CN109295513A - A kind of method that melt-spun-wet spinning technology prepares super High-strength low-shrinkage polypropylene filament yarn - Google Patents
A kind of method that melt-spun-wet spinning technology prepares super High-strength low-shrinkage polypropylene filament yarn Download PDFInfo
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- CN109295513A CN109295513A CN201811543109.4A CN201811543109A CN109295513A CN 109295513 A CN109295513 A CN 109295513A CN 201811543109 A CN201811543109 A CN 201811543109A CN 109295513 A CN109295513 A CN 109295513A
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- rollers
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Classifications
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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
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
- D01D5/0885—Cooling filaments, threads or the like, leaving the spinnerettes by means of a liquid
-
- 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
- D01D10/02—Heat treatment
-
- 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
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
- D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins
- D01F6/06—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins from polypropylene
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Artificial Filaments (AREA)
Abstract
The present invention relates to the methods that a kind of melt-spun-wet spinning technology prepares super High-strength low-shrinkage polypropylene filament yarn.The present invention is rapidly cooled the tow sprayed from spinneret using cooling trough, instead of the air-cooled super High-strength low-shrinkage polypropylene filament yarn of preparation of existing cross air blasting, crystallization is generated between 120~130 DEG C to effectively avoid tow, avoid influence of the resulting crystallization to orientation process is stretched, the consistency for stretching orientation is improved, to improve the polyacrylic degree of orientation to realize the raising of intensity.Meanwhile being produced using stretching at a slow speed, so that polypropylene filament yarn produced is had the performance of super high-strength low-shrinkage, intensity >=9.0g/D, elongation at break≤20%, to expand the purposes of polypropylene filament yarn.
Description
Technical field
The present invention relates to the wet processings that a kind of melt spinning solvent is quickly cooled down, and are drawn at a slow speed by horizontal-type stretching machine
Stretch a kind of method for the polypropylene filament yarn for producing super high-strength low-shrinkage.
Background technique
It is to spin to produce by a step producing high-strength polypropylene filament yarn at present all, cross air blasting is air-cooled, and high speed stretching is produced
Polypropylene filament yarn intensity in 7.0g/D or so, and elongation at break is 25% or so.Because air-cooled inhomogeneous cooling is even, produced
In journey often broken end, lousiness the disadvantages of, and intensity has differed certain distance with terylene.The super high strength yarn intensity >=9.0g/D of terylene,
Elongation at break is between 12~20%；And polypropylene fibre have the advantages that it is acidproof, alkaline-resisting, light, therefore, if can produce a kind of super
The polypropylene industrial yarn of high-strength performance indicator up to dacron thread can play the good characteristic of polypropylene fibre, and can develop the change of degradation environment protection type
Fine product is a much progress, has expanded the purposes of polypropylene filament yarn, has far-reaching social benefit and good prospect.
Summary of the invention
The purpose of the present invention is to provide a kind of melt-spun-wet spinning technologies to prepare super High-strength low-shrinkage polypropylene filament yarn
Method.
The present invention, including following technique:
(1) it selects to melt and refers to the polypropylene chip for being 4~20, pour into drying in continuous drier, it is 60~90 DEG C of drying temperature, dry
Time 1~3 hour, moisture content≤0.01wt%；
(2) dried PP raw material is flowed into melt in screw extruder and be mediated, and cuts into the melt of viscous consistency, good fluidity,
In pressure >=7.0MPa of extruder, it is sent into the component in manifold by metering pump-metered, component pressure 5~10MPa item
Spinneret is carried out under part；
(3) at 220~260 DEG C, condition of spinning manifold temperature is controlled at 220~240 DEG C for extruder temperature control；
(4) tow through spinneret spinning, into being cooled by water in cooling trough, water temperature control at 12~20 DEG C, spinneret from
3~10mm of water surface distance；
(5) tow after being cooled by water, uniformly oils by oiling device, wherein the oil is water-oil mixture, and water: oil is 3
~10:1, weight ratio；
(6) tow after oiling enters the stretching of 4th area horizontal-type stretching Ji Fen, and total draw ratio is 8~15 times, main to stretch again
Number is placed on 1st area and 2nd area, and to be sufficiently tensile orientation, 3rd area, 4th area predominantly crystallize sizing, and heat roller temperature is controlled at 80~135 DEG C,
Tensile speed is 70~160m/min；
(7) rolled molding.
The present invention, the hot-rolling in the technique (6), including 1 roller, 2 rollers, 3 rollers, 4 rollers and 5 rollers, the temperature of each rod is respectively:
The temperature of 1 roller is 80~90 DEG C, and the temperature of 2 rollers is 100~110 DEG C, and the temperature of 3 rollers is 115~125 DEG C, and the temperature of 4 rollers is
130~135 DEG C, the temperature of 5 rollers is 130~135 DEG C, and 1 roller, 2 rollers take lower temperature, for being sufficiently tensile orientation, 3 rollers, 4 rollers, 5
Roller takes higher temperature, for crystallizing sizing.
The present invention has a characteristic that
A, technique (4) is rapidly cooled the tow sprayed from spinneret using cooling trough, exists to effectively avoid tow
Crystallization is generated between 120~130 DEG C, is avoided resulting crystallization that technique (6) are stretched with the influence of orientation, is improved technique
(6) consistency for stretching orientation, to improve the polyacrylic degree of orientation to realize the raising of intensity.Due to polyacrylic crystallization temperature
Degree is between 120~130 DEG C, and crystallinity and time are proportional, and traditional cross air blasting is air-cooled, the silk sprayed from spinneret
Beam, temperature is at 200 DEG C or so, and air-cooled by drying, temperature is gradually decreased to room temperature, when the temperature of tow is down to 120~130 DEG C
When, tow will generate part (or whole) crystallization, and the crystallization of tow will affect the stretching orientation of technique (6), to reduce stretching
The degree of orientation, and then its crystallization sizing is influenced, finally influence the intensity of finished silk；
B, it is pointed out in background technique, producing high-strength polypropylene filament yarn at present all is that (2000-3000m/min) life is stretched using high speed
It produces, and the present invention is produced using stretching (70~160m/min) at a slow speed, total draw ratio control is at 8~15 times, and horizontal drawing
The hot-rolling in machine is stretched, the temperature setting of 1 roller is 80~90 DEG C, and the temperature setting of 2 rollers is 100~110 DEG C, 1 roller and the setting of 2 rollers
Lower temperature, for being sufficiently tensile orientation；The temperature setting of 3 rollers is 115~125 DEG C, and the temperature setting of 4 rollers is 130~135
DEG C, the temperature setting of 5 rollers is 130~135 DEG C, and higher temperature is arranged in 3 rollers, 4 rollers and 5 rollers, for crystallizing sizing.
The present invention, due to being rapidly cooled using cooling trough to the tow sprayed from spinneret, to effectively avoid
Tow generates crystallization between 120~130 DEG C, and using production is stretched at a slow speed, polypropylene filament yarn produced is made to have superelevation
The performance of strong lower shrinkage, intensity >=9.0g/D, elongation at break≤20%, (elongation at break reflects the shrinking percentage of polypropylene filament yarn,
Elongation at break is smaller, and shrinking percentage is lower) to expand the purposes of polypropylene filament yarn.
Specific embodiment
Example 1:1100D/145f, total fiber number 1100D, 145 hole true qualities High-strength low-shrinkage polypropylene filament yarn of hole count prepare work
Skill includes:
(1) it selects to melt and refers to the polypropylene plastics for being 12, pour into drying in continuous drier, 80 DEG C of drying temperature, drying time 1 is small
When, moisture content≤0.01%；
(2) dried PP is put into melt in screw extruder and mediate, and cuts into the melt of viscous consistency, the pressure control of extruder
System in 8.0 ± 0.1Mpa, make it is uniform and stable for measuring, by measuring in the component that pump-metered is made a gift to someone in manifold, component pressure control
System carries out spinneret in 6.5 Mpa；
(3) at 220 DEG C~260 DEG C, condition of spinning manifold temperature is controlled at 230 DEG C~240 DEG C for extruder temperature control；
(4) tow that diameter spinneret sprays flows into cooling trough, is cooled by water, water temperature control at 16 DEG C ± 2 DEG C, spinneret from
Sink water surface 5mm or so；
(5) tow passes through oiling device after being cooled by water and uniformly oils, (water: oil=5:1, weight ratio)；
(6) tow enters the stretching of 4th area horizontal-type stretching Ji Fen after oiling, and main draw ratio is placed on 1st area and 2nd area, fills it sufficiently
Orientation, 3rd area, 4th area predominantly crystallize sizing, make to be not likely to produce lousiness in drawing process and broken end production is stablized, total stretching times
Number is 12 times or more；
(7) at 80 DEG C~135 DEG C, 1 roller, 2 roller takes lower temperature for heat roller temperature control, prevents tow from crystallizing excessive too fast influence
It stretches, 3 rollers, 4 rollers, 5 rollers take higher temperature, and tow crystallization is allowed to be formed；Wherein the temperature of 1 roller is 80~90 DEG C, the temperature of 2 rollers
It is 100~110 DEG C, the temperature of 3 rollers is 115~125 DEG C, and the temperature of 4 rollers is 130~135 DEG C, and the temperature of 5 rollers is 130~135
℃；
(8) 100m/min is arranged in tensile speed (wire vent speed)；
(9) rolled molding；
(10) main performance (1100D/145f): through detecting, product strength 9.24g/D；Elongation at break 16.5%.
Example 2:900D/120f, total fiber number 900D, hole count 120f true qualities High-strength low-shrinkage polypropylene filament yarn, preparation process
Include:
(1) it selects to melt and refers to the polypropylene chip for being 16, pour into drying in continuous drier, 75 DEG C of drying temperature, drying time 1 is small
When or so, moisture content≤0.01%；
(2) dried PP raw material is flowed into melt in screw extruder and be mediated, and cuts into the melt of viscous consistency, good fluidity,
The pressure of extruder is controlled in 8.0 ± 0.1MPa, makes component uniform and stable for measuring, to make a gift to someone in manifold by measuring pump-metered
In, component pressure control carries out spinneret in 6.5 MPa；
(3) at 240 DEG C~250 DEG C, condition of spinning manifold temperature is controlled at 220 DEG C~230 DEG C for extruder temperature control；
(4) tow through spinneret spinning, into being cooled by water in cooling trough, water temperature control at 16 DEG C ± 2 DEG C, spinneret from
Water surface distance 5mm or so；
(5) after being cooled by water, uniformly oil tow (water: oil=5:1, weight ratio) by oiling device；
(6) tow after oiling enters the stretching of 4th area horizontal-type stretching Ji Fen, and main draw ratio is placed on 1st area and 2nd area, sufficiently draws
Orientation is stretched, 3rd area, 4th area predominantly crystallize sizing, and making production, smoothly constantly first-born production is stablized, 12.5 times of total draw ratio；
(7) at 80 DEG C~135 DEG C, 1 roller, 2 roller takes lower temperature for heat roller temperature control, prevents tow from crystallizing excessive too fast influence
It stretches, 3 rollers, 4 rollers, 5 rollers take higher temperature, and tow crystallization is allowed to be formed；Wherein the temperature of 1 roller is 80~90 DEG C, the temperature of 2 rollers
It is 100~110 DEG C, the temperature of 3 rollers is 115~125 DEG C, and the temperature of 4 rollers is 130~135 DEG C, and the temperature of 5 rollers is 130~135
℃；
(8) tensile speed (wire vent speed) is 100m/min；
(9) rolled molding；
(10) the Main physical performance of 900D/120f polypropylene filament yarn: through detecting, product strength 9.46g/d；Elongation at break is
18.3%.
Claims (2)
1. the method that a kind of melt-spun-wet spinning technology prepares super High-strength low-shrinkage polypropylene filament yarn, including following technique:
(1) it selects to melt and refers to the polypropylene chip for being 4~20, pour into drying in continuous drier, it is 60~90 DEG C of drying temperature, dry
Time 1~3 hour, moisture content≤0.01wt%；
(2) dried PP raw material is flowed into melt in screw extruder and be mediated, and cuts into the melt of viscous consistency, good fluidity,
In pressure >=7.0MPa of extruder, it is sent into the component in manifold by metering pump-metered, component pressure 5~10MPa item
Spinneret is carried out under part；
(3) at 220~260 DEG C, condition of spinning manifold temperature is controlled at 220~240 DEG C for extruder temperature control；
(4) tow through spinneret spinning, into being cooled by water in cooling trough, water temperature control at 12~20 DEG C, spinneret from
3~10mm of water surface distance；
(5) tow after being cooled by water, uniformly oils by oiling device, wherein the oil is water-oil mixture, and water: oil is 3
~10:1, weight ratio；
(6) tow after oiling enters the stretching of 4th area horizontal-type stretching Ji Fen, and total draw ratio is 8~15 times, main to stretch again
Number is placed on 1st area and 2nd area, and to be sufficiently tensile orientation, 3rd area, 4th area predominantly crystallize sizing, and heat roller temperature is controlled at 80~135 DEG C,
Tensile speed is 70~160m/min；
(6) rolled molding.
2. the method that melt-spun according to claim 1-wet spinning technology prepares super High-strength low-shrinkage polypropylene filament yarn,
Be characterized in that: the hot-rolling in the technique (6), including 1 roller, 2 rollers, 3 rollers, 4 rollers and 5 rollers, the temperature of each rod is respectively: 1 roller
Temperature is 80~90 DEG C, and the temperature of 2 rollers is 100~110 DEG C, and the temperature of 3 rollers is 115~125 DEG C, the temperature of 4 rollers is 130~
135 DEG C, the temperature of 5 rollers is 130~135 DEG C, and 1 roller, 2 rollers take lower temperature, and for being sufficiently tensile orientation, 3 rollers, 4 rollers, 5 rollers are taken
Higher temperature, for crystallizing sizing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811543109.4A CN109295513A (en) | 2018-12-17 | 2018-12-17 | A kind of method that melt-spun-wet spinning technology prepares super High-strength low-shrinkage polypropylene filament yarn |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811543109.4A CN109295513A (en) | 2018-12-17 | 2018-12-17 | A kind of method that melt-spun-wet spinning technology prepares super High-strength low-shrinkage polypropylene filament yarn |
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| CN109295513A true CN109295513A (en) | 2019-02-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110747519A (en) * | 2019-10-22 | 2020-02-04 | 齐齐哈尔大学 | Preparation method of high-strength polypropylene fiber |
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Application publication date: 20190201 |