Single-label vortex spinning pure polyester 30-count spun yarn

Abstract

The invention discloses a single-label vortex spinning pure terylene 30-count spun yarn, which is prepared by the following steps: step 1, raw material selection and pretreatment: firstly, selecting single-label terylene staple fibers according to the parameters of fineness, length, crimpness, oil content and specific resistance as required, and then carrying out antistatic and opening pretreatment; step 2, fore-spinning flexible carding, which comprises a scutching process, a cotton carding process and a drawing process; the slivers subjected to drawing treatment are fed into a drafting area for vortex spinning, the fineness required by 30 yarns is achieved, then vortex twisting is conducted, after twisting, the pressure and flow of compressed air of a nozzle for vortex spinning are controlled, a stable and high-speed rotating vortex field is formed around a spindle, the yarns are guided to be output through a hollow spindle, and the spinning quality is improved. The pure polyester vortex spinning method relates to the technical field of pure polyester vortex spinning, and the yarn has the quality characteristics of extremely few hairiness, good wear resistance, high strength, uniform yarn evenness and few defects.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pure polyester vortex spinning, in particular to single mull vortex spinning of pure polyester 30 count yarn. BACKGROUND

[0002] Pure polyester: refers to the raw material of the yarn as 100% polyester staple fiber. 30 count: this is the yarn fineness index in the British system, which is approximately equal to 19.7 tex. This yarn count belongs to medium fine yarn and is widely used, often used to make shirts, bed linen, workwear, etc. The main problems of the current production technology of 30 count pure polyester vortex spun yarn are: 1. Raw material (polyester staple) related problems: fiber performance fluctuation: even if it is "single mull", there may be slight fluctuations in the fiber production process; fiber oil content, specific resistance, curl stability and other indicators are crucial; improper oil content: too low will cause the fiber to be harsh, and static electricity is easy to occur during opening and carding, causing the cotton web to break and fly; too high will easily adhere to the equipment parts, forming yarn defects; high specific resistance: polyester is an insulator, and high specific resistance is easy to accumulate static electricity during production, causing fiber to wind around the roller and skin roller, sliver to be hairy, and the breakage rate to increase; fiber defects: although polyester is relatively clean, if it contains defects such as sliver, hard silk, and glue blocks, it is easy to cause breakage or form thick and thin yarn defects in high-speed vortex spinning; 2. "Flexible processing" of the pre-spinning process (carding and drawing): the goal is to fully open the fiber and evenly card it, but to minimize fiber damage; excessive beating or carding will break the fiber and produce short fibers, which cannot be effectively wrapped in vortex spinning and will become hairiness or fly, affecting yarn strength and smoothness. Quality requirements of the sliver: the sliver requires a very low short fiber rate, even yarn, good fiber separation, and good straightness; the core difficulty of vortex spinning: precise control of nozzle pressure: nozzle pressure is the key to forming a vortex; low pressure, low twisting efficiency, low yarn strength; high pressure may cause excessive friction and damage to the fiber, also affecting the strength and increasing energy consumption; it needs to be fine-tuned according to the fineness of 30 count and the fiber specifications; spindle wear and maintenance: spindle is a core consumable part; polyester fiber is hard, and long-term high-speed operation will cause wear to the spindle; once the spindle is worn, the yarn quality will deteriorate sharply (strength decreases, hairiness increases); therefore, regular detection, cleaning and replacement of the spindle are the lifeline to ensure quality stability; matching of yarn speed and draft ratio: the best process combination needs to be found to ensure that the fiber moves stably in the draft zone and is perfectly wrapped in the twisting chamber. Temperature and humidity management: temperature and humidity control in the workshop is crucial for polyester spinning; too low humidity, static problem will be very prominent; too high humidity, fiber is easy to wind, and it will affect the stability of the vortex field.

[0003] In summary, the core difficulties of the existing production technology are: 1. Control of raw material selection and consistency.

[0004] 2. Flexible carding in the front-end process to reduce fiber damage.

[0005] 3. Precise optimization and maintenance of the vortex spinning body process, especially nozzle pressure and spindle conditions.

[0006] 4. Effective prevention and control of static electricity throughout the production process. SUMMARY

[0007] To overcome the deficiencies of the prior art, the present application provides single label vortex spinning pure terylene 30 spinning, which solves the problems of large yarn quality fluctuation, large batch difference, excessive yarn hairiness, and insufficient yarn strength and wear resistance in the prior art.

[0008] To achieve the above purpose, the present application is implemented by the following technical solutions: single label vortex spinning pure terylene 30 spinning, comprising the following steps: Step one, raw material selection and pretreatment: first, select single label terylene staple according to the parameters of fineness, length, crimp degree, oil content and specific resistance, and then perform antistatic and opening pretreatment; Step two, flexible carding in the front-end process: including the processes of cleaning, carding and drawing; Step three, vortex spinning: feeding the sliver treated by drawing into the drafting zone of vortex spinning to reach the required fineness of 30 yarn, then vortex twisting, after twisting, controlling the pressure and flow of nozzle compressed air of vortex spinning to form a stable, high-speed rotating vortex field around the spindle, guiding the yarn output through the hollow spindle, and finally forming a yarn structure, and finally using the yarn leading and winding method to lead and wind the yarn into a cheese with constant tension; Step four, environment and assistance: constant temperature and humidity in the workshop, temperature 25-28°C, relative humidity 55%-65%.

[0009] Preferably: The cleaning process adopts the process principle of "light beating with multiple opening and combing instead of beating", reduces the beater speed, reduces fiber damage, and realizes full opening; The carding process adopts appropriate needle cloth configuration and lower roller-flat clearance, which reduces the formation of neps and short fibers caused by excessive rubbing of fibers while ensuring the carding degree; The drawing process adopts two or three drawing, the setting of draft ratio and roller gauge should consider the evenness of sliver and fiber protection, use high-performance anti-winding rubber roller to deal with static electricity, improve the straightness and parallelism of fibers, and ensure the uniformity of sliver weight.

[0010] Preferably, the compressed air needs to be stable, dry and clean, and an electronic yarn clearer and data acquisition device are installed in the vortex spinning process to monitor yarn breakage, remove defects, and generate quality reports in real time.

[0011] Preferably, the vortex twisting is achieved by twisting the fiber bundle with a steel ring and a steel wire coil at high speed under the high speed of the spindle to form a spiral structure. High-pressure air is used to form a vortex around the spindle to wrap and twist the fiber tail end, forming an "outer wrapping and inner straight" structure.

[0012] This invention provides a single-mark vortex-spun pure polyester 30-count yarn, which has the following beneficial effects: 1. Yarn Quality Characteristics: Minimal Hairiness: The unique yarn-forming structure of vortex spinning results in a smooth yarn surface, with significantly fewer harmful hairs (3mm or more) compared to ring spinning and rotor spinning. Excellent Abrasion Resistance: The fiber end-wrapping structure prevents fiber slippage, resulting in outstanding abrasion resistance. High Strength: Fully utilizing the inherent high strength of polyester fibers, the yarn boasts high strength. Uniform Yarn with Fewer Defects: Under good processing conditions, the yarn exhibits uniform yarn consistency, with the number of thick and thin spots, knots, and other defects kept to a low level. Crisp and Stiff Hand Feel: Compared to ring-spun yarns, it has a smoother and stiffer hand feel, but is slightly less soft.

[0013] 2. Production Process Characteristics: High Speed ​​and Efficiency: Vortex spinning speeds can reach over 500 meters per minute, resulting in extremely high production efficiency. Short Process: The roving process is eliminated, achieving a short-process production of "sliver-spinning". Stable and Consistent Quality: "Single-label spinning" ensures the consistency of raw materials, fundamentally avoiding uneven mixing and ensuring extremely stable quality within and between batches. High Degree of Automation: Automatic splicing and automatic doffing reduce reliance on manual labor and facilitate management. Detailed Implementation

[0014] The technical solutions 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 some embodiments of the present invention, and not all 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.

[0015] This invention provides a technical solution: a single-mark vortex-spun pure polyester 30-count yarn, comprising the following steps: Step 1: Raw material selection and pretreatment: First, select single-mark polyester staple fiber according to the requirements based on parameters such as fineness, length, crimp, oil content and resistivity, and then carry out antistatic and opening pretreatment. Step 2, Pre-spinning flexible carding: including cotton cleaning, carding, and drawing processes; Step 3, Vortex Spinning: The sliver that has undergone drawing is fed into the drafting zone of the vortex spinning machine to achieve the fineness required for 30-count yarn. Then, vortex twisting is performed. After twisting, the pressure and flow rate of compressed air in the nozzle of the vortex spinning machine are controlled to form a stable and high-speed rotating vortex field around the spindle. The yarn is guided out through the hollow spindle and finally forms the yarn structure. Finally, the yarn is drawn out and wound into cone yarn using a constant tension through yarn drawing and winding. Step 4, Environment and Auxiliary Measures: The workshop is kept at a constant temperature and humidity, with a temperature of 25-28°C and a relative humidity of 55%-65%. Vortex spinning: It is a new type of spinning technology following ring spinning and rotor spinning. Its core principle is to use high-speed rotating airflow to form a vortex in the spinning chamber, which twists the fiber bundle and causes the fiber tail to wrap around the yarn body, forming a unique wrapping structure. Wrapping structure: Most fibers are straight in the yarn core, and a few fibers are wrapped around the outside in a twist-free manner to lock in the hairs. The fabric surface has excellent smoothness and can achieve "sizing-free weaving". The external wrapping fibers are as strong as "chains". Single-label spinning refers to the use of raw materials from a single origin, a single batch, and of the same specification throughout the entire spinning process. This is the opposite of the existing technology of "cotton / polyester blending" on the market. Existing technology mixes raw materials from different batches in order to stabilize quality or reduce costs. Single-label spinning eliminates raw material fluctuations from the source, and the quality is highly consistent within and between batches. The components in the drafting zone (such as rollers, leather rollers, and leather rings) are smooth and free from electrostatic adsorption, ensuring stable fiber movement.

[0016] Further: The cotton cleaning process adopts the principle of "more loosening and lighter beating, and combing instead of beating" to reduce the speed of the beating hand, reduce fiber damage, and achieve full loosening; The carding process employs a suitable carding cloth configuration and a low cylinder-flat plate spacing to ensure carding efficiency while reducing excessive fiber rubbing that produces knots and short fibers. The drawing process employs two or three drawing passes. The draft ratio and roller spacing must be set to balance yarn uniformity and fiber protection. High-performance anti-winding rollers are used to deal with static electricity, improve fiber straightening and parallelism, and ensure uniform sliver weight.

[0017] Furthermore, the compressed air needs to be stable, dry, and clean. An electronic yarn clearer and data acquisition device are installed inside the vortex spinning machine to monitor yarn breaks, remove defects, and generate quality reports in real time.

[0018] Furthermore, the vortex twisting is achieved by twisting the fiber bundle with a steel ring and a steel wire coil at high speed under the high speed of the spindle to form a spiral structure. High-pressure air is used to form a vortex around the spindle to wrap and twist the fiber tail end, forming an "outer wrapping and inner straight" structure.

[0019] Those skilled in the art will process the materials in this case sequentially. The specific processing and operation sequence should refer to the following working principle. The detailed methods are well-known in the field. The following mainly introduces the working principle and process.

[0020] Example: First, single-mark polyester staple fiber is selected according to the requirements of fineness, length, crimp, oil content, and resistivity. Then, antistatic and opening pretreatment is performed, followed by cotton cleaning, carding, and drawing processes. The drawn sliver is fed into the drafting zone of the vortex spinning machine to achieve the fineness required for 30-count yarn. Then, vortex twisting is performed. After twisting, the pressure and flow rate of compressed air in the nozzle of the vortex spinning machine are controlled to form a stable and high-speed rotating vortex field around the spindle. The yarn is guided out through the hollow spindle and finally forms the yarn structure. Finally, the yarn is drawn out and wound into cone yarn using a constant tension method.

[0021] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Single mull vortex spun pure terylene 30 count spinning characterized by, It comprises the following steps: Step one, raw material selection and pretreatment: first, according to the requirements, select single mark polyester short fiber according to fineness, length, crimp degree, oil content and specific resistance, and then carry out antistatic and opening pretreatment; Step two, flexible carding: including cleaning process, carding process and drawing process; Step three, vortex spinning: the sliver treated by drawing is fed into the drafting zone of vortex spinning, so as to reach the required fineness of 30 yarns, then vortex twisting is carried out, after twisting, the pressure and flow of compressed air of the nozzle of vortex spinning are controlled to form a stable, high-speed rotating vortex field around the spinning spindle, the yarn is guided out through the hollow spindle, and finally the yarn structure is formed, finally the yarn is drawn out and wound into a cheese with constant tension using the yarn leading and winding method; Step four, environment and auxiliary: constant temperature and humidity in workshop, temperature 25-28°C, relative humidity 55%-65%.

2. The single mark vortex spinning pure polyester 30 yarn according to claim 1, characterized in that: The cleaning process adopts the process principle of "loose beating and light beating, replacing beating with carding", reduces the beater speed, reduces the fiber damage, and realizes sufficient opening; The carding process adopts appropriate needle cloth configuration and lower roller-flat clearance, reduces the formation of neps and short fibers caused by excessive rubbing of fibers while ensuring the carding degree; The drawing process adopts two or three drawing, the setting of draft ratio and roller clearance should consider the evenness of sliver and fiber protection, use high-performance anti-winding rubber roller to deal with static electricity, improve the straightness of fibers, and ensure the uniformity of sliver weight.

3. The single mag Spun Yarn Pure Polyester 30 count yarn as claimed in claim 1 wherein, The compressed air needs to be stable, dry and clean, electronic yarn clearer and data collector are set in the vortex spinning, real-time monitoring of broken ends and defect cutting, and quality report is generated.

4. The single mag Spun Yarn Pure Polyester 30 count yarn of claim 1, wherein, The vortex twisting is true twisting of fiber bundle by ring and traveler under high-speed rotation of spindle, forming a spiral structure, and high-pressure air forms a vortex around the spindle, wrapping and twisting the tail end of the fiber, forming an "outer wrapping and inner straight" structure.