabrics prepared in Example 4 (before washing) (where the emulsifier was composed of octadecyl alcohol polyoxyethylene ether and hexadecylphenol polyoxyethylene ether in a mass ratio of 2:8) and Example 5 (before washing) (where the emulsifier was composed of octadecyl alcohol polyoxyethylene ether and hexadecylphenol polyoxyethylene ether in a mass ratio of 4:4) were increased by approximately 27.3% and 31.8%, respectively. This result indicates that in this application, the combined use of fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene ether can reduce the surface tension between water and polymethyl methacrylate, thereby increasing the encapsulation rate of xylitol and further enhancing the cooling function of the prepared polyester fiber fabric.

[0141] As shown in Table 1, compared with Example 3 (before washing) (using sodium dioctyl sulfosuccinate as the penetrant), the cooling coefficients of the cool-feeling polyester fiber fabrics prepared in Example 6 (before washing) (the penetrant consisted of sodium dodecylbenzene sulfate and sodium dioctyl sulfosuccinate in a mass ratio of 1:3) and Example 7 (before washing) (the penetrant consisted of sodium dodecylbenzene sulfate and sodium dioctyl sulfosuccinate in a mass ratio of 1:7) were increased by approximately 22.7% and 27.3%, respectively. This result indicates that in this application, the combined use of alkylbenzene sulfate and sodium dioctyl sulfosuccinate can improve the surface activity of the penetrant, further promoting its penetration into the fabric and thus further enhancing the cooling function of the resulting polyester fiber fabric.

[0142] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for preparing a cooling microcapsule, characterized in that, Includes the following steps: Polymethyl methacrylate and emulsifier are added to water to obtain a dispersion; Xylitol was added to the dispersion to obtain a suspension, and the suspension was spray-dried to obtain the cooling microcapsules; The mass ratio of polymethyl methacrylate to water is 5-8:1; the mass ratio of polymethyl methacrylate to emulsifier is 5-8:0.4-1.2; the mass ratio of polymethyl methacrylate to xylitol is 5-8:1; the emulsifier includes alkylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether; the mass ratio of fatty alcohol polyoxyethylene ether to alkylphenol polyoxyethylene ether is 2-4:4-8.

2. The preparation method according to claim 1, characterized in that, The spray dryer has an inlet air temperature of 100-120℃, an outlet air temperature of 80-100℃, and a feed flow rate of 3.5-7.5 mL / min.

3. A method for producing a cooling polyester fiber fabric, characterized in that, Includes the following steps: S1. Preparation of cooling microcapsules: Polymethyl methacrylate and emulsifier are added to water to obtain a dispersion; Xylitol was added to the dispersion to obtain a suspension, and the suspension was spray-dried to obtain the cooling microcapsules; The mass ratio of polymethyl methacrylate to water is 5-8:1; the mass ratio of polymethyl methacrylate to emulsifier is 5-8:0.4-1.2; and the mass ratio of polymethyl methacrylate to xylitol is 5-8:

1. S2. Preparation of finishing solution: Add penetrant and the cooling microcapsules to acetic acid, and stir evenly to obtain finishing solution; The penetrant comprises dioctyl sulfonate succinate and alkylbenzene sulfate, wherein the mass ratio of alkylbenzene sulfate to dioctyl sulfonate succinate is 1:3-7. The mass ratio of the penetrant to the cooling microcapsules is 0.8-1.3:15-20; S3. Preparation of cool-feeling polyester fiber fabric: The greige fabric made of polyester fiber is immersed in the finishing solution, dipped and rubbed twice, and then dried and baked to obtain the cool-feeling polyester fiber fabric.

4. The production method according to claim 3, characterized in that, In the finishing solution described in step S2, the concentration of the penetrant is 0.8wt%-1.3wt%.

5. The production method according to claim 3, characterized in that, In step S3, the mass ratio of the greige fabric to the finishing solution is 1:15-20; And / or, in step S3, the slurry yield is 70wt%-75wt%.

6. The production method according to claim 3, characterized in that, In step S3, the drying temperature is 50-55℃; And / or, in step S3, the drying time is 5-10 minutes; And / or, in step S3, the drying time is 110-115°C and the drying duration is 1-3 minutes.

7. Cool-feeling polyester fiber fabric produced by the production method according to any one of claims 3-6.