CN106119998A - A kind of spinning technique of PA66 undrawn yarn - Google Patents
A kind of spinning technique of PA66 undrawn yarn Download PDFInfo
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- CN106119998A CN106119998A CN201610729318.2A CN201610729318A CN106119998A CN 106119998 A CN106119998 A CN 106119998A CN 201610729318 A CN201610729318 A CN 201610729318A CN 106119998 A CN106119998 A CN 106119998A
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- undrawn yarn
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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
-
- 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
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/06—Washing or drying
-
- 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
- D01D5/088—Cooling 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
- D01D7/00—Collecting the newly-spun products
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The present invention provides the spinning technique of a kind of PA66 undrawn yarn, and described technique, including spinning, cooling molding；Described spinning, cooling molding, assembly preheating temperature is 313 324 DEG C；Dosing pump rotating speed is 12.0 16.0 revs/min.The PA66 undrawn yarn that the present invention prepares, fiber number is 115 155dtex；For 26 elastic force weft yarn yarn cores；The PA66 undrawn yarn that the present invention prepares, physical index: ultimate strength is 230 280cN, elongation at break is 250 300%；The PA66 undrawn yarn that the present invention prepares, Heat-tolerant index (240 DEG C, 4 minutes): ultimate strength reduces by 13 28%；Elongation at break reduces by 15 26%；The PA66 undrawn yarn that the present invention prepares, index is stable, and fiber number is uniform, and later process unwinding is good.
Description
Technical field
The present invention provides the spinning technique of a kind of PA66 undrawn yarn, belongs to spining technology field.
Background technology
PA66(nylon) undrawn yarn, for the yarn core of weft yarn for type fabric, can be used for preparing tyre cord, at present
The multifilament of mainly filament number 6 danier used in cord fabric industry, rear road adds man-hour by long filament plus certain twist,
Then plying is cord fabric thread, because there is the operation to long filament twisting in rear road, the most all uses straight yarn multifilament, i.e. individual thread
Between be the most parallel state.
When for the yarn core of weft yarn for type fabric, the spinning technique of PA66 undrawn yarn has the disadvantage that
(1) ultimate strength and elongation at break are relatively low；
(2) poor heat resistance, ultimate strength and elongation at break loss are bigger；
(3) fiber number is uneven, and ultimate strength and elongation at break are unstable；
(4) broken end of fiber is more, and element period only has 10 days；
(5) strand is easily jumped out, and causes the phenomenon without silk noil occur, occurs bigger without the probability of silk noil.
Summary of the invention
For solving the deficiency that prior art exists, the present invention provides the spinning technique of a kind of PA66 undrawn yarn, to realize
Following goal of the invention:
(1) the PA66 undrawn yarn that the present invention prepares, fiber number is 115-155dtex；
(2) the PA66 undrawn yarn that the present invention prepares, ultimate strength reaches 230-280cN, and elongation at break reaches 250-300%；
(3) the PA66 undrawn yarn that the present invention prepares, Heat-tolerant index (240 DEG C, 4 minutes): ultimate strength reduces 13-28%；Disconnected
Split percentage elongation and reduce 15-26%；
(4) the PA66 undrawn yarn that the present invention prepares, ultimate strength, the equal ＜ of percentage elongation CV value 8%, denier irregularity ＜ 3%；
(5) the PA66 undrawn yarn that the present invention prepares, broken end reduces 2 times, and element period extends 3 times, and element period is by original
10 days, extending to 30 days, qualification rate reaches more than 95%, PA66 undrawn yarn prepared by the present invention, end breakage rate≤10%；
(6), there is the probability ＜ 1% without silk noil in spinning technique of the present invention, and product row yielding reaches 102%.
For solving above-mentioned technical problem, the technical scheme that the present invention takes is as follows:
The spinning technique of a kind of PA66 undrawn yarn, described technique, including spinning, cooling molding；Described spinning, cooling molding,
Assembly preheating temperature is 313-324 DEG C；Dosing pump rotating speed is 12.0-16.0 rev/min.
The following is and the further of technique scheme is improved:
Described spinning, cooling molding, cross air blasting wind speed 1.17-1.36 meter per second, cross air blasting pathogenic wind-warm: 19-27 DEG C, the humidity of wind is
62-75%。
Described cross air blasting wind speed, preferably 1.27-1.31 meter per second；Cross air blasting pathogenic wind-warm, preferably 23.5-27.6 DEG C；
The humidity of described wind, preferably 67.4-71.7%；
Described spinning technique, also includes winding, described winding, upper draw-off godet frequency: 61-76HZ, winding speed: 979-995 rice/
Minute.
Described upper draw-off godet frequency, preferably 69.2-73.3 HZ, winding speed, preferably 987.2-991.9 m/min
Clock；
Described winding, lower draw-off godet frequency: 61-77HZ, friction roller frequency: 68-74HZ, reciprocal frequency of transverse moving: 57-66HZ.
Described lower draw-off godet frequency is preferably: 67.5-71.3HZ, and friction roller frequency is preferably: 69.5-72.7HZ, back and forth
Frequency of transverse moving is preferably: 59-62HZ.
Described winding, oil concentration is 12.8-14.4%, oil preparation oil applying rate: 0.75-0.95%；Range of regulation is at 0.32-
2.1 kilogram.
Described oil concentration, preferably 13.87-14.23%；
Described spinning technique, also includes melting；Described melted, spinning melt temperature 280-300 DEG C.
Described melted, use screw extruder to carry out extrusion molten；
Described extrusion molten, district's temperature is 297-311 DEG C；Two district's temperature are 287-302 DEG C.
Described extrusion molten, three district's temperature are 286-303 DEG C；Four district's temperature are 288-297 DEG C；Five district's temperature are 285-
300℃。
Described extrusion molten, flange temperature is 287-302 DEG C；Spin manifold temperature is 290-305 DEG C.
Described extrusion molten, preferred process conditions are: district's temperature is 302.4-305.9 DEG C；Two district's temperature are
293.8-296.4 DEG C, three district's temperature are 293.5-295.9 DEG C；Four district's temperature are 292.6-295.8 DEG C；Five district's temperature are
291.7-295.3 DEG C, flange temperature is 293.8-297.7 DEG C；Spin manifold temperature is 292.4-296.8 DEG C.
Described spinning technique, also includes being dried, and described dry, baking temperature 110-125 DEG C, drying time, 3.5-4.5 was little
Time, be dried vacuum be-0.07～-0.09MPa, be dried to cut into slices moisture be 750-900ppm.
Compared with prior art, beneficial effects of the present invention is as follows:
(1) the PA66 undrawn yarn that the present invention prepares, fiber number is 115-155dtex；For 26 elastic force weft yarn yarn cores；
(2) the PA66 undrawn yarn that the present invention prepares, physical index: ultimate strength is 230-280cN, elongation at break is 250-
300%；
(3) the PA66 undrawn yarn that the present invention prepares, Heat-tolerant index (240 DEG C, 4 minutes): ultimate strength reduces 13-28%；Disconnected
Split percentage elongation and reduce 15-26%；
(4) the PA66 undrawn yarn that the present invention prepares, index is stable, and fiber number is uniform, and later process unwinding is good, meets elastic force latitude
Yarn yarn core prescription, ultimate strength, the equal ＜ of percentage elongation CV value 8%, denier irregularity ＜ 3%；
(5) the PA66 undrawn yarn that the present invention prepares, broken end reduces 2 times, and element period extends 3 times, and element period is by original
10 days, extending to 30 days, qualification rate reaches more than 95%, PA66 undrawn yarn prepared by the present invention, end breakage rate≤10%；
(6) spinning technique of the present invention, improves product quality and row yielding, thoroughly solves to jump out problem because of strand and oil-free occurs
, there is the probability ＜ 1% without silk noil in the phenomenon of silk, and product row yielding reaches 102%.
Accompanying drawing explanation
Fig. 1 is PA66 winding tension self-checking device structural representation of the present invention；
Fig. 2 is the circuit controling drawing of PA66 winding tension self-checking device of the present invention.
In figure:
1-gas circuit；2-threeway；21-the second threeway；3-pressure regulator valve；4-electromagnetic valve；5-cylinder；6-winding head；7-friction roller.
Detailed description of the invention
Hereinafter the preferred embodiments of the present invention are illustrated, it should be appreciated that preferred embodiment described herein is only used
In the description and interpretation present invention, it is not intended to limit the present invention.
1 one kinds of fiber numbers of embodiment are the spinning technique of the PA66 undrawn yarn of 125 ± 10dtex
Comprise the following steps:
(1) material choice
By English Weida HV600 PA66 resin slicer, viscosity 3.0；
Described resin slicer, oxidation index (YI)≤-2, moisture content (ppm)≤3000, appearance requirement does not allow obvious black grain,
Overlength and adhesion section.
(2) it is dried
Being dried section with VC352 type rotary drum, drying process is as follows: baking temperature 115 DEG C, 4 hours drying times, is dried
Vacuum >=-0.08MPa, be dried to section moisture be 800ppm.
(3) melted
Spinning melt temperature 290 DEG C, uses screw extruder to carry out extrusion molten, extrusion molten parameter such as table 1 below.
The parameter of table 1 extrusion molten
(4) assembling components
Add 150 mesh stainless (steel) wires before spinneret, before stainless (steel) wire, make filter course with 60 mesh metal sands,
The specification of spinneret is 16 holes × 0.3mm × 0.6mm(draw ratio 1:2).
Described 0.3mm is aperture, 0.6mm hole length.
(5) spinning, cooling molding
Assembly preheating temperature: 314 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 12.2 revs/min, cross air blasting wind
Speed 1.24 meter per seconds, cross air blasting pathogenic wind-warm: 21 DEG C, the humidity of wind is 62%.
(6) winding
Strand enters up-coiler through cross air blasting cooling molding by interlayer heat pipe path；Upper draw-off godet frequency: 63.4HZ, under lead
Wire tray frequency: 64.5HZ, friction roller frequency: 65.6HZ, reciprocal frequency of transverse moving: 59.7HZ, winding speed: 982.4 ms/min,
Oil concentration (this oil preparation of bamboo): 13.3%, oil preparation oil applying rate: 0.82%；When spinning fine-denier PA66UDY, spinning cake top layer easily occurs
Sleave, grinds silk phenomenon, and impact unwinding, qualification rate is about 65%；Connect automatic pressure regulating device at cylinder outlet, regulate winding head
Contact pressure, repiece pressure automatically switches with using pressure, and range of regulation is at 0.3-2 kilogram, and coiling and molding is obviously improved, qualified
Rate reaches more than 95%.
Described up-coiler, connects at cylinder outlet and installs PA66 undrawn yarn winding tension self-checking device additional,
As shown in Figure 1, described PA66 undrawn yarn winding tension self-checking device, including gas circuit 1, described gas circuit 1 connects
Having threeway 2, one end connection pressure regulator valve 3 of described threeway 2, the other end connection electromagnetic valve 4 of institute's threeway 2, described electromagnetic valve 4 connects
The second threeway 21, described second threeway 21 is had to connect pressure regulator valve 3, the other end connection cylinder 5 of described second threeway 21, described gas
The piston rod of cylinder 5 connects winding head 6, and the side of described winding head 6 is provided with friction roller 7.
As shown in Figure 2, described PA66 undrawn yarn winding tension self-checking device, its control circuit includes electromagnetic valve
4, one end of described electromagnetic valve 4 connects display lamp HL, and the other end of described electromagnetic valve 4 connects time relay J S, described
The other end of time relay JS connects has rotary switch SA1, described rotary switch SA1 connection to have short-circuiting device QF, described open circuit
Device QF connects with live wire L, and electromagnetic valve 4 connects with zero line N.
During repiece, electromagnetic valve 4 is opened, winding head air pressure 0.2MPA, and within 5 minutes, rear electromagnetic valve 4 is closed, winding head stable gas pressure
At 0.03MPA, the pressure of gas circuit is at 0.2Mpa.
Described PA66 undrawn yarn winding tension self-checking device, can regulate winding head contact pressure, repiece pressure
Automatically switching with using pressure, range of regulation is at 0.3-2 kilogram, and coiling and molding is obviously improved, and qualification rate is more than 95%.
2 one kinds of fiber numbers of embodiment are the spinning technique of the PA66 undrawn yarn of 125 ± 10dtex
On the basis of embodiment 1, only changing step (2), (3), (5), the parameter of (6), remaining changes as follows with embodiment 1:
(2) it is dried
With VC352 type rotary drum, section is dried；
Drying process is as follows: baking temperature 118 DEG C, 4.1 hours drying times, is dried vacuum >=-0.083MPa, is dried to cutting
The moisture of sheet is 820ppm.
(3) melted
Spinning melt temperature 292 DEG C, uses screw extruder to carry out extrusion molten, extrusion molten parameter such as table 2 below.
The parameter of table 2 extrusion molten
(5) spinning, cooling molding
Assembly preheating temperature: 318.7 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 12.9 revs/min, cross air blasting
Wind speed 1.29 meter per second, cross air blasting pathogenic wind-warm: 23.7 DEG C, the humidity of wind is 67%.
(6) winding
Strand enters up-coiler through cross air blasting cooling molding by interlayer heat pipe path,
Upper draw-off godet frequency: 68.9HZ, lower draw-off godet frequency: 66.6HZ, friction roller frequency: 67.3HZ, reciprocal frequency of transverse moving:
60.7HZ, winding speed: 985.7 ms/min, oil concentration (this oil preparation of bamboo): 14.2%, oil preparation oil applying rate: 0.89%；At spinning
During fine-denier PA66UDY, easily there is sleave in spinning cake top layer, grinds silk phenomenon, and impact unwinding, qualification rate is about 65%；At cylinder outlet
Connecing automatic pressure regulating device, regulate winding head contact pressure, repiece pressure automatically switches with using pressure, and range of regulation is at 0.3-
2 kilograms, coiling and molding is obviously improved, and qualification rate reaches more than 95%.
3 one kinds of fiber numbers of embodiment are the spinning technique of the PA66 undrawn yarn of 125 ± 10dtex
On the basis of embodiment 1, only changing step (2), (3), (5), the parameter of (6), remaining changes as follows with embodiment 1:
(2) it is dried
With VC352 type rotary drum, section is dried；
Drying process is as follows: baking temperature 127 DEG C, 4.5 hours drying times, is dried vacuum >=-0.087MPa, is dried to cutting
The moisture of sheet is 900ppm.
(3) melted
Spinning melt temperature 301 DEG C, uses screw extruder to carry out extrusion molten, extrusion molten parameter such as table 3 below.
The parameter of table 3 extrusion molten
(5) spinning, cooling molding
Assembly preheating temperature: 32.8 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 13.47 revs/min, cross air blasting
Wind speed 1.38 meter per second, cross air blasting pathogenic wind-warm: 29.4 DEG C, the humidity of wind is 78%.
(6) winding
Strand enters up-coiler through cross air blasting cooling molding by interlayer heat pipe path；
Upper draw-off godet frequency: 74.8HZ, lower draw-off godet frequency: 73.5HZ, friction roller frequency: 74.6HZ, reciprocal frequency of transverse moving:
63.5HZ, winding speed: 995.5 ms/min, oil concentration (this oil preparation of bamboo): 14.45%, oil preparation oil applying rate: 0.94%；Spinning
During fine-denier PA66UDY processed, easily there is sleave in spinning cake top layer, grinds silk phenomenon, and impact unwinding, qualification rate is about 65%；Go out at cylinder
Mouth connects automatic pressure regulating device, regulates winding head contact pressure, and repiece pressure automatically switches with using pressure, and range of regulation exists
0.3-2 kilogram, coiling and molding is obviously improved, and qualification rate reaches more than 95%.
PA66 undrawn yarn prepared by above-described embodiment 1-3, quality index such as table 4.
The quality index of PA66 undrawn yarn prepared by table 4 embodiment 1-3
4 one kinds of fiber numbers of embodiment are the spinning technique of the PA66 undrawn yarn of 145 ± 10dtex
(1) material choice
By English Weida HV600 PA66 resin slicer, viscosity 3.0；Oxidation index (YI)≤-2, moisture content (ppm)≤3000, outward
See and require not allow obvious black grain, overlength and adhesion section.
(2) it is dried
With VC352 type rotary drum, section is dried；
Drying process is as follows: baking temperature 110 DEG C, 3.5 hours drying times, and being dried vacuum is-0.07MPa, is dried to cutting
The moisture of sheet is 750ppm.
(3) melted
Spinning melt temperature 282 DEG C, uses screw extruder to carry out extrusion molten, extrusion molten parameter such as table 5 below.
The parameter of table 5 extrusion molten
(4) assembling components
Add 150 mesh stainless (steel) wires before spinneret, before stainless (steel) wire, make filter course with 60 mesh metal sands,
The specification of spinneret (paying spinneret and assembly drawing) is 16 hole × 0.3 mm × 0.6mm(draw ratio 1:2).
Described 0.3mm is aperture, 0.6mm hole length；
(5) spinning, cooling molding
Assembly preheating temperature: 312 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 14.2 revs/min, cross air blasting wind
Speed 1.17 meter per seconds, cross air blasting pathogenic wind-warm: 18.8 DEG C, the humidity of wind is 61%.
(6) winding
Strand enters up-coiler through cross air blasting cooling molding by interlayer heat pipe path；
Upper draw-off godet frequency: 63.5HZ, lower draw-off godet frequency: 63.8HZ, friction roller frequency: 64.1HZ, reciprocal frequency of transverse moving:
55.8HZ, winding speed: 976.1 ms/min, oil concentration (this oil preparation of bamboo): 13.4%, oil preparation oil applying rate: 0.81%.
5 one kinds of fiber numbers of embodiment are the spinning technique of the PA66 undrawn yarn of 145 ± 10dtex
On the basis of embodiment 4, only changing step (2), (3), (5), the parameter of (6), remaining changes as follows with embodiment 4:
(2) it is dried
With VC352 type rotary drum, section is dried；
Drying process is as follows: baking temperature 115 DEG C, 3.8 hours drying times, and being dried vacuum is-0.077MPa, is dried to cutting
The moisture of sheet is 775ppm.
(3) melted
Carry out screw rod apparatus for melt spinning improvement part with Changshu chemical fiber machinery SKV102A to have: path, casing, gradually cold-zone, side-blown
Wind adjusting means；
Spinning melt temperature 289 DEG C, uses screw extruder to carry out extrusion molten, extrusion molten parameter such as table 6 below.
The parameter of table 6 extrusion molten
(5) spinning, cooling molding
Assembly preheating temperature: 321 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 15.2 revs/min, cross air blasting wind
Speed 1.27 meter per seconds, cross air blasting pathogenic wind-warm: 22.4 DEG C, the humidity of wind is 68.9%.
(6) winding
Strand enters up-coiler through cross air blasting cooling molding by interlayer heat pipe path；
Upper draw-off godet frequency: 66.7HZ, lower draw-off godet frequency: 68.6HZ, friction roller frequency: 66.4HZ, reciprocal frequency of transverse moving:
58.6HZ, winding speed: 987.5 ms/min, oil concentration (this oil preparation of bamboo): 13.9%, oil preparation oil applying rate: 0.85%.
6 one kinds of fiber numbers of embodiment are the spinning technique of the PA66 undrawn yarn of 145 ± 10dtex
On the basis of embodiment 4, only changing step (2), (3), (5), the parameter of (6), remaining changes as follows with embodiment 4:
(2) it is dried
With VC352 type rotary drum, section is dried；
Drying process is as follows: baking temperature 126 DEG C, 4.6 hours drying times, and being dried vacuum is-0.086MPa, is dried to cutting
The moisture of sheet is 905ppm.
(3) melted
Spinning melt temperature 305 DEG C, uses screw extruder to carry out extrusion molten, extrusion molten parameter such as table 7 below.
The parameter of table 7 extrusion molten
(5) spinning, cooling molding
Assembly preheating temperature: 325.2 DEG C, dosing pump specification: 2.4ml/r × 2, dosing pump rotating speed: 15.5 revs/min, cross air blasting
Wind speed 1.38 meter per second, cross air blasting pathogenic wind-warm: 28.4 DEG C, the humidity of wind is 75.7%.
(6) winding
Strand enters up-coiler through cross air blasting cooling molding by interlayer heat pipe path；
Upper draw-off godet frequency: 72.5HZ, lower draw-off godet frequency: 71.9HZ, friction roller frequency: 72.9HZ, reciprocal frequency of transverse moving:
64.3HZ, winding speed: 991.5 ms/min, oil concentration (this oil preparation of bamboo): 14.51%, oil preparation oil applying rate: 0.92%.
The quality index of PA66 undrawn yarn prepared by table 8 embodiment 4-6
Except as otherwise noted, the percent employed in the present invention is percetage by weight, ratio of the present invention, is matter
Amount ratio.
The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described.The skill of the industry
The art personnel simply explanation it should be appreciated that the present invention is not restricted to the described embodiments, described in above-described embodiment and description
The principle of the present invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these
Changes and improvements both fall within scope of the claimed invention.Claimed scope by appending claims and
Its equivalent defines.
Claims (10)
1. the spinning technique of a PA66 undrawn yarn, it is characterised in that: described technique, including spinning, cooling molding；Described spin
Silk, cooling molding, assembly preheating temperature is 313-324 DEG C；Dosing pump rotating speed is 12.0-16.0 rev/min.
The spinning technique of a kind of PA66 undrawn yarn the most according to claim 1, it is characterised in that: described spinning, cooling
Molding, cross air blasting wind speed 1.17-1.36 meter per second, cross air blasting pathogenic wind-warm: 19-27 DEG C, the humidity of wind is 62-75%.
The spinning technique of a kind of PA66 undrawn yarn the most according to claim 1, it is characterised in that: described technique, also wrap
Include winding, described winding, upper draw-off godet frequency: 61-76HZ, winding speed: 979-995 m/min.
The spinning technique of a kind of PA66 undrawn yarn the most according to claim 3, it is characterised in that: described winding,
Lower draw-off godet frequency: 61-77HZ, friction roller frequency: 68-74HZ, reciprocal frequency of transverse moving: 57-66HZ.
The spinning technique of a kind of PA66 undrawn yarn the most according to claim 3, it is characterised in that: described winding,
Oil concentration is 12.8-14.4%, oil preparation oil applying rate: 0.75-0.95%；Range of regulation is at 0.32-2.1 kilogram.
The spinning technique of a kind of PA66 undrawn yarn the most according to claim 1, it is characterised in that: described technique, also wrap
Include melted；Described melted, spinning melt temperature 280-300 DEG C.
The spinning technique of a kind of PA66 undrawn yarn the most according to claim 6, it is characterised in that: described melted,
Screw extruder is used to carry out extrusion molten；Described extrusion molten, district's temperature is 297-311 DEG C；Two district's temperature are 287-302
℃。
The spinning technique of a kind of PA66 undrawn yarn the most according to claim 6, it is characterised in that: described extrusion molten,
Three district's temperature are 286-303 DEG C；Four district's temperature are 288-297 DEG C；Five district's temperature are 285-300 DEG C.
The spinning technique of a kind of PA66 undrawn yarn the most according to claim 6, it is characterised in that: described extrusion molten,
Flange temperature is 287-302 DEG C；Spin manifold temperature is 290-305 DEG C.
The spinning technique of a kind of PA66 undrawn yarn the most according to claim 1, it is characterised in that: described technique, also wrap
Include dry, described be dried, baking temperature 110-125 DEG C, 3.5-4.5 hour drying time, be dried vacuum be-0.07～-
0.09MPa, be dried to section moisture be 750-900ppm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706565A (en) * | 2019-02-18 | 2019-05-03 | 海安县中祥线业有限公司 | More feather weight are without tie lines preparation process |
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Application publication date: 20161116 |