Sunscreen skin care antibacterial self-heating thermal fabric containing capsaicin and preparation method thereof

Abstract

The present application relates to the technical field of self-heating fabric, in particular to a sunscreen skin-protecting antibacterial self-heating warm-keeping fabric containing capsaicin and a preparation method thereof. The present application applies capsaicin to the field of textile fabric for the first time, opens up a wider application of capsaicin, and improves its economic benefits. The silica-coated capsaicin powder is prepared by sol-gel technology, and then added into the spinning dope to prepare the original yarn with antibacterial, ultraviolet-proof and far-infrared heating properties. Then, the fabric with antibacterial, ultraviolet-proof and far-infrared heating functions is prepared through weaving and dyeing and finishing processes.

Description

Technical Field

[0001] This invention relates to the field of self-heating fabric technology, specifically to a sun-protective, skin-beautifying, antibacterial, self-heating, and warming fabric containing capsaicin and its preparation method. Background Technology

[0002] With the advancement of technology and people's increasing demands for quality of life, consumers are placing higher and higher demands on clothing. In addition to aesthetics, warmth, and comfort, the need for functional clothing is also growing.

[0003] There are generally two types of functional fabric preparation currently available on the market. One is to modify the yarn to give it the properties of the original yarn, making it washable and durable, while also having good skin compatibility and being less likely to cause allergic reactions. The other is to impregnate with auxiliaries or coat it with compounds. However, coatings are not only more polluting, but also less friendly to wear. After washing, their performance is easily reduced or they are easy to fall off, causing skin allergies, etc.

[0004] Capsaicin, derived from chili peppers, is a phenolic hydroxyl compound and one of the spiciest active components in chili peppers. It has excellent antibacterial and insecticidal properties, as well as anti-inflammatory, analgesic, and fat metabolism-promoting health benefits. Capsaicin contains both vitamin B and vitamin A, and is currently mostly used in food seasonings or biopharmaceuticals, without realizing its deeper value.

[0005] Therefore, based on this situation, this application discloses a sun-protective, skin-beautifying, antibacterial, self-heating, and warm fabric containing capsaicin and its preparation method, which applies capsaicin to the fields of fabrics and clothing, expands its uses, and has important research significance. Summary of the Invention

[0006] The purpose of this invention is to provide a sun-protective, skin-beautifying, antibacterial, self-heating, and warm fabric containing capsaicin and its preparation method, so as to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0008] A method for preparing a sun-protective, skin-beautifying, antibacterial, self-heating, and warm fabric containing capsaicin includes the following steps:

[0009] S1: Preparation of silica-coated capsaicin powder:

[0010] S11: Mix octyltriethoxysilane and 3-glycidyloxypropyltrimethoxysilane, add tetraethyl orthosilicate, stir for 30-50 min, then add ethanol to promote the condensation reaction of silane, continue stirring for 30-50 min, slowly add water dropwise, and hydrolyze at 25-30℃ for 20-28 h to form a transparent and uniform sol-gel solution.

[0011] In S11, the water is added at a rate of 0.5–1.5 mL / min; the molar ratio of octyltriethoxysilane, 3-glycidyloxypropyltrimethoxysilane, tetraethyl orthosilicate, ethanol, and water is (0.5–1.5):(0.5–1.5):

[0012] (0.03~0.09): (5~15): (4~10).

[0013] S12: Dissolve capsaicin in a solvent and stir at 50-70℃ for 10-18 hours until completely dissolved and mixed to obtain a capsaicin solution. Add the capsaicin solution to the sol-gel solution prepared in S11 and stir at 30-50℃ for 30-50 minutes to fully dissolve the capsaicin in the silica sol-gel solution. Place the solution in an evaporating dish and heat while stirring continuously to evaporate and remove moisture until the sol is completely dry, forming a dry gel. Grind the dry gel in a mortar and pestle and ball mill for 5-10 hours. After ball milling, transfer the powder to a muffle furnace and calcine at 250-300℃ for 3-5 hours. After the powder is completely dry, remove the powder and disperse it using high-power ultrasonic waves to fully disperse the soft agglomerates that formed during the drying process, obtaining silica-coated capsaicin powder with uniform particle size and a particle size of 30-70 nm.

[0014] In S12, the evaporation temperature is 50–100℃; the solvent is dimethylacetamide; and the amount of capsaicin used accounts for 1.1 wt%–3.7 wt% of the total mass of the sol-gel solution.

[0015] S2: Mix silica-coated capsaicin powder with deionized water, pre-disperse it to form a suspension, then mix the suspension with yarn raw material, add it to the reactor, heat it to the required reaction temperature, and polymerize it under a nitrogen atmosphere. During this process, pay attention to the viscosity, discharge, and pelletize to obtain raw yarn chips.

[0016] In S2, the yarn raw material is nylon yarn raw material or polyester yarn raw material. The nylon yarn raw material is molten caprolactam, and the polyester yarn raw material is terephthalic acid and ethylene glycol. The amount of silica-coated capsaicin powder added is 1wt% to 3wt% of the total mass of the system.

[0017] S3: The raw yarn slices are thoroughly dried, placed in a spinning machine for melt spinning, and the raw yarn is ejected through the spinning hole. The raw yarn is then pulled and stretched by a parallel drafting machine, twisted and shaped to obtain the raw yarn. The specifications of the prepared raw yarn are 40D-80D.

[0018] In S3, the spinning temperature is 250–310℃, the spinning speed is 2700–3100 m / min, the air pressure is 18–22 Pa, the air temperature is 17–20℃, and the pre-network pressure is 0.04–0.07 MPa. During spinning, the filaments are ejected through shaped spinnerets, and the cross-sectional shape of the spinnerets can be any one of cross, pentagon, or tepal.

[0019] During traction stretching, the processing speed is 640–680 m / min and the temperature is 160–180℃; the setting temperature is 140–160℃ and the ratio of untwisting tension to twisting tension is 0.6–0.8.

[0020] S4: Take raw yarn and spandex, weave them into a greige fabric; dye the greige fabric, dehydrate it, dip and rub it twice, dry and set it to obtain a heat-generating fabric.

[0021] During weaving, in the first row, needle a is a float stitch, needle b forms a loop, and needle c is a float stitch, while needle d forms a loop. In the second row, needle a forms a loop, needle b is a float stitch, and needle c forms a loop, while needle d is a float stitch. The loops knitted by the lower needle cylinder form the right side of the fabric, while the loops knitted by the upper needle cylinder form the wrong side. The wrong side loops are larger than the right side loops, with a larger inner gap.

[0022] The small gaps on the outside help to quickly transfer moisture and sweat from the inside to the outside, keeping the skin dry quickly without affecting the fabric's sun protection performance.

[0023] In S4, the finishing agent is hygroscopic and quick-drying finishing agent STA, with a concentration of 35-55 g / L, a drying temperature of 80-110℃, a setting temperature of 180-190℃, and a setting time of 1-2 min.

[0024] In S4, a napping process is performed before dyeing the greige fabric; before drying and setting, the greige fabric is immersed in a hydrophilic napping agent, napped, and then dried and set. The concentration of the hydrophilic napping agent is 10-20 g / L.

[0025] A sun-protective, skin-beautifying, antibacterial, self-heating, and warm fabric containing capsaicin, prepared according to any of the above preparation methods.

[0026] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0027] (1) This invention is the first to apply capsaicin to the field of textile fabrics, opening up a wider range of applications for capsaicin and improving its economic benefits; by preparing silica-coated capsaicin powder through sol-gel technology, and then adding it to the spinning solution to prepare a yarn with antibacterial, UV protection and far-infrared heating properties, and then preparing a fabric with antibacterial, UV protection and far-infrared heating functions through weaving and dyeing processes.

[0028] (2) The fabric produced by this invention has excellent functionality. In terms of warmth, it can generate far-infrared heat and also protect against ultraviolet rays. The far-infrared radiation temperature rise value is greater than 2, which far exceeds the national standard of 1.4℃. It has strong ultraviolet protection performance, with an ultraviolet protection factor UPF value of 1000+ and UVA less than 1%, which far exceeds the national standard of 50+ and 5%. Moreover, its functions are inherent properties of the yarn itself. It is durable and washable. The capsaicin is coated on the inside and will not come into direct contact with the skin. It will not produce odor or irritation and is skin-friendly.

[0029] (3) The fabric produced by the invention has good elasticity, good wear resistance, and an elongation of more than 200%. It is suitable for both sportswear and everyday wear. The fabric yarn is a non-circular cross-section yarn. The fabric has excellent moisture absorption and quick-drying function. In terms of structure, the inner gap is large and the outer gap is small, which helps the moisture and sweat on the inner side to be quickly transferred to the outer side, keeping the skin dry quickly, without affecting the sun protection performance of the fabric. When wearing it for sports in winter, it can keep the skin dry quickly after sweating. Detailed Implementation

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below. 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the following examples, the hydrophilic hair-raising agent is model SX130-1.

[0032] Example 1:

[0033] A method for preparing a sun-protective, skin-beautifying, antibacterial, self-heating, and warm fabric containing capsaicin includes the following steps:

[0034] S1: Preparation of silica-coated capsaicin powder:

[0035] S11: Mix octyltriethoxysilane and 3-glycidyloxypropyltrimethoxysilane, add tetraethyl orthosilicate, stir for 30 min, then add ethanol to promote the condensation reaction of silane, continue stirring for 30 min, slowly add water, and hydrolyze at 25°C for 20 h to form a transparent and uniform sol-gel solution.

[0036] In S11, the water is added at a rate of 0.5 mL / min; the molar ratio of octyltriethoxysilane, 3-glycidyloxypropyltrimethoxysilane, tetraethyl orthosilicate, ethanol, and water is 0.5:0.5:0.03:5:4.

[0037] S12: Dissolve capsaicin in a solvent and stir at 50°C for 10 hours until completely dissolved and mixed to obtain a capsaicin solution. Add the capsaicin solution to the sol-gel solution prepared in S11 and stir at 30°C for 30 minutes to fully dissolve the capsaicin in the silica sol-gel solution. Place the solution in an evaporating dish and heat while stirring continuously to evaporate and remove moisture until the sol is completely dry, forming a dry gel. Grind the dry gel in a mortar and pestle and ball mill for 5 hours. After ball milling, transfer the powder to a muffle furnace and calcine at 250°C for 3 hours. After the powder is completely dry, remove the powder and disperse it using high-power ultrasonic waves to open up the soft agglomerates that were generated during the drying process, thus obtaining silica-coated capsaicin powder with uniform particle size and a particle size of 30 nm.

[0038] In S12, the evaporation temperature is 50℃; the solvent is dimethylacetamide; and the amount of capsaicin used accounts for 1.1 wt% of the total mass of the sol-gel solution.

[0039] S2: Mix silica-coated capsaicin powder with deionized water, pre-disperse to form a suspension, then mix the suspension with molten caprolactam (nylon yarn raw material), add to a reactor, heat to the required reaction temperature, and polymerize under a nitrogen atmosphere. During this process, pay attention to the viscosity, discharge, and pelletize to obtain raw yarn chips.

[0040] In S2, the amount of silica-coated capsaicin powder added is 1 wt% of the total mass of the system.

[0041] S3: The raw yarn slices are thoroughly dried, placed in a spinning machine for melt spinning, and the raw yarn is ejected through the spinning hole. The raw yarn is then pulled and stretched by a parallel drafting machine, twisted and shaped to obtain the raw yarn; the prepared raw yarn specification is 40D.

[0042] In S3, the spinning temperature is 250℃, the spinning speed is 2700m / min, the air pressure is 18Pa, the air temperature is 17℃, and the pre-network pressure is 0.04MPa. During spinning, the filaments are ejected through shaped spinnerets, and the cross-sectional shape of the spinnerets can be any one of cross, pentagon, or quatrefoil.

[0043] During traction stretching, the processing speed is 640 m / min and the temperature is 160℃; the setting temperature is 140℃ and the ratio of untwisting tension to twisting tension is 0.6.

[0044] S4: Take raw yarn and 30D spandex, weave to form a greige fabric; after brushing, dye the greige fabric, dehydrate, perform two dips and two nips finishing, and then dry and set to obtain the heat-generating fabric. The fabric width is 145cm and the weight is 210g / ㎡.

[0045] In S4, the finishing agent is hygroscopic and quick-drying finishing agent STA with a concentration of 35 g / L, the drying temperature is 80℃, the setting temperature is 180℃, and the setting time is 1 min.

[0046] Example 2:

[0047] A method for preparing a sun-protective, skin-beautifying, antibacterial, self-heating, and warm fabric containing capsaicin includes the following steps:

[0048] S1: Preparation of silica-coated capsaicin powder:

[0049] S11: Mix octyltriethoxysilane and 3-glycidyloxypropyltrimethoxysilane, add tetraethyl orthosilicate, stir for 40 min, then add ethanol to promote the condensation reaction of silane, continue stirring for 40 min, slowly add water, and hydrolyze at 25°C for 24 h to form a transparent and uniform sol-gel solution.

[0050] In S11, the water is added at a rate of 1 mL / min; the molar ratio of octyltriethoxysilane, 3-glycidyloxypropyltrimethoxysilane, tetraethyl orthosilicate, ethanol, and water is 1:1:0.06:10:7.

[0051] S12: Dissolve capsaicin in a solvent and stir at 60℃ for 14 hours until completely dissolved and mixed to obtain a capsaicin solution; add the capsaicin solution to the sol-gel solution prepared in S11 and stir at 40℃ for 40 minutes to fully dissolve capsaicin in the silica sol-gel solution; place in an evaporating dish and heat while stirring continuously to evaporate and remove water until the sol is dry, forming a dry gel; grind the dry gel in a mortar and pestle and ball mill for 8 hours; after ball milling, transfer the powder to a muffle furnace and calcine at 270℃ for 4 hours; after the powder is completely dry, take out the powder and disperse it with high-power ultrasonic waves to open the soft agglomerated particles generated during the drying process, and obtain silica-coated capsaicin powder with uniform particle size and a particle size of 50nm.

[0052] In S12, the evaporation temperature is 75℃; the solvent is dimethylacetamide; and the amount of capsaicin used accounts for 2.4 wt% of the total mass of the sol-gel solution.

[0053] S2: Mix silica-coated capsaicin powder with deionized water, pre-disperse to form a suspension, then mix the suspension with molten terephthalic acid and ethylene glycol (polyester yarn raw material), add to a reactor, heat to the required reaction temperature, and polymerize under a nitrogen atmosphere. During this process, pay attention to the viscosity, discharge, and pelletize to obtain raw yarn chips.

[0054] In S2, the amount of silica-coated capsaicin powder added is 2 wt% of the total mass of the system.

[0055] S3: The raw yarn slices are thoroughly dried, placed in a spinning machine for melt spinning, and the raw yarn is ejected through the spinning hole. The raw yarn is then drawn and stretched by a parallel drafting machine, twisted and shaped to obtain the raw yarn; the prepared raw yarn specification is 50D.

[0056] In S3, the spinning temperature is 290℃, the spinning speed is 2900m / min, the air pressure is 20Pa, the air temperature is 18℃, and the pre-network pressure is 0.06MPa. During spinning, the filaments are ejected through irregularly shaped spinnerets, and the cross-sectional shape of the spinnerets can be any one of cross, pentagon, or lobed.

[0057] During traction stretching, the processing speed is 660 m / min and the temperature is 170℃; the setting temperature is 150℃ and the ratio of untwisting tension to twisting tension is 0.7.

[0058] S4: Take the raw yarn and 55D spandex, weave them into a greige fabric; dye the greige fabric, dehydrate it, perform two dips and two nips, and then dry and set it to obtain the heat-generating fabric. The fabric has a width of 150cm and a weight of 240g / ㎡.

[0059] In S4, the finishing agent is a moisture-absorbing and quick-drying finishing agent STA with a concentration of 40 g / L. The drying temperature is 100℃, the setting temperature is 180℃, and the setting time is 1 min. Before drying and setting, the blank is immersed in a hydrophilic roughening agent and rolled to roughen it before drying and setting. The concentration of the hydrophilic roughening agent is 10 g / L.

[0060] Example 3:

[0061] A method for preparing a sun-protective, skin-beautifying, antibacterial, self-heating, and warm fabric containing capsaicin includes the following steps:

[0062] S1: Preparation of silica-coated capsaicin powder:

[0063] S11: Mix octyltriethoxysilane and 3-glycidyloxypropyltrimethoxysilane, add tetraethyl orthosilicate, stir for 50 min, then add ethanol to promote the condensation reaction of silane, continue stirring for 50 min, slowly add water, and hydrolyze at 25°C for 20-28 h to form a transparent and uniform sol-gel solution.

[0064] In S11, the water is added at a rate of 1.5 mL / min; the molar ratio of octyltriethoxysilane, 3-glycidyloxypropyltrimethoxysilane, tetraethyl orthosilicate, ethanol, and water is 1.5:1.5:0.09:10:10.

[0065] S12: Dissolve capsaicin in a solvent and stir at 70℃ for 18 hours until completely dissolved and mixed to obtain a capsaicin solution; add the capsaicin solution to the sol-gel solution prepared in S11 and stir at 50℃ for 50 minutes to fully dissolve capsaicin in the silica sol-gel solution; place in an evaporating dish and heat while stirring continuously to evaporate and remove water until the sol is dry, forming a dry gel; grind the dry gel in a mortar and pestle and ball mill for 10 hours; after ball milling, transfer the powder to a muffle furnace and calcine at 300℃ for 5 hours; after the powder is completely dry, remove the powder and disperse it with high-power ultrasonic waves to open the soft agglomerated particles generated during the drying process, obtaining silica-coated capsaicin powder with uniform particle size and a particle size of 70nm.

[0066] In S12, the evaporation temperature is 100℃; the solvent is dimethylacetamide; and the amount of capsaicin used accounts for 3.7 wt% of the total mass of the sol-gel solution.

[0067] S2: Mix silica-coated capsaicin powder with deionized water, pre-disperse to form a suspension, then mix the suspension with molten terephthalic acid and ethylene glycol (polyester yarn raw material), add to a reactor, heat to the required reaction temperature, and polymerize under a nitrogen atmosphere. During this process, pay attention to the viscosity, discharge, and pelletize to obtain raw yarn chips.

[0068] In S2, the amount of silica-coated capsaicin powder added is 3 wt% of the total mass of the system.

[0069] S3: The raw yarn slices are thoroughly dried, placed in a spinning machine for melt spinning, and the raw yarn is ejected through the spinning hole. The raw yarn is then drawn and stretched by a parallel drafting machine, twisted and shaped to obtain the raw yarn. The raw yarn prepared has a specification of 75D.

[0070] In S3, the spinning temperature is 310℃, the spinning speed is 3100m / min, the air pressure is 22Pa, the air temperature is 20℃, and the pre-network pressure is 0.07MPa. During spinning, the filaments are ejected through shaped spinnerets, and the cross-sectional shape of the spinnerets can be any one of cross, pentagon, or quatrefoil.

[0071] During traction stretching, the processing speed is 680 m / min and the temperature is 180℃; the setting temperature is 160℃ and the ratio of untwisting tension to twisting tension is 0.8.

[0072] S4: Take the raw yarn and 40D spandex, weave them into a greige fabric; dye the greige fabric, dehydrate it, perform two dips and two nips, and then dry and set it to obtain the heat-generating fabric. The fabric has a width of 155cm and a weight of 310g / ㎡.

[0073] In S4, the finishing agent is a moisture-absorbing and quick-drying finishing agent STA with a concentration of 55 g / L. The drying temperature is 110℃, the setting temperature is 190℃, and the setting time is 2 min. Before drying and setting, the blank is immersed in a hydrophilic roughening agent and rolled to roughen it before drying and setting. The concentration of the hydrophilic roughening agent is 20 g / L.

[0074] Comparative Example 1:

[0075] Polyester-spandex fleece fabric, weight 240g / ㎡, single-sided construction, fabric sourced from the market (Guangzhou Xinqiang Textile Technology Co., Ltd., fabric number: D1899-1).

[0076] Comparative Example 2:

[0077] Example 2 was used as the experimental group, and Comparative Example 2 was set as the control experiment. In Comparative Example 2, no silica-coated capsaicin powder was prepared; capsaicin was only added to the spinning raw material.

[0078] Comparative Example 3:

[0079] Example 2 was used as the experimental group, and Comparative Example 3 was set as the control experiment. In Comparative Example 3, no silica-coated capsaicin powder was added to the spinning raw material.

[0080] Testing experiment:

[0081] Fabrics prepared in Examples 1-3 and Comparative Examples 1-3 were used to test their performance. The testing standards for sun protection performance were GB / T18830-2009 "Evaluation of UV Protection Performance of Textiles"; the testing standards for moisture absorption and quick-drying performance were GB / T21655.2-2019 "Evaluation of Moisture Absorption and Quick-Drying Performance Part 2: Dynamic Moisture Transfer Method"; the testing standards for far-infrared performance were GB / T30127-2013 "Detection and Evaluation of Far-Infrared Performance of Textiles"; the testing standards for moisture permeability were GB / T12704.2-2009 "Test Method for Moisture Permeability of Textile Fabrics Part 2: Evaporation Method"; and the testing standards for antibacterial performance were GB / T20944.3-2008 "Evaluation of Antibacterial Performance of Textiles Part 3: Oscillation Method". The test results are shown in Tables 1 and 2 below.

[0082] Table 1

[0083]

[0084]

[0085] Table 2

[0086]

[0087] Conclusion: As shown in Tables 1 and 2 above, compared with the fabric of the comparative example, the heat-generating fabrics provided by Examples 1-3 of the present invention have excellent sun protection performance, moisture absorption and quick-drying performance, far-infrared heat generation performance, antibacterial properties, and elasticity. In particular, the sun protection performance, moisture absorption and quick-drying performance, and far-infrared performance are significantly better than those of the fabric in Comparative Example 1, which does not have far-infrared performance and moisture absorption and quick-drying properties.

[0088] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for preparing a sun-protective, skin-beautifying, antibacterial, self-heating, and warm fabric containing capsaicin, characterized in that: Includes the following steps: S1: Preparation of silica-coated capsaicin powder; S11: Mix octyltriethoxysilane and 3-glycidyloxypropyltrimethoxysilane, add tetraethyl orthosilicate, stir for 30-50 min, then add ethanol, continue stirring for 30-50 min, slowly add water dropwise, and hydrolyze at 25-30℃ for 20-28 h to form a sol-gel solution. S12: Dissolve capsaicin in a solvent and stir at 50-70℃ for 10-18h to obtain a capsaicin solution; add the capsaicin solution to the sol-gel solution prepared in S11, stir at 30-50℃ for 30-50min, evaporate the water to dry the sol, form a dry gel, pulverize and ball mill, then transfer to a muffle furnace and calcine at 250-300℃ for 3-5h; after calcination, take the powder, ultrasonically disperse it to obtain silica-coated capsaicin powder; S2: Pre-disperse silica-coated capsaicin powder to form a suspension, then mix the suspension with yarn raw material, heat to the reaction temperature, polymerize under nitrogen atmosphere, discharge, granulate, and obtain raw yarn chips; S3: Dry the raw yarn slices thoroughly, melt spin them, draw and stretch them, twist and set them to obtain the raw yarn; S4: Take raw yarn and spandex, weave them into a greige fabric; dye the greige fabric, dehydrate it, finish it, dry and set it to obtain the heat-generating fabric; In S2, the yarn raw material is nylon yarn or polyester yarn; the amount of silica-coated capsaicin powder added is 1wt% to 3wt% of the total mass of the system.

2. The method for preparing the sun-protective, skin-beautifying, antibacterial, self-heating, and warm fabric containing capsaicin according to claim 1, characterized in that: In S11, the water is added at a rate of 0.5–1.5 mL / min; the molar ratio of octyltriethoxysilane, 3-glycidyloxypropyltrimethoxysilane, tetraethyl orthosilicate, ethanol, and water is (0.5–1.5):(0.5–1.5):(0.03–0.09):(5–15):(4–10).

3. The method for preparing the sun-protective, skin-beautifying, antibacterial, self-heating, and warm fabric containing capsaicin according to claim 1, characterized in that: In S12, the evaporation temperature is 50–100℃; the solvent is dimethylacetamide; and the amount of capsaicin used accounts for 1.1 wt%–3.7 wt% of the total mass of the sol-gel solution.

4. The method for preparing the sun-protective, skin-beautifying, antibacterial, self-heating, and warm fabric containing capsaicin according to claim 1, characterized in that: In S3, the spinning temperature is 250–310℃, the spinning speed is 2700–3100 m / min, the air pressure is 18–22 Pa, the air temperature is 17–20℃, and the pre-network pressure is 0.04–0.07 MPa. During spinning, the filaments are ejected through shaped spinnerets, and the cross-sectional shape of the spinnerets can be any one of cross, pentagon, or tepal.

5. The method for preparing the sun-protective, skin-beautifying, antibacterial, self-heating, and warm fabric containing capsaicin according to claim 1, characterized in that: In S3, during traction stretching, the processing speed is 640–680 m / min, and the temperature is 160–180℃; the setting temperature is 140–160℃, and the ratio of untwisting tension to twisting tension is 0.6–0.

8.

6. The method for preparing the sun-protective, skin-beautifying, antibacterial, self-heating, and warm fabric containing capsaicin according to claim 1, characterized in that: In S4, the concentration of the finishing agent is 35-55 g / L, the drying temperature is 80-110℃, the setting temperature is 180-190℃, and the setting time is 1-2 min.

7. The method for preparing the sun-protective, skin-beautifying, antibacterial, self-heating, and warm fabric containing capsaicin according to claim 1, characterized in that: In S4, a napping process is performed before dyeing the greige fabric; before drying and setting, the greige fabric is immersed in a hydrophilic napping agent, napped, and then dried and set. The concentration of the hydrophilic napping agent is 10-20 g / L.

8. The self-heating thermal fabric prepared by the preparation method according to any one of claims 1 to 7.

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