CN102797056A - 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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- CN102797056A CN102797056A CN2012103211490A CN201210321149A CN102797056A CN 102797056 A CN102797056 A CN 102797056A CN 2012103211490 A CN2012103211490 A CN 2012103211490A CN 201210321149 A CN201210321149 A CN 201210321149A CN 102797056 A CN102797056 A CN 102797056A
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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 manufacturing approach of ultralow shrinkage type polyester industrial yarn, belong to polyester industrial yarn and make the field.
Background technology
Terylene has been obtained huge development on industrial use since coming out, polyester industrial yarn is meant, and terylene industrial high-strength, the thick dawn is used long filament.Polyester industrial yarn is high with its fracture strength; Initial modulus is high; Excellent physical and mechanical properties such as percentage elongation is low, and resistance to impact is good are widely used in industry; Can be used as the framework material of 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 the PET molecule is regular arrange its architectural feature, and crystal density is bigger, and degree of crystallinity improves and contraction on the size reduces.It has lower dry-hot shrinkage and characteristics such as DIMENSIONAL STABILITY and be widely used in filter cloth, coated fabric, aspects such as flexible pipe and conveyer belt parallel preferably.
The selection of cooling condition and control are the significant effects factors in the 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, shrinkage factor etc.In order to have obtained the superperformance polyester industrial yarn, under spinnerets, add a kind of annealing device of heating usually, tow is cooled off lentamente, install the zone of silence device simultaneously additional, increase the buffer area of tow, cool off tow more equably.But along with the 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 being easy to generate unsettled air-flow, aggravated the shake of tow, it is unstable to make that melt goes out behind the spinnerets; Spinning technique is under some influence, and the industry silk produces and shrinks, and near the time of staying of as-spun fibre crystal region is longer simultaneously; Thereby cause as-spun fibre degree of crystallinity excessive, can cause lousiness and broken end, decrease in yield in the production.And cooling preferably helps obtaining the fiber of the reasonable degree of orientation and degree of crystallinity, makes fiber have fracture strength height, low, the dry-hot shrinkage advantage of reasonable of line density deviation ratio, can satisfy the needs of using well.
The dry-hot shrinkage of traditional ultralow shrinkage type polyester industrial yarn be approximately 2% (170 ℃, 1min, 0.05g/D), and occur easily shrinking inhomogeneous, irregular problem.In existing technology, the manufacturing technique of the described ultralow shrinkage type polyester industrial yarn of Chinese patent CN 1904153A, though the ultralow shrinkage of this fiber is good, its raw material intrinsic viscosity requires high, heat setting process is comparatively complicated.The described ultralow shrinkage type polyester industrial fiber of patent CN 101307513B is to add inorganic particle through giving in the raw material, does not improve the cooling procedure in the manufacturing technique.
Summary of the invention
The objective of the invention is to overcome the deficiency that exists in the prior art, a kind of manufacturing approach of ultralow shrinkage type polyester industrial yarn is provided.The selection of cooling condition and control are most important influence factors in the polyester industrial yarn forming process; In the melt spinning process; The melt thread of from spinnerets, extruding through cooling air cooling solidified forming, forms the preliminary aggregated structure of fiber; The quality that is shaped directly influences the spinnability of fiber and the quality of finished product, and the degree of orientation of fiber, diameter irregularity, shrinkage factor, degree of crystallinity, tensile property, mechanical property etc. are all had considerable influence.The present invention provides a kind of manufacturing approach of ultralow shrinkage type polyester industrial yarn through the selection and the control of cooling condition.
The manufacturing approach of a kind of ultralow shrinkage type polyester industrial yarn of the present invention, its technological process is high sticking fusion polyester raw material, and------------oiling,---the spray silk stretches---HEAT SETTING---winding shaping in cooling in metering; The terylene chips that is adopted is the sticking section of height that obtains through solid-phase tack producing, and its inherent viscosity is 1.0 ~ 1.2dl/g, because its molecular weight distribution is narrow more, number-average molecular weight is high more, and the resulting fibre strength in back that stretches is high more, and shrinkage factor is more little.Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively; Reduce orientation, crystallization and the contraction of as-spun fibre to greatest extent, improve after-drawing as far as possible than being the basis of making ultralow shrinkage type polyester industrial yarn.Spinning speed and cooling condition are the principal elements that influences the as-spun fibre orientation, and crystallization and contraction then mainly receive the influence of the type of cooling and technology; When melt was extruded from spinnerets, the temperature of melt was very high, a little less than thread is highly brittle; Be unable to undergo the impact of any air-flow; Simultaneously, too fast cooling can cause fiber radially the skin-core structure of cross section increase with the big molecule that produce to curl, and then cause the industry silk to produce to shrink.Contraction for the orientation of controlling as-spun fibre, crystallization and industry silk is provided with annealer (a kind of ring-type heater) in the production of industry silk, with guarantee as-spun fibre evenly, slowly cooling; Annealer is pre-cooler down; Pre-cooler is a kind of passive outer shroud precooling; Described precooling is the tow to the as-spun fibre that is in molten condition; Passive outer shroud precooling is meant air spontaneous current loop device and then strand cooled off outside passive, and passive outer loop device is the hollow out endless belt, and precooling is played important effect to irregularity and the shrinkage factor that reduces fiber; Pre-cooler is no wind apparatus down; No wind apparatus is a kind of ring type structure; Its effect is a calm zone that impales around forming, and the zone of silence cooling is between precooling and blowing cooling, and zone of silence moves down the quench region of tow; Increase the buffer area of tow, can make the cooling of tow more even.Adjust as-spun fibre in the temperature of spinning on the journey through the technology of cooling condition,, finally obtain high-quality fiber to reach the purpose of the orientation, crystallization and the contraction of industry silk that reduce as-spun fibre.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively;
Described slow cooling is meant that the tow ambient temperature is 260 ~ 300 ℃, and slow cooling district exit strand temperature is 280 ~ 285 ℃.
Described precooling is the precooling of passive outer shroud ladder; The precooling of described passive outer shroud ladder is meant that the air spontaneous current cools off through passive outer shroud stepwise device and then to strand; Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is made up of two parts up and down; The ratio of wind area excessively on the top of described hollow out ladder endless belt is 40～60%; Highly be 20～40mm, the described wind area of crossing is than the ratio of the area that is meant air flow openwork part through top, said hollow out ladder endless belt with the area of the windward side on the top of described hollow out ladder endless belt; The ratio of wind area excessively of the lower part of described hollow out ladder endless belt is 15～20%, highly is 20～40mm; The described wind area of crossing is than the ratio of the area that is meant air flow openwork part through lower part, said hollow out ladder endless belt with the area of the windward side of the lower part of described hollow out ladder endless belt;
Described precooling is meant that the tow ambient temperature is 160 ~ 260 ℃, and pre-cooling zone exit strand temperature is 250 ~ 260 ℃.
Described zone of silence cooling is meant that the tow ambient temperature is 100 ~ 160 ℃, and zone of silence exit strand temperature is 230 ~ 240 ℃.
The wind-warm syndrome of described blowing cooling is 15～30 ℃;
The physical index of resulting ultralow shrinkage type polyester industrial yarn: 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%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 1.9 ± 0.25%.
What often the industry silk was stressed is fracture strength and extension at break; And ignore the control of orientation, crystallization and shrinkage factor to as-spun fibre; Bigger orientation, crystallization and shrinkage factor are irregular to intensity, the irregular influence of elongation is very big, and the influence of cooling condition is to cause as-spun fibre orientation, crystallization and the bigger principal element of industry silk shrinkage factor.
As optimized technical scheme:
The described slow cooling of the manufacturing approach of aforesaid a kind of ultralow shrinkage type polyester industrial yarn highly is 250～300mm.
The manufacturing approach of aforesaid a kind of ultralow shrinkage type polyester industrial yarn, described zone of silence cooling highly is 200～300mm.
Height through control slow cooling, precooling, zone of silence guarantees the time of staying of tow, reaches temperature that reduces tow and the purpose that reduces the tow temperature difference radially, to obtain ultralow shrinkage type polyester industrial yarn.
The preparation method of aforesaid a kind of ultralow shrinkage type polyester industrial yarn; The top of described hollow out ladder endless belt is the through hole that is uniformly distributed with diameter 5～7mm on the endless belt; The lower part of described hollow out ladder endless belt is the through hole that is uniformly distributed with diameter 3～4mm on the endless belt; The cloth hole density of the lower part of the top of described hollow out ladder endless belt and described hollow out ladder endless belt equates that described cloth hole density is meant the cloth hole number on the unit are.Pre-cooling zone adopts the hollow out endless belt, and to select certain altitude for use mainly be in order to reduce air flow through the disturbance to tow, to play the temperature action that reduces tow simultaneously again with crossing the wind area.
The manufacturing approach of aforesaid a kind of ultralow shrinkage type polyester industrial yarn, described zone of silence cooling is between precooling and blowing cooling, and zone of silence is meant a calm zone that impales all around.
The manufacturing approach of aforesaid a kind of ultralow shrinkage type polyester industrial yarn, described blowing are cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 15～30 ℃, and humidity is 60～80%, and wind speed is 0.2～0.8m/s.
Ultralow shrinkage type polyester industrial yarn filament number 5～10dtex that the manufacturing approach of aforesaid a kind of ultralow shrinkage type polyester industrial yarn, described method make.
The basic principle of the manufacturing approach of a kind of ultralow shrinkage type polyester industrial yarn of the present invention is:
After the melt thread leaves spinnerets, be cooled immediately, the tensile stress that spinnerets is stretched rises rapidly, will improve the molecular preorientation degree significantly, and fiber radially produces the birefringence gradient.Therefore, obtain the polyester industrial yarn of superperformance, must make the internal stress of strand when solidifying low especially, thereby the molecular preorientation degree is reduced, and then the shrinkage factor of polyester industrial yarn is reduced.Through under spinnerets, adding a kind of annealing device of heating, the melt thread is gone out behind the spinnerets not by quenching, but cooling lentamente; Cooldown rate is reduced, prolong the 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 the slow cooling effect and reduce the 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 air has sufficiently high temperature in this zone, with the decrease speed of control strand temperature, improves the tensile property of fiber.
Tow gets into cooled region through the slow cooling district, 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; The birefringence that has reduced the strand surface that causes because of quenching and strand inner core is poor, alleviates therefore and the core-skin layer fibre structure of formation moves down the quench region of tow; Increase the buffer area of tow, can make the cooling of tow more even.
Along with the 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 industry silk is bigger; Its specific area is less, and as-spun fibre is difficult for heat radiation, and 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, can cause lousiness and broken end in the production.Simultaneously, because the solidification point of fiber and then moves down, tow shake aggravation causes this section to be easy to generate unsettled air-flow, has aggravated the shake of tow, and it is extremely unstable to make that melt goes out behind the spinnerets, is easy to generate the head silk, and spinning technique is under some influence.
Between annealing device and zone of silence, introduce pre-cooler; It at first is the position that has guaranteed the solidification point of as-spun fibre; The solidification point that has reduced fiber moves down the tow that is produced and shakes the irregularity that brings; Next is to control effectively and reduced near the time of staying of fiber 180～200 ℃, thus avoided the excessive institute of as-spun fibre degree of crystallinity caused stretching irregular, shrink excessively, what guarantee to stretch carries out smoothly.
Beneficial effect:
1, through the introducing of pre-cooler, the solidification point that has reduced fiber moves down the tow that is produced and shakes the irregularity that brings, and the line density deviation ratio is controlled in the lower scope.
2, the introducing through pre-cooler finally obtains high-quality fiber to reach the orientation that reduces as-spun fibre and the purpose of crystallization.
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 manufacturing to have fracture strength height, low, the dry-hot shrinkage advantage of reasonable of line density deviation ratio, can satisfy the needs of using well.
The specific embodiment
Below in conjunction with the specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
A kind of manufacturing approach of ultralow shrinkage type polyester industrial yarn, its technological process is high sticking fusion polyester raw material---metering---the spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the high sticking section of PET of 1.1dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively;
Described slow cooling is meant that the tow ambient temperature is 260 ℃, and slow cooling district exit strand temperature is 280 ℃; Slow cooling highly is 250mm.
Described precooling is meant that the tow ambient temperature is 160 ℃, and pre-cooling zone exit strand temperature is 250 ℃; Described precooling highly is 40mm.
Described zone of silence cooling is meant that the tow ambient temperature is 100 ℃, and zone of silence exit strand temperature is 230 ℃; Described zone of silence cooling highly is 200mm.
The wind-warm syndrome of described blowing cooling is 15 ℃; Described blowing is cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 15 ℃, and humidity is 60%, and wind speed is 0.2m/s.
Described four rollers that are stretched as stretch, and the temperature of first roller is 20 ℃, and speed is 1850m/min; The temperature of second roller is 68 ℃, and speed is 2250m/min, and the temperature of the 3rd roller is 192 ℃; Speed is 3435m/min; The 4th roll temperature is 145 ℃, 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 resulting ultralow shrinkage type polyester industrial yarn: 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%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 1.65%.
Embodiment 2
A kind of manufacturing approach of ultralow shrinkage type polyester industrial yarn, its technological process is high sticking fusion polyester raw material---metering---the spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the sticking section of height of 1.09dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively;
Described slow cooling is meant that the tow ambient temperature is 300 ℃, and slow cooling district exit strand temperature is 285 ℃; Slow cooling highly is 300mm.
Described precooling is meant that the tow ambient temperature is 260 ℃, and pre-cooling zone exit strand temperature is 260 ℃; Described precooling highly is 80mm.
Described zone of silence cooling is meant that the tow ambient temperature is 160 ℃, and zone of silence exit strand temperature is 240 ℃; Described zone of silence cooling highly is 300mm.
The wind-warm syndrome of described blowing cooling is 30 ℃; Described blowing is cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 30 ℃, and humidity is 80%, and wind speed is 0.8m/s.
Described four rollers that are stretched as stretch, and the temperature of first roller is 18 ℃, and speed is 1822m/min; The temperature of second roller is 67 ℃, and speed is 2277m/min, and the temperature of the 3rd roller is 213 ℃; Speed is 3926m/min; The 4th roll temperature is 175 ℃, 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 resulting ultralow shrinkage type polyester industrial yarn: 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 ℃, the test condition of 0.05cN/dtex is 2.15%.
Embodiment 3
A kind of manufacturing approach of ultralow shrinkage type polyester industrial yarn, its technological process is high sticking fusion polyester raw material---metering---the spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the sticking section of height of 1.02dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively;
Described slow cooling is meant that the tow ambient temperature is 280 ℃, and slow cooling district exit strand temperature is 283 ℃; Slow cooling highly is 285mm.
Described precooling is meant that the tow ambient temperature is 210 ℃, and pre-cooling zone exit strand temperature is 255 ℃; Described precooling highly is 60mm.
Described zone of silence cooling is meant that the tow ambient temperature is 130 ℃, and zone of silence exit strand temperature is 235 ℃; Described zone of silence cooling highly is 250mm.
The wind-warm syndrome of described blowing cooling is 23 ℃; Described blowing is cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 23 ℃, and humidity is 70%, and wind speed is 0.5m/s.
Described four rollers that are stretched as stretch, and the temperature of first roller is 22 ℃, and speed is 1909m/min; The temperature of second roller is 68 ℃, and speed is 2255m/min, and the temperature of the 3rd roller is 199 ℃; Speed is 3776m/min; The 4th roll temperature is 152 ℃, 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 resulting ultralow shrinkage type polyester industrial yarn: 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 ℃, the test condition of 0.05cN/dtex is 2.0%.
Embodiment 4
A kind of manufacturing approach of ultralow shrinkage type polyester industrial yarn, its technological process is high sticking fusion polyester raw material---metering---the spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the sticking section of height of 1.14dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively;
Described slow cooling is meant that the tow ambient temperature is 260 ℃, and slow cooling district exit strand temperature is 280 ℃; Slow cooling highly is 250mm.
Described precooling is meant that the tow ambient temperature is 160 ℃, and pre-cooling zone exit strand temperature is 250 ℃.Described precooling is passive outer shroud precooling; Described passive outer shroud precooling is meant air spontaneous current loop device and then strand cooled off outside passive.Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is made up of two parts up and down; The ratio of wind area excessively on the top of described hollow out ladder endless belt is 40%; Highly be 20mm, the described wind area of crossing is than the ratio of the area that is meant air flow openwork part through top, said hollow out ladder endless belt with the area of the windward side on the top of described hollow out ladder endless belt; The ratio of wind area excessively of the lower part of described hollow out ladder endless belt is 15%, highly is 20mm; The described wind area of crossing is than the ratio of the area that is meant air flow openwork part through lower part, said hollow out ladder endless belt with the area of the windward side of the lower part of described hollow out ladder endless belt; The top of described hollow out ladder endless belt is the through hole that is uniformly distributed with diameter 5mm on the endless belt; The lower part of described hollow out ladder endless belt is the through hole that is uniformly distributed with diameter 3mm on the endless belt; The cloth hole density of the lower part of the top of described hollow out ladder endless belt and described hollow out ladder endless belt equates that described cloth hole density is meant the cloth hole number on the unit are.
Described zone of silence cooling is meant that the tow ambient temperature is 100 ℃, and zone of silence exit strand temperature is 230 ℃; Described zone of silence cooling highly is 200mm.Described zone of silence cooling is between precooling and blowing cooling, and zone of silence is meant a calm zone that impales all around.
The wind-warm syndrome of described blowing cooling is 15 ℃; Described blowing is cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 15 ℃, and humidity is 60%, and wind speed is 0.2m/s.
Described four rollers that are stretched as stretch, and the temperature of first roller is 19 ℃, and speed is 3250m/min; The temperature of second roller is 78 ℃, and speed is 4850m/min, and the temperature of the 3rd roller is 203 ℃; Speed is 6090m/min; The 4th roll temperature is 147 ℃, 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 resulting ultralow shrinkage type polyester industrial yarn: 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 ℃, the test condition of 0.05cN/dtex is 1.7%.
Embodiment 5
A kind of manufacturing approach of ultralow shrinkage type polyester industrial yarn, its technological process is high sticking fusion polyester raw material---metering---the spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the sticking section of height of 1.08dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively;
Described slow cooling is meant that the tow ambient temperature is 300 ℃, and slow cooling district exit strand temperature is 285 ℃; Slow cooling highly is 300mm.
Described precooling is meant that the tow ambient temperature is 260 ℃, and pre-cooling zone exit strand temperature is 260 ℃.Described precooling is passive outer shroud precooling; Described passive outer shroud precooling is meant air spontaneous current loop device and then strand cooled off outside passive.Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is made up of two parts up and down; The ratio of wind area excessively on the top of described hollow out ladder endless belt is 60%; Highly be 40mm, the described wind area of crossing is than the ratio of the area that is meant air flow openwork part through top, said hollow out ladder endless belt with the area of the windward side on the top of described hollow out ladder endless belt; The ratio of wind area excessively of the lower part of described hollow out ladder endless belt is 20%, highly is 40mm; The described wind area of crossing is than the ratio of the area that is meant air flow openwork part through lower part, said hollow out ladder endless belt with the area of the windward side of the lower part of described hollow out ladder endless belt; The top of described hollow out ladder endless belt is the through hole that is uniformly distributed with diameter 7mm on the endless belt; The lower part of described hollow out ladder endless belt is the through hole that is uniformly distributed with diameter 4mm on the endless belt; The cloth hole density of the lower part of the top of described hollow out ladder endless belt and described hollow out ladder endless belt equates that described cloth hole density is meant the cloth hole number on the unit are.
Described zone of silence cooling is meant that the tow ambient temperature is 160 ℃, and zone of silence exit strand temperature is 240 ℃; Described zone of silence cooling highly is 300mm.Described zone of silence cooling is between precooling and blowing cooling, and zone of silence is meant a calm zone that impales all around.
The wind-warm syndrome of described blowing cooling is 30 ℃; Described blowing is cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 30 ℃, and humidity is 80%, and wind speed is 0.8m/s.
Described four rollers that are stretched as stretch, and the temperature of first roller is 21 ℃, and speed is 3350m/min; The temperature of second roller is 77 ℃, and speed is 4824m/min, and the temperature of the 3rd roller is 213 ℃; Speed is 6240m/min; The 4th roll temperature is 147 ℃, 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 resulting ultralow shrinkage type polyester industrial yarn: 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 ℃, the test condition of 0.05cN/dtex is 2.15%.
Embodiment 6
A kind of manufacturing approach of ultralow shrinkage type polyester industrial yarn, its technological process is high sticking fusion polyester raw material---metering---the spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the sticking section of height of 1.07dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively;
Described slow cooling is meant that the tow ambient temperature is 280 ℃, and slow cooling district exit strand temperature is 284 ℃; Slow cooling highly is 275mm.
Described precooling is meant that the tow ambient temperature is 210 ℃, and pre-cooling zone exit strand temperature is 255 ℃.Described precooling is passive outer shroud precooling; Described passive outer shroud precooling is meant air spontaneous current loop device and then strand cooled off outside passive.Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is made up of two parts up and down; The ratio of wind area excessively on the top of described hollow out ladder endless belt is 50%; Highly be 30mm, the described wind area of crossing is than the ratio of the area that is meant air flow openwork part through top, said hollow out ladder endless belt with the area of the windward side on the top of described hollow out ladder endless belt; The ratio of wind area excessively of the lower part of described hollow out ladder endless belt is 17.5%, highly is 30mm; The described wind area of crossing is than the ratio of the area that is meant air flow openwork part through lower part, said hollow out ladder endless belt with the area of the windward side of the lower part of described hollow out ladder endless belt; The top of described hollow out ladder endless belt is the through hole that is uniformly distributed with diameter 6mm on the endless belt; The lower part of described hollow out ladder endless belt is the through hole that is uniformly distributed with diameter 3.5mm on the endless belt; The cloth hole density of the lower part of the top of described hollow out ladder endless belt and described hollow out ladder endless belt equates that described cloth hole density is meant the cloth hole number on the unit are.
Described zone of silence cooling is meant that the tow ambient temperature is 130 ℃, and zone of silence exit strand temperature is 235 ℃; Described zone of silence cooling highly is 250mm.Described zone of silence cooling is between precooling and blowing cooling, and zone of silence is meant a calm zone that impales all around.
The wind-warm syndrome of described blowing cooling is 17.5 ℃; Described blowing is cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 17.5 ℃, and humidity is 70%, and wind speed is 0.5m/s.
Described four rollers that are stretched as stretch, and the temperature of first roller is 22 ℃, and speed is 3340m/min; The temperature of second roller is 82 ℃, and speed is 4840m/min, and the temperature of the 3rd roller is 212 ℃; Speed is 5909m/min; The 4th roll temperature is 152 ℃, 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 resulting ultralow shrinkage type polyester industrial yarn: 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 ℃, the test condition of 0.05cN/dtex is 2.02%.
Embodiment 7
A kind of manufacturing approach of ultralow shrinkage type polyester industrial yarn, its technological process is high sticking fusion polyester raw material---metering---the spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the sticking section of height of 1.12dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively;
Described slow cooling is meant that the tow ambient temperature is 265 ℃, and slow cooling district exit strand temperature is 282 ℃; Slow cooling highly is 270mm.
Described precooling is meant that the tow ambient temperature is 190 ℃, and pre-cooling zone exit strand temperature is 252 ℃.Described precooling is passive outer shroud precooling; Described passive outer shroud precooling is meant air spontaneous current loop device and then strand cooled off outside passive.Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is made up of two parts up and down; The ratio of wind area excessively on the top of described hollow out ladder endless belt is 48%; Highly be 27mm, the described wind area of crossing is than the ratio of the area that is meant air flow openwork part through top, said hollow out ladder endless belt with the area of the windward side on the top of described hollow out ladder endless belt; The ratio of wind area excessively of the lower part of described hollow out ladder endless belt is 17%, highly is 29mm; The described wind area of crossing is than the ratio of the area that is meant air flow openwork part through lower part, said hollow out ladder endless belt with the area of the windward side of the lower part of described hollow out ladder endless belt; The top of described hollow out ladder endless belt is the through hole that is uniformly distributed with diameter 5.8mm on the endless belt; The lower part of described hollow out ladder endless belt is the through hole that is uniformly distributed with diameter 3.2mm on the endless belt; The cloth hole density of the lower part of the top of described hollow out ladder endless belt and described hollow out ladder endless belt equates that described cloth hole density is meant the cloth hole number on the unit are.
Described zone of silence cooling is meant that the tow ambient temperature is 130 ℃, and zone of silence exit strand temperature is 234 ℃; Described zone of silence cooling highly is 234mm.Described zone of silence cooling is between precooling and blowing cooling, and zone of silence is meant a calm zone that impales all around.
The wind-warm syndrome of described blowing cooling is 22 ℃; Described blowing is cooled to ring blowing cooling, and its technology is 22 ℃ for the temperature of ring blowing, and humidity is 67%, and wind speed is 0.6m/s.
Described four rollers that are stretched as stretch, and the temperature of first roller is 23 ℃, and speed is 3205m/min; The temperature of second roller is 78 ℃, and speed is 5200m/min, and the temperature of the 3rd roller is 213 ℃; Speed is 6290m/min; The 4th roll temperature is 149 ℃, 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 resulting ultralow shrinkage type polyester industrial yarn: 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 ℃, the test condition of 0.05cN/dtex is 1.86%.
Claims (7)
1. the manufacturing approach of a ultralow shrinkage type polyester industrial yarn is characterized in that: described manufacturing approach, and its technological process is high sticking fusion polyester raw material, and------------oiling,---the spray silk stretches---HEAT SETTING---winding shaping in cooling in metering;
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the PET section of 1.0～1.2dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively;
Described slow cooling is meant that the tow ambient temperature is 260 ~ 300 ℃, and slow cooling district exit strand temperature is 280 ~ 285 ℃.
Described precooling is the precooling of passive outer shroud ladder; The precooling of described passive outer shroud ladder is meant that the air spontaneous current cools off through passive outer shroud stepwise device and then to strand; Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is made up of two parts up and down; The ratio of wind area excessively on the top of described hollow out ladder endless belt is 40～60%; Highly be 20～40mm, the described wind area of crossing is than the ratio of the area that is meant air flow openwork part through top, said hollow out ladder endless belt with the area of the windward side on the top of described hollow out ladder endless belt; The ratio of wind area excessively of the lower part of described hollow out ladder endless belt is 15～20%, highly is 20～40mm; The described wind area of crossing is than the ratio of the area that is meant air flow openwork part through lower part, said hollow out ladder endless belt with the area of the windward side of the lower part of described hollow out ladder endless belt;
Described precooling is meant that the tow ambient temperature is 160 ~ 260 ℃, and pre-cooling zone exit strand temperature is 250 ~ 260 ℃.
Described zone of silence cooling is meant that the tow ambient temperature is 100 ~ 160 ℃, and zone of silence exit strand temperature is 230 ~ 240 ℃.
The wind-warm syndrome of described blowing cooling is 15～30 ℃;
The physical index of resulting ultralow shrinkage type polyester industrial yarn: 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%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 1.9 ± 0.25%.
2. the manufacturing approach of a kind of ultralow shrinkage type polyester industrial yarn according to claim 1 is characterized in that, described slow cooling highly is 250～300mm.
3. the manufacturing approach of a kind of ultralow shrinkage type polyester industrial yarn according to claim 1 is characterized in that, described zone of silence cooling highly is 200～300mm.
4. the manufacturing approach of a kind of ultralow shrinkage type polyester industrial yarn according to claim 1; It is characterized in that; The top of described hollow out ladder endless belt is the through hole that is uniformly distributed with diameter 5～7mm on the endless belt; The lower part of described hollow out ladder endless belt is the through hole that is uniformly distributed with diameter 3～4mm on the endless belt, and the cloth hole density of the lower part of the top of described hollow out ladder endless belt and described hollow out ladder endless belt equates that described cloth hole density is meant the cloth hole number on the unit are.
5. the manufacturing approach of a kind of ultralow shrinkage type polyester industrial yarn according to claim 1 is characterized in that, described zone of silence cooling is between precooling and blowing cooling, and zone of silence is meant a calm zone that impales all around.
6. the manufacturing approach of a kind of ultralow shrinkage type polyester industrial yarn according to claim 1 is characterized in that, described blowing is cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 15～30 ℃, and humidity is 60～80%, and wind speed is 0.2～0.8m/s.
7. a kind of ultralow shrinkage type polyester industrial yarn according to claim 1 manufacturing approach, it is characterized in that ultralow shrinkage type polyester industrial yarn filament number 5～10dtex that described method makes.
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