CN112176461A - Preparation method of recycled cotton fibers and preparation method of yarns thereof - Google Patents
Preparation method of recycled cotton fibers and preparation method of yarns thereof Download PDFInfo
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- CN112176461A CN112176461A CN202010959106.XA CN202010959106A CN112176461A CN 112176461 A CN112176461 A CN 112176461A CN 202010959106 A CN202010959106 A CN 202010959106A CN 112176461 A CN112176461 A CN 112176461A
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- recycled cotton
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Classifications
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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
- D01G11/00—Disintegrating fibre-containing articles to obtain fibres for re-use
- D01G11/04—Opening rags to obtain fibres for re-use
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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
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
- D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/66—Disintegrating fibre-containing textile articles to obtain fibres for re-use
Abstract
The invention discloses a preparation method of recycled cotton fibers, which is characterized in that the recycled cotton fibers are prepared and obtained through a mechanical method and have good spinnability.
Description
Technical Field
The invention belongs to the field of fiber materials, and particularly relates to a preparation method of recyclable cotton fibers recovered from waste textiles and waste clothes and a preparation method of yarns of the recyclable cotton fibers.
Background
With the improvement of the living standard of people and the fast fashion consumption, the service cycle of clothes, household textiles and the like is shortened day by day, the quantity of waste textiles and waste clothes is increased year by year correspondingly, the recycling rate of the waste textile clothes in China is less than 10 percent, and the great resource waste is caused. The recycling of waste textiles and clothes has attracted wide attention of all countries in the world, and recycling plans of the waste textiles and the waste clothes are proposed by a plurality of brands such as the delicacy, H & M and the like.
At present, methods for recycling waste textile clothing include mechanical methods, physical methods, chemical methods, physicochemical methods and the like. Wherein, the mechanical method is to directly decompose waste textiles and clothes into fibers; the physical method is that the chemical structure and the chemical composition of the fiber are not damaged, and the regenerated fiber is obtained by re-spinning after certain processing; the chemical method is to convert the fiber into monomer by chemical method, and then to prepare regenerated fiber by polymerization and spinning; the physical and chemical method is generally used as the main method and the auxiliary method, and the regenerated fiber is prepared by spinning. Among the methods, the mechanical method for recycling the fibers has the advantages of simple process, low cost and no sewage discharge, but most of the waste textiles recycled by the mechanical method in China are simply cut and opened, the prepared fibers have short length and poor mechanical property, and cannot be spun, so the fibers can only be used as fillers and composite material plates and applied to furniture decoration, toys, automobile interior trimming panels and the like, and the fibers flow to the market as black cotton due to insufficient standardization of production and management, thereby causing the wrong area of recycling the textiles for people.
Therefore, it is necessary to provide a further solution to the above problems.
Disclosure of Invention
The invention aims to provide a preparation method of recycled cotton fibers and a preparation method of yarns thereof, and solves the problems.
The technical scheme of the invention is as follows:
a method for preparing recycled cotton fibers, which comprises the following steps:
(1) sorting the recycled waste textiles and the recycled clothes, removing metal parts or clothing accessories, cooking and sterilizing for 30-60 min at the temperature of 70-100 ℃, and drying to obtain sterilized waste fabrics and clothing;
(2) directly putting the sterilized waste fabrics and clothes into a storage cylinder of a mechanical recovery system, cutting the waste fabrics and clothes into small square fabrics with the side length of 5-15 cm, and opening and carding to obtain recycled cotton fibers, wherein the recovery rate of the recycled cotton fibers is greater than or equal to 90%, the short fiber rate is 15-20%, and the blending ratio is greater than or equal to 50%.
Further, the opening treatment in the step (2) is divided into two steps, the speed of the first opening treatment is 1-3 m/min, and the speed of the second opening treatment is 1-5 m/min.
Further, the carding in the step (2) is carried out twice in total.
The technical scheme of the invention is as follows:
a method of making recycled cotton-type yarn, the method comprising: blending the recycled cotton fibers and the conventional cotton fibers into 20-30 tex yarns according to the proportion of 10-30/70-90, and obtaining the recycled cotton fiber/conventional cotton fiber blended yarns.
Further, in the blending, the technological parameters of the roving are as follows: the flyer rotating speed is 250r/min, the sliver ration is 30g/5m, the raw material coefficient is 0.3, the longitudinal density coefficient is 0.775, the roving ration is 12g/10cm, the forming coefficient is 1.50mm, and the roving twist is 50-70 twists/m.
Further, in the blending, the process parameters of the spun yarn are as follows: the rotating speed of the spindle is 1500r/min, the total draft is 30.5, the rotating speed of the front roller is 23.9r/min, the rotating speed of the rear roller is 0.78r/min, the draft ratio of the rear area is 1.00 times, and the twist of the spun yarn is 600-800 twists/m.
Further, the yarn is measured by a Uster yarn evenness tester to obtain: the yarn evenness unevenness rate U of the recycled cotton fiber/conventional cotton fiber blended yarn is 10% -16%, the hairiness value H is 5-7, the yarn breaking strength is larger than 9cN/tex, and the breaking elongation is 7% -11%.
The invention provides a preparation method of recycled cotton fibers, which is characterized in that the recycled cotton fibers are prepared by a mechanical method, have good spinnability, can be blended with cotton, cotton terylene, viscose, modal and other fibers to prepare yarns with good evenness and mechanical properties, and realize the regeneration and processing of waste textiles and waste clothes into textiles for household and clothes.
Detailed Description
The invention discloses a preparation method of recycled cotton type fibers, which uses wastes of home textile and clothes made of all cotton, cotton blended fabrics, cotton chemical fiber fabrics and the like, wastes in home textile and clothes processing and the like as raw materials and adopts a mechanical method to recycle the cotton and the cotton type chemical fibers. The basic processing process comprises the following steps: sorting, sterilizing, cutting, primary opening, secondary opening, primary carding, secondary carding, packaging and the like. The method comprises the steps of sorting recycled waste textiles and clothes to remove metal parts such as zippers and other clothes accessories, then cooking and sterilizing for 30-60 min at 70-100 ℃, drying, and directly putting sterilized waste textiles and clothes into a storage barrel of a mechanical recycling system. The fabric in the storage cylinder is regenerated into cotton type fiber which can be spun after being cut, opened and carded. Opening the fabric after the fabric is cut into square small pieces with the side length of 5-15 cm, wherein the speed of the first opening is 1-3 m/min, and after the first opening, part of yarns are opened into fibers, but a certain amount of yarns and small cloth pieces are remained; and then, performing second opening so that most of yarns are opened into fibers, wherein the speed of the second opening is 1-5 m/min. And conveying the opened fibers into a carding machine, carding the residual yarns into fibers on one hand, and carding the fibers in order on the other hand, removing impurities and scraps, and carding twice so that the length and the uniformity of the recovered fibers meet the requirements of a spinning process. The recovery rate of the fiber is more than 90%, the short fiber rate is 15% -20%, the fiber can be blended with cotton, cotton type terylene, viscose, modal and other fibers, and the blending ratio of the recovered fiber in the blended yarn can reach more than 50%. Measured by a Uster yarn evenness tester to obtain: the yarn evenness unevenness rate U of the recovered cotton fiber/conventional natural cotton fiber blended yarn is 10% -16%, the hairiness value H is 5-7, the breaking strength of the yarn is greater than 9cN/tex, and the breaking elongation is 7% -11%.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying the present invention are further described below. The invention is not limited to the embodiments listed but also comprises any other known variations within the scope of the invention as claimed.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
The embodiment shows a preparation method of recycled cotton fibers according to the following steps: sorting and sterilizing the leftover materials of the polyester/cotton knitted garment processing, cutting the leftover materials into fabric blocks of about 10cm x 10cm by a cutting machine, conveying the fabric blocks into a first opener, wherein the linear speed of the opening is 1m/min, and after the first opening, part of yarns are opened into fibers, but a certain amount of yarns and small cloth pieces are remained; then, second opening is carried out, the opening linear speed is 2m/min, and more than 80% of yarns are opened into fibers. The opened fiber is conveyed into a carding machine, and carding is carried out twice, so that the length and the uniformity of the recovered fiber meet the requirements of a spinning process. Blending the recycled fiber and the conventional cotton fiber into 20tex yarn according to the proportion of 10/90, wherein the roving process parameters are as follows: the flyer rotating speed is 250r/min, the sliver ration is 30g/5m, the raw material coefficient is 0.3, the longitudinal density coefficient is 0.775, the roving ration is 12g/10cm, the forming coefficient is 1.50mm, and the roving twist is 60 twists/m. The spun yarn process parameters are as follows: the spindle rotation speed is 1500r/min, the total draft is 30.5, the front roller rotation speed is 23.9r/min, the rear roller rotation speed is 0.78r/min, the rear zone draft ratio is 1.00 times, and the spun yarn twist is 700 twists/m. The yarn had a yarn irregularity U of 14.19%, a hairiness value H of 5.08, a yarn breaking strength of 14.9cN/tex and an elongation at break of 10.42%.
Example 2
The embodiment shows a preparation method of recycled cotton fibers according to the following steps: sorting and sterilizing all-cotton woven home textile processing leftover materials, cutting the leftover materials into fabric blocks of about 10cm x 10cm by using a cutting machine, conveying the fabric blocks into a first opener, wherein the opening linear speed is 2m/min, and after the first opening, part of yarns are opened into fibers, but a certain amount of yarns and small cloth pieces are remained; then, second opening is carried out, the opening linear speed is 3m/min, and more than 70 percent of yarns are opened into fibers. The opened fiber is conveyed into a carding machine, and carding is carried out twice, so that the length and the uniformity of the recovered fiber meet the requirements of a spinning process. Blending the recycled fiber and the conventional cotton fiber into 26tex yarn according to the proportion of 20/80, wherein the roving process parameters are as follows: the flyer rotating speed is 250r/min, the sliver ration is 30g/5m, the raw material coefficient is 0.3, the longitudinal density coefficient is 0.775, the roving ration is 12g/10cm, the forming coefficient is 1.50mm, and the roving twist is 60 twists/m. The spun yarn process parameters are as follows: the spindle rotation speed is 1500r/min, the total draft is 30.5, the front roller rotation speed is 23.9r/min, the rear roller rotation speed is 0.78r/min, the rear zone draft ratio is 1.00 times, and the spun yarn twist is 600 twists/m. The yarn unevenness U was 15.79%, the hairiness value H was 5.60, the yarn breaking strength was 9.8cN/tex, and the elongation at break was 9.82%.
Example 3
The embodiment shows a preparation method of recycled cotton fibers according to the following steps: sorting and sterilizing all-cotton woven home textile processing leftover materials, cutting the leftover materials into fabric blocks of about 10cm x 10cm by using a cutting machine, conveying the fabric blocks into a first opener, wherein the opening linear speed is 3m/min, and after the first opening, part of yarns are opened into fibers, but a certain amount of yarns and small cloth pieces are remained; then, second opening is carried out, the opening linear speed is 5m/min, and more than 70 percent of yarns are opened into fibers. The opened fiber is conveyed into a carding machine, and carding is carried out twice, so that the length and the uniformity of the recovered fiber meet the requirements of a spinning process. The recycled fiber was blended with conventional cotton fiber in a ratio of 30/70 to a 30tex yarn. The roving process parameters are as follows: the flyer rotating speed is 250r/min, the sliver ration is 30g/5m, the raw material coefficient is 0.3, the longitudinal density coefficient is 0.775, the roving ration is 12g/10cm, the forming coefficient is 1.50mm, and the roving twist is 70 twist/m. The spun yarn process parameters are as follows: the spindle rotation speed is 1500r/min, the total draft is 30.5, the front roller rotation speed is 23.9r/min, the rear roller rotation speed is 0.78r/min, the rear zone draft ratio is 1.00 times, and the spun yarn twist is 700 twists/m. The yarn unevenness U was 15.03%, the hairiness value H was 5.10, the yarn breaking strength was 13.3cN/tex, and the elongation at break was 8.74%.
Example 4
The embodiment shows a preparation method of recycled cotton fibers according to the following steps: sorting and sterilizing waste all-cotton knitted clothes, cutting the clothes into fabric blocks of about 10cm x 10cm by a cutting machine, conveying the fabric blocks into a first opener, wherein the opening linear speed is 1m/min, and after the first opening, part of yarns are opened into fibers, but a certain amount of yarns and small cloth blocks are remained; then, second opening is carried out, the opening linear speed is 2m/min, and more than 85% of yarns are opened into fibers. The opened fiber is conveyed into a carding machine, and carding is carried out twice, so that the length and the uniformity of the recovered fiber meet the requirements of a spinning process. Blending the recycled fiber and the conventional cotton fiber into 26tex yarn according to the proportion of 15/85, wherein the roving process parameters are as follows: the flyer rotating speed is 250r/min, the sliver ration is 30g/5m, the raw material coefficient is 0.3, the longitudinal density coefficient is 0.775, the roving ration is 12g/10cm, the forming coefficient is 1.50mm, and the roving twist is 50 twists/m. The spun yarn process parameters are as follows: the spindle rotation speed is 1500r/min, the total draft is 30.5, the front roller rotation speed is 23.9r/min, the rear roller rotation speed is 0.78r/min, the rear zone draft ratio is 1.00 times, and the spun yarn twist is 800 twists/m. The yarn unevenness U was 15.70%, the hairiness value H was 5.60, the yarn breaking strength was 11.3cN/tex, and the elongation at break was 7.21%.
According to the preparation method of the recycled cotton fiber, the recycled cotton fiber is prepared by a mechanical method and has good spinnability, while the recycled fiber obtained by the mechanical method in the prior art has high short fiber rate and no spinnability, so that the produced fiber can only be used as a filler or a raw material of a composite board. Compared with physical methods, chemical methods and physical and chemical methods, the preparation method of the recycled cotton fibers has the advantages of simple process and low cost, and can be spun into yarns for processing clothing fabrics.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (7)
1. A preparation method of recycled cotton fibers is characterized by comprising the following steps:
(1) sorting the recycled waste textiles and the recycled clothes, removing metal parts or clothing accessories, cooking and sterilizing for 30-60 min at the temperature of 70-100 ℃, and drying to obtain sterilized waste fabrics and clothing;
(2) directly putting the sterilized waste fabrics and clothes into a storage cylinder of a mechanical recovery system, cutting the waste fabrics and clothes into small square fabrics with the side length of 5-15 cm, and opening and carding to obtain recycled cotton fibers, wherein the recovery rate of the recycled cotton fibers is greater than or equal to 90%, the short fiber rate is 15-20%, and the blending ratio is greater than or equal to 50%.
2. The method for preparing recycled cotton-type fibers according to claim 1, wherein the method comprises the steps of: the opening treatment in the step (2) is divided into two steps, the speed of the first opening treatment is 1-3 m/min, and the speed of the second opening treatment is 1-5 m/min.
3. The method for preparing recycled cotton-type fibers according to claim 1, wherein the method comprises the steps of: the carding in the step (2) is carried out twice.
4. A preparation method of recycled cotton type yarns is characterized by comprising the following steps: blending the recycled cotton fiber prepared by the method for preparing the recycled cotton fiber according to any one of claims 1 to 3 with conventional cotton fiber according to the proportion of 10 to 30/70 to 90 to obtain a yarn of 20 to 30tex, thereby obtaining a recycled cotton fiber/conventional cotton fiber blended yarn.
5. The method of claim 4, wherein the roving process parameters in the blending are as follows: the flyer rotating speed is 250r/min, the sliver ration is 30g/5m, the raw material coefficient is 0.3, the longitudinal density coefficient is 0.775, the roving ration is 12g/10cm, the forming coefficient is 1.50mm, and the roving twist is 50-70 twists/m.
6. The method of claim 4, wherein the spun yarn is produced by the following steps: the rotating speed of the spindle is 1500r/min, the total draft is 30.5, the rotating speed of the front roller is 23.9r/min, the rotating speed of the rear roller is 0.78r/min, the draft ratio of the rear area is 1.00 times, and the twist of the spun yarn is 600-800 twists/m.
7. The method for preparing recycled cotton-type yarn according to claim 4, wherein the recycled cotton-type yarn is obtained by measurement of a Uster yarn evenness tester: the yarn evenness unevenness rate U of the recycled cotton fiber/conventional cotton fiber blended yarn is 10% -16%, the hairiness value H is 5-7, the yarn breaking strength is larger than 9cN/tex, and the breaking elongation is 7% -11%.
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| CN114753032A (en) * | 2022-04-05 | 2022-07-15 | 山东超越纺织有限公司 | Compact siro spinning process for modal, dell acrylic fiber and graphene fiber |
| CN115012087A (en) * | 2022-07-13 | 2022-09-06 | 深圳畅享体感科技有限公司 | Manufacturing method of regenerated environment-friendly composite yarn and regenerated environment-friendly yarn |
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Application publication date: 20210105 |