A far-infrared heat storage, warm-keeping and antibacterial sports fabric and its preparation method

Abstract

The present invention discloses a far-infrared heat storage, warm-keeping and antibacterial sports fabric and a preparation method thereof. The far-infrared heat storage, warm-keeping and antibacterial sports fabric comprises a surface layer and a lining layer; the surface layer yarn is bamboo charcoal fiber; the lining layer yarn is spandex core-spun yarn. The present invention also provides a preparation method thereof. Compared with the prior art, the fabric prepared in this application is woven from bamboo charcoal fiber and spandex core-spun yarn. Among them, the interaction between bamboo charcoal powder and volcanic mud has dual antibacterial and far-infrared emission properties, effectively promoting blood circulation and metabolism; at the same time, the prepared bamboo charcoal fiber has a special-shaped porous structure, which can reduce the discomfort caused by sweat contacting the skin and has excellent moisture absorption and quick-drying properties; a variety of functional fibers are scientifically proportioned and combined, and the inner layer has a delicate touch, is soft and skin-friendly.

Description

Technical Field

[0001] The present invention relates to the technical field of textiles, and particularly relates to a far-infrared heat storage, warm-keeping and antibacterial sports fabric and a preparation method thereof. Background Art

[0002] With the rapid development of society, people have higher and higher requirements for the comfort and functionality of clothing. Cotton fabrics have good comfort, but when the sweating amount of the human body is large, the hydrophilic groups on the cotton fabric have the property of absorbing sweat when sweating, and the cotton fiber has a strong water-retaining property. Once the sweat reaches saturation, the drying speed is slow, and the clothes will be in contact with the skin for a long time, giving people an uncomfortable, wet and cold feeling. After absorbing sweat, it will increase the weight of the cotton fabric, and at the same time, there will be a sticky and uncomfortable feeling when in contact with the skin, and it is easy to breed bacteria, germs and other microorganisms, which not only brings harm to physical health, but also causes discomfort after sweating.

[0003] Polyester fiber is widely used in clothing fabrics, home textiles and other fields due to its excellent physical and chemical properties such as good drapability and high strength. However, due to the regular macromolecular chain of polyester, it does not contain hydrophilic groups, the fiber surface is smooth, and its fabric has poor moisture permeability, that is, the ability to transmit high-temperature sweat gas excreted through the skin, and it is easy to accumulate static electricity on the fiber, resulting in poor moisture absorption and air permeability. Its hydrophobic property limits its application in the field of clothing with higher requirements for water absorption or moisture absorption.

[0004] Polyester fiber is a typical hydrophobic fiber with a low moisture regain. Generally, the surface of polyester fiber is smooth and has no pore structure, and its wearing comfort is poor when used as a clothing material. It is easy to produce a stuffy feeling when worn in a hot and humid state, which affects the mood. Polyester is a kind of polyester fiber. Polyester usually refers to a high-molecular compound formed by the polycondensation of dihydric alcohol and dibasic acid. The polymer is spun into polyester fiber. The basic chain links are connected by ester bonds. It is the trade name of polyester fiber in China and is the most widely used synthetic fiber. Bamboo charcoal powder is a bio-environmental protection material obtained by high-temperature calcination and carbonization of natural bamboo at high temperature. Its molecular structure is hexagonal, with a hard texture, fine pores, a large specific surface area and strong adsorption, and has excellent physical and chemical properties. Among them, bamboo charcoal has excellent negative ion emission, far-infrared emission and antibacterial properties. Therefore, the present application applies bamboo charcoal powder to the modification of polyester fiber.

[0005] CN112064351A discloses a warm and antibacterial composite fabric and its processing technology, which solves the problems of heavy weight, poor sweat absorption and moisture permeability, and poor antibacterial property in the existing antibacterial and warm fabrics. The warm and antibacterial composite fabric uses modified synthetic fibers as warp yarns and modified natural fibers as weft yarns. After one warp yarn is interwoven with the surface and inner two weft yarns to form a primary fabric, the primary fabric is infiltrated with an impregnating solution and then dried to obtain the warm and antibacterial composite fabric. In the present invention, modified synthetic fibers are used as warp yarns and modified natural fibers are used as weft yarns. After one warp yarn is interwoven with the surface and inner two weft yarns to form a primary fabric, the primary fabric is infiltrated with an impregnating solution and then dried to obtain the warm and antibacterial composite fabric. The warm and antibacterial composite fabric prepared by the present invention is not easy to deform, shrink, generate static electricity, and has a soft and smooth touch. It has super heat storage and warmth retention, sweat absorption and moisture permeability, and antibacterial properties, and can be widely used in making warm underwear, shirts and other clothing; however, the mechanical properties, antibacterial properties, antibacterial durability, and moisture absorption and quick-drying properties of the fibers need to be further improved. Summary of the Invention

[0006] To achieve the above object, the present invention provides a far-infrared heat storage, warm and antibacterial sports fabric, which is characterized in that: it includes a surface layer and an inner layer; the surface layer yarn is bamboo charcoal fiber; the inner layer yarn is spandex core-spun yarn.

[0007] Among them, in the far-infrared heat storage, warm and antibacterial sports fabric, the weight percentage of bamboo charcoal fiber is 50-60wt%, and the balance is spandex core-spun yarn.

[0008] The preparation method of the bamboo charcoal fiber includes the following steps:

[0009] (1) Melting and blending: Mix bamboo charcoal powder and polyester chips to obtain a premix, and melt and blend the above premix and then slice to obtain bamboo charcoal polyester chips; the content of bamboo charcoal powder is 10-20wt% of the polyester chips;

[0010] (2) Melting spinning: Meter the bamboo charcoal polyester chips, extrude them through a spinneret, cool, oil, stretch, heat-set, and wind them to obtain bamboo charcoal fiber FDY yarn;

[0011] Among them, the melting and blending in step (1) is carried out in a twin-screw extruder, and the temperature of the melting and blending is 280-300°C.

[0012] Among them, the process parameters of the melting spinning in step (2) are:

[0013] Extrusion temperature: 280-300°C;

[0014] Cooling temperature: 20-26°C;

[0015] Network pressure: 0.2-0.4MPa;

[0016] Speed of the first roller: 2000 - 2500 m / min;

[0017] Temperature of the first roller: 70 - 85 °C;

[0018] Speed of the second roller: 3000 - 3500 m / min;

[0019] Temperature of the second roller: 110 - 130 °C;

[0020] Winding speed is 4000 - 6000 r / min;

[0021] Among them, the spinneret plate described in step (2) is provided with cross-shaped spinneret holes and / or king-shaped spinneret holes.

[0022] Among them, the oil agent used in the oiling process in step (2) is Lurol PS-11748, and the use concentration is 0.1 - 1 wt%.

[0023] (3) DTY process: The above-mentioned bamboo charcoal fiber FDY yarn is made into bamboo charcoal fiber through a wire guide tube, texturing, heating and stretching, twisting, heat setting, and winding and forming, that is, the obtained is bamboo charcoal DTY fiber.

[0024] Among them, the DTY process in step (3) is as follows:

[0025] Spinning speed: 500 - 700 m / min;

[0026] Temperature of the first hot box: 160 - 190 °C;

[0027] Temperature of the second hot box: 160 - 190 °C;

[0028] Compressed air: 0.08 - 0.13 MPa;

[0029] Draft ratio: 1.00 - 1.10.

[0030] Due to the small particle size of bamboo charcoal powder, large surface energy, easy agglomeration, and poor compatibility with polyester chips, on this basis, silane coupling agent is used to treat bamboo charcoal powder to increase its dispersion performance and reduce the agglomeration effect. At the same time, a copolymer is prepared with quaternary ammonium salt of chitosan containing double bonds, maleic anhydride, N,N-methylenebisacrylamide, and acrylic acid as the main raw materials; then it reacts with amino-containing bamboo charcoal powder under the action of 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride and N-hydroxysuccinimide to form a dense three-dimensional network structure, effectively improving the dispersion performance of bamboo charcoal powder and at the same time improving its compatibility with polyester. Therefore, this application introduces modified bamboo charcoal powder into polyester chips to prepare bamboo charcoal fiber. Bamboo charcoal powder and quaternary ammonium salt of chitosan act synergistically to effectively improve its antibacterial performance, and at the same time the introduction of modified bamboo charcoal powder can improve its mechanical properties.

[0031] Further preferably, the preparation method of the bamboo charcoal fiber comprises the following steps:

[0032] (1) Melting and blending: Mix the modified bamboo charcoal powder and polyester chips to obtain a premix, and then melt and blend the above premix and slice it to obtain bamboo charcoal polyester chips; wherein the content of bamboo charcoal powder is 10-20 wt% of the polyester chips.

[0033] (2) Melt spinning: Extrude the bamboo charcoal polyester chips through metering, a spinneret, cooling, oiling, stretching, heat setting, and winding to obtain bamboo charcoal fiber FDY yarn.

[0034] (3) DTY process: Pass the above bamboo charcoal fiber FDY yarn through a guide tube, network, heating and stretching, twisting, heat setting, and winding and forming to obtain bamboo charcoal fiber, that is, the obtained is bamboo charcoal DTY fiber.

[0035] The preparation method of the modified bamboo charcoal powder comprises the following steps:

[0036] S1 Treat the bamboo charcoal powder with an electromagnetic field of 6000-15000 Hz for 30-50 min to obtain pretreated bamboo charcoal powder.

[0037] S2 Add the pretreated bamboo charcoal powder and amino silane coupling agent to a 20-50 wt% ethanol aqueous solution, mix evenly, heat to 85-100 °C and react for 5-10 h. After the reaction, centrifuge to obtain the precipitate, wash, and dry to obtain amino-containing bamboo charcoal powder; wherein the mass ratio of the pretreated bamboo charcoal powder, amino silane coupling agent, and 20-50 wt% ethanol aqueous solution is 1:(0.3-1):30-60.

[0038] S3 Mix 1-5 parts by weight of chitosan quaternary ammonium salt containing double bonds, 1-3 parts by weight of maleic anhydride, 1-2 parts by weight of N,N-methylenebisacrylamide, and 1-2 parts by weight of acrylic acid in 60-100 parts by weight of water, mix evenly, heat to 80-95 °C and react for 30-60 min, then add 5-10 parts by weight of a 1-5 wt% ammonium persulfate aqueous solution and 0.1-1 part by weight of mercaptoacetic acid, continue to react for 3-5 h, cool to room temperature, adjust the pH to neutral, and filter to obtain a copolymer solution.

[0039] S4 Add 0.25-0.5 parts by weight of 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride and 0.25-0.5 parts by weight of N-hydroxysuccinimide to 0.3-0.8 parts by weight of the copolymer solution, mix evenly and stir at room temperature for 30 min, then add 0.5-1 part by weight of amino-containing bamboo charcoal powder, adjust the pH to 6-6.5, continue to react for 8-12 h. After the reaction, centrifuge to obtain the precipitate, wash, and freeze-dry to obtain the modified bamboo charcoal powder.

[0040] Among them, the particle size of the bamboo charcoal powder described in step S1 is 10 - 100 nm.

[0041] The spandex core-spun yarn includes a core yarn and a covering yarn. The covering yarn is wrapped around the surface of the core yarn. The core yarn is spandex filament, and the covering yarn is volcanic mud nylon filament. Among them, the mass percentage of the core yarn in the core-spun yarn is 15 - 20%.

[0042] The preparation method of the spandex core-spun yarn includes the following steps: feeding spandex filament into a roller, performing a pre-drafting of 1.0 - 3.0 times, and feeding it into the front roller nip through a godet wheel; the volcanic mud nylon filament passes through the back roller and the middle roller and converges with the spandex filament at the front roller, and forms a spandex core-spun yarn under the twisting action of a ring spinning frame.

[0043] Among them, the ring spinning frame adopted in the present invention is a ring spinning frame.

[0044] Among them, the spindle speed of the ring spinning frame is 5000 - 8000 rpm, and the twist factor of the ring spinning frame is 300 - 500.

[0045] In this application, the spandex core-spun yarn uses spandex filament as the core yarn and volcanic mud nylon filament as the covering yarn. The volcanic mud nylon filament has properties such as antibacterial and deodorant, emitting negative ions, emitting far-infrared rays, and warming. Therefore, the fabric prepared in this application has good far-infrared, heat storage and warming, antibacterial and other properties.

[0046] The present invention also discloses a preparation method of a far-infrared heat storage and warming antibacterial sports fabric.

[0047] A preparation method of a far-infrared heat storage and warming antibacterial sports fabric includes the following steps:

[0048] Knitting a plain stitch on a fully computer-controlled single cylinder jacquard knitting circular machine. The fabric surface layer and the inner layer are both fed with yarn at the same time. The surface layer selects bamboo charcoal fiber, and the inner layer selects spandex core-spun yarn.

[0049] Preferably, a fully computer-controlled single cylinder jacquard knitting circular machine is adopted, and knitting is carried out with 8 yarns as a cycle. The first, third, fifth, and seventh paths use surface layer yarns, and the second, fourth, sixth, and eighth paths use inner layer yarns.

[0050] It can also be that a fully computer-controlled single cylinder jacquard knitting circular machine is adopted, and knitting is carried out with 8 yarns as a cycle. The first, third, fifth, and seventh paths use inner layer yarns, and the second, fourth, sixth, and eighth paths use surface layer yarns.

[0051] The beneficial effects of the present invention:

[0052] Compared with the prior art, the fabric prepared in this application is woven from bamboo charcoal fiber and spandex core-spun yarn. Among them, the interaction between bamboo charcoal powder and volcanic mud has dual antibacterial and far-infrared emission properties, effectively promoting blood circulation and metabolism. At the same time, the prepared bamboo charcoal fiber has a special-shaped porous structure, which can reduce the discomfort caused by sweat contacting the skin and has excellent moisture absorption and quick-drying properties. The scientific ratio combination of various functional fibers makes the inner layer feel delicate, soft and skin-friendly. Detailed implementation mode

[0053] In the ranges disclosed in the present invention, the endpoints and any values are not limited to the exact ranges or values. These ranges or values should be understood to include values close to these ranges or values. For numerical ranges, between the endpoint values of each range, between the endpoint values of each range and individual point values, and between individual point values, they can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed in the present invention.

[0054] Introduction to the raw materials used in the embodiments of the present invention:

[0055] The chitosan quaternary ammonium salt containing double bonds used in the examples is O-methylacrylamide chitosan quaternary ammonium salt; the preparation method of O-methylacrylamide chitosan quaternary ammonium salt refers to the synthesis and preparation of O-methylacrylamide chitosan quaternary ammonium salt in Section 1.2 of (Antibacterial Properties of Reactive Chitosan Quaternary Ammonium Salts and Their Application in the Aftertreatment of Mulberry Silk Fabrics, Zhang Wei, Dai Xinlan, etc., Dyeing and Finishing Auxiliaries, Vol. 33, No. 12, 2016).

[0056] The volcanic mud nylon filament used in the examples is provided by Qiaolan (Shanghai) Textile Technology Co., Ltd. The twisting method: positive twist / S twist, yarn count: 40D. Volcanic mud textiles have special properties of many elements, have beneficial physiological effects on the human body and its chemical stability, and will not change or deteriorate over time. Volcanic mud is non-toxic, non-allergenic and quite safe. Because it will be beneficial to the human body current and relieve muscle tension, it is very suitable for physical health care. Volcanic mud fiber has good mechanical properties, high emissivity of far-infrared rays, high moisture absorption and antibacterial properties.

[0057] Spandex filament, 40D;

[0058] Full computer-controlled single cylinder jacquard knitting circular machine, model SM8-TOP2 MP2, brand: Santoni, SM8-TOP2MP2 is an 8-way single-sided plain electronic jacquard knitting circular machine.

[0059] The oil agent used in the examples is Goulston Lurol PS-11748, specifically Lurol PS-11748-40%, which is an oil agent suitable for polyester fillers and wet-laid chopped fibers. It is non-ionic, does not require a cross-linking agent, and can provide semi-permanent softness and hydrophilicity to the fibers. The specific dilution steps are as follows: Add Lurol PS-11748-40% (heated to 40°C and stirred before use) to warm water (35°C - 50°C). Stir continuously until a translucent clear liquid is formed; the concentration used is 0.2 wt%.

[0060] The polyester chips used in the examples are PET chips, model: BG802, purchased from Yangzhou Xindong Trade Development Co., Ltd.

[0061] Next, specific embodiments of the present invention will be combined to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0062] Example 1

[0063] A far-infrared heat storage, warm-keeping and antibacterial sports fabric includes a surface layer and a lining layer; the surface layer yarn is bamboo charcoal fiber; the lining layer yarn is spandex core-spun yarn; among this far-infrared heat storage, warm-keeping and antibacterial sports fabric, the weight percentage of bamboo charcoal fiber is 60 wt%, and the weight percentage of spandex core-spun yarn is 40 wt%.

[0064] The preparation method of the bamboo charcoal fiber includes the following steps:

[0065] (1) Melting and blending: Mix 50nm bamboo charcoal powder and polyester chips to obtain a premix, and then melt and blend the above premix and slice to obtain bamboo charcoal polyester chips; the content of bamboo charcoal powder is 20 wt% of the polyester chips;

[0066] (2) Melt spinning: The bamboo charcoal polyester chips are metered, extruded through a spinneret, cooled, oiled, stretched, heat-set, and wound to obtain bamboo charcoal fiber FDY yarn;

[0067] Among them, the melting and blending in step (1) is carried out in a twin-screw extruder, and the melting and blending temperature is 290°C.

[0068] Among the process parameters of melt spinning in step (2) are:

[0069] Extrusion temperature: 290°C;

[0070] Cooling temperature: 25°C;

[0071] Network pressure: 0.3 MPa;

[0072] Speed of the first roller: 2300 m / min;

[0073] Temperature of the first roller: 80 °C;

[0074] Speed of the second roller: 3300 m / min;

[0075] Temperature of the second roller: 120 °C;

[0076] Winding speed is 5000 r / min;

[0077] Among them, in step (2), the spinneret plate is provided with cross-shaped spinneret holes.

[0078] Among them, in step (2), the oil agent used in the oiling process is Lurol PS-11748, and the use concentration is 0.2 wt%.

[0079] (3) DTY process: The above-mentioned bamboo charcoal fiber FDY yarn is made into bamboo charcoal fiber through a wire guide tube, network, heating and stretching, twisting, heat setting, and winding forming, that is, bamboo charcoal DTY fiber is obtained.

[0080] Among them, the DTY process in step (3) is as follows:

[0081] Spinning speed: 600 m / min;

[0082] Temperature of the first hot box: 180 °C;

[0083] Temperature of the second hot box: 180 °C;

[0084] Compressed air: 0.1 MPa;

[0085] Draft ratio: 1.05.

[0086] The spandex core-spun yarn includes a core yarn and a covering yarn. The covering yarn is wrapped around the surface of the core yarn. The core yarn is spandex yarn, and the covering yarn is volcanic mud nylon yarn. Among them, the mass percentage of the core yarn in the spandex core-spun yarn is 20 wt%, and the mass percentage of the covering yarn in the spandex core-spun yarn is 80 wt%;

[0087] The preparation method of the spandex core-spun yarn includes the following steps: The spandex yarn is fed into the roller, pre-drafted by 3.0 times, and fed into the front roller nip through the wire guide wheel; the volcanic mud nylon yarn converges with the spandex yarn at the front roller through the back roller and the middle roller, and forms a core-spun yarn under the twisting action of the ring spinning frame; among them, the ring spinning frame used in the present invention is a ring spinning frame; among them, the spindle speed of the ring spinning frame is 8000 rpm, and the twist factor of the ring spinning frame is 500.

[0088] A preparation method of a far-infrared heat storage, warmth-keeping and antibacterial sports fabric, comprising the following steps: knitting a plain stitch fabric on a full-computer-controlled single-cylinder jacquard knitting circular machine, with the front layer and the inner layer of the fabric feeding yarns simultaneously. The front layer selects bamboo charcoal fiber, and the inner layer selects spandex core-spun yarn; using a full-computer-controlled single-cylinder jacquard knitting circular machine, knitting in a cycle of 8 yarns. The first, third, fifth, and seventh yarns use the front layer yarns, and the second, fourth, sixth, and eighth yarns use the inner layer yarns.

[0089] Example 2

[0090] It is basically the same as Example 1, with the only difference being that modified bamboo charcoal powder is used instead of bamboo charcoal powder;

[0091] The preparation method of the modified bamboo charcoal powder comprises the following steps:

[0092] S1 Treat 50nm bamboo charcoal powder with an electromagnetic field of 8000Hz for 30min to obtain pretreated bamboo charcoal powder;

[0093] S2 Mix the pretreated bamboo charcoal powder and N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane (or triethoxysilane) evenly in a 20wt% ethanol aqueous solution, heat to 85°C and react for 5h. After the reaction, centrifuge to obtain the precipitate, wash and dry to obtain amino-containing bamboo charcoal powder; the mass ratio of the pretreated bamboo charcoal powder, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane (or triethoxysilane), and ethanol aqueous solution is 1:0.5:30;

[0094] S3 Mix 3 parts by weight of chitosan quaternary ammonium salt containing double bonds, 2 parts by weight of maleic anhydride, 1 part by weight of N,N-methylenebisacrylamide, and 1 part by weight of acrylic acid evenly in 100 parts by weight of water, heat to 85°C and react for 60min, then add 5 parts by weight of 5wt% ammonium persulfate aqueous solution and 0.5 part by weight of mercaptoacetic acid, continue to react for 5h, cool to room temperature, adjust the pH to neutral, and filter to obtain a copolymer solution;

[0095] S4 Mix 0.25 part by weight of 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride and 0.25 part by weight of N-hydroxysuccinimide evenly in 0.5 part by weight of the copolymer solution, stir at room temperature for 30min, then add 1 part by weight of amino-containing bamboo charcoal powder, adjust the pH to 6.5, and continue to react for 12h. After the reaction, centrifuge to obtain the precipitate, wash and freeze-dry to obtain modified bamboo charcoal powder.

[0096] Example 3

[0097] Basically the same as Example 2, except that: modified bamboo charcoal powder is used instead of bamboo charcoal powder; the preparation method of the modified bamboo charcoal powder includes the following steps: adding 50nm bamboo charcoal powder and N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane into 20wt% ethanol aqueous solution, mixing evenly, heating to 85°C and reacting for 5h. After the reaction, centrifuge to obtain the precipitate, wash and dry to get the modified bamboo charcoal powder; the mass ratio of bamboo charcoal powder, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane and ethanol aqueous solution is 1:0.5:30.

[0098] Example 4

[0099] Basically the same as Example 2, except that: modified bamboo charcoal powder is used instead of bamboo charcoal powder;

[0100] The preparation method of the modified bamboo charcoal powder includes the following steps:

[0101] Add 0.25 parts by weight of 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride and 0.25 parts by weight of N-hydroxysuccinimide into 0.5 parts by weight of (3wt%) chitosan quaternary ammonium salt aqueous solution containing double bonds, mix evenly and stir at room temperature for 30min, then add 1 part by weight of 50nm bamboo charcoal powder, adjust the pH to 6.5, and continue to react for 12h. After the reaction, centrifuge to obtain the precipitate, wash and freeze-dry to get the modified bamboo charcoal powder.

[0102] Test Example 1

[0103] Refer to GB / T20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Oscillation method" to test the antibacterial properties of the fabric in Example 1; Test bacteria: Staphylococcus aureus (ATCC6538), Escherichia coli (ATCC8099), Candida albicans (ATCC 10231).

[0104] Test results: The antibacterial rate against Staphylococcus aureus is 99%; the antibacterial rate against Escherichia coli is 99%; the antibacterial rate against Candida albicans is 95%.

[0105] Test Example 2

[0106] Refer to GB / T30127-2013 "Detection and evaluation of far-infrared properties of textiles" for far-infrared performance testing. The detection report number is ZFLJ30205157.

[0107] Table 1 Test results of far-infrared properties of the fabric

[0108] Far-infrared emissivity Far-infrared radiation temperature rise value / °C Example 1 0.91 11.6

[0109] Test Example 3

[0110] Refer to GB / T 21655.2-2019 "Evaluation of moisture absorption and quick-drying properties of textiles - Part 2: Dynamic moisture transfer method" to conduct moisture absorption and quick-drying tests on the fabric of Example 1. The detection report number is TTTS-WT22136666;

[0111] Table 2 Test results of moisture absorption and quick-drying properties of the fabric

[0112]

[0113] Test Example 4

[0114] Refer to GB / T4802.1-2008 to conduct pilling and fuzzing performance tests on the fabric of Example 1. The detection report number is: A2210374220122C;

[0115] Pilling and fuzzing grade:

[0116] 5 No change;

[0117] 4 Slight fuzzing and / or slight pilling on the surface;

[0118] 3 Moderate fuzzing and / or moderate pilling on the surface; Parts of the specimen surface are covered by balls of different sizes and densities.

[0119] 2 Obvious fuzzing and / or pilling on the surface; Most of the specimen surface is covered by balls of different sizes and densities.

[0120] 1 Severe fuzzing and / or pilling on the surface; The entire specimen surface is covered by balls of different sizes and densities.

[0121] Parameter category E: Pressure 780 cN, fuzzing 0 times, pilling 600 times.

[0122] Test result: The pilling and fuzzing performance level of the fabric prepared in this application is 4 - 5, so the fabric has excellent performance.

[0123] Test Example 5

[0124] Refer to GB / T 14337-2022 "Test method for tensile properties of staple chemical fibers", use a single fiber electronic strength tester to test fiber strength, with a pre-tension of 0.15 cN / dtex, a tensile speed of 20 mm / min, a clamping distance of 20 mm, and stretch the fiber to break at a constant speed, and take the average value after testing 50 groups.

[0125] Conduct mechanical property tests on the bamboo charcoal fibers prepared in each example.

[0126] Table 3 Test results of breaking strength of bamboo charcoal fibers

[0127] Breaking strength (CN / dtex) Example 1 3.1 Example 2 3.8 Example 3 3.5

[0128] Test Example 6

[0129] The antibacterial performance test was carried out with reference to GB / T20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Oscillation method"; the test strains were Staphylococcus aureus (ATCC6538), Escherichia coli (ATCC8099), and Candida albicans (ATCC10231). The fabrics obtained in each example were subjected to standard washing for different times according to the simplified washing conditions and procedures in Appendix C of FZ / T73023-2006 "Antibacterial knitted fabrics". The washing conditions were: 2g / L standard synthetic washing machine, bath ratio 1:30, water temperature 40±3°C, put in the sample, wash for 5 minutes, and then wash with tap water at room temperature for 2 minutes, which was recorded as one wash. The antibacterial properties of the fabrics after different washing times were detected. The washing times were 50 times, and the antibacterial rate after washing 50 times was tested.

[0130] Table 4 Test results of persistent antibacterial performance

[0131]

[0132] Due to the small particle size of bamboo charcoal powder, large surface energy, easy agglomeration, and poor compatibility with polyester chips, on this basis, silane coupling agent was used to treat bamboo charcoal powder to increase its dispersion performance and reduce the agglomeration effect. At the same time, a copolymer was prepared with chitosan quaternary ammonium salt containing double bonds, maleic anhydride, N,N-methylenebisacrylamide, and acrylic acid as the main raw materials; then it reacted with amino-functionalized bamboo charcoal powder under the action of 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride and N-hydroxysuccinimide to form a dense three-dimensional network structure, effectively improving the dispersion performance of bamboo charcoal powder and at the same time improving its compatibility with polyester. Therefore, in this application, modified bamboo charcoal powder was introduced into polyester chips to prepare bamboo charcoal fibers. The bamboo charcoal powder and chitosan quaternary ammonium salt interacted synergistically to effectively improve its antibacterial performance, and at the same time, the introduction of modified bamboo charcoal powder could improve its mechanical properties.

[0133] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A far-infrared heat storage, warmth retention and antibacterial sports fabric, characterized in that: It includes a surface layer and a lining layer; the yarn of the surface layer is bamboo charcoal fiber; the yarn of the lining layer is spandex core-spun yarn; The preparation method of the bamboo charcoal fiber includes the following steps: (1) Melting and blending: Mix modified bamboo charcoal powder and polyester chips to obtain a premix, and then slice the premix after melting and blending to obtain bamboo charcoal polyester chips; (2) Melt spinning: Meter the bamboo charcoal polyester chips, extrude them through a spinneret, cool, oil, stretch, heat-set, and wind them to obtain bamboo charcoal fiber FDY yarn; (3) DTY process: Pass the above-mentioned bamboo charcoal fiber FDY yarn through a godet tube, network, heat stretching, twisting, heat setting, and winding and forming to obtain bamboo charcoal fiber, that is, bamboo charcoal DTY fiber is obtained; The preparation method of the modified bamboo charcoal powder includes the following steps: S1 Treat the bamboo charcoal powder with an electromagnetic field of 6000 - 15000 Hz for 30 - 50 min to obtain pretreated bamboo charcoal powder; S2 Add the pretreated bamboo charcoal powder and amino silane coupling agent to a 20 - 50 wt% ethanol aqueous solution, mix evenly, heat to 85 - 100 °C and react for 5 - 10 h. After the reaction, centrifuge to obtain the precipitate, wash, and dry to obtain amino-containing bamboo charcoal powder; the mass ratio of the pretreated bamboo charcoal powder, amino silane coupling agent, and 20 - 50 wt% ethanol aqueous solution is 1:(0.3 - 1):30 - 60; S3 Add 1 - 5 parts by weight of chitosan quaternary ammonium salt containing double bonds, 1 - 3 parts by weight of maleic anhydride, 1 - 2 parts by weight of N,N-methylenebisacrylamide, and 1 - 2 parts by weight of acrylic acid to 60 - 100 parts by weight of water, mix evenly, heat to 80 - 95 °C and react for 30 - 60 min, then add 5 - 10 parts by weight of 1 - 5 wt% ammonium persulfate aqueous solution and 0.1 - 1 part by weight of mercaptoacetic acid, continue to react for 3 - 5 h, cool to room temperature, adjust the pH to neutral, and filter to obtain a copolymer solution; S4 Add 0.25 - 0.5 parts by weight of 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride and 0.25 - 0.5 parts by weight of N-hydroxysuccinimide to 0.3 - 0.8 parts by weight of the copolymer solution, mix evenly and stir at room temperature for 30 min, then add 0.5 - 1 part by weight of amino-containing bamboo charcoal powder, adjust the pH to 6 - 6.5, continue to react for 8 - 12 h. After the reaction, centrifuge to obtain the precipitate, wash, and freeze-dry to obtain modified bamboo charcoal powder.

2. The far-infrared heat storage, warmth retention and antibacterial sports fabric according to claim 1, characterized in that: In this far-infrared heat storage, warm-keeping and antibacterial sports fabric, the weight percentage of bamboo charcoal fiber is 50 - 60 wt%, and the balance is spandex core-spun yarn.

3. The far-infrared heat storage, warmth retention and antibacterial sports fabric according to claim 1, characterized in that: Among them, the melting and blending in step (1) is carried out in a twin-screw extruder, and the temperature of the melting and blending is 280 - 300 °C; Among them, the process parameters of the melt spinning in step (2) are: Extrusion temperature: 280 - 300 °C; Cooling temperature: 20 - 26 °C; Network pressure: 0.2 - 0.4 MPa; Speed of the first roller: 2000 - 2500 m / min; Temperature of the first roller: 70 - 85 °C; Speed of the second roller: 3000 - 3500 m / min; Temperature of the second roller: 110 - 130 °C; Winding speed: 4000 - 6000 r / min; The spinneret plate described in step (2) is provided with cross-shaped spinneret holes and / or king-shaped spinneret holes.

4. The far-infrared heat storage, warmth retention and antibacterial sports fabric according to claim 1, characterized in that: The DTY process in step (3) is as follows: Spinning speed: 500 - 700 m / min; Temperature of the first hot box: 160 - 190 °C; Temperature of the second hot box: 160 - 190 °C; Compressed air: 0.08 - 0.13 MPa; Draft ratio: 1.00 - 1.

10.

5. The far-infrared heat storage, warmth retention and antibacterial sports fabric according to claim 1, characterized in that: The spandex core-spun yarn includes a core yarn and a covering yarn. The covering yarn is wrapped around the surface of the core yarn. The core yarn is spandex yarn, and the covering yarn is volcanic mud nylon yarn. The mass percentage of the core yarn in the core-spun yarn is 15 - 20%.

6. A preparation method of the far-infrared heat storage, warmth retention and antibacterial sports fabric according to any one of claims 1-5, characterized in that: It includes the following steps: Knit a plain jersey stitch on a fully computer-controlled single cylinder jacquard knitting circular machine. Yarns are fed simultaneously to both the fabric surface layer and the inner layer. Bamboo charcoal fiber is selected for the surface layer, and spandex core-spun yarn is selected for the inner layer.

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