Mercerized cotton knitted fabric production process and equipment

Abstract

The invention discloses a mercerized cotton knitted fabric production process and equipment, and relates to the technical field of knitted fabric production. Comprising the following steps: S1, selecting cotton yarns, and weaving the cotton yarns into gray fabric; s2, singeing the gray fabric through singeing equipment, and then leveling and cooling the gray fabric; s3, pretreatment of the grey cloth: soaking the grey cloth in a solution with 0.8% pectinase and pH of 5.5, and treating the grey cloth at 45 DEG C for 40 minutes to remove impurities; and microwave treatment: setting the output power of microwave equipment at 300-500W, and irradiating the gray fabric for three minutes to enlarge the micropores on the surface of the fiber. In the production process, enzyme molecules are used for selectively hydrolyzing a fiber amorphous region, the alkali dosage is reduced, meanwhile, the fiber swelling uniformity is improved, microwave irradiation is conducted on grey cloth before mercerizing, a wax layer on the fiber surface is damaged, alkali liquor permeation is promoted, the pH value of wastewater is reduced, the wastewater can be directly subjected to biochemical treatment, bio-enzyme catalysis and low-alkali mercerizing are combined, and the mercerizing effect is improved. The reaction efficiency is enhanced through microwave pretreatment, and the technical bottleneck of a traditional high-alkali process is broken through.

Description

Technical Field

[0001] This invention relates to the field of knitted fabric production technology, specifically to a process and equipment for producing mercerized cotton knitted fabric. Background Technology

[0002] Knitted fabrics are woven fabrics created by bending yarns into loops and interlocking them using knitting needles. They are widely used in clothing fabrics and linings. Mercerized cotton knitted fabric is a high-quality fabric that combines mercerizing treatment and knitting technology. It combines the natural comfort of cotton with the unique properties of mercerized fabric. Its core characteristics are strong luster, softness against the skin, toughness and durability, moisture absorption and breathability, and bright color. In the traditional production process of mercerized cotton knitted fabric, high-concentration caustic soda is used to treat cotton fibers or fabrics. Although this can improve the luster, it has the following drawbacks: highly alkaline wastewater, high treatment costs, high alkali damage to fibers, resulting in a stiff hand feel, requiring multiple washes, high energy consumption, and poor luster durability. The alkali concentration of cotton knitted fabric is easily weakened by friction or washing. Existing improvements mainly focus on alkali recovery or finishing agents, but they do not fundamentally solve the contradiction between alkali concentration and fiber damage. In addition, the production process of mercerized cotton knitted fabric requires a singeing process to remove short and loose fibers from the surface of the fabric. In the existing technology, the flame extends after contacting the fabric, and the contact time between the fabric and the fire is relatively long, which can easily cause the fabric to be singed too severely or burned through. Double-sided processing requires two passes through the machine, resulting in low production efficiency. At the same time, the post-singing processing, leveling and cooling, requires multiple machines to work together, resulting in high equipment occupancy. Therefore, a production process and equipment for mercerized cotton knitted fabric is proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a process and equipment for producing mercerized cotton knitted fabrics in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention specifically adopts the following technical solution: One objective of this invention is to provide a production process for mercerized cotton knitted fabric, comprising the following steps: S1: Select cotton yarn and weave it into greige fabric; S2: The fabric is singed using a singeing device, followed by leveling and cooling; S3: Fabric pretreatment: The fabric is immersed in a solution of 0.8% pectinase and pH 5.5 and treated at 45°C for 40 minutes to remove impurities; Microwave treatment: The output power of the microwave equipment is set to 300-500W, and the fabric is irradiated with microwave equipment for three minutes to expand the micropores on the fiber surface. S4: Low-alkali-enzyme synergistic mercerizing, the treatment solution is prepared as follows: NaOH 8-12%, cellulase 0.5-1.5g / L, penetrant JFC 3g / L; padding treatment, the greige fabric is impregnated with the treatment solution and squeezed through the rollers (residual rate 85%), repeated twice to fully absorb the treatment solution, and then the greige fabric is put into the mercerizing machine for dynamic temperature control. S5: Neutralization wash, immerse the fabric in a neutralization solution with a citric acid concentration of 0.5-1.0% and a temperature of 25-30℃ for 10-15 minutes; remove the fabric and wash it twice. S6: Softening finishing, the greige fabric is immersed in a finishing solution of 15g / L modified amino silicone oil emulsion and 3g / L chitosan solution (dissolved in 1% acetic acid), treated at 58-62℃ for 20 minutes, and then dried and shaped to obtain mercerized cotton knitted fabric.

[0005] Furthermore, in step S4, the dynamic temperature control is 50℃ for 5 minutes, 30℃ for 8 minutes, and 10℃ for rapid cooling and shaping for 1 minute.

[0006] The second objective of this invention is to provide a production equipment for mercerized cotton knitted fabric, applied to the aforementioned mercerized cotton knitted fabric production process, comprising: The machine housing contains two first guide rollers and three second guide rollers that rotate synchronously in opposite directions. The machine housing also contains two fixed cylinders, a scraping component, a steam ironing component, and an air-cooling component. The two fixed cylinders respectively contact and overlap the two sides of the fabric. The fixed cylinders are equipped with flame-spitting components. The scraping component scrapes and cleans both sides of the fabric, the steam ironing component irons and flattens the fabric, and the air-cooling component cools both sides of the fabric.

[0007] Furthermore, two rotating rods are rotatably mounted on the chassis, and the two rotating rods are connected by a gear pair. The first guide roller and the rotating rods are connected by a pulley assembly.

[0008] Furthermore, the flame-throwing component includes an atomizing tube disposed within a fixed cylinder, a nozzle disposed on the atomizing tube, an igniter disposed at the outlet of the nozzle, a gas valve connected to the free end of the atomizing tube, and a gas pipe connected to the gas valve.

[0009] Furthermore, the chassis is equipped with two synchronously sliding adjustment plates, and two fixed cylinders are respectively installed on the two adjustment plates.

[0010] Furthermore, the scraping component includes a first inclined scraper and a guide cylinder, both disposed within the machine housing. The guide cylinder has a guiding inclined surface, and a second inclined scraper is disposed on the guide cylinder. The first and second inclined scrapers have opposite inclination directions and respectively abut and overlap with the two sides of the fabric.

[0011] Furthermore, the steam ironing device includes a water tank mounted on a machine casing, an air outlet connected to the water tank, multiple heating tubes inside the water tank, and an exhaust pipe slidably mounted inside the machine casing. The air outlet and exhaust pipe respectively contact and overlap with both sides of the fabric.

[0012] Furthermore, the air-cooled component includes two air ducts both disposed inside the chassis, the free end of the fabric passing through the space between the two air ducts, the air ducts having multiple air outlet holes with progressively increasing diameters, and the chassis having a first T-connector pipe, the two ends of which are respectively connected to the two air ducts.

[0013] Furthermore, the chassis is equipped with a fan and an air inlet pipe. The air outlet of the fan is connected to a second T-connector. The two ends of the second T-connector are respectively connected to a first T-connector and an air inlet pipe. One of the first guide rollers has a cavity. The free end of the air inlet pipe is connected to the first guide roller through a first rotary joint. The free end of the first guide roller is connected to a fixed pipe through a second rotary joint. Multiple heating pipes are all connected to the fixed pipe.

[0014] The beneficial effects of this invention are as follows: In the production process, this invention utilizes enzyme molecules to selectively hydrolyze the non-crystalline regions of fibers, reducing the amount of alkali used and improving the uniformity of fiber swelling. Before mercerizing, the fabric is subjected to microwave irradiation to destroy the wax layer on the fiber surface, promote the penetration of alkali solution, and reduce the pH value of wastewater, which can be directly biochemically treated. By combining bio-enzyme catalysis with low-alkali mercerizing and enhancing reaction efficiency through microwave pretreatment, this invention breaks through the technical bottleneck of traditional high-alkali processes and achieves synergistic optimization in terms of environmental protection, energy consumption, and product performance, thus making it more practical.

[0015] This invention integrates singeing, cleaning, leveling, and cooling. When singeing the fabric, it can prevent the flame from spreading after contacting the fabric, ensuring that the contact time between the fabric and the fire is not too long, thereby reducing the risk of the fabric being singed too severely or burned through. At the same time, double-sided processing eliminates the need for secondary processing, improving production efficiency. Post-processing does not require multiple machines to work together, reducing equipment occupancy, thus making it more practical. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural view of the device of the present invention; Figure 2 This is a three-dimensional sectional view of the present invention; Figure 3 This is the present invention. Figure 2 Enlarged view of point A in the middle; Figure 4 This is the present invention. Figure 2 Enlarged view of point B in the middle; Figure 5 This is the present invention. Figure 2Enlarged view of point C in the middle; Figure 6 This is a three-dimensional sectional view of the present invention from another perspective; Figure 7 This is the present invention. Figure 6 Enlarged view at point D; Figure 8 This is the present invention. Figure 6 Enlarged view at point E in the middle; Figure 9 This is another perspective sectional view of the present invention; Figure 10 This is a three-dimensional view of part of the structure of the present invention; Figure 11 This is a three-dimensional view of another part of the structure of the present invention.

[0017] Reference numerals: 1. Chassis; 2. First guide roller; 3. Second guide roller; 4. Fixed cylinder; 5. Rotating rod; 6. Gear pair; 7. Pulley assembly; 8. Atomizing tube; 9. Nozzle; 10. Ignition device; 11. Gas valve; 12. Gas pipe; 13. Adjusting plate; 14. First inclined scraper; 15. Guide cylinder; 16. Second inclined scraper; 17. Water tank; 18. Gas outlet; 19. Heating tube; 20. Exhaust pipe; 21. Air duct; 22. Air outlet; 23. First tee pipe; 24. Fan; 25. Air inlet pipe; 26. Second tee pipe; 27. Cavity; 28. First rotary joint; 29. ​​Second rotary joint; 30. Fixed pipe. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0019] An embodiment of the present invention provides a production process for mercerized cotton knitted fabric, comprising the following steps: S1: Select cotton yarn and weave it into greige fabric; S2: The fabric is singed using a singeing device, followed by leveling and cooling; S3: Fabric pretreatment: The fabric is immersed in a solution of 0.8% pectinase and pH 5.5 and treated at 45°C for 40 minutes to remove impurities; Microwave treatment: The output power of the microwave equipment is set to 300-500W, and the fabric is irradiated with microwave equipment for three minutes to expand the micropores on the fiber surface. S4: Low-alkali-enzyme synergistic mercerizing, the treatment solution is prepared as follows: NaOH 8-12%, cellulase 0.5-1.5g / L, penetrant JFC 3g / L; padding treatment, the greige fabric is impregnated with the treatment solution and squeezed through the rollers (residual rate 85%), repeated twice to fully absorb the treatment solution, and then the greige fabric is put into the mercerizing machine for dynamic temperature control. S5: Neutralization wash, immerse the fabric in a neutralization solution with a citric acid concentration of 0.5-1.0% and a temperature of 25-30℃ for 10-15 minutes; remove the fabric and wash it twice. S6: Softening finishing, the greige fabric is immersed in a finishing solution of 15g / L modified amino silicone oil emulsion and 3g / L chitosan solution (dissolved in 1% acetic acid), treated at 58-62℃ for 20 minutes, and then dried and shaped to obtain mercerized cotton knitted fabric. In the production process, this invention utilizes enzyme molecules to selectively hydrolyze the non-crystalline regions of fibers, reducing the amount of alkali used and improving the uniformity of fiber swelling. Before mercerizing, the fabric is subjected to microwave irradiation to destroy the wax layer on the fiber surface, promote the penetration of alkali solution, and reduce the pH value of wastewater, which can be directly biochemically treated. By combining bio-enzyme catalysis with low-alkali mercerizing and enhancing reaction efficiency through microwave pretreatment, this invention breaks through the technical bottleneck of traditional high-alkali processes and achieves synergistic optimization in terms of environmental protection, energy consumption, and product performance, thus making it more practical.

[0020] The invention discloses a further technical solution in step S4, wherein the dynamic temperature control is 50°C for 5 minutes, 30°C for 8 minutes, and 10°C for rapid cooling and shaping for 1 minute. The temperature gradient induces directional shrinkage of the fiber, thereby enhancing the gloss reflectivity.

[0021] like Figures 1-11 As shown, an embodiment of the present invention provides a mercerized cotton knitted fabric production equipment, applied to the above-mentioned mercerized cotton knitted fabric production process, comprising: The machine housing 1 contains two first guide rollers 2 and three second guide rollers 3 that rotate synchronously in opposite directions. The axes of the first guide rollers 2 and the second guide rollers 3 are both horizontal. The fabric passes sequentially over one second guide roller 3, one first guide roller 2, another first guide roller 2, and the remaining two second guide rollers 3. The machine housing 1 also contains two fixed cylinders 4, a scraping component, a steam ironing component, and an air-cooling component. The fixed cylinders 4 have a U-shaped cross-section. One fixed cylinder 4 is located below one of the first guide rollers 2, and the other fixed cylinder 4 is located below the first guide roller 2. The cylinder 4 is located above another first guide roller 2. The two fixed cylinders 4 are respectively in contact with and overlap the two sides of the fabric. The fixed cylinder 4 is equipped with a flame-spitting component. The flame-spitting component sprays flames to singe the fabric and remove short and loose fibers from the surface of the fabric. The two sides of the fabric are scraped and cleaned by a scraper. After the fabric is singeed, there will be residue on the surface of the fabric. The residue on both sides of the fabric is scraped and cleaned by the scraper to avoid affecting subsequent operations. The fabric is ironed and flattened by a steam ironing component and cooled on both sides by an air-cooling component. During use, the fabric passes around the second guide roller 3 and the first guide roller 2 in sequence along a specific path to form an "S" shaped material path. The specific operation process is as follows: First, a traction force is applied to the free end of the fabric, driving the two first guide rollers 2 to rotate in opposite directions synchronously. At this time, the fabric drives the three second guide rollers 3 to rotate in opposite directions synchronously during the conveying process, forming a stable multi-level tension control system. Under this dynamic operating state, the fabric travels in contact with the two U-shaped fixed cylinders 4 on both sides. The singeing process adopts a double-sided alternating operation mode: the flame-spraying components built into the two fixed cylinders 4 respectively apply flame treatment to the front and back sides of the fabric. In particular, the U-shaped structure design of the fixed cylinders 4 forms a physical barrier, which can limit the flame action area to a preset range, effectively preventing the flame from spreading along the fabric surface. While removing loose fibers on the surface, the risk of burning the fabric surface is reduced. After the fabric is singeed on one side, the scraper immediately removes the residue from the treated surface mechanically. Then, the fabric is ironed and flattened by the steam ironing component, and then the fabric is cooled on both sides by the air-cooling component, completing the cooling, shaping and drying processes simultaneously. In summary, this invention integrates singeing, cleaning, leveling, and cooling. When singeing the fabric, it can prevent the flame from spreading after contacting the fabric, ensuring that the contact time between the fabric and the fire is not too long, thereby reducing the risk of the fabric being singed too severely or burned through. At the same time, the double-sided processing eliminates the need for secondary processing, improving production efficiency. The post-processing process does not require multiple machines to work together, reducing equipment occupancy, thus making it more practical.

[0022] like Figure 10 As shown, a further technical solution of the present invention is disclosed. Two rotating rods 5 are rotatably arranged on the chassis 1. The axes of the two rotating rods 5 are both horizontal and spaced apart. The two rotating rods 5 are connected by a gear pair 6. The two rotating rods 5 form a meshing transmission mechanism through the gear pair 6. Specifically, the gear pair 6 is composed of meshing gears respectively fixed to the shaft ends of the two rotating rods 5, realizing a 1:1 reverse transmission between the rotating rods 5. The first guide roller 2 and the rotating rods 5 are connected by a pulley assembly 7. The pulley assembly 7 includes a driving wheel fixed to the rotating rod 5, a driven wheel fixed to the first guide roller 2, and a transmission belt sleeved on both, forming a same-direction transmission relationship. Referring to the above, during use, one of the rotating rods 5 is driven to rotate around its axis. Through the meshing transmission of the gear pair 6, the other rotating rod 5 will immediately generate a reverse rotation at the same speed. During this process, the rotational torque of each rotating rod 5 is transmitted to the first guide roller 2 through the corresponding pulley assembly 7. Due to the same-direction characteristic of belt drive, the direction of each first guide roller 2 is consistent with its driving rotating rod 5, ultimately forming a synchronous reverse rotational motion of the two first guide rollers 2. This transmission chain design, through the organic combination of rigid gear drive and flexible belt drive, not only ensures the accuracy of reverse transmission, but also realizes the buffer adjustment of power transmission, effectively ensuring the synchronicity and controllable direction of the two first guide rollers 2.

[0023] like Figures 3-11 As shown, the specific structure of the flame-throwing component of the present invention is disclosed. The flame-throwing component includes an atomizing tube 8 disposed in a fixed cylinder 4. The atomizing tube 8 is horizontal and fixed in the fixed cylinder 4. A nozzle 9 is disposed on the atomizing tube 8. The nozzle 9 has a slit structure and is fixed on the atomizing tube 8. The nozzle 9 faces the first guide roller 2. An igniter 10 is disposed at the outlet of the nozzle 9. The igniter 10 is fixed at the outlet of the nozzle 9. A gas valve 11 is connected to the free end of the atomizing tube 8. The gas flow rate can be controlled by the gas valve 11, thereby controlling the size of the flame. A gas pipe 12 is connected to the gas valve 11. The free end of the gas pipe 12 is connected to a high-pressure gas source. Referring to the above, during use, high-pressure gas is delivered to gas valve 11 through gas pipe 12. The gas flow rate is linearly controlled by gas valve 11. After the gas enters atomizing pipe 8, it is pneumatically atomized under the action of Venturi effect to form a uniform gas-air mixture. During the process of the mixture being accelerated out through slit nozzle 9, continuous electric arc ignition is performed by igniter 10 to form a stable ribbon flame, which singes the fabric.

[0024] like Figures 3-11 As shown, a further technical solution of the present invention is disclosed. The chassis 1 is equipped with two synchronously reverse sliding adjustment plates 13. The adjustment plates 13 slide in the vertical direction. The chassis 1 is rotatably provided with a vertically oriented positive and negative lead screw. The two adjustment plates 13 are respectively threaded with the positive and negative thread sections of the positive and negative lead screw. The two fixed cylinders 4 are respectively disposed on the two adjustment plates 13 and fixed on the two adjustment plates 13. Referring to the above, in the initial state, the two adjusting plates 13 are far apart from each other, and the two fixed cylinders 4 are far away from the two first guide rollers 2 respectively. At this time, a sufficient gap is formed between the fixed cylinders 4 and the first guide rollers 2 so that the fabric can pass around the first guide rollers 2. Then, the positive and negative screws are driven to rotate in the forward direction. The two adjusting plates 13 slide in opposite directions synchronously to approach each other due to the action of the positive and negative screws, which drives the fixed cylinders 4 to move and collide with the fabric.

[0025] like Figure 4 As shown, the specific structure of the scraping component of the present invention is disclosed. The scraping component includes a first inclined scraper 14 and a guide cylinder 15, both of which are disposed in the housing 1. The first inclined scraper 14 and the guide cylinder 15 are both fixed in the housing 1. A guide inclined surface is constructed inside the guide cylinder 15. A second inclined scraper 16 is disposed on the guide cylinder 15. The second inclined scraper 16 is fixed on the guide cylinder 15. The first inclined scraper 14 and the second inclined scraper 16 have opposite inclination directions and respectively abut and overlap with the two sides of the fabric. Referring to the above, after the fabric is singed on one side, the first inclined scraper 14 is used to clean and scrape the treated surface to remove residue. Then the treated surface comes into contact with another first guide roller 2. After the other side of the fabric is singed, the second inclined scraper 16 is used to clean and scrape the treated surface to remove residue. The residue falls into the guide cylinder 15 along the inclined direction of the second inclined scraper 16. The guide inclined surface then guides the residue a second time so that the residue is discharged from the guide cylinder 15.

[0026] like Figures 1-5 As shown, the specific structure of the steam ironing component of the present invention is disclosed. The steam ironing component includes a water tank 17 disposed on the machine housing 1. The water tank 17 is fixedly disposed on the machine housing 1. A water inlet pipe is connected to the water tank 17. In actual use, a valve should be installed on the water inlet pipe. An air outlet 18 is connected to the water tank 17. The air outlet 18 is vertical and fixed at the top of the water tank 17. A plurality of heating tubes 19 are disposed inside the water tank 17. The heating tubes 19 are horizontal and fixed at the bottom inside the water tank 17. An exhaust pipe 20 is slidably disposed inside the machine housing 1. The exhaust pipe 20 slides in the vertical direction. The exhaust pipe 20 and the air outlet 18 abut and overlap, and both have steam channels constructed inside. The air outlet 18 and the exhaust pipe 20 abut and overlap with the two sides of the fabric respectively. Referring to the above, in the initial state, the exhaust pipe 20 is in the initial position and overlaps with the air outlet pipe 18. In use, the exhaust pipe 20 is slid upwards away from the air outlet pipe 18, allowing the fabric to pass between the exhaust pipe 20 and the air outlet pipe 18. Then, the exhaust pipe 20 is released, and it falls due to gravity. The exhaust pipe 20 and the air outlet pipe 18 overlap with the two sides of the fabric respectively, applying pressure to the fabric. Water is added to the water tank 17 through the water inlet pipe, and then the valve is closed, causing the heating pipe 19 to heat up and heat the water. After the water boils, steam is generated. The steam rises and enters the steam channel and penetrates the fabric. Through the combined action of steam and pressure, the fabric is steam ironed and smoothed.

[0027] like Figures 1-9 As shown, the specific structure of the air-cooled component of the present invention is disclosed. The air-cooled component includes two air ducts 21, both of which are disposed in the housing 1. The air ducts 21 are horizontal and fixed in the housing 1. The two air ducts 21 are distributed vertically at intervals. The free end of the fabric passes through the space between the two air ducts 21. The air ducts 21 are constructed with a plurality of air outlet holes 22 with progressively increasing diameters. The air outlet holes 22 face the fabric. The housing 1 is provided with a first three-way pipe 23, which is fixed in the housing 1. One end of the first three-way pipe 23 is connected to the two air ducts 21 respectively. The diameter of the air outlet hole 22 near the connection between the first three-way pipe 23 and the air duct 21 is smaller, and the diameter of the air outlet hole 22 away from the connection is progressively larger. Referring to the above, during use, accelerated air is supplied into the first three-way pipe 23. The air is split into two streams in the first three-way pipe 23 and enters two air ducts 21 respectively. Then, the air is blown out onto the surface of the fabric through multiple air outlets 22. Through the design of the multiple air outlets 22 with progressively increasing diameters, the air velocity and flow rate blown out by the multiple air outlets 22 can be kept basically consistent, so as to achieve double-sided cooling of the fabric and simultaneously complete the cooling, shaping and drying processes.

[0028] like Figures 1-8 As shown, a further technical solution of the present invention is disclosed. A fan 24 and an air inlet pipe 25 are provided on the casing 1. Both the fan 24 and the air inlet pipe 25 are fixed on the casing 1. The air outlet end of the fan 24 is connected to a second three-way pipe 26. The two ends of the second three-way pipe 26 are respectively connected to a first three-way pipe 23 and an air inlet pipe 25. A cavity 27 is constructed on one of the first guide rollers 2. The free end of the air inlet pipe 25 is connected to the first guide roller 2 through a first rotary joint 28. The free end of the first guide roller 2 is connected to a fixed pipe 30 through a second rotary joint 29. When the first guide roller 2 rotates, the first rotary joint 28 and the second rotary joint 29 can prevent the air inlet pipe 25 and the fixed pipe 30 from being twisted. Multiple heating pipes 19 are all connected to the fixed pipe 30. Referring to the above, when in use, the fan 24 is activated, causing outside air to accelerate into the second three-way pipe 26. The outside air is split into two streams in the second three-way pipe 26 and enters the first three-way pipe 23 and the air inlet pipe 25 respectively. The air in the air inlet pipe 25 passes through the first rotary joint 28, the cavity 27, the second rotary joint 29, the fixed pipe 30, and multiple heating pipes 19 in sequence. When the air passes through the cavity 27, heat is transferred through the first guide roller 2, heating the air and forming hot air. The hot air heats up the multiple heating pipes 19, thereby heating the water. This not only makes it more convenient to use, but also recovers and utilizes heat.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A manufacturing process for mercerized cotton knitted fabric, characterized in that, Includes the following steps: S1: Select cotton yarn and weave it into greige fabric; S2: The fabric is singed using a singeing device, followed by leveling and cooling; S3: Fabric pretreatment: The fabric is immersed in a solution of 0.8% pectinase and pH 5.5 and treated at 45°C for 40 minutes to remove impurities; Microwave treatment: The output power of the microwave equipment is set to 300-500W, and the fabric is irradiated with microwave equipment for three minutes to expand the micropores on the fiber surface. S4: Low-alkali-enzyme synergistic mercerizing, the treatment solution is prepared as follows: NaOH 8-12%, cellulase 0.5-1.5g / L, penetrant JFC 3g / L; padding treatment, the greige fabric is impregnated with the treatment solution and squeezed through the rollers (residual rate 85%), repeated twice to fully absorb the treatment solution, and then the greige fabric is put into the mercerizing machine for dynamic temperature control. S5: Neutralization wash, immerse the fabric in a neutralization solution with a citric acid concentration of 0.5-1.0% and a temperature of 25-30℃ for 10-15 minutes; remove the fabric and wash it twice. S6: Softening finishing, the greige fabric is immersed in a finishing solution of 15g / L modified amino silicone oil emulsion and 3g / L chitosan solution (dissolved in 1% acetic acid), treated at 58-62℃ for 20 minutes, and then dried and shaped to obtain mercerized cotton knitted fabric.

2. The production process of mercerized cotton knitted fabric according to claim 1, characterized in that, In step S4, the dynamic temperature control is 50℃ for 5 minutes, 30℃ for 8 minutes, and 10℃ for rapid cooling and shaping for 1 minute.

3. A mercerized cotton knitted fabric production equipment, applied to the mercerized cotton knitted fabric production process described in claim 1, characterized in that, include: The machine housing (1) is equipped with two first guide rollers (2) and three second guide rollers (3) that rotate synchronously in opposite directions. The machine housing (1) is equipped with two fixed cylinders (4), a scraping component, a steam ironing component and an air cooling component. The two fixed cylinders (4) respectively contact and overlap with the two sides of the fabric. The fixed cylinders (4) are equipped with a flame-spitting component. The scraping component scrapes and cleans the two sides of the fabric, the steam ironing component irons and flattens the fabric, and the air cooling component cools the fabric on both sides.

4. The mercerized cotton knitted fabric production equipment according to claim 3, characterized in that, Two rotating rods (5) are rotatably mounted on the chassis (1). The two rotating rods (5) are connected by a gear pair (6). The first guide roller (2) and the rotating rods (5) are connected by a pulley assembly (7).

5. The mercerized cotton knitted fabric production equipment according to claim 3, characterized in that, The flame-throwing component includes an atomizing tube (8) disposed inside a fixed cylinder (4), a nozzle (9) disposed on the atomizing tube (8), an igniter (10) disposed at the outlet of the nozzle (9), a gas valve (11) connected to the free end of the atomizing tube (8), and a gas pipe (12) connected to the gas valve (11).

6. The mercerized cotton knitted fabric production equipment according to claim 3, characterized in that, The chassis (1) is equipped with two synchronously sliding adjustment plates (13), and two fixed cylinders (4) are respectively set on the two adjustment plates (13).

7. The mercerized cotton knitted fabric production equipment according to claim 3, characterized in that, The scraping component includes a first inclined scraper (14) and a guide cylinder (15) both disposed inside the housing (1). The guide cylinder (15) has a guide inclined surface and a second inclined scraper (16) is disposed on the guide cylinder (15). The first inclined scraper (14) and the second inclined scraper (16) have opposite inclination directions and respectively abut and overlap with the two sides of the fabric.

8. The mercerized cotton knitted fabric production equipment according to claim 3, characterized in that, The steam ironing device includes a water tank (17) installed on the machine housing (1), an air outlet (18) connected to the water tank (17), a plurality of heating tubes (19) installed inside the water tank (17), and an exhaust pipe (20) slidably installed inside the machine housing (1). The air outlet (18) and the exhaust pipe (20) respectively contact and overlap with the two sides of the fabric.

9. The mercerized cotton knitted fabric production equipment according to claim 8, characterized in that, The air-cooled component includes two air ducts (21) both installed inside the casing (1). The free end of the fabric passes between the two air ducts (21). The air ducts (21) are equipped with multiple air outlets (22) with progressively increasing diameters. The casing (1) is provided with a first three-way pipe (23). Both ends of the first three-way pipe (23) are connected to the two air ducts (21) respectively.

10. The mercerized cotton knitted fabric production equipment according to claim 9, characterized in that, The casing (1) is provided with a fan (24) and an air inlet pipe (25). The air outlet of the fan (24) is connected to a second three-way pipe (26). The two ends of the second three-way pipe (26) are respectively connected to a first three-way pipe (23) and an air inlet pipe (25). A cavity (27) is constructed on one of the first guide rollers (2). The free end of the air inlet pipe (25) is connected to the first guide roller (2) through a first rotary joint (28). The free end of the first guide roller (2) is connected to a fixed pipe (30) through a second rotary joint (29). Multiple heating pipes (19) are all connected to the fixed pipe (30).

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