Production method of high-strength wear-resistant polyester filament yarn

文档序号：1948806 发布日期：2021-12-10 浏览：26次中文

阅读说明：本技术 一种高强耐磨涤纶长丝的生产方法 (Production method of high-strength wear-resistant polyester filament yarn ) 是由蔡林森于 2021-10-09 设计创作，主要内容包括：本发明公开了一种高强耐磨涤纶长丝的生产方法,包括以下步骤：以高粘聚酯切片为原料,依次经过(1)预结晶、(2)干燥、(3)挤压、(4)过滤、(5)分丝、(6)喷丝、(7)环吹风、(8)上油和(9)牵伸卷绕制成涤纶长丝；所述步骤(9)牵伸卷绕具体为,丝束通过纺丝通道进入卷绕系统,依次经过六道辊牵伸；在步骤(1)～步骤(9)中通过温度控制系统控制各个步骤,使每个步骤的内部温差为-0.1℃～0.1℃；在步骤(9)的卷绕系统内通过油雾处理装置进行油雾收集。本发明采用六道牵伸提高温控精度和增加油雾收集的方式,在不增加其他成分的前提下,提高了涤纶长丝的强度和耐磨性能,降低了生产成本。(The invention discloses a production method of high-strength wear-resistant polyester filament yarns, which comprises the following steps: high-viscosity polyester chips are taken as raw materials, and are sequentially subjected to (1) pre-crystallization, (2) drying, (3) extrusion, (4) filtration, (5) yarn separation, (6) spinning, (7) circular blowing, (8) oiling and (9) drafting winding to prepare polyester filament yarns; the drafting and winding in the step (9) is specifically that the tows enter a winding system through a spinning channel and are sequentially drafted through six rollers; controlling each step in the steps (1) to (9) through a temperature control system to enable the internal temperature difference of each step to be-0.1 ℃; and (4) collecting oil mist in the winding system of the step (9) through an oil mist treatment device. The invention adopts six-path drafting to improve the temperature control precision and increase the mode of oil mist collection, improves the strength and the wear resistance of the polyester filament yarn and reduces the production cost on the premise of not increasing other components.)

1. The production method of the high-strength wear-resistant polyester filament yarn is characterized by comprising the following steps:

high-viscosity polyester chips are taken as raw materials, and are sequentially subjected to (1) pre-crystallization, (2) drying, (3) extrusion, (4) filtration, (5) yarn separation, (6) spinning, (7) circular blowing, (8) oiling and (9) drafting winding to prepare polyester filament yarns;

the drafting and winding in the step (9) is specifically that the tows enter a winding system through a spinning channel, are sequentially drafted through six rollers, pass through a main network device and are wound into spinning cakes through a high-speed winding machine;

controlling each step in the steps (1) to (9) through a temperature control system to enable the internal temperature difference of each step to be-0.1 ℃;

and (4) collecting oil mist in the winding system of the step (9) through an oil mist treatment device.

2. The production method of the high-strength wear-resistant polyester filament yarn as claimed in claim 1, wherein the pre-crystallization in the step (1) is implemented by conveying high-viscosity polyester chips to a suspension air separator for dust removal through dry nitrogen for later use;

the residence time of the dedusted high-viscosity polyester chips in the crystallizer is 1 hour, and the temperature of electric heating is 160 ℃.

3. The production method of the high-strength wear-resistant polyester filament yarn as claimed in claim 1, wherein the drying in the step (2) is specifically that the high-viscosity polyester chips are conveyed into a drying device under the protection of dry nitrogen, the high-viscosity polyester chips are dried for 6 hours at 150 ℃, and when the water content is lower than 20ppm after the high-strength wear-resistant polyester chips are dried, the high-strength wear-resistant polyester filament yarn enters the next process.

4. The production method of the high-strength wear-resistant polyester filament yarn as claimed in claim 1, wherein the extrusion in the step (3) is specifically that the dried high-viscosity polyester chips are conveyed to a screw extruder, the diameter of a screw of the screw extruder is 200mm, the length-diameter ratio L/D of the screw is 32:1, the extrusion temperature is 300-310 ℃, the extrusion ambient pressure is 15MPa, the high-viscosity polyester chips are melted at high temperature after being extruded and mixed to prepare a melt, the melt is metered and conveyed to a spinning unit, and the temperature of a conveying pipeline is 300-310 ℃.

5. The production method of the high-strength wear-resistant polyester filament yarn as claimed in claim 1, wherein the filtering in the step (4) is specifically that the extruded melt is filtered by a melt filter with the filtering precision of 40 μm.

6. The production method of the high-strength wear-resistant polyester filament yarn as claimed in claim 1, wherein the step (5) of dividing is that the filtered melt enters a spinning box through a distribution pipeline and is distributed in the spinning box at a temperature of 300-310 ℃.

7. The production method of the high-strength wear-resistant polyester filament yarn as claimed in claim 1, wherein the spinning in the step (6) is carried out by filtering, mixing, dissolving and pressurizing the melt through a melting bath of a spinning box, and then spraying the melt from a circular multi-hole spinneret plate, wherein the hole diameter of a spinneret hole of the circular multi-hole spinneret plate is 0.6mm, and the length-diameter ratio of the spinneret hole is 4: 1.

8. The production method of the high-strength wear-resistant polyester filament yarn as claimed in claim 1, wherein the circular blowing in the step (7) is specifically that the spun yarn sprayed by the circular porous spinneret is cooled in a circular blowing device by an air cooling mode to form a filament bundle, and the air cooling temperature is 21 ℃ and the humidity is 70%.

9. The production method of the high-strength wear-resistant polyester filament yarn as claimed in claim 1, wherein the oiling in the step (8) is carried out by uniformly coating the oiling agent on the surface of the filament yarn through a pre-network device after the filament yarn is oiled by the oiling wheel.

Technical Field

The invention relates to the field of fiber manufacturing, in particular to a production method of high-strength wear-resistant polyester filament yarns.

Background

In order to improve the strength and wear resistance of polyester filament yarn to meet the market demand, it is common in the art to add other performance enhancing substances to the raw material for production or add a coating on the outside of the polyester product. Other raw materials are added in the production process, so that the production cost is greatly improved, and the competitiveness of the product is reduced.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the production method of the high-strength wear-resistant polyester filament yarn is provided, and the production cost is reduced on the premise of enhancing the wear resistance and strength of the polyester filament yarn.

In order to solve the technical problems, the invention adopts the technical scheme that:

a production method of high-strength wear-resistant polyester filament yarns comprises the following steps:

controlling each step in the steps (1) to (9) through a temperature control system to enable the internal temperature difference of each step to be-0.1 ℃;

and (4) collecting oil mist in the winding system of the step (9) through an oil mist treatment device.

The invention has the beneficial effects that: the invention controls the temperature of the working procedures of splitting, spinning, oiling and the like in the production process, so that the silk thread is heated more uniformly in the working procedures, and the quality unevenness of the silk thread caused by overlarge temperature fluctuation is avoided; meanwhile, the oil mist collecting device is combined to collect the oil mist in the winding system, so that the saturation of the oil mist in the box body is more uniform, the oil condensate is reduced, defective products (oil stain yarns) are reduced, the oil path of the hot roller is smooth due to the uniform saturation of the oil mist, the end breakage rate is reduced, the filament bundles are uniformly heated, and the quality of products is improved; in addition, the smooth oil path of the hot roller enables the hot roller to run more smoothly in the cover box, the fluctuation of the running temperature of the hot roller caused by the blockage of the oil path due to oil mist is avoided, and the temperature in the hot roller cover box fluctuates along with the fluctuation of the oil path, so that the fluctuation range of the temperature in the box body is greatly reduced by arranging the oil mist collecting device in the winding system, the fluctuation range of the temperature is increased to +/-0.1 ℃ from the original +/-2 ℃, the quality index fluctuation of the produced product is smaller, the cover box is uniformly heated, the air flow temperature, the air speed and the air volume are stable, the fluctuation range of the yarn path is stable, the fineness of the produced yarns is more uniform, and the breaking strength and the breaking elongation index of the yarns are better. According to the invention, the silk thread is uniformly heated through temperature control and oil mist control, so that the performances of improving the strength of the silk thread and reducing the yarn expansion rate and the thermal shrinkage rate are achieved, the manufactured polyester filament yarn is more wear-resistant, other components are not required to be added, the effects of enhancing the strength and the wear resistance of the polyester filament yarn can be achieved, and the production cost is reduced.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description will be given with reference to the embodiments.

A production method of high-strength wear-resistant polyester filament yarns comprises the following steps:

controlling each step in the steps (1) to (9) through a temperature control system to enable the internal temperature difference of each step to be-0.1 ℃;

and (4) collecting oil mist in the winding system of the step (9) through an oil mist treatment device.

The working principle of the invention is as follows:

the effects of improving the strength and the wear resistance of the silk thread can be achieved without adding other components by drawing with six rollers, controlling the temperature to fluctuate within-0.1 ℃ and collecting oil mist, and the production cost is reduced.

From the above description, the beneficial effects of the present invention are: according to the invention, the temperature of each process in the production process is accurately controlled, so that the silk threads are heated more uniformly in each process, and the quality unevenness of the silk threads caused by overlarge temperature fluctuation is avoided; meanwhile, the oil mist collecting device is combined to collect the oil mist in the winding system, so that the saturation of the oil mist in the box body is more uniform, the oil condensate is reduced, defective products (oil stain yarns) are reduced, the oil path of the hot roller is smooth due to the uniform saturation of the oil mist, the end breakage rate is reduced, the filament bundles are uniformly heated, and the quality of products is improved; in addition, the smooth oil path of the hot roller enables the hot roller to run more smoothly in the cover box, the fluctuation of the running temperature of the hot roller caused by the blockage of the oil path due to oil mist is avoided, and the temperature in the hot roller cover box fluctuates along with the fluctuation of the oil path, so that the fluctuation range of the temperature in the box body is greatly reduced by arranging the oil mist collecting device in the winding system, the fluctuation range of the temperature is increased to +/-0.1 ℃ from the original +/-2 ℃, the quality index fluctuation of the produced product is smaller, the cover box is uniformly heated, the air flow temperature, the air speed and the air volume are stable, the fluctuation range of the yarn path is stable, the fineness of the produced yarns is more uniform, and the breaking strength and the breaking elongation index of the yarns are better. According to the invention, the silk thread is uniformly heated through temperature control and oil mist control, so that the performances of improving the strength of the silk thread and reducing the yarn expansion rate and the thermal shrinkage rate are achieved, the manufactured polyester filament yarn is more wear-resistant, other components are not required to be added, the effects of enhancing the strength and the wear resistance of the polyester filament yarn can be achieved, and the production cost is reduced.

Further, the pre-crystallization in the step (1) is specifically that the high-viscosity polyester chips are conveyed to a suspension separator for dust removal through dry nitrogen for later use;

the residence time of the dedusted high-viscosity polyester chips in the crystallizer is 1 hour, and the temperature of electric heating is 160 ℃.

Further, the drying in the step (2) is specifically that the high-viscosity polyester chip is conveyed into a drying device under the protection of dry nitrogen, is dried for 6 hours at 150 ℃, and enters the next process when the water content is lower than 20ppm after drying.

Further, the extrusion in the step (3) is specifically that the dried high-viscosity polyester slices are conveyed to a screw extruder, the diameter of a screw of the screw extruder is 200mm, the length-diameter ratio L/D of the screw is 32:1, the extrusion temperature is 300-310 ℃, the pressure of the extrusion environment is 15MPa, the high-viscosity polyester slices are melted at high temperature and mixed to prepare a melt after being extruded, the melt is conveyed to a spinning unit after being measured, and the temperature of a conveying pipeline is 300-310 ℃.

Further, the step (4) of filtering is specifically that the extruded melt is filtered by a melt filter with the filtering precision of 40 μm.

According to the description, the melt is uniformly melted by adopting a mode of filtering the melt, so that the melt can be uniformly distributed in the subsequent distribution process, the agglomeration is avoided, and the product quality is improved.

Further, the step (5) of dividing the filaments is specifically that the filtered melt enters a spinning manifold through a distribution pipeline and is distributed in the spinning manifold at the temperature of 300-310 ℃.

Further, the spinning in the step (6) is specifically that the melt is filtered, mixed and pressurized by a spinning box molten pool and then is ejected from a circular multi-hole spinneret plate, the hole diameter of a spinneret hole of the circular multi-hole spinneret plate is 0.6mm, and the length-diameter ratio of the spinneret hole is 4: 1.

Further, the circular blowing in the step (7) is specifically that the spun yarn sprayed by the circular porous spinneret plate is cooled in a circular blowing device in an air cooling mode to form a filament bundle, wherein the air cooling temperature is 21 ℃, and the humidity is 70%.

Further, the oiling in the step (8) is specifically that after the tows are oiled by an oil tanker, the oiling agent is uniformly wrapped on the surfaces of the tows through a pre-network device.

From the above description, the strand switching rate is improved by applying oil to the strand.

Comparative example

The production is carried out by adopting the traditional polyester filament yarn production process, which comprises the following steps: the preparation method comprises the steps of taking high-viscosity polyester chips as raw materials, and sequentially carrying out (1) pre-crystallization, (2) drying, (3) extrusion, (4) filtration, (5) yarn separation, (6) spinning, (7) circular blowing, (8) oiling and (9) drafting winding to prepare the polyester filament yarn.

Example one

A production method of high-strength wear-resistant polyester filament yarns comprises the following steps:

The drafting and winding in the step (9) is specifically that the tows enter a winding system through a spinning channel, are sequentially drafted through six rollers, pass through a main network device and are wound into spinning cakes through a high-speed winding machine;

controlling each step in the steps (1) to (9) through a temperature control system to enable the internal temperature difference of each step to be-0.1 ℃;

and (4) collecting oil mist in the winding system of the step (9) through an oil mist treatment device.

The temperature control system is the existing equipment, and in order to realize accurate temperature control, the temperature control system is used for setting a program, so that the temperature difference of each step in the processing process is kept to fluctuate within-0.1 ℃.

Specifically, the pre-crystallization in the step (1) is to convey the high-viscosity polyester chips to a suspension separator for dust removal through dry nitrogen for later use; the residence time of the dedusted high-viscosity polyester chips in the crystallizer is 1 hour, and the temperature of electric heating is 160 ℃.

Specifically, the drying in the step (2) is that the high-viscosity polyester chip is conveyed into a drying device under the protection of dry nitrogen, is dried for 6 hours at 150 ℃, and enters the next procedure when the water content is lower than 20ppm after drying.

Specifically, the extrusion in the step (3) is to convey the dried high-viscosity polyester slices to a screw extruder, wherein the diameter of a screw of the screw extruder is 200mm, the length-diameter ratio L/D of the screw is 32:1, the extrusion temperature is 300-310 ℃, the pressure of the extrusion environment is 15MPa, the high-viscosity polyester slices are melted at high temperature and mixed to prepare a melt after being extruded, the melt is conveyed to a spinning unit after being measured, and the temperature of a conveying pipeline is 300-310 ℃.

Specifically, the step (4) of filtering is to filter the extruded melt through a melt filter with the filtering precision of 40 μm.

Specifically, the step (5) of yarn separation is that the filtered melt enters a spinning box through a distribution pipeline and is distributed in the spinning box at the temperature of 300-310 ℃.

Specifically, the spinning in the step (6) is that the melt is filtered, mixed, dissolved and pressurized by a spinning box molten pool and then is sprayed out from a circular multi-hole spinneret plate, the hole diameter of a spinneret hole of the circular multi-hole spinneret plate is 0.6mm, and the length-diameter ratio of the spinneret hole is 4: 1.

Specifically, the circular blowing in the step (7) is that the spun yarn sprayed by the circular porous spinneret plate is cooled in a circular blowing device in an air cooling mode to form a filament bundle, wherein the air cooling temperature is 21 ℃, and the humidity is 70%.

Specifically, the oiling in the step (8) is that after the tows are oiled by the oil tanker, the oiling agent is uniformly wrapped on the surfaces of the tows through the pre-network device.

Drawing and winding in the step (9) specifically comprise the steps that the suction gun pulls down the tows oiled in the step (8), the tows wind into a feeding roller, and the tows sequentially enter a pre-network, a guide wire and a splitting rod; leading wires are wound around the first hot roller and then are divided into wires, the wires enter the first row of wire dividing rods, then the wires are wound around the wire blocking rods and then enter the second hot roller and are divided, and the wires are divided and then enter the second row of wire dividing rods; and winding the filament turns specified by the conventional polyester production process by respectively winding the filament turns around the two rollers, the three rollers, the four rollers and the five rollers through the filament guide hook, sequentially drafting for six times, passing through the main network device, and winding into a spinning cake through a high-speed winding machine.

On the basis of six-path drafting of the yarn, the preparation of the polyester filament is carried out only by increasing the means of temperature control, the performance test is carried out on the prepared polyester filament by referring to GBT 16604-2017, and the test result is shown in the table I.

Watch 1

As can be seen from the table, temperature control of only the yarn production can improve the breaking strength of the yarn, reduce the elongation at break of the yarn, and reduce the boiling water shrinkage and the dry heat shrinkage.

On the basis of six-path drafting and temperature control of the yarn, an oil mist collecting device is added in the winding system to prepare the polyester filament yarn, and the performance of the prepared polyester filament yarn is tested, wherein the test results are shown in the table two.

Watch two

From the second table, oil mist collection is added on the basis of six-pass drawing and temperature control of the yarn, the breaking strength of the yarn is further improved, the breaking elongation, boiling water shrinkage and dry heat shrinkage of the yarn are further reduced, the breaking strength can reach 8cN/dtex at most, the breaking elongation reaches 13.5 +/-2%, the boiling water shrinkage reaches 1.5 +/-0.3%, the dry heat shrinkage reaches 1.8 +/-0.5%, and the CV value of the breaking strength is smaller than that of a comparative example, which shows that the product prepared in the first embodiment has smaller breaking strength fluctuation and more stable product quality, and the effect is difficult to achieve by the traditional polyester production process.

In conclusion, the high-strength wear-resistant polyester filament provided by the invention has the advantages that the temperature in the production process is accurately controlled, the filament bundle is uniformly heated, six drafting paths and oil mist collection are combined, the fineness of the filament bundle is more uniform, the breaking strength and breaking elongation index of the filament bundle are improved, the manufactured filament bundle has good wear resistance, the product quality can be improved without adding other components, and the production cost is reduced.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention in the specification or directly or indirectly applied to the related technical fields are included in the scope of the present invention.

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