CN102797057A - Manufacturing method for high-modulus low-shrinkage PET industrial yarn - Google Patents
Manufacturing method for high-modulus low-shrinkage PET industrial yarn Download PDFInfo
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Abstract
The invention discloses a manufacturing method for high-modulus low-shrinkage PET industrial yarn, and the technological process of the method is as follows: hyperviscous melting to polyester fiber raw materials, metering, spinning, cooling, oil applying, stretching, hot shaping and reeled forming, wherein the cooling process sequentially comprises four parts including slow-cooling, pre-cooling, calm zone cooling and blow cooling, and the pre-cooling part adopts a passive hollow ring-shaped belt device. Through the introduction of the pre-cooling device, the irregularity caused by tows quivering produced under the down moving of a solidification point of fiber can be reduced, the deviation ratio of linear density can be controlled within a lower range, the purpose of reducing orientation and crystallization of embryo fiber is achieved, finally high-modulus low-shrinkage PET industrial yarn can be obtained, the high-modulus low-shrinkage PET industrial yarn has the advantages of high modulus, low dry heat shrinkage percentage, low breaking elongation and low linear density deviation ratio, and practical application can be well met.
Description
Technical field
The present invention relates to a kind of production method of polyester industrial yarn, especially relate to a kind of HMLS polyester industrial yarn manufacturing approach, belong to dried 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, and its fiber number is not less than 550dtex.Polyester industrial yarn is high with its initial modulus; Fracture strength 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.
The HMLS polyester industrial yarn is owing to have premium properties such as higher initial modulus, higher ultimate strength, lower dry-hot shrinkage, percentage elongation is low, resistance to impact is good; Be mainly used in industrial circles such as automobile and transport tape, in tire and mechanical rubber, the trend that progressively replaces common standard type polyester industrial yarn arranged.
In the technology of preparation HMLS polyester industrial yarn; The selection of cooling condition and control are most important influence 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 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; Be 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 near the time of staying of as-spun fibre crystal region while is longer, thereby causes as-spun fibre degree of crystallinity long; Can cause lousiness and broken end in the production, the line density irregularity raises, decrease in yield.
Existing research shows; The method of acquisition HMLS polyester industrial yarn has multiple, obtains the HMLS polyester industrial yarn like Chinese patent CN02121141.8 through improving stretching and heat setting process, and Chinese patent CN 102277646A is through increasing the HMLS polyester industrial fiber that polyester slice viscosity obtains DIMENSIONAL STABILITY; The terylene industrial filament diameter irregularity that these researchs obtain is higher; And do not consider that all improving process for cooling obtains the HMLS polyester industrial yarn, and suitable process for cooling can guarantee the position stability of as-spun fibre solidification point, reduces the diameter irregularity of fiber; Tow is stable; Cooling is even, thereby obtains high-modulus, the polyester industrial yarn that dry-hot shrinkage is lower.
Summary of the invention
The objective of the invention is to overcome the deficiency that exists in the prior art, provide a kind of HMLS polyester industrial yarn manufacturing approach.The selection of cooling condition and control are the most important influence factors in the polyester industrial yarn forming process; In the melt spinning process; The melt thread that melt is extruded from spinnerets 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, degree of crystallinity, tensile property, mechanical property etc. are all had considerable influence.The present invention provides a kind of manufacturing approach of HMLS polyester industrial yarn through the selection and the control of cooling condition.
The manufacturing approach of a kind of HMLS 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 to cut into slices for high gluing through what solid-phase tack producing obtained, 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 fiber modulus in back that stretches is high more.Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively.Reduce the orientation and the crystallization of as-spun fibre to greatest extent, improve after-drawing as far as possible than being the basis of making the HMLS polyester industrial yarn.Spinning speed and cooling condition are the principal elements that influences the as-spun fibre orientation, and crystallization then mainly receives 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, was unable to undergo the impact of any air-flow, and simultaneously, too fast cooling can cause fiber, and radially the skin-core structure and the curling big molecule of generation of cross section increase.For orientation and the crystallization of controlling as-spun fibre, in the production of industry silk, annealer (a kind of ring-type heater) is set, to guarantee even, the slowly cooling of as-spun fibre; Annealer is pre-cooler down, and pre-cooler is a kind of passive outer shroud precooling that is, 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 the irregularity 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 orientation that reduces as-spun fibre and the purpose of crystallization.
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 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 loop device is the hollow out endless belt, and it crosses wind area ratio is 20～50%, highly is 30～80mm; The described wind area of crossing is than the ratio of the area that is meant the air flow warp with the area of the windward side of passive outer loop device.
Described precooling is meant that the tow ambient temperature is 180～260 ℃, and pre-cooling zone exit strand temperature is 260～265 ℃.
Described zone of silence cooling is meant that the tow ambient temperature is 120～180 ℃, and zone of silence exit strand temperature is 240～245 ℃.
The wind-warm syndrome of described blowing cooling is 15～30 ℃.
The physical index of resulting HMLS polyester industrial yarn: line density deviation ratio≤1.5%; Fracture strength>=7.0cN/dtex; Fracture strength CV value≤2.5%; Modulus>=100N/dtex extension at break is 12.0 ± 1.5%, extension at break CV value≤7.0%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 2.5 ± 0.5%.
What often the industry silk was stressed is fracture strength and extension at break, and ignores the control to shrinkage factor, and shrinkage factor is irregular to intensity, the irregular influence of elongation is very big, and cooling condition is the key factor that influences shrinkage factor.
As optimized technical scheme:
The described slow cooling of the manufacturing approach of aforesaid a kind of HMLS polyester industrial yarn highly is 250～300mm.
The manufacturing approach of aforesaid a kind of HMLS 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 the polyester industrial yarn of low line density deviation ratio.
The manufacturing approach of aforesaid a kind of HMLS polyester industrial yarn, described hollow out ladder endless belt is the through hole that is uniformly distributed with diameter 5～7mm on the endless belt.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 HMLS 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 HMLS 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.
Aforesaid a kind of HMLS polyester industrial yarn manufacturing approach, the filament number of the HMLS polyester industrial yarn that described method makes is 2dtex～10dtex.
The basic principle of the manufacturing approach of a kind of HMLS 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 to have the polyester industrial yarn of superperformance, must make the internal stress of strand when solidifying low especially, thereby the molecular preorientation degree 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 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 ℃, thereby has avoided the excessive institute of as-spun fibre degree of crystallinity to cause stretching irregular, and what guarantee to stretch carries out smoothly.
Beneficial effect:
1, pre-cooling zone adopts the hollow out endless belt that has certain altitude and cross the wind area, reduces air flow through the disturbance to tow, reduces the temperature of tow, has guaranteed carrying out smoothly of subsequent technique.
2, 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.
3, through the introducing of pre-cooler, reach the purpose of the degree of orientation that reduces as-spun fibre, finally obtain high-quality fiber.
4, through the introducing of pre-cooler, control fiber and reached suitable degree of crystallinity, guaranteed carrying out smoothly of stretching and subsequent technique, obtained high-quality fiber.
5, utilize the HMLS polyester industrial yarn of the inventive method manufacturing to have modulus height, dry-hot shrinkage is low, extension at break is low, the line density deviation ratio is low advantage, 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 HMLS 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 PET section of 1.0dl/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 strand temperature is 280 ℃; Described slow cooling highly is 250mm.
Described precooling is meant that the tow ambient temperature is 180 ℃, and strand temperature is 260 ℃; Described precooling highly is 30mm.
Described zone of silence cooling is meant that the tow ambient temperature is 120 ℃, and strand temperature is 240 ℃; 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 1900m/min; The temperature of second roller is 70 ℃, and speed is 2270m/min, and the temperature of the 3rd roller is 200 ℃; Speed is 3200m/min; The 4th roll temperature is 148 ℃, and speed is 3100m/min, and the speed of the 5th roller is 2850m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 2850m/min.
The filament number 2dtex of the HMLS polyester industrial yarn that described method makes.The physical index of resulting HMLS polyester industrial yarn: the line density deviation ratio is 1.5%, and modulus is 100N/dtex, and fracture strength is 7cN/dtex, and extension at break is 11.5%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 2%.
Embodiment 2
A kind of manufacturing approach of HMLS 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 1.2dl/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 300 ℃, and strand temperature is 285 ℃; Described slow cooling highly is 300mm.
Described precooling is meant that the tow ambient temperature is 260 ℃, and strand temperature is 265 ℃; Described precooling highly is 80mm.
Described zone of silence cooling is meant that the tow ambient temperature is 180 ℃, and strand temperature is 245 ℃; 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 22 ℃, and speed is 1850m/min; The temperature of second roller is 72 ℃, and speed is 2260m/min, and the temperature of the 3rd roller is 210 ℃; Speed is 3400m/min; The 4th roll temperature is 145 ℃, and speed is 3350m/min, and the speed of the 5th roller is 2800～3000m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 2875m/min.
The filament number 10dtex of the HMLS polyester industrial yarn that described method makes.The physical index of resulting HMLS polyester industrial yarn: the line density deviation ratio is 1.4%; Modulus is 105N/dtex; Fracture strength is 8.5cN/dtex, and extension at break is 13.5%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 2.4%.
Embodiment 3
A kind of manufacturing approach of HMLS 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 1.2dl/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 280 ℃, and strand temperature is 282 ℃; Described slow cooling highly is 275mm.
Described precooling is meant that the tow ambient temperature is 220 ℃, and strand temperature is 262 ℃; Described precooling highly is 50mm.
Described zone of silence cooling is meant that the tow ambient temperature is 160 ℃, and strand temperature is 242 ℃; Described zone of silence cooling highly is 250mm.
The wind-warm syndrome of described blowing cooling is 20 ℃; Described blowing is cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 20 ℃, 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 23 ℃, and speed is 2100m/min; The temperature of second roller is 78 ℃, and speed is 2280m/min, and the temperature of the 3rd roller is 215 ℃; Speed is 3220m/min; The 4th roll temperature is 152 ℃, and speed is 3150m/min, and the speed of the 5th roller is 2900m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 2900m/min.
The filament number 5dtex of the HMLS polyester industrial yarn that described method makes.The physical index of resulting HMLS polyester industrial yarn: the line density deviation ratio is 1.3%; Modulus is 110N/dtex; Fracture strength is 8.2cN/dtex, and extension at break is 13%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 2.5%.
Embodiment 4
A kind of manufacturing approach of HMLS 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 1.2dl/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 ℃, and strand temperature is 280 ℃; Described slow cooling highly is 250mm.
Described precooling is meant that the tow ambient temperature is 180 ℃, and strand temperature is 260 ℃; Described precooling highly is 30mm.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 loop device is the hollow out endless belt, and it crosses wind area ratio is 20%, highly is 30mm; The described wind area of crossing is than the ratio of the area that is meant the air flow warp with the area of the windward side of passive outer loop device.
Described zone of silence cooling is meant that the tow ambient temperature is 120 ℃, and strand temperature is 240 ℃; 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 20 ℃; Described blowing is cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 20 ℃, 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 19 ℃, and speed is 3300m/min; The temperature of second roller is 78 ℃, and speed is 4850m/min, and the temperature of the 3rd roller is 210 ℃; Speed is 5950m/min; The 4th roll temperature is 147 ℃, and speed is 5890m/min, and the speed of the 5th roller is 5790m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 5790m/min.
The filament number 5dtex of the HMLS polyester industrial yarn that described method makes.The physical index of resulting HMLS polyester industrial yarn: the line density deviation ratio is 1.2%; Modulus is 115N/dtex; Fracture strength is 7.5cN/dtex, and extension at break is 11.5%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 2%.
Embodiment 5
A kind of manufacturing approach of HMLS 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 1.0dl/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 strand temperature is 285 ℃; Described slow cooling highly is 300mm.
Described precooling is meant that the tow ambient temperature is 260 ℃, and strand temperature is 265 ℃; Described precooling highly is 80mm.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 loop device is the hollow out endless belt, and it crosses wind area ratio is 50%, highly is 80mm; The described wind area of crossing is than the ratio of the area that is meant the air flow warp with the area of the windward side of passive outer loop device.
Described zone of silence cooling is meant that the tow ambient temperature is 170 ℃, and strand temperature is 244 ℃; 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 28 ℃; Described blowing is cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 28 ℃, and humidity is 75%, and wind speed is 0.7m/s.
Described four rollers that are stretched as stretch, and the temperature of first roller is 25 ℃, and speed is 3400m/min; The temperature of second roller is 80 ℃, and speed is 4890m/min, and the temperature of the 3rd roller is 225 ℃; Speed is 6500m/min; The 4th roll temperature is 150 ℃, and speed is 6000m/min, and the speed of the 5th roller is 6300m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 6300m/min.
The filament number 5dtex of the HMLS polyester industrial yarn that described method makes.The physical index of resulting HMLS polyester industrial yarn: the line density deviation ratio is 1.1%; Modulus is 105N/dtex; Fracture strength is 8cN/dtex, and extension at break is 12.5%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 2.2%.
Embodiment 6
A kind of manufacturing approach of HMLS 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 1.2dl/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 280 ℃, and strand temperature is 282 ℃; Described slow cooling highly is 275mm.
Described precooling is meant that the tow ambient temperature is 220 ℃, and strand temperature is 262 ℃; Described precooling highly is 50mm.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 loop device is the hollow out endless belt, and it crosses wind area ratio is 35%, highly is 50mm; The described wind area of crossing is than the ratio of the area that is meant the air flow warp with the area of the windward side of passive outer loop device.
Described zone of silence cooling is meant that the tow ambient temperature is 160 ℃, and strand temperature is 242 ℃; 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 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 3500m/min; The temperature of second roller is 85 ℃, and speed is 5100m/min, and the temperature of the 3rd roller is 208 ℃; Speed is 6700m/min; The 4th roll temperature is 152 ℃, and speed is 6500m/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 filament number 5dtex of the HMLS polyester industrial yarn that described method makes.The physical index of resulting HMLS polyester industrial yarn: the line density deviation ratio is 1.5%; Modulus is 110N/dtex; Fracture strength is 7.8cN/dtex, and extension at break is 10.5%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 2.8%.
Embodiment 7
A kind of manufacturing approach of HMLS 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 1.0dl/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 strand temperature is 280 ℃; Described slow cooling highly is 250mm.
Described precooling is meant that the tow ambient temperature is 180 ℃, and strand temperature is 260 ℃; Described precooling highly is 30mm.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 loop device is the hollow out endless belt, and it crosses wind area ratio is 20%, highly is 30mm; The described wind area of crossing is than the ratio of the area that is meant the air flow warp with the area of the windward side of passive outer loop device.
Described zone of silence cooling is meant that the tow ambient temperature is 120 ℃, and strand temperature is 240 ℃; 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 20 ℃; Described blowing is cooled to the ring blast-cold but, and its technology is 20 ℃ for the temperature of ring blowing, 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 20 ℃, and speed is 2100m/min; The temperature of second roller is 72 ℃, and speed is 2280m/min, and the temperature of the 3rd roller is 215 ℃; Speed is 3400m/min; The 4th roll temperature is 145 ℃, and speed is 3150m/min, and the speed of the 5th roller is 2800～3000m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 2850m/min.
The filament number 5dtex of the HMLS polyester industrial yarn that described method makes.The physical index of resulting HMLS polyester industrial yarn: the line density deviation ratio is 1.3%; Modulus is 100N/dtex; Fracture strength is 8.5cN/dtex, and extension at break is 13%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 2.3%.
Embodiment 8
A kind of manufacturing approach of HMLS 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 1.1dl/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 strand temperature is 280 ℃; Described slow cooling highly is 250mm.
Described precooling is meant that the tow ambient temperature is 180 ℃, and strand temperature is 260 ℃; Described precooling highly is 30mm.
Described zone of silence cooling is meant that the tow ambient temperature is 120 ℃, and strand temperature is 240 ℃; Described zone of silence cooling highly is 200mm.
The wind-warm syndrome of described blowing cooling is 15 ℃; Described blowing is cooled to ring blowing cooling, and its technology is 15 ℃ for the temperature of ring blowing, 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 25 ℃, and speed is 3500m/min; The temperature of second roller is 80 ℃, and speed is 5100m/min, and the temperature of the 3rd roller is 208 ℃; Speed is 6500m/min; The 4th roll temperature is 152 ℃, and speed is 6000m/min, and the speed of the 5th roller is 6100m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 6100m/min.
The filament number 5dtex of the HMLS polyester industrial yarn that described method makes.The physical index of resulting HMLS polyester industrial yarn: the line density deviation ratio is 1.1%; Modulus is 110N/dtex; Fracture strength is 7.6cN/dtex, and extension at break is 12%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 2.2%.
Claims (7)
1. the manufacturing approach of a HMLS 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 high sticking section of PET 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 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 loop device is the hollow out endless belt, and it crosses wind area ratio is 20～50%, highly is 30～80mm; The described wind area of crossing is than the ratio of the area that is meant the air flow warp with the area of the windward side of passive outer loop device;
Described precooling is meant that the tow ambient temperature is 180～260 ℃, and pre-cooling zone exit strand temperature is 260～265 ℃;
Described zone of silence cooling is meant that the tow ambient temperature is 120～180 ℃, and zone of silence exit strand temperature is 240～245 ℃;
The wind-warm syndrome of described blowing cooling is 15～30 ℃;
The physical index of resulting HMLS polyester industrial yarn: line density deviation ratio≤1.5%; Fracture strength>=7.0cN/dtex; Fracture strength CV value≤2.5%, modulus>=100N/dtex, extension at break are 12.0 ± 1.5%; Extension at break CV value≤7.0%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 2.5 ± 0.5%.
2. the manufacturing approach of a kind of HMLS 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 HMLS 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 HMLS polyester industrial yarn according to claim 1 is characterized in that, described hollow out ladder endless belt is the through hole that is uniformly distributed with diameter 5～7mm on the endless belt.
5. the manufacturing approach of a kind of HMLS 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 HMLS 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 HMLS polyester industrial yarn according to claim 1 manufacturing approach, it is characterized in that HMLS type polyester industrial yarn filament number 2dtex～10dtex that described method makes.
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| CN108442000A (en) * | 2018-03-08 | 2018-08-24 | 无锡索力得科技发展有限公司 | A kind of rigid line rope production method for imitating high-strength and high-modulus polyester industrial yarn |
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