CN106120000A - A kind of heat-resist PA66 undrawn yarn and production technology thereof - Google Patents
A kind of heat-resist PA66 undrawn yarn and production technology thereof Download PDFInfo
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- CN106120000A CN106120000A CN201610729871.6A CN201610729871A CN106120000A CN 106120000 A CN106120000 A CN 106120000A CN 201610729871 A CN201610729871 A CN 201610729871A CN 106120000 A CN106120000 A CN 106120000A
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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
- D01D1/00—Treatment of filament-forming or like material
-
- 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
- D01D1/06—Feeding liquid to the spinning head
- D01D1/09—Control of pressure, temperature or feeding rate
-
- 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
-
- 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
- D01D5/088—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
- 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
- D01D7/00—Collecting the newly-spun products
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- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Artificial Filaments (AREA)
Abstract
The present invention provides a kind of heat-resist PA66 undrawn yarn, described undrawn yarn, and fiber number is 230 ± 20dtex；The present invention also provides for the production technology of a kind of heat-resist PA66 undrawn yarn, and described production technology, including spinning, cooling molding；Described spinning, cooling molding, assembly preheating temperature is 316 326 DEG C；Dosing pump rotating speed is 22.5 23.5 revs/min；The PA66 undrawn yarn that the present invention prepares, fiber number is 230 ± 20dtex；Ultimate strength reaches 350 450cN, and elongation at break reaches 230 330%；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 a kind of heat-resist PA66 undrawn yarn and production technology thereof, can be used for 20 elastic force weft yarns
Yarn core, belongs to spining technology field.
Background technology
Nylon (PA) 66 undrawn yarn, as the yarn core of elastic force weft yarn, can be used for preparing tyre cord, and cord fabric is wheel
The main framework material of tire cover tire, the overall performance for tire that promotes of cord fabric performance improves the most necessary, but because existing
With the presence of the certain defect of nylon66 fiber undrawn yarn, cause the aspects such as the intensity of tyre cord, elasticity, thermostability to exist not
Foot；
Prior art, when spinning PA66 undrawn yarn, has the disadvantage that
(1) ultimate strength and elongation at break are the most relatively low；
(2) poor heat resistance；
(3) index is unstable, and fiber number is uneven；
(4) in prior art, end breakage rate is 30%, and assembly uses the cycle to be 10 days；
(5) silk pressing rod in use auto-changing angles and positions below oil nozzle, strand is easily jumped out at oil nozzle, often goes out
Now without silk noil, affect product quality and row yielding.
Summary of the invention
For solving the deficiency that prior art exists, the present invention provides a kind of heat-resist PA66 undrawn yarn and life thereof
Production. art, to realize following goal of the invention:
(1) the PA66 undrawn yarn that the present invention prepares, fiber number is 230 ± 20dtex；
(2) the PA66 undrawn yarn that the present invention prepares, ultimate strength reaches 350-450cN, and elongation at break reaches 230-330%,
(3) the PA66 undrawn yarn that the present invention prepares, Heat-tolerant index (240 DEG C, 4 minutes): ultimate strength reduces 11.8-
17.5%；Elongation at break reduces 12.1-20%；
(4) the PA66 undrawn yarn that the present invention prepares, index is stable, and fiber number is uniform, denier irregularity≤3%；Strongly CV≤8%；
Elongation at break CV≤8%；
(5) the PA66 undrawn yarn that the present invention prepares, broken end reduces 2 times, and element period extends 3 times, reaches 30 days, and qualification rate reaches
More than 95%, end breakage rate≤10%；
(6), there is the probability ＜ 1% without silk noil in production technology of the present invention, and row yielding reaches 102%.
For solving above-mentioned technical problem, the technical scheme that the present invention takes is as follows:
A kind of heat-resist PA66 undrawn yarn, described undrawn yarn, fiber number is 230 ± 20dtex.
The following is and the further of technique scheme is improved:
Described undrawn yarn, ultimate strength reaches 350-450cN, and elongation at break reaches 230-330%；Ultimate strength CV≤8%；Fracture
Percentage elongation CV≤8%.
The production technology of a kind of heat-resist PA66 undrawn yarn, described production technology, including spinning, cooling molding；
Described spinning, cooling molding, assembly preheating temperature is 316-326 DEG C；Dosing pump rotating speed is 22.5-23.5 rev/min.
Described assembly preheating temperature is preferably 319-322 DEG C；Dosing pump rotating speed is 22.8-23.1 rev/min.
Described spinning, cooling molding, cross air blasting wind speed 1.26-1.33 meter per second, cross air blasting pathogenic wind-warm: 22-28 DEG C, wind wet
Degree is 60-81%.
Described cross air blasting wind speed is preferably 1.29-1.31 meter per second, and cross air blasting pathogenic wind-warm is preferably: 24-27 DEG C；
Described production technology, also includes winding, described winding, reciprocal frequency of transverse moving: 55-69HZ, winding speed: 982-995 rice/
Minute.
Described winding, reciprocal frequency of transverse moving is preferably 59-63 HZ, and winding speed is preferably 987-992 m/min.
Described winding, upper draw-off godet frequency: 62-75HZ, lower draw-off godet frequency: 67-72 HZ, friction roller frequency: 66-
76HZ, oil concentration is 13.3-14.5%, oil preparation oil applying rate: 0.85-0.93%.
Described oil concentration is preferably 13.8-14.2%.
Described upper draw-off godet frequency is preferably: 67-70HZ, and lower draw-off godet frequency is preferably: 70-72HZ, friction roller frequency
It is preferably: 68-71HZ.
Described production technology, also includes melting；Described melted, spinning melt temperature 282-306 DEG C；Described melted, use
Screw extruder carries out extrusion molten；Described extrusion molten, district's temperature is 297-310 DEG C；Two district's temperature are 288-303 DEG C；
Three district's temperature are 286-304 DEG C；Four district's temperature are 287-303 DEG C；Five district's temperature are 285-303 DEG C；Flange temperature is 284-304
℃；Spin manifold temperature is 287-305 DEG C.
Described spinning melt temperature is preferably 292-297 DEG C；
Described extrusion molten, is preferably: district's temperature is 303-307 DEG C；Two district's temperature are 293-299 DEG C；Three district's temperature are
295-298℃；Four district's temperature are 293-298 DEG C；Five district's temperature are 292-297 DEG C；Flange temperature is 294-299 DEG C；Casing temperature
Degree is for 295-299 DEG C.
Described production technology, also includes assembling components；Described assembling components, adds 150 mesh stainless (steel) wires 5 before spinneret 7,
Before stainless (steel) wire 5, make filter course with 60 mesh metal sands；Described spinneret 7, specification is 22 holes × 0.3mm × 0.6mm；
Described production technology, also includes material choice and is dried；Described material choice, cuts with English Weida HV600 PA66 resin
Sheet, viscosity 2.65-3.1.0；Described resin slicer, oxidation index≤-2, moisture content≤3000 ppm, outward appearance is without black grain, overlength
And adhesion section；
Described dry, baking temperature 111-128 DEG C, 3.4-4.5 hour drying time, it is dried vacuum >=-0.09MPa, is dried
Moisture to section is 775-910ppm.
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 230 ± 20dtex；For 20 elastic force weft yarn yarn cores；
(2) the PA66 undrawn yarn that the present invention prepares, physical index: ultimate strength is 350-450cN, strongly CV is 6.0-8%,
Elongation at break is 230-330%, and elongation at break CV is 5.6-8%；
(3) the PA66 undrawn yarn that the present invention prepares, Heat-tolerant index (240 DEG C, 4 minutes): ultimate strength 280-380cN；Damage
Losing 15-22%, elongation at break is 160-260%, loses 20-25%；
(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, denier irregularity is 1.56-3%；
(5) the PA66 undrawn yarn that the present invention prepares, broken end reduces 2 times, and element period extends 3 times, reaches 30 days, and qualification rate reaches
More than 95%, end breakage rate is 8.2-10%；
(6) spinning technique of the present invention, thoroughly solves strand and jumps out problem, stops occur without silk noil, improve product quality with
Row yielding, thoroughly solves to jump out problem because of strand and the phenomenon without silk noil occurs, the probability ＜ 1% without silk noil occur, and row yielding reaches
102%。
Accompanying drawing explanation
Fig. 1 is the structural representation of spinneret of the present invention；
Fig. 2 is the structural representation of plectrum of the present invention；
Fig. 3 is the structural representation of fast replacing device of the present invention.
In figure:
1-connects post；2-presses sheet；3-pressing hole；4-spray webbing hole slot；5-stainless (steel) wire；6-spinneret 7 installing hole；7-spinneret 7；
11-shift fork；12-U shape fork body；13-shifting fork bar；14-presses film perforation；31-fixes axle；32-axle sleeve；33-rotating shaft；34-articulated column.
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.
The production technology of the PA66 undrawn yarn that embodiment 1 one kinds is heat-resist
Comprise the following steps:
(1) material choice
Use PA66 resin slicer, viscosity 2.65-3.1；
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
With VC352 type rotary drum, section is dried；
Drying process is as follows: baking temperature 120 DEG C, 4 hours drying times, and being dried vacuum is-0.078MPa, is dried to section
Moisture be 850ppm.
(3) extrusion molten
Spinning melt temperature 295 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 5 before spinneret 7, before stainless (steel) wire 5, make filter course, the rule of spinneret 7 with 60 mesh metal sands
Lattice are 22 hole × 0.3 × 0.6mm(draw ratio 1:2)；
Described 0.3mm is aperture, 0.6mm hole length.
Being provided with spray webbing hole slot 4 on described spinneret 7, the surface of described spray webbing hole slot 4 is covered with stainless (steel) wire 5, described not
The mesh number of rust steel mesh 5 is 150 mesh.
Spinneret 7 installing hole 6 it is provided with on described spinneret 7.
Being provided with shift fork 11 between described spray webbing hole slot 4 and stainless (steel) wire 5, described shift fork 11 has U-shaped fork body 12, U-shaped
Fork body 12 connects has shifting fork bar 13, the end of shifting fork bar 13 to be provided with by sheet 2, and described had by film perforation 14 by sheet 2.
Described spinneret 7 is provided with pressing hole 3,
Being fixedly installed fixing axle 31 in described pressing hole 3, described fixing axle 31 is socketed with axle sleeve 32, described axle sleeve 32 is arranged
Having rotating shaft 33, described rotating shaft 33 is hinged with hinged shifting fork bar 13 by articulated column 34.
Press sheet 2, stainless (steel) wire 5 can be tilted, thus move to other positions, convenient dismounting.
(5) spinning, cooling molding
Assembly preheating temperature: 320 DEG C, dosing pump specification: 2.4ML/r × 2, dosing pump rotating speed: 23 revs/min, cross air blasting wind speed
1.3 meter per seconds, cross air blasting pathogenic wind-warm: 25 DEG C, rheumatism 70%.
(6) winding
Strand enters up-coiler through cross air blasting cooling molding by interlayer heat pipe path；Upper draw-off godet frequency: 70HZ, lower seal wire
Dish frequency: 70HZ, friction roller frequency: 70HZ, reciprocal frequency of transverse moving: 64HZ, winding speed: 989 ms/min, oil concentration:
14%, oil preparation oil applying rate: 0.9%.
The production technology of the PA66 undrawn yarn that embodiment 2 one kinds is heat-resist
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 111 DEG C, 3.4 hours drying times, and being dried vacuum is-0.075MPa, is dried to cutting
The moisture of sheet is 775ppm.
(3) extrusion molten
Spinning melt temperature 282 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: 316 DEG C, dosing pump specification: 2.4ML/r × 2, dosing pump rotating speed: 22.5 revs/min, cross air blasting wind
Speed 1.26 meter per seconds, cross air blasting pathogenic wind-warm: 22 DEG C, rheumatism 60%.
(6) winding
Strand enters up-coiler, upper draw-off godet frequency: 62HZ, lower seal wire through cross air blasting cooling molding by interlayer heat pipe path
Dish frequency: 67HZ, friction roller frequency: 66 HZ, reciprocal frequency of transverse moving: 55HZ, winding speed: 982 ms/min, oil concentration
(this oil preparation of bamboo): 13.3%, oil preparation oil applying rate: 0.85%.
The production technology of the PA66 undrawn yarn that embodiment 3 one kinds is heat-resist
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 117 DEG C, 3.7 hours drying times, dry
Dry vacuum is-0.077MPa, be dried to section moisture be 835ppm.
(3) extrusion molten
Spinning melt temperature 292 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: 319 DEG C, dosing pump specification: 2.4ML/r × 2, dosing pump rotating speed: 22.8 revs/min, cross air blasting wind
Speed 1.28 meter per seconds, cross air blasting pathogenic wind-warm: 23 DEG C, rheumatism 68%.
(6) winding
Strand through cross air blasting cooling molding by interlayer heat pipe path enter up-coiler, upper draw-off godet frequency: 68.7HZ, under lead
Wire tray frequency: 67.9HZ, friction roller frequency: 69 HZ, reciprocal frequency of transverse moving: 59HZ, winding speed: 987.5 ms/min, oil
Agent concentration: 13.86%, oil preparation oil applying rate: 0.88%.
The production technology of the PA66 undrawn yarn that embodiment 4 one kinds is heat-resist
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 128 DEG C, 4.5 hours drying times, and being dried vacuum is-0.082MPa, is dried to cutting
The moisture of sheet is 910ppm.
(3) extrusion molten
Spinning melt temperature 306 DEG C, uses screw extruder to carry out extrusion molten, extrusion molten parameter such as table 4 below.
The parameter of table 4 extrusion molten
(5) spinning, cooling molding
Assembly preheating temperature: 326 DEG C, dosing pump specification: 2.4ML/r × 2, dosing pump rotating speed: 23.5 revs/min, cross air blasting wind
Speed 1.33 meter per seconds, cross air blasting pathogenic wind-warm: 28 DEG C, rheumatism 80%.
(6) winding
Strand enters up-coiler, upper draw-off godet frequency: 75HZ, lower seal wire through cross air blasting cooling molding by interlayer heat pipe path
Dish frequency: 72HZ, friction roller frequency: 76 HZ, reciprocal frequency of transverse moving: 69HZ, winding speed: 995 ms/min, oil concentration
(this oil preparation of bamboo): 14.5%, oil preparation oil applying rate: 0.93%.
PA66 undrawn yarn prepared by above-described embodiment 1-4, quality index such as table 5.
The quality index of PA66 undrawn yarn prepared by table 5 present invention
As known from Table 5, embodiment 3 is preferred embodiment.
The concentration single factor analysis experiment of embodiment 5 oil preparation
The preparation method of employing PA66 undrawn yarn described in embodiment 3, only changes step (6) winding, the concentration of oil preparation, carries out
Single factor analysis is tested, and the results are shown in Table 6.
The concentration single factor analysis experiment of table 6 oil preparation
Tested by above-mentioned single factor analysis, it is known that, embodiment 3 and embodiment 8 are preferred embodiments, and embodiment 3 is the most real
Execute example；I.e. step (6) winding, the concentration of oil preparation is preferably 13.8-14.2%；
The PA66 undrawn yarn of described embodiment 8 preparation, fiber number is 240dtex.
The reciprocal frequency of transverse moving of embodiment 11 and winding speed optimization experiment
Use the preparation method of PA66 undrawn yarn described in embodiment 3, only change step (6) winding, reciprocal frequency of transverse moving and
Winding speed, carries out double factor analysis experiment, the results are shown in Table 7.
The reciprocal frequency of transverse moving of table 7 and the experiment of winding speed double factor analysis
Tested by above-mentioned single factor analysis, it is known that, embodiment 3 and embodiment 14 are preferred embodiments, and embodiment 14 is most preferably
Embodiment；I.e. step (6) winding, reciprocal frequency of transverse moving is preferably 59-63 HZ, and winding speed is preferably 987-992 m/min.
The PA66 undrawn yarn of described embodiment 14 preparation, fiber number is 238dtex.
Except as otherwise noted, the percent employed in the present invention is percetage by weight, ratio of the present invention, all
For mass 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. a heat-resist PA66 undrawn yarn, it is characterised in that: described undrawn yarn, fiber number is 230 ± 20dtex.
A kind of heat-resist PA66 undrawn yarn the most according to claim 1, it is characterised in that: described undrawn yarn,
Ultimate strength reaches 350-450cN, and elongation at break reaches 230-330%；Ultimate strength CV≤8%；Elongation at break CV≤8%.
3. the production technology of a heat-resist PA66 undrawn yarn, it is characterised in that: described production technology, including spinning,
Cooling molding；Described spinning, cooling molding, assembly preheating temperature is 316-326 DEG C；Dosing pump rotating speed is 22.5-23.5 rev/min
Clock.
The production technology of a kind of heat-resist PA66 undrawn yarn the most according to claim 3, it is characterised in that: institute
Stating spinning, cooling molding, cross air blasting wind speed 1.26-1.33 meter per second, cross air blasting pathogenic wind-warm: 22-28 DEG C, the humidity of wind is 60-81%.
The production technology of a kind of heat-resist PA66 undrawn yarn the most according to claim 3, it is characterised in that: institute
State production technology, also include winding, described winding, reciprocal frequency of transverse moving: 55-69HZ, winding speed: 982-995 m/min.
The production technology of a kind of heat-resist PA66 undrawn yarn the most according to claim 5, it is characterised in that: institute
Stating winding, reciprocal frequency of transverse moving is preferably 59-63 HZ, and winding speed is preferably 987-992 m/min.
The production technology of a kind of heat-resist PA66 undrawn yarn the most according to claim 5, it is characterised in that: institute
State winding, upper draw-off godet frequency: 62-75HZ, lower draw-off godet frequency: 67-72 HZ, friction roller frequency: 66-76HZ, oil concentration
For 13.3-14.5%, oil preparation oil applying rate: 0.85-0.93%.
The production technology of a kind of heat-resist PA66 undrawn yarn the most according to claim 7, it is characterised in that: institute
State oil concentration and be preferably 13.8-14.2%.
The production technology of a kind of heat-resist PA66 undrawn yarn the most according to claim 3, it is characterised in that: institute
State production technology, also include melting；Described melted, spinning melt temperature 282-306 DEG C；Described melted, use screw extruder
Carry out extrusion molten；Described extrusion molten, district's temperature is 297-310 DEG C；Two district's temperature are 288-303 DEG C；Three district's temperature are
286-304℃；Four district's temperature are 287-303 DEG C；Five district's temperature are 285-303 DEG C；Flange temperature is 284-304 DEG C；Casing temperature
Degree is for 287-305 DEG C.
The production technology of a kind of heat-resist PA66 undrawn yarn the most according to claim 3, it is characterised in that: institute
State production technology, also include assembling components；Described assembling components, adds 150 mesh stainless (steel) wires 5, at stainless (steel) wire 5 before spinneret 7
Before, make filter course with 60 mesh metal sands；Described spinneret 7, specification is 22 holes × 0.3mm × 0.6mm；
Described production technology, also includes material choice and is dried；Described material choice, cuts with English Weida HV600 PA66 resin
Sheet, viscosity 2.65-3.1.0；Described resin slicer, oxidation index≤-2, moisture content≤3000 ppm, outward appearance is without black grain；
Described dry, baking temperature 111-128 DEG C, 3.4-4.5 hour drying time, it is dried vacuum >=-0.09MPa, is dried
Moisture to section is 775-910ppm.
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| US3651201A (en) * | 1968-08-21 | 1972-03-21 | Monsanto Co | High-elongation-and-tenacity nylon tire yarn |
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