CN113668077A - Production method of regenerated FDY (fully drawn yarn) environment-friendly bright fine denier fiber - Google Patents

Production method of regenerated FDY (fully drawn yarn) environment-friendly bright fine denier fiber Download PDF

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Publication number
CN113668077A
CN113668077A CN202111048713.1A CN202111048713A CN113668077A CN 113668077 A CN113668077 A CN 113668077A CN 202111048713 A CN202111048713 A CN 202111048713A CN 113668077 A CN113668077 A CN 113668077A
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fdy
environment
friendly
spinning
spinneret
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CN113668077B (en
Inventor
郭洪
秦纯煜
丁团结
张全玉
罗斌
王松波
王亚洲
尹春洲
平奇
孙国君
王宝健
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Zhejiang Jiaren New Materials Co ltd
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Zhejiang Jiaren New Materials Co ltd
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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
    • 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
    • D01D13/02—Elements of machines in combination
    • 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
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/02—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
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

The invention discloses a production method of regenerated FDY (fully drawn yarn) environment-friendly lustrous fine denier fiber, which comprises the following steps: (a) adding the regenerated PET bright slices into a crystallization drying system for pre-crystallization drying; (b) conveying the dried regenerated PET bright slices to a screw extruder for heating and melting to obtain a spinning melt, metering the spinning melt by a metering pump, and then conveying the spinning melt into a spinning assembly for spinning to obtain nascent tows; (c) and (3) after post-heating the primary tows and cooling the primary tows by a side blowing device, oiling the primary tows by an oiling device, and performing pre-networking, stretching and jacking, main networking and winding to obtain the FDY environment-friendly lustrous fine denier fiber. The invention can prepare the fiber with the characteristics of good spinnability, uniform evenness and uniform dyeing, and meets the market and environmental protection requirements.

Description

Production method of regenerated FDY (fully drawn yarn) environment-friendly bright fine denier fiber
Technical Field
The invention relates to the technical field of spinning, in particular to a production method of regenerated FDY (fully drawn yarn) environment-friendly lustrous fine denier fiber.
Background
The original luminous FDY25D/48F variety used in the current market has the phenomena of low strength and more broken filaments in the production process according to market reaction, and cannot reach an ideal production state, and the original variety has no advantages along with the improvement of environmental awareness of consumers and the requirement of brand merchants on green environmental protection; when the products woven by the primary varieties cannot meet ideal production conditions and experience requirements, the research and development of new environment-friendly yarns are imperative, and the research and development of fine denier products have wide market prospects.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a production method of regenerated FDY environment-friendly lustrous fine denier fiber, which can prepare fiber with the characteristics of good spinnability, uniform evenness and uniform dyeing, and meets the market and environment-friendly requirements.
In order to achieve the purpose, the invention adopts the following technical scheme:
a production method of regenerated FDY environment-friendly bright fine denier fiber comprises the following steps:
(a) adding the regenerated PET bright slices into a crystallization drying system for pre-crystallization drying;
(b) conveying the dried regenerated PET bright slices to a screw extruder for heating and melting to obtain a spinning melt, metering the spinning melt by a metering pump, and then conveying the spinning melt into a spinning assembly for spinning to obtain nascent tows;
(c) after post-heating and cooling the primary tows by a side blowing device, oiling the primary tows by an oiling device, and then pre-networking, stretching and jacking, main networking and winding to obtain the FDY environment-friendly lustrous fine denier fiber; the spinning equipment comprises a spinning air window, and a layer of 800-mesh fine net with the height of 10cm is additionally arranged on the upper part of the spinning air window.
The spinning assembly comprises three rows of 48F side-blown spinneret plates, each spinneret plate comprises spinneret holes, and the diameter of each discharge hole of each spinneret hole is 0.14mm, and the height of each discharge hole is 0.42 mm.
The spinneret plate comprises a central line L and a central line M which are perpendicular to each other, four spinneret orifices are distributed on the central line L, twenty-two spinneret orifices are respectively distributed on two sides of the central line L, the twenty-two spinneret orifices comprise four rows from inside to outside and are integrally distributed in an isosceles trapezoid shape, the four rows of the spinneret orifices are seven, six, five and four in sequence from inside to outside, the four rows of the spinneret orifices are symmetrically distributed by the central line M, and the four spinneret orifices on the central line L and the first, second, fifth and sixth of the six rows of the spinneret orifices are correspondingly positioned on the same straight line.
The height distance from the spinneret plate to an oil nozzle of the oiling device is 700 cm.
The oil pumping quantity of the oil agent during oiling is controlled to be 0.02 cc/rev.
The crystallization temperature of the regenerated PET bright slice is 155 ℃, the drying temperature is 150 ℃, the drying wind pressure is 0.08Mpa, and the drying time is 11 h.
Stretching ratio of 2.1, GR, at the time of stretch-setting1Speed 2180m/min, GR2The speed is 4650m/min, the stretching temperature is 81 ℃, and the setting temperature is 124 ℃.
The winding speed during winding molding was 4595m/min, and the winding angle was 6.3 degrees.
The invention has the beneficial effects that: the PET regenerated bright slice is used as a raw material, and the regenerated FDY environment-friendly bright fine denier fiber with good spinnability, uniform evenness and uniform dyeing is prepared by the design improvement of a production process, a spinneret plate and a spinning air window, so that the hand feeling of the fabric is favorably improved, and the market and environment-friendly requirements are met.
Drawings
FIG. 1 is a top view of an oiling device oil circulation mechanism of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a cross-sectional view taken along line C-C of FIG. 1;
FIG. 5 is a cross-sectional view taken along line D-D of FIG. 1;
FIG. 6 is a schematic side view of a spin window modification embodying the present invention;
fig. 7 is a side view of a spinneret plate of the present invention.
In the figure: the device comprises a main oil tank 1, a first conduit 11, a first valve 12, a first oil tank 2, a second conduit 21, a second valve 22, a filter screen 23, a second oil tank 3, a third conduit 31, a third valve 32, a third oil tank 4, a fourth conduit 41, a fourth valve 42, a frame 5, a lever member 51, a buffer cushion 52, a spinneret plate 6, a spinneret hole 61, a spinning air window 7 and a fine mesh 8.
Detailed Description
The invention is further described with reference to the accompanying drawings and the detailed description below:
a production method of regenerated FDY environment-friendly bright fine denier fiber comprises the following steps:
(a) adding the regenerated PET bright slices into a crystallization drying system for pre-crystallization drying;
(b) conveying the dried regenerated PET bright slices to a screw extruder for heating and melting to obtain a spinning melt, metering the spinning melt by a metering pump, and then conveying the spinning melt into a spinning assembly for spinning to obtain nascent tows;
(c) after post-heating and cooling the primary tows by a side blowing device, oiling the primary tows by an oiling device, and then pre-networking, stretching and jacking, main networking and winding to obtain the FDY environment-friendly lustrous fine denier fiber; the spinning equipment comprises a spinning air window 7, and a layer of 800-mesh fine net 8 with the height of 10cm is additionally arranged on the upper part of the spinning air window 7. The fine net 8 is favorable for side-blowing cooling of the strand silk, the shaking of the strand silk in the spinning air window 7 is reduced, the cooling time is delayed, the uniformity of the strand silk is convenient to control, and the final yarn evenness value is below 1%.
The spinning assembly comprises a 48F side-blown spinneret 6 with three rows of holes, the spinneret 6 comprises spinneret holes 61, and the discharge hole diameter of each spinneret hole 61 is 0.14mm, and the height of each spinneret hole is 0.42 mm.
The spinneret plate 6 comprises a central line L and a central line M which are perpendicular to each other, four spinneret holes 61 are distributed on the central line L, twenty-two spinneret holes 61 are distributed on two sides of the central line L respectively, the twenty-two spinneret holes 61 comprise four rows from inside to outside and are distributed integrally in an isosceles trapezoid shape, the four rows of the spinneret holes 61 are seven, six, five and four in sequence from inside to outside, the spinneret holes 61 in each row are symmetrically distributed on the central line M, and the four spinneret holes 61 positioned on the central line L and the first, second, fifth and sixth spinneret holes 61 in the six rows are correspondingly positioned on a straight line. By improving the spinneret 6, the spinning stability is improved, and the fabric hand feeling is improved.
The height distance from the spinneret plate 6 to the oil nozzle of the oiling device is 700cm, and through the improvement, the air pressure in the air chamber is more stable, and the spinnability and the evenness uniformity are further ensured.
The oil pumping quantity of the oil agent during oiling is controlled to be 0.02 cc/rev. When the oil pumping amount of the oil agent is more than 0.02cc/rev, uneven oiling and yarn breakage of fibers are easy to occur, and the fiber is easy to be subjected to GR1The phenomenon of winding the stick.
The crystallization temperature of the regenerated PET bright slice is 155 ℃, the drying temperature is 150 ℃, the drying wind pressure is 0.08Mpa, and the drying time is 11 h. The drying adopts a low-temperature drying technology, can prevent the phenomenon of dry slicing and tackifying caused by high drying temperature, is beneficial to spinning and improves the performance of finished products.
Stretching ratio of 2.1, GR, at the time of stretch-setting1Speed 2180m/min, GR2The speed is 4650m/min, the stretching temperature is 81 ℃, and the shaping temperature isThe temperature is 124 ℃.
The winding speed during winding molding was 4595m/min, and the winding angle was 6.3 degrees.
Table 1 shows the statistics of physical property data of the regenerated FDY environment-friendly lustrous fine denier fiber produced by the method of the invention, and the fiber can reach the performance index requirements of superfine denier fiber.
TABLE 1
Item Index (I) Measured value
Fineness of fiber 28dtex 28.2dtex
Elongation at break 30％ 35.8％
Breaking strength Greater than 3.8CN/dtex 4.53CN/dtex
Oil content 0.9±0.1％ 0.93％
Shrinkage in boiling water ≦7.3％ 7.1％
Unevenness of evenness ≦1％ 0.96％
Network degree 20 pieces/m or more 32 pieces/m
For reducing the finish extravagant, present device that oils collects the recovery through reflux mechanism with unnecessary finish generally behind the spraying finish and recycles, but no matter be domestic or import spinning finish all have the problem of being difficult to store, and the finish is motionless in the oil storage tank, can cause the finish to deposit after the time of a specified duration, appears the oil level local solidification, can cause unfavorable factors such as finish quality variation, the effect of oiling is influenced.
The oiling device comprises an oiling agent storage and circulation mechanism which forms a circulation and return system with nozzle oil injection, wherein the oiling agent storage and circulation mechanism comprises a main oil tank 1, a frame 5, a pair of first oil tanks 2 arranged in the frame 5 and a pair of third oil tanks 4 arranged outside the frame 5, the pair of first oil tanks 2 are alternately replaced, the top of each first oil tank 2 is communicated or isolated with the lower part of the main oil tank 1, the bottom of each first oil tank 2 is communicated or isolated and connected with a telescopic second oil tank 3, the lower part of each second oil tank 3 is communicated or isolated and connected with the bottom of the main oil tank 1, and the lower part of each third oil tank 4 is isolated or communicated and connected with the upper part of the main oil tank 1;
the inner cavity of the first oil tank 2 positioned at a high position is empty, partial oil is injected into the main oil tank 1 and a third oil tank 4 connected with the second oil tank 3 in an extending state, the second oil tank 3 connected with the first oil tank 2 at the high position is filled with oil, the first oil tank 2 positioned at a low position and the second oil tank 3 and the third oil tank 4 connected with the first oil tank 2 are both filled with oil, with reference to fig. 2, the first oil tank 2 at the left side is empty and positioned at the high position, the second oil tank 3 at the left side is filled with oil, the third oil tank 4 at the left side is partially filled with oil, the first oil tank 2 at the right side, the second oil tank 3 and the third oil tank 4 at the right side are all filled with oil, and the first oil tank 2 at the right side is positioned at the low position; the initial finish liquid level height is less than or equal to the inner chamber top surface that is located the first oil tank 2 of eminence in the main oil tank 1, fill up the finish oil in the third oil tank 4 can get into automatically in the main oil tank 1 and then make the automatic first oil tank 2 that gets into and fill up and be located the eminence of the finish oil in the second oil tank 3 that links to each other with it is impressed and is filled up the part third oil tank 4 that has the finish oil into in the first oil tank 2 that is located the eminence when injecting the finish oil, fill up the finish oil certainly the finish oil volume that the third oil tank 4 got into main oil tank 1 is the same with fill up the required finish oil volume of the first oil tank 2 of full empty, fill up the required finish oil volume of the part third oil tank 4 that has the finish oil.
The top of the first oil tank 2 is connected with a telescopic second conduit 21, the bottom of the main oil tank 1 is connected with the second conduit 21 through a first conduit 11, when the first oil tank 2 is at a high position, the first conduit 11 connected to the first oil tank 2 is in a compressed state and the second oil tank 3 connected to the first oil tank 2 is in an extended state, and when the first oil tank 2 is at a low position, the first conduit 11 connected to the first oil tank 2 is in an extended state and the second oil tank 3 connected to the first oil tank 2 is in a compressed state.
The first guide pipe 11 is provided with a first valve 12, the first guide pipe 11 is arranged upwards and slantwise towards the first oil tank 2, the first valve 12 is arranged at the port of the first guide pipe 11 connected with the second guide pipe 21, and the first oil tank 2 is communicated or separated with the second oil tank 3 through a second valve 22.
The bottom of the second oil tank 3 is connected with a third oil tank 4 through a third conduit 31, and the lower part of the third oil tank 4 is connected with the upper part of the main oil tank 1 through a fourth conduit 41. A third valve 32 is arranged on the third conduit 31; the fourth pipe 41 is provided with a fourth valve 42, the fourth pipe 41 is inclined upwards and towards the direction close to the main oil tank 1, the fourth pipe 41 is connected to the main oil tank 1, the pipe orifice of the fourth pipe 41 is always higher than the liquid level of the oil in the main oil tank 1, and the fourth valve 42 is arranged at the pipe orifice of the fourth pipe 41 close to the main oil tank 1.
The first oil tank 2 is attached to the inner wall of the frame 5 in a sliding mode. The frame 5 is provided with an opening at the upper end, and the frame 5 plays a role in stabilizing and guiding the vertical linear motion of the first oil tank 2.
A pair of said first tanks 2 is height-adjusted alternately by means of a lever member 51. Namely, the lever member 51 is hinged in the frame 5, and two ends of the lever member 51 are correspondingly hinged with the first oil tank 2.
A cushion 52 is fixed to an inner wall of the frame 5, and the first fuel tank 2 moves down to abut against the cushion 52. The buffer pads 52 are used for relieving the impact force of the first fuel tank 2 during the descending process, the buffer pads 52 may be replaced by other elastic buffer members, such as springs, and the buffer pads 52 may be distributed around the second fuel tank 3 or symmetrically distributed around the second fuel tank 3.
A filter screen 23 is fixed in the first oil tank 2.
The working mode of the oil agent storage circulation mechanism is as follows: initially, all valves are in a closed state, a siphon structure is formed between the third oil tank 4 filled with the oil agent and the main oil tank 1, the fourth valve 42 connected with the third oil tank 4 filled with the oil agent is opened, the oil agent in the third oil tank 4 filled with the oil agent automatically flows to the main oil tank 1 until the liquid levels in the two oil tanks are equal to each other, at the moment, the liquid level in the main oil tank 1 is higher than the empty first oil tank 2 at a high position, the main oil tank 1 and the empty first oil tank 2 form the siphon structure, and the liquid level in the third oil tank 4 originally filled with the oil agent is equal to the liquid level in the third oil tank 4 which is not filled with the oil agent originally; the fourth valve 42 opened before closing, and the first valve 12 on the first conduit 11 connected to the empty first oil tank 2 at the high position, the third valve 32 on the third conduit 31 connected to the second oil tank 3 in the stretched state, and the second valve 22 of the first oil tank 2 at the low position are opened, the oil in the main oil tank 1 is automatically injected into the empty first oil tank 2, and the second oil tank 3 connected to the empty first oil tank 2 is pressed down, so that the oil injection part in the second oil tank 3 is injected into the third oil tank 4 filled with the oil, at the same time, the oil in the first oil tank 2 at the low position gradually enters the compressed second oil tank 3 and gradually rises, along with the flowing of the oil, when the height of the pair of first oil tanks 2 is just right after the replacement, the originally empty first oil tank 2 is filled with the oil, the originally filled first oil tank 2 becomes empty, the telescopic state of the pair of second oil tanks 3 is just right after the replacement and the second oil tank 3 adjusted to the extended state is filled with the oil, the third oil tank 4 which is not filled originally is filled, the liquid level in the main oil tank 1 is reduced to the initial liquid level, and thus, the primary oil agent circulation is completed; and finishing the continuous circulation of the oil agent according to the steps.
The oil agent storage and circulation mechanism of the invention realizes the automatic circulation of the oil agent by utilizing the siphon principle, saves the energy consumption, avoids the precipitation of the oil agent, and ensures the quality of the oil agent, thereby ensuring the oiling effect of the subsequent fiber.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (8)

1. A production method of regenerated FDY environment-friendly bright fine denier fiber is characterized by comprising the following steps: the method comprises the following steps:
(a) adding the regenerated PET bright slices into a crystallization drying system for pre-crystallization drying;
(b) conveying the dried regenerated PET bright slices to a screw extruder for heating and melting to obtain a spinning melt, metering the spinning melt by a metering pump, and then conveying the spinning melt into a spinning assembly for spinning to obtain nascent tows;
(c) after post-heating and cooling the primary tows by a side blowing device, oiling the primary tows by an oiling device, and then pre-networking, stretching and jacking, main networking and winding to obtain the FDY environment-friendly lustrous fine denier fiber; the spinning equipment comprises a spinning air window (7), and a layer of 800-mesh fine net (8) with the height of 10cm is additionally arranged at the upper part of the spinning air window (7).
2. The method of claim 1, wherein the recycled FDY environment-friendly lustrous fine fiber is produced by the following steps: the spinning assembly comprises three rows of 48F side-blown spinneret plates (6), each spinneret plate (6) comprises spinneret holes (61), and the diameter of a discharge hole of each spinneret hole (61) is 0.14mm, and the height of each spinneret hole is 0.42 mm.
3. The method of claim 1, wherein the recycled FDY environment-friendly lustrous fine fiber is produced by the following steps: the spinneret plate (6) comprises a central line L and a central line M which are perpendicular to each other, four spinneret holes (61) are distributed on the central line L, twenty-two spinneret holes (61) are respectively distributed on two sides of the central line L, the twenty-two spinneret holes (61) comprise four rows from inside to outside and are integrally distributed in an isosceles trapezoid shape, the four rows of the spinneret holes (61) are seven, six, five and four in sequence from inside to outside, the four rows of the spinneret holes (61) are symmetrically distributed on the central line M, and the four spinneret holes (61) on the central line L and the first, second, fifth and sixth of the six rows of the spinneret holes (61) are correspondingly positioned on a straight line.
4. The method of claim 1, wherein the recycled FDY environment-friendly lustrous fine fiber is produced by the following steps: the height distance from the spinneret plate (6) to an oil nozzle of the oiling device is 700 cm.
5. The method of claim 1, wherein the recycled FDY environment-friendly lustrous fine fiber is produced by the following steps: the oil pumping quantity of the oil agent during oiling is controlled to be 0.02 cc/rev.
6. The method of claim 1, wherein the recycled FDY environment-friendly lustrous fine fiber is produced by the following steps: the crystallization temperature of the regenerated PET bright slice is 155 ℃, the drying temperature is 150 ℃, the drying wind pressure is 0.08Mpa, and the drying time is 11 h.
7. The method of claim 1, wherein the recycled FDY environment-friendly lustrous fine fiber is produced by the following steps: stretching ratio of 2.1, GR, at the time of stretch-setting1Speed 2180m/min, GR2The speed is 4650m/min, the stretching temperature is 81 ℃, and the setting temperature is 124 ℃.
8. The method of claim 1, wherein the recycled FDY environment-friendly lustrous fine fiber is produced by the following steps: the winding speed during winding molding was 4595m/min, and the winding angle was 6.3 degrees.
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