CN111321482A - Production process and device of colored polylactic acid filament yarn - Google Patents
Production process and device of colored polylactic acid filament yarn Download PDFInfo
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- CN111321482A CN111321482A CN202010131089.0A CN202010131089A CN111321482A CN 111321482 A CN111321482 A CN 111321482A CN 202010131089 A CN202010131089 A CN 202010131089A CN 111321482 A CN111321482 A CN 111321482A
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- polylactic acid
- color master
- master batch
- colored
- raw material
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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
-
- 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
- D01D13/00—Complete machines for producing artificial threads
-
- 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
Abstract
The invention discloses a production process and a device of colored polylactic acid filaments; the method comprises the following steps: (1) adding the dried polylactic acid color master batch into the polylactic acid slices according to a certain proportion for fully mixing; (2) the polylactic acid slices and the polylactic acid color master batches are subjected to raw material mixing by a color master batch raw material mixer, and then the raw materials enter a screw extruder for melt extrusion; (3) conveying the mixed melt to a spinning box body with a metering pump, and spraying colored polylactic acid primary yarns from the mixed melt through a metering pump spinneret assembly; (4) oiling the colored polylactic acid primary yarn while cooling, wherein the oiling mode is that oiling is carried out by an oil nozzle, and then the colored polylactic acid primary yarn enters a winding machine to prepare pre-oriented yarn (POY); (5) finally preparing a colored polylactic acid filament; the method solves the problems of uneven mixing of polylactic acid color master batches and polylactic acid slices and poor dispersity of polylactic acid melt, and the prepared colored polylactic acid filament yarn has good glossiness and no color difference, and can well meet the requirements of subsequent weaving processing and customers.
Description
Technical Field
The invention relates to the technical field of polylactic acid fiber textile production, in particular to a production process and a device of colored polylactic acid filaments.
Background
The polylactic acid fiber is prepared by using starch-containing agricultural products such as corn, wheat and beet as raw materials, fermenting to generate lactic acid, and then performing polycondensation and melt spinning. The polylactic acid fiber is a synthetic fiber which can be planted as a raw material and is easy to plant, and the waste can be naturally degraded in nature. It can be decomposed into carbon dioxide and water by the action of microbes in soil or seawater, and when it is burnt, it does not emit toxic gas and cause pollution, so that it is a sustainable ecological fibre. The fabric has good hand feeling and drapability, is ultraviolet resistant, has lower flammability and excellent processing performance, is suitable for various fashionable dress, leisure wear, sports goods, sanitary goods and the like, and has wide application prospect.
With the progress of polylactic acid fiber production technology and the continuous expansion of market application, polylactic acid fiber woven products are more and more favored by consumers, especially the development of colored polylactic acid fiber production and application, and polylactic acid fibers more and more show the advantage that common fibers have no ethical ratio. At present, the polylactic acid fiber is dyed mainly by finishing dyeing of weaving and dyeing, namely dyeing by using a disperse fuel, but the dyeing can be carried out only in the presence of a carrier at high temperature and high pressure, the damage to the fiber is large, and the dyed fiber has poor fastness to sunlight, washing resistance, ironing and the like due to poor hygroscopicity of the polylactic acid fiber, and the traditional dyeing method has the characteristics of large energy consumption, low efficiency and serious pollution, which are contrary to the characteristics of polylactic acid circulating renewable resources.
Compared with polyester raw materials, the polylactic acid slices have higher viscosity and deviation of melt flowability, and the added polylactic acid color master batch has poor melt dispersibility, so that the color difference problem exists in the production of colored polylactic acid fiber products, and the subsequent weaving processing is influenced; therefore, the research on a production method which can improve the uniform mixing of the polylactic acid color master batch and the polylactic acid slices and can ensure good glossiness of the colored polylactic acid filaments and no color difference of products has practical significance.
Disclosure of Invention
The invention aims to solve the technical problem of providing a production process and a device of colored polylactic acid filament yarns, which ensure that polylactic acid color master batches and polylactic acid slices are uniformly mixed, and the colored polylactic acid filament yarns have high glossiness and no color difference.
In order to solve the technical problems, the technical scheme of the invention is as follows: a production process of colored polylactic acid filaments comprises the following steps:
(1) feeding the crystallized and dried polylactic acid slices into a material pipe C with a stirring device through a port A, and mixing after adding a certain amount of polylactic acid color master batch raw material;
(2) adding polylactic acid color master batch into a color master drying box, and setting the drying temperature and time parameters of the polylactic acid color master batch on a temperature control panel;
(3) the dried polylactic acid color master batch enters a color master batch distributor;
(4) the master batch distributor is used for mixing the polylactic acid slices falling into the corresponding polylactic acid master batches from the port B according to a set proportion by calculating the polylactic acid slices in the master batch raw material mixer;
(5) fully mixing the polylactic acid slices and the polylactic acid color master batch in a material C pipe; in the color master batch raw material mixer, the polylactic acid slices are conveyed in by pressure, are contacted with the falling polylactic acid color master batch to play a mixing role, and are fully mixed by a stirrer configured in the color master batch raw material mixer;
(6) the raw materials mixed by the color master batch raw material mixer fall into a screw extruder by self weight for compression and melting; the screw extruder designed according to the characteristics of the polylactic acid slices can mix and melt the mixed polylactic acid slices and the polylactic acid color master batch, so that the micromolecules of the polylactic acid color master batch are uniformly dispersed in the micromolecules of the polylactic acid slices, the melt is fully mixed, the probability of color difference of filaments is reduced, and the glossiness of the fibers can be improved;
(7) the melt after passing through the screw extruder enters a static mixer to be mixed and then enters a spinning box body with a metering pump, the melt is pressed into a spinneret plate assembly through the metering pump, colored polylactic acid nascent filaments are formed through spinning of a spinneret plate, oiling is carried out while the nascent filaments are cooled, oiling is carried out in an oiling mode through an oil nozzle, and then the colored polylactic acid filaments are obtained through a winding machine; the prepared colored polylactic acid filament yarn product hosiery belt has high detected glossiness and no color difference, meets the requirements of subsequent weaving processing, and meets the market demand on the diversity of polylactic acid products.
As a preferred embodiment, the dried polylactic acid color master batch is evenly fed to the color master batch distributor through a material-shifting wheel controlled by a speed reducer.
As a preferred embodiment, the crystallization temperature of the polylactic acid slices is 80-85 ℃, the drying temperature is 90-100 ℃, and the dried slices enter the color master batch raw material mixer from the port A through pressure conveying.
As a preferred embodiment, the polylactic acid color master batch is put into a color master batch drying oven, the drying temperature is 100-110 ℃, the drying time is 4H-4.5H, the dried polylactic acid color master batch sequentially passes through a material stirring wheel and a port B and enters a color master batch distributor, and the color master batch distributor falls into a color master batch raw material mixer according to the proportion of 2-3 percent and is stirred and mixed with the polylactic acid slices.
The utility model provides a production device of coloured polylactic acid filament, including look female drying cabinet, dial the material wheel, look female distributor, look female raw materials blender and screw extruder, the discharge gate of look female drying cabinet is connected with the feed inlet of dialling the material wheel, the discharge gate of dialling the material wheel and the feed inlet of look female distributor, the discharge gate of look female distributor is connected with look female raw materials blender's B mouth, still be provided with A mouth on the look female raw materials blender, look female raw materials blender's A mouth and B mouth and C material pipe UNICOM, look female raw materials blender's C material pipe is connected with screw extruder's feed inlet.
As a preferred embodiment, a temperature control panel for controlling the temperature and the time of the color master drying box is connected to the color master drying box.
As a preferred embodiment, the material stirring wheel and the color master dispenser are respectively provided with a speed reducer.
The beneficial effects obtained by adopting the technical scheme are as follows: the polylactic acid color master batch and the polylactic acid chip are mixed by a special color master batch raw material mixer, the polylactic acid chip and the polylactic acid color master batch are fully mixed in the color master batch raw material mixer, and the polylactic acid chip and the polylactic acid color master batch are mixed into a melt and are fully mixed for multiple times by a subsequent screw extruder and a static mixer, so that the problems of uneven mixing of the polylactic acid color master batch and the polylactic acid chip and poor dispersibility of the polylactic acid melt are solved, the prepared colored polylactic acid filament has good glossiness and no color difference, and can well meet the requirements of subsequent weaving processing and customers.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a polylactic acid masterbatch of the present invention after drying and mixing with polylactic acid chips in a masterbatch raw material mixer;
fig. 2 is a schematic structural diagram of the color masterbatch raw material mixer of the present invention.
In the figure: 1-color master batch drying oven; 2-a material poking wheel; 3-a color master distributor; 4-color master batch mixer; 5-screw extruder; 6-A port; 7-port B; 8-C material pipe; 9-a speed reducer; 10-temperature control panel.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The invention is further described with reference to the accompanying drawings, so that the technical personnel in the technical field can better implement the invention, and the production process of the colored polylactic acid filament comprises the following steps:
(1) feeding the crystallized and dried polylactic acid slices into a material pipe C with a stirring device through a port A, and mixing after adding a certain amount of polylactic acid color master batch raw material;
(2) adding polylactic acid color master batch into a color master drying box, and setting the drying temperature and time parameters of the polylactic acid color master batch on a temperature control panel; specifically, polylactic acid color master batch is put into a color master batch drying oven, the drying temperature is 100-110 ℃, the drying time is 4H-4.5H, the dried polylactic acid color master batch sequentially passes through a material shifting wheel and a port B and enters a color master batch distributor, and the color master batch distributor falls into a color master batch raw material mixer according to the proportion of 2-3 percent and is stirred and mixed with polylactic acid slices.
(3) The dried polylactic acid color master batch enters a color master batch distributor;
(4) the master batch distributor is used for mixing the polylactic acid slices falling into the corresponding polylactic acid master batches from the port B according to a set proportion by calculating the polylactic acid slices in the master batch raw material mixer;
(5) fully mixing the polylactic acid slices and the polylactic acid color master batch in a material C pipe; in the color master batch raw material mixer, the polylactic acid slices are conveyed in by pressure, are contacted with the falling polylactic acid color master batch to play a mixing role, and are fully mixed by a stirrer configured in the color master batch raw material mixer;
(6) the raw materials mixed by the color master batch raw material mixer fall into a screw extruder by self weight for compression and melting; the screw extruder designed according to the characteristics of the polylactic acid slices can mix and melt the mixed polylactic acid slices and the polylactic acid color master batch, so that the micromolecules of the polylactic acid color master batch are uniformly dispersed in the micromolecules of the polylactic acid slices, the melt is fully mixed, the probability of color difference of filaments is reduced, and the glossiness of the fibers can be improved;
(7) the melt after passing through the screw extruder enters a static mixer to be mixed and then enters a spinning box body with a metering pump, the melt is pressed into a spinneret plate assembly through the metering pump, colored polylactic acid nascent filaments are formed through spinning of a spinneret plate, oiling is carried out while the nascent filaments are cooled, oiling is carried out in an oiling mode through an oil nozzle, and then the colored polylactic acid filaments are obtained through a winding machine; the prepared colored polylactic acid filament yarn product hosiery belt has high detected glossiness and no color difference, meets the requirements of subsequent weaving processing, and meets the market demand on the diversity of polylactic acid products.
The dried polylactic acid color master batch of the embodiment of the invention is uniformly fed to the color master batch distributor through a material stirring wheel controlled by a speed reducer. The crystallization temperature of the polylactic acid slices is 80-85 ℃, the drying temperature is 90-100 ℃, and the dried slices enter the color master batch raw material mixer from the port A through pressure conveying.
The invention embodiment relates to a production device of colored polylactic acid filaments, which comprises a color master drying box 1, a material stirring wheel 2, a color master distributor 3, a color master raw material mixer 4 and a screw extruder 5, wherein a discharge port of the color master drying box 1 is connected with a feed port of the material stirring wheel 2, a discharge port of the material stirring wheel 2 is connected with a feed port of the color master distributor 3, a discharge port of the color master distributor 3 is connected with a port B7 of the color master raw material mixer 4, a port A6 is also arranged on the color master raw material mixer 4, the port A6 and the port B7 of the color master raw material mixer 4 are communicated with a material pipe C, the material pipe C of the color master raw material mixer 4 is connected with a feed port of the screw extruder 5, and speed reducers 9 are respectively arranged on the material stirring wheel 2 and the color master raw material distributor 3. In order to control the temperature and time conveniently, the color master drying box 1 is connected with a temperature control panel 10 for controlling the temperature and time.
In the embodiment of the invention, polylactic acid color master batches are dried and then are brought into a color master batch distributor through a material stirring wheel 2, and the color master batch distributor falls into a color master batch raw material mixer according to the proportion of 2.5 percent and is stirred and mixed with polylactic acid slices; uniformly mixing polylactic acid slices and polylactic acid color master batches, melting the mixture by a screw extruder 5, mixing a melt by a static mixer, feeding the mixed melt into a spinning manifold with a metering pump, pressing the melt into a spinneret plate assembly by the metering pump, and forming colored polylactic acid primary yarns by spinning of a spinneret plate;
oiling while cooling the primary raw silk, wherein the oiling mode is oiling through an oil nozzle, and then, feeding the primary raw silk into a winding machine to obtain colored polylactic acid filaments;
the specific process parameters are as follows:
the invention relates to a production process and a device of colored polylactic acid filaments, which are based on the following principles: the polylactic acid chip has the intrinsic viscosity of 1.17dl/g and the melt index of 24g/10min, which is much higher than that of polyester chips (0.7dl/g), the melt viscosity is high, the dispersibility is poor, the polylactic acid color master batch and the polylactic acid chip are mixed fully through a special color master batch raw material mixer, the polylactic acid chip and the polylactic acid color master batch are mixed fully in the color master batch raw material mixer, the polylactic acid chip and the polylactic acid color master batch are mixed with the melt and are fully mixed for a plurality of times through a subsequent screw extruder and a static mixer, the problems of uneven mixing of polylactic acid color master batches and polylactic acid slices and poor dispersity of polylactic acid melt are solved, the prepared colored polylactic acid filament yarn has good glossiness and no color difference, and can well meet the requirements of subsequent weaving processing and customers.
Since the advent of the world, the polylactic acid fiber is supported by policies in various regions due to natural degradability, the performance of the polylactic acid fiber is very close to that of a synthetic polyester fiber, the polylactic acid fiber can well meet the application requirements of fashion, casual wear, underwear, sports goods, sanitary goods and the like, the yield is gradually increased in recent years, the problems in the production of colored polylactic acid filaments are solved, space and more possibility are provided for the further development of the polylactic acid fiber, and the superiority of the polylactic acid fiber is closer to the life of people.
The colored polylactic acid filament yarn production process is smooth, the large-scale mass production requirement can be met, the product has good degree of customs and no color difference, the produced colored polylactic acid filament yarn (POY) product can well meet the requirement of subsequent texturing or flat drawing processing, the produced polylactic acid weaving product has good glossiness and no color difference, the performance difference is not large compared with other synthetic fibers, the fabric has good hand feeling and drapability and is uvioresistant, the colored polylactic acid filament yarn has lower flammability, excellent processing performance and the like, and the colored polylactic acid filament yarn is suitable for various fashionable dresses, casual dresses, close-fitting clothes, sporting goods, hygienic goods and the like and has wide market application prospect.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (7)
1. A production process of colored polylactic acid filaments is characterized by comprising the following steps: the method comprises the following steps:
(1) feeding the crystallized and dried polylactic acid slices into a material pipe C with a stirring device through a port A, and mixing after adding a certain amount of polylactic acid color master batch raw material;
(2) adding polylactic acid color master batch into a color master drying box, and setting the drying temperature and time parameters of the polylactic acid color master batch on a temperature control panel;
(3) the dried polylactic acid color master batch enters a color master batch distributor;
(4) the master batch distributor is used for mixing the polylactic acid slices falling into the corresponding polylactic acid master batches from the port B according to a set proportion by calculating the polylactic acid slices in the master batch raw material mixer;
(5) fully mixing the polylactic acid slices and the polylactic acid color master batch in a material C pipe;
(6) the raw materials mixed by the color master batch raw material mixer fall into a screw extruder by self weight for compression and melting;
(7) the melt after passing through the screw extruder enters a static mixer to be mixed and then enters a spinning box body with a metering pump, the melt is pressed into a spinneret plate assembly through the metering pump, colored polylactic acid nascent filaments are formed through spinning of a spinneret plate, oiling is carried out while the nascent filaments are cooled, and then the colored polylactic acid filament is prepared in a winding machine.
2. A process for producing colored polylactic acid filaments according to claim 1, wherein: and (3) uniformly discharging the dried polylactic acid color master batch to a color master batch distributor through a material poking wheel controlled by a speed reducer.
3. A process for producing colored polylactic acid filaments according to claim 1, wherein: the crystallization temperature of the polylactic acid slices is 80-85 ℃, the drying temperature is 90-100 ℃, and the dried slices enter the color master batch raw material mixer from the port A through pressure conveying.
4. A process for producing colored polylactic acid filaments according to claim 1, wherein: putting polylactic acid color master batch into a color master batch drying box, drying at the temperature of 100-110 ℃ for 4H-4.5H, enabling the dried polylactic acid color master batch to sequentially pass through a material shifting wheel and a port B and enter a color master batch distributor, and enabling the color master batch distributor to fall into a color master batch raw material mixer according to the proportion of 2-3% and then stirring and mixing with polylactic acid slices.
5. A production device of colored polylactic acid filament yarn is characterized in that: the automatic feeding device comprises a color master drying box, a shifting wheel, a color master distributor, a color master raw material mixer and a screw extruder, wherein a discharge port of the color master drying box is connected with a feed port of the shifting wheel, a discharge port of the shifting wheel is connected with a feed port of the color master distributor, a discharge port of the color master distributor is connected with a port B of the color master raw material mixer, a port A is further arranged on the color master raw material mixer, the port A and the port B of the color master raw material mixer are communicated with a pipe C, and the pipe C of the color master raw material mixer is connected with the feed port of the screw extruder.
6. A colored polylactic acid filament production apparatus according to claim 5, wherein: the color master drying box is connected with a temperature control panel for controlling the temperature and time of the color master drying box.
7. A colored polylactic acid filament production apparatus according to claim 5, wherein: and the material stirring wheel and the color master distributor are respectively provided with a speed reducer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010131089.0A CN111321482A (en) | 2020-02-28 | 2020-02-28 | Production process and device of colored polylactic acid filament yarn |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010131089.0A CN111321482A (en) | 2020-02-28 | 2020-02-28 | Production process and device of colored polylactic acid filament yarn |
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Cited By (1)
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| CN112126992A (en) * | 2020-07-28 | 2020-12-25 | 东华大学 | Preparation method of color gradient fiber |
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