CN110067057B - Production method of environment-friendly blended yarn - Google Patents
Production method of environment-friendly blended yarn Download PDFInfo
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- CN110067057B CN110067057B CN201910322789.5A CN201910322789A CN110067057B CN 110067057 B CN110067057 B CN 110067057B CN 201910322789 A CN201910322789 A CN 201910322789A CN 110067057 B CN110067057 B CN 110067057B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G13/00—Mixing, e.g. blending, fibres; Mixing non-fibrous materials with fibres
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G21/00—Combinations of machines, apparatus, or processes, e.g. for continuous processing
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/01—Natural vegetable fibres
- D10B2201/02—Cotton
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
Abstract
The invention discloses a production method of environment-friendly blended yarn, which adopts regenerated polyester fiber processed by waste polyester materials to prepare regenerated polyester strips after blowing-carding-drawing and pre-drawing, prepares cotton slivers after blowing-carding-drawing cotton fibers, mixes the regenerated polyester strips and the cotton slivers after three times of drawing to prepare mixed strips, and adopts four-row roller drawing in the second drawing, wherein a middle back roller and a middle front roller adopt roller covers which can transversely and circularly move left and right along a roller shaft, the axial rotation of the roller covers of the middle back roller and the middle front roller realizes the drawing and the fine drawing of the fed slivers, the transverse circulating movement of the roller covers of the middle back roller and the middle front roller realizes the untwisted transfer mixing of two fibers in the fed slivers, thereby improving the mixing effect of the regenerated polyester fiber and the cotton fiber in the drawing, and then passes through roving, drawing, pre-drawing and pre-drawing the mixed strips, And spinning to obtain the finally required environment-friendly blended yarn.
Description
Technical Field
The invention belongs to the technical field of spinning, and relates to a spinning method of a novel functional fabric, in particular to a production method of an environment-friendly blended yarn.
Background
With the development of social economy, the living standard of people is continuously improved, and for textiles for clothes, in addition to the pursuit of wearing comfort, the fashionability and functionality of the textiles for clothes are also paid more and more attention, and the pursuit of unique style and various functions such as antibacterial and antistatic functions are pursued. To meet this demand of consumers, new yarns and fabrics are continuously being developed as an important task in the textile industry. With the development of science and technology, the textile market competition is more and more intense, and each manufacturer continuously develops towards high-grade, good technical content and high added value in order to pursue the maximization of profit.
The invention provides a production method of environment-friendly blended yarn, which comprises the steps of preparing regenerated polyester strips by blowing-carding and pre-drawing regenerated polyester fibers processed from waste polyester materials, preparing cotton slivers by blowing-carding and pre-drawing cotton fibers, mixing the regenerated polyester strips and the cotton slivers by three drawing processes to prepare mixed strips, drafting by four rows of rollers in the second drawing process, wherein a middle rear roller and a middle front roller adopt roller covers which can transversely and circularly move left and right along a roller shaft, the drafting and thinning of fed slivers, the transverse circulating movement of the roller covers of the middle rear roller and the middle front roller are realized by the axial rotation of the roller covers of the middle rear roller and the middle front roller, the untwisted transfer mixing of two fibers in the fed slivers is realized, so that the mixing effect of the regenerated polyester fibers and the cotton fibers in the drawing process is improved, and then the mixed strips are subjected to roving, And spinning to obtain the finally required environment-friendly blended yarn.
Disclosure of Invention
The technical problem to be solved is as follows: in order to overcome the defects of the prior art, the invention adopts regenerated polyester fibers processed by waste polyester materials to prepare regenerated polyester strips after blowing-carding-drawing and pre-drawing, cotton slivers are prepared after cotton fibers are subjected to blowing-carding-drawing, longitudinal drafting, stretching and mixing and transverse non-twist transfer mixing are realized in the second drawing, thus improving the mixing effect of the regenerated polyester fibers and the cotton fibers in the drawing, and then the mixed slivers are subjected to roving and spinning to prepare the finally required environment-friendly blended yarns.
The technical scheme is as follows: the production method of the environment-friendly blended yarn comprises the steps of carrying out blowing-carding-drawing and pre-drawing on regenerated polyester fibers processed from waste polyester materials to obtain regenerated polyester strips, carrying out blowing-carding-drawing on cotton fibers to obtain cotton slivers, mixing the regenerated polyester strips and the cotton slivers through three-pass drawing to obtain mixed slivers, drafting the second drawing by adopting four rows of rollers, wherein a middle rear roller and a middle front roller adopt roller sleeves which can transversely move left and right circularly along a roller shaft, fine mixing of the regenerated polyester fibers and the cotton fibers in the slivers in the parallel non-transfer process in the process of drafting and thinning of the fed slivers is realized through the axial rotation of the roller sleeves of the middle rear roller and the middle front roller, and non-twisting transverse transfer mixing of the regenerated polyester fibers and the cotton fibers in the slivers is realized through the transverse circulating movement of the roller sleeves of the middle rear roller and the middle front roller, so that the mixing effect of the regenerated polyester fibers and the cotton fibers in the drawing is improved, and then, preparing the finally required environment-friendly blended yarn by roving and spun yarn from the mixed sliver, wherein the method comprises the following steps:
the first step is as follows: cotton blending: the method comprises the following steps of selecting 1.4D 38 mm-sized regenerated polyester, wherein the rate of ultra-long fibers of a regenerated polyester raw material is less than 0.5%, the content of double-length fibers is less than 0.6mg/100g, the content of defects such as doubling, thick yarn and the like is less than 2mg/g, performing blowing, heating and shaping, carding, reinforcing and carding and spinning on the regenerated polyester slivers, and improving the quality problems of loose and rotting cotton rolls, poor sliver forming, wrinkling and distortion of drawn mixed slivers, wrinkling and unevenness of finished cloth and the like in production caused by too large dry heat shrinkage rate and crimp number of the regenerated polyester, and mixing 96.86% of regenerated polyester fibers produced in Hangzhou and 3.14% of T/C mixed slivers as raw materials during production; for the arrangement of cotton bales, a disc type plucker is selected for cotton and regenerated terylene, a disc is equally divided into 9 parts, for cotton fibers, 9 cotton bales of different batches are adopted, and 1 cotton bale is placed in each part; for the regenerated polyester fiber, 8 regenerated polyester fiber bales from Hangzhou and 1T/C mixed bale from production enterprises
The second step is that: cotton blowing-carding unit and regenerated polyester blowing-carding unit: the selected cotton fiber is sequentially grabbed by a parallel cotton grabbing machine according to a mixing proportion, a metal spark detector is used for removing and separating metal block impurities in the grabbed cotton fiber, an empower impurity extractor is used for removing and separating small block impurities and flexible impurities in the grabbed cotton fiber, an A036 cotton opener is used for realizing free striking, opening and impurity removal of the cotton fiber before mixing, a multi-bin cotton mixing machine is used for realizing full and uniform mixing of various cotton fibers after mixing, an FA106 cotton opener is used for realizing free striking, opening and impurity removal of the cotton fiber after mixing, a YQ600 cotton spinning foreign fiber cleaner is used for separating and removing other abnormal fibers in the cotton fiber, an FA224B high-yield cotton carding machine is used for realizing needle punching, air flow impurity removal and uniform sliver formation of the cotton fiber so as to prepare cotton slivers, in the cotton opening process, the separation distance between a beater and a dust rod is gradually increased along with the loosening of the fiber, and the separation distance between the beater and the dust rod is gradually increased from an inlet to an outlet, for the distance between the dust bars, the distance between the inlet part and the dust bars is larger, so that large impurities fall off first and air flow is supplemented, the middle part is properly reduced, and the outlet part is required to be recycled less, so that the distance between the inlet part and the outlet part is gradually reduced; for the blowing-carding unit of the regenerated terylene, aiming at the requirements of good uniformity and blended yarn of the regenerated terylene fiber, simultaneously reducing the distance of a beater blade of a plucker from a rib, adjusting the rotation speed of a cotton grabbing trolley, improving the running efficiency of the trolley, ensuring uniform grabbing and uniform mixing, reducing the relative beater speed of the blowing-carding unit, properly amplifying the spacing between a cylinder and a cover plate, reducing the friction and rubbing between fibers, properly lifting a cotton feeding plate, increasing the length of a carding process to improve the carding effect of the fibers, grabbing the selected terylene fibers by an A0020 disc type plucker in sequence according to the mixing proportion, removing and separating metal block impurities in the grabbed terylene fibers by a metal spark detector, removing and separating small block impurities and flexible impurities in the grabbed terylene fibers by a DIVERTER Amplifier impurity remover, and fully and uniformly mixing various terylene fibers by a multi-bin cotton mixing machine, A036B cotton opener realizes free beating, opening and impurity removal of the mixed polyester fibers, and FA201B cotton carding machine realizes needle carding, airflow impurity removal and uniform slivering of the polyester fibers, so that regenerated polyester slivers are prepared;
the third step: pre-drawing regenerated polyester strips: the regenerated polyester strips are subjected to one-time pre-drawing before being mixed with cotton, so that the weight unevenness of the regenerated polyester strips is reduced, the quantification is controlled, and the correct mixing ratio of the regenerated polyester and the cotton is ensured; the straightening degree and the parallelism of fibers in the regenerated terylene are adapted to cotton, and the tension difference between the regenerated terylene and the cotton is reduced to the minimum degree on a later mixing machine, thereby being beneficial to the evenness of mixed slivers; in the pre-drawing of the regenerated polyester strips, 6 regenerated polyester strips prepared in the second step are fed together, and are drawn and attenuated by a drawing system and then recombined to prepare the required regenerated polyester pre-drawing, the drawing system adopts a three-roller double-zone drawing structure, and in the pre-drawing process, because the fed regenerated polyester strips have more front hook fibers, are disorderly arranged and have poor parallel straightness, the rear zone drawing multiple is selected to be 1.7-1.9 times, and the front zone main drawing multiple is 3.531 times, so that the front hook in the regenerated polyester strips is straightened;
the fourth step: mixing and drawing: three-roller double-zone drafting structure is adopted in the drawing system, since the regenerated terylene is already subjected to one-pass drawing, the number of back bent hooks in the regenerated terylene pre-drawing is more and the number of front bent hooks in the cotton sliver is more, when the number of the fed regenerated terylene pre-drawing is more than the number of the cotton slivers, selecting the back zone drafting to be 1.74 times and the front zone main drafting to be 4.928 times so as to mainly realize the straightening of a back hook in the regenerated polyester sliver, and selecting the back zone drafting to be 1.74 times and the front zone main drafting to be 4.72 times when the number of the fed slivers is larger than the number of the fed regenerated polyester pre-drawing so as to mainly realize the straightening of front hook fibers in the slivers;
in the second drawing, 6 first regenerated terylene/cotton mixed strips are fed together, the fed first regenerated terylene/cotton mixed strips are drawn to be fine by a drawing system and then recombined to prepare second regenerated terylene/cotton mixed strips, the drawing system adopts a four-roller three-zone drawing structure, four rollers of the drawing system sequentially comprise a front roller, a middle rear roller and a rear roller from front to back, wherein the front roller, the middle rear roller and the rear roller comprise roller shafts, the roller shafts are of solid cylindrical structures, roller sleeves are sleeved on the roller shafts, the roller sleeves of the front rollers are integrally and fixedly connected with the roller shafts, the roller sleeves of the rear rollers are integrally and fixedly connected with the roller shafts, the roller sleeves of the middle front roller and the middle rear roller are transversely connected with the roller shafts in a sliding manner, first grooves with equal radian spacing are formed along the length directions of the roller shafts on the outer circumferences of the middle front roller and the middle rear roller, and the roller shafts are provided with equal radian spacing, The structure of the first groove, the second groove and the third groove is the same, the first groove, the second groove and the third groove comprise an upper groove and a lower groove, the width of the upper groove is larger than that of the lower groove, the first convex groove, the second convex groove and the third convex groove are arranged at equal radian intervals along the inner circumference of the roller sleeves of the middle front roller and the middle rear roller, lower rollers are arranged at the bottoms of the first convex groove, the second convex groove and the third convex groove, the lower rollers of the first convex groove, the second convex groove and the third convex groove are driven to rotate by the same motor, the rotating direction is adjusted by the motor, the lower rollers of the first convex groove, the second convex groove and the third convex groove of the roller sleeves of the front roller and the middle rear roller are respectively embedded into the lower grooves of the first groove, the second convex groove and the third convex groove, and the first convex groove, the second convex groove and the third convex groove of the roller sleeves of the front roller and the middle rear roller are respectively embedded into the first groove, In the upper grooves of the second groove and the third groove, the inner circumferences of the roller covers of the front roller and the middle and rear rollers are clung to the outer circumferences of the roller shafts of the front roller and the middle and rear rollers at the moment, the jointly fed 6 first regenerated terylene/cotton mixed strips firstly enter a rear drawing area between the rear roller and the middle and rear rollers of the drawing system for the second drawing, the first drawing and fine-drawing process of the fed 6 first regenerated terylene/cotton mixed strips is realized under the rotation of the roller cover of the rear roller and the roller cover of the middle and rear rollers along the axial direction at different speeds, then the 6 first regenerated terylene/cotton mixed strips which are drawn and fine through the first drawing of the rear drawing area enter a middle drawing area between the middle and rear rollers, and the second drawing and fine-drawing process of the 6 first regenerated terylene/cotton mixed strips is realized under the rotation of the roller cover of the middle and rear roller and the roller cover of the middle and front rollers along the axial direction at different speeds at the moment, on the other hand, the lower rollers of the first convex groove, the second convex groove and the third convex groove of the roller cover of the middle and rear rollers are driven by the motor to rotate, so that the roller cover of the middle and rear rollers slides from left to right or from right to left along the roller shaft of the middle and rear rollers, when the roller cover of the middle and rear rollers slides to the right side or the left side edge of the roller shaft of the middle and rear rollers, the roller cover of the middle and rear rollers keeps the same speed as the original roller cover and continues to slide from right to left or from left to right along the roller shaft of the middle and rear rollers of the middle and front rollers, and the lower rollers of the first convex groove, the second convex groove and the third convex groove of the roller cover of the middle and front rollers are driven by the motor to rotate, so that the roller cover of the middle and front rollers slides from right to left or from right along the roller shaft of the middle and front rollers, when the roller cover of the middle and front rollers slides to the left side edge or the right edge of the roller shaft of the middle and front rollers, the original roller cover of the middle and front rollers keeps the same speed as the original roller cover and continues to slide from left along the roller shaft of the middle and front rollers The first regenerated terylene/cotton mixed strip is moved or slides from right to left, the sliding directions of the roller sleeve of the middle and rear rollers and the roller sleeve of the middle and front rollers are kept opposite, the sliding speed is kept the same, in the sliding process of the roller sleeve of the middle and rear rollers along the roller shaft of the middle and rear rollers and the roller sleeve of the middle and front rollers along the roller shaft of the middle and front rollers, the fibers in the first regenerated terylene/cotton mixed strip realize the staggered transfer process under the driving of the roller sleeve of the middle and rear rollers and the roller sleeve of the middle and front rollers, so that the transfer mixing action of the regenerated terylene fibers and the cotton fibers in the first regenerated terylene/cotton mixed strip is realized, then the first regenerated terylene/cotton mixed strip which is subjected to secondary drafting, refining and transfer and mixing in the middle drafting zone enters the front drafting zone between the middle and front rollers, and at the moment, the first regenerated terylene/cotton mixed strip which is fed under the rotation of the roller sleeve of the middle and front rollers along the axial different speeds is realized The third drafting and thinning process, and finally re-combining the 6 first regenerated polyester/cotton mixed strips subjected to the third drafting and thinning and the first transferring and mixing, so that the refined mixing of the regenerated polyester fibers and the cotton fibers in the first regenerated polyester/cotton mixed strips after the drafting and thinning is realized;
in the third drawing, 6 second regenerated polyester/cotton mixed strips are fed together, the fed regenerated polyester pre-drawing strips and cotton slivers are drafted and attenuated by a drafting system and then recombined to prepare regenerated polyester/cotton mixed drawn strips, so that the fed second regenerated polyester/cotton mixed strips are finely mixed in a parallel non-transfer state of regenerated polyester fibers and cotton fibers in the drafting and attenuation process, the drafting system adopts a four-roller three-zone drafting structure, and adopts four upper, four lower guide rollers and pressure rod type double-zone curve drafting;
the fifth step: roving: feeding the 1 regenerated terylene/cotton mixed sliver prepared in the fourth step to prepare regenerated terylene/cotton mixed roving, wherein the roving process comprises two steps of drafting and twisting and winding, the prepared terylene/cotton mixed roving is adaptive to the drafting capability of a spinning frame through drafting, the parallel straightness and the separation degree of fibers are further improved, the terylene/cotton mixed roving has certain strength through twisting, and is finally formed into a proper package to adapt to the feeding of the spinning frame through winding, the drafting adopts a four-roller double-short apron drafting mode, the drafting multiple is controlled to be below 10 times, a middle drafting area is a main drafting area, a front drafting area is a tension drafting arrangement area between 1.01 and 1.07 times, the orderly arrangement of the fibers in a bundling area is ensured, and a rear drafting area is a tension drafting arrangement area with the multiple drafting between 1.06 and 1.53 times;
and a sixth step: spinning: feeding the 1 regenerated terylene/cotton mixed rough yarn prepared in the fifth step into the environment-friendly blended yarn, wherein the yarn spinning process comprises two steps of drafting and twisting and winding, the fed roving is drawn to be thin to the required fineness by drafting, the spun yarn has certain strength, elasticity and luster by twisting, and finally the spun yarn is wound to form a certain tubular structure, so that the subsequent process is convenient to process, the drafting adopts a three-roller double-short apron drafting mode, the main function of a rear drafting area is to prepare for the main drafting of a front drafting area, so as to give full play to the function of the rubber ring for controlling the fiber movement, the drafting range of the rear zone is controlled between 1.14 and 1.5 times, the drafting multiple of the rear drafting zone is mastered slightly less, the purposes of improving the drafting multiple of the front zone and ensuring the yarn quality are achieved, meanwhile, in order to ensure smooth drafting and prevent the slivers from slipping at the jaw of the roller, the roller gauge of the back drafting zone and the roller pressurization are increased.
Preferably, in the second step, for the cotton blowing-carding unit, the technological principle of 'taking by multiple bags, finely grabbing cotton, fully mixing, gradually opening, replacing beating by carding and less damaging fibers' is adopted.
Preferably, in the second step, the cotton fiber parallel bale plucker is FA 002.
Preferably, in the second step, the metal spark detector is AMP-2000V 5.
Preferably, in the second step, the diesel trap is used.
Preferably, in the second step, a multi-bin cotton mixer for cotton fiber mixing is used as FA 025.
Preferably, in the second step, the scutching adopts the process principle of 'shorter flow, less frequent grabbing, reinforced mixing, light beating and less falling'.
Preferably, in the second step, the cotton carding part adopts the process principle of low speed, less dropping and fast transferring.
Preferably, in the second step, a multi-bin cotton mixer for mixing the polyester fibers adopts KINGDAMA-6.
Preferably, in the third step, in the pre-drawing process of the regenerated polyester strips, the process adopts the principles of 'heavy pressurization, large spacing, smooth and clean channel, winding prevention and blocking prevention'.
Has the advantages that: the method of the invention adopts the regenerated polyester fiber processed by waste polyester material to prepare regenerated polyester sliver after blowing-carding-drawing and pre-drawing, and cotton sliver is prepared by cotton fiber after blowing-carding-drawing, and the regenerated polyester fiber and the cotton fiber realize longitudinal drafting, stretching and mixing and transverse untwisted transfer mixing in the second drawing, thereby improving the mixing effect of the regenerated polyester fiber and the cotton fiber in the drawing, and then the mixed sliver is subjected to roving and spun yarn to prepare the finally required environment-friendly blended yarn.
Detailed Description
The following examples further illustrate the present invention but are not to be construed as limiting the invention. Modifications and substitutions to methods, procedures, or conditions of the invention may be made without departing from the spirit and substance of the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.
Example 1
To prepare a linear density of 32SAnd the blended yarn with the blending ratio of T65/C35 is taken as an example, and the corresponding process parameters are as follows:
1 selecting and matching raw materials
Raw cotton matching meter
Regenerated polyester cotton blending meter
2 the process flow is designed as follows
(1) Cotton: blowing-carding unit
(2) Regenerating terylene: blowing-carding → pre-drawing
(1)+(2): drawing at the first pass → drawing at the second pass → drawing at the third pass → roving → spun yarn → winding
(1) Cotton: FA002 parallel cotton plucker → AMP-2000V5 metal Mars detector → DIVERTER Amplifier → A036 opener → FA025 multi-chamber cotton mixing machine → FA106 opener → YQ600 cotton spinning foreign fiber cleaner → FA224B high-yield cotton carding machine
(2) Regenerating terylene: a0020 disc type plucker → 2000V5 metal Mars detector → DIVERTER Ampere trash extractor → KINGDA MA-6 multi-bin cotton blender → A036B opener → FA201B cotton carding machine → FA306A drawing frame
(1)+(2): FA306 drawing frame → FA311F high-speed drawing frame → FA311F high-speed drawing frame → TJFA458A roving frame → Zinser360 spinning frame → Savio winder
(3) Design of key process parameters
Opening and picking cotton:
technological parameter table of plucker
Technological parameter table for cotton opener
Technological parameter table of cotton mixer
Blowing and carding the regenerated polyester:
technological parameter table of plucker
Technological parameter table for cotton opener
Technological parameter meter for carding machine
Pre-drawing regenerated polyester:
parameter table for pre-drawing process
Drawing:
first drawing process parameter table
Parameter table for two-pass drawing process
Three-drawing process parameter table
Roving:
roving process parameter table
Spinning:
spun yarn process parameter table
Spooling:
winding process parameter table
Claims (10)
1. The production method of the environment-friendly blended yarn is characterized in that regenerated polyester fibers processed from waste polyester materials are subjected to blowing-carding-drawing and pre-drawing to prepare regenerated polyester strips, cotton fibers are subjected to blowing-carding-drawing to prepare cotton slivers, the regenerated polyester strips and the cotton slivers are subjected to three-pass drawing and mixing to prepare mixed strips, four rows of rollers are adopted for drafting in the second pass of drawing, roller sleeves capable of transversely and circularly moving left and right along a roller axis are adopted for a middle rear roller and a middle front roller, refined mixing of the regenerated polyester fibers and the cotton fibers in the slivers in the process of drafting and fine-drawing of the fed slivers is realized through axial rotation of the roller sleeves of the middle rear roller and the middle front roller, and transverse circulating movement of the roller sleeves of the middle rear roller and the middle front roller realizes non-twist transverse transfer mixing of the regenerated polyester fibers and the cotton fibers in the fed slivers, therefore, the mixing effect of the regenerated polyester fiber and the cotton fiber in drawing is improved, and then the mixed sliver is subjected to roving and spinning to prepare the finally required environment-friendly blended yarn, and the method comprises the following steps:
the first step is as follows: cotton blending: the method comprises the steps of selecting 1.4D 37.6 mm-sized regenerated polyester, wherein the rate of ultra-long fibers of a regenerated polyester raw material is 0.2%, the content of double-length fibers is 3mg/100g, the defect content of doubling and roving is less than 2mg/g, performing blowing, opening and impurity removal, carding and carding reinforcement and carding on the regenerated polyester sliver in spinning, and improving the quality problems of loose and rotting cotton rolls, poor sliver forming, wrinkling and distortion of drawn mixed sliver and wrinkling and unevenness of finished cloth in production caused by too large dry heat shrinkage rate and crimp number of the regenerated polyester, and mixing 96.86% of the regenerated polyester fibers and 3.14% of T/C mixed sliver as raw materials in production; for the arrangement of cotton bales, a disc type plucker is selected for cotton and regenerated terylene, a disc is equally divided into 9 parts, for cotton fibers, 9 cotton bales of different batches are adopted, and 1 cotton bale is placed in each part; for the regenerated polyester fibers, 8 regenerated polyester fiber bags and 1T/C mixed strip bag are used;
the second step is that: cotton blowing-carding unit and regenerated polyester blowing-carding unit: the selected cotton fiber is sequentially grabbed by a parallel cotton grabbing machine according to a mixing proportion, a metal spark detector removes and separates metal block impurities in the grabbed cotton fiber, an empower impurity extractor removes and separates small block impurities and flexible impurities in the grabbed cotton fiber, an A036 cotton opener realizes free striking, opening and impurity removal of the cotton fiber before mixing, a multi-bin cotton mixing machine realizes full and uniform mixing of various cotton fibers after mixing, an FA106 cotton opener realizes free striking, opening and impurity removal of the cotton fiber after mixing, a YQ600 cotton spinning foreign fiber cleaner realizes separation and removal of other special-shaped fibers in the cotton fiber, an FA224B high-yield cotton carding machine realizes needle punching, air flow impurity removal and uniform sliver formation of the cotton fiber to prepare cotton slivers, in the cotton opening process, the spacing between a beater and a dust rod is gradually increased along with loosening of the fiber, and the spacing between the beater and the dust rod is gradually increased from an inlet to an outlet, for the distance between the dust bars, the distance between the inlet part and the dust bars is larger, so that large impurities fall off first and air flow is supplemented, the middle part is properly reduced, and the outlet part is required to be recycled less, so that the distance between the inlet part and the outlet part is gradually reduced; for the blowing-carding unit of the regenerated terylene, aiming at the requirements of good uniformity and blended yarn of the regenerated terylene fiber, simultaneously reducing the distance of a beater blade of a plucker from a rib, adjusting the rotation speed of a cotton grabbing trolley, improving the running efficiency of the trolley, ensuring uniform grabbing and uniform mixing, reducing the relative beater speed of the blowing-carding unit, properly amplifying the spacing between a cylinder and a cover plate, reducing the friction and rubbing between fibers, properly lifting a cotton feeding plate, increasing the length of a carding process to improve the carding effect of the fibers, grabbing the selected terylene fibers by an A002D disc type plucker in sequence according to the mixing proportion, removing and separating metal block impurities in the grabbed terylene fibers by a metal spark detector, removing and separating small block impurities and flexible impurities in the grabbed terylene fibers by a DIVERTER Amplifier impurity remover, realizing the full and uniform mixing of the blended terylene fibers by a multi-bin cotton mixer, A036B cotton opener realizes free beating, opening and impurity removal of the mixed polyester fibers, and FA201B cotton carding machine realizes needle carding, airflow impurity removal and uniform slivering of the polyester fibers, so that regenerated polyester slivers are prepared;
the third step: pre-drawing regenerated polyester strips: the regenerated polyester strips are subjected to one-time pre-drawing before being mixed with cotton, so that the weight unevenness of the regenerated polyester strips is reduced, the quantification is controlled, and the correct mixing ratio of the regenerated polyester and the cotton is ensured; the straightening degree and the parallelism of fibers in the regenerated terylene are adapted to cotton, and the tension difference between the regenerated terylene and the cotton is reduced to the minimum degree on a later mixing machine, thereby being beneficial to the evenness of mixed slivers; in the pre-drawing of the regenerated polyester strips, 6 regenerated polyester strips prepared in the second step are fed together, and are drawn and attenuated by a drawing system and then recombined to prepare the required regenerated polyester pre-drawing, the drawing system adopts a three-roller double-zone drawing structure, and in the pre-drawing process, because the fed regenerated polyester strips have more front hook fibers, are disorderly arranged and have poor parallel straightness, the rear zone drawing multiple is selected to be 1.7-1.9 times, and the front zone main drawing multiple is 3.531 times, so that the front hook in the regenerated polyester strips is straightened;
the fourth step: mixing and drawing: three-roller double-zone drafting structure is adopted in the drawing system, since the regenerated terylene is already subjected to one-pass drawing, the number of back bent hooks in the regenerated terylene pre-drawing is more and the number of front bent hooks in the cotton sliver is more, when the number of the fed regenerated terylene pre-drawing is more than the number of the cotton slivers, selecting the back zone drafting to be 1.74 times and the front zone main drafting to be 4.928 times so as to mainly realize the straightening of a back hook in the regenerated polyester sliver, and selecting the back zone drafting to be 1.74 times and the front zone main drafting to be 4.72 times when the number of the fed slivers is larger than the number of the fed regenerated polyester pre-drawing so as to mainly realize the straightening of front hook fibers in the slivers;
in the second drawing, 6 first regenerated terylene/cotton mixed strips are fed together, the fed first regenerated terylene/cotton mixed strips are drawn to be fine by a drawing system and then recombined to prepare second regenerated terylene/cotton mixed strips, the drawing system adopts a four-roller three-zone drawing structure, four rollers of the drawing system sequentially comprise a front roller, a middle rear roller and a rear roller from front to back, wherein the front roller, the middle rear roller and the rear roller comprise roller shafts, the roller shafts are of solid cylindrical structures, roller sleeves are sleeved on the roller shafts, the roller sleeves of the front rollers are integrally and fixedly connected with the roller shafts, the roller sleeves of the rear rollers are integrally and fixedly connected with the roller shafts, the roller sleeves of the middle front roller and the middle rear roller are transversely connected with the roller shafts in a sliding manner, first grooves with equal radian spacing are formed along the length directions of the roller shafts on the outer circumferences of the middle front roller and the middle rear roller, and the roller shafts are provided with equal radian spacing, The structure of the first groove, the second groove and the third groove is the same, the first groove, the second groove and the third groove comprise an upper groove and a lower groove, the width of the upper groove is larger than that of the lower groove, the first convex groove, the second convex groove and the third convex groove are arranged at equal radian intervals along the inner circumference of the roller sleeves of the middle front roller and the middle rear roller, lower rollers are arranged at the bottoms of the first convex groove, the second convex groove and the third convex groove, the lower rollers of the first convex groove, the second convex groove and the third convex groove are driven to rotate by the same motor, the rotating direction is adjusted by the motor, the lower rollers of the first convex groove, the second convex groove and the third convex groove of the roller sleeves of the middle front roller and the middle rear roller are respectively embedded into the lower grooves of the first groove, the second convex groove and the third convex groove, and the first convex groove, the second convex groove and the third convex groove of the roller sleeves of the middle front roller and the middle rear roller are respectively embedded into the first groove, The inner circumferences of the roller sleeves of the middle front roller and the middle rear roller are clung to the outer circumferences of the roller shafts of the middle front roller and the middle rear roller at the moment, the jointly fed 6 first regenerated terylene/cotton mixed strips firstly enter a rear drawing area between the rear roller and the middle rear roller of the drawing system for the second drawing, the roller sleeve of the rear roller and the roller sleeve of the middle rear roller rotate at different axial speeds at the moment to realize the first drafting and thinning process of the fed 6 first regenerated terylene/cotton mixed strips, and then the 6 first regenerated terylene/cotton mixed strips subjected to the first drafting and thinning process in the rear drawing area enter a middle drawing area between the middle rear roller and the middle front roller at different axial speeds, on the one hand, the second drafting and thinning process of the fed 6 first regenerated terylene/cotton mixed strips is realized under the rotation of the roller sleeve of the middle rear roller and the roller sleeve of the middle front roller at different axial speeds at the moment On the other hand, when the roller sleeve of the middle and rear rollers slides to the right side or the left side edge of the roller shaft of the middle and rear rollers along the roller shaft of the middle and rear rollers, the roller sleeve of the middle and rear rollers keeps the same speed as the original speed and continues to slide from right to left or from left to right along the roller shaft of the middle and rear rollers, and the lower rollers of the first convex groove, the second convex groove and the third convex groove of the roller sleeve of the middle and front rollers are driven to rotate by the motor, so that the roller sleeve of the middle and front rollers slides from right to left or from left to right along the roller shaft of the middle and front rollers, and the roller sleeve of the middle and front rollers slides to the left side or the right side edge of the roller shaft of the middle and front rollers, the roller sleeve of the middle and front roller keeps the same speed as the original speed and continuously slides from left to right or from right to left along the roller shaft of the middle and front roller, the sliding directions of the roller sleeve of the middle and rear rollers and the roller sleeve of the middle and front roller are kept opposite, the sliding speed is kept the same, in the sliding process of the roller sleeve of the middle and rear rollers along the roller shaft of the middle and rear roller and the roller sleeve of the middle and front roller along the roller shaft of the middle and front roller, the fibers in the first regenerated terylene/cotton mixed strip are driven by the pressing of the roller sleeve of the middle and rear roller and the roller sleeve of the middle and front roller to realize the staggered transfer and mixing action of the regenerated terylene fibers and the cotton fibers in the first regenerated terylene/cotton mixed strip in the transfer process, and then the first regenerated terylene/cotton mixed strip which is subjected to the second drafting and fine drawing in the middle drafting zone and is transferred to enter the front drafting zone between the middle and front roller, at the moment, the third drafting and thinning process of the fed first regenerated polyester/cotton mixed strips is realized under the rotation of the roller sleeve of the middle and front roller and the roller sleeve of the front roller along different axial speeds, and finally, 6 first regenerated polyester/cotton mixed strips which are subjected to the third drafting and thinning and the primary transfer mixing are recombined again, so that the refined mixing of the regenerated polyester fibers and the cotton fibers in the first regenerated polyester/cotton mixed strips after the drafting and thinning is realized;
in the third drawing, 6 second regenerated polyester/cotton mixed strips are fed together, the fed regenerated polyester pre-drawing strips and cotton slivers are drafted and attenuated by a drafting system and then recombined to prepare regenerated polyester/cotton mixed drawn strips, so that the fed second regenerated polyester/cotton mixed strips are finely mixed in a parallel non-transfer state of regenerated polyester fibers and cotton fibers in the drafting and attenuation process, the drafting system adopts a four-roller three-zone drafting structure, and pressure rod type double-zone curve drafting with four upper rollers, four lower rollers and guide rollers is adopted;
the fifth step: roving: feeding the 1 regenerated terylene/cotton mixed sliver obtained in the fourth step into a roving frame to obtain a regenerated terylene/cotton mixed roving, wherein the roving process comprises two steps of drafting and twisting and winding, the prepared terylene/cotton mixed roving is adaptive to the drafting capability of a spinning frame through drafting, the parallel straightness and the separation degree of fibers are further improved, the terylene/cotton mixed roving has certain strength through twisting, and is finally formed into a proper package to adapt to the feeding of the spinning frame through winding, the drafting adopts a four-roller double-short apron drafting mode, the drafting multiple is controlled to be below 10 times, a middle drafting area is a main drafting area, a front drafting area is a tension drafting arrangement area between 1.01 and 1.07 times, the orderly arrangement of the fibers in a bundling area is ensured, and a rear drafting area is a tension drafting area with the drafting multiple between 1.06 and 1.53 times;
and a sixth step: spinning: feeding the 1 regenerated terylene/cotton mixed roving obtained in the fifth step into a spinning frame to obtain the environment-friendly blended yarn, wherein the spinning process comprises two steps of drafting and twisting and winding, the fed roving is drawn to be thin to the required fineness through drafting, the spun yarn has certain strength, elasticity and luster through twisting, and finally the spun yarn is made into a certain tubular structure through winding and forming, so that the processing of a subsequent process is facilitated, the drafting adopts a three-roller double-short leather ring drafting mode, the main function of a rear drafting zone is to prepare for main drafting of a front drafting zone so as to fully play the role of controlling fiber movement by a rubber ring, the drafting multiple range of the rear drafting zone is controlled between 1.14 and 1.5 times, the drafting multiple of the rear drafting zone is mastered slightly smaller, the purposes of improving the front zone multiple and ensuring the yarn quality are achieved, meanwhile, the drafting is smooth, and the slivers are prevented from slipping at a roller jaw, increasing the roller gauge and the roller pressure in the back drafting zone.
2. The method for producing environment-friendly blended yarn as claimed in claim 1, wherein in the second step, for the cotton blowing-carding combination, the technological principle of 'taking by multiple bags, fine cotton grabbing, full mixing, gradual opening, replacing beating with carding and less fiber damage' is adopted.
3. The process for producing an environmentally blended yarn of claim 1 wherein in the second step, the cotton fiber parallel bale plucker is FA 002.
4. The method of producing an environmentally blended yarn of claim 1 wherein in the second step, the metal spark detector is AMP-2000V 5.
5. The process for producing an environmentally friendly blended yarn of claim 1 wherein in the second step, a DIVERTER is used as a scrambler for cotton carding.
6. The method of producing an environmentally blended yarn of claim 1 wherein in the second step, a cotton fiber blend mule-bin blender is used with FA 025.
7. The method of producing an environmentally friendly blended yarn of claim 1 wherein in the second step, the scutching employs the process principles of "shorter flow, less frequent grabbing, enhanced mixing, light beating and less falling".
8. The method for producing environment-friendly blended yarn according to claim 1, wherein in the second step, the carding part adopts the process principle of low speed, less dropping and fast transferring.
9. The method of producing an environmentally friendly blended yarn of claim 1 wherein in the second step, a multi-bin cotton blender for blending polyester fibers employs KINGDA MA-6.
10. The method for producing environment-friendly blended yarn according to claim 1, wherein in the third step, the process adopts the principles of 'heavy pressurization, large distance, smooth passage, winding prevention and blocking prevention' in the pre-drawing process of the regenerated polyester strips.
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| CN110714247B (en) * | 2019-10-17 | 2021-06-08 | 江南大学 | Production method of high-grade environment-friendly yarn |
| CN111764014A (en) * | 2020-07-03 | 2020-10-13 | 浙江云山纺织印染有限公司 | Manufacturing process of polyester cotton yarn |
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