Modal blended plush skin-friendly fabric and preparation method thereof

Abstract

The invention relates to the field of cloth production, and discloses a modal blended plush skin-friendly fabric and a preparation method thereof.The preparation method comprises the steps that impurities and grease on the surface of the fabric are removed; in a high-temperature environment, a fluff effect is formed on the surface of the fabric by utilizing organosiloxane; adding an enzyme preparation to remove long hairiness on the surface of the fabric; cleaning the fabric and the like. According to the invention, the organo-siloxane additive is added into the dye vat for treatment, so that the fluff can be formed, and the equipment investment is reduced. The nanoscale membrane structure formed by compounding the organic siloxane and the polyethylene glycol not only enables the fabric to have the skin-friendly hand feeling of fluff, but also can improve the air permeability, the moisture absorption performance, the color fastness to washing, the floating color removal rate and the like of the fabric.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cloth production, in particular to a modal blended plush skin-friendly fabric and a preparation method thereof. BACKGROUND

[0002] In the prior art, the preparation of a skin-friendly fabric with a plush hand feel is generally achieved by placing the fabric in a sand washing machine, using the mechanical friction of the sand washing machine / sand mill (or adding sand washing medium such as quartz sand, pumice stone, etc.), and applying an additive (sand washing agent, softener, reducing agent, etc.) to the surface for physical friction + additive treatment, so as to raise the fibers or make them look like a worn-out denim fabric. The traditional preparation process adds a sand washing step, i.e., a sand mill is required, and the sand washing process generally takes 30-60 minutes, which means that the operation of the prior art not only increases the manufacturing cost, but also prolongs the process time.

[0003] Therefore, the prior art still needs to be improved and enhanced. SUMMARY

[0004] In view of the above shortcomings of the prior art, the present application aims to provide a modal blended plush skin-friendly fabric and a preparation method thereof, which can complete the plush hand feel treatment of the fabric in a dye vat without introducing a sand washing machine.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions: A preparation method of a modal blended plush skin-friendly fabric, comprising the following steps: Pre-treatment: adding a fabric blended with polyester and cotton in modal and a first additive to a dye vat to remove impurities and grease on the surface of the fabric; Forming a nap: adding an organosiloxane to the dye vat, the organosiloxane comprising one or both of a hydroxyl silicone oil and an amino silicone oil, and the temperature of the dye vat being 100-120℃, so as to form a nap effect on the surface of the fabric; Polishing treatment: adding an enzyme preparation to remove long hair on the surface of the fabric; Post-treatment: washing the fabric.

[0006] The preparation method of the modal blended plush skin-friendly fabric, wherein the ratio of the weight of the fabric to the volume of the liquid in the dye vat is 1: (8-12) kg / L; the first additive comprises a compounded product of C12-C14 fatty alcohol polyoxyethylene ether and sodium dodecyl benzene sulfonate; and the mass ratio of the C12-C14 fatty alcohol polyoxyethylene ether to the sodium dodecyl benzene sulfonate is 1: (2-3).

[0007] The preparation method of the modal blended plush skin-friendly fabric, wherein in the pre-treatment step, disodium ethylenediaminetetraacetate is also added to the dyeing vat, the pre-treatment temperature is 70-80 DEG C, and the treatment time is 10-15 minutes.

[0008] The preparation method of the modal blended plush skin-friendly fabric, wherein in the forming step, 0.5-1 g / L of C8-C10 fatty alcohol polyoxyethylene ether and polyethylene glycol with a molecular weight of 400 or 600 are also added to the dyeing vat, and the mass ratio of the organosiloxane to the polyethylene glycol is (3-5):1.

[0009] The preparation method of the modal blended plush skin-friendly fabric, wherein in the forming step, the fabric is heated for 50-60 minutes.

[0010] The preparation method of the modal blended plush skin-friendly fabric, wherein between the forming step and the polishing treatment, a step of dyeing the polyester in the blended fabric is further included, specifically, dispersing dyes and 1-2 g / L of polyether-modified organosilicon leveling agents are added to the dyeing vat, the ratio of the fabric weight to the liquid volume in the dyeing vat is controlled to be 1:(10-15) kg / L, and the dyeing is performed at a temperature of 130-135 DEG C for 30-45 minutes. Or between the forming step and the polishing treatment, a step of dyeing and reducing cleaning the polyester in the blended fabric is further included, the step of dyeing the polyester is that dispersing dyes and 1-2 g / L of polyether-modified organosilicon leveling agents are added to the dyeing vat, the ratio of the fabric weight to the liquid volume in the dyeing vat is controlled to be 1:(10-15) kg / L, and the dyeing is performed at a temperature of 130-135 DEG C for 30-45 minutes; the step of reducing cleaning is that sodium dithionite and sodium hydroxide are added to the dyeing vat, the pH value of the dyeing solution is controlled to be 10-11, the ratio of the fabric weight to the liquid volume in the dyeing vat is controlled to be 1:(10-15) kg / L, and the dyeing is performed at a temperature of 75-80 DEG C for 20-25 minutes.

[0011] The preparation method of the modal blended plush skin-friendly fabric, wherein between the forming step and the polishing treatment, a step of dyeing the cotton in the blended fabric is further included, active dyes are added to the dyeing vat, the dyeing vat temperature is 60-65 DEG C, sodium chloride is first added and the dyeing is performed for 20-30 minutes, then sodium carbonate is added to adjust the solution pH value to 10-11, and the dyeing is performed for 30-40 minutes.

[0012] The preparation method of the modal blended fleece skin-friendly fabric, wherein in the polishing treatment step, the enzyme preparation is neutral cellulase; citric acid-sodium citrate buffer solution is further added to adjust the pH of the solution to 6-7, and the polishing treatment is performed at a temperature of 55-60 DEG C for 50-60 minutes.

[0013] The preparation method of the modal blended fleece skin-friendly fabric, wherein in the post-treatment step, one of fatty alcohol polyoxyethylene ether sulfate and citric acid derivatives is used as a weak acid cleaning agent, and the post-treatment is performed at 95-100 DEG C for 10-15 minutes.

[0014] A modal blended fleece skin-friendly fabric is prepared by the preparation method of the modal blended fleece skin-friendly fabric.

[0015] Beneficial effects: The present application provides a modal blended fleece skin-friendly fabric and a preparation method thereof. The present application can form fleece in the dye vat by treating with an organic siloxane auxiliary, realize sand washing simulation, and reduce equipment investment. The use of pretreatment removes grease and impurities, facilitates the subsequent rapid and sufficient penetration of the organic siloxane auxiliary into the fibers, and causes the fibers to swell at high temperatures, etches the surface of the fibers, and forms uniform fleece on the surface of the fibers. The introduction of enzyme preparation removes long fibers on the surface of the fabric and improves the uniformity of the fleece. Finally, the post-treatment avoids the continuous action of the enzyme preparation on the fibers. The fabric prepared by the present application not only has the skin-friendly hand feeling of the fleece, but also improves the air permeability and moisture absorption performance, color fastness, removal rate of floating color, and the like. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a microscope magnified image of the fabric of Example 1.

[0017] Fig. 2 It is a microscope magnified image of the fabric of Example 1 after forming the fleece; wherein the indicated "Px treatment" has no special meaning.

[0018] Fig. 3 It is a microscope magnified image of the fabric of Example 1 after polishing treatment. DETAILED DESCRIPTION

[0019] The present application provides a modal blended fleece skin-friendly fabric and a preparation method thereof. In order to make the purpose, technical scheme and effect of the present application more clear and explicit, the present application is further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the protection scope of the present application.

[0020] The present application provides a preparation method of a modal blended fleece skin-friendly fabric, comprising the following steps: (1) Pretreatment (by removing oil and chelation, removing impurities such as oil, pulp, metal ions on the surface of the fabric, opening the fiber pores, laying the foundation for subsequent formation of nap, dyeing and other processes): adding fabric mixed with polyester and cotton in modal and first auxiliary (C12-C14 fatty alcohol polyoxyethylene ether and sodium dodecyl benzene sulfonate complex product, chelating agent: disodium ethylenediaminetetraacetate) into the dyeing vat. C12-C14 fatty alcohol polyoxyethylene ether is a non-ionic surfactant, which has good penetration and emulsification capacity. By penetrating the gap of the fiber, emulsifying oil, reducing surface tension, it helps to remove impurities on the surface of the fabric. Specifically, the amount of C12-C14 fatty alcohol polyoxyethylene ether is 2-3 g / L (based on the volume of the dyeing vat treatment liquid). Sodium dodecyl benzene sulfonate as an anionic surfactant has strong decontamination ability. By compounding with non-ionic surfactants, it further enhances the decontamination ability and prevents the redeposition and adsorption of the already stripped impurities on the surface of the fabric through the charge repulsion effect. Specifically, the amount of sodium dodecyl benzene sulfonate is 4-6 g / L (based on the volume of the dyeing vat treatment liquid). Disodium ethylenediaminetetraacetate as a chelating agent can chelate calcium, magnesium and other metal ions in water, avoid their reaction with surfactants to form precipitates, and improve the uniformity of oil removal. Specifically, the amount of disodium ethylenediaminetetraacetate is 0.5-1 g / L (based on the volume of the dyeing vat treatment liquid). More specifically, the mass ratio of C12-C14 fatty alcohol polyoxyethylene ether to sodium dodecyl benzene sulfonate is 1:(2-3). The surfactant molecules in the above proportion range form mixed micelles at the interface, which significantly improves the ability to reduce surface tension compared to single use. In addition, the anionic surfactant is strongly basic, and the non-ionic surfactant is neutral. The above proportion maintains the pH of the complex product solution at 8.5-9.5, avoiding hydrolytic damage to modal fibers caused by strong alkalinity. At the same time, if the anionic proportion is too high, excess sodium dodecyl benzene sulfonate will form multiple layers of adsorption on the surface of the fiber, resulting in soap stain residue and affecting the uniformity of subsequent dyeing.

[0021] The temperature is 70-80℃ and the treatment time is 10-15 minutes to remove impurities and oil on the surface of the fabric. The above temperature range can balance the activity of surfactants and energy consumption. At this temperature range, the emulsification efficiency is best below the cloud point of non-ionic surfactants, while avoiding damage to the fiber at high temperature. The above treatment time can ensure that the first auxiliary agent penetrates and completes the impurity stripping. If the time is too short, the oil removal is not complete, and if the time is too long, the energy consumption increases.

[0022] The ratio of fabric weight to liquid volume in the dyeing vat is 1:(8-12) kg / L. The concentration of the first auxiliary agent and the movement space of the fabric are controlled. If the liquid ratio is too low, the concentration of the first auxiliary agent is too high, which can easily cause fiber damage. If the liquid ratio is too high, the first auxiliary agent is not evenly dispersed.

[0023] (2) Forming fluff (using the action of organosiloxane on the surface of the fiber at high temperature, combined with the auxiliary diffusion of the penetrating agent, forming uniform and fine fluff on the surface of the fabric, giving the fabric a soft and fluffy touch. Organosiloxane mainly acts on modal fiber, polyester can assist the formation of fluff, but it is difficult to act on the surface of cotton fiber): Add 3-5 g / L (based on the volume of the dyeing bath) of organosiloxane to the dyeing bath, which includes one or both of hydroxyl silicone oil and amino silicone oil. In a high-temperature environment, hydroxyl silicone oil will penetrate the surface of modal fiber through thermal motion, and form hydrogen bonds by physical adsorption and the combination of silicon-oxygen bonds in hydroxyl silicone oil and the hydroxyl groups on the surface of modal fiber, etching and reforming the surface morphology of modal fiber, forming fine and uniform "peach fuzz" and "fluff" effect on the surface of modal fiber, and optimizing the smoothness of the fiber surface to some extent, preparing for subsequent dyeing and polishing processes. At the same time, when organosiloxane acts on modal fiber, it will change the overall structural tension of the blended fabric. Due to the blending and interweaving of modal and polyester, the surface changes of modal will cause the relative displacement and local bulging of polyester fibers, which will drive the adjustment of the morphology of polyester fibers on the surface of the fabric, and assist in achieving uniformity of "peach fuzz" effect. The amino group in amino silicone oil combines with the negative charge of modal fiber, and the active hydrogen in the amino group can undergo hydrogen transfer reaction with siloxane, increasing the crosslinking degree and softness, and the fluff is more erect, which is suitable for high-end skin-friendly fabrics, such as underwear and baby fabrics. When the two are used together, they can have both softness and crispness, and improve the fluff density.

[0024] Also add 0.5-1 g / L of C8-C10 fatty alcohol polyoxyethylene ether (penetrating agent) and polyethylene glycol with a molecular weight of 400 or 600 to the dyeing bath. C8-C10 fatty alcohol polyoxyethylene ether is used to reduce the surface tension of water, promote the penetration of organosiloxane and polyethylene glycol into the fiber, and avoid uneven finishing due to the tight structure of the fabric; it also works together with polyethylene glycol to emulsify organosiloxane into a stable emulsion, improving the uniformity of distribution. Polyethylene glycol is used to emulsify organosiloxane, adjust the film toughness, and improve the uniformity of the fluff. Polyethylene glycol with a molecular weight of 400 has a shorter chain segment, which enhances the fluidity of organosiloxane, promotes the rapid diffusion of organosiloxane to the surface layer of the fiber, and improves the fineness of the fluff. Polyethylene glycol with a molecular weight of 600 has a longer chain segment, which increases the flexibility and durability of the film and improves the anti-pilling performance.

[0025] The mass ratio of the organosiloxane and the polyethylene glycol is (3-5): 1. As described above, the organosiloxane is used to provide the basic framework of the pile, and the polyethylene glycol is added to embed in the network structure / framework to increase the flexibility of the film. In the above ratio range, the two molecules reach the best entanglement state, the elongation at break of the film is improved, and the touch is softer. When the content of the organosiloxane is too high, the film thickness is thick, the pile stiffness is good, but the air permeability of the fabric is reduced; when the content of the polyethylene glycol is too high, the film thickness is thin, the air permeability is improved, but the density of the pile is reduced.

[0026] The temperature of the dye vat is 100-120°C, and the treatment time is 50-60 minutes. High temperature causes the modal fiber to expand, and the mechanical stirring in the dye vat causes friction between the fibers, and the surface macromolecular chains are broken to form hair. In the film forming process of the organosiloxane on the fiber surface, the hair is oriented and arranged to form a fine and uniform pile layer. When the temperature is higher than 120°C and the treatment time is too long, the thermal degradation rate of the modal fiber increases, the fiber is damaged, part of the pile is broken, and the unevenness of the pile length increases.

[0027] (3) Dyeing the polyester in the blended fabric (realizing color uniformity and color fastness by the cooperation of disperse dyes and leveling agents): adding disperse dyes and 1-2 g / L of polyether modified silicone leveling agents to the dye vat. Disperse dyes are non-ionic dyes, which penetrate into the amorphous region of polyester fibers through molecular motion under high temperature and high pressure, and have strong binding force with polyester. The polyether modified silicone leveling agent is used to reduce the aggregation degree of disperse dyes, promote uniform dyeing, avoid color difference of polyester, and at the same time give the fiber a smooth hand feeling.

[0028] The ratio of the weight of the fabric to the volume of the liquid in the dye vat is controlled to be 1:(10-15) kg / L, which ensures the uniformity of the concentration of disperse dyes and avoids local high concentration of dyes leading to different color depths, and at the same time reduces the waste of dyes. The dyeing is carried out at a temperature of 130-135°C for 30-45 minutes. The glass transition temperature of polyester is above 70°C, and the molecular diffusion rate of disperse dyes is fast in the above dyeing temperature range, which can ensure the dyeing rate, and at the same time avoid exceeding the melting point of polyester. When the time is too short, the color is light, and when the time is too long, the color fastness is reduced due to the hydrolysis of dyes.

[0029] (4) Reduction Cleaning (This step is involved when dyeing dark colors, but not when dyeing light colors) (This step is used to remove residual floating dye after dyeing polyester, and to destroy the structure of unfixed dye through reduction reaction, thereby improving wash fastness): Add 2-4 g / L (based on the volume of dyeing solution) of sodium hexanediol and 1-2 g / L (based on the volume of dyeing solution) of sodium hydroxide to the dyeing vat, and control the pH of the dyeing solution to 10-11. Sodium hexanediol is a strong reducing agent, which reduces the floating dye to water-soluble substances under alkaline conditions, making it easier to clean. Sodium hydroxide is used to adjust the pH to 10-11, providing an alkaline environment for the reduction reaction and enhancing the stripping efficiency of sodium hexanediol. The ratio of the fabric weight to the liquid volume in the dyeing vat is 1:(10-15) kg / L, and dyeing is carried out for 20-25 minutes at a temperature of 75-80℃. Sodium hexanediol has stable reducing ability at this temperature, but it is easily decomposed and ineffective above 80℃, and its stripping efficiency decreases below 75℃. The above dyeing time ensures that the floating dye is fully reduced and dissolved. If the time is too short, the dye will not be completely removed, and if the time is too long, it will damage the fiber.

[0030] (5) Dyeing the cotton component in the blended fabric (dyeing the cotton component in the blended fabric, achieving color stability and skin-friendliness compatibility through the covalent bonding of reactive dyes with cellulose fibers): Add reactive dyes (such as vinyl sulfone groups, which form covalent bonds with the hydroxyl groups of cotton fibers, resulting in excellent color fastness) to the dyeing vat. The dyeing vat temperature is 60-65℃. First, add 10-20 g / L (based on the volume of the dyeing vat treatment liquid) of sodium chloride and dye for 20-30 minutes. Then, add 8-12 g / L (based on the volume of the dyeing vat treatment liquid) of sodium carbonate to adjust the pH value of the solution to 10-11 and dye for 30-40 minutes. Sodium chloride, as a dyeing accelerator, is added at the beginning of dyeing. By neutralizing the charge, it reduces the repulsive force between the dye and the fiber, promotes dye adsorption, and increases the dyeing rate. Sodium carbonate, as a fixing agent, is used to adjust the pH. It is added at the end of dyeing to promote the nucleophilic addition reaction between the dye and the fiber, thus completing the color fixation. Adding salt first and then alkali avoids premature hydrolysis of the dye under alkaline conditions and ensures that adsorption and fixation proceed in steps. A segmented dyeing process is adopted, with the salt addition stage promoting adsorption and the alkali addition stage completing the color fixation, ensuring that covalent bonds are fully formed during the total dyeing time.

[0031] (6) Polishing treatment (hydrolyzing long hairs on the fabric surface with neutral cellulase, retaining fine fibers, making the fabric smooth and soft to the touch, while improving anti-pilling properties): Add 0.5-1.0 g / L (based on the volume of the dye bath) of enzyme preparation (neutral cellulase) and citrate-sodium citrate buffer to adjust the pH of the solution to 6-7. Neutral cellulase can specifically hydrolyze the protruding hairs on the fiber surface, retaining the internal fiber structure and reducing the surface friction coefficient. Citrate-sodium citrate buffer is mainly used to maintain pH, ensuring the stable activity of neutral cellulase and avoiding enzyme inactivation. The polishing treatment temperature is 55-60℃, and the time is 50-60 minutes. If the temperature is too high, the enzyme will denature and become inactive; if the temperature is too low, the enzyme catalytic efficiency will be low. 50-60 minutes can fully hydrolyze long hairs and avoid excessive polishing that would cause the fabric to become thinner and the pile effect to deteriorate.

[0032] (7) Post-treatment (removing residual dyes and auxiliaries from the fabric surface, adjusting the pH to slightly acidic, and improving the fabric's skin-friendliness and wearing comfort): One of the following is used as a slightly acidic cleaning agent: fatty alcohol polyoxyethylene ether sulfate (1-2 g / L (based on the volume of the dye bath)) or citric acid derivatives (0.5-1 g / L (based on the volume of the dye bath)). Fatty alcohol polyoxyethylene ether sulfate can efficiently emulsify residual auxiliaries, is heat-resistant, and leaves little residue after washing. Citric acid derivatives have both cleaning and pH adjustment functions, are highly safe, and are suitable for skin-friendly fabrics. The fabric is washed at 95-100℃ for 10-15 minutes. The high temperature ensures complete dissolution of residual auxiliaries and inactivates residual enzymes after polishing, preventing further action during storage.

[0033] Traditional processes require sand washing machines to mechanically agitate the fibers, while this invention achieves the same level of napping simply by treating the fibers with organosiloxane auxiliaries in the dyeing vat, thus mimicking sand washing and reducing equipment investment. Pre-treatment removes grease and impurities, facilitating rapid and thorough penetration of the organosiloxane auxiliaries into the fibers. High temperatures cause the fibers to expand and etch their surface, creating a uniform nap. The introduction of enzymes further removes long fibers from the fabric surface, improving the uniformity of the nap. Finally, a post-treatment prevents the enzymes from further affecting the fibers.

[0034] This invention also provides a modal blended plush skin-friendly fabric, prepared using the same method. The nanoscale membrane structure formed by the compounding of organosiloxane and polyethylene glycol not only gives the fabric a plush, skin-friendly feel but also improves its breathability and moisture absorption. Polyester dyeing uses high-temperature disperse dyes and polyether-modified silicone leveling agents to ensure wash fastness and the removal rate of loose dye after reduction washing. Cotton component dyeing, through low-salt dyeing promotion and segmented pH control, improves the fixation rate of reactive dyes while minimizing fiber strength loss.

[0035] To further illustrate the modal blended plush skin-friendly fabric and its preparation method provided by the present invention, the following embodiments are provided.

[0036] Example 1 A method for preparing a modal blended plush, skin-friendly fabric includes the following steps: (1) Pretreatment: Add a fabric blended with polyester and cotton in modal, 2 g / L of a compound product of C12-C14 fatty alcohol polyoxyethylene ether and sodium dodecylbenzenesulfonate, and 0.5 g / L of disodium ethylenediaminetetraacetate to the dyeing vat, and carry out the treatment at a temperature of 80°C for 10 minutes. The ratio of the weight of the fabric to the volume of the liquid in the dyeing vat is 1:12. The mass ratio of the C12-C14 fatty alcohol polyoxyethylene ether to the sodium dodecylbenzenesulfonate is 1:2.5.

[0037] (2) Formation of fluff: Add 5 g / L of organosiloxane (hydroxyl silicone oil), 0.5 g / L of C8-C10 fatty alcohol polyoxyethylene ether, and polyethylene glycol with a molecular weight of 600 to the dyeing vat. The temperature of the dyeing vat is 110°C, and the treatment time is 60 minutes. The mass ratio of the organosiloxane to the polyethylene glycol is 3.5:1.

[0038] (3) Dyeing the polyester in the blended fabric: Add disperse dye and 1 g / L of polyether modified silicone leveling agent to the dyeing vat. The ratio of the fabric weight to the liquid volume in the dyeing vat is 1:12. Dye for 40 minutes at a temperature of 130°C.

[0039] (4) Reduction cleaning: Add 3 g / L sodium hexadisulfite and 1 g / L sodium hydroxide to the dyeing vat, and control the pH value of the dyeing vat solution to 10-11. The ratio of the weight of the fabric to the volume of the liquid in the dyeing vat is 1:13, and dyeing is carried out for 20 minutes at a temperature of 80℃.

[0040] (5) Dyeing cotton in blended fabrics: Add reactive dye to the dyeing vat. The dyeing vat temperature is 60℃. First, add 15g / L sodium chloride and dye for 25 minutes. Then add 10g / L sodium carbonate to adjust the pH of the solution to 10-11 and dye for 30 minutes.

[0041] (6) Polishing treatment: Add 0.5 g / L of neutral cellulase and citrate-sodium citrate buffer to adjust the pH of the solution to 6-7. The polishing treatment temperature is 58℃ and the time is 60 minutes.

[0042] (7) Post-treatment: The fabric was cleaned with 2 g / L fatty alcohol polyoxyethylene ether sulfate at 95°C for 10 minutes.

[0043] Example 2 A method for preparing a modal blended plush, skin-friendly fabric includes the following steps: (1) Pretreatment: Add a fabric blended with polyester and cotton in modal, 2.5 g / L of a compound product of C12-C14 fatty alcohol polyoxyethylene ether and sodium dodecylbenzenesulfonate, and 1 g / L of disodium ethylenediaminetetraacetate to the dyeing vat, and carry out the treatment at a temperature of 70°C for 15 minutes. The ratio of the weight of the fabric to the volume of the liquid in the dyeing vat is 1:10. The mass ratio of the C12-C14 fatty alcohol polyoxyethylene ether to the sodium dodecylbenzenesulfonate is 1:2.

[0044] (2) Formation of fluff: Add 4 g / L of organosiloxane (amino silicone oil), 0.5 g / L of C8-C10 fatty alcohol polyoxyethylene ether, and polyethylene glycol with a molecular weight of 400 to the dyeing vat. The temperature of the dyeing vat is 120°C, and the treatment time is 50 minutes. The mass ratio of the organosiloxane to the polyethylene glycol is 5:1.

[0045] (3) Polishing treatment: Add 0.5 g / L of neutral cellulase and citrate-sodium citrate buffer to adjust the pH of the solution to 6-7. The polishing treatment temperature is 60℃ and the time is 50 minutes.

[0046] (4) Post-treatment: The fabric was cleaned with 1 g / L fatty alcohol polyoxyethylene ether sulfate at 100°C for 10 minutes.

[0047] Example 3 A method for preparing a modal blended plush, skin-friendly fabric includes the following steps: (1) Pretreatment: Add a fabric blended with polyester and cotton in modal, 3 g / L of a compound product of C12-C14 fatty alcohol polyoxyethylene ether and sodium dodecylbenzenesulfonate, and 1 g / L of disodium ethylenediaminetetraacetate to the dyeing vat, and carry out the treatment at a temperature of 75°C for 13 minutes. The ratio of the weight of the fabric to the volume of the liquid in the dyeing vat is 1:8. The mass ratio of the C12-C14 fatty alcohol polyoxyethylene ether to the sodium dodecylbenzenesulfonate is 1:3.

[0048] (2) Formation of fluff: Add 3 g / L of organosiloxane (1.5 g / L of hydroxyl silicone oil and 1.5 g / L of amino silicone oil), 1 g / L of C8-C10 fatty alcohol polyoxyethylene ether, and polyethylene glycol with a molecular weight of 600 to the dyeing vat. The temperature of the dyeing vat is 100°C, and the treatment time is 55 minutes. The mass ratio of the organosiloxane (hydroxyl silicone oil and amino silicone oil in a ratio of 1:1) to the polyethylene glycol is 4:1.

[0049] (3) Dyeing the polyester in the blended fabric: Add disperse dye and 2 g / L of polyether modified silicone leveling agent to the dyeing vat. The ratio of the fabric weight to the liquid volume in the dyeing vat is 1:15. Dye for 35 minutes at a temperature of 135°C.

[0050] (4) Dyeing cotton in blended fabrics: Add reactive dye to the dyeing vat. The temperature of the dyeing vat is 65℃. First, add 12g / L sodium chloride and dye for 20 minutes. Then add 8g / L sodium carbonate to adjust the pH of the solution to 10-11 and dye for 35 minutes.

[0051] (5) Polishing treatment: Add 1.0 g / L of neutral cellulase and citrate-sodium citrate buffer to adjust the pH of the solution to 6-7. The polishing treatment temperature is 55℃ and the time is 60 minutes.

[0052] (6) Post-treatment: The fabric was cleaned at 95°C for 15 minutes using 0.5 g / L of citric acid derivative.

[0053] Comparative Example 1 The preparation method of Comparative Example 1 is basically the same as that of Example 1, except that no chelating agent is added in the pretreatment step.

[0054] Comparative Example 2 The preparation method of Comparative Example 2 is basically the same as that of Example 1, except that polyethylene glycol is not added in the fluffing step.

[0055] Comparative Example 3 The preparation method of Comparative Example 3 is basically the same as that of Example 1, except that in the step of forming fluff, the mass ratio of the organosiloxane and the polyethylene glycol is 1:1.

[0056] The following performance tests were conducted on each embodiment and each comparative example:

[0057] Example 1 uses hydroxyl silicone oil and PEG-600 to form a flexible film structure, which has good air permeability, high wash fastness, and high dye fixation rate. From Figs. 1-3 It can be seen that after the fabric is treated with hydroxyl silicone oil, PEG-600 and penetrant, more hairs are formed on the surface of the fiber. After being treated with enzyme preparation, the long hairs break and the number of short hairs increases, forming more uniform "fluff" and "peach hair".

[0058] Example 2 exhibits the best MIU performance, but due to the high film density of the amino silicone oil, the air permeability of Example 2 is slightly lower than that of other examples.

[0059] Example 3 uses a combination of hydroxyl silicone oil and amino silicone oil, which has the strongest interfacial bonding force, the best bursting strength, improved moisture absorption and evaporation rate, and the best wash fastness (color fastness).

[0060] In Comparative Example 1, no chelating agent was added during the pretreatment stage, causing calcium and magnesium ions in the water to precipitate with the surfactant, resulting in localized hydrolytic damage to the fibers and reducing their mechanical properties. Simultaneously, residual metal ions hindered the formation of covalent bonds between the dye and the fiber, reducing wash fastness. Unchelated metal ions combined with impurities, clogging fiber pores and affecting air permeability.

[0061] In Comparative Example 2, the absence of polyethylene glycol in the fluff formation step resulted in poor emulsification of the organosiloxane, uneven film formation, and increased fluff shedding rate after washing. Silicone oil agglomeration led to uneven dye adsorption, increased residual floating color, and reduced wet rubbing fastness. The lack of polyethylene glycol to adjust the film's flexibility resulted in a hard and brittle siloxane film, and an increase in the surface friction coefficient of the fibers.

[0062] In Comparative Example 3, the addition of excessive polyethylene glycol disrupted the siloxane crosslinking network, resulting in a loose membrane structure, pore collapse, and reduced air permeability. The membrane's stability was insufficient, making it easy for dye molecules to migrate and significantly increasing the degree of color fastness degradation. Moreover, the membrane's strength was insufficient, leading to a decrease in inter-fiber bonding and affecting mechanical properties.

[0063] It is understood that those skilled in the art can make equivalent substitutions or changes to the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A method for preparing a modal blended plush, skin-friendly fabric, characterized in that, Includes the following steps: Pretreatment: Add a fabric blended with polyester and cotton in modal and the first auxiliary agent to the dyeing vat to remove impurities and grease from the fabric surface. To form a fluffy effect: add organosiloxanes to the dyeing vat, the organosiloxanes including one or two of hydroxy silicone oil and amino silicone oil, and the temperature of the dyeing vat is 100-120°C to form a fluffy effect on the surface of the fabric. Polishing treatment: Add enzyme preparations to remove long hairs from the fabric surface; Post-treatment: Clean the fabric.

2. The method for preparing the modal blended plush skin-friendly fabric according to claim 1, characterized in that, The ratio of the fabric weight to the liquid volume in the dyeing vat is 1: (8-12) kg / L; the first auxiliary agent includes a compound product of C12-C14 fatty alcohol polyoxyethylene ether and sodium dodecylbenzene sulfonate; the mass ratio of the C12-C14 fatty alcohol polyoxyethylene ether to the sodium dodecylbenzene sulfonate is 1: (2-3).

3. The method for preparing the modal blended plush skin-friendly fabric according to claim 2, characterized in that, In the pretreatment step, disodium ethylenediaminetetraacetate is added to the dyeing vat; the temperature of the pretreatment is 70-80°C, and the treatment time is 10-15 minutes.

4. The method for preparing the modal blended plush skin-friendly fabric according to claim 1, characterized in that, In the step of forming fluff, 0.5-1 g / L of C8-C10 fatty alcohol polyoxyethylene ether and polyethylene glycol with a molecular weight of 400 or 600 are added to the dyeing vat, and the mass ratio of the organosiloxane to the polyethylene glycol is (3-5):

1.

5. The method for preparing the modal blended plush skin-friendly fabric according to claim 4, characterized in that, In the step of forming the pile, the fabric is heated for 50 to 60 minutes.

6. The method for preparing the modal blended plush skin-friendly fabric according to claim 1, characterized in that, Between the step of forming the pile and the polishing treatment, there is also a step of dyeing the polyester in the blended fabric, specifically: adding disperse dye and 1-2 g / L of polyether modified silicone leveling agent to the dyeing vat, controlling the ratio of the fabric weight to the liquid volume in the dyeing vat to be 1:(10-15) kg / L; dyeing for 30-45 minutes at a temperature of 130-135℃; Alternatively, the process may include a dyeing and reduction cleaning step for the polyester in the blended fabric between the fluffing step and the polishing treatment. The dyeing step for the polyester is as follows: add disperse dye and 1-2 g / L of polyether-modified silicone leveling agent to the dyeing vat, and control the ratio of the fabric weight to the liquid volume in the dyeing vat to be 1:(10-15) kg / L; dye for 30-45 minutes at a temperature of 130-135℃. The reduction cleaning step is as follows: add sodium hexadisulfite and sodium hydroxide to the dyeing vat, control the pH value of the dyeing vat solution to be 10-11, and control the ratio of the fabric weight to the liquid volume in the dyeing vat to be 1:(10-15) kg / L; dye for 20-25 minutes at a temperature of 75-80℃.

7. The method for preparing the modal blended plush skin-friendly fabric according to claim 1, characterized in that, Between the fluff-forming step and the polishing treatment, there is also a step of dyeing the cotton in the blended fabric. Reactive dye is added to the dyeing vat, the vat temperature is 60-65°C, sodium chloride is added first for dyeing for 20-30 minutes, and then sodium carbonate is added to adjust the pH of the solution to 10-11 and dye for 30-40 minutes.

8. The method for preparing the modal blended plush skin-friendly fabric according to claim 1, characterized in that, In the polishing step, the enzyme preparation is neutral cellulase; a citrate-sodium citrate buffer solution is also added to adjust the pH of the solution to 6-7; the polishing temperature is 55-60℃ and the time is 50-60 minutes.

9. The method for preparing the modal blended plush skin-friendly fabric according to claim 1, characterized in that, In the post-treatment step, one of fatty alcohol polyoxyethylene ether sulfate and citric acid derivatives is used as a weak acidic cleaning agent, and the post-treatment is carried out at 95-100°C for 10-15 minutes.

10. A modal blended plush, skin-friendly fabric, characterized in that, It is prepared by the method of any one of claims 1-9 for making modal blend plush skin-friendly fabric.

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