CN111041564A - Equipment and method for producing colored short fibers of direct spinning polyester - Google Patents
Equipment and method for producing colored short fibers of direct spinning polyester Download PDFInfo
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- CN111041564A CN111041564A CN201811187762.1A CN201811187762A CN111041564A CN 111041564 A CN111041564 A CN 111041564A CN 201811187762 A CN201811187762 A CN 201811187762A CN 111041564 A CN111041564 A CN 111041564A
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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
- D01D1/02—Preparation of spinning solutions
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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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- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The invention provides a production device and a method of colored short fiber of direct spinning terylene, the device comprises a melt pipeline and a double screw extruder which are respectively connected by the same metering pump, a dynamic mixer which is simultaneously connected with the melt pipeline and the double screw extruder, and a static mixer, a metering pump and a spinning box which are sequentially connected with the dynamic mixer. The synthesized polyester melt is quantitatively distributed into two parts by a metering pump, one part enters a melt pipeline, the other part enters a double-screw extruder, meanwhile, pigment powder and additives thereof are continuously added into the double-screw extruder to be primarily mixed with the polyester melt, the colored melt in the double-screw extruder is re-injected into the melt pipeline through a booster pump to be mixed with the original blank polyester melt, the mixture enters a dynamic mixer to be uniformly mixed with the pigment, the mixture is further mixed through a static mixer, and the uniformly mixed colored polyester melt enters a spinning box body. The dynamic mixer is adopted to uniformly mix the pigments in the colored melt, so that the quality of the colored fibers is improved, and the service life of the component is prolonged.
Description
Technical Field
The invention relates to a colored fiber, in particular to a production device and a method of the colored fiber.
Background
The dope dyed fiber is a colored fiber obtained by adding a colorant into a spinning solution or a melt and spinning, and is also called as a non-dyed fiber or a spun-dyed fiber. The stock solution coloring can save the printing and dyeing process, avoid generating a large amount of printing and dyeing wastewater, and has outstanding environment-friendly characteristics. In addition, the dope dyed polyester colored yarns also have the characteristics of good appearance, uniform color, high color fastness and the like, so the polyester colored yarns are deeply welcomed by the industries of yarn weaving, knitting, wool spinning and the like, and have good development prospect.
In the prior coloring technology before spinning, the method is mostly realized by adding pigment carriers such as color master batches, color oil or pigment microcapsules, and the like, and the spinning is carried out after the pigment carriers are mixed with polyester. The color master batch needs to be added with high-content pigment, and pigment agglomeration is easily caused by too high concentration. The production process of the pigment carrier is complex, a large amount of auxiliary agents such as a dispersing agent, a carrier and the like are required to be added in the processing process, the substances generally have a strong plasticizing effect, the mechanical property of the polyester colored yarn can be obviously reduced, and the common defects influence the quality of the colored fiber before spinning to different degrees.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide production equipment and method of colored short fiber of direct spinning terylene, aiming at the defects of the prior art, pigment is quantitatively added and mixed into spinning melt, the pigment and the melt are uniformly mixed through a dynamic mixer and a static mixer, the pigment is uniformly dispersed in the colored melt, the service cycle of a component is prolonged, the problem of short service cycle of the component during production of colored yarn is solved, and the online direct spinning of the colored yarn is realized. Compared with other dyed color fibers, the fiber has better color fastness and weather resistance, no pollution, environmental protection, energy conservation and simple process.
The technical scheme is as follows: a production device of colored short fiber of direct spinning terylene comprises a melt pipeline and a double-screw extruder which are respectively connected by the same metering pump, a dynamic mixer which is simultaneously connected with the melt pipeline and the double-screw extruder, and a static mixer, a metering pump and a spinning box body which are sequentially connected with the dynamic mixer.
Further, the dynamic mixer includes the barrel, installs in barrel axis and rotatory axis of rotation, even being equipped with the pin in the axis of rotation, evenly distributed's crescent groove is seted up on the inner wall of barrel and axis of rotation surface.
Further, the pins are arranged in a row at intervals of 90 degrees along the length direction of the rotating shaft; one end of each pin is fixed on the rotating shaft, and the other end of each pin extends out vertically.
Further, all the crescent-shaped grooves are perpendicular to the forward flow direction of the melt.
A method for producing colored short fiber of direct spinning terylene comprises quantitatively distributing synthetic polyester melt into two parts by a metering pump, feeding one part into a melt pipeline and the other part into a double-screw extruder, continuously adding pigment powder and additive into the double-screw extruder to be primarily mixed with the polyester melt, re-injecting the colored melt in the double-screw extruder into the melt pipeline through a booster pump to be mixed with the original blank polyester melt, feeding the mixture into a dynamic mixer to uniformly mix the melt with pigment, further mixing the mixture by a static mixer, and feeding the uniformly mixed colored polyester melt into a spinning box.
Further, the polyester melt entering the twin-screw extruder accounts for 10 wt% to 50 wt% of the total polyester melt.
Furthermore, the adding amount of the pigment powder added into the double-screw extruder accounts for 0.1 to 5 weight percent of the total polyester melt.
Further, the pigment powder and the additive thereof can be replaced by high-temperature resistant dye and other additives.
Furthermore, the temperature of the double-screw extruder is set to be 275-288 ℃, and the rotating speed is 50-80 r/min.
Further, the melt is filtered in a spinning assembly and then is made into tows through a spinneret plate under the pressure of 10-20MPa, the pigment/dye is uniformly dispersed in the polyester melt, the colored melt is sprayed out of the spinneret plate to form protofilaments, and the protofilaments are balanced for 20 hours and then packaged after being bundled, drawn, oiled, tensed, heat-set, oiled, curled, loosened and heat-set by a post-drawing process and cut.
The invention principle is as follows: when the colored melt mixed in the initial step enters a dynamic mixer barrel, a pin mixing element rotating along with a shaft in the barrel continuously shears and divides the melt, the melt is divided into two parts after meeting a mixing element and is mixed with other parts of melt, and the melt is continuously divided and mixed. And when the fluid flows along the axial direction of the crescent groove, the fluid flows along the radial direction, so that the flow direction of the melt is distributed in a three-dimensional manner. The moment the fluid flows out of one crescent is stripped into the other alveolus, also undergoing a shearing action. Through the multiple continuous shearing and mixing, the pigment is fully dispersed in the melt, and the effect of high efficiency and strong shearing is achieved.
The invention realizes the on-line addition of the pigment and the on-line direct spinning of the polyester color yarn by the on-line addition of the pigment/dye, the double-screw premixing and the mixing of the dynamic mixer and the uniform dispersion of the pigment/dye in the spinning melt. Compared with other dope dyeing spinning technologies, the process of producing the pigment carrier is omitted, and the cost is saved. Compared with other dyed color fibers, the fiber has better color fastness and weather resistance, and is pollution-free, environment-friendly and energy-saving. In order to improve the dispersion uniformity of the pigment powder, a two-step mixing method of double-screw premixing and dynamic mixer mixing is adopted. The effect of uniform dispersion of the pigment powder is achieved by mixing twice.
Mixing for the first time: the polyester melt is quantitatively distributed by a metering pump, and a part of the polyester melt enters a double-screw extruder. The pigment powder and the additive thereof are continuously added into a double-screw extruder through a metering device, and the pigment, the additive and the polyester melt are preliminarily mixed in the double-screw extruder.
And (3) mixing for the second time: colored melt in the double-screw extruder is injected into a melt pipeline again through a booster pump to be mixed with the original blank polyester melt, enters a dynamic mixer, and generates the phenomena of shearing, laminar flow, vortex flow and the like under the stirring and shunting action of a mixing element rotating along with a shaft in a machine barrel, pigment powder is efficiently dispersed in the polyester melt, the melt can achieve the mixing effect in a short time, and the problem of uneven adding and dispersing of high-proportion powder is solved.
Has the advantages that: 1) the pigment proportion is accurately measured by a meter, online controllable addition is realized, and different pigments, dyes and other additives can be directly added into the polyester melt.
2) The dynamic mixer is adopted to uniformly mix the pigments in the colored melt, so that the quality of the colored fibers is improved, and the service life of the component is prolonged.
3) Through pigment injection and two-step mixing device, the pigment is uniformly mixed into the spinning melt, and the on-line direct spinning of the polyester colored yarn is realized. Compared with other dope dyeing spinning technologies, the process of producing pigment carriers is omitted, the cost is saved, and the fiber strength is higher. Compared with other dyed color fibers, the fiber has better color fastness and weather resistance, and is pollution-free, environment-friendly and energy-saving.
Description of the drawings fig. 1 is a schematic view of a production plant according to the invention;
FIG. 2 is a front view of the dynamic mixer;
FIG. 3 is a side view of a dynamic mixer;
FIG. 4 is a schematic view of the inner wall of the barrel of the dynamic mixer.
Detailed Description
The technical solution of the present invention is described in detail below, but the scope of the present invention is not limited to the embodiments.
Example 1
A production device of colored short fiber of direct spinning terylene is shown in figure 1 and comprises a melt pipeline and a double-screw extruder which are respectively connected by the same metering pump, wherein the double-screw extruder is connected back to the melt pipeline through a booster pump, and finally the melt pipeline is sequentially connected with a dynamic mixer, a static mixer, a metering pump and a spinning box body.
Specifically, as shown in fig. 2 and 3, the dynamic mixer includes a cylinder 1 and a rotating shaft 2 installed in the central axis of the cylinder 1 and rotating, pins 3 are uniformly arranged on the rotating shaft 2 along the length direction thereof, and a row is arranged at intervals of 90 degrees; one end of each pin 3 is fixed on the rotating shaft 2, and the other end of each pin vertically extends out. The inner wall of the machine barrel 1 and the surface of the rotating shaft 2 are provided with crescent grooves 4 which are uniformly distributed, and the concave surfaces of all the crescent grooves 4 face to the same direction and are vertical to the forward flowing direction of the melt, as shown in fig. 4.
The diameter of the rotating shaft 2 is 90mm, the length of the rotating shaft 2 is 3150mm, the height of the pin 3 is 36mm, and the diameter of the pin 3 is 10.5 mm. The length of the crescent groove 4 on the inner wall of the machine barrel 1 is 300mm, the length of the crescent groove 4 on the surface of the rotating shaft 2 is 40mm, and the maximum depth is 8 mm. The processing capacity of the dynamic mixer is 3750kg/h, the length-diameter ratio is 35:1, the shearing temperature rise is less than or equal to 0.5 ℃, and the flow fluctuation is controlled to be less than or equal to 0.5 percent.
A production method of colored short fiber of direct spinning terylene comprises the following steps:
mixing materials: setting the flow rate of a polyester melt pipeline to be 26.9Kg/min, introducing 50 wt% of polyester melt into a double-screw extruder through a metering pump, setting the temperature of five zones of the double-screw extruder to be 275 ℃/275 ℃/280 ℃/280 ℃/280 ℃, and setting the rotating speed of the double-screw extruder to be 60r/min, mixing a red organic pigment, a polyester wax dispersant and an antioxidant 1010 according to a certain ratio (100:3:2), adding the mixture into a meter, adding the polyester melt through the meter, and shearing and blending the mixture in the double-screw extruder;
dynamic mixing: remitted into a polyester melt pipeline through a booster pump, and then enter a dynamic mixer and a static mixer to be uniformly mixed into colored polyester melt;
spinning: the colored melt enters a spinning manifold for spinning, the temperature of the spinning manifold is 288 ℃, the spinning position number is 18, the fineness of protofilaments is 4.09dtex, and the spinning speed is 1230 m/min; the effective content of the pigment in the fiber is 1 wt%;
post-spinning: the method comprises the steps of raw yarn bundling and drafting treatment, wherein the first-drawing multiplying power is 3.06, the second-drawing multiplying power is 1.15, the drafting speed is 260m/min, an oiling device in front of a tense setting machine is used for oiling the drafted composite tows, the oiled tows enter a crimping machine for further enhancing the crimping performance, then enter relaxation heat setting for oiling agent solidification and tow orientation setting, and the set tows are directly sent to a cutting machine through a conveying belt to be cut off and then sent to a packaging machine for packaging to obtain the 1.33dtex multiplied by 38mm red polyester staple fibers.
Example 2
Mixing materials: setting the flow rate of a polyester melt pipeline at 29.5Kg/min, introducing 30 wt% of polyester melt into a double-screw extruder through a metering pump, setting the temperature of five zones of the double-screw extruder at 275 ℃/275 ℃/280 ℃/280 ℃/280 ℃, and setting the rotating speed of the double-screw extruder at 60r/min, mixing a red organic pigment, a polyester wax dispersant and an antioxidant 1010 according to a certain ratio (100:5:2), adding into a meter, adding the polyester melt through the meter, and shearing and blending in the double-screw extruder;
dynamic mixing: remitted into a polyester melt pipeline through a booster pump, and then enter a dynamic mixer and a static mixer to be uniformly mixed into colored polyester melt;
spinning: the colored melt enters a spinning manifold for spinning, the temperature of the spinning manifold is 288 ℃, the spinning position number is 17, the fineness of protofilaments is 5.34dtex, and the spinning speed is 1085 m/min; the effective content of the pigment in the fiber is 1.5 wt%;
post-spinning: the method comprises the steps of raw yarn bundling and drafting treatment, wherein the first-drawing multiplying power is 3.30, the second-drawing multiplying power is 1.165, the drafting speed is 260m/min, an oiling device in front of a tense setting machine is used for oiling the drafted composite tows, the oiled tows enter a crimping machine for further enhancing the crimping performance, then enter relaxation heat setting for oiling agent solidification and tow orientation setting, and the set tows are directly sent into a cutting machine through a conveying belt to be cut off and then sent into a packaging machine for packaging to obtain the 1.56dtex multiplied by 51mm red polyester staple fibers.
Example 3
Mixing materials: setting the flow of a polyester melt pipeline at 29.5Kg/min, introducing 10 wt% of polyester melt into a double-screw extruder through a metering pump, setting the temperature of five zones of the double-screw extruder at 275 ℃/275 ℃/275 ℃/275 ℃/275 ℃ and the rotating speed of the double screws at 50r/min, mixing a blue organic pigment, a polyethylene wax dispersant and an antioxidant 1010 according to a certain ratio (100:1:2), adding the mixture into a meter, adding the organic pigment into the polyester melt through the meter, and shearing and blending in the double-screw extruder;
dynamic mixing: remitted into a polyester melt pipeline through a booster pump, and then enter a dynamic mixer and a static mixer to be uniformly mixed into colored polyester melt;
spinning: the colored melt enters a spinning manifold for spinning, the temperature of the spinning manifold is 288 ℃, the spinning position number is 17, the fineness of protofilaments is 5.34dtex, and the spinning speed is 1085 m/min; the effective content of the pigment in the fiber is 0.1 wt%;
post-spinning: the method comprises the steps of raw yarn bundling and drafting treatment, wherein the first-drawing multiplying power is 3.30, the second-drawing multiplying power is 1.165, the drafting speed is 260m/min, an oiling device in front of a tense setting machine is used for oiling the drafted composite tows, the oiled tows enter a crimping machine for further enhancing the crimping performance, then enter relaxation heat setting for oiling agent solidification and tow orientation setting, and the set tows are directly sent into a cutting machine through a conveying belt to be cut off and then sent into a packaging machine for packaging to obtain the 1.56dtex multiplied by 51mm red polyester staple fibers.
Example 4
Mixing materials: setting the flow rate of a polyester melt pipeline to be 26.9Kg/min, introducing 50 wt% of polyester melt into a double-screw extruder through a metering pump, setting the temperature of five zones of the double-screw extruder to be 280 ℃/280 ℃/285 ℃/285 ℃/285 ℃ and the rotating speed of the double screw to be 60r/min, mixing carbon black, a polyethylene wax dispersant and an antioxidant 1010 according to a certain ratio (100:5:2), adding into a meter, adding into the polyester melt through the meter, and shearing and blending in the double-screw extruder;
dynamic mixing: remitted into a polyester melt pipeline through a booster pump, and then enter a dynamic mixer and a static mixer to be uniformly mixed into colored polyester melt;
spinning: the colored melt enters a spinning manifold for spinning, the temperature of the spinning manifold is 288 ℃, the spinning position number is 17, the fineness of protofilaments is 5.34dtex, and the spinning speed is 1085 m/min; the effective content of the pigment in the fiber is 3 wt%;
post-spinning: the method comprises the steps of raw yarn bundling and drafting treatment, wherein the first-drawing multiplying power is 3.06, the second-drawing multiplying power is 1.15, the drafting speed is 260m/min, an oiling device in front of a tense setting machine is used for oiling the drafted composite tows, the oiled tows enter a crimping machine for further enhancing the crimping performance, then enter relaxation heat setting for oiling agent solidification and tow orientation setting, and the set tows are directly sent into a cutting machine through a conveying belt to be cut off and then sent into a packaging machine for packaging to obtain the black polyester short fibers with the thickness of 1.33dtex multiplied by 38 mm.
Example 5
Mixing materials: setting the flow rate of a polyester melt pipeline to be 26.9Kg/min, introducing 50 wt% of polyester melt into a double-screw extruder through a metering pump, setting the temperature of five zones of the double-screw extruder to be 285 ℃/288 ℃/288 ℃/288 ℃, and setting the rotating speed of the double-screw extruder to be 80r/min, mixing carbon black, a polyethylene wax dispersant and an antioxidant 1010 according to a certain proportion (100:5:2), adding into a meter, adding into the polyester melt through the meter, and shearing and blending in the double-screw extruder;
dynamic mixing: remitted into a polyester melt pipeline through a booster pump, and then enter a dynamic mixer and a static mixer to be uniformly mixed into colored polyester melt;
spinning: the colored melt enters a spinning manifold for spinning, the temperature of the spinning manifold is 288 ℃, the spinning position number is 17, the fineness of protofilaments is 5.34dtex, and the spinning speed is 1085 m/min; the effective content of the pigment in the fiber is 5 wt%;
post-spinning: the method comprises the steps of raw yarn bundling and drafting treatment, wherein the first-drawing multiplying power is 3.06, the second-drawing multiplying power is 1.15, the drafting speed is 260m/min, an oiling device in front of a tense setting machine is used for oiling the drafted composite tows, the oiled tows enter a crimping machine for further enhancing the crimping performance, then enter relaxation heat setting for oiling agent solidification and tow orientation setting, and the set tows are directly sent into a cutting machine through a conveying belt to be cut off and then sent into a packaging machine for packaging to obtain the black polyester short fibers with the thickness of 1.33dtex multiplied by 38 mm.
Table 1 example data
In the embodiment, the finished product of the colored polyester short fiber has high strength, the light fastness is more than or equal to 4.5 grade, the service cycle of the component is long, and the production requirement is met.
Claims (10)
1. A colored short-staple production facility of direct spinning dacron which characterized in that: the device comprises a melt pipeline and a double-screw extruder which are respectively connected by the same metering pump, a dynamic mixer which is simultaneously connected with the melt pipeline and the double-screw extruder, and a static mixer, a metering pump and a spinning manifold which are sequentially connected with the dynamic mixer.
2. The production equipment of the colored staple fiber of direct spinning polyester fiber according to claim 1, characterized in that: the dynamic mixer comprises a machine barrel and a rotating shaft which is arranged on the central axis of the machine barrel and rotates, pins are uniformly arranged on the rotating shaft, and crescent grooves which are uniformly distributed are formed in the inner wall of the machine barrel and the surface of the rotating shaft.
3. The production equipment of the colored staple fiber of direct spinning polyester fiber according to claim 2, characterized in that: the pins are arranged in a row at intervals of 90 degrees along the length direction of the rotating shaft; one end of each pin is fixed on the rotating shaft, and the other end of each pin extends out vertically.
4. The production equipment of the colored staple fiber of direct spinning polyester fiber according to claim 2, characterized in that: all crescent-shaped grooves are perpendicular to the forward flow direction of the melt.
5. A method for producing colored short fiber of direct spinning terylene is characterized in that: the synthesized polyester melt is quantitatively distributed into two parts by a metering pump, one part enters a melt pipeline, the other part enters a double-screw extruder, meanwhile, pigment powder and additives thereof are continuously added into the double-screw extruder to be primarily mixed with the polyester melt, the colored melt in the double-screw extruder is re-injected into the melt pipeline through a booster pump to be mixed with the original blank polyester melt, the mixture enters a dynamic mixer to be uniformly mixed with the pigment, the mixture is further mixed through a static mixer, and the uniformly mixed colored polyester melt enters a spinning box body.
6. The method for producing colored staple fiber of direct-spun polyester as claimed in claim 5, wherein: the polyester melt entering the twin-screw extruder accounts for 10 wt% to 50 wt% of the total polyester melt.
7. The method for producing colored staple fiber of direct-spun polyester as claimed in claim 5, wherein: the addition amount of the pigment powder added into the double-screw extruder accounts for 0.1 to 5 weight percent of the total polyester melt.
8. The method for producing colored staple fiber of direct-spun polyester as claimed in claim 5, wherein: the pigment powder and the additive thereof can be replaced by high-temperature resistant dye and other additives.
9. The method for producing colored staple fiber of direct-spun polyester as claimed in claim 5, wherein: the temperature of the double-screw extruder is set to 275-288 ℃, and the rotating speed is 50-80 r/min.
10. The method for producing colored staple fiber of direct-spun polyester as claimed in claim 5, wherein: filtering the melt in a spinning assembly, forming the melt into tows through a spinneret plate under the pressure of 10-20MPa, uniformly dispersing pigment/dye in the polyester melt, ejecting precursor fibers from the spinneret plate, balancing the precursor fibers for 20 hours, bundling, drafting, oiling, tension heat setting, oiling, a crimping machine, a relaxation heat setting machine in a post-drawing process, and packaging after cutting.
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