CN102797058B - Manufacturing method for super high-strength PET industrial yam - Google Patents
Manufacturing method for super high-strength PET industrial yam Download PDFInfo
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Abstract
The invention relates to a manufacturing method for super high-strength PET industrial yam, wherein the technological process for manufacture is as follows: hyperviscous smelting of polyester raw materials, metering, extruding, cooling, oil applying, stretching, heat setting and reeled forming; the cooling sequentially comprises four parts including slow cooling, precooling, calm zone cooling and blow cooling. The precooling refers to initiative outer ring stepped precooling, the initiative outer ring stepped precooling refers to that hot air is transferred and flow through the initiative outer ring stepped device for cooling filaments, the initiative outer ring stepped device is a hollow stepped ring-shaped belt which comprises two parts including an upper part and a lower part; and the hole density of the upper and the lower parts are the same, but the pore diameters are unequal. The temperature of embryo fibre on the spinning line can be adjusted through the technology of cooling conditions, the orientation and the crystallization of embryo fiber are reduced, the obtained linear density deviation ratio is smaller or equal to 1.5 percent, and the fracture strength is more than or equal to 8.8 cN/detex.
Description
Technical field
The present invention relates to a kind of production method of polyester industrial yarn, especially relate to a kind of manufacture method of ultra high-strength terylene industry silk, belong to dry polyester industrial yarn and manufacture field.
Background technology
Terylene, since coming out, has been obtained huge development in industrial use, and that polyester industrial yarn refers to is high-strength, the terylene industrial long filament at thick dawn.Polyester industrial yarn is high with its fracture strength, initial modulus is high, percentage elongation is low, the good physical and mechanical propertiess such as resistance to impact is good, industrial, be widely used, can be used as the framework material of the rubber such as tire cord, cable envelope curve, conveyer belt and plastic coating fabric, also can do rope, safety belt for vehicle, conveyer belt, tarpaulin, coated fabric, geotextile etc.
Ultra high-strength terylene industry silk, is widely used in the fields such as drag-line, cotton rope and hanging belt because it has extra high intensity.The fracture strength of the common high-strength polyester industrial yarns of domestic production is generally 7.8-8.0cN/dtex, and it is difficult to reach some special requirements, and application is mainly general industrial products, and therefore, we are very urgent to the demand of ultra high-strength terylene industry silk.Along with the progress of technology, the fracture strength of polyester industrial yarn improves in fracture strength, but its line density deviation ratio is larger, has restricted the application of ultra high-strength terylene industry silk.In the manufacture process of polyester industrial yarn, cooling forming process has determined the accumulation shape of as-spun fibre, will affect the quality of tensile property and the finished silk of as-spun fibre, particularly line density deviation ratio.
The selection of cooling condition and control are the significant effects factors in polyester industrial yarn forming process, and it all has considerable influence to the degree of orientation of fiber, diameter irregularity, degree of crystallinity, tensile property, mechanical property etc.In order to have obtained superperformance polyester industrial yarn, conventionally under spinnerets, add a kind of annealing device of heating, make tow cooling lentamente, install zone of silence device additional simultaneously, increase the buffer area of tow, more equably cooling tow.But along with adding of annealing device and zone of silence, the blowing position of side-blown moves down, and the solidification point of as-spun fibre and then moves down, tow shake aggravation, cause easily producing unsettled air-flow, aggravated the shake of tow, melt has been gone out after spinnerets unstable, spinning technique is under some influence, near the time of staying of as-spun fibre crystal region is longer simultaneously, thereby cause as-spun fibre degree of crystallinity excessive, in production, can cause lousiness and broken end, decrease in yield.
At present, the intensity of the ultra high-strength terylene industry silk of manufacturing has reached requirement, the method that adopts respectively spin-drawing one-step technology and add the agent of novel expansion connection as Chinese patent CN200710134080.X and CN 101824664A obtains higher intensity, makes the polyester industrial yarn that intensity is >=8.3CN/dtex.If from process for cooling come, obtain high-quality terylene as-spun fibre, avoided that as-spun fibre degree of crystallinity is excessive have been caused stretching irregular, what guarantee to stretch carries out smoothly, makes the ultra high-strength terylene industry silk of line density deviation.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of manufacture method of ultra high-strength terylene industry silk is provided.The selection of cooling condition and control are the significant effects factors in polyester industrial yarn forming process, in melt spinning process, the melt thread that melt is extruded from spinnerets, through the cooling solidified forming of cooling air, form the preliminary aggregated structure of fiber, the quality being shaped directly affects the spinnability of fiber and the quality of finished product, and the degree of orientation of fiber, diameter irregularity, degree of crystallinity, tensile property, mechanical property etc. are all had to considerable influence.The present invention, by selection and the control of cooling condition, provides a kind of manufacture method of ultra high-strength terylene industry silk.
The manufacture method of a kind of ultra high-strength terylene industry silk of the present invention, its technological process is high sticky melting polyester raw material, and---------cooling---oiling,---spray silk stretches---HEAT SETTING---winding shaping in metering; The terylene chips adopting is cutting into slices for high gluing of obtaining by solid-phase tack producing, and its inherent viscosity is 1.0 ~ 1.2dl/g.Because its molecular weight distribution is narrower, number-average molecular weight is higher, and after stretching, resulting fibre strength is higher.Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts; Reduce to greatest extent orientation and the crystallization of as-spun fibre, improve as far as possible after-drawing than being the basis of manufacturing ultra high-strength terylene industry silk.Spinning speed and cooling condition are the principal elements that affects as-spun fibre orientation, and crystallization is mainly subject to the impact of the type of cooling and technique; When melt is extruded from spinnerets, the temperature of melt is very high, a little less than thread is highly brittle, is unable to undergo the impact of any air-flow, and meanwhile, too fast cooling meeting causes fiber, and radially skin-core structure and the curling large molecule of generation of cross section increase.In order to control orientation and the crystallization of as-spun fibre, annealer (a kind of ring-type heater) is set in the production of industrial yarn, to guarantee that as-spun fibre is even, Slow cooling; Under annealer, be pre-cooler, pre-cooler be a kind of be initiatively outer shroud precooling, described precooling is the tow for the as-spun fibre in molten condition.Initiatively the precooling of outer shroud ladder refers to hot-air is carried to the outer shroud stepwise device and then strand is carried out cooling of flowing through initiatively, and initiatively outer loop device is hollow out endless belt, and precooling is played very important effect to falling low-fiber irregularity; Under pre-cooler, be without wind apparatus, without wind apparatus, it is a kind of ring type structure, its effect is to form the calm region that surrounding impales, zone of silence is cooling between pre-cold-peace quenching, zone of silence moves down the quench region of tow, the buffer area that increases tow, can make the cooling more even of tow.By the technique of cooling condition, adjust as-spun fibre in the temperature of spinning in journey, to reach, reduce the orientation of as-spun fibre and the object of crystallization, finally obtain high-quality fiber.
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts;
Described slow cooling refers to that tow ambient temperature is 260 ~ 300 ℃, and slow cooling district exit strand temperature is 280 ~ 285 ℃.
Described precooling is initiatively outer shroud ladder precooling; Described active outer shroud ladder precooling refers to carries by hot-air the outer shroud stepwise device and then carry out cooling to strand of flowing through initiatively; Described active outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is comprised of upper and lower two parts; The wind Area Ratio excessively of the upper part of described hollow out ladder endless belt is 40～60%, be highly 20～40mm, the described ratio of crossing area that wind Area Ratio refers to air stream part openwork part on described hollow out ladder endless belt and the area of the windward side of the upper part of described hollow out ladder endless belt; The wind Area Ratio excessively of the lower part of described hollow out ladder endless belt is 15～20%, is highly 20～40mm; The described ratio of crossing area that wind Area Ratio refers to air stream part openwork part under described hollow out ladder endless belt and the area of the windward side of the lower part of described hollow out ladder endless belt; The temperature of described hot-air is 60～80 ℃, humidity 60～80%, transporting velocity 0.2～0.8m/s.
Described precooling refers to that tow ambient temperature is 170 ~ 260 ℃, and exit, pre-cooling zone strand temperature is 250 ~ 260 ℃.
Described zone of silence is cooling refers to that tow ambient temperature is 130 ~ 160 ℃, and zone of silence exit strand temperature is 240 ~ 245 ℃.
The wind-warm syndrome of described quenching is 15～30 ℃;
The physical index of resulting ultra high-strength terylene industry silk: line density deviation ratio≤1.5%, fracture strength >=8.8cN/dtex, fracture strength CV value≤2.5%, extension at break is 10.0 ± 1.5%, extension at break CV value≤7.0%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 8.0 ± 1.0%.What often industrial yarn was emphasized is fracture strength and extension at break, and ignores the control to line density deviation ratio, and fineness-unevenness rate is irregular on intensity, it is very large to extend irregular impact, and the principal element that affects line density deviation ratio of cooling condition.
As preferred technical scheme:
Slow cooling described in the manufacture method of a kind of ultra high-strength terylene industry silk as above is highly 250～300mm.
The manufacture method of a kind of ultra high-strength terylene industry silk as above, the cooling height of described zone of silence is 200～300mm.
The manufacture method of a kind of ultra high-strength terylene industry silk as above, the upper part of described hollow out ladder endless belt is the through hole of uniform diameter 5～7mm on endless belt, the lower part of described hollow out ladder endless belt is the through hole of uniform diameter 3～4mm on endless belt, the cloth hole equal density of the lower part of the upper part of described hollow out ladder endless belt and described hollow out ladder endless belt, described cloth hole density refers to the cloth hole number in unit are.Pre-cooling zone adopts hollow out endless belt, and to select certain altitude and cross wind area be mainly in order to reduce air stream through the disturbance to tow, to play again the temperature action that reduces tow simultaneously.
By controlling the height of slow cooling, precooling, zone of silence, guarantee the time of staying of tow, reach and reduce the temperature of tow and the object that reduces the tow temperature difference radially, to obtain the polyester industrial yarn of low line density deviation ratio.
The manufacture method of a kind of ultra high-strength terylene industry silk as above, described zone of silence is cooling between pre-cold-peace quenching, and zone of silence refers to the calm region that surrounding impales.
The manufacture method of a kind of ultra high-strength terylene industry silk as above, described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 15～30 ℃, and humidity is 60～80%, and wind speed is 0.2～0.8m/s.
A kind of ultra high-strength terylene industry silk as above manufacture method, ultra high-strength terylene industry silk filament number 8dtex～15dtex that described method makes.
The basic principle of the manufacture method of a kind of ultra high-strength terylene industry silk of the present invention is:
After melt thread leaves spinnerets, be cooled immediately, the tensile stress that spinnerets is stretched rises rapidly, will improve significantly molecular preorientation degree, and fiber radially produces birefringence gradient.Therefore, obtain superperformance polyester industrial yarn, in the time of must making to solidify, the internal stress of strand is low especially, thereby molecular preorientation degree is reduced.By add a kind of annealing device of heating under spinnerets, melt thread is gone out after spinnerets not by quenching, but cooling lentamente, namely make cooldown rate reduce, extend melt district, solidification point is moved down, thereby reduced the tension force of spinneret draft, the pre-orientation degree of fiber is reduced, can play slow cooling effect and reduce core-skin phenomenon, improve single tow cooling uniformity, be beneficial to drafting multiple and improve, can obtain the fiber of high-tenacity.Annealing device guarantees that in this region, air has sufficiently high temperature, to control the decrease speed of strand temperature, improves the tensile property of fiber.
Tow enters cooled region through slow cooling district, and the tow at the blast points place of the top is still a kind of inhomogeneous state of cooling cold outside and hot inside.So increase zone of silence, can further reduce the transversal temperature difference of tow, reduced the strand causing because of quenching birefringence surperficial and strand inner core poor, therefore alleviate and the core-skin layer fibre structure forming, the quench region of tow is moved down, the buffer area that increases tow, can make the cooling more even of tow.
Along with adding of annealing device and zone of silence, the blowing position of side-blown moves down, and the solidification point of fiber and then moves down.But because the fiber number of industrial yarn is larger, its specific area is less, as-spun fibre is difficult for heat radiation, cooldown rate is slack-off, fiber is at the overstand of 180～200 ℃ of crystal regions, thereby cause as-spun fibre degree of crystallinity excessive, form the concentration of local of tensile stress, in production, can cause lousiness and broken end.Meanwhile, because the solidification point of fiber and then moves down, tow shake aggravation, causes this section easily to produce unsettled air-flow, has aggravated the shake of tow, melt is gone out after spinnerets extremely unstable, easily produces head silk, and spinning technique is under some influence.
Between annealing device and zone of silence, introduce pre-cooler, first be the position that has guaranteed the solidification point of as-spun fibre, the solidification point that has reduced fiber moves down the irregularity that produced tow shake brings, next is effectively control and reduced fiber near the time of staying 180～200 ℃, thereby avoided that as-spun fibre degree of crystallinity is excessive have been caused stretching irregular, what guarantee to stretch carries out smoothly.
The degree of crystallinity of as-spun fibre is low, and line density deviation ratio is low, by being more of value to the stretching in rear road, fiber is stretched, and makes macromolecular orientation in fiber, and regular arrangement improves fibre strength, reduces percentage elongation, obtains the polyester industrial yarn of superhigh intensity.
Beneficial effect:
1, adopt the terylene chips of solid phase polycondensation to carry out spinning, section narrow molecular weight distribution, is convenient to rear road and stretches, and makes high-quality super high strength industrial filament.
2, the introducing by pre-cooler reduces the orientation of as-spun fibre and the object of crystallization to reach, and finally obtains high-quality fiber.
3,, by the introducing of pre-cooler, the solidification point that has reduced fiber moves down the irregularity that produced tow shake brings, and line density deviation ratio is controlled in lower scope.
4, utilize the ultra high-strength terylene industry silk of the inventive method manufacture to have that fracture strength is high, line density deviation ratio is low, the rational advantage of dry-hot shrinkage, can meet well the needs of application.
The specific embodiment
Below in conjunction with the specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment 1
A kind of manufacture method of ultra high-strength terylene industry silk, its technological process is high sticky melting polyester raw material---metering---and spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein: the sticky melting polyester raw material of described height refers to that inherent viscosity is the high sticky section of PET of 1.0dl/g.
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts;
Described slow cooling refers to that tow ambient temperature is 260 ℃, and slow cooling district outlet strand temperature is 280 ℃; Slow cooling is highly 250mm.
Described precooling refers to that tow ambient temperature is 170 ℃, and pre-cooling zone outlet strand temperature is 250 ℃; Described precooling is highly 40mm.
Described zone of silence is cooling refers to that tow ambient temperature is 130 ℃, and zone of silence outlet strand temperature is 240 ℃; The cooling height of described zone of silence is 200mm.
The wind-warm syndrome of described quenching is 15 ℃; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 15 ℃, and humidity is 60%, and wind speed is 0.2m/s.
Described five rollers that are stretched as stretch, the temperature of the first roller is 20 ℃, speed is 500m/min, and the temperature of second roller is 70 ℃, and speed is 520m/min, the temperature of the 3rd roller is 110 ℃, 200 ~ 2500m/min, the 4th roll temperature is 200 ℃, speed is 2800m/min, the temperature of the 5th roller is 140 ℃, and speed is 2600m/min.Described heat setting temperature is the temperature of the 5th roller, and the winding speed of telling is 2500m/min.
The ultra high-strength terylene industry silk filament number 8dtex that described method makes.The physical index of resulting ultra high-strength terylene industry silk: line density deviation ratio=1.5%, fracture strength=8.9cN/dtex, fracture strength CV value=2.5%, extension at break is 11.0%, extension at break CV value=7.0%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 8.2%.
Embodiment 2
A kind of manufacture method of ultra high-strength terylene industry silk, its technological process is high sticky melting polyester raw material, and---------cooling------stretching---HEAT SETTING-winding shaping that oils, the sticky melting polyester raw material of described height refers to that inherent viscosity is the sticky section of height of 1.1dl/g to spray silk in metering.Wherein:
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts;
Described slow cooling refers to that tow ambient temperature is 300 ℃, and slow cooling district outlet strand temperature is 285 ℃; Slow cooling is highly 300mm.
Described precooling refers to that tow ambient temperature is 260 ℃, and pre-cooling zone outlet strand temperature is 260 ℃; Described precooling is highly 80mm.
Described zone of silence is cooling refers to that tow ambient temperature is 160 ℃, and zone of silence outlet strand temperature is 245 ℃; The cooling height of described zone of silence is 300mm.
The wind-warm syndrome of described quenching is 30 ℃; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 30 ℃, and humidity is 80%, and wind speed is 0.8m/s.
Described five rollers that are stretched as stretch, the temperature of the first roller is 25 ℃, speed is 550m/min, and the temperature of second roller is 80 ℃, and speed is 580m/min, the temperature of the 3rd roller is 120 ℃, 2300m/min, the 4th roll temperature is 210 ℃, speed is 3000m/min, the temperature of the 5th roller is 150 ℃, and speed is 2800m/min.Described heat setting temperature is the temperature of the 5th roller, and the winding speed of telling is 2800m/min.
The ultra high-strength terylene industry silk filament number 8dtex that described method makes.The physical index of resulting ultra high-strength terylene industry silk: line density deviation ratio=1.5%, fracture strength=8.9cN/dtex, fracture strength CV value=2.4%, extension at break is 10.7%, extension at break CV value=6.7%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 8.9%.
Embodiment 3
A kind of manufacture method of ultra high-strength terylene industry silk, its technological process is high sticky melting polyester raw material, and---------cooling---oiling,------HEAT SETTING---winding shaping that stretches, the sticky melting polyester raw material of described height refers to that inherent viscosity is the sticky section of height of 1.2dl/g to spray silk in metering.Wherein:
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts;
Described slow cooling refers to that tow ambient temperature is 280 ℃, and slow cooling district outlet strand temperature is 282 ℃; Slow cooling is highly 280mm.
Described precooling refers to that tow ambient temperature is 200 ℃, and pre-cooling zone outlet strand temperature is 255 ℃; Described precooling is highly 80mm.
Described zone of silence is cooling refers to that tow ambient temperature is 150 ℃, and zone of silence outlet strand temperature is 243 ℃; The cooling height of described zone of silence is 250mm.
The wind-warm syndrome of described quenching is 25 ℃; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 25 ℃, and humidity is 70%, and wind speed is 0.6m/s.
Described five rollers that are stretched as stretch, the temperature of the first roller is 30 ℃, speed is 550m/min, and the temperature of second roller is 80 ℃, and speed is 580m/min, the temperature of the 3rd roller is 120 ℃, 2400m/min, the 4th roll temperature is 210 ℃, speed is 3000m/min, the temperature of the 5th roller is 145 ℃, and speed is 2800m/min.Described heat setting temperature is the temperature of the 5th roller, and the winding speed of telling is 2700m/min.
The ultra high-strength terylene industry silk filament number 15dtex that described method makes.The physical index of resulting ultra high-strength terylene industry silk: line density deviation ratio=1.5%, fracture strength=9.1cN/dtex, extension at break is 11.5%, fracture strength CV value=2.0%, extension at break CV value=6.5%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 9.0%.
Embodiment 4
A kind of manufacture method of ultra high-strength terylene industry silk, its technological process is high sticky melting polyester raw material, and---------cooling---oiling,------HEAT SETTING---winding shaping that stretches, the sticky melting polyester raw material of described height refers to that inherent viscosity is the sticky section of height of 1.1dl/g to spray silk in metering.Wherein:
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts;
Described slow cooling refers to that tow ambient temperature is 300 ℃, and slow cooling district outlet strand temperature is 285 ℃; Slow cooling is highly 300mm.
Described precooling refers to that tow ambient temperature is 260 ℃, and pre-cooling zone outlet strand temperature is 260 ℃; Adopt initiatively outer shroud ladder precooling, hot-air is carried to the outer shroud stepwise device and then carry out cooling to strand of flowing through initiatively; Initiatively outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is comprised of upper and lower two parts; The wind Area Ratio excessively of the upper part of described hollow out ladder endless belt is 40%, is highly 20mm, the through hole of uniform 5mm, and the wind Area Ratio excessively of the lower part of described hollow out ladder endless belt is 15%, is highly 20mm; The through hole of uniform 3mm; The cloth hole density of upper part is the identical of bottom distribution hole density.The temperature of described hot-air is 60 ℃, humidity 60%, transporting velocity 0.2m/s
Described zone of silence is cooling refers to that tow ambient temperature is 160 ℃, and zone of silence outlet strand temperature is 245 ℃; The cooling height of described zone of silence is 300mm.Described zone of silence is cooling between pre-cold-peace quenching, and zone of silence refers to the calm region that surrounding impales.
The wind-warm syndrome of described quenching is 30 ℃; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 30 ℃, and humidity is 80%, and wind speed is 0.8m/s.
Described five rollers that are stretched as stretch, the temperature of the first roller is 25 ℃, speed is 550m/min, and the temperature of second roller is 80 ℃, and speed is 5300m/min, the temperature of the 3rd roller is 120 ℃, 2100m/min, the 4th roll temperature is 210 ℃, speed is 3000m/min, the temperature of the 5th roller is 140 ℃, and speed is 2700m/min.Described heat setting temperature is the temperature of the 5th roller, and the winding speed of telling is 2800m/min.
The ultra high-strength terylene industry silk filament number 10dtex that described method makes, the physical index of resulting ultra high-strength terylene industry silk: line density deviation ratio=1.3%, fracture strength=8.8cN/dtex, extension at break is 11.5%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 7.3%.
Embodiment 5
A kind of manufacture method of ultra high-strength terylene industry silk, its technological process is high sticky melting polyester raw material, and---------cooling---oiling,------HEAT SETTING---winding shaping that stretches, the sticky melting polyester raw material of described height refers to that inherent viscosity is the sticky section of height of 1.0dl/g to spray silk in metering.Wherein:
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts;
Described slow cooling refers to that tow ambient temperature is 280 ℃, and slow cooling district outlet strand temperature is 282 ℃; Slow cooling is highly 280mm.
Described precooling refers to that tow ambient temperature is 200 ℃, and pre-cooling zone outlet strand temperature is 252 ℃; Adopt initiatively outer shroud ladder precooling, hot-air is carried to the outer shroud stepwise device and then carry out cooling to strand of flowing through initiatively; Initiatively outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is comprised of upper and lower two parts; The wind Area Ratio excessively of the upper part of described hollow out ladder endless belt is 60%, is highly 40mm, the through hole of uniform 7mm, and the wind Area Ratio excessively of the lower part of described hollow out ladder endless belt is 20%, is highly 40mm; The through hole of uniform 4mm; The cloth hole density of upper part is that cloth hole, bottom density is identical.The temperature of described hot-air is 70 ℃, humidity 80%, transporting velocity 0.8m/s
Described zone of silence is cooling refers to that tow ambient temperature is 140 ℃, and zone of silence outlet strand temperature is 242 ℃; The cooling height of described zone of silence is 250mm.Described zone of silence is cooling between pre-cold-peace quenching, and zone of silence refers to the calm region that surrounding impales.
The wind-warm syndrome of described quenching is 20 ℃; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 20 ℃, and humidity is 70%, and wind speed is 0.6m/s.
Described five rollers that are stretched as stretch, the temperature of the first roller is 25 ℃, speed is 545m/min, and the temperature of second roller is 75 ℃, and speed is 580m/min, the temperature of the 3rd roller is 120 ℃, 2300m/min, the 4th roll temperature is 210 ℃, speed is 2800m/min, the temperature of the 5th roller is 160 ℃, and speed is 2800m/min.Described heat setting temperature is the temperature of the 5th roller, and the winding speed of telling is 2800m/min.
The ultra high-strength terylene industry silk filament number 15dtex that described method makes, the physical index of resulting ultra high-strength terylene industry silk: line density deviation ratio=1.2%, fracture strength=9.1cN/dtex, extension at break is 10.0%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 8.0%.
Embodiment 6
A kind of manufacture method of ultra high-strength terylene industry silk, its technological process is high sticky melting polyester raw material-metering, and------cooling---oiling,------HEAT SETTING---winding shaping that stretches, the sticky melting polyester raw material of described height refers to that inherent viscosity is the sticky section of height of 1.2dl/g to spray silk.Wherein:
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts;
Described slow cooling refers to that tow ambient temperature is 270 ℃, and slow cooling district outlet strand temperature is 281 ℃; Slow cooling is highly 270mm.
Described precooling refers to that tow ambient temperature is 190 ℃, and pre-cooling zone outlet strand temperature is 255 ℃; Adopt initiatively outer shroud ladder precooling, hot-air is carried to the outer shroud stepwise device and then carry out cooling to strand of flowing through initiatively; Initiatively outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is comprised of upper and lower two parts; The wind Area Ratio excessively of the upper part of described hollow out ladder endless belt is 50%, is highly 30mm, the through hole of uniform 6mm, and the wind Area Ratio excessively of the lower part of described hollow out ladder endless belt is 18%, is highly 30mm; The through hole of uniform 3.5mm; The cloth hole density of upper part is that cloth hole, bottom density is identical.The temperature of described hot-air is 75 ℃, humidity 65%, transporting velocity 0.6m/s
Described zone of silence is cooling refers to that tow ambient temperature is 150 ℃, and zone of silence outlet strand temperature is 243 ℃; The cooling height of described zone of silence is 260mm.Described zone of silence is cooling between pre-cold-peace quenching, and zone of silence refers to the calm region that surrounding impales.
The wind-warm syndrome of described quenching is 25 ℃; Described quenching is ring quenching, and the temperature that its technique is dried for ring is 25 ℃, and humidity is 75%, and wind speed is 0.5m/s.
Described five rollers that are stretched as stretch, the temperature of the first roller is 25 ℃, speed is 550m/min, and the temperature of second roller is 80 ℃, and speed is 580m/min, the temperature of the 3rd roller is 120 ℃, 2300m/min, the 4th roll temperature is 210 ℃, speed is 3000m/min, the temperature of the 5th roller is 150 ℃, and speed is 2500m/min.Described heat setting temperature is the temperature of the 5th roller, and the winding speed of telling is 2700m/min.
The ultra high-strength terylene industry silk filament number 12dtex that described method makes, the physical index of resulting ultra high-strength terylene industry silk: line density deviation ratio=1.0%, fracture strength=9.4cN/dtex, extension at break is 11.1%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 9.0%.
Claims (6)
1. a manufacture method for ultra high-strength terylene industry silk, is characterized in that: described manufacture method, and its technological process is high sticky melting polyester raw material, and---------cooling---oiling,---spray silk stretches---HEAT SETTING---winding shaping in metering; The sticky melting polyester raw material of height adopting refers to that inherent viscosity is the PET section of 1～1.2dl/g;
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts;
Described slow cooling refers to that tow ambient temperature is 260～300 ℃, and slow cooling district exit strand temperature is 280～285 ℃;
Described precooling is initiatively outer shroud ladder precooling; Described active outer shroud ladder precooling refers to carries by hot-air the outer shroud stepwise device and then carry out cooling to strand of flowing through initiatively; Described active outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is comprised of upper and lower two parts; The wind Area Ratio excessively of the upper part of described hollow out ladder endless belt is 40～60%, be highly 20～40mm, the described ratio of crossing area that wind Area Ratio refers to air stream part openwork part on described hollow out ladder endless belt and the area of the windward side of the upper part of described hollow out ladder endless belt; The wind Area Ratio excessively of the lower part of described hollow out ladder endless belt is 15～20%, is highly 20～40mm; The described ratio of crossing area that wind Area Ratio refers to air stream part openwork part under described hollow out ladder endless belt and the area of the windward side of the lower part of described hollow out ladder endless belt; The temperature of described hot-air is 60～80 ℃, humidity 60～80%, transporting velocity 0.2～0.8m/s;
Described precooling refers to that tow ambient temperature is 170～260 ℃, and exit, pre-cooling zone strand temperature is 250～260 ℃;
Described zone of silence is cooling refers to that tow ambient temperature is 130～160 ℃, and zone of silence exit strand temperature is 240～245 ℃;
The wind-warm syndrome of described quenching is 15～30 ℃;
The physical index of resulting ultra high-strength terylene industry silk: line density deviation ratio≤1.5%, fracture strength >=8.8cN/dtex, fracture strength CV value≤2.5%, extension at break is 10.0 ± 1.5%, extension at break CV value≤7.0%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 8.0 ± 1.0%;
Ultra high-strength terylene industry silk filament number 8dtex～15dtex that described method makes.
2. the manufacture method of a kind of ultra high-strength terylene industry silk according to claim 1, is characterized in that, described slow cooling is highly 250～300mm.
3. the manufacture method of a kind of ultra high-strength terylene industry silk according to claim 1, is characterized in that, the cooling height of described zone of silence is 200～300mm.
4. the manufacture method of a kind of ultra high-strength terylene industry silk according to claim 1, it is characterized in that, the upper part of described hollow out ladder endless belt is the through hole of uniform diameter 5～7mm on endless belt, the lower part of described hollow out ladder endless belt is the through hole of uniform diameter 3～4mm on endless belt, the cloth hole equal density of the lower part of the upper part of described hollow out ladder endless belt and described hollow out ladder endless belt, described cloth hole density refers to the cloth hole number in unit are.
5. the manufacture method of a kind of ultra high-strength terylene industry silk according to claim 1, is characterized in that, described zone of silence is cooling between pre-cold-peace quenching, and zone of silence refers to the calm region that surrounding impales.
6. the manufacture method of a kind of ultra high-strength terylene industry silk according to claim 1, is characterized in that, described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 15～30 ℃, and humidity is 60～80%, and wind speed is 0.2～0.8m/s.
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| CN106567146B (en) * | 2016-11-15 | 2018-10-23 | 东华大学 | A kind of high strength fibre positive pressure melt spinning manufacturing process |
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| US5173310A (en) * | 1988-03-24 | 1992-12-22 | Mitsui Petrochemical Industries, Ltd. | Device for cooling molten filaments in spinning apparatus |
| US5186879A (en) * | 1990-05-11 | 1993-02-16 | Hoechst Celanese Corporation | Spinning process for producing high strength, high modulus, low shrinkage yarns |
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