CN109943892B - Production process of superfine denier direct-spinning full-dull polyester filament yarn - Google Patents
Production process of superfine denier direct-spinning full-dull polyester filament yarn Download PDFInfo
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- 238000010036 direct spinning Methods 0.000 title claims abstract description 13
- 238000009987 spinning Methods 0.000 claims abstract description 59
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- 238000000034 method Methods 0.000 claims abstract description 26
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 20
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000012805 post-processing Methods 0.000 claims abstract description 20
- DCXXMTOCNZCJGO-UHFFFAOYSA-N tristearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCCCC DCXXMTOCNZCJGO-UHFFFAOYSA-N 0.000 claims abstract description 20
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- 239000004408 titanium dioxide Substances 0.000 claims abstract description 12
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920002522 Wood fibre Polymers 0.000 claims abstract description 10
- NOZAQBYNLKNDRT-UHFFFAOYSA-N [diacetyloxy(ethenyl)silyl] acetate Chemical compound CC(=O)O[Si](OC(C)=O)(OC(C)=O)C=C NOZAQBYNLKNDRT-UHFFFAOYSA-N 0.000 claims abstract description 10
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- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 7
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 claims abstract description 7
- 239000000835 fiber Substances 0.000 claims description 30
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Abstract
The invention discloses a production process of superfine denier direct-spinning full-dull polyester filament yarn, which adopts a special raw material ratio and comprises the following steps: polyethylene glycol terephthalate, cellulose acetate butyrate, wood fiber powder, titanium dioxide, vinyl triacetoxysilane, sulfuric acid, calcium nitrate, dimethylethanolamine, glyceryl tristearate and bis-diisopropyl titanate are subjected to a series of processes of polymerization, pressurization, spinning, oiling and post-processing to obtain the polyester filament yarn, the polyester filament yarn is soft in hand feeling, soft in luster, bright in color and good in fabric draping feeling, can be widely applied to high-grade clothes and high-grade blankets, and overcomes the defect that TiO (titanium oxide) is used2The filament has good extinction effect and good spinnability.
Description
Technical Field
The invention belongs to the technical field of chemical fibers, and particularly relates to a production process of superfine denier direct-spinning full-dull polyester filament yarn.
Background
The full-dull fabric developed by the full-dull filament yarn has soft hand feeling, soft luster, bright color, good draping feeling of the fabric and larger market demand. People have higher pursuit on the functionality, hand feeling and appearance style of the polyester fiber, and the full-dull polyester fiber is also popular among people. Full-dull products are widely preferred because of their unique styling. The method mainly shows that the luster is soft, the color is bright, the drapability of the fabric is good, the domestic development of full-dull varieties mainly focuses on the aspects of viscose fiber, polyester staple fiber and the like, and the production and processing technology of polyester filament yarn still needs to be perfected and improved.
Because the conventional terylene has regular shape and obvious reflection and flicker phenomena, in order to eliminate the phenomenon, the fiber has extinction effect, people manufacture full-extinction terylene in various modes, the processing performance of full-extinction terylene filament is greatly different from other products because of adding a large amount of titanium dioxide inorganic particles, the quality and the processing efficiency of final products are influenced to different degrees because of different performances of intermediate products in various stages, and the quality and the processing efficiency of the final products are influenced to different degrees because of the fact that the intermediate products in various stages have different performancesThe full-dull polyester filament yarn is added with high-content TiO2The properties of the melt change greatly, so TiO2The precision of the injection amount and the dispersibility in the semi-dull melt determine the quality of the full-dull melt, and further influence the quality of the final product.
At present, the types of full-dull polyester filaments on the market are more, but the full-dull polyester filaments specially used for high-grade blankets and high-grade men and women clothes are few, and the full-dull polyester filaments specially used for the high-grade blankets have higher requirements on various aspects such as color and luster, cotton sensitivity and the like, and the problems of low unwinding performance and non-uniform color absorption performance in product processing, namely TiO is not added in the prior art, because the full-dull polyester filaments specially used for the high-grade blankets have large specific surface area, the full-dull polyester filaments specially used for the high-grade blankets have low requirements on various2While adding H3PO4The stabilizer increases the control difficulty of the subsequent spinning process, and has a series of problems of poor dyeing uniformity, poor unwinding performance, insufficient reaction between raw materials and the like.
Disclosure of Invention
The invention provides a production process of superfine denier direct-spinning full-dull polyester filament yarn, which is specially applied to high-grade clothes and high-grade blankets and solves the problems of poor dyeing uniformity, poor air permeability, poor unwinding performance and the like of superfine denier porous yarn produced in the prior art.
The specific technical scheme is as follows:
a production process of superfine denier direct-spinning full-dull polyester filament yarn comprises the following steps:
1) adding raw materials into a polymerization reaction device, generating a polyester melt under the action of a catalyst, introducing the full-extinction polyester melt into a heat exchanger through a heat-insulation conveying pipeline for heat exchange, and pressurizing through a booster pump to reach the pre-pump pressure required by spinning;
2) keeping the temperature of the pressurized full-dull polyester melt, conveying the full-dull polyester melt into a spinning box through an outer pipeline of the box, measuring the full-dull polyester melt through a spinning metering pump at the spinning box temperature of 289-291 ℃, and uniformly distributing the full-dull polyester melt into a spinning assembly through an inner pipeline of the box;
3) the sand loading amount of the full-dull polyester melt in the spinning assembly entering the metal sand assembly is 60-80H/150 g and 40-60 meshes/120 g;
4) the spinneret plate is 0.54mm in length from the spinneret plate at the bottom of the spinning assembly, the fiber is formed by high-pressure spraying, the fiber is cooled and formed under the condition of outer ring blowing, the outer ring blowing is adopted for cooling, and the air pressure is 25-28 Pa;
5) and (3) bundling and oiling the cooled and formed filament bundles, wherein the height of an oil nozzle is 700mm, the oiling rate is 0.45%, and then performing post-processing to obtain the finished product of the full-dull polyester filament yarn.
Preferably, the raw materials comprise: polyethylene terephthalate, cellulose acetate butyrate, wood fiber powder, titanium dioxide, vinyl triacetoxysilane, sulfuric acid, calcium nitrate, dimethylethanolamine, glyceryl tristearate and bis-diisopropyl titanate.
Preferably, the raw materials are mixed before being fed into the polymerization reaction device by the following method: A. mixing polyethylene glycol terephthalate, cellulose acetate butyrate and bis-diisopropyl titanate for 10-15 minutes; B. then dissolving dimethylethanolamine, glyceryl tristearate and vinyl triacetoxysilane in water, adding sulfuric acid, mixing uniformly, and performing electrolytic treatment for 15-20 s; C. the mixture obtained in step A, B was mixed with wood fiber powder, titanium dioxide, calcium nitrate, sonicated, and then exposed to UV radiation for 15-30 seconds.
Preferably, the power of the ultrasonic wave is 50-150W, the frequency is 50-100KHz, and the reaction time is 0.5-1.5 hours.
Preferably, the post-processing steps are: and (3) enabling the cooled and formed filament bundle to sequentially pass through a raw filament frame, a first roller, a twist stopper, a texturing hot box, a cooling plate, a false twister, a second roller, a network nozzle, a setting hot box, a third roller and a oiling wheel, and then winding and forming to obtain the full-dull polyester filament.
Preferably, the tow is heat treated at 180 to 200 ℃ after passing through the network nozzle, and then subjected to a relaxation heat treatment at a relaxation rate of 5 to 15%.
Preferably, the TiO is2Is added in a proportion of2.5％-3.0％。
Preferably, the cross section of the polyester filament yarn is circular.
Preferably, the processing speed of the post-processing is 680 m/min.
Preferably, the D/Y value of the process is 1.65.
Has the advantages that:
1. the production process of the superfine denier direct-spinning full-dull polyester filament yarn is produced by adopting a melt direct-spinning technology, has soft hand feeling, soft luster, bright color and good fabric draping feeling, and can be widely applied to high-grade clothes and high-grade blankets.
2. Because of the high content of TiO in the full extinction tow2The tensile property and the internal structure uniformity of the strand silk are poorer than those of the semi-dull fiber, so the technological parameters set in the invention have synergistic effect, and the obtained filament has good performance; the spinning temperature of the spinning box body is 289-291 ℃; the sand loading of the metal sand component is 60-80H/150 g, 40-60 meshes/120 g; the length of the spinneret plate is 0.54mm, and under the length, the subsequent tows can meet the production requirement, and the cost can be saved; the height of the oil nozzle is 700mm, the oiling rate is 0.45%, and the specific height and the oiling rate of the oil nozzle are adopted, so that static electricity can be effectively eliminated, and cohesive force is enhanced.
3. Because the superfine denier filament has large specific surface area and fast heat dissipation in the spinning process, the solidifying point is sharply moved upwards when the superfine denier filament is spun compared with the conventional variety, and the requirement of steady-state production of the spinning part is met, in order to improve the cooling uniformity of the strand silk of the spinning part, the invention adopts outer ring air blowing cooling, the air pressure is 25-28 Pa, so that the cooling is more uniform, the problem of disordered structural arrangement caused by uneven cooling of other air blowing modes is avoided, the structural arrangement of the fiber silk is more ordered, the internal stress is eliminated, the unevenness of the evenness of the strand is reduced, and the requirement of post-processing is met.
4. Due to TiO2The uneven distribution of the particles in the fiber is easy to cause the inconsistent refractive index of the fiber, and TiO2The higher the content, the better the extinction effect, but the poor spinnability; the invention aims to overcome TiO2The invention is characterized in that the raw materials are added into the polymerization reaction device before being added into the polymerization reaction deviceBy ultrasonic treatment and then exposure to UV radiation, avoiding TiO2The surface charges of the particles are enriched to weaken the Van der Waals electrostatic attraction formed between adjacent particles; meanwhile, after the tows pass through a network nozzle, the tows are subjected to heat treatment at 180-200 ℃, and then subjected to relaxation heat treatment at a relaxation rate of 5-15% to keep proper distance between particles, so that the total surface area and the surface excess free energy are ensured not to be reduced, and TiO is overcome2The filament has good extinction effect and good spinnability.
Detailed Description
The cross section of the polyester filament yarn prepared by the invention is circular; the processing speed of post-processing is 680 m/min; the D/Y value of the processed product was 1.65.
The raw materials comprise: polyethylene terephthalate, cellulose acetate butyrate, wood fiber powder, titanium dioxide, vinyl triacetoxysilane, sulfuric acid, calcium nitrate, dimethylethanolamine, glyceryl tristearate and diisopropyl bistitanate. The raw materials are specially combined, so that the finally obtained polyester filament yarn has good unwinding performance, low friction coefficient and good dyeing uniformity.
The post-processing steps are as follows: and (3) enabling the cooled and formed filament bundle to sequentially pass through a raw filament frame, a first roller, a twist stopper, a texturing hot box, a cooling plate, a false twister, a second roller, a network nozzle, a setting hot box, a third roller and a oiling wheel, and then winding and forming to obtain the full-dull polyester filament.
Example 1:
example TiO2The addition ratio of (2) was 2.8%.
The production process of the superfine denier direct-spinning full-dull polyester filament yarn is characterized by comprising the following steps of:
1) adding raw materials into a polymerization reaction device, generating a polyester melt under the action of a catalyst, introducing the full-dull polyester melt into a heat exchanger through a heat-insulating conveying pipeline for heat exchange, and pressurizing through a booster pump to reach the pre-pump pressure required by spinning;
2) the pressurized full-dull polyester melt is subjected to heat preservation and is conveyed into a spinning box through a pipeline outside the box body, the temperature of the spinning box body is 290 ℃, the full-dull polyester melt is measured by a spinning metering pump and is uniformly distributed into a spinning assembly through a pipeline inside the box body;
3) the sand loading of the full-dull polyester melt in the spinning assembly entering the metal sand assembly is 80H/150g and 60 meshes/120 g;
4) the spinneret plate at the bottom of the spinning assembly is 0.54mm in length, the fiber is formed by high-pressure spraying, the fiber is cooled and formed under the condition of outer ring blowing, the outer ring blowing is adopted for cooling, and the air pressure is 25 Pa;
5) and (3) bundling and oiling the cooled and formed filament bundles, wherein the height of an oil nozzle is 700mm, the oiling rate is 0.45%, and then performing post-processing to obtain the finished product of the full-dull polyester filament yarn.
The raw material mixing method comprises the following steps: A. mixing polyethylene glycol terephthalate, cellulose acetate butyrate and bis-diisopropyl titanate for 10 minutes; B. then dissolving dimethylethanolamine, tristearin and vinyl triacetoxysilane in water, adding sulfuric acid, mixing uniformly, and carrying out electrolytic treatment for 18 s; C. mixing the mixture obtained in the step A, B with wood fiber powder, titanium dioxide and calcium nitrate, performing ultrasonic treatment with the power of 50W, the frequency of 80KHz and the reaction time of 1.0 hour, and then exposing to UV radiation for 18 s.
In the post-processing, the tow is subjected to heat treatment at 180 ℃ after passing through a network nozzle, and then subjected to relaxation heat treatment at a relaxation rate of 10%.
Example 2:
example TiO2The addition ratio of (2) was 2.9%.
The production process of the superfine denier direct-spinning full-dull polyester filament yarn is characterized by comprising the following steps of:
1) adding raw materials into a polymerization reaction device, generating a polyester melt under the action of a catalyst, introducing the full-dull polyester melt into a heat exchanger through a heat-insulating conveying pipeline for heat exchange, and pressurizing through a booster pump to reach the pre-pump pressure required by spinning;
2) the pressurized full-dull polyester melt is subjected to heat preservation and is conveyed into a spinning box through a pipeline outside the box body, the spinning temperature of the spinning box body is 289 ℃, the full-dull polyester melt is measured by a spinning measuring pump and is uniformly distributed into a spinning assembly through a pipeline inside the box body;
3) the sand loading of the full-dull polyester melt in the spinning assembly entering the metal sand assembly is 75H/150 g and 50 meshes/120 g;
4) the spinneret plate at the bottom of the spinning assembly is 0.54mm in length, the fiber is formed by high-pressure spraying, the fiber is cooled and formed under the condition of outer ring blowing, the outer ring blowing is adopted for cooling, and the air pressure is 26 Pa;
5) and (3) bundling and oiling the cooled and formed filament bundles, wherein the height of an oil nozzle is 700mm, the oiling rate is 0.45%, and then performing post-processing to obtain the finished product of the full-dull polyester filament yarn.
The raw material mixing method comprises the following steps: A. mixing polyethylene glycol terephthalate, cellulose acetate butyrate and bis-diisopropyl titanate for 15 minutes; B. then dissolving dimethylethanolamine, tristearin and vinyl triacetoxysilane in water, adding sulfuric acid, mixing uniformly, and performing electrolytic treatment for 20 s; C. mixing the mixture obtained in the step A, B with wood fiber powder, titanium dioxide and calcium nitrate, performing ultrasonic treatment with the power of 90W, the frequency of 100KHz and the reaction time of 1.5 hours, and then exposing to UV radiation for 15 s.
In the post-processing, the tow is subjected to heat treatment at 190 ℃ after passing through a network nozzle, and then subjected to relaxation heat treatment at a relaxation rate of 15%.
Example 3:
example TiO2The addition ratio of (2) was 3.0%.
The production process of the superfine denier direct-spinning full-dull polyester filament yarn is characterized by comprising the following steps of:
1) adding raw materials into a polymerization reaction device, generating a polyester melt under the action of a catalyst, introducing the full-dull polyester melt into a heat exchanger through a heat-insulating conveying pipeline for heat exchange, and pressurizing through a booster pump to reach the pre-pump pressure required by spinning;
2) the pressurized full-dull polyester melt is subjected to heat preservation and is conveyed into a spinning box through a pipeline outside the box body, the spinning temperature of the spinning box body is 291 ℃, the full-dull polyester melt is measured by a spinning metering pump, and the full-dull polyester melt is uniformly distributed into a spinning assembly through a pipeline inside the box body;
3) the sand loading of the full-dull polyester melt in the spinning assembly entering the metal sand assembly is 60H/150 g and 40 meshes/120 g;
4) the spinneret plate at the bottom of the spinning assembly is 0.54mm in length, the fiber is formed by high-pressure spraying, the fiber is cooled and formed under the condition of outer ring blowing, the outer ring blowing is adopted for cooling, and the air pressure is 27 Pa;
5) and (3) bundling and oiling the cooled and formed filament bundles, wherein the height of an oil nozzle is 700mm, the oiling rate is 0.45%, and then performing post-processing to obtain the finished product of the full-dull polyester filament yarn.
The raw material mixing method comprises the following steps: A. mixing polyethylene glycol terephthalate, cellulose acetate butyrate and bis-diisopropyl titanate for 12 minutes; B. then dissolving dimethylethanolamine, tristearin and vinyl triacetoxysilane in water, adding sulfuric acid, mixing uniformly, and carrying out electrolytic treatment for 15 s; C. mixing the mixture obtained in the step A, B with wood fiber powder, titanium dioxide and calcium nitrate, performing ultrasonic treatment with the power of 120W, the frequency of 50KHz and the reaction time of 0.5 h, and then exposing to UV radiation for 30 s.
In the post-processing, the tow was subjected to heat treatment at 195 ℃ after passing through a mesh nozzle, and then subjected to relaxation heat treatment at a relaxation rate of 5%.
Example 4:
example TiO2The addition ratio of (2) was 2.9%.
The production process of the superfine denier direct-spinning full-dull polyester filament yarn is characterized by comprising the following steps of:
1) adding raw materials into a polymerization reaction device, generating a polyester melt under the action of a catalyst, introducing the full-dull polyester melt into a heat exchanger through a heat-insulating conveying pipeline for heat exchange, and pressurizing through a booster pump to reach the pre-pump pressure required by spinning;
2) the pressurized full-dull polyester melt is subjected to heat preservation and is conveyed into a spinning box through a pipeline outside the box body, the spinning temperature of the spinning box body is 291 ℃, the full-dull polyester melt is measured by a spinning metering pump, and the full-dull polyester melt is uniformly distributed into a spinning assembly through a pipeline inside the box body;
3) the sand loading of the full-dull polyester melt in the spinning assembly entering the metal sand assembly is 70H/150 g, and 55 meshes/120 g;
4) the spinneret plate at the bottom of the spinning assembly is 0.54mm in length, the fiber is formed by high-pressure spraying, the fiber is cooled and formed under the condition of outer ring blowing, the outer ring blowing is adopted for cooling, and the air pressure is 28 Pa;
5) and (3) bundling and oiling the cooled and formed filament bundles, wherein the height of an oil nozzle is 700mm, the oiling rate is 0.45%, and then performing post-processing to obtain the finished product of the full-dull polyester filament yarn.
The raw material mixing method comprises the following steps: A. mixing polyethylene glycol terephthalate, cellulose acetate butyrate and bis-diisopropyl titanate for 13 minutes; B. then, dissolving dimethylethanolamine, tristearin and vinyl triacetoxysilane in water, adding sulfuric acid, uniformly mixing, and carrying out electrolytic treatment for 17 s; C. mixing the mixture obtained in the step A, B with wood fiber powder, titanium dioxide and calcium nitrate, performing ultrasonic treatment with the power of 150W, the frequency of 60KHz and the reaction time of 0.8 h, and then exposing to UV radiation for 25 s.
In the post-processing, the tow after passing through the network nozzle was heat-treated at 200 ℃ and then subjected to relaxation heat-treatment at a relaxation rate of 7%.
And (3) performance detection:
first, backing-off performance
In the test of the unwinding performance, an unwinding tester (PPA3) was used for evaluation. In the test results provided by PPA3, the performance factor PPF and the number of broken ends of the spinning cake are used as main evaluation indexes. The number of times of end breakage is visual, the smaller the number of times of end breakage is at a certain testing speed, the better the unwinding performance of the spinning cake is, the data analyzer reads the tension change of the yarn strips in unwinding at the frequency of 500Hz, and the tension data is stored and processed in the form of accumulated tension distribution. After the primary test is finished, the stored data are analyzed, and then the PPF is calculated by integrating the tension distribution characteristics and the tension peak. The test speed was 1500 m/min.
Other parameters and procedures in comparative examples 1 to 4 were the same as in examples 1 to 4, respectively, except that the raw materials were directly fed into the polymerization apparatus; other parameters and procedure of comparative example 5 were the same as example 1 except that the relaxation heat treatment was not performed.
As can be seen from the table above, the polyester filament yarn prepared by the invention has small PPF, which shows that the tension fluctuation of the spinning cake in the unwinding process is small, and the unwinding performance of the spinning cake is represented to be good; in comparative examples 1 to 4, the raw materials were directly added to the reaction apparatus without treatment, the PPF increased and the number of broken ends also increased significantly, which indicates that the polyester filaments prepared according to the present invention have reduced van der waals electrostatic attraction formed between adjacent material molecules and good spinnability; in comparative example 5, the PPF increased without the relaxation heat treatment, and the number of broken ends also increased significantly, resulting in poor spinnability.
Testing the characteristics of two-dimensional and full-dull polyester filament yarns
The full-dull polyester filaments obtained in examples 1 to 4 were measured, and other steps and parameters of comparative examples 1 to 4 were the same as those of examples 1 to 4, respectively, except that the selected raw materials were conventional raw material combinations: polyethylene terephthalate, TiO2. The polyester filament yarn is subjected to intrinsic viscosity, dynamic thermal stress CV value and elongation at break detection, and the experimental results are shown in the following table.
Intrinsic viscosity: the molecular weight of PET directly influences the spinning performance and the physical and mechanical properties of fibers, and if the molecular weight is too low, the viscosity of a melt is reduced too much, the fibers cannot be stretched at a high rate, and the fibers are easy to break in spinning. The intrinsic viscosity is low, and the weight average molecular weight of the characterization polymer is also low; the TiO2 particles are dispersed in the PET slices, so that the regularity of molecules is damaged, the convergence capacity among macromolecules is reduced, and the intrinsic viscosity is reduced.
Elongation at break: for the superfine denier full-dull polyester filament, the elongation at break is between 125 and 135, which shows that the polyester filament has good elongation performance; when the product obtained by adopting the conventional raw material proportion is subjected to the parameter detection, the elongation at break is higher, and the product has poor toughness and is extremely easy to break. The polyester filament yarn obtained by the invention has the elongation at break of between 127 and 130, has good toughness and is not easy to break.
Third, uneven evenness
The evenness rate is an important index of the internal quality of the POY, is directly related to the post-processing performance of the POY, is over high, is easy to generate defects such as stripes, color points and the like in dyeing in the processing process of the DTY, reduces the evenness rate of the full-dull POY, and has important meaning for improving the post-processing performance. The yarn evenness unevenness of the polyester filaments obtained in examples 1 to 4 was measured, and the other process parameters of comparative example 1 were the same as those of example 1 except that the cross-blowing process was used. The results of the measurements are shown in the following table.
As can be seen from the table above, the polyester filament yarn prepared by the invention has lower yarn evenness. Fourthly, friction coefficient and dyeing rate
This experiment measured the coefficient of friction between the filaments of the full dull polyester filaments obtained in examples 1 to 4, and set the comparative example 1, and the parameters and manufacturing method of the comparative example 1 are the same as those of example 1, except that the comparative example 1 is a triangular cross section, and the parameters and manufacturing method of the comparative example 2 are the same as those of example 1, except that the selected raw materials are a combination of conventional raw materials: polyethylene terephthalate, TiO2(ii) a The parameters and fabrication method of comparative example 3 were the same as those of example 1 except that the raw materials were directly charged into the polymerization apparatus. The coefficient of friction results are shown in the table below. The uniformity of the staining was expressed as the first-class yield (M rate) of the staining, and the DTY standard was 150D/288F.
| Examples | TiO2Content (wt.) | Coefficient of friction | M rate/%) |
| Example 1 | 2.8 | 0.164 | 97.4 |
| Example 2 | 2.9 | 0.158 | 98.2 |
| Example 3 | 3.0 | 0.160 | 98.1 |
| Example 4 | 2.9 | 0.162 | 98.4 |
| Comparative example 1 | 2.8 | 0.385 | 91.2 |
| Comparative example 2 | 2.8 | 0.401 | 87.4 |
| Comparative example 3 | 2.8 | 0.517 | 84.3 |
Due to TiO2The surface area of the fibers is reduced by the aggregation on the fiber surface, and the friction coefficient is reduced by the friction contact area of the fibers with each other, but the friction coefficient is reduced by TiO2The aggregation of the polyester fibers can cause uneven dyeing, but the special process and the raw material combination of the invention avoid the defects of full-dull polyester filaments, and the prepared polyester filaments have small friction coefficient, small resistance and good quality, andand the dyeing rate is not influenced, and the problems of uneven diffusion and adsorption of dye molecules on the fiber are avoided.
It is to be understood that the invention is not limited to the specific embodiments described above, but is intended to cover various insubstantial modifications of the inventive process concepts and solutions, or its application to other applications without modification.
Claims (8)
1. A production process of superfine denier direct-spinning full-dull polyester filament yarn is characterized by comprising the following steps: 1) Adding raw materials into a polymerization reaction device, generating a polyester melt under the action of a catalyst, introducing the full-dull polyester melt into a heat exchanger through a heat-insulating conveying pipeline for heat exchange, and pressurizing through a booster pump to reach the pre-pump pressure required by spinning; 2) keeping the temperature of the pressurized full-dull polyester melt, conveying the full-dull polyester melt into a spinning box through an outer pipeline of the box, measuring the full-dull polyester melt through a spinning metering pump at the spinning temperature of 289-291 ℃ of the spinning box, and uniformly distributing the full-dull polyester melt into a spinning assembly through an inner pipeline of the box; 3) the sand loading amount of the full-dull polyester melt in the spinning assembly entering the metal sand assembly is 60-80 meshes/150 g and 40-60 meshes/120 g; 4) The spinneret plate is 0.54mm in length from the spinneret plate at the bottom of the spinning assembly, the fiber is formed by high-pressure spraying, the fiber is cooled and formed under the condition of outer ring blowing, the outer ring blowing is adopted for cooling, and the air pressure is 25-28 Pa; 5) The cooled and formed filament bundles are subjected to bundling and oiling, the height of an oil nozzle is 700mm, the oiling rate is 0.45%, and then the finished product of the full-dull polyester filament is obtained through post-processing;
the raw materials comprise: polyethylene terephthalate, cellulose acetate butyrate, wood fiber powder, titanium dioxide, vinyl triacetoxysilane, sulfuric acid, calcium nitrate, dimethylethanolamine, glyceryl tristearate and bis-diisopropyl titanate;
the raw materials are mixed before being added into a polymerization reaction device, and the mixing method comprises the following steps: A. mixing polyethylene glycol terephthalate, cellulose acetate butyrate and bis-diisopropyl titanate for 10-15 minutes; B. then dissolving dimethylethanolamine, tristearin and vinyl triacetoxysilane in water, adding sulfuric acid, mixing uniformly, and performing electrolytic treatment for 15-20 s; C. the mixture obtained in step A, B was mixed with wood fiber powder, titanium dioxide, calcium nitrate, sonicated, and then exposed to UV radiation for 15-30 seconds.
2. The process for producing superfine denier direct-spun full dull polyester filament yarn according to claim 1, wherein the ultrasonic power is 50-150W, the frequency is 50-100KHz, and the reaction time is 0.5-1.5 hours.
3. The process for producing the superfine denier direct-spun full dull polyester filament yarn according to claim 1, wherein the post-processing steps are as follows: and (3) enabling the cooled and formed filament bundle to sequentially pass through a raw filament frame, a first roller, a twist stopper, a texturing hot box, a cooling plate, a false twister, a second roller, a network nozzle, a setting hot box, a third roller and a oiling wheel, and then winding and forming to obtain the full-dull polyester filament.
4. The process for producing super fine denier direct-spun full dull polyester filament yarn as claimed in claim 3, wherein the filament bundle is subjected to heat treatment at 180 ℃ to 200 ℃ after passing through the mesh nozzle, and then subjected to relaxation heat treatment at a relaxation rate of 5% to 15%.
5. The process for producing super fine denier direct-spun full dull polyester filament yarn according to claim 1, wherein the proportion of titanium dioxide added is 2.5% -3.0%.
6. The process for producing superfine denier direct-spun full dull polyester filament according to claim 1, wherein the cross-section of the polyester filament is circular.
7. The process for producing super fine denier direct-spun full dull polyester filament yarn according to claim 1, wherein the post-processing speed is 680 m/min.
8. The process for producing super fine denier direct-spun full dull polyester filament yarn according to claim 1, wherein the D/Y value of the process is 1.65.
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