Temperature-sensitive and humidity-regulating fiber and preparation method thereof

Abstract

A temperature-sensitive and humidity-regulating fiber includes a hydrophilic material and a temperature-sensitive material. When the temperature-sensitive material has a lower critical solution temperature (LCST) between 31.2°C and 32.5°C at a light transmittance of 3% to 80%, wherein the wavelength of the light is between 450nm and 550nm. By configuring the hydrophilic material and the temperature-sensitive material in the temperature-sensitive and humidity-regulating fiber, the temperature-sensitive and humidity-regulating fiber can have the characteristics of quick drying, cool feeling and reduced heat loss, thereby stably maintaining the thermal comfort of the clothing made therefrom.

Description

Technical Field

[0001] The present disclosure relates to a textile fiber, and more particularly to a temperature-sensitive and humidity-regulating fiber and a preparation method thereof. Background Art

[0002] In recent years, as people's requirements for quality of life have gradually improved, the comfort of clothing has become an important consideration when purchasing clothing. Functional clothing that adjusts to the temperature difference between autumn and winter, air-conditioned environments, and temperature conditions and body temperature changes during exercise and sweating has become an emerging product in today's textile market.

[0003] Textiles used in sportswear need to provide users with quick-drying, cool feeling and reduced heat loss characteristics when external environmental conditions change, in order to maintain thermal comfort of the textiles. However, traditional moisture-wicking clothing is mainly made by passive fabric structure design and post-finishing processing technology (single-sided or double-sided coating), so there is a disadvantage of losing the temperature and humidity regulation function due to stuffiness under saturated humidity during exercise. Summary of the invention

[0004] The present disclosure provides a temperature-sensitive and humidity-regulating fiber and a preparation method thereof. By configuring the hydrophilic material and the temperature-sensitive material in the temperature-sensitive and humidity-regulating fiber, the temperature-sensitive and humidity-regulating fiber can have the characteristics of quick drying, cool feeling and reduced heat loss, thereby stably maintaining the thermal comfort of the clothing made therefrom.

[0005] According to some embodiments of the present disclosure, the temperature-sensitive and humidity-regulating fiber includes a hydrophilic material and a temperature-sensitive material. The temperature-sensitive material has a lower critical solution temperature (LCST) between 31.2° C. and 32.5° C. when the light transmittance is 3% to 80%, and the wavelength of the light is between 450 nm and 550 nm.

[0006] In some embodiments of the present disclosure, the weight ratio of the hydrophilic material to the thermosensitive material is between 3:7 and 7:3.

[0007] In some embodiments of the present disclosure, when the hydrophilic material and the thermosensitive material are uniformly mixed at a weight ratio of 3:7 to form a thermosensitive humidity regulating material, the thermosensitive humidity regulating material has a lower critical solution temperature between 31.2° C. and 33.5° C. when the light transmittance is 3% to 80%.

[0008] In some embodiments of the present disclosure, when the hydrophilic material and the thermosensitive material are uniformly mixed in a weight ratio of 1:1 to form a thermosensitive humidity-controlling material, the thermosensitive humidity-controlling material has a lower critical solution temperature between 31.2° C. and 34.5° C. when the light transmittance is 3% to 80%.

[0009] In some embodiments of the present disclosure, when the hydrophilic material and the thermosensitive material are uniformly mixed at a weight ratio of 7:3 to form a thermosensitive humidity regulating material, the thermosensitive humidity regulating material has a lower critical solution temperature between 31.2° C. and 36.0° C. when the light transmittance is 3% to 80%.

[0010] In some embodiments of the present disclosure, based on the total weight of the temperature-sensitive and humidity-regulating fiber, the total weight of the hydrophilic material and the temperature-sensitive material is between 0.8 wt % and 1.2 wt %.

[0011] According to other embodiments of the present disclosure, the preparation method of the temperature-sensitive and humidity-controlling fiber includes the following steps. An intrinsic temperature-sensitive and humidity-controlling masterbatch is provided, and the intrinsic temperature-sensitive and humidity-controlling masterbatch includes a hydrophilic material, a temperature-sensitive material, and a polyester material, wherein the temperature-sensitive material has a lower critical solution temperature (LCST) between 31.2°C and 32.5°C when the light transmittance is 3% to 80%, and the wavelength of the light is between 450nm and 550nm. A substrate masterbatch is provided, and the substrate masterbatch includes a polyester material. The intrinsic temperature-sensitive and humidity-controlling masterbatch and the substrate masterbatch are uniformly mixed to obtain the temperature-sensitive and humidity-controlling fiber.

[0012] In some embodiments of the present disclosure, the temperature-sensitive material includes a structure represented by formula (1):

[0013]

[0014] Formula (1), wherein in Formula (1), X includes a structure represented by Formula (2) or Formula (3):

[0015]

[0016] The molar ratio of x to y is between 9:1 and 1:3, n is an integer between 7 and 120, and m is an integer between 10 and 1000.

[0017] In some embodiments of the present disclosure, the method for preparing the temperature-sensitive and humidity-regulating fiber further includes the following steps: providing a temperature-sensitive material, which includes a step of modifying a hydrophilic material to form a temperature-sensitive material.

[0018] In some embodiments of the present disclosure, the preparation method of the temperature-sensitive and humidity-controlling fiber further includes the following steps: uniformly mixing the hydrophilic material, the temperature-sensitive material and the polyester material, and performing a powder refining step, a powder dispersion step and a mixing and granulating step to form an intrinsic temperature-sensitive and humidity-controlling masterbatch, wherein the particle size of the temperature-sensitive material after the powder refining step and the powder dispersion step is between 1 μm and 500 μm.

[0019] According to the above embodiments of the present disclosure, since the temperature-sensitive and humidity-regulating fiber of the present disclosure includes a hydrophilic material and a temperature-sensitive material, and the temperature-sensitive material has a suitable low critical solution temperature, the temperature-sensitive and humidity-regulating fiber can be dried quickly at high temperatures to achieve a cooling function, and can slow down the drying rate of water at low temperatures to achieve a function of reducing heat loss, thereby maintaining body temperature. Thus, clothing made of the temperature-sensitive and humidity-regulating fiber of the present disclosure can provide stable thermal comfort to the user, and can be well applied to various moisture absorption and perspiration-wicking products. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the above and other objects, features, advantages and embodiments of the present disclosure more clearly understood, the accompanying drawings are described as follows:

[0021] Figure 1 A flow chart showing a method for preparing a temperature-sensitive and humidity-regulating fiber according to some embodiments of the present disclosure is shown;

[0022] Figure 2 A flow chart showing a method for preparing an intrinsic temperature-sensitive and humidity-regulating masterbatch according to some embodiments of the present disclosure is shown; and

[0023] Figure 3 A light transmittance-temperature relationship diagram of a temperature-sensitive material and a plurality of temperature-sensitive and humidity-controlling materials according to some embodiments of the present disclosure is shown;

[0024] Among them, the symbols are as follows:

[0025] S2, S4, S6, S8, S10, S20, S30: steps. DETAILED DESCRIPTION

[0026] The following will disclose multiple embodiments of the present disclosure with the accompanying drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present disclosure. That is, in some embodiments of the present disclosure, these practical details are not necessary and therefore should not be used to limit the present disclosure. In addition, in order to simplify the drawings, some conventional structures and elements will be depicted in a simple schematic manner in the drawings. In addition, for the convenience of readers, the sizes of the components in the drawings are not drawn according to the actual scale.

[0027] In this article, the structure of a polymer or group is sometimes represented by a skeleton formula. This representation can omit carbon atoms, hydrogen atoms, and carbon-hydrogen bonds. Of course, if the structural formula clearly shows atoms or atomic groups, the ones shown will prevail.

[0028] The present disclosure provides a temperature-sensitive and humidity-regulating fiber and a preparation method thereof. By configuring the hydrophilic material and the temperature-sensitive material in the temperature-sensitive and humidity-regulating fiber, the temperature-sensitive and humidity-regulating fiber can be dried quickly at high temperatures to achieve a cooling function, and can slow down the drying rate of water at low temperatures to achieve a function of reducing heat loss, thereby maintaining body temperature. In this way, clothing made of the temperature-sensitive and humidity-regulating fiber disclosed in the present disclosure can provide stable thermal comfort to the user.

[0029] It should be understood that for the sake of clarity and convenience of description, the present disclosure will first describe the preparation method of the temperature-sensitive and humidity-regulating fiber to specifically present the means for achieving the effects of the present disclosure. Figure 1 , which depicts a flow chart of a method for preparing a temperature-sensitive and humidity-controlling fiber according to some embodiments of the present disclosure. The method for preparing a temperature-sensitive and humidity-controlling fiber includes steps S10, S20, and S30. In step S10, an intrinsic temperature-sensitive and humidity-controlling masterbatch is provided. In step S20, a substrate masterbatch is provided. In step S30, the intrinsic temperature-sensitive and humidity-controlling masterbatch and the substrate masterbatch are uniformly mixed to obtain a temperature-sensitive and humidity-controlling fiber. In the following description, each of the above steps will be further explained.

[0030] Before performing step S10, a hydrophilic material, a temperature-sensitive material and a polyester material may be provided to form an intrinsic temperature-sensitive and humidity-controlling masterbatch, so as to provide the intrinsic temperature-sensitive and humidity-controlling masterbatch in the subsequent step S10. For details, please refer to Figure 2 , which depicts a flow chart of a method for preparing an intrinsic temperature-sensitive and humidity-controlling masterbatch according to some embodiments of the present disclosure. The method for preparing an intrinsic temperature-sensitive and humidity-controlling masterbatch may include steps S2, S4, S6, and S8. In step S2, a hydrophilic material is provided. In step S4, a temperature-sensitive material is provided. In step S6, a polyester material is provided. In step S8, the hydrophilic material, the temperature-sensitive material, and the polyester material are uniformly mixed to form an intrinsic temperature-sensitive and humidity-controlling masterbatch.

[0031] [Step S2: Providing a hydrophilic material]

[0032] In some embodiments, the hydrophilic material may include a structure represented by formula (I):

[0033]

[0034] Formula (I), and in Formula (I), the molar ratio of x to y is between 9:1 and 1:3, n is an integer between 7 and 120, and m is an integer between 10 and 1000. By adjusting the molar ratio of x to y and the values ​​of m and n, the compatibility of the hydrophilic material and the polyester material can be greatly improved, so that the subsequently formed temperature-sensitive and humidity-regulating fiber has good and stable hydrophilicity, thereby enhancing the moisture conductivity of the temperature-sensitive and humidity-regulating fiber, which is beneficial to the regulation and evaporation of moisture.

[0035] [Step S4: Providing temperature-sensitive material]

[0036] The temperature-sensitive material disclosed in the present invention has different light transmittances at different temperatures. In detail, when the temperature-sensitive material is at a relatively low temperature (e.g., 31.0°C), the temperature-sensitive material has a high light transmittance; and when the temperature-sensitive material is at a relatively high temperature (e.g., 33.0°C), the temperature-sensitive material has a low light transmittance. The above-mentioned characteristics of the temperature-sensitive material can be specifically presented by the lower critical solution temperature (LCST). In detail, as the temperature rises, the temperature-sensitive materials aggregate with each other, causing the light transmittance to decrease, and when the light transmittance drops to 3%, the degree of aggregation of the temperature-sensitive material hardly changes with the increase in temperature, and the temperature at this time is the maximum value of the lower critical solution temperature of the temperature-sensitive material; conversely, as the temperature drops, the temperature-sensitive materials disperse with each other, causing the light transmittance to increase, and when the light transmittance rises to 80%, the degree of dispersion of the temperature-sensitive material hardly changes with the decrease in temperature, and the temperature at this time is the minimum value of the lower critical solution temperature of the temperature-sensitive material. Specifically, the temperature-sensitive material disclosed herein has a low critical solution temperature between 31.2°C and 32.5°C when the light transmittance is 3% to 80%, wherein the wavelength of the light is between 450nm and 550nm. On the other hand, the temperature-sensitive material disclosed herein has different degrees of hydrophilicity at different temperatures. In detail, when the temperature-sensitive material is at a relatively low temperature, the temperature-sensitive material has strong hydrophilicity; and when the temperature-sensitive material is at a relatively high temperature, the temperature-sensitive material has weak hydrophilicity. Based on the above, since the temperature-sensitive material disclosed herein has a suitable low critical solution temperature and has different degrees of hydrophilicity at different temperatures, the subsequently formed temperature-sensitive and humidity-regulating fibers can be dried quickly at high temperatures to achieve a cooling function, and the drying rate of moisture can be slowed down at low temperatures to achieve a function of reducing heat loss.

[0037] It should be particularly noted that the method for measuring the lower critical solution temperature of the temperature-sensitive material includes the following steps. First, place a temperature-sensitive material with a volume of 4 ml into a sample bottle with a capacity of 5 ml at room temperature. Then, place the sample bottle into a UV / Visible spectrophotometer (model: JASCO V630). Subsequently, set the initial temperature of the UV / Visible spectrophotometer to 25°C and start measuring. Then, gradually increase the temperature to 36.5°C at a heating rate of 1°C / min, and record the light transmittance of the temperature-sensitive material at each temperature. After the above steps, the lower critical solution temperature of the temperature-sensitive material can be obtained.

[0038] In some embodiments, when a thermosensitive material is mixed with a hydrophilic material to form a thermosensitive and hygroscopic material, the light transmittance of the thermosensitive and hygroscopic material may change with temperature. In detail, when the thermosensitive and hygroscopic material is at a relatively low temperature (e.g., 31.0°C), the thermosensitive and hygroscopic material has a high light transmittance; and when the thermosensitive and hygroscopic material is at a relatively high temperature (e.g., 37.0°C), the thermosensitive and hygroscopic material has a low light transmittance. The above-mentioned characteristics of the thermosensitive and hygroscopic material can be specifically presented by a low critical solution temperature. For example, when a hydrophilic material and a thermosensitive material are uniformly mixed in a weight ratio of 3:7 to form a thermosensitive and hygroscopic material, the thermosensitive and hygroscopic material has a low critical solution temperature between 31.2°C and 33.5°C when the light transmittance is 3% to 80%. For another example, when the hydrophilic material and the thermosensitive material are uniformly mixed in a weight ratio of 1:1 to form a thermosensitive humidity-controlling material, the thermosensitive humidity-controlling material has a low critical solution temperature between 31.2°C and 34.5°C when the light transmittance is 3% to 80%. For another example, when the hydrophilic material and the thermosensitive material are uniformly mixed in a weight ratio of 7:3 to form a thermosensitive humidity-controlling material, the thermosensitive humidity-controlling material has a low critical solution temperature between 31.2°C and 36.0°C when the light transmittance is 3% to 80%. In addition, when the thermosensitive material and the hydrophilic material are mixed to form a thermosensitive humidity-controlling material, the hydrophilicity of the thermosensitive humidity-controlling material may change with temperature. In detail, when the thermosensitive humidity-controlling material is at a relatively low temperature, the thermosensitive humidity-controlling material has a strong hydrophilicity; and when the thermosensitive humidity-controlling material is at a relatively high temperature, the thermosensitive humidity-controlling material has a weak hydrophilicity. Based on the above, when the temperature-sensitive material and the hydrophilic material disclosed in the present invention are uniformly mixed at an appropriate weight ratio, the formed temperature-sensitive and humidity-regulating material can have a suitable and close lower critical solution temperature to that of the temperature-sensitive material. In other words, the addition of the hydrophilic material hardly affects the lower critical solution temperature of the temperature-sensitive material, and it can have different degrees of hydrophilicity at different temperatures. In this way, the temperature-sensitive and humidity-regulating fiber made of the temperature-sensitive material and the hydrophilic material can have the characteristics of quick drying, cool feeling and reduced heat loss, thereby stably maintaining the thermal comfort of the clothing made therefrom.

[0039] Please read first Figure 3 , which illustrates a light transmittance-temperature relationship diagram of a temperature-sensitive material and a plurality of temperature-sensitive and humidity-adjusting materials according to some embodiments of the present disclosure. In detail, Figure 3 Specifically presenting the relationship between the light transmittance and temperature of the temperature-sensitive material and the temperature-sensitive humidity-controlling material 1 to 3, wherein the weight ratio of the hydrophilic material to the temperature-sensitive material of the temperature-sensitive humidity-controlling material 1 is 3:7, the weight ratio of the hydrophilic material to the temperature-sensitive material of the temperature-sensitive humidity-controlling material 2 is 1:1, and the weight ratio of the hydrophilic material to the temperature-sensitive material of the temperature-sensitive humidity-controlling material 3 is 7:3. It should be understood that Figure 3 The measurement results presented were measured using the above-mentioned lower critical solution temperature measurement method, and the wavelength of the light used was 500nm. Figure 3It can be seen from the measurement results that the lower critical solution temperatures of the temperature-sensitive material and the temperature-sensitive and humidity-regulating materials 1 to 3 are all within the aforementioned appropriate range, thereby stably maintaining the thermal comfort of the clothing made therefrom.

[0040] In some embodiments, the temperature-sensitive material may include a structure represented by formula (1):

[0041]

[0042] Formula (1), wherein in Formula (1), X includes a structure represented by Formula (2) or Formula (3):

[0043]

[0044] The molar ratio of x to y is between 9:1 and 1:3, n is an integer between 7 and 120, and m is an integer between 10 and 1000. In some embodiments, the weight average molecular weight of the temperature-sensitive material may be between 10,000 and 150,000. By adjusting the molar ratio of x to y, the values ​​of m and n, and the range of the weight average molecular weight, the compatibility of the temperature-sensitive material and the polyester material can be greatly improved, so that the subsequently formed temperature-sensitive and humidity-regulating fiber can effectively change with the external environment temperature or body temperature, thereby dynamically adjusting the temperature and humidity.

[0045] In some embodiments, the temperature-sensitive material can be obtained by modifying the hydrophilic material. For example, the preparation method of the temperature-sensitive material includes the following steps. First, 200 grams of hydrophilic material, 400 grams of grafted material and 3500 milliliters of water are mixed to form a mixed solution. Subsequently, 500 milliliters of 1N nitric acid solution containing 10 grams of cerium (IV) initiator is added to the mixed solution and reacted at 55°C for 5 hours. After the reaction is completed and cooled, the precipitate is filtered and dried to obtain the temperature-sensitive material.

[0046] In some embodiments, the grafted material may include a structure represented by formula (4):

[0047] Wherein X may include a structure represented by formula (4-1) or formula (4-2):

[0048]

[0049] In some embodiments, the cerium (IV) initiator may include ceric ammonium nitrate, and may include a structure represented by formula (5):

[0050] In some embodiments, the CAS NO. of the cerium (IV) initiator may be 16774-21-3, and may be purchased from ACROS ORGANICS Ltd.

[0051] [Step S6: Providing polyester material]

[0052] In some embodiments, the polyester material may include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), or a combination thereof.

[0053] [Step S8: Forming intrinsic temperature-sensitive and humidity-regulating masterbatch]

[0054] The hydrophilic material, the thermosensitive material and the polyester material are uniformly mixed, and then subjected to a powder refining step, a powder dispersion step and a mixing and granulation step to form an intrinsic thermosensitive and humidifying masterbatch. In some embodiments, the weight ratio of the hydrophilic material to the thermosensitive material may be between 3:7 and 7:3, thereby providing the subsequently formed thermosensitive and humidifying fiber with good moisture conductivity and the ability to dynamically adjust temperature and humidity. In detail, if the above weight ratio is less than 3:7 (for example, 2:8), it is easy to cause the thermosensitive and humidifying fiber to have insufficient hydrophilicity, thereby affecting the moisture conductivity and water evaporation rate of the thermosensitive and humidifying fiber, and the excessively high proportion of the thermosensitive material is easy to cause the process to be too complicated (because the process steps of the thermosensitive material are more complicated than those of the hydrophilic material); and if the above weight ratio is greater than 7:3 (for example, 8:2), it is easy to cause the thermosensitive and humidifying fiber to have insufficient ability to adjust temperature and humidity, thereby affecting the thermosensitive and humidifying properties of the fabric obtained therefrom.

[0055] In some embodiments, the powder refining step may be to use a pulverizer to pulverize the powder at room temperature. In some embodiments, the powder dispersion step may be to disperse the powder for about 5 minutes at a rotation speed of about 500 rpm. In some embodiments, the particle size of the temperature-sensitive material after the powder refining step and the powder dispersion step may be between 1 μm and 500 μm, which is conducive to the mixing and granulation step. In some embodiments, the mixing temperature of the mixing and granulation step may be between 220°C and 270°C, and the screw speed may be between 150rpm and 250rpm. It is worth mentioning that since the results of thermogravimetric analysis (TGA) of the hydrophilic material and the temperature-sensitive material disclosed in the present invention show that they have thermal decomposition temperatures of about 362°C and about 375°C, respectively (analysis conditions: temperature range of 20°C to 600°C, and heating rate of 10°C / minute), they can stably exist in the above-mentioned mixing temperature environment without deterioration.

[0056] Please go back Figure 1After the intrinsic temperature-sensitive and humidity-controlling masterbatch of the present disclosure is formed through steps S2 to S8, step S10 may be performed to provide the intrinsic temperature-sensitive and humidity-controlling masterbatch. Subsequently, step S20 is performed to provide the substrate masterbatch. In some embodiments, the substrate masterbatch may include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), or a combination thereof.

[0057] Next, step S30 is performed to uniformly mix the intrinsic temperature-sensitive and humidity-controlling masterbatch and the substrate masterbatch to obtain the temperature-sensitive and humidity-controlling fiber. In some embodiments, the temperature-sensitive and humidity-controlling fiber can be obtained by performing a melt spinning step on the intrinsic temperature-sensitive and humidity-controlling masterbatch and the substrate masterbatch. In some embodiments, the spinning temperature can be between 285°C and 290°C, and the spinning speed can be between 2000 m / min and 3000 m / min. As mentioned above, since the hydrophilic material and the temperature-sensitive material disclosed in the present invention have a sufficiently high thermal decomposition temperature, they can stably exist in the above-mentioned spinning temperature environment without deterioration. After completing step S30, the temperature-sensitive and humidity-controlling fiber can be obtained. In some embodiments, based on the total weight of the temperature-sensitive and humidity-controlling fiber, the total weight of the hydrophilic material and the temperature-sensitive material can be between 0.8wt% and 1.2wt%, so as to provide the temperature-sensitive and humidity-controlling fiber with good moisture conductivity, temperature and humidity regulation, and fiber strength. Specifically, if the total weight is less than 0.8wt%, the moisture conductivity and temperature and humidity regulation of the temperature-sensitive and humidity-regulating fiber are likely to be insufficient; and if the total weight is greater than 1.2wt%, the fiber strength of the temperature-sensitive and humidity-regulating fiber is likely to be insufficient, which is not conducive to subsequent applications. In some embodiments, the fiber specifications of the temperature-sensitive and humidity-regulating fiber may be between 75d / 72f and 75d / 36f.

[0058] It should be understood that the connection relationship and function of the components described above will not be repeated. In the following description, multiple comparative examples and multiple embodiments will be listed to conduct various tests and evaluations to further verify the function of the present disclosure. Detailed descriptions of each comparative example and each embodiment are shown in Table 1. It should be understood that the polyester material used in each comparative example and each embodiment is PET, and the fiber specification of each comparative example and each embodiment is 75d / 72f.

[0059] Table 1

[0060]

[0061] <Experimental Example 1: Fiber Strength Test of Fibers>

[0062] In this experimental example, the fiber strength of the fibers of each comparative example and the temperature-sensitive and humidity-controlling fibers of each embodiment was tested using the ASTM D2256 standard method. The test results are shown in Table 2.

[0063] Table 2

[0064]

[0065] As shown in Table 2, the temperature-sensitive and humidity-controlling fibers of each embodiment can have a certain fiber strength greater than 2.5 g / d, which meets the standard. On the other hand, the fiber strength of Comparative Example 4 is obviously poor and does not meet the standard.

[0066] <Experimental Example 2: Fabric Drying Time Test>

[0067] In this experimental example, fabrics were made from the fibers of Comparative Examples 1, 2, and 4 and the temperature-sensitive and humidity-controlled fibers of each embodiment, and the drying time of each fabric was tested using the slightly adjusted AATCC-199 standard method. In this experimental example, the test conditions were: temperature 20°C, humidity 65%, heating plate temperature 35°C, and water volume 0.1 mL. The test results are shown in Table 3.

[0068] Table 3

[0069]

[0070] As shown in Table 3, compared with the fabrics made by Comparative Examples 1 and 2, the fabrics made by each embodiment can have a shorter drying time, showing a better drying effect. It is worth noting that although the fabric made by Comparative Example 4 is more outstanding in terms of drying time, it can be seen from the test results of the aforementioned Experimental Example 1 that the fiber of Comparative Example 4 has a lower and non-standard fiber strength, which is not conducive to subsequent applications such as woven fabrics.

[0071] <Experimental Example 3: Test on the difference in moisture evaporation rate of fabric at high and low temperatures>

[0072] In this experimental example, fabrics were made of the fibers of each comparative example and the temperature-sensitive and humidity-regulating fibers of each embodiment, and the moisture drying rate of each fabric was tested under different temperature and humidity environments, and the high / low temperature moisture evaporation rate difference of the fabric was calculated. In this experimental example, the moisture drying rate test method is: record the initial weight of the fabric, then drip water on the surface of the fabric, and record the weight of the fabric at fixed intervals to calculate the moisture evaporation rate. The test conditions are: fabric area 5×5cm 2 , water volume 0.2mL. The test results are shown in Table 4.

[0073] Table 4

[0074]

[0075] As shown in Table 4, compared with the fabrics made from Comparative Examples 1 to 3, the fabrics made from each embodiment can have a larger difference in high / low temperature moisture evaporation rate, indicating that it can be dried quickly at high temperature to achieve a cooling function, and can slow down the drying rate of moisture at low temperature to achieve a function of reducing heat loss. It is worth noting that although the fabric made from Comparative Example 4 is more prominent in the performance of the difference in high / low temperature moisture evaporation rate, and is very close to the difference in high / low temperature moisture evaporation rate of the fabrics made from each embodiment, it can be seen from the test results of the aforementioned Experimental Example 1 that the fiber of Comparative Example 4 has a lower fiber strength that does not meet the standard, which is not conducive to subsequent applications.

[0076] <Experimental Example 4: Moisture regain test of fabric>

[0077] In this experimental example, fabrics were made from the fiber of Comparative Example 3 and the temperature-sensitive and humidity-controlling fibers of each embodiment, and each fabric was placed in different environments to obtain fabric weights W1-W2, and then the moisture regain of each fabric was calculated based on the fabric weights W1-W2. In this experimental example, W1 is the fabric weight measured in an absolutely dry environment (105 degrees Celsius, RH 0%, for 2 hours), and W2 is the fabric weight measured in a high humidity environment (20 degrees Celsius, RH 65%, for 24 hours). The test results are shown in Table 5.

[0078] Table 5

[0079]

[0080] As shown in Table 5, compared with the fabric made in Comparative Example 3, the fabrics made in each embodiment have a greater moisture regain, indicating that the fabrics made in each embodiment are suitable for various products requiring moisture absorption and perspiration removal functions.

[0081] According to the above embodiments of the present disclosure, since the temperature-sensitive and humidity-regulating fiber of the present disclosure includes a hydrophilic material and a temperature-sensitive material, and the temperature-sensitive material has a suitable low critical solution temperature, the temperature-sensitive and humidity-regulating fiber can be dried quickly at high temperatures to achieve a cooling function, and can slow down the drying rate of water at low temperatures to achieve a function of reducing heat loss, thereby maintaining body temperature. Thus, clothing made of the temperature-sensitive and humidity-regulating fiber of the present disclosure can provide stable thermal comfort to the user, and can be well applied to various moisture absorption and perspiration-wicking products.

[0082] Although the present disclosure has been disclosed in the above embodiments, it is not intended to limit the present disclosure. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be determined by the scope of the attached patent application.

Claims

1. A temperature-sensitive and humidity-regulating fiber, characterized in that: include: A hydrophilic material comprising a structure represented by formula (I): wherein the molar ratio of x to y is between 9:1 and 1:3, and n is an integer between 7 and 120; and The temperature-sensitive material includes a structure represented by formula (1): Wherein in the formula (1), X includes a structure represented by formula (2) or formula (3): wherein the molar ratio of x to y is between 9:1 and 1:3, n is an integer between 7 and 120, and m is an integer between 10 and 1000, The weight ratio of the hydrophilic material to the thermosensitive material is between 3:7 and 7:3, the thermosensitive material has a lower critical solution temperature between 31.2°C and 32.5°C when the light transmittance is 3% to 80%, and the wavelength of the light is between 450nm and 550nm.

2. The temperature-sensitive and humidity-regulating fiber as described in claim 1, wherein when the hydrophilic material and the thermosensitive material are uniformly mixed in a weight ratio of 3:7 to form a temperature-sensitive and humidity-regulating material, the temperature-sensitive and humidity-regulating material has a low critical solution temperature between 31.2°C and 33.5°C when the light transmittance is 3% to 80%.

3. The temperature-sensitive and humidity-regulating fiber as described in claim 1, wherein when the hydrophilic material and the thermosensitive material are uniformly mixed in a weight ratio of 1:1 to form a temperature-sensitive and humidity-regulating material, the temperature-sensitive and humidity-regulating material has a lower critical solution temperature between 31.2°C and 34.5°C when the light transmittance is 3% to 80%.

4. The temperature-sensitive and humidity-regulating fiber as described in claim 1, wherein when the hydrophilic material and the thermosensitive material are uniformly mixed in a weight ratio of 7:3 to form a temperature-sensitive and humidity-regulating material, the temperature-sensitive and humidity-regulating material has a low critical solution temperature between 31.2°C and 36.0°C when the light transmittance is 3% to 80%. 5 . The temperature-sensitive and humidity-regulating fiber according to claim 1 , wherein the total weight of the hydrophilic material and the temperature-sensitive material is between 0.8 wt % and 1.2 wt % based on the total weight of the temperature-sensitive and humidity-regulating fiber.

6. A method for preparing a temperature-sensitive and humidity-regulating fiber, characterized in that: include: A temperature-sensitive material is provided, which includes a step of modifying a hydrophilic material to form the temperature-sensitive material, wherein: The hydrophilic material comprises a structure represented by formula (I): wherein the molar ratio of x to y is between 9:1 and 1:3, and n is an integer between 7 and 120, The temperature-sensitive material includes a structure represented by formula (1): Wherein in the formula (1), X includes a structure represented by formula (2) or formula (3): wherein the molar ratio of x to y is between 9:1 and 1:3, n is an integer between 7 and 120, and m is an integer between 10 and 1000; Provided is an intrinsic temperature-sensitive and humidity-controlling masterbatch, the intrinsic temperature-sensitive and humidity-controlling masterbatch comprising the hydrophilic material, the temperature-sensitive material and the polyester material, wherein the weight ratio of the hydrophilic material to the temperature-sensitive material is between 3:7 and 7:3, the temperature-sensitive material has a lower critical solution temperature between 31.2° C. and 32.5° C. when the light transmittance is 3% to 80%, and the wavelength of the light is between 450nm and 550nm; Providing a base material masterbatch, wherein the base material masterbatch includes the polyester material; as well as The intrinsic temperature-sensitive and humidity-controlling masterbatch and the base material masterbatch are uniformly mixed to obtain the temperature-sensitive and humidity-controlling fiber.

7. The method for preparing the temperature-sensitive and humidity-regulating fiber according to claim 6, further comprising: The hydrophilic material, the thermosensitive material and the polyester material are uniformly mixed, and subjected to a powder refining step, a powder dispersion step and a mixing and granulation step to form the intrinsic temperature-sensitive and humidity-regulating masterbatch, wherein the particle size of the thermosensitive material after the powder refining step and the powder dispersion step is between 1 μm and 500 μm.

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