A cotton soft yarn, a cotton soft thread, a fabric and a preparation method thereof

Abstract

The application discloses a cotton soft yarn, a cotton soft thread, a fabric and a preparation method thereof, and discloses a preparation method of the cotton soft yarn, which comprises the following steps: sequentially subjecting pure cotton fibers to opening and cleaning, carding, first drawing, first roving and first spinning to prepare a cotton core yarn with an S twist direction, wherein during the first spinning, a ring with a large friction force with a ring traveler is adopted, so that the winding linear speed of the cotton core yarn is greater than 1.5% of the spindle linear speed, and thus multiple winding and less twisting spinning under high-speed spinning is realized; sequentially subjecting the pure cotton fibers to a carding combination, combing, second drawing and second roving to prepare a combed cotton roving; and subjecting the cotton core yarn with the S twist direction and the combed cotton roving to second spinning to prepare the required cotton soft yarn, wherein during the second spinning, the cotton core yarn and the combed cotton roving are subjected to core-spun plying, and Z twist twisting which interacts with the S twist direction of the cotton core yarn is applied in the second spinning.

Description

Technical Field

[0001] This application relates to the field of apparel and textile technology, specifically to a cotton yarn, cotton thread, fabric, and its preparation method. Background Technology

[0002] Currently, with the development of society and the economy and the continuous improvement of people's living standards, consumers are increasingly focusing on the fashion and functionality of clothing textiles, in addition to pursuing comfort. They seek unique styles and various functions, such as antibacterial and antistatic properties. To meet this consumer demand, continuously developing new yarns and fabrics has become an important task for the textile industry. With the development of science and technology, competition in the textile market is becoming increasingly fierce. To maximize profits, manufacturers are constantly moving towards higher-end, higher-quality, more technologically advanced, and higher-value-added products.

[0003] Fabrics woven from soft yarns possess skin-friendly, moisture-wicking, breathable, and warm properties, making them widely used in sportswear, casual wear, underwear, sleepwear, and infant products. The developed ultra-soft stretch denim fabric combines the soft, comfortable feel of ultra-soft cotton stretch fabrics with high elasticity, shaping, moisture-wicking, and breathability. The pure cotton knit sweaters produced have low torque, minimal fuzz, and a unique cashmere-like feel. Therefore, developing yarns with soft properties is becoming increasingly important.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] Currently, the development of soft yarns mainly employs false twist technology, used to spin yarns with a twist 20-30% lower than normal. However, this false twist technology results in lower yarn strength.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0008] This disclosure provides a cotton yarn, a cotton thread, a fabric, and a method for preparing the same, which improves the yarn strength while giving it softness.

[0009] In some embodiments, the method for preparing the cotton yarn includes:

[0010] Pure cotton fibers are sequentially processed through opening and cleaning, carding, first drawing, first roving and first spinning to obtain S-twist cotton core yarn. In the first spinning process, a steel ring and a steel wire traveler with high friction between them are used so that the winding speed of the cotton core yarn reaches more than 1.5% of the spindle speed, thereby realizing high-speed spinning with multiple windings and less twisting.

[0011] Combed cotton roving is made by sequentially processing pure cotton fibers through a cleaning and carding unit, combing, second drawing, and second roving.

[0012] The desired soft cotton yarn is produced by spinning S-twist cotton core yarn and combed cotton roving together in a second spinning process. During the second spinning process, the cotton slivers obtained after drafting the cotton core yarn and combed cotton roving are core-wound and twisted together, so that the cotton core yarn continues to be twisted in the S-twist direction under the action of the unwinding winding force. In the second spinning process, Z-twist is applied, which interacts with the S-twist direction of the cotton core yarn, so that the applied Z-twist direction interacts with the S-twist direction of the cotton core yarn.

[0013] Optionally, the clearing includes:

[0014] Pre-rolling treatment and cotton cleaning before rolling;

[0015] The pre-rolling treatment includes disc cotton grabbing, cotton mixing and opening, and vibration feeding; the cotton cleaning and rolling includes feeding, opening and rolling.

[0016] Optionally, the spooling equipment used in the cotton cleaning and spooling process includes a feeding section, an opening section, and a spooling section, wherein the opening section is located in front of the feeding section, and the spooling section is located in front of the opening section.

[0017] Optionally, the feeding unit includes:

[0018] The upper feed roller includes a cylindrical feed roller shaft with a feed roller sleeve mounted on it. The feed roller sleeve includes a left feed roller sleeve, a middle feed roller sleeve, and a right feed roller sleeve, which are close together. The left feed roller sleeve, the middle feed roller sleeve, and the right feed roller sleeve are connected to the feed roller shaft via bearings, thereby allowing the connected left feed roller sleeve, the middle feed roller sleeve, and the right feed roller sleeve to rotate freely.

[0019] The lower feed roller includes a cylindrical feed roller shaft with feed roller sleeves mounted on it. The feed roller sleeves include a left feed roller sleeve, a middle feed roller sleeve, and a right feed roller sleeve, which are tightly abutted against each other. Each of the three feed roller sleeves is connected to the feed roller shaft via bearings, allowing them to rotate freely. Furthermore, each feed roller sleeve is driven to rotate by a left motor, a middle motor, and a right motor via a left drive belt, a middle drive belt, and a right drive belt, respectively.

[0020] Multiple pressure sensors are equally spaced along the length of the left, middle, and right feed roller sleeves. The left, middle, and right motors, as well as each pressure sensor, are communicatively connected to a programmable logic controller.

[0021] Optionally, the loosening section adopts a combined beater, which includes multiple beater arms, each of which includes a rectangular blade, a serrated blade, and a comb blade.

[0022] Optionally, the carding process includes:

[0023] The prepared cotton fiber roll is fed into the feed plate and feed roller, so that the cotton fibers in the cotton fiber roll are completely transferred to the licker-in roller.

[0024] Cotton fibers are stripped by the needle cloth of the cylinder that is close to the licker-in roller. The cotton fibers are freely opened and sorted between the cylinder and the rear rotating cover plate before carding. The cotton fibers are freely transferred and sorted between the cylinder and the middle rotating cover plate. The cotton fibers are freely straightened after carding between the cylinder and the front rotating cover plate.

[0025] Cotton fibers are stripped from the doffer, which is close to the cylinder, and thus a cotton fiber web is formed on the doffer. The cotton fiber web is gathered into cotton fiber strips through the trumpet opening. After being pressed and sorted, the cotton fiber strips are obtained as raw cotton slivers. The raw cotton slivers are then wound into a cotton sliver can by a winding system.

[0026] Optionally, the first strip includes:

[0027] The raw cotton sliver obtained after carding is processed into a finished cotton sliver through two drawing processes.

[0028] In the first drawing process, multiple cotton slivers are fed together, and the first process configuration is used during drafting to straighten the forward hooks of the fibers in the cotton sliver. In the second drawing process, multiple cotton slivers are fed together, and the second process configuration is used during drafting to straighten the backward hooks of the fibers in the cotton sliver. In the third drawing process, multiple cotton slivers are fed together, and the third process configuration is used during drafting to ensure uniform weight distribution in the cotton sliver during the drawing process.

[0029] Optionally, the first roving comprises:

[0030] The cotton sliver is stretched under the stretching action of the rear stretching zone composed of rollers, and then drawn as a whole into a cotton sliver with the required linear density under the stretching action of the front stretching zone composed of aprons.

[0031] The cotton sliver is twisted into cotton roving by the spindle blade;

[0032] In this process, the cotton roving is continuously wound around the bobbin, which rotates in the same direction as the spindle. The linear velocity of the bobbin is greater than that of the spindle, and the difference in linear velocity between the two provides the power for the winding of the cotton roving.

[0033] Optionally, during the first spinning process, the friction between the traveler and the ring rail causes the linear speed of the traveler to be less than that of the bobbin. The difference in linear speed between the traveler and the bobbin provides winding power for the cotton core yarn. Furthermore, using heavier travelers reduces the traveler's rotation speed, thereby reducing the twist and enhancing the winding effect. This achieves high-speed spinning with multiple windings and less twist.

[0034] Optionally, the combing includes:

[0035] The raw cotton sliver obtained from pure cotton fibers after cleaning and carding is then subjected to combing preparation and combing in sequence to obtain the finished cotton sliver.

[0036] The combing preparation includes two pre-drawing stages and one sliver drawing stage. In the first pre-drawing stage, multiple cotton slivers are fed in together, and the forward hooks in the fed cotton slivers are straightened through the drafting system to obtain the preliminary cotton pre-drawing.

[0037] In the second pre-drawing process, multiple preliminary cotton pre-drawing slivers are fed in together, and the back hooks in the fed preliminary cotton pre-drawing slivers are straightened through the drafting system, thereby obtaining cotton pre-drawing slivers.

[0038] In the sliver lap process, multiple groups of cotton pre-slivers are fed together, and each group of cotton pre-slivers includes multiple pre-slivers. After drafting, each group of cotton pre-slivers is combined into a sub-cotton lap. Several sub-cotton laps are pressed together from top to bottom and then drafted before being output to obtain a combed cotton lap.

[0039] Optionally, the second yarn comprises:

[0040] The combed cotton roving is passively unwound and then fed into the drafting system. The fed combed cotton roving is stretched under the drafting action of the back drafting zone composed of rollers, and at the same time, the cotton fibers slide along the length of the roving.

[0041] During the slippage of cotton fibers, the cotton fibers undergo reverse twisting due to the twist of the roving, resulting in a detwisting effect. During the detwisting process, the twist spreads evenly along the length of the roving, resulting in a sliver.

[0042] Under the stretching action of the front stretching zone composed of leather aprons, and under the control of the internal friction field generated by the twist in the back sliver and the external friction field, the cotton fibers of the required linear density are extracted at the front nip attachment, and the twist of the cotton fibers is completely removed during the extraction process, thereby obtaining the cotton sliver of the required linear density.

[0043] Optionally, after obtaining cotton slivers of the desired linear density, the process further includes:

[0044] The cotton core yarn is pressed and output immediately by the front roller after being actively untwisted. The unwinding linear speed of the cotton core yarn is consistent with the rotational linear speed of the front roller of the spinning machine. The actively unwound cotton core yarn is combined with the cotton sliver output by the drafting system at the front roller and output at the same time.

[0045] During the output process, the cotton core yarn is released from the pressing action, which completely removes the winding power of the cotton core yarn. During the release process, the cotton core yarn continues to be twisted in the S-twist direction.

[0046] During the S-twist process, the cotton fibers in the core yarn and the cotton fibers in the cotton sliver intertwine to form a core-wrapped sliver.

[0047] Optionally, after obtaining the core-spun filament, the process further includes:

[0048] The core-spun sliver output from the drafting system interacts with the S-twist applied to the cotton core yarn under the Z-twist action transmitted from bottom to top, so that the cotton fibers in the cotton sliver and the cotton fibers in the cotton core yarn are twisted together to obtain soft cotton yarn.

[0049] The friction between the traveler and the ring rail causes the linear speed of the traveler to be less than that of the bobbin. This difference in linear speed provides the winding power for the cotton yarn. By using travelers of appropriate weight and increasing the speed of the front roller while keeping the spindle speed constant, the Z-twist is reduced. The Z-twist is transmitted from bottom to top along the length of the cotton yarn. When it reaches the twisting point, it interacts with the S-twist applied to the core yarn, resulting in a balanced fixation between the cotton fibers in the sliver and the core yarn.

[0050] Optionally, during the Z-twist twisting process, the main shaft drives the spindle to rotate in the Z-twist direction, which in turn drives the yarn tube embedded in the spindle to rotate synchronously. The rotation of the yarn tube then drives the cotton yarn wound on it to rotate. The rotation of the cotton yarn then drives the passing steel wire traveler to rotate around the steel ring track. The rotation of the steel wire traveler causes the cotton yarn to rotate along the axial direction, thereby generating a Z-twist twist on the cotton yarn. The generated Z-twist twist is transmitted from bottom to top along the length of the cotton yarn.

[0051] Optionally, the preparation method further includes:

[0052] Fine cotton fibers are selected for blending, with length as the main factor. The difference in grade of the selected raw cotton should not exceed 1, and the difference in impurity content should not exceed 0.5%.

[0053] In some embodiments, the cotton yarn is woven from the cotton yarn described in this application.

[0054] In some embodiments, the fabric is woven from the cotton yarn described in this application.

[0055] The cotton yarn, cotton thread, fabric, and preparation method thereof provided in this disclosure can achieve the following technical effects:

[0056] This application achieves high-speed spinning with multiple windings and less twist by processing pure cotton fibers through opening, cleaning, carding, first drawing, first roving, and first spinning to obtain S-twist cotton core yarn. In the first spinning process, a ring and traveler with high friction are used to achieve this. Simultaneously, combed cotton roving is obtained by sequentially processing pure cotton fibers through the cleaning and carding unit, combing, second drawing, and second roving. In the second spinning process, the cotton core yarn and combed cotton roving are core-wound and twisted together. Specifically, the cotton core yarn is actively unwound and immediately fed in by the front roller. The combed cotton roving, after drafting, merges with the cotton core yarn. During this merging process, the cotton core yarn continues to twist in the S-twist direction under the unwound winding force, thus intertwining with the sliver output from the drafting system during twisting. This achieves low twist in the spinning stage and reduces the designed twist in the spinning process. Meanwhile, Z-twist is applied in the second yarn, so that the applied Z-twist interacts with the S-twist applied to the cotton core yarn. Under the interaction of the two, the cotton fibers in the sliver and the cotton fibers in the core yarn are fixed in a balanced state. This reduces the anti-twist of the fibers in the yarn while increasing the strength of the cotton yarn and achieving the softness of the yarn.

[0057] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0058] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0059] Figure 1 This is a schematic flowchart of a method for preparing cotton yarn provided in an embodiment of this disclosure;

[0060] Figure 2 This is a schematic diagram of a carding process provided in an embodiment of this disclosure;

[0061] Figure 3 This is a schematic diagram of the process of a second yarn according to an embodiment of the present disclosure. Detailed Implementation

[0062] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0063] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0064] Unless otherwise stated, the term "multiple" means two or more.

[0065] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0066] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0067] The term "correspondence" can refer to an association or binding relationship. The correspondence between A and B means that there is an association or binding relationship between A and B.

[0068] Combination Figure 1 As shown, this disclosure provides a method for preparing soft cotton yarn. This method involves core-wrapping and plying a multi-wound, low-twist (S-twist) cotton core yarn with a Z-twist combed cotton roving, thereby reducing the design twist during spinning, decreasing the reverse twist of the fibers in the yarn, and achieving yarn softness while maintaining yarn strength. The method includes:

[0069] Step 101: Pure cotton fibers are sequentially processed through opening and cleaning, carding, first drawing, first roving, and first spinning to obtain S-twist cotton core yarn. During the first spinning process, a ring and traveler with high friction are used to make the winding speed of the cotton core yarn reach more than 1.5% of the spindle speed, thereby achieving high-speed spinning with multiple windings and less twisting.

[0070] Step 102: Pure cotton fibers are sequentially processed through a cleaning and combing unit, combing, second drawing, and second roving to obtain combed cotton roving.

[0071] Step 103: The S-twist cotton core yarn and combed cotton roving are spun together in the second spinning process to obtain the desired soft cotton yarn. During the second spinning process, the cotton slivers obtained after the cotton core yarn and combed cotton roving are core-wound and twisted together, so that the cotton core yarn continues to be twisted in the S-twist direction under the action of the unwinding winding force. In the second spinning process, a Z-twist direction is applied that interacts with the S-twist direction of the cotton core yarn, so that the applied Z-twist direction interacts with the S-twist direction that continues to be applied to the cotton core yarn.

[0072] In the second spinning process, the winding speed of the cotton yarn is reduced to less than 1% of the spindle speed by using a ring and traveler.

[0073] The method for preparing soft cotton yarn provided in this disclosure involves processing pure cotton fibers through opening and cleaning, carding, first drawing, first roving, and first spinning to obtain S-twist cotton core yarn. In the first spinning process, a ring and traveler with high friction are used to achieve high-speed spinning with multiple windings and less twist. Simultaneously, pure cotton fibers are processed sequentially through a cleaning and carding unit, combing, second drawing, and second roving to obtain combed cotton roving. In the second spinning process, the core yarn and combed cotton roving are core-wound and twisted together. Specifically, the core yarn is actively unwound and immediately fed in by the front roller. The combed cotton roving, after drafting, merges with the core yarn. During this merging process, the core yarn continues to twist in the S-twist direction under the unwound winding force, thus intertwining with the sliver output from the drafting system during twisting. This achieves low twist in the spinning stage and reduces the designed twist in the spinning process. Meanwhile, Z-twist is applied in the second yarn, so that the applied Z-twist interacts with the S-twist applied to the cotton core yarn. Under the interaction of the two, the cotton fibers in the sliver and the cotton fibers in the core yarn are fixed in a balanced state, thereby reducing the anti-twist of the fibers in the yarn and improving the strength of the cotton yarn.

[0074] In the embodiments of this application, when processing cotton core yarn, fine cotton fibers should be selected for blending. Blending should be based primarily on length, with strict control over the differences in the selected raw cotton. The grade difference should not exceed 1, and the impurity difference should not exceed 0.5%, achieving a comprehensive approach that balances overall considerations, ensures key aspects are addressed, and prioritizes quality. For example, high-grade, fine, and long raw cotton can be selected and blended using eight cotton bales, each with a blending ratio of 12.5%.

[0075] In the embodiments of this application, cotton core yarn is produced by sequentially processing selected cotton fibers through a disc cotton grabber, cotton blending and opening, vibrating feeding, a cotton cleaning and lap forming machine equipped with an intelligent opening and opening frequency conversion self-adjusting leveling device, carding, three drawing processes, a first roving, and a first spinning process. In the disc cotton grabber process, a single-hand serrated blade is used, with the blades divided into three groups from sparse to dense from the inside out, making the grabbed fiber bundles smaller and more uniform, which is beneficial for subsequent mixing and impurity removal processes. In the cotton blending and opening process, the small pieces of cotton grabbed by the cotton grabber are fed into the condenser for mixing, opening, and removal of some dust and impurities. Then, the cotton is sucked away by the condenser on the front machine. A cotton outlet is located above the porcupine beater; the input small pieces of cotton pass through the corner nail curtain, the flat beater, and then are output to the next machine via the porcupine beater.

[0076] Optionally, the opening and cleaning process of this application includes pre-rolling treatment and cotton cleaning and rolling. The pre-rolling treatment includes disc cotton grabbing, cotton mixing and opening, and vibration feeding, while cotton cleaning and rolling includes feeding, loosening, and rolling.

[0077] Specifically, the lap-forming equipment used in cotton cleaning and lap forming includes a feeding section, an opening section, and a lap-forming section. The feeding section includes an upper feeding roller and a lower feeding roller. The upper feeding roller includes a feeding roller shaft, which is a solid cylindrical structure. Feeding roller sleeves are provided on the feeding roller shaft. The feeding roller sleeves include a left feeding roller sleeve, a middle feeding roller sleeve, and a right feeding roller sleeve. The left feeding roller sleeve, the middle feeding roller sleeve, and the right feeding roller sleeve are all made of hard rubber and are close to each other. The left feeding roller sleeve, the middle feeding roller sleeve, and the right feeding roller sleeve are connected to the feeding roller shaft through bearings, so that the connected left feeding roller sleeve, the middle feeding roller sleeve, and the right feeding roller sleeve can rotate freely.

[0078] The lower feed roller includes a feed roller shaft, which is a solid steel cylindrical structure. Feed roller sleeves are mounted on the feed roller shaft, including a left feed roller sleeve, a middle feed roller sleeve, and a right feed roller sleeve. These three sleeves are made of the same material as the feed roller shaft and are tightly fitted together. They are connected to the feed roller shaft via bearings, allowing each sleeve to rotate freely. The left, middle, and right feed roller sleeves are driven by a left motor, a middle motor, and a right motor, respectively, via a left drive belt, a middle drive belt, and a right drive belt.

[0079] A certain number of pressure sensors are equally spaced along the length of the left, middle, and right feed roller sleeves. The number of pressure sensors is between 3 and 8. The left motor, middle motor, right motor, and each pressure sensor are connected to a programmable logic controller.

[0080] A loosening section is provided at the front of the feeding section. The loosening section adopts a comprehensive beater, which includes 3 to 6 beater arms. Each beater arm includes a rectangular blade, a serrated blade, and a comb-needle blade.

[0081] A winding section is located at the front of the opening section. The winding section includes a cotton suction winding device, a cotton roll gradual pressure mechanism, and an anti-sticking concave-convex roller. In use, the cotton fiber bundles produced by vibration are continuously fed into the feeding section. During this process, the left, middle, and right feeding roller sleeves of the upper feeding roller are pressed tightly against the left, middle, and right feeding roller sleeves of the lower feeding roller, respectively, thereby pressing the corresponding cotton fiber bundles.

[0082] During the pressing process, pressure sensors at corresponding positions detect the reaction pressure of the pressed cotton fiber bundle in real time, thus characterizing the thickness of the fed cotton fiber bundle based on the detected pressure value. At this time, the pressure values ​​from each pressure sensor on the left feed roller sleeve are averaged to obtain the average thickness characterization value of the cotton fiber bundle pressed by the left feed roller sleeve. The pressure values ​​from each pressure sensor on the middle feed roller sleeve are averaged to obtain the average thickness characterization value of the cotton fiber bundle pressed by the middle feed roller sleeve. The pressure values ​​from each pressure sensor on the right feed roller sleeve are averaged to obtain the average thickness characterization value of the cotton fiber bundle pressed by the right feed roller sleeve.

[0083] When the average thickness value exceeds the required standard value and is outside the required control range, the left, middle, or right motor drives the left, middle, or right feed roller sleeve to rotate at a reduced speed relative to the standard rotation speed, thereby slowing down the feeding of excessively thick cotton fiber bundles at the corresponding position. When the average thickness value is less than the required standard value and is outside the required control range, the left, middle, or right motor drives the left, middle, or right feed roller sleeve to rotate at a reduced speed relative to the standard rotation speed, thereby accelerating the feeding of excessively thin cotton fiber bundles at the corresponding position. When the difference between the average thickness value and the required standard value is within the required control range, the left, middle, or right motor drives the left, middle, or right feed roller sleeve to rotate at the standard rotation speed, thereby ensuring normal feeding of cotton fiber bundles at the corresponding position.

[0084] The cotton fibers in the fed cotton fiber bundle are held at one end, and the other end is successively beaten and loosened by the rectangular blade, serrated blade and comb blade of the comprehensive beater to produce a cotton fiber flow. After the cotton fiber flow passes through the cotton suction and roll forming device, it is condensed into a roll, and then it is compressed by the cotton roll gradually increasing pressure mechanism. After being treated by the anti-sticking concave and convex roller, it is wound on the winding roller.

[0085] Optionally, combined Figure 2 As shown, the carding process of this application includes:

[0086] Step 201: The obtained cotton fiber roll is fed into the feed plate and feed roller, so that the cotton fibers in the cotton fiber roll are completely transferred to the licker-in roller.

[0087] Step 202: Cotton fibers are stripped by the needle cloth of the cylinder that is close to the licker-in roller. The cotton fibers are subjected to free opening and sorting before carding between the cylinder and the rear rotating cover plate. The cotton fibers are subjected to free transfer and carding between the cylinder and the middle rotating cover plate. The cotton fibers are subjected to free straightening and sorting after carding between the cylinder and the front rotating cover plate.

[0088] Step 203: Cotton fibers are stripped from the doffer, which is close to the cylinder, and thus a cotton fiber web is formed on the doffer. The cotton fiber web is gathered into cotton fiber strips through the trumpet opening. The cotton fiber strips are pressed and sorted to obtain cotton slivers. The cotton slivers are then wound into a cotton sliver can by a winding system.

[0089] Specifically, in carding, this application feeds the prepared cotton fiber roll into the cotton wick by holding it through a feed plate and a feed roller. During the feeding process, the cotton fibers in the cotton fiber roll are held at one end while the other end is loosened by the needle cloth on the high-speed rotating licker-in roller and gradually transferred completely to the licker-in roller during the initial impact.

[0090] The transferred cotton fibers are then completely stripped by the carding cloth of the large-diameter, low-speed cylinder, which is in close contact with the licker-in roller, thus achieving complete stripping and transfer of the cotton fibers from the licker-in roller to the cylinder. The cotton fibers transferred to the cylinder are then carried between the cylinder and the rear rotating flats, where they undergo a pre-carding free-opening process. Under this process, the cotton fibers are further loosened in a free state. They are then carried between the cylinder and the middle rotating flats, where they undergo a free-transfer carding process. Under this carding process, the bonding force between the cotton fibers is significantly weakened, resulting in the cotton fibers existing in a single-fiber state.

[0091] The cotton fibers are then guided between the cylinder and the front rotating cover plate, where they undergo a combing and straightening process. This straightening process straightens the fibers, ensuring that the beginning and end face are aligned. The combed cotton fibers are then carried out by the large-diameter cylinder, where they are completely stripped by the card clothing of the small-diameter, high-speed doffer, which is located close to the cylinder. This strip is then coalesced on the doffer to form a cotton fiber web. The cotton fiber web is then gathered into cotton fiber slivers through the bell mouth. After being pressed and straightened, the cotton fiber slivers are obtained as raw cotton slivers. These raw cotton slivers are then continuously wound into a cotton sliver can by the winding system.

[0092] Optionally, the first drawing process of this application includes drawing a cotton sliver obtained after carding through two drawing processes to obtain a finished cotton sliver.

[0093] In the first drawing process, multiple cotton slivers are fed together, and the first process configuration is used during drafting to straighten the forward hooks of the fibers in the cotton sliver. In the second drawing process, multiple cotton slivers are fed together, and the second process configuration is used during drafting to straighten the backward hooks of the fibers in the cotton sliver. In the third drawing process, multiple cotton slivers are fed together, and the third process configuration is used during drafting to ensure uniform weight distribution in the cotton sliver during the drawing process.

[0094] Specifically, the cotton sliver of this application is processed into a finished sliver with improved fiber straightness and reduced weight unevenness through two drawing processes. In the first drawing process, 3 to 5 cotton slivers are fed together, and a large spacing, large back zone drafting, and small front zone drafting process are used during the drafting process, which mainly straightens the forward hooks of the fibers in the cotton sliver. In the second drawing process, 3 to 5 cotton slivers are fed together, and a large spacing, small back zone drafting, and large front zone drafting process are used during the drafting process, which mainly straightens the backward hooks of the fibers in the cotton sliver. In the third drawing process, 6 to 8 cotton slivers are fed together, and a small spacing, small back zone drafting, and small front zone drafting process are used during the drafting process, which mainly reduces the weight unevenness of the cotton sliver during the thorough drawing process.

[0095] Optionally, the first roving of this application includes tensioning the cotton sliver under the drafting action of the rear drafting zone composed of rollers, and drawing it as a whole into a cotton sliver of the desired linear density under the drafting action of the front drafting zone composed of aprons. The cotton sliver is then twisted into cotton roving by being driven by a spindle.

[0096] Specifically, the cotton sliver of this application is used to produce a strong cotton roving through a first roving process. During the first roving process, the cotton sliver is tensioned under the small drafting action of the back drafting zone composed of simple rollers. Under the large drafting action of the front drafting zone composed of aprons, the fibers of the desired linear density are extracted as a whole, thus obtaining a cotton sliver of the desired linear density. The cotton sliver is then twisted into cotton roving by a high-speed rotating spindle. The cotton roving is continuously wound around a bobbin that rotates in the same direction as the spindle, and the linear velocity of the bobbin is greater than that of the spindle. The difference in linear velocity between the two provides the power for the winding of the cotton roving.

[0097] Optionally, the cotton roving of this application is used to produce a high-strength cotton core yarn through a first spinning process. During the first spinning process, the cotton roving is tensioned under the small drafting action of the back drafting zone composed of simple rollers, achieving uniform twist propagation along the length of the roving. Under the large drafting action of the front drafting zone composed of aprons, and controlled by the internal friction field generated by the twist within the cotton roving, the cotton fibers of the desired linear density are extracted as a whole, thereby obtaining a cotton sliver of the desired linear density. The cotton sliver output from the drafting system is then twisted upwards in the S-twist direction to obtain the cotton core yarn.

[0098] During the twisting process, the main shaft drives the spindle to rotate in an S-twist direction, which in turn drives the yarn tube embedded in the spindle to rotate synchronously. The rotation of the yarn tube then drives the cotton core yarn wound on it to rotate, and the rotation of the cotton core yarn in turn drives the traveling wires passing through it to rotate around the ring rail. The rotation of the traveling wires causes the cotton core yarn to rotate along the axial direction, thus generating an S-twist twist on the cotton core yarn. Due to the friction between the traveling wires and the ring rail, the linear speed of the traveling wires is less than that of the yarn tube. The difference in the linear speed of the traveling wires and the yarn tube provides the winding power for the cotton core yarn. In addition, heavier traveling wires are used in the process, which reduces the rotational speed of the traveling wires, thereby reducing the directly generated twist and enhancing the winding effect, thus achieving high-speed spinning with more winding and less twist.

[0099] In the embodiments of this application, the prepared pure cotton fiber is used, and the pure cotton fiber is sequentially processed through a cleaning and combing unit, combing, second drawing, and second roving to obtain combed cotton roving.

[0100] Optionally, the cleaning and carding process of this application includes sequentially passing pure cotton fibers through reciprocating cotton grasping, heavy object separation, single-axis flow opening, multi-compartment blending, fine opening, foreign fiber removal and carding to obtain cotton sliver.

[0101] Specifically, in the reciprocating cotton grabbing process, 24 selected cotton bales are arranged on both sides of the cotton grabbing machine. These 24 cotton bales consist of 8 cotton bales from 3 sets of the first-stage cotton distribution. The cotton fibers inside the distributed cotton bales are grabbed along their length by the grabbing beaters and then transported to the heavy-duty separator via the cotton conveying pipeline. Subsequently, iron impurities are removed by magnets, and large impurities are separated and removed under centrifugal force through the curved pipe structure during high-speed turning.

[0102] The cotton fiber flow is then transported to the single-axis flow cotton opener through the cotton conveying pipeline. The cotton fibers are fed in a free state and are hit by the elastic angle nail beaters on the opening roller. Under the elastic impact, the cotton fibers are loosened, and the impurities that are gradually exposed fall down between the dust bars under the action of large centrifugal force.

[0103] The cotton fiber stream is then transported to the multi-compartment blender via the cotton conveying pipeline. The fed cotton fiber stream is evenly blown into each cotton compartment under the action of airflow, forming airflow mixing. The fiber layers in each compartment are conveyed through a 90-degree turn, and are mixed again by utilizing their path difference. Excess fibers are thrown into the blending chamber to achieve fine mixing. The cotton fiber stream is then transported to the fine opening machine via the cotton conveying pipeline.

[0104] In the fine opening process, the cotton fibers flow through the opening needle cloth on the first opening roller and enter between the first opening roller and the second opening roller. Between the two rollers, the cotton fibers are simultaneously gripped by the opening needle cloth on the first opening roller and the opening needle cloth on the second opening roller, thereby loosening the cotton fibers and transferring some of the cotton fibers to the second opening roller.

[0105] A first stripping roller is provided on the first opening roller. Untransferred cotton fibers are stripped by the first stripping roller and fall onto the second opening roller. Then, driven by the second opening roller, they enter between the second and third opening rollers. Between the two rollers, they are simultaneously gripped by the opening needle cloth on the second and third opening rollers, thereby loosening the cotton fibers and transferring some of them to the third opening roller.

[0106] A second cotton stripping roller is installed on the second opening roller. The cotton fibers that have not been transferred are stripped by the second cotton stripping roller and fall onto the third opening roller. The cotton fiber flow is then transported to the foreign fiber removal machine through the cotton conveying pipeline. The cotton fiber flow is gradually thinned by the rollers until it is arranged in a single layer.

[0107] Images are captured by image-capturing devices arranged at equal intervals along the width of the fiber layer. These images are then processed by an image processing system and compared with foreign fiber samples stored in a database. When foreign fibers are detected, nozzles at the corresponding locations open to blow the fibers down, thereby separating and removing the foreign fibers.

[0108] The cotton fiber stream is then transported to the finishing box via the cotton conveying pipeline. Inside the finishing box, the height is controlled by a photoelectric tube before being output. During the output process, the cotton fiber stream at the bottom of the finishing box is gathered along the width of the finishing box by a pair of large-diameter wooden rollers under pressure, and then pressed out by a pair of small-diameter wooden rollers. The pressed cotton fiber bundle is then fed into the carding machine between the fixed lower feed plate and the rotating upper feed roller.

[0109] In the carding machine, the cotton fibers are held and opened by the licker-in rollers, and then completely stripped by the cylinder adjacent to the licker-in rollers. The stripped cotton fibers are repeatedly transferred and combed in the carding area between the cylinder and the movable cover plate until the cotton fibers are separated into single fibers and completely carried out by the cylinder.

[0110] After being stripped by the doffer, the cotton fibers are condensed into a cotton fiber web. The cotton fiber web is then gathered into cotton fiber slivers through the bell mouth. After being pressed and sorted, the cotton fiber slivers are obtained as raw cotton slivers. The raw cotton slivers are continuously wound in the cotton sliver can by the winding system. The unstripped cotton fibers are then fed into the carding area for carding by the cylinder.

[0111] Optionally, the combing process of this application includes taking a cotton sliver obtained from pure cotton fibers after cleaning and combing, and then sequentially preparing and combing it to obtain a finished cotton sliver.

[0112] The combing preparation process includes two pre-drawing stages and one sliver lap stage. In the first pre-drawing stage, multiple cotton slivers are fed in together, and the forward hooks within the fed cotton slivers are straightened through a drafting system, resulting in a preliminary pre-drawing sliver. In the second pre-drawing stage, multiple preliminary pre-drawing slivers are fed in together, and the backward hooks within the fed preliminary pre-drawing slivers are straightened through a drafting system, resulting in a final pre-drawing sliver. In the sliver lap stage, multiple sets of pre-drawing slivers are fed in together, and each set of pre-drawing slivers includes multiple pre-drawing slivers. After drafting, each set of pre-drawing slivers is combined into a sub-roll. Several sub-rolls are pressed together from top to bottom, drafted again, and then output to obtain a combed cotton lap.

[0113] Combing involves feeding a cotton combing lap into a combing machine via a clamping plate, where the cotton fibers within the lap are held at one end while the other end is combed by the carding cloth on the cylinder. The straightened cotton fibers are then gripped by a separating roller, during which one end of the cotton fiber is held by the separating roller while the other end is combed by the top comb, and simultaneously, shorter, unheld cotton fibers are combed and slipped onto the cylinder and carried out.

[0114] Specifically, in the first pre-drawing stage of this application, eight cotton slivers are fed in together, and the drafting system employs a large spacing, a large back zone drafting, and a small front zone drafting. This primarily straightens the front hooks within the fed cotton slivers, resulting in a preliminary cotton pre-drawing sliver. In the second pre-drawing stage, eight preliminary cotton pre-drawing slivers are fed in together, and the drafting system employs a large spacing, a small back zone drafting, and a large front zone drafting. This primarily straightens the back hooks within the fed preliminary cotton pre-drawing slivers, resulting in a cotton pre-drawing sliver. In the sliver lap stage, three groups of cotton pre-drawing slivers are fed in together, with each group comprising 24-28 pre-drawing slivers. Each group of pre-drawing slivers is drafted up to 1.2 times and then combined into a sub-roll. The three sub-rolls are pressed together and then drafted up to 1.1 times before being output to obtain a combed cotton lap.

[0115] This application further involves feeding a cotton combed lap into a combing machine. During the combing process, the cotton combed lap is gripped and fed in by a clamping plate. The cotton fibers within the lap are held at one end while the other end is combed by the carding cloth on the cylinder, thus straightening the hooks at the front of the cotton fibers. The straightened cotton fibers are then gripped by the separating rollers. During this gripping process, one end of the cotton fiber is held by the separating rollers while the other end is combed by the top comb, thus straightening the hooks at the rear of the cotton fiber. Simultaneously, shorter, ungripped cotton fibers are combed and slipped onto the cylinder and carried out. After two drawing passes, the combed sliver is processed into a cotton sliver with reduced weight unevenness and further straightened fiber hooks. This sliver is then used to produce a cotton roving with a certain strength.

[0116] Optionally, combined Figure 3 As shown, the second yarn of this application includes:

[0117] Step 301: The combed cotton roving is passively unwound and fed into the drafting system, so that the fed combed cotton roving is stretched under the drafting action of the back drafting zone composed of rollers, and at the same time, the cotton fibers slide along the length direction of the roving.

[0118] Step 302: During the slippage of cotton fibers, the cotton fibers undergo reverse twisting due to the twist of the roving, resulting in a detwisting effect. During the detwisting process, the twist spreads evenly along the length of the roving, resulting in a sliver.

[0119] Step 303: Under the stretching action of the front stretching zone composed of the leather apron, and under the control of the internal friction field generated by the twist in the back sliver and the external friction field, the cotton fibers of the required linear density are extracted at the front nip attachment, and the twist of the cotton fibers is completely removed during the extraction process, thereby obtaining the cotton sliver of the required linear density.

[0120] Step 304: The cotton core yarn is immediately pressed and output by the front roller after being actively untwisted. The unwinding speed of the cotton core yarn is consistent with the rotational speed of the front roller of the spinning machine. The actively unwound cotton core yarn is combined with the cotton sliver output by the drafting system at the front roller and output at the same time.

[0121] During output, the cotton core yarn is released from the pressing action, causing the winding force of the cotton core yarn to completely dissipate. During this dissipation process, the cotton core yarn continues to twist in the S-twist direction.

[0122] Step 305: During the S-twist process, the cotton fibers in the cotton core yarn and the cotton fibers in the cotton sliver intertwine to obtain the core-spun sliver.

[0123] Step 306: The core-spun sliver output from the drafting system interacts with the S-twist applied to the cotton core yarn under the Z-twist action transmitted from bottom to top, so that the cotton fibers in the cotton sliver and the cotton fibers in the cotton core yarn are twisted together to obtain soft cotton yarn.

[0124] The friction between the traveler and the ring rail causes the linear speed of the traveler to be less than that of the bobbin. This difference in linear speed provides the winding power for the cotton yarn. By using travelers of appropriate weight and increasing the speed of the front roller while keeping the spindle speed constant, the Z-twist is reduced. The Z-twist is transmitted from bottom to top along the length of the cotton yarn. When it reaches the twisting point, it interacts with the S-twist applied to the core yarn, resulting in a balanced fixation between the cotton fibers in the sliver and the core yarn.

[0125] Specifically, this application involves processing combed cotton roving and the resulting cotton core yarn together through a second spinning process to produce the desired soft cotton yarn. The second spinning process employs a core-spun production technique. The cotton roving is passively unwound and fed into the drafting system. The fed roving is tensioned under the relatively small drafting action of the back drafting zone composed of simple rollers, while simultaneously achieving a small slippage between cotton fibers along the length of the roving. During this slippage, the cotton fibers undergo a counter-twist due to the roving twist, resulting in a small untwisting effect. This untwisting process ensures the uniform propagation of twist along the length of the roving, thus producing the sliver.

[0126] Under the large stretching action of the front stretching zone composed of the leather apron, and under the combined control of the internal friction field generated by the twist in the back sliver and the external friction field generated by the friction force of the leather apron on the opposite fiber, the cotton fibers of the required linear density are gradually extracted in the front nip attachment, and the twist is completely removed during the extraction process, thereby obtaining the cotton sliver of the required linear density.

[0127] After being actively untwisted, the cotton core yarn is immediately pressed and output by the front roller. During this process, the yarn tube wrapped with the cotton core yarn is suspended on the unwinding rod. The unwinding rods of each spindle are connected by the unwinding belt and driven by the unwinding motor, so that the unwinding linear speed of the cotton core yarn is consistent with the rotation linear speed of the front roller of the spinning machine.

[0128] After being actively unwound, the cotton core yarn merges with the cotton sliver output from the drafting system at the front roller, and both are output simultaneously. During output, the cotton core yarn is released from the pressing action, thus completely releasing its winding power. This unwinding process allows the cotton core yarn to continue S-twist twisting. During this S-twist twisting, the cotton fibers within the cotton core yarn intertwine with the cotton fibers in the cotton sliver to form a core-spun sliver, thereby generating twist in the spinning section and reducing the designed twist in the fine yarn processing.

[0129] The core-spun sliver output by the drafting system is twisted upwards in the Z-direction to produce cotton yarn. During the twisting process, the main shaft drives the spindle to rotate in the Z-direction, which in turn drives the yarn tube embedded in the spindle to rotate synchronously. The rotation of the yarn tube then drives the cotton yarn wound on it to rotate. The rotation of the cotton yarn then drives the passing steel traveler to rotate around the ring rail. The rotation of the steel traveler causes the cotton yarn to rotate axially, thus generating a Z-direction twist in the cotton yarn.

[0130] Due to the friction between the traveler and the ring rail, the linear speed of the traveler's rotation is less than that of the yarn bobbin. The difference in the linear speed of the traveler and the yarn bobbin provides the winding power for the cotton yarn. In addition, when using travelers of appropriate weight, and while keeping the spindle speed constant, the speed of the front roller is increased, thereby increasing the direct twist in the Z-twist direction.

[0131] The resulting Z-twist twist is transmitted from bottom to top along the length of the cotton yarn. When it reaches the twisting point, it interacts with the S-twist that is continuously applied to the core yarn. Under the interaction of the two, the cotton fibers in the cotton sliver and the cotton fibers in the core yarn are fixed in a balanced state, thereby reducing the anti-twist property of the fibers in the cotton yarn.

[0132] This application achieves high-speed spinning with multiple windings and less twisting by processing selected pure cotton fibers through opening, cleaning, carding, drawing, first roving, and first spinning. In the spinning process, steel rings and travelers with high friction between them are used to achieve high-speed spinning. The same pure cotton fibers are sequentially processed through a combing and carding unit, combing, drawing, and a second roving to produce combed cotton roving. The second roving uses a core-spun process, where the cotton core yarn is actively unwound and immediately fed in by the front roller. After drafting, the combed cotton roving merges with the cotton core yarn. During the merging process, the cotton core yarn continues to twist in the S-twist direction under the action of the unwound winding force, thus intertwining with the sliver output from the drafting system during the twisting process, thereby increasing the twist of the spinning segment and reducing the designed twist in the spinning process, thus achieving the softness of the yarn. At the same time, the roving uses Z-twist, so that the applied Z-twist interacts with the S-twist that continues to be applied to the cotton core yarn, thereby reducing the anti-twist property of the fibers in the finished yarn while increasing the strength of the soft cotton yarn, thus achieving the softness of the yarn.

[0133] Meanwhile, this disclosure provides a soft cotton yarn woven from the soft cotton yarn of this application.

[0134] Furthermore, this disclosure provides a fabric woven from the cotton yarn of this application.

[0135] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0136] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0137] The methods and products (including but not limited to devices and equipment) disclosed in the embodiments herein can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units may be merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed units may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. Furthermore, the functional units in the embodiments of this disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0138] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A process for the production of a soft cotton yarn, characterized in that, The application relates to a cotton soft yarn production method. The pure cotton fibers are sequentially subjected to opening and cleaning, carding, first doubling, first roving and first spinning to obtain a cotton core yarn with an S twist, wherein, during the first spinning process, a steel ring and a steel wire ring with large friction force are adopted to make the winding linear speed of the cotton core yarn reach more than 1.5% of the spindle linear speed, so that multi-winding and less twisting spinning under high-speed spinning is realized. The pure cotton fibers are sequentially subjected to opening and cleaning, carding, second doubling and second roving to obtain a carded cotton roving. The S-twist cotton core yarn and the carded cotton roving are jointly subjected to second spinning to obtain the required cotton soft yarn, wherein, during the second spinning process, the cotton core yarn and the cotton sliver obtained after drafting are subjected to core-spun plying, the cotton core yarn continues to be twisted in the S-twist under the action of the removed winding force, and, in the second spinning, Z-twist twisting which interacts with the S-twist of the cotton core yarn is applied, so that the applied Z-twist interacts with the continuously applied S-twist of the cotton core yarn. In the application, the winding linear speed of the cotton soft yarn is made to reach below 1% of the spindle linear speed by the steel ring and the steel wire ring, specifically, the rotating linear speed of the steel wire ring is made to be less than the rotating linear speed of the tube by the friction force between the steel wire ring and the steel ring track, the difference between the rotating linear speeds of the steel wire ring and the tube provides the winding power for the cotton soft yarn, and, during use, the steel wire ring with moderate weight is selected, and the rotating speed of the front roller is increased under the condition that the rotating speed of the spindle is kept constant, so that the generated Z-twist twisting degree is reduced, the generated Z-twist twisting degree is transmitted from the bottom to the top along the length direction of the cotton soft yarn, and the transmission reaches the twisting point, so that the cotton fibers in the cotton sliver and the cotton fibers in the cotton core yarn are fixed in a balanced state. The cotton core yarn is immediately pressed and output by the front roller after being actively unwound, the unwinding linear speed of the cotton core yarn is consistent with the rotating linear speed of the front roller of the spinning machine, the cotton core yarn after being actively unwound is combined with the cotton sliver output by the drafting system at the front roller and is simultaneously output. During the output, the winding power of the cotton core yarn is completely removed because the cotton core yarn is separated from the pressing action, so that the cotton core yarn continues to be twisted in the S-twist. During the S-twist twisting process, the cotton fibers in the cotton core yarn and the cotton fibers in the cotton sliver are interlaced to obtain a core-spun sliver.

2. The production method according to claim 1, characterized by, The opening and cleaning includes: pre-treatment before winding and cotton cleaning and winding; the pre-treatment before winding includes disc cotton grabbing, mixed opening and vibration feeding, and the cotton cleaning and winding includes feeding, opening and winding.

3. The preparation method according to claim 2, characterized in that, The winding equipment used in the cotton cleaning and winding includes a feeding part, an opening part and a winding part, the opening part is arranged at the front of the feeding part, and the winding part is arranged at the front of the opening part.

4. The production method according to claim 3, characterized by, The feeding part includes: The upper feeding roller comprises a cylindrical feeding roller shaft, a left feeding roller sleeve, a middle feeding roller sleeve and a right feeding roller sleeve are arranged on the feeding roller shaft, the left feeding roller sleeve, the middle feeding roller sleeve and the right feeding roller sleeve are in close contact with each other, and the left feeding roller sleeve, the middle feeding roller sleeve and the right feeding roller sleeve are connected with the feeding roller shaft through bearings respectively, so that the left feeding roller sleeve, the middle feeding roller sleeve and the right feeding roller sleeve can rotate freely after being connected. The lower feeding roller comprises a cylindrical feeding roller shaft, a left feeding roller sleeve, a middle feeding roller sleeve and a right feeding roller sleeve are arranged on the feeding roller shaft, the left feeding roller sleeve, the middle feeding roller sleeve and the right feeding roller sleeve are in close contact with each other, and the left feeding roller sleeve, the middle feeding roller sleeve and the right feeding roller sleeve are connected with the feeding roller shaft through bearings respectively, so that the left feeding roller sleeve, the middle feeding roller sleeve and the right feeding roller sleeve can rotate freely after being connected. The pressure sensor is arranged at equal intervals along the length direction of the left feeding roller sleeve, the middle feeding roller sleeve and the right feeding roller sleeve, and the left motor, the middle motor, the right motor and each pressure sensor are in communication connection with the programmable logic controller.

5. The preparation method according to claim 3, characterized in that, The comprehensive beater comprises a plurality of beater arms, each beater arm comprises a rectangular blade, a sawtooth blade and a card needle blade.

6. The method of claim 1, wherein, The carding machine comprises: The prepared cotton fiber roll is fed by the feeding plate and the feeding roller, and the cotton fibers in the cotton fiber roll are completely transferred to the taker-in; The cotton fibers are stripped by the card clothing of the cylinder in close contact with the taker-in, and the cotton fibers are freely opened and arranged between the cylinder and the rear rotating flat, the cotton fibers are freely transferred and carded between the cylinder and the middle rotating flat, and the cotton fibers are freely straightened and arranged between the cylinder and the front rotating flat; The cotton fibers are stripped by the card clothing of the doffer in close contact with the cylinder, so that the cotton fiber web is condensed on the doffer, the cotton fiber web is gathered into a cotton fiber strip through the trumpet, the cotton fiber strip is pressed and arranged to obtain the cotton sliver, and the cotton sliver is wound in the sliver can through the winding system.

7. The production method according to claim 6, characterized by, The first drawing frame comprises: The cotton sliver obtained after the carding machine is drawn into a cotton sliver through two drawing frames; In the first drawing frame, a plurality of cotton slivers are fed together, and the front hook of the fiber in the cotton sliver is straightened by using the first process configuration in the drawing process; in the second drawing frame, a plurality of cotton slivers are fed together, and the rear hook of the fiber in the cotton sliver is straightened by using the second process configuration in the drawing process; in the third drawing frame, a plurality of cotton slivers are fed together, and the weight of the cotton sliver is evenly distributed in the drawing process by using the third process configuration.

8. The production method according to claim 7, characterized by, The first roving comprises: The cotton sliver is tensioned under the drafting action of the rear drafting zone composed of rollers and is integrally extracted into a cotton sliver with a required linear density under the drafting action of the front drafting zone composed of aprons; The cotton sliver is twisted into a cotton roving through the driving of the flyer; The cotton roving is continuously wound under the rotation of the bobbin which rotates in the same direction as the flyer, and the linear speed of the bobbin is greater than that of the flyer, and the difference between the linear speeds of the bobbin and the flyer provides power for the winding of the cotton roving.

9. The production method according to any one of claims 1 to 8, characterized by, In the process of the first spinning, the rotational linear speed of the ring traveler is less than that of the bobbin through the friction force between the ring traveler and the ring rail, and the difference between the rotational linear speeds of the ring traveler and the bobbin provides winding power for the core yarn, and a heavy ring traveler is selected in use, so that the rotational speed of the ring traveler is reduced, and the directly generated twisting twist is reduced, and the generated winding effect is enhanced, so that multi-winding and less-twist spinning under high-speed spinning is realized.

10. The method of claim 1, wherein, The combing comprises: The cotton sliver obtained after the pure cotton fibers are subjected to the carding combination is sequentially subjected to combing preparation and combing to obtain a cotton sliver; The first pre-drawing uses multiple cotton slivers to be fed together, and the front hooks in the fed cotton slivers are straightened through the drafting system to obtain a preliminary cotton pre-drawing; The second pre-drawing uses multiple preliminary cotton pre-drawings to be fed together, and the rear hooks in the fed preliminary cotton pre-drawings are straightened through the drafting system to obtain a cotton pre-drawing; The pre-drawing uses multiple groups of cotton pre-drawings to be fed together, and each group of cotton pre-drawings comprises multiple pre-drawings, each group of cotton pre-drawings is combined into a sub-cotton roll after drafting, and the multiple sub-cotton rolls are pressed and combined after being stacked to be output after drafting to obtain a cotton combing roll.

11. The method of claim 1, wherein, The second spinning comprises: The combed cotton roving is fed into the drafting system after being passively unwound, so that the fed combed cotton roving is tensioned under the drafting action of the rear drafting zone composed of rollers, and the slippage between the cotton fibers along the length direction of the roving is realized at the same time; In the process of the slippage of the cotton fibers, the cotton fibers are subjected to reverse torsion due to the twist of the roving to generate untwisting, and the twist uniformly propagates along the length direction of the roving in the untwisting process to obtain a rear sliver; The rear sliver is extracted from the front nipper accessory under the drafting action of the front drafting zone composed of aprons, and under the control of the internal friction field and the external friction field generated by the twist in the rear sliver, the cotton fibers with a required linear density are extracted, and the twist of the cotton fibers is completely removed in the extraction process, so that the cotton sliver with a required linear density is obtained.

12. The method of claim 11, wherein, After the core-spun sliver is obtained, the method further comprises: The core-spun sliver output by the drafting system is subjected to the action of Z-twist twisting from bottom to top, and interacts with the S-twist twisting continuously applied by the core yarn, so that the cotton fibers in the cotton sliver and the cotton fibers in the core yarn are twisted, and a cotton soft yarn is obtained.

13. The method of claim 12, wherein, In the Z twist twisting process, the spindle is driven by the main shaft to rotate in the Z twist direction, and then the bobbin embedded on the spindle is driven to rotate synchronously, the bobbin rotation in turn drives the cotton soft yarn wound thereon to rotate, the cotton soft yarn rotation in turn drives the steel ring passing through to rotate around the steel ring track, the steel ring rotation drives the cotton soft yarn to rotate along the axial direction, thereby generating Z twist twisting twist on the cotton soft yarn, and the generated Z twist twisting twist is transmitted upward along the length direction of the cotton soft yarn.

14. The method of claim 1, wherein, Also comprising: The fine lint cotton fiber is selected for blending, and the length is mainly selected during blending, the selected raw cotton grade difference is not more than 1, and the impurity difference is not more than 0.5%.

15. A cotton wool thread, characterized in that The cotton soft yarn is woven by the preparation method of the cotton soft yarn according to any one of claims 1-14.

16. A fabric, characterized by The cotton soft yarn is woven by the preparation method of the cotton soft yarn according to any one of claims 1-14.

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