Micro-fuzzy lyocell fabric for home textiles, production method thereof and textile

Abstract

This invention provides a micro-fluffy lyocell fabric for home textiles, its production method, and the textile product. The production method of this micro-fluffy lyocell fabric includes: sequentially treating the greige fabric with the following processes: alkali desizing, flat-width washing, loose gradient acid opening, flat-dyeing, loose enzyme polishing, sizing and setting, pre-shrinking, and air beating to obtain the micro-fluffy lyocell fabric for home textiles; the loose gradient acid opening process includes: sequentially placing the flat-width washed greige fabric into two opening solutions containing organic acid, an anti-abrasion agent, and an opening agent for opening treatment, followed by washing the greige fabric. The concentration of organic acid in opening solution one is greater than that in opening solution two. During the opening process, the air volume is 800 m³ / h–1000 m³ / h, the water volume is 120 L / min–150 L / min, and the machine speed is 5 m / min–10 m / min. This invention can solve the problems of strong cooling sensation and seasonal limitations of lyocell fabrics.

Description

Technical Field

[0001] This invention relates to the field of textile technology, and in particular to a micro-fluffy Lyocell fabric for home textiles, its production method, and the textile product thereof. Background Technology

[0002] As consumers increasingly demand comfort, functionality, and all-season suitability for home textile products, regenerated cellulose fibers such as lyocell, which combine excellent moisture absorption, softness, and environmental friendliness, have been widely used in bedding fabrics. High-count, high-density weaving processes give lyocell fabrics a beautiful luster and drape, making them widely popular with consumers.

[0003] However, Lyocell fabric has the following drawbacks: Lyocell fibers have a dense cross-sectional structure, a smooth surface, and a high thermal conductivity, allowing them to quickly conduct heat upon contact with the human body, exhibiting high thermal conductivity (i.e., high Q). max Lyocell fabric has a cooling effect, producing a noticeable "cool sensation upon contact." This characteristic provides a cooling feeling during spring and summer, but can easily cause discomfort and affect comfort during autumn and winter, limiting its application in autumn and winter bedding and demonstrating a clear seasonal limitation. To alleviate the cooling sensation and give the fabric a soft and fluffy feel, finishing processes such as napping are usually used to treat Lyocell fabric. However, processing fabrics containing lyocell fibers using mechanical finishing processes such as napping has the following drawbacks: On the one hand, the nap structure formed during the napping process is mainly composed of single fibers or microfiber bundles, which lack an effective structural locking and interface reinforcement mechanism with the matrix, resulting in low overall bonding strength of the nap layer. This makes it prone to shedding and structural instability during subsequent use and washing, making it difficult to meet high durability requirements. On the other hand, lyocell fibers are prone to non-uniform fibrillation under wet friction conditions. This process is affected by the coupling effect of multiple factors and lacks effective control methods, resulting in uneven distribution of surface microstructure, which in turn causes problems such as color difference and uneven gloss, especially in medium and dark-colored fabrics, which seriously restricts the appearance quality of the product.

[0004] In addition, existing processes are unable to achieve an effective balance between "fleece construction" and "structural stability". Under multiple washing and drying cycles, the fleece layer is prone to continuous degradation, which manifests as a decrease in fluffiness, deterioration of hand feel and reduction in thermal and humid comfort, making it difficult to meet the requirements of high-end home textile products for long-term performance. Meanwhile, the sanding process is affected by many factors such as equipment parameters, material condition and environmental conditions. The process window is narrow, and it is difficult to control the stability and consistency. It is easy to cause local over-sanding or uneven surface, which restricts the quality stability of large-scale production.

[0005] Therefore, there is an urgent need for a technical solution to address the problems of Lyocell fabrics, such as strong cooling sensation, seasonal limitations, severe shedding from brushed solutions, easy abrasion during wide-width processing of home textiles, and uncontrollable fibrillation. Summary of the Invention

[0006] This invention provides a micro-fleece-feel lyocell fabric for home textiles, its production method, and the textile product, in order to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: After analyzing the relevant technical problems in the background technology, the inventors discovered that during the processing of fabrics containing lyocell fibers using mechanical finishing processes such as napping, the surface fibers of the fabric undergo directional pulling and breakage under the combined shearing and stretching action of abrasive particles, forming a pile structure mainly composed of single fibers or microfiber bundles. However, this type of pile mainly relies on the local embedding effect at the fiber roots and limited fiber entanglement force to bond with the matrix, resulting in low interfacial bonding strength. During subsequent use and washing, under repeated friction, water flow impact, and washing and drying cycles, the pile is prone to shedding, flattening, and loosening, leading to poor stability and insufficient durability of the fabric surface pile layer.

[0008] For fabrics containing lyocell fibers, during napping and subsequent wet finishing processes, the fibers are prone to non-uniform fibrillation under the combined effects of mechanical friction and moisture. This process has the following characteristics: The fibrillation initiation point is random, and the development rate is affected by local stress, humidity, and structural differences, making macroscopic uniform control difficult. This leads to uneven distribution of surface microfibers, differences in light scattering that easily produce noticeable color differences (whitening, haziness), and decreased appearance uniformity, especially for medium and dark colors, severely impacting the visual quality and consistency of high-end fabrics. The napped layer formed by the brushing process has a weakly bonded surface structure, which, during repeated washing and drying cycles: The continuous shedding of lint reduces the thickness of the pile layer, and the surface structure changes from "lint covering" to "base fabric exposure," destroying the original air layer structure. This manifests as: decreased fluffiness, reduced softness, a change from smooth to dry hand feel, and decreased thermal and moisture comfort, especially under washing and drying conditions (high temperature + tumbling mechanical action), these problems are significantly amplified.

[0009] In summary, existing finishing processes such as napping have problems with lyocell fabrics, including weak nap bonding, easy shedding, uncontrollable fibrillation leading to uneven appearance, poor nap durability, and significant performance degradation after washing. In addition, the process stability is insufficient, making it difficult to balance the nap effect with long-term performance.

[0010] To address the technical challenges of napping processes, existing technologies typically introduce resin finishing after napping to suppress uneven fibrillation during use. However, the control window for resin dosage is extremely narrow: too low a dosage fails to effectively suppress fibrillation, while too high a dosage can lead to a stiffer, more brittle feel and further increase the risk of pile shedding. Meanwhile, existing apparel fabrics generally employ overflow dyeing processes, which can achieve relatively thorough and uniform fibrillation through strong mechanical action; however, home textile fabrics, due to their wider width (245cm-275cm), typically utilize continuous long-run processing, which involves relatively gentle mechanical action and struggles to achieve sufficient fiber opening, resulting in inadequate fiber opening. During weaving and finishing, lyocell fibers are prone to stress concentration areas at the edges of the fabric width due to uneven tension distribution and wet swelling effects. In subsequent fiber opening treatments (such as alkaline fiber opening), the fiber surface structure is degraded to some extent, making it more susceptible to defects such as abrasions and holes, reducing overall process controllability, and leading to unstable fabric quality. If an overflow cylinder is used directly to process wide-width fabrics, the excessive mechanical force can easily cause severe abrasions to the fabric surface. Therefore, in wide-width lyocell home textile fabrics, achieving uniform and controllable fibrillation while avoiding abrasions has become a key technical challenge in the current process.

[0011] To address the aforementioned technical problems, this invention provides a method for producing a micro-fluffy Lyocell fabric for home textiles, comprising the following steps: The greige fabric is subjected to the following sequential treatments: alkali desizing, open-width washing, loose gradient acid fiber opening, flat dyeing, loose enzyme polishing, sizing and setting, pre-shrinking, and air beating to obtain the micro-fleece Lyocell fabric for home textiles; the greige fabric contains Lyocell fibers, and the mass percentage of Lyocell fibers in the greige fabric is greater than or equal to 50%; The loose gradient acid fiber opening process includes: placing the washed fabric in two separate fiber opening solutions containing organic acid, anti-abrasion agent, and fiber opening agent for fiber opening treatment; followed by washing the fabric; wherein the concentration of organic acid in the first fiber opening solution is greater than that in the second fiber opening solution; during the fiber opening process, the air volume is 800 m³ / h-1000 m³ / h, preferably 850 m³ / h-1000 m³ / h; the water volume is 120 L / min-150 L / min, preferably 135 L / min-150 L / min; and the machine speed is 5 m / min-10 m / min, preferably 5 m / min-8 m / min.

[0012] Optionally, the alkaline desizing includes: impregnating the fabric with a desizing solution containing inorganic alkali, penetrant and desizing agent, and then rolling and stacking the fabric under sealed tension-free conditions.

[0013] Optionally, the inorganic base is selected from sodium hydroxide or potassium hydroxide or a combination of both.

[0014] Optionally, the concentration of inorganic alkali in the desizing solution is 8 g / L-15 g / L, preferably 10 g / L-15 g / L.

[0015] Optionally, the concentration of the penetrant in the desizing solution is 2 g / L-3 g / L, preferably 2.5 g / L-3 g / L.

[0016] Optionally, the concentration of the desizing agent in the desizing solution is 1g / L-2g / L, preferably 1.5g / L-2g / L.

[0017] Optionally, the temperature of the desizing solution is 20℃-30℃, preferably 25℃-30℃.

[0018] Optionally, during the impregnation process, the machine speed is 27m / min-54m / min, preferably 30m / min-45m / min.

[0019] Optionally, the flat-width washing includes washing the greige fabric 3 to 4 times.

[0020] Optionally, the pH of the fiber-opening solution is 3.0-3.5, preferably 3.3-3.5.

[0021] Optionally, the temperature of the fiber-opening liquid is 50℃-60℃, preferably 55℃-60℃.

[0022] Optionally, the concentration of organic acid in the fiber-opening solution is 5 g / L-8 g / L, preferably 6 g / L-8 g / L.

[0023] Optionally, in the fiber-opening liquid, the concentration of the anti-abrasion agent is 2g / L-3g / L, preferably 2.5g / L-3g / L.

[0024] Optionally, in the first fiber-opening solution, the concentration of the fiber-opening agent is 1g / L-1.5g / L, preferably 1.2g / L-1.5g / L.

[0025] Optionally, the organic acid includes citric acid or oxalic acid or a combination of both.

[0026] Optionally, the pH of the second fiber-opening solution is 2.5-3.0, preferably 2.8-3.0.

[0027] Optionally, the temperature of the second fiber-opening liquid is 70℃-80℃, preferably 75℃-80℃.

[0028] Optionally, the concentration of organic acid in the second fiber-opening solution is 3g / L-5g / L, preferably 4g / L-5g / L.

[0029] Optionally, the concentration of the anti-abrasion agent in the second fiber-opening liquid is 2g / L-3g / L, preferably 2.5g / L-3g / L.

[0030] Optionally, in the second fiber-opening liquid, the concentration of the fiber-opening agent is 1.5 g / L-2 g / L, preferably 1.8 g / L-2 g / L.

[0031] Optionally, the fiber opening process can be performed under loose, tension-free conditions.

[0032] Optionally, the time for each fiber opening process is 30-40 minutes, preferably 35-40 minutes.

[0033] Optionally, the washing temperature after fiber opening is 60℃-70℃, preferably 65℃-70℃.

[0034] Optionally, the loose-type enzyme polishing includes: polishing the greige fabric after flat dyeing with an enzyme treatment solution of pH 6.0-6.5, heating to 85℃-90℃ and adjusting the pH to 8.5-9.0, and maintaining the temperature; preferably, polishing the greige fabric after flat dyeing with an enzyme treatment solution of pH 6.2-6.5, heating to 88℃-90℃ and adjusting the pH to 8.8-9.0, and maintaining the temperature; then washing the greige fabric with water, wherein the enzyme treatment solution includes neutral cellulase, xylanase and an anti-abrasion agent.

[0035] Optionally, the concentration of neutral cellulase in the enzyme treatment solution is 6 g / L-8 g / L, preferably 7 g / L-8 g / L.

[0036] Optionally, the concentration of xylanase in the enzyme treatment solution is 2 g / L-3 g / L, preferably 2.5 g / L-3 g / L.

[0037] Optionally, the concentration of the anti-abrasion agent in the enzyme treatment solution is 2 g / L-3 g / L, preferably 2.5 g / L-3 g / L.

[0038] Optionally, the temperature of the enzyme treatment solution is 45℃-50℃, preferably 48℃-50℃.

[0039] Optionally, the polishing process takes 35-40 minutes, preferably 38-40 minutes.

[0040] Optionally, the circulation flow rate of the enzyme treatment solution is 50 L / min-60 L / min, preferably 55 L / min-60 L / min.

[0041] Alternatively, polishing can be performed under loose, tension-free conditions.

[0042] Optionally, during the polishing process, the air volume is 800m³ / h-1000m³ / h, preferably 850m³ / h-1000m³ / h; the water volume is 120L / min-150L / min, preferably 135L / min-150L / min; and the vehicle speed is 5m / min-10m / min, preferably 5m / min-8m / min.

[0043] Optionally, the temperature is increased to 85℃-90℃ at a rate of 2℃ / min-3℃ / min, and preferably, the temperature is increased to 88℃-90℃ at a rate of 2.5℃ / min-3℃ / min.

[0044] Optionally, the pre-shrinking includes: pre-shrinking the sized and shaped fabric at a temperature of 95℃-105℃, a pressure of 0.3MPa-0.4MPa, and a machine speed of 20m / min-30m / min. Preferably, the pre-shrinking treatment is performed on the sized and shaped fabric at a temperature of 100℃-105℃, a pressure of 0.35MPa-0.4MPa, and a machine speed of 25m / min-30m / min.

[0045] Optionally, the air beating includes: air beating the pre-shrunken fabric for 5s-8s under conditions of a vehicle speed of 30m / min-40m / min, a temperature of 120℃-130℃, and an air pressure of 0.1MPa-0.2MPa; preferably, air beating the pre-shrunken fabric for 6s-8s under conditions of a vehicle speed of 35m / min-40m / min, a temperature of 125℃-130℃, and an air pressure of 0.15MPa-0.2MPa.

[0046] The present invention also provides a micro-fluffy Lyocell fabric for home textiles prepared according to the method described above.

[0047] The present invention also provides a textile, which includes the micro-fluffy Lyocell fabric for home textiles as described above.

[0048] The beneficial effects of this invention are: In this invention, alkaline desizing enables the lyocell fibers to fully swell and the fabric to desizing, laying the foundation for subsequent fiber opening. Flat-width washing removes residual inorganic alkali and sizing agents, regulating the acid-base environment of the fabric and providing suitable conditions for subsequent fiber opening. Furthermore, flat-width washing under tension-free and low-mechanical-disturbance conditions avoids localized friction and stress concentration in the swollen state of the fabric, thus preventing fiber abrasion. Loose gradient acid opening enables stepwise and directional controllable microfibrillation of the lyocell fiber surface, laying the core foundation for the formation of the microfibril layer. Loose flat-dyeing avoids damage to the already formed microfibril layer. It balances the uniform dyeing effect with the stability of the microfiber layer structure; the loose enzyme polishing treatment can achieve the shaping and optimization of the microfiber layer through selective degradation of enzymes, remove messy floating fibers, and make the pile more delicate and uniform; the sizing and stretching treatment can improve the surface smoothness of the fabric, avoid damage to the pile during stretching, and balance the drape of the fabric and the stability of the microfiber layer; the pre-shrinking treatment can eliminate the internal stress of the fabric, prevent the fabric from shrinking and deforming during subsequent use, and further improve the fluffiness of the microfiber layer; the air beating can comb the microfiber layer, making the pile distribution more uniform and fluffy, improving the fineness and skin-friendliness of the pile, while removing surface dust.

[0049] In this invention, after the first stage of fiber opening treatment, the fabric undergoes slight swelling. During the second stage of fiber opening, a large volume of air and water is used to form a uniform and stable gas-liquid flow, promoting uniform splitting of the fiber surface layer (i.e., the process of directional fibrillation). Simultaneously, it avoids microfibril aggregation and excessive shedding. Furthermore, the low machine speed prevents excessive mechanical force from damaging the fibers. Subsequent washing removes residual acid and floating fibers from the fabric surface, preserving the microfibril layer firmly bonded to the fiber matrix.

[0050] In this invention, the concentration of organic acid in the first fiber-opening solution is greater than that in the second fiber-opening solution, which can break the dense structure of the surface layer of Lyocell fiber, thereby further finely regulating and homogenizing the microfiber structure.

[0051] In this invention, acid is used instead of alkali for fiber splitting treatment. This achieves moderate swelling and structural activation of the fiber surface while avoiding severe erosion and damage to the fiber surface caused by the alkaline system. Under the action of the gas-liquid flow field, the force is uniformly transmitted, thereby reducing local stress concentration and minimizing defects such as scratches and holes during processing. The gradient method of acid splitting treatment, rather than a one-step method, allows the fiber surface to gradually transition from low-intensity activation to a directional splitting state, achieving gradual fibrillation and avoiding local over-fibrillation and fibrillation runaway problems caused by instantaneous strong action. This improves the uniformity and controllability of the microfibril structure.

[0052] In summary, this invention addresses the technical challenges of wide-width lyocell home textile fabrics, low mechanical action in processing equipment, easy abrasion after fiber swelling, and poor controllability of microfibrillation. It combines alkali desizing, flat-width washing, loose gradient acid opening, flat dyeing, loose enzyme polishing, sizing and setting, pre-shrinking, and air beating to construct a manufacturing process for micro-fluffy lyocell fabrics for home textiles. By increasing air and water volume and operating at low speed, the mechanical action intensity is enhanced. The use of anti-abrasion agents prevents abrasion on the fabric. The loose, tension-free opening process creates a uniform, stable, and abrasion-free microfluffy layer on the fabric surface, reducing the cold feel of lyocell fabrics. This solves problems such as high shedding rate, insufficient fibrillation, easy abrasion of the fluff during processing, and poor fluff stability caused by the napping process. This process is suitable for wide-width home textile fabric production, has strong universality, and is easy to industrialize. Attached Figure Description

[0053] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0054] In the attached diagram: Figure 1 The images are electron microscope images of the Lyocell fabrics obtained in Example 1 and Comparative Example 9 (i.e., the brushing process) of the present invention, wherein 1A is an electron microscope image of the Lyocell fabrics obtained in Example 1 of the present invention, and 1B is an electron microscope image of the Lyocell fabrics obtained in Comparative Example 9. Figure 2 The images shown are electron microscope (EM) images of the surface of the Lyocell fabric obtained in Example 1 and Comparative Example 9 of the present invention, wherein 2A is an EEM image of the Lyocell fabric obtained in Example 1 of the present invention, and 2B is an EEM image of the surface of the Lyocell fabric obtained in Comparative Example 9. Figure 3 These are morphological diagrams of the pile layer of the Lyocell fabric obtained in Embodiment 1 and Comparative Example 9 of the present invention, wherein 3A is a morphological diagram of the pile layer of the Lyocell fabric obtained in Embodiment 1 of the present invention, and 3B is a morphological diagram of the pile layer of the Lyocell fabric obtained in Comparative Example 9. Figure 4 These are sample photos for the different levels in the hair removal grade test. Detailed Implementation

[0055] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] One embodiment of the present invention provides a method for producing a micro-fluffy Lyocell fabric for home textiles, comprising the following steps: The greige fabric is subjected to the following treatments in sequence: alkali desizing, open-width washing, loose gradient acid fiber opening, flat dyeing, loose enzyme polishing, sizing and setting, pre-shrinking, and air beating to obtain a micro-fleece Lyocell fabric for home textiles; the greige fabric contains Lyocell fibers, and the mass percentage of Lyocell fibers in the greige fabric is greater than or equal to 50%; The loose gradient acid fiber opening process includes: placing the washed greige fabric in two separate fiber opening solutions containing organic acid, anti-abrasion agent, and fiber opening agent for fiber opening treatment, followed by washing the greige fabric. The concentration of organic acid in the first fiber opening solution is greater than that in the second fiber opening solution. During the fiber opening process, the air volume is 800 m³ / h-1000 m³ / h, preferably 850 m³ / h-1000 m³ / h; the water volume is 120 L / min-150 L / min, preferably 135 L / min-150 L / min; and the machine speed is 5 m / min-10 m / min, preferably 5 m / min-8 m / min.

[0057] It should be noted that in this invention, the greige fabric can be a pure Lyocell fiber fabric, or a fabric made of Lyocell fiber blended or interwoven with other fibers.

[0058] In this invention, alkaline desizing enables the lyocell fibers to fully swell and the fabric to desizing, laying the foundation for subsequent fiber opening. Flat-width washing removes residual inorganic alkali and sizing agents, regulating the acid-base environment of the fabric and providing suitable conditions for subsequent fiber opening. Furthermore, flat-width washing under tension-free and low-mechanical-disturbance conditions avoids localized friction and stress concentration in the swollen state of the fabric, thus preventing fiber abrasion. Loose gradient acid opening enables stepwise and directional controllable microfibrillation of the lyocell fiber surface, laying the core foundation for the formation of the microfibril layer. Flat-dyeing avoids damage to the already formed microfibril layer, thus… It balances the uniform dyeing effect with the stability of the microfiber layer structure; the loose enzyme polishing treatment can achieve the shaping and optimization of the microfiber layer through selective degradation of enzymes, remove messy floating fibers, and make the pile more delicate and uniform; the sizing and stretching treatment can improve the surface smoothness of the fabric, avoid damage to the pile during stretching, and balance the drape of the fabric and the stability of the microfiber layer; the pre-shrinking treatment can eliminate the internal stress of the fabric, prevent the fabric from shrinking and deforming during subsequent use, and further improve the fluffiness of the microfiber layer; the air beating can comb the microfiber layer, making the pile distribution more uniform and fluffy, improving the fineness and skin-friendliness of the pile, while removing surface dust.

[0059] In this invention, after the first stage of fiber opening treatment, the fabric undergoes slight swelling. During the second stage of fiber opening, a large volume of air and water is used to form a uniform gas-liquid flow, promoting uniform fiber separation on the surface (i.e., the process of directional fibril extrusion), while preventing microfibril aggregation and excessive shedding. Furthermore, the low machine speed avoids excessive mechanical force that could damage the fibers. Subsequent washing removes residual acid and floating fibers from the fabric surface, preserving the microfibril layer firmly bonded to the fiber matrix. Specifically, this invention, by controlling the airflow and water flow during the loose gradient acid fiber opening process (airflow of 800m³ / h-1000m³ / h and water flow of 120L / min-150L / min), can overcome the deficiency of existing home textile equipment that cannot open fibers when the mechanical force is low. Furthermore, by utilizing a larger airflow and water flow to form a uniform and stable gas-liquid flow, it promotes uniform splitting of the fiber surface (i.e., the process of directional fibrillation), while also preventing microfibrillation aggregation and excessive shedding. By reducing the machine speed to 5m / min-10m / min during the loose gradient acid fiber opening process, it avoids the technical problem of fabric damage caused by excessive speed. Thus, without damaging the fabric or reducing the fiber's mechanical strength, it improves anti-shedding performance. In other words, by reducing the machine speed to 5m / min-10m / min during the loose gradient acid fiber opening process, it avoids damage to the fibers caused by excessive mechanical force through low speed. Subsequent washing can remove residual acid and loose fibers from the surface of the fabric, while retaining the microfiber layer that is firmly bonded to the fiber matrix.

[0060] In summary, this invention addresses the technical challenges of wide-width Lyocell home textile fabrics, low mechanical action in processing equipment, easy abrasion after fiber swelling, and poor controllability of microfibrillation. It combines alkali desizing, flat-width washing, loose gradient acid opening, flat dyeing, loose enzyme polishing, sizing and setting, pre-shrinking, and air beating to construct a complete preparation process for micro-fluffy Lyocell fabrics for home textiles. By increasing air and water volume and operating at low speed, the mechanical action intensity is enhanced, and an anti-abrasion agent is used to prevent abrasion of the fabric. The entire process is loose and tension-free, enabling the construction of a uniform, stable, and abrasion-free microfluffy layer (i.e., microfibril layer) on the fabric surface. This weakens the cold feel of Lyocell fabrics and solves problems such as high shedding rate, insufficient fibrillation, easy abrasion of the fluff during processing, and poor fluffiness stability caused by the napping process. This process is suitable for the production of wide-width home textile fabrics, has strong universality, and is easy to industrialize.

[0061] The fabric of this application has the following advantages: (1) The fabric has been transformed from a traditional smooth and cold feel to a delicate and soft velvety touch. This application significantly reduces the instantaneous coldness of the fabric upon contact (Q). max The significant decrease in value effectively weakens the cooling properties of Lyocell fabric, making it suitable for autumn and winter bedding use and breaking the seasonal application limitations of Lyocell fabric.

[0062] (2) Loose gradient acid splitting can achieve gentle microfibrillation of the fiber surface. The microfiber layer originates from fiber splitting rather than mechanical abrasion and has a high degree of bonding with the fiber matrix. Compared with traditional brushed fabrics, this application significantly reduces the risk of shedding and pilling and improves the anti-shedding performance.

[0063] (3) A uniform and dense micro-fleece layer is formed on the surface of the fabric, presenting a delicate and soft matte luster, which is skin-friendly and has a rich texture.

[0064] (4) The microfiber structure has excellent stability. After multiple standard washes, it can still maintain the integrity of the microfiber structure and the consistency of the soft and smooth feel, and has excellent durability.

[0065] This application, without relying on traditional mechanical brushing processes, achieves precise control of fiber microstructure through the synergistic process of loose gradient acid fiber opening, optimized mechanical action, and loose enzyme polishing. This results in a synergistic performance of fabric with "low cooling sensation, high softness, low shedding, high durability, and no processing damage," providing a new technical path for the all-season application of Lyocell fabrics. It combines process innovation with industrial application value.

[0066] Optionally, alkaline desizing includes: padding the fabric with a desizing solution containing an inorganic alkali, a penetrant, and a desizing agent, followed by rolling and stacking the fabric under sealed, tension-free conditions. The inorganic alkali is selected from sodium hydroxide or potassium hydroxide, or a combination of both. In the desizing solution, the concentration of the inorganic alkali is 8 g / L-15 g / L, preferably 10 g / L-15 g / L; the concentration of the penetrant is 2 g / L-3 g / L, preferably 2.5 g / L-3 g / L; and the concentration of the desizing agent is 1 g / L-2 g / L, preferably 1.5 g / L-2 g / L. The temperature of the desizing solution is 20℃-30℃, preferably 25℃-30℃. During the padding process, the machine speed is 27 m / min-54 m / min, preferably 30 m / min-45 m / min. The padding residue is 70%-75%, preferably 72%-75%. The fabric is rolled and stacked at a temperature of 20℃-30℃, preferably 25℃-30℃; the rolling and stacking time is 24h-48h, preferably 25h-48h. During the rolling and stacking process, the fabric is rotated at a speed of 6r / min-7r / min. After rolling and stacking, the fabric is soaked in water for 5min-10min. If it feels soft to the touch, the lyocell fibers are fully swollen and there is no risk of secondary swelling. After subsequent washing, the fabric has no sizing residue, a smooth surface, and a desizing rate of ≥95%, indicating that the desizing is qualified. If the fabric feels soft to the touch and hardens after washing, the concentration of inorganic alkali is too low, and sodium hydroxide needs to be added to the desizing solution before re-impregnation and stacking.

[0067] In this invention, "sealed tension-free" refers to a state in a closed environment that is not subject to external mechanical tensile force. "Loose tension-free" refers to a state that is not subject to external mechanical tensile force.

[0068] This invention enables the simultaneous swelling of lyocell fibers and desizing of the fabric through alkali desizing, replacing the traditional alkali cold stacking + separate desizing process. This simplifies the process and lays the foundation for subsequent fibrillation.

[0069] In this invention, controlling the roll-up rate to 70%-75% ensures that the desizing solution containing inorganic alkali penetrates evenly into the fiber interior without any dead zones, guaranteeing the desizing effect. Rolling and stacking the fabric under sealed, tension-free conditions avoids creases, tension damage, localized swelling, or uneven desizing.

[0070] Optionally, the flat-width washing includes: washing the greige fabric 3-4 times, with the first wash using warm water at 40℃-50℃, preferably 45℃-50℃; and subsequent washes using warm water at 60℃-70℃, preferably 65℃-70℃. During each wash, the machine speed is 40m / min-50m / min, preferably 40m / min-45m / min, i.e., gentle washing under low mechanical force to avoid stretching or deformation of the greige fabric. After flat-width washing, the surface of the greige fabric should be free of obvious sizing or impurities, and the pH value of the greige fabric should be 5.5-6.5 (slightly acidic range) to provide a suitable acid-base basis for subsequent fiber opening.

[0071] Optionally, the organic acid used in the loose gradient acid splitting process includes citric acid or oxalic acid, or a combination of both. The pH of the first splitting solution is 3.0-3.5, preferably 3.3-3.5; the temperature of the first splitting solution is 50℃-60℃, preferably 55℃-60℃. In the first splitting solution, the concentration of the organic acid is 5g / L-8g / L, preferably 6g / L-8g / L; the concentration of the anti-abrasion agent is 2g / L-3g / L, preferably 2.5g / L-3g / L; and the concentration of the splitting agent is 1g / L-1.5g / L, preferably 1.2g / L-1.5g / L. The pH of the second splitting solution is 2.5-3.0, preferably 2.8-3.0. The temperature of the second splitting solution is 70℃-80℃, preferably 75℃-80℃. In the second fiber-opening solution, the concentration of organic acid is 3 g / L-5 g / L, preferably 4 g / L-5 g / L; the concentration of anti-abrasion agent is 2 g / L-3 g / L, preferably 2.5 g / L-3 g / L; and the concentration of fiber-opening agent is 1.5 g / L-2 g / L, preferably 1.8 g / L-2 g / L. Fiber opening is performed under loose, tension-free conditions, with each opening treatment lasting 30-40 minutes, preferably 35-40 minutes. The washing process is repeated at least twice. After fiber opening, the washing temperature is 60℃-70℃, preferably 65℃-70℃; and the washing time is 10-15 minutes per wash, preferably 12-15 minutes per wash. The fabric is washed until the pH value is 4.5-5.5.

[0072] Optionally, the flat dyeing process includes: placing the opened fabric in a dye bath containing reactive dyes for flat dyeing treatment, followed by one wash at room temperature, two washes at warm water, and one soap wash, then washing until no floating color remains on the fabric surface, and finally adjusting the pH of the fabric to 7.0 (neutral) using a pH adjuster. The concentration of reactive dyes in the dye bath is 3 g / L-5 g / L, preferably 3.5 g / L-5 g / L. During the flat dyeing process, the liquor ratio is 1:20-25, preferably 1:21-25. During the flat dyeing process, the temperature is increased to 60℃-65℃ at a rate of 1℃ / min-2℃ / min and held for 30 min-40 min; preferably, the temperature is increased to 62℃-65℃ at a rate of 1.5℃ / min-2℃ / min and held for 35 min-40 min. To balance dye uniformity and microfibril layer structure stability, the rotation speed during the flat-dyeing process is controlled at 7-10 r / min, preferably 7-10 r / min. The room-temperature water wash time is 6-9 min, preferably 7-9 min; the warm water temperature is 63℃-66℃, preferably 64℃-66℃. The warm water wash time is 8-11 min / cycle, preferably 9-11 min / cycle. During the soaping process, the concentration of the soaping agent in the soaping solution is 1.2 g / L-1.6 g / L, preferably 1.3 g / L-1.6 g / L. The temperature of the soaping solution is 90℃-95℃, preferably 92℃-95℃. The soaping time is 10-15 min, preferably 11-15 min. Glacial acetic acid or similar substances can be used as pH adjusters. Flat-boiler dyeing can reduce mechanical friction and avoid damage to the microfibril layer.

[0073] Optionally, the loose-type enzyme polishing includes: polishing the greige fabric after flat-dyeing with an enzyme treatment solution of pH 6.0-6.5, heating to 85℃-90℃ and adjusting the pH to 8.5-9.0, and maintaining the temperature. Preferably, the greige fabric after flat-dyeing is polished with an enzyme treatment solution of pH 6.2-6.5, heated to 88℃-90℃ and adjusting the pH to 8.8-9.0, and maintained at this temperature to inactivate the enzyme; then the greige fabric is washed with water. The enzyme treatment solution includes neutral cellulase, xylanase, and an anti-abrasion agent. In the enzyme treatment solution, the concentration of neutral cellulase is 6g / L-8g / L, preferably 7g / L-8g / L; the concentration of xylanase is 2g / L-3g / L, preferably 2.5g / L-3g / L; and the concentration of the anti-abrasion agent is 2g / L-3g / L, preferably 2.5g / L-3g / L. The temperature of the enzyme treatment solution is 45℃-50℃, preferably 48℃-50℃. The polishing time is 35min-40min, preferably 38min-40min. The circulation flow rate of the enzyme treatment solution is 50L / min-60L / min, preferably 55L / min-60L / min. Polishing is performed under loose, tension-free conditions. During polishing, the air volume is 800m³ / h-1000m³ / h, preferably 850m³ / h-1000m³ / h; the water volume is 120L / min-150L / min, preferably 135L / min-150L / min; and the vehicle speed is 5m / min-10m / min, preferably 5m / min-8m / min. The temperature is increased to 85℃-90℃ at a rate of 2℃ / min-3℃ / min, preferably to 88℃-90℃ at a rate of 2.5℃ / min-3℃ / min. The washing process is performed at least twice. The first wash uses warm water at 70℃-80℃, preferably 75℃-80℃. The subsequent washes use warm water at 50℃-60℃, preferably 55℃-60℃. The washing time is 10min / wash-15min / wash, preferably 12min / wash-15min / wash.

[0074] This invention achieves the shaping and optimization of the microfibril layer through selective enzyme degradation, removing messy loose fibers and making the fluff more delicate and uniform.

[0075] Optionally, the sizing and setting process includes: padding the loosely enzyme-polished fabric with a treatment solution containing a softener, performing a sizing and softening treatment during this process, and then setting the fabric. The mass ratio of softener to fabric is 1-3:100, preferably 1.5-3:100. The concentration of softener in the treatment solution is 1 g / L-2 g / L, preferably 1.5 g / L-2 g / L. The temperature of the treatment solution is 40℃-50℃, preferably 45℃-50℃. The padding residue is 60%-75%, preferably 65%-75%. To avoid deformation of the microfiber layer due to stretching, the tension during the sizing and softening treatment is 5N-8N, preferably 6N-8N. During the setting process, the first stage temperature is 70℃-80℃, preferably 75℃-80℃; the second stage temperature is 100℃-105℃, preferably 102℃-105℃; and the third stage temperature is 106℃-110℃, preferably 108℃-110℃. During the setting process, the machine speed is 30m / min-40m / min, preferably 35m / min-40m / min. After sizing and setting, the warp and weft dimensional deviations of the fabric are ≤±1%, it is flat and wrinkle-free, the micro-pile layer is not flattened or detached, and it has a soft hand feel without stiffness.

[0076] Optionally, pre-shrinking includes: pre-shrinking the sized and set fabric at a temperature of 95℃-105℃, a pressure of 0.3MPa-0.4MPa, and a machine speed of 20m / min-30m / min. Preferably, the pre-shrinking treatment is performed on the sized and set fabric at a temperature of 100℃-105℃, a pressure of 0.35MPa-0.4MPa, and a machine speed of 25m / min-30m / min. After pre-shrinking, the warp shrinkage rate of the fabric should be ≤3.0%, the weft shrinkage rate should be ≤3.5%, the internal stress is completely eliminated, the micro-fleece layer remains fluffy, and there is no flattening or collapse. Pre-shrinking can eliminate the internal stress of the fabric, achieve accurate dimensional setting, prevent the fabric from shrinking and deforming during subsequent use, and further improve the fluffiness of the micro-fleece layer.

[0077] Optionally, the air beating process includes: beating the pre-shrunken fabric for 5-8 seconds at a machine speed of 30-40 m / min, a temperature of 120-130°C, and an air pressure of 0.1-0.2 MPa; preferably, beating the pre-shrunken fabric for 6-8 seconds at a machine speed of 35-40 m / min, a temperature of 125-130°C, and an air pressure of 0.15-0.2 MPa. During the air beating process, the high-pressure airflow is uniformly and gently flowed vertically across the fabric surface. After air beating, the micro-fleece layer on the fabric surface is fluffy and uniform, without localized flattening or floating dust; the micro-fleece layer is delicate and soft, without any itching sensation, and the fibers are uniformly oriented. Air tapping uses high-pressure air to gently tap the surface of the fabric, combing the microfiber layer, making the pile distribution more even and fluffy, improving the fineness and skin-friendliness of the microfiber layer, and removing dust from the fabric surface.

[0078] Another embodiment of the present invention provides a micro-fluffy Lyocell fabric for home textiles prepared according to the method described above.

[0079] Another embodiment of the present invention provides a textile comprising the micro-fluffy Lyocell fabric for home textiles as described above.

[0080] It should be noted that there are no restrictions on textiles in this invention; for example, items such as duvet covers, sheets, and pillowcases can be included.

[0081] Furthermore, the meaning of "and / or" throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0082] Example 1 S1. Alkali desizing: S1.1 Preparation of desizing solution: Add sodium hydroxide, cold pile permeabilizer TY1-15 and high-efficiency desizing agent M-1011Z to deionized water and stir until completely dissolved to obtain a desizing solution with a sodium hydroxide concentration of 12 g / L, a cold pile permeabilizer TY1-15 concentration of 2.5 g / L and a high-efficiency desizing agent M-1011Z concentration of 1.5 g / L. S1.2 Padding Treatment: The greige fabric (a wide-width Lyocell woven fabric with a warp and weft density of 320 threads / inch × 130 threads / inch and an 8-end satin weave, made of 100S Tencel in the warp and 60S cotton in the weft, Tencel is Lyocell) was padded with a desizing solution at a temperature of 25℃ at a speed of 45m / min and a padding rate of 72%; S1.3 Rolling and Stacking: At 25℃, the padded fabric is rolled and stacked (stacked under sealed, tension-free conditions) for 24 hours. During the rolling and stacking process, it is rotated at a speed of 7 r / min. After rolling and stacking, the fabric feels stiff to the touch, but softens rapidly after soaking in water for 8 minutes, indicating that the Tencel has fully swelled and there is no risk of secondary swelling. After subsequent washing, there is no residue of sizing agent on the fabric surface, and the desizing rate is 96% (the desizing rate is tested according to "HG / T 5080-2016 Determination of the Desizing Effect of Textile Dyeing and Finishing Auxiliaries and Desizing Agents on Starch Sizing Agents", the same below), which means the desizing is qualified, and the next step can be carried out. S2. Flat-width washing: The rolled and stacked fabric is washed 4 times at a speed of 45m / min. During the first wash, the water temperature is 45℃, and during the subsequent washes, the water temperature is 65℃. The water replenishment flow rate is 90L / min during each wash. After flat-width washing, there is no obvious residue of sizing agent or impurities on the surface of the fabric, and the pH value of the fabric surface is 6.0 (weakly acidic). S3. Fiber Opening: S3.1 Preparation of fiber-opening solution: Add citric acid, DM-1161 (a Lyocell fiber-specific fiber opener), and CG-100 (a commercially available anti-abrasion agent whose main component is polyacrylamide, hereinafter the same) to deionized water, stir well, and add citric acid to adjust the pH to 3.2 to obtain a fiber opener solution with a concentration of 6.5 g / L of citric acid, a concentration of 1.2 g / L of DM-1161 (a Lyocell fiber-specific fiber opener), and a concentration of 2.5 g / L of CG-100. Add citric acid, DM-1161 (a special fiber-opening agent for Lyocell fibers), and Yuzhongbao (a product name) to deionized water and stir well. Adjust the pH to 2.8 with citric acid to obtain fiber-opening solution II, which has a concentration of 4 g / L of citric acid, a concentration of 1.8 g / L of DM-1161 (a special fiber-opening agent for Lyocell fibers), and a concentration of 2.5 g / L of Yuzhongbao CG-100. S3.2 Fiber opening treatment: Under loose and tension-free conditions, the washed fabric is passed sequentially through acid tank one and acid tank two of the air-liquid washing machine. Acid tank one and acid tank two are pre-filled with fiber opening liquid one at a temperature of 55℃ and fiber opening liquid two at a temperature of 75℃, respectively, for fiber opening treatment. During the fiber opening treatment, the air volume is 900m³ / h, the water volume is 135L / min, the machine speed is 9m / min, and the time for each fiber opening treatment is 30min. S3.2 Washing after fiber opening: Next, wash the fabric twice with 65℃ warm water for 12 minutes each time. At this time, the pH value of the fabric surface is 5.0. S4. Dyeing: S4.1 Preparation of dyeing solution: Add reactive dye (using three reactive dyes from DyStar: DyStar Red AM, Yellow AM, and Livre Blue CA) to deionized water, stir evenly to obtain a dyeing solution with a concentration of 4 g / L of reactive dye. S4.2 Flat dyeing treatment: The flat dyeing method is adopted. The preform after fiber opening is placed in the dye bath for flat dyeing treatment. The liquor ratio is 1:22 and the rotation speed is 9r / min. During this process, the dye bath is heated to 62℃ at a rate of 1.5℃ / min and kept at this temperature for 35min. S4.3 Post-dyeing washing: Subsequently, wash with room temperature water for 8 minutes, followed by two washes with 65℃ warm water for 10 minutes each time. Then, wash with a soaping solution at 92℃ (the soaping solution is prepared by adding soaping agent JV-716 (main component is acrylic acid / polypropylene copolymer) to deionized water and stirring until a soaping solution with a concentration of 1.5 g / L of soaping agent JV-716 is obtained) for 12 minutes. Next, wash with water until there is no floating color on the surface of the fabric, and then adjust the pH of the fabric surface to 7.0 (neutral) with glacial acetic acid. S5. Loose-leaf enzyme polishing: Preparation of S5.1 enzyme treatment solution: Neutral cellulase, xylanase, and Yuzhongbao were added to deionized water and stirred until homogeneous. Glacial acetic acid was added to adjust the pH to 6.2, resulting in an enzyme treatment solution with a concentration of 7 g / L of neutral cellulase, 2.5 g / L of xylanase, and 2.5 g / L of Yuzhongbao. S5.2 Polishing treatment: Under loose, tension-free conditions, an air-liquid water washing machine is used to polish the fabric after step S4 using an enzyme treatment solution at a temperature of 48℃. During the polishing treatment, the air volume is 900 m³ / h, the water volume is 135 L / min, the machine speed is 10 m / min, the circulation flow rate of the enzyme treatment solution is 55 L / min, and the polishing time is 38 min. Heat to 88℃, add sodium carbonate solution, adjust pH to 8.8, and keep warm for 10 minutes to inactivate the enzyme; S5.3 Washing after polishing: Next, wash the fabric with 75℃ warm water for 12 minutes, and then wash the fabric with 55℃ warm water for 12 minutes. At this time, the pH value of the fabric surface is 7.0, and there are no loose fibers or scratches on the fabric surface. S6. Pulley pulling and shaping: Preparation of S6.1 treatment solution: Add softener G-2551 to deionized water and stir evenly to obtain a treatment solution with a softener concentration of 1.5 g / L. The greige fabric after enzyme polishing was impregnated with a treatment solution at 45℃. The mass ratio of softener G-2551 to greige fabric was 1:100, and the roll-off rate was 62%. During this process, sizing and softening treatment was carried out (tension of 6.5N), followed by setting. During the setting process, the temperature of the first stage was 80℃, the temperature of the second stage was 100℃, and the temperature of the third stage was 106℃, and the speed was 35m / min. At this time, the warp and weft dimensional deviations of the greige fabric were ±0.8%, the surface of the greige fabric was flat and wrinkle-free, the pile was not flattened or shed, and it had a soft hand feel without stiffness. S7. Pre-shrinkage: Under the conditions of 100℃, 0.35MPa and 25m / min, the sizing and shaping fabric is loosely pre-shrinked using a felt pre-shrinking machine. At this time, the warp shrinkage rate of the fabric is 2.5% and the weft shrinkage rate is 3.0%. The internal stress is completely eliminated, the micro-fleece layer remains fluffy, and there is no flattening or collapse. S8. Air Beating: Under conditions of a machine speed of 35m / min, a temperature of 120℃, and an air pressure of 0.15MPa, the pre-shrunken fabric is air-beaten using a wide-width air beating device specifically designed for home textiles (the fabric is laid flat without tension; in other words, air beating is performed under loose, tension-free conditions) for 8 seconds. During this process, the high-pressure airflow beats the fabric surface vertically in a uniform, soft flow. At this point, the micro-fleece layer on the fabric surface is fluffy and uniform, without localized flattening or floating dust. The fleece is delicate and soft to the touch, without any itching sensation, and the fleece is uniformly oriented, resulting in a micro-fleece Lyocell fabric for home textiles (e.g., ...). Figure 1 As shown in A, 2A, and 3A, where 1A is an electron microscope image of the Lyocell fabric obtained in this embodiment, 2A is an electron microscope image of the surface of the Lyocell fabric obtained in this embodiment, and 3B is a morphological diagram of the pile layer of the Lyocell fabric obtained in this embodiment.

[0083] Depend on Figure 1 , Figure 2 and Figure 3 It is known that fabrics produced by existing brushing processes exhibit significant fiber breakage and severe shedding, while the fabric produced in this embodiment shows no significant fiber breakage and no shedding. Furthermore, compared to brushing processes, the fabric produced by the process of this application has a finer nap.

[0084] Example 2 S1. Alkali desizing: S1.1 Preparation of desizing solution: Add sodium hydroxide, cold pile permeabilizer TY1-15 and high-efficiency desizing agent M-1011Z to deionized water and stir until completely dissolved to obtain a desizing solution with a sodium hydroxide concentration of 10 g / L, a cold pile permeabilizer TY1-15 concentration of 2 g / L and a high-efficiency desizing agent M-1011Z concentration of 1 g / L. S1.2 Padding Treatment: The greige fabric (a wide-width Lyocell woven fabric with a warp and weft density of 200 threads / inch × 100 threads / inch and a five-end satin weave, made of 60S×60S cotton in both warp and weft directions, Tencel is Lyocell) was padded with a desizing solution at a temperature of 23℃ at a machine speed of 30m / min and a padding rate of 72%; S1.3 Rolling and Stacking: At 23℃, the impregnated fabric is rolled and stacked (stacked under sealed, tension-free conditions) for 24 hours. During the rolling and stacking process, it is rotated at a speed of 6 r / min. After rolling and stacking, the fabric feels stiff to the touch, but softens rapidly after soaking in water for 7 minutes, indicating that the Tencel has fully swelled and there is no risk of secondary swelling. After subsequent washing, there is no sizing residue on the fabric surface, and the desizing rate is 95% (the desizing rate is tested according to the above method), which means that the desizing is qualified and the next step can be carried out. S2. Flat-width washing: The rolled and stacked fabric is washed three times at a speed of 40m / min. The water temperature is 40℃ during the first wash and 60℃ during the subsequent washes. The water flow rate is 85L / min during each wash. After flat-width washing, there is no obvious residue of sizing agent or impurities on the surface of the fabric, and the pH value of the fabric surface is 5.5 (weakly acidic). S3. Fiber Opening: S3.1 Preparation of fiber-opening solution: Add citric acid, DM-1161 (a special fiber-opening agent for Lyocell fibers), and Yuzhongbao (a bath tonic) to deionized water and stir well. Adjust the pH to 3.3 with citric acid to obtain a fiber-opening solution with a concentration of 6 g / L of citric acid, a concentration of 1 g / L of DM-1161 (a special fiber-opening agent for Lyocell fibers), and a concentration of 2 g / L of Yuzhongbao. Add citric acid, DM-1161 (a special fiber-opening agent for Lyocell fibers), and Yuzhongbao (a bath tonic) to deionized water and stir well. Adjust the pH to 2.9 with citric acid to obtain fiber-opening solution II with a concentration of 3.5 g / L of citric acid, 1.5 g / L of DM-1161 (a special fiber-opening agent for Lyocell fibers), and 2 g / L of Yuzhongbao. S3.2 Fiber opening treatment: Under loose and tension-free conditions, the washed fabric is passed sequentially through acid tank one and acid tank two of the air-liquid washing machine. Acid tank one and acid tank two are pre-filled with fiber opening liquid one at a temperature of 50℃ and fiber opening liquid two at a temperature of 70℃, respectively, for fiber opening treatment. During the fiber opening treatment, the air volume is 850m³ / h, the water volume is 125L / min, the machine speed is 10m / min, and the time for each fiber opening treatment is 40min. S3.2 Washing after fiber opening: Next, the fabric is washed twice with 60℃ warm water for 10 minutes each time. At this time, the pH value of the fabric surface is 4.8. S4. Dyeing: S4.1 Preparation of dyeing solution: Add reactive dye (using three reactive dyes from DyStar: DyStar Red AM, Yellow AM, and Livre Blue CA) to deionized water, stir evenly to obtain a dyeing solution with a concentration of 3.5 g / L of reactive dye. S4.2 Flat dyeing treatment: The flat dyeing method is adopted. The preform after fiber opening is placed in the dye bath for flat dyeing treatment. The liquor ratio is 1:20 and the rotation speed is 8r / min. During this process, the dye bath is heated to 60℃ at a rate of 1℃ / min and kept at that temperature for 30min. S4.3 Post-dyeing washing: Subsequently, wash with room temperature water for 7 minutes, followed by two washes with 60℃ warm water for 9 minutes each time. Then, perform soap washing (the soap washing solution is prepared by adding soap washing agent JV-716 (the main component is acrylic acid / polypropylene copolymer) to deionized water and stirring evenly to obtain a soap washing solution with a concentration of 1.2g / L of soap washing agent JV-716); then, wash with water until there is no floating color on the surface of the fabric, and then adjust the pH of the fabric surface to 6.8 (neutral) with glacial acetic acid. S5. Loose-leaf enzyme polishing: Preparation of S5.1 enzyme treatment solution: Neutral cellulase, xylanase, and Yuzhongbao were added to deionized water and stirred evenly. Glacial acetic acid was added to adjust the pH to 6.0, resulting in an enzyme treatment solution with a concentration of 6.5 g / L of neutral cellulase, 2 g / L of xylanase, and 2 g / L of Yuzhongbao. S5.2 Polishing treatment: Under loose, tension-free conditions, an air-liquid water washing machine is used to polish the fabric after step S4 using an enzyme treatment solution at a temperature of 45℃. During the polishing treatment, the air volume is 850 m³ / h, the water volume is 125 L / min, the machine speed is 10 m / min, the circulation flow rate of the enzyme treatment solution is 50 L / min, and the polishing time is 35 min. Heat to 85°C and add sodium carbonate solution to adjust the pH to 8.5. Keep warm for 10 minutes to inactivate the enzyme. S5.3 Washing after polishing: Next, wash the fabric with 70℃ warm water for 10 minutes, and then wash the fabric with 50℃ warm water for 10 minutes. At this time, the pH value of the fabric surface is 6.8, and there are no loose fibers or scratches on the fabric surface. S6. Pulley pulling and shaping: Preparation of S6.1 treatment solution: Add softener G-2551 to deionized water and stir evenly to obtain a treatment solution with a softener G-2551 concentration of 1 g / L. The greige fabric after enzyme polishing was impregnated with a treatment solution at 40℃. The mass ratio of softener G-2551 to greige fabric was 3:100, and the roll-off rate was 60%. During this process, sizing and softening treatment was carried out (tension of 5N), followed by setting. During the setting process, the temperature of the first stage was 70℃, the temperature of the second stage was 105℃, and the temperature of the third stage was 110℃, and the speed was 30m / min. At this time, the warp and weft dimensional deviations of the greige fabric were ±0.7%, the surface of the greige fabric was flat and wrinkle-free, the pile was not flattened or shed, and it had a soft hand feel without stiffness. S7. Pre-shrinkage: Under the conditions of 98℃, 0.3MPa and 20m / min, the sizing and shaping fabric is loosely pre-shrinked using a felt pre-shrinking machine. At this time, the warp shrinkage rate of the fabric is 2.2% and the weft shrinkage rate is 2.8%. The internal stress is completely eliminated, the micro-fleece layer remains fluffy, and there is no flattening or collapse. S8. Air Beating: Under the conditions of a vehicle speed of 30m / min, a temperature of 130℃ and an air pressure of 0.12MPa, the pre-shrunken fabric is air beaten with a wide-width air beating device for home textiles (the fabric is laid flat without tension, in other words, air beating is carried out under loose and tension-free conditions) for 5s. During this process, the high-pressure airflow beats the surface of the fabric vertically in a uniform and soft flow. At this time, the micro-fleece layer on the surface of the fabric is fluffy and uniform, without local flattening or floating dust. The fluff is delicate and soft to the touch, without any itching sensation. The fluff is oriented in a consistent direction, resulting in a micro-fleece Lyocell fabric for home textiles.

[0085] Comparative Example 1 The difference between this comparative example and Example 1 is that the air volume during the fiber opening process is 780 m³ / h.

[0086] Comparative Example 2 The difference between this comparative example and Example 1 is that the air volume during the fiber opening process is 1100 m³ / h.

[0087] Comparative Example 3 The difference between this comparative example and Example 1 is that the water flow rate during the fiber opening process is 110L / min.

[0088] Comparative Example 4 The difference between this comparative example and Example 1 is that the water flow rate during the fiber opening process is 160L / min.

[0089] Comparative Example 5 The difference between this comparative example and Example 1 is that the machine speed during the fiber opening process is 4m / min.

[0090] Comparative Example 6 The difference between this comparative example and Example 1 is that the machine speed during the fiber opening process is 11m / min.

[0091] Comparative Example 7 The difference between this comparative example and Example 1 is that sodium hydroxide is used instead of citric acid in fiber-opening solution one and fiber-opening solution two.

[0092] Comparative Example 8 The difference between this comparative example and Example 1 is as follows: S3.2 Fiber Opening Treatment: Under loose, tension-free conditions, the washed fabric is passed through the acid tank of the air-liquid washing machine. The acid tank is pre-filled with fiber opening liquid II at a temperature of 75℃ for fiber opening treatment. During the fiber opening treatment, the air volume is 900m³ / h, the water volume is 135L / min, the machine speed is 9m / min, and the fiber opening treatment time is 22min.

[0093] The difference between this comparative example and Example 1 is that the acid fiber opening process is performed in one step instead of using acid for gradient fiber opening.

[0094] Comparative Example 9 Except for the following conditions, the Lyocell fabric was prepared in the same manner as in Example 1: S3.1 Preparation of fiber-opening solution: Add citric acid, DM-1161 (a Lyocell fiber-specific fiber opener), and CG-100 (a commercially available anti-abrasion agent whose main component is polyacrylamide, hereinafter the same) to deionized water, stir well, and add citric acid to adjust the pH to 3.2 to obtain a fiber opener solution with a concentration of 4 g / L of citric acid, a concentration of 1.2 g / L of DM-1161 (a Lyocell fiber-specific fiber opener), and a concentration of 2.5 g / L of CG-100. Add citric acid, DM-1161 (a special fiber-opening agent for Lyocell fibers), and Yuzhongbao (a product name) to deionized water and stir well. Adjust the pH to 2.8 with citric acid to obtain fiber-opening solution II, which has a concentration of 6.5 g / L of citric acid, a concentration of 1.8 g / L of DM-1161 (a special fiber-opening agent for Lyocell fibers), and a concentration of 2.5 g / L of Yuzhongbao CG-100.

[0095] The difference between this comparative example and Example 1 is that the concentration of citric acid in the first fiber-opening solution is 4 g / L, while the concentration of citric acid in the second fiber-opening solution is 6.5 g / L, meaning that the concentration of citric acid in the first fiber-opening solution is less than that in the second fiber-opening solution.

[0096] Comparative Example 10 Except for the following conditions, the Lyocell fabric was prepared in the same manner as in Example 1: S3. The washed fabric is then subjected to a napping process. The specific steps are as follows: a five-roll napping machine is used. The first and second rolls are made of 200-mesh sanding belts, and the last three rolls are made of 300-mesh sanding belts. The napping machine has a wrap angle of three sections, a machine speed of 18m / min, and a roll rotation speed of 80r / min.

[0097] The difference between this comparative example and Example 1 is that a brushing process is used instead of a gradient acid fiber opening process.

[0098] test The lint shedding level of the micro-fluffy Lyocell fabrics for home textiles prepared in each embodiment and comparative example was evaluated after washing. The specific steps were as follows: Take a 70cm diameter... For 70cm lengths of fabric, each sample was washed in a Type A washing machine according to GB / T 8629-2017 "Home Washing and Drying Procedures for Textile Testing" with a 6N washing program, once, and then hung to dry. Then, following GB / T 4802.2-2008 "Determination of Pilling Properties of Textile Fabrics - Part 2: Modified Martindale Method", three sets of circular specimens with a diameter of 140±0.5mm were taken from the above samples. Each set contained two specimens, one mounted in a specimen holder and the other used as an abrasive mounted on a pilling table. The specimens must be free of defects that could affect the test results. The test was conducted according to GB / T 4802.2-2008 "Determination of Pilling Properties of Textile Fabrics - Part 2: Modified Martindale Method", with 2000 rub cycles. Next, start the instrument. After the test, remove the clamps, leaving the sample fabric used as abrasive on the balling platform. Keep your eyes 60cm away from the sample, with your line of sight at a 45° angle to the sample surface (the plane of the balling platform); then proceed as follows... Figure 4The hair removal grading samples (sample size 70cm×70cm) are used for grading. The grading result of a single tester is the average of the grades of all samples. If the result of a single sample is between two grades, it is graded as 0.5 and indicated by "-", such as grade 3-4. If the average of 3 samples is not an integer or grade 0.5, it is rounded to the nearest grade. When the test result is at the threshold of the pass standard or is unqualified, one more person is added to the grading, and the average of the two is taken as the final result. If the test result of a single test is more than half a grade lower than the average, the grade of each sample should be reported at the same time, and the test result is processed by reducing the average by half a grade. The results are shown in Table 1. Grade 5 --- No lint or short fibers around the abrasive on the balling platform; Grade 4-5 --- There are very small amounts of fuzz and / or short fibers around the abrasive on the balling platform; Level 4 --- A small amount of fuzz and / or short fibers are present around the abrasive on the balling platform; Level 3-4 --- There are a small number of fuzz balls and / or short fibers around the abrasive on the balling platform, which are more obvious in some areas; Level 3 --- Obvious fuzz and / or short fibers are present around the abrasive on the balling platform; Level 2-3 --- There are obvious fuzz balls and / or short fibers around the abrasive on the balling platform, with more in some areas; Level 2 --- There are many fuzz balls and / or short fibers around the abrasive on the balling platform; Level 1-2 --- There are many fuzz balls and / or short fibers around the abrasive on the balling platform, with severe localization; Grade 1 --- The abrasive on the balling platform has a large number of fuzz balls and / or short fibers around it; The lint shedding rate of the micro-fluffy Lyocell fabrics for home textiles prepared in each embodiment and comparative example was tested. The specific steps were as follows: Take a 70cm diameter... For 70cm lengths of fabric, each sample was washed in a Type A washing machine according to the "Household Washing and Drying Procedures for Textile Testing" standard (GB / T 8629-2017). The washing program was set to 6N, and the samples were washed once. After drying, the shed fibers were collected and weighed (i.e., the shed fiber rate). The results are shown in Table 1. The weight loss rate was calculated using the formula: Weight Loss Rate = Total Mass of Shed Fiber / Mass of Sample Before Treatment. The weight loss rate was calculated at 100%, and the results are shown in Table 1. The weft breaking strength of the home textile micro-fleece Lyocell fabrics prepared in each example and comparative example was tested according to GB / T 3923.1-2013 Textiles - Tensile properties of fabrics - Part 1: Determination of breaking strength and elongation at break (strip method). The results are shown in Table 1. According to GB / T 35263-2017 "Test and Evaluation of Instant Cooling Performance of Textiles", the contact cooling coefficient (i.e., Q) of the micro-fluffy Lyocell fabrics for home textiles prepared in each example and comparative example was tested. max The test results are shown in Table 1. The microfiber coverage rate of the home textile microfiber-feel lyocell fabrics prepared in each embodiment and comparative example was tested. The specific steps were as follows: the surface of the test sample was photographed using an image acquisition device, and then binarized. The ratio of the surface area of ​​the area covered with microfibers to the total surface area of ​​the test sample was calculated by software (this ratio is the microfiber coverage rate). The results are shown in Table 1.

[0099] Table 1 Test Results

[0100] Note: Q max ≥0.15J / (cm) 2 ·s) indicates that it has a cooling effect.

[0101] As shown in Table 1, the lint-free Lyocell fabrics for home textiles prepared in Examples 1-2 have a lint-free grade ≥3, a lint-free rate of <0.32g after washing and drying, and a cooling sensation coefficient of <0.13J / (cm²). 2 ·s). This result shows that the Lyocell fabric prepared by this invention can maintain a micro-fluffy feel (such as ·s). Figure 3 (As shown in A) At the same time, it effectively suppresses lint shedding and reduces the contact cooling coefficient to a low level, improving the seasonal adaptability of the fabric.

[0102] As shown in Table 1, compared with Comparative Examples 1-6, the lint shedding rate of the micro-fluffy Lyocell fabric for home textiles prepared in Example 1 was significantly reduced during washing and drying. This result indicates that the present invention, by controlling the airflow, water flow, and machine speed during the loose gradient acid opening process, can significantly reduce lint shedding and improve the durability of the fluffy feel.

[0103] As shown in Table 1, compared with Comparative Example 7, the weft breaking strength of the micro-fluffy Lyocell fabric for home textiles prepared in Example 1 was significantly improved. This result indicates that the gradient acid treatment used in this invention can improve the mechanical strength of the fabric.

[0104] As shown in Table 1, compared with Comparative Example 8, the microfiber coverage and weft breaking strength of the microfiber-feel lyocell fabric for home textiles prepared in Example 1 were significantly improved. This result indicates that the gradient fiber-opening treatment using acid in this invention can improve the uniformity of the microfiber.

[0105] As shown in Table 1, compared with Comparative Example 9, the microfiber coverage and weft breaking strength of the home textile microfiber-feel lyocell fabric prepared in Example 1 were significantly improved. This result indicates that, in this invention, by setting the concentration of organic acid in the first fiber-opening solution to be greater than that in the second fiber-opening solution, the coverage of microfiber can be effectively improved, strength damage reduced, and the instantaneous cooling sensation of the fabric lowered, making it effectively suitable for autumn and winter seasons.

[0106] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for producing a micro-fluffy Lyocell fabric for home textiles, characterized in that, Includes the following steps: The greige fabric is subjected to the following sequential treatments: alkali desizing, open-width washing, loose gradient acid fiber opening, flat dyeing, loose enzyme polishing, sizing and setting, pre-shrinking, and air beating to obtain the micro-fleece Lyocell fabric for home textiles; the greige fabric contains Lyocell fibers, and the mass percentage of Lyocell fibers in the greige fabric is greater than or equal to 50%; The loose gradient acid fiber opening process includes: placing the washed fabric in fiber opening solution one and fiber opening solution two, which contain organic acid, anti-abrasion agent and fiber opening agent, for fiber opening treatment in sequence; then washing the fabric. The concentration of organic acid in fiber opening solution one is greater than that in fiber opening solution two. During the fiber opening process, the air volume is 800m³ / h-1000m³ / h, the water volume is 120L / min-150L / min, and the machine speed is 5m / min-10m / min.

2. The method for producing the micro-fluffy Lyocell fabric for home textiles as described in claim 1, characterized in that, The alkaline desizing process includes: impregnating the fabric with a desizing solution containing inorganic alkali, penetrant and desizing agent, and then rolling and stacking the fabric under sealed tension-free conditions.

3. The method for producing micro-fluffy Lyocell fabric for home textiles as described in claim 2, characterized in that, The inorganic base is selected from sodium hydroxide or potassium hydroxide or a combination of both; And / or, the concentration of inorganic alkali in the desizing solution is 8 g / L-15 g / L; And / or, the concentration of the penetrant in the desizing solution is 2 g / L-3 g / L; And / or, the concentration of the desizing agent in the desizing solution is 1 g / L-2 g / L; And / or, the temperature of the desizing solution is 20℃-30℃; And / or, during the impregnation and rolling process, the machine speed is 27m / min-54m / min.

4. The method for producing the micro-fluffy Lyocell fabric for home textiles as described in claim 1, characterized in that, The flat-width washing includes washing the fabric 3 to 4 times.

5. The method for producing the micro-fluffy Lyocell fabric for home textiles as described in claim 1, characterized in that, The organic acid includes citric acid or oxalic acid or a combination of both; And / or, in the fiber-opening solution, the concentration of organic acid is 5 g / L-8 g / L; And / or, in the fiber-opening solution, the concentration of the anti-abrasion agent is 2g / L-3g / L; And / or, in the first fiber-opening solution, the concentration of the fiber-opening agent is 1 g / L-1.5 g / L; And / or, the pH of the fiber-opening solution is 3.0-3.5; And / or, the temperature of the fiber-opening liquid is 50℃-60℃; And / or, in the second fiber-opening solution, the concentration of organic acid is 3 g / L-5 g / L; And / or, in the second fiber-opening liquid, the concentration of the anti-abrasion agent is 2g / L-3g / L; And / or, in the second fiber-opening solution, the concentration of the fiber-opening agent is 1.5 g / L-2 g / L; And / or, the pH of the second fiber-opening solution is 2.5-3.0; And / or, the temperature of the second fiber-opening liquid is 70℃-80℃; And / or, perform fiber opening treatment under loose, tension-free conditions; And / or, the time for each fiber opening process is 30-40 minutes; And / or, the washing temperature after fiber opening is 60℃-70℃.

6. The method for producing micro-fluffy Lyocell fabric for home textiles as described in claim 1 or 5, characterized in that, The loose-type enzyme polishing includes: using an enzyme treatment solution with a pH of 6.0-6.5 and a temperature of 40℃-50℃, loosely polishing the dyed fabric for 20-30 minutes, raising the temperature to 85℃-90℃ and adjusting the pH to 8.5-9.0, maintaining the temperature, and then washing the fabric with water. The enzyme treatment solution includes neutral cellulase, xylanase, and an anti-abrasion agent.

7. The method for producing the micro-fluffy Lyocell fabric for home textiles as described in claim 6, characterized in that, The concentration of neutral cellulase in the enzyme treatment solution is 6 g / L-8 g / L; And / or, the concentration of xylanase in the enzyme treatment solution is 2 g / L-3 g / L; And / or, in the enzyme treatment solution, the concentration of the anti-abrasion agent is 2 g / L-3 g / L; And / or, the temperature of the enzyme treatment solution is 45℃-50℃; And / or, the polishing process takes 35-40 minutes; And / or, the circulation flow rate of the enzyme treatment solution is 50 L / min-60 L / min; And / or, polishing is performed under loose, tension-free conditions; And / or, during the polishing process, the air volume is 800m³ / h-1000m³ / h, the water volume is 120L / min-150L / min, and the vehicle speed is 5m / min-10m / min; And / or, heat to 85℃-90℃ at a rate of 2℃ / min-3℃ / min.

8. The method for producing the micro-fluffy Lyocell fabric for home textiles as described in claim 1, characterized in that, The pre-shrinking includes: pre-shrinking the sizing and shaping fabric under conditions of temperature of 95℃-105℃, pressure of 0.3MPa-0.4MPa and machine speed of 20m / min-30m / min; And / or, the air beating includes: air beating the pre-shrunken fabric for 5s-8s under the conditions of a vehicle speed of 30m / min-40m / min, a temperature of 120℃-130℃ and an air pressure of 0.1MPa-0.2MPa.

9. A micro-fluffy Lyocell fabric for home textiles prepared according to any one of claims 1-8.

10. A textile product, characterized in that, The textile includes the micro-fluffy Lyocell fabric for home textiles as described in claim 9.

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