Functional rotor spinning blended yarn and production method thereof

Abstract

The invention discloses a functional rotor spinning blended yarn and a production method thereof, and belongs to the technical field of spinning. The functional rotor spinning blended yarn comprises, by mass, 40-60% of bamboo fibers and 40-60% of cotton fibers. The performance indexes of the bamboo fibers are as follows: the specification is 1.33 dtex * 38 mm, the specific strength of the fibers is 2-2.3 cN / dtex, and the elongation at break is 15-17%; the performance indexes of the cotton fiber are as follows: the length is 28-29.5 mm, the breaking strength is 2.8-2.9 CN / dtex, and the micronaire value is 3.5-3.7. In addition, the invention further provides a production method of the functional rotor spinning blended yarn, and the functional rotor spinning blended yarn is obtained through a blowing procedure, a cotton carding procedure, a drawing procedure and a rotor spinning procedure in sequence. According to the functional rotor spinning blended yarn, the end breakage rate of the rotor spinning blended yarn is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of textile technology, specifically to a functional air-jet spun blended yarn and its production method. Background Technology

[0002] Air-jet spinning is a novel spinning technology that uses airflow to condense and twist fibers within a high-speed rotating spinning cup to produce yarn. The carding rollers grip and comb the fed cotton sliver fibers, using centrifugal force generated by their high-speed rotation to fling the gripped fibers out. Inside the spinning cup, the fibers are continuously stretched and extended by the airflow, making them more parallel and elongated. Under centrifugal force, they are condensed and twisted into yarn by the airflow.

[0003] In existing technologies for producing air-jet spun functional fibers, the relatively long fiber length makes them difficult to stretch and coalesce during high-speed rotation in the spinning cup, easily leading to a high breakage rate. To address this issue, the industry commonly employs large-diameter spinning cups or physically cuts the functional fibers to improve spinnability. However, these methods have significant drawbacks: large-diameter spinning cups increase equipment energy consumption and production costs, and require more suitable production facilities; cutting the fibers shortens the natural properties of the functional fibers, resulting in a significant decrease in the functionality (such as antibacterial and breathable properties) and mechanical properties of the yarn, making it difficult to meet the needs of high-end textiles.

[0004] Therefore, developing an air-jet spun blended yarn and its production method that does not require cutting short fibers or increasing the diameter of the spinning cup, can effectively reduce the breakage rate, and simultaneously take into account the functionality and mechanical properties of the yarn, has become an urgent technical problem to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a functional air-jet spun blended yarn and its production method, thereby solving the technical problem of how to effectively reduce the breakage rate of air-jet spun blended yarn in the prior art.

[0006] To achieve the above technical objectives, the present invention provides a functional air-jet spun blended yarn, wherein the mass percentage of bamboo fiber is 40-60% and the mass percentage of cotton fiber is 40-60%.

[0007] In any embodiment, the performance indicators of the bamboo fiber include: a size of 1.33 dtex * 38 mm, a fiber strength of 2-2.3 cN / dtex, and a breaking elongation of 15-17%; the performance indicators of the cotton fiber include: a length of 28-29.5 mm, a breaking strength of 2.8-2.9 CN / dtex, and a micronaire value of 3.5-3.7.

[0008] In addition, the present invention also proposes a method for producing the above-mentioned functional air-jet spun blended yarn, which is obtained by sequentially passing through a cleaning process, a carding process, a drawing process and an air-jet spinning process; wherein in the air-jet spinning process, the spinning cup speed is 135,000-140,000 rpm and the carding roller speed is 9,000-9,500 rpm.

[0009] In any embodiment, the air-jet spinning twist is 810-900 twists / meter in the air-jet spinning process.

[0010] In any embodiment, in the air-jet spinning process, the spinning cup model is T631BD, the twist-blocking head is a K4-A twist-blocking head, the combing roller is B-174-DN, and the false twister is white.

[0011] In any embodiment, in the air-jet spinning process, the parameters for electro-cleaning and defect cutting are set as follows: for short yarn defects, the length is set to 2cm-640cm and the diameter is set to -40%-32%; for long yarn defects, the grade is 5, the length is set to 0.64-10mm and the diameter is set to -14%-24%.

[0012] In any embodiment, the drawing process involves one pre-drawing and two drawing processes. The first pre-drawing is bamboo fiber pre-drawing with a dry weight of 26-28g / 5m and a spacing of 12*20, resulting in 8 slivers being drawn together. The second drawing process involves 6 slivers being drawn together, consisting of 1-3 fine cotton slivers and 3-5 bamboo fiber pre-drawing slivers with a dry weight of 23-25g / 5m and a spacing of 12*20. The third drawing process involves a dry weight of 23-25g / 5m and a spacing of 12*20, resulting in 6 slivers being drawn together.

[0013] In any embodiment, during the carding process, the cylinder speed is 320 r / min, the flatplate speed is 1.2 m / min, the 5-point spacing between the cylinder and the flatplate is 11 filaments × 10 filaments × 10 filaments × 10 filaments × 11 filaments, and the licker-in speed is 900 r / min.

[0014] In any embodiment, in the opening process, the dry weight of the cotton roll is 345g / m; in the carding process, the dry weight of the bamboo fiber carding is 20g / 5m, and the distance between the licker-in roller and the small bottom is 5×0.5×2mm.

[0015] Compared with the prior art, the beneficial effects of the present invention include: the functional air-jet spun blended yarn proposed in the present invention includes bamboo fiber and cotton fiber. Using uncut bamboo fiber, the yarn undergoes opening, carding, drawing, and air-jet spinning processes in sequence. By reasonably adjusting the process parameters, a 30-count air-jet spun yarn is obtained through blending using a small spinning cup. The resulting functional air-jet spun blended yarn has natural antibacterial, anti-mite, and deodorizing functions. The fabric woven from it is soft, breathable, wrinkle-resistant, and easy to care for. The resulting functional air-jet spun blended yarn effectively reduces the breakage rate of air-jet spun blended yarn. Detailed Implementation

[0016] The "range" disclosed in this application is defined by a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, which define the boundaries of a particular range. Ranges defined in this way can include or exclude endpoints and can be arbitrarily combined; that is, any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60~120 and 80~110 are listed for a specific parameter, it is also expected that ranges of 60~110 and 80~120 are also included. Furthermore, if minimum range values ​​of 1 and 2 are listed, and if maximum range values ​​of 3, 4, and 5 are listed, then the following ranges are all expected: 1~3, 1~4, 1~5, 2~3, 2~4, and 2~5. In this application, unless otherwise stated, the numerical range "a~b" represents a shortened representation of any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0~5" indicates that all real numbers between "0~5" have been listed in this article; "0~5" is simply a shortened representation of these numerical combinations. Furthermore, when a parameter is stated as an integer ≥2, it is equivalent to disclosing that the parameter is, for example, an integer such as 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0017] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0018] Unless otherwise specified, the term "or" is inclusive in this application. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, the condition "A or B" is satisfied by any of the following conditions: A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0019] This specific embodiment provides a functional air-jet spun blended yarn, with bamboo fiber accounting for 40-60% by weight and cotton fiber accounting for 40-60% by weight. The performance indicators of the bamboo fiber include: a size of 1.33 dtex * 38 mm, a fiber strength of 2-2.3 cN / dtex, and a breaking elongation of 15-17%. The performance indicators of the cotton fiber include: a length of 28-29.5 mm, a breaking strength of 2.8-2.9 cN / dtex, and a micronaire value of 3.5-3.7.

[0020] In addition, this specific embodiment also proposes a method for producing the above-mentioned functional air-jet spun blended yarn, which is obtained by sequentially passing through a cleaning process, a carding process, a drawing process and an air-jet spinning process; In the opening and cleaning process, the dry weight of the cotton roll is 345g / m; In the carding process, the dry weight of bamboo fiber carding is 20g / 5m, the distance between the licker-in roller and the small bottom is 5×0.5×2mm; the cylinder speed is 320r / min, the flat plate speed is 1.2m / min, the 5-point distance between the cylinder and the flat plate is 11 filaments×10 filaments×10 filaments×10 filaments×11 filaments, and the licker-in roller speed is 900r / min; In the drawing process, there is one pre-drawing and two drawing processes. The first pre-drawing is bamboo fiber pre-drawing, with a dry weight of 26-28g / 5m, a spacing of 12*20, and 8 slivers drawn together. The second drawing process involves 6 slivers drawn together, which are divided into 1-3 fine cotton slivers and 3-5 bamboo fiber pre-drawing slivers, with a dry weight of 23-25g / 5m and a spacing of 12*20. The third drawing process also involves 6 slivers drawn together, with a dry weight of 23-25g / 5m and a spacing of 12*20. In the air-jet spinning process, the spinning cup speed is 135,000-140,000 rpm, the carding roller speed is 9,000-9,500 rpm, the air-jet spinning twist is 810-900 twists / meter, the spinning cup model is T631BD, the twist-blocking head is K4-A, the carding roller uses B-174-DN, and a white false twister is used; the electric cleaning and defect-cutting parameters are set as follows: short yarn defect length is set to 2cm-640cm, diameter is -40%-32%, long yarn defect grade is 5, length is 0.64-10mm, diameter is -14%-24%.

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] In this invention, the terms "some embodiments," "this embodiment," and examples are used to describe a subset of all possible embodiments. However, it is understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0023] If the application documents contain similar descriptions such as "first / second", the following explanation shall be added: In the following description, the terms "first / second / third" are used only to distinguish similar objects and do not represent a specific ordering of objects. It is understood that "first / second / third" may be interchanged in a specific order or sequence where permitted, so that the embodiments described herein can be implemented in a different order than that described herein.

[0024] In this embodiment, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, object A and / or object B can represent three situations: object A exists alone, object A and object B exist simultaneously, and object B exists alone.

[0025] The following describes embodiments of this application. The embodiments described below are exemplary and are only used to explain this application, and should not be construed as limiting this application. Where specific techniques or conditions are not specified in the embodiments, they are performed according to the techniques or conditions described in the literature in this field or according to the product instructions. Reagents or instruments used, unless otherwise specified, are all conventional products that can be obtained commercially.

[0026] The equipment used in the following embodiments or comparative production lines includes: A002C automatic cotton grabber, A036B porcupine cotton opener, A092A double cotton box cotton feeder, A076C lap machine, A186 carding machine, RSB22 drawing frame, and Celford A9 air-jet spinning machine.

[0027] Example 1 This embodiment proposes a functional air-jet spun blended yarn, with bamboo fiber accounting for 60% by mass and cotton fiber accounting for 40% by mass. The performance indicators of the bamboo fiber include: 1.33dtex*38mm, fiber strength 2.0cN / dtex, and elongation at break 15%. The performance indicators of the cotton fiber include: length 28mm, breaking strength 2.8cN / dtex, and micronaire value 3.5.

[0028] In addition, this embodiment also proposes a method for producing the above-mentioned functional air-jet spun blended yarn, which is obtained by sequentially passing through a cleaning process, a carding process, a drawing process and an air-jet spinning process; In the opening and cleaning process, the dry weight of the cotton roll is 345g / m; In the carding process, the dry weight of bamboo fiber carding is 20g / 5m, the distance between the licker-in roller and the small bottom is 5×0.5×2mm; the cylinder speed is 320r / min, the flat plate speed is 1.2m / min, the 5-point distance between the cylinder and the flat plate is 11 filaments×10 filaments×10 filaments×10 filaments×11 filaments, and the licker-in roller speed is 900r / min; In the drawing process, there is one pre-drawing and two drawing processes. The first pre-drawing is bamboo fiber pre-drawing with a dry weight of 26g / 5m, a spacing of 12*20mm, and 8 slivers are drawn together. The first drawing process involves 6 slivers (1 fine cotton sliver + 5 bamboo fiber pre-drawing slivers) with a dry weight of 23g / 5m and a spacing of 12×20mm. The second drawing process also involves 23g / 5m with a dry weight of 12×20mm and 6 slivers drawn together. In the air-jet spinning process, the air-jet spinning is carried out on a Celford Autocoro9 fully automatic air-jet spinning machine. During the production process, the electro-cleaning defect rate and breakage rate are controlled. The spinning cup speed is 135,000 rpm, the carding roller speed is 9,000 rpm, and the twist is 810 twists / meter. The spinning cup model is T631BD, the twist-blocking head is K4-A, the carding roller is B-174-DN, and the white false twister is used. The electro-cleaning defect parameters are (short segments: length 2-640cm, diameter -40%~32%; long segments: grade 5, length 0.64-10mm, diameter -14%~24%), resulting in an air-jet spun yarn with a count of 30.

[0029] Example 2 This embodiment proposes a functional air-jet spun blended yarn, with bamboo fiber accounting for 50% by mass and cotton fiber accounting for 50% by mass. The performance indicators of the bamboo fiber include: 1.33dtex*38mm, fiber strength 2.15cN / dtex, and elongation at break 16%. The performance indicators of the cotton fiber include: length 28.8mm, breaking strength 2.85cN / dtex, and micronaire value 3.6.

[0030] In addition, this embodiment also proposes a method for producing the above-mentioned functional air-jet spun blended yarn, which is obtained by sequentially passing through a cleaning process, a carding process, a drawing process and an air-jet spinning process; Cleaning process: Cotton lap dry weight 345g / m; Carding process: Same as in Example 1; Drawing process: Same as in Example 1; Air-jet spinning process: Air-jet spinning is carried out on a Celford Autocoro9 fully automatic air-jet spinning machine. During the production process, the electric cleaning and cutting defects and the breakage rate are controlled. The spinning cup speed is 138,000 rpm, the combing roller speed is 9,250 rpm, and the twist is 850 twists / meter. The other parameters are the same as in Example 1, and an air-jet spun yarn with a count of 30 is obtained.

[0031] Example 3 This embodiment proposes a functional air-jet spun blended yarn, with bamboo fiber accounting for 60% by mass and cotton fiber accounting for 40% by mass. The performance indicators of the bamboo fiber include: 1.33dtex*38mm, fiber strength 2.3cN / dtex, and elongation at break 17%. The performance indicators of the cotton fiber include: length 29.5mm, breaking strength 2.9cN / dtex, and micronaire value 3.7.

[0032] In addition, this embodiment also proposes a method for producing the above-mentioned functional air-jet spun blended yarn, which is obtained by sequentially passing through a cleaning process, a carding process, a drawing process and an air-jet spinning process; Cleaning process: Cotton lap dry weight 345g / m; Carding process: Same as in Example 1; Drawing process: Same as in Example 1; Air-jet spinning process: Air-jet spinning is carried out on a Celford Autocoro9 fully automatic air-jet spinning machine. During the production process, the electric cleaning and cutting defects and the breakage rate are controlled. The spinning cup speed is 138,000 rpm, the combing roller speed is 9,250 rpm, and the twist is 850 twists / meter. The other parameters are the same as in Example 1, and an air-jet spun yarn with a count of 30 is obtained.

[0033] Comparative Example 1 This comparative example presents a functional air-jet spun blended yarn, with bamboo fiber accounting for 50% by mass and cotton fiber accounting for 50% by mass. The performance indicators of the bamboo fiber include: a size of 1.33 dtex * 38 mm, a fiber strength of 2.0 cN / dtex, and an elongation at break of 15%. The performance indicators of the cotton fiber include: a length of 28 mm, a breaking strength of 2.8 cN / dtex, and a micronaire value of 3.5.

[0034] In addition, this embodiment also proposes a production method for the above-mentioned functional air-jet spun blended yarn, which is obtained by sequentially passing through the opening process, carding process, drawing process and air-jet spinning process; this comparative example adopts the conventional air-jet spinning process of the prior art, with a spinning cup diameter of 60mm (large diameter spinning cup), a spinning cup speed of 120000rpm, a carding roller speed of 8500rpm, and a twist of 780 twists / meter; the remaining process parameters are the same as those in Example 2.

[0035] Comparative Example 2 This comparative example presents a functional air-jet spun blended yarn, with bamboo fiber accounting for 30% by mass and cotton fiber accounting for 70% by mass. The performance indicators of the bamboo fiber include: a size of 1.33 dtex * 38 mm, a fiber strength of 2.0 cN / dtex, and an elongation at break of 15%. The performance indicators of the cotton fiber include: a length of 28 mm, a breaking strength of 2.8 cN / dtex, and a micronaire value of 3.5.

[0036] Furthermore, the production method of the functional air-jet spun blended yarn in this comparative example is the same as that in Example 2.

[0037] Comparative Example 3 This comparative example presents a functional air-jet spun blended yarn, with bamboo fiber accounting for 50% by mass and cotton fiber accounting for 50% by mass. The performance indicators of the bamboo fiber include: a size of 1.33 dtex * 38 mm, a fiber strength of 2.0 cN / dtex, and an elongation at break of 15%. The performance indicators of the cotton fiber include: a length of 28 mm, a breaking strength of 2.8 cN / dtex, and a micronaire value of 3.5.

[0038] The drawing process of the production method of the functional air-jet spun blended yarn in this comparative example is adjusted as follows: the pre-drawing dry weight is 25g / 5m, the first drawing is 5 strands (2 cotton + 3 bamboo), and the second drawing dry weight is 22g / 5m; the remaining process parameters are the same as in Example 2.

[0039] Each embodiment and comparative example produced 3 batches, with 10 rolls (100m each) sampled from each batch. After removing 5m from the beginning and end of the roll, the existing testing methods were used for testing, and the results were taken as the average of the 3 batches. The results are shown in Table 1.

[0040] Table 1 As shown in Table 1, the performance of all embodiments is significantly better than that of Comparative Example 1. Example 2 has a lower breakage rate and lower yarn evenness CV% than Comparative Example 1, and its breaking strength is significantly improved. This proves that the solution proposed in this invention solves the core problem of high breakage rate in long fiber air-jet spinning in the prior art without cutting short fibers or increasing the spinning cup diameter, and also produces yarn with better quality and functionality. Comparative Example 2 has a bamboo fiber content of only 30%, lower than the initial draft's lower limit of 40%, indicating insufficient fiber cohesion and a higher breakage rate. This demonstrates that exceeding the specified raw material ratio will seriously affect product performance. Comparative Example 3 shows decreased fiber parallelism and yarn evenness, a significantly increased breakage rate compared to Example 2, and a significantly increased number of yarn defects, verifying the importance of precise parameter design for the drawing process proposed in this invention.

[0041] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A functional air-jet spun blended yarn, characterized in that, The bamboo fiber accounts for 40-60% of the total weight, and the cotton fiber accounts for 40-60% of the total weight.

2. The functional air-jet spun blended yarn according to claim 1, characterized in that, The performance indicators of the bamboo fiber include: a size of 1.33 dtex * 38 mm, a fiber strength of 2-2.3 cN / dtex, and an elongation at break of 15-17%; and / or, the performance indicators of the cotton fiber include: a length of 28-29.5 mm, a breaking strength of 2.8-2.9 CN / dtex, and a micronaire value of 3.5-3.

7.

3. A method for producing the functional air-jet spun blended yarn according to any one of claims 1-2, characterized in that, The product is manufactured by sequentially passing through the cleaning process, carding process, drawing process, and air-jet spinning process; wherein in the air-jet spinning process, the spinning cup speed is 135,000-140,000 rpm and the carding roller speed is 9,000-9,500 rpm.

4. The method for producing functional air-jet spun blended yarn according to claim 3, characterized in that, In the air-jet spinning process, the air-jet spinning twist is 810-900 twists / meter.

5. The method for producing functional air-jet spun blended yarn according to claim 3, characterized in that, In the air-jet spinning process, the spinning cup model is T631BD, the twist-blocking head is K4-A twist-blocking head, the combing roller is B-174-DN, and the false twister is white.

6. The method for producing functional air-jet spun blended yarn according to claim 3, characterized in that, In the air-jet spinning process, the parameters for electro-cleaning and defect cutting are set as follows: for short yarn defects, the length is set to 2cm-640cm and the diameter is set to -40%-32%; for long yarn defects, the grade is 5, the length is set to 0.64-10mm and the diameter is set to -14%-24%.

7. The method for producing functional air-jet spun blended yarn according to claim 3, characterized in that, In the drawing process, there is one pre-drawing and two drawing processes. The first pre-drawing is bamboo fiber pre-drawing, with a dry weight of 26-28g / 5m, a spacing of 12*20, and 8 slivers drawn together. The second drawing process involves 6 slivers drawn together, which are divided into 1-3 fine cotton slivers and 3-5 bamboo fiber pre-drawing slivers, with a dry weight of 23-25g / 5m and a spacing of 12*20. The third drawing process involves a dry weight of 23-25g / 5m, a spacing of 12*20, and 6 slivers drawn together.

8. The method for producing functional air-jet spun blended yarn according to claim 3, characterized in that, In the carding process, the cylinder speed is 320 r / min, the flatplate speed is 1.2 m / min, the 5-point spacing between the cylinder and the flatplate is 11 filaments × 10 filaments × 10 filaments × 10 filaments × 11 filaments, and the licker-in speed is 900 r / min.

9. The method for producing functional air-jet spun blended yarn according to claim 3, characterized in that, In the opening process, the dry weight of the cotton roll is 345g / m; in the carding process, the dry weight of the bamboo fiber carding is 20g / 5m, and the distance between the licker-in roller and the small bottom is 5×0.5×2mm.

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