Assembly line production and preparation process of cool cotton fiber bedding fabric

Abstract

The invention discloses an assembly line production and preparation process of cool cotton fiber bedding fabric, and relates to the technical field of fabric preparation processes, and the assembly line production and preparation process comprises the following steps: preparing improved cool cotton fibers; producing cool cotton threads through a spinning procedure of siro compact spinning; weaving a cool antibacterial super-soft multifunctional bedding fabric; a dyeing and finishing process is carried out on the cool-feeling antibacterial super-soft multifunctional bedding fabric. Natural mint cool feeling factors can be connected into loose cotton fibers to effectively prepare improved cool feeling cotton fibers, the improved cool feeling cotton fibers are spun into yarns in an optimized siro compact spinning mode, then the yarns are interwoven with chinlon filaments to obtain bedding fabric grey cloth, and the bedding fabric grey cloth is obtained through optimization of a dyeing and finishing process. And the green and environment-friendly cool antibacterial super-soft bedding fabric with the composite function, which is suitable for being used in summer, is researched and developed.

Description

Technical Field

[0001] The invention relates to the technical field of fabric preparation technology, and in particular to an assembly line production process for cool cotton fiber bedding fabrics. Background Art

[0002] With the advancement of modern technology and the accelerated pace of life, people's demand and expectations for high-speed rail services are also increasing, and comfortable and hygienic bedding has gradually become one of the concerns.

[0003] In different climate conditions, the human body will constantly carry out complex energy exchanges with the surrounding environment. The human body's comfort depends on the balance of this energy exchange, that is, the heat generated or lacked by the body is equal to the heat dissipated or absorbed to the external environment. At the same time, the human body has a perfect body temperature regulation mechanism, which can adapt to the climate change of the environment and maintain a constant body temperature. However, if the level of temperature and humidity changes exceeds the range of human body temperature regulation, the human body will feel cold, hot, damp, stuffy and other discomforts, which may have a negative impact on people's emotional health and productivity. Therefore, ensuring that the human body maintains heat and humidity balance in different climate environments is an important indicator for measuring the comfort of bedding.

[0004] However, current high-speed trains are all closed carriages with a large flow of people. It is difficult to replace bedding textiles used in sleeper carriages, such as complete sets, quilt covers, and sheets, in a timely manner, and cross-infection is very likely to occur. Moreover, germs are very easy to reproduce and multiply when the ambient humidity is below 38% or above 65%. Passengers are in contact with these bedding for the longest time during the journey, especially in the hot summer, when the contact area between the products and human skin is the largest. Textiles are excellent media for the attachment, reproduction, and spread of bacteria and viruses. The hygiene and comfort of these bedding products will directly affect the sleep quality and health of passengers.

[0005] In the prior art, the methods for achieving a cool touch feeling on fabrics mainly include:

[0006] 1) By adding high thermal conductivity materials to fibers through blending, melting, spinning or in-situ polymerization, the principle is to increase the conduction and heat dissipation of the human body. When the human body comes into contact with materials with high thermal conductivity, it will quickly transfer heat to get a cool feeling.

[0007] 2) Changing the cross-sectional shape of the fiber to make it a special-shaped cross-sectional fiber. The specific principle is to accelerate the evaporation process of human sweat, so that the heat can be released more quickly and effectively. The irregular cross-sections of the commonly used cooling fibers include cross-shaped fibers and flat fibers. The surface of the cross-shaped fiber has many grooves and a strong capillary effect, which promotes the conduction of water on the fabric. In addition, the large specific surface area of ​​the fiber can significantly accelerate the evaporation rate of sweat. There are more water conduction paths between the flat fibers, and the contact area with the human body is larger, which is conducive to conduction and heat dissipation.

[0008] However, most of the cooling fibers in the prior art are chemical fibers, and some, such as adding some substances with cooling properties to cellulose fibers, make the prepared fibers have cooling properties, but also lose the strength of the fibers or cause certain pressure on the environment. At the same time, due to the hot indoor temperature in summer, the air humidity in the carriage is high due to long-term use of air conditioning, which leads to the growth of a large number of molds. Therefore, it is very necessary to invent a cooling and antibacterial high-speed rail train bedding with natural cotton fibers as the matrix. Summary of the invention

[0009] To this end, the present invention provides a production line preparation process for cool cotton fiber bedding fabrics to solve the above-mentioned technical problems existing in the prior art for improving the cool feeling of traditional bedding textiles.

[0010] In order to achieve the above object, the present invention provides the following technical solutions:

[0011] A production line preparation process for a cool cotton fiber bedding fabric comprises the following steps:

[0012] Preparation of improved cool cotton fiber;

[0013] Produce cool cotton yarn through the spinning process of Siro compact spinning;

[0014] Weaving cool antibacterial ultra-soft multifunctional bedding fabric;

[0015] Dyeing and finishing process is carried out for cool, antibacterial, ultra-soft and multifunctional bedding fabrics.

[0016] On the basis of the above technical solution, the present invention is further described as follows:

[0017] As a further embodiment of the present invention,

[0018] The preparation of the improved cool cotton fiber specifically comprises:

[0019] Cotton fiber pretreatment production process;

[0020] Cationic modification production process of cotton fiber;

[0021] Cool and antibacterial composite functional modification of cotton fibers.

[0022] As a further embodiment of the present invention,

[0023] The cotton fiber pretreatment production process specifically includes:

[0024] The cotton fibers after combing and removing impurities are placed in a cage and put into a dyeing vat, and then a sodium hydroxide solution with a concentration of 3.5% and a natural active agent of dodecyl dimethyl betaine with a weight of 0.3% of the cotton fibers are added to prepare a bath liquid, and the bath ratio is 1:15; the circulation pump is started and the circulation begins, the motor power of the circulation pump is set to 25 kilowatts, and the speed of the bath liquid ejected from the cage core is maintained at 19 meters per second; the bath liquid temperature is uniformly heated to 65°C at a rate of 2°C / min and kept warm for 50 minutes; then the bath liquid temperature is cooled to 20°C and hydrogen peroxide with a concentration of 2g / L is added, the top cover of the dyeing vat is closed and the circulation pump is started, and the temperature is uniformly raised to 96°C, the pressure is increased to 145kPa, and the heat is kept for 90 minutes, and then the pressure relief valve is opened to release the pressure to the standard atmospheric pressure; and then the cotton fibers after the bath liquid is emptied are washed with water until neutral;

[0025] After pretreatment, hemicellulose, cotton wax, fructose and other substances and impurities in the cotton are removed, reducing the occurrence of photosensitivity; the cotton fiber can more gently reduce the degree of polymerization, reduce the crystalline area, and increase the amorphous area; more importantly, microscopic micron-level gaps will appear in the internal structure of the pretreated cotton fiber, allowing mint extract and nano-silicon carbide to be embedded in the interior of the cotton fiber.

[0026] As a further embodiment of the present invention,

[0027] The cationic modification production process of the cotton fiber specifically includes:

[0028] Water-soluble chitosan was selected as a cationic modifier and dissolved in deionized water in powder form to prepare a cationic solution with a concentration of 3.5%, and the temperature was raised to 80°C. The pH value was then adjusted to 5 with 0.5% glacial acetic acid, and the mixture was stirred evenly and kept warm for 60 minutes, thereby filtering to obtain a cationic modified solution.

[0029] The prepared cationic modified liquid and pretreated cotton fibers are added to the dyeing vat, wherein the weight of the modified liquid is 0.4 times the weight of the cotton fibers, and the bath ratio between the cotton fibers and the cationic modified liquid is 1:20. The temperature is then raised to 35°C and kept warm for 20 minutes, and then continued to be raised to 96°C and kept warm for 25 minutes before being taken out for washing. In this way, the cotton fibers are cationically modified and have a positive charge, providing the prerequisite for the next step of adsorbing the negatively charged mint extract slurry and nano-silicon carbide.

[0030] As a further embodiment of the present invention,

[0031] The cooling and antibacterial composite functional modification of cotton fibers specifically includes:

[0032] The mint extract slurry is added into softened water at a specific temperature, and then sodium carboxymethyl cellulose and nano silicon carbide powder are added respectively to prepare a composite functional modifier;

[0033] The prepared composite functional modifier and the cationic modified cotton fiber are added into the dyeing vat, and thermal insulation modification is performed at a specific temperature, so that the silicon carbide and mint extract slurry with a thermal conductivity of up to 400 is fixed to avoid the overflow of functional components. The addition of silicon carbide makes the cotton fiber conduct heat faster, improves the contact coolness of the cotton fiber, and increases the wear resistance and friction color fastness of the cotton fiber.

[0034] Specifically, a mint extract slurry is added to 45° C. softened water according to 3% of the weight of cotton fiber, and then 1.2% of sodium carboxymethyl cellulose and 2% of nano silicon carbide powder are added respectively in an amount of 1.2% of the weight of the cotton fiber, wherein the nano silicon carbide particle size in the 2% nano silicon carbide powder is set to 100 nanometers, the silicon dioxide content is ≥98.5%, the iron oxide content is ≤0.5%, the magnetic content is ≤0.1%, and the density is 3.3-3.5 g / cm 3 ; After stirring the whole for 30 minutes, filtering and preparing the composite functional modifier;

[0035] Add the prepared composite functional modifier and the cationic modified cotton fiber into the dyeing vat, the bath ratio between the cotton fiber and the composite functional modifier is 1:12, and start the pump circulation for thermal insulation modification, specifically: first, uniformly heat to 50°C and keep warm for 20 minutes, then uniformly heat to 80°C and keep warm for 30 minutes, and finally uniformly heat to 99°C, close the dyeing vat cover, increase the pressure to 150kPa and keep warm for 4 hours, until the thermal insulation modification is completed and then reduce the pressure to standard atmospheric pressure, and wash and cool the thermal insulation modified cotton fiber with 20°C soft water;

[0036] The cotton fiber after the heat preservation modification treatment was then placed in a 60°C soap solution with a concentration of 3 g / L for 10 minutes, and then further washed with water and dried, thereby obtaining an improved cool antibacterial cotton fiber.

[0037] Through the above-mentioned process, silicon carbide and mint extract slurry are embedded into the cavity on the inner surface of the cotton fiber, rather than just being stained on the surface of the fiber, so that the instantaneous cool feeling of the cotton fiber upon contact and the durability of its function are significantly improved, thereby maximizing the cool and antibacterial properties of the cotton fiber; in addition, the content of functional ingredients decreases from the outside to the inside, and will not affect the strong physical indicators of the fiber.

[0038] As a further embodiment of the present invention,

[0039] The production of cool cotton yarn through the spinning process of Siro compact spinning specifically includes:

[0040] Spinning through the siro compact spinning process makes the yarn coating more compact, less hairy, and enhances the cohesion of cotton fibers, reduces the gap between fibers, and thus reduces the trapped air in the fabric, which is more conducive to heat conduction;

[0041] In order to reduce yarn breakage and improve yarn evenness, a smaller back zone drafting multiple is adopted;

[0042] When spinning 40S siro tight cool yarn on a large scale, the total drafting multiple of the yarn is 60 times, of which the back zone drafting is 1.25 times, the yarn twist coefficient is 365, and the twist is 948 twists / m.

[0043] As a further embodiment of the present invention,

[0044] The woven cool antibacterial ultra-soft multifunctional bedding fabric specifically comprises:

[0045] Improved cool cotton fibers are knitted and interwoven with nylon filaments. TTC tissue is used in the knitting process to cover nylon with cotton, achieving the functional effect of cotton on the front and nylon on the back, making the overall hand feel soft and smooth. At the same time, the tissue structure is tighter than conventional single-sided fabric, and the anti-snagging level is higher.

[0046] The specific weaving process parameters are set as follows:

[0047] 1) Cotton: 40S 92.5%, Spandex: 30D 7.5%

[0048] 2) Machine gauge: 24 needles / 25.4mm

[0049] 3) Diameter: 812.8mm

[0050] 4) Number of channels: 128F

[0051] 5) Mass per unit area: 198g·m 2 .

[0052] As a further embodiment of the present invention,

[0053] The dyeing and finishing process for the cool antibacterial ultra-soft multifunctional bedding fabric specifically includes:

[0054] After alkaline oxygen scouring and bleaching, polishing enzyme is used to remove the hairiness of the cloth to make the cloth smoother.

[0055] During the dyeing process of nylon, an aqueous dispersion system of pyrithione zinc complex antibacterial agent is added to the same bath. Since the zinc ions contained in the aqueous dispersion system of pyrithione zinc complex can quickly combine with the sulfhydryl group of enzyme protein in bacteria, the enzyme will lose its activity and thus kill the bacteria. Therefore, the antibacterial rate against Escherichia coli, Staphylococcus aureus and Candida albicans reaches more than 99.9%. Finally, mercerized finishing is carried out to increase the smoothness of the fabric, increase heat conduction and enhance the cool touch feeling of the fabric.

[0056] As a further embodiment of the present invention,

[0057] The scouring process prescription and conditions are as follows:

[0058] Prepare 3g / L caustic soda, 2.6g / L hydrogen peroxide (27.5%), 0.24g / L hydrogen peroxide stabilizer, 1g / L scouring emulsifier, 0.5g / L scouring agent, temperature 98℃, holding time 30min, bath ratio between bedding fabric and dye solution 1:20;

[0059] The refined bedding fabric is further subjected to acid washing and deoxidation processes, and treated with 1% polishing enzyme at 50°C for 30 minutes to remove the fabric hairiness.

[0060] The nylon dyeing process prescription and conditions are as follows:

[0061] Acid blue Blue AFN 0.020%, acid turquoise blue Blue 3G 0.058%, acid leveling agent HT-35N with a concentration of 1g / L, antibacterial agent Reputex 48 1.5%, glacial acetic acid with a concentration of 0.2g / L;

[0062] After dyeing nylon with acid dyes, it is further fixed with an acidic fixing agent, i.e. HT-GL at a concentration of 2g / L, to ensure color fastness to washing;

[0063] The specific nylon dyeing process is shown in the following table:

[0064]

[0065] Among them, the vertical direction is the temperature change amplitude, and the horizontal direction is the duration change amplitude.

[0066] As a further embodiment of the present invention,

[0067] The dyeing and finishing process for the cool antibacterial ultra-soft multifunctional bedding fabric specifically includes:

[0068] Cotton dyeing process, the specific cotton dyeing process prescription and conditions are as follows:

[0069] Active Yellow 4GL 0.003 5%, Active Blue BRF 0.030 0%, Active Turquoise BlueST-G 0.3500%, 42g / L sodium sulfate, 1g / L alkali substitute powder KN;

[0070] The specific cotton dyeing process is shown in the following table:

[0071]

[0072] Among them, the vertical direction is the temperature change amplitude, the horizontal direction is the time change amplitude, and the corresponding time of dye, sodium sulfate and alkali is their respective dissolution time limit;

[0073] Finishing process;

[0074] After the bedding fabric is dyed and taken out of the vat, it continues to be dehydrated, slit and dried, and then the dry cloth is dipped in a mercerizing finishing agent with a concentration of 60g / L, and citric acid is used to adjust the pH range of the dip solution to 4.5-5.0, and the finished product is shaped at a temperature of 140°C for 2-3 minutes.

[0075] The present invention has the following beneficial effects:

[0076] 1. Pre-treatment of cotton fibers after combing and removing impurities by immersing them in a bath made of sodium hydroxide solution and dodecyl dimethyl betaine natural active agent not only reduces the polymerization degree of cotton fibers, reduces the crystalline area, increases the amorphous area, but more importantly, causes microscopic micron-level gaps to appear in the internal structure of cotton fibers;

[0077] After being modified with water-soluble chitosan as a cationic modifier, the cotton fiber is made to have a positive charge; the positively charged cotton fiber is heat-insulated and modified in a composite functional modifier prepared from a negatively charged natural plant mint extract, sodium carboxymethyl cellulose, and nano silicon carbide powder with a thermal conductivity similar to that of metallic copper (up to 400); silicon carbide and mint extract are embedded in the cavity of the inner surface layer of the cotton fiber to avoid overflow of functional components, rather than just being stained on the surface of the fiber. The instantaneous cool feeling of the cotton fiber and the durability of its functionality are significantly improved, the cool feeling and antibacterial properties of the cotton fiber are maximized, and the color fastness and wear resistance of the cotton fiber are significantly improved; in addition, the content of the functional ingredients decreases from the outside to the inside, and at the same time will not affect the physical indicators such as the strength of the fiber.

[0078] 2. The improved cool cotton fiber adopts the improved siro compact spinning method during spinning, so that the yarn is tightly covered and has less hairiness, which enhances the fiber cohesion and reduces the fiber gap, which can reduce the trapped air in the fabric and is beneficial to heat conduction. At the same time, the improved cool cotton fiber is knitted and interwoven with nylon filaments. The TTC structure is used in the knitting process to achieve cotton covering nylon, which can achieve the effect of cotton on the front and nylon on the back. It feels soft and smooth. At the same time, the structure is tighter than conventional single-sided cloth and has a high anti-snagging grade.

[0079] 3. Use polishing enzyme to remove the hairiness of train bedding fabrics to make the fabric surface smoother;

[0080] During the dyeing process of nylon, an antibacterial agent of an aqueous dispersion system of pyrithione zinc complex is added to the same bath. The zinc ions contained in the aqueous dispersion system of pyrithione zinc complex can quickly combine with the thiol group of the enzyme protein in the bacteria, making the enzyme inactive and thus killing the bacteria, thereby achieving an inhibition rate of more than 99% for Escherichia coli and Candida albicans. Finally, mercerizing finishing is performed, which not only increases the smoothness of the fabric, but also increases heat conduction, significantly improving the cool touch feel of the bedding fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] In order to more clearly illustrate the implementation mode of the present invention or the technical solution in the prior art, the drawings required for the implementation mode or the description of the prior art will be briefly introduced below. The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0082] Figure 1 A schematic diagram of the overall process of the production line of cool cotton fiber bedding fabric provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0083] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0084] The terms such as "upper", "lower", "left", "right", and "middle" used in this specification are only for the convenience of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships should be regarded as within the scope of the invention without substantially changing the technical content.

[0085] At present, cotton fiber is a natural fiber. Its main component, cellulose, is a natural polymer compound. Its molecular structure contains a large number of alcohol hydroxyl groups. Under standard conditions, the standard moisture regain of cotton fiber is 8.5%. Therefore, it has the characteristics of moisture absorption, breathability, soft hand feeling and comfortable wearing, and is widely used in the development of various clothing fabrics. However, the structure of cotton fiber has a central cavity, which contains a certain amount of air. At the same time, cotton fiber is short, and there are a lot of fiber gaps in the yarn, which are conducive to warmth preservation but not conducive to the development of cool summer fabrics. In addition, cotton fiber is easily eroded by bacteria and mold in the humid environment in summer, which also brings inconvenience to people's lives.

[0086] The main component of mint is menthol, which is about 77-78%, followed by menthone, which is 8-12%. It also contains menthyl acetate, camphene, limonene, isomenthone, pinene, menthyl ketone, resin and a small amount of tannin and rosmarinic acid. Menthol and menthone can activate the cold receptors on the skin, which are very sensitive to temperature changes and cause cold sensations. At the same time, menthol and menthone have antibacterial, anti-inflammatory and antioxidant effects, which are more helpful in protecting the health of the skin.

[0087] Therefore, in this embodiment, improved cool cotton fibers are prepared by introducing natural mint cool factors into loose cotton fibers. The new cool cotton fibers are spun into yarns through an improved siro compact spinning method, and then interwoven with nylon filaments to obtain bedding fabrics. Through the optimization of the dyeing and finishing process, green and environmentally friendly cool, antibacterial and ultra-soft composite functional bedding that is more suitable for summer use is developed to meet market demand, thereby effectively improving the product added value of the bedding and significantly improving the market competitiveness of the product.

[0088] like Figure 1 As shown, an embodiment of the present invention provides an assembly line production process for cool cotton fiber bedding fabrics, which can effectively produce improved cool cotton fibers by introducing natural mint cool factors into loose cotton fibers. The improved cool cotton fibers are spun into yarns through an optimized siro compact spinning method, and then interwoven with nylon filaments to obtain bedding fabric grey cloth. Through the optimization of the dyeing and finishing process, a green, environmentally friendly, cool, antibacterial, and ultra-soft composite functional train bedding fabric suitable for use in summer is developed.

[0089] The main process of the above production and preparation process is as follows: cotton fiber pretreatment → cotton fiber cationic modification → cotton fiber composite functional modification → siro compact spinning → interlacing with nylon filament knitting → dyeing and finishing. The main process of the dyeing and finishing process is: scouring → cotton dyeing → nylon dyeing → finishing. It specifically includes the following steps:

[0090] S1: Preparation of improved cool cotton fiber;

[0091] S101: Cotton fiber pretreatment production process;

[0092] The cotton fibers after combing and removing impurities are placed in a cage and put into a dyeing vat, and then a sodium hydroxide solution with a concentration of 3.5% and a natural active agent of dodecyl dimethyl betaine with a weight of 0.3% of the cotton fibers are added to prepare a bath liquid, and the bath ratio is 1:15; the circulation pump is started and the circulation begins, the motor power of the circulation pump is set to 25 kilowatts, and the speed of the bath liquid ejected from the cage core is maintained at 19 meters per second; the bath liquid temperature is uniformly heated to 65°C at a rate of 2°C / min and kept warm for 50 minutes; then the bath liquid temperature is cooled to 20°C and hydrogen peroxide with a concentration of 2g / L is added, the top cover of the dyeing vat is closed and the circulation pump is started, and the temperature is uniformly raised to 96°C, the pressure is increased to 145kPa, and the heat is kept for 90 minutes, and then the pressure relief valve is opened to release the pressure to the standard atmospheric pressure; and then the cotton fibers after the bath liquid is emptied are washed with water until neutral;

[0093] After pretreatment, the cotton fiber is free of hemicellulose, cotton wax, fructose and other substances and impurities, which reduces the occurrence of photosensitivity; the cotton fiber can more gently reduce the degree of polymerization, reduce the crystalline area, and increase the amorphous area; more importantly, microscopic micrometer-level gaps will appear in the internal structure of the pretreated cotton fiber to ensure that the mint extract and nano-silicon carbide are embedded in the cotton fiber;

[0094] S102: Cationic modification production process of cotton fiber;

[0095] Water-soluble chitosan was selected as a cationic modifier and dissolved in deionized water in powder form to prepare a cationic solution with a concentration of 3.5%, and the temperature was raised to 80°C. The pH value was then adjusted to 5 with 0.5% glacial acetic acid, and the mixture was stirred evenly and kept warm for 60 minutes, thereby filtering to obtain a cationic modified solution.

[0096] The prepared cationic modified liquid and the pretreated cotton fiber are added into the dyeing vat, wherein the weight of the modified liquid is 0.4 times the weight of the cotton fiber, and the bath ratio between the cotton fiber and the cationic modified liquid is 1:20. Then, the temperature is first raised to 35°C and kept warm for 20 minutes, and then the temperature is further raised to 96°C and kept warm for 25 minutes before being taken out for washing. In this way, the cotton fiber is cationic-modified so that the cotton fiber has a positive charge, which provides the prerequisite for the next step of adsorbing the negatively charged mint extract slurry and nano-silicon carbide.

[0097] S103: Cooling and antibacterial composite functional modification of cotton fibers;

[0098] The mint extract slurry is added into softened water at a specific temperature, and then sodium carboxymethyl cellulose and nano silicon carbide powder are added respectively to prepare a composite functional modifier;

[0099] The prepared composite functional modifier and the cationic modified cotton fiber are added into the dyeing vat, and thermal insulation modification is performed at a specific temperature, so that the silicon carbide and mint extract slurry with a thermal conductivity of up to 400 is fixed to avoid the overflow of functional components. The addition of silicon carbide makes the cotton fiber conduct heat faster, improves the contact coolness of the cotton fiber, and increases the wear resistance and friction color fastness of the cotton fiber.

[0100] Specifically, a mint extract slurry is added to 45° C. softened water according to 3% of the weight of cotton fiber, and then 1.2% of sodium carboxymethyl cellulose and 2% of nano silicon carbide powder are added respectively in an amount of 1.2% of the weight of the cotton fiber, wherein the nano silicon carbide particle size in the 2% nano silicon carbide powder is set to 100 nanometers, the silicon dioxide content is ≥98.5%, the iron oxide content is ≤0.5%, the magnetic content is ≤0.1%, and the density is 3.3-3.5 g / cm 3 ; After stirring the whole for 30 minutes, filtering and preparing the composite functional modifier;

[0101] Add the prepared composite functional modifier and the cationic modified cotton fiber into the dyeing vat, the bath ratio between the cotton fiber and the composite functional modifier is 1:12, and start the pump circulation for thermal insulation modification, specifically: first, uniformly heat to 50°C and keep warm for 20 minutes, then uniformly heat to 80°C and keep warm for 30 minutes, and finally uniformly heat to 99°C, close the dyeing vat cover, increase the pressure to 150kPa and keep warm for 4 hours, until the thermal insulation modification is completed and then reduce the pressure to standard atmospheric pressure, and wash and cool the thermal insulation modified cotton fiber with 20°C soft water;

[0102] The cotton fiber after the heat preservation modification treatment was then placed in a 60°C soap solution with a concentration of 3 g / L for 10 minutes, and then further washed with water and dried, thereby obtaining an improved cool antibacterial cotton fiber.

[0103] Through the above process, the silicon carbide and mint extract slurry are embedded into the cavity of the inner surface of the cotton fiber, rather than just contaminated on the fiber surface, so that the instantaneous cool feeling of the cotton fiber and its functional durability are significantly improved, and the cool antibacterial properties of the cotton fiber are maximized; in addition, the content of functional ingredients decreases from the outside to the inside, and will not affect the physical indicators of the fiber such as strength;

[0104] S2: Produce cool cotton yarn through the spinning process of Siro compact spinning;

[0105] In order to achieve a cool, soft and comfortable bedding, the improved Siro compact spinning method is used in spinning, which makes the yarn coating more compact, less hairy, and enhances the cohesion of cotton fibers, reduces the gap between fibers, and thus reduces the trapped air in the fabric, which is more conducive to heat conduction;

[0106] In order to reduce yarn breakage and improve yarn evenness, a smaller back-zone drafting multiple is adopted; when spinning 40S siro tight cool yarn on a large scale, the total yarn drafting multiple is 60 times, of which the back-zone drafting is 1.25 times, the yarn twist coefficient is 365, and the twist is 948 twists / m;

[0107] S3: Woven cool antibacterial ultra-soft multifunctional bedding fabric;

[0108] In order to make the bedding fabric softer, smoother and more comfortable, improved cool cotton fiber and nylon filament are knitted and interwoven. TTC tissue is used in the knitting process to cover nylon with cotton, so that the front side is cotton and the back side is nylon, making the overall hand feel soft and smooth. At the same time, the tissue structure is tighter than conventional single-sided cloth and has a higher anti-snagging level. The specific weaving process parameters are set as follows:

[0109] 1) Cotton: 40S 92.5%, Spandex: 30D 7.5%

[0110] 2) Machine gauge: 24 needles / 25.4mm

[0111] 3) Diameter: 812.8mm

[0112] 4) Number of channels: 128F

[0113] 5) Mass per unit area: 198g·m 2 ;

[0114] S4: Dyeing and finishing process for cool, antibacterial, ultra-soft and multifunctional bedding fabrics;

[0115] The specific process is as follows: bleaching by alkaline oxygen refining, and then using polishing enzyme to remove the hairiness of the cloth to make the cloth smoother; since the zinc ions contained in the aqueous dispersion system of pyrithione zinc complex can quickly combine with the thiol group of the enzyme protein in the bacteria, the enzyme loses its activity, thereby killing the bacteria. Therefore, during the nylon dyeing process, the aqueous dispersion system antibacterial agent of pyrithione zinc complex is added to the same bath, and the antibacterial rate of Escherichia coli, Staphylococcus aureus, and Candida albicans reaches more than 99.9%; finally, mercerized finishing is performed, which can increase the smoothness of the fabric, increase heat conduction, and enhance the cool feeling when touching;

[0116] More specific dyeing and finishing processes are as follows:

[0117] S401: Scouring process;

[0118] The specific scouring process prescription and conditions are as follows:

[0119] Prepare 3g / L caustic soda, 2.6g / L hydrogen peroxide (27.5%), 0.24g / L hydrogen peroxide stabilizer, 1g / L scouring emulsifier, 0.5g / L scouring agent, temperature 98℃, holding time 30min, bath ratio between bedding fabric and dye solution 1:20;

[0120] The refined bedding fabric is further subjected to acid washing and deoxidation processes, and treated with 1% polishing enzyme at 50°C for 30 minutes to remove the fabric hairiness.

[0121] S402: cotton dyeing process;

[0122] The specific cotton dyeing process prescription and conditions are as follows:

[0123] Active Yellow 4GL 0.003 5%, Active Blue BRF 0.030 0%, Active Turquoise BlueST-G 0.3500%, 42g / L sodium sulfate, 1g / L alkali substitute powder KN;

[0124] The specific cotton dyeing process is shown in the following table:

[0125]

[0126] Among them, the vertical direction is the temperature change amplitude, the horizontal direction is the time change amplitude, and the corresponding time of dye, sodium sulfate and alkali is their respective dissolution time limit;

[0127] S403: Nylon dyeing process;

[0128] The specific nylon dyeing process prescription and conditions are as follows:

[0129] Acid blue Blue AFN 0.020%, acid turquoise blue Blue 3G 0.058%, acid leveling agent HT-35N with a concentration of 1g / L, antibacterial agent Reputex 48 1.5%, glacial acetic acid with a concentration of 0.2g / L;

[0130] After dyeing nylon with acid dyes, it is further fixed with an acidic fixing agent, i.e. HT-GL at a concentration of 2g / L, to ensure color fastness to washing;

[0131] The specific nylon dyeing process is shown in the following table:

[0132]

[0133] Among them, the vertical direction is the temperature change amplitude, and the horizontal direction is the duration change amplitude;

[0134] S404: finishing process;

[0135] After the bedding fabric is dyed and taken out of the vat, it continues to be dehydrated, slit and dried, and then the dry fabric is dipped in a mercerizing finishing agent with a concentration of 60g / L, and the pH range of the dip solution is adjusted to 4.5-5.0 with citric acid, and the finished product is shaped at a temperature of 140°C for 2-3 minutes;

[0136] The cool, antibacterial, ultra-soft and multifunctional bedding fabric after post-processing feels soft and smooth, has a mercerized feel, and can also increase heat conduction, significantly improving the cool feeling when in contact with the fabric.

[0137] In this embodiment, the cotton fibers after combing and removing impurities are pretreated by immersing them in a bath made of sodium hydroxide solution and dodecyl dimethyl betaine natural active agent, which not only reduces the polymerization degree of the cotton fibers, reduces the crystalline area, and increases the amorphous area, but more importantly, microscopic micrometer-level gaps appear in the internal structure of the cotton fibers; after being modified by water-soluble chitosan as a cationic modifier, the cotton fibers are positively charged; the positively charged cotton fibers are heat-insulated and modified in a composite functional modifier prepared by a natural plant mint extract with a negative charge, sodium carboxymethyl cellulose, and nano silicon carbide powder with a thermal conductivity similar to that of metallic copper (up to 400), and silicon carbide and mint extract are embedded in the cavity of the inner surface layer of the cotton fibers to avoid overflow of functional components, rather than just being stained on the surface of the fibers, and the instantaneous cool feeling of the cotton fibers and the durability of the functionality are significantly improved, which maximizes the cool feeling and antibacterial properties of the cotton fibers, and significantly improves the color fastness and wear resistance of the cotton fibers. In addition, the content of functional ingredients decreases from the outside to the inside, and will not affect physical indicators such as fiber strength.

[0138] In this embodiment, in order to achieve an ultra-soft cool feeling when the bedding is used, the improved cool cotton fiber adopts an improved siro compact spinning method during spinning, so that the yarn is tightly wrapped and has less hairiness, thereby enhancing the fiber cohesion and reducing the fiber gap. This can reduce the trapped air in the fabric and is beneficial to heat conduction. In order to make the train bedding fabric soft, smooth and comfortable, the improved cool cotton fiber is knitted and interwoven with nylon filaments. During the knitting process, the TTC structure is used to cover nylon with cotton, so that the front side is cotton and the back side is nylon. It feels soft and smooth. At the same time, the structure is tighter than conventional single-sided cloth and has a high anti-snagging grade.

[0139] In this embodiment, polishing enzyme is used to remove the hairiness of train bedding fabric to make the fabric smoother; during the nylon dyeing process, an aqueous dispersion system antibacterial agent of pyrithione zinc complex is added to the same bath, and the zinc ions contained in the aqueous dispersion system of pyrithione zinc complex can quickly combine with the thiol group of enzyme protein in bacteria, so that the enzyme loses its activity and the bacteria die, thereby achieving an antibacterial rate of more than 99% for Escherichia coli and Candida albicans; finally, mercerizing finishing is performed, which not only increases the smoothness of the fabric, but also increases heat conduction, significantly improving the cool touch feeling of the bedding fabric.

[0140] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A production line process for cool cotton fiber bedding fabrics, characterized in that: The steps include: Preparation of improved cool cotton fiber; Produce cool cotton yarn through the spinning process of Siro compact spinning; Weaving cool antibacterial ultra-soft multifunctional bedding fabric; Dyeing and finishing process is carried out for cool, antibacterial, ultra-soft and multifunctional bedding fabrics.

2. The production process of the cool cotton fiber bedding fabric assembly line according to claim 1, characterized in that: The preparation of the improved cool cotton fiber specifically comprises: Cotton fiber pretreatment production process; Cationic modification production process of cotton fiber; Cool and antibacterial composite functional modification of cotton fibers.

3. The production process of the cool cotton fiber bedding fabric assembly line according to claim 2, characterized in that: The cotton fiber pretreatment production process specifically includes: The cotton fibers after combing and removing impurities are placed in a cage and put into a dyeing vat, and then a sodium hydroxide solution with a concentration of 3.5% and a natural active agent of dodecyl dimethyl betaine with a weight of 0.3% of the cotton fibers are added to prepare a bath liquid, and the bath ratio is 1:15; the circulation pump is started and the circulation begins, the motor power of the circulation pump is set to 25 kilowatts, and the speed of the bath liquid ejected from the cage core is maintained at 19 meters per second; the bath liquid temperature is uniformly heated to 65°C at a rate of 2°C / min and kept warm for 50 minutes; then the bath liquid temperature is cooled to 20°C and hydrogen peroxide with a concentration of 2g / L is added, the top cover of the dyeing vat is closed and the circulation pump is started, and the temperature is uniformly raised to 96°C, the pressure is increased to 145kPa, and the heat is kept for 90 minutes, and then the pressure relief valve is opened to release the pressure to the standard atmospheric pressure; and then the cotton fibers after the bath liquid is emptied are washed with water until neutral; After pretreatment, hemicellulose, cotton wax, fructose and other substances and impurities in the cotton are removed, reducing the occurrence of photosensitivity; the cotton fiber can more gently reduce the degree of polymerization, reduce the crystalline area, and increase the amorphous area; more importantly, microscopic micron-level gaps will appear in the internal structure of the pretreated cotton fiber, allowing mint extract and nano-silicon carbide to be embedded in the interior of the cotton fiber.

4. The production process of the cool cotton fiber bedding fabric assembly line according to claim 3, characterized in that: The cationic modification production process of the cotton fiber specifically includes: Water-soluble chitosan was selected as a cationic modifier and dissolved in deionized water in powder form to prepare a cationic solution with a concentration of 3.5%, and the temperature was raised to 80°C. The pH value was then adjusted to 5 with 0.5% glacial acetic acid, and the mixture was stirred evenly and kept warm for 60 minutes, thereby filtering to obtain a cationic modified solution. The prepared cationic modified liquid and pretreated cotton fibers are added to the dyeing vat, wherein the weight of the modified liquid is 0.4 times the weight of the cotton fibers, and the bath ratio between the cotton fibers and the cationic modified liquid is 1:

20. The temperature is then raised to 35°C and kept warm for 20 minutes, and then continued to be raised to 96°C and kept warm for 25 minutes before being taken out for washing. In this way, the cotton fibers are cationically modified and have a positive charge, providing the prerequisite for the next step of adsorbing the negatively charged mint extract slurry and nano-silicon carbide.

5. The production process of the cool cotton fiber bedding fabric assembly line according to claim 4, characterized in that: The cooling and antibacterial composite functional modification of cotton fibers specifically includes: The mint extract slurry is added into softened water at a specific temperature, and then sodium carboxymethyl cellulose and nano silicon carbide powder are added respectively to prepare a composite functional modifier; The prepared composite functional modifier and the cationic modified cotton fiber are added into the dyeing vat, and thermal insulation modification is performed at a specific temperature, so that the silicon carbide and mint extract slurry with a thermal conductivity of up to 400 is fixed to avoid the overflow of functional components. The addition of silicon carbide makes the cotton fiber conduct heat faster, improves the contact coolness of the cotton fiber, and increases the wear resistance and friction color fastness of the cotton fiber. Specifically, a mint extract slurry is added to 45° C. softened water according to 3% of the weight of cotton fiber, and then 1.2% of sodium carboxymethyl cellulose and 2% of nano silicon carbide powder are added respectively in an amount of 1.2% of the weight of the cotton fiber, wherein the nano silicon carbide particle size in the 2% nano silicon carbide powder is set to 100 nanometers, the silicon dioxide content is ≥98.5%, the iron oxide content is ≤0.5%, the magnetic content is ≤0.1%, and the density is 3.3-3.5 g / cm 3 ; After stirring the whole for 30 minutes, filtering and preparing the composite functional modifier; Add the prepared composite functional modifier and the cationic modified cotton fiber into the dyeing vat, the bath ratio between the cotton fiber and the composite functional modifier is 1:12, and start the pump circulation for thermal insulation modification, specifically: first, uniformly heat to 50°C and keep warm for 20 minutes, then uniformly heat to 80°C and keep warm for 30 minutes, and finally uniformly heat to 99°C, close the dyeing vat cover, increase the pressure to 150kPa and keep warm for 4 hours, until the thermal insulation modification is completed and then reduce the pressure to standard atmospheric pressure, and wash and cool the thermal insulation modified cotton fiber with 20°C soft water; The cotton fiber after the heat preservation modification treatment was then placed in a 60°C soap solution with a concentration of 3 g / L for 10 minutes, and then further washed with water and dried, thereby obtaining an improved cool antibacterial cotton fiber. Through the above-mentioned process, silicon carbide and mint extract slurry are embedded into the cavity on the inner surface of the cotton fiber, rather than just being stained on the surface of the fiber, so that the instantaneous cool feeling of the cotton fiber upon contact and the durability of its function are significantly improved, thereby maximizing the cool and antibacterial properties of the cotton fiber; in addition, the content of functional ingredients decreases from the outside to the inside, and will not affect the strong physical indicators of the fiber.

6. The production process of the cool cotton fiber bedding fabric assembly line according to claim 5, characterized in that: The production of cool cotton yarn through the spinning process of Siro compact spinning specifically includes: Spinning through the siro compact spinning process makes the yarn coating more compact, less hairy, and enhances the cohesion of cotton fibers, reduces the gap between fibers, and thus reduces the trapped air in the fabric, which is more conducive to heat conduction; In order to reduce yarn breakage and improve yarn evenness, a smaller back zone drafting multiple is adopted; When spinning 40S siro tight cool yarn on a large scale, the total drafting multiple of the yarn is 60 times, of which the back zone drafting is 1.25 times, the yarn twist coefficient is 365, and the twist is 948 twists / m.

7. The production process of the cool cotton fiber bedding fabric assembly line according to claim 6, characterized in that: The woven cool antibacterial ultra-soft multifunctional bedding fabric specifically comprises: Improved cool cotton fibers are knitted and interwoven with nylon filaments. TTC tissue is used in the knitting process to cover nylon with cotton, achieving the functional effect of cotton on the front and nylon on the back, making the overall hand feel soft and smooth. At the same time, the tissue structure is tighter than conventional single-sided fabric, and the anti-snagging level is higher. The specific weaving process parameters are set as follows: 1) Cotton: 40S 92.5%, Spandex: 30D 7.5% 2) Machine gauge: 24 needles / 25.4mm 3) Diameter: 812.8mm 4) Number of channels: 128F 5) Mass per unit area: 198g·m 2 .

8. The production process of cool cotton fiber bedding fabric assembly line according to claim 7, characterized in that: The dyeing and finishing process for the cool antibacterial ultra-soft multifunctional bedding fabric specifically includes: After alkaline oxygen scouring and bleaching, polishing enzyme is used to remove the hairiness of the cloth to make the cloth smoother. During the dyeing process of nylon, an aqueous dispersion system of pyrithione zinc complex antibacterial agent is added to the same bath. Since the zinc ions contained in the aqueous dispersion system of pyrithione zinc complex can quickly combine with the sulfhydryl group of enzyme protein in bacteria, the enzyme will lose its activity and thus kill the bacteria. Therefore, the antibacterial rate against Escherichia coli, Staphylococcus aureus and Candida albicans reaches more than 99.9%. Finally, mercerized finishing is carried out to increase the smoothness of the fabric, increase heat conduction and enhance the cool touch feeling of the fabric.

9. The production process of the cool cotton fiber bedding fabric assembly line according to claim 8, characterized in that: The scouring process prescription and conditions are as follows: Prepare 3g / L caustic soda, 2.6g / L hydrogen peroxide (27.5%), 0.24g / L hydrogen peroxide stabilizer, 1g / L scouring emulsifier, 0.5g / L scouring agent, temperature 98℃, holding time 30min, bath ratio between bedding fabric and dye solution 1:20; The refined bedding fabric is further subjected to acid washing and deoxidation processes, and treated with 1% polishing enzyme at 50°C for 30 minutes to remove the hairiness of the fabric. The nylon dyeing process prescription and conditions are as follows: Acid blue Blue AFN 0.020%, acid turquoise blue Blue 3G 0.058%, acid leveling agent HT-35N with a concentration of 1g / L, antibacterial agent Reputex 48 1.5%, glacial acetic acid with a concentration of 0.2g / L; After dyeing nylon with acid dyes, it is further fixed with an acidic fixing agent, i.e. HT-GL at a concentration of 2g / L, to ensure color fastness to washing; The specific nylon dyeing process is shown in the following table: Among them, the vertical direction is the temperature change amplitude, and the horizontal direction is the duration change amplitude.

10. The production process of cool cotton fiber bedding fabric assembly line according to claim 9, characterized in that: The dyeing and finishing process for the cool antibacterial ultra-soft multifunctional bedding fabric specifically includes: Cotton dyeing process, the specific cotton dyeing process prescription and conditions are as follows: Active Yellow 4GL 0.003 5%, Active Blue BRF 0.030 0%, Active Turquoise Blue ST-G 0.3500%, 42g / L sodium sulfate, 1g / L alkali substitute powder KN; The specific cotton dyeing process is shown in the following table: Among them, the vertical direction is the temperature change amplitude, the horizontal direction is the time change amplitude, and the corresponding time of dye, sodium sulfate and alkali is their respective dissolution time limit; Finishing process; After the bedding fabric is dyed and taken out of the vat, it continues to be dehydrated, slit and dried, and then the dry cloth is dipped in a mercerizing finishing agent with a concentration of 60g / L, and citric acid is used to adjust the pH range of the dip solution to 4.5-5.0, and the finished product is shaped at a temperature of 140°C for 2-3 minutes.

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