CN102797056B - Manufacturing method for superlow shrinkage type PET industrial yarn - Google Patents
Manufacturing method for superlow shrinkage type PET industrial yarn Download PDFInfo
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Abstract
The invention relates to a manufacturing method for superlow shrinkage type PET industrial yarn, which is characterized in that the superlow shrinkage type PET industrial yarn is manufactured through selecting and controlling cooling conditions, and the technological process is as follows: hyperviscous melting to polyester raw materials, metering, spanning, cooling, oil supplying, stretching, hot shaping, and reeled forming. For lowing the irregularity and shrinkage percentage of fiber, a slow cooling device is arranged in the production of industrial yarn, a precooling device adopted is a hollow stepped ring-shaped belt comprising an upper part and a lower part, through holes with the diameters of 5 to 7 mm are uniformly distributed in the upper part of the ring-shaped belt, through holes with the diameters of 3 to 4 mm are uniformly distributed in the lower part, and the hole arrangement densities are the same. The natural target of the PET industrial yarn is as follows: the fracture strength is equal or greater than 7.0 cN/dtex, the breaking elongation is 20.0 plus or minus 1.5 percent, and the dry heat shrinkage percentage under the test conditions of 170 DEGC, 0.05cN/dtex reaches 1.9 plus or minus 0.25 percent.
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 ultralow shrinkage type polyester industrial yarn, belong to 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, be widely used industrial, the framework material that can be used as 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.
Polyester industrial yarn is widely used in different fields, and for ultralow shrinkage type polyester industrial yarn, to be that PET molecule is regular arrange its architectural feature, and crystal density is larger, and degree of crystallinity improves and contraction in size reduces.It has compared with low dry-hot shrinkage and the good feature such as DIMENSIONAL STABILITY and be widely used in filter cloth, coated fabric, the aspects such as flexible pipe and conveyer belt parallel.
The selection of cooling condition and control are the significant effects factors in polyester industrial yarn forming process, and its degree of orientation to fiber, diameter irregularity, degree of crystallinity, tensile property, mechanical property, shrinkage factor etc. all have considerable influence.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, cooling tow more equably.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 is gone out after spinnerets unstable, spinning technique is under some influence, industrial yarn produces and shrinks, and near the time of staying of while as-spun fibre crystal region is longer, thereby causes as-spun fibre degree of crystallinity excessive, in production, can cause lousiness and broken end, decrease in yield.And the good cooling fiber that is conducive to obtain the reasonable degree of orientation and degree of crystallinity makes fiber 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 applying.
The dry-hot shrinkage of traditional ultralow shrinkage type polyester industrial yarn is approximately 2%(170 DEG C, 1min, 0.05g/D), and easily occur that contraction is inhomogeneous, irregular problem.In existing technology, the manufacturing technique of the ultralow shrinkage type polyester industrial yarn described in Chinese patent CN 1904153A, although the ultralow shrinkage of this fiber is good, its raw material intrinsic viscosity requires high, heat setting process is comparatively complicated.Ultralow shrinkage type polyester industrial fiber described in patent CN 101307513B is by adding inorganic particle in raw material, does not improve the cooling procedure in manufacturing technique.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of manufacture method of ultralow shrinkage type polyester industrial yarn is provided.The selection of cooling condition and control are most important influence factors in polyester industrial yarn forming process, in melt spinning process, the melt thread of extruding 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 to fiber, diameter irregularity, shrinkage factor, degree of crystallinity, tensile property, mechanical property etc. all have considerable influence.The present invention, by selection and the control of cooling condition, provides a kind of manufacture method of ultralow shrinkage type polyester industrial yarn.
The manufacture method of a kind of ultralow shrinkage type polyester industrial yarn 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 the sticky section of height 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 the fibre strength obtaining after stretching is higher, and shrinkage factor is less.Described cooling cooling and quenching four parts of slow cooling, precooling, zone of silence that comprise successively; Reduce to greatest extent orientation, crystallization and the contraction of as-spun fibre, improve as far as possible after-drawing than being the basis of manufacturing ultralow shrinkage type polyester industrial yarn.Spinning speed and cooling condition are the principal elements that affects as-spun fibre orientation, and crystallization and contraction are 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, be unable to undergo the impact of any air-flow, meanwhile, too fast cooling meeting cause fiber radially cross section skin-core structure and produce curling large molecule increase, and then cause industrial yarn produce shrink.In order to control the contraction of orientation, crystallization and industrial yarn of as-spun fibre, annealer (a kind of ring-type heater) is set in the production of industrial yarn, with ensure as-spun fibre evenly, Slow cooling; It under annealer, is pre-cooler, pre-cooler is a kind of passive outer shroud precooling, described precooling is the tow for the as-spun fibre in molten condition, passive outer shroud precooling refers to flow through passive outer loop device and then carry out cooling to strand of air natural, passive outer loop device is hollow out endless belt, and precooling is played very important effect to falling low-fiber irregularity and shrinkage factor; Under pre-cooler, be without wind apparatus, be a kind of ring type structure without wind apparatus, 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.Adjust as-spun fibre in the temperature of spinning in journey by the technique of cooling condition, reduce the object of orientation, crystallization and the industrial yarn contraction of as-spun fibre to reach, finally obtain the fiber of high-quality.
Described cooling cooling and quenching four parts of slow cooling, precooling, zone of silence that comprise successively;
Described slow cooling refers to that tow ambient temperature is 260 ~ 300 DEG C, and slow cooling district exit strand temperature is 280 ~ 285 DEG C.
Described precooling is the precooling of passive outer shroud ladder; Described passive outer shroud ladder precooling refers to flow through passive outer shroud stepwise device and then carry out cooling to strand of air natural; Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is made up 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;
Described precooling refers to that tow ambient temperature is 160 ~ 260 DEG C, and exit, pre-cooling zone strand temperature is 250 ~ 260 DEG C.
Described zone of silence is cooling refers to that tow ambient temperature is 100 ~ 160 DEG C, and zone of silence exit strand temperature is 230 ~ 240 DEG C.
The wind-warm syndrome of described quenching is 15～30 DEG C;
The physical index of the ultralow shrinkage type polyester industrial yarn obtaining: line density deviation ratio≤1.5%, fracture strength >=7.0cN/dtex, fracture strength CV value≤2.5%, extension at break is 20.0 ± 1.5%, extension at break CV value≤7.0%, the dry-hot shrinkage under 177 DEG C, the test condition of 0.05cN/dtex is 1.9 ± 0.25%.
What often industrial yarn was emphasized is fracture strength and extension at break, and ignore the control of orientation, crystallization and shrinkage factor to as-spun fibre, larger orientation, crystallization and shrinkage factor be irregular on intensity, it is very large to extend irregular impact, and the impact of cooling condition is to cause as-spun fibre orientation, crystallization and the larger principal element of industrial yarn shrinkage factor.
As preferred technical scheme:
Slow cooling described in the manufacture method of a kind of ultralow shrinkage type polyester industrial yarn as above is highly 250～300mm.
The manufacture method of a kind of ultralow shrinkage type polyester industrial yarn as above, the cooling height of described zone of silence is 200～300mm.
Ensure the time of staying of tow by the height of controlling slow cooling, precooling, zone of silence, reach the temperature that reduces tow and the object that reduces the tow temperature difference radially, to obtain ultralow shrinkage type polyester industrial yarn.
The preparation method of a kind of ultralow shrinkage type polyester industrial yarn 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.
The manufacture method of a kind of ultralow shrinkage type polyester industrial yarn 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 ultralow shrinkage type polyester industrial yarn as above, described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 15～30 DEG C, and humidity is 60～80%, and wind speed is 0.2～0.8m/s.
The manufacture method of a kind of ultralow shrinkage type polyester industrial yarn as above, ultralow shrinkage type polyester industrial yarn filament number 5～10dtex that described method makes.
The general principle of the manufacture method of a kind of ultralow shrinkage type polyester industrial yarn 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 the polyester industrial yarn of superperformance, must make to solidify time, the internal stress of strand is low especially, thereby molecular preorientation degree is reduced, and then the shrinkage factor of polyester industrial yarn 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 low contraction and 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, reduce the strand causing because of quenching birefringence surperficial and strand inner core poor, the core-skin layer fibre structure alleviating therefore and form, 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 DEG C 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 ensured the solidification point of as-spun fibre, the solidification point that has reduced fiber moves down produced tow and shakes the irregularity bringing, next is effectively control and reduced near the time of staying of fiber 180～200 DEG C, thereby avoided as-spun fibre degree of crystallinity excessive caused stretch irregular, shrink excessive, ensure stretch carry out smoothly.
Beneficial effect:
1,, by the introducing of pre-cooler, the solidification point that has reduced fiber moves down produced tow and shakes the irregularity bringing, and line density deviation ratio is controlled in lower scope.
2, reduce the orientation of as-spun fibre and the object of crystallization by the introducing of pre-cooler to reach, finally obtain the fiber of high-quality.
3, the introducing of pre-cooler produces beneficial effect to the stretching of fiber, has reduced the shrinkage factor of fiber and has improved the modulus of prepared fiber.
4, utilize the ultralow shrinkage type polyester industrial yarn 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.
Detailed description of the invention
Below in conjunction with detailed description of the invention, 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 manufacture method for ultralow shrinkage type polyester industrial yarn, its technological process is high sticky melting polyester raw material---metering---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 1.1dl/g.
Described cooling cooling and quenching four parts of slow cooling, precooling, zone of silence that comprise successively;
Described slow cooling refers to that tow ambient temperature is 260 DEG C, and slow cooling district exit strand temperature is 280 DEG C; Slow cooling is highly 250mm.
Described precooling refers to that tow ambient temperature is 160 DEG C, and exit, pre-cooling zone strand temperature is 250 DEG C; Described precooling is highly 40mm.
Described zone of silence is cooling refers to that tow ambient temperature is 100 DEG C, and zone of silence exit strand temperature is 230 DEG C; The cooling height of described zone of silence is 200mm.
The wind-warm syndrome of described quenching is 15 DEG C; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 15 DEG C, and humidity is 60%, and wind speed is 0.2m/s.
Described four rollers that are stretched as stretch, the temperature of the first roller is 20 DEG C, speed is 1850m/min, the temperature of second roller is 68 DEG C, and speed is 2250m/min, and the temperature of the 3rd roller is 192 DEG C, speed is 3435m/min, the 4th roll temperature is 145 DEG C, and speed is 3035m/min, and the speed of the 5th roller is 2800m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 2800m/min.
The ultralow shrinkage type polyester industrial yarn filament number 5dtex that described method makes.The physical index of the ultralow shrinkage type polyester industrial yarn obtaining: line density deviation ratio 0.05%, fracture strength 7.0cN/dtex, fracture strength CV value 0.01%, extension at break is 18.5%, extension at break CV value 1.0%, the dry-hot shrinkage under 177 DEG C, the test condition of 0.05cN/dtex is 1.65%.
Embodiment 2
A manufacture method for ultralow shrinkage type polyester industrial yarn, its technological process is high sticky melting polyester raw material---metering---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 sticky section of height of 1.09dl/g.
Described cooling cooling and quenching four parts of slow cooling, precooling, zone of silence that comprise successively;
Described slow cooling refers to that tow ambient temperature is 300 DEG C, and slow cooling district exit strand temperature is 285 DEG C; Slow cooling is highly 300mm.
Described precooling refers to that tow ambient temperature is 260 DEG C, and exit, pre-cooling zone strand temperature is 260 DEG C; Described precooling is highly 80mm.
Described zone of silence is cooling refers to that tow ambient temperature is 160 DEG C, and zone of silence exit strand temperature is 240 DEG C; The cooling height of described zone of silence is 300mm.
The wind-warm syndrome of described quenching is 30 DEG C; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 30 DEG C, and humidity is 80%, and wind speed is 0.8m/s.
Described four rollers that are stretched as stretch, the temperature of the first roller is 18 DEG C, speed is 1822m/min, the temperature of second roller is 67 DEG C, and speed is 2277m/min, and the temperature of the 3rd roller is 213 DEG C, speed is 3926m/min, the 4th roll temperature is 175 DEG C, and speed is 3400m/min, and the speed of the 5th roller is 2937m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 2937m/min.
The ultralow shrinkage type polyester industrial yarn filament number 10dtex that described method makes.The physical index of the ultralow shrinkage type polyester industrial yarn obtaining: line density deviation ratio 1.5%, fracture strength 7.8cN/dtex, fracture strength CV value 2.5%, extension at break is 21.5%, extension at break CV value 7.0%, the dry-hot shrinkage under 177 DEG C, the test condition of 0.05cN/dtex is 2.15%.
Embodiment 3
A manufacture method for ultralow shrinkage type polyester industrial yarn, its technological process is high sticky melting polyester raw material---metering---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 sticky section of height of 1.02dl/g.
Described cooling cooling and quenching four parts of slow cooling, precooling, zone of silence that comprise successively;
Described slow cooling refers to that tow ambient temperature is 280 DEG C, and slow cooling district exit strand temperature is 283 DEG C; Slow cooling is highly 285mm.
Described precooling refers to that tow ambient temperature is 210 DEG C, and exit, pre-cooling zone strand temperature is 255 DEG C; Described precooling is highly 60mm.
Described zone of silence is cooling refers to that tow ambient temperature is 130 DEG C, and zone of silence exit strand temperature is 235 DEG C; The cooling height of described zone of silence is 250mm.
The wind-warm syndrome of described quenching is 23 DEG C; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 23 DEG C, and humidity is 70%, and wind speed is 0.5m/s.
Described four rollers that are stretched as stretch, the temperature of the first roller is 22 DEG C, speed is 1909m/min, the temperature of second roller is 68 DEG C, and speed is 2255m/min, and the temperature of the 3rd roller is 199 DEG C, speed is 3776m/min, the 4th roll temperature is 152 DEG C, and speed is 3226m/min, and the speed of the 5th roller is 2870m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 2870m/min.
The ultralow shrinkage type polyester industrial yarn filament number 8dtex that described method makes.The physical index of the ultralow shrinkage type polyester industrial yarn obtaining: line density deviation ratio 0.5%, fracture strength 7.3cN/dtex, fracture strength CV value 2%, extension at break is 21%, extension at break CV value 3.0%, the dry-hot shrinkage under 177 DEG C, the test condition of 0.05cN/dtex is 2.0%.
Embodiment 4
A manufacture method for ultralow shrinkage type polyester industrial yarn, its technological process is high sticky melting polyester raw material---metering---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 sticky section of height of 1.14dl/g.
Described cooling cooling and quenching four parts of slow cooling, precooling, zone of silence that comprise successively;
Described slow cooling refers to that tow ambient temperature is 260 DEG C, and slow cooling district exit strand temperature is 280 DEG C; Slow cooling is highly 250mm.
Described precooling refers to that tow ambient temperature is 160 DEG C, and exit, pre-cooling zone strand temperature is 250 DEG C.Described precooling is passive outer shroud precooling; Described passive outer shroud precooling refers to flow through passive outer loop device and then carry out cooling to strand of air natural.Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is made up of upper and lower two parts; The wind Area Ratio excessively of the upper part of described hollow out ladder endless belt is 40%, be highly 20mm, 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%, is highly 20mm; 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 upper part of described hollow out ladder endless belt is the through hole of uniform diameter 5mm on endless belt, the lower part of described hollow out ladder endless belt is the through hole of uniform diameter 3mm 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.
Described zone of silence is cooling refers to that tow ambient temperature is 100 DEG C, and zone of silence exit strand temperature is 230 DEG C; The cooling height of described zone of silence is 200mm.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 15 DEG C; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 15 DEG C, and humidity is 60%, and wind speed is 0.2m/s.
Described four rollers that are stretched as stretch, the temperature of the first roller is 19 DEG C, speed is 3250m/min, the temperature of second roller is 78 DEG C, and speed is 4850m/min, and the temperature of the 3rd roller is 203 DEG C, speed is 6090m/min, the 4th roll temperature is 147 DEG C, and speed is 5804m/min, and the speed of the 5th roller is 5765m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 5765m/min.
The ultralow shrinkage type polyester industrial yarn filament number 5dtex that described method makes, the physical index of the ultralow shrinkage type polyester industrial yarn obtaining: line density deviation ratio 0.02%, fracture strength 7.0cN/dtex, fracture strength CV value 0.03%, extension at break is 18%, extension at break CV value 2.0%, the dry-hot shrinkage under 177 DEG C, the test condition of 0.05cN/dtex is 1.7%.
Embodiment 5
A manufacture method for ultralow shrinkage type polyester industrial yarn, its technological process is high sticky melting polyester raw material---metering---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 sticky section of height of 1.08dl/g.
Described cooling cooling and quenching four parts of slow cooling, precooling, zone of silence that comprise successively;
Described slow cooling refers to that tow ambient temperature is 300 DEG C, and slow cooling district exit strand temperature is 285 DEG C; Slow cooling is highly 300mm.
Described precooling refers to that tow ambient temperature is 260 DEG C, and exit, pre-cooling zone strand temperature is 260 DEG C.Described precooling is passive outer shroud precooling; Described passive outer shroud precooling refers to flow through passive outer loop device and then carry out cooling to strand of air natural.Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is made up of upper and lower two parts; The wind Area Ratio excessively of the upper part of described hollow out ladder endless belt is 60%, be highly 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 20%, is highly 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 upper part of described hollow out ladder endless belt is the through hole of uniform diameter 7mm on endless belt, the lower part of described hollow out ladder endless belt is the through hole of uniform diameter 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.
Described zone of silence is cooling refers to that tow ambient temperature is 160 DEG C, and zone of silence exit strand temperature is 240 DEG C; 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 DEG C; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 30 DEG C, and humidity is 80%, and wind speed is 0.8m/s.
Described four rollers that are stretched as stretch, the temperature of the first roller is 21 DEG C, speed is 3350m/min, the temperature of second roller is 77 DEG C, and speed is 4824m/min, and the temperature of the 3rd roller is 213 DEG C, speed is 6240m/min, the 4th roll temperature is 147 DEG C, and speed is 5989m/min, and the speed of the 5th roller is 6000m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 6000m/min.
The ultralow shrinkage type polyester industrial yarn filament number 10dtex that described method makes, the physical index of the ultralow shrinkage type polyester industrial yarn obtaining: line density deviation ratio 1.5%, fracture strength 7.9cN/dtex, fracture strength CV value 2.5%, extension at break is 21.5%, extension at break CV value 7.0%, the dry-hot shrinkage under 177 DEG C, the test condition of 0.05cN/dtex is 2.15%.
Embodiment 6
A manufacture method for ultralow shrinkage type polyester industrial yarn, its technological process is high sticky melting polyester raw material---metering---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 sticky section of height of 1.07dl/g.
Described cooling cooling and quenching four parts of slow cooling, precooling, zone of silence that comprise successively;
Described slow cooling refers to that tow ambient temperature is 280 DEG C, and slow cooling district exit strand temperature is 284 DEG C; Slow cooling is highly 275mm.
Described precooling refers to that tow ambient temperature is 210 DEG C, and exit, pre-cooling zone strand temperature is 255 DEG C.Described precooling is passive outer shroud precooling; Described passive outer shroud precooling refers to flow through passive outer loop device and then carry out cooling to strand of air natural.Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is made up of upper and lower two parts; The wind Area Ratio excessively of the upper part of described hollow out ladder endless belt is 50%, be highly 30mm, 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 17.5%, is highly 30mm; 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 upper part of described hollow out ladder endless belt is the through hole of uniform diameter 6mm on endless belt, the lower part of described hollow out ladder endless belt is the through hole of uniform diameter 3.5mm 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.
Described zone of silence is cooling refers to that tow ambient temperature is 130 DEG C, and zone of silence exit strand temperature is 235 DEG C; 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 17.5 DEG C; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 17.5 DEG C, and humidity is 70%, and wind speed is 0.5m/s.
Described four rollers that are stretched as stretch, the temperature of the first roller is 22 DEG C, speed is 3340m/min, the temperature of second roller is 82 DEG C, and speed is 4840m/min, and the temperature of the 3rd roller is 212 DEG C, speed is 5909m/min, the 4th roll temperature is 152 DEG C, and speed is 5802m/min, and the speed of the 5th roller is 5709m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 5709m/min.
The ultralow shrinkage type polyester industrial yarn filament number 7.5dtex that described method makes, the physical index of the ultralow shrinkage type polyester industrial yarn obtaining: line density deviation ratio 0.7%, fracture strength 7.36cN/dtex, fracture strength CV value 1.2%, extension at break is 20.5%, extension at break CV value 5.6%, the dry-hot shrinkage under 177 DEG C, the test condition of 0.05cN/dtex is 2.02%.
Embodiment 7
A manufacture method for ultralow shrinkage type polyester industrial yarn, its technological process is high sticky melting polyester raw material---metering---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 sticky section of height of 1.12dl/g.
Described cooling cooling and quenching four parts of slow cooling, precooling, zone of silence that comprise successively;
Described slow cooling refers to that tow ambient temperature is 265 DEG C, and slow cooling district exit strand temperature is 282 DEG C; Slow cooling is highly 270mm.
Described precooling refers to that tow ambient temperature is 190 DEG C, and exit, pre-cooling zone strand temperature is 252 DEG C.Described precooling is passive outer shroud precooling; Described passive outer shroud precooling refers to flow through passive outer loop device and then carry out cooling to strand of air natural.Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is made up of upper and lower two parts; The wind Area Ratio excessively of the upper part of described hollow out ladder endless belt is 48%, be highly 27mm, 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 17%, is highly 29mm; 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 upper part of described hollow out ladder endless belt is the through hole of uniform diameter 5.8mm on endless belt, the lower part of described hollow out ladder endless belt is the through hole of uniform diameter 3.2mm 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.
Described zone of silence is cooling refers to that tow ambient temperature is 130 DEG C, and zone of silence exit strand temperature is 234 DEG C; The cooling height of described zone of silence is 234mm.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 22 DEG C; Described quenching is ring quenching, and its technique is that the temperature of ring blowing is 22 DEG C, and humidity is 67%, and wind speed is 0.6m/s.
Described four rollers that are stretched as stretch, the temperature of the first roller is 23 DEG C, speed is 3205m/min, the temperature of second roller is 78 DEG C, and speed is 5200m/min, and the temperature of the 3rd roller is 213 DEG C, speed is 6290m/min, the 4th roll temperature is 149 DEG C, and speed is 6051m/min, and the speed of the 5th roller is 5991m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 5991m/min.
The ultralow shrinkage type polyester industrial yarn filament number 7.6dtex that described method makes, the physical index of the ultralow shrinkage type polyester industrial yarn obtaining: line density deviation ratio 0.9%, fracture strength 7.7cN/dtex, fracture strength CV value 1.7%, extension at break is 18.9%, extension at break CV value 4.0%, the dry-hot shrinkage under 177 DEG C, the test condition of 0.05cN/dtex is 1.86%.
Claims (6)
1. a manufacture method for ultralow shrinkage type polyester industrial yarn, 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 described height refers to that inherent viscosity is the PET section of 1.0～1.2dl/g;
Described cooling cooling and quenching four parts of slow cooling, precooling, zone of silence that comprise successively;
Described slow cooling refers to that tow ambient temperature is 260～300 DEG C, and slow cooling district exit strand temperature is 280～285 DEG C;
Described precooling is the precooling of passive outer shroud ladder; Described passive outer shroud ladder precooling refers to flow through passive outer shroud stepwise device and then carry out cooling to strand of air natural; Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is made up 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;
Described precooling refers to that tow ambient temperature is 160～260 DEG C, and exit, pre-cooling zone strand temperature is 250～260 DEG C;
Described zone of silence is cooling refers to that tow ambient temperature is 100～160 DEG C, and zone of silence exit strand temperature is 230～240 DEG C;
The wind-warm syndrome of described quenching is 15～30 DEG C;
The physical index of the ultralow shrinkage type polyester industrial yarn obtaining: line density deviation ratio≤1.5%, fracture strength >=7.0cN/dtex, fracture strength CV value≤2.5%, extension at break is 20.0 ± 1.5%, extension at break CV value≤7.0%, the dry-hot shrinkage under 177 DEG C, the test condition of 0.05cN/dtex is 1.9 ± 0.25%;
Ultralow shrinkage type polyester industrial yarn filament number 5～10dtex that described method makes.
2. the manufacture method of a kind of ultralow shrinkage type polyester industrial yarn according to claim 1, is characterized in that, described slow cooling is highly 250～300mm.
3. the manufacture method of a kind of ultralow shrinkage type polyester industrial yarn 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 ultralow shrinkage type polyester industrial yarn 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 ultralow shrinkage type polyester industrial yarn 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 ultralow shrinkage type polyester industrial yarn 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 DEG C, and humidity is 60～80%, and wind speed is 0.2～0.8m/s.
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| CN109750363B (en) * | 2018-12-27 | 2021-01-01 | 江苏恒力化纤股份有限公司 | Preparation method of ultralow-shrinkage polyester industrial yarn |
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