CN116716672B - Soft light special-shaped polyester pre-oriented yarn and manufacturing method thereof - Google Patents

Soft light special-shaped polyester pre-oriented yarn and manufacturing method thereof Download PDF

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Publication number
CN116716672B
CN116716672B CN202310726382.5A CN202310726382A CN116716672B CN 116716672 B CN116716672 B CN 116716672B CN 202310726382 A CN202310726382 A CN 202310726382A CN 116716672 B CN116716672 B CN 116716672B
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networking
oriented yarn
soft light
soft
yarn
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CN116716672A (en
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陈蕾
王春燕
邱中南
庄维峰
林稳
沈杰
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Tongkun Group Zhejiang Hengtong Chemical Fiber Co Ltd
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Tongkun Group Zhejiang Hengtong Chemical Fiber Co Ltd
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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
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/096—Humidity control, or oiling, of filaments, threads or the like, leaving the spinnerettes
    • 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
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
    • 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
    • D01D7/00—Collecting the newly-spun products
    • 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
    • D01F1/10—Other agents for modifying properties
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/08—Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

Abstract

The invention discloses a soft light special-shaped terylene pre-oriented yarn and a manufacturing method thereof, wherein the technical flow of the manufacturing method comprises a C part, and the C part is as follows: dynamic mixer, melt conveying, metering pump, spinneret plate extrusion, cooling forming, cluster oiling, primary pre-networking, first godet, secondary pre-networking, second godet and winding; the primary pre-network adopts air pressure of 0.02-0.05 MPa; the secondary pre-network adopts air pressure of 0.05-0.09 MPa; the actual oil content of the soft light special-shaped polyester pre-oriented yarn is 0.58-0.69%; the finish in the finally prepared soft profiled polyester pre-oriented yarn is uniformly distributed, and the 18 spinning positions produce fewer loose filaments and hairlines within 24 hours. The invention improves the homogenization effect of the oiling agent through twice pre-networking, ensures that the spinning cake is uniformly oiled, has good cohesion and bundling property, and has stable and controlled quality of fiber products.

Description

Soft light special-shaped polyester pre-oriented yarn and manufacturing method thereof
Technical Field
The invention belongs to the technical field of polyester fibers, and relates to a soft light special-shaped polyester pre-oriented yarn and a manufacturing method thereof.
Background
Chenille yarn is a novel fancy yarn, which is spun by taking two strands as core yarns and sandwiching a lupin yarn by twisting. Chenille yarn is widely applied to velvet fabrics and decorative fabrics because of the advantages of high-grade luxury, soft hand feeling, plump suede, good drapability and the like. The chenille yarn in the market at present adopts a large bright product, improves the bright effect of the subsequent fabric, and gives people visual enjoyment. However, with the pursuit of leisure, comfort and random life trend development of people, new personalized requirements are provided for the fabric, so that the bright and beautiful product of the bright chenille yarn cannot well meet the personalized requirements of people. Therefore, the soft light special-shaped polyester pre-oriented yarn is developed and is mainly applied to the chenille yarn field.
Due to TiO in the full dull fiber 2 The content is controlled to be about 2.20%, the high matting agent content reduces the reflection and flickering of the fiber, and the fiber has the advantages of soft luster, strong shielding property and the like. However, in the case of polyester fibers, any additive may become "foreign matters" affecting the polyester, so that the friction resistance between the tow and the porcelain member may be increased, resulting in an increase in spinning tension, and filament breakage, loose filaments, and the like may be easily generated. Meanwhile, paper (Yin Cuiyu, han Shufa. Discussion of the production Process of full-dull polyester POY [ J ]]Synthetic fibre industry 2007,30 (6): 50-51) mention: fiber surface TiO of full-dull POY 2 The particle agglomeration is serious, and the filaments are solidified and molded and then pass through the oil nozzle at high speed, so that the TiO on the fiber surface is easy to be rubbed with the oil nozzle 2 The particles are scraped to form powdery mildew, and when the powdery mildew is more, oil outlet holes are blocked, so that the oil application rate is reduced and uneven, and monofilaments are easily broken by friction in the friction process to form floating monofilaments.
Paper (Guo Jiajia, quantum art Cui Li, etc.. In situ polymerized melt direct spinning full extinction polyester POY production Process discussion [ J ]]Synthetic fiber industry 2021,41 (1): 74-78.) mention: because the full-dull polyester POY contains more TiO 2 The tows have strong static electricity, the tows are seriously scattered, and meanwhile, the fiber surface is rough, so that the friction resistance with porcelain pieces is greatly increased, single tows are easy to break, and broken filaments and broken ends are generated. In order to avoid the occurrence of the phenomenon, on one hand, the full-dull polyester POY oiling agent has stronger antistatic property than the conventional oiling agent, so that the cohesion among fibers is improved, and the oiling rate is also improved properly.
In summary, by increasing the spin finish, the cohesion between filaments can be improved, the bundling and smoothness of the fibers can be improved, and the friction with porcelain can be reduced. However, after the oil content is increased, the oiling agent is difficult to permeate into the fiber, so that the phenomenon of oil scraping waste occurs when the oiling agent passes through porcelain parts such as a wire guide hook. And after the tows pass through a hot box at the temperature of more than 100 ℃ during post-texturing, residual oil on the tows is easy to coke in the hot box, and further the texturing dyeing performance is affected.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a soft light special-shaped polyester pre-oriented yarn and a manufacturing method thereof.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a manufacturing method of a soft light special-shaped (i.e. fiber with special-shaped cross section) terylene pre-oriented yarn comprises a C part, wherein the C part is as follows: dynamic mixer, melt conveying, metering pump, spinneret plate extrusion, cooling forming, cluster oiling, primary pre-networking, first godet, secondary pre-networking, second godet and winding;
the primary pre-network adopts air pressure of 0.02-0.05 MPa; the secondary pre-network adopts air pressure of 0.05-0.09 MPa;
the actual oil content of the soft light special-shaped polyester pre-oriented yarn is 0.58-0.69%.
The soft profiled fiber eliminates the aurora effect of the fiber by injecting the high-proportion titanium dioxide suspension, but the titanium dioxide content is too high, so that the friction resistance between the filament bundles and the porcelain piece can be increased, the spinning tension is increased, and monofilament breakage, loose filaments and the like are easy to generate. And by improving the spinning oil application rate, the cohesion among monofilaments can be improved, the bundling property and smoothness of fibers are improved, and the friction force with porcelain pieces is reduced.
The prior art is that a pre-networking device is arranged in front of a first godet or between the first godet and a second godet, and the oiling agent on the filament bundle is homogenized by a certain pre-networking air pressure, and the cohesion of the filament bundle is increased, and the process flow is as follows: metering pump, spinneret plate extrusion, cooling forming, bundling and oiling, wire guiding hook, first wire guiding roller, pre-networking, second wire guiding roller and package; however, when the fiber has a special-shaped cross section and the actual oil content of the tow is too high (namely about 0.6%, the actual oil content of the conventional semi-extinction product is only about 0.30%), if only one pre-network air pressure exists, the tow homogenizing oil effect is relatively poor, and the phenomena of more oil on the outer layer of the tow and less oil on the inner layer of the fiber are easy to occur. Meanwhile, because the cross-sectional shape influences the uneven distribution of the oiling agent, the specific surface area of the fiber with the special-shaped cross section is generally larger than that of the fiber with the circular cross section, so that the unevenness easily occurs during oiling. In addition, the fiber bundling property of the special-shaped section is poor, and the oil agent is further unevenly distributed. If only one pre-networking device is provided (i.e. pre-networking is performed once), the friction force of the filament bundles is large due to the action of high-content titanium dioxide, and the filament breakage after friction and the like are easy to occur when the filament bundles enter a guide hook after oiling.
According to the invention, after spinning oiling and before entering the first godet, a pre-networking device is additionally arranged (namely, one pre-networking is additionally arranged), a godet in the prior art is dismantled, and meanwhile, the pressure of two pre-networking is controlled, so that the problems in the prior art are solved;
the reason that the added pre-networking device is arranged after spinning oiling and before entering the first godet is as follows: after the original process is oiled, the oil directly enters a guide wire hook (the distance between the guide wire hook and a nozzle tip is basically 15-30cm, taking a spinning speed of 3000m/min as an example, only 0.003s to 0.006s are needed from the nozzle tip to the guide wire hook, the time is too short), the actual oil content of the product is too high, and the oil does not permeate into the inner sides of 192-288 tows in a short time, namely, the phenomenon that the oil on the outer layers of the tows is more and the oil on the inner layers of the fibers is less occurs, so that the oil scraping phenomenon is caused when the oil directly enters the guide wire hook. Therefore, by additionally arranging the pre-networking device and a certain network pressure, the oiling agent is homogenized for the first time, so that the oiling agent is permeated into the inside of the filament bundle, the smoothness is better, the friction force between the filament bundle entering the filament guide hook after oiling is reduced, the breakage condition of loose filaments and monofilaments is reduced, and the uniform stability of the tension of the filament bundle before entering the first filament guide roller is also reduced; meanwhile, the phenomenon that the actual oil content is reduced and a large amount of oil is wasted due to the fact that a large amount of oil is accumulated on the surface of the fiber and is scraped directly through the wire guide hook when the pre-networking device is not added is also reduced;
The reason for removing the guide wire hook in the prior art is as follows: the front and the back of the pre-network device are respectively provided with a simple wire guide hook, so that the repeated addition of one wire guide hook is not needed, and the more the wire guide hooks are added, the friction between the wire bundles and the porcelain piece is increased, and further the abnormal production conditions such as monofilament fracture and the like are caused;
the reason for controlling the air pressure of 0.02-0.05MPa adopted by the primary pre-network is as follows: the working principle of the pre-networking device is that through a reasonably designed filament channel and a certain air flow spray hole, vortex is generated in a filament passing area in the pre-networking device, and when filament bundles pass, each filament oscillates under the action of air flow, so that the inside of the filament bundles of the oil component surface of the filament bundles passing through the oiling device is ensured to be penetrated, the spinning oil is uniformly distributed on the surface of each filament, the filament has better bundling property, and the filament running is more stable during spinning; the pre-networking device improves the cohesion of the filament bundles through 'jitter' among filaments, and a 'network node' is not required to be generated in the whole process; therefore, the oiling agent in the filament bundle is homogenized for the first time by adopting the low pre-network air pressure of 0.02-0.05MPa, so that the oiling agent is permeated into the filament bundle, the smoothness is better, the friction force between the filament bundle entering a wire guide hook after oiling is reduced, the breakage condition of loose filaments and monofilaments is reduced, and the uniform stability of the tension of the filament bundle before entering a GR1 cold roll is also reduced; meanwhile, the phenomenon that the actual oil content is reduced and a large amount of oil is wasted due to the fact that a large amount of oil is accumulated on the surface of the fiber and is scraped directly through the wire guide hook when the pre-networking device is not added is also reduced; if the pre-network air pressure is too high, the oiling agent on the surface of the filament bundle is easily blown away, so that the actual oiling rate is reduced, and meanwhile, the filament bundle is easily blown to the edge of the pre-network device at the right center of the pre-network device due to the too high air pressure, so that friction with a porcelain piece is increased, and monofilament breakage, loose yarn and the like are generated; if the pre-network air pressure is too low, the tows cannot be blown off, and the effect of penetrating the oiling agent cannot be achieved;
The reason for controlling the air pressure of 0.05-0.09MPa for the secondary pre-network is as follows: the primary function of the secondary pre-network is to further supplement the oil penetration on the basis of bundling; the effect of the over-pressure and under-pressure on the distribution of the oil is basically consistent with the first network air pressure principle: the pre-net air pressure is too high, so that the filament bundles are easily blown to the edge of the pre-net device at the right center of the pre-net device, friction with porcelain pieces is increased, and monofilament breakage, loose loop filament and the like are generated; if the pre-network air pressure is too low, the tows cannot be blown off, the effect of penetrating the oiling agent cannot be achieved, but the second pre-network air pressure also plays a role of bundling; in addition, if the air pressure is too high, the terylene pre-oriented yarn is easy to generate a network node, and the terylene pre-oriented yarn does not need the network degree; if the air pressure is too low, the bundling property of the fibers is relatively poor, and the filament bundles are easily diverged after winding and forming.
As a preferable technical scheme:
as shown in FIG. 2, the vertical distance between the oil nozzle used for beam oiling and the first pre-networking device used for primary pre-networking is 20-30cm, and the included angle A between the connecting line of the oil nozzle used for beam oiling and the first pre-networking device used for primary pre-networking and the vertical direction is 10-20 degrees; the reason for setting this distance is that: the distance between the oil nozzle and the first network device is directly related to the quantity of the filaments, and the larger the distance is, the smaller the quantity of the filaments is, because a simple filament guide hook is arranged before and after each network device is entered, if the distance is too close, the tension between the two is large, the filament guide hooks are easy to rub before the network, and the filaments are easy to break and the filaments are easy to generate; if the distance between the two is too far, the tension is too small, so that the monofilament is easy to shake, and the monofilament is easy to shake on the first godet roll to influence the winding forming; the reason for setting this angle is that: the angle directly influences the oiling uniformity and the friction force with the porcelain piece; when the oil is applied, the tows are not in direct contact with the oil applying hole, but oil is applied through 10-32 oil storage transverse lines of the oil nozzle after the oil is discharged from the oil applying hole, so that the larger the angle is, the more the oil is applied; however, the specific surface area of the special-shaped cross-section fiber is larger than that of the round cross-section fiber, so that the friction resistance between the filament bundles and the porcelain piece is increased, if the angle is too large, the spinning tension is further increased, and the filaments and the broken ends are easily generated, so that the angle is selected on the premise of uniform oiling and minimum friction force; according to the invention, the oiling uniformity of the oiling agent is further improved by optimizing the distance and the angle between the oil nozzle and the first pre-network device.
The manufacturing method of the soft light special-shaped polyester pre-oriented yarn has the spinning speed of 2500-3500m/min; when the fiber has a special-shaped section and the actual oil content of the tow is too high, the uneven distribution of the oiling agent is aggravated by the too high spinning speed in the prior art, because the spinning speed is high, the time for the tow to pass through the porcelain piece and the guide roller after oiling is shortened, the homogenization time of the oiling agent on the tow is reduced, and the uneven distribution of the oiling agent is easy to be caused; the invention has the advantages of high spinning speed, uniform distribution of the oiling agent in the final product, and effective compensation of the defects of the prior art.
The manufacturing method of the soft profiled polyester pre-oriented yarn has the advantages that the linear density of the soft profiled polyester pre-oriented yarn is 210-288dtex, the number of monofilaments is 192-288, and the fineness of the monofilaments is 0.9-1dpf; when the fiber has a special-shaped cross section and the actual oil content of the filament bundle is too high, the linear density, the number of the filaments and the fineness of the filaments of the soft special-shaped polyester pre-oriented yarn in the prior art are same as those of the invention, so that the distribution of the oiling agent in the product is uneven, because the width (radius) of an oil outlet of a nozzle is limited, basically about 1mm, the thicker the linear density is, the easier the filaments are not paved on the oil outlet, the uneven distribution of the oiling agent is easy, the more the number of the filaments are, the easier the filaments are not paved on the oil outlet, the uneven distribution of the oiling agent is easy, and the thickness of the filaments also affects the oiling agent permeability of each monofilament; when the linear density, the number of monofilaments and the fineness of the soft profiled polyester pre-oriented yarns are the same as those of the prior art, the oiling agent in the final product is uniformly distributed, and the defects of the prior art are effectively overcome.
The manufacturing method of the soft light special-shaped polyester pre-oriented yarn has the advantages that the cross section of the monofilament is flat in a straight shape.
The method for manufacturing the soft profiled polyester pre-oriented yarn mainly solves the problem that the oiling agent is difficult to uniformly distribute under certain conditions for the fiber with high actual oil content, and the high titanium dioxide content is a common cause for promoting the person skilled in the art to improve the actual oil content of the fiber.
The manufacturing method of the soft light special-shaped polyester pre-oriented yarn has the advantages that the wind pressure of cooling molding is 50+/-3 Pa, the wind temperature is 22+/-2 ℃, and the relative humidity is more than or equal to 70%.
The manufacturing method of the soft profiled polyester pre-oriented yarn has the advantages that the concentration of the oiling agent on the bundling is 13.5+/-0.5 wt%, and the pumping frequency of the oiling agent is 29+/-0.5 hz.
The manufacturing method of the soft light special-shaped polyester pre-oriented yarn comprises the steps that the distance between the first godet and the second godet is 100-150cm; the secondary pre-network is arranged between the first godet and the second godet, so that on one hand, the oiling agent can be further permeated and supplemented, and the smoothness of the tows is improved; on the other hand, as the distance between the first godet and the second godet is relatively far, the tows are easy to diverge, and the bundling property can be improved and the swaying property of the tows between the first godet and the second godet can be reduced through secondary pre-networking, so that the tension is more stable.
The manufacturing method of the soft light special-shaped polyester pre-oriented yarn comprises the following steps of A part, B part and C part; the part A is as follows: slurry preparation, first esterification, second esterification, pre-polycondensation and final polycondensation, wherein part B is as follows: masterbatch drying, screw extrusion injection and filtering; wherein, the materials obtained in the final polycondensation process of the part A and the filtration system process of the part B simultaneously enter the same melt pipeline, and then enter the dynamic mixer process of the part C.
The invention also provides the soft special-shaped polyester pre-oriented yarn prepared by the method for preparing the soft special-shaped polyester pre-oriented yarn, wherein the breaking strength of the soft special-shaped polyester pre-oriented yarn is more than or equal to 2.1cN/dtex, the breaking strength variation coefficient CV value is less than or equal to 3.0%, the breaking elongation is 120+/-3%, the breaking elongation variation coefficient CV value is less than or equal to 4.0%, and the evenness CV value is less than or equal to 1.3%; the number of times of the loose yarn phenomenon generated in 24 hours of 18 spinning positions is 0-6 (108 in the prior art), the number of times of the broken yarn phenomenon generated is 0-4 (54 in the prior art), the appearance problems of loose yarn and the like can be generated due to uneven distribution of the oiling agent, and the oiling agent distribution in the soft profiled polyester pre-oriented yarn prepared by the method is relatively uniform according to the data.
As a preferable technical scheme:
the actual oil content of the soft profiled polyester pre-oriented yarn is more than or equal to 92.4 percent of the theoretical oil content; in the prior art, after high-content oiling, a large amount of oil agent is scraped directly through a wire guide hook, so that the actual oil content is lower than the theoretical oil content, namely, the large amount of oil agent is splashed and wasted; the actual oil content testing method comprises the following steps: after the fiber is coiled and formed, weighing about 2g of fiber sample according to the standard of chemical fiber oil content test method (GB/T6504-2017), and testing by adopting an MQC23-10 nuclear magnetic resonance oil content analyzer; theoretical oil content= (oil pump rotation speed×1.003 (oil specific gravity) ×oil concentration×oil pump specification)/(pump supply).
The beneficial effects are that:
(1) The actual oil content of the soft profiled polyester pre-oriented yarn is higher, so that the cohesion of the yarn bundles is improved, the friction force between the yarn bundles and porcelain pieces can be reduced, and the number of broken filaments and loose filaments is reduced;
(2) The invention adopts two pre-networks, which not only can improve the homogenization effect of the oiling agent and lead the oiling of the spinning cake to be uniform, but also can lead the cohesion and the bundling property of the product to be better, and the quality of the fiber product to be stable and controlled;
(3) According to the invention, the first wire guide hook is replaced by the pre-net and the pre-net position and angle are optimized, so that the proportion of the actual oil content to the theoretical oil content is improved, and the oil scraping waste phenomenon of the oiling agent is less.
Drawings
FIG. 1 is a spinning process flow diagram of a method for manufacturing soft profiled polyester pre-oriented yarns;
FIG. 2 is a schematic diagram of the relative positions of a nozzle tip and a first pre-network device;
wherein, 1-glib, 2-first pre-network ware, 3-second pre-network ware, 4-first godet, 5-second godet, 6-otter board.
Detailed Description
The invention is further described below in conjunction with the detailed description. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents are intended to fall within the scope of the claims appended hereto.
The test methods of the performance indexes involved in the following embodiments are as follows:
breaking strength, breaking strength coefficient of variation CV value, elongation at break coefficient of variation CV value: according to the standard of the chemical fiber filament tensile property test method (GB/T14344-2022), a YG 023B-II type full-automatic single yarn strength machine is adopted for testing; after the sample is subjected to humidity adjustment for 4 hours under the conditions of the temperature (20+/-2) DEG C and the humidity (65+/-5)%, stretching the sample by using a full-automatic single-yarn strength machine; the specific process is as follows: firstly, determining the clamping length (500+/-1.0 mm) through an upper clamp holder and a lower clamp holder, clamping a sample by a manipulator and applying pretension (0.05+/-0.005 cN/dtex), and setting the test speed (500 mm/min) through the lower clamp holder; then, stretching the sample until the sample breaks; finally, the force sensor draws a strong-elongation curve through a data collection system, and the breaking strength and the breaking elongation are obtained through data processing; meanwhile, after the test is completed, the full-automatic single yarn strength opportunity automatically counts the breaking strength variation coefficient CV value and the breaking elongation variation coefficient CV value;
The evenness CV value: according to capacitance method of chemical fiber filament yarn non-uniformity test method (GB/T14346-2015), a USTER5 yarn dryer is adopted for testing; after the sample is subjected to humidity adjustment, the sample filaments uniformly pass through two polar plates of a capacitor, the mass in each equal interval of the sample filaments is converted into electric signals, and the percentage of the standard deviation and the average value of all the test electric signals is the evenness, wherein the test speed is 200m/min, and the sample time is 2.5min;
number of loose yarn phenomena occurring in 24 hours for 18 spinning positions: this is a visual appearance test, definition of the loose silk phenomenon: refers to the phenomenon that the end face of the package is exposed from one or a plurality of monofilaments to form an arc shape or a ring shape, but the package is not broken;
number of filament phenomena generated in 24 hours for 18 spinning positions: this is the definition of the appearance of the naked eye, the phenomenon of hairiness: refers to the phenomenon of breakage of a plurality of monofilaments.
Example 1
A method for manufacturing soft light special-shaped terylene pre-oriented yarn is shown in figure 1, wherein the process flow is divided into a part A, a part B and a part C, and the part A is as follows: slurry preparation, first esterification, second esterification, pre-polycondensation and final polycondensation; the part B is as follows: masterbatch drying, screw extrusion injection and filtering; the part C is as follows: dynamic mixer, melt conveying, metering pump, spinneret plate extrusion, cooling forming, cluster oiling, primary pre-networking (adopting a first pre-networking device 2), a first godet 4, secondary pre-networking (adopting a second pre-networking device 3), a second godet 5 and winding; the material obtained in the final polycondensation process of the part A and the filtration system process of the part B simultaneously enters the same melt pipeline, and then enters the dynamic mixer process of the part C;
The technological parameters include: the primary pre-networking air pressure is 0.02MPa, the secondary pre-networking air pressure is 0.05MPa, the spinning speed is 2500m/min, the cooling molding air pressure is 47Pa, the air temperature is 20 ℃, the relative humidity is 70%, the concentration of oil agent in the cluster oiling is 13wt%, the oil agent pump frequency is 28.5hz, the vertical distance between the oil nozzle 1 used in the cluster oiling and the first pre-networking device 2 used in the primary pre-networking is 20cm, and the included angle A between the connecting line of the oil nozzle 1 used in the cluster oiling and the first pre-networking device 2 used in the primary pre-networking and the vertical direction is 10 degrees.
The specification of the finally prepared soft light special-shaped terylene pre-oriented yarn is flat 288dtex/288f, and the cross section of the monofilament is flat in a straight shape; the content of titanium dioxide in the soft profiled polyester pre-oriented yarns is 2.2wt%; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.26cN/dtex, the breaking strength variation coefficient CV value is 2.05%, the breaking elongation is 120.3%, the breaking elongation variation coefficient CV value is 2.77%, the evenness CV value is 1.13%, the actual oil content is 0.6%, and the percentage of the actual oil content of the soft light special-shaped polyester pre-oriented yarn to the theoretical oil content is 93.1%; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 4, and the number of times of the broken yarn phenomenon generated is 3.
Comparative example 1
The manufacturing method of the soft light special-shaped terylene pre-oriented yarn is basically the same as that of the embodiment 1, and the difference is that: the procedure between the cluster oiling procedure and the first godet procedure is a godet, rather than a one-time pre-networking.
The specifications of the finally prepared soft light special-shaped terylene pre-oriented yarn are the same as those of the embodiment 1, and the cross-sectional shape of the monofilament is the same as that of the embodiment 1; the titanium dioxide content of the soft profiled polyester pre-oriented yarns is the same as that of example 1; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.12cN/dtex, the breaking strength variation coefficient CV value is 4.67%, the breaking elongation is 119.3%, the breaking elongation variation coefficient CV value is 6.28%, the evenness CV value is 1.53%, the actual oil content is 0.54%, and the percentage of the actual oil content of the soft light special-shaped polyester pre-oriented yarn to the theoretical oil content is 84.9%; the number of the loose yarn phenomena generated in the 18 spinning positions for 24 hours is 112, and the number of the yarn phenomena generated in the 18 spinning positions is 58.
As can be seen by comparing the example 1 with the comparative example 1, compared with the example 1, the actual oil content and the actual oil content of the comparative example 1 are reduced by the percentage of the theoretical oil content, the number of times of the loose yarn phenomenon and the number of times of the yarn phenomenon generated in 18 spinning positions for 24 hours are greatly increased, because the comparative example 1 only has one pre-network air pressure, the tow directly enters the yarn guide hook after passing through the nozzle, the effect of homogenizing the oil agent of the tow is relatively poor, the phenomenon that the oil agent of the outer layer of the tow is more, the oil agent of the inner layer of the fiber is less, the phenomenon of scraping oil is generated when entering the yarn guide hook, and the percentage of the oil content and the actual oil content of the theoretical oil content are reduced; and because the homogenization effect of the tows is poor, and the distribution of the oiling agent is not uniform due to the influence of the cross section shape, the fiber with the special-shaped cross section is generally larger than the fiber with the circular cross section, so that the non-uniformity is easy to occur during oiling, meanwhile, the bundling property of the fiber with the special-shaped cross section is poor, the distribution of the oiling agent is further non-uniform, and the occurrence times of the loose yarn phenomenon and the broken yarn phenomenon are further increased.
Comparative example 2
The manufacturing method of the soft light special-shaped terylene pre-oriented yarn is basically the same as that of the embodiment 1, and the difference is that: the primary pre-network uses air pressure of 0.01 MPa.
The specifications of the finally prepared soft light special-shaped terylene pre-oriented yarn are the same as those of the embodiment 1, and the cross-sectional shape of the monofilament is the same as that of the embodiment 1; the titanium dioxide content of the soft profiled polyester pre-oriented yarns is the same as that of example 1; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.23cN/dtex, the breaking strength variation coefficient CV value is 2.17%, the breaking elongation is 120.8%, the breaking elongation variation coefficient CV value is 3.12%, the evenness CV value is 1.19%, the actual oil content is 0.56%, and the percentage of the actual oil content of the soft light special-shaped polyester pre-oriented yarn to the theoretical oil content is 87.4%; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 95, and the number of times of the broken yarn phenomenon generated is 42.
As can be seen by comparing example 1 with comparative example 2, the actual oil content and the percentage of the actual oil content in the theoretical oil content of comparative example 2 are reduced compared with example 1, and the number of the loose yarn phenomenon and the number of the yarn phenomenon generated in the 18 spinning positions for 24 hours are greatly increased, because the primary pre-network air pressure of comparative example 2 is too low, the yarn bundles cannot be blown off, the effect of penetrating the oil agent is not achieved, and the improvement effect is not obvious.
Comparative example 3
The manufacturing method of the soft light special-shaped terylene pre-oriented yarn is basically the same as that of the embodiment 1, and the difference is that: the primary pre-network adopts air pressure of 0.06 MPa.
The specifications of the finally prepared soft light special-shaped terylene pre-oriented yarn are the same as those of the embodiment 1, and the cross-sectional shape of the monofilament is the same as that of the embodiment 1; the titanium dioxide content of the soft profiled polyester pre-oriented yarns is the same as that of example 1; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.14cN/dtex, the breaking strength variation coefficient CV value is 1.89%, the breaking elongation is 119.8%, the breaking elongation variation coefficient CV value is 2.94%, the evenness CV value is 1.34%, the actual oil content is 0.56%, and the percentage of the actual oil content of the soft light special-shaped polyester pre-oriented yarn to the theoretical oil content is 92.1%; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 19, and the number of times of the broken yarn phenomenon generated is 21.
As can be seen from comparing example 1 with comparative example 3, the actual oil content and the percentage of the actual oil content in the theoretical oil content in comparative example 3 are reduced compared with example 1, and the number of times of the loose yarn phenomenon and the number of times of the broken yarn phenomenon generated in 18 spinning positions for 24 hours are greatly increased, because the primary pre-network air pressure in comparative example 3 is too high, the oil agent on the surface of the yarn bundle is easily blown away, the actual oil content is reduced, and meanwhile, the yarn bundle is easily blown to the edge of the pre-network device at the center of the pre-network device due to the too high air pressure, the friction with porcelain piece is increased, and the number of times of the phenomena of monofilament breakage, loose yarn and the like are further increased.
Comparative example 4
The manufacturing method of the soft light special-shaped terylene pre-oriented yarn is basically the same as that of the embodiment 1, and the difference is that: the secondary pre-network adopts air pressure of 0.04 MPa.
The specifications of the finally prepared soft light special-shaped terylene pre-oriented yarn are the same as those of the embodiment 1, and the cross-sectional shape of the monofilament is the same as that of the embodiment 1; the titanium dioxide content of the soft profiled polyester pre-oriented yarns is the same as that of example 1; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.16cN/dtex, the breaking strength variation coefficient CV value is 3.19%, the breaking elongation is 121.4%, the breaking elongation variation coefficient CV value is 3.18%, the evenness CV value is 1.48%, the actual oil content is 0.60%, and the percentage of the actual oil content of the soft light special-shaped polyester pre-oriented yarn to the theoretical oil content is 92.8%; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 6, and the number of times of the yarn phenomenon generated is 13.
As can be seen from comparing example 1 with comparative example 4, the number of times of the loose yarn phenomenon and the number of times of the yarn phenomenon generated at the 18 spinning positions for 24 hours in comparative example 4 are both increased relative to example 1, because the tow cannot be blown off by the second pre-net air pressure in comparative example 4 too low, the effect of penetrating the oil agent is not achieved, and the good bundling is not achieved, so that the tow is large in shaking on two rolls, large in tension and the tow diverges, and the monofilament is broken.
Comparative example 5
The manufacturing method of the soft light special-shaped terylene pre-oriented yarn is basically the same as that of the embodiment 1, and the difference is that: the secondary pre-network adopts air pressure of 0.1 MPa.
The specifications of the finally prepared soft light special-shaped terylene pre-oriented yarn are the same as those of the embodiment 1, and the cross-sectional shape of the monofilament is the same as that of the embodiment 1; the titanium dioxide content of the soft profiled polyester pre-oriented yarns is the same as that of example 1; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.18cN/dtex, the breaking strength variation coefficient CV value is 2.58%, the breaking elongation is 120.7%, the breaking elongation variation coefficient CV value is 3.19%, the evenness CV value is 1.36%, the actual oil content is 0.60%, and the percentage of the actual oil content of the soft light special-shaped polyester pre-oriented yarn to the theoretical oil content is 93.1%; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 6, the number of times of the broken yarn phenomenon generated is 3, and the degree of networking is 8/m.
As can be seen from comparing example 1 with comparative example 5, the soft profiled polyester pre-oriented yarn of comparative example 5 produced network nodes because the secondary pre-network air pressure of comparative example 5 was too high, which easily caused the polyester pre-oriented yarn to produce "network nodes", while the polyester pre-oriented yarn did not require network degree.
Example 2
A manufacturing method of soft light special-shaped terylene pre-oriented yarn comprises the following process flow of A part, B part and C part, wherein A part is as follows: slurry preparation, first esterification, second esterification, pre-polycondensation and final polycondensation; the part B is as follows: masterbatch drying, screw extrusion injection and filtering; the part C is as follows: dynamic mixer, melt conveying, metering pump, spinneret plate extrusion, cooling forming, cluster oiling, primary pre-networking, first godet, secondary pre-networking, second godet and winding; the material obtained in the final polycondensation process of the part A and the filtration system process of the part B simultaneously enters the same melt pipeline, and then enters the dynamic mixer process of the part C;
the technological parameters include: the primary pre-networking air pressure is 0.02MPa, the secondary pre-networking air pressure is 0.05MPa, the spinning speed is 2550m/min, the cooling molding air pressure is 48Pa, the air temperature is 20 ℃, the relative humidity is 71%, the concentration of oil agent in the cluster oiling is 13.2wt%, the oil agent pump frequency is 28.7hz, the vertical distance between a nozzle tip used in the cluster oiling and a first pre-networking device used in the primary pre-networking is 21cm, and the included angle A between the connecting line of the nozzle tip used in the cluster oiling and the first pre-networking device used in the primary pre-networking and the vertical direction is 11 degrees.
The specification of the finally prepared soft light special-shaped terylene pre-oriented yarn is flat 210dtex/192f, and the cross section of the monofilament is flat in a straight shape; the content of titanium dioxide in the soft profiled polyester pre-oriented yarns is 2.2wt%; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.26cN/dtex, the breaking strength variation coefficient CV value is 2.43%, the breaking elongation is 120.5%, the breaking elongation variation coefficient CV value is 2.09%, the evenness CV value is 1.19%, the actual oil content is 0.64%, and the percentage of the actual oil content of the soft light special-shaped polyester pre-oriented yarn to the theoretical oil content is 92.8%; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 5, and the number of times of the broken yarn phenomenon generated is 0.
Example 3
A manufacturing method of soft light special-shaped terylene pre-oriented yarn comprises the following process flow of A part, B part and C part, wherein A part is as follows: slurry preparation, first esterification, second esterification, pre-polycondensation and final polycondensation; the part B is as follows: masterbatch drying, screw extrusion injection and filtering; the part C is as follows: dynamic mixer, melt conveying, metering pump, spinneret plate extrusion, cooling forming, cluster oiling, primary pre-networking, first godet, secondary pre-networking, second godet and winding; the material obtained in the final polycondensation process of the part A and the filtration system process of the part B simultaneously enters the same melt pipeline, and then enters the dynamic mixer process of the part C;
The technological parameters include: the primary pre-networking air pressure is 0.03MPa, the secondary pre-networking air pressure is 0.06MPa, the spinning speed is 2600m/min, the cooling molding air pressure is 49Pa, the air temperature is 21 ℃, the relative humidity is 72%, the concentration of oil agent in the cluster oiling is 13.4wt%, the oil agent pump frequency is 28.9hz, the vertical distance between a nozzle used in the cluster oiling and a first pre-networking device used in the primary pre-networking is 22cm, and the included angle A between the connecting line of the nozzle used in the cluster oiling and the first pre-networking device used in the primary pre-networking and the vertical direction is 12 degrees.
The specification of the finally prepared soft light special-shaped terylene pre-oriented yarn is flat 218dtex/192f, and the cross section of the monofilament is flat in a straight shape; the content of titanium dioxide in the soft profiled polyester pre-oriented yarns is 2.3wt%; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.29cN/dtex, the breaking strength variation coefficient CV value is 1.28%, the breaking elongation is 119.4%, the breaking elongation variation coefficient CV value is 2.17%, the evenness CV value is 1.25%, the actual oil content is 0.66%, and the percentage of the actual oil content of the soft light special-shaped polyester pre-oriented yarn to the theoretical oil content is 94.6%; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 2, and the number of times of the broken yarn phenomenon generated is 3.
Example 4
A manufacturing method of soft light special-shaped terylene pre-oriented yarn comprises the following process flow of A part, B part and C part, wherein A part is as follows: slurry preparation, first esterification, second esterification, pre-polycondensation and final polycondensation; the part B is as follows: masterbatch drying, screw extrusion injection and filtering; the part C is as follows: dynamic mixer, melt conveying, metering pump, spinneret plate extrusion, cooling forming, cluster oiling, primary pre-networking, first godet, secondary pre-networking, second godet and winding; the material obtained in the final polycondensation process of the part A and the filtration system process of the part B simultaneously enters the same melt pipeline, and then enters the dynamic mixer process of the part C;
the technological parameters include: the primary pre-networking air pressure is 0.03MPa, the secondary pre-networking air pressure is 0.07MPa, the spinning speed is 2700m/min, the cooling molding air pressure is 50Pa, the air temperature is 22 ℃, the relative humidity is 73%, the concentration of oil agent in the cluster oiling is 13.5wt%, the oil agent pump frequency is 29hz, the vertical distance between a nozzle used in the cluster oiling and a first pre-networking device used in the primary pre-networking is 23cm, and the included angle A between the connecting line of the nozzle used in the cluster oiling and the first pre-networking device used in the primary pre-networking and the vertical direction is 13 degrees.
The specification of the finally prepared soft light special-shaped terylene pre-oriented yarn is flat 218dtex/192f, and the cross section of the monofilament is flat in a straight shape; the content of titanium dioxide in the soft profiled polyester pre-oriented yarns is 2.5wt%; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.25cN/dtex, the breaking strength variation coefficient CV value is 2.28%, the breaking elongation is 120.6%, the breaking elongation variation coefficient CV value is 2.73%, the evenness CV value is 1.22%, the actual oil content is 0.65%, and the percentage of the actual oil content of the soft light special-shaped polyester pre-oriented yarn to the theoretical oil content is 93.8%; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 0, and the number of times of the broken yarn phenomenon generated is 2.
Example 5
A manufacturing method of soft light special-shaped terylene pre-oriented yarn comprises the following process flow of A part, B part and C part, wherein A part is as follows: slurry preparation, first esterification, second esterification, pre-polycondensation and final polycondensation; the part B is as follows: masterbatch drying, screw extrusion injection and filtering; the part C is as follows: dynamic mixer, melt conveying, metering pump, spinneret plate extrusion, cooling forming, cluster oiling, primary pre-networking, first godet, secondary pre-networking, second godet and winding; the material obtained in the final polycondensation process of the part A and the filtration system process of the part B simultaneously enters the same melt pipeline, and then enters the dynamic mixer process of the part C;
The technological parameters include: the primary pre-networking air pressure is 0.04MPa, the secondary pre-networking air pressure is 0.08MPa, the spinning speed is 2800m/min, the cooling molding air pressure is 51Pa, the air temperature is 23 ℃, the relative humidity is 74%, the concentration of the oil agent in the cluster oiling is 13.6wt%, the oil agent pump frequency is 29.2hz, the vertical distance between the oil nozzle used in the cluster oiling and the first pre-networking device used in the primary pre-networking is 24cm, and the included angle A between the connecting line of the oil nozzle used in the cluster oiling and the first pre-networking device used in the primary pre-networking and the vertical direction is 14 degrees.
The specification of the finally prepared soft light special-shaped terylene pre-oriented yarn is flat 220dtex/192f, and the cross section of the monofilament is flat in a straight shape; the content of titanium dioxide in the soft profiled polyester pre-oriented yarns is 2.4 weight percent; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.22cN/dtex, the breaking strength variation coefficient CV value is 2.23%, the breaking elongation is 120.0%, the breaking elongation variation coefficient CV value is 2.11%, the evenness CV value is 1.17%, the actual oil content is 0.67%, and the percentage of the actual oil content of the soft light special-shaped polyester pre-oriented yarn to the theoretical oil content is 93.4%; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 3, and the number of times of the broken yarn phenomenon generated is 4.
Example 6
A manufacturing method of soft light special-shaped terylene pre-oriented yarn comprises the following process flow of A part, B part and C part, wherein A part is as follows: slurry preparation, first esterification, second esterification, pre-polycondensation and final polycondensation; the part B is as follows: masterbatch drying, screw extrusion injection and filtering; the part C is as follows: dynamic mixer, melt conveying, metering pump, spinneret plate extrusion, cooling forming, cluster oiling, primary pre-networking, first godet, secondary pre-networking, second godet and winding; the material obtained in the final polycondensation process of the part A and the filtration system process of the part B simultaneously enters the same melt pipeline, and then enters the dynamic mixer process of the part C;
the technological parameters include: the primary pre-networking air pressure is 0.05MPa, the secondary pre-networking air pressure is 0.09MPa, the spinning speed is 2900m/min, the cooling molding air pressure is 52Pa, the air temperature is 24 ℃, the relative humidity is 75%, the concentration of the oil agent in the cluster oiling is 13.8wt%, the oil agent pump frequency is 29.4hz, the vertical distance between the oil nozzle used in the cluster oiling and the first pre-networking device used in the primary pre-networking is 25cm, and the included angle A between the connecting line of the oil nozzle used in the cluster oiling and the first pre-networking device used in the primary pre-networking and the vertical direction is 15 degrees.
The specification of the finally prepared soft light special-shaped terylene pre-oriented yarn is flat 280dtex/288f, and the cross section of the monofilament is flat in a straight shape; the content of titanium dioxide in the soft profiled polyester pre-oriented yarns is 2.3wt%; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.28cN/dtex, the breaking strength variation coefficient CV value is 2.07%, the breaking elongation is 121.5%, the breaking elongation variation coefficient CV value is 2.3%, the evenness CV value is 1.1%, the actual oil content is 0.67%, and the percentage of the actual oil content of the soft light special-shaped polyester pre-oriented yarn to the theoretical oil content is 92.4%; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 5, and the number of times of the broken yarn phenomenon generated is 0.
Example 7
A manufacturing method of soft light special-shaped terylene pre-oriented yarn comprises the following process flow of A part, B part and C part, wherein A part is as follows: slurry preparation, first esterification, second esterification, pre-polycondensation and final polycondensation; the part B is as follows: masterbatch drying, screw extrusion injection and filtering; the part C is as follows: dynamic mixer, melt conveying, metering pump, spinneret plate extrusion, cooling forming, cluster oiling, primary pre-networking, first godet, secondary pre-networking, second godet and winding; the material obtained in the final polycondensation process of the part A and the filtration system process of the part B simultaneously enters the same melt pipeline, and then enters the dynamic mixer process of the part C;
The technological parameters include: the primary pre-networking air pressure is 0.05MPa, the secondary pre-networking air pressure is 0.09MPa, the spinning speed is 3000m/min, the cooling molding air pressure is 53Pa, the air temperature is 24 ℃, the relative humidity is 76%, the concentration of oil agent in the cluster oiling is 14wt%, the oil agent pump frequency is 29.5hz, the vertical distance between a nozzle used in the cluster oiling and a first pre-networking device used in the primary pre-networking is 26cm, and the included angle A between the connecting line of the nozzle used in the cluster oiling and the first pre-networking device used in the primary pre-networking and the vertical direction is 16 degrees.
The specification of the finally prepared soft light special-shaped terylene pre-oriented yarn is flat 288dtex/288f, and the cross section of the monofilament is flat in a straight shape; the content of titanium dioxide in the soft profiled polyester pre-oriented yarns is 2.4 weight percent; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.27cN/dtex, the breaking strength variation coefficient CV value is 2.22%, the breaking elongation is 121.6%, the breaking elongation variation coefficient CV value is 2.76%, the evenness CV value is 1.12%, the actual oil content is 0.69%, and the percentage of the actual oil content of the soft light special-shaped polyester pre-oriented yarn to the theoretical oil content is 94.5%; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 2, and the number of times of the broken yarn phenomenon generated is 3.
Example 8
A manufacturing method of soft light special-shaped terylene pre-oriented yarn comprises the following process flow of A part, B part and C part, wherein A part is as follows: slurry preparation, first esterification, second esterification, pre-polycondensation and final polycondensation; the part B is as follows: masterbatch drying, screw extrusion injection and filtering; the part C is as follows: dynamic mixer, melt conveying, metering pump, spinneret plate extrusion, cooling forming, cluster oiling, primary pre-networking, first godet, secondary pre-networking, second godet and winding; the material obtained in the final polycondensation process of the part A and the filtration system process of the part B simultaneously enters the same melt pipeline, and then enters the dynamic mixer process of the part C;
the technological parameters include: the primary pre-networking air pressure is 0.02MPa, the secondary pre-networking air pressure is 0.08MPa, the spinning speed is 3100m/min, the cooling molding air pressure is 49Pa, the air temperature is 22 ℃, the relative humidity is 72%, the concentration of oil agent in the cluster oiling is 13.5wt%, the oil agent pump frequency is 29.2hz, the vertical distance between a nozzle used in the cluster oiling and a first pre-networking device used in the primary pre-networking is 27cm, and the included angle A between the connecting line of the nozzle used in the cluster oiling and the first pre-networking device used in the primary pre-networking and the vertical direction is 17 degrees.
The specification of the finally prepared soft light special-shaped terylene pre-oriented yarn is flat 288dtex/288f, and the cross section of the monofilament is flat in a straight shape; the content of titanium dioxide in the soft profiled polyester pre-oriented yarns is 2.3wt%; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.28cN/dtex, the breaking strength variation coefficient CV value is 2.19%, the breaking elongation is 120.6%, the breaking elongation variation coefficient CV value is 2.72%, the evenness CV value is 1.13%, the actual oil content is 0.67%, and the percentage of the actual oil content of the soft light special-shaped polyester pre-oriented yarn to the theoretical oil content is 96.1%; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 6, and the number of times of the broken yarn phenomenon generated is 1.
Example 9
A manufacturing method of soft light special-shaped terylene pre-oriented yarn comprises the following process flow of A part, B part and C part, wherein A part is as follows: slurry preparation, first esterification, second esterification, pre-polycondensation and final polycondensation; the part B is as follows: masterbatch drying, screw extrusion injection and filtering; the part C is as follows: dynamic mixer, melt conveying, metering pump, spinneret plate extrusion, cooling forming, cluster oiling, primary pre-networking, first godet, secondary pre-networking, second godet and winding; the material obtained in the final polycondensation process of the part A and the filtration system process of the part B simultaneously enters the same melt pipeline, and then enters the dynamic mixer process of the part C;
The technological parameters include: the primary pre-networking air pressure is 0.03MPa, the secondary pre-networking air pressure is 0.09MPa, the spinning speed is 3200m/min, the cooling molding air pressure is 50Pa, the air temperature is 21 ℃, the relative humidity is 73%, the concentration of oil agent in the cluster oiling is 13.4wt%, the oil agent pump frequency is 29.3hz, the vertical distance between a nozzle tip used in the cluster oiling and a first pre-networking device used in the primary pre-networking is 28cm, and the included angle A between the connecting line of the nozzle tip used in the cluster oiling and the first pre-networking device used in the primary pre-networking and the vertical direction is 18 degrees.
The specification of the finally prepared soft light special-shaped terylene pre-oriented yarn is flat 288dtex/288f, and the cross section of the monofilament is flat in a straight shape; the content of titanium dioxide in the soft profiled polyester pre-oriented yarns is 2.3wt%; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.27cN/dtex, the breaking strength variation coefficient CV value is 1.38%, the breaking elongation is 121.7%, the breaking elongation variation coefficient CV value is 1.53%, the evenness CV value is 1.07%, the actual oil content is 0.68%, and the actual oil content of the soft light special-shaped polyester pre-oriented yarn accounts for 93.4% of the theoretical oil content; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 4, and the number of times of the broken yarn phenomenon generated is 4.
Example 10
A manufacturing method of soft light special-shaped terylene pre-oriented yarn comprises the following process flow of A part, B part and C part, wherein A part is as follows: slurry preparation, first esterification, second esterification, pre-polycondensation and final polycondensation; the part B is as follows: masterbatch drying, screw extrusion injection and filtering; the part C is as follows: dynamic mixer, melt conveying, metering pump, spinneret plate extrusion, cooling forming, cluster oiling, primary pre-networking, first godet, secondary pre-networking, second godet and winding; the material obtained in the final polycondensation process of the part A and the filtration system process of the part B simultaneously enters the same melt pipeline, and then enters the dynamic mixer process of the part C;
the technological parameters include: the primary pre-networking air pressure is 0.04MPa, the secondary pre-networking air pressure is 0.07MPa, the spinning speed is 3300m/min, the cooling molding air pressure is 50Pa, the air temperature is 22 ℃, the relative humidity is 72%, the concentration of the oil agent in the cluster oiling is 13.6wt%, the oil agent pump frequency is 29.3hz, the vertical distance between the oil nozzle used in the cluster oiling and the first pre-networking device used in the primary pre-networking is 29cm, and the included angle A between the connecting line of the oil nozzle used in the cluster oiling and the first pre-networking device used in the primary pre-networking and the vertical direction is 19 DEG cm.
The specification of the finally prepared soft light special-shaped terylene pre-oriented yarn is flat 288dtex/288f, and the cross section of the monofilament is flat in a straight shape; the content of titanium dioxide in the soft profiled polyester pre-oriented yarns is 2.2wt%; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.33cN/dtex, the breaking strength variation coefficient CV value is 2.4%, the breaking elongation is 121%, the breaking elongation variation coefficient CV value is 2.24%, the evenness CV value is 1.11%, the actual oil content is 0.64%, and the actual oil content of the soft light special-shaped polyester pre-oriented yarn accounts for 94.1% of the theoretical oil content; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 2, and the number of times of the broken yarn phenomenon generated is 4.
Example 11
A manufacturing method of soft light special-shaped terylene pre-oriented yarn comprises the following process flow of A part, B part and C part, wherein A part is as follows: slurry preparation, first esterification, second esterification, pre-polycondensation and final polycondensation; the part B is as follows: masterbatch drying, screw extrusion injection and filtering; the part C is as follows: dynamic mixer, melt conveying, metering pump, spinneret plate extrusion, cooling forming, cluster oiling, primary pre-networking, first godet, secondary pre-networking, second godet and winding; the material obtained in the final polycondensation process of the part A and the filtration system process of the part B simultaneously enters the same melt pipeline, and then enters the dynamic mixer process of the part C;
The technological parameters include: the primary pre-networking air pressure is 0.05MPa, the secondary pre-networking air pressure is 0.05MPa, the spinning speed is 3400m/min, the cooling molding air pressure is 51Pa, the air temperature is 23 ℃, the relative humidity is 75%, the concentration of the oil agent in the cluster oiling is 13.5wt%, the oil agent pump frequency is 29.0hz, the vertical distance between the oil nozzle used in the cluster oiling and the first pre-networking device used in the primary pre-networking is 30cm, and the included angle A between the connecting line of the oil nozzle used in the cluster oiling and the first pre-networking device used in the primary pre-networking and the vertical direction is 20 degrees.
The specification of the finally prepared soft light special-shaped terylene pre-oriented yarn is flat 288dtex/288f, and the cross section of the monofilament is flat in a straight shape; the content of titanium dioxide in the soft profiled polyester pre-oriented yarns is 2.2wt%; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.24cN/dtex, the breaking strength variation coefficient CV value is 2.17%, the breaking elongation is 121.3%, the breaking elongation variation coefficient CV value is 1.97%, the evenness CV value is 1.21%, the actual oil content is 0.65%, and the percentage of the actual oil content of the soft light special-shaped polyester pre-oriented yarn to the theoretical oil content is 93.7%; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 3, and the number of times of the broken yarn phenomenon generated is 2.
Example 12
A manufacturing method of soft light special-shaped terylene pre-oriented yarn comprises the following process flow of A part, B part and C part, wherein A part is as follows: slurry preparation, first esterification, second esterification, pre-polycondensation and final polycondensation; the part B is as follows: masterbatch drying, screw extrusion injection and filtering; the part C is as follows: dynamic mixer, melt conveying, metering pump, spinneret plate extrusion, cooling forming, cluster oiling, primary pre-networking, first godet, secondary pre-networking, second godet and winding; the material obtained in the final polycondensation process of the part A and the filtration system process of the part B simultaneously enters the same melt pipeline, and then enters the dynamic mixer process of the part C;
the technological parameters include: the primary pre-networking air pressure is 0.05MPa, the secondary pre-networking air pressure is 0.08MPa, the spinning speed is 3500m/min, the cooling molding air pressure is 51Pa, the air temperature is 22 ℃, the relative humidity is 73%, the concentration of oil agent in the cluster oiling is 13.8wt%, the oil agent pump frequency is 29.1hz, the vertical distance between a nozzle used in the cluster oiling and a first pre-networking device used in the primary pre-networking is 25cm, and the included angle A between the connecting line of the nozzle used in the cluster oiling and the first pre-networking device used in the primary pre-networking and the vertical direction is 12 degrees.
The specification of the finally prepared soft light special-shaped terylene pre-oriented yarn is flat 288dtex/288f, and the cross section of the monofilament is flat in a straight shape; the content of titanium dioxide in the soft profiled polyester pre-oriented yarns is 2.2wt%; the breaking strength of the soft light special-shaped polyester pre-oriented yarn is 2.29cN/dtex, the breaking strength variation coefficient CV value is 1.96%, the breaking elongation is 120.6%, the breaking elongation variation coefficient CV value is 2.24%, the evenness CV value is 1.17%, the actual oil content is 0.64%, and the percentage of the actual oil content of the soft light special-shaped polyester pre-oriented yarn to the theoretical oil content is 94.5%; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 2, and the number of times of the broken yarn phenomenon generated is 3.

Claims (7)

1. The manufacturing method of the soft light special-shaped polyester pre-oriented yarn is characterized by comprising a C part, wherein the C part is as follows: dynamic mixer, melt conveying, metering pump, spinneret plate extrusion, cooling forming, cluster oiling, primary pre-networking, first godet, secondary pre-networking, second godet and winding;
the vertical distance between the oil nozzle used for the cluster oiling and the first pre-networking device used for the primary pre-networking is 20-30cm, and the included angle A between the connecting line of the oil nozzle used for the cluster oiling and the first pre-networking device used for the primary pre-networking and the vertical direction is 10-20 degrees;
The primary pre-network adopts air pressure of 0.02-0.05 MPa;
the secondary pre-network adopts air pressure of 0.05-0.09 MPa;
the distance between the first godet and the second godet is 100-150cm;
the process flow also comprises a part A and a part B, wherein the part A is as follows: slurry preparation, first esterification, second esterification, pre-polycondensation and final polycondensation, wherein part B is as follows: masterbatch drying, screw extrusion injection and filtering;
wherein, the materials obtained in the final polycondensation process of the part A and the filtration system process of the part B enter the same melt pipeline at the same time, and then enter the dynamic mixer process of the part C;
the linear density of the soft light special-shaped polyester pre-oriented yarn is 210-288dtex, the number of monofilaments is 192-288, the fineness of the monofilaments is 0.9-1dpf, the actual oil content of the soft light special-shaped polyester pre-oriented yarn is 0.58-0.69%, and the percentage of the actual oil content of the soft light special-shaped polyester pre-oriented yarn to the theoretical oil content is more than or equal to 92.4%.
2. The method for manufacturing the soft profiled polyester pre-oriented yarn according to claim 1, wherein the spinning speed is 2500-3500m/min.
3. The method for producing a soft profiled polyester pre-oriented yarn according to claim 1, wherein the cross-sectional shape of the monofilament is a straight flat type.
4. The method for manufacturing the soft profiled polyester pre-oriented yarn according to claim 1, wherein the content of titanium dioxide in the soft profiled polyester pre-oriented yarn is 2.2-2.5wt%.
5. The method for manufacturing the soft profiled polyester pre-oriented yarn according to claim 1, wherein the wind pressure for cooling molding is 50+/-3 Pa, the wind temperature is 22+/-2 ℃, and the relative humidity is more than or equal to 70%.
6. The method for manufacturing the soft profiled polyester pre-oriented yarn according to claim 1, wherein the concentration of the oiling agent in the cluster is 13.5+/-0.5 wt% and the frequency of the oiling agent pump is 29+/-0.5 hz.
7. The soft light special-shaped polyester pre-oriented yarn prepared by the method for preparing the soft light special-shaped polyester pre-oriented yarn according to any one of claims 1-6, wherein the breaking strength of the soft light special-shaped polyester pre-oriented yarn is more than or equal to 2.1cN/dtex, the breaking strength variation coefficient CV value is less than or equal to 3.0%, the breaking elongation is 120+/-3%, the breaking elongation variation coefficient CV value is less than or equal to 4.0%, and the bar unevenness CV value is less than or equal to 1.3%; the number of times of the loose yarn phenomenon generated in the 18 spinning positions for 24 hours is 0-6, and the number of times of the broken yarn phenomenon generated is 0-4.
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