CN112481715A - Preparation method of regenerated colored polyester low stretch yarn - Google Patents
Preparation method of regenerated colored polyester low stretch yarn Download PDFInfo
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- CN112481715A CN112481715A CN202011347324.4A CN202011347324A CN112481715A CN 112481715 A CN112481715 A CN 112481715A CN 202011347324 A CN202011347324 A CN 202011347324A CN 112481715 A CN112481715 A CN 112481715A
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- regenerated
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- colored polyester
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/04—Melting filament-forming substances
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/06—Feeding liquid to the spinning head
- D01D1/065—Addition and mixing of substances to the spinning solution or to the melt; Homogenising
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/10—Filtering or de-aerating the spinning solution or melt
- D01D1/106—Filtering
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
- D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
- D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/04—Pigments
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/06—Dyes
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
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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
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
- D02G1/0206—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Artificial Filaments (AREA)
Abstract
The invention discloses a preparation method of regenerated colored polyester low stretch yarns, which comprises the following steps: (1) melting the waste polyester bottle material; (2) primary filtration; (3) carrying out melting treatment on the color master batch; (4) dispersing and mixing; (5) secondary filtration; (6) spinning; (7) oiling treatment; (8) and (5) elasticizing treatment. The invention relates to a preparation method of regenerated colored polyester low stretch yarns, which is characterized in that waste polyester bottles are used as raw materials to prepare the regenerated colored polyester low stretch yarns, and color master batch melt and the regenerated melt fused by the waste polyester bottle materials are mixed and spun, so that on one hand, the preparation of the regenerated colored polyester low stretch yarns is convenient, on the other hand, the melt viscosity of the regenerated melt is reduced to a range suitable for spinning by utilizing the color master batch melt, the melt viscosity adjusting method is simple and convenient, and the prepared regenerated colored polyester low stretch yarns have excellent mechanical properties and good dyeing properties.
Description
Technical Field
The invention relates to the field of chemical fibers, in particular to a preparation method of regenerated colored polyester low stretch yarns.
Background
With the use of polyester bottle material in large quantities, the waste polyester bottle material also becomes a serious environmental pollution problem because of the non-biodegradability. The main applications of polyester recovery at present are regenerated fibers, regenerated bottles, chemical method recovery raw materials, engineering plastics, plastic steel belts, films, plates and the like. The method for producing the regenerated polyester fiber by using the waste polyester bottle material is the most main way for recycling the polyester at present, and can also effectively reduce the production cost of the polyester fiber.
However, because the melt viscosity of the melted recycled polyester is relatively high, the spinning performance of the melted recycled polyester can be affected directly, and the prior art generally adopts the thermal refining treatment of the melted recycled polyester melt to improve the melt viscosity of the melt suitable for spinning, but has the defects of inconvenient thermal refining operation, high difficulty and the like. In addition, most of the waste polyester bottles are colored and cannot be used to produce colorless fibers.
Disclosure of Invention
The invention mainly solves the technical problem of providing a preparation method of regenerated colored polyester low stretch yarns, which can solve the problems in the existing production of regenerated polyester fibers.
In order to solve the technical problems, the invention adopts a technical scheme that: the preparation method of the regenerated colored polyester low stretch yarn comprises the following steps:
(1) melting treatment of waste polyester bottle material: after being pretreated, the recycled waste polyester bottle material is melted by a screw extruder to obtain a regenerated melt;
(2) primary filtration: filtering the regenerated melt obtained in the step (1) by a first-stage filter to remove impurities;
(3) melting the color master batch: selecting and melting color master batch to obtain color master batch melt;
(4) dispersing and mixing: sequentially passing the regenerated melt filtered in the step (2) through a booster pump, a coupling unit and a dynamic uniform disperser, adding the color master batch melt prepared in the step (3) from the coupling unit, uniformly mixing by the dynamic uniform disperser, testing the viscosity of the mixed melt to reach the spinning viscosity, and stopping adding the color master batch melt;
(5) secondary filtration: filtering the mixed melt obtained in the step (4) by a secondary filter;
(6) spinning: adding the mixed melt subjected to secondary filtration in the step (5) into a spinning box, spinning into tows, and uniformly blowing and cooling the tows by circular blowing;
(7) oiling treatment: oiling and finishing the cooled tows by an oiling device;
(8) elasticizing treatment: and (4) sequentially passing the filament bundles subjected to the oiling treatment in the step (7) through a pre-network nozzle, a filament guide, a hot drafting roller, a false twister, a final network and a winding roller to obtain the regenerated colored polyester low-stretch yarn.
In a preferred embodiment of the invention, the method of pretreatment comprises washing, dehumidification, pre-crystallization and drying.
In a preferred embodiment of the present invention, in the step (2), the filter element of the primary filter is 20 to 25 μm, and the filtering pressure is 10 to 13 MPa.
In a preferred embodiment of the present invention, in the step (3), the color master batches are mixed master batches in which magenta master batches, cyan master batches and yellow master batches are proportioned and mixed according to a target color.
In a preferred embodiment of the present invention, in the step (4), the viscosity of the test mixed melt is 0.68 to 0.74 dl/g.
In a preferred embodiment of the present invention, in the step (5), the filter element of the secondary filter is 38 to 45 μm, and the filtering pressure is 10 to 13 MPa.
In a preferred embodiment of the present invention, in the step (6), the temperature of the spinning is 285-295 ℃.
In a preferred embodiment of the present invention, in the step (6), the process conditions of the circular blowing are as follows: the wind temperature is 22-25 ℃, the wind speed is 0.5-0.7 m/s, and the humidity is 65-70%.
In a preferred embodiment of the present invention, in the step (8), the draft ratio of the hot-drawing roll is 1.8 to 2.2 times.
In a preferred embodiment of the present invention, in the step (8), the winding speed is 4000 to 4600 m/min.
The invention has the beneficial effects that: the invention relates to a preparation method of regenerated colored polyester low stretch yarns, which is characterized in that waste polyester bottles are used as raw materials to prepare the regenerated colored polyester low stretch yarns, and color master batch melt and the regenerated melt fused by the waste polyester bottle materials are mixed and spun, so that on one hand, the preparation of the regenerated colored polyester low stretch yarns is convenient, on the other hand, the melt viscosity of the regenerated melt is reduced to a range suitable for spinning by utilizing the color master batch melt, the melt viscosity adjusting method is simple and convenient, and the prepared regenerated colored polyester low stretch yarns have excellent mechanical properties and good dyeing properties.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.
The embodiment of the invention comprises the following steps:
example 1
The invention discloses a preparation method of regenerated colored polyester low stretch yarns, which takes waste polyester bottle reclaimed materials as raw materials, and prepares the colored polyester low stretch yarns by adding color master batches, and reduces the viscosity of a melt of the waste polyester bottle reclaimed materials after melting by using the color master batches so as to achieve the viscosity range of spinnable yarns.
The preparation method comprises the following steps:
(1) melting treatment of waste polyester bottle material: after the recycled waste polyester bottle material is subjected to washing, dehumidifying, pre-crystallizing and drying pretreatment, a screw extruder is adopted for melting to obtain a regenerated melt;
specifically, the dehumidification method comprises the following steps: adopting a dehumidifier, using compressed air with the dew point of-20 ℃, and enabling the dew point of dry air at an outlet of the dehumidifier to be below-85 ℃; the moisture removal rate was 800 kg/h.
The pre-crystallization is carried out by adopting dry air with the temperature of 172-175 ℃, and the pre-crystallization temperature is controlled to be 170-175 ℃; the water content of the dried waste polyester bottle material is below 30 ppm.
The extrusion conditions of the extruder are as follows: the temperature in zone 1 is 275 deg.C, the temperature in zone 2 is 275 deg.C, the temperature in zone 3 is 275 deg.C, the temperature in zone 4 is 280 deg.C, the temperature in zone 5 is 280 deg.C, the temperature in zone 6 is 280 deg.C, the temperature in zone 7 is 285 deg.C, and the temperature in zone 8 is 285 deg.C.
(2) Primary filtration: filtering the regenerated melt obtained in the step (1) by a primary filter with a filter element of 20-25 mu m, controlling the filtering pressure to be 10MPa, and filtering out impurities;
(3) melting the color master batch: selecting three primary color masterbatches of a magenta master batch, a cyan master batch and a yellow master batch, and metering and mixing the three primary color masterbatches according to the target color brown to obtain a mixed master batch;
(4) dispersing and mixing: pressurizing the regenerated melt filtered in the step (2) to 10MPa by a booster pump, then passing through a coupling unit and a dynamic uniform disperser, adding the color master batch melt prepared in the step (3) from the coupling unit in the second process, mixing with the regenerated melt, finally uniformly mixing by the dynamic uniform disperser, testing the viscosity of the mixed melt in the dynamic uniform disperser, and stopping adding the color master batch melt after the spinning viscosity reaches 0.68-0.74 dl/g;
(5) secondary filtration: filtering the mixed melt obtained in the step (4) through a secondary filter with a filter element of 38-45 mu m under the pressure of 11MPa, and further removing impurities;
(6) spinning: adding the mixed melt subjected to secondary filtration in the step (5) into a spinning box at the temperature of 285-295 ℃, sequentially passing through a metering pump, a spinning assembly and a spinneret plate, spinning into tows, and uniformly blowing and cooling the tows by using circular blowing;
wherein, the process conditions of the circular blowing are as follows: the wind temperature is 24 ℃, the wind speed is 0.7m/s, and the humidity is 65%; the cooling air of the outer ring blowing device is uniformly blown to the round tows along the radial direction by round air, so that the evenness index and the extension uniformity of the tows can be effectively improved;
(7) oiling treatment: oiling and finishing the cooled tows by an oiling device; the phenomena of broken filaments and end heads of the tows can be effectively solved through oiling treatment;
(8) elasticizing treatment: sequentially passing the filament bundles subjected to the oiling treatment in the step (7) through a pre-network nozzle, a filament guide, a hot drafting roller, a false twister, a final network and a winding roller to obtain the regenerated colored polyester low-stretch yarns; wherein the drafting multiplying power of the hot drafting roller is 2.2 times, and the winding speed is 4600 m/min.
The regenerated colored polyester low stretch yarn prepared by the method is tested according to the existing test standard in the field, and the test shows that the breaking strength is 3.41cN/dtex, the elongation at break is 18 percent, and the dyeing uniformity is 4 grade.
The preparation method of the regenerated colored polyester low stretch yarn has the following advantages:
1. the regenerated polyester low stretch yarn is prepared by taking the waste polyester bottle as a raw material, so that the waste is recycled, the resources are effectively saved, and the cost is reduced;
2. the three-primary-color master batch melt and the waste polyester bottle material molten regenerated melt are mixed and spun, on one hand, the preparation of the regenerated colored polyester low stretch yarn is facilitated, on the other hand, the master batch melt is utilized to reduce the melt viscosity of the regenerated melt to a range suitable for spinning, the melt viscosity adjusting method is simple and convenient, and two purposes are achieved at one stroke;
3. the prepared regenerated colored polyester low stretch yarn has excellent mechanical property and good dyeing property.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. The preparation method of the regenerated colored polyester low stretch yarn is characterized by comprising the following steps:
(1) melting treatment of waste polyester bottle material: after being pretreated, the recycled waste polyester bottle material is melted by a screw extruder to obtain a regenerated melt;
(2) primary filtration: filtering the regenerated melt obtained in the step (1) by a first-stage filter to remove impurities;
(3) melting the color master batch: selecting and melting color master batch to obtain color master batch melt;
(4) dispersing and mixing: sequentially passing the regenerated melt filtered in the step (2) through a booster pump, a coupling unit and a dynamic uniform disperser, adding the color master batch melt prepared in the step (3) from the coupling unit, uniformly mixing by the dynamic uniform disperser, testing the viscosity of the mixed melt to reach the spinning viscosity, and stopping adding the color master batch melt;
(5) secondary filtration: filtering the mixed melt obtained in the step (4) by a secondary filter;
(6) spinning: adding the mixed melt subjected to secondary filtration in the step (5) into a spinning box, spinning into tows, and uniformly blowing and cooling the tows by circular blowing;
(7) oiling treatment: oiling and finishing the cooled tows by an oiling device;
(8) elasticizing treatment: and (4) sequentially passing the filament bundles subjected to the oiling treatment in the step (7) through a pre-network nozzle, a filament guide, a hot drafting roller, a false twister, a final network and a winding roller to obtain the regenerated colored polyester low-stretch yarn.
2. The method for preparing regenerated colored polyester drawn textured yarn according to claim 1, wherein the pretreatment method comprises washing, dehumidifying, pre-crystallizing and drying.
3. The preparation method of the recycled colored polyester drawn textured yarn as claimed in claim 1, wherein in the step (2), the filter element of the primary filter is 20-25 μm, and the filtering pressure is 10-13 MPa.
4. The method for preparing recycled colored polyester drawn textured yarn according to claim 1, wherein in the step (3), the color master batches are mixed master batches which are prepared by proportioning and mixing magenta master batches, cyan master batches and yellow master batches according to target colors.
5. The method for preparing recycled colored polyester drawn textured yarn according to claim 1, wherein in the step (4), the viscosity of the test mixed melt is 0.68-0.74 dl/g.
6. The preparation method of the recycled colored polyester drawn textured yarn as claimed in claim 1, wherein in the step (5), the filter element of the secondary filter is 38-45 μm, and the filtering pressure is 10-13 MPa.
7. The preparation method of the recycled colored polyester drawn textured yarn as claimed in claim 1, wherein in the step (6), the spinning temperature is 285-295 ℃.
8. The method for preparing the regenerated colored polyester drawn textured yarn as claimed in claim 1, wherein in the step (6), the process conditions of the circular blowing are as follows: the wind temperature is 22-25 ℃, the wind speed is 0.5-0.7 m/s, and the humidity is 65-70%.
9. The method for preparing the regenerated colored polyester drawn textured yarn according to claim 1, wherein in the step (8), the drafting multiplying power of the hot-drafting roller is 1.8-2.2 times.
10. The method for preparing the recycled colored polyester drawn textured yarn of claim 1, wherein in the step (8), the winding speed is 4000-4600 m/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011347324.4A CN112481715A (en) | 2020-11-26 | 2020-11-26 | Preparation method of regenerated colored polyester low stretch yarn |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011347324.4A CN112481715A (en) | 2020-11-26 | 2020-11-26 | Preparation method of regenerated colored polyester low stretch yarn |
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| CN112481715A true CN112481715A (en) | 2021-03-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232157A (en) * | 2021-12-24 | 2022-03-25 | 江苏恒力化纤股份有限公司 | Method for reducing tow tension in pre-network area in elasticizing production process |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114232157A (en) * | 2021-12-24 | 2022-03-25 | 江苏恒力化纤股份有限公司 | Method for reducing tow tension in pre-network area in elasticizing production process |
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