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CN-116837507-B - Production method of regenerated polyester and cotton blended yarn

CN116837507BCN 116837507 BCN116837507 BCN 116837507BCN-116837507-B

Abstract

The invention discloses a production method of a regenerated polyester and cotton blended yarn, which comprises the following steps of (1) blowing and carding, wherein regenerated polyester fibers and cotton fibers are respectively subjected to respective blowing and carding processes to obtain regenerated polyester raw strips and cotton raw strips, (2) mixing, wherein the regenerated polyester raw strips are subjected to pre-drawing to obtain regenerated polyester pre-drawing, the cotton raw strips are subjected to pre-drawing to obtain cotton pre-drawing, and the regenerated polyester pre-drawing and the cotton pre-drawing are subjected to three-way drawing to obtain regenerated polyester cotton drawn yarns, and (3) forming yarns, namely sequentially subjected to roving, spinning and spooling processes to obtain the regenerated polyester and cotton blended yarn. According to the invention, the regenerated polyester pre-drawing and the cotton pre-drawing which are respectively and independently prepared are respectively drawn, then are combined by pressing up and down through the first drawing, are jointly drawn after being pressed up and down through the second drawing, are transversely combined in parallel through the third drawing, and are jointly drawn, so that the uniform mixing effect of the regenerated polyester fibers and the cotton fibers is realized, and the production of the blended yarn with excellent comprehensive performance is realized.

Inventors

  • JI YIJUN
  • YANG YANG
  • CUI YIHUAI
  • SHAO GUODONG
  • SU XUZHONG
  • LIU XINJIN

Assignees

  • 南通双弘纺织有限公司

Dates

Publication Date
20260508
Application Date
20230510

Claims (5)

  1. 1. The production method of the regenerated polyester and cotton blended yarn is characterized by comprising the following steps of: (1) Blowing and carding, namely respectively preparing regenerated polyester raw strips and cotton raw strips from the selected regenerated polyester fibers and cotton fibers through respective blowing and carding procedures; for the regenerated polyester fiber, sequentially carrying out disc cotton grabbing, a metal spark two-in-one detector, multi-bin cotton mixing, cotton opening and cotton carding on the selected regenerated polyester fiber to prepare regenerated polyester raw strips; For cotton fibers, sequentially passing the selected mixed cotton fibers through a disc plucker, a metal Mars two-in-one detector, an airflow separator, a heavy object separator, a single-shaft cotton opening machine, a multi-bin mixed cotton, a porcupine cotton opening machine, a cotton spinning foreign fiber remover and a cotton carding machine to prepare cotton raw strips; in the cotton mixing process, air flow mixing, lamination mixing and dense mixing are sequentially adopted to fully mix selected cotton fibers or regenerated polyester fibers; (2) Mixing, namely pre-drawing the regenerated polyester raw sliver obtained in the step (1) to obtain regenerated polyester pre-drawing and pre-drawing the cotton raw sliver to obtain cotton pre-drawing, and drawing the regenerated polyester pre-drawing and the cotton pre-drawing together for three times to obtain regenerated polyester cotton ripe sliver; The first drawing, namely feeding an even number of regenerated terylene pre-drawing and an even number of cotton pre-drawing together, wherein the total number of the fed regenerated terylene pre-drawing and cotton pre-drawing is between 4 and 8, dividing the fed regenerated terylene pre-drawing and cotton pre-drawing into two groups, and the number of the regenerated terylene pre-drawing and the cotton pre-drawing in each group is consistent, and feeding the regenerated terylene pre-drawing and the cotton pre-drawing into a feeding system, a drawing system and a winding system of a first drawing device from back to front along the movement direction of the fiber in the first drawing to obtain a regenerated terylene cotton mixed strip; The first drawing device comprises a feeding system, a drafting system and a winding system, wherein the feeding system comprises an upper press roller pair and a lower press roller pair, an upper rear gathering horn mouth is arranged at the rear side of the upper press roller pair, a lower rear gathering horn mouth is arranged at the rear side of the lower press roller pair, the upper rear gathering horn mouth and the lower rear gathering horn mouth have the same structure, the cross sections of the upper rear gathering horn mouth and the lower rear gathering horn mouth are elliptical structures, the length of the long axis of the ellipse of the cross section from the rear to the front along the length direction of the upper rear gathering horn mouth and the lower rear gathering horn mouth is gradually reduced, the eccentricity is gradually increased, the structures of the upper press roller pair and the lower press roller pair are the same, the upper press roller pair and the lower press roller pair comprise an upper roller and a lower roller, the lower roller is driven to rotate by a corresponding transmission mechanism, the upper roller and the lower roller comprise middle roller shafts, the middle roller shafts are solid cylindrical structures of steel, the middle roller shafts of the lower roller shafts are sleeved with lower roller sleeves, the middle roll shaft of the upper roll of the upper press roll pair is connected with the middle roll shaft of the upper roll of the lower press roll pair through a corresponding pressure rod, the upper end of the pressure rod is connected with the middle roll shaft of the upper roll of the upper press roll pair through an upper spring pressurizing assembly, the lower end of the pressure rod is connected with the middle roll shaft of the upper roll of the lower press roll pair through a lower spring pressurizing assembly, the upper spring pressurizing assembly and the lower spring pressurizing assembly are identical in structure, when the pressure rod is pressed down by adopting a certain pressure, the upper spring pressing component and the lower spring pressing component are in a pressing locking state, so that certain pressure contact is kept between the upper roller and the lower roller of the upper press roller pair and between the upper roller and the lower roller of the lower press roller pair, and when the pressure rod is pulled up by adopting a certain pressure, the upper spring pressing component and the lower spring pressing component are in an extending locking state, so that certain intervals are kept between the upper roller and the lower roller of the upper press roller pair and between the upper roller and the lower roller of the lower press roller pair; The upper drafting system is positioned in front of the upper compression roller pair, the lower drafting system is positioned in front of the lower compression roller pair, the upper drafting system and the lower drafting system have the same structure, the upper drafting system and the lower drafting system comprise a rear drafting roller pair, a middle drafting roller pair and a front drafting roller pair, the rear drafting roller pair comprises a rear lower roller and a rear upper rubber roller, the middle drafting roller pair comprises a middle lower roller and an upper rubber roller, the front drafting roller pair comprises a front lower roller and a front upper rubber roller, the rear upper rubber roller, the upper rubber roller and the front upper rubber roller of the lower drafting system are respectively kept at a certain distance with the rear lower roller, the middle lower roller and the front lower roller of the upper drafting system, the rear lower roller of the upper drafting system, the middle lower roller and the front lower roller of the upper drafting system are respectively, The middle lower roller and the front lower roller are respectively connected with the rear lower roller, the middle lower roller and the front lower roller of the lower drafting system through belt transmission, the rear upper rubber roller, the middle upper rubber roller and the front upper rubber roller of the upper drafting system are respectively connected with the rear upper rubber roller, the middle upper rubber roller and the front upper rubber roller of the lower drafting system through pressure transmission connecting rods, a pressurizing rod is arranged among the rear upper rubber roller, the middle upper rubber roller and the front upper rubber roller of the upper drafting system, and when the pressurizing rod is on a platform, the rear upper rubber roller, the middle upper rubber roller and the front upper rubber roller of the upper drafting system are respectively kept at a certain distance with the rear lower roller, the middle lower roller and the front lower roller of the upper drafting system, and at the moment, the rear upper rubber roller of the upper drafting system, The upper rubber roll and the front rubber roll respectively keep a certain distance with the rear lower roller, the middle lower roller and the front lower roller of the lower drafting system through corresponding pressure transmission connecting rods, and when the pressurizing rod is pressed downwards, the upper rubber roll, the front rubber roll respectively and tightly press with the rear lower roller, the middle lower roller and the front lower roller of the upper drafting system, and at the moment, the upper rubber roll and the front rubber roll respectively of the upper drafting system respectively and tightly press with the rear lower roller, the middle lower roller and the front lower roller of the lower drafting system through corresponding pressure transmission connecting rods, so that the upper rubber roll, the upper rubber roll and the front rubber roll of the lower drafting system respectively and tightly press with the rear lower roller, the upper rubber roll and the front rubber roll of the lower drafting system, Middle bottom roller, the front lower roller is tightly pressed, a front press roller pair is arranged in the middle of the front of the upper drafting system and the front of the lower drafting system, the front press roller pair comprises a front upper roller and a front lower roller, the front upper roller and the front lower roller have the same structure, the front upper roller and the front lower roller comprise an intermediate shaft, a pressing sleeve is sleeved on the intermediate shaft and is connected with the intermediate shaft through a bearing, the pressing sleeve freely rotates around the intermediate shaft, the intermediate shaft of the front upper roller is connected with the intermediate shaft of the front lower roller through a knob type pressing component, the knob type pressing component comprises an upper pressure spring and a lower pressure spring, the upper pressure spring is connected with the lower pressure spring through a pressing knob, when the pressing knob is rotated anticlockwise with a certain force, the pressing knob is closed, so that the upper pressure spring and the lower pressure spring are in elastic tension at the moment and then keep tightly pressed between the front upper roller and the front lower roller, when the pressing knob is rotated clockwise with a certain force, the pressing knob is opened, so that the upper pressure spring and the lower pressure spring at the moment are in natural extension and then keep a certain distance between the front upper roller and the front lower roller, a front gathering bell mouth is arranged at the front part of the front press roller pair, the cross section of the front gathering bell mouth is of an oval structure, the length of the long axis of the oval of the cross section from back to front is gradually reduced along the length direction of the front gathering bell mouth, The eccentricity is gradually reduced, so that the output regenerated polyester cotton mixed strips are gradually combined and re-form a space ellipse from a plane state; The winding system comprises a coiling disc, a land disc and a coiling barrel, wherein the coiling barrel is hollow and is cylindrical, the top end of the coiling barrel is open, the bottom end of the coiling barrel is closed and embedded in the land disc, a coiling spring is fixed on a chassis of the coiling barrel, the lower end of the coiling spring is fixed on the round surface of the bottom end of the coiling barrel, a coiling disc is arranged at the upper end of the coiling spring and is of a round structure, the diameter of the coiling disc is smaller than that of the coiling barrel, the coiling disc is driven to rotate by a corresponding transmission mechanism, and the land disc is driven to rotate by the corresponding transmission mechanism, and the rotation direction of the coiling disc is the same as that of the land disc; The method comprises the steps that a first group of regenerated polyester pre-drawing and a second group of regenerated polyester pre-drawing are fed into an upper drafting system and a lower drafting system respectively through an upper gathering horn mouth and a lower gathering horn mouth, so that the first group of regenerated polyester pre-drawing and the second group of regenerated polyester pre-drawing are gradually converted into a horizontal plane shape from a cylindrical shape in space, gradual merging is realized in the conversion process, the first group of regenerated polyester pre-drawing and the cotton pre-drawing after merging are further converted into a plane shape after being pressed by an upper compression roller and fed into the upper drafting system, a first regenerated polyester cotton mixed strip with reduced linear density is obtained after the drafting action in the upper drafting system, a certain gap is kept between fibers, the second group of regenerated polyester pre-drawing and the cotton pre-drawing after being merged are further converted into a plane shape after being pressed by a lower compression roller, a second regenerated polyester cotton mixed strip with reduced linear density is obtained after the drafting action in the lower drafting system, and is enabled to be kept in a certain gap between fibers after being pressed by the lower drafting system, the first regenerated polyester cotton mixed strip is enabled to be in a mixed state after being pressed by the upper drafting roller, the regenerated polyester cotton mixed strip is enabled to be in the mixed plane shape after being pressed by the first compression roller, and the regenerated cotton mixed strip is enabled to be mutually mixed, and the regenerated cotton mixed and the regenerated cotton is enabled to be in the mixed to be a mixed with the plane after the regenerated cotton mixed fiber is mutually-mixed by the upper drafting roller after the first mixed fiber strip after the first mixed cotton is formed; The second drawing, which is to adopt even numbers of regenerated polyester cotton mixed strips to feed together, wherein the total number of the fed regenerated polyester cotton mixed strips is between 6 and 8, the fed regenerated polyester cotton mixed strips are divided into two groups in the second drawing, the number of the regenerated polyester in each group is consistent, and the regenerated polyester cotton mixed semi-finished strips are obtained by feeding the fibers into a feeding system, a drafting system and a winding system of a second drawing device from back to front along the movement direction of the fibers in the second drawing; The second drawing device comprises a feeding system, a drafting system and a winding system, wherein the feeding system comprises an upper press roller pair and a lower press roller pair, the upper press roller pair and the lower press roller pair of the feeding system for the second drawing are identical to the upper press roller pair and the lower press roller pair of the feeding system for the first drawing, an upper rear gathering horn mouth is arranged at the rear side of the upper press roller pair, a lower rear gathering horn mouth is arranged at the rear side of the lower press roller pair, and the upper rear gathering horn mouth and the lower rear gathering horn mouth of the second drawing are identical to the upper rear gathering horn mouth and the lower rear gathering horn mouth of the first drawing; The drafting system comprises a rear drafting roller pair, a middle drafting roller pair and a front drafting roller pair, wherein the rear drafting roller pair comprises a rear lower roller and a rear upper rubber roller, the middle drafting roller pair comprises a front lower roller and a front upper rubber roller, the rear upper rubber roller, the upper rubber roller and the front upper rubber roller are arranged on a pressurizing assembly, the pressurizing assembly is spring-pressurized, when the pressurizing assembly is pressed down, the rear lower roller and the rear upper rubber roller, the middle lower roller and the upper rubber roller and the front lower roller are respectively pressed and contacted, when the pressurizing assembly is lifted up, certain space is respectively kept between the rear lower roller and the rear upper rubber roller, between the middle lower roller and the upper rubber roller and between the front lower roller and the front upper rubber roller, a front gathering bell mouth is arranged at the front part of the drafting system, the front gathering bell mouth of a second drawing is completely identical with the front gathering bell mouth of a first drawing, and a loop system of the second drawing is completely identical with the loop system of the first drawing; The first group and the second group of regenerated polyester cotton mixed strips are respectively fed into a drafting system through an upper and a lower rear gathering horn mouth, the first group and the second group of regenerated polyester cotton mixed strips gradually change from the cylindrical shape of the space into the horizontal plane shape in the feeding process, the gradual combination is realized in the changing process, the first group and the second group of regenerated polyester cotton mixed strips after combination are jointly fed through a rear drafting roller pair of the drafting system, the first group and the second group of the regenerated polyester cotton mixed strips which are relatively tight are fed into the drafting system in an upper and lower overlapped state in the pressing process, gaps are generated between fibers in the first group and the second group of the regenerated polyester cotton mixed strips due to the drafting effect in the drafting system, the fibers between the first group and the second group of the regenerated polyester cotton mixed strips are mutually and randomly permeated under the pressing effect of the drafting system, the regenerated polyester cotton mixed semi-cooked strips in an approximate plane state are obtained, the regenerated polyester cotton mixed semi-cooked strips are gradually changed from the plane state into the cylindrical structure of the space after passing through the front gathering horn mouth and are output after being gradually changed, and the regenerated polyester mixed semi-cooked strips after being coiled in the coiling drum; the third drawing step, namely, 4-6 regenerated polyester cotton mixed semi-finished strips are fed together, and fed into a feeding system, a drafting system and a winding system of a third drawing device from back to front along the movement direction of the fibers in the third drawing step to obtain the regenerated polyester cotton finished strips; The third drawing device comprises a feeding system, a drafting system and a winding system, wherein the feeding system comprises a rear gathering horn mouth, the rear gathering horn mouth of the third drawing is identical to the upper rear gathering horn mouth and the lower rear gathering horn mouth of the second drawing, the drafting system of the third drawing is identical to the drafting system of the second drawing, the front gathering horn mouth is arranged at the front part of the drafting system, the front gathering horn mouth of the third drawing is identical to the front gathering horn mouth of the second drawing, the winding system of the third drawing is identical to the winding system of the second drawing, and when in use, the rear lower roller, the rear upper rubber roller, the middle lower roller, the middle upper rubber roller, the front lower roller and the front upper rubber roller of the drafting system are all in a state of stopping rotation and keeping a certain distance, 4-6 regenerated polyester cotton mixed semi-cooked strips pass through a rear gathering horn mouth, a position between a rear lower roller and a rear upper rubber roller of a drafting system, a position between a middle lower roller and an upper rubber roller of the drafting system, a position between a front lower roller and a front upper rubber roller of the drafting system and a front gathering horn mouth in sequence, so that initialization is finished, the rear lower roller and the rear upper rubber roller of the drafting system, the middle lower roller and the upper rubber roller of the drafting system, the front lower roller and the front upper rubber roller are kept in a rotating and mutually pressing state, in the process, 4-6 regenerated polyester cotton mixed semi-cooked strips are arranged in parallel along the width direction of the mixed strips and then enter the rear gathering horn mouth, the fed regenerated polyester cotton mixed semi-cooked strips are raised to the vertical direction along with the reduction of caliber of the gathering horn mouth, and raised parts are pressed again along with the increase of eccentricity, the method comprises the steps that 4-6 regenerated polyester cotton mixed semi-finished strips are fed into a drafting system in a compact mode, friction acting force is generated between fibers in the regenerated polyester cotton mixed semi-finished strips under mutual contact due to a compact structure in the drafting system, the regenerated polyester cotton finished strips with more uniform linear density distribution are obtained, the regenerated polyester cotton finished strips are gradually reconverted into a cylindrical structure in space from a planar state after being gathered into a horn mouth before being output, and the output regenerated polyester cotton finished strips are wound in a barrel after being driven by a winding disc; (3) And (3) yarn forming, namely sequentially carrying out roving, spinning and spooling procedures on the regenerated polyester cotton sliver obtained in the step (2) to obtain the regenerated polyester and cotton blended yarn.
  2. 2. The method according to claim 1, wherein the raw materials used in the blowing and carding process of the regenerated polyester fiber in the step (1) comprise 96.19% of regenerated polyester fiber with a specification of 1.4d x 38mm, 1.27% of ECO/C air-absorbing flower, 1.27% of ECO/C mixing bar and 1.27% of ECO/C coarse yarn head.
  3. 3. The method of producing a recycled polyester and cotton blend yarn according to claim 1, wherein the raw materials used in the blowing process of the cotton fiber in step (1) include 11.11% grade 328, 9.1% moisture regain, 4.69 axsu-cotton, 11.11% grade 328, 8% moisture regain, 4.56 axsu-cotton, 11.11% grade 328, 8.8% moisture regain, 4.72 black Su Mian, 11.11% grade 328, 8.8% moisture regain, 4.79 axsu-cotton, 11.11% grade 328, 8.3% moisture regain, 4.94 axsu-cotton, 11.11% grade 328, 9.3% moisture regain, 4.85 Kuitun cotton, 11.11% grade 328, 8.4% moisture regain, 3.91 axsu-cotton, 11.11% grade 328, 8.9% moisture regain, 4.71% axsu-cotton, and 2.68% moisture regain-cotton.
  4. 4. The method for producing a recycled polyester and cotton blended yarn according to claim 1, wherein the opening of the recycled polyester fiber in the step (1) is a grip-hit opening, and the opening of the cotton fiber is a free-hit opening and a grip-hit opening.
  5. 5. The method for producing the regenerated polyester and cotton blended yarn according to claim 1, wherein the preparation of the cotton pre-drawing is characterized in that 8 cotton raw strips are arranged in parallel along the thickness direction of the strips and then fed together, the 8 cotton raw strips fed together are combined through a horn mouth and then enter a drafting system for drafting, the drafting multiple is set between 8.05 and 8.3, and the corresponding cotton pre-drawing is obtained after the drafting through bundling by a bundling machine; The preparation of the regenerated terylene pre-drawing comprises the steps of adopting 6 regenerated terylene raw strips to be arranged in parallel along the thickness direction of the strips and then commonly fed, enabling the commonly fed 6 regenerated terylene raw strips to enter a drawing system for drawing after being combined through a horn mouth, wherein the drawing multiple is set between 5.8 and 6.0, and obtaining the corresponding regenerated terylene pre-drawing after drawing through bundling by a bundling device, wherein the drawing system adopts a mode of attaching three upper pressure bars, three lower pressure bars to a leather roller, the lower roller is made of special steel materials, an advanced heat treatment process is adopted, and high-precision needle bearings are adopted for upper roller bearings and lower roller bearings.

Description

Production method of regenerated polyester and cotton blended yarn Technical Field The invention relates to the field of novel yarns, in particular to a production method of a regenerated polyester and cotton blended yarn. Background The textile is a large textile country, and along with the rapid development of textile industry, the application field of textiles is continuously expanded, and the demand for various fibers is gradually increased. The yield and the demand of the chemical fibers are the largest in various fibers, and in 2019, the chemical fibers in China account for about 84% of the total processing amount of the textile fibers. In recent years, the economic development of China is rapid, and the problems of resource shortage and environmental deterioration become the bottleneck for restricting the economic development of China. The yield and the dosage of the polyester fiber are the top of the chemical fiber used in the textile industry in China, but the polyester fiber has poor degradability, and a large amount of waste polyester materials bring a heavy burden to the environment. Meanwhile, due to the shortage of resources in China, the development of the terylene industry serving as the petrochemical downstream industry is also limited to a certain extent. If waste silk of spinning workshops, leftovers of textile and clothing enterprises and some waste polyester materials are recycled, products with certain use value are manufactured, so that the problems of treatment of the waste polyester materials, the waste silk and the leftovers can be solved, the harm to the environment is reduced, and meanwhile, energy resources can be saved, the cost budget of the enterprises is reduced, and the open source throttling is realized. To solve the bottleneck problem of the current textile industry development, the problem must be solved from the source. The occurrence of the regenerated polyester well solves the contradiction problem of shortage of resources and increasingly prominent environmental pollution in China. The polyester fiber is prepared by taking waste polyester materials as raw materials through a certain physical and chemical means and combining a spinning method, and has performance similar to that of the traditional polyester fiber. However, compared with the traditional polyester, the regenerated polyester has slightly reduced melting point, more reduced glass transition temperature, and has larger defects of strength and tensile fracture performance compared with the traditional polyester, but has good alkali resistance. In view of the difference between regenerated terylene and traditional terylene, new requirements are provided for the production process of the regenerated terylene and cotton blended yarn. Disclosure of Invention The invention aims to provide a production method of a regenerated polyester and cotton blended yarn, which aims to solve the problems in the prior art. The invention provides a production method of a regenerated polyester and cotton blended yarn, which comprises the following steps: (1) Blowing and carding, namely respectively preparing regenerated polyester raw strips and cotton raw strips from the selected regenerated polyester fibers and cotton fibers through respective blowing and carding procedures; for the regenerated polyester fiber, sequentially carrying out disc cotton grabbing, a metal spark two-in-one detector, multi-bin cotton mixing, cotton opening and cotton carding on the selected regenerated polyester fiber to prepare regenerated polyester raw strips; For cotton fibers, sequentially passing the selected mixed cotton fibers through a disc plucker, a metal Mars two-in-one detector, an airflow separator, a heavy object separator, a single-shaft cotton opening machine, a multi-bin mixed cotton, a porcupine cotton opening machine, a cotton spinning foreign fiber remover and a cotton carding machine to prepare cotton raw strips; (2) Mixing, namely pre-drawing the regenerated polyester raw sliver obtained in the step (1) to obtain regenerated polyester pre-drawing and pre-drawing the cotton raw sliver to obtain cotton pre-drawing, and drawing the regenerated polyester pre-drawing and the cotton pre-drawing together for three times to obtain regenerated polyester cotton ripe sliver; The preparation of cotton pre-drawing, namely, 8 cotton raw strips are arranged in parallel along the thickness direction of a sliver and then are fed together, the 8 cotton raw strips fed together are combined through a horn mouth and then enter a drawing system for drawing, the drawing multiple is set between 8.05 and 8.3, and the corresponding cotton pre-drawing is obtained after drawing and bundling by a bundling machine; The preparation of regenerated terylene pre-drawing, namely 6 regenerated terylene raw strips are arranged in parallel along the thickness direction of a strip and then are fed together, the 6 regenerated terylene raw strips fed together are combin