A high-efficiency air-jet spinning process special for regenerated cellulose fibers

Abstract

The application discloses a kind of high-efficiency air-jet spinning processes special for regenerated cellulose fiber, comprising the following steps, S1, fiber raw material is premixed;S2, fine capture, mixing evenly;S3, reduce the beating point, and control the speed of each beater;S4, each single machine takes full air supply;S5, reduce the cotton roll roller speed cotton roll weight, short fixed length;S6, carding machine is fully carded and timely transfer fiber;S7, the back hook of drawing frame is reduced, and neps and unevenness are reduced;S8, according to the characteristics of high draft ratio, strong airflow double-nozzle wrapping twist and high speed of air-jet spinning machine, spinning is carried out;S9, the yarn obtained by spinning is wound and packaged, and quality detection is carried out by sampling;The application realizes the effective and rapid production and manufacturing of regenerated cellulose fiber, improves the quality of product, is suitable for enterprise to carry out big production, meets the requirement of enterprise production, and is favorable for enterprise to improve market competitiveness.

Description

Technical Field

[0001] This invention relates to a high-efficiency air-jet spinning process for regenerated cellulose fibers, belonging to the field of textile technology. Background Technology

[0002] Regenerated cellulose fiber is made from natural cellulose without altering its chemical structure, only changing its physical structure to create a higher-performance regenerated cellulose fiber. Its structure is similar to cotton, but its moisture absorption and breathability are better than cotton fiber. It can be said to be the most moisture-absorbing and breathable of all chemical fibers, and is known as "breathable fabric". How to improve the spinning efficiency of regenerated cellulose fiber and ensure that its quality meets the requirements is a problem that enterprises need to solve. Summary of the Invention

[0003] In view of the above-mentioned technical problems, the purpose of this invention is to propose a high-efficiency air-jet spinning process for regenerated cellulose fibers, which realizes product production more efficiently while ensuring product quality.

[0004] The technical solution of this invention is implemented as follows: a high-efficiency air-jet spinning process for regenerated cellulose fibers, comprising the following steps, S1, a dedicated premixing mechanism is used to premix the fiber raw materials; S2, the distance from the rib of the cotton grabber's beater is 2.5 mm, for precise grabbing and uniform mixing; S3, reduce the number of striking points and control the speed of each beater. The speed of the comb beater should be controlled at 500 r / min, and the speed of the combined machine beater should be lower than 800 r / min. S4, each unit adopts full air supply, while reducing the dust bar spacing and increasing the distance between the beater and the dust bar; S5, reduce the speed of the cotton roll roller to 10r / min, and set the cotton roll weight and length. The S6 carding machine adopts the process principle of "light weight, low speed, small spacing, strong combing, more combing and less drop" to fully comb and transfer fibers in a timely manner. The S7 drawing frame adopts the process principle of "multiple drawing, large spacing, heavy pressure, and slow speed" to improve fiber parallel straightness, reduce back hooks, and reduce neps and unevenness. S8, based on the characteristics of the jet spinning machine, such as large draft ratio, strong airflow double nozzle wrapping twisting and high spinning speed, adopts the process principle of "appropriately reducing the total draft and main draft ratio, increasing the interval, increasing the weight and pressure, slowing down the machine speed and strengthening the control" for spinning; S9 involves winding and packaging the spun yarn, and then sampling it for quality testing.

[0005] As a preferred option, in step S1, the relative humidity in the cotton storage room and cotton cleaning workshop is increased, the cotton pile is moistened, regional isolation is adopted, and oil is added as necessary according to the oil content of the cotton.

[0006] As a preferred option, in step S6, the carding machine uses chemical fiber cylinder needle cloth and licker-in saw blade. The main process parameters are: (1) sliver weight 15g / 5m; (2) reduce the speed of each component: cylinder 300r / min, flat plate 97mm / min, doffer 15r / min, licker-in 570r / min; (3) reduce the distance between each component: cylinder-flat plate distance is 0.35mm; cylinder-doffer distance is 0.18mm; cylinder-licker-in distance is 0.23mm; licker-in distance is 0.38mm; (4) use special metal needle cloth for chemical fiber and keep the needle cloth flat, sharp and clean.

[0007] As a preferred option, in step S7, the following process measures are taken for the drawing frame: (1) Drafting distribution: the total drafting of the first drawing is relatively small, the second drawing is relatively large, the third drawing is further increased, and the drafting of the back zone is gradually reduced; (2) the cradle is increased to apply pressure and the roller spacing is increased; (3) a lighter weight is adopted, with the first drawing dry weight being 16.8g / 5m, the second drawing 14.5g / 5m, the third drawing 11g / 5m, and the drawing speed is reduced; (4) the relative humidity of the workshop is controlled at more than 55%, and the cotton sliver is stored in the workshop for more than 24 hours.

[0008] As a preferred embodiment, in step S8, the main process parameters of the air-jet spinning machine are: (1) spinning speed 210m / min; (2) total draft 165 times, main draft 35.8 times; (3) enlarged roller center distance 44mmX41.5mmX44mm, rubber roller center distance 48.5mmX39mmX42mm, distance from front roller to first nozzle 39mm; (4) rubber roller pressure 20daN, 22daN, 22daN, 22daN; (5) nozzle air pressure ratio 0.25, feed ratio 0.98, winding ratio 0.99, collector 2mm.

[0009] As a preferred embodiment, in step S9, the quality inspection indicators are as follows: breaking strength 14.9 cN / tex, strength CV 10.0%, weight deviation +0.4%, weight CV 1.9%, evenness CV 13.11%, fine spots 9 / km, coarse spots 33 / km, and knots 35 / km.

[0010] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: This invention provides a high-efficiency air-jet spinning process for regenerated cellulose fibers. Through improvements and refinements to the air-jet spinning process, it enables efficient and rapid production of regenerated cellulose fibers, achieving more efficient product manufacturing and allowing for strict quality control, thereby enhancing product quality. The preparation method is not complex, making it suitable for large-scale production by enterprises, meeting their production requirements, and helping them improve their market competitiveness. Attached Figure Description

[0011] The technical solution of the present invention will be further described below with reference to the accompanying drawings: Appendix Figure 1 This is a schematic diagram of a high-efficiency air-jet spinning process for regenerated cellulose fibers according to the present invention. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention; all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. The present invention will now be described with reference to the accompanying drawings.

[0013] Example

[0014] As attached Figure 1 The diagram illustrates a high-efficiency air-jet spinning process for regenerated cellulose fibers according to the present invention, comprising the following steps: S1. Use a special premixing mechanism to premix the fiber raw materials; increase the relative humidity in the cotton storage room and cotton cleaning workshop, moisturize the cotton piles, use area isolation, and add oil as necessary according to the oil content of the cotton; if conditions permit, the storage time of fiber bales and rolls can be extended to more than 48 hours to ensure that the cotton rolls are moistened evenly. Steps S2-S5 employ the process principle of "fine grasping, less beating, light combing, less dropping, thin layer, and fast feeding" to reduce the impact and rubbing on the fibers, minimize the formation of cotton knots and short fibers, and improve the uniformity of the cotton lap. S2, the distance from the rib of the cotton grabber's beater is 2.5 mm, for precise grabbing and uniform mixing; S3, reduce the number of striking points and control the speed of each beater. The speed of the comb beater should be controlled at 500 r / min, and the speed of the combined machine beater should be lower than 800 r / min. S4, each unit adopts full air supply, while reducing the dust bar spacing and increasing the distance between the beater and the dust bar; S5, reduce the speed of the cotton roll roller to 10r / min, and set the cotton roll weight and length. S6, the carding machine adopts the process principle of "light weight, low speed, small spacing, strong combing, more combing and less drop" to fully comb and transfer fibers in time; the carding machine uses chemical fiber cylinder card cloth and licker-in saw blade, and the main process parameters are: (1) sliver weight 15g / 5m; (2) reduce the speed of each component: cylinder 300r / min, flat plate 97mm / min, doffer 15r / min, licker-in 570r / min; (3) reduce the spacing of each component: cylinder ~ flat plate spacing is 0.35mm; cylinder ~ doffer spacing is 0.18mm, cylinder ~ licker-in spacing is 0.23mm, licker-in ~ feed plate spacing is 0.38mm; (4) use special metal card cloth for chemical fiber, and keep the card cloth flat, sharp and clean; S7, the drawing frame adopts the process principle of "multiple drawing, large spacing, heavy pressure, and slow speed" to improve the parallel straightness of the fiber, reduce back hooks, and reduce cotton knots and unevenness. The process measures of the drawing frame are: (1) Drafting distribution: the total drafting of the first drawing is smaller, the second drawing is larger, the third drawing is further increased, and the drafting of the back zone is gradually reduced; (2) increase the pressure of the cradle and increase the roller spacing; (3) adopt a lighter weight, with the first drawing weight being 16.8g / 5m, the second drawing weight being 14.5g / 5m, the third drawing weight being 11g / 5m, and the drawing speed being reduced; (4) the relative humidity of the workshop is controlled at more than 55%, and the cotton sliver is stored in the workshop for more than 24 hours. S8. Based on the characteristics of the jet spinning machine, such as large draft ratio, strong airflow double nozzle wrapping twisting and high spinning speed, the process principle of "appropriately reducing the total draft and main draft ratio, increasing the interval, increasing the pressure, slowing down the machine speed and strengthening the control" is adopted for spinning. The main process parameters of the jet spinning machine are: (1) Spinning speed 210m / min; (2) Total draft 165 times, main draft 35.8 times; (3) Increased roller center distance, which is 44mmX41.5mmX44mm, rubber roller center distance is 48.5mmX39mmX42mm, and the distance from the front roller to the first nozzle is 39mm; (4) Rubber roller pressure is 20daN, 22daN, 22daN, 22daN; (5) Nozzle air pressure ratio is 0.25, feed ratio is 0.98, winding ratio is 0.99, and collector is 2mm. S9. The spun yarn is wound and packaged, and samples are taken for quality inspection. The quality inspection indicators are as follows: breaking strength 14.9 cN / tex, strength CV 10.0%, weight deviation +0.4%, weight CV 1.9%, yarn evenness CV 13.11%, fine spots 9 / km, thick spots 33 / km, and neps 35 / km.

[0015] This invention provides a high-efficiency air-jet spinning process for regenerated cellulose fibers. Through improvements and refinements to the air-jet spinning process, it enables efficient and rapid production of regenerated cellulose fibers, achieving more efficient product manufacturing and allowing for strict quality control, thereby enhancing product quality. The preparation method is not complex, making it suitable for large-scale production by enterprises, meeting their production requirements, and helping them improve their market competitiveness.

[0016] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency air-jet spinning process specifically for regenerated cellulose fibers, characterized in that: Includes the following steps, S1, a dedicated premixing mechanism is used to premix the fiber raw materials; S2, the distance from the rib of the cotton grabber's beater is 2.5 mm, for precise grabbing and uniform mixing; S3, reduce the number of striking points and control the speed of each beater. The speed of the comb beater should be controlled at 500 r / min, and the speed of the combined machine beater should be lower than 800 r / min. S4, each unit adopts full air supply, while reducing the dust bar spacing and increasing the distance between the beater and the dust bar; S5, reduce the speed of the cotton roll roller to 10r / min, and set the cotton roll weight and length. The S6 carding machine adopts the process principle of "light weight, low speed, small spacing, strong combing, more combing and less drop" to fully comb and transfer fibers in a timely manner. The S7 drawing frame adopts the process principle of "multiple drawing, large spacing, heavy pressure, and slow speed" to improve fiber parallel straightness, reduce back hooks, and reduce neps and unevenness. S8, based on the characteristics of the jet spinning machine, such as large draft ratio, strong airflow double nozzle wrapping twisting and high spinning speed, adopts the process principle of "appropriately reducing the total draft and main draft ratio, increasing the interval, increasing the weight and pressure, slowing down the machine speed and strengthening the control" for spinning; S9 involves winding and packaging the spun yarn, and then sampling it for quality testing. In step S6, the carding machine uses chemical fiber cylinder needle cloth and licker-in saw blade. The main process parameters are: (1) sliver weight 15g / 5m; (2) reduce the speed of each component: cylinder 300r / min, flat plate 97mm / min, doffer 15r / min, licker-in 570r / min; (3) reduce the distance between each component: cylinder-flat plate distance is 0.35mm; cylinder-doffer distance is 0.18mm; cylinder-licker-in distance is 0.23mm; licker-in distance is 0.38mm; (4) use special metal needle cloth for chemical fiber and keep the needle cloth flat, sharp and clean. In step S7, the following process measures are taken for the drawing frame: (1) Drafting distribution: the total drafting of the first drawing is relatively small, the second drawing is relatively large, the third drawing is further increased, and the drafting in the back zone is gradually reduced; (2) the cradle is increased in pressure and the roller spacing is increased; (3) a lighter weight is adopted, with the first drawing dry weight being 16.8g / 5m, the second drawing 14.5g / 5m, the third drawing 11g / 5m, and the drawing speed is reduced; (4) the relative humidity in the workshop is controlled at more than 55%, and the sliver is stored in the workshop for more than 24 hours. In step S8, the main process parameters of the air-jet spinning machine are: (1) spinning speed 210m / min; (2) total draft 165 times, main draft 35.8 times; (3) center distance of the enlarged rollers is 44mmX41.5mmX44mm, center distance of the rubber rollers is 48.5mmX39mmX42mm, and distance from the front roller to the first nozzle is 39mm; (4) pressure of the rubber rollers is 20daN, 22daN, 22daN, 22daN; (5) nozzle air pressure ratio is 0.25, feed ratio is 0.98, winding ratio is 0.99, and collector is 2mm. In step S1, the relative humidity in the cotton storage room and cotton cleaning workshop is increased, the cotton pile is moisturized, area isolation is adopted, and oil is added according to the oil content of the cotton. In step S9, the quality inspection indicators are as follows: breaking strength 14.9 cN / tex, strength CV 10.0%, weight deviation +0.4%, weight CV 1.9%, evenness CV 13.11%, fine spots 9 / km, thick spots 33 / km, and knots 35 / km.

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