CN109722718A - A kind of manufacturing method of high strength industrial silk - Google Patents
A kind of manufacturing method of high strength industrial silk Download PDFInfo
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- CN109722718A CN109722718A CN201711023243.7A CN201711023243A CN109722718A CN 109722718 A CN109722718 A CN 109722718A CN 201711023243 A CN201711023243 A CN 201711023243A CN 109722718 A CN109722718 A CN 109722718A
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Abstract
The invention discloses a kind of manufacturing methods of high strength industrial silk.It is prepared by the industrial yarn high viscosity chips for being 1.070-1.110dl/g by intrinsic viscosity through processes such as screw rod melt extruded, side-blown air cooling, Multi-stage heat roller stretching, high temperature laxation shaping, coiling and moldings.Screw extruder temperature is 280~340 DEG C in manufacturing process；Spinning temperature is 280~340 DEG C, and side-blown air temperature is 20~28 DEG C, and cross air blasting wind speed is 20~50m/min, and spinning 5GR roller speed is 3000~3400m/min, and the total multiplying power of drawing-off is 5.5~6.0, and winding speed is 2975~3375m/min.Industrial yarn produced by the present invention is high-intensitive, and purposes is wide；Intensity Wei≤8.5cN/dtex of high strength industrial silk, dry-hot shrinkage 7.5 ± 1.5%, extension at break are 13.5 ± 2.0%.
Description
Technical field
The present invention relates to terylene preparation technical fields, specifically, are related to a kind of manufacturing method of high strength industrial silk.
Background technique
Terylene since the advent of the world, achieves huge development in industrial use, and polyester industrial yarn refers to high-strength, thick denier
Terylene industrial long filament.Polyester industrial yarn is with its breaking strength height, and initial modulus is high, and elongation percentage is low, and it is excellent that impact resistance is good etc.
Physical mechanical property, be industrially widely used, can be used as rubber and the modelings such as tire cord, cable envelope curve, conveyer belt
The framework material for expecting coated fabric, can also do rope, safety belt for vehicle, conveyer belt, tarpaulin, coated fabric, geotextile etc.；
Super high-strength PET industrial yam is widely used in the fields such as drag-line, cotton rope and hanging belt because it is with extra high intensity.
The breaking strength of the common high-strength polyester industrial yarns of domestic production is generally 8.0-8.2cN/dtex, is extremely difficult to
Some special requirements, using mainly general industrial products, therefore, our demands to high-strength polyester industrial yarns are very urgent
It cuts.With advances in technology, the breaking strength of polyester industrial yarn improves in breaking strength, but want Duan split Qiang Du≤
8.5cN/dtex needs constantly to optimize in technique.
Summary of the invention
Breaking strength in order to solve the problems, such as polyester industrial yarn existing in the prior art is not high, and the purpose of the present invention exists
In providing a kind of manufacturing method of high strength industrial silk.This method simple process, obtained polyester industrial yarn intensity are greater than
8.5cN/dtex。
Technical solution of the present invention is specifically described as follows.
The present invention provides a kind of manufacturing method of high strength industrial silk, the physical index line density of the high strength industrial silk
Deviation ratio is that ± 2.0%, Duan splits Qiang Du≤8.5cN/dtex, breaking strength CV Zhi≤3.0%, extension at break is 13.5 ±
2.0%, extension at break CV Zhi≤8.0%, dry-hot shrinkage is 7.5 ± 1.5%；It is prepared by the following method:
Using intrinsic viscosity for 1.070-1.110dl/g industrial yarn polyester slice with high viscosity as raw material, by successively screw rod
The step of melt extruded, side-blown air cooling, Multi-stage heat roller stretching, high temperature laxation shaping and coiling and molding, prepare high intensity
Industrial yarn；Wherein, screw extruder temperature when screw rod melt extruded is between 280~340 DEG C, and the temperature of spinning exists after melting
Between 300~340 DEG C, side-blown air temperature be 20~28 DEG C, cross air blasting wind speed be 20~50m/min, the total multiplying power of drawing-off be 5.5~
6.0, spinning 5GR roller speed is 3000~3400m/min, and winding speed is 2975~3375m/min.
In the present invention, the industrial yarn polyester slice with high viscosity that intrinsic viscosity is 1.070-1.110dl/g passes through first by characteristic
Viscosity has light industrial yarn dedicated fiber grade polyester chip for 0.670~0.690dl/g's, is tied in advance in pre-crystallizer by hot-air
Crystalline substance, then 205~220 DEG C temperature, handle 25~40 hours solid phase polycondensations under nitrogen and obtain.
In the present invention, in high temperature laxation shaping step, high temperature is 200~235 DEG C.
In the present invention, hot-rolling stretching ratio are as follows: pre-stretching 1.02~1.06,1 section of multiplying power 3.40~3.80 of multiplying power, it is total to stretch
Multiplying power 5.5~6.0；High-temperature shaping relaxation rate 3%.
In the present invention, high strength industrial filament product refers to: 933dtex/192f high-strength polyester industrial long filament, 1111dtex/
Three products such as 192f high-strength polyester industrial long filament, 1667dtex/192f high-strength polyester industrial long filament.
Compared with prior art, the beneficial effects of the present invention are:
1) there is light industrial yarn dedicated fiber grade polyester chip (raw material) to be upgraded, ensure that the stability of raw material.
2) by solid phase, spinning speed and stretching ratio is can be improved in the viscosity of further industrial yarn high viscosity chips,
Increase fibre strength.
3) by adjusting the inherent quality of the indexs such as extruder temperature, spinning temperature, Quenching air volume adjustment fiber.
Specific embodiment
Below according to specific embodiment, technical scheme is described further.Protection scope of the present invention is unlimited
In following embodiment, these examples are enumerated merely for exemplary purpose without limiting the invention in any way.
Performance test methods
It is tested according to national standard GB/T 16604-2008 string proof test method.
The preparation method of industrial yarn high viscosity chips: light industrial yarn dedicated fiber grade polyester chip rotation feeder is sent to
It in pre-crystallizer device, carries out, is dried and pre-crystallized between 80~140 DEG C；Then the hot-air between 150~170 DEG C
Under effect, after 2 hours or so, slice was heated and removes moisture content, was heated to 205~215 by nitrogen in preheating hopper
DEG C, residence time and temperature are respectively 2~4 hours and 205~215 DEG C.Slice after preheating under 205~220 DEG C of nitrogen,
It is moved down with piston type through 25~40 hours in tower, intrinsic viscosity increase about 0.6 becomes industrial yarn high viscosity chips.Through
Gu the high viscosity chips after poly- are stored in dry chip feed bin；High viscosity chips spinning is sent to by cyclelog control to cut
Piece feeds hopper.
Embodiment 1
Intrinsic viscosity is the industrial yarn high viscosity chips of 1.090dl/g, feeds hopper through spinning chips, defeated by pipeline
It send, into screw extruder, six area's temperature are respectively 320 DEG C, 325 DEG C, 303 DEG C, 295 DEG C, 295 DEG C, 295 DEG C, it is melted,
Spinning is carried out after into metering pump, spinning temperature is 320 DEG C, cross air blasting wind speed 40m/min；
Tow after cooling is wound after oiling, and by Multi-stage heat roller stretching, the total multiplying power of drawing-off is 5.85, each drawing-off
Heat roller temperature is respectively as follows: 85 DEG C of the first draw roll, 120 DEG C of the second draw roll, 110 DEG C of third draw roll, the 4th draw roll 230
DEG C, the 5th draw roll do not heat.
Each drawing-off hot-rolling rate is respectively as follows: the first draw roll 570m/min, the second draw roll 582m/min, third draw roll
1938m/min, the 4th draw roll 3333m/min, the 5th draw roll 3275m/min, winding speed 3250m/min are wound into
Finished product packing is carried out after type.
Process is smooth when fiber manufactures, stable physical property.
Finished product data by analysis are as follows: fiber number is 1118dtex (index: 1111dtex ± 2%), intensity 8.56cN/
Dtex, elongation at break 12.4%, 177 DEG C of xeothermic contractions 7.4%.
Embodiment 2
Intrinsic viscosity is the industrial yarn high viscosity chips of 1.090dl/g, feeds hopper through spinning chips, defeated by pipeline
It send, into screw extruder, six area's temperature are respectively 320 DEG C, 325 DEG C, 303 DEG C, 295 DEG C, 295 DEG C, 295 DEG C, it is melted,
Spinning is carried out after into metering pump, spinning temperature is 320 DEG C, cross air blasting wind speed 40m/min.
Tow after cooling is wound after oiling, and by Multi-stage heat roller stretching, the total multiplying power of drawing-off is 5.85, each drawing-off
Heat roller temperature is respectively as follows: 86 DEG C of the first draw roll, 121 DEG C of the second draw roll, 110 DEG C of third draw roll, the 4th draw roll 232
DEG C, the 5th draw roll do not heat.
Each drawing-off hot-rolling rate is respectively as follows: the first draw roll 571m/min, the second draw roll 582m/min, third draw roll
1940m/min, the 4th draw roll 3333m/min, the 5th draw roll 3275m/min, winding speed 3250m/min are wound into
Finished product packing is carried out after type.
Process is smooth when fiber manufactures, stable physical property.
Finished product data by analysis are as follows: fiber number is 1120dtex (index: 1111dtex ± 2%), intensity 8.54cN/
Dtex, elongation at break 12.6%, 177 DEG C of xeothermic contractions 7.3%.
Embodiment 3
Intrinsic viscosity is the industrial yarn high viscosity chips of 1.090dl/g, feeds hopper through spinning chips, defeated by pipeline
It send, into screw extruder, six area's temperature are respectively 325 DEG C, 3330 DEG C, 305 DEG C, 296 DEG C, 296 DEG C, 296 DEG C, are melted
Melt, into metering pump after carry out spinning, spinning temperature is 300 DEG C, cross air blasting wind speed 40m/min.
Tow after cooling is wound after oiling, and by Multi-stage heat roller stretching, the total multiplying power of drawing-off is 5.92, each drawing-off
Heat roller temperature is respectively as follows: 90 DEG C of the first draw roll, 125 DEG C of the second draw roll, 115 DEG C of third draw roll, the 4th draw roll 228
DEG C, the 5th draw roll do not heat.
Each drawing-off hot-rolling rate is respectively as follows: the first draw roll 576m/min, the second draw roll 588m/min, third draw roll
1958m/min, the 4th draw roll 3323m/min, the 5th draw roll 3275m/min, winding speed 3250m/min are wound into
Finished product packing is carried out after type.
Process is smooth when fiber manufactures, stable physical property.
Finished product data by analysis are as follows: fiber number is 1675dtex (index: 1667dtex ± 2%), intensity 8.60cN/
Dtex, elongation at break 12.5%, 177 DEG C of xeothermic contractions 7.2%.
Embodiment 4
Intrinsic viscosity is the industrial yarn high viscosity chips of 1.090dl/g, feeds hopper through spinning chips, defeated by pipeline
It send, into screw extruder, six area's temperature are respectively 323 DEG C, 328 DEG C, 303 DEG C, 296 DEG C, 296 DEG C, 296 DEG C, it is melted,
Spinning is carried out after into metering pump, spinning temperature is 320 DEG C, cross air blasting wind speed 40m/min.
Tow after cooling is wound after oiling, and by Multi-stage heat roller stretching, the total multiplying power of drawing-off is 5.81, each drawing-off
Heat roller temperature is respectively as follows: 85 DEG C of the first draw roll, 120 DEG C of the second draw roll, 110 DEG C of third draw roll, the 4th draw roll 230
DEG C, the 5th draw roll do not heat.
Each drawing-off hot-rolling rate is respectively as follows: the first draw roll 576m/min, the second draw roll 588m/min, third draw roll
1958m/min, the 4th draw roll 3333m/min, the 5th draw roll 3275m/min, winding speed 3250m/min are wound into
Finished product packing is carried out after type.
Process is smooth when fiber manufactures, stable physical property.
Finished product data by analysis are as follows: fiber number is 938dtex (index: 933dtex ± 2%), intensity 8.50cN/dtex,
Elongation at break is 13.1%, 177 DEG C of xeothermic contractions 7.5%.
Claims (4)
1. a kind of manufacturing method of high strength industrial silk, which is characterized in that the physical index line density of the high strength industrial silk
Deviation ratio is that ± 2.0%, Duan splits Qiang Du≤8.5cN/dtex, breaking strength CV Zhi≤3.0%, elongation at break is 13.5 ±
2.0%, extension at break CV Zhi≤8.0%, dry-hot shrinkage is 7.5 ± 1.5%；It is prepared by the following method:
Using intrinsic viscosity for 1.070-1.110dl/g industrial yarn polyester slice with high viscosity as raw material, by successively screw rod melt
The step of extruding, side-blown air cooling, Multi-stage heat roller stretching, high temperature laxation shaping and coiling and molding, prepare high strength industrial
Silk；Wherein, screw extruder temperature when screw rod melt extruded is between 280~340 DEG C, and the temperature of spinning is between after melting
300~340 DEG C, side-blown air temperature is 20~28 DEG C, and cross air blasting wind speed is 20~50m/min, and the total multiplying power of drawing-off is 5.5~6.0,
Spinning 5GR roller speed is 3000~3400m/min, and winding speed is 2975~3375m/min.
2. the manufacturing method according to claim 1, which is characterized in that intrinsic viscosity is the industry of 1.070-1.110dl/g
Silk polyester slice with high viscosity is by first having light industrial yarn dedicated fiber grade polyester for intrinsic viscosity for 0.670~0.690dl/g
Slice, it is pre-crystallized by hot-air in pre-crystallizer, then 205~220 DEG C temperature, handle 25~40 hours under nitrogen and consolidates
Phase polycondensation obtains.
3. the manufacturing method according to claim 1, which is characterized in that in high temperature laxation shaping step, high temperature be 200~
235℃。
4. the manufacturing method according to claim 1, which is characterized in that hot-rolling stretching ratio are as follows: pre-stretching multiplying power is 1.02
~1.06,1 section of multiplying power is 3.40~3.80, and total stretching ratio is 5.5~6.0；High-temperature shaping relaxation rate is 3%.
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| CN201711023243.7A CN109722718A (en) | 2017-10-27 | 2017-10-27 | A kind of manufacturing method of high strength industrial silk |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112680813A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Method for manufacturing polyester activated industrial yarn |
| CN113774498A (en) * | 2021-10-09 | 2021-12-10 | 晋江市永信达织造制衣有限公司 | Production method of high-strength wear-resistant polyester filament yarn |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112680813A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Method for manufacturing polyester activated industrial yarn |
| CN113774498A (en) * | 2021-10-09 | 2021-12-10 | 晋江市永信达织造制衣有限公司 | Production method of high-strength wear-resistant polyester filament yarn |
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Application publication date: 20190507 |