CN108914235B - Polyester staple fiber production process - Google Patents
Polyester staple fiber production process Download PDFInfo
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- CN108914235B CN108914235B CN201811002275.3A CN201811002275A CN108914235B CN 108914235 B CN108914235 B CN 108914235B CN 201811002275 A CN201811002275 A CN 201811002275A CN 108914235 B CN108914235 B CN 108914235B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D13/00—Complete machines for producing artificial threads
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/10—Filtering or de-aerating the spinning solution or melt
- D01D1/106—Filtering
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/096—Humidity control, or oiling, of filaments, threads or the like, leaving the spinnerettes
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/16—Physical properties antistatic; conductive
Abstract
The invention relates to the technical field of chemical fiber preparation, and discloses a polyester staple fiber production process, which comprises the steps of carrying out S2 high-temperature drying on a polyester fiber sheet, removing S3 metal impurities, heating and melting S4, filtering S5, distributing an S6 metering pump, carrying out S7 spinning, screening S8, carrying out S9 twice traction, carrying out S10 yarn folding, carrying out S11 pre-shaping, carrying out S12 curling, carrying out S13 yarn cutting, carrying out S14 loose shaping and scattering the S15; the method comprises the following steps of soaking the oil solution in an oil solution tank for 50-60 min before S9 is pulled twice, wherein the chemical compositions of the oil solution in percentage by mass are as follows: 15-25% of laureth sulfate TEA salt, 15-25% of decyl betaine, 40-50% of potassium dodecylbenzenesulfonate, 8-12% of glutamyl amino ethyl indole and 2-8% of hyaluronic acid benzyl ester. The polyester fiber yarns are oiled, and the produced polyester staple fibers have good antistatic performance by using the oiling agent.
Description
Technical Field
The invention relates to the technical field of chemical fiber preparation, in particular to a polyester staple fiber production process.
Background
Polyester fibers, commonly known as "dacron". Is synthetic fiber obtained by spinning polyester formed by polycondensation of organic dibasic acid and dihydric alcohol, and is called PET for short.
The polyester staple fiber is prepared by taking polyester as a raw material, and carrying out slicing, impurity removal, drying, moisture absorption, melt spinning, oiling, winding, balancing, bundling, stretching, curling, loosening, shaping, cutting, packaging and warehousing. The polyester staple fiber has high strength, high durability, high corrosion and mildew resistance and other excellent performance, and may be used widely in high grade clothing, leather product, medical operation, military article, etc.
The terylene molecules have the defects of hydrophobicity, difficult dyeing, easy generation of static electricity, flammability and the like because of highly symmetrical structure and strong rigidity of phenylene bonds. The polyester molecules are combined by covalent bonds, and can not be ionized and transferred with electrons, so that charges are easy to generate and accumulate, and the polyester fibers have few polar groups and high hydrophobicity, so that the charges are difficult to dissipate, and the polyester fibers can generate large static electricity.
During the spinning process of the terylene, because the terylene is easy to attract dust and fly from the air due to electrostatic charge, concentrated dark stains are generated on the fabric; in the wearing process, because static electricity not only adsorbs a large amount of dust, and is easy to stain, the terylene fabric and a human body or the terylene fabrics and other fabrics can be entangled.
Disclosure of Invention
The invention aims to provide a polyester staple fiber production process, which is characterized in that an oiling agent is added before drawing, and the oiling agent comprises the following chemical components in percentage by mass: 15-25% of lauryl alcohol polyether sulfate TEA salt, 15-25% of decyl betaine, 40-50% of potassium dodecyl benzene sulfonate, 8-12% of glutamyl amino ethyl indole and 2-8% of hyaluronic acid benzyl ester, so that the produced polyester staple fiber has good antistatic property.
The technical purpose of the invention is realized by the following technical scheme:
a production process of polyester staple fiber is characterized in that: the polyester fiber sheet is processed by the following steps:
s2: putting the polyester fiber sheet into a rotary drum for high-temperature drying;
s3: removing metal impurities from the polyester fiber sheet subjected to high-temperature drying;
s4: heating and melting the polyester fiber sheet with the metal impurities removed;
s5: filtering the polyester fiber sheet after heating and melting;
s6: introducing the filtered polyester fiber sheet into a metering pump for distribution;
s7: carrying out spinning on the polyester fiber sheet by a metering pump, and changing the polyester fiber sheet into polyester fiber yarns after spinning;
s8: screening the polyester fiber yarns after the yarn spraying, and scraping off the polyester fiber yarns with the diameter of more than 0.1 mm;
s9: drawing the screened polyester fiber yarn twice, heating the drawn polyester fiber yarn in the two drawing processes at the heating temperature of 180 ℃, soaking the drawn polyester fiber yarn in an oil agent groove for 50-60 min before the first drawing, wherein the chemical compositions of all substances of the oil agent are as follows by mass percent: 15-25% of laureth sulfate TEA salt, 15-25% of decyl betaine, 40-50% of potassium dodecylbenzenesulfonate, 8-12% of glutamyl amino ethyl indole and 2-8% of hyaluronic acid benzyl ester;
s10: overlapping the polyester fiber yarns subjected to twice traction;
s11: presetting the polyester fiber yarns after the yarn stacking;
s12: crimping the pre-shaped polyester fiber yarn;
s13: shredding the crimped polyester fiber yarns to form polyester staple fibers;
s14: loosening and shaping the polyester staple fiber after shredding;
s15: scattering the polyester staple fiber after the loose shaping;
and the polyester staple fiber yarn scattered by the S15 is the finished polyester staple fiber.
By adopting the technical scheme, because the polyester fiber is an organic polymer material, chemical bonds in macromolecules are covalent bonds, the polyester fiber can not be ionized, and can not transfer electrons or ions, the polyester fiber has very high surface resistance and bulk resistance, when the polyester fiber is mutually rubbed or the molecules are removed, very high static electricity can be generated, and the higher the resistance is, the slower the static electricity release is. Since the more easily an electrostatic attraction or repulsion is generated. Decyl betaine has isoelectric point, and can freely display anion or cation characteristics by controlling the pH value of the surface of the polyester fiber after penetrating into the polyester fiber molecules, so that the antistatic property is durable; meanwhile, decyl betaine forms an oriented adsorption layer on the surface of the polyester fiber, so that the surface conductivity of the polyester fiber is effectively improved.
The potassium dodecylbenzene sulfonate and water vapor molecules in the air are mutually combined to form a hydrogen bond, so that a polar center is formed on the surface of the polyester fiber; the potassium dodecylbenzene sulfonate and the TEA salt are mutually combined and jointly adsorbed on the surface of the polyester fiber, and the covalent bonds and the hydrogen bonds are mutually staggered to form a continuous film layer, so that the resistance of the surface of the polyester fiber is reduced, and the antistatic effect is achieved. Meanwhile, the multi-molecular layer adsorbed on the surface of the polyester fiber increases the distance between the polyester fiber and a friction object on one hand, reduces the friction electrification amount on the surface of the polyester fiber, and increases the moisture absorption amount on the surface of the polyester fiber and reduces the surface resistivity due to the formation of hydrogen bonds on the other hand, so that static electricity is easy to leak.
The glutamine ethyl indole can improve the fluid lubrication performance of the polyester fiber and reduce the dynamic friction coefficient of the fiber. The glutamyl amino ethyl indole can also improve the bundling property of the polyester fiber and prevent the polyester fiber from moving in the non-axial direction in the processing processes of later drawing, curling and the like. And the glutamine ethyl indole and the potassium dodecyl benzene sulfonate are combined with each other, so that the antistatic property of the potassium dodecyl benzene sulfonate combined with each other is enhanced.
The hyaluronic acid benzyl ester can accelerate the molecular movement of the potassium dodecylbenzenesulfonate, the decyl betaine and the laureth sulfate TEA salt, and enhance the activation energy of the molecular movement, so that chemical bonds are formed more quickly, and the reaction time is accelerated.
As a further improvement of the invention, the S2 high temperature drying process is carried out, the polyester fiber sheet is subjected to a temperature of 130 ℃ to change the moisture in the polyester fiber sheet into water vapor, and then the water vapor is pumped out of the rotary drum by using an air pump.
Because the synthetic raw materials of the polyester fiber are the polyethylene terephthalate and the ethylene glycol, if the moisture is not removed before the polyester fiber is melted, the polyester fiber is hydrolyzed due to the existence of water vapor after the subsequent melting, so that the spinning performance and the fiber quality are influenced; when the temperature of the polyester fiber is raised to 130 ℃, the polyester fiber cannot be melted, but water is changed into water vapor, then the water vapor on the surface of the polyester fiber and among fiber molecules is pumped away by using an air pump, so that the polyester fiber is dried, the subsequent processing of the polyester fiber is ensured, and meanwhile, the crystallinity and the softening point of the polyester fiber sheet can be improved.
As a further improvement of the invention, the S3 metal impurities are removed, a magnetic block is arranged on a discharge port of the rotary drum, and the metal impurities on the polyester fiber sheet are adsorbed by the magnetic block, so that the metal impurities on the polyester fiber sheet are removed.
By adopting the technical scheme, as the polyester fiber is heated to 130 ℃, the polyester fiber is correspondingly softened, some metal impurities attached to the polyester fiber are easy to fall off, the magnetic block is arranged on the discharge port of the rotary drum, and the metal impurities on the polyester fiber are adsorbed by the magnetic block, so that the quality of the polyester fiber after subsequent processing is improved.
As a further improvement of the present invention, the step S4 is heating and melting, conveying the polyester fiber sheet from which the metal impurities are removed into a screw extruder, and adjusting the temperature in the screw extruder to 300 ℃ to melt the polyester fiber sheet into a molten state.
By adopting the technical scheme, the polyester fiber is melted when the temperature reaches 300 ℃, so that the spinning is convenient, and the fluidity of the polyester fiber is enhanced after the polyester fiber is changed into a molten state.
As a further improvement of the invention, when the polyester fiber sheet is heated to a state and is discharged out of the screw extruder, the magnetic block is used again to adsorb metal impurities in the polyester fiber in a molten state.
By adopting the technical scheme, after the polyester fiber is in a molten state, metal impurities which are not removed before are more easily sucked out by the magnetic block when the polyester fiber is in the molten state, so that the quality of subsequent spinning of the polyester fiber is improved.
As a further improvement of the invention, the spinning of S7 is carried out, the polyester fiber in a molten state coming out of a metering pump is conveyed to a spinneret plate, and after passing through the spinneret plate, the polyester fiber in the molten state is processed into polyester fiber yarns, and the temperature at the spinneret plate is 270-280 ℃.
By adopting the technical scheme, the temperature at the position is correspondingly low relative to 300 ℃, when the temperature does not reach 300 ℃, a part of the fluidity of the polyester fiber is correspondingly deteriorated, the polyester fiber is easier to be sprayed into threads after passing through a spinneret plate, and the subsequent processing is convenient.
As a further improvement of the invention, the spinneret is coated with a atomized silicone oil.
Through adopting above-mentioned technical scheme, before the spinneret is installed, scribble atomizing silicon oil on the spout of spinneret, for make polyester fiber in by the spun in-process, convenient and fast more breaks away from with the spinneret, prevents that polyester fiber from condensing on the spinneret.
As a further improvement of the invention, in S9, the screened polyester fiber yarn is conveyed to a yarn holding barrel for placing, and then the air-cooled polyester fiber yarn is conveyed to a drawing machine by a yarn guide machine for drawing twice.
By adopting the technical scheme, before drawing, the polyester fiber is oiled, then the polyester fiber is more beneficial to entering polyester fiber molecules during the process of drawing and heating, the heating enables the chemical property among all substances in the oiling agent to be stronger, and the speed of the oiling agent condensed on the polyester fiber molecules is accelerated, so that the polyester fiber has good electric resistance after being processed, and the polyester fiber obtains a sufficient orientation structure after being drawn twice; the macromolecule in the polyester fiber is regularly arranged, the strength of the fiber is improved, and the elongation is reduced. The polyester fiber is adhered with oil agent and treated in a heating state, so that the internal stress generated during stretching of macromolecules under the action of heat is eliminated, and the shrinkage rate of the polyester fiber is reduced.
As a further improvement of the invention, the S10 yarn folding is that the polyester fiber yarn is drawn twice and then conveyed to a yarn folding machine for yarn folding, so that the polyester fiber yarn is bundled.
By adopting the technical scheme, the polyester fiber yarns after being drawn are mutually overlapped, so that the polyester fiber yarns can be conveniently curled in the follow-up process.
As a further improvement of the invention, the S8 screening step is to convey polyester fiber yarns with the diameter less than 0.1mm to a yarn containing barrel for air cooling.
By adopting the technical scheme, the diameter of the screened polyester fiber is less than 0.1mm, so that the excellent quality of the produced polyester staple fiber is ensured.
In conclusion, the invention has the advantages and beneficial effects that:
1. before drawing, oiling polyester fiber yarns, and enabling the produced polyester staple fibers to have good antistatic performance through the oiling agent used by the invention;
2. the magnets are used for adsorbing metal impurities in the polyester fibers before and during melting of the polyester fibers, so that the quality of the polyester fibers is improved.
Drawings
FIG. 1 is a process flow diagram of a polyester staple fiber production process of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1:
referring to fig. 1, a polyester staple fiber production process, which comprises the following steps of treating commercially available blue and white chips:
s1: and (4) feeding. The blue and white slices bought from the market are put into a high-level bin and enter into the rotary drum from the high-level bin. And the blue-white sheet is a polyester fiber sheet.
S2: and (5) drying at high temperature. After the polyester fiber sheets enter the rotary drum, the temperature in the rotary drum is adjusted to 130 ℃, and then water vapor in the rotary drum is pumped out by using an air pump. The time for pumping the steam was 30min, and the temperature in the drum was kept at 130 ℃ continuously during the pumping of the steam.
S3: and removing metal impurities. The discharge port of the rotary drum is provided with a magnetic block, and after the water vapor in the polyester fiber sheet is removed, the metal impurities on the polyester fiber sheet are completely adsorbed by the magnetic block when the polyester fiber sheet is discharged from the rotary drum.
S4: heating and melting. After metal impurities are removed, the polyester fiber sheet is conveyed into a screw extruder, the temperature in the screw extruder is adjusted to 300 ℃, and then heat preservation is carried out for 50min, so that the polyester fiber sheet is completely changed into a molten state. And a magnetic block is arranged at a discharge port of the screw extruder to further remove metal impurities in the polyester fibers in a molten state.
S5: and (5) filtering. The polyester fibers in the molten state are uniformly conveyed to the melt filter, and the impurities in the polyester fibers are filtered out by the polyester fibers passing through the melt filter, so that the quality of the polyester fibers is improved.
S6: and (4) dispensing by a metering pump. The filtered polyester fiber is uniformly conveyed into a metering pump, and then the polyester fiber in a molten state is distributed into a plurality of parallel lines by the metering pump.
S7: and (6) spinning. The polyester fiber after passing through the metering pump is conveyed to the spinneret plate, and due to continuous material punching, the polyester fiber is enabled to pass from one side of the spinneret plate to the other side, and the polyester fiber is enabled to become polyester fiber yarns. The polyester fiber is fed to a spinneret at any temperature between 270 ℃ and 280 ℃ and coated with atomized silicone oil.
S8: and (4) screening. The polyester fiber yarns are conveyed into a seven-roller tractor, and then the distance between rollers of the seven-roller tractor is adjusted, so that only the polyester fiber yarns with the diameter less than or equal to 0.1mm can pass through, and the polyester fiber yarns with the diameter more than 0.1mm are scraped off by the seven-roller tractor and fall out of the seven-roller tractor. And conveying the screened polyester fiber yarns into a yarn containing barrel for placing until the polyester fiber yarns are cooled to room temperature in air.
S9: and (4) drawing twice. Conveying the polyester fiber yarn cooled to room temperature in the yarn containing barrel to an oil solution tank for soaking for 55min, then conveying the polyester fiber yarn to a six-roller yarn guide machine for traction, and heating the polyester fiber yarn in the traction process at the heating temperature of 130 ℃; then conveying the fiber to a seven-roller drawing machine for secondary drawing, and heating the polyester fiber yarn during drawing at a heating temperature of 130 ℃. The chemical compositions of all substances of the oil agent in the oil agent tank are as follows by mass percent: 20% of laureth sulfate TEA salt, 20% of decyl betaine, 45% of potassium dodecylbenzene sulfonate, 10% of glutamyl amino ethyl indole and 5% of hyaluronic acid benzyl ester, wherein the amount of the oil agent is 1% of the mass of the polyester fiber.
S10: and (5) overlapping the filaments. And conveying the polyester fiber yarns subjected to the two-time drawing to a yarn folding machine for yarn folding.
S11: and (4) presetting. And conveying the stacked polyester fiber yarns into a preset oven for presetting, wherein the temperature of the preset oven is adjusted to 180 ℃, and the presetting time is 10 min.
S12: and (4) curling. And conveying the pre-shaped polyester fiber yarns into a crimping machine for crimping.
S13: shredding. The crimped polyester fiber filaments are conveyed to a filament cutter, and the polyester fiber filaments are cut into short filaments, and then polyester short fiber filaments are formed.
S14: and (5) relaxing and shaping. And conveying the cut polyester staple fibers into a relaxation setting machine for relaxation setting, wherein the temperature of the relaxation setting machine is adjusted to 200 ℃, and the relaxation setting time is 20 min.
S15: and (5) breaking up. Conveying the relaxed and shaped polyester staple fibers to a scattering machine for scattering. And finally, packaging the polyester short fibers.
Examples 2-5 differ from example 1 in that the respective contents of the oil in the two pulls of S9 are in percent as follows: unit: is based on
Comparative example 1:
the difference from example 1 is that S9: and (4) drawing twice. Conveying the screened polyester fiber yarns to a six-roller yarn guide machine for traction, and heating the polyester fiber yarns in the traction process, wherein the heating temperature is 130 ℃; then conveying the fiber to a seven-roller drawing machine for secondary drawing, and heating the polyester fiber yarn during drawing at a heating temperature of 130 ℃.
Comparative example 2:
the difference from example 1 is that S9: and (4) drawing twice. Conveying the polyester fiber yarn cooled to room temperature in the yarn containing barrel to an oil solution tank for soaking for 55min, and then conveying the polyester fiber yarn to a six-roller yarn guide machine for drawing; then the obtained product is conveyed to a seven-roller drafting machine for secondary drawing. The chemical compositions of all substances of the oil agent in the oil agent tank are as follows by mass percent: 20% of laureth sulfate TEA salt, 20% of decyl betaine, 45% of potassium dodecylbenzene sulfonate, 10% of glutamyl amino ethyl indole and 5% of hyaluronic acid benzyl ester, wherein the amount of the oil agent is 1% of the mass of the polyester fiber.
Comparative example 3:
the difference from example 1 is that S9: and (4) drawing twice. Conveying the screened polyester fiber yarns to a six-roller yarn guide machine for traction; then the obtained product is conveyed to a seven-roller drafting machine for secondary drawing.
And (3) testing the antistatic property: the polyester staple fibers made in the present invention using the processes of example 1, example 2, example 3, comparative example 1, comparative example 2 and comparative example 3 were subjected to the national standard GBT12703.4-2010 part 4 of evaluation of electrostatic properties of textiles: resistivity and GBT112703.5-2010 "assessment of electrostatic properties of textiles part 5: triboelectrification voltage ", and the specific results are shown in table 1:
as can be seen from the above table, the oil used in the present invention and the heating performed during the two-time drawing process make the prepared polyester staple fiber have a large surface resistivity, a small triboelectric charging voltage, and a durable and excellent antistatic property. The oil used in the invention has a remarkable influence on the antistatic property, the antistatic property of the polyester staple fiber is greatly reduced after the oil is lacked, and the antistatic property of the polyester staple fiber can be remarkably improved by heating the polyester filament in the process of twice traction.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (9)
1. A production process of polyester staple fiber is characterized in that: the polyester fiber sheet is processed by the following steps:
s2: putting the polyester fiber sheet into a rotary drum for high-temperature drying; after the polyester fiber sheet is subjected to temperature of 130 ℃, water in the polyester fiber sheet is changed into water vapor, and the water vapor is pumped out of the rotary drum by using an air pump;
s3: removing metal impurities from the polyester fiber sheet subjected to high-temperature drying;
s4: heating and melting the polyester fiber sheet with the metal impurities removed;
s5: filtering the polyester fiber sheet after heating and melting;
s6: introducing the filtered polyester fiber sheet into a metering pump for distribution;
s7: carrying out spinning on the polyester fiber sheet by a metering pump, and changing the polyester fiber sheet into polyester fiber yarns after spinning;
s8: screening the polyester fiber yarns after the yarn spraying, and scraping off the polyester fiber yarns with the diameter of more than 0.1 mm;
s9: drawing the screened polyester fiber yarn twice, heating the drawn polyester fiber yarn in the two drawing processes at the heating temperature of 180 ℃, soaking the drawn polyester fiber yarn in an oil agent groove for 50-60 min before the first drawing, wherein the chemical compositions of all substances of the oil agent are as follows by mass percent: 15-25% of laureth sulfate TEA salt, 15-25% of decyl betaine, 40-50% of potassium dodecylbenzenesulfonate, 8-12% of glutamyl amino ethyl indole and 2-8% of hyaluronic acid benzyl ester;
the potassium dodecylbenzene sulfonate and water vapor molecules in the air are mutually combined to form a hydrogen bond, so that a polar center is formed on the surface of the polyester fiber; the potassium dodecylbenzene sulfonate and the TEA salt are mutually combined and jointly adsorbed on the surface of the polyester fiber, and covalent bonds and hydrogen bonds are mutually staggered to form a continuous film layer, so that the resistance of the surface of the polyester fiber is reduced, and the antistatic effect is achieved;
s10: overlapping the polyester fiber yarns subjected to twice traction;
s11: presetting the polyester fiber yarns after the yarn stacking;
s12: crimping the pre-shaped polyester fiber yarn;
s13: shredding the crimped polyester fiber yarns to form polyester staple fibers;
s14: loosening and shaping the polyester staple fiber after shredding;
s15: scattering the polyester staple fiber after the loose shaping;
and the polyester staple fiber yarn scattered by the S15 is the finished polyester staple fiber.
2. The polyester staple fiber production process according to claim 1, characterized in that: and S3 removing the metal impurities, wherein a magnetic block is arranged on a discharge port of the rotary drum, and the metal impurities on the polyester fiber sheet are adsorbed by the magnetic block, so that the metal impurities on the polyester fiber sheet are removed.
3. The polyester staple fiber production process according to claim 1, characterized in that: and S4, heating and melting, conveying the polyester fiber sheet subjected to metal impurity removal into a screw extruder, and adjusting the temperature in the screw extruder to 300 ℃ so that the polyester fiber sheet is melted into a molten state.
4. The polyester staple fiber production process according to claim 3, characterized in that: when the polyester fiber sheet is heated to a state and is discharged out of the screw extruder, the magnetic block is used again to adsorb metal impurities in the polyester fiber in a molten state.
5. The polyester staple fiber production process according to claim 1, characterized in that: and (3) spinning by the S7, conveying the polyester fiber in a molten state from the metering pump to a spinneret plate, processing the polyester fiber in the molten state into polyester fiber yarns after passing through the spinneret plate, wherein the temperature of the spinneret plate is 270-280 ℃.
6. The polyester staple fiber production process according to claim 5, characterized in that: the spinneret plate is coated with atomized silicone oil.
7. The polyester staple fiber production process according to claim 1, characterized in that: and S9, conveying the screened polyester fiber yarns into a yarn containing barrel for placing, and conveying the air-cooled polyester fiber yarns into a drawing machine by a yarn guide machine for drawing twice.
8. The polyester staple fiber production process according to claim 1, characterized in that: and S10 yarn folding, wherein the polyester fiber yarns are conveyed to a yarn folding machine for yarn folding after being drawn twice, so that the polyester fiber yarns are bundled.
9. The polyester staple fiber production process according to claim 7, characterized in that: and S8 screening, and conveying the polyester fiber yarns with the diameter less than 0.1mm to a yarn containing barrel for air cooling.
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| CN110923842B (en) * | 2019-11-25 | 2022-05-03 | 杭州奔马化纤纺丝有限公司 | Preparation process of non-dyed primary polyester staple fiber |
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| CN111485291A (en) * | 2020-04-16 | 2020-08-04 | 莱芜富新纤维制品有限公司 | Production process of polyester staple fiber |
| CN111607828A (en) * | 2020-04-30 | 2020-09-01 | 程明 | Polyester staple fiber production process |
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