Production method of yarn-dyed silk protein pure cotton fabric

Abstract

The application discloses a production method of a colored silk fibroin pure cotton fabric, and comprises the following steps: selecting 80S-120S high-count cotton yarn for bobbin dyeing; performing no-sizing slitting and beam warping and large jacquard weaving; performing biological enzyme polishing treatment by using cellulase to replace mechanical singeing and control the weight loss rate to be 3-5%; adopting a silk fibroin solution to cooperate with a multi-functional group epoxy crosslinking agent to perform functional finishing, so that the silk fibroin and the cotton fiber are combined in a covalent bond, and the strong alkali mercerizing process is replaced; and finally, the fabric is subjected to tentering and setting. The application can bypass the traditional singeing and mercerizing processes, can retain the natural strength and moisture absorption of the cotton fiber, can give the fabric a warm and soft silk luster and soft and sticky hand feeling, and can be green and environment-friendly in the production process, and can significantly reduce chemical pollution and energy consumption.

Description

Technical Field

[0001] This invention relates to the field of textile fabric technology, and in particular to a method for producing yarn-dyed silk protein pure cotton fabric. Background Technology

[0002] Existing conventional yarn-dyed cotton fabrics tend to be stiff and lack a soft, smooth feel, limiting comfort. Conventional processes using large amounts of chemical softeners result in poor washability. Furthermore, unsinged fabrics often have a layer of short-fiber fuzz on the surface, leading to poor surface smoothness and easy dust accumulation. Direct contact with the skin can also cause itching. Additionally, unmercerized cotton fabrics retain the natural twist and cross-section of the fibers, resulting in a lack of directional light reflection, dull overall luster, and a lack of texture and perceived quality.

[0003] Double-mercerized singed fabric, which undergoes two singeing and two mercerizing processes, has high production costs and extremely high process requirements. Incomplete singeing can leave residual short fibers that cause pilling. Improper alkalinity control or inadequate washing during mercerizing can easily result in irregular aurora marks on the fabric surface, and even residual chemicals that may irritate the skin. The high-concentration alkali treatment in double-mercerized fabric causes excessive fiber swelling and an overly dense fiber structure. While smooth, it loses the softness of cotton fibers, feeling stiffer to the touch, and its natural moisture absorption capacity is reduced. Two strong-alkali mercerizing processes cause cumulative damage to the fibers, reducing the overall strength of the fabric. The luster becomes overly sharp and unnatural, showing signs of artificial finishing. Furthermore, the production process generates a large amount of highly alkaline wastewater, resulting in high treatment costs and significant environmental impact. Summary of the Invention

[0004] The purpose of this invention is to provide a method for producing yarn-dyed silk protein pure cotton fabric, which can bypass the traditional singeing and mercerizing processes, while retaining the natural strength and moisture absorption of cotton fibers, giving the fabric a warm silk luster and soft and supple feel. Moreover, the production process is green and environmentally friendly, significantly reducing chemical pollution and energy consumption.

[0005] To achieve the objective of this invention, a method for producing yarn-dyed silk protein pure cotton fabric is provided, comprising the following steps:

[0006] S1. Yarn Preparation and Reactive Dyeing of Bundle Yarn: High-count cotton yarn of 80S-120S (combed and compact) is selected as raw material. The single yarns are plyed and twisted into plied yarn. The plied yarn enters the bundle dyeing machine and is dyed with reactive dyes. During the dyeing process, the liquor ratio of the dye liquor is adjusted to a range of 1:8 to 1:12, and the fixing temperature and time are precisely controlled to ensure that the dye molecules fully penetrate into the fiber and form a stable covalent bond. After dyeing, the yarn undergoes thorough cold water washing, acid washing neutralization, soaping, and hot water washing to remove surface dye. Finally, the yarn is dried. The dyeing process compensates for the color depth difference caused by the mercerizing process, ensuring that the hue and saturation of the final product meet the preset standards.

[0007] S2. Green Sizing-Free Warping: The dyed yarn is placed on a sizing warping machine for warping. The warping process does not involve any sizing process; the yarn arrangement is achieved through physical tension control. The fabric width is set to 106 inches, the warp density is set to 200 warp ends / inch, and the total number of warp ends is set to 20,964. During the warping process, 300 bobbins are arranged per sliver, and the displacement is precisely controlled within 1.3 mm. The warping tension is monitored in real time by a tension sensor and fed back to the electromagnetic braking system, so that the tension fluctuation deviation of the entire warp is controlled within ±0.5 cN, thereby preventing weaving breakage caused by uneven tension.

[0008] S3. Jacquard Weaving Process: The warp beams after warping are loaded onto an electronic jacquard loom. The weaving process adopts traditional Chinese style, neo-Chinese style, or geometric texture patterns, and increases the layering and thickness of the fabric by configuring a weft-weighted structure. During the weaving process, the environmental parameters of the weaving workshop are strictly controlled, with the temperature maintained at 25°C and the relative humidity maintained between 65% and 75%. This humidity environment allows the unsized yarn to maintain the necessary moisture content, increasing the toughness and abrasion resistance of the fibers, thereby offsetting the lack of physical protection for the yarn in the unsized process. The loom speed is controlled at 350-450 rpm, and with the help of a precision shedding mechanism, the warp and weft yarns interweave to form a three-dimensional jacquard pattern.

[0009] S4. Bio-enzyme polishing treatment: The woven fabric is placed in an overflow dyeing machine or a flat-width continuous processing machine for bio-enzyme polishing to replace the traditional mechanical singeing process. The polishing solution consists of neutral or acidic cellulase, a penetrant, and a buffer system. The amount of cellulase is 0.5% to 5.0% of the fabric weight, and the concentration of the penetrant is 0.5 to 5.0 g / L. The polishing temperature is controlled at 45-55℃, and the pH value is adjusted to the range of 4.5-5.5 using an acetic acid / sodium acetate buffer system. The bio-enzyme polishing treatment time is 30-90 minutes, and the liquor ratio is set to 1:10 to 1:45. The cellulase breaks the glycosidic bonds at the root of the protruding hairs on the surface of the cotton fibers through specific hydrolysis, causing the hairs to fall off the fabric surface under the synergistic effect of mechanical friction. By monitoring the weight loss rate of the fabric and controlling it within the range of 3% to 5%, the fabric surface achieves a smooth and flat effect, while avoiding excessive damage to the main fiber structure and preserving the tensile strength of the fabric.

[0010] S5. Silk Fiber Functional Finishing: A silk fibroin functional coating is applied to the fabric after bio-enzyme polishing to replace the traditional strong-alkali mercerizing process. The finishing solution contains a silk fibroin solution, a multifunctional epoxy crosslinking agent, and a catalyst. The concentration of silk fibroin is 20 g / L, the concentration of the multifunctional epoxy crosslinking agent is 200 g / L, and the concentration of the catalyst, magnesium chloride, is 14 g / L. The finishing process uses a padding method, with the padding rate controlled between 70% and 80%. The multifunctional epoxy crosslinking agent undergoes a ring-opening reaction at high temperature, and its active groups form covalent bonds with the hydroxyl groups on the cotton fibers and the amino or carboxyl groups on the silk fibroin molecular chains. The finished fabric is pre-dried at 100-120℃ and then baked at 150-160℃ for setting, resulting in a uniform, transparent film with a high refractive index formed on the fiber surface. This film fills in the microscopic depressions on the cotton fiber surface, reducing diffuse reflection of light and thus giving the fabric a warm, silky luster.

[0011] S6. Finishing and Finishing: The finished fabric undergoes final stretching and setting to adjust its width and weight, ensuring a stable dimensional change rate. No silicone softeners are added during the finishing process; the fabric achieves its soft and supple feel through the bioactive components of the silk protein itself.

[0012] As a preferred technical solution of the present invention, the sizing-free warping process in step S2 employs a high-precision slitting warping machine displacement control system to ensure that the warp yarns are arranged in an extremely uniform density on the warp beam. The 1.3mm displacement is precisely calculated based on the diameter of 80S-120S yarns, aiming to eliminate stripe shadows and overlapping phenomena, so that the warp yarn opening is clear during weaving and the frictional resistance is minimized, thereby achieving efficient weaving under sizing-free protection.

[0013] As a preferred technical solution of the present invention, the jacquard structure in step S3 specifically adopts a double warp or double weft structure, which increases the float of local yarns so that the fabric surface can reflect more incident light; the structure and the subsequent silk protein film produce a synergistic effect, so that the jacquard pattern presents a dynamic luster of alternating light and dark at different angles, enhancing the visual expressiveness of the fabric.

[0014] As a preferred technical solution of the present invention, the core of the bio-enzyme polishing process in step S4 lies in the precise control of enzyme reaction kinetics; the acetic acid / sodium acetate buffer system stabilizes the hydrogen ion concentration in the solution, ensuring that the cellulase activity is always in the peak range; the liquor ratio range of 1:10 to 1:45 is dynamically adjusted according to the thickness of the fabric and the complexity of the jacquard structure, ensuring that the enzyme solution can penetrate evenly into the depressions of the jacquard pattern, achieving fuzz removal without dead angles on the entire fabric surface; the control of the weight loss rate is achieved through online sampling analysis and the addition of a reaction terminator. When the preset weight loss target is reached, the enzyme protein is denatured and inactivated by rapidly heating to above 80°C, thereby precisely stopping the hydrolysis reaction.

[0015] As a preferred technical solution of the present invention, the silk fibroin finishing in step S5 utilizes the complementarity of the chemical structure between silk fibroin and cotton fiber; the multifunctional epoxy crosslinking agent not only acts as a medium for connection, but also forms a micro-flexible support between fibers through its long-chain molecular structure, so that the fabric has a stronger recovery ability after being compressed or bent; the magnesium chloride catalyst reduces the reaction activation energy, so that the crosslinking reaction is completed in a short time, preventing the yellowing of cotton fiber color caused by high temperature; the thickness of the silk fibroin film is controlled at the micrometer level, which neither blocks the air pores between fibers, but is sufficient to change the optical reflection characteristics of the fiber surface.

[0016] As a preferred technical solution of the present invention, in step S4, a specific surfactant is added to the bio-enzyme polishing liquid. The surfactant reduces the surface tension of the liquid, allowing enzyme molecules to quickly enter the interlacing points of the jacquard structure. The interlacing points are often areas where hairs accumulate and are difficult to remove by mechanical means. The penetrating hydrolysis of the bio-enzyme allows the hairs in these hidden areas to be effectively cleaned, thereby improving the uniformity of the entire fabric surface.

[0017] As a preferred technical solution of the present invention, in step S5, the silk fibroin solution is obtained by degumming, dissolving and dialysis purification of waste silk. This recycling of biological resources further enhances the environmental value of the product. The molecular structure of the multifunctional epoxy crosslinking agent contains multiple epoxy groups. These groups exhibit extremely high chemical activity when heated and can undergo etherification reaction with the secondary hydroxyl groups on the cotton fiber cellulose macromolecule to form an extremely stable chemical structure, which makes the finished fabric have excellent dimensional stability and wrinkle resistance.

[0018] As a preferred technical solution of the present invention, the finished product setting process in step S6 adopts an ultrasonic-assisted spraying device to uniformly spray a small amount of functional additives onto the fabric surface in the form of aerosol; the ultrasonic energy helps the additive molecules to further penetrate into the deep layers of the fiber, thereby finely adjusting the drape coefficient of the fabric without increasing the fabric weight, so that the final jacquard fabric presents a smooth line when hung.

[0019] Compared with the prior art, the present invention provides a method for producing yarn-dyed silk protein pure cotton fabric, which has the following beneficial effects:

[0020] This invention successfully upgrades pure cotton fabric to a "silk-like" state through biochemical modification of the fiber's microstructure. It bypasses traditional singeing and mercerizing processes, preserving the natural strength and moisture absorption of cotton fibers while imparting a warm, silky luster and soft, supple feel to the fabric. Furthermore, the production process is environmentally friendly, significantly reducing chemical pollution and energy consumption. Through the synergistic effect of steps S1 to S6, the morphology of the cotton fibers transforms from an irregular oval shape to a near-circular shape. However, this transformation is achieved through surface film formation rather than internal swelling, thus preserving the fiber's internal microporous structure. This microporous structure is the core physical basis for the breathability and moisture absorption of cotton fibers. This invention, through this "external modification, internal preservation" technical strategy, resolves the contradiction between high-quality visual effects and the comfort of natural fibers. For yarns of different counts (80S-120S), precise processing of fibers of varying fineness is achieved by dynamically adjusting the concentration of bio-enzymes and polishing time. For ultra-high-count 120S yarns, the enzyme concentration is appropriately reduced and the processing time extended to achieve a more delicate surface polishing effect. For 80S yarns, relatively coarse and long fuzz is quickly removed by increasing the mechanical oscillation frequency in conjunction with a medium-concentration enzyme solution. This flexible process configuration allows the invention to cover a wide range of high-count fabric varieties, exhibiting strong industrial applicability. Through digital management of tension during the sizing-free warping stage, the elongation of the 20,964 warp yarns remains highly consistent throughout the weaving process. This tension consistency directly affects the geometric dimensional accuracy of the large jacquard pattern, ensuring that complex traditional Chinese patterns do not twist or deform across the entire fabric width. This high-precision physical control, combined with subsequent biochemical finishing, constitutes the technical guarantee for the production of high-quality, silky-feel fabrics in this invention.

[0021] This invention, through a series of innovative process combinations, not only solves the technical problems of dull luster and stiff feel in existing pure cotton fabrics, but also achieves environmental protection through green manufacturing processes, resulting in significant economic and social benefits. Each step of the technical solution has undergone rigorous logical design and experimental verification, ensuring the operability and stability of the production method in actual industrial environments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the method flow of the present invention. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0024] Please see Figure 1 This invention provides a method for producing yarn-dyed silk protein pure cotton fabric, comprising the following steps:

[0025] In step S1, yarn preparation and reactive dyeing of the yarn packages are performed. This embodiment uses high-count pure cotton yarn of 80S to 120S that has undergone combing treatment. The compact spinning process, by adding a suction device in the front zone of the ring spinning machine, allows the fibers to be tightly arranged under stress, significantly reducing the fuzz on the yarn surface. The single yarns are then plyed to form double-ply yarns to enhance the yarn's breaking strength and weaving stability. The ply yarns are wound into uniformly dense packages and placed in the yarn package dyeing machine. The dyeing process uses dual-reactive-group reactive dyes. These dyes contain two or more reactive groups in their molecular structure. Under alkaline fixing conditions, the reactive groups of the dye molecules undergo nucleophilic substitution or addition reactions with the hydroxyl groups on the cotton fiber cellulose macromolecules, forming stable covalent bonds. Since subsequent processes do not involve strong-alkali mercerizing, the deepening effect that usually occurs during mercerizing is pre-compensated in this step by precisely adjusting the dye concentration. The liquor ratio of the dye liquor is maintained at 1:10 by an automatic feeding system, ensuring uniform diffusion of dye molecules within the fiber. During the color-fixing stage, the temperature control accuracy is maintained within ±0.5℃ using a proportional-integral-derivative regulator to ensure color consistency. After dyeing, a multi-stage continuous washing process is employed, including cold water washing, acid washing to neutralize residual alkali, high-temperature soaping to remove floating color, and a final rinsing with clean water. This ensures that the yarn's wash fastness and rubbing fastness both reach grade 4 or higher. During the drying process, low-frequency pulsed hot air is used for penetrating drying to prevent color differences between the inner and outer layers of the yarn, preparing high-quality yarn with rich color and minimal strength damage for subsequent weaving.

[0026] In step S2, green, sizing-free slitting and warping are performed. The dyed and dried yarn is loaded onto the yarn rack of the slitting and warping machine. This invention employs a sizing-free process, completely eliminating the steps required by traditional processes that consume large amounts of chemical sizing agents, electricity, and subsequent desizing wastewater. To address the issue of frictional damage to sizing-free yarns during weaving, controlling the warping tension is crucial. The warping machine is set to a width of 106 inches, a warp density of 200 warp ends per inch, and a total of 20,964 warp ends. During warping, the warp yarns are divided into several strips, each containing 300 bobbins. The lateral displacement of the warping table is controlled by a high-precision displacement sensor and precisely set to 1.3 mm. This value is calculated based on the diameter and arrangement density of the high-count yarn, ensuring that the warp yarns are tightly arranged on the warp beam without overlapping or gaps. By adjusting the dynamic tension of each yarn in real time using an electromagnetic tensioner, the tension fluctuation deviation of the warp beam is kept within a very small range. This uniform tension distribution allows the yarn to withstand the instantaneous high-frequency stretching when the weaving begins, even without the application of sizing.

[0027] In step S3, the jacquard weaving process is executed. The warp beams, now fully warped, are installed onto an electronic jacquard loom. During the design process, considering the high count and density characteristics, patterns with rich textures, such as traditional Chinese style or modern Chinese style, are selected. The weave structure employs a double-layered weave or a weft-weighted weave. The double-layered weave, by adding overlapping layers of weft yarns in certain areas, creates a three-dimensional, embossed effect on the fabric surface. The environmental parameters of the weaving workshop are controlled by a central air conditioning system, maintaining a constant temperature and humidity of 25°C and a relative humidity between 65% and 75%. Under these humidity conditions, the moisture content of the cotton fibers remains around 8%, and the fiber's flexibility and elongation are at their optimal levels. This reduces the coefficient of friction of the unsized yarn during high-speed shuttle movement, minimizing the risk of static electricity buildup and fiber breakage. The loom spindle drives the shedding mechanism in high-frequency motion, and the electronic needle selector controls the warp yarn lifting and lowering, causing the warp and weft yarns to interweave according to the preset complex weave structure. Thanks to the use of tightly spun yarns and precise tension control, the weaving efficiency is maintained at over 90%, and the resulting fabric has a smooth surface, clear patterns, and no defects such as broken warp or weft.

[0028] In step S4, a bio-enzymatic polishing treatment is performed, which is the core step replacing the traditional singeing process. The woven fabric is placed in an overflow dyeing machine. The polishing solution formula consists of neutral or acidic cellulase, a special penetrant, and an acetate buffer system. The amount of cellulase is set to 0.5% to 5.0% of the fabric weight. The penetrant reduces the surface tension of the solution, allowing enzyme molecules to quickly penetrate into the depressions of the jacquard structure. During the process, the solution temperature is heated to 45 to 55°C, and the pH value is stabilized between 4.5 and 5.5 using acetic acid and sodium acetate, which is the optimal range for cellulase activity. As a biocatalyst, cellulase specifically hydrolyzes the glycosidic bonds at the roots of the fine hairs extending from the surface of cotton fibers through the synergistic action of its endopeptidases, exopeptidases, and glucosidases. Under the mechanical rubbing and water flow impact of the overflow machine, the weakened hairs are detached from the main fabric. By monitoring the processing time in real time within 30 to 90 minutes and strictly controlling the weight loss rate of the fabric between 3% and 5%, this precise weight reduction process achieves a smoothness similar to singeing. At the same time, due to the high selectivity of the enzyme reaction, it does not produce carbonization points or damage the internal strength of the fibers like physical flame singeing, thus allowing the fabric to maintain its original softness and mechanical strength.

[0029] In step S5, a functional finishing process using silk fibroin auxiliaries is performed, which aims to replace the traditional strong-alkali mercerizing process. The silk fibroin finishing solution contains a 20 g / L silk fibroin solution, a 200 g / L multifunctional epoxy crosslinking agent, and a 14 g / L magnesium chloride catalyst. A two-dip, two-nip process is used to ensure that the finishing solution fully penetrates the fiber gaps. Silk fibroin contains a large number of hydrophilic amino acids, and the polar groups in its molecular structure have a natural affinity for cotton fibers. The multifunctional epoxy crosslinking agent acts as a molecular bridge; its epoxy groups undergo a ring-opening reaction under heating conditions, forming an ether bond with the hydroxyl groups of the cotton fiber cellulose macromolecule at one end and binding to the amino or carboxyl groups on the silk fibroin molecular chain at the other end, permanently fixing the silk fibroin to the fiber surface through covalent bonds. After pre-drying and baking, a uniform, transparent protein film with a specific refractive index is formed on the fiber surface. This thin film fills in the microscopic grooves on the surface of the cotton fibers, transforming the incident light from diffuse reflection to a more directional, regular reflection. This gives the fabric a warm, subtle, and deep natural luster, successfully compensating for the lack of brightness caused by the absence of mercerizing. At the same time, the introduction of the protein film makes the fabric feel smoother and softer, with significantly better moisture absorption and skin-friendliness than traditional strongly alkaline mercerized fabrics.

[0030] In step S6, the finished product is set and finished. The fabric treated with silk protein is fed into a tenter frame. The tenter frame stretches the fabric laterally by clamping the edges with chains, while simultaneously heat-setting it in a high-temperature drying chamber. The drying chamber temperature is set at 150 to 160°C, and the machine speed is controlled at 30 to 40 meters per minute. Under the high temperature, the cross-linking reaction in step S5 is completely completed, and the stress inside the fibers is released, so that the fabric width, weight, and shrinkage rate meet the predetermined standards. During the setting process, an automatic pattern matching system ensures that the large jacquard pattern does not become skewed. The final finished fabric has a smooth, fuzz-free surface, bright colors, and a high-end mercerizing effect. It has a soft and supple hand feel, and no high-concentration alkaline wastewater is generated during the entire production process, achieving green production of high-quality textiles.

[0031] To further verify the technical effects of this invention, a specific implementation example is given below. 100S combed compact spun pure cotton yarn was selected, dyed, and then woven green without sizing according to the above process. In the bio-enzyme polishing step, acidic cellulase was selected at 2% of the fabric weight and treated for 60 minutes at 50℃ and pH 5.0. The weight loss rate was measured to be 3.8%, and the fabric strength retention rate reached over 95%. Subsequently, in the silk fibroin finishing stage, Nipwei SDP was used as a crosslinking agent, combined with silk fibroin for padding. Finished product testing showed that although the barium value (an indicator of mercerization) of this fabric was lower than that of traditional strongly alkaline mercerized fabrics, its luster sensory evaluation reached level 5, its hand softness was significantly better than traditional double mercerized fabrics, and after 50 washes, the luster and hand feel showed no significant change.

[0032] In the operation of this invention, there is a close logical connection between each step. The high-quality colored yarn provided in step S1 is the foundation; its compact spinning structure, combined with the bio-enzyme polishing in step S4, solves the problem of fabric smoothness. The pulpless weaving process in steps S2 and S3, while reducing environmental impact, provides a physical carrier for the luster compensation in step S5 through the structural design. Step S5 uses chemical cross-linking technology to fix biomolecules to natural fibers, achieving a qualitative change in fabric style. The entire production process, through precise control of process parameters, allows cotton fibers to achieve the visual effect of high-end mercerized fabrics through biochemical modification without undergoing severe chemical swelling and physical high-temperature burning. This production method not only significantly reduces production energy consumption and pollution, but also improves the biocompatibility of the product through the introduction of silk protein, making the final product more in line with modern consumers' pursuit of eco-friendly home textiles and a high-quality lifestyle.

[0033] In practical applications, the jacquard fabric produced by this invention is particularly suitable for high-end bedding, modern Chinese-style clothing, and upscale home décor. Its warm luster presents rich visual layers under indoor lighting, while the skin-friendly feel of the silk protein directly enhances wearing and usage comfort. Because the process avoids the damage to dye colors caused by strong alkalis, the fabric boasts extremely high color fidelity, accurately presenting various complex color combinations pre-designed by designers. Furthermore, due to the well-preserved fiber strength, the fabric maintains good shape stability even after long-term household washing and use, and is not prone to pilling or fuzzing, giving it significant market potential.

[0034] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for producing yarn-dyed silk protein pure cotton fabric, characterized in that, Includes the following steps: S1. Yarn preparation and reactive dyeing of yarn packages: Select combed compact spun cotton yarn of 80S to 120S as raw material, and combine the single yarns into ply yarn; place the ply yarn in a yarn package dyeing machine and dye it with reactive dye, and adjust the fixing temperature and time to make the dye molecules form covalent bonds with the fiber; after dyeing, perform cold water washing, acid washing neutralization, soap washing and hot water washing to remove the floating color on the fiber surface and then dry it. S2, Green Slitting Warping Without Sizing: The dyed yarn is placed on a slitting warping machine for warping without sizing. The fabric width is set to 106 inches, the warp density to 200 warp threads per inch, and the total number of warp threads to 20,964. A 300-bore arrangement is used per slitting section, and the warping displacement is set to 1.3 mm. A tension sensor monitors and feeds back to the electromagnetic braking system to control the tension fluctuation deviation of the entire warp width within ±0.5 cN. S3, Jacquard weaving process: The warp beams after warping are loaded onto an electronic jacquard loom for weaving; the temperature in the weaving workshop is controlled at 25℃ and the humidity at 65 to 75%; the loom speed is controlled at 350 to 450 revolutions per minute, and the warp and weft yarns are interwoven through the shedding mechanism to form a jacquard pattern; S4. Bio-enzyme polishing treatment: The woven fabric is placed in an overflow dyeing machine or a flat-width continuous processing machine, and bio-enzyme polishing is performed using a polishing solution. The polishing solution consists of cellulase, a penetrant, and a buffer system. The amount of cellulase is 0.5% to 5.0% of the fabric weight, and the concentration of the penetrant is 0.5 to 5.0 g / L. The temperature is controlled at 45 to 55°C, and the pH value is adjusted to 4.5 to 5.5 through the buffer system. The bio-enzyme polishing treatment time is controlled at 30 to 90 minutes, and the weight loss rate of the fabric is controlled at 3% to 5%. S5. Silk fibroin functional finishing: The fabric after bio-enzyme polishing is treated with a silk fibroin functional coating; the finishing solution contains a silk fibroin solution with a concentration of 20 g / L, a multifunctional epoxy crosslinking agent with a concentration of 200 g / L, and a magnesium chloride catalyst with a concentration of 14 g / L; the finishing is carried out by padding, and the padding rate is controlled at 70% to 80%; the finished fabric is pre-dried at 100 to 120°C and baked at 150 to 160°C for shaping. S6. Finishing and Finishing: The fabric that has completed functional finishing is stretched and set to adjust the fabric width and weight.

2. The method for producing a yarn-dyed silk protein pure cotton fabric according to claim 1, characterized in that: The combed compact spun cotton yarn selected in step S1 has a twist that is 10% to 15% higher than that of conventional cotton yarn of the same count.

3. The method for producing a yarn-dyed silk protein pure cotton fabric according to claim 1, characterized in that: The reactive dye selected in step S1 is a reactive dye with two reactive groups.

4. The method for producing a yarn-dyed silk protein pure cotton fabric according to claim 1, characterized in that: In step S2, the warping displacement is set according to the yarn diameter of 80S to 120S.

5. The method for producing a yarn-dyed silk protein pure cotton fabric according to claim 1, characterized in that: In step S3, the structure of the large jacquard pattern adopts a double warp weave or a double weft weave.

6. The method for producing a yarn-dyed silk protein pure cotton fabric according to claim 1, characterized in that: In step S4, the buffer system is an acetic acid and sodium acetate buffer system.

7. The method for producing a yarn-dyed silk protein pure cotton fabric according to claim 1, characterized in that: In step S4, the bath ratio for the bio-enzyme polishing treatment is set to 1:10 to 1:

45.

8. The method for producing a yarn-dyed silk protein pure cotton fabric according to claim 1, characterized in that: In step S4, after the weight loss rate reaches 3% to 5%, the hydrolysis reaction is terminated by heating to above 80°C to denature and inactivate the cellulase.

9. The method for producing a yarn-dyed silk protein pure cotton fabric according to claim 1, characterized in that: In step S5, the multifunctional epoxy crosslinking agent forms covalent bonds with the hydroxyl groups on cotton fibers and the amino or carboxyl groups on the silk fibroin molecular chain through a ring-opening reaction.

10. The method for producing a yarn-dyed silk protein pure cotton fabric according to claim 1, characterized in that: In step S6, an ultrasonic-assisted spraying device is used to spray functional additives onto the fabric surface, and the baking temperature of the tenter frame is controlled at 150 to 160°C, and the machine speed is controlled at 30 to 40 meters per minute.

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