Knitted fabric, method for its production and home textile

Abstract

The present application provides a knitted fabric, a production method thereof and a household textile. The production method of the knitted fabric comprises the following steps: S1. knitting cellulose fiber yarn and elastic fiber yarn in a weft knitting manner to obtain a knitted fabric, wherein the mass percentage of the cellulose fiber in the knitted fabric is 45%-95%; S2. sequentially performing singeing, low-concentration alkali mercerization treatment, calendering preshrinking and continuous decatizing treatment on the knitted fabric to obtain the knitted fabric. During the low-concentration alkali mercerization treatment, the direct tension is 5N / m-20N / m, the speed is 20m / min-40m / min, the overfeed rate is 3%-10%, and the mercerizing liquid contains 80g / L-110g / L inorganic alkali. The present application can balance the softness, gloss, anti-pilling performance and structural stability of the fabric.

Description

Technical Field

[0001] This invention relates to the field of textile technology, and more particularly to knitted fabrics, their production methods, and home textiles. Background Technology

[0002] Knitted fabrics are made by interlocking yarns into loops using knitting needles. Knitted fabrics are widely used in clothing and other fields due to their excellent moisture absorption and breathability, soft texture, comfortable feel, and good elasticity.

[0003] As consumers increasingly demand higher levels of comfort and aesthetic quality from home textile products, knitted fabrics are gradually being applied to bedding.

[0004] However, knitted fabrics have the following drawbacks in practical applications: weak luster; easy to deform, loosen, and poor dimensional stability; prone to pilling and fuzzing; and unable to balance comfort and stability. Summary of the Invention

[0005] This invention provides knitted fabrics, methods for producing them, and home textiles to solve the aforementioned technical problems.

[0006] After analyzing the relevant technologies, the inventors discovered the following drawbacks in the practical application of knitted fabrics: (1) Weak luster. The knitted structure forms pores in the form of loops. In addition, the microscopic undulations on the fabric surface are large. Light is mainly diffused on the fabric surface, making it difficult to form a continuous mirror reflection effect similar to woven satin fabric. The overall visual texture of the fabric needs to be improved.

[0007] (2) Easily deformed, easily loosened, and with poor dimensional stability. In related technologies, to improve softness, knitted fabrics generally use low-modulus regenerated cellulose fibers (such as modal fibers, lyocell fibers, etc.) as raw materials. However, low-modulus cellulose fibers have insufficient structural support, and the knitted fabrics made from them are easily deformed, easily loosened, and have poor dimensional stability. Modulus and structural stability cannot be improved simultaneously. After long-term use and multiple washes, the fabric is prone to bulging, local collapse, and uneven shrinkage after washing.

[0008] (3) Prone to pilling. The loop structure of knitted fabrics is relatively loose, and repeated friction during wearing and use can easily cause pilling. Especially when the yarn twist is low or the yarn arrangement is loose, the fuzz on the yarn surface is more likely to be exposed and gradually form fuzz balls.

[0009] (4) It is impossible to balance softness and stability. To improve the softness and comfort of knitted fabrics, fabric density or yarn twist is often reduced. While this improves the initial hand feel, it weakens the fabric's structural stability, making it more prone to problems such as insufficient resilience, bulging, and deformation buildup. Conversely, increasing fabric density or twist to improve structural stability leads to a stiffer hand feel and reduced softness. In other words, current technology struggles to balance softness and stability.

[0010] (5) If not properly controlled during the dyeing, finishing, and post-treatment processes of knitted fabrics, excessive tension or uneven finishing effects can easily be introduced, disrupting the original balance of the knitted structure and exacerbating dimensional instability and surface unevenness. Existing technologies typically use liquid ammonia finishing to impart high gloss and dimensional stability to fabrics. However, liquid ammonia finishing is only suitable for fabrics with a finished width of 210cm or less, which is not suitable for home textile fabrics (the effective width of home textile fabrics is at least 240cm). Secondly, liquid ammonia finishing is costly and only applicable to pure cotton fabrics.

[0011] Existing technologies typically improve the luster and dimensional stability of knitted fabrics through tight alkaline mercerizing, high-tension stretching, or calendering. However, under these conditions, the knitted loops are forcibly stretched and fixed under tension, limiting the natural shrinkage and densification process of the knitted structure. While this can improve surface smoothness to some extent, the fabric surface lacks continuity due to the stretched loop structure, and light reflection remains predominantly diffuse, thus limiting the improvement in luster. Furthermore, high-tension finishing can easily lead to a stiff hand feel, reduced elasticity, and compromised softness in knitted fabrics, making it difficult to simultaneously achieve high luster, softness, and structural stability.

[0012] In summary, existing knitted bedding fabrics struggle to balance softness, luster, anti-pilling properties, and structural stability.

[0013] To achieve the above objectives, the technical solution of the present invention is as follows: This invention provides a method for producing knitted fabric, the method comprising the following steps: S1. Cellulose fiber yarn and elastic fiber yarn are knitted using a weft knitting method to obtain a knitted fabric, wherein the mass percentage of cellulose fiber in the knitted fabric is 45%-95%, preferably 70%-90%; S2. The knitted fabric is sequentially subjected to singeing, low-concentration loose alkali mercerizing, calendering pre-shrinking and continuous steaming to obtain the knitted fabric. During the low-concentration loose alkali mercerizing process, the linear tension is 5N / m-20N / m, preferably 5N / m-15N / m; the machine speed is 20m / min-40m / min, preferably 20m / min-30m / min; the overfeed rate is 3%-10%, preferably 5%-10%; and the mercerizing solution used contains 80g / L-110g / L of inorganic alkali, preferably 90g / L-110g / L of inorganic alkali. In one embodiment of the present invention, in step S2, the inorganic base includes sodium hydroxide or potassium hydroxide or a combination of both.

[0014] In one embodiment of the present invention, in step S1, the cellulose fiber yarn is a single-ply yarn or a double-ply yarn.

[0015] In one embodiment of the present invention, in step S1, if the cellulose fiber yarn is a single-ply yarn, the fineness of the cellulose fiber yarn is 40S-80S, preferably 60S-80S, and the twist direction is Z-twist; if the cellulose fiber yarn is a double-ply yarn, the fineness of the cellulose fiber yarn is 60S / 2-160S / 2, preferably 80S / 2-160S / 2, and the twist direction is S-twist.

[0016] In one embodiment of the present invention, in step S1, the twist coefficient of the cellulose fiber yarn is 360-420, preferably 370-390.

[0017] In one embodiment of the present invention, in step S1, if the cellulose fiber yarn includes natural fibers, the natural fibers are combed and then made into yarn using a compact spinning process.

[0018] In one embodiment of the present invention, in step S1, the fineness of the elastic fiber yarn is 20D-50D, preferably 30D-50D.

[0019] In one embodiment of the present invention, in step S1, during the knitting process, the number of needles is 32-36 needles / inch, preferably 34-36 needles / inch.

[0020] In one embodiment of the present invention, in step S1, the loop length of the knitted fabric is 20cm / 100 loops to 30cm / 100 loops, preferably 24cm / 100 loops to 30cm / 100 loops.

[0021] In one embodiment of the present invention, in step S1, the areal density of the knitted fabric is 180 g / m². 2 -240g / m 2 The preferred value is 185g / m 2 -240g / m 2 .

[0022] In one embodiment of the present invention, in step S2, the temperature of the mercerizing liquid is 25°C-30°C, preferably 28°C-30°C.

[0023] In one embodiment of the present invention, during step S2, the fabric feeding tension during the calendering and pre-shrinking process is 20N-100N, preferably 20-50N; the pressure of the rollers used is 8kg / cm. 2 -10kg / cm 2 The preferred value is 8.5 kg / cm². 2 -10kg / cm 2 .

[0024] In one embodiment of the present invention, in step S2, during the continuous steaming process, the steam temperature is 100℃-115℃, preferably 105℃-115℃; the vehicle speed is 5m / min-10m / min, preferably 6m / min-10m / min; and the steaming pressure is 0.5bar-2bar, preferably 1bar-2bar.

[0025] In one embodiment of the present invention, in step S2, after knitting and before singeing, the production method further includes the following steps: oxygen bleaching, washing, and drying.

[0026] In one embodiment of the present invention, in step S2, after the low-concentration loose alkali mercerizing treatment and before calendering and pre-shrinking, the production method further includes the following steps: acid neutralization of the knitted fabric, drying, and polishing.

[0027] The present invention also provides a knitted fabric prepared according to the method described above.

[0028] The present invention also provides a textile, which includes the knitted fabric described above.

[0029] The beneficial effects of this invention are: This invention achieves the transformation of the knitted loop structure from a loose state to a dense and stable state through a continuous path of "low-tension swelling - stress release - moist heat setting", as detailed below: By using a weft knitting structure composed of cellulose fibers and elastic fibers, combined with multi-stage low-tension finishing processes such as singeing, low-concentration loose alkali mercerizing, calendering pre-shrinking, and continuous steaming, the knitted fabric undergoes controllable swelling, stress release, and structural rearrangement under low external force conditions, thereby forming a dense and stable loop structure.

[0030] Among them, singeing removes the fuzz from the fabric surface, making the fabric surface smoother and providing a more continuous base interface for subsequent light reflection.

[0031] Low-concentration, loose-alkali mercerizing treatment causes cellulose fibers to swell and reconstruct their semi-crystalline structure, making the internal structure of the fibers more compact and promoting the fabric to shrink and become denser under low tension, thereby improving the fabric surface continuity and the ability to reflect light in a directional manner.

[0032] Calendering and pre-shrinking treatment releases residual stress in the fabric in advance and stabilizes the fabric's dimensional shrinkage behavior, reducing the probability of structural re-deformation during subsequent processing and use, thereby maintaining the fabric's smoothness.

[0033] Continuous steaming further eliminates internal stress in the coil structure under humid and hot conditions, making the fabric structure more even and uniform, and reducing the degree of fiber exposure, thereby reducing the tendency of friction-induced pilling.

[0034] Based on the synergistic regulatory effect of the above processes on the fabric structure, the fabric is transformed from the original loose loop structure into a relatively dense and stable structure, thereby achieving a synergistic improvement in luster, anti-pilling performance and dimensional stability while ensuring softness. Detailed Implementation

[0035] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] One embodiment of the present invention provides a method for producing knitted fabric, comprising the following steps: S1. Cellulose fiber yarn and elastic fiber yarn are knitted using a weft knitting method to obtain a knitted fabric. The mass percentage of cellulose fiber in the knitted fabric is 45%-95%, preferably 70%-90%. S2. The knitted fabric is sequentially subjected to singeing, low-concentration loose alkali mercerizing, calendering and pre-shrinking and continuous steaming to obtain the knitted fabric. During the low-concentration loose-alkali mercerizing process, the linear tension is 5 N / m-20 N / m, preferably 5 N / m-15 N / m; the machine speed is 20 m / min-40 m / min, preferably 20 m / min-30 m / min; the overfeed rate is 3%-10%, preferably 5%-10%; and the mercerizing solution used contains 80 g / L-110 g / L of inorganic alkali, preferably 90 g / L-110 g / L. The inorganic alkali includes sodium hydroxide or potassium hydroxide, or a combination of both.

[0037] In this invention, cellulose fibers can include, for example, modal fibers, lyocell fibers, cotton fibers, etc. Elastic fibers include at least one of polyurethane elastic fibers (spandex), polyether ester elastic fibers, polyolefin elastic fibers, and elastic polyester fibers.

[0038] In this invention, cellulose fibers, as the main component of knitted fabric, provide the foundation for structural rearrangement during the subsequent low-concentration loose alkali mercerizing process. Elastic fibers impart firmness and resilience to the fabric, preventing bulging. Singeing removes surface fuzz from the knitted fabric, reduces surface hairiness, improves surface smoothness, and makes the fabric smoother and flatter, facilitating specular reflection of light. During the low-concentration loose alkali mercerizing process, a mercerizing solution containing 80g / L-110g / L of inorganic alkali is used. The fabric is treated under conditions of a longitudinal tension of 5N / m-20N / m, a machine speed of 20m / min-30m / min, and an overfeed rate of 3%-10%. This causes the cellulose fibers in the knitted fabric to swell, resulting in structural rearrangement (the diameter of the swollen cellulose fibers increases, the semi-crystalline region transforms into an amorphous region, and the dyeing depth is significantly enhanced). This makes the fabric surface shrink more tightly, improves specular reflection of light, enhances the overall luster and visual effect of the fabric, and improves the fabric's resistance to pilling. In other words, using a mercerizing solution containing 80g / L-110g / L of inorganic alkali to treat the fabric under conditions of a linear tension of 5N / m-20N / m, a machine speed of 20m / min-30m / min, and an overfeed rate of 3%-10% can avoid the stiffness and decreased luster problems caused by tension-free mercerizing. This results in a smoother fabric surface, improved specular reflection, and enhanced overall luster and visual effect. Calendering and pre-shrinking treatment stabilizes the fabric's dimensional structure, improves dimensional stability, and prevents negative impacts on luster caused by changes in fabric dimensional structure. During continuous steaming, under the action of humid heat and steaming pressure, the internal torque and tension accumulated in the fabric are effectively released. After cooling, the new loop shape is fixed. In other words, during continuous steaming, the fabric undergoes loop rearrangement under humid heat conditions, the micro-undulations on the surface are "flattened," the surface smoothness and density increase, and light reflection changes from diffuse reflection to directional reflection (i.e., specular reflection), enhancing the luster.

[0039] In this application, cellulose fibers, as the main component of the knitted fabric, provide the basis for structural rearrangement during the subsequent low-concentration loose alkali mercerizing process. Elastic fibers impart firmness and resilience to the fabric, preventing bulging. Singeing makes the fabric smoother and more even, facilitating specular reflection of light. Using a mercerizing solution containing 80g / L-110g / L inorganic alkali, under conditions of a longitudinal tension of 5N / m-20N / m, a machine speed of 20m / min-30m / min, and an overfeed rate of 3%-10%, the knitted fabric undergoes low-concentration loose alkali mercerizing. During this process, cellulose fibers swell, and structural rearrangement occurs in the semi-crystalline regions, improving the dyeing depth of the cellulose fibers. Darker fabrics better reflect the fabric's high gloss. Simultaneously, the loose low tension causes the fabric to shrink, forming a dense surface, thereby improving the fabric's gloss and texture. This enhances the overall luster and visual effect of the fabric and improves its resistance to pilling. Calendering and pre-shrinking treatment allows fibers to shrink back in advance and stabilize the structure, preventing damage to the fabric surface smoothness caused by later fabric size changes, and thus avoiding negative impacts on the luster effect due to changes in fabric size and structure. Continuous steaming treatment, through short-term setting under humid and hot conditions, eliminates internal stress in the knitted loop structure, making it smoother and denser, improving the fabric's looseness, and transforming the fabric's light reflection ability from diffuse reflection to directional reflection (i.e., specular reflection), enhancing the luster and thus improving the overall visual texture of the fabric. In summary, this application, through the combination of the above processes, effectively balances the fabric's softness, luster, anti-pilling performance, and structural stability.

[0040] In one embodiment of the present invention, the fineness of the elastic fiber yarn is 20D-50D, preferably 30D-50D.

[0041] The twist coefficient of the cellulose fiber yarn is 360-420, preferably 370-410. The cellulose fiber yarn can be a single-ply or double-ply yarn. If the cellulose fiber yarn is a single-ply yarn, its fineness is 40S-80S, preferably 60S-80S, and the twist direction is Z-twist. If the cellulose fiber yarn is a double-ply yarn, its fineness is 60S / 2-160S / 2, preferably 80S / 2-160S / 2, and the twist direction is S-twist. To reduce hairiness and further improve luster, if the cellulose fiber yarn includes natural fibers, the natural fibers are combed and then spun using a compact spinning process to produce the yarn. During the combing process, the feed length is 4.0mm-5.9mm, preferably 4.3mm-5.9mm, and more preferably 4.3mm-4.7mm; the combing speed is 400 nips / min-600 nips / min, preferably 400 nips / min-550 nips / min, and more preferably 400 nips / min-450 nips / min; the cotton feeding method is either forward feeding or backward feeding, and to improve yarn evenness, forward feeding is preferred. Cotton; the feed rate of cotton rolls is 60g / m-80g / m, preferably 75g / m-80g / m; the cotton drop separation distance is 7mm-16mm, preferably 7.5mm-13mm; the cylinder used is selected from i700 or i500 cylinders (this cylinder is a combing cylinder designed for long-staple cotton in the combing process); the cotton web traction force range is: the draw ratio is 1.02-1.19, preferably 1.08-1.15, more preferably 1.10-1.12. During compact spinning, the roving weight is 2g / 10m-12g / 10m, preferably 4.5g / 10m-7.5g / 10m; the yarn weight is 6g / 1000m-15g / 1000m, preferably 10g / 1000m-14g / 1000m; the twist is 100-1500, preferably 300-1500; the back zone draft ratio is 1.04-1.25, preferably 1.15-1.25; the spindle speed is 1000r / min-25000r / min, preferably 15000r / min-18000r / min. Due to spindle specifications, the spindle speed can be set at a lower speed when using a small-scale spinning machine. During knitting, the needle count is 32-36 needles / inch, preferably 34-36 needles / inch. The loop length of the knitted fabric is 20cm / 100 turns to 30cm / 100 turns, preferably 24cm / 100 turns to 30cm / 100 turns. The areal density of the knitted fabric is 180g / m². 2 -240g / m 2 The preferred value is 185g / m 2 -240g / m 2Knitted fabrics can be double-knitted or single-knitted; in double-knitted fabrics, both sides have a cylindrical loop structure, while in single-knitted fabrics, one side has a cylindrical loop and the other side has a curved loop. Single-knitted fabrics use a polyester-coated weave, allowing different fibers to be distributed on both sides of the fabric.

[0042] In this invention, by setting the raw material of the knitted fabric to include elastic fiber yarns, the fabric can be given tightness and resilience. The cellulose fiber yarns include long-staple cotton; by combing the long-staple cotton and then using a compact spinning process to produce yarn, the cohesion can be improved, the risk of pilling and fuzzing can be reduced, and the structural stability of the fabric can be enhanced. By adjusting the loop length (20cm / 100 turns - 30cm / 100 turns) and the areal density of the knitted fabric (180g / m²), the fabric can be made more flexible and resilient. 2 -240g / m 2 This method balances fabric softness and structural stability (higher loop length and lower areal density help improve fabric softness, while shorter loop length and higher areal density help improve structural firmness and resistance to deformation). By adjusting the gauge (32-36 stitches / inch), the distribution of internal stress in the knitted fabric can be adjusted, thus balancing fabric structural stability and softness (smaller gauge helps enhance structural stability, while larger gauge helps enhance softness).

[0043] In one embodiment of the present invention, in step S2, during the singeing process, the flame temperature is 800℃-980℃, preferably 850℃-900℃; the fabric speed is 20m / min-30m / min, preferably 20m / min-30m / min. The knitted fabric is singed once on each side, and the singeing method is cutting and burning.

[0044] In one embodiment of the present invention, in step S2, the temperature of the mercerizing solution is 25°C-30°C, preferably 28°C-30°C. The inorganic base includes sodium hydroxide or potassium hydroxide or a combination of both.

[0045] In one embodiment of the present invention, in step S2, after knitting and before singeing, the method for producing knitted fabric further includes the following steps: oxygen bleaching, washing and drying.

[0046] In one embodiment of the present invention, step S2, oxygen bleaching, includes: immersing the knitted fabric in a treatment solution containing 5 g / L-8 g / L inorganic alkali and 7.5 g / L-9.5 g / L bleaching agent, with a bath ratio of 1:15-20, preferably 1:16-20. The treatment solution is heated to 80℃-90℃, preferably 85℃-90℃; and kept at 80℃-90℃ for 15 min-25 min. During this process, the inorganic alkali hydrolyzes the grease adhering to the surface of the cellulose fibers to remove impurities such as grease from the surface of the cellulose fibers, providing a basis for subsequent hydrogen peroxide treatment of the knitted fabric. Subsequently, hydrogen peroxide is added to the treatment solution, with a final concentration of 4 g / L-6 g / L, and the concentration of the inorganic alkali is adjusted to 4 g / L-6 g / L, and the mixture is kept at 80℃-90℃ for another 15 min-25 min. Subsequently, organic acid and dehydrogenase are added to the third treatment solution. The final concentration of organic acid is 1.5 g / L-2.5 g / L, and the final concentration of dehydrogenase is 0.15 g / L-0.35 g / L. The solution is then kept at 40℃-50℃ for 15 min-25 min. The inorganic alkali includes sodium hydroxide or potassium hydroxide, or a combination of both. The bleaching agent includes sodium dithionite (commonly known as sodium hydrosulfite). Washing includes washing the knitted fabric with warm water at 75℃-85℃ for 10 min-15 min; preferably, washing the knitted fabric with warm water at 80℃-85℃ for 12 min-15 min. During the drying process, the temperature is 150℃-170℃, preferably 155℃-170℃; the machine speed is 10 m / min-15 m / min, preferably 12 m / min-15 m / min.

[0047] In one embodiment of the present invention, in step S2, after low-concentration loose alkaline mercerizing and before calendering and pre-shrinking, the production method of the knitted fabric further includes the following steps: acid neutralization of the knitted fabric, drying, and then polishing. Acid neutralization includes: padding the knitted fabric with an organic acid solution to adjust the pH of the knitted fabric to 6.5-7.0, preferably 6.8-7.0. The organic acid can be citric acid, acetic acid, etc. During the drying process, the temperature is 150℃-170℃, preferably 155℃-170℃; the machine speed is 10m / min-15m / min, preferably 12m / min-15m / min. Polishing includes: immersing the knitted fabric in a treatment solution with a pH of 6.0-6.5, preferably 6.2-6.5, for bio-enzymatic polishing. The liquor ratio is 1:20-30, preferably 1:25-30. Preferably, the treatment solution also contains dye. The treatment solution is heated to 35℃-45℃, preferably 38℃-45℃. Then, a bio-enzyme is added to the treatment solution, and the temperature is raised to 50℃-65℃, preferably 55℃-65℃; this temperature is then maintained at 50℃-65℃ for 40-60 minutes. The dye concentration in the treatment solution can be adjusted according to the target dyeing color. The mass ratio of the bio-enzyme to the knitted fabric is 0.03-0.15:100, preferably 0.05-0.15:100. The dye includes monochlorotriazine and vinyl sulfone bireactive dyes (i.e., KE-type reactive dyes). The bio-enzyme includes neutral cellulase or a complex polishing enzyme or a combination of both. The composite polishing enzyme includes an endonuclease (EG), an exonuclease (CBH), and a β-glucosidase (BG). The mass ratio of the endonuclease (EG), exonuclease (CBH), and β-glucosidase (BG) is 0.5-1.5:2-3:0.5-1.5, preferably 0.8-1.2:2-3:0.8-1.2. The first treatment solution also includes a leveling agent, a penetrant, and a chelating dispersant. In the first treatment solution, the concentration of the leveling agent is 0.5 g / L-3 g / L, preferably 1 g / L-2 g / L; the concentration of the penetrant is 0.5 g / L-4 g / L, preferably 1 g / L-2 g / L; and the concentration of the chelating dispersant is 0.5 g / L-3 g / L, preferably 1 g / L-2 g / L. The leveling agent includes at least one of Pingpingjia O, leveling agent AN, and polyoxyethylene ethers. The penetrant includes at least one of JFC penetrant, rapid penetrant T, and fatty alcohol polyoxyethylene ether penetrants. The chelating dispersant includes at least one of ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), and polycarboxylic acid dispersants. Then, the dyeing accelerator is added in batches, with an interval of 10-15 minutes between each addition, and the amount added each time is the same. Subsequently, an inorganic alkali is added to the treatment solution in batches.The first addition of inorganic alkali is 1 / 3 of the total amount. After the first addition, the mixture is kept at 40℃-50℃ for 8-12 minutes. The remaining inorganic alkali is then added, and the temperature is raised to 55℃-65℃, and kept at 55℃-65℃ for 40-60 minutes. Subsequently, organic acid is added to a final concentration of 0.5 g / L-0.9 g / L, preferably 0.6 g / L-0.9 g / L; and kept at 40℃-50℃ for 20-30 minutes. Following this, the mixture is opened, washed with water, dried again, stretched, and dried again. The final concentration of the dyeing accelerator (referring to the concentration of the dyeing accelerator in the first treatment solution after all dyeing accelerators have been added) is 50 g-70 g / L, preferably 60 g-70 g / L. The dyeing accelerator includes sodium sulfate (commonly known as Glauber's salt) or sodium chloride, or a combination of both. The organic acid includes acetic acid or citric acid, or a combination of both. The inorganic base includes sodium hydroxide or potassium hydroxide or a combination of both. The final concentration of the inorganic base (referring to the concentration of the inorganic base in treatment solution one after all inorganic bases have been added) is 15 g-30 g / L, preferably 20 g-30 g / L.

[0048] In this invention, dyeing and polishing are performed simultaneously. The bio-enzymes remove surface fuzz from the fabric while simultaneously adsorbing and dyeing the dye. A dyeing accelerator promotes the formation of stable covalent bonds between the reactive dye and the fiber, achieving efficient color fixation. Meanwhile, an inorganic alkali deactivates the bio-enzymes, preventing excessive polishing that could damage the fabric's mechanical strength. Furthermore, the simultaneous dyeing and polishing process removes fine fuzz from the surface of high-count knitted fabrics during the dyeing process, reducing diffuse reflection and thus improving the fabric's luster, color uniformity, and overall appearance.

[0049] In this invention, after low-concentration loose alkali mercerizing and before calendering and pre-shrinking, the knitted fabric is acid-treated, dried, and then polished. This process removes residual alkaline substances from the mercerizing process and stabilizes the fiber swelling structure. It also effectively reduces fuzz and messy fibers on the fabric surface, thereby improving the smoothness, luster uniformity, and soft, delicate feel of the knitted fabric.

[0050] In one embodiment of the present invention, step S2, open-width washing includes: washing the knitted fabric with a soap solution at a temperature of 85℃-95℃ for 10-15 minutes, followed by washing with hot water at 75℃-85℃ for 10-20 minutes.

[0051] In one embodiment of the present invention, in step S2, during the second drying process, the temperature is 150℃-170℃, preferably 155℃-170℃; the vehicle speed is 10m / min-15m / min, preferably 12m / min-15m / min.

[0052] In one embodiment of the present invention, step S2, the stretching and setting includes: padding the knitted fabric with a treatment solution containing 40g / L-80g / L softener and 20g / L-40g / L hand-feeling agent, with a pH of 5-6, at a machine speed of 8m / min-10m / min, preferably 8.5m / min-10m / min; the liquid-holding rate is 60%-80%, preferably 65%-80%. The softener includes at least one of amino silicone oil softener, polyether-modified silicone softener, and hydrophilic silicone softener. The hand-feeling agent includes at least one of polyurethane elastic hand-feeling finishing agent, polyether-type elastic finishing agent, and elastomeric resin finishing agent.

[0053] In one embodiment of the present invention, in step S2, during the re-drying process, the temperature is 150℃-170℃, preferably 155℃-170℃; the vehicle speed is 10m / min-15m / min, preferably 12m / min-15m / min.

[0054] In one embodiment of the present invention, during step S2, the fabric feeding tension during the calendering and pre-shrinking process is 20N-100N, preferably 30N-50N; the pressure of the rollers used is 8kg / cm. 2 -10kg / cm 2 The preferred value is 8.5 kg / cm². 2 -10kg / cm 2 .

[0055] In one embodiment of the present invention, in step S2, during the continuous steaming process, the steam temperature is 100℃-115℃, preferably 105℃-115℃; the vehicle speed is 5m / min-10m / min, preferably 6m / min-10m / min. m / min; the steaming pressure is 0.5 bar to 2 bar, preferably 1 bar to 2 bar.

[0056] In existing technologies, the cortex structure of cellulose fibers such as Modal is relatively dense, making it difficult for dye molecules to diffuse into the fiber interior, resulting in low dye uptake rates when dyeing dark colors. To address this issue, this invention utilizes a low-concentration, loose-alkali mercerizing treatment to reduce the crystallinity of cellulose fibers, increase amorphous regions, and improve the fiber's adsorption of dyes, thereby enhancing the dyeing depth. The dyeing process employs a segmented control process, adding dyeing accelerators in batches, which reduces the instantaneous dye uptake rate, improves the uniformity of dye diffusion within the fiber, reduces localized pre-dyeing and color bleeding, and thus improves the uniformity and dye fixation rate of dark color dyeing, as well as increasing the dyeing depth. In summary, this application enables deeper and fuller dark color dyeing.

[0057] This invention uses a calendering and pre-shrinking machine to perform simultaneous mechanical and thermal-humidification treatment on knitted fabrics. By controlling the fabric feeding tension and roller pressure, the fabric structure can be stabilized, thereby eliminating internal stress, controlling shrinkage rate, improving dimensional stability, enhancing fabric firmness, and achieving an anti-loosening effect.

[0058] To achieve mass production, the production method of knitted fabric after knitting and before oxygen bleaching also includes the following steps: turning and slitting the knitted fabric. Turning includes turning the knitted fabric over and sewing the ends. Slitting includes cutting the turned-over knitted fabric longitudinally and flattening it into a flat width.

[0059] Another embodiment of the present invention also provides a knitted fabric prepared according to the method described above.

[0060] Another embodiment of the present invention provides a textile fabric comprising the knitted fabric described above.

[0061] It should be noted that, in this invention, textiles can include items such as bed sheets, fitted sheets, and duvet covers.

[0062] Furthermore, the term "and / or" in this application is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. 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.

[0063] Example 1 A method for producing knitted fabric, the specific steps of which are as follows: S1 Knitting: Using a weft knitting method, 60S modal single-ply yarn (the modal single-ply yarn is cone yarn with a twist direction of Z and a twist coefficient of 360) and 20D antibacterial spandex yarn (commercially available) are knitted on a circular knitting machine. The needle count is 36 stitches / inch, resulting in a loop length of 20cm / 100 loops and a surface density of 232g / m². 2 The double-sided knitted fabric (in which the modal fiber content is 90% by mass, the first and second sides of the double-sided knitted fabric are both loop cylinders, that is, the top and bottom surfaces of the double-sided knitted fabric are both loop cylinders as the apparent structure). S2.1 Turning over seam: Turning over the double-sided knitted fabric and sewing the seam end; S2.2 Cutting: Cut the double-sided knitted fabric longitudinally after turning and flatten it into a flat shape; S2.3 Oxygen bleaching: Add sodium hydroxide and sodium hydrosulfite to deionized water and stir evenly to obtain a treatment solution with a sodium hydroxide concentration of 5 g / L and a sodium hydrosulfite concentration of 7.5 g / L. The split double-sided knitted fabric was immersed in treatment solution three with a bath ratio of 1:15, and the treatment solution three was heated to 85°C and kept at 85°C for 20 minutes. Then, hydrogen peroxide was added to the treatment solution three, with a final concentration of 4 g / L. The concentration of sodium hydroxide was adjusted to 4 g / L, and the solution was kept at 85°C for 20 min. Subsequently, acetic acid and dehydrogenase (i.e., hydrogen peroxide decomposing enzyme) were added to the third treatment solution to make the final concentration of acetic acid 1.5 g / L and the final concentration of dehydrogenase 0.15 g / L, and the solution was kept at 45°C for 20 min. S2.4 Washing: Wash the oxygen-bleached double-sided knitted fabric with warm water at 75℃ for 10 minutes; S2.5 Drying: Dry the washed double-sided knitted fabric at a temperature of 150℃ and a speed of 10m / min; S2.6 Singeing: The top and bottom surfaces (i.e., front and back) of the dried double-sided knitted fabric are singed once each. During the singeing process, the flame temperature is 800℃, the fabric speed is 20m / min, and the singeing method is cutting and burning. S2.7 Low-concentration loose-alkali mercerizing treatment: Add sodium hydroxide to deionized water and stir evenly to obtain a mercerizing solution with a sodium hydroxide concentration of 80 g / L; Under the conditions of a straight tension of 5 N / m, an overfeed rate of 3%, and a machine speed of 20 m / min, a low-concentration loose alkali mercerizing treatment was carried out on the singed double-sided knitted fabric using mercerizing liquid at a temperature of 25℃. S2.8 pH adjustment: The double-sided knitted fabric treated with low-concentration loose alkali was impregnated with citric acid solution to adjust the pH of the knitted fabric to 6.5. S2.9 Re-drying: The pH-adjusted double-sided knitted fabric is dried again at a temperature of 150℃ and a speed of 10m / min. S2.10 Simultaneous dyeing and polishing treatment: Add KE reactive dyes CE-N Yellow, LF-2B Red, C-BRF Blue, and leveling agent to deionized water. Mix 3001A, penetrant JFC, and chelating dispersant XH-3304 until homogeneous to obtain treatment solution one with a concentration of 1.0 g / L for leveling agent 3001A, 1.0 g / L for penetrant JFC, 2 g / L for chelating dispersant XH-3304, and 1.0 g / L for leveling agent 3001A. Add acetic acid to treatment solution one. Adjust the pH to 6.0; The double-sided knitted fabric, after being dried again, was immersed in treatment solution one with a bath ratio of 1:20; the mass ratio of CE-N yellow to double-sided knitted fabric was 0.408:100, the mass ratio of LF-2B red to double-sided knitted fabric was 3.96:100, and the mass ratio of C-BRF blue to double-sided knitted fabric was 0.432:100. Heat the treatment solution to 40°C; Subsequently, neutral polishing enzyme D400 was added to the first treatment solution, with the mass ratio of neutral polishing enzyme D400 to double-sided knitted fabric being 0.05:100. Then, the treatment solution is heated to 50°C and kept at 50°C for 60 minutes. Subsequently, sodium sulfate was added in three separate additions, with a 10-minute interval between each addition. The amount added each time was the same, which was 1 / 3 of the total amount of sodium sulfate added each time. The total amount of sodium sulfate was such that the final concentration of sodium sulfate in the first treatment solution was 50 g / L. Next, sodium hydroxide was added to the treatment solution in two batches. The amount of sodium hydroxide added in the first batch was 1 / 3 of the total amount. After the first addition, the solution was kept at 50°C for 10 minutes. The remaining sodium hydroxide was then added, and the temperature was raised to 60°C and kept at 60°C for 60 minutes. The total amount of sodium hydroxide was used to make the final concentration of sodium hydroxide in the treatment solution 1 15 g / L. Then, acetic acid was added to bring the final concentration of acetic acid to 0.5 g / L, and the mixture was kept at 40°C for 30 min. S2.11 Open-width washing: The double-sided knitted fabric after simultaneous dyeing and polishing is washed for 10 minutes with a soaping solution at a temperature of 85℃ (the soaping solution is prepared by adding soaping agent EPS-5G to deionized water, with a mass ratio of soaping agent EPS-5G to deionized water of 1:2, and stirring evenly to obtain the soaping solution). The mass ratio of soaping agent EPS-5G to double-sided knitted fabric is 1:100. Then, wash the double-sided knitted fabric with 75℃ hot water for 10 minutes; S2.12 Re-drying: The double-sided knitted fabric after open-width washing is dried again at a temperature of 150℃ and a speed of 15m / min. S2.13 Stretching and setting: Add softener 6461A and hand feel agent PUR ELAST to deionized water, stir evenly to obtain a liquid with a mass concentration of softener 6461A of 40 g / L and a mass concentration of hand feel agent PUR ELAST of 20 g / L; Add acetic acid to the liquid to adjust the pH to 5, thus obtaining treatment solution two; The double-sided knitted fabric, after being dried again, was subjected to padding treatment with treatment solution two at a speed of 8 m / min and a liquid retention rate of 60%. S2.14 Re-drying: The double-sided knitted fabric after stretching and setting is dried again at a temperature of 150℃ and a speed of 15m / min. S2.15 Calendering and Pre-shrinking: The double-sided knitted fabric is calendered and pre-shrinked after being dried again using a calendering and pre-shrinking machine. The fabric tension is 50N and the roller pressure is 8kg / cm. 2 ; S2.16 Continuous steaming treatment: The double-sided knitted fabric after calendering and pre-shrinking is continuously steamed using a continuous steaming machine. The steam temperature is 115℃, the machine speed is 10m / min, and the steaming pressure is 0.5bar to obtain the knitted fabric.

[0064] Example 2 A method for producing knitted fabric, the specific steps of which are as follows: S1.1 Combing: The long-staple cotton fibers are combed using a combing machine with a feed length of 4.0 mm, a combing speed of 400 nips / min, a forward feeding method, a feed lap weight of 60 g / m, and a drop separation distance of 7 mm. The cylinder used is selected from Ri-Q-Comb i500 flex cylinder with a draw ratio of 1.02, resulting in a combed cotton sliver. S1.2 Compact Spinning: Lyocell fiber and combed cotton sliver are blended into yarn at a mass ratio of 70:30 using compact spinning equipment. The roving weight is 12g / 10m, the yarn weight is 15g / 1000m, the back zone draft ratio is 1.24, and the spindle speed is 1000r / min, resulting in a double-ply yarn (S-twist) with a fineness of 60S / 2 and a twist coefficient of 400. S1.3 Knitting: Double-ply yarn and commercially available 20D antibacterial spandex yarn are knitted on a circular knitting machine using a weft knitting method. The mass ratio of antibacterial spandex yarn to lyocell fiber is 1:9, the needle count is 36 stitches / inch, resulting in a loop length of 24cm / 100 loops and a areal density of 180g / m². 2 Double-sided knitted fabric (i.e., the first and second sides of the double-sided knitted fabric are both loop cylinders, that is, the top and bottom surfaces of the double-sided knitted fabric are both apparent structures of loop cylinders). S2.1 Turning over seam: Turning over the double-sided knitted fabric and sewing the seam end; S2.2 Cutting: Cut the double-sided knitted fabric longitudinally after turning and flatten it into a flat shape; S2.3 Oxygen bleaching: Add sodium hydroxide and sodium hydrosulfite to deionized water and stir evenly to obtain a treatment solution with a sodium hydroxide concentration of 8 g / L and a sodium hydrosulfite concentration of 9.5 g / L. The split double-sided knitted fabric was immersed in treatment solution three with a bath ratio of 1:20, and the treatment solution three was heated to 85°C and kept at 85°C for 20 minutes. Then, hydrogen peroxide was added to the treatment solution three, with a final concentration of 6 g / L. The concentration of sodium hydroxide was adjusted to 6 g / L, and the solution was kept at 85°C for 20 min. Subsequently, acetic acid and dehydrogenase (i.e., hydrogen peroxide decomposing enzyme) were added to the third treatment solution to make the final concentration of acetic acid 1.5 g / L and the final concentration of dehydrogenase 0.15 g / L, and the solution was kept at 45°C for 20 min. S2.4 Washing: Wash the oxygen-bleached double-sided knitted fabric with warm water at 85℃ for 15 minutes; S2.5 Drying: Dry the washed double-sided knitted fabric at a temperature of 170℃ and a speed of 10m / min; S2.6 Singeing: The top and bottom surfaces (i.e., the front and back sides) of the dried double-sided knitted fabric are singed once each. During the singeing process, the flame temperature is 980℃, the fabric speed is 20m / min, and the singeing method is cutting and burning. S2.7 Low-concentration loose-alkali mercerizing treatment: Add sodium hydroxide to deionized water and stir evenly to obtain a mercerizing solution with a sodium hydroxide concentration of 110 g / L. Under the conditions of a straight tension of 20 N / m, an overfeed rate of 10%, and a machine speed of 30 m / min, a low-concentration loose alkali mercerizing treatment was carried out on the singed double-sided knitted fabric using mercerizing liquid at a temperature of 30℃. S2.8 pH adjustment: The double-sided knitted fabric after low-concentration loose alkali mercerizing treatment was impregnated with citric acid solution to adjust the pH of the knitted fabric to 7.0. S2.9 Re-drying: The pH-adjusted double-sided knitted fabric is dried again at a temperature of 170℃ and a speed of 15m / min. S2.10 Simultaneous dyeing and polishing treatment: Add KE reactive dyes CE-N Yellow, LF-2B Red, C-BRF Blue, and leveling agent to deionized water. Mix 3001A, penetrant JFC, and chelating dispersant XH-3304 until homogeneous to obtain treatment solution one with a concentration of 1.0 g / L for leveling agent 3001A, 1.0 g / L for penetrant JFC, 2 g / L for chelating dispersant XH-3304, and 1.0 g / L for leveling agent 3001A. Add acetic acid to treatment solution one. Adjust the pH to 6.5; The double-sided knitted fabric, after being dried again, was immersed in treatment solution one with a liquor ratio of 1:30; the mass ratio of CE-N yellow to double-sided knitted fabric was 0.408:100, the mass ratio of LF-2B red to double-sided knitted fabric was 3.96:100, and the mass ratio of C-BRF blue to double-sided knitted fabric was 0.432:100. Heat the treatment solution to 40°C; Subsequently, neutral polishing enzyme D400 was added to the first treatment solution, with the mass ratio of neutral polishing enzyme D400 to double-sided knitted fabric being 0.05:100. Then, the treatment solution is heated to 50°C and kept at 50°C for 60 minutes. Subsequently, sodium sulfate was added in three separate additions, with a 10-minute interval between each addition. The amount added each time was the same, which was 1 / 3 of the total amount of sodium sulfate added each time. The total amount of sodium sulfate was such that the final concentration of sodium sulfate in the first treatment solution was 50 g / L. Next, sodium hydroxide was added to the treatment solution in two batches. The amount of sodium hydroxide added in the first batch was 1 / 3 of the total amount. After the first addition, the solution was kept at 50°C for 12 minutes. The remaining sodium hydroxide was then added, and the temperature was raised to 60°C and kept at 60°C for 60 minutes. The total amount of sodium hydroxide was used to make the final concentration of sodium hydroxide in the treatment solution 1 15 g / L. Then, acetic acid was added to bring the final concentration of acetic acid to 0.5 g / L, and the mixture was kept at 40°C for 30 min. S2.11 The double-sided knitted fabric after simultaneous dyeing and polishing is soaped for 15 minutes using a soaping solution at a temperature of 95℃ (the soaping solution is prepared by adding soaping agent EPS-5G to deionized water, with a mass ratio of soaping agent EPS-5G to deionized water of 1:2, and stirring evenly to obtain the soaping solution). The mass ratio of soaping agent EPS-5G to double-sided knitted fabric is 1:100. Then, wash the double-sided knitted fabric with 85℃ hot water for 15 minutes; S2.12 Re-drying: The double-sided knitted fabric after open-width washing is dried again at a temperature of 150℃ and a speed of 15m / min. S2.13 Stretching and setting: Add softener 6461A and hand feel agent PUR ELAST to deionized water, stir evenly to obtain a liquid with a mass concentration of softener 6461A of 40 g / L and a mass concentration of hand feel agent PUR ELAST of 20 g / L; Add acetic acid to the liquid to adjust the pH to 5, thus obtaining treatment solution two; The double-sided knitted fabric, after being dried again, was subjected to padding treatment with treatment solution two at a speed of 8 m / min and a liquid retention rate of 60%. S2.14 Re-drying: The double-sided knitted fabric after stretching and setting is dried again at a temperature of 150℃ and a speed of 15m / min. S2.15 Calendering and Pre-shrinking: The double-sided knitted fabric is calendered and pre-shrinked after being dried again using a calendering and pre-shrinking machine. The fabric tension is 100N and the roller pressure is 10kg / cm. 2 ; S2.16 Continuous steaming treatment: The double-sided knitted fabric after calendering and pre-shrinking is continuously steamed using a continuous steaming machine. The steam temperature is 105℃, the machine speed is 8m / min, and the steaming pressure is 1.0 bar to obtain the knitted fabric.

[0065] Example 3 A method for producing knitted fabric, the specific steps of which are as follows: S1.1 Combing: The long-staple cotton fibers are combed using a combing machine with a feed length of 4.5mm, a combing speed of 600 nips / min, a forward feeding method, a feed lap weight of 75 / m, and a drop separation distance of 16mm. The cylinder used is selected from Ri-Q-Comb i700 flex cylinder with a draft ratio of 1.19, resulting in a combed cotton sliver. S1.2 Compact Spinning: Lyocell fiber and combed cotton sliver are blended into yarn at a mass ratio of 46:45 using compact spinning equipment. The roving weight is 12g / 10m, the yarn weight is 15g / 1000m, the back zone draft ratio is 1.1, and the spindle speed is 25000r / min, resulting in a blended ply yarn (S-twist) with a fineness of 120S / 2 ply and a twist coefficient of 420. S1.3 Knitting: The blended single yarn and 30D antibacterial spandex yarn (commercially available) are knitted on a circular knitting machine using a weft knitting method. The mass ratio of antibacterial spandex yarn to lyocell fiber is 9.0:46, the needle count is 40 stitches / inch, resulting in a loop length of 20.5cm / 100 loops and a areal density of 220g / m². 2 The double-sided knitted fabric (both the first and second sides of the double-sided knitted fabric are loop cylinders, that is, the top and bottom surfaces of the double-sided knitted fabric are loop cylinders). S2.1 Turning over seam: Turning over the double-sided knitted fabric and sewing the seam end; S2.2 Cutting: Cut the double-sided knitted fabric longitudinally after turning and flatten it into a flat shape; S2.3 Oxygen bleaching: Add sodium hydroxide and sodium hydrosulfite to deionized water and stir evenly to obtain a treatment solution with a sodium hydroxide concentration of 5 g / L and a sodium hydrosulfite concentration of 7.5 g / L. The split double-sided knitted fabric was immersed in treatment solution three with a bath ratio of 1:20, and the treatment solution three was heated to 85°C and kept at 85°C for 20 minutes. Then, hydrogen peroxide was added to the treatment solution three, with a final concentration of 6 g / L. The concentration of sodium hydroxide was adjusted to 6 g / L, and the solution was kept at 85°C for 20 min. Subsequently, acetic acid and dehydrogenase (i.e., hydrogen peroxide decomposing enzyme) were added to the third treatment solution to make the final concentration of acetic acid 1.5 g / L and the final concentration of dehydrogenase 0.35 g / L, and the solution was kept at 45°C for 20 min. S2.4 Washing: Wash the oxygen-bleached double-sided knitted fabric with warm water at 85℃ for 10 minutes; S2.5 Drying: Dry the washed double-sided knitted fabric at a temperature of 170℃ and a speed of 10m / min; S2.6 Singeing: The top and bottom surfaces (i.e., the front and back sides) of the dried double-sided knitted fabric are singed once each. During the singeing process, the flame temperature is 980℃, the fabric speed is 20m / min, and the singeing method is cutting and burning. S2.7 Low-concentration loose-alkali mercerizing treatment: Add sodium hydroxide to deionized water and stir evenly to obtain a mercerizing solution with a sodium hydroxide concentration of 95 g / L; Under the conditions of a straight tension of 15 N / m, an overfeed rate of 10%, and a machine speed of 30 m / min, a low-concentration loose alkali mercerizing treatment was carried out on the singed double-sided knitted fabric using mercerizing liquid at a temperature of 30℃. S2.8 pH adjustment: The double-sided knitted fabric after low-concentration loose alkali mercerizing treatment was impregnated with citric acid solution to adjust the pH of the double-sided knitted fabric to 6.50. S2.9 Re-drying: The pH-adjusted double-sided knitted fabric is dried again at a temperature of 150℃ and a speed of 15m / min. S2.10 Simultaneous dyeing and polishing treatment: Add KE reactive dyes CE-N Yellow, LF-2B Red, C-BRF Blue, and leveling agent to deionized water. Mix 3001A, penetrant JFC, and chelating dispersant XH-3304 until homogeneous to obtain treatment solution one with a concentration of 1.0 g / L for leveling agent 3001A, 1.0 g / L for penetrant JFC, 2 g / L for chelating dispersant XH-3304, and 1.0 g / L for leveling agent 3001A. Add acetic acid to treatment solution one. Adjust the pH to 6.5; The double-sided knitted fabric, after being dried again, was immersed in treatment solution one with a liquor ratio of 1:30; the mass ratio of CE-N yellow to double-sided knitted fabric was 0.408:100, the mass ratio of LF-2B red to double-sided knitted fabric was 3.96:100, and the mass ratio of C-BRF blue to double-sided knitted fabric was 0.432:100. Heat the treatment solution to 40°C; Subsequently, neutral polishing enzyme D400 was added to the first treatment solution, with the mass ratio of neutral polishing enzyme D400 to double-sided knitted fabric being 0.05:100. Then, the treatment solution is heated to 50°C and kept at 50°C for 60 minutes. Subsequently, sodium sulfate was added in three separate additions, with a 10-minute interval between each addition. The amount added each time was the same, which was 1 / 3 of the total amount of sodium sulfate added each time. The total amount of sodium sulfate was such that the final concentration of sodium sulfate in the first treatment solution was 50 g / L. Next, sodium hydroxide was added to the treatment solution in two batches. The amount of sodium hydroxide added in the first batch was 1 / 3 of the total amount. After the first addition, the solution was kept at 50°C for 8 minutes. The remaining sodium hydroxide was then added, and the temperature was raised to 60°C and kept at 60°C for 60 minutes. The total amount of sodium hydroxide was used to make the final concentration of sodium hydroxide in the treatment solution 1 15 g / L. Then, acetic acid was added to bring the final concentration of acetic acid to 0.5 g / L, and the mixture was kept at 40°C for 30 min. S2.11 The double-sided knitted fabric after simultaneous dyeing and polishing was soaped for 15 minutes using a soaping solution at a temperature of 95℃ (the soaping solution was prepared by adding soaping agent EPS-5G to deionized water, with a mass ratio of soaping agent EPS-5G to deionized water of 1:2, and stirring evenly to obtain the soaping solution). The mass ratio of soaping agent EPS-5G to double-sided knitted fabric was 1:100. Then, wash the double-sided knitted fabric with 85℃ hot water for 15 minutes; S2.12 Re-drying: The double-sided knitted fabric after open-width washing is dried again at a temperature of 150℃ and a speed of 15m / min. S2.13 Stretching and setting: Add softener 6461A and hand feel agent PUR ELAST to deionized water, stir evenly to obtain a liquid with a mass concentration of softener 6461A of 40 g / L and a mass concentration of hand feel agent PUR ELAST of 20 g / L; Add acetic acid to the liquid to adjust the pH to 5, thus obtaining treatment solution two; The double-sided knitted fabric, after being dried again, was subjected to padding treatment with treatment solution two at a speed of 8 m / min and a liquid retention rate of 60%. S2.14 Re-drying: The double-sided knitted fabric after stretching and setting is dried again at a temperature of 150℃ and a speed of 15m / min. S2.15 Calendering and Pre-shrinking: The double-sided knitted fabric is calendered and pre-shrinked after being dried again using a calendering and pre-shrinking machine. The feed tension is 20N, and the roller pressure is 8.5kg / cm. 2 ; S2.16 Continuous steaming treatment: The double-sided knitted fabric after calendering and pre-shrinking is continuously steamed using a continuous steaming machine. The steam temperature is 100℃, the machine speed is 5m / min, and the steaming pressure is 1.5bar to obtain the knitted fabric.

[0066] Example 4 A method for producing knitted fabric, the specific steps of which are as follows: S1 Knitting: Using a weft knitting method, single-ply Tencel yarn (i.e., Lyocell yarn) with a fineness of 40S, a twist direction of Z, and a twist coefficient of 400, and single-ply T800 high-elastic polyester yarn (commercially available) with a fineness of 50D are knitted on a circular knitting machine. The mass ratio of single-ply Tencel yarn to single-ply T800 high-elastic polyester yarn is 74:26, the needle count is 32 stitches / inch, resulting in a loop length of 30cm / 100 turns and a surface density of 180g / m². 2 A single-sided knitted fabric (the top surface of the single-sided knitted fabric is a cylinder and the bottom surface is an arc). S2.1 Turning over seam: Turning over the single-sided knitted fabric and sewing the end over; S2.2 Cutting: Cut the single-sided knitted fabric longitudinally after turning and flatten it into a flat shape; S2.3 Oxygen bleaching: Add sodium hydroxide and sodium hydrosulfite to deionized water and stir evenly to obtain a treatment solution with a sodium hydroxide concentration of 5 g / L and a sodium hydrosulfite concentration of 7.5 g / L. The slit single-sided knitted fabric was immersed in treatment solution three with a bath ratio of 1:20, and the treatment solution three was heated to 85°C and kept at 85°C for 20 minutes. Then, hydrogen peroxide was added to the treatment solution three, with a final concentration of 5 g / L. The concentration of sodium hydroxide was adjusted to 5 g / L, and the solution was kept at 85°C for 20 min. Subsequently, acetic acid and dehydrogenase (i.e., hydrogen peroxide decomposing enzyme) were added to the third treatment solution to make the final concentration of acetic acid 1.5 g / L and the final concentration of dehydrogenase 0.15 g / L, and the solution was kept at 45°C for 20 min. S2.4 Washing: Wash the oxygen-bleached single-sided knitted fabric with warm water at 75℃ for 15 minutes; S2.5 Drying: Dry the washed single-sided knitted fabric at a temperature of 170℃ and a speed of 10m / min; S2.6 Singeing: The top and bottom surfaces (i.e., front and back) of the dried single-sided knitted fabric are singed once each. During the singeing process, the flame temperature is 800℃, the fabric speed is 20m / min, and the singeing method is cutting and burning. S2.7 Low-concentration loose-alkali mercerizing treatment: Add sodium hydroxide to deionized water and stir evenly to obtain a mercerizing solution with a sodium hydroxide concentration of 80 g / L; Under the conditions of a straight tension of 10 N / m, an overfeed rate of 3%, and a machine speed of 20 m / min, a low-concentration loose alkali mercerizing treatment was carried out on the singed single-sided knitted fabric using mercerizing liquid at a temperature of 25℃. S2.8 pH adjustment: The single-sided knitted fabric treated with low-concentration loose alkali was impregnated with citric acid solution to adjust the pH of the knitted fabric to 7.0. S2.9 Re-drying: The pH-adjusted single-sided knitted fabric is dried again at a temperature of 170℃ and a speed of 10m / min. S2.10 Simultaneous dyeing and polishing treatment: Add KE reactive dyes CE-N Yellow, LF-2B Red, C-BRF Blue, and leveling agent to deionized water. Mix 3001A, penetrant JFC, and chelating dispersant XH-3304 until homogeneous to obtain treatment solution one with a concentration of 1.0 g / L for leveling agent 3001A, 1.0 g / L for penetrant JFC, 2 g / L for chelating dispersant XH-3304, and 1.0 g / L for leveling agent 3001A. Add acetic acid to treatment solution one. Adjust the pH to 6.5; The re-dried single-sided knitted fabric was immersed in treatment solution one with a liquor ratio of 1:30; the mass ratio of CE-N yellow to single-sided knitted fabric was 0.408:100, the mass ratio of LF-2B red to single-sided knitted fabric was 3.96:100, and the mass ratio of C-BRF blue to single-sided knitted fabric was 0.432:100. Heat the treatment solution to 40°C; Subsequently, neutral polishing enzyme D400 was added to the first treatment solution, with the mass ratio of neutral polishing enzyme D400 to single-sided knitted fabric being 0.05:100. Then, the treatment solution is heated to 50°C and kept at 50°C for 60 minutes. Subsequently, sodium sulfate was added in three separate additions, with a 10-minute interval between each addition. The amount added each time was the same, which was 1 / 3 of the total amount of sodium sulfate added each time. The total amount of sodium sulfate was such that the final concentration of sodium sulfate in the first treatment solution was 50 g / L. Next, sodium hydroxide was added to the treatment solution in two batches. The amount of sodium hydroxide added in the first batch was 1 / 3 of the total amount. After the first addition, the solution was kept at 50°C for 9 minutes. The remaining sodium hydroxide was then added, and the temperature was raised to 60°C and kept at 60°C for 60 minutes. The total amount of sodium hydroxide was used to make the final concentration of sodium hydroxide in the treatment solution 1 15 g / L. Then, acetic acid was added to bring the final concentration of acetic acid to 0.5 g / L, and the mixture was kept at 40°C for 30 min. S2.11 The single-sided knitted fabric after simultaneous dyeing and polishing was soaped for 15 minutes using a soaping solution at a temperature of 95℃ (the soaping solution was prepared by adding soaping agent EPS-5G to deionized water, with a mass ratio of soaping agent EPS-5G to deionized water of 1:2, and stirring evenly to obtain the soaping solution). The mass ratio of soaping agent EPS-5G to single-sided knitted fabric was 1:100. Then, wash the single-sided knitted fabric with 85℃ hot water for 15 minutes; S2.12 Re-drying: The single-sided knitted fabric after open-width washing is dried again at a temperature of 150℃ and a speed of 15m / min. S2.13 Stretching and setting: Add softener 6461A and hand feel agent PUR ELAST to deionized water, stir evenly to obtain a liquid with a mass concentration of softener 6461A of 40 g / L and a mass concentration of hand feel agent PUR ELAST of 20 g / L; Add acetic acid to the liquid to adjust the pH to 5, thus obtaining treatment solution two; The single-sided knitted fabric, after being dried again, was subjected to padding treatment with treatment solution two at a speed of 8 m / min and a liquid retention rate of 60%. S2.14 Re-drying: The single-sided knitted fabric after stretching and setting is dried again at a temperature of 150℃ and a speed of 15m / min. S2.15 Calendering and Pre-shrinking: The single-sided knitted fabric after re-drying is calendered and pre-shrinked using a calendering and pre-shrinking machine. The fabric tension is 50N, and the roller pressure is 8kg / cm. 2 ; S2.16 Continuous steaming treatment: The single-sided knitted fabric after calendering and pre-shrinking is continuously steamed using a continuous steaming machine. The steam temperature is 110℃, the machine speed is 6m / min, and the steaming pressure is 2.0 bar to obtain the knitted fabric.

[0067] Example 5 A method for producing knitted fabric, the specific steps of which are as follows: S1.1 Combing: The long-staple cotton fibers are combed using a combing machine with a feed length of 4.0 mm, a combing speed of 400 nips / min, a forward feeding method, a feed lap weight of 80 g / m, and a drop separation distance of 13 mm. The cylinder used is selected from Ri-Q-Comb i700 flex cylinder with a draft ratio of 1.10, resulting in a combed cotton sliver. S1.2 Compact spinning: The cotton combed sliver is spun into yarn using a compact spinning machine. The roving weight is 2g / 10m, the fine yarn weight is 14g / 1000m, the back zone draft ratio is 1.2, and the spindle speed is 5000r / min, resulting in a single-ply cotton yarn (Z-twist) with a fineness of 80S and a twist coefficient of 390. S1.3 Knitting: A weft knitting method is used to knit single-ply cotton yarn and commercially available 20D antibacterial spandex yarn on a circular knitting machine. The mass ratio of single-ply cotton yarn to antibacterial spandex yarn is 95:5, the needle count is 36 stitches / inch, and the resulting loop length is 20cm / 100 loops with a areal density of 188.6g / m². 2Double-sided knitted fabric (both the first and second sides of the double-sided knitted fabric are loop-column, that is, the top and bottom surfaces of the double-sided knitted fabric are both loop-column). S2.1 Turning over seam: Turning over the double-sided knitted fabric and sewing the seam end; S2.2 Cutting: Cut the double-sided knitted fabric longitudinally after turning and flatten it into a flat shape; S2.3 Oxygen bleaching: Add sodium hydroxide and sodium hydrosulfite to deionized water and stir evenly to obtain a treatment solution with a sodium hydroxide concentration of 5 g / L and a sodium hydrosulfite concentration of 9.5 g / L. The split double-sided knitted fabric was immersed in treatment solution three with a bath ratio of 1:20, and the treatment solution three was heated to 85°C and kept at 85°C for 20 minutes. Then, hydrogen peroxide was added to the treatment solution three, with a final concentration of 4 g / L. The concentration of sodium hydroxide was adjusted to 4 g / L, and the solution was kept at 85°C for 20 min. Subsequently, acetic acid and dehydrogenase (i.e., hydrogen peroxide decomposing enzyme) were added to the third treatment solution to make the final concentration of acetic acid 1.5 g / L and the final concentration of dehydrogenase 0.15 g / L, and the solution was kept at 45°C for 20 min. S2.4 Washing: Wash the oxygen-bleached double-sided knitted fabric with warm water at 75℃ for 15 minutes; S2.5 Drying: Dry the washed double-sided knitted fabric at a temperature of 165℃ and a speed of 10m / min; S2.6 Singeing: The top and bottom surfaces (i.e., the front and back sides) of the dried double-sided knitted fabric are singed once each. During the singeing process, the flame temperature is 800℃, the fabric speed is 20m / min, and the singeing method is cutting and burning. S2.7 Low-concentration loose-alkali mercerizing treatment: Add sodium hydroxide to deionized water and stir evenly to obtain a mercerizing solution with a sodium hydroxide concentration of 110 g / L. Under the conditions of a straight tension of 12 N / m, an overfeed rate of 3%, and a machine speed of 40 m / min, a low-concentration loose alkali mercerizing treatment was carried out on the singed double-sided knitted fabric using mercerizing liquid at a temperature of 30℃. S2.8 pH adjustment: The double-sided knitted fabric after low-concentration loose alkali mercerizing treatment was impregnated with citric acid solution to adjust the pH of the knitted fabric to 7.0. S2.9 Re-drying: The pH-adjusted double-sided knitted fabric is dried again at a temperature of 165℃ and a speed of 10m / min. S2.10 Simultaneous dyeing and polishing treatment: Add KE reactive dyes CE-N Yellow, LF-2B Red, C-BRF Blue, and leveling agent to deionized water. Mix 3001A, penetrant JFC, and chelating dispersant XH-3304 until homogeneous to obtain treatment solution one with a concentration of 1.0 g / L for leveling agent 3001A, 1.0 g / L for penetrant JFC, 2 g / L for chelating dispersant XH-3304, and 1.0 g / L for leveling agent 3001A. Add acetic acid to treatment solution one. Adjust the pH to 6.5; The double-sided knitted fabric, after being dried again, was immersed in treatment solution one with a liquor ratio of 1:30; the mass ratio of CE-N yellow to double-sided knitted fabric was 0.408:100, the mass ratio of LF-2B red to double-sided knitted fabric was 3.96:100, and the mass ratio of C-BRF blue to double-sided knitted fabric was 0.432:100. Heat the treatment solution to 40°C; Subsequently, neutral polishing enzyme D400 was added to the first treatment solution, with the mass ratio of neutral polishing enzyme D400 to double-sided knitted fabric being 0.05:100. Then, the treatment solution is heated to 50°C and kept at 50°C for 60 minutes. Subsequently, sodium sulfate was added in three separate additions, with a 10-minute interval between each addition. The amount added each time was the same, which was 1 / 3 of the total amount of sodium sulfate added each time. The total amount of sodium sulfate was such that the final concentration of sodium sulfate in the first treatment solution was 50 g / L. Next, sodium hydroxide was added to the treatment solution in two batches. The amount of sodium hydroxide added in the first batch was 1 / 3 of the total amount. After the first addition, the solution was kept at 50°C for 10 minutes. The remaining sodium hydroxide was then added, and the temperature was raised to 60°C and kept at 60°C for 60 minutes. The total amount of sodium hydroxide was used to make the final concentration of sodium hydroxide in the treatment solution 1 15 g / L. Then, acetic acid was added to bring the final concentration of acetic acid to 0.5 g / L, and the mixture was kept at 40°C for 30 min. S2.11 The double-sided knitted fabric after simultaneous dyeing and polishing was soaped for 15 minutes using a soaping solution at a temperature of 95℃ (the soaping solution was prepared by adding soaping agent EPS-5G to deionized water, with a mass ratio of soaping agent EPS-5G to deionized water of 1:2, and stirring evenly to obtain the soaping solution). The mass ratio of soaping agent EPS-5G to double-sided knitted fabric was 1:100. Then, wash the double-sided knitted fabric with 85℃ hot water for 15 minutes; S2.12 Re-drying: The double-sided knitted fabric after open-width washing is dried again at a temperature of 150℃ and a speed of 15m / min. S2.13 Stretching and setting: Add softener 6461A and hand feel agent PUR ELAST to deionized water, stir evenly to obtain a liquid with a mass concentration of softener 6461A of 40 g / L and a mass concentration of hand feel agent PUR ELAST of 20 g / L; Add acetic acid to the liquid to adjust the pH to 5, thus obtaining treatment solution two; The double-sided knitted fabric, after being dried again, was subjected to padding treatment with treatment solution two at a speed of 8 m / min and a liquid retention rate of 60%. S2.14 Re-drying: The double-sided knitted fabric after stretching and setting is dried again at a temperature of 150℃ and a speed of 15m / min. S2.15 Calendering and Pre-shrinking: The double-sided knitted fabric is calendered and pre-shrinked after being dried again using a calendering and pre-shrinking machine. The fabric tension is 80N and the roller pressure is 9kg / cm. 2 ; S2.16 Continuous steaming treatment: The double-sided knitted fabric after calendering and pre-shrinking is continuously steamed using a continuous steaming machine. The steam temperature is 105℃, the machine speed is 9m / min, and the steaming pressure is 1.5bar to obtain the knitted fabric.

[0068] Comparative Example 1 The difference between this comparative example and Example 1 is that the modal fiber content in the double-knitted fabric is 44% by mass.

[0069] Comparative Example 2 The difference between this comparative example and Example 1 is that the twist coefficient of the modal single strand yarn is 350.

[0070] Comparative Example 3 The difference between this comparative example and Example 1 is that the twist coefficient of the modal single strand yarn is 430.

[0071] Comparative Example 4 The difference between this comparative example and Example 1 is that no singeing treatment was performed.

[0072] Comparative Example 5 The difference between this comparative example and Example 1 is that the concentration of sodium hydroxide in the mercerizing solution is 70 g / L.

[0073] Comparative Example 6 The difference between this comparative example and Example 1 is that the concentration of sodium hydroxide in the mercerizing solution is 130 g / L.

[0074] Comparative Example 7 The difference between this comparative example and Example 1 is that the longitudinal tension is 4 N / m during the low-concentration loose alkali mercerizing process.

[0075] Comparative Example 8 The difference between this comparative example and Example 1 is that the longitudinal tension is 22 N / m during the low-concentration loose alkali mercerizing process.

[0076] Comparative Example 9 The difference between this comparative example and Example 1 is that the overfeed rate was 2% during the low-concentration loose alkali mercerizing process.

[0077] Comparative Example 10 The difference between this comparative example and Example 1 is that the overfeed rate was 11% during the low-concentration loose alkali mercerizing process.

[0078] Comparative Example 11 The difference between this comparative example and Example 1 is that the machine speed during the low-concentration alkali mercerizing process is 19 m / min.

[0079] Comparative Example 12 The difference between this comparative example and Example 1 is that the machine speed during the low-concentration alkali mercerizing process is 42 m / min.

[0080] Comparative Example 13 The difference between this comparative example and Example 1 is that no calendering and pre-shrinking treatment was performed.

[0081] Comparative Example 14 The difference between this comparative example and Example 1 is that continuous steaming was not performed.

[0082] Comparative Example 15 The difference between this comparative example and Example 1 is that the steam temperature is 99°C during the continuous steaming process.

[0083] Comparative Example 16 The difference between this comparative example and Example 1 is that the steam temperature during the continuous steaming process is 116°C. Comparative Example 17 The difference between this comparative example and Example 1 is that the machine speed is 4 km / h during the continuous steaming process. m / min.

[0084] Comparative Example 18 The difference between this comparative example and Example 1 is that the machine speed during the continuous steaming process is 11. m / min.

[0085] Comparative Example 19 The difference between this comparative example and Example 1 is that the steaming pressure during the continuous steaming process is 0.4. bar.

[0086] Comparative Example 20 The difference between this comparative example and Example 1 is that the steaming pressure during the continuous steaming process is 2.1. bar.

[0087] test The performance testing environment for all the following fabrics was: temperature 21.5℃, relative humidity 65.2%, and the tests were conducted after 24 hours of humidity balancing under standard atmospheric conditions.

[0088] The softness F-values ​​of the knitted fabrics prepared in Examples 1-5 and Comparative Examples 1-20 were tested according to the "FT / ZFB 0003-2019 Test Instrument Method for Relative Hand Feel Value of Textiles". The results are shown in Table 1. The gloss of the knitted fabrics prepared in Examples 1-5 and Comparative Examples 1-20 was tested according to "FZ / T 01097-2006 Test Method for Fabric Gloss" (incident angle 60°), and the results are shown in Table 1. The tensile elastic recovery rate (%) of the knitted fabrics prepared in Examples 1-5 and Comparative Examples 1-20 were tested according to the "Test Method for Tensile Elastic Recovery Rate of Knitted Fabrics" (FZ / T 70006-2022). The test conditions were: clamping distance 100mm, elongation 50%, and pre-tension 0.1N. The results are shown in Table 1 (the results are the average values ​​of the longitudinal and transverse directions).

[0089] The anti-pilling grades of knitted fabrics prepared according to parameter category C of GB / T 4802.1-2008 Textiles - Determination of pilling properties of fabrics - Part 1: Circular trajectory method are shown in Table 1. The dimensional change rate of knitted fabrics prepared according to Examples 1-5 and Comparative Examples 1-20 in GB / T 8628-2013 Test Methods for Determination of Dimensional Change in Textiles (Preparation, Marking and Measurement of Fabric Samples and Garments) was tested (measured after one wash and laid flat to dry). The results are shown in Table 1.

[0090] Table 1 Test Results

[0091] As shown in Table 1, compared with Comparative Examples 1-20, the knitted fabric prepared in Example 1 exhibits significantly improved softness, luster, and elastic recovery rate. This result demonstrates that the present invention can effectively balance the softness, luster, anti-pilling properties, and structural stability of the fabric.

[0092] 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 knitted fabric, characterized in that, The production method includes the following steps: S1. Cellulose fiber yarn and elastic fiber yarn are knitted using a weft knitting method to obtain a knitted fabric, wherein the mass percentage of cellulose fiber in the knitted fabric is 45%-95%; S2. The knitted fabric is sequentially subjected to singeing, low-concentration loose alkali mercerizing treatment, calendering pre-shrinking and continuous steaming treatment to obtain the knitted fabric; during the low-concentration loose alkali mercerizing treatment, the longitudinal tension is 5N / m-20N / m, the machine speed is 20m / min-40m / min, the overfeed rate is 3%-10%, and the mercerizing solution used contains 80g / L-110g / L of inorganic alkali.

2. The method for producing knitted fabric as described in claim 1, characterized in that, In step S1, the cellulose fiber yarn is a single-ply yarn or a double-ply yarn.

3. The method for producing knitted fabric as described in claim 2, characterized in that, In step S1, if the cellulose fiber yarn is a single-ply yarn, the fineness of the cellulose fiber yarn is 40S-80S, and the twist direction is Z-twist; if the cellulose fiber yarn is a double-ply yarn, the fineness of the cellulose fiber yarn is 60S / 2-160S / 2, and the twist direction is S-twist.

4. The method for producing knitted fabric as described in claim 1, characterized in that, In step S1, the twist coefficient of the cellulose fiber yarn is 360-420; And / or, in step S1, if the cellulose fiber yarn includes natural fibers, the natural fibers are combed and then made into yarn using a compact spinning process; And / or, in step S1, the fineness of the elastic fiber yarn is 20D-50D; And / or, in step S1, during the knitting process, the number of stitches is 32 stitches / inch to 36 stitches / inch; And / or, in step S1, the loop length of the knitted fabric is 20cm / 100 turns to 30cm / 100 turns; And / or, in step S1, the areal density of the knitted fabric is 180 g / m². 2 -240g / m 2 ; And / or, in step S2, the temperature of the mercerizing liquid is 25℃-30℃.

5. The method for producing knitted fabric as described in claim 1, characterized in that, In step S2, during the calendering and pre-shrinking process, the fabric tension is 20N-100N, and the pressure of the rollers used is 8kg / cm. 2 -10kg / cm 2 .

6. The method for producing knitted fabric as described in claim 1, characterized in that, In step S2, during the continuous steaming process, the steam temperature is 100℃-115℃, the vehicle speed is 5m / min-10m / min, and the steaming pressure is 0.5bar-2bar.

7. The method for producing knitted fabric as described in claim 1, characterized in that, In step S2, after knitting and before singeing, the production method further includes the following steps: oxygen bleaching, washing, and drying.

8. The method for producing knitted fabric as described in claim 1 or 7, characterized in that, In step S2, after the low-concentration loose alkali mercerizing treatment and before calendering and pre-shrinking, the production method further includes the following steps: acid neutralization of the knitted fabric, drying, and polishing.

9. A knitted fabric obtained by the method according to any one of claims 1-8.

10. A textile product, characterized in that, The textile includes the knitted fabric as described in claim 9.

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